CN113409733B - Brightness compensation method and system of display panel and display panel - Google Patents
Brightness compensation method and system of display panel and display panel Download PDFInfo
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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]
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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
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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
- 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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Abstract
The invention discloses a brightness compensation method of a display panel, a system thereof and the display panel. And then, determining data compensation information which is influenced by the previous line of gray scale data and corresponds to other positions except the position closest to the source input end in the display panel by taking the brightness at the position closest to the source input end as a reference, so that the gray scale data of the current line in other positions are not influenced by the change of the previous line of gray scale data, combining the two data compensation information, enabling the position closest to the source input end to adopt the data compensation information of the full gray scale, and further eliminating the influence of the change of the previous line of gray scale data on the brightness on the basis of the data compensation information of the full gray scale at the position far away from the source input end, namely adopting the data compensation information influenced by the previous line of gray scale data, thereby improving the quality of a display picture and achieving the effect of display uniformity.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a method and a system for compensating brightness of a display panel, and a display panel.
Background
In a high pixel density (PPI) super-large display panel, due to the large load of the display panel, the inconsistent charging rate becomes a difficult problem that restricts the display uniformity of the super-large display panel. The load of the data signal line is driven by a Source chip on film (Source COF), and the driving capability of the data signal line is limited in a heavy-duty product, which mainly shows that under different picture switching, the charging rate is different, the brightness uniformity is poor, and the picture display is abnormal.
Disclosure of Invention
The embodiment of the invention provides a brightness compensation method and system of a display panel and the display panel, which are used for solving the problem of poor display brightness uniformity of a high PPI oversized display panel in the prior art.
The embodiment of the invention provides a brightness compensation method of a display panel, which comprises the following steps:
adjusting the display panel to display the same brightness by adopting an optical compensation mode, and determining data compensation information of full gray scales corresponding to each position in the display panel;
according to the data compensation information of the full gray scale corresponding to each position, determining data compensation information influenced by the gray scale data of the previous line corresponding to other positions except the position closest to the source input end in the display panel by taking the brightness of the position closest to the source input end as a reference;
and combining data compensation information affected by the gray scale data of the previous line corresponding to other positions except the position closest to the source input end in the display panel and the data compensation information of the full gray scale corresponding to the position closest to the source input end in the display panel to obtain the data compensation information corresponding to each position of the display panel.
In a possible implementation manner, the adjusting, by using an optical compensation manner, the display panel to display the same brightness, and determining data compensation information corresponding to full gray scales at each position in the display panel specifically include:
driving the display panel by using gray scale data corresponding to the target brightness;
acquiring the actual brightness of each position in the display panel;
and adjusting the gray scale data at the position where the difference between the actual brightness and the target brightness is greater than a set value until the difference between the actual brightness and the target brightness at the position is less than the set value after the adjusted gray scale data is adopted to drive the display panel, and taking the finally adjusted gray scale data as the data compensation information of the position corresponding to the gray scale data.
In one possible implementation manner, all gray-scale data corresponding to each position in the display panel determine data compensation information in an optical compensation manner.
In a possible implementation manner, data compensation information is determined by using an optical compensation manner for a part of gray scale data corresponding to each position in the display panel, and data compensation information is determined by using a data fitting manner for another part of gray scale data.
In a possible implementation manner, determining, according to the data compensation information of the full gray scale corresponding to each position, data compensation information affected by the gray scale data of the previous line corresponding to the other positions except the position closest to the source input end in the display panel with reference to the brightness of the position closest to the source input end specifically includes:
determining data compensation information which is provided by the same data signal line to the position closest to the source input end and other positions and is influenced by the gray scale data of the previous line when the same brightness is displayed;
and fitting the data compensation information influenced by the following line of gray scale data corresponding to the display panel except the position closest to the source input end by adopting the data compensation information of the full gray scale corresponding to each position according to the data compensation information influenced by the following line of gray scale data corresponding to the present line of gray scale data.
In a possible implementation manner, determining that the same data signal line is provided for a position closest to the source input end and other positions, and when the same brightness is displayed, the data compensation information affected by the previous line of gray scale data corresponding to the line of gray scale data specifically includes:
determining a current value corresponding to the gray scale data of the line when the position closest to the source input end is at a plurality of selected different gray scale data of the previous line;
and determining data compensation information influenced by the previous line of gray scale data corresponding to the current line of gray scale data when the current value at the position closest to the source input end is taken as a reference to perform the same brightness display when other positions except the position closest to the source input end are in the same previous line of gray scale data and the same current line of gray scale data.
In a possible implementation manner, the selected different previous row gray scale data includes previous row gray scale data larger than the current row gray scale data, previous row gray scale data equal to the current row gray scale data, and previous row gray scale data smaller than the current row gray scale data.
In a possible implementation manner, the fitting, according to the data compensation information affected by the previous line of gray scale data corresponding to the current line of gray scale data, the data compensation information affected by the previous line of gray scale data corresponding to other positions except the position closest to the source input end in the display panel by using the data compensation information corresponding to the full gray scale at each position, specifically includes:
and performing data fitting by adopting the following formula to obtain data compensation information affected by the gray scale data of the previous line corresponding to other positions except the position closest to the source input end:
when the previous line of gray-scale Data is larger than the present line of gray-scale Data, f (x) kx + y + a, x Data (N-1) -Data (N);
when the previous line gray-scale DATA is smaller than the present line gray-scale DATA, f (x) ═ k 'x + y + a', x ═ DATA (N) — DATA (N-1);
wherein, f (x) is Data compensation information affected with the previous line gray scale Data, y is Data compensation information of the full gray scale corresponding to the position, Data (N-1) is the previous line gray scale Data, Data (N) is the current line gray scale Data, k and k 'are adjustment coefficients, and a' are correction values.
On the other hand, an embodiment of the present invention further provides a system for compensating brightness of a display panel, including:
the image acquisition device is used for acquiring the image displayed by the display panel;
and the signal processing device is used for acquiring the image from the image acquisition device, executing the method to determine the data compensation information corresponding to each position in the display panel and storing the data compensation information in the display panel.
On the other hand, an embodiment of the present invention further provides a display panel, including:
and the flash memory is used for storing data compensation information of each position in the display panel, and the data compensation information compensation value is determined by adopting the method.
The invention has the following beneficial effects:
according to the brightness compensation method, the system and the display panel of the display panel provided by the embodiment of the invention, after the display panel is adjusted to display the same brightness, the influence of the previous row of gray scale data on the current row of gray scale data can be eliminated, namely, the display panel is driven by a direct current data signal, and full gray scale data compensation information is obtained aiming at signal delay. Then, according to the basic that the display brightness influence is small when the gray scale data of the current line in the position closest to the source input end is changed in the gray scale data of the last line, determining data compensation information which is influenced by the gray scale data of the previous line and corresponds to other positions except the position closest to the source input end in the display panel by taking the brightness of the position closest to the source input end as a reference so that the gray scale data of the current line in other positions are not influenced by the change of the gray scale data of the previous line, combining the two data compensation information so that the position closest to the source input end adopts the data compensation information of the full gray scale, and the position farther from the source input end further eliminates the influence of the change of the gray scale data of the previous line on the brightness on the basis of the data compensation information of the full gray scale, namely, the data compensation information affected by the previous line of gray scale data is adopted, so that the quality of a display picture can be improved, and the effect of display uniformity is achieved.
Drawings
FIG. 1 is a schematic diagram of the signals of Gate and Data in an oversized display panel;
FIG. 2a is a schematic diagram of the signals of Gate and Data at position (x) in FIG. 1;
FIG. 2b is a schematic diagram of the signals of Gate and Data at location (r) in FIG. 1;
FIG. 3 is a flowchart illustrating a method for compensating brightness of a display panel according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a method for compensating brightness of a display panel according to an embodiment of the present invention;
FIG. 5 is another specific flowchart of a method for compensating brightness of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a system for compensating pixel brightness of a display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. And the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items.
At present, the size of a display panel is larger, and in an ultra-large display panel, a gate driver circuit (GOA) generally adopts bilateral driving, namely a GOA circuit is arranged on a left frame and a right frame, a data driver circuit generally adopts unilateral driving, and the driving mode has a forward effect on narrow frames and binding yield. IN the oversized display Panel, a loaded Data signal (Data) and a clock signal (CLK) of a GOA enter the Panel (Panel) from a Source input End (Source IN), a first line output signal of the GOA is arranged on one side of the Source output End (Source End), and then the GOA transfers a cascaded gate driving signal from the Source End side to the Source IN side step by step. Due to the load Delay (RC Loading) of the signal lines such as the gate signal line and the data signal line, the Delay of the input (In) End of CLK, i.e., Source In End, is the smallest, and the Delay of the output (End) End of CLK, i.e., Source End, is the largest, so there is a difference between the Source In End and the Source End of the GOA output, which mainly means that the Delay (Delay) of the output gate driving signal is different. And because the GOA adopts bilateral drive, the middle of the Delay passing through the grid signal line and the Panel is the area with the most serious grid drive signal Delay, the Panel can be equivalent to four positions marked as (i) and (ii) in figure 1, wherein the signal timing diagram of the grid drive signal (Gate) and the Data signal (Data) at each position is marked, the area with the most serious Data signal Delay is the position (i.e. the position farthest from the source input end and farthest from the grid drive circuit has the most serious Data signal Delay, and the position closest to the source input end and closer to the grid drive circuit has no obvious Data signal Delay (i).
Since the large-size panel adopts the external compensation structure, the Gate driving signal (Gate) is pre-charged and opened in advance, when the Gate is at a high level, the Data continuously jumps, and for the same Data line, the Data signal Data (N-1) (also referred to as the previous line gray scale Data) related to the writing of the Data signal Data (N) (also referred to as the current line gray scale Data) at the current line is the previous line Data signal Data (N-1) (also referred to as the previous line gray scale Data), referring to the signal timing diagram of the Gate driving signal (Gate) and the Data signal (Data) at the position (c) shown in fig. 2a and the signal timing diagram of the Gate driving signal (Gate) and the Data signal (Data) at the position (c) shown in fig. 2b, it can be seen that the larger the difference between the Data (N-1) and the Data (N), the larger the influence on the Data writing.
The following tables 1 to 3 list simulation values of current values and voltage values corresponding to the positions (c) and (c) when Data (N-1) changes from 2.5V to 6.5V, and Data (N) respectively changes from 2.5V to 4.5V and 6.5V, and it can be seen from the values in the tables that the voltage values and the current values at the positions (c) do not change much with the change of the Data (N-1), so that the display brightness at the positions (c) is influenced little, and the voltage values and the current values at the positions (c) change much, so that the display brightness at the positions (c) is influenced greatly, that is, the previous row Data signals at different positions have different influences on the display brightness.
TABLE 1
TABLE 2
TABLE 3
Based on this, the embodiment of the invention provides a brightness compensation method for a display panel, which combines a charging rate simulation rule to provide a gray scale compensation design for a data signal, so that the problem of non-uniform charging rate of a super-large-size display panel can be solved, and the effect of improving the uniformity of a display picture can be achieved.
Specifically, the method for compensating luminance of a display panel according to an embodiment of the present invention, as shown in fig. 3, includes the following steps:
s101, adjusting the display panel to display the same brightness by adopting an optical compensation mode, and determining data compensation information of full gray scales corresponding to each position in the display panel;
s102, according to the data compensation information of the full gray scale corresponding to each position, determining data compensation information affected by the gray scale data of the previous line corresponding to other positions except the position closest to the source input end in the display panel by taking the brightness of the position closest to the source input end as a reference;
s103, combining data compensation information which is influenced by the previous line of gray scale data and corresponds to other positions except the position closest to the source input end in the display panel and data compensation information of full gray scale corresponding to the position closest to the source input end in the display panel to obtain data compensation information corresponding to each position of the display panel.
In the brightness compensation method provided in the embodiment of the present invention, after the display panel is adjusted to display the same brightness in S101, the influence of the previous line of gray scale data on the current line of gray scale data can be eliminated, that is, the display panel is driven by a direct current data signal, and a corresponding full gray scale compensation lookup table can be specifically established for full gray scale data compensation information obtained by delaying Gate. Then, according to the basis that the influence of the display brightness of the gray scale data of the current line in the position closest to the source input end is small when the gray scale data of the current line is changed, the brightness of the position closest to the source input end is taken as the reference, the data compensation information influenced by the gray scale data of the previous line corresponding to the positions except the position closest to the source input end in the display panel is determined, so that the gray scale data of the current line in the other positions is not influenced by the change of the gray scale data of the previous line, in the step S103, the two data compensation information obtained in the step S101 and the step S102 are combined, the position closest to the source input end adopts the data compensation information of the full gray scale, the position farther from the source input end further eliminates the influence of the gray scale data change of the previous line on the brightness on the basis of the data compensation information of the full gray scale, namely, the data compensation information influenced by the gray scale data of the previous line is adopted, so that the quality of the display picture can be improved, the effect of displaying uniformity is achieved.
It should be noted that, in the display panel mentioned in the present invention, each position refers to dividing the display area into a plurality of areas, each area includes at least one pixel, one area is equivalent to one position, one area can be regarded as a whole, and the pixels in the area can adopt the same data compensation mechanism.
Optionally, in the brightness compensation method provided in the embodiment of the present invention, in step S101, the same brightness displayed on the display panel is adjusted by using an optical compensation method, and the data compensation information of the full gray scale corresponding to each position in the display panel is determined, as shown in fig. 4, the following steps may be specifically adopted to implement:
s201, driving a display panel by adopting gray scale data corresponding to target brightness; that is, the same gray scale data is adopted to drive each position in the display panel;
s202, acquiring actual brightness of each position in a display panel; because the Gate signal loads at various positions in the display panel are different, positions where the actual brightness is different from the target brightness can appear;
s203, determining whether a position with the difference between the actual brightness and the target brightness larger than a set numerical value exists; if yes, go to step S204; if not, exiting the process;
s204, adjusting gray scale data at a position where the difference between the actual brightness and the target brightness is larger than a set value;
s205, driving the display panel again by adopting the adjusted gray scale data, and determining the actual brightness of each position in the display panel;
s206, determining whether the difference between the actual brightness and the target brightness at the position is smaller than a set value; if yes, go to step S207; if not, executing step S204;
s207, the finally adjusted gray scale data is used as data compensation information of the gray scale data corresponding to the position.
In a specific implementation, all the gray scale data, for example, the gray scale data of 0 to 255, may be used to drive the display panel, and the data compensation information corresponding to each gray scale data at each position is calculated, that is, all the gray scale data corresponding to each position in the display panel determine the data compensation information in an optical compensation manner. Or, part of the whole gray scale data may be selected, for example, high, medium and low gray scale data are selected to respectively drive the display panel, data compensation information corresponding to the high, medium and low gray scale data at each position is calculated, and then data compensation information corresponding to other gray scale data is calculated in a data fitting manner, that is, data compensation information is determined by optical compensation for part of the gray scale data corresponding to each position in the display panel, and data compensation information is determined by data fitting for the other part of the gray scale data.
Specifically, in the brightness compensation method provided in the embodiment of the present invention, after the data compensation information corresponding to the full gray scale is established, that is, the full gray scale compensation lookup table is established, for the positions of the display panel except the position closest to the source input end, the influence of the gray scale data of the current line changing with the gray scale data of the previous line needs to be eliminated, that is, the data compensation information influenced by the gray scale data of the previous line corresponding to the positions of the display panel except the position closest to the source input end is calculated, as shown in fig. 5, in the brightness compensation method provided in the embodiment of the present invention, the step S102 may specifically be implemented by:
s301, determining data compensation information which is provided by the same data signal line to the position closest to the source input end and other positions and is affected by the gray scale data of the line when the same brightness is displayed;
s302, according to data compensation information affected by the previous line of gray scale data corresponding to the current line of gray scale data, the data compensation information affected by the previous line of gray scale data corresponding to other positions except the position closest to the source input end in the display panel is fitted by adopting the data compensation information of the full gray scale corresponding to each position.
Specifically, the step S301 may be implemented by:
firstly, the current value corresponding to the gray scale data of the current row when the position closest to the source input end is at the selected gray scale data of a plurality of different previous rows can be determined.
Specifically, the selected different previous row gray scale data may include previous row gray scale data larger than the current row gray scale data, previous row gray scale data equal to the current row gray scale data, and previous row gray scale data smaller than the current row gray scale data.
For example, Table 4 below lists simulated values for current values for locations (C) where Data (N-1) varies from 2.5V-6.5V, and Data (N) is 2.5V, 4.5V, and 6.5V, respectively. Referring to table 4, for example, when the current value corresponding to the present line of gray-scale Data (N) is 2.5V and the current value corresponding to the previous line of gray-scale Data (N-1) is 2.5V is 3.462nA, similarly, when the current value corresponding to the present line of gray-scale Data (N) is 2.5V and the current value corresponding to the previous line of gray-scale Data (N-1) is 4.5V, the current value corresponding to the present line of gray-scale Data is 4.04nA, and so on.
TABLE 4
And then, when the same previous line gray scale data and the same current line gray scale data are positioned at other positions except the position closest to the source input end, and the current value at the position closest to the source input end is taken as a reference to perform the same brightness display, determining data compensation information influenced by the previous line gray scale data corresponding to the current line gray scale data.
For example, table 5 below lists simulated values of voltage values and compensation values required to be adjusted for Data (N) based on the corresponding positions (luminance (current value)) when Data (N-1) varies from 2.5V to 6.5V and Data (N) is 2.5V, 4.5V, and 6.5V, respectively. Referring to table 5, when the current value of the local line gray-scale Data (N) at the position (iv) is 2.5V and the previous line gray-scale Data (N-1) is 2.5V, if the current value is to be equal to the current value 3.462nA corresponding to the position (iv) in table 4, that is, the brightness of the position (iv) is equal to the brightness of the position (V), the local line gray-scale Data (N) is adjusted to 2.552V, that is, Data (N) is 2.552V, and the local line gray-scale Data (N) before adjustment is subtracted from the adjusted local line gray-scale Data (N) 2.552V, so that the compensation value of the local line gray-scale Data (N) is 0.052V when the local line gray-scale Data (N) is 2.5V and the previous line gray-scale Data (N-1) is 2.5V. Similarly, when the current value of the current Data (N) at the position (r) is 2.5V and the previous Data (N-1) at the position (r) is 4.5V, if the current value is to reach the current value of 4.04nA corresponding to the position (r) in table 4, that is, the brightness of the current value is consistent with the brightness of the position (r), the current Data (N) at the position (r) needs to be adjusted to 2.334V, that is, Data (N) is adjusted to 2.334V, and the current Data (N) before adjustment is subtracted from the adjusted current Data (N) 2.334V (N) at the position (r) to obtain the compensation value of-0.166V when the current Data (N) at the position (r) is 2.5V and the previous Data (N-1) at the position (r) is 4.5V.
TABLE 5
In this way, only data compensation information of several local rows of gray-scale data affected by several different previous rows of gray-scale data is determined, and if data compensation information of all local rows of gray-scale data affected by the previous rows of gray-scale data is to be determined, data fitting needs to be performed, specifically, step S302 may be implemented by:
and performing data fitting by adopting the following formula to obtain data compensation information influenced by the gray scale data of the previous line corresponding to other positions except the position closest to the source input end:
when the previous line of gray-scale Data is larger than the present line of gray-scale Data, f (x) kx + y + a, x Data (N-1) -Data (N);
when the previous line gray-scale DATA is smaller than the present line gray-scale DATA, f (x) ═ k 'x + y + a', x ═ DATA (N) — DATA (N-1);
wherein, f (x) is Data compensation information affected by the previous line gray scale Data, y is Data compensation information of the full gray scale corresponding to the position, the Data can be obtained by searching a full gray scale compensation lookup table, Data (N-1) is the previous line gray scale Data, Data (N) is the current line gray scale Data, k and k 'are adjustment coefficients, and a' are correction values.
Based on the same inventive concept, an embodiment of the present invention further provides a system for compensating brightness of a display panel, please refer to fig. 6, including:
an image acquisition device 601 for acquiring an image displayed by the display panel; the image displayed by the display panel is presented in the display area, and therefore, the captured image is the image corresponding to the display area in the display panel.
The signal processing device 602 is configured to obtain an image from the image capturing device 601, perform the brightness compensation method for the display panel as described above to determine data compensation information corresponding to each position in the display panel, and store the data compensation information in the display panel.
For a specific implementation of the brightness compensation method of the display panel, reference may be made to the description of the method embodiment, and repeated descriptions are omitted.
The signal processing device 602 may store the data compensation information of each position in the display panel in a Flash memory (Flash) of the display panel in a form of a lookup table after obtaining the data compensation information.
Based on the same inventive concept, an embodiment of the present invention further provides a display panel, including:
and a flash memory for storing data compensation information for each position in the display panel, the data compensation information being determined using the brightness compensation method for the display panel as described above.
The display panel can be an OLED display panel or a liquid crystal display panel.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the invention may take the form of a computer program product embodied on one or more readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer/processor-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These program instructions may also be stored in a readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer/processor implemented process such that the instructions which execute on the computer/processor or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
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 (7)
1. A method for compensating brightness of a display panel, comprising:
adjusting the display panel to display the same brightness by adopting an optical compensation mode, and determining data compensation information of full gray scales corresponding to each position in the display panel;
determining a current value corresponding to the gray scale data of the line when the position closest to the source input end is at a plurality of selected different gray scale data of the previous line;
determining data compensation information which is influenced by the gray scale data of the current line when the gray scale data of the same previous line and the gray scale data of the same current line are displayed at other positions except the position closest to the source input end and the current value of the position closest to the source input end is taken as a reference for the same brightness;
and performing data fitting by adopting the following formula to obtain data compensation information affected by the gray scale data of the previous line corresponding to other positions except the position closest to the source input end:
when the previous line of gray-scale Data is larger than the present line of gray-scale Data, f (x) kx + y + a, x Data (N-1) -Data (N);
when the previous line of gray-scale DATA is smaller than the present line of gray-scale DATA, f (x) ═ k 'x + y + a', x ═ DATA (N) -DATA (N-1);
wherein, f (x) is Data compensation information affected with the previous line gray scale Data, y is Data compensation information of the full gray scale corresponding to the position, Data (N-1) is the previous line gray scale Data, Data (N) is the current line gray scale Data, k and k 'are adjustment coefficients, and a' are correction values;
and combining data compensation information affected by the gray scale data of the previous line corresponding to other positions except the position closest to the source input end in the display panel and the data compensation information of the full gray scale corresponding to the position closest to the source input end in the display panel to obtain the data compensation information corresponding to each position of the display panel.
2. The brightness compensation method according to claim 1, wherein the optically compensating for adjusting the display panel to display the same brightness and determining the data compensation information corresponding to the full gray scale at each position in the display panel specifically comprises:
driving the display panel by adopting gray scale data corresponding to the target brightness;
acquiring actual brightness of each position in the display panel;
and adjusting the gray scale data at the position where the difference between the actual brightness and the target brightness is greater than a set value until the difference between the actual brightness and the target brightness at the position is less than the set value after the adjusted gray scale data is adopted to drive the display panel, and taking the finally adjusted gray scale data as the data compensation information of the position corresponding to the gray scale data.
3. The luminance compensation method as claimed in claim 2, wherein the data compensation information is determined by optically compensating for all gray scale data corresponding to each position in the display panel.
4. The luminance compensation method as claimed in claim 2, wherein a portion of the gray scale data corresponding to each position in the display panel determines the data compensation information by optical compensation, and another portion of the gray scale data determines the data compensation information by data fitting.
5. The method as claimed in claim 1, wherein the selected different previous row gray scale data includes a previous row gray scale data larger than the current row gray scale data, a previous row gray scale data equal to the current row gray scale data, and a previous row gray scale data smaller than the current row gray scale data.
6. A system for compensating brightness of a display panel, comprising:
the image acquisition device is used for acquiring the image displayed by the display panel;
a signal processing device, configured to obtain the image from the image acquisition device, perform the method according to any one of claims 1 to 5, determine data compensation information corresponding to each position in the display panel, and store the data compensation information in the display panel.
7. A display panel, comprising:
a flash memory for storing data compensation information for each location in the display panel, the data compensation information compensation value being determined using the method of any one of claims 1-5.
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| EP2159783A1 (en) * | 2008-09-01 | 2010-03-03 | Barco N.V. | Method and system for compensating ageing effects in light emitting diode display devices |
| KR102145391B1 (en) * | 2013-07-18 | 2020-08-19 | 삼성디스플레이 주식회사 | Display device and driving method thereof |
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| CN107045863B (en) * | 2017-06-26 | 2018-02-16 | 惠科股份有限公司 | Gray scale adjusting method and device of display panel |
| CN107170419B (en) * | 2017-06-29 | 2019-09-17 | 惠科股份有限公司 | Display panel driving method and system and display device |
| CN109448660B (en) * | 2018-12-29 | 2022-03-01 | 成都中电熊猫显示科技有限公司 | Method, device and storage medium for improving color cast of display visual angle |
| CN110021267B (en) * | 2019-03-07 | 2021-01-26 | 京东方科技集团股份有限公司 | Method and device for compensating brightness uniformity of display panel |
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