阅读说明：本技术 显示屏组件及电子设备 (Display screen assembly and electronic equipment ) 是由 吴安平 杨乐 于 2019-02-01 设计创作，主要内容包括：本申请实施例提供一种显示屏组件及电子设备。所述显示屏组件包括显示面板、光学传感器及控制器,所述显示面板具有指纹识别区,所述指纹识别区包括中心区和环绕所述中心区的边缘区,所述光学传感器对应所述指纹识别区设置,所述光学传感器用于采集目标对象的指纹图像,所述光学传感器具有若干个感光单元,所述控制器控制所述边缘区对应的感光单元的性能参数优于中心区对应的感光单元的性能参数。本申请实施例提供的显示屏组件有助于提高采集到的指纹图像的清晰度,进而提升指纹识别的灵敏度。(The embodiment of the application provides a display screen assembly and electronic equipment. The display screen subassembly includes display panel, optical sensor and controller, display panel has the fingerprint identification district, the fingerprint identification district is including the center district and encircle the marginal zone of center district, optical sensor corresponds the setting of fingerprint identification district, optical sensor is used for gathering the fingerprint image of target object, optical sensor has a plurality of sensitization unit, the controller control the performance parameter of the sensitization unit that the marginal zone corresponds is superior to the performance parameter of the sensitization unit that the center corresponds. The display screen assembly provided by the embodiment of the application is beneficial to improving the definition of the collected fingerprint image, and further improves the sensitivity of fingerprint identification.)

1. The utility model provides a display screen subassembly, its characterized in that, the display screen subassembly includes display panel, optical sensor and controller, display panel has the fingerprint identification district, the fingerprint identification district is including the center district and encircle the marginal zone of center district, optical sensor corresponds the setting of fingerprint identification district, optical sensor is used for gathering the fingerprint image of target object, optical sensor has a plurality of sensitization unit, the controller control the performance parameter of the sensitization unit that the marginal zone corresponds is superior to the performance parameter of the sensitization unit that the center corresponds.

2. The display screen assembly of claim 1, wherein the controller controls a gain of the light sensing unit corresponding to the edge region to be greater than a gain of the light sensing unit corresponding to the central region.

3. The display panel assembly of claim 1, wherein the plurality of photosensitive cells form a first photosensitive cell group and a second photosensitive cell group, the first photosensitive cell group is disposed corresponding to the central region, the second photosensitive cell group is disposed corresponding to the edge region, the controller controls the gain of the first photosensitive cell group to gradually decrease from the central region toward the edge region, and controls the gain of the second photosensitive cell group to gradually decrease from the central region toward the edge region, wherein the gain of the photosensitive cells in the first photosensitive cell group is smaller than the gain of the photosensitive cells in the second photosensitive cell group.

4. The display screen assembly of claim 1, further comprising a filtering unit and an amplifying unit, wherein the light sensing unit is configured to emit a detection signal, the filtering unit is configured to filter out clutter in the detection signal, and the amplifying unit is configured to amplify an amplitude of the detection signal from which the clutter is filtered out.

5. The screen assembly of claim 1 or 2, wherein the controller controls the exposure time period of the light sensing unit corresponding to the edge region to be longer than the exposure time period of the light sensing unit corresponding to the central region.

6. The display screen assembly of claim 1, wherein the controller adjusts the exposure duration and the gain of the photo-sensing units corresponding to the edge regions to obtain a first parameter, and the controller adjusts the exposure duration and the gain of the photo-sensing units corresponding to the central region to obtain a second parameter, the photo-sensing units corresponding to the edge regions obtain a first image under the condition of the first parameter, and if the photo-sensing units corresponding to the edge regions obtain a second image under the condition of the second parameter, the sharpness of the first image is greater than the sharpness of the second image.

7. The screen assembly of claim 1, wherein the controller adjusts the light sensing unit to a target brightness and records an adjustment time for adjusting the light sensing unit to the target brightness, the adjustment time being used as a reference, the controller adjusting an exposure duration of the light sensing unit based on the adjustment time when the light sensing unit needs to be turned on next time.

8. The screen assembly of claim 1, further comprising a detector that generates a feedback signal when the detector detects that the target photosensitive unit in the optical sensor is damaged, wherein the controller controls an exposure duration of the first photosensitive unit adjacent to the target photosensitive unit to be longer than a first preset duration according to the feedback signal, wherein the first preset duration is an exposure duration of the first photosensitive unit when the target photosensitive unit is not damaged.

9. The display screen assembly of claim 8, wherein the photosensitive unit further includes a second photosensitive unit, the second photosensitive unit is disposed adjacent to the target photosensitive unit, and the first photosensitive unit is disposed adjacent to a center of the optical sensor relative to the second photosensitive unit, the controller further controlling an exposure duration of the second photosensitive unit to be greater than a second preset duration, wherein the first preset duration is less than the second preset duration, and the second preset duration is an exposure duration of the second photosensitive unit when the target photosensitive unit is not damaged.

10. The display screen assembly of claim 1, wherein the photosensitive unit comprises a target photosensitive unit, a first photosensitive unit and a second photosensitive unit, the first photosensitive unit and the second photosensitive unit are both disposed adjacent to the target photosensitive unit, and when the target photosensitive unit is damaged, the controller fits the fingerprint patterns of the target object acquired by the first photosensitive unit and the second photosensitive unit to obtain the fingerprint patterns corresponding to the target photosensitive unit.

11. The utility model provides a display screen subassembly, its characterized in that, the display screen subassembly includes display panel and optical sensor, display panel has the fingerprint identification district, the fingerprint identification district is including the center district and encircle the marginal zone of center district, optical sensor corresponds the setting of fingerprint identification district, optical sensor is used for gathering the fingerprint image of target object, optical sensor has a plurality of sensitization unit, the performance parameter of the sensitization unit that the marginal zone corresponds is superior to the performance parameter of the sensitization unit that the center corresponds.

12. The display screen assembly of claim 11, wherein the gain of the light sensing units corresponding to the edge regions is greater than the gain of the light sensing units corresponding to the central region.

13. The display panel assembly of claim 11, wherein the plurality of photosensitive cells form a first photosensitive cell group and a second photosensitive cell group, the first photosensitive cell group is disposed corresponding to the central region, the second photosensitive cell group is disposed corresponding to the edge region, a gain of the first photosensitive cell group gradually decreases from the central region toward the edge region, a gain of the second photosensitive cell group gradually decreases from the central region toward the edge region, and a gain of the photosensitive cells in the first photosensitive cell group is smaller than a gain of the photosensitive cells in the second photosensitive cell group.

14. The display screen assembly of claim 11, further comprising a filtering unit and an amplifying unit, wherein the light sensing unit is configured to emit a detection signal, the filtering unit is configured to filter out clutter in the detection signal, and the amplifying unit is configured to amplify an amplitude of the detection signal from which the clutter is filtered out.

15. The display screen assembly of claim 11, wherein the exposure time period of the photosensitive unit corresponding to the edge region is longer than the exposure time period of the photosensitive unit corresponding to the central region.

16. An electronic device, comprising a cover plate and a display screen assembly as claimed in any one of claims 1 to 15, wherein the optical sensor is configured to receive a target light from the cover plate incident toward the display screen assembly when performing fingerprint image acquisition, wherein the target light carries fingerprint information of a target object, the optical sensor converts the target light carrying the fingerprint information of the target object into an electrical signal carrying the fingerprint information of the target object, the controller generates a fingerprint image of the target object according to the electrical signal carrying the fingerprint information of the target object, and the controller compares the fingerprint image of the target object with a preset fingerprint image to determine whether the fingerprint image of the target object matches the preset fingerprint image.

Technical Field

The application relates to the technical field of electronics, especially, relate to a display screen subassembly and electronic equipment.

Background

With the development of display technology, display devices having a fingerprint recognition function are widely used. The user can use the finger touch display device's display screen to display device gathers and discerns user's fingerprint line. In the correlation technique, the optical fingerprint adopts the bright facula light filling of display screen height, and optical fingerprint sensor is because the optical characteristic of self lens, and the darker and bright condition in central part in marginal part can appear in the fingerprint image of formation, and the overexposure can appear in central part like this fingerprint line, and in the comparatively fuzzy phenomenon of marginal part formation of image, has reduced fingerprint identification's sensitivity.

Disclosure of Invention

The embodiment of the application provides a display screen assembly. The display screen subassembly includes display panel, optical sensor and controller, display panel has the fingerprint identification district, the fingerprint identification district is including the center district and encircle the marginal zone of center district, optical sensor corresponds the setting of fingerprint identification district, optical sensor is used for gathering the fingerprint image of target object, optical sensor has a plurality of sensitization unit, the controller control the performance parameter of the sensitization unit that the marginal zone corresponds is superior to the performance parameter of the sensitization unit that the center corresponds.

The display screen subassembly that this application embodiment provided includes display panel, optical sensor and controller, optical sensor corresponds display panel's fingerprint identification district setting, optical sensor is used for gathering target object's fingerprint image, the fingerprint identification district is including the center district and the marginal zone that encircles the center district, the performance parameter of the photosensing unit that the controller control marginal zone corresponds is superior to the performance parameter of the photosensing unit that the center district corresponds, thereby form complementally with the middle bright dark optical property in edge that optical sensor self lens appears, in order to improve the definition of the fingerprint image of gathering, and then improve fingerprint identification's sensitivity.

The embodiment of the application also provides a display screen assembly. The display screen assembly comprises a display panel and an optical sensor, the display panel is provided with a fingerprint identification area, the fingerprint identification area comprises a central area and an edge area surrounding the central area, the optical sensor corresponds to the fingerprint identification area, the optical sensor is used for collecting a fingerprint image of a target object, the optical sensor is provided with a plurality of photosensitive units, and the performance parameters of the photosensitive units corresponding to the edge area are superior to the performance parameters of the photosensitive units corresponding to the central area.

The embodiment of the application further provides an electronic device, which is characterized in that the electronic device includes a cover plate and the display screen assembly, when fingerprint image acquisition is performed, the optical sensor is used for receiving target light rays from the cover plate towards the display screen assembly, wherein the target light rays carry fingerprint information of a target object, the optical sensor converts the target light rays carrying the fingerprint information of the target object into an electric signal carrying the fingerprint information of the target object, the controller generates a fingerprint image of the target object according to the electric signal carrying the fingerprint information of the target object, and the controller compares the fingerprint image of the target object with a preset fingerprint image to judge whether the fingerprint image of the target object is matched with the preset fingerprint image.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first display screen assembly provided in an embodiment of the present application.

Fig. 2 is a schematic diagram of a first optical sensor provided in an embodiment of the present application and connected to a controller.

Fig. 3 is a schematic diagram of a second optical sensor provided in an embodiment of the present application and connected to a controller.

Fig. 4 is a schematic diagram of a third optical sensor provided in the embodiment of the present application and connected to a controller.

Fig. 5 is a schematic structural diagram of a second display screen assembly provided in an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a third display screen assembly provided in an embodiment of the present application.

Fig. 7 is a schematic diagram of a fourth optical sensor provided in the embodiment of the present application and connected to a controller.

Fig. 8 is a schematic diagram of a fifth optical sensor provided in an embodiment of the present application and connected to a controller.

Fig. 9 is a schematic diagram of a first fingerprint path fitting provided in the embodiment of the present application.

Fig. 10 is a schematic structural diagram of a fourth display screen assembly provided in the embodiment of the present application.

Fig. 11 is a schematic structural diagram of a first optical sensor provided in an embodiment of the present application.

Fig. 12 is a schematic structural diagram of a fifth display screen assembly provided in an embodiment of the present application.

Fig. 13 is a schematic structural diagram of a first electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive effort based on the embodiments in the present application are within the scope of protection of the present application.

Referring to fig. 1 and 2 together, the display screen assembly 10 includes a display panel 100, an optical sensor 200 and a controller 300, the display panel 100 has a fingerprint identification area 100a, the fingerprint identification area 100a includes a central area 100b and an edge area 100c surrounding the central area 100b, the optical sensor 200 is disposed corresponding to the fingerprint identification area 100a, the optical sensor 200 is used for collecting a fingerprint image of a target object, the optical sensor 200 has a plurality of light sensing units 210, and the controller 300 controls performance parameters of the light sensing units 210 corresponding to the edge area 100c to be better than performance parameters of the light sensing units 210 corresponding to the central area 100 b.

The display panel 100 may be a liquid crystal display panel 100, or may be an organic light emitting diode display panel 100.

The fingerprint identification area 100a may be circular, square, or other shapes. In some embodiments, the central region 100b may be completely surrounded by the edge region 100 c. In other embodiments, the central region 100b may also be partially surrounded by the edge region 100 c.

The optical sensor 200 generally refers to a device that senses light energy from ultraviolet light to infrared light and converts the light energy into an electrical signal. The optical sensor 200 can be designed to be adjustable in block, ring and point shapes, and can also be in other adjustment forms, so that the optical sensor 200 can be adaptively adjusted according to the actual light spot light supplement shape, and the optical sensor can be favorably adapted to more complex use environments.

The light signal recognized by the optical sensor 200 may be visible light or invisible light.

For example, the light signal is visible light, and the photosensitive layer of the optical sensor 200 generates a photoelectric effect when sensing the visible light. For example, the photosensitive layer of the optical sensor 200 may be a silicon-rich compound, including but not limited to silicon-rich silicon oxide (SiOx), silicon-rich silicon nitride (SiNy), silicon-rich silicon oxynitride (SiOxNy), and the like, where x and y are positive integers, such as x ═ 2 and y ═ 2. The input end of the optical sensor 200 is made of transparent conductive material. The transparent conductive material may be, but is not limited to, Indium Tin Oxide (ITO). The light signal enters the photosensitive layer of the optical sensor 200 through the input end of the optical sensor 200.

The controller 300 may be a central processing unit or a microprocessor.

The photosensitive unit 210 may be a photodiode, which is a semiconductor device composed of a PN junction and has a unidirectional conductive characteristic. A photoelectric sensing device for converting an optical signal into an electrical signal in an electrical circuit.

The fingerprint identification area 100a is used for being touched by a target object to complete the acquisition and matching functions of a fingerprint image of the target object. Wherein the target object is a user. The optical sensor 200 is disposed corresponding to the fingerprint identification area 100a, and further, the optical sensor 200 may be disposed opposite to the central area 100b of the fingerprint identification area 100a, so that the optical sensor 200 may acquire a relatively complete fingerprint image, which is beneficial to improving the sensitivity of fingerprint identification.

In this embodiment, the performance parameter of the photosensitive unit 210 corresponding to the edge area 100c is better than the performance parameter of the photosensitive unit 210 corresponding to the central area 100 b: the overall performance parameters of the photosensitive units 210 corresponding to the edge area 100c are better than those of the photosensitive units 210 corresponding to the central area 100 b. The performance parameters of some of the local photosensitive cells 210 corresponding to the edge region 100c may be worse than those of some of the local photosensitive cells 210 corresponding to the central region 100b, but the overall parameter edge region 100c is better than that of the central region 100 b. The performance parameters are expressed by the gain of the photosensitive unit 210, the exposure time of the photosensitive unit 210, the arrangement density of the photosensitive unit 210, the light emitting efficiency of the photosensitive unit 210, and the like.

The image obtained when the performance parameter of the photosensitive unit 210 corresponding to the central area 100b is equal to the preset performance parameter and the performance parameter of the photosensitive unit 210 corresponding to the frame area 100c is controlled by the controller 300 to be better than the performance parameter of the photosensitive unit 210 corresponding to the central area 100b is simply referred to as the first fingerprint image. On the premise that the performance parameter of the photosensitive unit 210 corresponding to the central area 100b is fixed, that is, the performance parameter of the photosensitive unit 210 corresponding to the central area 100b is also equal to the preset performance parameter, when the controller 300 controls the performance parameter of the photosensitive unit 210 corresponding to the frame area 100c to be equal to the performance parameter of the photosensitive unit 210 corresponding to the central area 100b, the obtained image is simply referred to as the second fingerprint image. Then the sharpness of the first fingerprint image is better than the sharpness of the second fingerprint image.

In the related art, the optical fingerprint adopts the uniform light spot light supplement with the high brightness of the display screen, and the optical sensor 200 forms a fingerprint image with darker edge and brighter center due to the optical characteristics of the lens, so that the fingerprint lines are overexposed at the center of the fingerprint identification area 100a, and the imaging at the edge of the fingerprint identification area 100a is fuzzy, thereby reducing the sensitivity of fingerprint identification. The display screen assembly 10 provided by the embodiment of the application comprises a display panel 100, an optical sensor 200 and a controller 300, wherein the optical sensor 200 is arranged corresponding to a fingerprint identification area 100a of the display panel 100, the optical sensor 200 is used for collecting a fingerprint image of a target object, the fingerprint identification area 100a comprises a central area 100b and an edge area 100c surrounding the central area 100b, and the controller 300 controls the performance parameters of the photosensitive unit 210 corresponding to the edge area 100c to be superior to the performance parameters of the photosensitive unit 210 corresponding to the central area 100b, so that the performance parameters are complementary to the optical properties of middle bright edges and dark edges of a lens of the optical sensor 200, the overall definition of the collected fingerprint image is improved, and the sensitivity of fingerprint identification is improved.

In one embodiment, the controller 300 controls the gain of the light sensing unit 210 corresponding to the edge area 100c to be greater than the gain of the light sensing unit 210 corresponding to the central area 100 b.

Here, "gain" refers to amplification factor. When the gain parameters of the light sensing units 210 on the optical sensor 200 are specifically designed, a planar image without a fingerprint is firstly obtained through calibration, then the brightness parameters of each light sensing unit 210 corresponding to the image are obtained, then the controller 300 controls the gain of the light sensing units 210 at different positions, and the gain parameters of all the light sensing units 210 are adjusted to be consistent, so that all the light sensing units 210 are in an initialized state. Then, a planar image without a fingerprint is obtained again, the image and the gain parameters of each photosensitive unit 210 are recorded, and the image and the gain parameters of each photosensitive unit 210 are used as calibration parameters of a subsequently acquired fingerprint image. By collecting the brightness parameters of the corresponding photosensitive units 210 when no fingerprint image exists, the gain parameters of all the photosensitive units 210 are adjusted to be consistent, so that all the photosensitive units 210 are in the initialized state and taken as the reference for adjustment, the subsequent adjustment of the gain parameters of the photosensitive units 210 is facilitated, the gain parameters of the photosensitive units 210 at different positions can be ensured to meet the requirements of users, the improvement of the definition of the collected fingerprint image in the marginal area 100c is facilitated, and the improvement of the sensitivity of fingerprint identification is facilitated.

Specifically, in this embodiment, the gains of all the photosensitive cells 210 corresponding to the edge area 100c are kept consistent, the gains of all the photosensitive cells 210 corresponding to the central area 100b are kept consistent, and the gain of the photosensitive cell 210 corresponding to the edge area 100c is greater than the gain of the photosensitive cell 210 corresponding to the central area 100 b. The gains of all the light sensing units 210 corresponding to the edge area 100c and the gains of all the light sensing units 210 corresponding to the central area 100b present two-stage stepwise changes, which facilitates the adjustment of the gains of the light sensing units 210 on one hand and helps to improve the brightness of the edge area 100c on the other hand, so that the fingerprint image corresponding to the edge area 100c is clearer and helps to improve the sensitivity of fingerprint identification. For example, the gains of all the photo-sensing units 210 corresponding to the edge area 100c are all 3, and the gains of all the photo-sensing units 210 corresponding to the central area 100b are all 2.

Referring to fig. 3, further, the position between the central area 100b and the edge area 100c is an interface area 100d, and the gain of the light sensing unit 210 corresponding to the interface area 100d is an average value of the gain of the light sensing unit 210 corresponding to the central area 100b and the gain of the light sensing unit 210 corresponding to the edge area 100 c. The gains of all the light sensing units 210 corresponding to the edge region 100c, the gains of all the light sensing units 210 corresponding to the boundary region 100d, and the gains of all the light sensing units 210 corresponding to the central region 100b present three-level stepwise changes, which facilitates adjusting the gains of the light sensing units 210 on one hand, and facilitates improving the brightness of the edge region 100c on the other hand, so that the fingerprint image corresponding to the edge region 100c is clearer, and facilitates improving the sensitivity of fingerprint identification. For example, the gains of all the photo-sensing units 210 corresponding to the edge region 100c are all 3, the gains of all the photo-sensing units 210 corresponding to the central region 100b are all 2, and the gains of all the photo-sensing units 210 corresponding to the boundary region 100d are all 2.5.

Referring to fig. 4, in another embodiment, a plurality of the photosensitive cells 210 form a first photosensitive cell group 210a and a second photosensitive cell group 210b, the first photosensitive cell group 210a is disposed corresponding to the central area 100b, the second photosensitive cell group 210b is disposed corresponding to the edge area 100c, the controller 300 controls the gain of the first photosensitive cell group 210a to gradually decrease from the central area 100b toward the edge area 100c, and controls the gain of the second photosensitive cell group 210b to gradually decrease from the central area 100b toward the edge area 100c, wherein the gain of the photosensitive cell 210 in the first photosensitive cell group 210a is smaller than the gain of the photosensitive cell 210 in the second photosensitive cell group 210 b.

The gain of the first photosensitive cell group 210a gradually decreases from the central area 100b toward the edge area 100c, and the gain of the second photosensitive cell group 210b gradually decreases from the central area 100b toward the edge area 100c, and the gain in the process may be linearly changed or non-linearly changed.

Specifically, in a whole view, the gain of the photosensitive unit 210 corresponding to the fingerprint identification area 100a gradually decreases from the central area 100b to the edge area 100c, and the gain of the photosensitive unit 210 continuously changes from the central area 100b to the edge area 100c, which is helpful for keeping the brightness of the fingerprint identification area 100a uniform, and further improving the definition of the acquired fingerprint image and the sensitivity of fingerprint identification. When viewed locally, the gain of the photosensitive cells 210 in the first photosensitive cell group 210a disposed in the central region 100b gradually decreases from the central region 100b toward the edge region 100c, the gain of the photosensitive cells 210 in the second photosensitive cell group 210b disposed in the edge region 100c gradually decreases from the central region 100b toward the edge region 100c, and the gain of the photosensitive cells 210 in the first photosensitive cell group 210a is smaller than the gain of the photosensitive cells 210 in the second photosensitive cell group 210 b. Therefore, the brightness of the processed edge area 100c is higher than that of the central area 100b, and is complementary to the optical property of the optical sensor 200, which shows bright edges in the middle, so that the overall definition of the acquired fingerprint image is improved, and the sensitivity of fingerprint identification is improved.

Further, the gains of the light sensing units 210 corresponding to the portions of the edge region 100c where the distance from the central region 100b is kept consistent are kept consistent. That is, when the center point of the central area 100b is used as the center of the circle, the gains of the photosensitive units 210 corresponding to different positions on the same circumference are kept consistent, thereby helping to keep the uniform brightness of the whole fingerprint identification area 100a, improving the overall definition of the collected fingerprint image, and further improving the sensitivity of fingerprint identification.

It should be noted that, while the gain of the photosensitive unit 210 is adjusted, the exposure time length of the photosensitive unit 210 may also be adjusted, and the adjustment of the exposure time length of the photosensitive unit 210 will be described in detail later, and will not be described in detail herein.

Referring to fig. 5, in another embodiment, the display screen assembly 10 further includes a filtering unit 510 and an amplifying unit 520. The light sensing unit 210 is configured to emit a detection signal, and the filtering unit 510 is configured to filter out noise in the detection signal. The amplifying unit 520 is configured to amplify the amplitude of the detection signal with the noise filtered. That is, the amplifying unit 520 is used to adjust the gain of the light sensing unit 210, and the amplifying unit 520 may be an amplifier.

Specifically, if the gain of the photosensitive unit 210 is simply changed, the noise of the detection signal is increased at the same time, and therefore, the noise in the detection signal sent by the photosensitive unit 210 needs to be removed while the gain of the photosensitive unit 210 of the optical sensor 200 is increased, so that the noise is prevented from generating bad interference on the definition of the acquired fingerprint image, and the accuracy of fingerprint identification can be improved.

In other embodiments, the controller 300 controls the exposure time of the photosensitive unit 210 corresponding to the edge area 100c to be longer than the exposure time of the photosensitive unit 210 corresponding to the central area 100 b.

The photosensitive unit 210 is a photodiode, and the controller 300 adjusts the exposure duration of the photosensitive unit 210 by controlling the on-time length of the photodiode, so as to increase the brightness of the corresponding area of the photosensitive unit 210.

In one embodiment, the exposure time lengths of all the photosensitive units 210 corresponding to the edge area 100c are kept consistent, the exposure time lengths of all the photosensitive units 210 corresponding to the central area 100b are kept consistent, and the exposure time length of the photosensitive unit 210 corresponding to the edge area 100c is greater than the exposure time length of the photosensitive unit 210 corresponding to the central area 100 b. The exposure time lengths of all the photosensitive units 210 corresponding to the edge area 100c and the exposure time lengths of all the photosensitive units 210 corresponding to the central area 100b exhibit two-stage stepwise changes, which facilitates adjustment of the exposure time lengths of the photosensitive units 210 on one hand, and helps to improve the brightness of the edge area 100c on the other hand, so that the fingerprint image corresponding to the edge area 100c is clearer, and helps to improve the sensitivity of fingerprint identification. For example, the exposure time of all the photosensitive units 210 corresponding to the edge area 100c is 0.08s, and the exposure time of all the photosensitive units 210 corresponding to the central area 100b is 0.04 s.

Further, the position between the central area 100b and the edge area 100c is an interface area 100d, and the exposure time of the photosensitive unit 210 corresponding to the interface area 100d is an average value of the exposure time of the photosensitive unit 210 corresponding to the central area 100b and the exposure time of the photosensitive unit 210 corresponding to the edge area 100 c. The exposure durations of all the photosensitive cells 210 corresponding to the edge region 100c, the exposure durations of all the photosensitive cells 210 corresponding to the boundary region 100d, and the exposure durations of all the photosensitive cells 210 corresponding to the central region 100b exhibit three-level stepwise changes, which facilitates adjustment of the exposure durations of the photosensitive cells 210 on one hand, and contributes to improvement of the brightness of the edge region 100c on the other hand, so that the fingerprint image corresponding to the edge region 100c is clearer, and contributes to improvement of the sensitivity of fingerprint identification. For example, the exposure time of all the photo-sensing units 210 corresponding to the edge region 100c is 0.08s, the exposure time of all the photo-sensing units 210 corresponding to the central region 100b is 0.04s, and the exposure time of all the photo-sensing units 210 corresponding to the boundary region 100d is 0.06 s.

In another embodiment, the plurality of the photosensitive units 210 form a first photosensitive unit group 210a and a second photosensitive unit group 210b, the first photosensitive unit group 210a corresponds to the central area 100b, the second photosensitive unit group 210b corresponds to the edge area 100c, the controller 300 controls the exposure duration of the first photosensitive unit group 210a to gradually decrease from the central area 100b toward the edge area 100c, and controls the exposure duration of the second photosensitive unit group 210b to gradually decrease from the central area 100b toward the edge area 100c, wherein the exposure duration of the photosensitive unit 210 in the first photosensitive unit group 210a is less than the exposure duration of the photosensitive unit 210 in the second photosensitive unit group 210 b.

The exposure time of the first photosensitive unit group 210a gradually decreases from the central area 100b toward the edge area 100c, and the exposure time of the second photosensitive unit group 210b gradually decreases from the central area 100b toward the edge area 100c, and the exposure time in the process may be linearly changed or non-linearly changed.

Specifically, in a whole view, the exposure duration of the photosensitive unit 210 corresponding to the fingerprint identification area 100a gradually decreases from the central area 100b to the edge area 100c, and the exposure duration of the photosensitive unit 210 continuously changes from the central area 100b to the edge area 100c, which is beneficial to keeping the brightness of the fingerprint identification area 100a uniform, and further improving the definition of the acquired fingerprint image and the sensitivity of fingerprint identification. Viewed locally, the exposure time period of the photosensitive cells 210 in the first photosensitive cell group 210a disposed in the central region 100b gradually decreases from the central region 100b toward the edge region 100c, the exposure time period of the photosensitive cells 210 in the second photosensitive cell group 210b disposed in the edge region 100c gradually decreases from the central region 100b toward the edge region 100c, and the exposure time period of the photosensitive cells 210 in the first photosensitive cell group 210a is smaller than that of the photosensitive cells 210 in the second photosensitive cell group 210 b. Therefore, the brightness of the processed edge area 100c is higher than that of the central area 100b, and is complementary to the optical property of the optical sensor 200, which shows bright edges in the middle, so that the overall definition of the acquired fingerprint image is improved, and the sensitivity of fingerprint identification is improved.

Further, the exposure time periods of the photosensitive units 210 corresponding to the portions of the edge area 100c, at which the distance from the central area 100b is kept consistent, are kept consistent. That is, when the center point of the central area 100b is used as the center of a circle, the exposure time lengths of the photosensitive units 210 corresponding to different positions on the same circumference are kept consistent, so that the whole fingerprint identification area 100a is kept at uniform brightness, the overall definition of the acquired fingerprint image can be improved, and the sensitivity of fingerprint identification is improved.

In some other embodiments, the controller 300 adjusts the light sensing unit 210 to a target brightness, records an adjustment time for adjusting the light sensing unit 210 to the target brightness, and uses the adjustment time as a reference, and when the light sensing unit 210 needs to be turned on next time, the controller 300 adjusts the exposure duration of the light sensing unit 210 according to the adjustment time.

Specifically, the controller 300 may adjust the brightness of the photosensitive unit 210 corresponding to the planar image without the fingerprint to a target brightness, and record an adjustment time corresponding to the adjustment of the photosensitive unit 210 to the target brightness, which is used as a reference, when the optical sensor 200 needs to be started next time, the controller 300 adjusts the exposure duration of the photosensitive unit 210 according to the recorded adjustment time, so that the brightness of the photosensitive unit 210 may be quickly adjusted, so that the brightness of the photosensitive unit 210 reaches the target brightness, and the brightness of the photosensitive unit 210 is prevented from being readjusted again, which is helpful to save the time for adjusting the brightness of the photosensitive unit 210, and further improve the response speed of the optical sensor 200.

It should be noted that the controller 300 may also adjust the brightness of the photosensitive unit 210 corresponding to the planar image when the fingerprint is attached to the fingerprint identification area 100a for fingerprint matching to the target brightness, and record the adjustment time for adjusting the photosensitive unit 210 to the target brightness, which is used as a reference, when the optical sensor 200 needs to be started for fingerprint image acquisition and matching next time, the controller 300 adjusts the exposure duration of the photosensitive unit 210 according to the recorded adjustment time, so as to quickly adjust the brightness of the photosensitive unit 210, so that the brightness of the photosensitive unit 210 reaches the target brightness, and avoid readjusting the brightness of the photosensitive unit 210, which is helpful to save the brightness adjustment time of the photosensitive unit 210, shorten the acquisition and matching time of the fingerprint image, and improve the response speed of the optical sensor 200.

In some other embodiments, the controller 300 adjusts the exposure duration and the gain of the photosensitive unit 210 corresponding to the edge region 100c to obtain a first parameter, the controller 300 adjusts the exposure duration and the gain of the photosensitive unit 210 corresponding to the central region 100b to obtain a second parameter, the photosensitive unit 210 corresponding to the edge region 100c obtains a first image under the condition of the first parameter, and if the photosensitive unit 210 corresponding to the edge region 100c obtains a second image under the condition of the second parameter, the sharpness of the first image is greater than the sharpness of the second image.

The performance parameter of the photosensitive unit 210 corresponding to the edge area 100c is a first parameter, the performance parameter of the photosensitive unit 210 corresponding to the central area 100b is a second parameter, the photosensitive unit 210 corresponding to the edge area 100c obtains a first image under the condition of the first parameter, and if the photosensitive unit 210 corresponding to the edge area 100c obtains a second image under the condition of the second parameter, what is expressed that the definition of the first image is greater than the definition of the second image is: the overall index of the first parameter of the light-sensing unit 210 corresponding to the edge area 100c is better than the overall index of the first parameter of the light-sensing unit 210 corresponding to the central area 100 b. The performance parameters of some of the local photosensitive cells 210 corresponding to the edge region 100c may be worse than those of some of the local photosensitive cells 210 corresponding to the central region 100b, but the overall parameter edge region 100c is better than that of the central region 100 b. The performance parameters are expressed by the gain of the photosensitive unit 210, the exposure time of the photosensitive unit 210, the arrangement density of the photosensitive unit 210, the light emitting efficiency of the photosensitive unit 210, and the like. That is, under the same condition, the definition of the first image obtained by the photosensitive unit 210 corresponding to the edge area 100c under the first parameter condition is greater than the definition of the second image obtained by the photosensitive unit 210 corresponding to the edge area 100c under the second parameter condition.

With continued reference to fig. 6 and 7, the display screen assembly 10 further includes a detector 400, when the detector 400 detects that the target photosensitive unit 211 in the optical sensor 200 is damaged, the detector 400 sends a feedback signal, and the controller 300 controls an exposure duration of the first photosensitive unit 212 adjacent to the target photosensitive unit 211 to be greater than a first preset duration according to the feedback signal, where the first preset duration is an exposure duration of the first photosensitive unit 212 when the target photosensitive unit 211 is not damaged.

Specifically, when the target photosensitive unit 211 is damaged, a dark area may occur in a local area of the target photosensitive unit 211 corresponding to the fingerprint identification area 100a, and in order to compensate for the brightness of the target photosensitive unit 211, the exposure time period of the first photosensitive unit 212 adjacent to the target photosensitive unit 211 needs to be adjusted to a target time period, where the target time period is greater than a first preset time period. Therefore, the situation that the fingerprint identification area 100a is locally darkened due to damage of the target photosensitive unit 211 is compensated, the overall brightness of the fingerprint identification area 100a is improved, and the sensitivity of fingerprint identification is improved.

The first photosensitive unit 212 may be a single photosensitive unit 210, or may be a set of a plurality of photosensitive units 210. When the first photosensitive unit 212 is a set of the plurality of photosensitive units 210, the exposure time periods of the plurality of photosensitive units 210 may be adjusted to be uniform, or the exposure time periods of the plurality of photosensitive units 210 may be adjusted to be non-uniform, and the first photosensitive unit 212 is used to compensate for the defect of local darkening of the fingerprint identification area 100a due to damage of the target photosensitive unit 211.

Further, when the first photosensitive unit 212 is disposed adjacent to the central region 100b with respect to the target photosensitive unit 211, the first photosensitive unit 212 adjusts the exposure time period of the first photosensitive unit 212 in the first increment on the basis of the first preset time period. When the first photosensitive unit 212 is disposed adjacent to the edge region 100c with respect to the target photosensitive unit 211, the first photosensitive unit 212 adjusts the exposure time period of the first photosensitive unit 212 by a second increment on the basis of a first preset time period, wherein the first increment is smaller than the second increment. Because the first increment is smaller than the second increment, when the first photosensitive unit 212 is close to the edge area 100c relative to the target photosensitive unit 211, the adjustment of the exposure duration of the first photosensitive unit 212 is more obvious, so that the brightness of the target photosensitive unit 211 is compensated, the brightness of the edge area 100c can be further improved, the definition of the fingerprint image corresponding to the edge area 100c is improved, and the sensitivity of fingerprint identification is improved.

Referring to fig. 8, in an embodiment, the photosensitive unit 210 further includes a second photosensitive unit 213, the second photosensitive unit 213 is disposed adjacent to the target photosensitive unit 211, the first photosensitive unit 212 is disposed adjacent to the center of the optical sensor 200 relative to the second photosensitive unit 213, and the controller 300 further controls an exposure duration of the second photosensitive unit 213 to be greater than a second preset duration, wherein the first preset duration is less than the second preset duration, and the second preset duration is an exposure duration of the second photosensitive unit 213 when the target photosensitive unit 211 is not damaged.

In particular, since the first photosensitive unit 212 and the second photosensitive unit 213 are adjacent to the target photosensitive unit 211, when the target photosensitive unit 211 is damaged, and the first photosensitive unit 212 is disposed more adjacent to the central region 100b than the second photosensitive unit 213, the controller 300 controls the exposure time of the first photosensitive unit 212 to be a first time, controls the exposure time of the second photosensitive unit 213 to be a second time, and controls the exposure time to be a second time, wherein the first time is longer than a first preset time, the second time is longer than a second preset time, and the first preset time is longer than the second preset time, and at this time, the brightness of the marginal area 100c can be improved, the overall brightness of the fingerprint identification area 100a can be improved, the defect that the local part of the fingerprint identification area 100a is darkened due to the damage of the target photosensitive unit 211 is overcome, the definition of the collected fingerprint image is improved, and the sensitivity of fingerprint identification is improved. For example, the first exposure time of the first photosensitive unit 212 is 0.05s, the second exposure time of the second photosensitive unit 213 is 0.08s, the first preset time is 0.04s, and the second preset time is 0.07 s.

Referring to fig. 9, in another embodiment, the photosensitive unit 210 includes a target photosensitive unit 211, a first photosensitive unit 212, and a second photosensitive unit 213, where the first photosensitive unit 212 and the second photosensitive unit 213 are both disposed adjacent to the target photosensitive unit 211, and when the target photosensitive unit 211 is damaged, the controller 300 fits the fingerprint patterns of the target object acquired by the first photosensitive unit 212 and the second photosensitive unit 213 to obtain the fingerprint pattern corresponding to the target photosensitive unit 211.

Specifically, since the target photosensitive unit 211 is damaged, the target photosensitive unit 211 cannot capture a fingerprint image. At this time, the fingerprint texture corresponding to the target photosensitive unit 211 needs to be obtained according to the fingerprint texture fitting of the first photosensitive unit 212 and the second photosensitive unit 213 adjacent to the target photosensitive unit 211. The example is given by taking the fingerprint path acquired by the first photosensitive unit 212 as S1, the fingerprint path acquired by the second photosensitive unit 213 as S2, and the fingerprint path corresponding to the target photosensitive unit 211 obtained by fitting as S3. The curvature of the fingerprint ridge S3 corresponding to the target photosensitive unit 211 can be obtained by curve fitting according to the first curvature of the fingerprint ridge S1 collected by the first photosensitive unit 212 and the second curvature of the fingerprint ridge S2 collected by the second photosensitive unit 213. When the first curvature is equal to the second curvature, it can be considered that the target curvature of the fingerprint vein S3 corresponding to the target photosensitive unit 211 is consistent with the first curvature and the second curvature. When the first photosensitive unit 212 is closer to the central area 100b than the second photosensitive unit 213, it may be considered that the first curvature of the fingerprint grain S1 corresponding to the first photosensitive unit 212 is the target curvature of the fingerprint grain S3 corresponding to the target photosensitive unit 211, at this time, the first curvature of the fingerprint grain S1 corresponding to the first photosensitive unit 212 may be used as the curvature of the fingerprint grain S3 corresponding to the target photosensitive unit 211, so that it is not necessary to obtain the fingerprint grain S3 corresponding to the target photosensitive unit 211 through other operation methods, which is helpful to improve efficiency in fingerprint image acquisition, shorten time for acquiring a fingerprint image, and improve response speed of the optical sensor 200.

Referring to fig. 10, the display screen assembly 10 includes a display panel 100 and an optical sensor 200, the display panel 100 has a fingerprint identification area 100a, the fingerprint identification area 100a includes a central area 100b and an edge area 100c surrounding the central area 100b, the optical sensor 200 is disposed corresponding to the fingerprint identification area 100a, the optical sensor 200 is used for collecting a fingerprint image of a target object, the optical sensor 200 has a plurality of light sensing units 210, and performance parameters of the light sensing units 210 corresponding to the edge area 100c are better than those of the light sensing units 210 corresponding to the central area 100 b.

In this embodiment, the performance parameter of the photosensitive unit 210 corresponding to the edge area 100c is better than the performance parameter of the photosensitive unit 210 corresponding to the central area 100b, which means that when the photosensitive unit 210 of the optical sensor 200 is manufactured, the overall performance parameter of the photosensitive unit 210 corresponding to the edge area 100c is better than the overall performance parameter of the photosensitive unit 210 corresponding to the edge area 100 c. And after the performance parameters of the photosensitive unit 210 are manufactured, the performance parameters of the photosensitive unit 210 are not adjusted, that is, the performance parameters of the photosensitive unit 210 are already solidified, so that the problem of post-adjustment does not exist.

The performance parameters of the photosensitive unit 210 include the exposure duration, gain, density, and luminous efficiency of the photosensitive unit 210.

In some possible embodiments, the gain of the light sensing unit 210 corresponding to the edge area 100c is greater than the gain of the light sensing unit 210 corresponding to the central area 100 b.

With reference to fig. 11, in another possible embodiment, a plurality of the photosensitive cells 210 form a first photosensitive cell group 210a and a second photosensitive cell group 210b, the first photosensitive cell group 210a is disposed corresponding to the central area 100b, the second photosensitive cell group 210b is disposed corresponding to the edge area 100c, a gain of the first photosensitive cell group 210a gradually decreases from the central area 100b toward the edge area 100c, and a gain of the second photosensitive cell group 210b gradually decreases from the central area 100b toward the edge area 100c, where the gain of the photosensitive cell 210 in the first photosensitive cell group 210a is smaller than the gain of the photosensitive cell 210 in the second photosensitive cell group 210 b.

With continued reference to fig. 12, in still other possible embodiments, the display screen assembly 10 further includes a filtering unit 510 and an amplifying unit 520. The light sensing unit 210 is configured to emit a detection signal, and the filtering unit 510 is configured to filter out noise in the detection signal. The amplifying unit 520 is configured to amplify the amplitude of the detection signal with the noise filtered. That is, the amplifying unit 520 is used to adjust the gain of the light sensing unit 210.

In some other possible embodiments, the exposure time of the photosensitive unit 210 corresponding to the edge area 100c is longer than the exposure time of the photosensitive unit 210 corresponding to the central area 100 b.

In some other embodiments, the arrangement density of the photosensitive units 210 corresponding to the central region 100b is less than the arrangement density of the photosensitive units 210 corresponding to the edge region 100 c.

Specifically, since the arrangement density of the photosensitive units 210 corresponding to the edge area 100c is large, and the arrangement density of the photosensitive units 210 corresponding to the central area 100b is small, under the condition that other conditions are the same, the brightness of the edge area 100c can be improved to a greater extent, so that the brightness is complementary to the optical characteristic of the optical sensor 200 that the middle bright edge is dark, the overall brightness of the fingerprint identification area 100a is improved, the improvement of the definition of the acquired fingerprint image is facilitated, and the sensitivity of fingerprint identification is improved.

In still other embodiments, a plurality of the photosensitive cells 210 are uniformly distributed, and the luminous efficiency of the photosensitive cell 210 corresponding to the central region 100b is less than the luminous efficiency of the photosensitive cell 210 corresponding to the edge region 100 c.

Specifically, because the light-emitting efficiency of the light-sensing unit 210 corresponding to the edge region 100c is higher, and the light-emitting efficiency of the light-sensing unit 210 corresponding to the central region 100b is lower, under the condition that other conditions are kept the same, the brightness of the edge region 100c can be improved to a greater extent, so that the brightness is complementary to the optical characteristic of the optical sensor 200 that the middle bright edge is dark, the overall brightness of the fingerprint identification region 100a is improved, the definition of the acquired fingerprint image is improved, and the sensitivity of fingerprint identification is improved.

In the related art, the optical fingerprint adopts the uniform light spot light supplement with the high brightness of the display screen, and the optical sensor 200 forms a fingerprint image with darker edge and brighter center due to the optical characteristics of the lens, so that the fingerprint lines are overexposed at the center of the fingerprint identification area 100a, and the imaging at the edge of the fingerprint identification area 100a is fuzzy, thereby reducing the sensitivity of fingerprint identification. The display screen assembly 10 provided by the embodiment of the application comprises a display panel 100 and an optical sensor 200, wherein the optical sensor 200 is arranged corresponding to a fingerprint identification area 100a of the display panel 100, the optical sensor 200 is used for collecting a fingerprint image of a target object, the fingerprint identification area 100a comprises a central area 100b and an edge area 100c surrounding the central area 100b, and as the performance parameters of a photosensitive unit 210 corresponding to the edge area 100c are superior to the performance parameters of a photosensitive unit 210 corresponding to the central area 100b, the performance parameters are complementary to the optical properties of bright edges and dark edges in the middle of a lens of the optical sensor 200, so that the brightness of the whole fingerprint identification area 100a is kept uniform and consistent, the integral definition of the collected fingerprint image is improved, and the sensitivity of fingerprint identification is improved.

Referring to fig. 13, the electronic device 1 includes a cover plate 20 and the display screen assembly 10 provided in any of the embodiments, when acquiring a fingerprint image, the optical sensor 200 is configured to receive a target light from the cover plate 20 and incident toward the display screen assembly 10, where the target light carries fingerprint information of a target object, the optical sensor 200 converts the target light carrying the fingerprint information of the target object into an electrical signal carrying the fingerprint information of the target object, the controller 300 generates a fingerprint image of the target object according to the electrical signal carrying the fingerprint information of the target object, and the controller 300 compares the fingerprint image of the target object with a preset fingerprint image to determine whether the fingerprint image of the target object matches the preset fingerprint image.

The electronic device 1 is a device that is composed of electronic components such as an integrated circuit, a transistor, and an electron tube, and functions by applying electronic technology (including) software, and the common electronic device 1 includes: smart phones, tablet computers, notebook computers, palm computers, Mobile Internet Devices (MID), wearable devices such as smart watches, smart bracelets, pedometers, and the like. The cover plate 20 is a glass cover plate 20.

In the related art, the optical fingerprint adopts the uniform light spot light supplement with the high brightness of the display screen, and the optical sensor 200 forms a fingerprint image with darker edge and brighter center due to the optical characteristics of the lens, so that the fingerprint lines are overexposed at the center of the fingerprint identification area 100a, and the imaging at the edge of the fingerprint identification area 100a is fuzzy, thereby reducing the sensitivity of fingerprint identification. The electronic device 1 provided by the embodiment of the application comprises a display screen assembly 10 and a cover plate 20, the display screen assembly 10 comprises a display panel 100, an optical sensor 200 and a controller 300, the optical sensor 200 is arranged corresponding to a fingerprint identification area 100a of the display panel 100, the optical sensor 200 is used for collecting a fingerprint image of a target object, the fingerprint identification area 100a comprises a central area 100b and an edge area 100c surrounding the central area 100b, and the controller 300 controls the performance parameters of the photosensitive unit 210 corresponding to the edge area 100c to be superior to the performance parameters of the photosensitive unit 210 corresponding to the central area 100b, so that the performance parameters are complementary to the optical properties of middle bright edges and dark edges appearing on a lens of the optical sensor 200, the brightness of the whole fingerprint identification area 100a is kept uniform, the integral definition of the collected fingerprint image is improved, and the sensitivity of fingerprint identification is improved.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.