CN114282564A - Electronic equipment - Google Patents
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- CN114282564A CN114282564A CN202011284128.7A CN202011284128A CN114282564A CN 114282564 A CN114282564 A CN 114282564A CN 202011284128 A CN202011284128 A CN 202011284128A CN 114282564 A CN114282564 A CN 114282564A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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Abstract
The application is applicable to the technical field of optics and electronics, and provides an electronic device, which comprises: the display device is used for displaying a picture and is provided with a sensing area used for sensing an external object; the emission unit is used for emitting sensing light through the display device to irradiate the part of the external object in the sensing area for sensing, and the illuminance of the sensing light on the external object in at least part of the sensing area is non-uniformly distributed; and a receiving unit for receiving the sensing light returned by the external object to obtain fingerprint information of the external object.
Description
The application is applied to the application with the date of 2020, 1 and 3, and the application number: 202010006667.8 entitled "sensor Module, display device, and electronic apparatus".
Technical Field
The application belongs to the technical field of optics, especially relates to an electronic equipment.
Background
The existing electronic equipment often needs to set a functional module on a main viewing surface in order to realize multiple functions, for example: set up the fingerprint identification module in order to adopt the fingerprint identification function to open electronic equipment on its main face of looking. However, these functional modules are usually required to be separately disposed outside the display area of the electronic device, so as to occupy the display area of the electronic device, which affects the overall appearance of the main viewing surface of the electronic device.
Disclosure of Invention
The present application provides an electronic device to solve the above technical problem.
An embodiment of the present application provides an electronic device, which includes:
the display device is used for displaying a picture and is provided with a sensing area used for sensing an external object;
the emission unit is used for emitting sensing light through the display device to irradiate the part of the external object in the sensing area for sensing, and the illuminance of the sensing light in at least part of the sensing area is non-uniformly distributed; and
and the receiving unit is used for receiving the sensing light returned by the external object so as to obtain the fingerprint information of the external object.
In some embodiments, the non-uniform distribution of illuminance refers to a difference of illuminance of more than 30% in a range of 7-10 microns in average interval.
In some embodiments, the ratio of the area of the region formed by the emission unit on the sensing region and having non-uniform illuminance distribution to the total area of the sensing region is equal to or greater than one third.
In some embodiments, the emission unit comprises one or more light emitting elements symmetrically distributed about a center of the sensing region; or
The light emitting elements are distributed asymmetrically about the center of the sensing region.
In some embodiments, the proportion of the area of the mutually overlapped portions of the light emitting elements symmetrically distributed about the center of the sensing region forming the respectively formed illumination regions in the sensing region to the total area of the sensing region should be less than two thirds.
In some embodiments, all the light emitting elements on the emitting unit emit sensing light to the sensing region at the same time; or
The emitting unit divides one or more light-emitting elements into different combinations, the light-emitting elements belonging to the same combination simultaneously emit sensing light to the sensing area, and the light-emitting elements of the different combinations separately emit the sensing light to the sensing area in different time periods.
In some embodiments, the emission unit includes a first light emitting element group and a second light emitting element group, the first light emitting element group and the second light emitting element group respectively include two pairs of four light emitting elements, the two pairs of light emitting elements of each light emitting element group are symmetrically arranged about a center of the sensing region, the first light emitting element group is closer to the center of the sensing region, the second light emitting element group is farther from the center of the sensing region, and the first light emitting element group and the second light emitting element group respectively emit sensing light to the sensing region in different periods when sensing is performed.
In some embodiments, two illumination regions respectively formed by two pairs of light emitting elements symmetrically distributed about the center of the sensing region in the first light emitting element group do not overlap with each other within the sensing region.
In some embodiments, the emission unit includes a plurality of pairs of first light emitting elements symmetrically distributed about a center of the sensing region along the first direction and a plurality of pairs of second light emitting elements symmetrically distributed about the center of the sensing region along the second direction, the first and second light emitting elements being divided into a first light emitting element group and a second light emitting element group that illuminate within different periods, the first light emitting element group including a pair of first light emitting elements closer to the sensing region and a pair of second light emitting elements farther from the sensing region, the second light emitting element group including a pair of first light emitting elements farther from the sensing region and a pair of first light emitting elements closer to the sensing region.
In some embodiments, the display device further includes a receiving unit, the receiving unit receives the sensing light reflected by the external object through the display device for sensing, and the receiving unit combines a plurality of images respectively formed by receiving the sensing light in corresponding different periods into one image to extract feature points for comparison and identification; or
The receiving unit respectively analyzes a plurality of images formed by receiving the sensing light rays in different periods so as to extract corresponding characteristic points from each image for comparison and identification.
In some embodiments, the light emitting elements are disposed on the same plane; or
The light emitting elements are disposed on the same horizontal plane.
In some embodiments, the emitting unit includes an emitting substrate and one or more light emitting elements disposed on the emitting substrate, and further includes a receiving unit, the receiving unit receives the sensing light reflected by the external object through the display device for sensing, the receiving unit includes a receiving substrate, and a lens and an image sensor disposed on the receiving substrate, the emitting substrate is provided with a light transmitting through hole corresponding to the receiving unit, and the sensing light reflected by the external object is received by the receiving unit through the light transmitting through hole for sensing.
In some embodiments, the portable electronic device further includes a base and a receiving unit, the receiving unit receives the sensing light reflected by the external object through the display device for sensing, the emitting unit and the receiving unit are both disposed on the base, the base is provided with an accommodating space for accommodating the receiving unit, the accommodating space is provided with a light entrance opening on a side surface of the base facing the sensing region, the receiving unit receives the sensing light through the light entrance opening, and the emitting unit is disposed on a surface of the base on which the light entrance opening is formed.
In some embodiments, the display device includes a display panel and a backlight module.
In some embodiments, the light emitting surface of the emitting unit is closely attached to the bottom of the display device to emit the sensing light to the sensing region.
The present disclosure provides a sensing module disposed under a display device, the display device having a sensing region for sensing an external object. The sensing module comprises a transmitting unit and a receiving unit. The emission unit emits sensing light through the display device to irradiate the part of the external object in the sensing region. The illuminance of the sensing light formed in at least partial area of the sensing area is non-uniformly distributed. The receiving unit receives sensing light reflected by the external object through the display device for sensing.
The embodiment of the application can transmit and/or receive sensing light to realize the sensing function in the display area of the display device by arranging the base used for bearing the transmitting unit and the receiving unit below the display device, does not need to occupy the area of the display area of the electronic equipment, is favorable for improving the screen occupation ratio of the electronic equipment, and improves the overall impression of the main viewing surface of the electronic equipment. In addition, the sensing module forms a region with non-uniform illuminance distribution in the sensing region by reasonably setting the light emitting region and the light emitting period of the light emitting element, so that luminous fluxes of sensing light reflected back by different parts on an external object have obvious differences, a high-contrast clear light and dark image can be formed, and the sensing accuracy is improved.
Additional aspects and advantages of embodiments of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the present application.
Drawings
Fig. 1 is a schematic front view of an electronic device provided in an embodiment of the present application, where the electronic device includes a sensing module located below a display device.
Fig. 2 is a schematic structural diagram of the display device and the sensing module in fig. 1.
Fig. 3 is a schematic diagram of the variation of the light emitting intensity of the light emitting element of the sensing module in fig. 2 with the light emitting angle.
Fig. 4 is a schematic diagram of illuminance distribution of the light emitting elements of the sensor module shown in fig. 2 in the overlapped irradiation area.
Fig. 5 is a schematic arrangement diagram of the light emitting elements according to the embodiment of the present application.
Fig. 6 is a schematic view of the illuminance distribution of the light emitting device in the sensing region in fig. 5.
Fig. 7 is a schematic arrangement diagram of the light emitting elements according to a modified embodiment of the present application.
Fig. 8 is a schematic arrangement diagram of the light emitting elements according to a modified embodiment of the present application.
Fig. 9 is a schematic structural diagram of the sensor module according to a modified embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any order or number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; either mechanically or electrically or in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship or combination of two or more elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different structures of the application. In order to simplify the disclosure of the present application, only the components and settings of a specific example are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repeat use is intended to provide a simplified and clear description of the present application and is not intended to suggest any particular relationship between the various embodiments and/or arrangements discussed. In addition, the various specific processes and materials provided in the following description of the present application are only examples of implementing the technical solutions of the present application, but one of ordinary skill in the art should recognize that the technical solutions of the present application can also be implemented by other processes and/or other materials not described below.
Further, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject technology can be practiced without one or more of the specific details, or with other structures, components, and so forth. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the focus of the application.
Referring to fig. 1 and fig. 2 together, one embodiment of the present application provides an electronic device 1, for example: mobile phones, notebook computers, tablet computers, touch interactive screens, doors, vehicles, robots, automatic numerical control machines, and the like. The electronic device 1 includes a display device 10 and a sensing module 12 disposed below the display device 10. The electronic device 1 is configured to correspondingly execute a corresponding function according to a sensing result of the sensing module 12. The corresponding functions include but are not limited to unlocking, paying, starting a preset application program after identifying the identity of the user, or acquiring body function parameters such as heart rate and blood oxygen content of the user to judge any one or more combinations of the emotion and the health condition of the user.
The display device 10 includes a display panel 102 and a backlight module 104. The backlight module 104 is disposed below the display panel 102 and configured to provide backlight light to the display panel 102. The sensing module 12 is disposed below the backlight module 104. The sensing module 12 can emit and/or receive sensing light through the backlight module 104 and the display panel 102 of the display device 10. The sensing light emitted from the sensing module 12 irradiates an external object through the backlight module 104 and the display panel 102 for sensing. The sensing light is received by the sensing module 12 through the display panel 102 and the backlight module 104 after returning through the external object. In this embodiment, the sensing light may carry the biometric information of the external object after returning through the external object, such as: the external object is a finger of a user, and the biometric information is fingerprint information of the user. The sensing module 12 is, for example, a fingerprint recognition module, and can acquire fingerprint information of a finger of a user by sensing light returned by the finger for recognition. Here, the sensing light returning from the finger may be the sensing light reflected from the surface of the finger with the fingerprint pattern, or the sensing light entering the inside of the finger and then being emitted from the surface of the finger with the fingerprint pattern through diffuse reflection and propagation to return.
It is understood that, in other modified embodiments, the sensing light may not carry the biometric information of the external object, and may be directly used for sensing the approach of the external object. For example: the sensing module 12 senses that the sensing light exceeding the preset threshold returns, and then it is considered that an external object is close to the electronic device 1.
A sensing region 105 is defined in the display region 103 of the display panel 102. The sensing light returns to the sensing module 12 for sensing through the portion of the external object located in the sensing region 105. It is understood that the electronic device may further include a cover (not shown), and the external object touches a position of the cover corresponding to the sensing region 105 to reflect the sensing light to the sensing module 12.
The sensing module 12 is disposed below the backlight module 104 and corresponding to the sensing region 105. The sensing module 12 includes a transmitting unit 122 and a receiving unit 124. The emitting unit 122 emits the sensing light to an external object through the display device 10. The receiving unit 124 receives the sensing light reflected by the external object through the display device 10 for sensing. In this embodiment, the sensing light is used for sensing a fingerprint. The sensing light may be infrared or near infrared wavelength light, and the wavelength range is 750 nm (Nanometer) to 2000 nm.
The emission unit 122 includes one or more light emitting elements 120. The light emitting element 120 is used for emitting sensing light to the sensing region 105. The Light Emitting element 120 may be a Light Emitting Diode (LED). The receiving unit 124 includes a lens 126 and an image sensor 127. The lens 126 images the reflected sensing light in focus on the image sensor 127 for sensing.
It is understood that, in other modified embodiments, the light emitting element 120 may also be other types of light sources, such as: an Organic Light Emitting Diode (OLED), a Vertical Cavity Surface Emitting Laser (VCSEL), a Laser Diode (LD), and any other suitable Light Emitting device. The receiving unit 124 may omit the lens 126, and directly perform imaging on the image sensor 127 by using the pinhole imaging principle. Alternatively, the receiving unit 124 does not need to image when proximity sensing is performed, and the receiving unit 124 may use a Photodiode (PD) instead of the image sensor 127 for sensing.
The external object is exemplified by a finger, on which a fingerprint comprises valleys and ridges. The illuminance of the sensing light on the finger surface in at least a partial area of the sensing region 105 is non-uniformly distributed, so that the illuminance of the sensing light respectively on the protruding ridges and the recessed valleys on the fingerprint is different, and the intensity of the sensing light reflected by the valleys and the ridges back to be received by the receiving unit 124 is obviously different. The receiving unit 124 can form clear light and dark stripes with high contrast corresponding to the valleys and ridges on the fingerprint, which is beneficial to subsequent fingerprint comparison and identification. In order to form a relatively clear stripe pattern of valleys and ridges, the difference of the illuminance of the sensing light irradiating the positions of the valleys and the ridges is more than 30%. The spacing between adjacent valleys and ridges on the fingerprint is in the range of 7-10 microns. Thus, the non-uniform distribution of the light intensity of the sensing light on the finger surface in at least a partial area of the sensing region 105 means that the difference of the light intensity on the adjacent valleys and ridges of the finger surface is greater than 30%, i.e. the difference of the light intensity is greater than 30% in the range of 7-10 microns apart on average.
The receiving unit 124 needs to acquire enough clear fingerprint images in the sensing region 105 for effective identification, so that the proportion of the area of the sensing region 105, in which the illuminance of the light emitting elements 120 on the emitting unit 122 is non-uniformly distributed, to the total area of the sensing region 105 needs to be equal to or greater than one third.
The one or more light emitting elements 120 on the emitting unit 122 may be simultaneously turned on to illuminate, or one or more of the light emitting elements 120 may be divided into different combinations, the light emitting elements 120 belonging to the same combination simultaneously emit sensing light to the sensing region 105, and the light emitting elements 120 of different combinations separately emit the sensing light to the sensing region 105 in different time periods. It is understood that, when a plurality of light emitting devices 120 simultaneously emit sensing light to illuminate the sensing region 105, the illumination intensity of the sensing light illuminating the sensing region 105 should be the sum of the illumination intensities of the plurality of light emitting devices 120 simultaneously illuminating the sensing region 105.
In fig. 2, different line shapes are used to schematically represent the illuminated sensing light respectively illuminated in different time periods, such as: the sensing light emitted by the first light emitting element group 120 is indicated by a solid line, and the sensing light emitted by the second light emitting element group 120 is indicated by a dotted line.
In the case that different combinations of the light emitting elements 120 respectively illuminate in different time periods, the receiving unit 124 can combine a plurality of images respectively formed by receiving the sensing light in corresponding different time periods into one image to extract feature points for comparison and identification. The receiving unit 124 may also analyze a plurality of images formed by receiving the sensing light in different periods to extract feature points from each image for comparison and identification.
It is understood that, in other modified embodiments, the receiving unit 124 may also perform other processing on the received sensing light to finally implement the function of comparison and identification, which is not limited herein.
The illuminance of the sensing light in the sensing region 105 may be the illuminance of the single light emitting element 120 on the emitting unit 122, or the sum of the illuminance of the multiple light emitting elements 120 lit in the same time period on the emitting unit 122.
The light emitting elements 120 on the emission unit 122 may be asymmetrically distributed about the center of the sensing region 105. The light emitting elements 120 on the emission unit 122 may also be distributed symmetrically about the center of the sensing region 105, including but not limited to rotational symmetry and central symmetry.
As shown in fig. 3, the light-emitting intensity of the sensing light emitted by the light-emitting element 120 varies with the light-emitting angle and has a predetermined light-emitting angle range, and the light emitted by the light-emitting element 120 along the direction of the maximum light-emitting intensity is defined as a principal light, and the light at the outermost boundary of the light-emitting angle range is defined as a boundary light. In this embodiment, the light emitting element 120 is an LED light source that emits infrared or near-infrared light. The light emitting angle range of the light emitting element 120 is 120 degrees. The light emitting element 120 emits light from the center in a vertical direction with the maximum light emitting intensity, and the light emitting intensity gradually decreases with increasing angle from the center in the light emitting angle range. Therefore, the light emitted from the light emitting element 120 in the vertical direction from the center is defined as a principal ray, and the light with the light emitting angle of 120 degrees is defined as a boundary ray. It is understood that in other alternative embodiments, the light emitting intensity of the light emitting element 120 may have other different distribution forms. Alternatively, the light emitting intensity distribution of the emitted light can be changed into various forms according to actual requirements by disposing a lens structure at the light emitting surface of the light emitting element 120.
As can be seen from the light intensity distribution characteristics of the light emitting elements 120, as shown in fig. 4, when the illumination areas formed by the light emitting elements 120 in the sensing area 105 are overlapped, the illuminance of the illumination areas is compensated to make the overall illuminance of the overlapped portion uniform, and the illuminance of the non-overlapped portion is still gradually changed along with the illumination angle. Therefore, the ratio of the area of the mutually overlapped portions of the illumination regions formed by the light emitting devices 120 symmetrically distributed about the center of the sensing region 105 in the sensing region 105 to the total area of the sensing region 105 should be less than two-thirds, so as to satisfy the requirement that the ratio of the area of the region with non-uniform illuminance distribution formed by the light emitting devices 120 on the sensing region 105 to the total area of the sensing region 105 is equal to or greater than one third.
The light emitting elements 120 symmetrically distributed about the center of the sensing region 105 may be divided into different combinations according to a predetermined rule. For example: the symmetrically distributed light emitting elements 120 having the same distance from the center of the sensing region 105 are divided into the same combination. When sensing is performed, the symmetrically distributed light emitting elements 120 belonging to the same combination are lit for illumination in the same period, and the light emitting elements 120 belonging to different combinations are lit for illumination in different periods, respectively. It is understood that the light emitting elements 120 of different combinations may be turned on for illumination at the same time period, on the premise that the illumination non-uniform distribution area formed in the sensing region 105 by each illumination occupies at least one third of the total area of the sensing region 105. It is to be understood that, in other modified embodiments, the light emitting elements 120 may be divided and combined according to other principles, which is not limited in the present application.
In this embodiment, as shown in fig. 5, the emission unit 122 includes two groups of light emitting elements 120, which are respectively a first light emitting element group 1201 and a second light emitting element group 1202, and are symmetrically arranged about the center of the sensing region 105. The first group of light emitting elements 1201 is closer to the center of the sensing region 105. The second light emitting element group 1202 is farther from the center of the sensing region 105. Each group includes four light emitting elements 120, and each two light emitting elements 120 are used as a pair of minimum symmetrical arrangement units to be arranged symmetrically with respect to the center of the sensing region 105. The two pairs of light emitting elements 120 of the second light emitting element group 1202 are respectively located at the outer side of the first light emitting element group 1201 farthest from the sensing region 105, and are arranged along the symmetrical arrangement direction of the first light emitting element group 1201. That is, the midpoint of the connecting line of the pair of light emitting elements 120 as the symmetrical arrangement unit in the second light emitting element group 1202 and the midpoint of the connecting line of the pair of light emitting elements 120 as the symmetrical arrangement unit in the first light emitting element group 1201 are located on the same straight line.
As shown in fig. 6, two pairs of light emitting devices 120 symmetrically distributed about the center of the sensing region 105 in the first light emitting device group 1201 respectively form two illumination areas within the sensing region 105, which are not overlapped with each other, and the two illumination areas may be separated by a predetermined distance or have their boundaries tangent to each other.
Referring to fig. 5 and fig. 6, in sensing, the first light emitting element group 1201 and the second light emitting element group 1202 respectively irradiate in different time periods. The receiving unit 124 receives the sensing light reflected by the external object in the illumination period of the first light emitting element group 120 to form a corresponding first sensing image. The receiving unit 124 receives the sensing light reflected by the external object in the illumination period of the second light emitting element group 120 to form a corresponding second sensing image. And respectively analyzing the first sensing image and the second sensing image to extract characteristic points for comparison and identification.
In another modified embodiment, as shown in fig. 7, the emitting unit 122 includes a first light emitting element 1203 symmetrically distributed about the center of the sensing region 105 along the first direction I and a second light emitting element 1204 symmetrically distributed about the center of the sensing region 105 along the second direction II. The first light emitting elements 1203 are four in number, and include a pair of light emitting elements 120 that are closer to the sensing region 105 and symmetrically distributed about the center of the sensing region 105, and a pair of light emitting elements 120 that are farther from the sensing region 105 and symmetrically distributed about the center of the sensing region 105. There are also four second light emitting elements 1204, including a pair of symmetrically distributed light emitting elements 120 about the center of the sensing region 105 that are closer to the sensing region 105 and a pair of symmetrically distributed light emitting elements 120 about the center of the sensing region 105 that are farther from the sensing region 105. The first direction I is perpendicular or substantially perpendicular to the second direction II.
The first light emitting element 1203 and the second light emitting element 1204 are divided into different combinations including a first light emitting element group 1201 and a second light emitting element group 1202. The first light emitting element group 1201 includes a pair of first light emitting elements 1203 near the sensing region 105 and a pair of second light emitting elements 1204 far from the sensing region 105. The second light emitting element group 1202 includes a pair of first light emitting elements 120 farther from the sensing region 105 and a pair of first light emitting elements 120 closer to the sensing region 105. When sensing is performed, the first light emitting element group 120 and the second light emitting element group 120 are irradiated in different periods of time, respectively. The receiving unit 124 receives the sensing light reflected by the external object in the illumination period of the first light emitting element group 120 to form a corresponding first sensing image. The receiving unit 124 receives the sensing light reflected by the external object in the illumination period of the second light emitting element group 120 to form a corresponding second sensing image. And respectively analyzing the first sensing image and the second sensing image to extract characteristic points for comparison and identification.
In other variations, as shown in fig. 8, the emitting unit 122 includes three light emitting elements 120 distributed asymmetrically with respect to the center of the sensing region 105. The distance between each light emitting element 120 and the center of the sensing region 105 may be the same or different. In sensing, the light emitting elements 120 may be simultaneously turned on for illumination, or may be turned on for illumination at different time intervals. The receiving unit 124 may form corresponding sensing patterns in different illumination periods, respectively, for extracting feature points for comparison and identification.
As shown in fig. 2, the emission unit 122 may further include an emission substrate 121. The light emitting element 120 is disposed on the emission substrate 121. The emitting substrate 121 may be a rigid circuit board or a composite circuit board formed by attaching a reinforcing plate 125 to a flexible circuit board 123. The emission substrate 121 is provided with a light-transmitting through hole 129. The receiving unit 124 is disposed below the emitting substrate 121, and the sensing light reflected by the external object and returned passes through the light-transmitting through hole 129 and is received by the receiving unit 124 for sensing. The receiving unit 124 may further include a receiving substrate 128. The lens 126 and the image sensor 127 are disposed on the receiving substrate 128.
The emitting unit 122 is disposed below the backlight module 104 and at a position corresponding to the sensing region 105. In this embodiment, the light emitting surface of the light emitting element 120 is closely attached to the bottom of the backlight module 104, so that the emitted sensing light can directly transmit through the backlight module 104 and emit upward, thereby reducing the influence on sensing caused by the sensing light directly reflected by the bottom of the backlight module 104 after being received by the receiving unit 124.
In this embodiment, the receiving unit 124 is used to receive an optical center of the sensing light, such as: the center of the imaging optical path of the lens 126 is aligned or substantially aligned with the center of the sensing region 105. The center of the light-transmissive through hole 129 is also aligned or substantially aligned with the center of the sensing region 105. Correspondingly, the light emitting elements 120 symmetrically distributed about the center of the sensing region 105 are also symmetrically distributed about the optical center of the receiving unit 124 and the center of the light transmitting through hole 129. It is understood that in other modified embodiments, the optical center of the receiving unit 124 and/or the center of the light-transmitting through hole 129 may not be aligned with the center of the sensing region 105, and the receiving unit 124 and the light-transmitting through hole 129 may be disposed at positions such that the receiving unit 124 can receive enough sensing light reflected by an external object in the sensing region 105 to achieve the required sensing function. For example: the angular range of the field of view of the receiving unit 124 is large enough so that the optical center of the receiving unit 124 can receive the sensing light reflected back within the entire sensing region 105 even if not aligned with the center of the sensing region 105, or can receive the sensing light with non-uniform distribution of illuminance reflected back by at least one third of the sensing regions 105.
In another modified embodiment, as shown in fig. 9, the light emitting element 120 of the emitting unit 122, the lens 126 of the receiving unit 124, and the image sensor 127 may be provided on the same base 16. The base 16 is provided with a receiving space 162, such as a through hole or a groove. The accommodating space 162 forms a light inlet opening 164 on a side surface of the base 16 facing the sensing region 105. The lens 126 and/or the image sensor 127 are disposed in the accommodating space 162 to receive the sensing light through an entrance opening 164 formed in the accommodating space 162. The light emitting elements 120 are disposed on a side surface of the base 16 where the light inlet opening 164 is opened, and the light emitting elements 120 may be disposed around the light inlet opening 164 according to a predetermined arrangement manner in the above embodiment.
In the above embodiments, the light emitting elements 120 are all disposed on the same plane or on the substantially same horizontal plane. It is understood that, in other modified embodiments, the light emitting elements 120 may be located on different planes, which is not limited in the present application.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the present application, and any modifications, equivalents and improvements made within the spirit and principle of the present application are intended to be included within the scope of the present application.
Claims (11)
1. An electronic device, comprising:
the display device is used for displaying a picture and is provided with a sensing area used for sensing an external object;
the emission unit is used for emitting sensing light through the display device to irradiate the part of the external object in the sensing area for sensing, and the illuminance of the sensing light on the external object in at least part of the sensing area is non-uniformly distributed; and
and the receiving unit is used for receiving the sensing light returned by the external object so as to obtain the fingerprint information of the external object.
2. The electronic device of claim 1, wherein: the illuminance is non-uniformly distributed, which means that the difference of the illuminance is more than 30% in the range of average interval 7-10 microns.
3. The electronic device of claim 1, wherein: the proportion of the area with non-uniform illuminance distribution formed on the sensing area by the emission unit to the total area of the sensing area is equal to or more than one third.
4. The electronic device of claim 1, wherein the emission unit comprises one or more light emitting elements symmetrically distributed about a center of the sensing region; or
The light emitting elements are distributed asymmetrically about the center of the sensing region.
5. The electronic device of claim 4, wherein the light emitting elements symmetrically distributed about the center of the sensing region form mutually overlapping portions of the illumination regions respectively formed within the sensing region, and the ratio of the area of the mutually overlapping portions to the total area of the sensing region is less than two-thirds.
6. The electronic device of claim 4, wherein all of the light emitting elements on the emitting unit emit sensing light to the sensing region simultaneously; or
The emitting unit divides one or more light-emitting elements into different combinations, the light-emitting elements belonging to the same combination simultaneously emit sensing light to the sensing area, and the light-emitting elements of the different combinations separately emit the sensing light to the sensing area in different time periods.
7. The electronic device according to claim 6, wherein the emission unit includes a first light emitting element group and a second light emitting element group, the first light emitting element group and the second light emitting element group respectively include four light emitting elements in two pairs, the two pairs of light emitting elements of each light emitting element group are symmetrically arranged with respect to a center of the sensing region, the first light emitting element group is closer to the center of the sensing region, the second light emitting element group is farther from the center of the sensing region, and the first light emitting element group and the second light emitting element group respectively emit the sensing light to the sensing region during different periods of time during sensing.
8. The electronic device of claim 7, wherein: two irradiation regions respectively formed by two pairs of light emitting elements symmetrically distributed about the center of the sensing region in the first light emitting element group are not overlapped with each other in the sensing region.
9. The electronic device of claim 6, wherein: the emission unit comprises a plurality of pairs of first light-emitting elements symmetrically distributed along a first direction with respect to the center of the sensing region and a plurality of pairs of second light-emitting elements symmetrically distributed along a second direction with respect to the center of the sensing region, the first and second light-emitting elements are divided into a first light-emitting element group and a second light-emitting element group which irradiate in different periods, the first light-emitting element group comprises a pair of first light-emitting elements closer to the sensing region and a pair of second light-emitting elements farther from the sensing region, and the second light-emitting element group comprises a pair of first light-emitting elements farther from the sensing region and a pair of first light-emitting elements closer to the sensing region.
10. The electronic device of claim 6, wherein: the receiving unit receives sensing light reflected by the external object through the display device for sensing, and combines a plurality of images respectively formed by receiving the sensing light in corresponding different periods into one image to extract characteristic points for comparison and identification; or
The receiving unit respectively analyzes a plurality of images formed by receiving the sensing light rays in different periods so as to extract corresponding characteristic points from each image for comparison and identification.
11. The electronic device of claim 4, wherein: the light-emitting elements are arranged on the same plane; or
The light emitting elements are disposed on the same horizontal plane.
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| CN201910273306 | 2019-04-04 | ||
| CN2019102733067 | 2019-04-04 | ||
| CN202010006667.8A CN111797666A (en) | 2019-04-04 | 2020-01-03 | Sensing module, display device and electronic equipment |
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| CN202010006667.8A Division CN111797666A (en) | 2019-04-04 | 2020-01-03 | Sensing module, display device and electronic equipment |
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| CN202011284128.7A Pending CN114282564A (en) | 2019-04-04 | 2020-01-03 | Electronic equipment |
| CN202020021236.4U Active CN211124078U (en) | 2019-04-04 | 2020-01-03 | Sensing module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111797666A (en) * | 2019-04-04 | 2020-10-20 | 深圳阜时科技有限公司 | Sensing module, display device and electronic equipment |
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| CN1491367A (en) * | 2001-10-02 | 2004-04-21 | ���µ�����ҵ��ʽ���� | Image sensing apparatus |
| US20070139781A1 (en) * | 2005-12-15 | 2007-06-21 | Fujifilm Corporation | Optical film, and polarizing plate, image display device and liquid crystal display device including the same |
| CN107145868A (en) * | 2017-05-09 | 2017-09-08 | 上海箩箕技术有限公司 | Display module |
| CN107463893A (en) * | 2017-07-28 | 2017-12-12 | 广东欧珀移动通信有限公司 | Iris identification method and mobile terminal |
| CN108256409A (en) * | 2017-10-27 | 2018-07-06 | 京东方科技集团股份有限公司 | Display device and its fingerprint identification method |
| CN207558065U (en) * | 2017-12-12 | 2018-06-29 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition module and fingerprint identification door lock |
| CN109496314B (en) * | 2018-10-15 | 2021-11-05 | 深圳市汇顶科技股份有限公司 | Fingerprint recognition device and electronic equipment under screen |
| CN111797666A (en) * | 2019-04-04 | 2020-10-20 | 深圳阜时科技有限公司 | Sensing module, display device and electronic equipment |
| CN111026295B (en) * | 2019-04-23 | 2023-08-18 | 深圳阜时科技有限公司 | Sensing module and electronic equipment |
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- 2020-01-03 CN CN202010006667.8A patent/CN111797666A/en not_active Withdrawn
- 2020-01-03 CN CN202011284128.7A patent/CN114282564A/en active Pending
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| CN111797666A (en) * | 2019-04-04 | 2020-10-20 | 深圳阜时科技有限公司 | Sensing module, display device and electronic equipment |
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| CN111797666A (en) | 2020-10-20 |
| CN211124078U (en) | 2020-07-28 |
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