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CN114038441A - Display brightness adjusting method, display device, adjusting system and storage medium - Google Patents

Display brightness adjusting method, display device, adjusting system and storage medium Download PDF

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Publication number
CN114038441A
CN114038441A CN202111473473.XA CN202111473473A CN114038441A CN 114038441 A CN114038441 A CN 114038441A CN 202111473473 A CN202111473473 A CN 202111473473A CN 114038441 A CN114038441 A CN 114038441A
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brightness
display area
adjusting
display
preset range
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CN202111473473.XA
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CN114038441B (en
Inventor
刘廉慧
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Shenzhen TCL New Technology Co Ltd
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Shenzhen TCL New 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
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

The application provides a display brightness adjusting method, a display device, an adjusting system and a storage medium, wherein the display brightness adjusting method is applied to the display device and comprises the following steps: controlling a display device to display a full white picture image; dividing a display device into a plurality of display areas, and acquiring initial brightness corresponding to each display area; determining a brightness adjusting coefficient of each display area according to the initial brightness and the target brightness of each display area; if the brightness adjusting coefficient is smaller than the minimum value of the preset range, adjusting a first parameter of the display area so that the adjusted brightness adjusting coefficient of the display area is in the preset range; and if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting a second parameter of the display area so as to enable the brightness adjusting coefficient of the adjusted display area to be within the preset range, wherein the first parameter is different from the second parameter. The embodiment of the application solves the problem of uneven backlight brightness.

Description

Display brightness adjusting method, display device, adjusting system and storage medium
Technical Field
The present disclosure relates to the field of display device technologies, and in particular, to a method, a display device, a system and a storage medium for adjusting display brightness.
Background
With the popularization of the multi-partition backlight technology, the driving chip with small current is gradually and widely used, however, at present, the whole display device is thinner and thinner, and the backlight LED lamp is closer to the liquid crystal glass, so that the non-uniformity of the backlight brightness is more and more serious.
Disclosure of Invention
The embodiment of the application provides a display brightness adjusting method, a display device, an adjusting system and a storage medium, and solves the problem of uneven backlight brightness in the prior art.
The embodiment of the application provides a method for adjusting display brightness, which is applied to a display device and comprises the following steps:
controlling the display device to display a full white picture image;
dividing the display device into a plurality of display areas, and acquiring initial brightness corresponding to each display area;
determining a brightness adjusting coefficient of each display area according to the initial brightness and the target brightness of each display area;
if the brightness adjusting coefficient is smaller than the minimum value of a preset range, adjusting a first parameter of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be within the preset range;
and if the brightness adjusting coefficient is larger than the maximum value of a preset range, adjusting a second parameter of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be within the preset range, wherein the first parameter is different from the second parameter.
Optionally, if the brightness adjustment coefficient is smaller than the minimum value of a preset range, adjusting a first parameter of the display area so that the adjusted brightness adjustment coefficient of the display area is within the preset range; if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting a second parameter of the display area, including:
if the brightness adjusting coefficient is smaller than the minimum value of a preset range, adjusting the current for driving the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be within the preset range;
and if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting the duty ratio of the PWM signal for driving the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range.
Optionally, if the brightness adjustment coefficient is smaller than the minimum value of a preset range, adjusting a first parameter of the display area so that the adjusted brightness adjustment coefficient of the display area is within the preset range; if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting a second parameter of the display area, including:
if the brightness adjusting coefficient is smaller than the minimum value of a preset range, adjusting the duty ratio of a PWM signal for driving the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range;
and if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting the current of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range.
Optionally, the adjusting the current of the display area includes:
acquiring initial current currently driving the display area;
and dividing the initial current and the brightness adjusting coefficient to obtain an adjusting current for driving the display area.
Optionally, the adjusting the duty ratio of the display area includes:
acquiring an initial duty ratio of a PWM signal currently driving the display area;
and dividing the initial duty ratio and the brightness adjusting coefficient to obtain an adjusting duty ratio of a PWM signal for driving the display area.
Optionally, a ratio of the initial brightness of the display area to the target brightness is used as the brightness adjustment coefficient.
Optionally, the target brightness is determined by:
taking preset brightness prestored in the display device as the target brightness; or
Taking an average luminance calculated based on the initial luminance of each of the display regions as the target luminance; or
And taking the brightness of one of the display areas in the brightness of each display area as the target brightness.
An embodiment of the present application further provides a display device, where the display device includes:
a display panel for displaying a full white picture image, the display panel including a plurality of display regions;
the brightness acquiring unit is used for acquiring initial brightness corresponding to the full white picture image in each display area;
the processor is used for determining the brightness adjusting coefficient of each display area according to the initial brightness and the target brightness of each display area; if the brightness adjusting coefficient of the display area is smaller than the minimum value of a preset range, adjusting a first parameter of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range; if the brightness adjusting coefficient of the display area is larger than the maximum value of a preset range, adjusting a second parameter of the display area so that the adjusted brightness adjusting coefficient of the display area is within the preset range, wherein the first parameter is different from the second parameter.
An embodiment of the present application further provides a system for adjusting display brightness, where the system for adjusting display brightness includes:
the brightness testing device is used for acquiring the brightness corresponding to each display area;
according to the display device, the display device is electrically connected with the brightness testing device, and the display device obtains the brightness obtained by the brightness testing device through the brightness obtaining unit.
The embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for adjusting display brightness according to any one of the above descriptions.
The beneficial effect of this application lies in: the embodiment of the application provides a method for adjusting display brightness, which comprises the steps of controlling a display panel to display a full white picture image, dividing the display panel into a plurality of display areas, obtaining initial brightness corresponding to the full white picture image in each display area, determining a brightness adjusting coefficient according to the initial brightness and target brightness, and determining to adjust a first parameter or a second parameter of each display area according to the adjusting coefficient, so that the adjusted brightness adjusting coefficient of each display area is within a preset range, further the backlight brightness is homogenized, and the problem that the backlight brightness of an existing display device is uneven is solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the application, and that other drawings can be derived from these drawings by a person skilled in the art without inventive effort.
For a more complete understanding of the present application and its advantages, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts in the following description.
Fig. 1 is a first flowchart illustrating a method for adjusting display brightness according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart illustrating a first display area adjustment method in the adjustment method shown in FIG. 1; FIG. 3 is a schematic flow chart illustrating a second display area adjustment method in the adjustment method shown in FIG. 1; fig. 4 is a schematic flowchart of a method for adjusting current display brightness in an adjusting method according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a display device according to 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 is to be understood that the embodiments described are only a few embodiments of the present application and not all 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.
Taking a direct type LED (Light Emitting Diode) backlight module as an example, in the prior art, the direct type backlight module includes a back plate, a Light source, a Light guide plate and an optical film, and the Light source of the direct type LED backlight module is an LED. The LEDs are arranged on the back plate at intervals to form an LED matrix, and when the LEDs emit light, the LEDs are equivalent to a point light source, and the light rays of the LEDs need to be mixed at a sufficient distance to uniformly emit the light. However, since the conventional lcd devices are required to be thinner, the distance between the light source and the light emitting end in the backlight module is relatively reduced to achieve the overall thinner and lighter lcd device. For the direct type display device, because each LED is a point light source, the light emitted by the LED is mixed sufficiently to achieve the effect of uniform light, and the light and thin arrangement mode can cause uneven brightness of the display device due to insufficient light mixing distance, so that the display panel appears: the corresponding LED is brighter and the corresponding LED is darker at the interval position.
As described above, the overall display effect of the liquid crystal display device is seriously affected, and the user experience is reduced.
Therefore, in order to solve the above problems, the present application proposes a display luminance adjustment method, a display apparatus, an adjustment system, and a storage medium. The present application will be further described with reference to the accompanying drawings and embodiments.
Referring to fig. 1, fig. 1 is a first flowchart illustrating a method for adjusting display brightness according to an embodiment of the present disclosure. The embodiment of the application provides a method for adjusting display brightness, which is applied to a display device, wherein the display device comprises a display panel, and the specific adjusting method comprises the following steps:
101. and controlling the display panel to display the full white picture image.
The display panel comprises a plurality of lamp panels, and each lamp panel adjusts the backlight brightness of the lamp panel through a separate control signal. In the initial state, the main chip inputs signals to each lamp panel to light up the display panel. The main chip inputs a full white picture to the display panel to control the display panel to display the full white picture.
It is understood that, in the initial state, there is a case where the brightness of the full white picture image on the display panel is not uniform.
It should be noted that, in some embodiments, the input signal is a current signal, a driving voltage, or a duty ratio of a PWM control signal for controlling the lighting of each lamp panel. The duty ratio of the PWM control signal is a mapping ratio, B is an average brightness value of the HDR image frame, M is a current amplitude value of the PWM control signal, and the duty ratio is a ratio of an image frame gray-scale mean value to a maximum gray-scale value.
102. The display panel is divided into a plurality of display areas, and initial brightness corresponding to each display area is obtained.
The display panel is divided into a plurality of display areas, and the full white picture image is correspondingly divided so as to respectively obtain the initial brightness of the full white picture image corresponding to each display area.
Illustratively, the display panel is divided into five display regions, for example, a1, a2, A3, a4 and a5, and then the initial luminance B1 corresponding to the full white image in the a1 region, the initial luminance B2 corresponding to the full white image in the a2 region, the initial luminance B3 corresponding to the full white image in the A3 region, the initial luminance B4 corresponding to the full white image in the a4 region, and the initial luminance B5 corresponding to the full white image in the a5 region are obtained.
In some embodiments, after the display panel is divided into a plurality of display areas, each display area of the display panel is sequentially lighted up to obtain an initial brightness corresponding to the full white picture image in each display area. Illustratively, five display regions a1, a2, A3, a4 and a5 of the display panel are sequentially lighted, and initial luminances B1, B2, B3, B4 and B5 of the full white picture image corresponding to the display regions a1, a2, A3, a4 and a5 are sequentially acquired.
It should be noted that, in the embodiments of the present application, the division of the display panel into five display regions is taken as an example for explanation, and should not be construed as a limitation on the division of the display panel, and the specific division should be analyzed according to the actual situation, and is not specifically limited herein.
103. And determining the brightness adjusting coefficient of each display area according to the initial brightness and the target brightness of each display area.
And determining the brightness adjusting coefficient of each display area according to the initial brightness and the target brightness of each display area. The brightness adjusting coefficient is the ratio of the initial brightness of the display area to the target brightness.
The target brightness can be determined in the following manner, it should be noted that the selection of the target brightness is not limited to the following manners, and the specific selection and design of the target brightness can be set according to practical situations, and is not limited specifically herein.
For example, in some embodiments, a preset brightness pre-stored in the display device is used as the target brightness. For example, a preset brightness is set according to the size and dimension of the display screen or the brightness requirement of the display screen itself, and the preset brightness is set as the target brightness, so that the brightness of the whole display screen is adjusted to be a uniform preset brightness.
In some embodiments, the target luminance is an average luminance calculated based on the initial luminance of each display region. For example, the average luminance B is obtained by averaging the initial luminances B1, B2, B3, B4, and B5 corresponding to the display regions a1, a2, A3, a4, and a 5.
In some other embodiments, the brightness of one of the display regions is taken as the target brightness. For example, the luminance of any one of the initial luminances B1, B2, B3, B4, and B5 corresponding to the display regions a1, a2, A3, a4, and a5 is taken as the target luminance.
The present embodiment is described by taking the target luminance as the average luminance as an example, and should not be construed as limiting the target luminance. Specifically, the initial brightness of each display area is divided by the average brightness to obtain the brightness adjustment coefficient of each display area. For example, the luminance adjustment coefficient corresponding to the a1 region is obtained as F1 ═ B1/B, the luminance adjustment coefficient corresponding to the a2 region is obtained as F2 ═ B2/B, the luminance adjustment coefficient corresponding to the A3 region is obtained as F3 ═ B3/B, the luminance adjustment coefficient corresponding to the a4 region is obtained as F4 ═ B4/B, and the luminance adjustment coefficient corresponding to the a5 region is obtained as F5 ═ B5/B. That is, the display regions a1, a2, A3, a4 and a5 correspond to luminance adjustment coefficients F1, F2, F3, F4 and F5.
104. And if the brightness adjusting coefficient is smaller than the minimum value of the preset range, adjusting the first parameter of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range.
And comparing the brightness adjusting coefficient of each display area with a preset range respectively, wherein the preset range is between a first preset value and a second preset value, the second preset value is larger than the first preset value, namely the first preset value is the minimum value of the preset range, and the second preset value is the maximum value of the preset range. It should be noted that the preset range is designed according to actual situations, for example, the preset range is defined according to different sizes, sizes and brightness.
The brightness adjustment coefficients F1, F2, F3, F4, and F5 corresponding to the display areas a1, a2, A3, a4, and a5 are compared with a preset range.
If any one of the luminance adjustment coefficients F1, F2, F3, F4, and F5 is within the preset range, the display area whose luminance adjustment coefficient is within the preset range does not need to be adjusted.
If any one of the brightness adjustment coefficients F1, F2, F3, F4 and F5 is not in the preset range, the display area of which the brightness adjustment coefficient is not in the preset range is further judged. And if the brightness adjusting coefficient is smaller than the first preset value, adjusting the first parameter of the display area.
For example, if the brightness adjustment coefficient F1 corresponding to the a1 area is not within the preset range and the brightness adjustment coefficient F1 is smaller than the first preset value, the first parameter of the display area is adjusted so that the adjusted brightness adjustment coefficient of the display area is within the preset range.
105. And if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting a second parameter of the display area so as to enable the brightness adjusting coefficient of the adjusted display area to be within the preset range, wherein the first parameter is different from the second parameter.
For example, if the brightness adjustment coefficient F1 corresponding to the a1 area is not within the preset range and the brightness adjustment coefficient F1 is greater than the second preset value, the second parameter of the display area is adjusted so that the adjusted brightness adjustment coefficient of the display area is within the preset range. Wherein the first parameter is different from the second parameter.
Referring to fig. 2, fig. 2 is a schematic flow chart illustrating a first display area adjustment method in the adjustment method shown in fig. 1. The present embodiment takes the brightness adjustment coefficient F1 corresponding to the a1 area as an example for the judgment, but should not be construed as limiting the other areas of the display area.
201. And judging that the brightness adjusting coefficient corresponding to the display area is not in a preset range.
And sequentially and respectively judging whether the F1, the F2, the F3, the F4 and the F5 in the brightness adjusting coefficient are within a preset range, and if the brightness adjusting coefficient is within the range, stopping the adjustment. If the brightness adjustment coefficient F1 corresponding to the area A1 is not within the preset range, the judgment is continued.
202. And if the brightness adjusting coefficient is smaller than the minimum value of the preset range, adjusting the current for driving the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be within the preset range.
If the brightness adjustment coefficient F1 corresponding to the area A1 is smaller than the first preset value, the current for driving the display area of the area A1 is adjusted. For example, if the preset range is a to b and F1 < a, the current for driving the display area in the a1 area is adjusted so that the brightness adjustment coefficient of the display area after adjustment is within the preset range.
203. And if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting the duty ratio of the PWM signal for driving the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range.
If the brightness adjusting coefficient F1 corresponding to the area A1 is greater than the second preset value, the duty ratio of the PWM signal for driving the display area A1 is adjusted. For example, if the preset range is a to b and F1 > b, the duty ratio of the PWM signal for driving the display area of the a1 area is adjusted so that the brightness adjustment coefficient of the display area after adjustment is within the preset range.
In other embodiments, when the brightness adjustment coefficient corresponding to the display area is not within the preset range, please refer to fig. 3, in which fig. 3 is a schematic flow chart of a second display area adjustment method in the adjustment method shown in fig. 1.
301. And judging whether the brightness adjusting coefficient corresponding to the display area is in a preset range.
And sequentially and respectively judging whether the F1, the F2, the F3, the F4 and the F5 in the brightness adjusting coefficient are within a preset range, and if the brightness adjusting coefficient is within the range, stopping the adjustment. If the brightness adjustment coefficient F1 corresponding to the area A1 of the full white picture image is not within the preset range, the judgment is continued.
302. And if the brightness adjusting coefficient is smaller than the minimum value of the preset range, adjusting the duty ratio of the PWM signal for driving the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range.
If the brightness adjustment coefficient F1 corresponding to the area A1 is smaller than a first preset value, the duty ratio of the PWM signal for driving the display area of the area A1 is adjusted, so that the adjusted brightness adjustment coefficient of the display area is within a preset range. For example, if the preset range is a to b and F1 < a, the duty ratio of the PWM signal for driving the display region of the a1 region is adjusted.
303. And if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting the current of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range.
If the brightness adjustment coefficient F1 corresponding to the area A1 is greater than the second preset value, the current for driving the display area of the area A1 is adjusted. For example, if the predetermined range is a to b and F1 > b, the current for driving the display region of the a1 region is adjusted.
It can be understood that, when the brightness adjustment coefficient corresponding to the display area is not within the preset range, the first parameter or the second parameter of the display area may be adjusted, and may be designed according to actual situations, which is not specifically limited herein.
The adjusting of the current for driving the display region includes: and acquiring the initial current of the current driving display area, and dividing the initial current by the brightness adjusting coefficient to obtain the adjusting current of the driving display area.
Adjusting the duty ratio of the PWM signal driving the display area includes: and acquiring an initial duty ratio of the PWM signal for driving the current display area, and dividing the initial duty ratio and the brightness adjusting coefficient to obtain an adjusting duty ratio of the PWM signal for driving the display area.
And sequentially adjusting the display areas of which the brightness adjusting coefficients corresponding to the display areas are not in the preset range until the brightness adjusting coefficients of all the display areas are in the preset range.
In some embodiments, fig. 4 is a schematic flowchart of an adjusting method for current display brightness in an adjusting method provided in an embodiment of the present application. After the display area is adjusted, the brightness of the current full white picture image is detected again, so that the accuracy of the display brightness adjusting method is improved, and errors are reduced. The specific method comprises the following steps:
401. and acquiring the current brightness of the full white picture image corresponding to each display area.
The method comprises the steps of obtaining the current brightness C1 corresponding to a full white picture image in an A1 area, obtaining the current brightness C2 corresponding to a full white picture image in an A2 area, obtaining the current brightness C3 corresponding to a full white picture image in an A3 area, obtaining the current brightness C4 corresponding to a full white picture image in an A4 area, and obtaining the current brightness C5 corresponding to a full white picture image in an A5 area.
402. And determining the current brightness adjusting coefficient of each display area according to the current brightness and the target brightness of each display area.
The current luminance adjustment coefficients F11, F22, F33, F44, and F55 of the respective display regions are determined by dividing the target luminance by the current luminances C1, C2, C3, C4, and C5 corresponding to the display regions a1, a2, A3, a4, and a5, respectively.
403. And comparing the brightness adjusting coefficient of each current display area with a preset range, and judging whether the first parameter or the second parameter of the display area needs to be adjusted.
And comparing the current brightness adjustment coefficients F11, F22, F33, F44 and F55 corresponding to the display areas A1, A2, A3, A4 and A5 with a preset range, and judging whether the first parameter or the second parameter of the display areas needs to be adjusted. The specific comparison method is shown in step 104, and will not be described in detail herein.
According to the method for adjusting the display brightness, the full white picture image of the display panel and the initial brightness of the full white picture image in each display area are obtained, the brightness adjusting coefficient is determined according to the initial brightness and the target brightness, and the first parameter or the second parameter of the display area is determined to be adjusted according to the adjusting coefficient, so that the brightness of each display area reaches the target brightness, the backlight brightness is further homogenized, and the problem that the backlight brightness of an existing display device is uneven is solved.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. The embodiment of the application provides a display device 100, and the display device 100 comprises a display panel 10, an acquisition brightness unit 20 and a processor 30.
The display panel 10 includes a backlight source, the backlight source includes a plurality of backlight regions, each backlight region includes at least one light source, the display panel 10 is configured to display a full white image, and the display panel 10 includes a plurality of display regions.
And the acquiring brightness unit 20 is used for acquiring the initial brightness of the full white picture image corresponding to each display area.
A processor 30 for determining a brightness adjustment coefficient of each display area according to the initial brightness and the target brightness of each display area; if the brightness adjusting coefficient of the display area is smaller than the minimum value of the preset range, adjusting a first parameter of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be within the preset range; and if the brightness adjusting coefficient of the display area is larger than the maximum value of the preset range, adjusting a second parameter of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be within the preset range, wherein the first parameter is different from the second parameter.
The display device 100 further includes an adjusting unit, and in some embodiments, when the brightness adjusting coefficient is smaller than the first preset value, the adjusting unit adjusts the current of the display area. And when the brightness adjusting coefficient is larger than a second preset value, the adjusting unit adjusts the duty ratio of the display area. In some other embodiments, if the brightness adjustment coefficient is smaller than the first preset value, the adjustment unit adjusts the duty ratio of the display area. If the brightness adjusting coefficient is larger than the second preset value, the adjusting unit adjusts the current of the display area.
An embodiment of the present application further provides a system for adjusting display brightness, where the system includes any one of the display devices 100 described above, and specific details are described above and are not repeated herein. The adjusting system further includes a brightness testing device electrically connected to the display device 100, and the brightness testing device is configured to obtain the brightness corresponding to each display area and send the brightness to the brightness obtaining unit 20.
The embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when executed by the processor 30, the computer program implements the steps of the method for adjusting display brightness according to any one of the above methods, such as: lighting up the display panel 10 and dividing the display panel 10 into a plurality of display areas; acquiring a full white picture image of the display panel 10, and acquiring initial brightness corresponding to the full white picture image in each display area; determining a brightness adjusting coefficient of each display area according to the initial brightness and the target brightness of each full white picture image; respectively comparing the brightness adjusting coefficient of each display area with a preset range, wherein the preset range is between a first preset value and a second preset value, the second preset value is larger than the first preset value, and if the brightness adjusting coefficient is smaller than the first preset value, adjusting a first parameter of the display area; and if the brightness adjusting coefficient is larger than a second preset value, adjusting a second parameter of the display area, wherein the first parameter is different from the second parameter, so that the brightness of each display area reaches the target brightness.
In the embodiment of the present application, the storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a Random Access Memory (RAM), or the like.
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 foregoing describes in detail a method, a display apparatus, a system and a storage medium for adjusting display brightness according to embodiments of the present application. The principles and embodiments of the present application have been described herein using specific guidelines, the above examples being provided only to aid in the understanding of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. A method for adjusting display brightness is applied to a display device, and is characterized in that the method comprises the following steps:
controlling the display device to display a full white picture image;
dividing the display device into a plurality of display areas, and acquiring initial brightness corresponding to each display area;
determining a brightness adjusting coefficient of each display area according to the initial brightness and the target brightness of each display area;
if the brightness adjusting coefficient is smaller than the minimum value of a preset range, adjusting a first parameter of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be within the preset range;
and if the brightness adjusting coefficient is larger than the maximum value of a preset range, adjusting a second parameter of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be within the preset range, wherein the first parameter is different from the second parameter.
2. The adjusting method according to claim 1, wherein if the brightness adjustment coefficient is smaller than a minimum value of a preset range, the first parameter of the display area is adjusted so that the adjusted brightness adjustment coefficient of the display area is within the preset range; if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting a second parameter of the display area, including:
if the brightness adjusting coefficient is smaller than the minimum value of a preset range, adjusting the current for driving the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be within the preset range;
and if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting the duty ratio of the PWM signal for driving the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range.
3. The adjusting method according to claim 1, wherein if the brightness adjustment coefficient is smaller than a minimum value of a preset range, the first parameter of the display area is adjusted so that the adjusted brightness adjustment coefficient of the display area is within the preset range; if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting a second parameter of the display area, including:
if the brightness adjusting coefficient is smaller than the minimum value of a preset range, adjusting the duty ratio of a PWM signal for driving the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range;
and if the brightness adjusting coefficient is larger than the maximum value of the preset range, adjusting the current of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range.
4. The adjusting method according to claim 2 or 3, wherein the adjusting of the current for driving the display area comprises:
acquiring initial current currently driving the display area;
and dividing the initial current and the brightness adjusting coefficient to obtain an adjusting current for driving the display area.
5. The adjusting method according to claim 2 or 3, wherein the adjusting the duty ratio of the PWM signal driving the display area comprises:
acquiring an initial duty ratio of a PWM signal currently driving the display area;
and dividing the initial duty ratio and the brightness adjusting coefficient to obtain an adjusting duty ratio of a PWM signal for driving the display area.
6. The adjustment method according to claim 1, characterized in that a ratio of an initial luminance of the display region to the target luminance is used as the luminance adjustment coefficient.
7. The adjustment method according to claim 1, characterized in that the target brightness is determined by:
taking preset brightness prestored in the display device as the target brightness; or
Taking an average luminance calculated based on the initial luminance of each of the display regions as the target luminance; or
And taking the brightness of one of the display areas in the brightness of each display area as the target brightness.
8. A display device, characterized in that the display device comprises:
a display panel for displaying a full white picture image, the display panel including a plurality of display regions;
the brightness acquiring unit is used for acquiring initial brightness corresponding to the full white picture image in each display area;
the processor is used for determining the brightness adjusting coefficient of each display area according to the initial brightness and the target brightness of each display area; if the brightness adjusting coefficient of the display area is smaller than the minimum value of a preset range, adjusting a first parameter of the display area so as to enable the adjusted brightness adjusting coefficient of the display area to be in the preset range; if the brightness adjusting coefficient of the display area is larger than the maximum value of a preset range, adjusting a second parameter of the display area so that the adjusted brightness adjusting coefficient of the display area is within the preset range, wherein the first parameter is different from the second parameter.
9. A system for adjusting display brightness, the system comprising:
the brightness testing device is used for acquiring the brightness corresponding to each display area;
the display device according to claim 8, wherein the display device is electrically connected to the test luminance device, and the display device acquires the luminance obtained by the test luminance device through the luminance acquisition unit.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for adjusting display brightness according to any one of claims 1 to 7.
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