CN113870811B - Display device, brightness adjusting method and device thereof, electronic equipment and storage medium - Google Patents
Display device, brightness adjusting method and device thereof, electronic equipment and storage medium 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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
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- G—PHYSICS
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- 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
Abstract
The embodiment of the invention discloses a display device, a brightness adjusting method and device thereof, electronic equipment and a storage medium, wherein the display device comprises a plurality of pixel points and a memory, and the brightness adjusting method comprises the following steps: for each pixel point, acquiring a gray scale offset data set of the pixel point under m specific gray scale pictures and storing the gray scale offset data set into a memory, wherein the gray scale offset data set comprises m first gray scale offset data, and m is larger than 2; when a target gray scale picture is displayed, second gray scale offset data of the pixel points under the target gray scale picture are calculated according to the gray scale offset data set of the pixel points; and compensating the gray scale of the pixel point under the target gray scale picture according to the second gray scale offset data. In the embodiment of the invention, the gray scale compensation of each pixel point is dynamically realized, the uniformity of a multi-gray scale picture can be considered, the multi-gray scale integral optical compensation uniformity effect of a product is improved, the display uniformity is improved after compensation, and the method is suitable for the gray scale compensation of the pixel points on any gray scale picture.
Description
Technical Field
Embodiments of the present invention relate to display technologies, and in particular, to a display device, a brightness adjusting method and device thereof, an electronic device, and a storage medium.
Background
In the production process of the display screen, because of materials, processes and the like, mura, which is the phenomenon that the image display brightness of partial products is uneven, spots with uneven brightness bring discomfort to vision, and generally only can be discarded or degraded. And Mura lines are eliminated through an advanced sub-pixel level optical imaging technology and a software algorithm, namely, the optical compensation Demura is realized, so that the display quality of the display screen can meet the requirement of the shipment specification of a panel factory, and the yield of the display screen in mass production is improved.
The display uniformity of the existing optical compensation is poor, so that a more accurate and effective optical compensation method is still required to be found, and the display uniformity is further improved.
Disclosure of Invention
The embodiment of the invention provides a display device, a brightness adjusting method and device thereof, electronic equipment and a storage medium, and aims to improve display uniformity.
The embodiment of the invention provides a brightness adjusting method of a display device, wherein the display device comprises a plurality of pixel points and a memory, and the brightness adjusting method comprises the following steps:
for each pixel point, acquiring a gray scale offset data set of the pixel point under m specific gray scale pictures and storing the gray scale offset data set into the memory, wherein the gray scale offset data set comprises m first gray scale offset data, and m is larger than 2;
when a target gray scale picture is displayed, second gray scale offset data of the pixel point under the target gray scale picture is calculated according to the gray scale offset data set of the pixel point;
and compensating the gray scale of the pixel point under the target gray scale picture according to the second gray scale offset data.
Based on the same inventive concept, an embodiment of the present invention further provides a brightness adjustment device of a display device, where the display device includes a plurality of pixel points and a memory, and the brightness adjustment device includes:
the offset data storage module is used for acquiring and storing a gray scale offset data set of each pixel point under m specific gray scale pictures to the storage, wherein the gray scale offset data set comprises m first gray scale offset data, and m is larger than 2;
the offset data calculation module is used for calculating second gray scale offset data of the pixel points under a target gray scale picture according to the gray scale offset data set of the pixel points when the target gray scale picture is displayed;
and the gray scale compensation module is used for compensating the gray scale of the pixel point under the target gray scale picture according to the second gray scale offset data.
Based on the same inventive concept, the embodiment of the invention also provides a display device, which comprises the brightness adjusting device.
Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, including:
one or more processors;
a storage device to store one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors implement the brightness adjustment method of the display device as described above.
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, which, when executed by a processor, implements the brightness adjustment method of the display apparatus as described above.
In the embodiment of the invention, a storage device stores a gray scale offset data set of each pixel point under m specific gray scale pictures, and when a target gray scale picture is displayed, second gray scale offset data of the pixel point under the target gray scale picture is calculated according to the gray scale offset data set of the pixel point; and compensating the gray scale of the pixel point under the target gray scale picture according to the second gray scale offset data. The second gray scale offset data is used for gray scale compensation of the pixel points, so that the accuracy of the offset data can be improved, the gray scale compensation of each pixel point is dynamically realized, the uniformity of multi-gray scale images can be considered, the integral Demrua uniformity effect of the multi-gray scale of a product is improved, the display uniformity is improved after compensation, and the method is suitable for gray scale compensation of the pixel points on any gray scale image.
Drawings
To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description, although being some specific embodiments of the present invention, can be extended and extended to other structures and drawings by those skilled in the art according to the basic concepts of the device structure, the driving method and the manufacturing method disclosed and suggested by the various embodiments of the present invention, without making sure that these should be within the scope of the claims of the present invention.
Fig. 1 is a flowchart of a brightness adjustment method of a display device according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a brightness adjustment method for a display device according to another embodiment of the present invention;
FIG. 3 is a flowchart illustrating a brightness adjustment method for a display device according to another embodiment of the present invention;
fig. 4 is a schematic diagram of a brightness adjusting device of a display device according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a brightness adjusting device of another display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through embodiments with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the basic idea disclosed and suggested by the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, which is a flowchart of a brightness adjustment method of a display device according to an embodiment of the present invention, the technical solution of the embodiment is suitable for brightness adjustment of the display device. The brightness adjusting method can be executed by a brightness adjusting device, and the brightness adjusting device can be realized in a software and/or hardware mode and is configured to be executed in a display device. In this embodiment, the display device includes a plurality of pixels and a memory, and the memory may be any memory that can be integrated in the display device, such as a flash memory.
The brightness adjusting method of the display device provided by the embodiment specifically includes the following steps:
the method comprises the following steps of S1, for each pixel point, obtaining a gray scale offset data set of the pixel point under m specific gray scale pictures and storing the gray scale offset data set into a storage, wherein the gray scale offset data set comprises m first gray scale offset data, and m is larger than 2.
And S2, when the target gray scale picture is displayed, calculating second gray scale offset data of the pixel point under the target gray scale picture according to the gray scale offset data set of the pixel point.
And S3, compensating the gray scale of the pixel point under the target gray scale picture according to the second gray scale offset data.
It can be understood that, under the condition of determining the image gray scale, the corresponding brightness value of the gray scale image is theoretically a fixed value, and the corresponding theoretical brightness values of different gray scale images are different, so that the theoretical brightness value corresponding to a specific gray scale image is a known fixed value. As described above, the display device includes a plurality of pixels, and the brightness adjustment method of each pixel is consistent, and based on this, in this embodiment, only one pixel in the display device is taken as an example for explanation, and this example pixel is any one pixel in the display device. Before leaving the factory, a gray scale offset data set of each pixel point in the display device under m specific gray scale pictures is generated and stored in a memory, and the specific process is shown as follows.
The display device displays a frame of image with a specific gray scale, for example, the specific gray scale is 50 gray scales, the display device displays the frame of image with 50 gray scales, and the gray scale of the pixel point X1 in the image is 50. The theoretical brightness value corresponding to the 50 gray level picture is Lumi 50 In an ideal state, when the display device displays the frame of 50 gray-scale picture, the ideal brightness values of the pixel points X1 should be all Lumi 50 However, due to the material process, the picture display brightness unevenness (Mura) may occur on some products, and the actual brightness values of some pixels may not reach the theoretical brightness value Lumi 50 Based on this, the 50 gray scale of the pixel point X1 is adjusted to make the corresponding actual brightness value be the theoretical brightness value Lumi 50 Further, the first gray scale offset data of the pixel point X1 under the 50 gray scale image is obtained. If the actual brightness value of the pixel point X1 under the 50 gray scales is larger than Lumi 50 The gray level is turned down until the actual brightness value is reduced to Lumi 50 (ii) a Or, if the actual brightness value of the pixel point X1 under the 50 gray levels is less than Lumi 50 Adjust the gray level up until the actual brightness value increases to Lumi 50 (ii) a Or, if the actual brightness value of the pixel point X1 under the 50 gray levels is equal to Lumi 50 The gray scale is not adjusted. The adjusted actual brightness value is equal to Lumi 50 The gray scale difference obtained by subtracting 50 from the gray scale value is the first gray scale offset data D of the pixel point X1 under the 50 gray scale picture g50 The gray level offset data may be positive, negative or 0. By analogy, the first gray scale offset data D of the pixel point X1 under a plurality of specific gray scale pictures can be obtained g And its data, which is stored in the memory of the display device for subsequent use.
For example, m =6,m specific gray levels are 0, 50, 100, 150, 200 and 255 respectively, and the pixel point X1 is atThe gray scale offset data sets under the m specific gray scale pictures comprise D in the 0 gray scale picture g0 D in a picture of 50 gray levels g50 D in a 100-gray-scale picture g100 D in 150 gray level picture g150 D in a 200-gray level picture g200 And D in 255 gray level frame g255 . And storing the gray scale offset data set of the pixel point X1 under the m specific gray scale pictures into a memory.
It is understood that the related practitioner can reasonably set the specific gray scale and the number of the specific gray scales according to the product requirement, but not limited thereto. In addition, the theoretical brightness value corresponding to the specific gray scale frame should be a theoretical brightness interval, and the actual brightness value in the theoretical brightness interval is regarded as the actual brightness value equal to the theoretical brightness value.
It should be noted that the display device includes a display area provided with pixels and a non-display area located at the periphery of the display area, the non-display area is provided with a source driver circuit and a display driver module, and a programmable Gamma buffer chip (P-Gamma IC) is integrated in the display driver module. In the gray scale brightness control scheme of the display device, a P-Gamma IC generates reference voltage and provides the reference voltage to a source electrode driving circuit, each gray scale voltage value is generated inside the source electrode driving circuit through resistance voltage division and other processing, a display driving module inputs a pixel voltage digital signal of each pixel point in a picture to be displayed to the source electrode driving circuit, and the source electrode driving circuit selects to output required gray scale voltage to each pixel point according to the decoded pixel voltage digital signal to realize the display of the required gray scale picture.
Before leaving the factory, a gray scale offset data set of each pixel point in the display device under m specific gray scale pictures is stored in the memory.
And a target gray scale image pre-display stage, namely, when the display device is to display the frame of target gray scale image, determining the initial gray scale of the pixel point X1, at this moment, the display device extracts a gray scale offset data set of the pixel point X1 from the memory, and calculates second gray scale offset data of the pixel point X1 under the target gray scale image according to m first gray scale offset data in the gray scale data offset set. The gray scale compensation is to superimpose the second gray scale offset data with the initial gray scale of the pixel point X1 to obtain the adjusted gray scale of the pixel point X1.
And in the target gray scale image display stage, the adjusted gray scale of the pixel point X1 corresponding to the target gray scale image is determined, and when the display device displays the frame of target gray scale image, the gray scale of the pixel point X1 is controlled to be the adjusted gray scale. For example, if the target gray scale picture is a 60 gray scale picture, the initial gray scale of the pixel point X1 is 60; if the calculated second gray scale offset data of the pixel point X1 is-3, the adjusted gray scale of the pixel point X1 is (-3) +60. When the display device displays a frame of 60-gray-scale picture, the gray scale of the pixel point X1 is controlled to be 57.
The brightness-gray scale relation, namely the Gamma Curve, in the display device is a nonlinear power change Curve, m first gray scale offset data of a pixel point X1 are used as reference gray scale offset data, second gray scale offset data of the pixel point X1 under a target gray scale picture is calculated, gray scale compensation of the pixel point X1 is performed by the second gray scale offset data, the accuracy of the offset data can be improved, and gray scale compensation of each pixel point is dynamically realized.
It can be understood that, for the case that the target gray scale image of the pixel point X1 is the same as one of the specific gray scale images, it is known that the first gray scale offset data of the pixel point X1 under the ith specific gray scale image is stored in the memory in advance, and then when the ith specific gray scale image is displayed, the gray scale of the pixel point X1 is compensated according to the first gray scale offset data of the pixel point X1 under the ith specific gray scale image stored in the memory. That is, when the target gray scale picture of the pixel point X1 is the same as one of the specific gray scale pictures, the first gray scale offset data of the pixel point X1 in the ith specific gray scale picture, which is pre-stored in the memory, is used as the second gray scale offset data of the pixel point X1 in the target gray scale picture, so as to compensate the gray scale of the pixel point X1.
In the embodiment of the invention, a storage device stores a gray scale offset data set of each pixel point under m specific gray scale pictures, and when a target gray scale picture is displayed, second gray scale offset data of the pixel point under the target gray scale picture is calculated according to the gray scale offset data set of the pixel point; and compensating the gray scale of the pixel point under the target gray scale picture according to the second gray scale offset data. The second gray scale offset data is used for gray scale compensation of the pixel points, so that the accuracy of the offset data can be improved, the gray scale compensation of each pixel point is dynamically realized, the uniformity of a multi-gray scale picture can be considered, the integral Demrua uniformity effect of the multi-gray scale of a product is improved, the display uniformity is improved after compensation, and the method is suitable for gray scale compensation of the pixel points on any gray scale picture.
Illustratively, on the basis of the above technical solution, for the operation of acquiring the gray scale offset data set of the pixel point under m specific gray scale frames in step S1, the method specifically includes the following steps as shown in fig. 2:
s11, adjusting a pixel point to be an ith specific gray scale, and collecting the brightness of the pixel point, wherein i is an integer less than or equal to m;
s12, adjusting the gray scale of the pixel point according to the target brightness corresponding to the ith specific gray scale to enable the brightness of the pixel point to be the target brightness corresponding to the ith specific gray scale;
s13, determining the difference value between the adjusted gray scale of the pixel point and the ith specific gray scale as first gray scale offset data of the pixel point under the ith specific gray scale picture.
Taking the 1 st specific gray scale image as an example, the initial gray scale of the pixel point X1 in the 1 st specific gray scale image is the 1 st specific gray scale. A display driving module of the display device inputs a 1 st pixel voltage digital signal of a pixel point X1 to a source electrode driving circuit, the 1 st pixel voltage digital signal comprises voltage information corresponding to a 1 st specific gray scale, and the source electrode driving circuit decodes the 1 st pixel voltage digital signal and then selects the voltage required by the 1 st specific gray scale to be output to the pixel point X1, so that the display of the pixel point X1 on a 1 st specific gray scale picture is realized.
After the display device displays the 1 st specific gray scale picture, the brightness tester collects the actual brightness value of the pixel point X1; the brightness tester determines the corresponding ideal brightness value, namely the target brightness, according to the 1 st specific gray scale, and detects the relation between the actual brightness value and the ideal brightness value. If the actual brightness value of the pixel point X1 is smaller than the ideal brightness value corresponding to the 1 st specific gray scale, driving a display driving module of the display device to increase the gray scale of the pixel point X1 until the actual brightness value is equal to the ideal brightness value; if the actual brightness value of the pixel point X1 is larger than the ideal brightness value corresponding to the 1 st specific gray scale, a display driving module of the display device is driven to reduce the gray scale of the pixel point X1 until the actual brightness value is equal to the ideal brightness value; if the actual brightness value of the pixel point X1 is equal to the ideal brightness value corresponding to the 1 st specific gray scale, the gray scale of the pixel point X1 is not adjusted.
And when the actual brightness value of the adjusted pixel point X1 is equal to the ideal brightness value corresponding to the 1 st specific gray scale, calculating the difference value between the adjusted gray scale of the pixel point X1 and the 1 st specific gray scale, and determining the gray scale difference value as first gray scale offset data of the pixel point X1 in the 1 st specific gray scale picture.
By analogy, the first gray scale offset data of the pixel point X1 under the ith specific gray scale picture is obtained through calculation, and a gray scale offset data set of the pixel point X1 under the m specific gray scale pictures is generated and stored in the memory.
In this embodiment, the first gray scale offset data of the pixel point X1 under m specific gray scale pictures is used as the reference gray scale data offset, and is commonly used for gray scale compensation displayed by the pixel point X1 on other gray scale pictures, so that the uniformity of gray scale compensation can be improved.
For example, on the basis of the above technical solution, the operation of calculating the second gray scale offset data of the pixel point in the target gray scale image in step S2 specifically includes the following steps as shown in fig. 3:
s21, calculating the gray scale weight of the ith specific gray scale of the pixel point influencing the target gray scale, wherein i is an integer less than or equal to m;
s22, calculating to obtain second gray scale offset data of the pixel point under the target gray scale picture according to the first gray scale offset data and the gray scale weight of the pixel point under each specific gray scale.
In this embodiment, at the pre-display stage of the target gray scale image, the 1 st gray scale weight p1 of the pixel point X1 where the 1 st specific gray scale affects the target gray scale, the 2 nd gray scale weight p2 of the 2 nd specific gray scale affects the target gray scale, …, the i th specific gray scale weight pi, … of the i th specific gray scale affects the i th gray scale weight pm of the target gray scale are sequentially calculated, so as to obtain m gray scale weight coefficients affecting the target gray scale of the pixel point X1. And calculating the offset data for gray scale compensation of the pixel point X1 with gray scale weight coefficient weighting under each specific gray scale, and jointly calculating the second gray scale offset data of the pixel point X1.
And in the target gray scale picture display stage, gray scale compensation of the pixel point X1 is performed by using the second gray scale offset data. Therefore, the accuracy of the offset data can be improved, the gray scale compensation of the pixel points under different gray scale pictures is dynamically realized, and the display uniformity is improved after the compensation.
The calculation formula of the selectable gray scale weight is shown as formula 1, wherein formula 1:
wherein pi is the gray scale weight of the ith specific gray scale affecting the target gray scale gray0, and gray scale j is the jth specific gray scale. The denominator in formula 1 is the sum of the absolute values of the differences between the m specific gray scales of the pixel point X1 and the target gray scale.
For example, the m =6,m specific gray levels include the 1 st specific gray level (gray 1= 0), the 2 nd specific gray level (gray 2= 50), the 3 rd specific gray level (gray 3= 100), the 4 th specific gray level (gray 4= 150), the 5 th specific gray level (gray 5= 200), and the 6 th specific gray level (gray 6= 255). The target gray scale of the pixel point X1 on the target gray scale screen is 60, i.e. gray0=60, and the gamma coefficient is set to 2.2.
The gray scale weight of each specific gray scale affecting the target gray scale is calculated as follows:
It can be seen that the gray scale weight of the specific gray scale close to the target gray scale affecting the target gray scale is larger, and the gray scale weight of the specific gray scale far from the target gray scale affecting the target gray scale is smaller.
The calculation formula of the second gray scale offset data of the selectable pixel point under the target gray scale picture is shown as formula 2, wherein formula 2 is as follows:
wherein, offset0 is the second gray scale offset data of the pixel point under the target gray scale picture, offset1 is the first gray scale offset data of the pixel point under the 1 st specific gray scale picture, p1 is the gray scale weight of the 1 st specific gray scale influencing the target gray scale, offset2 is the first gray scale offset data of the pixel point under the 2 nd specific gray scale picture, p2 is the gray scale weight of the 2 nd specific gray scale influencing the target gray scale, offset is the first gray scale offset data of the pixel point under the i th specific gray scale picture, pi is the gray scale weight of the i th specific gray scale influencing the target gray scale, offset m is the first gray scale offset data of the pixel point under the m th specific gray scale picture, and pm is the gray scale weight of the m specific gray scale influencing the target gray scale.
Taking m =6 as an example, given that each specific gray scale of the pixel point X1 affects the gray scale weights p1 to p6 of the target gray scale, the memory of the display device further stores the gray scale offset data set of the pixel point X1 under 6 specific gray scale pictures, and the offset data for gray scale compensation with the weighted gray scale weight coefficient, i.e. the second gray scale offset data, is calculated accordingly.
In this embodiment, the algorithm may be implemented by a multiplier circuit, the multiplier circuit may be stored in a memory, and the second gray scale offset data of the pixel point X1 may be obtained by calculating by calling the gray scale offset data set of the pixel point X1 in the memory and the multiplier circuit when displaying. In the embodiment, before the pre-display of different gray scale images, the offset data for gray scale compensation with gray scale weight coefficient weighting is calculated by adopting a formula in a combined manner in a dynamic self-adaptive manner, so that the defect that the offset data for optical compensation in the prior art cannot give consideration to the uniformity of multiple gray scale images can be overcome, the uniformity effect of the multiple gray scale integral optical compensation Demrua of a product can be improved, and the gray scale brightness adjusting method can be generally applied to the display of any one gray scale image of the display device.
Based on the same inventive concept, an embodiment of the present invention further provides a brightness adjustment device of a display device, where the display device includes a plurality of pixels and a memory, and the brightness adjustment device can execute the brightness adjustment method described in any of the above embodiments, and the brightness adjustment device can be implemented in a software and/or hardware manner and configured to be executed in the display device.
As shown in fig. 4, the brightness adjusting apparatus of the display apparatus provided in this embodiment includes: an offset data storage module 110, an offset data calculation module 120 and a gray scale compensation module 130; the offset data storage module 110 is configured to, for each pixel point, obtain a gray scale offset data set of the pixel point under m specific gray scale frames and store the gray scale offset data set to a memory, where the gray scale offset data set includes m first gray scale offset data, and m is greater than 2; the offset data calculation module 120 is configured to calculate, when a target gray scale picture is displayed, second gray scale offset data of a pixel point in the target gray scale picture according to a gray scale offset data set of the pixel point; the gray scale compensation module 130 is configured to compensate the gray scale of the pixel point under the target gray scale frame according to the second gray scale offset data.
The optional offset data storage module 110 shown in fig. 5 includes: the brightness acquisition unit 111 is used for adjusting the pixel point to be the ith specific gray scale and acquiring the brightness of the pixel point, wherein i is an integer less than or equal to m; a brightness adjusting unit 112, configured to adjust a gray scale of the pixel point according to a target brightness corresponding to the ith specific gray scale so that the brightness of the pixel point is the target brightness corresponding to the ith specific gray scale; the gray scale storage unit 113 is configured to determine a difference between the adjusted gray scale of the pixel point and the ith specific gray scale as first gray scale offset data of the pixel point in the ith specific gray scale frame.
The optional offset data calculation module 120, as shown in FIG. 5, includes: a weight calculating unit 121, configured to calculate a gray scale weight of an ith specific gray scale affecting a target gray scale of a pixel point, where i is an integer less than or equal to m; the offset calculating unit 122 is configured to calculate second gray scale offset data of the pixel point in the target gray scale frame according to the first gray scale offset data and the gray scale weight of the pixel point in each specific gray scale.
The calculation formula of the selectable gray scale weight is shown as formula 1, wherein formula 1:
wherein pi is the gray scale weight of the ith specific gray scale affecting the target gray scale gray0, and gray scale j is the jth specific gray scale.
The calculation formula of the second gray scale offset data of the selectable pixel point under the target gray scale picture is shown as formula 2, wherein formula 2 is as follows:
wherein, offset0 is the second gray scale offset data of the pixel point under the target gray scale picture, offset1 is the first gray scale offset data of the pixel point under the 1 st specific gray scale picture, p1 is the gray scale weight of the 1 st specific gray scale influencing the target gray scale, offset2 is the first gray scale offset data of the pixel point under the 2 nd specific gray scale picture, p2 is the gray scale weight of the 2 nd specific gray scale influencing the target gray scale, offset is the first gray scale offset data of the pixel point under the i th specific gray scale picture, pi is the gray scale weight of the i th specific gray scale influencing the target gray scale, offset m is the first gray scale offset data of the pixel point under the m th specific gray scale picture, and pm is the gray scale weight of the m specific gray scale influencing the target gray scale.
The selectable gray scale compensation module 130 is further configured to compensate gray scales of pixel points according to first gray scale offset data of the pixel points stored in the memory in the ith specific gray scale image when the ith specific gray scale image is displayed.
As described above, the offset data storage module 110 is an offset data storage program executed before factory shipment, and is implemented by the display driver module of the display device, the luminance tester and the memory, wherein the display driver module adjusts gray scales of pixel points, the luminance tester collects luminance of pixel points, the memory stores a set of offsets of single gray scale data evaluated on a plurality of specific gray scales (gray 1, gray2, gray3, …), and the selectable memory is NOR/NAND Flash.
The offset data calculating module 120 is an offset data calculating program executed before pre-display, and is implemented by a display driving module, a memory, and a multiplier circuit of the display device, wherein the display driving module drives a pixel to display a target gray scale picture, the memory stores a gray scale offset data set of the pixel, and the multiplier circuit calculates second gray scale offset data of the pixel under the target gray scale picture.
The gray scale compensation module 130 is a gray scale compensation program executed before display, and is implemented by a display driving module of the display device and a multiplier circuit, wherein the display driving module acquires second gray scale offset data of a pixel point through the multiplier circuit, so as to compensate a gray scale of the pixel point under a target gray scale picture.
In the embodiment of the invention, a storage device stores a gray scale offset data set of each pixel point under m specific gray scale pictures, and when a target gray scale picture is displayed, second gray scale offset data of the pixel point under the target gray scale picture is calculated according to the gray scale offset data set of the pixel point; and compensating the gray scale of the pixel point under the target gray scale picture according to the second gray scale offset data. The second gray scale offset data is used for gray scale compensation of the pixel points, so that the accuracy of the offset data can be improved, the gray scale compensation of each pixel point is dynamically realized, the uniformity of multi-gray scale images can be considered, the integral Demrua uniformity effect of the multi-gray scale of a product is improved, the display uniformity is improved after compensation, and the method is suitable for gray scale compensation of the pixel points on any gray scale image.
Based on the same inventive concept, the embodiment of the present invention further provides a display device, which includes a plurality of pixel points and a memory, and further includes the brightness adjustment device according to any of the above embodiments. The optional display device is an organic light emitting display, a liquid crystal display or a display using a cathode ray tube, but is not limited to the display device. The optical compensation Demura scheme provided by the embodiment of the invention can give consideration to multi-gray-scale image display, and improve the integral optical compensation uniformity effect of the product gray scale, thereby improving the display uniformity.
An embodiment of the present invention further provides an electronic device, which includes one or more processors and a storage device, where the storage device is configured to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors are enabled to implement the brightness adjustment method of the display device according to any of the above embodiments. The optional electronic device further comprises input means and output means, wherein the processor, the storage means, the input means and the output means of the electronic device may be connected via a bus or other means.
The storage device, i.e., the memory, is used as a computer-readable storage medium for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the brightness adjustment method of the display device in the embodiment of the present invention. The processor executes various functional applications and data processing of the electronic device by running the software programs, instructions and modules stored in the storage device, that is, the brightness adjustment method of the display device provided by the embodiment of the invention is realized.
The storage device can mainly comprise a storage program area and a storage data area, wherein the storage program area can store an operating system and an application program required by at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the storage device may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the storage device may further include memory located remotely from the processor, which may be connected to the electronic device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic device, and may include a keyboard, a mouse, and the like. The output device may include a display device such as a display screen.
The present embodiment also provides a computer-readable storage medium, on which a computer program, i.e., computer-executable instructions, is stored, and when the program is executed by a processor, the program is used to implement the brightness adjustment method of the display device provided by the embodiment of the present invention.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the method operations described above, and may also perform related operations in the brightness adjustment method of the display device provided by any embodiments of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the above search apparatus, each included unit and module are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
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 modifications, rearrangements, combinations 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 (12)
1. A brightness adjustment method of a display device, wherein the display device comprises a plurality of pixel points and a memory, the brightness adjustment method comprising:
for each pixel point, acquiring a gray scale offset data set of the pixel point under m specific gray scale pictures and storing the gray scale offset data set into the memory, wherein the gray scale offset data set comprises m first gray scale offset data, and m is larger than 2;
when a target gray scale picture is displayed, calculating the gray scale weight of the target gray scale influenced by the ith specific gray scale of the pixel point according to the gray scale offset data set of the pixel point, wherein i is an integer less than or equal to m;
calculating to obtain second gray scale offset data of the pixel point under the target gray scale picture according to the first gray scale offset data and the gray scale weight of the pixel point under each specific gray scale;
compensating the gray scale of the pixel point under the target gray scale picture according to the second gray scale offset data;
the calculation formula of the gray scale weight is shown as formula 1, wherein formula 1 is as follows:
wherein pi is the gray scale weight of the ith specific gray scale affecting the target gray scale gray0, and gray scale j is the jth specific gray scale.
2. The method of claim 1, wherein obtaining a gray level shift data set of the pixel points under m specific gray level frames comprises:
adjusting the pixel point to be an ith specific gray scale, and collecting the brightness of the pixel point, wherein i is an integer less than or equal to m;
adjusting the gray scale of the pixel point according to the target brightness corresponding to the ith specific gray scale so that the brightness of the pixel point is the target brightness corresponding to the ith specific gray scale;
and determining the difference value between the adjusted gray scale of the pixel point and the ith specific gray scale as first gray scale offset data of the pixel point under the ith specific gray scale picture.
3. The method of claim 1, wherein a formula for calculating the second gray level offset data of the pixel point in the target gray level image is shown in formula 2, wherein formula 2 is:
wherein, offset0 is the second gray scale offset data of the pixel point under the target gray scale picture, offset1 is the first gray scale offset data of the pixel point under the 1 st specific gray scale picture, p1 is the gray scale weight that the 1 st specific gray scale influences the target gray scale, offset2 is the first gray scale offset data of the pixel point under the 2 nd specific gray scale picture, p2 is the gray scale weight that the 2 nd specific gray scale influences the target gray scale, offset is the first gray scale offset data of the pixel point under the i th specific gray scale picture, pi is the gray scale weight that the i th specific gray scale influences the target gray scale, offset is the first gray scale offset data of the pixel point under the m th specific gray scale picture, and pm is the gray scale weight that the m th specific gray scale influences the target gray scale.
4. The luminance adjustment method according to claim 1, further comprising: when an ith specific gray scale picture is displayed, compensating the gray scale of the pixel point according to first gray scale offset data of the pixel point stored in the memory under the ith specific gray scale picture.
5. A luminance adjusting apparatus of a display apparatus, the display apparatus including a plurality of pixel points and a memory, the luminance adjusting apparatus comprising:
the offset data storage module is used for acquiring and storing a gray scale offset data set of each pixel point under m specific gray scale pictures to the storage, wherein the gray scale offset data set comprises m first gray scale offset data, and m is larger than 2;
the offset data calculation module is used for calculating gray scale weight of the pixel point, which influences a target gray scale, according to a gray scale offset data set of the pixel point when a target gray scale picture is displayed, and calculating second gray scale offset data of the pixel point under the target gray scale picture according to first gray scale offset data and gray scale weight of the pixel point under each specific gray scale, wherein i is an integer less than or equal to m;
the gray scale compensation module is used for compensating the gray scale of the pixel point under the target gray scale picture according to the second gray scale offset data;
the calculation formula of the gray scale weight is shown as formula 1, wherein formula 1 is as follows:
wherein pi is the gray scale weight of the ith specific gray scale affecting the target gray scale gray0, and gray scale j is the jth specific gray scale.
6. The luminance adjustment device according to claim 5, wherein the offset data storage block comprises:
the brightness acquisition unit is used for adjusting the pixel point to be an ith specific gray scale and acquiring the brightness of the pixel point, wherein i is an integer less than or equal to m;
the brightness adjusting unit is used for adjusting the gray scale of the pixel point according to the target brightness corresponding to the ith specific gray scale so that the brightness of the pixel point is the target brightness corresponding to the ith specific gray scale;
and the gray scale storage unit is used for determining the difference value between the adjusted gray scale of the pixel point and the ith specific gray scale as first gray scale offset data of the pixel point under the ith specific gray scale picture.
7. The apparatus of claim 5, wherein a calculation formula of the second gray level offset data of the pixel point in the target gray level frame is shown in formula 2, wherein formula 2 is:
wherein, offset0 is the second gray scale offset data of the pixel point under the target gray scale picture, offset1 is the first gray scale offset data of the pixel point under the 1 st specific gray scale picture, p1 is the gray scale weight that the 1 st specific gray scale influences the target gray scale, offset2 is the first gray scale offset data of the pixel point under the 2 nd specific gray scale picture, p2 is the gray scale weight that the 2 nd specific gray scale influences the target gray scale, offset is the first gray scale offset data of the pixel point under the i th specific gray scale picture, pi is the gray scale weight that the i th specific gray scale influences the target gray scale, offset is the first gray scale offset data of the pixel point under the m th specific gray scale picture, and pm is the gray scale weight that the m th specific gray scale influences the target gray scale.
8. The apparatus of claim 5, wherein the gray scale compensation module is further configured to compensate the gray scale of the pixel point according to the first gray scale offset data of the pixel point stored in the memory under the ith specific gray scale image when the ith specific gray scale image is displayed.
9. A display device comprising a brightness adjustment device according to any one of claims 5 to 8.
10. The display device according to claim 9, wherein the display device is an organic light emitting display, a liquid crystal display, or a display using a cathode ray tube.
11. An electronic device, comprising:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement the brightness adjustment method for the display apparatus according to any one of claims 1 to 4.
12. A computer-readable storage medium on which a computer program is stored, the program, when being executed by a processor, implementing a brightness adjustment method of a display device according to any one of claims 1 to 4.
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