TWI884756B - Test devices, systems, methods, electronic devices, storage media and program products for under- screen light sensors - Google Patents

Abstract

The present application discloses a test device, a system, a method, an electronic device, a storage medium and a program product for an under-screen light sensor. By arranging the illumination unit and the bearing position of the display screen to be tested on the circular light-guiding area formed by the circular translucent area on the drawer-type placing plate, one of the illumination units is arranged on the center of the circular translucent area, the remaining illumination units and the bearing position of the display screen to be tested are arranged on the circumference of the circular translucent area. During the photosensitive test, the consistency of the ambient light detected by the light sensor under the screen is increased. At the same time, the under-screen light sensor is placed in a light-shielding box to avoid the influence of external light on the light leakage detection of the under-screen light sensor when the display screen to be tested emits light alone for testing.

Description

Test equipment, system, method, electronic device, storage medium and program product for under-screen optical sensor

The embodiments of the present invention relate to the field of display screen testing technology, and in particular to a testing device, system, method, electronic device, storage medium and program product for an under-screen optical sensor.

Liquid crystal screens (LCD/OLED) are widely used in the field of wearable electronic devices due to their advantages such as ultra-thinness, energy saving, clear picture quality, and low radiation. In order to reduce display power consumption, current smart wearable devices, smart handheld terminals, etc. usually need to adjust the screen brightness according to the ambient light intensity, which requires the use of a light sensor under the screen to sense the ambient light intensity.

In order to adjust the brightness of the screen according to the ambient light intensity, it is necessary to test the light leakage performance of the light sensor under the screen. In the existing technology, the test system of the light sensor under the screen cannot detect the assembly position of the light sensor under the screen, and the test function is insufficient.

The present invention provides a test device, system, method, electronic device, storage medium and program product for an under-screen optical sensor, which realizes the assembly position detection of the under-screen optical sensor, increases the test function and improves the test efficiency.

In the first aspect, the embodiment of the present invention provides a light sensor test equipment under the screen, comprising: a light shielding box, a test light source is arranged at the top of the light shielding box; a drawer-type placement board is arranged at the bottom of the light shielding box; a uniform light guide plate is arranged in the middle of the light shielding box, wherein the uniform light guide plate includes a circular light guide area; The drawer-type placement board includes: a plurality of illumination units and a plurality of display screen bearing positions to be tested; the illumination unit and the display screen bearing position to be tested are arranged on the circular light-transmitting area formed on the drawer-type placement board in the circular light-guide area, wherein one illumination unit is arranged at the center of the circular light-transmitting area, and the remaining illumination units and the display screen bearing positions to be tested are arranged on the circumference of the circular light-transmitting area.

Optionally, the test light source includes: a white light source, a red light source, a green light source and a blue light source; wherein the test light source is arranged in a circular planar light panel in the order of the white light source, the red light source, the green light source and the blue light source.

Optionally, the under-screen light sensor test equipment further includes a diffusion plate; the diffusion plate is arranged between the test light source and the uniform light guide plate.

In the second aspect, an embodiment of the present invention provides a test system for a light sensor under a screen, comprising: a main control unit and a light sensor test device under a screen as described in any embodiment of the present invention; the main control unit is electrically connected to the test light source, the illumination unit and the display screen to be tested disposed on the display screen support position through a main control board; the illumination unit is used to detect the light intensity in the light shielding box; the main control unit is used to execute a test method for the light sensor under a screen.

In a third aspect, an embodiment of the present invention provides a method for testing a light sensor under a screen, which is performed by a testing system for the light sensor under a screen as described in any embodiment of the present invention, and includes: obtaining an XY coordinate system of a display area plane of a display screen to be tested; dividing the light sensing area of the light sensor under the screen into a plurality of photosensitive sub-areas according to the XY coordinate system, wherein each of the photosensitive sub-areas has an equal area; and the number of the photosensitive sub-areas in the X direction and the Y direction of the XY coordinate system is equal, and the number is 2n+ 1, n is greater than 0 and is an integer; controlling the display screen to be tested to emit light on one side of the first dividing line in the Y direction, and obtaining a first light intensity of each of the photosensitive sub-areas; controlling the display screen to be tested to emit light on one side in the opposite direction of the first dividing line in the Y direction, and obtaining a second light intensity of each of the photosensitive sub-areas; controlling the display screen to be tested to emit light on one side in the opposite direction of the second dividing line in the X direction, and obtaining a third light intensity of each of the photosensitive sub-areas; controlling the display screen to be tested to emit light on one side in the opposite direction of the second dividing line in the X direction, and obtaining a third light intensity of each of the photosensitive sub-areas; controlling the display screen to be tested to emit light on one side in the opposite direction of the first dividing line in the Y direction, and obtaining a third light intensity of each of the photosensitive sub-areas; controlling the display screen to be tested to emit light on one side in the opposite direction of the first ... The fourth light intensity of each photosensitive area is obtained by emitting light on one side of the X direction of the second dividing line; wherein the first dividing line is parallel to the X direction, the second dividing line is parallel to the Y direction, and both pass through the center of the photosensitive area of the light sensor; the coordinates of the center of the light sensor on the Y axis are obtained according to the first light intensity of each photosensitive area and the second light intensity of each photosensitive area; the coordinates of the center of the light sensor on the Y axis are obtained according to the third light intensity of each photosensitive area and the third light intensity of each photosensitive area; The coordinate of the center of the light sensor on the X-axis is obtained by measuring the fourth light intensity of the sub-area; the display screen to be tested is controlled to form at least four light-emitting areas, wherein the light-emitting areas are arranged around the light sensor; the midpoint of each light-emitting area is at the same distance from the center of the light sensor, and each light-emitting area has the same shape and area; the light intensity of each light-emitting area is obtained; the horizontal installation quality of the light sensor is judged according to the light intensity of each group of light-emitting areas symmetrical about the center of the light sensor.

Optionally, judging the horizontal installation quality of the light sensor according to the luminous intensity of each group of the luminous areas symmetrical about the center of the light sensor includes: The luminous intensity of each group of the luminous areas is respectively a first luminous intensity and a second luminous intensity, comparing the first luminous intensity and the second luminous intensity; if the first luminous intensity is greater than the second luminous intensity, the relative vertical distance between the light sensor and the side of the luminous area corresponding to the first luminous intensity is greater than the relative vertical distance between the light sensor and the side of the luminous area corresponding to the second luminous intensity.

Optionally, after obtaining the coordinates of the center of the light sensor on the Y axis according to the first light intensity of each photosensitive sub-area and the second light intensity of each photosensitive sub-area; and obtaining the coordinates of the center of the light sensor on the X axis according to the third light intensity of each photosensitive sub-area and the fourth light intensity of each photosensitive sub-area, it further includes: controlling the position corresponding to the central coordinate of the light sensor under the screen of the display screen to be tested to emit light with different pixel areas; obtaining the detection intensity of the light sensor under the screen under each pixel area; and calculating the light leakage value of each pixel point in each pixel area according to the detection intensity of the light sensor under the screen under each pixel area.

Optionally, the light leakage value of each pixel in each pixel area is calculated according to the detection intensity of the light sensor under the screen under each pixel area, including: light leakage value of each pixel in each area = luminous intensity / Rn*Kn, where Rn is the number of pixels in each area, and Kn is the linearized value of the distance from the pixel in the area to the center.

Optionally, the coordinates of the center of the light sensor on the Y axis are obtained according to the first light intensity of each photosensitive sub-area and the second light intensity of each photosensitive sub-area, including: respectively calculating the ratio of the first light intensity of each photosensitive sub-area and the second light intensity of each photosensitive sub-area; comparing the ratio of each photosensitive sub-area in the same row in the X direction with a first preset ratio to obtain a first ratio parameter; and representing the coordinates of the center of the light sensor on the Y axis according to the length of the display area in the Y direction and the first ratio parameter.

Optionally, obtaining the coordinates of the center of the light sensor on the X-axis according to the third light intensity of each photosensitive sub-area and the fourth light intensity of each photosensitive sub-area includes: respectively calculating the ratio of the third light intensity of each photosensitive sub-area and the fourth light intensity of each photosensitive sub-area; comparing the ratio of each photosensitive sub-area in the same column in the Y direction with a second preset ratio to obtain a second ratio parameter; and expressing the coordinates of the center of the light sensor on the X-axis according to the length of the display area in the X-direction and the second ratio parameter.

Optionally, after obtaining the coordinates of the center of the light sensor on the Y-axis according to the first light intensity of each photosensitive area and the second light intensity of each photosensitive area; and obtaining the coordinates of the center of the light sensor on the X-axis according to the third light intensity of each photosensitive area and the fourth light intensity of each photosensitive area, the method further comprises: illuminating the photosensitive area on the first dividing line and detecting the fifth light intensity of the photosensitive area; and detecting the fifth light intensity of each photosensitive area according to the fifth light intensity of each photosensitive area. The light intensity is used to obtain the corrected coordinates of the light sensor on the X axis; the photosensitive area on the second dividing line is illuminated, and the sixth light intensity of the photosensitive area is detected; the corrected coordinates of the light sensor on the Y axis are obtained according to the sixth light intensity of each photosensitive area; the coordinates of the center of the light sensor on the X axis and the coordinates of the center of the light sensor on the Y axis are corrected according to the corrected coordinates on the X axis and the corrected coordinates on the Y axis to obtain the actual coordinate points.

其中，Xk為所述X軸上的修正座標，Xp為所述第一分割線上的第p個所述感光子區域的發光強度，p大於0，且小於n為整數；其中，第一分割線上的第1個所述感光子區域為與所述Y軸相鄰的所述感光子區域。 Optionally, obtaining the corrected coordinates of the light sensor on the X-axis according to the fifth light intensity of each of the photosensitive sub-areas includes: obtaining the corrected coordinates on the X-axis by a first calculation formula, wherein the first calculation formula includes:

Wherein, Xk is the corrected coordinate on the X-axis, Xp is the luminous intensity of the pth photosensitive area on the first dividing line, p is an integer greater than 0 and less than n; wherein, the first photosensitive area on the first dividing line is the photosensitive area adjacent to the Y-axis.

其中，Yk為所述Y軸上的修正座標，Ym為所述第二分割線上第m個所述感光子區域的發光強度，m大於0，且小於n為整數；其中，所述第二分割線上的第1個所述感光子區域為遠離所述X軸的所述感光子區域。 Optionally, obtaining the corrected coordinates of the light sensor on the Y axis according to the sixth light intensity of each of the photosensitive sub-areas includes: obtaining the corrected coordinates on the Y axis by a second calculation formula, wherein the second calculation formula includes:

Wherein, Yk is the corrected coordinate on the Y axis, Ym is the luminous intensity of the mth photosensitive area on the second dividing line, m is an integer greater than 0 and less than n; wherein, the first photosensitive area on the second dividing line is the photosensitive area far away from the X axis.

Optionally, after judging the horizontal installation quality of the light sensor according to the luminous intensity of each group of the luminous areas symmetrical about the center of the light sensor, it also includes: controlling the display screen to be tested not to emit light, and controlling the test light source to emit light with increasing light intensity in sequence, and synchronously detecting the light intensity of the test light source; obtaining the detection intensity of the light sensor under the screen, and accurately calibrating the light sensor under the screen according to the light intensity and the detection intensity.

Optionally, before obtaining the XY coordinate system of the display area plane of the display screen to be tested, it includes: controlling the test light source and the display screen to be tested to not emit light; and performing a light leakage test in the box according to the light intensity detected by the illumination unit.

Optionally, after performing the light leakage test in the box according to the light intensity detected by the illumination unit, it also includes: controlling the test light source to emit light with different duty cycles; and performing light source calibration according to the light intensity detected by the illumination unit.

In a fourth aspect, an embodiment of the present invention provides an electronic device, the electronic device comprising: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor, so that the at least one processor can execute the test method of the under-screen light sensor described in any embodiment of the present invention.

In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to implement the test method of the under-screen light sensor described in any embodiment of the present invention when the processor executes the computer instructions.

In a sixth aspect, an embodiment of the present invention provides a computer program product, characterized in that the computer program product includes a computer program, and when the computer program is executed by a processor, the computer program implements the test method of the under-screen light sensor according to any embodiment of the present invention.

The embodiment of the present invention arranges the illumination unit and the display screen bearing position to be tested on the circular light-transmitting area formed on the drawer-type placement plate in the circular light-guiding area, wherein one illumination unit is arranged at the center of the circular light-transmitting area, and the other illumination units and the display screen bearing position to be tested are arranged on the circumference of the circular light-transmitting area, so as to improve the consistency of the ambient light detected by the light sensor under the screen during the photosensitivity test. At the same time, the light sensor under the screen is placed in a light-shielding box, so as to avoid the influence of external light on the light leakage detection of the light sensor under the screen when the display screen to be tested is tested alone.

10: Light sensor

20: Glass protective layer

30: Touch screen sensor

40: Liquid crystal luminescent layer

2: Light-shielding box

3:Diffusion plate

4: Test light source

5:Light guide plate

7, 9: Illumination unit

8: Display screen loading position

11: Photosensitive area

12: Main control board

13: Main control unit

14: Drawer-style storage board

a: First dividing line

b: Second dividing line

LY1: First area

LY2: Second area

LX1: The third area

LX2: The fourth area

S110-S140, S210-S230, S310-S330, S410-S500: Steps

100: Electronic equipment

101:Processor

102: Read-only memory

103: Random Access Memory

104: Bus

105: Input/output (I/O) interface

106: Input unit

107: Output unit

108: Storage unit

109: Communication unit

Figure 1 is a schematic diagram of the structure of the light sensor under the LCD screen of a watch.

Figure 2 is a schematic diagram of the structure of a test system for an under-screen optical sensor provided by an embodiment of the present invention.

Figure 3 is a schematic diagram of a process for testing a light sensor under a screen according to an embodiment of the present invention.

Figure 4 is a schematic diagram of a coordinate system of a display screen to be tested provided in an embodiment of the present invention.

Figure 5 is a schematic diagram of the photosensitive area division of a light sensor according to an embodiment of the present invention.

Figure 6 is a schematic diagram showing the division of the first dividing line provided in an embodiment of the present invention.

Figure 7 is a schematic diagram showing a second dividing line display according to an embodiment of the present invention.

FIG8 is a schematic diagram of a method flow for obtaining the coordinates of the center of the light sensor on the Y-axis according to an embodiment of the present invention.

FIG9 is a schematic diagram of a method flow for obtaining the coordinates of the center of the optical sensor on the X-axis according to an embodiment of the present invention.

FIG10 is a schematic diagram of another method for testing an under-screen light sensor provided in an embodiment of the present invention.

Figure 11 is a schematic diagram of the light emitting position of the display screen to be tested according to an embodiment of the present invention.

Figure 12 is another schematic diagram of the light emitting position of the display screen to be tested provided in an embodiment of the present invention.

FIG13 shows a schematic diagram of the structure of an electronic device that can be used to implement an embodiment of the present invention.

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative labor are within the scope of protection of the present invention.

LCD screens are increasingly being used in wearable electronic devices. As a smartwatch LCD screen, an adaptive backlight brightness solution is very important. To prevent visual fatigue when using the LCD screen in different environments, the backlight brightness of the LCD screen should not be too bright or too dark, otherwise it will be difficult for users to recognize the displayed content. Therefore, the backlight brightness of the LCD screen of a smartwatch should be different under different environmental light intensities. This requires the use of automatic dimming technology, which allows the brightness of the watch's LCD screen to be automatically adjusted to the optimal state according to the ambient light intensity. In a bright environment, the LCD screen brightness is automatically adjusted to a brighter level, and in a dim environment, the LCD screen brightness is adjusted to a darker level. The user does not need to adjust it manually, so that the displayed image information can be clearer and more suitable for human eyes to watch.

In order to adjust the brightness of the screen according to the ambient light intensity, it is necessary to test the light leakage performance of the light sensor under the screen. The existing test system can usually only test the light leakage performance, but cannot detect the assembly position of the light sensor under the screen in the same device. The deviation of the assembly position usually affects the accuracy of the performance test.

FIG1 is a schematic diagram of the arrangement structure of the light sensor under the LCD screen of the watch. Referring to FIG1 , the LCD screen light sensor 10 is arranged below the LCD screen glass protection layer 20, the touch screen sensor 30 and the OLED liquid crystal light-emitting layer 40. When the LCD screen of the watch emits light, light leakage may occur, that is, part of the light will leak to the light sensor 10. After receiving the ambient light, the light sensor 10 calculates the external ambient light intensity and gives the external ambient light intensity to the LCD screen light-emitting control chip of the watch. The LCD screen light-emitting control chip of the watch adjusts the backlight brightness of the LCD screen of the watch according to the ambient light intensity to enhance the user's experience of using the watch. The higher the accuracy of the watch LCD light sensor 10 in detecting the ambient light intensity, the more accurately the watch LCD screen controls the LCD screen brightness, and the better the user experience. Therefore, the test system of the light sensor 10 needs to have the requirements of rapid detection of product quality during large-scale production, such as achieving assembly position, light sensitivity, light leakage and calibration detection requirements.

In view of this, FIG. 2 is a schematic diagram of the structure of a test system for an under-screen optical sensor provided by an embodiment of the present invention. This embodiment can be applied to the test of the under-screen optical sensor, and the system can be implemented in hardware and/or software. Referring to FIG. 2 , the system includes: a main control unit and a light sensor test device under the screen; the light sensor test device under the screen includes: a test light source 4 is arranged on the top of a light shielding box 2; a drawer-type placement board 14 is arranged at the bottom of the light shielding box 2; a uniform light guide plate 5 is arranged in the middle of the light shielding box 2, wherein the uniform light guide plate 5 includes a circular light guide area; the drawer-type placement board 14 includes: a plurality of illumination units 7 and a plurality of display screen bearing positions 8 to be tested; the illumination units 7 and the display screen bearing positions 8 to be tested are arranged in the circular light guide area in the drawer-type placement board 14. On the circular light-transmitting area formed on the plate 14, one illumination unit 7 is arranged at the center of the circular light-transmitting area, and the remaining illumination units 7 and the display screen to be tested support position 8 are arranged on the circumference of the circular light-transmitting area; the main control unit 13 is electrically connected to the test light source 4, the illumination unit 7 and the display screen to be tested provided on the display screen support position 8 through the main control board 12; the illumination unit 7 is used to detect the light intensity in the light-shielding box 2; the main control unit 13 is used to execute any test method of the light sensor under the screen in the embodiment of the present invention.

Specifically, a test light source 4 is arranged at the top of the light shielding box 2. The test light source 4 can control the luminous ratio by the luminous flux to enhance the versatility of the light source. For example, the test light source 4 can be a combination of multiple red lights, green lights, blue lights and white lights to form a uniform light source. The light emitted by the test light source 4 can be uniformly irradiated to the circular light-transmitting area through the uniform light guide plate 5. For example, the uniform light guide plate 5 can be made of acrylic material. Generally, the thicker the light guide plate, the better the light guiding effect. A drawer-type placement plate 14 is arranged at the bottom of the light shielding box 2 and can be movably drawn out. When the drawer-type placement plate 14 is put back into the light shielding box 2, a strict light shielding box 2 can be formed inside the light shielding box 2 to avoid light leakage into the light shielding box 2. An illumination unit 9 is arranged at the center of the circular light-transmitting area on the drawer-type placement board 14, and the remaining illumination units 7 are arranged on the circumference of the circular light-transmitting area. The light intensity detected by the illumination unit 7 at the center and the illumination unit 7 on the circumference can be used to judge whether the test light source 4 is uniform. The display screen holding position 8 to be tested is used to hold the display screen to be tested. The display screen holding position 8 to be tested is also arranged on the circumference of the circular light-transmitting area, so that during the photosensitivity test, the consistency of the ambient light detected by the light sensor 10 under the screen can be ensured. The main control unit 13 controls the luminous parameters of the display screen to be tested, obtains the detection light intensity of the light sensor 10 under the screen of the display screen to be tested, and determines the assembly position of the light sensor 10 under the screen according to the luminous parameters and the detection light intensity.

Exemplarily, the main control unit 13 may include a computer with data processing functions such as an industrial computer. It may also include external devices such as a liquid crystal display, a mouse and a keyboard. The audio and video interface and the peripheral interface of the industrial computer are connected to the liquid crystal display, the mouse and the keyboard through audio and video cables and USB cables respectively. The liquid crystal display is used as an input and output platform for human-computer interaction to display the test process and test results through the test program UI interface; the industrial computer is the hardware running platform of the test program, and the industrial computer is connected to the display screen to be tested through a USB cable, and USB communication is performed using the USB communication protocol; the industrial computer and the light sensor 10 test equipment under the handheld screen are connected to the factory production network server using an Ethernet cable for data transmission and interaction.

Based on the above embodiments, FIG3 is a flow chart of a method for testing a light sensor under a screen according to an embodiment of the present invention. The present embodiment can be applied to the assembly position test of the light sensor under a screen, and is executed by a test system for the light sensor under a screen. The device can be implemented in hardware and/or software. The method specifically includes the following steps: S110, obtaining an XY coordinate system of a display area plane of a display screen to be tested; Specifically, a plane XY coordinate system is established according to the display area of the display screen to be tested, so as to facilitate the coordinate calibration of the center position of the light sensor 10 under the screen. For example, FIG4 is a schematic diagram of a coordinate system of a display screen to be tested according to an embodiment of the present invention. Referring to FIG4 , a corner of the display screen to be tested is used as the origin of the coordinate system, and the adjacent sides are used as the X-axis and the Y-axis.

S120, dividing the photosensitive area of the light sensor under the screen into a plurality of photosensitive sub-areas according to the XY coordinate system, wherein the area of each photosensitive sub-area is equal; and the number of photosensitive sub-areas in the X direction and the Y direction of the XY coordinate system is equal, which is 2n+1, and n is greater than 0 and is an integer; specifically, the photosensitive area 11 of the light sensor 10 is evenly divided into a plurality of photosensitive sub-areas, wherein each photosensitive sub-area is a square area, and the number of photosensitive sub-areas in the X direction and the Y direction of the XY coordinate system is equal, that is, the sides of the photosensitive area 11 of the light sensor 10 are evenly divided, wherein the number of divisions is an odd number, such as 3, 5, 7, etc., so as to ensure that the actual center position of the light sensor 10 can fall on the central photosensitive sub-area. For example, FIG5 is a schematic diagram of a photosensitive area division of a light sensor according to an embodiment of the present invention. Referring to FIG5 , each side of the photosensitive area 11 of the light sensor 10 is divided into 3, that is, divided into 9 identical photosensitive sub-areas. For example, the area of each photosensitive sub-area is 5*5 pixels.

S130, controlling the display screen to be tested to emit light on one side of the first cutting line in the Y direction, and obtaining a first light intensity of each photosensitive sub-region; controlling the display screen to be tested to emit light on one side in the opposite direction of the first cutting line in the Y direction, and obtaining a second light intensity of each photosensitive sub-region; controlling the display screen to be tested to emit light on one side in the opposite direction of the second cutting line in the X direction, and obtaining a third ... The first dividing line is parallel to the X direction, and the second dividing line is parallel to the Y direction, and both pass through the center of the photosensitive area of the light sensor; specifically, the first dividing line and the second dividing line are display dividing lines of the display screen to be tested, and both the first dividing line and the second dividing line pass through the center of the photosensitive area of the light sensor 10. At this time, the center of the photosensitive area of the light sensor 10 is a known coordinate point provided by the supplier. Exemplarily, FIG. 6 provides a schematic diagram of a first dividing line display division for an embodiment of the present invention, and FIG. 7 provides a schematic diagram of a second dividing line display division for an embodiment of the present invention. In combination with FIG. 5, referring to FIG. 6 and FIG. 7, when the display screen to be tested is controlled to emit light on one side of the first dividing line a in the Y direction, that is, the first area LY1 emits light, and when the display screen to be tested is controlled to emit light on the other side of the first dividing line a in the Y direction, that is, the second area LY2 emits light. When the display screen to be tested is controlled to emit light on the side opposite to the X direction of the second dividing line b, that is, the third area LX1 emits light, and when the display screen to be tested is controlled to emit light on one side of the X direction of the second dividing line b, that is, the fourth area LX2 emits light. The first area LY1, the second area LY2, the third area LX1 and the fourth area LX2 are illuminated in sequence, and the first light intensity, the second light intensity, the third light intensity and the fourth light intensity of each photosensitive sub-area are obtained accordingly.

S140, obtain the coordinates of the center of the light sensor on the Y axis according to the first light intensity of each photosensitive sub-area and the second light intensity of each photosensitive sub-area; obtain the coordinates of the center of the light sensor on the X axis according to the third light intensity of each photosensitive sub-area and the fourth light intensity of each photosensitive sub-area.

Specifically, the light sensitivity at the center of the light sensor 10 under the screen covers a circular area. That is, the closer the pixel of the liquid crystal screen is to the light sensor 10, the greater the light intensity received by the light sensor 10. The light sensitivity of the light sensor 10 is related to the distance. Therefore, when the center position of the optical sensor 10 is offset from the known coordinate point provided by the supplier, the luminous intensity detected in the luminous area close to the optical sensor 10 is larger, and the luminous intensity detected in the luminous area far from the optical sensor 10 is smaller. Therefore, according to the proportional relationship between the first luminous intensity and the second luminous intensity, the coordinate on the Y axis can be calculated, and according to the proportional relationship between the third luminous intensity and the fourth luminous intensity, the coordinate on the X axis can be calculated. By comparing the coordinate with the provided assembly position of the optical sensor 10, it can be judged whether the quality of the assembly position of the optical sensor 10 meets the requirements.

The embodiment of the present invention divides the photosensitive area of the light sensor under the screen into multiple photosensitive sub-areas, controls the display screen to be tested to emit light in different areas along the first dividing line and the second dividing line, and utilizes the relationship between the light sensitivity intensity of the light sensor and the distance. According to the proportional relationship between the first light intensity and the second light intensity, and the proportional relationship between the third light intensity and the fourth light intensity, the assembly position of the light sensor can be inferred, thereby realizing the detection of the assembly position of the light sensor under the screen, increasing the test function, and at the same time, in the subsequent light leakage detection, there is no need to take out the display screen to be tested again, thereby improving the test efficiency.

至

的比值。 Based on the above embodiments, FIG8 is a schematic flow chart of a method for obtaining the coordinates of the center of the light sensor on the Y-axis according to an embodiment of the present invention, referring to FIG8 , including: S210, respectively calculating the ratio of the first light intensity of each photosensitive sub-area to the second light intensity of each photosensitive sub-area; specifically, for the convenience of explanation, taking the 9 photosensitive sub-areas in FIG5 as an example, in combination with FIG6 and FIG7 , when the first area LY1 emits light, the first dividing line a passes through the centers of the 4th photosensitive sub-area, the 5th photosensitive sub-area and the 6th photosensitive sub-area, and the first light intensities of the photosensitive sub-areas 1-9 are respectively recorded, and are respectively recorded as Y_N_1, Y_N_2, Y_N_3, Y_N_4, Y_N_5, Y_N_6, Y_N_7, Y_N_8 and Y_N_9. When the second area LY2 emits light, the second light intensity of the photosensitive sub-areas 1-9 is recorded respectively, and recorded as Y_S_1, Y_S_2, Y_S_3, Y_S_4, Y_S_5, Y_S_6, Y_S_7, Y_S_8, and Y_S_9. Among them, the light emission length of the first area LY1 in the Y direction is Y_N, and the light emission length of the second area LY2 in the Y direction is Y_S, then the length of the display area of the display screen to be tested in the Y direction is Yf=Y_N+Y_S. Calculate respectively

to

ratio.

、

和

，與第7個感光子區域、第8個感光子區域和第9個感光子區域的第一預 設比值率0-n相比；

、

和

，與第4個感光子區域、第5 個感光子區域和第6個感光子區域的第一預設比值率n-m相比；

、

和

，與第1個感光子區域、第2個感光子區域和第3個感光子區域的第一預設比值率m相比，從而得到對應的第一比值參數。 S220, compare the ratio of each photosensitive sub-area in the same row in the X direction with the first preset ratio to obtain a first ratio parameter; Specifically, a first preset ratio is set for each row of photosensitive sub-areas, and the first preset ratio is set based on multiple historical luminescence experiences. Therefore,

,

and

, compared with the first preset ratio 0-n of the 7th photosensitive sub-region, the 8th photosensitive sub-region and the 9th photosensitive sub-region;

,

and

, compared with the first preset ratio nm of the 4th photosensitive sub-region, the 5th photosensitive sub-region and the 6th photosensitive sub-region;

,

and

, compared with the first preset ratio m of the first photosensitive sub-region, the second photosensitive sub-region and the third photosensitive sub-region, thereby obtaining the corresponding first ratio parameter.

S230, and represent the coordinates of the center of the light sensor on the Y axis according to the length of the display area in the Y direction and the first ratio parameter.

Specifically, the coordinate of the center of the optical sensor 10 on the Y-axis can be expressed by the formula:

Among them, Yf is the length of the display area of the display screen to be tested in the Y direction, and the parameter "3" can be adjusted to the corresponding parameter according to the number of rows in the specific photosensitive area.

至

的比值。 Based on the above embodiments, FIG9 is a schematic flow chart of a method for obtaining the coordinates of the center of the light sensor on the X-axis according to an embodiment of the present invention, referring to FIG9 , including: S310, respectively calculating the ratio of the third light intensity of each photosensitive sub-area to the fourth light intensity of each photosensitive sub-area; specifically, for the convenience of explanation, taking the 9 photosensitive sub-areas in FIG5 as an example, in combination with FIG6 and FIG7 , when the third area LX1 emits light, the second dividing line b passes through the centers of the second photosensitive sub-area, the fifth photosensitive sub-area and the eighth photosensitive sub-area, and the third light intensity of the photosensitive sub-areas 1-9 are respectively recorded, and are respectively recorded as X_E_1, X_E_2, X_E_3, X_E_4, X_E_5, X_E_6, X_E_7, X_E_8, and X_E_9. When the fourth area LX2 emits light, the fourth light intensity of the photosensitive sub-areas 1-9 is recorded respectively, and recorded as X_W_1, X_W_2, X_W_3, X_W_4, X_W_5, X_W_6, X_W_7, X_W_8, and X_W_9. Among them, when the third area LX1 emits light, the light length in the X direction is X_E, and the light length in the X direction of the fourth area LX2 is X_W, then the length of the display area of the display screen to be tested in the X direction is Xf=X_E+X_W. Calculate respectively

to

ratio.

、

和

，與第3個感光子區域、第6個感光子區域和第9個感光子區域的第二預 設比值率0-h相比；

、

和

，與第2個感光子區域、第 5個感光子區域和第8個感光子區域的第二預設比值率h-g相比，

、

和

，與第1個感光子區域、第4個感光子區域和第7個感光子區域的第二預設比值率g相比；從而得到對應的第二比值參數。 S320, compare the ratio of each photosensitive sub-area in the same column in the Y direction with the second preset ratio to obtain a second ratio parameter; Specifically, a second preset ratio is set for each column of photosensitive sub-areas, and the second preset ratio is set based on multiple historical luminescence experiences. Therefore,

,

and

, compared with the second preset ratio rate 0-h of the 3rd photosensitive sub-region, the 6th photosensitive sub-region and the 9th photosensitive sub-region;

,

and

, compared with the second preset ratio hg of the 2nd photosensitive sub-region, the 5th photosensitive sub-region and the 8th photosensitive sub-region,

,

and

, compared with the second preset ratio rate g of the 1st photosensitive sub-region, the 4th photosensitive sub-region and the 7th photosensitive sub-region; thereby obtaining the corresponding second ratio parameter.

S330, and represent the coordinates of the center of the optical sensor on the X-axis according to the length of the display area in the X-direction and the second ratio parameter.

Specifically, the coordinate of the center of the optical sensor on the X-axis can be expressed by the formula:

Among them, Xf is the length of the display area of the display screen to be tested in the X direction, and the parameter "3" can be adjusted to the corresponding parameter according to the specific number of columns of the photosensitive sub-area.

Based on the above embodiment, optionally, after obtaining the coordinates of the center of the light sensor on the Y axis according to the first light intensity of each photosensitive sub-region and the second light intensity of each photosensitive sub-region; obtaining the coordinates of the center of the light sensor on the X axis according to the third light intensity of each photosensitive sub-region and the fourth light intensity of each photosensitive sub-region, the method further includes: emitting light to the photosensitive sub-region on the first dividing line and detecting the fifth light intensity of the photosensitive sub-region; and obtaining the coordinates of the center of the light sensor on the X axis according to the third light intensity of each photosensitive sub-region and the fourth light intensity of each photosensitive sub-region. The fifth light intensity of the light sensor 10 is used to obtain the corrected coordinates of the light sensor 10 on the X axis; the photosensitive area on the second dividing line is illuminated and the sixth light intensity of the photosensitive area is detected; the corrected coordinates of the light sensor 10 on the Y axis are obtained according to the sixth light intensity of each photosensitive area; the coordinates of the center of the light sensor 10 on the X axis and the coordinates of the center of the light sensor 10 on the Y axis are corrected according to the corrected coordinates on the X axis and the corrected coordinates on the Y axis to obtain the actual coordinate points.

其中，Xk為X軸上的修正座標，Xp為第一分割線a上的第p個感光子區域的發光強度，p大於0，且小於n為整數；其中，第一分割線a上的第1個感光子區域為與Y軸相鄰的感光子區域。因此光傳感器10的中心位置x軸的修 正座標

。 Specifically, based on the above embodiment, the center position coordinates (X1n, Y1n) of the light sensor 10 can be obtained, and then the photosensitive sub-area on the first dividing line a is illuminated, that is, in combination with Figure 5, the liquid crystal screens on the fourth photosensitive sub-area, the fifth photosensitive sub-area and the sixth photosensitive sub-area are controlled to emit light to form a track light on the X-axis. The fifth light intensity detected by the fourth photosensitive sub-area is X1, the fifth light intensity detected by the fifth photosensitive sub-area is X2, and the fifth light intensity detected by the sixth photosensitive sub-area is X3. Optionally, the corrected coordinates of the light sensor 10 on the X-axis are obtained according to the fifth light intensity of each photosensitive sub-area, including: obtaining the corrected coordinates on the X-axis through a first calculation formula, and the first calculation formula includes:

Where Xk is the corrected coordinate on the X axis, Xp is the light intensity of the pth photosensitive area on the first cutting line a, p is an integer greater than 0 and less than n; wherein the first photosensitive area on the first cutting line a is the photosensitive area adjacent to the Y axis. Therefore, the corrected coordinate of the center position of the optical sensor 10 on the x axis is

.

其中，Yk為Y軸上的修正座標，Ym為第二分割線b上第m個感光子區域的發光強度，m大於0，且小於n為整數；其中，第二分割線b上的第1個感光子區域為遠離X軸的感光子區域。因此光傳感器10的中心位置Y軸的修正 座標

。則螢幕下光傳感器10的中心位置x軸座標Xn=X1n+(1-Xk)*5,Yn=Y1n+(1-Yk)*5,，其中，參數“5”為感光子區域的一邊的像素個數，結合圖5，示例性的，選擇為5。比較供應商提供的光傳感器10中心位置理論座標與實際座標(Xn,Yn)偏差，確保螢幕下光傳感器10在液晶螢幕的相對座標位置品質滿足要求。 The photosensitive sub-area on the second dividing line b is illuminated, that is, in combination with FIG. 5, the liquid crystal screen on the second photosensitive sub-area, the fifth photosensitive sub-area and the eighth photosensitive sub-area is controlled to emit light, forming a track light emission on the Y axis, the sixth light intensity detected by the second photosensitive sub-area is Y1, the sixth light intensity detected by the fifth photosensitive sub-area is Y2, and the sixth light intensity detected by the eighth photosensitive sub-area is Y3. Optionally, the corrected coordinates of the light sensor 10 on the Y axis are obtained according to the sixth light intensity of each photosensitive sub-area, including: obtaining the corrected coordinates on the Y axis through a second calculation formula, and the second calculation formula includes:

Wherein, Yk is the corrected coordinate on the Y axis, Ym is the light intensity of the mth photosensitive area on the second dividing line b, m is an integer greater than 0 and less than n; wherein, the first photosensitive area on the second dividing line b is the photosensitive area far from the X axis. Therefore, the corrected coordinate of the Y axis of the center position of the optical sensor 10 is

Then the x-axis coordinates of the center position of the light sensor 10 under the screen are Xn=X1n+(1-Xk)*5, Yn=Y1n+(1-Yk)*5, where the parameter "5" is the number of pixels on one side of the photosensitive sub-area. In combination with FIG5 , 5 is selected as an example. Compare the deviation between the theoretical coordinates of the center position of the light sensor 10 provided by the supplier and the actual coordinates (Xn, Yn) to ensure that the relative coordinate position quality of the light sensor 10 under the screen meets the requirements on the liquid crystal screen.

FIG10 is a flow chart of another method for testing a light sensor under a screen according to an embodiment of the present invention, referring to FIG10 , comprising: S410, obtaining an XY coordinate system of a display area plane of a display screen to be tested; S420, dividing the light sensor photosensitive area under the screen into a plurality of photosensitive sub-areas according to the XY coordinate system, wherein each photosensitive sub-area has an equal area; and The number of photosensitive sub-areas in the X direction and the Y direction of the XY coordinate system is equal, that is, 2n+1, where n is greater than 0 and is an integer; S430, controlling the display screen to be tested to emit light on the side of the first dividing line in the Y direction, and obtaining the first light intensity of each photosensitive sub-area; controlling the display screen to be tested to emit light on the side of the first dividing line in the opposite direction of the Y direction, and obtaining the first light intensity of each photosensitive sub-area; The second light intensity of a photosensitive area; the display screen to be tested is controlled to emit light on the side opposite to the X direction of the second dividing line, and the third light intensity of each photosensitive area is obtained; the display screen to be tested is controlled to emit light on the side of the X direction of the second dividing line, and the fourth light intensity of each photosensitive area is obtained; wherein the first dividing line is parallel to the X direction, and the second dividing line is parallel to the Y direction, and both pass through the center of the photosensitive area of the light sensor; S440, according to the first light intensity of each photosensitive area and the second light intensity of each photosensitive area, the coordinate of the center of the light sensor on the Y axis is obtained; according to the third light intensity of each photosensitive area and the fourth light intensity of each photosensitive area, the coordinate of the center of the light sensor on the X axis is obtained.

S450, the photosensitive area on the first dividing line is illuminated, and the fifth light intensity of the photosensitive area is detected; and the corrected coordinates of the light sensor on the X axis are obtained according to the fifth light intensity of each photosensitive area; S460, the photosensitive area on the second dividing line is illuminated, and the sixth light intensity of the photosensitive area is detected; and the corrected coordinates of the light sensor on the Y axis are obtained according to the sixth light intensity of each photosensitive area; S470, the coordinates of the center of the light sensor on the X axis and the coordinates of the center of the light sensor on the Y axis are corrected according to the corrected coordinates on the X axis and the corrected coordinates on the Y axis to obtain the actual coordinate points. S480, controlling the display screen to be tested to form at least four light-emitting areas, wherein the light-emitting areas are arranged around the light sensor; the midpoint of each light-emitting area is at the same distance from the actual coordinate point, and the shape and area of each light-emitting area are the same; specifically, after the actual coordinates (Xn, Yn) of the liquid crystal screen light sensor 10 are detected, the test environment is kept as a dark environment, and the display screen to be tested is controlled to form at least four light-emitting areas around the assembly position for illumination, and the light-emitting areas are symmetrical about the actual coordinates and at the same distance from the actual coordinate points. FIG11 is a schematic diagram of the light emission position of the display screen to be tested according to an embodiment of the present invention. Referring to FIG11 , four pictures are exemplarily displayed. The four pictures are at the same equivalent distance and area from the light sensor 10. Therefore, the light emission of the liquid crystal screen pixels around the light sensor 10 leaking to the light sensor 10 is theoretically equal in light intensity.

S490, obtain the luminous intensity of each luminous area; S500, determine the installation level of the light sensor according to the luminous intensity.

Specifically, the luminous intensity of the four images is recorded as Lux-E, Lux-N, Lux-W and Lux-S respectively. When the relative vertical distance between the light sensor 10 and the LCD screen changes, that is, the light intensity of the LCD screen leaking to the light sensor 10 changes, for example, one side of the light sensor is high and the other side is low, then one side of the light sensor 10 is close to the screen and the other side is far away from the screen. Therefore, the light intensity received by the light sensor 10 close to the LCD screen is greater than the light intensity received far from the LCD screen. Therefore, according to the difference between the light intensity Lux-E and the light intensity Lux-W, and the difference between the light intensity Lux-N and the light intensity Lux-S, it can be judged whether the installation level quality of the light sensor 10 meets the requirements, thereby improving the consistency of the product.

Optionally, after judging the installation level of the light sensor 10 according to the light intensity, it also includes: Controlling the display screen to be tested not to emit light, and controlling the test light source 4 to emit light with increasing light intensity in sequence, and synchronously detecting the light intensity of the test light source 4; obtaining the detection intensity of the light sensor 10 under the screen, and calibrating the light sensor 10 under the screen according to the light intensity and the detection intensity.

Specifically, the LCD screen is controlled not to emit light, and then according to the light sensitivity curve of the LCD screen light sensor 10, the test light source 4 is controlled in turn to emit different white light intensities, such as LUX-50-W, LUX-100-W, LUX-150-W, LUX-200-W, LUX-300-W, LUX-500-W, LUX-800-W, and LUX-1000-W. At the same time, each illumination unit 7 and the display screen to be tested on the display screen loading position 8 synchronously detect the received light intensity. The test light source 4 needs to be calibrated before the test to ensure that each illumination unit 7 and the display screen to be tested are in the same plane and the light intensity is evenly distributed. The light intensity detected by the illumination unit 7 is compared with the light intensity detected by the light sensor 10 of the display screen to be tested. The light intensity of the illumination unit 7 is used as the calibration value. The light sensor 10 of the display screen to be tested calibrates its own parameters according to the calibration value. Exemplarily, the calibration process is that the light intensity detected by the illumination unit 7 is x, and x is equivalent to the standard light intensity value, but the actual value detected by the light sensor 10 may be y, and the y value needs to be calibrated to the x value, such as the proportional integration method y*m=x, m is the proportional calibration coefficient, and the calibrated parameter value is written into the internal memory, so that the light sensor 10 can detect the ambient light with better accuracy. Similarly, calibration is performed for different colored lights, for example, the test light source 4 is controlled to emit different set red light, green light and blue light intensities, so as to complete the calibration of the light sensor 10 for the ambient red light, green light and blue light.

When the user uses the watch product, the LCD screen is on. The brightness read by the light sensor 10 of the LCD screen includes not only the external light but also the light emitted by the LCD screen itself, i.e., light leakage. The light leakage is the light emitted by the LCD screen that leaks onto the light sensor 10. Therefore, after the light sensor 10 detects the assembly position and levelness quality, it is necessary to detect the light leakage of the LCD screen of the watch.

Optionally, after obtaining the detection intensity of the light sensor 10 under the screen, the light sensor 10 under the screen is accurately calibrated according to the illumination intensity and the detection intensity, and then, it also includes: controlling the test light source 4 not to emit light, controlling the assembly position of the display screen to be tested around the light sensor 10 under the screen to emit light with different pixel areas; obtaining the detection intensity of the light sensor 10 under the screen under each pixel area, and obtaining the light leakage value of each pixel point in each pixel area according to the detection intensity of the light sensor 10 under the screen under each pixel area.

Specifically, in order to accurately obtain the brightness of the external ambient light, it is necessary to subtract the light leakage of the display screen itself, so as to obtain the light leakage value of each pixel on the liquid crystal screen. The closer the pixel is to the light sensor 10, the greater the light leakage detection value, and the farther the pixel is, the smaller the light leakage detection value. Each pixel in the liquid crystal screen is illuminated individually to obtain the light leakage intensity of the pixel, which has the best accuracy, but the number of pixels is very large, so the test time is long, which seriously reduces the test efficiency. Therefore, according to the actual coordinates of the center point of the light sensor 10, the distance between the pixel of the liquid crystal screen and the actual coordinates is linearly calculated, and the pixel luminous area of the liquid crystal screen is tested, which can greatly reduce the test time, and at the same time, the light leakage accuracy of the pixel also meets the requirements. FIG12 is another schematic diagram of the light-emitting position of the display screen to be tested provided in an embodiment of the present invention. Referring to FIG12 , the pixels on the screen are divided into several areas, including 9 pixels within the actual center of the light sensor 10, 9-13 pixels, 13-19 pixels, 19-29 pixels, 29-71 pixels, and pixels of the entire screen. The distance between the pixel points in the region and the actual coordinate point is linearized. For example, when less than 9 pixels emit light, the detection intensity of the light leakage detected by the light sensor 10 is LUX-9, then the light leakage value of each pixel point in the region = LUX-9/Rn*Kn, where Rn is the number of pixels in each region, and Kn is the linearized value of the distance between the pixel points in the region and the center. Thus, the light leakage value of each pixel point to the light sensor 10 when the LCD screen emits white light can be tested and calculated. The light emitted by the LCD screen is a combination of the three primary colors of red light, blue light and green light, so it is necessary to measure the light leakage value of each pixel point of the watch LCD screen in red light, blue light and green light. Detection of light leakage value of each pixel of the full-screen red light of the LCD screen: Control the test light source 4 not to emit light, control the full-screen red light of the LCD screen, and use the light sensor 10 to detect the light leakage value LUX_full_R of the full-screen red light. Calculate the light leakage value of each pixel of the LCD screen when it emits red light, and write the light leakage value of each pixel into the memory; Detection of light leakage value of each pixel of the full-screen green light of the LCD screen: Control the test light source 4 not to emit light, control the full-screen green light of the LCD screen, and use the light sensor 10 to detect the light leakage value of each pixel of the full-screen green light. The light leakage value LUX_full_G of the green light of the LCD screen is calculated, the light leakage value of each pixel of the LCD screen when emitting green light is calculated, and the light leakage value of each pixel is written into the memory; the light leakage value detection of each pixel of the full-screen blue light of the LCD screen: the test light source 4 is controlled not to emit light, the full-screen of the LCD screen is controlled to emit blue light, the light sensor 10 detects the light leakage value LUX_full_B of the full-screen blue light, the light leakage value of each pixel of the LCD screen when emitting blue light is calculated, and the light leakage value of each pixel is written into the memory. When the light sensor 10 detects the ambient light minus the light leakage value of each pixel of the LCD screen, the actual value of the ambient light intensity is obtained. The LCD screen adjusts the light intensity of each pixel of the LCD screen according to the ambient light intensity, which greatly improves the user experience.

In order to ensure that the entire test process is free from the influence of external ambient light, the entire process needs to be completed inside the light shielding box 2, so the light leakage value inside the light shielding box needs to be detected before the test. Therefore, before obtaining the XY coordinate system of the display area plane of the display screen to be tested, it includes: controlling the test light source and the display screen to be tested to not emit light; and performing light leakage calibration inside the box according to the light intensity detected by the illumination unit.

Specifically, the test light source 4 and the display screen to be tested are controlled not to emit light. At this time, the display screen to be tested and the illumination unit 7 are in the same dark environment. At the same time, the light intensity in the dark environment is detected. If the light intensity detected by the illumination unit 7 is close to 0lux, it means that there is no light leakage in the light shielding box 2. If the light intensity detected by the illumination unit 7 is greater than 0lux and exceeds the preset threshold, it means that there is light leakage in the light shielding box 2, and the light leakage in the box needs to be calibrated.

After a certain period of use, the color temperature and illumination of any light source will shift to varying degrees. This error is often caused by the aging of the LED lamp beads themselves. Once the error of the light source exceeds the normal range, the detection result in the optical environment loses its value. Therefore, it is necessary to calibrate the test light source 4 inside the test equipment of the light sensor 10 under the screen for uniform consistency. In view of this, optionally, after performing the light leakage calibration in the box according to the light intensity detected by the illumination unit 7, it also includes: controlling the test light source to emit light with different duty cycles; calibrating the light source according to the light intensity detected by the illumination unit.

Specifically, the test light source 4 is controlled to emit light at different duty ratios. For example, the duty ratio can be set to 10%, 20%, 30%, 40%, and 50% respectively. At this time, each illumination unit 7 is on the circumference of the same plane. The R red light, G green light, B blue light, and white light emitted by the test light source 4 are detected in different colors and different light intensity values to ensure the accuracy consistency of each illumination unit 7 and the light intensity consistency of the light source, thereby calibrating the light source and reducing the problem of weakening the light of the test light source 4 after using it for a period of time. The light intensity of the test light source 4 is controlled to be consistent with the test requirement value through negative feedback of the illumination unit 7, so that the light intensity received by the light sensor 10 and the illumination unit 7 is consistent.

The embodiment of the present invention also provides a test device for the light sensor 10 under the screen, and further referring to FIG. 2, the device comprises: a light shielding box 2, a test light source 4 is arranged on the top of the light shielding box 2; a drawer-type placement plate 14 is arranged on the bottom of the light shielding box 2; a uniform light guide plate 5 is arranged in the middle of the light shielding box 2, wherein the uniform light guide plate 5 includes a circular light guide area; the drawer-type placement plate 14 includes: Multiple illumination units 7 and multiple display screen bearing positions 8 to be tested; the illumination units 7 and the display screen bearing positions 8 to be tested are arranged on the circular light-transmitting area formed by the circular light-guiding area on the drawer-type placement plate 14, wherein one illumination unit 7 is arranged at the center of the circular light-transmitting area, and the remaining illumination units 7 and the display screen bearing positions 8 to be tested are arranged on the circumference of the circular light-transmitting area.

Specifically, a test light source 4 is arranged at the top of the light shielding box 2. The test light source 4 can control the luminous ratio by the luminous flux to enhance the versatility of the light source. For example, the test light source 4 can be a combination of multiple red lights, green lights, blue lights and white lights to form a uniform light source. The light emitted by the test light source 4 can be uniformly irradiated to the circular light-transmitting area through the uniform light guide plate 5. For example, the uniform light guide plate 5 can be made of acrylic material. Generally, the thicker the light guide plate, the better the light guiding effect. A drawer-type placement plate 14 is arranged at the bottom of the light shielding box 2 and can be movably drawn out. When the drawer-type placement plate 14 is put back into the light shielding box 2, a strict light shielding box 2 can be formed inside the light shielding box 2 to avoid light leakage into the light shielding box 2. An illumination unit 7 is arranged at the center of the circular light-transmitting area on the drawer-type placement plate 14, and the remaining illumination units 7 are arranged on the circumference of the circular light-transmitting area. The light intensity detected by the illumination unit 7 at the center and the illumination unit 7 on the circumference can be used to judge whether the test light source 4 is uniform. The display screen to be tested supporting position 8 is used to support the display screen to be tested, and the display screen to be tested supporting position 8 is also arranged on the circumference of the circular light-transmitting area, so that during the photosensitivity test, the consistency of the ambient light detected by the light sensor 10 under the screen can be ensured. At the same time, the light sensor 10 under the screen is placed in the light shielding box 2 to prevent the influence of external light on the light leakage detection of the light sensor 10 under the screen when the display screen to be tested is illuminated alone for testing.

The design of the test light source 4 of the test equipment for the light sensor under the screen needs to consider the parameters of illumination, color temperature, and uniformity, which are the basis of the design of the entire device. Therefore, the embodiment of the present invention also provides a test light source for the test equipment for the light sensor under the screen. The test light source 4 includes: a white light source, a red light source, a green light source, and a blue light source; wherein the test light source 4 is arranged in a circular plane light panel in the order of white light source W, red light source R, green light source G, and blue light source B.

Specifically, in order to overcome the decrease in the light intensity and color accuracy of the color temperature and illumination of the test light source 4, the test light source 4 is an annular plane light panel composed of a plurality of white light sources W, a red light source R, a green light source G and a blue light source B. Optionally, a diffusion plate 3 is arranged between the test light source 4 and the uniform light guide plate 5. The light emitted by the test light source 4 passes through the diffusion plate 3, and then passes through the circular uniform light guide plate 5, so that the light is uniformly and vertically irradiated on the drawer-type placement plate 14. The illumination unit 7 on the drawer-type placement plate 14 detects the parameters such as the light intensity and color temperature of the test light source 4, and sends the light intensity and color temperature values to the main control unit 13. The main control unit 13 determines whether the illumination is uniform according to the light intensity of the illumination unit 7 that is not on the same straight line. When the light intensity deviation detected by the illumination unit 7 is not within the specified range, the light intensity emitted by the test light source 4 is uneven.

According to the internationally accepted color temperature standard CIE1931 color gamut diagram formulated by the International Commission on Illumination (CIE), the XYZ coordinates are converted into xy chromaticity coordinates: Xm=Xm/(Xm+Ym+Zm), Ym=Ym/(Xm+Ym+Zm), Zm=Zm/(Xm+Ym+Zm). Combining the Glashmann color mixing law, additive color mixing principle, and CIE chromaticity calculation method, the proportion of the three primary colors is DrDgDb. The chromaticity coordinates of the mixed red light source R, green light source G and blue light source B satisfy: Xm=Xm/(Xm+Ym+Zm)=(CrDrXr+CgDgXg+CbDbXb)/(CrDr+CgDg+CbDb), Ym=Ym/(Xm+Ym+Zm)=(CrDrYr+CgDgYg+CbDbYb)/(CrDr+CgDg+CbDb) , where Xm, Ym, Zm are the three stimulus values of the mixed light source M, Yr, Yg, Yb are the Ym stimulus values of the light source RGB, and the parameters Cr, Xr, Cg, Xg, Cb, and Xb are the RGB three-color mixing principle defined by Grassmann. In the CIE-1931 standard colorimetric system, the Ym stimulus value is equal to the luminous flux, so the ratio of the three colors can be controlled by controlling the luminous flux (brightness).

In order to further enhance the versatility of the light source, the color temperature of the light source is designed into four adjustable ranges: 2900K~3500K, 3500K~4200K, 4200K~5300K and 5300K~6000K. The light source uses four white light sources, each corresponding to a color temperature range. White light source W is composed of the same number of 2900K and 3500K color temperature LEDs. These two lamp beads can match any color temperature in the range of 2900K~3500K, and the same is true for the remaining adjustable color temperatures. In order to make the color temperature transition smooth, each high and low color temperature LED is arranged at intervals. In addition to the four white light sources used for lighting, lamp beads for calibrating color temperature or color coordinates are also required. In the color temperature range of 2900K~6000K, the lower the color temperature, the more dominant the red light component is, and the higher the color temperature, the more dominant the green light component is. The same is true for color coordinates. It can be seen that adjusting the red and green light components can change the color temperature or color coordinates. Therefore, red and green lamp beads are used for calibration. These two lamp beads are also arranged at intervals. In order to make the light more uniform, an acrylic light guide plate is placed on the light source. Generally, the thicker the light guide plate, the better the light guiding effect. In addition, a diffusion plate is placed above the light guide plate to give the light source a better exit angle. The main control unit 13 drives multiple 4-channel pulse width modulation (PWM) through the light source driver 1 to adjust the conduction duty cycle of the white light source, red light source, green light source and blue light source LED beads of the test light source 4 to control the color temperature and brightness. The main control unit 13 adjusts and controls the duty cycle of the LED beads of the red light source R, green light source G and blue light source B according to the color temperature and brightness values fed back by the coordinate position of the illumination unit 7, so that the light intensity received by the light sensor 10 on each circumference is consistent. The luminous parameters of the test light source 4 are controlled through negative feedback of the illumination unit 7, which overcomes the color temperature and brightness deviation of the traditional light source after a period of use, improves the color temperature and brightness uniformity of the light emitted by the test light source 4, and improves the test accuracy.

Each time the test light source 4 is used, the light irradiation uniformity is adjusted through the detection value of the illumination unit 7, and the illumination, color temperature, color coordinates and other parameters are calibrated with higher precision. The calibrated light source is used to simulate the ambient light sensitivity test of the LCD screen.

FIG. 13 shows a schematic diagram of the structure of an electronic device 100 that can be used to implement an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptops, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframes, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and/or required herein.

As shown in FIG13 , the electronic device 100 includes at least one processor 101, and a storage device such as a read-only memory (ROM) 102, a random access memory (RAM) 103, etc., which is communicatively connected to the at least one processor 101. The storage device stores a computer program that can be executed by at least one processor, and the processor 101 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 102 or the computer program loaded from the storage unit 108 to the random access memory (RAM) 103. In the RAM 103, various programs and data required for the operation of the electronic device 100 can also be stored. The processor 101, ROM 102, and RAM 103 are connected to each other via a bus 104. An input/output (I/O) interface 105 is also connected to the bus 104.

Multiple components in the electronic device 100 are connected to the I/O interface 105, including: an input unit 106, such as a keyboard, a mouse, etc.; an output unit 107, such as various types of displays, speakers, etc.; a storage unit 108, such as a disk, an optical disk, etc.; and a communication unit 109, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 109 allows the electronic device 100 to exchange information/data with other devices through a computer network such as the Internet and/or various telecommunication networks.

Processor 101 may be a variety of general and/or specialized processing components with processing and computing capabilities. Some examples of processor 101 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. Processor 101 executes the various methods and processes described above, such as the test method of the light sensor under the screen.

In some embodiments, the test method of the light sensor under the screen can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 108. In some embodiments, part or all of the computer program can be loaded and/or installed on the electronic device 100 via the ROM 102 and/or the communication unit 109. When the computer program is loaded into the RAM 103 and executed by the processor 101, one or more steps of the test method of the light sensor under the screen described above can be executed. Alternatively, in other embodiments, the processor 101 can be configured to execute the test method of the light sensor under the screen by any other appropriate means (for example, by means of firmware).

Various implementations of the systems and techniques described above may be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system on a chip (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various implementations may include: implementation in one or more computer programs that can be executed and/or interpreted on a programmable system including at least one programmable processor, which can be a dedicated or general-purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable data processing device so that when the computer program is executed by the processor, the functions/operations specified in the flowchart and/or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. Computer-readable storage media may include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media would include an electrical connection based on one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with a user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and the input from the user may be received in any form (including acoustic input, voice input, or tactile input).

The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

A computing system may include clients and servers. Clients and servers are generally remote from each other and usually interact through a communication network. The client-server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in the present invention can be executed in parallel, in sequence or in different orders, as long as the expected results of the technical solution of the present invention can be achieved, and this article does not limit it here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions described in the above embodiments, or replace some of the technical features with equivalent ones. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

2: Light-shielding box

3: Diffusion plate

4: Test light source

5:Light guide plate

7, 9: Illumination unit

8: Display screen loading position

12: Main control board

13: Main control unit

14: Drawer-style storage board

Claims (19)

A test device for an optical sensor under a screen comprises: a light shielding box, at least one test light source is arranged on the top of the light shielding box; a drawer-type placement board is arranged at the bottom of the light shielding box; a uniform light guide plate is arranged in the middle of the light shielding box, wherein the uniform light guide plate comprises a circular light guide area; The drawer-type placement board comprises: a plurality of illumination units and a plurality of display screen bearing positions to be tested; the illumination units and the display screen bearing positions to be tested are arranged on a circular light-transmitting area formed on the drawer-type placement board in the circular light-guide area, wherein one illumination unit is arranged at the center of the circular light-transmitting area, and the remaining illumination units and the display screen bearing positions to be tested are arranged on the circumference of the circular light-transmitting area. The under-screen light sensor testing equipment as described in claim 1, wherein the at least one test light source includes: a white light source, a red light source, a green light source and a blue light source; wherein the at least one test light source is arranged in a circular planar light panel in the order of the white light source, the red light source, the green light source and the blue light source. The under-screen light sensor testing equipment as described in claim 1 further includes a diffusion plate; the diffusion plate is arranged between the test light source and the uniform light guide plate. A test system for a light sensor under a screen, comprising: a main control unit and a light sensor test device under a screen as described in any one of claim items 1 to 3; The main control unit is electrically connected to the test light source, the illumination unit and the display screen to be tested arranged on the display screen support position to be tested through a main control board; the illumination unit is used to detect the light intensity in the light shielding box; The main control unit controls the luminous parameters of the display screen to be tested, and obtains the detection light intensity of the light sensor under the screen of the display screen to be tested, and determines the assembly position of the light sensor under the screen according to the luminous parameters and the detection light intensity. A method for testing an under-screen optical sensor, which is performed by the under-screen optical sensor testing system described in claim 4, comprising: Obtaining an XY coordinate system of the display area plane of the display screen to be tested; Dividing the photosensitive area of the under-screen optical sensor into a plurality of photosensitive sub-areas according to the XY coordinate system, wherein each of the photosensitive sub-areas has an equal area; and the number of the photosensitive sub-areas in the X direction and the Y direction of the XY coordinate system is equal, and the number is 2n+1, where n is greater than 0 and is an integer; Control the display screen to be tested to emit light on one side of the first dividing line in the Y direction, and obtain the first light intensity of each photosensitive sub-area; control the display screen to be tested to emit light on the side opposite to the Y direction of the first dividing line, and obtain the second light intensity of each photosensitive sub-area; control the display screen to be tested to emit light on the side opposite to the X direction of the second dividing line, and obtain the third light intensity of each photosensitive sub-area; control the display screen to be tested to emit light on one side of the X direction of the second dividing line, and obtain the fourth light intensity of each photosensitive sub-area; wherein the first dividing line is parallel to the X direction, the second dividing line is parallel to the Y direction, and both pass through the center of the photosensitive area of the light sensor; Obtain the coordinates of the center of the light sensor on the Y axis according to the first light intensity of each photosensitive area and the second light intensity of each photosensitive area; obtain the coordinates of the center of the light sensor on the X axis according to the third light intensity of each photosensitive area and the fourth light intensity of each photosensitive area; Control the display screen to be tested to form at least four light-emitting areas, wherein the light-emitting areas are arranged around the light sensor; the midpoint of each light-emitting area is at the same distance from the center of the light sensor, and each light-emitting area has the same shape and area; Obtain the light intensity of each light-emitting area; Determine the horizontal installation quality of the light sensor according to the light intensity of each group of light-emitting areas symmetrical about the center of the light sensor. The test method of the light sensor under the screen as described in claim 5, wherein the horizontal installation quality of the light sensor is judged according to the light intensity of each group of the light-emitting areas symmetrical about the center of the light sensor, including: The light intensity of each group of the light-emitting areas is respectively a first light intensity and a second light intensity, and the first light intensity and the second light intensity are compared; If the first light intensity is greater than the second light intensity, the relative vertical distance between the light sensor and the side of the light-emitting area corresponding to the first light intensity is greater than the relative vertical distance between the light sensor and the side of the light-emitting area corresponding to the second light intensity. The method for testing the under-screen light sensor as described in claim 5, wherein, after obtaining the coordinates of the center of the light sensor on the Y axis according to the first light intensity of each photosensitive sub-area and the second light intensity of each photosensitive sub-area; and obtaining the coordinates of the center of the light sensor on the X axis according to the third light intensity of each photosensitive sub-area and the fourth light intensity of each photosensitive sub-area, it also includes: Controlling the position corresponding to the central coordinate of the under-screen light sensor of the under-screen to be tested to emit light with different pixel areas; Obtaining the detection intensity of the under-screen light sensor under each pixel area; And calculating the light leakage value of each pixel point in each pixel area according to the detection intensity of the under-screen light sensor under each pixel area. As described in claim 7, the test method of the under-screen light sensor, wherein the light leakage value of each pixel in each pixel area is calculated according to the detection intensity of the under-screen light sensor under each pixel area, including: The light leakage value of each pixel in each area = luminous intensity / Rn*Kn, where Rn is the number of pixels in each area, and Kn is the linearized value of the distance from the pixel in the area to the center. The method for testing the light sensor under the screen as described in claim 5, wherein the coordinates of the center of the light sensor on the Y axis are obtained according to the first light intensity of each photosensitive area and the second light intensity of each photosensitive area, including: Calculating the ratio of the first light intensity of each photosensitive area and the second light intensity of each photosensitive area respectively; Comparing the ratio of each photosensitive area in the same row in the X direction with a first preset ratio to obtain a first ratio parameter; And representing the coordinates of the center of the light sensor on the Y axis according to the length of the display area in the Y direction and the first ratio parameter. The method for testing the light sensor under the screen as described in claim 5, wherein the coordinates of the center of the light sensor on the X-axis are obtained according to the third light intensity of each photosensitive area and the fourth light intensity of each photosensitive area, including: Calculating the ratio of the third light intensity of each photosensitive area and the fourth light intensity of each photosensitive area respectively; Comparing the ratio of each photosensitive area in the same column in the Y direction with a second preset ratio to obtain a second ratio parameter; And representing the coordinates of the center of the light sensor on the X-axis according to the length of the display area in the X direction and the second ratio parameter. The method for testing the light sensor under the screen as described in claim 5, wherein, after obtaining the coordinates of the center of the light sensor on the Y axis according to the first light intensity of each photosensitive area and the second light intensity of each photosensitive area; and obtaining the coordinates of the center of the light sensor on the X axis according to the third light intensity of each photosensitive area and the fourth light intensity of each photosensitive area, the method comprises: emitting light from the photosensitive area on the first dividing line and detecting the fifth light intensity of the photosensitive area; and obtaining the corrected coordinates of the light sensor on the X axis according to the fifth light intensity of each photosensitive area; The photosensitive sub-area on the second dividing line emits light, and the sixth light intensity of the photosensitive sub-area is detected; the corrected coordinates of the light sensor on the Y axis are obtained according to the sixth light intensity of each photosensitive sub-area; According to the corrected coordinates on the X axis and the corrected coordinates on the Y axis, the coordinates of the center of the light sensor on the X axis and the coordinates of the center of the light sensor on the Y axis are corrected to obtain the actual coordinate points. The method for testing the under-screen light sensor as claimed in claim 11, wherein obtaining the corrected coordinates of the light sensor on the X-axis according to the fifth light intensity of each of the photosensitive sub-areas comprises: obtaining the corrected coordinates on the X-axis by a first calculation formula, wherein the first calculation formula comprises: ; Wherein, Xk is the corrected coordinate on the X-axis, Xp is the luminous intensity of the p-th photosensitive area on the first dividing line, p is an integer greater than 0 and less than n; wherein, the first photosensitive area on the first dividing line is the photosensitive area adjacent to the Y-axis. The method for testing the under-screen light sensor as claimed in claim 11, wherein obtaining the corrected coordinates of the light sensor on the Y axis according to the sixth light intensity of each of the photosensitive sub-areas comprises: obtaining the corrected coordinates on the Y axis by a second calculation formula, wherein the second calculation formula comprises: ; Wherein, Yk is the corrected coordinate on the Y-axis, Ym is the luminous intensity of the mth photosensitive area on the second dividing line, m is greater than 0 and less than n and is an integer; wherein, the first photosensitive area on the second dividing line is the photosensitive area farthest from the X-axis. The method for testing the light sensor under the screen as described in claim 5, wherein, after judging the horizontal quality and installation quality of the light sensor according to the luminous intensity of each group of the luminous areas symmetrical about the center of the light sensor, it also includes: Controlling the display screen to be tested not to emit light, and controlling the test light source to emit light with increasing light intensity in sequence, and synchronously detecting the light intensity of the test light source; Obtaining the detection intensity of the light sensor under the screen, and calibrating the accuracy of the light sensor under the screen according to the light intensity and the detection intensity. The test method of the light sensor under the screen as described in claim 5, wherein, before obtaining the XY coordinate system of the display area plane of the display screen to be tested, it includes: Controlling the test light source and the display screen to be tested to not emit light; Performing a light leakage test in the box according to the light intensity detected by the illumination unit. The method for testing the light sensor under the screen as described in claim 5, wherein, after performing the light leakage test in the box according to the light intensity detected by the illumination unit, it also includes: Controlling the test light source to emit light with different duty cycles; Performing light source calibration according to the light intensity detected by the illumination unit. An electronic device, comprising: At least one processor; and A memory connected to the at least one processor in communication; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the test method of the under-screen light sensor described in any one of claim items 5-16. A computer-readable storage medium stores computer instructions, wherein the computer instructions are used to enable a processor to implement the method for testing an under-screen optical sensor as described in any one of claims 5-16 when executed. A computer program product, comprising a computer program, which, when executed by a processor, implements a method for testing an under-screen light sensor as described in any one of claims 5-16.

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