CN104732925B - A kind of processing method and processing device of rgb signal - Google Patents

A kind of processing method and processing device of rgb signal Download PDF

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CN104732925B
CN104732925B CN201510148679.3A CN201510148679A CN104732925B CN 104732925 B CN104732925 B CN 104732925B CN 201510148679 A CN201510148679 A CN 201510148679A CN 104732925 B CN104732925 B CN 104732925B
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brightness
gray scale
primary color
value
gray
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CN104732925A (en
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路林
曹建伟
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Hisense Visual Technology Co Ltd
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Qingdao Hisense Electronics Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed

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  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The embodiment of the invention discloses a kind of processing method and processing device of rgb signal, it is related to display technology field, to provide a kind of scheme for the power consumption for effectively reducing display device.In embodiments of the present invention, rgb signal is received, obtains the grey decision-making of the three primary colours of the current pixel carried in rgb signal respectively；When the grey decision-making of at least one primary colours in the grey decision-making of three primary colours is zero, according to non-zero grey decision-making, determine whether primary colours corresponding to non-zero grey decision-making reach saturation state, and the grey decision-making for the primary colours for having reached luminance saturation state is converted to the predetermined luminance output valve of corresponding primary colours and the brightness output valve of white；According to the brightness output valve after conversion, the brightness output valve of white and the not up to grey decision-making of the primary colours of saturation state, rgb signal is converted to the RGBW signals of the brightness output valve of the three primary colours for carrying current pixel and white；It is achieved thereby that above-mentioned function.

Description

RGB signal processing method and device
Technical Field
The present invention relates to the field of display technologies, and in particular, to a method and an apparatus for processing RGB signals.
Background
At present, the conventional ultra high definition display technologies mainly include RGB (red, green, blue) ultra high definition display technologies and RGBW (red, green, blue, white) ultra high definition display technologies. In the RGBW ultra-high definition display technology, a White (White) Sub-pixel (Sub-pixel) is added on the basis of the traditional RGB three primary colors (i.e., red, green, and blue), so as to form an RGBW structure, that is, each pixel unit of the display device has a red Sub-pixel light emitting element, a green Sub-pixel light emitting element, a blue Sub-pixel light emitting element, and a White Sub-pixel light emitting element, and the luminance values (also referred to as gray-scale values) of the light emitting units of different colors are adjusted by adjusting the operating voltages or currents of the light emitting elements of different Sub-pixels, so that each pixel unit finally presents colors with different luminances.
However, the image signal in the prior art is usually an RGB signal, and since a white sub-pixel light emitting element is added to the display device adopting the RGBW structure compared with the display device adopting the RGB structure, if the RGB signal is directly input to the display device adopting the RGBW structure, distortion of the display device is easily caused, so that the display device adopting the RGBW structure can be driven to form an image by using the RGBW signal after the RGB signal is converted into the RGBW signal.
However, the RGB-to-RGBW signal conversion scheme in the prior art can only convert RGB signals for displaying white light (white light contains three gray levels of three primary colors), into RGBW signals, and for RGB signals for displaying non-white light (non-white light contains only one gray level or two gray levels), the prior art actually only maintains the original values of the gray levels (i.e. red gray level, green gray level, and blue gray level) in the original RGB signals. However, since the combined transmittance of the green, red and blue sub-pixel light-emitting elements in the display device is much smaller than that of the white sub-pixel light-emitting element, especially when the luminance of red, green or blue tends to be saturated, it is necessary to consume a large amount of power of the display device to drive the green, red or blue sub-pixel light-emitting elements to display higher luminance in order to further increase the luminance of red, green or blue. For example, if the current pixel cell displays blue light, then the brightness of blue light is increased by 10nits (nits) based on the brightness at saturation, a large amount of power consumption will be added.
Therefore, the prior art lacks a method for effectively reducing the power consumption of the display device.
Disclosure of Invention
The embodiment of the invention provides a method and a device for processing RGB signals, which are used for providing a scheme for effectively reducing the power consumption of a display device.
The embodiment of the invention provides a method for processing RGB signals, which comprises the following steps:
receiving RGB signals, and respectively acquiring gray-scale values of three primary colors of a current pixel carried in the RGB signals;
when the gray scale value of at least one of the gray scale values of the three primary colors is zero, determining whether the primary color corresponding to the non-zero gray scale value reaches a saturation state according to the non-zero gray scale value, and converting the gray scale value of the primary color which reaches the brightness saturation state into a preset brightness output value of the corresponding primary color and a white brightness output value; the white brightness corresponding to the brightness output value of the white is used for replacing partial brightness of the primary color which reaches the brightness saturation state;
and converting the RGB signals into RGBW signals carrying the three primary colors of the current pixel and the brightness output value of white according to the converted brightness output value, the brightness output value of white and the gray-scale value of the primary colors which do not reach the saturation state.
The embodiment of the invention provides a processing device of RGB signals, which comprises:
the receiving unit is used for receiving RGB signals and respectively acquiring gray-scale values of three primary colors of a current pixel carried in the RGB signals;
the processing unit is used for determining whether the primary color corresponding to the non-zero gray-scale value reaches a saturation state or not according to the non-zero gray-scale value when the gray-scale value of at least one of the gray-scale values of the three primary colors is zero, and converting the gray-scale value of the primary color which reaches the brightness saturation state into a preset brightness output value of the corresponding primary color and a white brightness output value; the white brightness corresponding to the brightness output value of the white is used for replacing partial brightness of the primary color which reaches the brightness saturation state;
and the conversion unit is used for converting the RGB signals into RGBW signals carrying the three primary colors of the current pixel and the brightness output value of white according to the converted brightness output value, the brightness output value of white and the gray-scale value of the primary color which does not reach the saturation state.
According to the technical scheme, when at least one gray level value of the red, green and blue gray level values is zero, whether the primary color corresponding to the non-zero gray level value reaches a saturation state is determined according to the non-zero gray level value, and the gray level value of the primary color which reaches the brightness saturation state is converted into the preset brightness output value of the corresponding primary color and the preset brightness output value of white; in the display device, the sub-pixel light-emitting elements are driven by currents or voltages with different magnitudes, and in comparison, the white sub-pixel light-emitting element has the highest light comprehensive transmittance (which is greater than the light comprehensive transmittance of the red, blue and green sub-pixel light-emitting elements), so that the power consumption for driving the white sub-pixel light-emitting element to emit light is smaller and the power consumption for driving the red, blue or green sub-pixel light-emitting element is more when the same brightness is achieved; the embodiment of the invention can replace the red or blue or green partial brightness which reaches the brightness saturation state by the white brightness, thereby reducing the power consumption of the display device and improving the imaging effect of the display device.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flowchart of a RGB signal processing method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an RGB signal processing apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention can be applied to various light-emitting display devices, such as: plasma display screen, grating light valve, micro mechanical device, electrowetting display, electrochromic display, electric display, electrophoretic display, field emission display, surface conduction electron emission display, organic light emitting diode display (OLED) and the like, and the images can be displayed only by adopting RGBW structure; the embodiment of the invention is particularly suitable for an OLED display device adopting an RGBW structure. For the OLED, especially in a full color mode of white light with color photoresist (WOLED/CF), the embodiment of the present invention can provide a scheme for converting RGB signals into RGBW signals, which can convert RGB gray scale of a signal source into RGBW signals, and further control color coordinates or color temperature of a displayed image. The scheme provided by the embodiment of the invention can be integrated at a driving control end of the display device, such as a core chip SOC or a time sequence control circuit TCON.
Fig. 1 is a schematic flowchart illustrating a method for processing RGB signals according to an embodiment of the present invention, where as shown in fig. 1, the flowchart includes:
step 11: receiving the RGB signals, and respectively obtaining the gray-scale values of the three primary colors of the current pixel carried in the RGB signals.
Step 12: when the gray scale value of at least one of the gray scale values of the three primary colors is zero, determining whether the primary color corresponding to the non-zero gray scale value reaches a saturation state according to the non-zero gray scale value, and converting the gray scale value of the primary color which reaches the brightness saturation state into a preset brightness output value and a white brightness output value of the corresponding primary color; wherein, the white brightness corresponding to the white brightness output value is used to replace the partial brightness of the primary color which has reached the brightness saturation state.
Step 13: and converting the RGB signals into RGBW signals carrying the three primary colors of the current pixel and the brightness output value of white according to the converted brightness output value, the brightness output value of white and the gray-scale value of the primary colors which do not reach the saturation state.
Optionally, in step 12, when any two gray scale values of the three primary colors are zero, it is determined whether the primary color corresponding to the non-zero gray scale value reaches a brightness saturation state, and if so, the gray scale value of the primary color which has reached the brightness saturation state is converted into a preset brightness output value of the corresponding primary color and a brightness output value of white.
Optionally, in step 12, when only one of the gray scale values of the three primary colors is zero, respectively determining whether the primary colors corresponding to the two non-zero gray scale values reach a brightness saturation state at the same time, if so, converting all components that have reached the brightness saturation state in the primary colors corresponding to the non-zero gray scale values with a lower brightness saturation degree into white brightness components, and replacing part of the brightness that has reached the brightness saturation state in the primary colors corresponding to the non-zero gray scale values with a higher brightness saturation degree by the white brightness, and converting the gray scale values of the primary colors corresponding to the non-zero gray scale values into preset brightness output values of the corresponding primary colors, where the brightness saturation degree represents a difference between the gray scale value of any primary color and a preset saturation gray scale threshold value thereof; if only one of the primary colors corresponding to the non-zero gray scale values reaches the brightness saturation state, the gray scale value of the primary color which has reached the brightness saturation state is converted into a preset brightness output value of the corresponding primary color and a white brightness output value.
Optionally, in step 12, determining whether the primary color corresponding to the non-zero gray scale value reaches a saturation state according to the non-zero gray scale value, specifically, determining whether the non-zero gray scale value of the primary color is greater than a preset saturation gray scale threshold of the corresponding primary color, and if so, determining the primary color as the primary color which has reached the brightness saturation state; otherwise, the primary color is determined as the primary color which does not reach the brightness saturation state.
Optionally, in step 12, the preset saturation gray scale threshold of the primary color that has reached the brightness saturation state is used as the preset brightness output value of the primary color; or, converting the gray-scale value of the primary color which has reached the brightness saturation state into a preset brightness output value of the primary color according to a preset function.
Optionally, after converting the gray-scale value of the primary color that has reached the brightness saturation state into the preset brightness output value of the corresponding primary color and the brightness output value of white, the values of the color coordinates before and after conversion satisfy the following conditions: the value of the delta U 'V' is less than or equal to a preset threshold value; preferably, the preset threshold value ranges from [ -0.06, +0.06 ].
The OLED employing the RGBW structure will be described in detail as an example.
The embodiment of the present invention can be preferably applied to an application scenario in which at least one luminance component with a zero value exists in the gray scale values of red, green, and blue in the RGB signal, that is, the embodiment of the present invention can be applied to the following application scenarios: the signal source is an RGB signal, an application scene of which the signal source only has a red (R) gray scale, an application scene of which the signal source is an RGB signal and of which the RGB signal only has a green (G) gray scale, an application scene of which the signal source is an RGB signal and of which the RGB signal only has a blue (B) gray scale, an application scene of which the signal source is an RGB signal and of which the signal source only has an R gray scale and a G gray scale, an application scene of which the signal source is an RGB signal and of which the signal source only has an R gray scale and a B gray scale, and an application scene of which the signal source is an RGB signal and of which the signal source only has a B gray scale and a G gray scale.
The brightness saturation degree in the embodiment of the present invention may be used to indicate a degree that a gray scale value of a primary color approaches to or exceeds a preset saturation gray scale threshold, and if the gray scale value of the primary color reaches the preset saturation gray scale threshold, the primary color may be considered as the primary color that has reached the brightness saturation state, and a value that the gray scale value of the primary color is greater than the preset saturation gray scale threshold may be taken as the degree that has reached the brightness saturation state; if the gray scale value of the primary color does not reach the preset saturation gray scale threshold value, the primary color can be considered as the primary color which does not reach the brightness saturation state, and the value of the gray scale value of the primary color which is smaller than the preset saturation gray scale threshold value can be used as the degree of not reaching the brightness saturation state (or when the value is small enough, the value can be used as the degree of approaching the brightness saturation state).
In the embodiment of the present invention, for convenience of description, the red gray scale value in the RGB signal may be referred to as R gray scale or R gray scale for shortinThe green gray scale value in the RGB signal is referred to as G gray scale or GinThe blue gray level value in the RGB signal is referred to as G gray level or Gin(ii) a The red luminance output value in the converted RGBW signal can also be abbreviated as RoutThe green luminance output value in the converted RGBW signal is abbreviated as GoutThe blue luminance output value in the converted RGBW signal is abbreviated as BoutThe white luminance output value in the RGBW signal after conversion is abbreviated as Wout。
In a preferred embodiment, in an application scenario where the signal source is an RGB signal and only a red (R) gray level exists in the RGB signal, the converted R isoutAnd WoutThe following conditions are satisfied:
when R isin<RthWhen R isout＝RinAnd Wout＝0
When R isin>RthWhen R isout≤RinAnd Wout＝f(R)in
Wherein R isthFor the predetermined red saturation gray level threshold, f (x) can be a predetermined function.
Thus, when the red gray scale in the RGB signal is at RthAnd when the saturation tends to be in the future, the component of the white brightness component is increased, so that △ U 'V' is less than or equal to +/-0.02, thereby greatly improving the brightness of red under the condition of keeping low power consumption and avoiding the red high brightness saturation phenomenon which often occurs in the prior art, wherein U 'V' belongs to a 1976 color coordinate system, (U ', V') is used for representing a color, and △ U 'V' is the square root of the sum of squares of the difference values of the color coordinates U 'and V' before and after the change.
As another preferred embodiment, in the application scenario that the signal source is RGB signal and only G gray level exists in the RGB signal, the converted G isoutAnd WoutThe following conditions are satisfied:
when G isin<GthWhen, Gout＝GinAnd Wout＝0
When G isin>GthWhen, Gout≤GinAnd Wout＝f(G)in
Wherein G isthFor the predetermined green saturation gray level threshold, f (x) can be a predetermined function.
Thus, when the green gray scale in the RGB signal is GthIncreasing the whiteness when the color tends to be saturated laterThe composition of the luminance component of the color is such that △ U 'V' is ≦ 0.02, thereby greatly increasing the luminance of the green color while keeping power consumption low, avoiding the saturation of the high luminance of the green color that often occurs in the prior art, wherein U 'V' belongs to the 1976 color coordinate system and (U ', V') is used to characterize a color. △ U 'V' is the square root of the sum of the squares of the differences of the color coordinates U 'and V' before and after alteration.
As another preferred embodiment, in the application scenario that the signal source is RGB signal and only B gray scale exists in the RGB signal, the converted B isoutAnd WoutThe following conditions are satisfied:
when B is presentin<BthWhen, Bout＝BinAnd Wout＝0
When B is presentin>BthWhen, Bout≤BinAnd Wout＝f(B)in
Wherein, BinIs an input gray scale value of blue, BthFor the predetermined green saturation gray level threshold, f (x) can be a predetermined function.
Thus, when the green gray scale in the RGB signal is at BthAnd when the color tends to be saturated later, the component of the white brightness component is increased, so that △ U 'V' is less than or equal to +/-0.02, thereby greatly improving the brightness of green under the condition of keeping low power consumption and avoiding the green high brightness saturation phenomenon which often occurs in the prior art, wherein U 'V' belongs to a 1976 color coordinate system, (U ', V') is used for representing a color, and △ U 'V' is the square root of the sum of squares of the difference values of the color coordinates U 'and V' before and after the change.
In another preferred embodiment, in an application scenario where the signal source is an RGB signal and only R gray level and G gray level exist in the RGB signal, the converted R gray level isout、GoutAnd WoutThe following conditions are satisfied:
when R isin<RthAnd Gin<GthWhen R isout＝Rin、Gout＝GinAnd Wout＝0
When R isin<RthAnd Gin>GthWhen R isout＝Rin、Gout≤GinAnd Wout＝f(G)in
When R isin>RthAnd Gin<GthWhen R isout≤Rin、Gout＝GinAnd Wout＝f(R)in
When R isin>RthAnd Gin>GthWhen R isout≤Rin、Gout≤GinAnd Wout＝min(f(R)in，(f)Gin)
Wherein R isthFor presetting a red saturation gray level threshold value, GthFor a predetermined green saturation gray level threshold, f (x) can be a predetermined function, where W isoutAccording to RinAnd RthDifference of (G)inAnd GthIs determined by the minimum of the differences of (a).
Therefore, when the red gray scale and/or the green gray scale in the RGB signal tend to be saturated, the components of the white brightness component are increased, so that the delta U 'V' is less than or equal to +/-0.02, thereby greatly improving the brightness of the red and/or the green under the condition of keeping low power consumption and avoiding the red and/or green high brightness saturation phenomenon frequently occurring in the prior art. Wherein U 'V' belongs to the 1976 color coordinate system and (U ', V') is used for representing a color. Δ U 'V' is the square root of the sum of squares of the differences between the color coordinates U 'and V' before and after the change.
In another preferred embodiment, in an application scenario where the signal source is an RGB signal and only R gray scale and B gray scale exist in the RGB signal, the converted R gray scale and B gray scale exist in the RGB signalout、BoutAnd WoutThe following conditions are satisfied:
when R isin<RthAnd Bin<BthWhen R isout＝Rin、Bout＝BinAnd Wout＝0
When R isin<RthAnd Bin>BthWhen R isout＝Rin、Bout≤BinAnd Wout＝f(B)in
When R isin>RthAnd Bin<BthWhen R isout≤Rin、Bout＝BinAnd Wout＝f(R)in
When R isin>RthAnd Bin>BthWhen R isout≤Rin、Bout≤BinAnd Wout＝min(f(R)in，(f)Bin)
Wherein R isthFor presetting a red saturation gray level threshold value, BthFor a predetermined blue saturation gray level threshold, f (x) can be a predetermined function, where W isoutAccording to RinAnd RthDifference of (A) and (B)inAnd BthIs determined by the minimum of the differences of (a).
Therefore, when the red gray scale and/or the blue gray scale in the RGB signal tend to be saturated, the components of the white brightness component are increased, so that the delta U 'V' is less than or equal to +/-0.02, thereby greatly improving the brightness of the red and/or the blue under the condition of keeping low power consumption and avoiding the red and/or blue high brightness saturation phenomenon frequently occurring in the prior art. Wherein U 'V' belongs to the 1976 color coordinate system and (U ', V') is used for representing a color. Δ U 'V' is the square root of the sum of squares of the differences between the color coordinates U 'and V' before and after the change.
In another preferred embodiment, in an application scenario where the signal source is an RGB signal and only a G gray level and a B gray level exist in the RGB signal, the converted G gray level is obtainedout、BoutAnd WoutThe following conditions are satisfied:
when G isin<GthAnd Bin<BthWhen, Gout＝Gin、Bout＝BinAnd Wout＝0
When G isin<GthAnd Bin>BthWhen, Gout＝Gin、Bout≤BinAnd Wout＝f(B)in
When G isin>GthAnd Bin<BthWhen, Gout≤Gin、Bout＝BinAnd Wout＝f(G)in
When G isin>GthAnd Bin>BthWhen, Gout≤Gin、Bout≤BinAnd Wout＝min(f(G)in，(f)Bin)
Wherein G isthFor presetting a green saturation gray scale threshold value, BthFor a predetermined blue saturation gray level threshold, f (x) can be a predetermined function, where W isoutIs according to GinAnd GthDifference of (A) and (B)inAnd BthIs determined by the minimum of the differences of (a).
Therefore, when the green gray scale and/or the blue gray scale in the RGB signal tend to be saturated, the component of the white brightness component is increased, so that the delta U 'V' is less than or equal to +/-0.02, thereby greatly improving the brightness of the green and/or blue under the condition of keeping low power consumption and avoiding the phenomenon of high brightness saturation of the green and/or blue frequently occurring in the prior art. Wherein U 'V' belongs to the 1976 color coordinate system and (U ', V') is used for representing a color. Δ U 'V' is the square root of the sum of squares of the differences between the color coordinates U 'and V' before and after the change.
It should be noted that, in the embodiment of the present invention, the f (x) function may be a power function or a combination of multiple power functions, such as: f (x) xa(ii) a The (x) function may also be a trigonometric function or a combination of trigonometric functions; the (x) function may also be a hyperbolic function or a combination of hyperbolic functions; f. of(x) The function may also be any other function satisfying the above conditions, and will not be described herein again.
It should be noted that the processing method for converting the RGB signal into the RGBW signal provided in the embodiment of the present invention is not only applicable to a static picture, but also applicable to a dynamic picture.
It should be noted that, in the embodiment of the present invention, the apparatus for performing the processing method of converting the RGB signal into the RGBW signal may be integrated at the driving control end, such as the core chip SOC or the timing control circuit TCON; namely, the RGB gray scale of the signal source is converted into RGBW signal (R)outGoutBoutWout) Dynamically adjusting the converted R according to the gray scale signaloutGoutBoutWoutAnd the gray scale is further used for controlling the Gamma circuit with the RGBW structure.
Therefore, the RGB-to-RGBW algorithm provided by the embodiment of the invention can greatly improve the peak brightness of a small window and provide a wider brightness dynamic ratio.
The first embodiment is as follows:
when the signal source is in red gray scale and R isinAt 200 f, experiments have shown that the prior art is at the 176 gray level (i.e., when R is present)th176), if only the red luminance is increased, for example, the red luminance is increased by 10nits, the power consumption is increased by 70W. By adopting the embodiment of the invention, RinConversion of gray scale to RoutI.e. Rin＝Rth176; gradually increasing the white brightness component, converting the saturated red brightness into white brightness (i.e. replacing the highly saturated red gray scale with the white brightness component), and for the display effect of the display device (such as an OLED), the red display brightness is rapidly increased, and since the light comprehensive transmittance of the white sub-pixel light-emitting element is high, if the 10nits brightness is increased, only the power consumption needs to be increased by 9W; therefore, the embodiment of the invention can effectively reduce the display device on the premise of ensuring the display effect and the brightnessAnd power consumption is reduced, and user experience is improved.
For example, for R, when Rin＞RthWhen W isout＝(Wout-Rth)∧α＝(Wout-Rth)∧0.8136. The specific reasoning process is as follows: in order to avoid saturation of R luminance, it is necessary to increase the component of the white luminance component so that the component of the white luminance component gradually increases, with a maximum value of Rth3% of the gray-scale luminance, when the deviation of the color coordinates of R is △ U 'V' is ≦ 0.02, therefore, 0 ≦ (((W)out-Rth)∧α)/255)∧2.2≤(Rth/255)∧2.2 x 3% wherein, WoutHas a value range of [ R ]th,255]. When R isth＝176、WoutWhen the value is 255, α is calculated to be 0.8136, that is, the color shift before and after conversion satisfies the preset condition by adjusting the output weight of the white luminance value.
Example two:
when the signal source is green gray scale and GinAt 222, experiments have shown that the prior art is at 208 gray levels (i.e., at this time G)th208), if only the green luminance is increased, for example, the green luminance is increased by 10nits, the power consumption is increased by 20W. By adopting the embodiment of the invention, GinConversion of gray scale to GoutI.e. Gin＝Gth208; gradually increasing the white brightness component, converting the saturated green brightness into white brightness (i.e. replacing the high saturated green gray scale by the white brightness component), and for the display effect of the display device (such as an OLED), rapidly increasing the green display brightness, because the light comprehensive transmittance of the white sub-pixel light-emitting element is higher, if the 10nits brightness is increased, only increasing the power consumption by 9W; therefore, the embodiment of the invention can effectively reduce the power consumption of the display device and improve the user experience on the premise of ensuring the display effect and the brightness.
By way of example toIn the case of G, when Gin＞GthWhen W isout＝(Wout-Gth)∧α＝(Wout-Gth)∧1.114. The specific reasoning process is as follows: in order to avoid saturation of the G luminance, it is necessary to increase the white luminance component so that the white luminance component gradually increases in composition and has a maximum value of GthThe gray scale brightness is 10%, and the color coordinate deviation of R is △ U 'V' ≦ 0.02, therefore, 0 ≦ (((W)out-Gth)∧α)/255)∧2.2≤(Gth/255)∧2.2 x 10% of WoutHas a value range of [ Gth,255]. When G isth＝208、WoutWhen the value is 255, α is calculated to be 1.114, that is, the color shift before and after conversion satisfies the preset condition by adjusting the output weight of the white luminance value.
Example three:
when the signal source is blue gray scale and BinAt 144, experiments have shown that the prior art is at the gray level of 144 (i.e., when B is present)th144), if only the blue luminance is increased, for example, the blue luminance is increased by 10nits, the power consumption needs to be increased by 200W. By adopting the embodiment of the invention, BinConversion of gray scale to BoutI.e. Bin＝Bth144; gradually increasing the white brightness component, converting the saturated blue brightness into white brightness (i.e. replacing the high saturated blue gray scale by the white brightness component), and for the display effect of the display device (such as an OLED), rapidly increasing the blue display brightness, because the light comprehensive transmittance of the white sub-pixel light-emitting element is higher, if the 10nits brightness is increased, only increasing the power consumption by 9W; therefore, the embodiment of the invention can effectively reduce the power consumption of the display device and improve the user experience on the premise of ensuring the display effect and the brightness.
For example, for B, when Bin＞BthWhen W isout＝(Wout-Bth)∧α＝(Wout-Bth)∧1.055. The specific reasoning process is as follows: in order to avoid saturation of B luminance, it is necessary to increase the white luminance component so that the white luminance component gradually increases in composition and has a maximum value of BthThe gray scale luminance is 100%, and the deviation of the color coordinate of R is △ U 'V' is ≦ 0.02, so 0 ≦ (((W)out-Bth)∧α)/255)∧2.2≤(Bth/255)∧2.2 x 100% wherein, WoutHas a value range of [ Bth,255]. When B is presentth＝144、WoutWhen it is 255, α is calculated to be 1.055, that is, the color shift before and after conversion satisfies the preset condition by adjusting the output weight of the white luminance value.
It should be noted that in the above embodiment, α may be in the range of [0.5,1.5 ]]It can be seen from the above technical solution that the embodiment of the present invention can significantly improve the brightness saturation problem of R, G, B, and further, to significantly improve the R condition, the range of △ U ' V ' can be enlarged, such as △ U ' V ' ≦ 0.06, at which time W is equal to or less than W ' V ≦ 0.06outMaximum value of brightness is RthThe saturation problem of R can be further improved by 10% of the gray-scale luminance and α being 0.9408.
According to the technical scheme, when at least one gray level value of the red, green and blue gray level values is zero, whether the primary color corresponding to the non-zero gray level value reaches a saturation state is determined according to the non-zero gray level value, and the gray level value of the primary color which reaches the brightness saturation state is converted into the preset brightness output value of the corresponding primary color and the preset brightness output value of white; in the display device, the sub-pixel light-emitting elements are driven by currents or voltages with different magnitudes, and in comparison, the white sub-pixel light-emitting element has the highest light comprehensive transmittance (which is greater than the light comprehensive transmittance of the red, blue and green sub-pixel light-emitting elements), so that the power consumption for driving the white sub-pixel light-emitting element to emit light is smaller and the power consumption for driving the red, blue or green sub-pixel light-emitting element is more when the same brightness is achieved; the embodiment of the invention can replace the red or blue or green partial brightness which reaches the brightness saturation state by the white brightness, thereby reducing the power consumption of the display device and improving the imaging effect of the display device.
Based on the same technical concept, fig. 2 shows a schematic structural diagram of an RGB signal processing apparatus provided in an embodiment of the present invention, and as shown in fig. 2, the apparatus includes:
the receiving unit 21 is configured to receive RGB signals, and respectively obtain gray scale values of three primary colors of a current pixel carried in the RGB signals;
the processing unit 22 is configured to determine whether a primary color corresponding to a non-zero gray-scale value reaches a saturation state according to the non-zero gray-scale value when a gray-scale value of at least one of the gray-scale values of the three primary colors is zero, and convert the gray-scale value of the primary color which has reached the brightness saturation state into a preset brightness output value of the corresponding primary color and a brightness output value of white; the white brightness corresponding to the white brightness output value is used for replacing partial brightness of the primary color which reaches the brightness saturation state;
the converting unit 23 is configured to convert the RGB signals into RGBW signals carrying the luminance output values of the three primary colors and white of the current pixel according to the converted luminance output value, the luminance output value of white, and the gray-scale value of the primary color not reaching the saturation state.
Optionally, the processing unit 22 is specifically configured to: when any two gray scale values of the three primary colors are zero, judging whether the primary color corresponding to the non-zero gray scale value reaches a brightness saturation state, if so, converting the gray scale value of the primary color which has reached the brightness saturation state into a preset brightness output value of the corresponding primary color and a white brightness output value.
Optionally, the processing unit 22 is specifically configured to: when only one gray scale value in the gray scale values of the three primary colors is zero, respectively judging whether the primary colors corresponding to two non-zero gray scale values simultaneously reach a brightness saturation state, if so, converting all components which reach the brightness saturation state in the primary colors corresponding to the non-zero gray scale values with lower brightness saturation degree into white brightness components, replacing part of the brightness which reaches the brightness saturation state in the primary colors corresponding to the non-zero gray scale values with higher brightness saturation degree by the white brightness, and converting the gray scale values of the primary colors corresponding to the non-zero gray scale values into preset brightness output values of the corresponding primary colors, wherein the brightness saturation degree represents the difference value of the gray scale value of any primary color and a preset saturation gray scale threshold value thereof; if only one of the primary colors corresponding to the non-zero gray scale values reaches the brightness saturation state, the gray scale value of the primary color which has reached the brightness saturation state is converted into a preset brightness output value of the corresponding primary color and a white brightness output value.
Optionally, the processing unit 22 is specifically configured to: judging whether the non-zero gray scale value of the primary color is larger than a preset saturation gray scale threshold value of the corresponding primary color, if so, determining the primary color as the primary color which reaches a brightness saturation state; otherwise, the primary color is determined as the primary color which does not reach the brightness saturation state.
Optionally, the processing unit 22 is specifically configured to: taking a preset saturation gray scale threshold value of the primary color which reaches the brightness saturation state as a preset brightness output value of the primary color; or, converting the gray-scale value of the primary color which has reached the brightness saturation state into a preset brightness output value of the primary color according to a preset function.
Optionally, after converting the gray-scale value of the primary color that has reached the brightness saturation state into the preset brightness output value of the corresponding primary color and the brightness output value of white, the values of the color coordinates before and after conversion satisfy the following conditions: the value of the delta U 'V' is less than or equal to a preset threshold value; preferably, the preset threshold value ranges from [ -0.06, +0.06 ].
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, implement the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A method for processing RGB signals, the method comprising:
receiving RGB signals, and respectively acquiring gray-scale values of three primary colors of a current pixel carried in the RGB signals;
when the gray scale value of at least one of the gray scale values of the three primary colors is zero, determining whether the primary color corresponding to the non-zero gray scale value reaches a saturation state according to the non-zero gray scale value, and converting the gray scale value of the primary color which reaches the brightness saturation state into a preset brightness output value of the corresponding primary color and a white brightness output value; if one primary color corresponding to the nonzero gray scale value reaches a saturation state, converting the gray scale value of the primary color which reaches the brightness saturation state into a preset brightness output value of the corresponding primary color and a white brightness output value; if the primary colors corresponding to the two nonzero gray-scale values reach the saturation state, converting all components which reach the brightness saturation state in the primary colors corresponding to the nonzero gray-scale values with lower brightness saturation degree into white brightness components, replacing part of the brightness which reaches the brightness saturation state in the primary colors with higher brightness saturation degree by the white brightness, and converting the gray-scale values of the primary colors corresponding to the nonzero gray-scale values into preset brightness output values of the corresponding primary colors;
and converting the RGB signals into RGBW signals carrying the three primary colors of the current pixel and the brightness output value of white according to the converted brightness output value, the brightness output value of white and the gray-scale value of the primary colors which do not reach the saturation state.
2. The processing method as claimed in claim 1, wherein said converting the gray-scale values of the primary colors having reached the luminance saturation state into the preset luminance output values of the corresponding primary colors and the luminance output value of white, comprises:
when any two gray scale values of the three primary colors are zero, judging whether the primary color corresponding to the non-zero gray scale value reaches a brightness saturation state, if so, converting the gray scale value of the primary color which has reached the brightness saturation state into a preset brightness output value of the corresponding primary color and a white brightness output value.
3. The processing method as claimed in claim 1, wherein said converting the gray-scale values of the primary colors having reached the luminance saturation state into the preset luminance output values of the corresponding primary colors and the luminance output value of white, comprises:
when only one gray scale value in the gray scale values of the three primary colors is zero, respectively judging whether the primary colors corresponding to two non-zero gray scale values reach a brightness saturation state at the same time, if so, converting all components which reach the brightness saturation state in the primary colors corresponding to the non-zero gray scale values with lower brightness saturation degree into white brightness components, replacing part of the brightness which reaches the brightness saturation state in the primary colors corresponding to the non-zero gray scale values with higher brightness saturation degree by the white brightness, and converting the gray scale values of the primary colors corresponding to the non-zero gray scale values into preset brightness output values of the corresponding primary colors, wherein the brightness saturation degree represents the difference value of the gray scale value of any primary color and a preset saturation gray scale threshold value thereof; and if only one of the primary colors corresponding to the non-zero gray scale values reaches a brightness saturation state, converting the gray scale value of the primary color which reaches the brightness saturation state into a preset brightness output value of the corresponding primary color and a white brightness output value.
4. The processing method according to any one of claims 1 to 3, wherein said determining whether the primary color corresponding to the non-zero gray level value reaches a saturation state according to the non-zero gray level value comprises:
judging whether the nonzero gray scale value of the primary color is larger than a preset saturation gray scale threshold value of the corresponding primary color, if so, determining the primary color as the primary color which reaches a brightness saturation state; otherwise, the primary color is determined as the primary color which does not reach the brightness saturation state.
5. The processing method as claimed in claim 4, wherein said converting the gray-scale values of the primary colors having reached the luminance saturation state into the preset luminance output values of the corresponding primary colors comprises:
taking a preset saturation gray scale threshold value of the primary color which reaches the brightness saturation state as a preset brightness output value of the primary color; or,
and converting the gray-scale value of the primary color which reaches the brightness saturation state into a preset brightness output value of the primary color according to a preset function.
6. An apparatus for processing RGB signals, the apparatus comprising:
the receiving unit is used for receiving RGB signals and respectively acquiring gray-scale values of three primary colors of a current pixel carried in the RGB signals;
the processing unit is used for determining whether the primary color corresponding to the non-zero gray-scale value reaches a saturation state or not according to the non-zero gray-scale value when the gray-scale value of at least one of the gray-scale values of the three primary colors is zero, and converting the gray-scale value of the primary color which reaches the brightness saturation state into a preset brightness output value of the corresponding primary color and a white brightness output value; if one primary color corresponding to the nonzero gray scale value reaches a saturation state, converting the gray scale value of the primary color which reaches the brightness saturation state into a preset brightness output value of the corresponding primary color and a white brightness output value; if the primary colors corresponding to the two nonzero gray-scale values reach the saturation state, converting all components which reach the brightness saturation state in the primary colors corresponding to the nonzero gray-scale values with lower brightness saturation degree into white brightness components, replacing part of the brightness which reaches the brightness saturation state in the primary colors with higher brightness saturation degree by the white brightness, and converting the gray-scale values of the primary colors corresponding to the nonzero gray-scale values into preset brightness output values of the corresponding primary colors;
and the conversion unit is used for converting the RGB signals into RGBW signals carrying the three primary colors of the current pixel and the brightness output value of white according to the converted brightness output value, the brightness output value of white and the gray-scale value of the primary color which does not reach the saturation state.
7. The apparatus as claimed in claim 6, wherein said processing unit is specifically configured to:
when any two gray scale values of the three primary colors are zero, judging whether the primary color corresponding to the non-zero gray scale value reaches a brightness saturation state, if so, converting the gray scale value of the primary color which has reached the brightness saturation state into a preset brightness output value of the corresponding primary color and a white brightness output value.
8. The apparatus as claimed in claim 6, wherein said processing unit is specifically configured to:
when only one gray scale value in the gray scale values of the three primary colors is zero, respectively judging whether the primary colors corresponding to two non-zero gray scale values simultaneously reach a brightness saturation state, if so, converting all components which reach the brightness saturation state in the primary colors corresponding to the non-zero gray scale values with lower brightness saturation degree into white brightness components, replacing part of the brightness which reaches the brightness saturation state in the primary colors corresponding to the non-zero gray scale values with higher brightness saturation degree by the white brightness, and converting the gray scale values of the primary colors corresponding to the non-zero gray scale values into preset brightness output values of the corresponding primary colors, wherein the brightness saturation degree represents the difference value of the gray scale value of any primary color and a preset saturation gray scale threshold value thereof; and if only one of the primary colors corresponding to the non-zero gray scale values reaches a brightness saturation state, converting the gray scale value of the primary color which reaches the brightness saturation state into a preset brightness output value of the corresponding primary color and a white brightness output value.
9. The apparatus according to any one of claims 6 to 8, wherein the processing unit is specifically configured to:
judging whether the nonzero gray scale value of the primary color is larger than a preset saturation gray scale threshold value of the corresponding primary color, if so, determining the primary color as the primary color which reaches a brightness saturation state; otherwise, the primary color is determined as the primary color which does not reach the brightness saturation state.
10. The apparatus as claimed in claim 9, wherein said processing unit is specifically configured to:
taking a preset saturation gray scale threshold value of the primary color which reaches the brightness saturation state as a preset brightness output value of the primary color; or, converting the gray-scale value of the primary color which has reached the brightness saturation state into a preset brightness output value of the primary color according to a preset function.
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