CN113096575B - Service life compensation method and device of display device and display device - Google Patents
Service life compensation method and device of display device and display device Download PDFInfo
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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Abstract
The invention provides a service life compensation method and device of a display device and the display device, and relates to the technical field of display. Wherein the method comprises the following steps: detecting a driving current value when each pixel area displays a preset test picture respectively; determining a correction parameter of each pixel region according to the driving current value and the initial current value; determining an aging parameter of each pixel region; determining a target gray scale value of the pixel region according to the aging parameter and the correction parameter of the pixel region; and carrying out service life compensation according to the target gray scale value of the pixel area. In the invention, for any pixel area, a correction parameter can be determined based on the current driving current and the pre-stored initial current, and the gray scale value of the pixel area is corrected by the correction parameter to obtain the target gray scale value. The service life of the pixel area is compensated according to the corrected target gray scale value, so that the difference between the target gray scale value and the gray scale compensation amount actually required can be reduced, the influence of external interference is reduced, and the service life compensation effect is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a lifetime compensation method and apparatus for a display device, and a display device.
Background
The lifetime compensation of the display device generally includes external compensation, de-burn in compensation, and the like, wherein the de-burn in compensation has significant advantages of easy implementation and low cost compared with other methods, and thus is widely used.
In the de-burn in compensation mode, the aging degree of the display device can be calculated in an accumulated mode according to the record of the pixel display information and the life model of the display device through a life counting (data counting) mode, and then the pixel brightness is compensated based on the aging degree, so that the pixel brightness is not influenced by the attenuation of the luminous efficiency of the display device, and the life of the display device is prolonged.
However, in the de-burn in compensation method, the disturbance of external factors such as temperature will generally have an influence on the recording of the pixel display information, so that the calculated compensation amount and the actually required compensation amount are more and more different, resulting in poor effect of lifetime compensation.
Disclosure of Invention
The invention provides a life compensation method and device of a display device and the display device, and aims to solve the problem that the calculated compensation amount and the actually required compensation amount are larger and larger under the interference of external factors in the existing de-burn in compensation method, so that the effect of life compensation is poor.
In order to solve the above problems, the present invention discloses a lifetime compensation method of a display device, the method comprising:
Detecting a corresponding driving current value when each pixel area displays a preset test picture respectively; the display area is divided into a plurality of pixel areas, and the pixel areas comprise a plurality of sub-pixels;
Determining correction parameters of each pixel area according to each driving current value and a pre-stored initial current value corresponding to each pixel area;
determining an aging parameter of each pixel region;
For any pixel area, determining a target gray scale value of the pixel area according to the aging parameter and the correction parameter of the pixel area;
and for any pixel region, carrying out service life compensation on the pixel region according to the target gray scale value of the pixel region.
Optionally, detecting the driving current value corresponding to each pixel area when the preset test picture is displayed respectively includes:
When a service life compensation correction instruction is received, controlling a driving chip to supply power for the display device;
sequentially controlling each pixel area to display the preset test picture;
for any pixel region, when the preset test picture is displayed in the pixel region, detecting a driving current value of the pixel region through the driving chip.
Optionally, the determining the correction parameter of each pixel area according to each driving current value and a pre-stored initial current value corresponding to each pixel area includes:
For any pixel area, determining a correction parameter of the pixel area according to a driving current value corresponding to the pixel area and a pre-stored initial current value corresponding to the pixel area by the following formula;
B＝h*(I0-In)
the B is a correction parameter of the pixel area, h is a first preset constant, I 0 is an initial current value corresponding to the pixel area, and I n is a driving current value corresponding to the pixel area.
Optionally, for any one of the pixel areas, determining the target gray-scale value of the pixel area according to the aging parameter and the correction parameter of the pixel area includes:
For any pixel region, determining a target gray scale value of the pixel region according to the aging parameter and the correction parameter of the pixel region by the following formula;
Lx＝m*(1+A)*(1+B)*L0
the L x is a target gray-scale value of the pixel area, the m is a second preset constant, the a is an aging parameter of the pixel area, the B is a correction parameter of the pixel area, and the L 0 is a gray-scale value to be displayed of the pixel area.
Optionally, the preset test picture includes a white test picture.
Optionally, the preset test picture further includes at least one of a red test picture, a green test picture, and a blue test picture.
Optionally, for any one of the pixel areas, performing lifetime compensation on the pixel area according to the target gray scale value of the pixel area, including at least one of the following steps:
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the red test picture; according to the adjusted target gray scale value, compensating the brightness of the red sub-pixel in the pixel area;
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the green test picture; according to the adjusted target gray scale value, compensating the brightness of the green sub-pixels in the pixel area;
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the blue test picture; and compensating the brightness of the blue sub-pixel in the pixel area according to the adjusted target gray scale value.
In order to solve the above problems, the present invention also discloses a lifetime compensation device of a display device, the device comprising:
The detection module is used for detecting a corresponding driving current value when each pixel area displays a preset test picture respectively; the display area is divided into a plurality of pixel areas, and the pixel areas comprise a plurality of sub-pixels;
The first determining module is used for determining correction parameters of each pixel area according to each driving current value and a pre-stored initial current value corresponding to each pixel area;
A second determining module, configured to determine an aging parameter of each pixel area;
the third determining module is used for determining a target gray scale value of any pixel area according to the aging parameter and the correction parameter of the pixel area;
And the compensation module is used for carrying out service life compensation on any pixel area according to the target gray scale value of the pixel area.
Optionally, the detection module includes:
The first control sub-module is used for controlling the driving chip to supply power for the display device when receiving the service life compensation correction instruction;
The second control submodule is used for sequentially controlling each pixel area to display the preset test picture;
And the detection submodule is used for detecting the driving current value of the pixel area through the driving chip when the preset test picture is displayed in the pixel area for any pixel area.
Optionally, the first determining module includes:
the first determining submodule is used for determining correction parameters of the pixel areas according to the driving current value corresponding to the pixel areas and the pre-stored initial current value corresponding to the pixel areas for any pixel area through the following formula;
B＝h*(I0-In)
the B is a correction parameter of the pixel area, h is a first preset constant, I 0 is an initial current value corresponding to the pixel area, and I n is a driving current value corresponding to the pixel area.
Optionally, the third determining module includes:
the second determining submodule is used for determining a target gray scale value of any pixel area according to the aging parameter and the correction parameter of the pixel area through the following formula;
Lx＝m*(1+A)*(1+B)*L0
the L x is a target gray-scale value of the pixel area, the m is a second preset constant, the a is an aging parameter of the pixel area, the B is a correction parameter of the pixel area, and the L 0 is a gray-scale value to be displayed of the pixel area.
Optionally, the preset test picture includes a white test picture.
Optionally, the preset test picture further includes at least one of a red test picture, a green test picture, and a blue test picture.
Optionally, the compensation module includes at least one of the following sub-modules:
The first compensation submodule is used for adjusting the target gray scale value determined by the pixel area corresponding to the white test picture according to the ageing parameter and the correction parameter determined by the pixel area corresponding to the red test picture for any pixel area; according to the adjusted target gray scale value, compensating the brightness of the red sub-pixel in the pixel area;
the second compensation submodule is used for adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the green test picture for any pixel region; according to the adjusted target gray scale value, compensating the brightness of the green sub-pixels in the pixel area;
The third compensation submodule is used for adjusting the target gray scale value determined by the pixel area corresponding to the white test picture according to the aging parameter and the correction parameter determined by the pixel area corresponding to the blue test picture for any pixel area; and compensating the brightness of the blue sub-pixel in the pixel area according to the adjusted target gray scale value.
In order to solve the above problems, the present invention also discloses a display device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, the computer program implementing the steps of the lifetime compensation method as described above when executed by the processor.
In order to solve the above-mentioned problems, the present invention also discloses a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the lifetime compensation method as described above.
Compared with the prior art, the invention has the following advantages:
In the embodiment of the invention, the corresponding driving current value when each pixel area displays the preset test picture can be detected first, wherein the display area is divided into a plurality of pixel areas, and the pixel areas comprise a plurality of sub-pixels. The correction parameters for each pixel region may then be determined based on each drive current value and the pre-stored initial current value corresponding to each pixel region. After determining the aging parameter of each pixel region, for any pixel region, determining the target gray scale value of the pixel region according to the aging parameter and the correction parameter of the pixel region, and finally performing life compensation on the pixel region according to the target gray scale value of the pixel region. In the embodiment of the invention, for any pixel area, a correction parameter can be determined based on the current driving current and the pre-stored initial current, and then the gray scale value of the pixel area is corrected through the correction parameter to obtain the target gray scale value. The service life of the pixel area is compensated according to the corrected target gray scale value, so that the difference between the target gray scale value and the gray scale compensation amount actually required can be reduced, the influence of external interference is reduced, and the service life compensation effect is improved.
Drawings
Fig. 1 is a flowchart showing steps of a lifetime compensation method of a display device according to a first embodiment of the present invention;
Fig. 2 is a block diagram showing a lifetime compensation device of a display device according to a second embodiment of the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
Fig. 1 is a flowchart showing steps of a lifetime compensation method of a display device according to a first embodiment of the present invention, the method including the steps of:
Step 101: detecting a corresponding driving current value when each pixel area displays a preset test picture respectively; the display area is divided into a plurality of pixel areas, and the pixel areas comprise a plurality of sub-pixels.
In the embodiment of the present invention, the display area of the display device may be divided into a plurality of pixel areas, each pixel area may include a plurality of pixel units, for example, 8×8 pixel units may be divided into one pixel area, so that each pixel area includes a plurality of sub-pixels.
When the display device is used for a certain period of time, a correction operation of lifetime compensation can be performed. Optionally, the step may be specifically implemented by the following manner, including:
When a service life compensation correction instruction is received, controlling a driving chip to supply power for the display device;
sequentially controlling each pixel area to display the preset test picture;
for any pixel region, when the preset test picture is displayed in the pixel region, detecting a driving current value of the pixel region through the driving chip.
In practical applications, the lifetime compensation correction command may be triggered automatically or manually, so that the display device may perform the correction operation when receiving the lifetime compensation correction command. Firstly, the display panel can be changed into a driving chip (IC) to supply power, so that the IC detects the driving current value of each pixel area, then each pixel area can be sequentially lightened, and the driving current value I n of each pixel area when a preset test picture is displayed is recorded respectively.
Alternatively, the preset test screen may include a white test screen, such as a W255 screen, that is, a white screen having a gray scale value of 255.
Alternatively, in consideration of the case of correcting color shift at the same time as the lifetime compensation, the preset test screen may further include at least one of a red test screen, a green test screen, and a blue test screen, for example, an R255 screen, a G255 screen, and a B255 screen, that is, a red screen having a gray scale value of 255, a green screen having a gray scale value of 255, and a blue screen having a gray scale value of 255. The pixel area displays a red test picture, namely, red sub-pixels in the pixel area are lighted, sub-pixels in other colors are not lighted, the pixel area displays a green test picture, namely, green sub-pixels in the pixel area are lighted, sub-pixels in other colors are not lighted, the pixel area displays a blue test picture, namely, blue sub-pixels in the pixel area are lighted, and sub-pixels in other colors are not lighted, so that the service life of the display device can be compensated through the red test picture, the green test picture and the blue test picture, and the color cast of the display device can be corrected at the same time, and the color cast problem of the display device after the service life compensation is avoided.
When the preset test frames include a white test frame, a red test frame, a green test frame and a blue test frame, the driving current values I n corresponding to the white test frame, the red test frame, the green test frame and the blue test frame displayed in each pixel region can be recorded respectively. That is, for any pixel region, 4 drive current values I nW、InR、InG and I nB can be recorded. When the preset test frame includes only the white test frame, only 1 driving current value I nW is recorded for any pixel area.
Step 102: and determining correction parameters of each pixel area according to each driving current value and a pre-stored initial current value corresponding to each pixel area.
In practical application, before the display device leaves the factory, the corresponding driving current value when each pixel area displays the preset test picture is detected, so that the driving current value is stored as the initial current value corresponding to each pixel area and is used for comparing with the driving current value measured after the display device is used for a period of time. Specifically, the display panel may be changed to be powered inside the IC, so that the IC detects the driving current value of each pixel area, and then each pixel area may be sequentially turned on, and the driving current value of each pixel area when a preset test picture is displayed is recorded, so as to obtain an initial current value I 0 corresponding to each pixel area, and recorded in the Flash memory (Flash).
It should be noted that, in the driving current value detection process before the display device leaves the factory, the preset test picture may also include a white test picture, or at least one of a red test picture, a green test picture, and a blue test picture.
When the preset test frames include a white test frame, a red test frame, a green test frame and a blue test frame, the initial current values I 0 corresponding to the white test frame, the red test frame, the green test frame and the blue test frame displayed in each pixel region can be recorded respectively. That is, for any one pixel region, 4 initial current values I 0W、I0R、I0G and I 0B may be recorded. When the preset test frame includes only the white test frame, only 1 driving current value I 0W is recorded for any pixel area.
Optionally, the step may be specifically implemented by the following manner, including:
For any pixel region, determining a correction parameter of the pixel region according to a driving current value corresponding to the pixel region and a pre-stored initial current value corresponding to the pixel region by the following formula (1);
B＝h*(I0-In) (1)
the B is a correction parameter of the pixel area, h is a first preset constant, I 0 is an initial current value corresponding to the pixel area, and I n is a driving current value corresponding to the pixel area.
In a specific application, the first preset constant h may be obtained by performing curve fitting according to the aging condition of the actual display device sample.
Wherein, for white test pictures, B W＝h*(I0W-InW can be obtained according to the above formula (1), for red test pictures, B R＝h*(I0R-InR can be obtained according to the above formula (1), for green test pictures, B G＝h*(I0G-InG can be obtained according to the above formula (1), and for blue test pictures, B B＝h*(I0B-InB can be obtained according to the above formula (1).
Step 103: and determining an aging parameter of each pixel area.
In the embodiment of the present invention, this step may be performed during the use process of the display device after leaving the factory, and there is no strict timing relationship with the steps 101 and 102, and the step 103 only needs to be performed before the step 104.
Specifically, the step may be implemented by a de-burn in compensation method, firstly, an R average gray scale value, a G average gray scale value, a B average gray scale value, and a W average gray scale value of each pixel region in a unit time may be recorded by an IC, and according to the R average gray scale value, the G average gray scale value, the B average gray scale value, and the W average gray scale value, an aging value a n of each pixel region is determined by the following formula (2).
An＝k*(GL)γ (2)
Wherein n is the number of times of determining the aging parameter of each pixel region from the beginning of use to the current of the display device after leaving the factory, k is a third preset constant, GL is an average gray scale value, and gamma is a gamma value.
In a specific application, the third preset constant k may be obtained by performing curve fitting according to the aging condition of the actual display device sample. The gamma value γ can be set to 2.2.
Wherein, for the R average gray-scale value, a nR＝k*(GLR)γ can be obtained according to the above formula (2), for the G average gray-scale value, a nG＝k*(GLG)γ can be obtained according to the above formula (2), for the B average gray-scale value, a nB＝k*(GLB)γ can be obtained according to the above formula (2), and for the W average gray-scale value, a nW＝k*(GLW)γ can be obtained according to the above formula (2).
Then, the sum of the aging values of each pixel region when the display device starts to be used can be recorded by the data counting mode, so that the aging parameter a of each pixel region is obtained, and a=a 0+A1+A2…+An.
Step 104: and for any pixel area, determining a target gray scale value of the pixel area according to the aging parameter and the correction parameter of the pixel area.
In an application, optionally, the step may specifically include: for any pixel region, determining a target gray scale value of the pixel region according to an aging parameter and a correction parameter of the pixel region by the following formula (3);
Lx＝m*(1+A)*(1+B)*L0 (3)
the L x is a target gray-scale value of the pixel area, the m is a second preset constant, the a is an aging parameter of the pixel area, the B is a correction parameter of the pixel area, and the L 0 is a gray-scale value to be displayed of the pixel area.
Specifically, when the gray-scale value to be displayed in a certain pixel area, that is, the gray-scale value to be displayed by the sub-pixel in the pixel area, is L 0, the target gray-scale value of the sub-pixel in the pixel area, that is, the compensated gray-scale value L x, can be determined by the above formula (3).
In application, the target gray-scale value L xW of the pixel region can be obtained according to the above formula (3) specifically in accordance with a nW and B W, where L xW＝m*(1+AnW)*(1+BW)*L0.
Step 105: and for any pixel region, carrying out service life compensation on the pixel region according to the target gray scale value of the pixel region.
In this step, lifetime compensation may be achieved by luminance compensation of the sub-pixels. For the case that the preset test picture only comprises a white test picture, for any pixel area, the brightness of an R (red) sub-pixel, a G (green) sub-pixel and a B (blue) sub-pixel in the pixel area can be compensated according to the target gray scale value L xW, namely, when any sub-pixel in the pixel area needs to display the gray scale value L 0, the brightness of the sub-pixel can be improved through the target gray scale value L xW, and the purpose of life compensation is achieved.
Optionally, in the case that the preset test screen includes a white test screen and at least one of a red test screen, a green test screen, and a blue test screen, the step may include at least one of the following steps:
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the red test picture; according to the adjusted target gray scale value, compensating the brightness of the red sub-pixel in the pixel area;
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the green test picture; according to the adjusted target gray scale value, compensating the brightness of the green sub-pixels in the pixel area;
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the blue test picture; and compensating the brightness of the blue sub-pixel in the pixel area according to the adjusted target gray scale value.
In practical application, if the lifetime compensation is directly performed according to the target gray-scale value L xW, after the compensation, the display device may have a color shift to a certain extent, and since the white frame is formed by the R (red) sub-pixel, the G (green) sub-pixel, and the B (blue) sub-pixel together, the display device may adjust the target gray-scale value L xW, that is, fine-adjust the target gray-scale value L xW according to a nR and B R, to obtain an adjusted gray-scale value L xR corresponding to the R sub-pixel, and compensate the brightness of the R sub-pixel in the pixel region according to the adjusted gray-scale value L xR. According to A nG and B G, the target gray-scale value L xG is finely adjusted to obtain an adjusted gray-scale value L xG corresponding to the G sub-pixel, and according to the adjusted gray-scale value L xG, the brightness of the G sub-pixel in the pixel region is compensated. And fine-tuning the target gray-scale value L xB according to A nB and B B to obtain an adjusted gray-scale value L xB corresponding to the B sub-pixel, and compensating the brightness of the B sub-pixel in the pixel area according to the adjusted gray-scale value L xB. Therefore, the color cast of the display device can be corrected while the service life is compensated, and the color cast problem of the display device after the service life compensation is avoided.
In the embodiment of the invention, the corresponding driving current value when each pixel area displays the preset test picture can be detected first, wherein the display area is divided into a plurality of pixel areas, and the pixel areas comprise a plurality of sub-pixels. The correction parameters for each pixel region may then be determined based on each drive current value and the pre-stored initial current value corresponding to each pixel region. After determining the aging parameter of each pixel region, for any pixel region, determining the target gray scale value of the pixel region according to the aging parameter and the correction parameter of the pixel region, and finally performing life compensation on the pixel region according to the target gray scale value of the pixel region. In the embodiment of the invention, for any pixel area, a correction parameter can be determined based on the current driving current and the pre-stored initial current, and then the gray scale value of the pixel area is corrected through the correction parameter to obtain the target gray scale value. The service life of the pixel area is compensated according to the corrected target gray scale value, so that the difference between the target gray scale value and the gray scale compensation amount actually required can be reduced, the influence of external interference is reduced, and the service life compensation effect is improved.
Example two
Referring to fig. 2, there is shown a block diagram of a lifetime compensation device of a display device according to a second embodiment of the present invention, the device 200 includes:
a detection module 201, configured to detect a driving current value corresponding to each pixel region when a preset test frame is displayed respectively; the display area is divided into a plurality of pixel areas, and the pixel areas comprise a plurality of sub-pixels;
A first determining module 202, configured to determine a correction parameter of each pixel area according to each driving current value and a pre-stored initial current value corresponding to each pixel area;
a second determining module 203, configured to determine an aging parameter of each pixel area;
a third determining module 204, configured to determine, for any one of the pixel areas, a target gray-scale value of the pixel area according to the aging parameter and the correction parameter of the pixel area;
And the compensation module 205 is configured to perform lifetime compensation on any one of the pixel areas according to the target gray-scale value of the pixel area.
Optionally, the detection module includes:
The first control sub-module is used for controlling the driving chip to supply power for the display device when receiving the service life compensation correction instruction;
The second control submodule is used for sequentially controlling each pixel area to display the preset test picture;
And the detection submodule is used for detecting the driving current value of the pixel area through the driving chip when the preset test picture is displayed in the pixel area for any pixel area.
Optionally, the first determining module includes:
the first determining submodule is used for determining correction parameters of the pixel areas according to the driving current value corresponding to the pixel areas and the pre-stored initial current value corresponding to the pixel areas for any pixel area through the following formula;
B＝h*(I0-In)
the B is a correction parameter of the pixel area, h is a first preset constant, I 0 is an initial current value corresponding to the pixel area, and I n is a driving current value corresponding to the pixel area.
Optionally, the third determining module includes:
the second determining submodule is used for determining a target gray scale value of any pixel area according to the aging parameter and the correction parameter of the pixel area through the following formula;
Lx＝m*(1+A)*(1+B)*L0
the L x is a target gray-scale value of the pixel area, the m is a second preset constant, the a is an aging parameter of the pixel area, the B is a correction parameter of the pixel area, and the L 0 is a gray-scale value to be displayed of the pixel area.
Optionally, the preset test picture includes a white test picture.
Optionally, the preset test picture further includes at least one of a red test picture, a green test picture, and a blue test picture.
Optionally, the compensation module includes at least one of the following sub-modules:
The first compensation submodule is used for adjusting the target gray scale value determined by the pixel area corresponding to the white test picture according to the ageing parameter and the correction parameter determined by the pixel area corresponding to the red test picture for any pixel area; according to the adjusted target gray scale value, compensating the brightness of the red sub-pixel in the pixel area;
the second compensation submodule is used for adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the green test picture for any pixel region; according to the adjusted target gray scale value, compensating the brightness of the green sub-pixels in the pixel area;
The third compensation submodule is used for adjusting the target gray scale value determined by the pixel area corresponding to the white test picture according to the aging parameter and the correction parameter determined by the pixel area corresponding to the blue test picture for any pixel area; and compensating the brightness of the blue sub-pixel in the pixel area according to the adjusted target gray scale value.
In the embodiment of the invention, a detection module is used for detecting a corresponding driving current value when each pixel area respectively displays a preset test picture, wherein the display area is divided into a plurality of pixel areas, and the pixel areas comprise a plurality of sub-pixels. The correction parameters of each pixel region can then be determined by the first determination module according to each driving current value and the pre-stored initial current value corresponding to each pixel region. After the aging parameter of each pixel area is determined by the second determining module, for any pixel area, a target gray scale value of the pixel area can be determined by the third determining module according to the aging parameter and the correction parameter of the pixel area, and finally, the service life of the pixel area can be compensated by the compensating module according to the target gray scale value of the pixel area. In the embodiment of the invention, for any pixel area, a correction parameter can be determined based on the current driving current and the pre-stored initial current, and then the gray scale value of the pixel area is corrected through the correction parameter to obtain the target gray scale value. The service life of the pixel area is compensated according to the corrected target gray scale value, so that the difference between the target gray scale value and the gray scale compensation amount actually required can be reduced, the influence of external interference is reduced, and the service life compensation effect is improved.
The embodiment of the invention also discloses a display device which comprises a processor, a memory and a computer program stored on the memory and capable of running on the processor, wherein the computer program realizes the steps of the service life compensation method when being executed by the processor.
The embodiment of the invention also discloses a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the steps of the service life compensation method when being executed by a processor.
For the foregoing method embodiments, for simplicity of explanation, the methodologies are shown as a series of acts, but one of ordinary skill in the art will appreciate that the present invention is not limited by the order of acts, as some steps may, in accordance with the present invention, occur in other orders or concurrently. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present invention.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The foregoing has described in detail the method and apparatus for lifetime compensation of a display device and the display device provided by the present invention, and specific examples have been applied to illustrate the principles and embodiments of the present invention, and the above examples are only used to help understand the method and core idea of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (5)
1. A method of lifetime compensation for a display device, the method comprising:
detecting a corresponding driving current value when each pixel area displays a preset test picture respectively; the display area is divided into a plurality of pixel areas, and the pixel areas comprise a plurality of sub-pixels; the preset test picture comprises a white test picture;
For any pixel area, determining a correction parameter of the pixel area according to a driving current value corresponding to the pixel area and a pre-stored initial current value corresponding to the pixel area by the following formula;
B＝h*(I0-In)
The correction parameters of the pixel region are represented by B, h is a first preset constant, I 0 is an initial current value corresponding to the pixel region, and I n is a driving current value corresponding to the pixel region;
determining an aging parameter of each pixel region;
For any pixel region, determining a target gray scale value of the pixel region according to the aging parameter and the correction parameter of the pixel region by the following formula;
Lx＝m*(1+A)*(1+B)*L0
the L x is a target gray-scale value of the pixel region, the m is a second preset constant, the a is an aging parameter of the pixel region, the B is a correction parameter of the pixel region, and the L 0 is a gray-scale value to be displayed of the pixel region;
For any pixel region, performing life compensation on the pixel region according to a target gray scale value of the pixel region;
The preset test picture also comprises at least one of a red test picture, a green test picture and a blue test picture; and for any pixel region, performing life compensation on the pixel region according to the target gray scale value of the pixel region, wherein the life compensation comprises at least one of the following steps:
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the red test picture; according to the adjusted target gray scale value, compensating the brightness of the red sub-pixel in the pixel area;
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the green test picture; according to the adjusted target gray scale value, compensating the brightness of the green sub-pixels in the pixel area;
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the blue test picture; and compensating the brightness of the blue sub-pixel in the pixel area according to the adjusted target gray scale value.
2. The method according to claim 1, wherein detecting the corresponding driving current value when each pixel region displays the preset test frame, respectively, comprises:
When a service life compensation correction instruction is received, controlling a driving chip to supply power for the display device;
sequentially controlling each pixel area to display the preset test picture;
for any pixel region, when the preset test picture is displayed in the pixel region, detecting a driving current value of the pixel region through the driving chip.
3. A lifetime compensation device for a display device, the device comprising:
The detection module is used for detecting a corresponding driving current value when each pixel area displays a preset test picture respectively; the display area is divided into a plurality of pixel areas, and the pixel areas comprise a plurality of sub-pixels; the preset test picture comprises a white test picture;
The first determining module is used for determining correction parameters of the pixel areas according to the driving current value corresponding to the pixel areas and the pre-stored initial current value corresponding to the pixel areas for any pixel area through the following formula;
B＝h*(I0-In)
The correction parameters of the pixel region are represented by B, h is a first preset constant, I 0 is an initial current value corresponding to the pixel region, and I n is a driving current value corresponding to the pixel region;
A second determining module, configured to determine an aging parameter of each pixel area;
The third determining module is used for determining a target gray scale value of the pixel area according to the aging parameter and the correction parameter of the pixel area for any pixel area through the following formula;
Lx＝m*(1+A)*(1+B)*L0
the L x is a target gray-scale value of the pixel region, the m is a second preset constant, the a is an aging parameter of the pixel region, the B is a correction parameter of the pixel region, and the L 0 is a gray-scale value to be displayed of the pixel region;
The compensation module is used for carrying out service life compensation on any pixel area according to the target gray scale value of the pixel area;
the preset test picture also comprises at least one of a red test picture, a green test picture and a blue test picture;
the device is also for:
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the red test picture; according to the adjusted target gray scale value, compensating the brightness of the red sub-pixel in the pixel area;
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the green test picture; according to the adjusted target gray scale value, compensating the brightness of the green sub-pixels in the pixel area;
for any pixel region, adjusting a target gray scale value determined by the pixel region corresponding to the white test picture according to an aging parameter and a correction parameter determined by the pixel region corresponding to the blue test picture; and compensating the brightness of the blue sub-pixel in the pixel area according to the adjusted target gray scale value.
4. A display device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the lifetime compensation method of any one of claims 1 to 2.
5. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the lifetime compensation method of any one of claims 1 to 2.
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