CN113096575A - 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
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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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
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
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 the driving current value when each pixel area respectively displays a preset test picture; determining a correction parameter of each pixel region according to the driving current value and the initial current value; determining an aging parameter for each pixel region; determining a target gray-scale value of the pixel area according to the aging parameter and the correction parameter of the pixel area; and carrying out life compensation according to the target gray-scale value of the pixel area. In the invention, for any pixel region, 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 region is corrected through the correction parameter to obtain the target gray-scale value. And the service life compensation is carried out on the pixel region according to the corrected target gray-scale value, so that the difference between the target gray-scale value and the actually required gray-scale compensation amount 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 method and an apparatus for compensating a lifetime of a display device, and a display device.
Background
For the lifetime compensation of the display device, methods such as external compensation, de-burn in compensation, etc. are generally included, wherein the de-burn in compensation method 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 manner through a life counting (data counting) mode according to the record of the pixel display information and the life model of the display device, 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 service life of the display device is prolonged.
However, in the de-burn in compensation method, the recording of the pixel display information is usually affected by external factors such as temperature, so that the difference between the calculated compensation amount and the actually required compensation amount is larger and larger, and the effect of the lifetime compensation is not good.
Disclosure of Invention
The invention provides a service life compensation method and device of a display device and the display device, and aims to solve the problem that the service life compensation effect is poor due to the fact that the difference between the calculated compensation amount and the actually required compensation amount is larger and larger under the interference of external factors in the conventional de-burn in compensation method.
In order to solve the above problems, the present invention discloses a method for compensating a lifetime of a display device, the method comprising:
detecting corresponding driving current values when each pixel region respectively displays a preset test picture; the display area is divided into a plurality of pixel areas, and each pixel area comprises a plurality of sub-pixels;
determining a correction parameter of each pixel region according to each driving current value and a pre-stored initial current value corresponding to each pixel region;
determining an aging parameter for each of the pixel regions;
for any one 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 for any one pixel region, carrying out life compensation on the pixel region according to the target gray-scale value of the pixel region.
Optionally, the detecting the corresponding driving current values when each pixel region respectively displays the preset test picture includes:
when a service life compensation correction instruction is received, controlling a driving chip to supply power to a display device;
sequentially controlling each pixel region to display the preset test picture;
and for any one pixel area, when the preset test picture is displayed in the pixel area, detecting the driving current value of the pixel area through the driving chip.
Optionally, the determining a correction parameter of each pixel region according to each driving current value and a pre-stored initial current value corresponding to each pixel region includes:
for any one 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 using the following formula;
B＝h*(I0-In)
wherein, B is the correction parameter of the pixel region, h is a first preset constant, and I0Is the initial current value corresponding to the pixel region, InAnd the driving current value is corresponding to the pixel area.
Optionally, the determining, for any one of the pixel regions, a target gray-scale value of the pixel region according to the aging parameter and the correction parameter of the pixel region includes:
for any one 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
wherein, L isxIs a target gray-scale value of the pixel region, m is a second preset constant, A is an aging parameter of the pixel region, B is a correction parameter of the pixel region, and L0And the gray scale value to be displayed in the pixel region is obtained.
Optionally, the preset test picture comprises 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 regions, performing lifetime compensation on the pixel region according to a target gray-scale value of the pixel region, including at least one of the following steps:
for any pixel area, adjusting a 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 red test picture; compensating the brightness of the red sub-pixel in the pixel region according to the adjusted target gray-scale value;
for any pixel area, adjusting a 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 green test picture; compensating the brightness of the green sub-pixel in the pixel area according to the adjusted target gray-scale value;
for any pixel area, adjusting a 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; and compensating the brightness of the blue sub-pixel in the pixel region according to the adjusted target gray-scale value.
In order to solve the above problems, the present invention also discloses a life compensation device of a display device, the device comprising:
the detection module is used for detecting corresponding driving current values when each pixel region respectively displays a preset test picture; the display area is divided into a plurality of pixel areas, and each pixel area comprises a plurality of sub-pixels;
the first determining module is used for determining a correction parameter of each pixel region according to each driving current value and a pre-stored initial current value corresponding to each pixel region;
a second determining module for determining an aging parameter for each of the pixel regions;
the third determining module is used for determining a target gray-scale value of any one pixel region according to the aging parameter and the correction parameter of the pixel region;
and the compensation module is used for carrying out service life compensation on any one pixel area according to the target gray-scale value of the pixel area.
Optionally, the detection module includes:
the first control submodule is used for controlling the driving chip to supply power to the display device when the service life compensation correction instruction is received;
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 one pixel area.
Optionally, the first determining module includes:
the first determining submodule is used for 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 for any one pixel region;
B＝h*(I0-In)
wherein, B is the correction parameter of the pixel region, h is a first preset constant, and I0Is the initial current value corresponding to the pixel region, InAnd the driving current value is 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 the pixel area according to the aging parameter and the correction parameter of the pixel area and the following formula for any pixel area;
Lx＝m*(1+A)*(1+B)*L0
wherein, L isxIs a target gray-scale value of the pixel region, m is a second preset constant, A is an aging parameter of the pixel region, B is a correction parameter of the pixel region, and L0And the gray scale value to be displayed in the pixel region is obtained.
Optionally, the preset test picture comprises 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 comprises at least one of the following sub-modules:
the first compensation submodule is used for adjusting a 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 red test picture; compensating the brightness of the red sub-pixel in the pixel region according to the adjusted target gray-scale value;
the second compensation submodule is used for adjusting a 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 green test picture for any pixel area; compensating the brightness of the green sub-pixel in the pixel area according to the adjusted target gray-scale value;
the third compensation submodule is used for adjusting a 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 region according to the adjusted target gray-scale value.
In order to solve the above problem, the present invention also discloses a display device, which includes a processor, a memory, and a computer program stored on the memory and operable on the processor, wherein the computer program, when executed by the processor, implements the steps of the lifetime compensation method as described above.
In order to solve the above problem, the present invention also discloses a computer-readable storage medium on which a computer program is stored, 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 present invention, first, a driving current value corresponding to each pixel region when each pixel region respectively displays a preset test picture may be detected, where the display region is divided into a plurality of pixel regions, and each pixel region includes a plurality of sub-pixels. Then, a correction parameter for each pixel region may be determined according to each driving current value and a pre-stored initial current value corresponding to each pixel region. After the aging parameter of each pixel region is determined, for any pixel region, the target gray-scale value of the pixel region can be determined according to the aging parameter and the correction parameter of the pixel region, and finally, the service life of the pixel region can be compensated according to the target gray-scale value of the pixel region. In the embodiment of the present invention, for any pixel region, a correction parameter may be determined based on the current driving current and the pre-stored initial current, and then the gray scale value of the pixel region is corrected by the correction parameter, so as to obtain the target gray scale value. And the service life compensation is carried out on the pixel region according to the corrected target gray-scale value, so that the difference between the target gray-scale value and the actually required gray-scale compensation amount can be reduced, the influence of external interference is reduced, and the service life compensation effect is improved.
Drawings
Fig. 1 is a flowchart illustrating steps of a lifetime compensation method for a display device according to a first embodiment of the present invention;
fig. 2 is a block diagram showing a lifetime compensation apparatus for a display device according to a second embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
Fig. 1 is a flowchart illustrating steps of a lifetime compensation method for a display device according to a first embodiment of the present invention, the method including the steps of:
step 101: detecting corresponding driving current values when each pixel region respectively displays a preset test picture; the display area is divided into a plurality of pixel areas, and each pixel area comprises a plurality of sub-pixels.
In an embodiment of the present invention, a 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, a pixel unit of 8 × 8 may be divided into one pixel area, and each pixel area may include a plurality of sub-pixels.
When the display device is used for a certain period of time, a correction operation for life compensation can be performed. Optionally, the step may be specifically implemented by the following steps:
when a service life compensation correction instruction is received, controlling a driving chip to supply power to a display device;
sequentially controlling each pixel region to display the preset test picture;
and for any one pixel area, when the preset test picture is displayed in the pixel area, detecting the driving current value of the pixel area through the driving chip.
In practical application, the life compensation correction instruction can be triggered automatically or manually, so that the display device can perform correction operation when receiving the life compensation correction instruction. Firstly, the display panel can be changed into a driving chip (IC) for internal power supply, the IC detects the driving current value of each pixel area, then each pixel area can be lightened in sequence, and the driving current value I when each pixel area displays a preset test picture is recorded respectivelyn。
Alternatively, the preset test frame may include a white test frame, such as a W255 frame, that is, a white frame with a gray scale value of 255.
Optionally, in consideration of the case of correcting the color shift while compensating the lifetime, the preset test frames may further include at least one of a red test frame, a green test frame, and a blue test frame, such as an R255 frame, a G255 frame, and a B255 frame, that is, a red frame with a grayscale value of 255, a green frame with a grayscale value of 255, and a blue frame with a grayscale value of 255. The pixel area displays a red test picture, namely a red sub-pixel in the pixel area is lighted, sub-pixels of other colors are not lighted, the pixel area displays a green test picture, namely a green sub-pixel in the pixel area is lighted, sub-pixels of other colors are not lighted, and the pixel area displays a blue test picture, namely a blue sub-pixel in the pixel area is lighted, and sub-pixels of other colors are not lighted.
When the preset test picture comprises a white test picture, a red test picture, a green test picture and a blue test picture, the white test pictures respectively displayed in each pixel region can be respectively recordedCorresponding drive current value I in red test picture, green test picture and blue test picturen. That is, for any one pixel region, 4 driving current values I can be recordednW、InR、InGAnd InB. When the preset test frame only includes a white test frame, only 1 driving current value I is recorded for any pixel regionnW。
Step 102: and determining a correction parameter of each pixel region according to each driving current value and a pre-stored initial current value corresponding to each pixel region.
In practical application, before the display device leaves factory, the corresponding driving current value when each pixel region respectively displays a preset test picture can be detected, so that the driving current value is stored as the initial current value corresponding to each pixel region and is used for comparing the driving current value with the driving current value measured after the display device is used for a period of time. Specifically, the display panel may be powered inside the IC, so that the IC detects the driving current value of each pixel region, and then each pixel region may be sequentially lighted up, and the driving current value when the preset test picture is displayed in each pixel region is recorded, so as to obtain the initial current value I corresponding to each pixel region0And recorded in Flash memory (Flash).
It should be noted that, in the process of detecting the driving current value before the display device leaves the factory, the preset test picture may also include a white test picture, or further include at least one of a red test picture, a green test picture, and a blue test picture.
When the preset test picture comprises a white test picture, a red test picture, a green test picture and a blue test picture, the corresponding initial current values I of the white test picture, the red test picture, the green test picture and the blue test picture respectively displayed in each pixel region can be respectively recorded0. That is, for any one pixel region, 4 initial current values I can be recorded0W、I0R、I0GAnd I0B. When the preset test picture only comprises a white test picture, aiming at any pixel areaOnly 1 driving current value I is recorded0W。
Optionally, the step may be specifically implemented by the following steps:
for any one 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 using the following formula (1);
B＝h*(I0-In) (1)
wherein, B is the correction parameter of the pixel region, h is a first preset constant, and I0Is the initial current value corresponding to the pixel region, InAnd the driving current value is corresponding to the pixel area.
In a specific application, the first preset constant h can be obtained by curve fitting according to the aging condition of the actual display device sample.
Wherein, for white test picture, B can be obtained according to the formula (1)W＝h*(I0W-InW) For a red test frame, B can be obtained according to the above formula (1)R＝h*(I0R-InR) For green test pictures, B can be obtained according to the above formula (1)G＝h*(I0G-InG) For the blue test picture, B can be obtained according to the above formula (1)B＝h*(I0B-InB)。
Step 103: an aging parameter is determined for each of the pixel regions.
In the embodiment of the present invention, this step may be performed in the use process of the display device after the display device leaves the factory, and there is no strict timing relationship with steps 101 and 102, and step 103 only needs to be performed before step 104.
Specifically, this step may be implemented in a de-burn in compensation manner, and may be implemented by first recording, by the IC, 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, and based on 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, communicatingThe aging value A of each pixel region is determined by the following formula (2)n。
An＝k*(GL)γ (2)
Wherein n is the number of times that the aging parameter of each pixel region is currently determined from the time when the display device is shipped from the factory, k is a third preset constant, GL is an average gray scale value, and γ is a gamma value.
In a specific application, the third preset constant k can be obtained by curve fitting according to the aging condition of the actual display device sample. The gamma value gamma can be set to 2.2 in general.
Wherein, for the R average gray scale value, A can be obtained according to the above formula (2)nR＝k*(GLR)γFor the G average gray scale value, A can be obtained according to the above formula (2)nG＝k*(GLG)γFor B average gray scale value, A can be obtained according to the above formula (2)nB＝k*(GLB)γFor the W average gray scale value, A can be obtained according to the above formula (2)nW＝k*(GLW)γ。
Then, the sum of aging values of each pixel region from the beginning of the use of the display device can be recorded through a data counting mode, so that an aging parameter A of each pixel region is obtained, wherein A is A0+A1+A2....+An。
Step 104: and for any one 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.
In application, optionally, the step may specifically include: for any one 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 through the following formula (3);
Lx＝m*(1+A)*(1+B)*L0 (3)
wherein, L isxIs a target gray-scale value of the pixel region, m is a second preset constant, A is an aging parameter of the pixel region, and B is a correction parameter of the pixel regionL is0And the gray scale value to be displayed in the pixel region is obtained.
Specifically, the gray level value to be displayed of a certain pixel region, that is, the gray level value required to be displayed by the sub-pixel in the pixel region, when the gray level value required to be displayed by the sub-pixel in the pixel region is L0Then, the target gray-scale value of the sub-pixel in the pixel region, i.e. the compensated gray-scale value L, can be determined by the above formula (3)x。
When applied, can be specifically according to AnWAnd BWObtaining the target gray level L of the pixel region by the above formula (3)xWWherein L isxW＝m*(1+AnW)*(1+BW)*L0。
Step 105: and for any one pixel region, carrying out life compensation on the pixel region according to the target gray-scale value of the pixel region.
In this step, the lifetime compensation may be realized by luminance compensation of the sub-pixels. For the case that the preset test frame only includes the white test frame, for any pixel region, the gray level value L can be determined according to the target gray level valuexWCompensating the brightness of the R (red), G (green) and B (blue) sub-pixels in the pixel region, that is, any sub-pixel in the pixel region needs to display the gray-scale value L0The target gray level value L can be passedxWAnd displaying to improve the brightness of the sub-pixel and achieve the purpose of life compensation.
Optionally, in a case that the preset test picture includes a white test picture and at least one of a red test picture, a green test picture, and a blue test picture, this step may include at least one of the following steps:
for any pixel area, adjusting a 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 red test picture; compensating the brightness of the red sub-pixel in the pixel region according to the adjusted target gray-scale value;
for any pixel area, adjusting a 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 green test picture; compensating the brightness of the green sub-pixel in the pixel area according to the adjusted target gray-scale value;
for any pixel area, adjusting a 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; and compensating the brightness of the blue sub-pixel in the pixel region according to the adjusted target gray-scale value.
In practical application, if the gray scale is directly based on the target gray scale value LxWPerforming lifetime compensation, the display device may have color shift to some extent after compensation, and the display device may have a target gray level value L because the white frame is formed by R (red), G (green) and B (blue) sub-pixelsxWOn the basis of (A), i.e. according tonRAnd BRFor the target gray level LxWFine tuning is carried out to obtain the adjusted gray level value L of the corresponding R sub-pixelxRAnd according to the adjusted gray level value LxRAnd compensating the brightness of the R sub-pixel in the pixel area. According to AnGAnd BGFor the target gray level LxGFine tuning is carried out to obtain the adjusted gray level value L of the corresponding G sub-pixelxGAnd according to the adjusted gray level value LxGAnd compensating the brightness of the G sub-pixel in the pixel area. According to AnBAnd BBFor the target gray level LxBFine tuning is carried out to obtain the adjusted gray level value L of the corresponding B sub-pixelxBAnd according to the adjusted gray level value LxBAnd compensating the brightness of the B sub-pixel in the pixel area. Therefore, the color cast of the display device can be corrected while the service life is compensated, and the problem of color cast of the display device after the service life is compensated is avoided.
In the embodiment of the present invention, first, a driving current value corresponding to each pixel region when each pixel region respectively displays a preset test picture may be detected, where the display region is divided into a plurality of pixel regions, and each pixel region includes a plurality of sub-pixels. Then, a correction parameter for each pixel region may be determined according to each driving current value and a pre-stored initial current value corresponding to each pixel region. After the aging parameter of each pixel region is determined, for any pixel region, the target gray-scale value of the pixel region can be determined according to the aging parameter and the correction parameter of the pixel region, and finally, the service life of the pixel region can be compensated according to the target gray-scale value of the pixel region. In the embodiment of the present invention, for any pixel region, a correction parameter may be determined based on the current driving current and the pre-stored initial current, and then the gray scale value of the pixel region is corrected by the correction parameter, so as to obtain the target gray scale value. And the service life compensation is carried out on the pixel region according to the corrected target gray-scale value, so that the difference between the target gray-scale value and the actually required gray-scale compensation amount can be reduced, the influence of external interference is reduced, and the service life compensation effect is improved.
Example two
Referring to fig. 2, a block diagram of a lifetime compensation apparatus for a display device according to a second embodiment of the present invention is shown, where the apparatus 200 includes:
the detection module 201 is configured to detect a corresponding driving current value when each pixel region respectively displays a preset test picture; the display area is divided into a plurality of pixel areas, and each pixel area comprises a plurality of sub-pixels;
a first determining module 202, configured to determine a correction parameter of each pixel region according to each driving current value and a pre-stored initial current value corresponding to each pixel region;
a second determining module 203, configured to determine an aging parameter of each of the pixel regions;
a third determining module 204, configured to determine, for any one of the pixel regions, a target gray-scale value of the pixel region according to the aging parameter and the correction parameter of the pixel region;
and the compensation module 205 is configured to, for any one of the pixel regions, perform lifetime compensation on the pixel region according to a target gray-scale value of the pixel region.
Optionally, the detection module includes:
the first control submodule is used for controlling the driving chip to supply power to the display device when the service life compensation correction instruction is received;
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 one pixel area.
Optionally, the first determining module includes:
the first determining submodule is used for 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 for any one pixel region;
B＝h*(I0-In)
wherein, B is the correction parameter of the pixel region, h is a first preset constant, and I0Is the initial current value corresponding to the pixel region, InAnd the driving current value is 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 the pixel area according to the aging parameter and the correction parameter of the pixel area and the following formula for any pixel area;
Lx＝m*(1+A)*(1+B)*L0
wherein, L isxIs a target gray-scale value of the pixel region, m is a second preset constant, A is an aging parameter of the pixel region, B is a correction parameter of the pixel region, and L0And the gray scale value to be displayed in the pixel region is obtained.
Optionally, the preset test picture comprises 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 comprises at least one of the following sub-modules:
the first compensation submodule is used for adjusting a 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 red test picture; compensating the brightness of the red sub-pixel in the pixel region according to the adjusted target gray-scale value;
the second compensation submodule is used for adjusting a 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 green test picture for any pixel area; compensating the brightness of the green sub-pixel in the pixel area according to the adjusted target gray-scale value;
the third compensation submodule is used for adjusting a 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 region according to the adjusted target gray-scale value.
In the embodiment of the present invention, first, the driving current value corresponding to each pixel region when the preset test picture is displayed in each pixel region can be detected through the detection module, wherein the display region is divided into a plurality of pixel regions, and each pixel region includes a plurality of sub-pixels. Then, the first determining module may determine the correction parameter of each pixel region according to each driving current value and a pre-stored initial current value corresponding to each pixel region. After the aging parameters of each pixel region are determined by the second determining module, for any pixel region, the target gray-scale value of the pixel region can be determined by the third determining module according to the aging parameters and the correction parameters of the pixel region, and finally, the service life of the pixel region can be compensated by the compensating module according to the target gray-scale value of the pixel region. In the embodiment of the present invention, for any pixel region, a correction parameter may be determined based on the current driving current and the pre-stored initial current, and then the gray scale value of the pixel region is corrected by the correction parameter, so as to obtain the target gray scale value. And the service life compensation is carried out on the pixel region according to the corrected target gray-scale value, so that the difference between the target gray-scale value and the actually required gray-scale compensation amount 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 which is stored on the memory and can run on the processor, wherein when the computer program is executed by the processor, the steps of the service life compensation method are realized.
The embodiment of the invention also discloses a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the steps of the service life compensation method are realized.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The method, the device and the display device for compensating the service life of the display device provided by the invention are described in detail, a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the above embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method for compensating for lifetime of a display device, the method comprising:
detecting corresponding driving current values when each pixel region respectively displays a preset test picture; the display area is divided into a plurality of pixel areas, and each pixel area comprises a plurality of sub-pixels;
determining a correction parameter of each pixel region according to each driving current value and a pre-stored initial current value corresponding to each pixel region;
determining an aging parameter for each of the pixel regions;
for any one 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 for any one pixel region, carrying out life compensation on the pixel region according to the target gray-scale value of the pixel region.
2. The method according to claim 1, wherein the detecting the driving current value corresponding to each pixel region when displaying the preset test picture comprises:
when a service life compensation correction instruction is received, controlling a driving chip to supply power to a display device;
sequentially controlling each pixel region to display the preset test picture;
and for any one pixel area, when the preset test picture is displayed in the pixel area, detecting the driving current value of the pixel area through the driving chip.
3. The method according to claim 1, wherein the determining the correction parameter for each pixel region according to each driving current value and a pre-stored initial current value corresponding to each pixel region comprises:
for any one 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 using the following formula;
B＝h*(I0-In)
wherein, B is the correction parameter of the pixel region, h is a first preset constant, and I0Is the initial current value corresponding to the pixel region, InAnd the driving current value is corresponding to the pixel area.
4. The method of claim 1, wherein determining the target gray-scale value for the pixel region according to the aging parameter and the correction parameter of the pixel region for any one of the pixel regions comprises:
for any one 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
wherein, L isxIs a target gray-scale value of the pixel region, m is a second preset constant, A is an aging parameter of the pixel region, B is a correction parameter of the pixel region, and L0And the gray scale value to be displayed in the pixel region is obtained.
5. The method of claim 1, wherein the predetermined test frame comprises a white test frame.
6. The method of claim 5, wherein the predetermined test frame further comprises at least one of a red test frame, a green test frame, and a blue test frame.
7. The method according to claim 6, wherein the performing lifetime compensation on the pixel region according to the target gray-scale value of the pixel region for any one of the pixel regions comprises at least one of the following steps:
for any pixel area, adjusting a 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 red test picture; compensating the brightness of the red sub-pixel in the pixel region according to the adjusted target gray-scale value;
for any pixel area, adjusting a 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 green test picture; compensating the brightness of the green sub-pixel in the pixel area according to the adjusted target gray-scale value;
for any pixel area, adjusting a 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; and compensating the brightness of the blue sub-pixel in the pixel region according to the adjusted target gray-scale value.
8. A lifetime compensation apparatus of a display apparatus, the apparatus comprising:
the detection module is used for detecting corresponding driving current values when each pixel region respectively displays a preset test picture; the display area is divided into a plurality of pixel areas, and each pixel area comprises a plurality of sub-pixels;
the first determining module is used for determining a correction parameter of each pixel region according to each driving current value and a pre-stored initial current value corresponding to each pixel region;
a second determining module for determining an aging parameter for each of the pixel regions;
the third determining module is used for determining a target gray-scale value of any one pixel region according to the aging parameter and the correction parameter of the pixel region;
and the compensation module is used for carrying out service life compensation on any one pixel area according to the target gray-scale value of the pixel area.
9. A display device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the life compensation method as claimed in any one of claims 1 to 8.
10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the lifetime compensation method according to any one of claims 1 to 8.
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