WO2018094812A1 - Procédé et dispositif permettant d'ajuster la luminosité de rétroéclairage d'un écran de dispositif d'affichage à cristaux liquides - Google Patents

Procédé et dispositif permettant d'ajuster la luminosité de rétroéclairage d'un écran de dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2018094812A1
WO2018094812A1 PCT/CN2016/112859 CN2016112859W WO2018094812A1 WO 2018094812 A1 WO2018094812 A1 WO 2018094812A1 CN 2016112859 W CN2016112859 W CN 2016112859W WO 2018094812 A1 WO2018094812 A1 WO 2018094812A1
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WIPO (PCT)
Prior art keywords
data
brightness
backlight
screen
liquid crystal
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PCT/CN2016/112859
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English (en)
Chinese (zh)
Inventor
邹灵敏
杨国志
孟梁军
Original Assignee
深圳Tcl新技术有限公司
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Publication of WO2018094812A1 publication Critical patent/WO2018094812A1/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
    • G09G3/3406—Control of illumination source
    • 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

Definitions

  • the present invention relates to the field of brightness adjustment technology of liquid crystal displays, and more particularly to a method and apparatus for adjusting the brightness of a screen backlight of a liquid crystal display device.
  • the backlight module must ensure higher uniformity of the backlight of the entire screen.
  • the backlight source is mainly from incandescent bulbs, electro-optic panels (ELP), light-emitting diodes (LEDs), cold cathode fluorescent tubes (CCFLs), etc. These sources are mostly non-uniform light sources.
  • ELP electro-optic panels
  • LEDs light-emitting diodes
  • CCFLs cold cathode fluorescent tubes
  • the backlight module uses a diffuser to A relatively uniform source of light is obtained in these uneven sources.
  • the uniformity of the backlight is more difficult to be secured.
  • a certain block will be brighter and a certain block will be darker.
  • the reason for these phenomena may be that the number of backlight modules increases with the number of productions, and some modules will have differences between them. This difference causes the backlight uniformity between TVs to be different. At present, it is difficult to solve the problem of uneven illumination of the smart home of the large panel through the diffuser.
  • the main object of the present invention is to provide a method and apparatus for adjusting the brightness of a screen backlight of a liquid crystal display device, and aim to solve the technical problem that it is difficult to solve the problem of uneven illumination of a smart home of a large panel by a diffuser.
  • the present invention provides a method of adjusting the brightness of a screen backlight of a liquid crystal display device, the method comprising the steps of:
  • the liquid crystal display device screen receives, by the brightness sensor, the liquid crystal display device screen backlight brightness data obtained by scanning the liquid crystal display device screen;
  • the backlight brightness data of the liquid crystal display device screen is adjusted correspondingly by the brightness compensation data.
  • the backlight brightness data corresponding to each coordinate point in the coordinate graph is sorted in ascending order to obtain screen backlight brightness standard data, and the screen backlight brightness standard data and each coordinate point in the coordinate graph are calculated.
  • the steps of the brightness compensation data of the corresponding backlight brightness data include:
  • the backlight brightness data corresponding to each coordinate point in the coordinate map is sequentially subtracted from the screen backlight brightness standard data to obtain corresponding brightness compensation data.
  • the backlight brightness data corresponding to each coordinate point in the coordinate map is sequentially subtracted from the screen backlight brightness standard data, and the step of obtaining corresponding brightness compensation data includes:
  • the corresponding brightness compensation data is less than or equal to the preset data, the corresponding brightness compensation data is ignored.
  • the method further includes:
  • the backlight brightness data of the picture is acquired before the screen is replaced;
  • the present invention also provides a method for adjusting the brightness of a screen backlight of a liquid crystal display device, the method comprising the following steps:
  • the liquid crystal display device screen receives, by the brightness sensor, the liquid crystal display device screen backlight brightness data obtained by scanning the liquid crystal display device screen;
  • the backlight brightness data of the liquid crystal display device screen is adjusted correspondingly by the brightness compensation data.
  • the step of selecting the screen backlight brightness standard data, and calculating the brightness compensation data of the backlight brightness data corresponding to each coordinate point in the coordinate map of the screen backlight brightness standard data includes:
  • the backlight luminance data corresponding to each coordinate point in the coordinate graph is sequentially compared, and the maximum backlight luminance data in the backlight luminance data corresponding to each coordinate point in the coordinate graph is acquired;
  • the backlight brightness data corresponding to each coordinate point in the coordinate map is sequentially subtracted from the screen backlight brightness standard data to obtain corresponding brightness compensation data.
  • the backlight brightness data corresponding to each coordinate point in the coordinate map is sequentially subtracted from the screen backlight brightness standard data, and the step of obtaining corresponding brightness compensation data includes:
  • the corresponding brightness compensation data is less than or equal to the preset data, the corresponding brightness compensation data is ignored.
  • the step of adjusting, by the brightness compensation data, the backlight brightness data of the liquid crystal display device screen comprises:
  • the brightness compensation data is added to the backlight brightness data of the corresponding coordinate point.
  • the method further comprises:
  • the backlight brightness data of the picture is acquired before the screen is replaced;
  • the present invention further provides an apparatus for adjusting brightness of a screen backlight of a liquid crystal display device, the apparatus comprising:
  • a receiving module configured to receive screen backlight brightness data of the liquid crystal display device obtained by scanning the liquid crystal display device screen from the brightness sensor;
  • Establishing a module configured to establish a coordinate map according to the screen size of the liquid crystal display device and the backlight brightness data of the liquid crystal display device, where the coordinate map includes backlight brightness data corresponding to each coordinate point;
  • a calculation module configured to select screen backlight brightness standard data, and calculate brightness compensation data of the backlight brightness data corresponding to each coordinate point in the coordinate data of the screen backlight brightness standard data;
  • the first adjustment module is configured to adjust backlight brightness data of the liquid crystal display device screen correspondingly by the brightness compensation data.
  • the calculating module includes:
  • a comparison unit configured to sequentially compare backlight brightness data corresponding to each coordinate point in the coordinate map, and obtain maximum backlight brightness data in backlight brightness data corresponding to each coordinate point in the coordinate map;
  • a selecting unit configured to select the maximum backlight brightness data as screen backlight brightness standard data
  • a subtraction unit configured to sequentially subtract the backlight luminance data corresponding to each coordinate point in the coordinate map, and obtain corresponding brightness compensation data.
  • the subtracting unit includes:
  • a comparing unit configured to compare the corresponding brightness compensation data with preset data
  • a saving unit configured to save the corresponding brightness compensation data if the corresponding brightness compensation data is greater than the preset data
  • the ignoring unit is configured to ignore the corresponding brightness compensation data if the corresponding brightness compensation data is less than or equal to the preset data.
  • the first adjustment module includes:
  • An acquiring unit configured to acquire backlight brightness data corresponding to the coordinate point of the brightness compensation data
  • an adding unit configured to add the brightness compensation data to backlight brightness data of a corresponding coordinate point.
  • the device further includes:
  • a generating module configured to generate and save a brightness compensation data coordinate graph based on backlight brightness data when the backlight brightness data of the liquid crystal display device screen is consistent;
  • An acquiring module configured to acquire backlight brightness data of the screen before the screen is replaced during the playing process
  • the second adjustment module is configured to adjust backlight brightness data of the picture according to the brightness compensation data coordinate map based on the backlight brightness data.
  • the present invention receives screen brightness data of a liquid crystal display device obtained by scanning a screen of a liquid crystal display device from a brightness sensor; and establishing a coordinate map based on a screen size of the liquid crystal display device and brightness of the screen backlight of the liquid crystal display device, the coordinates
  • the figure includes backlight brightness data corresponding to each coordinate point; selecting screen backlight brightness standard data, and calculating brightness compensation data of the backlight brightness data corresponding to each coordinate point in the coordinate map of the screen backlight brightness standard data;
  • the compensation data corresponds to adjusting the backlight brightness data of the liquid crystal display device screen.
  • the liquid crystal display device screen backlight luminance data obtained by scanning the liquid crystal display device screen from the brightness sensor is received by software in the liquid crystal display device; based on the liquid crystal display device screen size and the liquid crystal display device screen backlight
  • the brightness data is used to establish a coordinate map, the coordinate map includes backlight brightness data corresponding to each coordinate point; and the screen backlight brightness standard data is selected, and the backlight brightness data corresponding to each coordinate point in the coordinate map is calculated.
  • the brightness compensation data is adjusted by the brightness compensation data to adjust the backlight brightness data of the liquid crystal display device screen so that the backlight uniformity of the liquid crystal display device screen is uniform.
  • FIG. 1 is a schematic flow chart of a first embodiment of a method for adjusting brightness of a screen backlight of a liquid crystal display device according to the present invention
  • FIG. 2 is a step of the step of selecting the screen backlight brightness standard data of FIG. 1 and calculating the brightness compensation data of the backlight brightness data in the backlight brightness data table corresponding to the screen backlight brightness standard data and the liquid crystal display device brightness coordinate table.
  • FIG. 3 is another step of the step of selecting screen backlight brightness standard data of FIG. 1 and calculating brightness compensation data of backlight brightness data in the backlight brightness data table corresponding to the screen backlight brightness standard data and the liquid crystal display screen brightness coordinate Refine the schematic diagram of the process;
  • FIG. 4 is a schematic flow chart showing the steps of adjusting the backlight luminance data of the screen of the liquid crystal display device by the brightness compensation data in FIG. 1;
  • FIG. 5 is a schematic flow chart of a second embodiment of a method for adjusting brightness of a screen backlight of a liquid crystal display device according to the present invention.
  • FIG. 6 is a schematic diagram of functional modules of a first embodiment of an apparatus for adjusting brightness of a screen backlight of a liquid crystal display device according to the present invention
  • FIG. 7 is a schematic diagram of a refinement function module of the calculation module of FIG. 6;
  • FIG. 8 is a schematic diagram of another refinement function module of the calculation module of FIG. 6;
  • FIG. 9 is a schematic diagram of a refinement function module of the first adjustment module of FIG. 6;
  • FIG. 10 is a schematic diagram of functional modules of a second embodiment of an apparatus for adjusting brightness of a screen backlight of a liquid crystal display device according to the present invention.
  • the present invention provides a method of adjusting the brightness of a screen backlight of a liquid crystal display device.
  • FIG. 1 is a schematic flow chart of a first embodiment of a method for adjusting brightness of a screen backlight of a liquid crystal display device according to the present invention.
  • the method comprises:
  • Step S100 receiving liquid crystal display device screen backlight brightness data obtained by scanning the liquid crystal display device screen from the brightness sensor.
  • the backlight of the liquid crystal display device to be corrected needs to be adjusted to the minimum brightness, and the liquid crystal display device displays a black screen, and then the brightness sensor and the liquid crystal display are displayed.
  • Device connection in order to ensure that the embodiment can be implemented normally, before the implementation of the embodiment, the backlight of the liquid crystal display device to be corrected needs to be adjusted to the minimum brightness, and the liquid crystal display device displays a black screen, and then the brightness sensor and the liquid crystal display are displayed.
  • the liquid crystal display device turns on the backlight correction function according to the user-initiated turn-on command, and enters the backlight correction mode.
  • the brightness sensor scans the entire screen of the liquid crystal display device to obtain the liquid crystal display device screen backlight brightness data, and transmits the liquid crystal display device screen backlight brightness data to the liquid crystal display device.
  • the liquid crystal display device receives the liquid crystal display device screen backlight brightness data.
  • Step S200 establishing a coordinate map based on the screen size of the liquid crystal display device and the screen backlight brightness data of the liquid crystal display device, where the coordinate map includes backlight brightness data corresponding to each coordinate point.
  • the liquid crystal display device After receiving the backlight brightness data of the liquid crystal display device, the liquid crystal display device establishes a coordinate map by software based on the screen size of the liquid crystal display device and the backlight brightness data of the liquid crystal display device, wherein the coordinate map includes each coordinate point. Corresponding backlight brightness data. Specifically, a coordinate map matching the screen size of the liquid crystal display device is established by software, and then the backlight brightness data corresponding to each coordinate is marked into the coordinate map according to the screen backlight brightness data of the liquid crystal display device, such as coordinates (1, 2). The backlight brightness data is 10, and the point corresponding to the coordinates (1, 2) is 10 .
  • Step S300 Select screen backlight brightness standard data, and calculate brightness compensation data of the backlight brightness data corresponding to each coordinate point in the screen backlight brightness standard data.
  • the backlight brightness data in the coordinate map is selected as the screen backlight brightness standard data, and the brightness compensation data of the backlight brightness data corresponding to each coordinate point in the coordinate map is calculated.
  • the backlight brightness data corresponding to each coordinate point in the coordinate map may be sequentially subtracted from the screen backlight brightness standard data to obtain corresponding brightness compensation data.
  • Step S400 adjusting backlight brightness data of the liquid crystal display device screen correspondingly by the brightness compensation data.
  • the backlight brightness data of the liquid crystal display device screen is adjusted correspondingly according to the brightness compensation data. Thereby, the backlight luminance data of each place of the liquid crystal display device screen is the same.
  • the liquid crystal display device screen backlight brightness data obtained by scanning the liquid crystal display device screen from the brightness sensor is received; and the coordinate map is established based on the liquid crystal display device screen size and the liquid crystal display device screen backlight brightness data,
  • the coordinate map includes backlight brightness data corresponding to each coordinate point; the screen backlight brightness standard data is selected, and brightness compensation data of the backlight brightness data corresponding to each coordinate point in the coordinate map is calculated;
  • the brightness compensation data corresponds to adjusting the backlight brightness data of the screen of the liquid crystal display device.
  • the liquid crystal display device screen backlight luminance data obtained by scanning the liquid crystal display device screen from the brightness sensor is received by software in the liquid crystal display device; based on the liquid crystal display device screen size and the liquid crystal display device screen backlight
  • the brightness data is used to establish a coordinate map, the coordinate map includes backlight brightness data corresponding to each coordinate point; and the screen backlight brightness standard data is selected, and the backlight brightness data corresponding to each coordinate point in the coordinate map is calculated.
  • the brightness compensation data is adjusted by the brightness compensation data to adjust the backlight brightness data of the liquid crystal display device screen so that the backlight uniformity of the liquid crystal display device screen is uniform.
  • FIG. 2 is a step of calculating brightness compensation data of backlight brightness data corresponding to each coordinate point in the coordinate data of the screen backlight brightness standard data in FIG. A detailed process diagram.
  • the step S300 may include:
  • Step S310 sequentially comparing the backlight luminance data corresponding to each coordinate point in the coordinate map, and acquiring maximum backlight luminance data in the backlight luminance data corresponding to each coordinate point in the coordinate graph;
  • Step S320 selecting the maximum backlight brightness data as screen backlight brightness standard data
  • Step S330 sequentially subtracting the backlight brightness data corresponding to each coordinate point in the coordinate map of the screen backlight brightness standard data to obtain corresponding brightness compensation data.
  • the method for selecting the screen backlight brightness standard data may sequentially compare the backlight brightness data corresponding to each coordinate point in the coordinate map, and obtain the backlight brightness data corresponding to each coordinate point in the coordinate map.
  • the maximum backlight brightness data is then selected as the screen backlight brightness standard data.
  • the backlight luminance data corresponding to each coordinate point in the coordinate graph may be sorted in ascending order, and the maximum backlight luminance data in the backlight luminance data corresponding to each coordinate point in the coordinate graph may be acquired.
  • the backlight brightness data corresponding to each coordinate point in the coordinate map is sequentially subtracted from the screen backlight brightness standard data, and the brightness compensation data corresponding to each coordinate is obtained.
  • FIG. 3 is a screen backlight brightness standard data of FIG. 1 , and calculating brightness of backlight brightness data in a backlight brightness data table corresponding to the screen backlight brightness standard data and the liquid crystal display screen brightness coordinate. Another refinement flow diagram of the steps of compensating data.
  • the step S300 may further include:
  • Step S340 comparing the corresponding brightness compensation data with preset data
  • Step S350 if the corresponding brightness compensation data is greater than the preset data, save the corresponding brightness compensation data;
  • Step S360 If the corresponding brightness compensation data is less than or equal to the preset data, the corresponding brightness compensation data is ignored.
  • the corresponding brightness compensation data may be compared with the preset data, where the preset data is generally zero, and the specific data may be taken according to the uniform requirement of the backlight required by the user. If the corresponding brightness compensation data is greater than the preset data, it is determined that the coordinate brightness data corresponding to the corresponding brightness compensation data and the standard brightness data are not within the preset range of the user, and the corresponding brightness compensation data is needed. Save and feedback for adjustment. If the corresponding brightness compensation data is less than or equal to the preset data, if the coordinate brightness data corresponding to the corresponding brightness compensation data and the standard brightness data are within a preset range of the user, the corresponding brightness may be ignored. Compensation data.
  • FIG. 4 is a refinement flow diagram of the steps of adjusting backlight luminance data of the screen of the liquid crystal display device by the brightness compensation data in FIG.
  • the step S400 may include:
  • Step S410 acquiring backlight brightness data corresponding to the coordinate point of the brightness compensation data
  • Step S420 adding the brightness compensation data to the backlight brightness data of the corresponding coordinate point.
  • the specific implementation method for adjusting the backlight brightness data of the screen of the liquid crystal display device by using the brightness compensation data may be: first acquiring backlight brightness data corresponding to the coordinate point of the brightness compensation data, and then using the brightness The compensation data is added to the backlight luminance data of the corresponding coordinate point. Makes the backlight brightness data for each position in the screen consistent.
  • FIG. 5 is a schematic flow chart of a second embodiment of a method for adjusting the brightness of a screen backlight of a liquid crystal display device according to the present invention.
  • the first embodiment of the method for adjusting the brightness of the screen backlight of the liquid crystal display device according to the present invention further includes:
  • Step S500 when the backlight brightness data of the liquid crystal display device screen is consistent, generating and storing a brightness compensation data coordinate map based on the backlight brightness data;
  • Step S600 acquiring, during the playing process, backlight brightness data of the screen before the screen is replaced;
  • Step S700 adjusting backlight brightness data of the picture according to the brightness compensation data coordinate map based on the backlight brightness data.
  • the backlight brightness data of the liquid crystal display device screen is consistent at this time, and the brightness compensation data coordinate map based on the backlight brightness data is generated by software control, and then the brightness compensation data is generated.
  • the graph is saved.
  • the backlight brightness data of the screen to be played by the user is first acquired.
  • the backlight luminance data of the picture is then adjusted according to the brightness compensation data coordinate map based on the backlight brightness data.
  • the brightness compensation data coordinate map based on the backlight brightness data is generated and saved; during the playing process, the backlight brightness data of the picture is acquired before the screen is replaced; Adjusting backlight brightness data of the picture according to the brightness compensation data coordinate map based on the backlight brightness data.
  • the backlight brightness of the screen of the liquid crystal display device can be quickly adjusted, so that the backlight brightness of each position of the liquid crystal display device screen is uniform.
  • the present invention further provides an apparatus for adjusting the brightness of a screen backlight of a liquid crystal display device.
  • FIG. 6 is a schematic diagram of functional modules of a first embodiment of an apparatus for adjusting brightness of a screen backlight of a liquid crystal display device according to the present invention.
  • the apparatus comprises:
  • the receiving module 100 is configured to receive liquid crystal display device screen backlight brightness data obtained by scanning the liquid crystal display device screen from the brightness sensor.
  • the backlight of the liquid crystal display device to be corrected needs to be adjusted to the minimum brightness, and the liquid crystal display device displays a black screen, and then the brightness sensor and the liquid crystal display are displayed.
  • Device connection in order to ensure that the embodiment can be implemented normally, before the implementation of the embodiment, the backlight of the liquid crystal display device to be corrected needs to be adjusted to the minimum brightness, and the liquid crystal display device displays a black screen, and then the brightness sensor and the liquid crystal display are displayed.
  • the liquid crystal display device turns on the backlight correction function according to the user-initiated turn-on command, and enters the backlight correction mode.
  • the brightness sensor scans the entire screen of the liquid crystal display device to obtain the liquid crystal display device screen backlight brightness data, and transmits the liquid crystal display device screen backlight brightness data to the liquid crystal display device.
  • the liquid crystal display device receives the liquid crystal display device screen backlight brightness data.
  • the establishing module 200 is configured to establish a coordinate map based on the screen size of the liquid crystal display device and the screen backlight brightness data of the liquid crystal display device, where the coordinate map includes backlight brightness data corresponding to each coordinate point.
  • the liquid crystal display device After receiving the backlight brightness data of the liquid crystal display device, the liquid crystal display device establishes a coordinate map by software based on the screen size of the liquid crystal display device and the backlight brightness data of the liquid crystal display device, wherein the coordinate map includes each coordinate point. Corresponding backlight brightness data. Specifically, a coordinate map matching the screen size of the liquid crystal display device is established by software, and then the backlight brightness data corresponding to each coordinate is marked into the coordinate map according to the screen backlight brightness data of the liquid crystal display device, such as coordinates (1, 2). The backlight brightness data is 10, and the point corresponding to the coordinates (1, 2) is 10 .
  • the calculation module 300 is configured to select screen backlight brightness standard data, and calculate brightness compensation data of the backlight brightness data corresponding to each coordinate point in the screen backlight brightness standard data.
  • the backlight brightness data in the coordinate map is selected as the screen backlight brightness standard data, and the brightness compensation data of the backlight brightness data corresponding to each coordinate point in the coordinate map is calculated.
  • the backlight brightness data corresponding to each coordinate point in the coordinate map may be sequentially subtracted from the screen backlight brightness standard data to obtain corresponding brightness compensation data.
  • the first adjustment module 400 is configured to adjust backlight brightness data of the liquid crystal display device screen correspondingly by the brightness compensation data.
  • the backlight brightness data of the liquid crystal display device screen is adjusted correspondingly according to the brightness compensation data. Thereby, the backlight luminance data of each place of the liquid crystal display device screen is the same.
  • the liquid crystal display device screen backlight brightness data obtained by scanning the liquid crystal display device screen from the brightness sensor is received; and the coordinate map is established based on the liquid crystal display device screen size and the liquid crystal display device screen backlight brightness data,
  • the coordinate map includes backlight brightness data corresponding to each coordinate point; the screen backlight brightness standard data is selected, and brightness compensation data of the backlight brightness data corresponding to each coordinate point in the coordinate map is calculated;
  • the brightness compensation data corresponds to adjusting the backlight brightness data of the screen of the liquid crystal display device.
  • the liquid crystal display device screen backlight luminance data obtained by scanning the liquid crystal display device screen from the brightness sensor is received by software in the liquid crystal display device; based on the liquid crystal display device screen size and the liquid crystal display device screen backlight
  • the brightness data is used to establish a coordinate map, the coordinate map includes backlight brightness data corresponding to each coordinate point; and the screen backlight brightness standard data is selected, and the backlight brightness data corresponding to each coordinate point in the coordinate map is calculated.
  • the brightness compensation data is adjusted by the brightness compensation data to adjust the backlight brightness data of the liquid crystal display device screen so that the backlight uniformity of the liquid crystal display device screen is uniform.
  • FIG. 7 is a schematic diagram of a refinement function module of the computing module of FIG. 6.
  • the calculating module 300 may include:
  • the comparing unit 310 sequentially compares the backlight brightness data corresponding to each coordinate point in the coordinate map, and obtains the maximum backlight brightness data in the backlight brightness data corresponding to each coordinate point in the coordinate graph;
  • the selecting unit 320 is configured to select the maximum backlight brightness data as screen backlight brightness standard data
  • the subtraction unit 330 sequentially subtracts the backlight luminance data corresponding to each coordinate point in the coordinate map from the screen backlight luminance standard data to obtain corresponding luminance compensation data.
  • the method for selecting the screen backlight brightness standard data may sequentially compare the backlight brightness data corresponding to each coordinate point in the coordinate map, and obtain the backlight brightness data corresponding to each coordinate point in the coordinate map.
  • the maximum backlight brightness data is then selected as the screen backlight brightness standard data.
  • the backlight luminance data corresponding to each coordinate point in the coordinate graph may be sorted in ascending order, and the maximum backlight luminance data in the backlight luminance data corresponding to each coordinate point in the coordinate graph may be acquired.
  • the backlight brightness data corresponding to each coordinate point in the coordinate map is sequentially subtracted from the screen backlight brightness standard data, and the brightness compensation data corresponding to each coordinate is obtained.
  • FIG. 8 is a schematic diagram of another refinement function module of the computing module of FIG.
  • the calculating module 300 may further include:
  • the comparing unit 340 is configured to compare the corresponding brightness compensation data with preset data
  • the saving unit 350 is configured to save the corresponding brightness compensation data if the corresponding brightness compensation data is greater than the preset data
  • the ignoring unit 360 is configured to ignore the corresponding brightness compensation data if the corresponding brightness compensation data is less than or equal to the preset data.
  • the corresponding brightness compensation data may be compared with the preset data, where the preset data is generally zero, and the specific data may be taken according to the uniform requirement of the backlight required by the user. If the corresponding brightness compensation data is greater than the preset data, it is determined that the coordinate brightness data corresponding to the corresponding brightness compensation data and the standard brightness data are not within the preset range of the user, and the corresponding brightness compensation data is needed. Save and feedback for adjustment. If the corresponding brightness compensation data is less than or equal to the preset data, if the coordinate brightness data corresponding to the corresponding brightness compensation data and the standard brightness data are within a preset range of the user, the corresponding brightness may be ignored. Compensation data.
  • FIG. 9 is a schematic diagram of a refinement function module of the first adjustment module in FIG.
  • the first adjustment module 400 may include:
  • the acquiring unit 410 is configured to acquire backlight brightness data corresponding to the coordinate point of the brightness compensation data
  • the adding unit 420 is configured to add the brightness compensation data to the backlight brightness data of the corresponding coordinate point.
  • the specific implementation method for adjusting the backlight brightness data of the screen of the liquid crystal display device by using the brightness compensation data may be: first acquiring backlight brightness data corresponding to the coordinate point of the brightness compensation data, and then using the brightness The compensation data is added to the backlight luminance data of the corresponding coordinate point. Makes the backlight brightness data for each position in the screen consistent.
  • FIG. 10 is a schematic diagram of functional modules of a second embodiment of an apparatus for adjusting the brightness of a screen backlight of a liquid crystal display device according to the present invention.
  • a first embodiment of the apparatus for adjusting the brightness of a screen backlight of a liquid crystal display device according to the present invention further comprising:
  • the generating module 500 is configured to generate and save a brightness compensation data coordinate map based on the backlight brightness data when the backlight brightness data of the liquid crystal display device screen is consistent;
  • the obtaining module 600 is configured to acquire backlight brightness data of the screen before the screen is replaced during the playing process;
  • the second adjustment module 700 is configured to adjust backlight brightness data of the picture according to the brightness compensation data coordinate map based on the backlight brightness data.
  • the backlight brightness data of the liquid crystal display device screen is consistent at this time, and the brightness compensation data coordinate map based on the backlight brightness data is generated by software control, and then the brightness compensation data is generated.
  • the graph is saved.
  • the backlight brightness data of the screen to be played by the user is first acquired.
  • the backlight luminance data of the picture is then adjusted according to the brightness compensation data coordinate map based on the backlight brightness data.
  • the brightness compensation data coordinate map based on the backlight brightness data is generated and saved; during the playing process, the backlight brightness data of the picture is acquired before the screen is replaced; Adjusting backlight brightness data of the picture according to the brightness compensation data coordinate map based on the backlight brightness data.
  • the backlight brightness of the screen of the liquid crystal display device can be quickly adjusted, so that the backlight brightness of each position of the liquid crystal display device screen is uniform.

Abstract

L'invention concerne un dispositif permettant d'ajuster la luminosité de rétroéclairage d'un écran de dispositif d'affichage à cristaux liquides, et un procédé permettant d'ajuster la luminosité de rétroéclairage d'un écran de dispositif d'affichage à cristaux liquides. Le procédé comprend les étapes consistant : à recevoir des données de luminosité de rétroéclairage d'un écran de dispositif d'affichage à cristaux liquides qui sont obtenues lorsqu'un capteur de luminosité balaye l'écran de dispositif d'affichage à cristaux liquides (S100); à construire un graphe à coordonnées sur la base de la taille de l'écran de dispositif d'affichage à cristaux liquides et des données de luminosité de rétroéclairage dudit écran, le graphe à coordonnées incluant des données de luminosité de rétroéclairage qui correspondent à chaque point de coordonnées (S200); à sélectionner des données de norme de luminosité de rétroéclairage d'écran, et à calculer des données de compensation de luminosité pour les données de norme de luminosité de rétroéclairage d'écran et les données de luminosité de rétroéclairage correspondant à chaque point de coordonnées dans le graphe à coordonnées (S300); et à ajuster les données de luminosité de rétroéclairage pour l'écran de dispositif d'affichage à cristaux liquides de manière correspondante en fonction des données de compensation de luminosité (S400). Au moyen du procédé, la luminosité de rétroéclairage de l'écran de dispositif d'affichage à cristaux liquides peut être homogène.
PCT/CN2016/112859 2016-11-25 2016-12-29 Procédé et dispositif permettant d'ajuster la luminosité de rétroéclairage d'un écran de dispositif d'affichage à cristaux liquides WO2018094812A1 (fr)

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