WO2020133814A1 - 一种oled屏下摄像头的光补偿方法及装置 - Google Patents

一种oled屏下摄像头的光补偿方法及装置 Download PDF

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Publication number
WO2020133814A1
WO2020133814A1 PCT/CN2019/082965 CN2019082965W WO2020133814A1 WO 2020133814 A1 WO2020133814 A1 WO 2020133814A1 CN 2019082965 W CN2019082965 W CN 2019082965W WO 2020133814 A1 WO2020133814 A1 WO 2020133814A1
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Prior art keywords
light intensity
camera
light
external light
compensation
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PCT/CN2019/082965
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English (en)
French (fr)
Inventor
欧阳齐
周阳
金武谦
赵勇
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武汉华星光电半导体显示技术有限公司
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Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US16/496,423 priority Critical patent/US11375129B2/en
Publication of WO2020133814A1 publication Critical patent/WO2020133814A1/zh

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/72—Combination of two or more compensation controls
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits

Definitions

  • the invention relates to the technical field of display panels, in particular to an optical compensation method and device for a camera under an OLED screen.
  • the OLED display technology is different from the traditional LCD display method. No backlight is required, and a very thin organic material coating and glass substrate are used. When an electric current passes, these organic materials will emit light. Moreover, the OLED display screen can be made lighter and thinner, the viewing angle of OLED technology development is greater, and it can significantly save power.
  • the substrate of the flexible OLED screen is itself a "transparent plastic"
  • the light transmittance of the screen needs to be at least 80%, but the current The technology can only achieve about 40%, which makes the light intensity received by the camera under the screen weaker, which is not conducive to imaging.
  • Embodiments of the present application provide an optical compensation method and device for a camera under an OLED screen, to solve the problem that the light intensity received by the existing camera under a screen is weak and is not conducive to imaging.
  • An embodiment of the present application provides an optical compensation method for a camera under an OLED screen, including:
  • the external light intensity is the light intensity of the external light passing through the screen to the camera;
  • Detecting whether the external light intensity can image the camera, and using the internal light of the screen or the sensor of the camera to compensate the external light intensity according to the detection result.
  • the detecting whether the external light intensity can image the camera specifically includes:
  • the use of internal light on the screen or the sensor of the camera to compensate the external light intensity according to the detection result specifically includes:
  • the internal light of the screen is used to compensate the external light intensity, so that the compensated light intensity can image the camera;
  • the sensor of the camera is used to compensate the external light intensity, so that the compensated light intensity is within the actual light intensity range of the external light.
  • screen internal light to compensate the external light intensity specifically includes:
  • the internal light intensity is the light intensity of the internal light passing through the screen to the camera.
  • the internal light is light emitted by the pixel unit inside the screen
  • the adjustment of the internal light intensity to a preset light intensity threshold specifically includes:
  • the driving current of the pixel unit is adjusted to adjust the internal light intensity to the preset light intensity threshold.
  • the sensor using the camera to compensate the external light intensity specifically includes:
  • the compensation light of the sensor of the camera is turned on, and the light intensity of the compensation light is adjusted to the light intensity compensation range to realize the compensation of the external light intensity.
  • the calculation of the light intensity compensation range according to the external light intensity and the screen transmittance specifically includes:
  • the light intensity compensation range is calculated and obtained according to the actual light intensity range of the external light and the external light intensity.
  • A' is the external light intensity
  • Z is the light intensity compensation range
  • A is the actual light intensity of the external light
  • (0.9 ⁇ 1) A is the actual light intensity range of the external light.
  • An embodiment of the present application provides an optical compensation device for a camera under an OLED screen.
  • the device includes:
  • An external light intensity obtaining module configured to obtain the external light intensity sensed by the off-screen camera only under external light; the external light intensity is the light intensity of the external light passing through the screen to the camera;
  • a detection module configured to detect whether the external light intensity can image the camera
  • the compensation module is used for compensating the external light intensity using screen internal light or the sensor of the camera according to the detection result.
  • the detection module is specifically used for:
  • the compensation module specifically includes:
  • the first compensation unit is used to compensate the external light intensity with the internal light of the screen when the external light intensity cannot image the camera, so that the compensated light intensity can image the camera;
  • the second compensation unit is used to compensate the external light intensity by using the sensor of the camera when the external light intensity can image the camera, so that the compensated light intensity is located in the actual external light Within the range of light intensity.
  • the first compensation unit is also used to:
  • the internal light intensity is the light intensity of the internal light passing through the screen to the camera.
  • the internal light is light emitted by the pixel unit inside the screen
  • the first compensation unit is also used to:
  • the driving current of the pixel unit is adjusted to adjust the internal light intensity to the preset light intensity threshold.
  • the second compensation unit is also used to:
  • the compensation light of the sensor of the camera is turned on, and the light intensity of the compensation light is adjusted to the light intensity compensation range to realize the compensation of the external light intensity.
  • the second compensation unit is also used to:
  • the light intensity compensation range is calculated and obtained according to the actual light intensity range of the external light and the external light intensity.
  • A' is the external light intensity
  • Z is the light intensity compensation range
  • A is the actual light intensity of the external light
  • (0.9 ⁇ 1) A is the actual light intensity range of the external light.
  • the device further includes:
  • An internal light intensity obtaining module configured to obtain the internal light intensity sensed by the camera only under the internal light
  • An actual light intensity obtaining module configured to obtain the current actual light intensity of the internal light
  • the calculation module is configured to calculate a ratio of the internal light intensity to the current actual light intensity of the internal light, and use the ratio as the screen transmittance.
  • the beneficial effects of the present invention are: acquiring the external light intensity sensed by the off-screen camera only under external light to detect whether the external light intensity can image the camera, and performing different compensations for the external light intensity according to the detection result, so that The under-screen camera has the best imaging effect under different intensity of external light.
  • FIG. 1 is a schematic flowchart of a light compensation method for a camera under an OLED screen provided by an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of a display screen in a light compensation method for a camera under an OLED screen provided by an embodiment of the present application;
  • FIG. 3 is a schematic structural diagram of an optical compensation device for a camera under an OLED screen provided by an embodiment of the present application.
  • FIG. 1 is a schematic flowchart of a light compensation method for a camera under an OLED screen provided by an embodiment of the present application.
  • the method may include the following steps:
  • the external light intensity is the intensity of the external light passing through the screen to the camera.
  • the display screen includes a base substrate 21 and a pixel unit 22.
  • the material of the base substrate 21 is mainly polyimide (Polyimide, PI).
  • the PI material can effectively improve the light transmittance .
  • a plurality of holes 23 are opened in the gap between the pixel units 22, and a camera 24 is provided below the display screen, that is, the side of the base substrate 21 away from the pixel unit 22, and the position of the sensors of the camera 24 corresponds to the positions of the plurality of holes 23 correspond.
  • the camera 24 is an under-screen camera.
  • the light that the camera 24 can receive includes external light and internal light of the screen.
  • the external light is ambient light where the screen is located, such as natural light, indoor lights, etc.
  • the internal light is light emitted by the pixel unit 22 inside the screen. Since the camera 24 is located below the screen, the external light and internal light need to pass through the screen to reach the camera 24. Therefore, the external light intensity sensed by the camera 24 is the intensity of the external light after passing through the screen, which is sensed by the camera 24
  • the internal light intensity is the light intensity after the internal light passes through the screen, and the external light intensity and the internal light intensity are weaker than the actual light intensity of the external light and the internal light, respectively.
  • the sensor of the camera 24 can also turn on the compensation light, which can directly reach the camera 24 without passing through the screen.
  • A represents the actual light intensity of external light
  • A' represents the external light intensity
  • B represents the actual light intensity of internal light
  • B' represents the internal light intensity. Since the external light and the internal light include red light R, blue light B, and green light G, the actual light intensity A of the external light and the actual light intensity B of the internal light can be expressed by the following formula:
  • X1, X2, X3, Y1, Y2, and Y3 are coefficients
  • a, b, and c are the light intensity of red light R, blue light B, and green light G, respectively.
  • the internal light and the compensation light of the camera's sensor are first turned off, so that the camera is only in the external light, and the light intensity sensed by the camera at this time is obtained.
  • the light intensity is the external light passing through the screen and reaching the outside of the camera Light intensity.
  • the external light intensity is detected to determine whether the external light intensity can image the camera.
  • a preset light intensity threshold is used to determine, the light intensity threshold can be used to image the camera Light intensity threshold.
  • step 102 includes:
  • the preset light intensity threshold is 30cd/m 2 .
  • the external light intensity is compensated differently according to different detection results, so that the camera can achieve the optimal imaging effect under different external light.
  • step 103 includes:
  • the internal light of the screen is used to compensate the external light intensity, so that the compensated light intensity can image the camera;
  • the sensor of the camera is used to compensate the external light intensity, so that the compensated light intensity is within the actual light intensity range of the external light.
  • the external light intensity cannot make the camera image, which means that the external light is weak at this time, and when the external light is weak, the compensation of the camera sensor will produce a lot of noise, so the screen is used
  • the internal light compensates the external light intensity to enable the camera to image.
  • screen internal light to compensate the external light intensity specifically includes:
  • the internal light intensity is the light intensity of the internal light passing through the screen to the camera.
  • the adjusting the internal light intensity to a preset light intensity threshold specifically includes:
  • the driving current of the pixel unit is adjusted to adjust the internal light intensity to the preset light intensity threshold.
  • the internal light is turned on through the chip IC in the display screen, and the actual light intensity of the internal light is adjusted by adjusting the drive current of the pixel unit, and then the internal light intensity is adjusted, so that the external light intensity and the internal light reaching the camera The light intensity together images the camera.
  • the adjustment of the actual light intensity of the internal light may be the adjustment of the light intensity of red light R, blue light B or green light G in the internal light alone, or the adjustment of the overall light intensity of the internal light.
  • the internal light intensity can be adjusted to a preset light intensity threshold to ensure that the camera can image.
  • the actual light intensity required for the internal light is calculated according to the preset light intensity threshold and the screen transmittance, so as to adjust the pixel unit according to the actual light intensity required for the internal light Drive current.
  • the internal light intensity is the preset light intensity threshold.
  • the external light intensity can make the camera image, which means that the external light is strong at this time.
  • the sensor of the camera can be directly used to compensate the external light intensity to make the compensation
  • the post-light intensity is within the actual light intensity range of the external light, so that the light intensity sensed by the camera is close to the actual light intensity of the external light, which is conducive to the camera's true imaging.
  • the sensor using the camera to compensate the external light intensity specifically includes:
  • the compensation light of the sensor of the camera is turned on, and the light intensity of the compensation light is adjusted to the light intensity compensation range to realize the compensation of the external light intensity.
  • the calculation of the light intensity compensation range according to the external light intensity and the screen transmittance specifically includes:
  • the light intensity compensation range is calculated and obtained according to the actual light intensity range of the external light and the external light intensity.
  • the compensation light of the sensor of the camera is turned on to adjust the light intensity of the compensation light to the light intensity compensation range, so that the external light intensity and the compensation light intensity are taken together as the light intensity received by the camera, so that the camera receives The received light intensity is close to the actual light intensity of the external light.
  • the light intensity compensation range can be calculated according to the external light intensity and the screen transmittance. Specifically, the actual light intensity of the external light intensity at this time is calculated from the external light intensity and the screen transmittance, and then the actual light intensity range of the external light is calculated according to the preset range. Finally, the light intensity compensation range can be calculated according to the actual light intensity range of the external light and the external light intensity.
  • the calculation formula is as follows:
  • A' is the external light intensity
  • Z is the light intensity compensation range
  • A is the actual light intensity of the external light
  • (0.9 ⁇ 1) A is the actual light intensity range of the external light.
  • the external light intensity when the external light intensity is detected to be 60 cd/m 2 , the camera can be imaged, but the imaging effect of the camera does not achieve the best results, so the external light intensity needs to be compensated.
  • the screen light transmittance is 50%
  • the actual light intensity A of the external light is calculated to be 120 cd/m 2
  • the required compensation light intensity is calculated to be 60 cd/m 2 .
  • the intensity is adjusted to 60 cd/m 2 so that the light intensity received by the camera is equal to the actual light intensity of the external light, which is conducive to the camera's true imaging.
  • the screen transmittance needs to be determined first. Place the screen in a dark environment, when there is no external light, turn off the compensation light of the camera sensor and turn on the internal light, so that the light intensity sensed by the camera 24 is only the internal light intensity B'.
  • the current actual light intensity of the internal light is B, that is, the light intensity emitted by the pixel unit inside the screen can be obtained by detection.
  • the ratio between the external light intensity B'and the current actual light intensity B of the internal light is the screen light transmittance B'/B.
  • the screen light transmittance may be the light transmittance of the base substrate 21.
  • the light compensation method of the under-screen camera provided by this embodiment can obtain the external light intensity sensed by the under-screen camera only under external light to detect whether the external light intensity can image the camera, and according to the detection As a result, the external light intensity is compensated differently, so that the off-screen camera has the best imaging effect under different intensity of external light.
  • FIG. 3 is a schematic structural diagram of an optical compensation device for an under-OLED screen camera provided by an embodiment of the present application, and can implement all processes of the foregoing optical compensation method for an under-OLED screen camera.
  • the device includes:
  • the external light intensity obtaining module 31 is used to obtain the external light intensity sensed by the off-screen camera only under the external light; the external light intensity is the intensity of the external light passing through the screen to the camera;
  • the detection module 32 is configured to detect whether the external light intensity can image the camera
  • the compensation module 33 is configured to compensate for the external light intensity using screen internal light or the sensor of the camera according to the detection result.
  • the detection module is specifically used for:
  • the compensation module specifically includes:
  • the first compensation unit is used to compensate the external light intensity with the internal light of the screen when the external light intensity cannot image the camera, so that the compensated light intensity can image the camera;
  • the second compensation unit is used to compensate the external light intensity by using the sensor of the camera when the external light intensity can image the camera, so that the compensated light intensity is located in the actual external light Within the range of light intensity.
  • the first compensation unit is also used to:
  • the internal light intensity is the light intensity of the internal light passing through the screen to the camera.
  • the internal light is light emitted by the pixel unit inside the screen
  • the first compensation unit is also used to:
  • the driving current of the pixel unit is adjusted to adjust the internal light intensity to the preset light intensity threshold.
  • the second compensation unit is also used to:
  • the compensation light of the sensor of the camera is turned on, and the light intensity of the compensation light is adjusted to the light intensity compensation range to realize the compensation of the external light intensity.
  • the second compensation unit is also used to:
  • the light intensity compensation range is calculated and obtained according to the actual light intensity range of the external light and the external light intensity.
  • A' is the external light intensity
  • Z is the light intensity compensation range
  • A is the actual light intensity of the external light
  • (0.9 ⁇ 1) A is the actual light intensity range of the external light.
  • the device further includes:
  • An internal light intensity obtaining module configured to obtain the internal light intensity sensed by the camera only under the internal light
  • An actual light intensity obtaining module configured to obtain the current actual light intensity of the internal light
  • the calculation module is configured to calculate a ratio of the internal light intensity to the current actual light intensity of the internal light, and use the ratio as the screen transmittance.
  • the light compensation device of the under-screen camera provided by this embodiment can obtain the external light intensity sensed by the under-screen camera only under external light to detect whether the external light intensity can image the camera, and according to the detection As a result, the external light intensity is compensated differently, so that the off-screen camera has the best imaging effect under different intensity of external light.

Abstract

一种OLED屏下摄像头(24)的光补偿方法及装置，OLED屏下摄像头(24)的光补偿方法包括：获取屏下摄像头(24)仅在外部光下感测到的外部光强；外部光强为外部光穿过屏幕到达摄像头(24)的光强(101)；检测外部光强是否能使摄像头(24)成像(102)，并根据检测结果采用屏幕内部光或摄像头(24)的传感器对外部光强进行补偿(103)。

Description

一种OLED屏下摄像头的光补偿方法及装置 技术领域
本发明涉及显示面板技术领域，尤其涉及一种OLED屏下摄像头的光补偿方法及装置。
 背景技术
OLED显示技术与传统的LCD显示方式不同，无需背光灯，采用非常薄的有机材料涂层和玻璃基板，当有电流通过时，这些有机材料就会发光。而且OLED显示屏幕可以做得更轻更薄，OLED技术发展可视角度更大，并且能够显著节省电能。
在当今全面屏的风潮之下，虽然各手机厂商提出了各式各样的解决方案，但正面开孔始终是无法解决的难题。于是，刘海屏、水滴屏、升降摄像头等设计方案才层出不穷，但是为了实现真正的全面屏，当下手机厂商都在积极研发屏下摄像头技术，即将前置摄像头安放在屏幕下方，但是透明度、分辨率等存在一定的问题。虽然柔性OLED屏的衬底本身就是一个“透明的塑料”，但是如果把摄像头放到OLED屏下，并且能够得到很好的成像，那么屏幕的透光率至少也需要80%以上，但目前的技术只能做到40%左右，使得屏下摄像头接收到的光强较弱，不利于成像。
 技术问题
本申请实施例提供一种OLED屏下摄像头的光补偿方法及装置，以解决现有屏下摄像头接收到的光强较弱，不利于成像的问题。
 技术解决方案
本申请实施例提供了一种OLED屏下摄像头的光补偿方法，包括：
获取屏下摄像头仅在外部光下感测到的外部光强；所述外部光强为所述外部光穿过屏幕到达所述摄像头的光强；
检测所述外部光强是否能使所述摄像头成像，并根据检测结果采用屏幕内部光或所述摄像头的传感器对所述外部光强进行补偿。
进一步地，所述检测所述外部光强是否能使所述摄像头成像，具体包括：
检测所述外部光强是否超过预设光强阈值；
若否，则判定检测结果为所述外部光强不能使所述摄像头成像；
若是，则判定检测结果为所述外部光强能使所述摄像头成像。
进一步地，所述根据检测结果采用屏幕内部光或所述摄像头的传感器对所述外部光强进行补偿，具体包括：
在所述外部光强不能使所述摄像头成像时，采用屏幕内部光对所述外部光强进行补偿，以使补偿后的光强能使所述摄像头成像；
在所述外部光强能使所述摄像头成像时，采用所述摄像头的传感器对所述外部光强进行补偿，以使补偿后的光强位于所述外部光的实际光强范围内。
进一步地，所述采用屏幕内部光对所述外部光强进行补偿，具体包括：
开启所述内部光，并将内部光强调整到预设光强阈值，实现对所述外部光强的补偿；所述内部光强为所述内部光穿过屏幕到达所述摄像头的光强。
进一步地，所述内部光为屏幕内部的像素单元发出的光；
所述将内部光强调整到预设光强阈值，具体包括：
根据预设光强阈值和屏幕透光率，计算获得所述内部光所需的实际光强；
根据所述内部光所需的实际光强，调节所述像素单元的驱动电流，以将所述内部光强调整到所述预设光强阈值。
进一步地，所述采用所述摄像头的传感器对所述外部光强进行补偿，具体包括：
根据所述外部光强和屏幕透光率，计算获得光强补偿范围；
开启所述摄像头的传感器的补偿光，并将所述补偿光的光强调整到所述光强补偿范围中，实现对所述外部光强的补偿。
进一步地，所述根据所述外部光强和屏幕透光率，计算获得光强补偿范围，具体包括：
根据所述外部光强和屏幕透光率，计算获得所述外部光的实际光强，进而获得所述外部光的实际光强范围；
根据所述外部光的实际光强范围和所述外部光强，计算获得所述光强补偿范围。
进一步地，所述光强补偿范围的计算公式为：
A’+Z=(0.9~1)A；
其中，A’为所述外部光强，Z为所述光强补偿范围，A为所述外部光的实际光强，(0.9~1)A为所述外部光的实际光强范围。
进一步地，在所述获取屏下摄像头仅在外部光下感测到的外部光强之前，还包括：
获取所述摄像头仅在内部光下感测到的内部光强；
获取所述内部光当前的实际光强；
计算所述内部光强与所述内部光当前的实际光强的比值，并将所述比值作为所述屏幕透光率。
本申请实施例提供了一种OLED屏下摄像头的光补偿装置，所述装置包括：
外部光强获取模块，用于获取屏下摄像头仅在外部光下感测到的外部光强；所述外部光强为所述外部光穿过屏幕到达所述摄像头的光强；
检测模块，用于检测所述外部光强是否能使所述摄像头成像；
补偿模块，用于根据检测结果采用屏幕内部光或所述摄像头的传感器对所述外部光强进行补偿。
进一步地，所述检测模块具体用于：
检测所述外部光强是否超过预设光强阈值；
若否，则判定检测结果为所述外部光强不能使所述摄像头成像；
若是，则判定检测结果为所述外部光强能使所述摄像头成像。
进一步地，所述补偿模块具体包括：
第一补偿单元，用于在所述外部光强不能使所述摄像头成像时，采用屏幕内部光对所述外部光强进行补偿，以使补偿后的光强能使所述摄像头成像；
第二补偿单元，用于在所述外部光强能使所述摄像头成像时，采用所述摄像头的传感器对所述外部光强进行补偿，以使补偿后的光强位于所述外部光的实际光强范围内。
进一步地，所述第一补偿单元还用于：
开启所述内部光，并将内部光强调整到预设光强阈值，实现对所述外部光强的补偿；所述内部光强为所述内部光穿过屏幕到达所述摄像头的光强。
进一步地，所述内部光为屏幕内部的像素单元发出的光；
所述第一补偿单元还用于：
根据预设光强阈值和屏幕透光率，计算获得所述内部光所需的实际光强；
根据所述内部光所需的实际光强，调节所述像素单元的驱动电流，以将所述内部光强调整到所述预设光强阈值。
进一步地，所述第二补偿单元还用于：
根据所述外部光强和屏幕透光率，计算获得光强补偿范围；
开启所述摄像头的传感器的补偿光，并将所述补偿光的光强调整到所述光强补偿范围中，实现对所述外部光强的补偿。
进一步地，所述第二补偿单元还用于：
根据所述外部光强和屏幕透光率，计算获得所述外部光的实际光强，进而获得所述外部光的实际光强范围；
根据所述外部光的实际光强范围和所述外部光强，计算获得所述光强补偿范围。
进一步地，所述光强补偿范围的计算公式为：
A’+Z=(0.9~1)A；
其中，A’为所述外部光强，Z为所述光强补偿范围，A为所述外部光的实际光强，(0.9~1)A为所述外部光的实际光强范围。
进一步地，所述装置还包括：
内部光强获取模块，用于获取所述摄像头仅在内部光下感测到的内部光强；
实际光强获取模块，用于获取所述内部光当前的实际光强；
计算模块，用于计算所述内部光强与所述内部光当前的实际光强的比值，并将所述比值作为所述屏幕透光率。
 有益效果
本发明的有益效果为：获取屏下摄像头仅在外部光下感测到的外部光强，以检测外部光强是否能使摄像头成像，并根据检测结果对外部光强进行不同的补偿，从而使屏下摄像头在不同强度的外部光下具有最佳成像效果。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的OLED屏下摄像头的光补偿方法的流程示意图；
图2为本申请实施例提供的OLED屏下摄像头的光补偿方法中显示屏的结构示意图；
图3为本申请实施例提供的OLED屏下摄像头的光补偿装置的结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
如图1所示，图1是本申请实施例提供的OLED屏下摄像头的光补偿方法的流程示意图，该方法可以包括如下步骤：
101、获取屏下摄像头仅在外部光下感测到的外部光强；所述外部光强为所述外部光穿过屏幕到达所述摄像头的光强。
本实施例中，如图2所示，显示屏包括衬底基板21和像素单元22，衬底基板21的材料主要为聚酰亚胺（Polyimide, PI），PI材料可以有效地提高透光度。像素单元22之间的间隙中开设有多个孔23，显示屏的下方，即衬底基板21远离像素单元22的一侧设置有摄像头24，且摄像头24的传感器与多个孔23的位置相对应。其中，摄像头24即为屏下摄像头。
摄像头24可接收到的光包括屏幕的外部光和内部光。其中，外部光即为屏幕所处的环境光，例如自然光、室内灯光等等，内部光即为屏幕内部的像素单元22发出的光。由于摄像头24设于屏幕的下方，外部光和内部光需穿过屏幕才能到达摄像头24，因此摄像头24感测到的外部光强为外部光穿过屏幕后的光强，摄像头24感测到的内部光强为内部光穿过屏幕后的光强，外部光强和内部光强分别弱于外部光和内部光的实际光强。另外，摄像头24的传感器还可开启补偿光，该补偿光无需穿过屏幕直接到达摄像头24。
如图2所示，A代表外部光的实际光强，A’代表外部光强，B代表内部光的实际光强，B’代表内部光强。由于外部光和内部光均包括红光R、蓝光B和绿光G，因此外部光的实际光强A和内部光的实际光强B可由如下公式进行表示：
A=X1*a+X2*b+X3*c；
B=Y1*a+Y2*b+Y3*c。
其中，X1、X2、X3、Y1、Y2和Y3为系数，a、b、c分别为红光R、蓝光B和绿光G的光强。
本实施例中，先关闭内部光和摄像头的传感器的补偿光，使摄像头仅处于外部光中，获取摄像头此时感测到的光强，该光强即为外部光穿过屏幕到达摄像头的外部光强。
102、检测所述外部光强是否能使所述摄像头成像。
本实施例中，在获取外部光强后，对外部光强进行检测，判断外部光强是否能使摄像头成像，一般通过预设光强阈值来进行判断，该光强阈值可以为能使摄像头成像的光强阈值。
具体地，步骤102包括：
检测所述外部光强是否超过预设光强阈值；
若否，则判定检测结果为所述外部光强不能使所述摄像头成像；
若是，则判定检测结果为所述外部光强能使所述摄像头成像。
需要说明的是，若外部光强未超过预设光强阈值，则判定当前外部光较弱，外部光强不能使摄像头成像；若外部光强超过预设光强阈值，则判定当前外部光较强，外部光强能使摄像头成像。在一个具体的实施方式中，预设光强阈值为30cd/m 2。
103、根据检测结果采用屏幕内部光或所述摄像头的传感器对所述外部光强进行补偿。
本实施例中，根据不同的检测结果，对外部光强进行不同的补偿，以使摄像头在不同的外部光下达到最优成像效果。
具体地，步骤103包括：
在所述外部光强不能使所述摄像头成像时，采用屏幕内部光对所述外部光强进行补偿，以使补偿后的光强能使所述摄像头成像；
在所述外部光强能使所述摄像头成像时，采用所述摄像头的传感器对所述外部光强进行补偿，以使补偿后的光强位于所述外部光的实际光强范围内。
在一个具体的实施方式中，外部光强不能使摄像头成像，则说明此时外部光较弱，而外部光较弱的情况下，采用摄像头的传感器进行补偿会产生很大的噪点，因此采用屏幕内部光对外部光强进行补偿，以使摄像头能够成像。
进一步地，所述采用屏幕内部光对所述外部光强进行补偿，具体包括：
开启所述内部光，并将内部光强调整到预设光强阈值，实现对所述外部光强的补偿；所述内部光强为所述内部光穿过屏幕到达所述摄像头的光强。
进一步地，所述将内部光强调整到预设光强阈值，具体包括：
根据预设光强阈值和屏幕透光率，计算获得所述内部光所需的实际光强；
根据所述内部光所需的实际光强，调节所述像素单元的驱动电流，以将所述内部光强调整到所述预设光强阈值。
需要说明的是，通过显示屏中的芯片IC来开启内部光，并通过调整像素单元的驱动电流来调整内部光的实际光强，进而调整内部光强，从而使到达摄像头的外部光强和内部光强一起使摄像头成像。其中，内部光的实际光强的调整可以是单独对内部光中的红光R、蓝光B或绿光G的光强进行调整，也可以是对内部光的整体光强进行调整。
内部光强可以调整到预设光强阈值，以确保摄像头能够成像。为了使内部光强调整到预设光强阈值，则根据预设光强阈值和屏幕透光率来计算内部光所需的实际光强，以便根据内部光所需的实际光强来调整像素单元的驱动电流。在内部光的实际光强调整到其所需的实际光强时，内部光强即为预设光强阈值。
例如，在检测到外部光强A’为20cd/m 2时，不能使摄像头24成像，此时采用内部光对外部光强进行补偿。若屏幕透光率为50%，而所需补偿的内部光强为30cd/m 2，则计算出内部光所需的实际光强为60cd/m 2。调整像素单元的驱动电流，使内部光的实际光强达到60cd/m 2，从而使内部光强达到30cd/m 2，补偿后的光强即为A’+B’=20+30=50 cd/m 2，此时能够使摄像头24成像。
在另一个具体的实施方式中，外部光强能使摄像头成像，则说明此时外部光较强，在外部光较强的情况下，可直接采用摄像头的传感器对外部光强进行补偿，使补偿后的光强位于外部光的实际光强范围内，从而使摄像头感测到的光强接近于外部光的实际光强，有利于摄像头真实地成像。
进一步地，所述采用所述摄像头的传感器对所述外部光强进行补偿，具体包括：
根据所述外部光强和屏幕透光率，计算获得光强补偿范围；
开启所述摄像头的传感器的补偿光，并将所述补偿光的光强调整到所述光强补偿范围中，实现对所述外部光强的补偿。
进一步地，所述根据所述外部光强和屏幕透光率，计算获得光强补偿范围，具体包括：
根据所述外部光强和屏幕透光率，计算获得所述外部光的实际光强，进而获得所述外部光的实际光强范围；
根据所述外部光的实际光强范围和所述外部光强，计算获得所述光强补偿范围。
需要说明的是，开启摄像头的传感器的补偿光，以将补偿光的光强调整到光强补偿范围内，从而将外部光强和补偿光的光强一起作为摄像头接收的光强，使摄像头接收到的光强接近于外部光的实际光强。
其中，光强补偿范围可根据外部光强和屏幕透光率来进行计算。具体地，通过外部光强和屏幕透光率计算此时外部光强的实际光强，进而根据预设的范围计算外部光的实际光强范围。最后，根据外部光的实际光强范围和外部光强即可计算光强补偿范围，其计算公式如下：
A’+Z=(0.9~1)A；
其中，A’为所述外部光强，Z为所述光强补偿范围，A为所述外部光的实际光强，(0.9~1)A为所述外部光的实际光强范围。
例如，在检测到外部光强为60 cd/m 2，能够使摄像头成像，但摄像头的成像效果没有达到最佳效果，因此还需对外部光强进行补偿。若屏幕透光率为50%，计算出外部光的实际光强A为120 cd/m 2，进而计算出所需补偿的光强为60 cd/m 2，通过将摄像头传感器的补偿光的光强调整为60 cd/m 2，使摄像头接收到的光强等于外部光的实际光强，有利于摄像头真实地成像。
进一步地，在所述获取屏下摄像头仅在外部光下感测到的外部光强之前，还包括：
获取所述摄像头仅在内部光下感测到的内部光强；
获取所述内部光当前的实际光强；
计算所述内部光强与所述内部光当前的实际光强的比值，并将所述比值作为所述屏幕透光率。
需要说明的是，在对外部光强进行补偿前，需先确定屏幕透光率。将屏幕放置于黑暗的环境中，此时不存在外部光，关闭摄像头传感器的补偿光并开启内部光，使摄像头24感测到的光强仅为内部光强B’。而内部光当前的实际光强为B，即屏幕内部像素单元发出的光强可通过检测获得。外部光强B’与内部光当前的实际光强B之间的比值即为屏幕透光率B’/B，如图2所示，屏幕透光率可以为衬底基板21的透光率。
由上述可知，本实施例提供的OLED屏下摄像头的光补偿方法，能够获取屏下摄像头仅在外部光下感测到的外部光强，以检测外部光强是否能使摄像头成像，并根据检测结果对外部光强进行不同的补偿，从而使屏下摄像头在不同强度的外部光下具有最佳成像效果。
如图3所示，图3是本申请实施例提供的OLED屏下摄像头的光补偿装置的结构示意图，能够实现上述OLED屏下摄像头的光补偿方法的所有流程。其中，所述装置包括：
外部光强获取模块31，用于获取屏下摄像头仅在外部光下感测到的外部光强；所述外部光强为所述外部光穿过屏幕到达所述摄像头的光强；
检测模块32，用于检测所述外部光强是否能使所述摄像头成像；
补偿模块33，用于根据检测结果采用屏幕内部光或所述摄像头的传感器对所述外部光强进行补偿。
进一步地，所述检测模块具体用于：
检测所述外部光强是否超过预设光强阈值；
若否，则判定检测结果为所述外部光强不能使所述摄像头成像；
若是，则判定检测结果为所述外部光强能使所述摄像头成像。
进一步地，所述补偿模块具体包括：
第一补偿单元，用于在所述外部光强不能使所述摄像头成像时，采用屏幕内部光对所述外部光强进行补偿，以使补偿后的光强能使所述摄像头成像；
第二补偿单元，用于在所述外部光强能使所述摄像头成像时，采用所述摄像头的传感器对所述外部光强进行补偿，以使补偿后的光强位于所述外部光的实际光强范围内。
进一步地，所述第一补偿单元还用于：
开启所述内部光，并将内部光强调整到预设光强阈值，实现对所述外部光强的补偿；所述内部光强为所述内部光穿过屏幕到达所述摄像头的光强。
进一步地，所述内部光为屏幕内部的像素单元发出的光；
所述第一补偿单元还用于：
根据预设光强阈值和屏幕透光率，计算获得所述内部光所需的实际光强；
根据所述内部光所需的实际光强，调节所述像素单元的驱动电流，以将所述内部光强调整到所述预设光强阈值。
进一步地，所述第二补偿单元还用于：
根据所述外部光强和屏幕透光率，计算获得光强补偿范围；
开启所述摄像头的传感器的补偿光，并将所述补偿光的光强调整到所述光强补偿范围中，实现对所述外部光强的补偿。
进一步地，所述第二补偿单元还用于：
根据所述外部光强和屏幕透光率，计算获得所述外部光的实际光强，进而获得所述外部光的实际光强范围；
根据所述外部光的实际光强范围和所述外部光强，计算获得所述光强补偿范围。
进一步地，所述光强补偿范围的计算公式为：
A’+Z=(0.9~1)A；
其中，A’为所述外部光强，Z为所述光强补偿范围，A为所述外部光的实际光强，(0.9~1)A为所述外部光的实际光强范围。
进一步地，所述装置还包括：
内部光强获取模块，用于获取所述摄像头仅在内部光下感测到的内部光强；
实际光强获取模块，用于获取所述内部光当前的实际光强；
计算模块，用于计算所述内部光强与所述内部光当前的实际光强的比值，并将所述比值作为所述屏幕透光率。
由上述可知，本实施例提供的OLED屏下摄像头的光补偿装置，能够获取屏下摄像头仅在外部光下感测到的外部光强，以检测外部光强是否能使摄像头成像，并根据检测结果对外部光强进行不同的补偿，从而使屏下摄像头在不同强度的外部光下具有最佳成像效果。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (18)

  1. 一种OLED屏下摄像头的光补偿方法，其中，包括：
    获取屏下摄像头仅在外部光下感测到的外部光强；所述外部光强为所述外部光穿过屏幕到达所述摄像头的光强；
    检测所述外部光强是否能使所述摄像头成像，并根据检测结果采用屏幕内部光或所述摄像头的传感器对所述外部光强进行补偿。
  2. 如权利要求1所述的OLED屏下摄像头的光补偿方法，其中，所述检测所述外部光强是否能使所述摄像头成像，具体包括：
    检测所述外部光强是否超过预设光强阈值；
    若否，则判定检测结果为所述外部光强不能使所述摄像头成像；
    若是，则判定检测结果为所述外部光强能使所述摄像头成像。
  3. 如权利要求1所述的OLED屏下摄像头的光补偿方法，其中，所述根据检测结果采用屏幕内部光或所述摄像头的传感器对所述外部光强进行补偿，具体包括：
    在所述外部光强不能使所述摄像头成像时，采用屏幕内部光对所述外部光强进行补偿，以使补偿后的光强能使所述摄像头成像；
    在所述外部光强能使所述摄像头成像时，采用所述摄像头的传感器对所述外部光强进行补偿，以使补偿后的光强位于所述外部光的实际光强范围内。
  4. 如权利要求3所述的OLED屏下摄像头的光补偿方法，其中，所述采用屏幕内部光对所述外部光强进行补偿，具体包括：
    开启所述内部光，并将内部光强调整到预设光强阈值，实现对所述外部光强的补偿；所述内部光强为所述内部光穿过屏幕到达所述摄像头的光强。
  5. 如权利要求4所述的OLED屏下摄像头的光补偿方法，其中，所述内部光为屏幕内部的像素单元发出的光；
    所述将内部光强调整到预设光强阈值，具体包括：
    根据预设光强阈值和屏幕透光率，计算获得所述内部光所需的实际光强；
    根据所述内部光所需的实际光强，调节所述像素单元的驱动电流，以将所述内部光强调整到所述预设光强阈值。
  6. 如权利要求3所述的OLED屏下摄像头的光补偿方法，其中，所述采用所述摄像头的传感器对所述外部光强进行补偿，具体包括：
    根据所述外部光强和屏幕透光率，计算获得光强补偿范围；
    开启所述摄像头的传感器的补偿光，并将所述补偿光的光强调整到所述光强补偿范围中，实现对所述外部光强的补偿。
  7. 如权利要求6所述的OLED屏下摄像头的光补偿方法，其中，所述根据所述外部光强和屏幕透光率，计算获得光强补偿范围，具体包括：
    根据所述外部光强和屏幕透光率，计算获得所述外部光的实际光强，进而获得所述外部光的实际光强范围；
    根据所述外部光的实际光强范围和所述外部光强，计算获得所述光强补偿范围。
  8. 如权利要求7所述的OLED屏下摄像头的光补偿方法，其中，所述光强补偿范围的计算公式为：
    A’+Z=(0.9~1)A；
    其中，A’为所述外部光强，Z为所述光强补偿范围，A为所述外部光的实际光强，(0.9~1)A为所述外部光的实际光强范围。
  9. 如权利要求5所述的OLED屏下摄像头的光补偿方法，其中，在所述获取屏下摄像头仅在外部光下感测到的外部光强之前，还包括：
    获取所述摄像头仅在内部光下感测到的内部光强；
    获取所述内部光当前的实际光强；
    计算所述内部光强与所述内部光当前的实际光强的比值，并将所述比值作为所述屏幕透光率。
  10. 一种OLED屏下摄像头的光补偿装置，其中，所述装置包括：
    外部光强获取模块，用于获取屏下摄像头仅在外部光下感测到的外部光强；所述外部光强为所述外部光穿过屏幕到达所述摄像头的光强；
    检测模块，用于检测所述外部光强是否能使所述摄像头成像；
    补偿模块，用于根据检测结果采用屏幕内部光或所述摄像头的传感器对所述外部光强进行补偿。
  11. 如权利要求10所述的OLED屏下摄像头的光补偿装置，其中，所述检测模块具体用于：
    检测所述外部光强是否超过预设光强阈值；
    若否，则判定检测结果为所述外部光强不能使所述摄像头成像；
    若是，则判定检测结果为所述外部光强能使所述摄像头成像。
  12. 如权利要求10所述的OLED屏下摄像头的光补偿装置，其中，所述补偿模块具体包括：
    第一补偿单元，用于在所述外部光强不能使所述摄像头成像时，采用屏幕内部光对所述外部光强进行补偿，以使补偿后的光强能使所述摄像头成像；
    第二补偿单元，用于在所述外部光强能使所述摄像头成像时，采用所述摄像头的传感器对所述外部光强进行补偿，以使补偿后的光强位于所述外部光的实际光强范围内。
  13. 如权利要求12所述的OLED屏下摄像头的光补偿装置，其中，所述第一补偿单元还用于：
    开启所述内部光，并将内部光强调整到预设光强阈值，实现对所述外部光强的补偿；所述内部光强为所述内部光穿过屏幕到达所述摄像头的光强。
  14. 如权利要求13所述的OLED屏下摄像头的光补偿装置，其中，所述内部光为屏幕内部的像素单元发出的光；
    所述第一补偿单元还用于：
    根据预设光强阈值和屏幕透光率，计算获得所述内部光所需的实际光强；
    根据所述内部光所需的实际光强，调节所述像素单元的驱动电流，以将所述内部光强调整到所述预设光强阈值。
  15. 如权利要求12所述的OLED屏下摄像头的光补偿装置，其中，所述第二补偿单元还用于：
    根据所述外部光强和屏幕透光率，计算获得光强补偿范围；
    开启所述摄像头的传感器的补偿光，并将所述补偿光的光强调整到所述光强补偿范围中，实现对所述外部光强的补偿。
  16. 如权利要求15所述的OLED屏下摄像头的光补偿装置，其中，所述第二补偿单元还用于：
    根据所述外部光强和屏幕透光率，计算获得所述外部光的实际光强，进而获得所述外部光的实际光强范围；
    根据所述外部光的实际光强范围和所述外部光强，计算获得所述光强补偿范围。
  17. 如权利要求16所述的OLED屏下摄像头的光补偿装置，其中，所述光强补偿范围的计算公式为：
    A’+Z=(0.9~1)A；
    其中，A’为所述外部光强，Z为所述光强补偿范围，A为所述外部光的实际光强，(0.9~1)A为所述外部光的实际光强范围。
  18. 如权利要求14所述的OLED屏下摄像头的光补偿装置，其中，所述装置还包括：
    内部光强获取模块，用于获取所述摄像头仅在内部光下感测到的内部光强；
    实际光强获取模块，用于获取所述内部光当前的实际光强；
    计算模块，用于计算所述内部光强与所述内部光当前的实际光强的比值，并将所述比值作为所述屏幕透光率。
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