CN110400544A - Signal processing method and display device - Google Patents
Signal processing method and display device Download PDFInfo
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- CN110400544A CN110400544A CN201910716762.4A CN201910716762A CN110400544A CN 110400544 A CN110400544 A CN 110400544A CN 201910716762 A CN201910716762 A CN 201910716762A CN 110400544 A CN110400544 A CN 110400544A
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- backlight
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/3406—Control of illumination source
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
A kind of signal processing method includes: capturing timing control signal by signal capturing circuit；A plurality of pixel information signals are received by counting circuit and according to pixel information signal calculated complex backlight document signal；Corresponding a plurality of backlight control signals are exported according to timing control signal and backlight document signal by backlight control circuit；And it is carried out by back light member according to backlight control signal luminous.This case can thus improve the fineness and contrast of display.
Description
Technical field
This disclosure is and especially a kind of adjustment backlight illumination about a kind of signal processing method and display device
Signal processing method and display device.
Background technique
With development in science and technology, the demand of display device is more and more extensive.Due to liquid crystal display (liquid-crystal
Display, LCD) brightness limited by liquid crystal molecule material structure so that liquid crystal display still has portion in black picture
Light splitter transmits, and causes the contrast of display that can not be promoted.
Therefore, the contrast for how effectively promoting liquid crystal display, be design at present considering and challenging.
Summary of the invention
A kind of state sample implementation system of this disclosure includes: being picked by signal capturing circuit about a kind of signal processing method
Take timing control signal；A plurality of pixel information signals are received by counting circuit and are carried on the back according to pixel information signal calculated complex
Light document signal；Corresponding a plurality of backlight controls are exported according to timing control signal and backlight document signal by backlight control circuit
Signal processed；And it is carried out by back light member according to backlight control signal luminous.
In some embodiments, one of backlight document signal person corresponds to it in a plurality of backlight areas of back light member
One corresponds to a plurality of pixels in backlight area each, one of pixel person corresponds to one of pixel information signal person,
It wherein calculates backlight document signal to further include: the pixel information signal by counting circuit judgement corresponding to one of backlight area person
In the maximum；And it is calculated according to the maximum in pixel information signal corresponding to the back in this backlight area by counting circuit
Light document signal.
In some embodiments, it is further included wherein calculating backlight document signal: will be in pixel information signal by counting circuit
Pulse width modulation value of the maximum divided by pixel information signal maximum value as backlight document signal.
In some embodiments, wherein output backlight control signal further includes: by backlight control circuit according to backlight data
Signal generates backlight control signal；And output backlight control signal is controlled according to timing control signal by backlight control circuit
Time.
Another state sample implementation system of this disclosure includes back light member and processor about a kind of display device.Back
Optical element includes a plurality of backlight areas.Backlight area respectively corresponds a plurality of pixels.Processor couples back light member.Processor
Include signal capturing circuit, counting circuit and backlight control circuit.Signal capturing circuit is to capture timing control signal.It calculates
Circuit corresponds to a plurality of pixel information signals of pixel to receive, and is calculated according to pixel information signal and correspond to backlight area
A plurality of backlight document signals in domain.Backlight control circuit according to timing control signal and backlight document signal output phase to answer
In a plurality of backlight control signals of backlight area, carry out the backlight area of back light member according to backlight control signal luminous.
In some embodiments, wherein counting circuit to judge the pixel information news corresponding to one of backlight area person
The maximum in number, and the backlight document signal for corresponding to this backlight area is calculated according to the maximum in pixel information signal.
In some embodiments, wherein counting circuit the maximum in pixel information signal to be interrogated divided by pixel information
Number pulse width modulation value of the maximum value as backlight document signal.
In some embodiments, it further includes: liquid crystal cell, to receive a plurality of LCD Controllings news for corresponding to pixel
Number, and shown according to LCD Controlling signal.
In this way, just can be according to the input image data for working as former frame, for each display by signal processing method
The display content difference in region generates the backlight control signal of corresponding bright, to improve the fineness and contrast of display.
Detailed description of the invention
Fig. 1 system is painted a kind of schematic diagram of display device according to the section Example of this disclosure.
Fig. 2 system is painted a kind of schematic diagram of back light member according to the section Example of this disclosure.
Fig. 3 system is painted a kind of schematic diagram of backlight area according to the section Example of this disclosure.
Fig. 4 system is painted a kind of schematic diagram of processor according to the section Example of this disclosure.
Fig. 5 system is painted a kind of flow chart of signal processing method according to the section Example of this disclosure.
Fig. 6 system is painted a kind of transition diagram of signal processing method according to the section Example of this disclosure.
Fig. 7 system is painted a kind of test result figure of signal processing method according to the section Example of this disclosure.
Appended drawing reference:
100: display device 120: processor
122: signal capturing circuit 124: counting circuit
126: backlight control circuit 140: liquid crystal cell
160: back light member 180: memory body
500: signal processing method S520, S540, S560, S580: operation
Z11~Zij: backlight area P11~Pmn: pixel
R11~Rmn, G11~Gmn, B11~Bmn: pixel information signal
STV: start signal SYNC: synchronous time pulse signal
DIN: input image signal CS: backlight control signal
610,620,710,720: curve
Specific embodiment
It is hereafter to elaborate for embodiment cooperation institute's accompanying drawings, but described specific embodiment is only to explain this
Case is not used to limit this case, and the description of structure operation is non-to limit its execution sequence, any to be reconfigured by element
Structure, it is produced have and other effects device, be all the range that this disclosure is covered.
Usually have in addition to having and especially indicating in the word (terms) that full piece specification and claim use
Each word using in this area, in the content of announcement herein with the usual meaning in special content.
About its " first " used herein, " second ", " third " ... etc., the meaning of order or cis-position is not especially censured
Think, also non-limiting this announcement, the element described just for the sake of difference with same technique term or operation.
In addition, about its " coupling " used herein or " connection ", can refer to two or multiple element mutually directly put into effect
Body is in electrical contact, or mutually puts into effect indirectly body or in electrical contact, is also referred to as two or multiple element mutual operation or movement.
Please refer to Fig. 1.Fig. 1 system is painted a kind of schematic diagram of display device 100 according to the section Example of this disclosure.
As shown in Figure 1, display device 100 includes processor 120, liquid crystal cell 140, back light member 160 and memory body 180.In structure,
Processor 120 couples liquid crystal cell 140, back light member 160 and memory body 180.In operation, liquid crystal cell 140 is defeated to show
Image out.Back light member 160 is to export backlight.Processor 120 penetrates signal processing side to receive input image signal
Method obtains LCD Controlling signal and backlight control signal CS is controlled with being exported respectively to liquid crystal cell 140 and back light member 160
System.Memory body 180 is to store various data and signal.
Specifically, please referring to Fig. 2 and Fig. 3.Fig. 2 system is painted a kind of backlight member according to the section Example of this disclosure
The schematic diagram of part 160.Fig. 3 system is painted the schematic diagram of backlight area Z11 a kind of according to the section Example of this disclosure.Such as figure
Shown in 2, back light member 160 includes a plurality of backlight area Z11~Zij.Each backlight area corresponds to a plurality of pixels, such as schemes
Shown in 3, backlight area Z11 corresponds to pixel P11~Pij.In other words, display device 100 includes m*n*i*j pixel in total.
Wherein, m, n, i, j are all positive integer, and m is more than or equal to i, and n is more than or equal to j.For example, display device 100 includes 1800*
1200 pixels, back light member 160 include the area 24*16, then each backlight area includes 75*75 pixel.It is noticeable
It is the example of above-mentioned numerical value only for convenience of description, not to limit this case.
In addition, in some embodiments, as shown in figure 3, each pixel is corresponding in each frame input image data DIN
In the pixel information signal comprising three color data.For example, the corresponding pixel information signal of pixel P11 is provided comprising red color
Expect R11, green tint data G11 and blue color data B11.And the corresponding pixel information signal of pixel P12 includes red color
Color data R12, green tint data G12 and blue color data B12.And so on, the corresponding pixel information signal of pixel Pij
Include red color data Rij, green tint data Gij and blue color data Bij.
In some embodiments, display device 100 can be the various devices comprising liquid crystal display panel, such as: mobile phone, plate,
The explicit device of notebook computer, handheld apparatus, desktop, virtual reality (Virtual Reality) device etc..In addition,
In some embodiments, processor 120 can be by various processing circuits, micro-control unit (micro controller), centre
Manage device, microprocessor (microprocessor), digital signals processor (Digital Signal Processor, DSP), spy
Very apply integrated circuit (application specific integrated circuit, ASIC), complexity programmable logic
Element (Complex Programmable Logic Device, CPLD), live programmed lock array (Field-
Programmable gate array, FPGA) or the various mode implementations such as logic circuit.
Please refer to Fig. 4.Fig. 4 system is painted a kind of schematic diagram of processor 120 according to the section Example of this disclosure.Such as
Shown in Fig. 4, processor 120 includes signal capturing circuit 122, counting circuit 124 and backlight control circuit 126.Signal capturing electricity
Road 122 is to receive start signal STV or synchronous time pulse signal SYNC to capture timing control signal.Counting circuit 124 is used
To receive input image signal DIN and calculate backlight document signal according to input image signal DIN.Backlight control circuit 126 is used
To receive timing control signal and backlight document signal, and according to timing control signal and the corresponding back of backlight document signal output
Photocontrol signal CS.
Specifically, please referring to Fig. 5 about signal processing method 500.Fig. 5 system is according to the section Example of this disclosure
It is painted a kind of flow chart of signal processing method 500.Following signal processing methods 500 be cooperation FIG. 1 to FIG. 7 illustrated embodiment into
Row explanation, but not limited to this, any to be familiar with this those skilled in the art, in the spirit and scope for not departing from this case, when can be various to making
It changes and retouches.As shown in figure 5, signal processing method 500 includes operation S520, S540, S560 and S580.
In operation S520, timing control signal is captured by signal capturing circuit 122.Specifically, by signal capturing electricity
Road 122 receives start signal STV, synchronous time pulse signal SYNC or other control the time point that display devices 100 are operated
Signal, and therefrom to capture timing control signal.For example, the water of 122 fechtable display device 100 of signal capturing circuit
Flat or vertical synchronization time pulse signal.
In operation S540, pixel information signal is received by counting circuit 124 and backlight is calculated according to pixel information signal
Document signal.Specifically, receiving input image signal DIN by counting circuit 124.Input image signal DIN includes to correspond to
The pixel information signal of a plurality of pixels (such as color data R11, G11, B11 that pixel P11 is included in Fig. 2).By calculating electricity
Road 124 calculates the backlight document signal for corresponding to a plurality of backlight areas according to pixel information signal.
Furthermore, counting circuit 124 is to judge in the pixel information signal corresponding to one of backlight area person
The maximum, and calculated according to the maximum in pixel information signal corresponding to the backlight document signal in this backlight area.
For example, in some embodiments, as shown in figure 5, including pixel P11~Pij, pixel in backlight area Z11
It all include three color data of red, green, blue in P11~Pij each.One color data of each pixel information signal can be
0~255.For example, (R11, G11, B11) that pixel P11 includes can be (10,189,250).In other words, correspond to backlight area
The pixel information signal of Z11 includes R11~Rij, G11~Gij, B11~Bij.Therefore, counting circuit 124 judges pixel information
Signal R11~Rij, G11~Gij, the maximum in B11~Bij correspond to the backlight data of backlight area Z11 and interrogate to calculate
Number.
Specifically specifically, counting circuit 124 to by the maximum in pixel information signal divided by pixel information signal
Pulse width modulation value (pulse width modulation, PWM) of the maximum value as this backlight document signal.Please refer to figure
6.Fig. 6 system is painted a kind of transition diagram of signal processing method 500 according to the section Example of this disclosure.Such as Fig. 6 institute
Show, curve 610 is when not adjusting backlight document signal, no matter document signal is whichever in 0~255, corresponding pulse width tune
Variate is all 100%.Therefore, when document signal is black picture, back light member still carries out luminous and is stopped by liquid crystal cell.And
In the present embodiment, by curve 620 it is found that document signal and pulse width modulation value are positively correlated.In other words, work as document signal
When the brightness of representative is lower, the backlight that back light member 160 is issued is also darker.That is, back light member 160 corresponds to data
It when signal is low-light level picture, i.e., is shone or is not shone with low-light level, to improve the contrast of display.
For example, in some embodiments, if pixel information signal R11~Rij, G11 corresponding to backlight area Z11
The maximum in~Gij, B11~Bij is 250, then counting circuit 124 calculates and obtains 250/255=98% and be used as corresponding to back
The pulse width modulation value of the backlight document signal of light region Z11.In another example if pixel information corresponding to backlight area Z11
Signal R11~Rij, G11~Gij, the maximum in B11~Bij are 18, then counting circuit 124 calculate and 18/255=8%
Pulse width modulation value as the backlight document signal corresponding to backlight area Z11.
Then, it in operation S560, is exported by backlight control circuit 126 according to timing control signal and backlight document signal
Corresponding backlight control signal CS.Backlight control news are specifically generated according to backlight document signal by backlight control circuit 126
Number CS, and control according to timing control signal the time point of output backlight control signal CS.For example, if backlight document signal
Pulse width modulation value be 50%, then 126 output pulse width modulation value of backlight control circuit be 50% backlight control interrogate
Number CS is to drive back light member 160.In addition, controlling the backlight control of output to back light member 160 according to timing control signal
Signal CS and the kinetic energy of making of liquid crystal cell 140 are mutually arranged in pairs or groups.For example, being opened with controlling in liquid crystal cell 140 according to timing control signal
Begin just to export backlight control signal CS to back light member 160 after rotation to positioning.
Finally, being carried out by back light member 160 according to backlight control signal CS luminous in operation S580.Specifically, back
Optical element 160 receives backlight control signal CS from backlight control circuit 126 and is carried out according to backlight control signal CS luminous.This
Outside, liquid crystal cell 140 receives the LCD Controlling signal corresponding to pixel from processor 120 and is shown according to LCD Controlling signal
Show.
In this way, just can be according to the input image data for working as former frame, for each aobvious by signal processing method 500
Show that the display content difference in region generates the backlight control signal CS of corresponding bright, to improve the fineness and contrast of display.
Please refer to Fig. 7.Fig. 7 system is painted a kind of survey of signal processing method 500 according to the section Example of this disclosure
Test result figure.As shown in fig. 7, curve 710 represents the corresponding relationship of unjustified preceding document signal and pulse width modulation value.
Curve 720 represents the corresponding relationship through 500 document signal adjusted and pulse width modulation value of signal processing method.
It is worth noting that, the process in aforementioned each flow chart executes sequence, only exemplary embodiment, rather than limit to
Actual implementation mode of the invention.Any technical field has usually intellectual, in the spirit and scope for not departing from this case
It is interior, when can be to making various change and retouch.For example, in some embodiments, operation S520 in signal processing method 500 and
The sequence interchangeable of S540 can carry out simultaneously.
Although should be managed in addition, disclosed method is shown and described as a series of step or event herein
The sequence of solution, these shown steps or event should not be construed as limited significance.For example, part steps can be with different order
Occur and/or with other than step or event illustrated herein and/or described other steps or event occur simultaneously.Separately
Outside, when implementing one or more aspects or embodiment described herein, and not all is all required the step of this shows.This
Outside, one or more steps herein may also execute the step of one or more separates and/or in the stage.
It should be noted that in the absence of conflict, in each schema of this disclosure, embodiment and embodiment
Feature can be combined with each other with circuit.Depicted circuit is merely illustrative in schema is used, and is to simplify so that interest of clarity and just
In understanding, not to limit this case.In addition, each device, unit and the element in the various embodiments described above can be by various types of
The numerical digit or analogous circuit of type are realized, can also be realized respectively by different integrated circuit chips, or be integrated into single wafer.It is above-mentioned
It only illustrates, this disclosure is not limited thereto.
In conclusion this case penetrates in the above-mentioned each embodiment of application, by signal processing method 500, according to input shadow
As the brightness corresponding backlight control signal CS of generation of signal DIN (including multiple pixel information signals), corresponding to display picture
Different bright dark areas adjust the pulse width modulation value of its backlight in face, so that high brightness picture is unaffected and ensures low-light level
Picture is opaque, reaches improvement contrast.
Although this disclosure is disclosed above with embodiment, so it is not limited to this disclosure, affiliated skill
Art field have usually intellectual in the spirit and scope for not departing from this disclosure, when can make it is various change and retouch, because
Subject to the protection scope of this this disclosure as defined in claim attached after view.
Claims (8)
1. a kind of signal processing method, characterized by comprising:
One timing control signal is captured by a signal capturing circuit；
A plurality of pixel information signals are received by a counting circuit and are provided according to those pixel information signal calculated complex backlights
Expect signal；
Corresponding a plurality of backlights are exported according to the timing control signal and those backlight document signals by a backlight control circuit
Control signal；And
It is carried out by a back light member according to those backlight control signals luminous.
2. signal processing method as described in claim 1, which is characterized in that one of those backlight document signals person corresponds to
One of a plurality of backlight areas of back light member person corresponds to a plurality of pixels in those backlight areas each, those
One of pixel person corresponds to one of those pixel information signals person, further includes wherein calculating those backlight document signals:
By counting circuit judgement corresponding to the maximum in those pixel information signals of one of those backlight areas person；With
And
It is calculated according to the maximum in those pixel information signals corresponding to the person in those backlight areas by the counting circuit
The backlight document signal.
3. signal processing method as claimed in claim 2, which is characterized in that calculate those backlight document signals and further include:
By the counting circuit using the maximum in those pixel information signals divided by a pixel information signal maximum value as the back
One pulse width modulation value of light document signal.
4. signal processing method as described in claim 1, which is characterized in that export those backlight control signals and further include:
Those backlight control signals are generated according to those backlight document signals by the backlight control circuit；And
The time for exporting those backlight control signals is controlled according to the timing control signal by the backlight control circuit.
5. a kind of display device, characterized by comprising:
One back light member, includes a plurality of backlight areas, those backlight areas respectively correspond a plurality of pixels；And
One processor couples the back light member, includes:
One signal capturing circuit, to capture a timing control signal；
One counting circuit, to receive a plurality of pixel information signals for corresponding to those pixels, and according to those pixel informations
Signal calculates a plurality of backlight document signals for corresponding to those backlight areas；And
One backlight control circuit, to correspond to those backlights according to the timing control signal and the output of those backlight document signals
A plurality of backlight control signals in region, send out those backlight areas of the back light member according to those backlight control signals
Light.
6. display device as claimed in claim 5, which is characterized in that the counting circuit is to judge corresponding to those backlight areas
The maximum in those pixel information signals of one of domain person, and phase is calculated according to the maximum in those pixel information signals
It should be in the backlight document signal of the person in those backlight areas.
7. display device as claimed in claim 6, which is characterized in that the counting circuit is to will be in those pixel information signals
A pulse width modulation value of the maximum divided by a pixel information signal maximum value as the backlight document signal.
8. display device as claimed in claim 5, which is characterized in that further include:
One liquid crystal cell, to receive a plurality of LCD Controlling signals for corresponding to those pixels, and according to those LCD Controllings
Signal is shown.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910716762.4A CN110400544A (en) | 2019-08-05 | 2019-08-05 | Signal processing method and display device |
| TW108128658A TWI732268B (en) | 2019-08-05 | 2019-08-12 | Signal processing method and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910716762.4A CN110400544A (en) | 2019-08-05 | 2019-08-05 | Signal processing method and display device |
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| CN201910716762.4A Pending CN110400544A (en) | 2019-08-05 | 2019-08-05 | Signal processing method and display device |
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| TW (1) | TWI732268B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW202107162A (en) | 2021-02-16 |
| TWI732268B (en) | 2021-07-01 |
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Application publication date: 20191101 |