CN111028779A - Display panel compensation method and device and display panel - Google Patents
Display panel compensation method and device and display panel Download PDFInfo
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- CN111028779A CN111028779A CN202010002141.2A CN202010002141A CN111028779A CN 111028779 A CN111028779 A CN 111028779A CN 202010002141 A CN202010002141 A CN 202010002141A CN 111028779 A CN111028779 A CN 111028779A
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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
- 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
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Abstract
The invention discloses a compensation method and device of a display panel and the display panel. The method comprises the following steps: establishing a functional relation model for acquiring the exposure time of the display brightness of the display panel and the gray scale and the brightness of the display panel; acquiring the display brightness of the display panel at a preset gray scale, and calculating the exposure time of the display panel at the preset gray scale based on the functional relation model; exposing the display panel by adopting exposure time to obtain the optical brightness of the display panel; and acquiring compensation data of the display panel according to the optical brightness. When the optical brightness of the display panel is obtained at the exposure time corresponding to the preset gray scale by adopting the display panel calculated based on the functional relation model, the optical brightness of the display panel is closer to a real value, namely, the accuracy of the brightness data extracted by the display panel is improved, so that the accuracy of the compensation data of the display panel is improved, the mura compensation precision of the display panel is improved, and the brightness uniformity of the display panel is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a compensation method and device for a display panel and the display panel.
Background
When an Organic Light-Emitting Diode (OLED) display panel displays, the problem of poor brightness uniformity, i.e., mura phenomenon, exists. When mura is compensated, the light emitting brightness of the display panel needs to be acquired, and mura compensation data is calculated through the light emitting brightness. When the brightness of the display panel is not accurately acquired, the mura compensation data obtained by calculation is also not accurate, so that the mura compensation effect is influenced.
Disclosure of Invention
The invention provides a compensation method and device of a display panel and the display panel, which are used for improving the compensation precision of the display panel and further improving the brightness uniformity of the display panel.
In a first aspect, an embodiment of the present invention provides a compensation method for a display panel, including:
establishing a functional relation model for acquiring the exposure time of the display brightness of the display panel and the gray scale and the brightness of the display panel;
acquiring the display brightness of a display panel at a preset gray scale, and calculating the exposure time of the display panel at the preset gray scale based on the functional relation model;
exposing the display panel by adopting the exposure time to obtain the optical brightness of the display panel;
and acquiring compensation data of the display panel according to the optical brightness.
Optionally, establishing a functional relationship model between the exposure time for acquiring the display brightness of the display panel and the gray scale and brightness of the display panel includes:
acquiring exposure time of a plurality of display panels when the display brightness of the display panels is acquired under a specific gray scale, wherein the specific gray scale, the display brightness and the exposure time are used as a sample set;
and training the sample set by taking the specific gray scale and the display brightness as input parameters and the exposure time as output parameters, and establishing a functional relation model for acquiring the exposure time of the display brightness of the display panel and the gray scale and the brightness of the display panel.
Optionally, training the sample set comprises:
training the sample set through a neural network algorithm.
Optionally, after obtaining compensation data of the display panel according to the optical brightness, the method further includes:
and compensating the optical brightness of the display panel according to the compensation data.
Optionally, exposing the display panel with the exposure time to obtain the optical brightness of the display panel includes:
exposing the display panel by adopting the exposure time to obtain the image brightness data of the display panel;
and calculating the optical brightness of each pixel in the display panel according to the picture brightness data of the display panel.
In a second aspect, an embodiment of the present invention further provides a compensation apparatus for a display panel, including:
the exposure time function model establishing module is used for establishing a function relation model of the exposure time for acquiring the display brightness of the display panel and the gray scale and the brightness of the display panel;
the exposure time calculation module is used for acquiring the display brightness of the display panel at a preset gray scale and calculating the exposure time of the display panel at the preset gray scale based on the functional relation model;
the optical brightness acquisition module is used for exposing the display panel by adopting the exposure time to acquire the optical brightness of the display panel;
and the compensation data acquisition module is used for acquiring the compensation data of the display panel according to the optical brightness.
Optionally, the module for modeling the exposure time function includes:
the system comprises a sample set acquisition module, a display brightness acquisition module and a display brightness acquisition module, wherein the sample set acquisition module is used for acquiring the exposure time of a plurality of display panels when the display brightness of the display panels is acquired under a specific gray scale, and the specific gray scale, the display brightness and the exposure time are used as a sample set;
and the training module is used for training the sample set by taking the specific gray scale and the display brightness as input parameters and taking the exposure time as an output parameter to establish a function model of the exposure time.
Optionally, the compensation apparatus of the display panel further includes:
and the brightness compensation module is used for compensating the display brightness of the display panel according to the compensation data.
Optionally, the optical brightness obtaining module includes:
the image brightness data acquisition module is used for exposing the display panel by adopting the exposure time to acquire image brightness data of the display panel;
and the brightness calculation module is used for calculating the optical brightness of each pixel in the display panel according to the image brightness data of the display panel.
In a third aspect, an embodiment of the present invention further provides a display panel, including a storage device, where compensation data of the display panel, obtained by the compensation method for the display panel provided in any embodiment of the present invention, is stored in the storage device.
According to the technical scheme of the embodiment of the invention, a functional relation model for acquiring the exposure time of the display brightness of the display panel and the gray scale and brightness of the display panel is established, then the display brightness of the display panel at the preset gray scale is obtained, the exposure time corresponding to the preset gray scale of the display panel is calculated based on the functional relation model, the exposure time is adopted to expose the display panel to obtain the optical brightness of the display panel, and the compensation data of the display panel is obtained according to the optical brightness. When the exposure time corresponding to the preset gray scale of the display panel calculated based on the functional relation model is used for obtaining the optical brightness of the display panel, the exposure time corresponding to the preset gray scale can be adjusted according to the display brightness of the display panel instead of setting the exposure time as a fixed value. Therefore, the exposure time can be closer to the exposure time corresponding to the actual brightness value of the display panel, the difference between the optical brightness of the display panel and the actual brightness value of the display panel caused by the exposure time is reduced, the optical brightness of the display panel is closer to the actual brightness value, namely, the accuracy of the brightness data extracted by the display panel is improved, the accuracy of the mura data of the display panel identified according to the existing correlation algorithm is improved, the accuracy of the compensation data of the display panel formed according to the mura data and the existing compensation algorithm is improved, the mura compensation accuracy of the display panel is improved, and the brightness uniformity of the display panel is improved.
Drawings
Fig. 1 is a flowchart illustrating a compensation method for a display panel according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a compensation method for a display panel according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a compensation apparatus of a display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The OLED display panel includes a plurality of OLED devices. When the OLED device is manufactured, the process has certain precision, so that a plurality of OLED devices manufactured in the same process have certain difference. When the OLED display panel displays, the difference among the plurality of OLED devices shows that the brightness of the emitted light is different, namely, the mura phenomenon. In order to improve the brightness uniformity of the OLED display panel, the light emitting brightness of the OLED display panel may be compensated. The compensation method can be internal compensation and external compensation. The internal compensation refers to a method of compensating inside a pixel using a sub-circuit constructed with a thin film transistor. The external compensation refers to a method of sensing electrical or optical characteristics of the pixel by an external driving circuit or device and then compensating. When the optical characteristics of the pixels are sensed to carry out external compensation, the light emitting brightness of the OLED display panel needs to be acquired, and mura compensation data are calculated through the light emitting brightness.
When obtaining the luminance of the OLED display panel, a Device such as a Charge Coupled Device (CCD) may be used to take a picture, and then the luminance is obtained according to the picture luminance data obtained by taking the picture. When a device such as a CCD is used for photographing, the exposure time of the device such as the CCD influences the brightness of the light obtained by photographing. The longer the exposure time, the brighter the light emission luminance obtained by photographing. The light emission luminance obtained by photographing can be made close to or equal to the actual display luminance of the display panel by setting the exposure time of the CCD or the like. When the display panels of the same model are photographed, sampling photographing can be performed on the OLED display panels produced in the same batch to obtain exposure time corresponding to actual display brightness of the display panels, and the average value of the exposure time is calculated to be used as exposure parameters for photographing all the OLED display panels produced in the same batch, so that the difference of the light-emitting brightness of the OLED display panels produced in the same batch is caused only by the mura phenomenon. However, the exposure times of different OLED display panels are different, so that the calculated average value of the exposure times cannot be applied to all the OLED display panels, and the difference of the light emission luminance obtained by the OLED display panels includes the difference caused by the different exposure times. Namely, the obtained light emitting brightness of the OLED display panel is not accurate. At this time, the mura compensation data calculated from the light emission luminance is also inaccurate. Therefore, after compensation is carried out according to the mura compensation data, the mura compensation effect of the OLED display panel is poor. Illustratively, table 1 is a comparison table of exposure times of two OLED display panels produced in the same batch. As shown in table 1, OLED1# is one OLED display panel, OLED2# is another OLED display panel, and R, G and B represent red, green, and blue sub-pixels, respectively. When acquiring the brightness, the exposure time of the same gray scale and the same color sub-pixel corresponding to the OLED1# and the OLED2# are different. When the same exposure time is adopted for exposure, the brightness difference of the OLED1# and the OLED2# comprises the brightness difference caused by different exposure times and the brightness difference caused by mura, so that the mura compensation data calculated through the brightness are inaccurate, and the mura compensation effect of the OLED display panel is poor. The 224 gray levels are used as an example for explanation. When the light emitting brightness of the display panel is a real value, the exposure time corresponding to the R sub-pixel in the OLED1# is 29.9ms, and the exposure time corresponding to the R sub-pixel in the OLED2# is 31.4 ms. When both are exposed with the same exposure time, for example, 30.0ms, the emission luminance of R in OLED1# differs from the true value, and the emission luminance of OLED2# differs from the true value. That is, the light emitting brightness difference between the OLED1# and the OLED2# includes the light emitting brightness difference caused by the difference of the exposure time, so that the mura compensation data calculated by the light emitting brightness is inaccurate, and the mura compensation effect of the OLED display panel is poor.
TABLE 1
In view of the above technical problems, an embodiment of the present invention provides a compensation method for a display panel. Fig. 1 is a flowchart of a compensation method of a display panel according to an embodiment of the present invention. As shown in fig. 1, the method includes:
s110, establishing a functional relation model for acquiring the exposure time of the display brightness of the display panel and the gray scale and the brightness of the display panel.
Specifically, when the mura phenomenon of the display panel is compensated by using the external compensation method, the display luminance of the display panel needs to be collected. When the display brightness of the display panel is collected, the display panel can be photographed by adopting devices such as a CCD (charge coupled device) and the like so as to collect the display brightness of the display panel. The acquired display brightness of the display panel and the actual brightness value of the display panel can be the same. When the CCD and other devices are adopted for photographing, other conditions are unchanged when the CCD photographs, and the exposure time for acquiring the display brightness of the display panel is positively correlated with the display brightness of the display panel within a certain range. Other conditions when the CCD photographs may include a focal length when the CCD photographs, a distance between the CCD and the display panel, and the like. In addition, the display brightness of the display panel is also related to the gray scale, so the collected display brightness of the display panel is related to the exposure time and the gray scale. By taking the display brightness and the gray scale of the display panel as independent variables and collecting the exposure time of the display brightness of the display panel as dependent variables, a functional relation model of the exposure time for collecting the display brightness of the display panel and the gray scale and the brightness of the display panel can be established. After the display brightness and the gray scale of the display panel are determined, the exposure time of the display brightness of the display panel can be calculated through the functional relation model, and therefore the exposure time of the display brightness of the display panel is changed according to the display brightness and the gray scale of the display panel.
And S120, acquiring the display brightness of the display panel at the preset gray scale, and calculating the exposure time of the display panel at the preset gray scale based on the functional relation model.
Specifically, the preset gray scale may be a preset gray scale. For example, when the display panel includes gray scales of 0-255, the predetermined gray scale may be any one of gray scales of 0-255. When the display brightness of the display panel at the preset gray scale is obtained, the preset gray scale is a known value. The obtained display brightness of the display panel at the preset gray scale is the display brightness corresponding to the preset gray scale, and at the moment, the exposure time of the display panel at the preset gray scale can be calculated based on the functional relation model. The display brightness of different display panels at the preset gray scale can be different, and the exposure time of different display panels at the preset gray scale calculated based on the functional relation model is different. That is, when different display panels are photographed, the exposure time for acquiring the brightness real values of the different display panels is different. When different display panels adopt different exposure times, the exposure time can be closer to the exposure time corresponding to the actual brightness value of the display panel, the difference between the actual brightness value of the display panel and the optical brightness value of the display panel caused by the exposure time is reduced, and the subsequently acquired optical brightness is more similar to the actual brightness value of each display panel, so that the accuracy of the subsequently acquired optical brightness of different display panels is improved.
In the process flow for manufacturing the display panel, a test process flow for the display panel is included. When the display panel is tested, the display panel needs to be subjected to screen dotting of a specific gray scale, the display brightness of the display panel at the specific gray scale is obtained, and the performance of the display panel is analyzed. Therefore, when the display brightness of the display panel at the preset gray scale is obtained, the display brightness of the display panel at the specific gray scale in the test process flow can be used as the display brightness of the display panel at the preset gray scale. Or, the display brightness of the display panel at the preset gray scale can be obtained by photographing through devices such as a CCD (charge coupled device).
And S130, exposing the display panel by adopting the exposure time to acquire the optical brightness of the display panel.
Specifically, after the photographing exposure time corresponding to the display panel is determined, the exposure time is adopted to expose the display panel so as to acquire the optical brightness of the display panel. Because the optical brightness of the display panel obtained by photographing with the exposure time corresponding to the display panel is closer to the true value, the influence of the exposure time on the optical brightness obtained by exposing the display panel by adopting the exposure time is reduced, the obtained optical brightness is closer to the true value, and the accuracy of the optical brightness of the display panel is improved.
The optical brightness is the display brightness of the display panel obtained by exposing the display panel for the exposure time calculated by the functional relation model.
And S140, acquiring compensation data of the display panel according to the optical brightness.
Specifically, after obtaining the optical brightness of the display panel, mura of the display panel may be identified according to an existing correlation algorithm to form mura data, and then compensation data of the display panel may be formed according to the mura data and an existing compensation algorithm. After acquiring the compensation data of the display panel according to the optical brightness, the method further comprises the following steps: and compensating the optical brightness of the display panel according to the compensation data. The method specifically comprises the following steps: after the compensation data of the display panel is obtained, the compensation data can be burned into a memory of the display panel for mura compensation by the display panel when displaying. Because the optical brightness of the display panel is closer to the true brightness value, namely the accuracy of the brightness data extracted by the display panel is improved, and the accuracy of the mura data of the display panel identified according to the existing related algorithm is improved, the accuracy of the compensation data of the display panel formed according to the mura data and the existing compensation algorithm is improved, so that the mura compensation precision of the display panel is improved, and the brightness uniformity of the display panel is improved.
It should be noted that the mura compensation data corresponding to different gray levels are different. The compensation data obtained in the above step may include compensation data corresponding to a preset gray scale of the display panel. The preset gray scale may include all gray scales of the display panel, and the compensation data includes compensation data of all gray scales of the display panel. The preset gray scale may also include a part of gray scale of the display panel, and the compensation data includes compensation data of the part of gray scale of the display panel. Since the gray scale and the display brightness of the display panel have a corresponding relationship, the compensation data of other gray scales can be obtained by interpolation or fitting.
According to the technical scheme, a functional relation model for acquiring the exposure time of the display brightness of the display panel and the gray scale and brightness of the display panel is established, then the display brightness of the display panel at the preset gray scale is obtained, the exposure time corresponding to the preset gray scale of the display panel is calculated based on the functional relation model, the exposure time is adopted to expose the display panel to obtain the optical brightness of the display panel, and the compensation data of the display panel are obtained according to the optical brightness. When the exposure time corresponding to the preset gray scale of the display panel calculated based on the functional relation model is used for obtaining the optical brightness of the display panel, the exposure time corresponding to the preset gray scale can be adjusted according to the display brightness of the display panel instead of setting the exposure time as a fixed value. Therefore, the exposure time can be closer to the exposure time corresponding to the actual brightness value of the display panel, the difference between the optical brightness of the display panel and the actual brightness value of the display panel caused by the exposure time is reduced, the optical brightness of the display panel is closer to the actual brightness value, namely, the accuracy of the brightness data extracted by the display panel is improved, the accuracy of the mura data of the display panel identified according to the existing correlation algorithm is improved, the accuracy of the compensation data of the display panel formed according to the mura data and the existing compensation algorithm is improved, the mura compensation accuracy of the display panel is improved, and the brightness uniformity of the display panel is improved.
On the basis of the technical scheme, the method for obtaining the optical brightness of the display panel by exposing the display panel with the exposure time comprises the following steps:
and exposing the display panel by adopting the exposure time to obtain the picture brightness data of the display panel.
Specifically, different exposure times may be required to acquire the brightness of different display panels. And after the exposure time of the display panel is determined, photographing the display panel by adopting the exposure time to acquire gray scale picture brightness data of the display panel. The gray scale input by the function relation model when calculating the exposure time and the gray scale in the gray scale picture of the display panel can be the same gray scale. If the image brightness data of a plurality of gray scales of the display panel needs to be acquired, the exposure time of the display panel can be adjusted according to the gray scales, and therefore the image brightness data corresponding to the gray scales are acquired.
The optical brightness of each pixel in the display panel is calculated according to the picture brightness data of the display panel.
Specifically, the color distribution characteristics of the pixels in the picture of the display panel can be analyzed according to the picture brightness data of the display panel, and the display brightness of each pixel is calculated according to a correlation algorithm.
Fig. 2 is a flowchart of another compensation method for a display panel according to an embodiment of the present invention. As shown in fig. 2, the method includes:
s210, acquiring exposure time of a plurality of display panels when the display brightness of the display panels is acquired under a specific gray scale, wherein the specific gray scale, the display brightness and the exposure time are used as a sample set.
In particular, the several display panels may be display panels of the same model, for example, display panels of the same model produced for the same batch or different batches. The display brightness of the display panels under the specific gray scale is different, and the corresponding exposure time is different. The display brightness and the exposure time of each display panel under the specific gray scale are used as a sample, and a sample set formed by the display brightness and the exposure time of a plurality of display panels under the specific gray scale forms the sample set of the specific gray scale, the display brightness and the exposure time of the display panels. The specific gray scale may be a preset gray scale of the display panel, for example, when the display panel includes a gray scale of 0-255, the specific gray scale may be any one of the gray scales of 0-255. The specific gray levels of different display panels may be the same. In addition, the larger the number of the plurality of display panels is, the more samples in the sample set are, and the more accurate the functional relationship model obtained in the subsequent training is.
S220, training the sample set by taking the specific gray scale and the display brightness as input parameters and the exposure time as output parameters, and establishing a functional relation model for acquiring the exposure time of the display brightness of the display panel and the gray scale and the brightness of the display panel.
In particular, the sample set is divided into an input sample set and an output sample set. Wherein the specific gray scale and display brightness are used as input sample set, and the exposure time is used as output sample set. By training the input sample set and the output sample set, a functional relation model of the exposure time for acquiring the display brightness of the display panel and the gray scale and the brightness of the display panel can be obtained, and the establishment of the functional relation model of the exposure time for acquiring the display brightness of the display panel and the gray scale and the brightness of the display panel is completed.
Illustratively, training a sample set includes: the sample set is trained by a neural network algorithm.
Specifically, the neural network algorithm has self-learning capability, and the obtained functional relationship model can have self-learning capability by training the sample set through the neural network algorithm. When the display brightness and the gray scale of the display panel are input to the functional relation model, the corresponding exposure time can be calculated through the self-learning capability of the functional relation model. In addition, the neural network algorithm also has high-speed solving capability, so that the functional relation model can solve the exposure time at high speed, and the calculation rate of the functional relation model can be improved.
S230, obtaining the display brightness of the display panel at the preset gray scale, and calculating the exposure time of the display panel at the preset gray scale based on the functional relation model.
And S240, exposing the display panel by adopting the exposure time to acquire the optical brightness of the display panel.
And S250, acquiring compensation data of the display panel according to the optical brightness.
The embodiment of the invention also provides a compensation device of the display panel. Fig. 3 is a schematic structural diagram of a compensation apparatus of a display panel according to an embodiment of the present invention. As shown in fig. 3, the compensating device includes:
and the exposure time function model establishing module 10 is used for establishing a function relation model of the exposure time for acquiring the display brightness of the display panel and the gray scale and the brightness of the display panel.
The exposure time calculation module 20 is configured to obtain display brightness of the display panel at a preset gray scale, and calculate an exposure time corresponding to the preset gray scale of the display panel based on the functional relationship model.
And an optical brightness obtaining module 30, configured to obtain the optical brightness of the display panel by exposing the display panel with the exposure time.
And the compensation data acquisition module 40 is used for acquiring compensation data of the display panel according to the optical brightness.
According to the technical scheme of the embodiment, a functional relation model for acquiring the exposure time of the display brightness of the display panel and the gray scale and brightness of the display panel is established through the exposure time function model establishing module, the display brightness of the display panel at the preset gray scale is obtained through the exposure time calculating module, and the exposure time corresponding to the preset gray scale of the display panel is calculated based on the functional relation model. And finally, acquiring compensation data of the display panel according to the optical brightness through the compensation data acquisition module. When the exposure time calculation module calculates based on the functional relation model, the exposure time corresponding to the preset gray scale can be adjusted according to the display brightness of the display panel instead of setting the exposure time as a fixed value. Therefore, the exposure time can be closer to the exposure time corresponding to the actual brightness value of the display panel, the difference between the optical brightness of the display panel and the actual brightness value of the display panel caused by the exposure time is reduced, the optical brightness of the display panel is closer to the actual brightness value, namely, the accuracy of the brightness data extracted by the display panel is improved, the accuracy of the mura data of the display panel identified according to the existing correlation algorithm is improved, the accuracy of the compensation data of the display panel formed according to the mura data and the existing compensation algorithm is improved, the mura compensation accuracy of the display panel is improved, and the brightness uniformity of the display panel is improved.
On the basis of the above technical solution, the compensation device may further include a brightness compensation module for compensating the display brightness of the display panel according to the compensation data.
The exposure time function modeling module may include:
the system comprises a sample set acquisition module, a data acquisition module and a data processing module, wherein the sample set acquisition module is used for acquiring the exposure time of a plurality of display panels when the display brightness of the display panels is acquired under a specific gray scale, and the specific gray scale, the display brightness and the exposure time are used as a sample set;
and the training module is used for training the sample set by taking the specific gray scale and the display brightness as input parameters and the exposure time as output parameters, and establishing a function model of the exposure time.
The optical brightness acquisition module may include:
the image brightness data acquisition module is used for exposing the display panel by adopting the exposure time to obtain image brightness data of the display panel;
and the brightness calculation module is used for calculating the optical brightness of each pixel in the display panel according to the picture brightness data of the display panel.
The embodiment of the invention also provides a display panel. Fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present invention. As shown in fig. 4, the display panel 100 includes a storage device 101, and the storage device 101 stores compensation data of the display panel obtained by the compensation method of the display panel according to any embodiment of the present invention. When the display panel 100 displays, the driving chip 102 of the display panel 100 obtains the compensation data of the display panel 100 from the storage device 101, and sums the compensation data with the driving data to obtain the driving signal for the display panel 100 to drive the pixels to emit light. Since the accuracy of the compensation data is relatively high, the mura compensation accuracy of the display panel 100 can be improved, and the brightness uniformity of the display panel 100 is further improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A compensation method for a display panel, comprising:
establishing a functional relation model for acquiring the exposure time of the display brightness of the display panel and the gray scale and the brightness of the display panel;
acquiring the display brightness of a display panel at a preset gray scale, and calculating the exposure time of the display panel at the preset gray scale based on the functional relation model;
exposing the display panel by adopting the exposure time to obtain the optical brightness of the display panel;
and acquiring compensation data of the display panel according to the optical brightness.
2. The method of claim 1, wherein modeling exposure time for capturing display brightness of a display panel as a function of gray scale and brightness of the display panel comprises:
acquiring exposure time of a plurality of display panels when the display brightness of the display panels is acquired under a specific gray scale, wherein the specific gray scale, the display brightness and the exposure time are used as a sample set;
and training the sample set by taking the specific gray scale and the display brightness as input parameters and the exposure time as output parameters, and establishing a functional relation model for acquiring the exposure time of the display brightness of the display panel and the gray scale and the brightness of the display panel.
3. The method of claim 2, wherein training the sample set comprises:
training the sample set through a neural network algorithm.
4. The method of claim 1, further comprising, after obtaining compensation data for the display panel based on the optical brightness:
and compensating the optical brightness of the display panel according to the compensation data.
5. The method of claim 1, wherein exposing the display panel with the exposure time to obtain the optical brightness of the display panel comprises:
exposing the display panel by adopting the exposure time to obtain the image brightness data of the display panel;
and calculating the optical brightness of each pixel in the display panel according to the picture brightness data of the display panel.
6. A compensation apparatus for a display panel, comprising:
the exposure time function model establishing module is used for establishing a function relation model of the exposure time for acquiring the display brightness of the display panel and the gray scale and the brightness of the display panel;
the exposure time calculation module is used for acquiring the display brightness of the display panel at a preset gray scale and calculating the exposure time of the display panel at the preset gray scale based on the functional relation model;
the optical brightness acquisition module is used for exposing the display panel by adopting the exposure time to acquire the optical brightness of the display panel;
and the compensation data acquisition module is used for acquiring the compensation data of the display panel according to the optical brightness.
7. The compensation apparatus as claimed in claim 6, wherein the function model establishing module for the exposure time comprises:
the system comprises a sample set acquisition module, a display brightness acquisition module and a display brightness acquisition module, wherein the sample set acquisition module is used for acquiring the exposure time of a plurality of display panels when the display brightness of the display panels is acquired under a specific gray scale, and the specific gray scale, the display brightness and the exposure time are used as a sample set;
and the training module is used for training the sample set by taking the specific gray scale and the display brightness as input parameters and taking the exposure time as an output parameter to establish a function model of the exposure time.
8. The compensation device for a display panel according to claim 6, further comprising:
and the brightness compensation module is used for compensating the display brightness of the display panel according to the compensation data.
9. The compensation device for a display panel according to claim 6, wherein the optical brightness obtaining module comprises:
the image brightness data acquisition module is used for exposing the display panel by adopting the exposure time to acquire image brightness data of the display panel;
and the brightness calculation module is used for calculating the optical brightness of each pixel in the display panel according to the image brightness data of the display panel.
10. A display panel comprising a storage device, wherein the storage device stores compensation data of the display panel obtained by the compensation method of the display panel according to any one of claims 1 to 5.
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