WO2016150112A1 - Procédé et appareil permettant d'ajuster la luminosité d'un écran d'affichage - Google Patents

Procédé et appareil permettant d'ajuster la luminosité d'un écran d'affichage Download PDF

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Publication number
WO2016150112A1
WO2016150112A1 PCT/CN2015/089359 CN2015089359W WO2016150112A1 WO 2016150112 A1 WO2016150112 A1 WO 2016150112A1 CN 2015089359 W CN2015089359 W CN 2015089359W WO 2016150112 A1 WO2016150112 A1 WO 2016150112A1
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WO
WIPO (PCT)
Prior art keywords
display screen
brightness
value
backlight
angle
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PCT/CN2015/089359
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English (en)
Chinese (zh)
Inventor
张晓亮
冯磊
孙卫山
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中兴通讯股份有限公司
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Publication of WO2016150112A1 publication Critical patent/WO2016150112A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • 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

  • This application relates to, but is not limited to, the field of display technology.
  • FIG. 1 is a schematic diagram showing the brightness of the LCD observed at different viewing positions of the display screen. As shown in Figure 1, the abscissa indicates the angle between the user's viewing position on the display surface and the vertical direction of the display screen, and the ordinate indicates that it is observed. LCD brightness value. It can be seen from Fig.
  • the angle between the user's viewing position and the vertical direction of the display screen changes obliquely from 0 degrees to 90 degrees (ie, the user's viewing position is inclined from perpendicular to the display screen surface to be parallel to the display screen surface).
  • the brightness of the observed LCD display is constantly decreasing. Therefore, under the sun (or strong external ambient light), the user often feels that the display screen is not clear, because the brightness of the observed LCD display is low, and the brightness of the reflected light of the ambient light is enhanced.
  • the same OLED screen also has such defects.
  • the related smart mobile terminal products are all equipped with light sensing devices, which can understand the brightness of the ambient light at any time, thereby adjusting the display.
  • the brightness of the screen For example, the smart mobile terminal stores the correspondence between the ambient light brightness and the brightness of the display screen.
  • the brightness of the display screen increases as the brightness of the ambient light decreases, and the brightness of the corresponding display screen is determined according to the monitored ambient light brightness. Adjust the brightness of the display.
  • the ambient light brightness can also be judged by using a camera. This method is often used in an environment where photographing is performed.
  • the ambient light brightness is judged by the image of the framing, thereby adjusting the brightness of the imaged image.
  • the front camera of the smart mobile terminal can also determine the brightness of the ambient light for adjusting the brightness of the display screen.
  • the display brightness adjustment method of the related art only adjusts the brightness of the display screen according to the ambient light brightness, and cannot solve the problem that the user observes the position when the user views the display screen under strong ambient light conditions. At the same time, the observed brightness of the display screen is lowered, which causes the user to have a poor effect on viewing the display screen, thereby affecting the user experience.
  • the present invention provides a method and device for adjusting the brightness of a display screen, which can adjust the brightness of the display screen according to the ambient light brightness in time, thereby improving the viewing effect of the display screen, thereby improving the user experience.
  • a method for adjusting brightness of a display screen comprising: obtaining a reference backlight data of a display screen according to a current ambient light brightness value when the ambient light brightness value of the display screen exceeds a set value; acquiring an image facing the display screen And determining location data of the information, and determining compensation backlight data of the display screen according to the location data; adjusting backlight brightness of the display screen according to the reference backlight data and the compensation backlight data.
  • the method further includes: presetting a correspondence between the ambient light brightness value and the display screen brightness value;
  • the obtaining the reference backlight data of the display screen according to the current ambient light brightness value comprises:
  • the display screen brightness value corresponding to the current ambient light brightness value is searched according to the preset correspondence relationship, and the found display screen brightness value is used as the reference backlight data of the display screen.
  • determining the compensated backlight data of the display screen according to the location data includes:
  • the degree compensation value is used as the compensation backlight data of the display screen.
  • the relationship between the included angle and the brightness compensation value of the display screen is:
  • the display brightness compensation value is set to 0; and / or,
  • the display brightness compensation value is set to 50% of the reference brightness value; and / or,
  • the display brightness compensation value is set to 30% of the reference brightness value; and / or,
  • the display brightness compensation value is set to 20% of the reference brightness value
  • the reference brightness value is a display screen brightness value determined according to a current ambient light brightness value.
  • the method before the acquiring location data of the identification information in the image collected by the display screen, the method further includes: collecting the surface by using one of three pixels of red, green, and blue by using an interlaced scanning method. An image of the display.
  • a device for adjusting brightness of a display screen comprising: a reference backlight processing module, configured to: when the ambient light brightness value of the display screen exceeds a set value, obtain a reference backlight data of the display screen according to the current ambient light brightness value;
  • the processing module is configured to: obtain position data facing the identification information in the image collected by the display screen, and determine compensation backlight data of the display screen according to the position data; and
  • the backlight adjustment module is configured to: according to the reference backlight data and The compensated backlight data adjusts the backlight brightness of the display screen.
  • a correspondence between the ambient light brightness value and the display screen brightness value is pre-stored in the reference backlight processing module
  • the reference backlight processing module is configured to:
  • the display screen brightness value corresponding to the current ambient light brightness value is searched according to the preset correspondence relationship, and the found display screen brightness value is used as the reference backlight data of the display screen.
  • the identification processing module is configured to:
  • the display brightness compensation value is used as compensation backlight data for the display.
  • the relationship between the included angle and the brightness compensation value of the display screen is:
  • the display brightness compensation value is set to 0; and / or,
  • the display brightness compensation value is set to 50% of the reference brightness value; and / or,
  • the display brightness compensation value is set to 30% of the reference brightness value; and / or,
  • the display brightness compensation value is set to 20% of the reference brightness value
  • the reference brightness value is a display screen brightness value determined according to a current ambient light brightness value.
  • the device further includes an image acquisition module, configured to: collect the image facing the display screen by using one of red, green, and blue pixels by using an interlaced scanning method.
  • an image acquisition module configured to: collect the image facing the display screen by using one of red, green, and blue pixels by using an interlaced scanning method.
  • a computer readable storage medium storing computer executable instructions for performing the method of any of the above.
  • the embodiment of the present invention determines the reference backlight data of the display screen by using the ambient light brightness value, and determines the compensation backlight data of the display screen by identifying the position data of the identification information (such as the human eye or the human face) in the image collected by the display screen, according to
  • the reference backlight data and the compensated backlight data enable intelligent adjustment of the display brightness.
  • the embodiment of the present invention compensates for the problem that the brightness of the display screen is lowered due to the difference in the viewing position of the display screen by the user by recognizing the position data of the identification information, and realizing the light according to the ambient light. Brightness adjusts the brightness of the display in time, thus ensuring that the user can clearly see the content displayed on the display under the condition of strong external ambient light, thereby improving the effect and experience of the user viewing the display.
  • FIG. 1 is a schematic diagram showing the brightness of an LCD observed in different viewing positions of the display screen in the related art
  • FIG. 2 is a flowchart of a method for adjusting brightness of a display screen according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of an apparatus for adjusting brightness of a display screen according to an embodiment of the present invention
  • FIG. 4 is a diagram showing an angular distribution of a camera according to an embodiment of the present invention.
  • the method for adjusting the brightness of a display screen includes:
  • Step 11 When the ambient light brightness value of the display screen exceeds the set value, the reference backlight data of the display screen is obtained according to the current ambient light brightness value.
  • the setting value in this step is a preset value of the ambient light brightness, which can be preset by the smart mobile terminal manufacturer.
  • the ambient light brightness value of the display screen exceeds the set value, it indicates that the display screen is in a strong ambient light condition, and the current ambient light brightness has an influence on the user identification display screen information. How to adjust the brightness of the display.
  • the method further includes: presetting the correspondence between the ambient light brightness value and the display brightness value; and obtaining the reference backlight data of the display screen according to the current ambient light brightness value in the step includes:
  • the display screen brightness value corresponding to the current ambient light brightness value is searched according to the preset correspondence relationship, and the found display screen brightness value is used as the reference backlight data of the display screen.
  • the backlight current value required to obtain the brightness value of the display screen may be: the brightness value of the display screen is converted into the backlight current value required to obtain the brightness value of the display screen according to the number of backlights of the display screen.
  • Step 12 Acquire an image facing the display.
  • the image facing the display screen collected in this step includes: using an interlaced scanning method, capturing an image facing the display screen by one of three pixels of red, green and blue.
  • the reference backlight data of the display screen and the image of the display facing the display according to the current ambient light brightness value in steps 11 and 12 are not strictly time-ordered, as long as the display screen is located.
  • step 12 may be performed first, and then step 11 is performed, that is, the image facing the display screen is collected first, and then the ambient light brightness value of the display screen is obtained, and whether the current ambient light brightness value exceeds the setting is determined.
  • the value when the ambient light brightness value exceeds the set value, obtains the reference backlight data of the display screen according to the current ambient light brightness value.
  • Step 13 Acquire location data of the identification information in the collected image, and determine compensation backlight data of the display screen according to the location data.
  • the identification information as an example of a human eye or a human face
  • determining the compensation backlight data of the display screen according to the position data of the human eye or the human face includes:
  • the angle between the human eye or the face and the vertical direction of the display screen is obtained, and according to the corresponding relationship between the preset angle and the brightness compensation value of the display screen, the brightness of the display screen corresponding to the obtained angle is determined.
  • the compensation value is used to calculate a backlight current value required to obtain the brightness compensation value of the display screen, and the backlight current value is used as compensation backlight data of the display screen;
  • the angle between the human eye or the face and the vertical direction of the display screen is obtained, and according to the corresponding relationship between the preset angle and the brightness compensation value of the display screen, the brightness of the display screen corresponding to the obtained angle is determined.
  • the compensation value is used as the compensation backlight data of the display screen.
  • the position data is, for example, the distance from the imaging position of the human eye or the human face to the origin of the coordinate in the XY coordinate system in which the center of the image controller of the camera is the coordinate origin.
  • the incident ray 21 enters the image controller CCD 23 of the camera through the camera lens 22.
  • the human eye or face is imaged on the CCD 23 of the camera, and the XY coordinate system is established with the center of the CCD 23 as the coordinate origin, with a certain distance as the radius (where the distance is obtained according to the actual camera measurement data), and the measurement is perpendicular to
  • the camera lens spreads out at an angle of 0-10 degrees that is, when the angle between the human eye or the face and the vertical direction of the display screen is not less than 0 degrees and not more than 10 degrees
  • the distance of the imaging position on the CCD 23 from the origin of the coordinate is obtained.
  • the sequential measurement obtains an angle of 10-25 degrees perpendicular to the camera lens (ie, the angle between the human eye or the face perpendicular to the display screen is greater than 10 degrees and not greater than 25 degrees), and the angle of 25-40 degrees ( That is, the angle between the human eye or the face and the vertical direction of the display screen is greater than 25 degrees and not more than 40 degrees), and the angle of 40-60 degrees (ie, the angle between the human eye or the face and the vertical direction of the display screen is greater than 40 degrees and When it is not more than 60 degrees, the distance of the imaging position on the CCD 23 from the origin of the coordinate is finally obtained, and finally a plurality of regions 24, 25, 26, 27 as shown in Fig. 4 are obtained. According to this, the angle between the human eye or the face and the vertical direction of the display screen can be determined according to the position data of the human eye or the human face.
  • the brightness compensation value obtained by the display screen is also different.
  • the relationship between the angle of the angle and the brightness compensation value of the display screen is: when the angle is not less than 0 degrees and not more than 10 degrees, the brightness compensation value of the display screen is set to 0; and/or, when the angle is greater than 10 degrees and When the angle is not more than 25 degrees, the display brightness compensation value is set to 50% of the reference brightness value; and/or, when the angle is greater than 25 degrees and not more than 40 degrees, the display brightness compensation value is set to 30 of the reference brightness value. %; and / or, when the angle is greater than 40 degrees and not greater than 60 degrees, the display brightness compensation value is set to 20% of the reference brightness value; wherein, the reference brightness value is determined according to the current ambient light brightness value Brightness value.
  • calculating the backlight current value required to obtain the display brightness compensation value may be: converting the display brightness compensation value to the backlight current required to obtain the display brightness compensation value according to the number of backlights of the display screen value.
  • Step 14 Adjust the backlight brightness of the display according to the reference backlight data and the compensated backlight data.
  • the backlight brightness of the display screen is adjusted according to the reference backlight data and the compensation backlight data: adding the determined reference backlight data and the compensation backlight data to obtain backlight data of the display screen, Adjust the backlight brightness of the display according to the backlight data of the display.
  • the determined reference backlight data and the compensated backlight data are respectively a backlight current value converted according to the display screen luminance value obtained in step 11 and a backlight current value converted according to the display screen luminance compensation value obtained in step 13. Therefore, the backlight data of the display screen obtained by adding the reference backlight data and the compensated backlight data is a backlight current value. The backlight brightness of the display screen is adjusted according to the backlight current value.
  • the determined reference backlight data and the compensated backlight data are the display screen brightness value obtained according to step 11 and the display screen brightness compensation value obtained according to step 13, respectively. Therefore, the backlight data of the display screen obtained by adding the reference backlight data and the compensated backlight data is a luminance value.
  • the luminance value is converted to the backlight current value required to obtain the luminance value according to the number of backlights of the display screen.
  • the backlight brightness of the display screen is adjusted according to the backlight current value.
  • the brightness value is converted into a corresponding backlight current value according to the number of backlights of the display screen.
  • the apparatus for adjusting the brightness of the display screen includes a reference backlight processing module 31, an identification processing module 32, and a backlight adjustment module 33;
  • the reference backlight processing module 31 is configured to: when the ambient light brightness value of the display screen exceeds the set value, obtain the reference backlight data of the display screen according to the current ambient light brightness value;
  • the identification processing module 32 is configured to: acquire location data facing the identification information in the image collected by the display screen, and determine compensation backlight data of the display screen according to the location data;
  • the backlight adjustment module 33 is configured to adjust the backlight brightness of the display screen according to the reference backlight data and the compensation backlight data.
  • the apparatus further includes an image acquisition module 34 configured to: collect an image facing the display screen.
  • the device for adjusting the brightness of the display screen provided in this embodiment is, for example, disposed on a mobile terminal, and the image capturing module is, for example, a front camera of the mobile terminal, or a camera that can be rotated to the display screen of the mobile terminal, and is configured to: capture the front of the camera in real time.
  • the image acquisition module is a former camera.
  • the current camera can also be set to: when the display backlight is adjusted, in order to save energy, the front camera is not in full working state, and can be collected by one of red, green and blue pixels by means of interlaced scanning.
  • the head can also be set to: when the backlight is adjusted, the captured image is not displayed on the display and is only stored in the storage area.
  • the ambient light sensor is used to monitor the ambient light brightness.
  • the ambient light brightness value obtained by the ambient light sensor exceeds the set value, it indicates that the ambient light brightness is sufficient to affect the display information of the human eye recognition mobile terminal.
  • the front camera is activated to take an image.
  • the front camera can also be used to determine the ambient light level.
  • the setting value of the ambient light brightness is a preset value of the preset ambient light brightness, which can be preset by the mobile terminal manufacturer.
  • the reference backlight processing module pre-stores the correspondence between the ambient light brightness value and the display screen brightness value, and the reference backlight processing module is configured to:
  • the display screen brightness value corresponding to the current ambient light brightness value is searched according to the preset correspondence relationship, and the found display screen brightness value is used as the reference backlight data of the display screen.
  • the identification processing module extracts an image of the display screen collected by the image acquisition module from the storage area, identifies the location of the identification information in the image, and obtains the location data of the identified identification information, and obtains the obtained
  • the location data identifying the information determines the compensated backlight data for the display.
  • the identification information is, for example, a human eye or a human face.
  • the acquisition process for compensating the backlight data is the same as that described in the above method, and thus will not be described herein.
  • the backlight adjustment module is configured to: adjust the brightness of the display screen based on the ambient light brightness value obtained by the ambient light sensor, and then according to the location information of the identification information (such as a human eye or a human face) (mainly a person) The angle between the eye or face and the vertical direction of the display) continues to adjust the backlight brightness of the display. That is, the backlight adjustment module automatically adjusts the backlight brightness of the display screen according to the backlight data of the display screen obtained from the reference backlight data and the compensation backlight data.
  • the reference backlight processing module determines a brightness value of the display screen by using an ambient light brightness value obtained by the ambient light sensor, and calculates a backlight current required to obtain the brightness value of the display screen. Value (ie the reference backlight current value).
  • the recognition processing module obtains an angle between the human eye or the face and the vertical direction of the display screen according to the position data of the human eye or the human face.
  • the brightness of the measured display screen is lowered, according to the degree of brightness reduction, the display screen
  • the brightness is compensated, that is, according to the corresponding relationship between the preset angle and the brightness compensation value of the display screen, the brightness compensation value of the display screen corresponding to the obtained angle is determined, and the current value required to obtain the brightness compensation value of the display screen is calculated (ie, Compensate for backlight current value).
  • the backlight adjustment module increases the current value (ie, the compensated backlight current value) of the display screen compensated by the position of the human eye or the face to the former (ie, the reference backlight current value), and obtains the backlight data of the adjusted display screen.
  • the maximum current value is set, and when the total backlight current value of the display reaches the maximum current value, the backlight current value does not increase.
  • the backlight brightness of the display screen is adjusted with the maximum current value.
  • the display brightness value (or the display brightness compensation value) can be converted into a backlight current value required to obtain the display brightness value (or the display brightness compensation value).
  • the reference backlight processing module determines a reference display brightness value (ie, a reference backlight brightness value) by the ambient light brightness value obtained by the ambient light sensor.
  • the recognition processing module obtains an angle between the human eye or the face and the vertical direction of the display screen according to the human eye or the face position data. At this angle, the brightness of the measured display screen is lowered, according to the degree of brightness reduction, on the display screen.
  • the brightness is compensated, that is, according to the corresponding relationship between the preset angle and the display brightness compensation value, the brightness compensation value of the display screen corresponding to the obtained angle is determined.
  • the backlight adjustment module adds the reference backlight brightness value to the display brightness compensation value to obtain a backlight brightness value of the display screen (ie, as backlight data of the display screen), and calculates a backlight current value required to obtain the backlight brightness value.
  • the backlight power management chip of the display adjusts the backlight brightness of the display in real time according to the obtained backlight current value.
  • set the maximum current value when the total backlight current value of the display reaches the maximum current value, the backlight current value no longer increases, that is, the maximum current value is used to adjust the display. Backlight brightness.
  • the front camera is used as the recognition condition to identify the location data of the identification information (such as the human eye or the human face), and the compensated backlight data of the display screen is determined according to the obtained position data, and the ambient light is used.
  • the brightness value is used to determine the reference backlight data of the display screen, and the intelligent adjustment of the brightness of the display screen is realized according to the backlight data of the display screen determined by the reference backlight data and the compensation backlight data.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • the device/function module/functional unit in the above embodiment When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the embodiment of the present invention compensates for the problem that the display screen brightness is lowered due to the difference in the viewing position of the display screen by the identification information (such as the human eye or the human face) relative to the display screen, and realizes the brightness and the identification according to the ambient light.
  • the position of the information adjusts the brightness of the display in time, thereby ensuring that the user can clearly see the content displayed on the display under relatively strong external ambient light conditions, thereby improving the effect and experience of the user viewing the display screen.

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Abstract

L'invention concerne un procédé et un appareil permettant d'ajuster la luminosité d'un écran d'affichage. Le procédé consiste à : acquérir des données de rétroéclairage de référence d'un écran d'affichage en fonction de la valeur de luminosité de la lumière ambiante actuelle, lorsqu'une valeur de luminosité de la lumière ambiante où l'écran d'affichage est placé dépasse une valeur définie ; acquérir des données de position d'informations d'identification dans une image collectée faisant face à l'écran d'affichage et déterminer des données de rétroéclairage de compensation de l'écran d'affichage en fonction des données de position ; et ajuster la luminosité de rétroéclairage de l'écran d'affichage en fonction des données de rétroéclairage de référence et des données de rétroéclairage de compensation. Le problème selon lequel la luminosité d'un écran d'affichage est réduite, provoqué par différentes positions d'observation d'un utilisateur par rapport à l'écran d'affichage, est compensé par l'identification d'une position des informations d'identification (tel que l'œil humain ou un visage humain) par rapport à l'écran d'affichage, de telle sorte que la luminosité de l'écran d'affichage est ajustée dans le temps en fonction de la luminosité de la lumière ambiante et de la position des informations d'identification, ce qui permet de garantir qu'un utilisateur peut également voir le contenu affiché sur l'écran d'affichage de manière claire dans des conditions où la lumière ambiante externe est relativement intense, et d'améliorer l'effet pour un utilisateur visualisant l'écran d'affichage ainsi que l'expérience d'utilisation.
PCT/CN2015/089359 2015-03-23 2015-09-10 Procédé et appareil permettant d'ajuster la luminosité d'un écran d'affichage WO2016150112A1 (fr)

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CN201510128225.XA CN106157926A (zh) 2015-03-23 2015-03-23 一种调节显示屏亮度的方法及装置
CN201510128225.X 2015-03-23

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CN113012096A (zh) * 2020-12-28 2021-06-22 深圳精智达技术股份有限公司 显示屏子像素定位及亮度提取方法、设备以及存储介质
CN113900297A (zh) * 2021-10-13 2022-01-07 安徽亿普拉斯科技有限公司 基于微控制器且带有智能背光控制功能的液晶显示屏
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