CN114664265A - Brightness compensation method and brightness compensation device for display panel - Google Patents

Brightness compensation method and brightness compensation device for display panel Download PDF

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Publication number
CN114664265A
CN114664265A CN202210286303.9A CN202210286303A CN114664265A CN 114664265 A CN114664265 A CN 114664265A CN 202210286303 A CN202210286303 A CN 202210286303A CN 114664265 A CN114664265 A CN 114664265A
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compensated
lamp panel
light
distance
lamp
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CN114664265B (en
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陈胤宏
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TCL China Star Optoelectronics Technology Co Ltd
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TCL China Star Optoelectronics Technology Co Ltd
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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
    • G09G3/22—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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The application relates to a brightness compensation method and a brightness compensation device of a display panel, wherein the method comprises the following steps: acquiring the distance between at least one lamp panel to be compensated and the power module; and adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power module so as to compensate the brightness of the display panel. Through the operating condition of at least one first luminescence unit and/or the operating condition of at least one second luminescence unit in each lamp plate that waits to compensate according to at least one lamp plate that waits to compensate and power module's distance adjustment, the inhomogeneous phenomenon of mains voltage distribution that this application can improve because of each lamp plate and the difference of power distance causes promotes the uniformity of each lamp plate luminance, and then improves and shows inhomogeneous phenomenon, simultaneously because this application need not improve mains voltage and come compensation luminance, can save the consumption.

Description

Brightness compensation method and brightness compensation device for display panel
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a brightness compensation method and a brightness compensation apparatus for a display panel.
Background
The mini-LED (mini-LED) technology has many advantages such as high brightness, high contrast, and power saving, and can be applied to products of different sizes from mobile phones to televisions according to the requirements of product specifications. The mini-LED utilizes a large number of micro-LEDs as backlight, and combines a Local backlight adjusting (i.e., Local Dimming) technique to adjust the backlight of different areas, so as to more accurately control the lighting of the display panel.
Fig. 1 shows a schematic diagram of a related art mini-LED driving architecture. Referring to fig. 1, in the related art, a lamp panel a, a lamp panel B, and a lamp panel C are powered by a power board 11. Each lamp panel of the mini-LED display panel can comprise a certain number of micro LEDs. In actual work, each lamp plate is as different subregion, and inside whole LEDs of each lamp plate can light simultaneously. The control panel is connected with lamp plate A, lamp plate B and lamp plate C electricity respectively for control each lamp plate is lighted.
However, in fig. 1, the lamp panels are at different distances from the power panel, and the same power supply is used for supplying power. Because the existence of power cord line loss, consequently apart from the lamp plate of power strip farther, there is certain loss in the more ideal value of the power of this lamp plate reality of input, and then leads to apart from the lamp plate luminance of power strip farther lower, produces and shows inhomogeneous phenomenon.
Disclosure of Invention
In view of this, the present application provides a brightness compensation method and a brightness compensation apparatus for a display panel, which can improve the phenomenon of uneven distribution of power supply voltage caused by different distances between each lamp panel and a power supply, improve the uniformity of brightness of each lamp panel, and further improve the phenomenon of uneven display.
According to an aspect of the present application, a brightness compensation method for a display panel is provided, where the display panel includes a power module, a control module, and a plurality of lamp panels arranged in a row and column manner, where the power module is electrically connected to the plurality of lamp panels, respectively, and the power module is configured to provide power for the plurality of lamp panels; the control module is electrically connected with the lamp panels respectively and is used for executing the brightness compensation method; each lamp panel comprises at least one row of first light-emitting units and at least one row of second light-emitting units; the brightness compensation method includes: obtaining the distance between at least one lamp panel to be compensated and the power supply module; and adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power module so as to compensate the brightness of the display panel.
Further, acquire at least one lamp plate that waits to compensate with power module's distance includes: acquiring a row number of a row where each lamp panel to be compensated is located and a column number of a column where each lamp panel to be compensated is located in the at least one lamp panel to be compensated; and determining the distance between the at least one lamp panel to be compensated and the power supply module according to the row number of the row where each lamp panel to be compensated is located and the column number of the column where each lamp panel to be compensated is located.
Further, determining a distance between the at least one lamp panel to be compensated and the power module according to a row number of each lamp panel to be compensated in the at least one lamp panel to be compensated and a column number of each column thereof, including: acquiring a row number and a column number of a lamp panel closest to the power supply module, and taking the lamp panel as a reference lamp panel; comparing the difference value between the row number of each lamp panel to be compensated and the row number of the reference lamp panel to obtain a first difference value; comparing the difference value between the column number of each lamp panel to be compensated and the column number of the reference lamp panel to obtain a second difference value; and determining the distance between the at least one lamp panel to be compensated and the power supply module according to the first difference value and the second difference value.
Further, the operating status of each light-emitting unit includes a first operating status and a second operating status, and the operating status of at least one first light-emitting unit and/or the operating status of at least one second light-emitting unit in each to-be-compensated lamp panel is adjusted according to the distance between the at least one to-be-compensated lamp panel and the power module, including: adjusting part or all of at least one row of first light-emitting units in each lamp panel to be compensated to be in a first working state according to the distance between the at least one lamp panel to be compensated and the power module, wherein the rest of the first light-emitting units in each lamp panel to be compensated are in a second working state; and/or some or all of the second light-emitting units in at least one row of second light-emitting units in each lamp panel to be compensated are in a first working state, and the rest of the second light-emitting units in each lamp panel to be compensated are in a second working state.
Further, the at least one lamp panel to be compensated includes a first lamp panel to be compensated and a second lamp panel to be compensated, and a part or all of the first light-emitting units in at least one row of the first light-emitting units in each lamp panel to be compensated are adjusted to be in a first working state according to a distance between the at least one lamp panel to be compensated and the power module, including: when the distance between the first lamp panel to be compensated and the power module is greater than the distance between the second lamp panel to be compensated and the power module, the number of first light-emitting units in the first working state in the first lamp panel to be compensated is greater than the number of first light-emitting units in the first working state in the second lamp panel to be compensated; when the distance between the first lamp panel to be compensated and the power module is smaller than the distance between the second lamp panel to be compensated and the power module, the number of the first light-emitting units in the first working state in the first lamp panel to be compensated is smaller than the number of the first light-emitting units in the first working state in the second lamp panel to be compensated.
Further, the at least one lamp panel to be compensated includes a third lamp panel to be compensated and a fourth lamp panel to be compensated, and a part or all of the second light-emitting units in at least one row of the second light-emitting units in each lamp panel to be compensated are adjusted to be in a first working state according to a distance between the at least one lamp panel to be compensated and the power module, including: when the distance between the third to-be-compensated lamp panel and the power module is greater than the distance between the fourth to-be-compensated lamp panel and the power module, the number of second light-emitting units in the third to-be-compensated lamp panel in the first working state is greater than the number of second light-emitting units in the fourth to-be-compensated lamp panel in the first working state; when the distance between the third to-be-compensated lamp panel and the power module is smaller than the distance between the fourth to-be-compensated lamp panel and the power module, the number of the second light-emitting units in the first working state in the third to-be-compensated lamp panel is smaller than the number of the second light-emitting units in the first working state in the fourth to-be-compensated lamp panel.
Further, adjusting the operating state of at least one first light-emitting unit and/or the operating state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power module, further comprising: generating a corresponding driving signal according to the distance between the at least one lamp panel to be compensated and the power supply module; and adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the driving signal.
Further, the driving signal includes a plurality of pulses, each of the pulses is used to adjust a corresponding light emitting unit to be in a first working state, and generates a corresponding driving signal according to a distance between the at least one lamp panel to be compensated and the power module, including: calculating the number of the light-emitting units in the first working state in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power supply module; and randomly generating corresponding driving signals based on the number of the light-emitting units in the first working state in each lamp panel to be compensated, wherein the pulse number of the driving signals is the same as the number of the light-emitting units in the first working state in the corresponding lamp panel to be compensated.
Further, adjusting the operating state of at least one first light-emitting unit and/or the operating state of at least one second light-emitting unit in each lamp panel to be compensated according to the driving signal includes: randomly inputting the driving signals to each lamp panel to be compensated; and adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated by using the randomly input driving signal.
According to another aspect of the present application, a brightness compensation apparatus is provided, where the display panel includes a power module, a control module, and a plurality of lamp panels arranged in rows and columns, where the power module is electrically connected to the lamp panels, and the power module is configured to provide power for the lamp panels; the control module is electrically connected with the lamp panels respectively and is used for executing the brightness compensation method; each lamp panel comprises at least one row of first light-emitting units and at least one row of second light-emitting units; the luminance compensation apparatus includes: the distance acquisition module is used for acquiring the distance between at least one lamp panel to be compensated and the power supply module; and the adjusting module is electrically connected with the distance acquiring module and is used for adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power supply module so as to compensate the brightness of the display panel.
Through according to at least one treat the compensation lamp plate with power module's distance adjustment is individual treat the operating condition of compensation lamp plate in at least one first luminescence unit and/or the operating condition of at least one second luminescence unit, can improve the inhomogeneous phenomenon of mains voltage distribution because of each lamp plate and the difference of power distance cause according to the aspect of this application, promote the uniformity of each lamp plate luminance, and then improve and show inhomogeneous phenomenon, simultaneously because this application need not improve mains voltage and come compensation luminance, can save the consumption.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 shows a schematic diagram of a related art mini-LED driving architecture.
Fig. 2 shows a flowchart of an illumination compensation method according to an embodiment of the present application.
Fig. 3 is a schematic diagram illustrating a driving system of a display panel according to an embodiment of the present application.
Fig. 4 shows a schematic diagram of a lamp panel to be compensated according to an embodiment of the present application.
Fig. 5 shows a schematic diagram of a drive signal of an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.
The application mainly provides a brightness compensation method of a display panel, wherein the display panel comprises a power supply module, a control module and a plurality of lamp panels arranged in a row and column mode, wherein the power supply module is respectively electrically connected with the lamp panels and is used for supplying power to the lamp panels; the control module is electrically connected with the lamp panels respectively and is used for executing the brightness compensation method; each lamp panel comprises at least one row of first light-emitting units and at least one row of second light-emitting units; the brightness compensation method comprises the following steps: obtaining the distance between at least one lamp panel to be compensated and the power supply module; and adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power module so as to compensate the brightness of the display panel.
Through according to at least one treat the compensation lamp plate with power module's distance adjustment is individual treat the operating condition of compensation lamp plate in at least one first luminescence unit and/or the operating condition of at least one second luminescence unit, the inhomogeneous phenomenon of mains voltage distribution that this application can improve because of each lamp plate and the difference of power distance cause promotes the uniformity of each lamp plate luminance, and then improves and show inhomogeneous phenomenon, simultaneously because this application need not improve mains voltage and compensate luminance, can save the consumption.
Fig. 2 shows a flowchart of an illumination compensation method according to an embodiment of the present application.
As shown in FIG. 2, the brightness compensation method of the embodiment of the present application can be used for a mini-LED based display panel. It will be appreciated that the present application is equally applicable to other types of display panels, such as micro-LED based display panels, and the present application is not limited to the type of display panel.
Specifically, the brightness compensation method according to the embodiment of the present application may include:
step S1: obtaining the distance between at least one lamp panel to be compensated and the power supply module;
wherein, a plurality of lamp plates of this application embodiment can arrange according to the form of ranks. Each lamp plate all can include the miniature LED of fixed quantity, promptly, every lamp plate can form a subregion, and the mains voltage accessible of each subregion power module provides in unison.
Further, in each of the lamp panels, the plurality of micro LEDs of the lamp panel may also be arranged in a row and column manner. It should be noted that, in the embodiment of the present application, each of the lamp panels may include at least one row of first light emitting units and at least one row of second light emitting units. Wherein the first light emitting unit and the second light emitting unit may have different light emitting luminances. For example, the first light-emitting unit may be a micro LED having a low light-emitting brightness, and the second light-emitting unit may be a micro LED having a high light-emitting brightness.
For example, in each of the lamp panels, the first light emitting units and the second light emitting units may be alternately arranged in columns. For example, two adjacent columns of light emitting cells of a column of first light emitting cells may each be a second light emitting cell, and two adjacent columns of light emitting cells of a column of second light emitting cells may each be a first light emitting cell.
Further, the lamp panel to be compensated can be preset with a plurality of. Whether one lamp panel is the lamp panel to be compensated or not is judged, and the brightness of the corresponding display area of the lamp panel can be determined through manual observation or according to the brightness detected by an instrument. It can be understood that the present application is not limited to how to determine the lamp panel to be compensated.
Further, acquire at least one lamp plate that waits to compensate with power module's distance includes:
step S11: acquiring a row number of a row where each lamp panel to be compensated is located and a column number of a column where each lamp panel to be compensated is located in the at least one lamp panel to be compensated;
step S12: and determining the distance between the at least one lamp panel to be compensated and the power supply module according to the row number of the row where each lamp panel to be compensated is located and the column number of the column where each lamp panel to be compensated is located.
Fig. 3 is a schematic diagram illustrating a driving system of a display panel according to an embodiment of the present application.
As shown in fig. 3, the driving system of the display panel may include a control module 31, a gate driver 32, and a data driver 33. The control module 31 may be electrically connected to the gate driver 32 and the data driver 33, respectively. The lamp panel 34 may include a plurality of first light emitting units 35 and second light emitting units 36 arranged in rows and columns. The driving system may further include a power module (not shown in fig. 3), which may be electrically connected to each lamp panel. For example, the first light emitting unit and the second light emitting unit are micro LEDs, anodes of the LEDs may be respectively electrically connected to the data driver 33, and cathodes of the LEDs are grounded. A plurality of switching tubes may be disposed in the gate driver 32 to control whether to turn on the corresponding light emitting unit.
Referring to fig. 3, the individual light emitting units in lamp panel 34 may be numbered in rows and columns. For example, the first light emitting unit located at the upper left corner is denoted as a first light emitting unit (1,1), the former number indicates that the light emitting unit is located at the first row (i.e., the uppermost row), and the latter number indicates that the light emitting unit is located at the first column (i.e., the leftmost column). It is noted that there is a similar arrangement of light emitting units at the lamp panel level. For example, the lamp panel 34 in fig. 3 may be located at the upper left corner of the lamp panel array, denoted as lamp panel (1, 1). In the embodiments of the present application, similar representation methods are used for description, and are not described again.
For example, the power module may be located at the left side of the gate driver 32 and correspond to the gate driver 32 in the horizontal direction. At this time, the first light-emitting unit in the 1 st column in fig. 3 is closest to the power module, the first light-emitting unit in the 2 nd column is next to the power module, and so on. For the first light-emitting units in the same column, because the column numbers of the first light-emitting units in the column are the same, the distances from the first light-emitting units in the column to the power supply module are the same.
Further, determining a distance between the at least one lamp panel to be compensated and the power module according to a row number of each lamp panel to be compensated in the at least one lamp panel to be compensated and a column number of each column thereof, including:
step S121: acquiring a row number and a column number of a lamp panel closest to the power supply module, and taking the lamp panel as a reference lamp panel;
step S122: comparing the difference value between the row number of each lamp panel to be compensated and the row number of the reference lamp panel to obtain a first difference value;
step S123: comparing the difference value between the column number of each lamp panel to be compensated and the column number of the reference lamp panel to obtain a second difference value;
step S124: and determining the distance between the at least one lamp panel to be compensated and the power supply module according to the first difference value and the second difference value.
For example, referring to fig. 3, it is assumed that the power module may be located at the left side of the gate driver 32 and correspond to the gate driver 32 in the horizontal direction. If the lamp panel 34 is located at the upper left corner of the lamp panel array arranged in an array form, the lamp panels (1,1) (i.e., the lamp panel 34) can be selected as the reference lamp panel, and the reference lamp panel is used as the reference to position the specific positions of the other lamp panels, so as to obtain the distance between each lamp panel to be compensated and the power supply module.
Step S2: and adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power module so as to compensate the brightness of the display panel.
The working state of each light-emitting unit comprises a first working state and a second working state. Taking the light emitting units as micro LEDs as an example, the first operating state may be a light emitting state, and the second operating state may be a light off state.
Further, adjusting the operating state of at least one first light-emitting unit and/or the operating state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power module includes:
step S21: adjusting part or all of the first light-emitting units in at least one row of first light-emitting units in each lamp panel to be compensated to be in a first working state according to the distance between the at least one lamp panel to be compensated and the power supply module, wherein the rest of the first light-emitting units in each lamp panel to be compensated are in a second working state;
and/or some or all of the second light-emitting units in at least one row of second light-emitting units in each lamp panel to be compensated are in a first working state, and the rest of the second light-emitting units in each lamp panel to be compensated are in a second working state.
Fig. 4 shows a schematic diagram of a lamp panel to be compensated according to an embodiment of the present application.
As shown in fig. 4, the lamp panel 40 to be compensated may be any one of the at least one lamp panel to be compensated. The first light emitting cells 41 and the second light emitting cells 42 of different columns may be arranged in a cross. The light emitting cells filled with black indicate that the light emitting cells are in a light emitting state, and the light emitting cells not filled with black indicate that the light emitting cells are in a light off state. For example, of the 3 rd column from the left, 2 first light-emitting cells are in a light-emitting state, and the remaining 3 first light-emitting cells are in an off state. In fig. 4, the farther from the power source terminal, the greater the number of first light-emitting units emitting light in the corresponding column of first light-emitting units.
It should be noted that, in this embodiment of the application, for each lamp panel to be compensated, part or all of the first light-emitting units may be adjusted, part or all of the second light-emitting units may also be adjusted, and the first light-emitting units and the second light-emitting units may also be adjusted simultaneously. For example, in fig. 4, all the second light-emitting units in the lamp panel 40 may be in a lighting state, and the object of adjustment is each row of the first light-emitting units.
Further, the at least one lamp panel to be compensated includes a first lamp panel to be compensated and a second lamp panel to be compensated, and a part or all of the first light-emitting units in at least one row of the first light-emitting units in each lamp panel to be compensated are adjusted to be in a first working state according to a distance between the at least one lamp panel to be compensated and the power module, including:
step S211: when the distance between the first lamp panel to be compensated and the power module is greater than the distance between the second lamp panel to be compensated and the power module, the number of first light-emitting units in the first working state in the first lamp panel to be compensated is greater than the number of first light-emitting units in the first working state in the second lamp panel to be compensated;
step S212: when the distance between the first lamp panel to be compensated and the power module is smaller than the distance between the second lamp panel to be compensated and the power module, the number of the first light-emitting units in the first working state in the first lamp panel to be compensated is smaller than the number of the first light-emitting units in the first working state in the second lamp panel to be compensated.
Since the lamp panel array and the light emitting unit array in the embodiment of the present application are similar in structure, a method suitable for the light emitting unit array can be transplanted to the lamp panel array. Specifically, work as first wait to compensate the lamp plate with power module's distance is greater than the second wait to compensate the lamp plate with power module's distance, for example lamp plate (3,1) with power module's distance is greater than lamp plate (2,1) with power module's distance, and the mains voltage of lamp plate (3,1) actual input is less than lamp plate (2,1) actual input's voltage this moment, causes the luminance of lamp plate (3,1) to be less than the luminance of lamp plate (2, 1). Therefore, the first light-emitting units with more quantity can be arranged in the lamp panels (3 and 1) to emit light, so that the brightness loss of the lamp panels (3 and 1) caused by the distance from the power supply module is compensated, and the uniformity of the display panel is improved.
Further, the at least one lamp panel to be compensated includes a third lamp panel to be compensated and a fourth lamp panel to be compensated, and a part or all of the second light-emitting units in at least one row of the second light-emitting units in each lamp panel to be compensated are adjusted to be in a first working state according to a distance between the at least one lamp panel to be compensated and the power module, including:
step S213: when the distance between the third to-be-compensated lamp panel and the power module is greater than the distance between the fourth to-be-compensated lamp panel and the power module, the number of second light-emitting units in the third to-be-compensated lamp panel in the first working state is greater than the number of second light-emitting units in the fourth to-be-compensated lamp panel in the first working state;
step S214: when the distance between the third to-be-compensated lamp panel and the power module is smaller than the distance between the fourth to-be-compensated lamp panel and the power module, the number of the second light-emitting units in the first working state in the third to-be-compensated lamp panel is smaller than the number of the second light-emitting units in the first working state in the fourth to-be-compensated lamp panel.
Similar to the first to-be-compensated unit and the second to-be-compensated unit, the third to-be-compensated lamp panel and the fourth to-be-compensated lamp panel may also be provided with different numbers of second light-emitting units for lighting. The difference is that the object adjusted by the first to-be-compensated unit and the second to-be-compensated unit is the first light-emitting unit, and the object adjusted by the third to-be-compensated lamp panel and the fourth to-be-compensated lamp panel is the second light-emitting unit. It is understood that, in practical applications, the first light emitting unit and the second light emitting unit may be mixed and adjusted, and the present application is not limited thereto.
Further, adjusting the operating state of at least one first light-emitting unit and/or the operating state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power module, further comprising:
step S201: generating a corresponding driving signal according to the distance between the at least one lamp panel to be compensated and the power supply module;
step S202: and adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the driving signal.
Fig. 5 shows a schematic diagram of a drive signal of an embodiment of the present application.
As shown in fig. 5, the 3 columns of the first light emitting units in fig. 4 are laterally arranged for easy understanding. The driving signals 51, 52 and 53 may drive the first light emitting cells of different columns, respectively. For example, the driving signal 51 may drive the first light-emitting units at two ends of the first light-emitting unit in the 1 st column to be turned on, and the rest of the first light-emitting units to be turned off; the driving signal 52 may drive the 1 st and 3 rd light emitting cells in the 2 nd column of the first light emitting cells to be turned on, and the remaining light emitting cells to be turned off.
It should be noted that fig. 5 is exemplary. In addition to adjusting the operating state of the first light-emitting unit, the embodiment of the present application may also adjust the operating state of the second light-emitting unit. Further, the driving signal 51, the driving signal 52, and the driving signal 52 may be combined into one driving signal, and the first light emitting cells in different columns may be sequentially driven in time order.
Further, the driving signal includes a plurality of pulses, each of the pulses is used to adjust a corresponding light emitting unit to be in a first working state, and generates a corresponding driving signal according to a distance between the at least one lamp panel to be compensated and the power module, including:
step S2011: calculating the number of the light-emitting units in the first working state in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power supply module;
step S2012: and randomly generating corresponding driving signals based on the number of the light-emitting units in the first working state in each lamp panel to be compensated, wherein the pulse number of the driving signals is the same as the number of the light-emitting units in the first working state in the corresponding lamp panel to be compensated.
Referring to fig. 5, the driving signal 51 includes two pulses, both of which are at a high level, and the driving signal 51 is at a low level for the rest of the period. In practical applications, two pulses of the driving signal 51 may be at a low level, for example, a pulse level of-1V, and the driving signal 51 is at 0V in the rest period.
Further, adjusting the operating state of at least one first light-emitting unit and/or the operating state of at least one second light-emitting unit in each lamp panel to be compensated according to the driving signal includes:
step S2021: randomly inputting the driving signals to each lamp panel to be compensated;
step S2022: and adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated by using the randomly input driving signal.
Furthermore, each pulse of the driving signal can be randomly generated, so that the light-emitting units in the lamp panel to be compensated, which are in the first working state, are also randomly generated. The random generation may be performed in a variety of ways, such as by the Monte Carlo method. In addition, in the embodiment of the present application, the light emitting sequence of different first light emitting units or second light emitting units may also be randomly performed. It is to be understood that the present application is not limited as to how the individual pulses are randomly generated.
Through random generation each pulse of drive signal, and then make in the corresponding lamp plate that treats compensation be in first luminescence state first luminescence unit and/or second luminescence unit also random generation, this application embodiment can further avoid the inhomogeneous phenomenon of regional luminance, promotes the homogeneity that shows.
In addition, the application also provides a brightness compensation device, wherein the display panel comprises a power supply module, a control module and a plurality of lamp panels arranged in a row and column mode, wherein the power supply module is respectively electrically connected with the lamp panels and is used for providing power for the lamp panels; the control module is electrically connected with the lamp panels respectively and is used for executing the brightness compensation method; each lamp panel comprises at least one row of first light-emitting units and at least one row of second light-emitting units; the brightness compensation device includes: the distance acquisition module is used for acquiring the distance between at least one lamp panel to be compensated and the power supply module; and the adjusting module is electrically connected with the distance acquiring module and is used for adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power module so as to compensate the brightness of the display panel.
Further, the distance acquisition module includes: the row and column acquisition module is used for acquiring a row number of a row where each lamp panel to be compensated is positioned and a column number of a column where each lamp panel to be compensated is positioned; and the distance determining module is used for determining the distance between the at least one lamp panel to be compensated and the power supply module according to the row number and the column number of the row where each lamp panel to be compensated is located in the at least one lamp panel to be compensated.
Further, the distance determination module comprises: the reference acquisition module is used for acquiring the row number and the column number of the lamp panel closest to the power supply module and taking the lamp panel as a reference lamp panel; the first difference acquisition module is used for comparing the difference between the row number of each lamp panel to be compensated and the row number of the reference lamp panel to obtain a first difference; the second difference value acquisition module is used for comparing the difference value between the column number of each lamp panel to be compensated and the column number of the reference lamp panel to obtain a second difference value; and the distance determining submodule is used for determining the distance between the at least one lamp panel to be compensated and the power supply module according to the first difference and the second difference.
Further, the adjustment module includes: the line adjusting module is used for adjusting part or all of first light emitting units in at least one line of first light emitting units in each lamp panel to be compensated to be in a first working state according to the distance between the at least one lamp panel to be compensated and the power supply module, and the rest of first light emitting units in each lamp panel to be compensated are in a second working state; and/or some or all of the second light-emitting units in at least one row of second light-emitting units in each lamp panel to be compensated are in a first working state, and the rest of the second light-emitting units in each lamp panel to be compensated are in a second working state.
Further, the column adjustment module includes: the first adjusting module is configured to, when the distance between the first lamp panel to be compensated and the power module is greater than the distance between the second lamp panel to be compensated and the power module, increase the number of first light-emitting units in the first working state in the first lamp panel to be compensated than the number of first light-emitting units in the first working state in the second lamp panel to be compensated; and the second adjusting module is used for enabling the number of the first light-emitting units in the first working state in the first lamp panel to be compensated to be smaller than the number of the first light-emitting units in the first working state in the second lamp panel to be compensated when the distance between the first lamp panel to be compensated and the power supply module is smaller than the distance between the second lamp panel to be compensated and the power supply module.
Further, the column adjustment module includes: the third adjusting module is configured to, when a distance between the third to-be-compensated lamp panel and the power module is greater than a distance between the fourth to-be-compensated lamp panel and the power module, increase the number of second light-emitting units in the third to-be-compensated lamp panel in the first working state than the number of second light-emitting units in the fourth to-be-compensated lamp panel in the first working state; and the fourth adjusting module is used for enabling the number of the second light-emitting units in the first working state in the third to-be-compensated lamp panel to be smaller than that in the fourth to-be-compensated lamp panel when the distance between the third to-be-compensated lamp panel and the power supply module is smaller than that between the fourth to-be-compensated lamp panel and the power supply module.
Further, the column adjustment module further includes: the driving generation module is used for generating a corresponding driving signal according to the distance between the at least one lamp panel to be compensated and the power supply module; and the driving adjusting module is used for adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the driving signal.
Further, the drive generation module includes: the calculation module is used for calculating the number of the light-emitting units in the first working state in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power supply module; and the random generation module is used for randomly generating corresponding driving signals based on the number of the light-emitting units in the first working state in each lamp panel to be compensated, wherein the pulse number of the driving signals is the same as the number of the light-emitting units in the first working state in the corresponding lamp panel to be compensated.
Further, the driving adjustment module includes: the driving input module is used for randomly inputting the driving signals to each lamp panel to be compensated; and the random adjusting module is used for adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated by using the randomly input driving signal.
It should be noted that the control module may be a control chip. All can be provided with corresponding control chip on each lamp plate of this application embodiment, be used for producing drive signal. Further, the LEDs include a plurality of types, and different types of LEDs may emit light of different colors and different brightnesses and may be freely combined to display various images. Various modifications may be made to the different types of LEDs based on the inventive concept of the embodiments of the present application. It is understood that the present application is not limited to a specific driving architecture of the display panel and a type of the LED.
To sum up, this application is through according to at least one treat the compensation lamp plate with power module's distance adjustment is individual treat the operating condition of the different power supply voltage who causes of at least one first luminescence unit in the compensation lamp plate and/or the operating condition of at least one second luminescence unit, can improve because of each lamp plate and power distance distributes inhomogeneous phenomenon, promote the uniformity of each lamp plate luminance, and then improve and show inhomogeneous phenomenon, simultaneously because this application need not improve power supply voltage and come compensation luminance, can save the consumption.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above detailed description is provided for the brightness compensation method and the brightness compensation apparatus of the display panel provided in the embodiments of the present application, and the principle and the implementation of the present application are explained in this document by applying specific examples, and the description of the above embodiments is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (10)

1. A brightness compensation method for a display panel is characterized in that the display panel comprises a power supply module, a control module and a plurality of lamp panels arranged in a row and column manner,
the power supply module is electrically connected with the lamp panels respectively and is used for providing power for the lamp panels;
the control module is electrically connected with the lamp panels respectively and is used for executing the brightness compensation method;
each lamp panel comprises at least one row of first light-emitting units and at least one row of second light-emitting units;
the brightness compensation method includes:
obtaining the distance between at least one lamp panel to be compensated and the power supply module;
and adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power module so as to compensate the brightness of the display panel.
2. The method for compensating brightness of a display panel according to claim 1, wherein obtaining a distance between at least one lamp panel to be compensated and the power module comprises:
acquiring a row number of a row and a column number of a column of each lamp panel to be compensated in the at least one lamp panel to be compensated;
and determining the distance between the at least one lamp panel to be compensated and the power supply module according to the row number of the row where each lamp panel to be compensated is located and the column number of the column where each lamp panel to be compensated is located.
3. The method of claim 2, wherein determining the distance between the at least one lamp panel to be compensated and the power module according to a row number of a row and a column number of a column of each lamp panel to be compensated in the at least one lamp panel to be compensated comprises:
acquiring a row number and a column number of a lamp panel closest to the power supply module, and taking the lamp panel as a reference lamp panel;
comparing the difference value between the row number of each lamp panel to be compensated and the row number of the reference lamp panel to obtain a first difference value;
comparing the difference value between the column number of each lamp panel to be compensated and the column number of the reference lamp panel to obtain a second difference value;
and determining the distance between the at least one lamp panel to be compensated and the power supply module according to the first difference value and the second difference value.
4. The method according to claim 1, wherein the operating states of the light-emitting units each include a first operating state and a second operating state, and the adjusting of the operating state of at least one first light-emitting unit and/or the operating state of at least one second light-emitting unit in the light panel to be compensated according to the distance between the light panel to be compensated and the power module comprises:
adjusting part or all of the first light-emitting units in at least one row of first light-emitting units in each lamp panel to be compensated to be in a first working state according to the distance between the at least one lamp panel to be compensated and the power supply module, wherein the rest of the first light-emitting units in each lamp panel to be compensated are in a second working state;
and/or some or all of the second light-emitting units in at least one row of second light-emitting units in each lamp panel to be compensated are in a first working state, and the rest of the second light-emitting units in each lamp panel to be compensated are in a second working state.
5. The method according to claim 4, wherein the at least one lamp panel to be compensated includes a first lamp panel to be compensated and a second lamp panel to be compensated, and the adjusting a part or all of the first light-emitting units in at least one row of the first light-emitting units in each lamp panel to be compensated to be in a first working state according to a distance between the at least one lamp panel to be compensated and the power module includes:
when the distance between the first lamp panel to be compensated and the power module is greater than the distance between the second lamp panel to be compensated and the power module, the number of first light-emitting units in the first working state in the first lamp panel to be compensated is greater than the number of first light-emitting units in the first working state in the second lamp panel to be compensated;
when the distance between the first lamp panel to be compensated and the power module is smaller than the distance between the second lamp panel to be compensated and the power module, the number of the first light-emitting units in the first working state in the first lamp panel to be compensated is smaller than the number of the first light-emitting units in the first working state in the second lamp panel to be compensated.
6. The brightness compensation method for the display panel according to claim 4, wherein the at least one lamp panel to be compensated includes a third lamp panel to be compensated and a fourth lamp panel to be compensated, and adjusting a part or all of the second light-emitting units in at least one row of the second light-emitting units in each lamp panel to be compensated to be in a first working state according to a distance between the at least one lamp panel to be compensated and the power module includes:
when the distance between the third to-be-compensated lamp panel and the power module is greater than the distance between the fourth to-be-compensated lamp panel and the power module, the number of second light-emitting units in the third to-be-compensated lamp panel in the first working state is greater than the number of second light-emitting units in the fourth to-be-compensated lamp panel in the first working state;
when the distance between the third to-be-compensated lamp panel and the power module is smaller than the distance between the fourth to-be-compensated lamp panel and the power module, the number of the second light-emitting units in the first working state in the third to-be-compensated lamp panel is smaller than the number of the second light-emitting units in the first working state in the fourth to-be-compensated lamp panel.
7. The brightness compensation method for the display panel according to claim 4, wherein adjusting the operating state of at least one first light-emitting unit and/or the operating state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power module further comprises:
generating a corresponding driving signal according to the distance between the at least one lamp panel to be compensated and the power supply module;
and adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the driving signal.
8. The method according to claim 7, wherein the driving signal includes a plurality of pulses, each pulse is used to adjust a corresponding light-emitting unit to be in a first working state, and the generating of the corresponding driving signal according to the distance between the at least one lamp panel to be compensated and the power module includes:
calculating the number of the light-emitting units in the first working state in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power supply module;
and randomly generating corresponding driving signals based on the number of the light-emitting units in the first working state in each lamp panel to be compensated, wherein the pulse number of the driving signals is the same as the number of the light-emitting units in the first working state in the corresponding lamp panel to be compensated.
9. The method according to claim 7, wherein adjusting the operating state of at least one first light-emitting unit and/or the operating state of at least one second light-emitting unit in each of the lamp panels to be compensated according to the driving signal comprises:
randomly inputting the driving signals to each lamp panel to be compensated;
and adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated by using the randomly input driving signal.
10. A brightness compensation device is characterized in that the display panel comprises a power supply module, a control module and a plurality of lamp panels arranged in a row and column manner, wherein,
the power supply module is electrically connected with the lamp panels respectively and is used for providing power supply for the lamp panels;
the control module is electrically connected with the lamp panels respectively and is used for executing the brightness compensation method;
each lamp panel comprises at least one row of first light-emitting units and at least one row of second light-emitting units;
the brightness compensation device includes:
the distance acquisition module is used for acquiring the distance between at least one lamp panel to be compensated and the power supply module;
and the adjusting module is electrically connected with the distance acquiring module and is used for adjusting the working state of at least one first light-emitting unit and/or the working state of at least one second light-emitting unit in each lamp panel to be compensated according to the distance between the at least one lamp panel to be compensated and the power supply module so as to compensate the brightness of the display panel.
CN202210286303.9A 2022-03-22 2022-03-22 Brightness compensation method and brightness compensation device for display panel Active CN114664265B (en)

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JPS62219749A (en) * 1986-03-19 1987-09-28 Panafacom Ltd Image input device
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