CN110767162A - Display compensation method and device, computer readable storage medium and computer equipment - Google Patents

Display compensation method and device, computer readable storage medium and computer equipment Download PDF

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Publication number
CN110767162A
CN110767162A CN201911086556.6A CN201911086556A CN110767162A CN 110767162 A CN110767162 A CN 110767162A CN 201911086556 A CN201911086556 A CN 201911086556A CN 110767162 A CN110767162 A CN 110767162A
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target
sub
display data
pixel
gray scale
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CN110767162B (en
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朱明毅
林奕呈
王俪蓉
陈燚
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BOE Technology Group Co Ltd
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BOE Technology Group 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
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display panels
    • 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
    • G09G2340/00—Aspects of display data processing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Abstract

The invention discloses a display compensation method and device, a computer readable storage medium and computer equipment, which can be applied to compensation of a display panel aged by a light-emitting device. In the current compensation stage, the current brightness sensing value of the current environment when the display panel does not emit light is firstly obtained, the current frame data to be displayed is obtained, then the target display data corresponding to the target gray scale is determined according to the current frame data to be displayed and the predetermined target gray scale, then the sub-pixels corresponding to the target display data are controlled to emit light by adopting the target display data to obtain the target brightness sensing value corresponding to the sub-pixels emitting light, and finally the target display data corresponding to the corresponding sub-pixels can be compensated according to the current brightness sensing value of the current environment, the target brightness sensing value, the pre-stored initial optical brightness value and the predetermined gray scale compensation lookup table, so that the real-time compensation of the display panel can be realized.

Description

Display compensation method and device, computer readable storage medium and computer equipment
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display compensation method and apparatus, a computer-readable storage medium, and a computer device.
Background
Organic Light Emitting Diodes (OLEDs) have self-Emitting characteristics, and have advantages of high contrast, thin thickness, wide viewing angle, fast response speed, flexibility, simple structure and process, etc. when applied to a display panel, they are receiving much attention. However, the OLED may be gradually degraded with time, thereby affecting the display effect. Therefore, how to compensate for the OLED is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a display compensation method of a display panel, which can compensate the display panel and improve the uniformity of the display panel.
Therefore, an embodiment of the present invention provides a display compensation method for a display panel, including:
in the current compensation stage, acquiring a current brightness sensing value of the current environment when the display panel does not emit light, and acquiring current frame data to be displayed; the current frame data to be displayed comprises display data corresponding to each sub-pixel;
determining target display data corresponding to the target gray scale according to the current frame data to be displayed and the predetermined target gray scale;
controlling the sub-pixels corresponding to the target display data to emit light by adopting the target display data, and acquiring a target brightness sensing value corresponding to the luminous sub-pixels;
and compensating the target display data correspondingly input by the corresponding sub-pixel according to the current brightness sensing value of the current environment, the target brightness sensing value and a pre-stored initial optical brightness value and gray scale compensation lookup table.
Further, the compensating the target display data correspondingly input to the corresponding sub-pixel according to the current brightness sensing value of the current environment, the target brightness sensing value, a pre-stored initial optical brightness value and a preset gray scale compensation lookup table specifically includes:
determining an actual optical brightness value according to the current brightness sensing value and the target brightness sensing value;
judging whether the difference value between the actual optical brightness value and the pre-stored initial optical brightness value meets a threshold range or not;
if the difference value does not meet the threshold range, determining a compensation parameter corresponding to the actual optical brightness value according to the actual optical brightness value and a preset gray scale compensation lookup table; wherein the gray scale compensation look-up table comprises: a plurality of actual optical brightness values and compensation parameters corresponding to the actual optical brightness values one to one;
and determining new display data according to the determined compensation parameters and the corresponding target display data.
Further, the determining new display data specifically includes:
and multiplying the determined compensation parameters by the corresponding target display data to obtain new display data.
Further, dividing the sub-pixels of the display panel into a plurality of sub-pixel regions;
determining target display data corresponding to the target gray scale according to the current frame data to be displayed and a predetermined target gray scale, specifically comprising:
determining display data corresponding to each sub-pixel area according to the current frame data to be displayed;
judging whether display data corresponding to the target gray scale exists in the display data corresponding to each sub-pixel area;
and if so, taking the display data corresponding to the target gray scale in the display data corresponding to the sub-pixel area as the target display data.
Further, if not, selecting at least one sub-pixel in the sub-pixel area, replacing the display data corresponding to the selected sub-pixel with the display data corresponding to the closest target gray scale, and taking the replaced display data as the target display data corresponding to the selected sub-pixel; and the gray scale corresponding to the display data of the selected sub-pixel is close to the target gray scale.
Further, the sub-pixel corresponding to the target display data is a target sub-pixel; after the obtaining of the target brightness sensing value corresponding to the sub-pixel emitting light, the method further includes:
marking the target sub-pixel, and in the next compensation stage, not selecting the display data corresponding to the target sub-pixel as target display data;
and when the ratio of the number of the marked target sub-pixels to the number of all sub-pixels in the sub-pixel area in the same sub-pixel area is larger than a preset ratio, clearing the mark of the target sub-pixel corresponding to the sub-pixel area.
Correspondingly, an embodiment of the present invention further provides a display compensation apparatus for a display panel, including:
the acquisition unit is used for acquiring a current brightness sensing value of the current environment when the display panel does not emit light and acquiring current frame data to be displayed; the current frame data to be displayed comprises display data corresponding to each sub-pixel;
the determining unit is used for determining target display data corresponding to the target gray scale according to the current frame data to be displayed and the predetermined target gray scale;
the sensing unit is used for controlling the sub-pixels corresponding to the target display data to emit light by adopting the target display data and acquiring target brightness sensing values corresponding to the luminous sub-pixels;
and the processing unit is used for compensating the target display data correspondingly input by the corresponding sub-pixel according to the current brightness sensing value of the current environment, the target brightness sensing value, and a pre-stored initial optical brightness value and gray scale compensation lookup table.
Correspondingly, an embodiment of the present invention further provides a display device, including: the embodiment of the invention provides the display control device.
Accordingly, embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the above-mentioned display compensation method provided by embodiments of the present invention.
Accordingly, an embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the display compensation method provided in the embodiment of the present invention are implemented.
The invention has the following beneficial effects:
the display compensation method provided by the embodiment of the invention can be applied to compensation of the display panel aged by the light-emitting device. In the current compensation stage, the current brightness sensing value of the current environment when the display panel does not emit light is firstly obtained, the current frame data to be displayed is obtained, then the target display data corresponding to the target gray scale is determined according to the current frame data to be displayed and the predetermined target gray scale, then the sub-pixels corresponding to the target display data are controlled to emit light by adopting the target display data to obtain the target brightness sensing value corresponding to the sub-pixels emitting light, and finally the target display data corresponding to the corresponding sub-pixels can be compensated according to the current brightness sensing value of the current environment, the target brightness sensing value, the pre-stored initial optical brightness value and the predetermined gray scale compensation lookup table, so that the real-time compensation of the display panel can be realized.
Drawings
Fig. 1 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
FIG. 2a is a flowchart illustrating a display compensation method of a display panel according to an embodiment of the present invention;
FIG. 2b is a flowchart illustrating a display compensation method for a display panel according to another embodiment of the present invention;
fig. 3 is a schematic view of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a display compensation apparatus of a display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a sensing device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a sub-pixel area A1-1 according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of sub-pixel regions A1-64 according to an embodiment of the present invention;
fig. 8 is a signal timing diagram according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only for illustrating and explaining the present invention and are not to be used for limiting the present invention. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Generally, a display panel includes a plurality of pixel units, each pixel unit includes a plurality of sub-pixels, each sub-pixel includes a light emitting device and a pixel circuit, and the pixel circuit is used for driving the light emitting device to emit light. As shown in fig. 1, the pixel circuit may include: a first switching transistor M1, a second switching transistor M2, a driving transistor DTFT, and a storage capacitor Cst. A first terminal of the first switching transistor M1 is electrically connected to the Data signal terminal Data, a control terminal of the first switching transistor M1 is electrically connected to the Scan signal terminal Scan, and a second terminal of the first switching transistor M1 is electrically connected to the gate of the driving transistor DTFT. A first electrode of the driving transistor DTFT is electrically connected to the first power source terminal VDD, a gate electrode of the driving transistor DTFT is electrically connected to a first terminal of the storage capacitor Cst, and a second electrode of the driving transistor DTFT is electrically connected to a first terminal of the light emitting device L. The second terminal of the storage capacitor Cst is electrically connected to the first terminal of the light emitting device L. A first terminal of the light emitting device L is electrically connected to a first terminal of the second switching transistor M2, and a second terminal of the light emitting device L is electrically connected to a second power source terminal VSS. A control terminal of the second switching transistor M2 is electrically connected to the Scan signal terminal Scan, and a second terminal of the second switching transistor M2 is electrically connected to the transistor characteristic compensation terminal Vsus.
In a specific implementation, the light emitting device may be: at least one of organic Light Emitting Diodes and quantum dot Light Emitting Diodes (QLEDs). For example, when the light emitting device L is an OLED, the anode of the OLED is a first end of the light emitting device L, and the cathode of the OLED is a second end of the light emitting device L.
An embodiment of the present invention provides a display compensation method for a display panel, as shown in fig. 2a, the method may include the following steps:
s101, in a current compensation stage, acquiring a current brightness sensing value of a current environment when a display panel does not emit light, and acquiring current frame data to be displayed; the current frame data to be displayed comprises display data corresponding to each sub-pixel.
S102, determining target display data corresponding to a target gray scale according to the current frame data to be displayed and the predetermined target gray scale.
S103, controlling the sub-pixels corresponding to the target display data to emit light by adopting the target display data, and acquiring a target brightness sensing value corresponding to the sub-pixels emitting light.
And S104, compensating the target display data correspondingly input by the corresponding sub-pixel according to the current brightness sensing value and the target brightness sensing value of the current environment and a pre-stored initial optical brightness value and gray scale compensation lookup table.
The display compensation method provided by the embodiment of the invention can be applied to compensation of the display panel aged by the light-emitting device. In the current compensation stage, the current brightness sensing value of the current environment when the display panel does not emit light is firstly obtained, the current frame data to be displayed is obtained, and then the target display data corresponding to the target gray scale is determined according to the current frame data to be displayed and the predetermined target gray scale. And then controlling the sub-pixels corresponding to the target display data to emit light by adopting the target display data so as to obtain a target brightness sensing value corresponding to the luminous sub-pixels. And then, compensating the target display data corresponding to the corresponding sub-pixels according to the current brightness sensing value, the target brightness sensing value, the pre-stored initial optical brightness value and a preset gray scale compensation lookup table of the current environment, so as to realize real-time compensation of the display panel.
In specific implementation, the display compensation method provided by the embodiment of the invention can be adopted for each frame to be displayed: each frame to be displayed corresponds to a compensation phase, i.e. before each frame to be displayed is displayed, the above steps S101-S104 are performed.
The gray scale is generally divided into several parts of the brightness variation between the darkest and the brightest so as to control the brightness of the screen. The displayed image is generally composed of a plurality of pixels, each pixel is generally composed of three sub-pixels of red, green and blue, and can present a plurality of different colors, and the light source of each sub-pixel can present different brightness levels. Gray levels are the gradation levels representing the different brightness from the darkest to the brightest. The more the intermediate levels are, the more exquisite the picture effect can be presented. At present, a 6bit panel or an 8bit panel is adopted in a general display panel to realize image display, wherein the 8bit panel can express 256 gray scales; a 6bit panel capable of representing 64 gray levels. In specific implementation, after the target display data input corresponding to the corresponding sub-pixel is compensated, the display is performed according to the compensated display data. Specifically, the compensated display data may be converted into a gray scale voltage for display, and displayed by the gray scale voltage.
When performing display based on the compensated display data, the sub-pixels perform image display based on the compensated display data corresponding to the target gray-scale voltage. When the target luminance sensing value corresponding to the sub-pixel that emits light is acquired, the sub-pixel is also displayed by the target display data corresponding to the target gray scale, and when the target luminance sensing value corresponding to the sub-pixel that emits light is acquired, the sub-pixel is also controlled to emit light, but the display effect of the normal image display is less affected.
Specifically, in implementation, the target gray level may be at least one preset gray level; for example, the target gray level may be a predetermined gray level, two gray levels, or three gray levels, which is not limited herein. In this way, in a compensation stage, only the target display data corresponding to a part of the sub-pixels in the display panel can be compensated by controlling the selected target gray scale, so that the compensation parameters of all the sub-pixels do not need to be acquired, the required calculation amount is small, and the hardware design can be simplified and the power consumption can be reduced.
Of course, in the implementation, at least one gray level can be arbitrarily selected from the gray level range of the display panel as the target gray level. For example, when the display panel has 256 gray levels, 32 gray levels, 64 gray levels, and 128 gray levels can be selected as target gray levels. Of course, the present invention includes, but is not limited to, this.
Certainly, in specific implementation, the target gray scale may also be determined according to the current frame data to be displayed, for example, according to the number of sub-pixels corresponding to each gray scale of the frame data to be displayed, at least one gray scale is selected as the target gray scale; alternatively, the target gray scale may be determined according to the target gray scale in the previous compensation stage, for example, the target gray scale may be the same as the target gray scale in the previous compensation stage; of course, the determination method of the target gray level in the embodiment of the present invention includes, but is not limited to, this.
In specific implementation, the sub-pixels can be indirectly controlled to be compensated by controlling the selected target gray scale, for example, the display panel is 256 gray scales, where 0 gray scale represents the lowest gray scale, i.e., the gray scale when the display panel displays the darkest picture, 255 gray scale represents the highest gray scale, i.e., the gray scale when the display panel displays the whitest picture, and all the gray scales from 0 to 255 are selected as the target gray scales, so that all the sub-pixels in the display panel are compensated.
In specific implementation, as shown in fig. 3, in the embodiment of the present invention, the sub-pixels of the display panel may be divided into a plurality of sub-pixel regions, for example, 64 × 36 sub-pixel regions, and the actual sub-pixel regions may be designed and determined according to actual situations, which is not limited herein. Illustratively, each sub-pixel region may include 36 sub-pixels, and of course, the number of sub-pixels in each sub-pixel region may also be determined according to practical design, and is not limited herein. Thus, the target display data corresponding to the target gray scale can be determined in a partitioned manner. As shown in fig. 2b, the step S102 determines target display data corresponding to a target gray scale according to the current frame data to be displayed and the predetermined target gray scale, and may specifically include the following steps:
and S1021, determining display data corresponding to each sub-pixel area according to the current frame data to be displayed.
S1022, for each sub-pixel region, determine whether the display data corresponding to the sub-pixel region has the display data corresponding to the target gray scale. If yes, go to step S1023; if not, go to step S1024.
And S1023, using the display data corresponding to the target gray scale in the display data corresponding to the sub-pixel area as target display data.
S1024, selecting at least one sub-pixel in the sub-pixel area, replacing display data corresponding to the selected sub-pixel with display data corresponding to the closest target gray scale, and taking the replaced display data as target display data corresponding to the selected sub-pixel; and the gray scale corresponding to the display data of the selected sub-pixel is close to the target gray scale. Therefore, at least one sub-pixel corresponding to the gray scale closest to the target gray scale in the sub-pixel area can be selected according to the target gray scale in the sub-pixel area; or determining a gray scale range value according to the target gray scale, and randomly selecting the sub-pixel regions corresponding to all gray scales in the gray scale range value in the sub-pixel regions; of course, the present invention includes, but is not limited to, this.
In a specific implementation, in the embodiment of the present invention, the compensating the target display data correspondingly input to the corresponding sub-pixel according to the current brightness sensing value, the target brightness sensing value, the pre-stored initial optical brightness value, and the preset gray scale compensation lookup table of the current environment may specifically include:
determining an actual optical brightness value according to the current brightness sensing value and the target brightness sensing value;
judging whether the difference value between the actual optical brightness value and the pre-stored initial optical brightness value meets a threshold range or not;
if the difference value does not meet the threshold range, determining a compensation parameter corresponding to the actual optical brightness value according to the actual optical brightness value and a preset gray scale compensation lookup table; wherein, the gray scale compensation lookup table comprises: a plurality of actual optical brightness values and compensation parameters corresponding to the actual optical brightness values one to one;
and determining new display data according to the determined compensation parameters and the corresponding target display data.
In a specific implementation, the current brightness sensing value is also a brightness sensing value of the current ambient background light, and the actual optical brightness value is a value obtained by eliminating the influence of the current ambient background light on the target brightness sensing value. Specifically, the actual optical brightness value may be a difference value between the target brightness sensing value and the current brightness sensing value, and of course, the present invention includes but is not limited thereto.
In an implementation, the pre-stored initial optical brightness value may be a brightness sensing value corresponding to each sub-pixel obtained when the sub-pixel normally emits light when the light emitting device in the sub-pixel is not aged (for example, when the display panel is manufactured) and the current brightness sensing value of the current ambient background light is negligible; alternatively, the pre-stored initial optical brightness value may also be a preset value, which is not limited herein.
In a specific implementation, the threshold range may be an error tolerance range, and if the difference satisfies the threshold range, it indicates that the light emitting device in the sub-pixel is not aged, or the aging degree is small, and no compensation is needed. Specifically, in practical implementation, the threshold range may be represented by an interval formed by 0 and the extension value Δ, and the formed interval may be, for example: [ 0-. DELTA.0 + DELTA ]. Alternatively, the following may be used: [ 0-. DELTA.0 + DELTA.). Alternatively, (0- Δ, 0+ Δ ]. for example, Δ may be 0.1 or 0.01, and in actual application, Δ may be designed and determined according to the actual application, and is not limited thereto.
In specific implementation, in the embodiment of the present invention, determining new display data may specifically include:
and multiplying the determined compensation parameters by the corresponding target display data to obtain new display data.
Specifically, in the specific implementation, when the actual optical brightness value is smaller than the pre-stored initial optical brightness value D, the determined compensation parameter may be larger than 1, that is, the determined gray scale corresponding to the new display data is larger than the gray scale corresponding to the target display data. When the actual optical brightness value is greater than the pre-stored initial optical brightness value D, the determined compensation parameter may be less than 1, that is, the determined gray scale corresponding to the new display data is less than the gray scale corresponding to the target display data.
In a specific implementation, other mathematical relationships or logical relationships may be used for the determined compensation parameters and the corresponding target display data to determine new display data, for example, the new display data and the determined compensation parameters and the corresponding target display data may satisfy a preset functional relationship. Of course, the present invention includes, but is not limited to, this.
In specific implementation, in the embodiment of the present invention, after step S103, the method may further include: and marking the target sub-pixel, and in the next compensation stage, not selecting the display data corresponding to the target sub-pixel as the target display data. This can reduce the amount of calculation of the compensation.
And when the ratio of the number of the marked target sub-pixels to the number of all the sub-pixels in the sub-pixel area in the same sub-pixel area is larger than a preset ratio, clearing the marks of the target sub-pixels corresponding to the sub-pixel area. Thus, the target display data of the sub-pixel corresponding to the target gray scale can be compensated again.
Based on the same inventive concept, an embodiment of the present invention further provides a display compensation apparatus for a display panel, as shown in fig. 4, which may include:
the acquiring unit 10 is configured to acquire a current brightness sensing value of a current environment when the display panel does not emit light, and acquire current frame data to be displayed; the current frame data to be displayed comprises display data corresponding to each sub-pixel;
the determining unit 20 is configured to determine target display data corresponding to a target gray scale according to current frame data to be displayed and the predetermined target gray scale;
a sensing unit 30, configured to control the sub-pixels corresponding to the target display data to emit light using the target display data, and obtain a target brightness sensing value corresponding to the sub-pixels that emit light;
and the processing unit 40 is configured to compensate the target display data correspondingly input to the corresponding sub-pixel according to the current brightness sensing value and the target brightness sensing value of the current environment and the pre-stored initial optical brightness value and gray scale compensation lookup table.
In a specific implementation, in the embodiment of the present invention, the processing unit 40 may be further configured to mark the target sub-pixel, and in a next compensation stage, no longer select display data corresponding to the target sub-pixel as target display data; and when the ratio of the number of the marked target sub-pixels to the number of all the sub-pixels in the sub-pixel area in the same sub-pixel area is larger than a preset ratio, clearing the marks of the target sub-pixels corresponding to the sub-pixel area.
In practical implementation, in the embodiment of the present invention, the sensing unit 30 includes a plurality of sensing devices, a plurality of sensing lines Sense, and a sensing driving circuit, the sensing driving circuit is electrically connected to each of the sensing lines Sense, and one sensing device corresponds to one sub-pixel in the display panel. And the sensing devices corresponding to one column of sub-pixels are electrically connected with one sensing line Sense. As shown in fig. 5, the sensing device may include: a sensing transistor Ms, a sensing capacitor Cs, and a photosensitive element P. The first end of the sensing transistor Ms is electrically connected to the corresponding sensing line Sense, the second end of the sensing transistor Ms is electrically connected to the first end of the photosensitive element P, and the control end of the sensing transistor Ms is electrically connected to the control signal end S. A first terminal of the sensing capacitor Cs is electrically connected to the first terminal of the light sensing element P, and a second terminal of the sensing capacitor Cs is electrically connected to the second terminal of the light sensing element P. The second terminal of the photosensor P is electrically connected to the reference signal terminal Vr.
In an implementation, the photosensitive element P should be disposed close to its corresponding sub-pixel, and may be disposed above or around the sub-pixel, which is not limited herein.
Specifically, in the embodiment of the present invention, each transistor may be a Thin Film Transistor (TFT) or a Metal Oxide semiconductor field effect transistor (MOS), and is not limited herein. The control terminal of each transistor is used as a gate, the first terminal of each transistor is used as a source, and the second terminal of each transistor is used as a drain, or the first terminal of each transistor is used as a drain and the second terminal of each transistor is used as a source, according to the type of each transistor and the signal of the gate of each transistor, which are not specifically distinguished herein.
In particular implementations, in the embodiments of the present invention, the units may be in the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects.
The present invention will be described in detail with reference to specific examples. It should be noted that the present embodiment is intended to better explain the present invention, but not to limit the present invention.
The display panel has 256 gray levels, i.e., the gray levels include 0-255. In all the compensation stages, the preset target gray scale may include: a first target gray level G1 (e.g. 32 gray level), a second target gray level G2 (e.g. 64 gray level), and a third target gray level (e.g. 128 gray level).
In the current compensation phase, the obtaining unit 10 may obtain the current frame data to be displayed. And, all the light emitting devices are controlled not to emit light. A fixed voltage signal is loaded on the reference signal end Vr, the photosensitive element P generates an induced current under the action of background light, and the sensing capacitor Cs stores the background voltage V0The sensing transistor Ms is turned on under the control of the control signal terminal by detecting the background voltage V on the sensing line Sense0The current brightness sensing value D of the current environment can be determined0。
As shown in fig. 3, the sub-pixels of the display panel are divided into 64 × 36 sub-pixel regions, and the display data corresponding to each sub-pixel region is determined according to the current frame data to be displayed. For each sub-pixel region, determining whether the display data X corresponding to the first target gray level G1 is included in the display data corresponding to the sub-pixel region32Display data X corresponding to the second target gray level G264Display data X corresponding to the third target gray level G3128. And if so, taking the display data corresponding to the target gray scale in the display data corresponding to the sub-pixel area as target display data. If not, selecting display data corresponding to at least one sub-pixel in the sub-pixel area, and enabling the gray close to the selected display dataAnd the display data corresponding to the target gray scale of the order is used as the target display data corresponding to the selected sub-pixel.
For example, sub-pixel region A1-1 and sub-pixel region A1-64 are taken as examples. As shown in FIG. 6, the sub-pixel area A1-1 includes a sub-pixel A1-1 corresponding to the first target gray level G132-1And sub-pixel A1-132-2The sub-pixel A1-1 corresponding to the second target gray level G264And a sub-pixel A1-1 corresponding to the third target gray level G3128(ii) a The sub-pixel a1-132-1Display data X corresponding to the first target gray level G132As sub-pixel A1-132-1Corresponding to the target display data, sub-pixel A1-132-2Display data X corresponding to the first target gray level G132As sub-pixel A1-132-2Corresponding to the target display data, sub-pixel A1-164Display data X corresponding to the second target gray level G264As sub-pixel A1-164Corresponding to the target display data, sub-pixel A1-1128Display data X corresponding to the third target gray level G3128As sub-pixel A1-1128The corresponding target display data.
As shown in FIG. 7, the sub-pixel regions A1-64 do not include sub-pixels corresponding to the first, second and third target grayscales G1, G2 and G3. Three sub-pixels are randomly selected from the sub-pixel areas A1-64, the selected sub-pixels are A1-6440、A1-6480、A1-64160Wherein, the sub-pixels A1-6440The display data of (2) corresponds to a gray scale of 40, and the sub-pixels A1-6480The gray scale corresponding to the display data of (1) is 80, and the sub-pixels A1-64160The gray scale corresponding to the display data of (2) is 160. If the 40 gray levels are closest to the first target gray level G1, the display data X corresponding to the first target gray level G1 is selected32As sub-pixels A1-64 in sub-pixel area A1-6440The target of (1) displays data. When the 80 gray level is closest to the second target gray level G2, the display data X corresponding to the second target gray level G2 is selected64As sub-pixels A1-64 in sub-pixel area A1-6480The target of (1) displays data. The 160 gray level is closest to the third target gray level G3, and the display data X corresponding to the third target gray level G3 is selected128As sub-pixel regionsSub-pixel A1-64 in A1-64160The target of (1) displays data.
And then, controlling the sub-pixels corresponding to the target display data to emit light by adopting the target display data, and acquiring a target brightness sensing value corresponding to the sub-pixels emitting light. Specifically, this step is explained below. In the following description, 1 represents a high level, and 0 represents a low level. It should be noted that 1 and 0 are logic levels, which are only used to better explain the specific operation of the embodiment of the present invention, and not specific voltage values. Similarly, the sub-pixel region A1-1 and the sub-pixel region A1-64 are taken as examples, and the selected sub-pixel (A1-1)32-1、A1-132-2、A1-164、A1-1128、A1-6440、A1-6480、A1-64160) And the sensing devices corresponding to these sub-pixels, in conjunction with the signal timing diagram shown in fig. 8, the operation process of the sensing unit 30 can be divided into the following steps:
a first sensing stage: scan is 0 and S is 1. Since Scan is 0, the first switching transistor M1 and the second switching transistor M2 are turned off, and at this time, none of the light emitting devices in the sub-pixels emits light. Since S ═ 1, the sense transistor Ms is turned on. The sub-pixel does not emit light, and the photosensitive element P generates current only under the action of background light and outputs through the sensing line Sense to discharge.
And a second sensing stage: scan is 1 and S is 0. Since Scan is 1, the first switching transistor M1 and the second switching transistor M2 are turned on. The first switching transistor M1 writes the target display Data of the input Data signal terminal Data into the gate of the driving transistor DTFT and stores the target display Data at the first terminal of the storage capacitor Cst, and the second switching transistor M2 is turned on, and the transistor characteristic compensation terminal Vsus is floated, so that the light emission of the light emitting device is not affected. Since S is 0, the sensing transistor Ms is turned off.
A third sensing phase: scan is 0 and S is 0. Since Scan is equal to 0, the first switching transistor M1 and the second switching transistor M2 are turned off, the storage capacitor Cst still stores the target display data, and the driving transistor DTFT drives the light emitting device to emit light. Since S is 0, the sensing transistor Ms is turned off, and the photosensitive element P generates an induced current under the illumination of the sub-pixel, so that the sensing capacitor Cs stores the induced voltage.
And a fourth sensing phase: scan is 1 and S is 0. Since Scan is equal to 1, the first switching transistor M1 is turned on, and the display data corresponding to the 0 gray scale is supplied to the gate of the driving transistor DTFT and the storage capacitor Cst, so that each selected sub-pixel does not emit light. Since S is 0, the sensing transistor Ms is turned off, and the sensing capacitor Cs still stores the induced voltage.
A fifth sensing phase: scan is 0 and S is 1. Since Scan is 0, the first switching transistor M1 and the second switching transistor M2 are turned off, and each sub-pixel does not emit light. Since S is 1, the Sense transistor Ms is turned on, and the Sense voltage stored in the Sense capacitor Cs can be acquired through the Sense line Sense.
And then, determining the target brightness sensing value corresponding to each sub-pixel according to the sensing voltage corresponding to each sub-pixel. Specifically, subpixel A1-132-1Corresponding target brightness sensing value T32-1Sub-pixel A1-132-2Corresponding target brightness sensing value T32-2Sub-pixel A1-164Corresponding target brightness sensing value T64Sub-pixel A1-1128Corresponding target brightness sensing value T128Sub-pixels A1-6440Corresponding target brightness sensing value T40Sub-pixels A1-6480Corresponding target brightness sensing value T80Sub-pixels A1-64160Corresponding target brightness sensing value T160. And provides these target brightness sensing values to the processing unit 40.
The processing unit 40 senses a value D according to the current brightness0And a target brightness sensing value, determining an actual optical brightness value corresponding to each selected sub-pixel. Specifically, subpixel A1-132-1Corresponding to the actual optical brightness value R32-1＝T32-1-D0Sub-pixel A1-132-2Corresponding to the actual optical brightness value R32-2＝T32-2-D0Sub-pixel A1-164Corresponding to the actual optical brightness value R64＝T64-D0Sub-pixel A1-164Corresponding to the actual optical brightness value R64＝T64-D0Sub-pixel A1-1128Corresponding to the actual optical brightness value R128＝T128-D0Sub-pixels A1-6440Corresponding to the actual optical brightness value R40＝T40-D0Sub-pixels A1-6480Corresponding to the actual optical brightness value R80＝T80-D0Sub-pixels A1-64160Corresponding to the actual optical brightness value R160＝T160-D0。
Whether the difference between the actual optical brightness values and the pre-stored initial optical brightness value D satisfies the threshold range is determined, that is, whether each actual optical brightness value is in the interval [ D- Δ, D + Δ ] is determined.
If R is32-1D is in the interval [ D- Δ, D + Δ ]]In this case, the sub-pixel A1-1 is illustrated32-1No compensation is required.
If R is32-1D is not in the interval [ D- Δ, D + Δ ]]Among them, the sub-pixel A1-1 is illustrated32-1Compensation is required. Specifically, a compensation parameter corresponding to the actual optical brightness value is determined according to the actual optical brightness value and a preset gray scale compensation lookup table. And then, determining new display data according to the determined compensation parameters and the corresponding target display data. Wherein, the corresponding R is determined in the preset gray scale compensation lookup table32-1The compensation parameter of (1). Then, according to the determined corresponding R32-1The determined compensation parameter is multiplied by the corresponding target display data to be used as new display data.
It should be noted that, when the determined actual optical brightness value cannot find a completely corresponding value in the preset gray-scale compensation look-up table, an approximation, fitting or difference method may be used to determine the compensation parameter corresponding to the actual optical brightness value. Actual optical brightness value R32-1Corresponding compensation parameter gain32-1For sub-pixel A1-132-1The compensated display data is the compensation parameter gain32-1Multiplying the original display data by the sub-pixel A1-1 in the frame data to be displayed, and replacing the sub-pixel A1-1 with the compensated display data32-1The corresponding display data and the display data of the other sub-pixels corresponding to the target gray scale are the same, and are not described herein again.
The above are only subPixel A1-132-1Corresponding actual optical brightness value R32-1The difference between the original optical brightness value D and the pre-stored initial optical brightness value D is taken as an example to explain whether the rest of the actual optical brightness values are in the interval [ D-delta, D + delta [ ]]In which the working process can be referred to the above-mentioned R32-1The process of-D will not be described in detail herein.
And then, converting the compensated display data into gray scale voltage for display, and displaying through the gray scale voltage.
Based on the same inventive concept, the embodiment of the invention also provides a display device, which comprises a display panel and the display compensation device provided by the embodiment of the invention. The principle of the display device to solve the problem is similar to the display compensation device, so the implementation of the display device can be referred to the implementation of the display control device, and repeated details are not repeated herein.
In specific implementation, the display device provided in the embodiment of the present invention may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.
Based on the same inventive concept, embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, and the program, when executed by a processor, implements the steps of any of the above-mentioned display compensation methods provided by embodiments of the present invention. In particular, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
Based on the same inventive concept, an embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the computer device implements any of the steps of the display compensation method provided by the embodiment of the present invention.
The display compensation method provided by the embodiment of the invention can be applied to compensation of the display panel aged by the light-emitting device. In the current compensation stage, the current brightness sensing value of the current environment when the display panel does not emit light is firstly obtained, the current frame data to be displayed is obtained, then the target display data corresponding to the target gray scale is determined according to the current frame data to be displayed and the predetermined target gray scale, then the sub-pixels corresponding to the target display data are controlled to emit light by adopting the target display data to obtain the target brightness sensing value corresponding to the sub-pixels emitting light, and finally the target display data corresponding to the corresponding sub-pixels can be compensated according to the current brightness sensing value of the current environment, the target brightness sensing value, the pre-stored initial optical brightness value and the predetermined gray scale compensation lookup table, so that the real-time compensation of the display panel can be realized.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A display compensation method of a display panel, comprising:
in the current compensation stage, acquiring a current brightness sensing value of the current environment when the display panel does not emit light, and acquiring current frame data to be displayed; the current frame data to be displayed comprises display data corresponding to each sub-pixel;
determining target display data corresponding to the target gray scale according to the current frame data to be displayed and the predetermined target gray scale;
controlling the sub-pixels corresponding to the target display data to emit light by adopting the target display data, and acquiring a target brightness sensing value corresponding to the luminous sub-pixels;
and compensating the target display data correspondingly input by the corresponding sub-pixel according to the current brightness sensing value of the current environment, the target brightness sensing value and a pre-stored initial optical brightness value and gray scale compensation lookup table.
2. The display compensation method as claimed in claim 1, wherein the compensating the target display data inputted corresponding to the corresponding sub-pixel according to the current brightness sensing value of the current environment, the target brightness sensing value, the pre-stored initial optical brightness value and a pre-defined gray scale compensation look-up table comprises:
determining an actual optical brightness value according to the current brightness sensing value and the target brightness sensing value;
judging whether the difference value between the actual optical brightness value and the pre-stored initial optical brightness value meets a threshold range or not;
if the difference value does not meet the threshold range, determining a compensation parameter corresponding to the actual optical brightness value according to the actual optical brightness value and a preset gray scale compensation lookup table; wherein the gray scale compensation look-up table comprises: a plurality of actual optical brightness values and compensation parameters corresponding to the actual optical brightness values one to one;
and determining new display data according to the determined compensation parameters and the corresponding target display data.
3. The display compensation method of claim 2, wherein the determining new display data specifically comprises:
and multiplying the determined compensation parameters by the corresponding target display data to obtain new display data.
4. A display compensation method according to any one of claims 1-3, wherein the sub-pixels of the display panel are divided into a plurality of sub-pixel regions;
determining target display data corresponding to the target gray scale according to the current frame data to be displayed and a predetermined target gray scale, specifically comprising:
determining display data corresponding to each sub-pixel area according to the current frame data to be displayed;
judging whether display data corresponding to the target gray scale exists in the display data corresponding to each sub-pixel area;
and if so, taking the display data corresponding to the target gray scale in the display data corresponding to the sub-pixel area as the target display data.
5. The display compensation method of claim 4, wherein if not, selecting at least one sub-pixel in the sub-pixel region, and replacing the display data corresponding to the selected sub-pixel with the display data corresponding to the closest target gray scale, so as to take the replaced display data as the target display data corresponding to the selected sub-pixel; and the gray scale corresponding to the display data of the selected sub-pixel is close to the target gray scale.
6. The display compensation method of claim 4, wherein the sub-pixel corresponding to the target display data is a target sub-pixel; after the obtaining of the target brightness sensing value corresponding to the sub-pixel emitting light, the method further includes:
marking the target sub-pixel, and in the next compensation stage, not selecting the display data corresponding to the target sub-pixel as target display data;
and when the ratio of the number of the marked target sub-pixels to the number of all sub-pixels in the sub-pixel area in the same sub-pixel area is larger than a preset ratio, clearing the mark of the target sub-pixel corresponding to the sub-pixel area.
7. A display compensation apparatus for a display panel, comprising:
the acquisition unit is used for acquiring a current brightness sensing value of the current environment when the display panel does not emit light and acquiring current frame data to be displayed; the current frame data to be displayed comprises display data corresponding to each sub-pixel;
the determining unit is used for determining target display data corresponding to the target gray scale according to the current frame data to be displayed and the predetermined target gray scale;
the sensing unit is used for controlling the sub-pixels corresponding to the target display data to emit light by adopting the target display data and acquiring target brightness sensing values corresponding to the luminous sub-pixels;
and the processing unit is used for compensating the target display data correspondingly input by the corresponding sub-pixel according to the current brightness sensing value of the current environment, the target brightness sensing value, and a pre-stored initial optical brightness value and gray scale compensation lookup table.
8. A display device comprising a display panel and the display compensation device of claim 7.
9. 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 display compensation method of a display panel according to any one of claims 1 to 6.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the display compensation method of the display panel according to any one of claims 1 to 6 when executing the program.
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