CN112581897B - Display device and brightness compensation method and device thereof - Google Patents

Display device and brightness compensation method and device thereof Download PDF

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Publication number
CN112581897B
CN112581897B CN202011461941.7A CN202011461941A CN112581897B CN 112581897 B CN112581897 B CN 112581897B CN 202011461941 A CN202011461941 A CN 202011461941A CN 112581897 B CN112581897 B CN 112581897B
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sub
pixels
ith
area
driving current
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CN112581897A (en
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王志祥
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The embodiment of the invention discloses a display device and a brightness compensation method and a compensation device thereof. The display device comprises a display panel, a first driving circuit, a second driving circuit and a driving circuit, wherein the display panel is provided with a display area which is divided into n areas, and each area comprises at least one sub-pixel; the brightness compensation method of the display device comprises the following steps: in the detection stage, testing a first brightness value of the sub-pixels of the ith area, and recording the corresponding relation between the first brightness value and a first drive current change value of the sub-pixels of each area surrounding the ith area; in the compensation stage, according to the corresponding relation between the first brightness value and the first drive current change value and the second drive current change value of the sub-pixels of each area surrounding the ith area, the data voltage of the sub-pixels of the ith area is compensated, so that the brightness value of the sub-pixels of the ith area is matched with the first brightness value. According to the technical scheme of the embodiment of the invention, the display brightness compensation of the sub-pixels in each area is realized, and the service life of the display device is prolonged.

Description

Display device and brightness compensation method and device thereof
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display device and a brightness compensation method and a compensation device thereof.
Background
With the development of display technology, people have higher and higher requirements for the performance of display devices. At present, the display device generally has a short service life, and the display brightness of the display device is reduced after the display device is used for a long time, so that the display effect of the display device is influenced.
Disclosure of Invention
The embodiment of the invention provides a display device, a brightness compensation method and a compensation device thereof, which are used for performing display brightness compensation on the display device and prolonging the service life of the display device.
In a first aspect, an embodiment of the present invention provides a brightness compensation method for a display device, where the display device includes a display panel, the display panel has a display area, the display area is divided into n regions, each region includes at least one sub-pixel, where n is greater than or equal to 2;
the brightness compensation method of the display device comprises the following steps:
in a detection phase, testing a first driving current of sub-pixels of each area surrounding an ith area when the sub-pixels of the ith area are in an unlighted state, testing a first brightness value of the sub-pixels of the ith area when the sub-pixels of the ith area are in a lit state, and testing a second driving current of the sub-pixels of each area surrounding the ith area under the irradiation of the sub-pixels of the ith area, and recording a corresponding relation between the first brightness value and a first driving current change value, wherein the first driving current change value is a difference value between the first driving current and the second driving current, and i is less than or equal to n;
in the compensation stage, a third driving current of the sub-pixels surrounding each of the ith region is tested when the sub-pixels of the ith region are in an unlighted state, a fourth driving current of the sub-pixels surrounding each of the ith region is tested when the sub-pixels of the ith region are in a lit state, and the data voltage of the sub-pixels of the ith region is compensated according to the corresponding relation between the first brightness value and the first driving current change value and a second driving current change value, so that the brightness value of the sub-pixels of the ith region is adapted to the first brightness value, wherein the second driving current change value is a difference value between the third driving current and the fourth driving current. Furthermore, the sub-pixels of the n regions are sequentially detected and data voltage compensated, so that the brightness value of the sub-pixels of each region is adapted to the first brightness value of the region.
Further, a ratio of a second luminance value of the sub-pixel of the ith region to the second driving current variation value in the compensation phase is equal to a ratio of the first luminance value to the first driving current variation value, and the data voltage of the sub-pixel of the ith region is compensated according to the first luminance value and the second luminance value.
Further, the brightness compensation method of the display device further includes:
and controlling the sub-pixels of the ith area to display according to the data voltage compensation value of the sub-pixels of the ith area.
Further, attaching a reflector to the display area of the display panel to test the driving current of the sub-pixels of each area surrounding the ith area under the irradiation of the sub-pixels of the lit ith area;
preferably, the light reflecting piece comprises a light reflecting film, and the light reflecting surface of the light reflecting film is attached to the display side of the display panel.
Further, compensating the data voltage of the sub-pixel of the ith area according to the first brightness value and the second brightness value includes:
adjusting the data voltage of the sub-pixels of the ith area according to the difference between the first brightness value and the second brightness value, and detecting the brightness value of the sub-pixels of the ith area;
if the brightness value of the sub-pixel of the ith area is not matched with the first brightness value, continuously adjusting the data voltage of the sub-pixel of the ith area according to the difference between the first brightness value and the brightness value of the sub-pixel of the ith area;
and if the brightness value of the sub-pixel of the ith area is matched with the first brightness value, determining a data voltage compensation value according to the data voltage of the sub-pixel of the ith area.
Further, data voltage compensation is performed on the sub-pixels of the n regions according to a compensation instruction of a user, or data voltage compensation is performed on the sub-pixels of the n regions at intervals of a set period.
In a second aspect, an embodiment of the present invention further provides a brightness compensation apparatus for a display apparatus, where the display apparatus includes a display panel, the display panel has a display area, the display area is divided into n regions, each region includes at least one sub-pixel, where n is greater than or equal to 2;
the brightness compensation apparatus of the display apparatus includes:
a detection module, configured to, in a detection phase, test a first driving current of a sub-pixel of each of an ith region when the sub-pixel of the ith region is in an unlighted state, test a first luminance value of the sub-pixel of the ith region when the sub-pixel of the ith region is in a lit state, and test a second driving current of the sub-pixel of each of the ith region when the sub-pixel of the ith region is illuminated, and record a corresponding relationship between the first luminance value and a first driving current variation value, where the first driving current variation value is a difference between the first driving current and the second driving current, and i is not greater than n;
and a compensation module, configured to, in a compensation stage, test a third driving current of the sub-pixels surrounding each of the ith region when the sub-pixels of the ith region are in an unlighted state, test a fourth driving current of the sub-pixels surrounding each of the ith region when the sub-pixels of the ith region are in a lit state, and compensate a data voltage of the sub-pixels of the ith region according to a corresponding relationship between the first luminance value and the first driving current variation value and a second driving current variation value, so as to adapt the luminance value of the sub-pixels of the ith region to the first luminance value, where the second driving current variation value is a difference between the third driving current and the fourth driving current. In a third aspect, embodiments of the present invention further provide a display apparatus for performing the brightness compensation method of the display apparatus according to the first aspect, where the display apparatus includes a display panel and a display driving module;
the display panel is provided with display areas which are divided into n areas, each area comprises at least one sub-pixel, and n is more than or equal to 2;
the display driving module is used for storing data voltage compensation values of the sub-pixels of the n regions.
Further, the display driving module is further configured to control the sub-pixels of the ith area to perform display according to the data voltage compensation value of the sub-pixels of the ith area.
In the detection stage, the first luminance value of the sub-pixel of the ith region is tested, and the sub-pixel of the ith region is tested to be in an unlighted state, and the sub-pixel of the ith region is tested to be in a lighted state and under the irradiation of the lighted sub-pixel of the ith region, the first driving current variation value of the sub-pixel of each region surrounding the ith region is tested, so as to obtain the corresponding relation between the first luminance value and the first driving current variation value. In the compensation stage, testing that the sub-pixels of the ith area are in an unlighted state, the sub-pixels of the ith area are in a lighted state and under the irradiation of the lighted sub-pixels of the ith area, and determining the brightness change of the sub-pixels of the ith area according to the corresponding relation between the first brightness value and the first drive current change value and the second drive current change value, so as to compensate the data voltage of the sub-pixels of the ith area according to the brightness change of the sub-pixels of the ith area, so that the brightness value of the sub-pixels of the ith area is matched with the first brightness value. According to the technical scheme of the embodiment of the invention, according to the principle that the illumination intensity of the driving transistor and the driving current change value caused by the illumination intensity approximately form a proportional linear relation when the driving transistor in the sub-pixel of each area is illuminated, the brightness change is determined according to the driving current change of the sub-pixel, so that the data voltage compensation of the sub-pixel of each area is realized, the brightness of the sub-pixel of each area is improved, the display brightness compensation is realized, the accuracy of the display brightness compensation is improved, and the service life of the display device is prolonged.
Drawings
Fig. 1 is a flowchart illustrating a method for compensating brightness of a display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another display device according to an embodiment of the present invention;
FIG. 4 is a block diagram of a brightness compensation apparatus of a display device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As described in the background art, the display device generally has a short lifetime, which is indicated that the display brightness of the display device becomes low after the display device is used for a long time, and the display effect of the display device is affected. In the existing solution, the area ratio of the short-lifetime sub-pixel (blue sub-pixel) is usually increased in pixel design, and a material which is not easy to degrade is selected in light emitting device selection to optimize a device interface. However, the above scheme has a limited effect of extending the life of the display device.
In view of the foregoing problems, an embodiment of the present invention provides a method for compensating brightness of a display device. Fig. 1 is a flowchart illustrating a method for compensating luminance of a display device according to an embodiment of the present invention, where the method is applicable to luminance compensation of the display device and can be performed by the luminance compensation device of the display device. FIG. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention, in which a brightness compensation method of a display device according to an embodiment of the present invention can perform brightness compensation on the display device shown in FIG. 2. As shown in FIG. 2, a display device 10 includes a display panel 100, the display panel 100 has a display area AA, the display area AA is divided into n regions, each region includes at least one sub-pixel, where n ≧ 2; accordingly, as shown in fig. 1, the method for compensating brightness of a display device specifically includes:
s110, in the detection stage, testing a first driving current of the sub-pixels surrounding each of the ith area when the sub-pixels of the ith area are in an unlighted state, testing a first luminance value of the sub-pixels surrounding each of the ith area when the sub-pixels of the ith area are in a lit state, and testing a second driving current of the sub-pixels surrounding each of the ith area when the sub-pixels of the ith area are illuminated, and recording a corresponding relationship between the first luminance value and a variation value of the first driving current.
The first driving current variation value is the difference value between the first driving current and the second driving current, and i is less than or equal to n.
Fig. 3 is a schematic structural diagram of another Display device according to an embodiment of the present invention, fig. 3 may be an embodiment of the Display device shown in fig. 2, and with reference to fig. 2 and fig. 3, the Display device 10 according to an embodiment of the present invention may be an Active-matrix Organic light-emitting diode (AMOLED) Display device, an Organic light-emitting diode (OLED) Display device, a Liquid Crystal Display (LCD) device, and the like, and the Display device 10 is taken as the AMOLED Display device for illustration in this embodiment and the following embodiments.
With reference to fig. 2 and 3, the display device 10 may include a plurality of scan lines (GL 1-GLk) extending in a row direction, a plurality of data lines (DL 1-DLj) extending in a column direction and crossing the scan lines, and the crossings of the scan lines and the data lines may define a plurality of pixel regions on the display panel 100, each of the pixel regions may have a plurality of subpixels PX disposed therein, and the plurality of subpixels PX may be arrayed in the display panel 100. Each scanning line is connected with a row of sub-pixels PX, each data line is connected with a column of sub-pixels PX, when a scanning signal in the form of a pulse signal is input into the scanning line, the row of sub-pixels PX connected with the scanning line is turned on, the turned-on sub-pixels PX can receive a data voltage signal transmitted by the data line, and the sub-pixels PX can perform light emitting display with corresponding brightness according to the received data voltage signal.
Here, the sub-pixel PX may include a pixel circuit composed of a switching transistor, a storage capacitor, a driving transistor, and an organic light emitting diode, such as a 2T1C pixel circuit or a 7T1C pixel circuit, where T represents a transistor and C represents a storage capacitor. The switch transistor in the pixel circuit plays a role of a switch, the storage capacitor is used for storing data voltage, and the driving transistor is used for generating stable driving current according to the data voltage stored by the storage capacitor so as to drive the organic light emitting diode to emit light.
The plurality of scan lines may be electrically connected to the scan driving circuit 300, and the scan driving circuit 300 may include, for example, a plurality of cascaded shift registers to supply scan signals to the plurality of scan lines row by row to select the scan lines row by row. The plurality of data lines may be electrically connected to the display driving module 200, the display driving module 200 may provide data voltage signals to the corresponding data lines to drive the corresponding sub-pixels PX to perform light emitting display, and the display driving module 200 may include a driving chip.
With reference to fig. 2 and 3, the display area AA of the display panel 100 may be divided into n regions on average, and fig. 2 and 3 both show the case where n is 9, that is, the display area AA is divided into 9 regions on average, including the region D0 to the region D8, each region includes the same number of sub-pixels PX, and fig. 3 schematically illustrates the case where each region includes three rows and three columns of sub-pixels PX. In practical applications, each area may also be configured to include other numbers of sub-pixels PX, and the number of sub-pixels PX included in each area may be increased in consideration of the time cost for performing luminance compensation on each area, for example, each area may be configured to include 10 rows and 10 columns of sub-pixels PX.
Exemplarily, in the detecting stage, the sub-pixel PX of the I-th region is tested in an unlit state, the first driving current I1 of the sub-pixel PX of each region surrounding the I-th region is tested, the first luminance value L1 of the sub-pixel PX of the I-th region is tested in an lit state, the second driving current I2 of the sub-pixel PX of each region surrounding the I-th region under the irradiation of the sub-pixel of the I-th region is tested, and the correspondence between the first luminance value L1 and the first driving current variation value is recorded, wherein the first driving current variation value is a difference I2-I1 between the first driving current I1 and the second driving current I2.
The detecting stage may be a stage before the display device 10 leaves the factory. The ith area may be any one of n areas, and when the ith area is area D0, the areas surrounding the ith area are areas D1 to D8, when the ith area is area D1, the areas surrounding the ith area are areas D0, D2 and D4, when the ith area is area D2, the areas surrounding the ith area are areas D0, D1, D3, D4 and D5, and so on.
The second drive current I2 of the sub-pixel PX surrounding each of the ith areas under the irradiation of the sub-pixel of the ith area means the second drive current I2 of the sub-pixel PX surrounding each of the ith areas under the irradiation of the sub-pixel PX of the ith area when the sub-pixel PX of the ith area is in a lit state. Illustratively, when the I-th region is the region D0, the sub-pixels of the respective regions (the region D1 to the region D8) surrounding the region D0 are tested for the second drive current I2 generated under illumination of the sub-pixels of the illuminated region D0 to determine the change in drive current generated by the sub-pixels of the respective regions surrounding the region D0 under illumination of the sub-pixels of the region D0, thereby determining the correspondence between the illumination intensity of the sub-pixels of the region D0 and the change in drive current of the surrounding sub-pixels. For example, the sub-pixels PX of the area D0 may be turned on, and the light source generated by the sub-pixels PX of the area D0 is reflected back to the display panel, so that the reflected light of the sub-pixels PX of the area D0 is irradiated to the sub-pixels PX of the areas D1 to D8, to acquire the second driving current of the sub-pixels PX of the areas D1 to D8 under the irradiation of the sub-pixels of the area D0 which is turned on. This has the advantage that the degree of influence of the irradiation of the sub-pixels of the region D0 on the variation of the driving current of the sub-pixels PX of the regions D1 to D8 can be enhanced to obtain a more accurate correspondence between the illumination intensity and the variation of the driving current, which is helpful for determining a more accurate data voltage compensation value in the subsequent compensation stage.
Optionally, a reflector is attached to the display area of the display panel to test the driving current of the sub-pixels around each of the ith area under the irradiation of the sub-pixels of the lit ith area.
In the test stage, a reflector may be attached to the display area of the display panel when the sub-pixels of the ith area are in a lighting state, so as to test the second driving current of the sub-pixels surrounding each area of the ith area under the lighting of the sub-pixels of the ith area. The reflector may be a film layer having a reflective function, and the reflector has a reflective surface, and is attached to the display area AA, so that incident light of the sub-pixels PX toward the reflective surface of the reflector can be reflected by the reflective surface and irradiate to the sub-pixels PX. When testing the driving current of the sub-pixels of each area surrounding the ith area under the irradiation of the sub-pixels of the lit ith area, the sub-pixels of each area including the ith area can be all lit, and a light reflecting member is attached to the display area of the display panel, so that the reflected light of the sub-pixels of each area can be all irradiated to the sub-pixels of each area surrounding the ith area, wherein the reflected light of the sub-pixels of the ith area can also be irradiated to the sub-pixels of each area surrounding the ith area, which is helpful for enhancing the irradiation of the sub-pixels of the ith area, and the influence degree of the driving current change of the sub-pixels of each area surrounding the ith area is obtained, so as to obtain more accurate corresponding relation between the illumination intensity and the driving current change, and be helpful for determining more accurate data voltage compensation values in the subsequent compensation stage. For example, referring to fig. 2 and fig. 3, the detection phase is described in detail by taking the ith area as area D0 as an example. Step S110 may specifically include:
s10, lighting the sub-pixels of each area surrounding the ith area, and reading the first driving current of the sub-pixels of each area surrounding the ith area through the display driving module after the first time period.
Specifically, with reference to fig. 2 and 3, the sub-pixels PX in the regions D1 to D8 surrounding the region D0 are lit up with the same data voltage Vdata0 so that the luminance of each sub-pixel PX is the same for the first period T1, and after the driving current of each sub-pixel PX is stabilized, the first driving current I1 of the sub-pixels PX in the regions D1 to D8 is read by the display driving module 200, wherein the driving current values of each sub-pixel PX are the same. At this stage, the sub-pixels in the region D0 are in an unlit state.
And S11, attaching a light reflecting piece to the display area of the display panel, lighting the sub-pixels of the ith area, and reading the second driving current of the sub-pixels of each area surrounding the ith area through the display driving module after the second time period.
The light reflecting member is attached to the display area AA such that the light reflecting surface of the light reflecting member faces the display side of the display panel. The sub-pixels PX of the region D0 are still lit at the same data voltage Vdata0 so that the luminance of the sub-pixels PX in the regions D0 to D8 is the same, a second period T2 continues from the lighting of the sub-pixels PX of the region D0, and after the driving current of each sub-pixel PX is stabilized, the second driving current I2 of the sub-pixels PX in the regions D1 to D8 is read by the display driving module 200. Since the reflective member is attached to the surface of the display area AA, the incident light of each lit sub-pixel PX toward the reflective surface of the reflective member can be reflected by the reflective surface and reflected to each sub-pixel PX.
And S12, removing the light reflecting piece, and testing the first brightness value of the sub-pixel of the ith area to obtain the corresponding relation between the first brightness value and the first drive current change value.
Specifically, the light-reflecting member attached to the display area AA is removed, and an optical brightness testing instrument (e.g., a luminance meter) is used to test the first luminance value L1 of the sub-pixel PX in the area D0, where the first driving current variation value is a difference (I2-I1) between the first driving current I1 and the second driving current I2, so that the corresponding relationship F between the first luminance value L1 and the first driving current variation value (I2-I1) can be obtained.
The pixel circuit of the sub-pixel PX includes a driving transistor, the driving transistor in the embodiment of the present invention is made of Low Temperature Polysilicon (LTPS) material, and the driving transistor of the LTPS material is sensitive to light, so that when the driving transistor is illuminated, the driving current generated by the driving transistor changes. The higher the illumination intensity received by the driving transistor, the larger the variation amplitude of the driving current, and the illumination intensity received by the driving transistor and the variation value of the driving current caused by the variation amplitude approximately form a direct proportional linear relation. The second drive current I2 of the sub-pixel PX in the region D1 to the region D8 is affected by the reflected light of the sub-pixel PX in the region D0 after lighting, compared to the first drive current I1, and therefore, the first luminance value L1 of the sub-pixel PX in the region D0 changes the drive current of the sub-pixel PX in the region D1 to the region D8. The first luminance value L1 and the first drive current variation value (I2-I1) are approximate to one of values in a direct proportional linear relationship formed by the illumination intensity received by the drive transistors of the sub-pixels PX in the regions D1 to D8 and the drive current variation value caused by the illumination intensity.
And S13, storing the corresponding relation between the first brightness value and the first drive current change value through the display drive module.
The display driving module 200 stores the corresponding relationship F between the first luminance value L1 and the first driving current variation value (I2-I1).
And S120, in the compensation stage, testing a third driving current of the sub-pixels surrounding each area of the ith area when the sub-pixels of the ith area are in an unlighted state, testing a fourth driving current of the sub-pixels surrounding each area of the ith area when the sub-pixels of the ith area are in a lighted state, and compensating the data voltage of the sub-pixels of the ith area according to the corresponding relation between the first brightness value and the first driving current change value and the second driving current change value so as to enable the brightness value of the sub-pixels of the ith area to be matched with the first brightness value.
The second driving current variation value is the difference value between the third driving current and the fourth driving current.
With reference to fig. 2 and 3, in the compensation phase, when the sub-pixel PX of the I-th region is tested to be in the unlighted state, the third driving current I3 of the sub-pixel PX of each region surrounding the I-th region is tested to be in the lit state, and the sub-pixel PX of the I-th region is tested to be in the lit state, under irradiation of the sub-pixel of each lit region, the fourth driving current I4 of the sub-pixel PX of each region surrounding the I-th region is compensated according to the corresponding relationship F between the first luminance value L1 and the first driving current variation value (I2-I1) and the second driving current variation value, so as to adapt the luminance value of the sub-pixel PX of the I-th region to the first luminance value L1, wherein the second driving current variation value is the difference (I4-I3) between the third driving current I3 and the fourth driving current I4.
Optionally, a reflector is attached to the display area of the display panel to test the driving current of the sub-pixels around each of the ith area under the irradiation of the sub-pixels of the lit ith area.
In the compensation stage, a light reflecting member may be attached to the display area of the display panel when the sub-pixels of the ith area are in the lit state, so as to test the fourth driving current of the sub-pixels of the area surrounding the ith area under the irradiation of the sub-pixels of the lit ith area. When testing the driving current of the sub-pixels of each area surrounding the ith area under the irradiation of the sub-pixels of the lit ith area, the sub-pixels of each area including the ith area can be all lit, and a light reflecting member is attached to the display area of the display panel, so that the reflected light of the sub-pixels of each area can be all irradiated to the sub-pixels of each area surrounding the ith area, wherein the reflected light of the sub-pixels of the ith area can also be irradiated to the sub-pixels of each area surrounding the ith area, which is helpful for enhancing the irradiation of the sub-pixels of the ith area, and the influence degree of the driving current change of the sub-pixels of each area surrounding the ith area is obtained, so as to obtain more accurate corresponding relation between the illumination intensity and the driving current change, and be helpful for determining more accurate data voltage compensation values in the subsequent compensation stage. Illustratively, the compensation phase will be described in detail by taking the ith area as area D0 as an example. Alternatively, the compensation phase may be any phase after the detection phase, for example, the compensation phase is a phase after the display device is used for a period of time. Correspondingly, step S120 may specifically include:
and S20, lighting the sub-pixels of each area surrounding the ith area, and reading the third driving current of the sub-pixels of each area surrounding the ith area through the display driving module after the first time period.
Illustratively, the sub-pixels PX in the regions D1 to D8 surrounding the region D0 are still lighted by the data voltage Vdata0 in the detection phase to make the luminance of each sub-pixel PX identical, which lasts for the first time period T1, after the driving current of each sub-pixel PX is stabilized, the third driving current I3 of the sub-pixels PX in the regions D1 to D8 is read by the display driving module 200, wherein the driving current value of each sub-pixel PX is identical. At this stage, the sub-pixels in the region D0 are in an unlit state.
And S21, attaching a light reflecting piece to the display area of the display panel, lighting the sub-pixels of the ith area, and reading the fourth driving current of the sub-pixels of each area surrounding the ith area through the display driving module after the sub-pixels of the ith area are continuously lighted for the second time period.
The light reflecting member is attached to the display area AA such that the light reflecting surface of the light reflecting member faces the display side of the display panel. The sub-pixels PX of the region D0 are still lit with the same data voltage Vdata0 so that the luminance of the sub-pixels PX in the regions D0 to D8 is the same, and the fourth drive current I4 of the sub-pixels PX in the regions D1 to D8 is read by the display drive module 200 after the drive current of each sub-pixel PX is stabilized for the second period of time T2 from the lighting of the sub-pixel PX of the region D0. Since the reflective member is attached to the surface of the display area AA, the incident light of each lit sub-pixel PX toward the reflective surface of the reflective member can be reflected by the reflective surface and reflected to each sub-pixel PX.
S22, retrieving a corresponding relationship between the first luminance value and the first driving current variation value through the display driving module, and compensating the data voltage of the sub-pixel of the ith region according to the corresponding relationship between the first luminance value and the first driving current variation value and the second driving current variation value, so that the luminance value of the sub-pixel of the ith region is adapted to the first luminance value.
The second driving current variation value is the difference value (I4-I3) between the third driving current I3 and the fourth driving current I4. The fourth drive current I4 of the sub-pixel PX in the region D1 to the region D8 is affected by the reflected light of the sub-pixel PX in the region D0 after lighting, as compared with the third drive current I3, and therefore, the luminance value of the sub-pixel PX in the region D0 in the compensation phase changes the drive current of the sub-pixel PX in the region D1 to the region D8.
In the compensation stage, the display device has been used for a period of time, and the display brightness of the display device changes compared with the detection stage before the factory shipment, for example, the display brightness of the display device becomes low after the display device is used for a long time. Therefore, compared to the detection stage before factory shipment, in the compensation stage, the luminance value of the sub-pixel PX in the region D0 is lower than the first luminance value L1. The illumination intensity received by the driving transistor in the sub-pixel of each area and the variation value of the driving current caused by the illumination intensity approximately form a direct proportional linear relation. Therefore, the display driving module 200 may obtain the luminance value of the sub-pixel PX of the region D0 in the compensation stage by retrieving the corresponding relationship F between the first luminance value L1 and the first driving current variation value (I2-I1), and obtaining the luminance value of the sub-pixel PX of the region D0 according to the corresponding relationship F between the first luminance value L1 and the first driving current variation value (I2-I1), and the second driving current variation value (I4-I3). According to the numerical relationship between the luminance brightness of the sub-pixel and the data voltage in the prior art, the luminance value of the sub-pixel PX in the region D0 in the compensation phase and the difference between the first luminance value L1 compensate the data voltage Vdata0 of the sub-pixel PX in the region D0, so that the luminance value of the sub-pixel PX in the region D0 is adapted to the first luminance value L1, thereby improving the luminance of the sub-pixel PX in the region D0 and realizing the luminance compensation of the sub-pixel PX in the region D0.
By analogy, in accordance with the above principle, the sub-pixels in each region (region D0 to region D8) of the display area AA can be subjected to luminance compensation.
In the detection stage, the first luminance value of the sub-pixel of the ith region is tested, and the first driving current variation value of the sub-pixel of each region surrounding the ith region is tested when the sub-pixel of the ith region is in an unlighted state, and when the sub-pixel of the ith region is in a lighted state and is irradiated by the lighted sub-pixel of each region, so as to obtain the corresponding relation between the first luminance value and the first driving current variation value. In the compensation stage, testing the sub-pixels of the ith area in a non-lighting state, testing the sub-pixels of the ith area in a lighting state and testing the second driving current change values of the sub-pixels of the ith area surrounding each area of the ith area under the irradiation of the sub-pixels of each area which is lighted, and determining the brightness change of the sub-pixels of the ith area according to the corresponding relation between the first brightness value and the first driving current change value and the second driving current change values, thereby compensating the data voltage of the sub-pixels of the ith area according to the brightness change of the sub-pixels of the ith area so as to enable the brightness value of the sub-pixels of the ith area to be matched with the first brightness value. According to the technical scheme of the embodiment of the invention, according to the principle that when the driving transistor in each area is illuminated, the illumination intensity of the driving transistor and the change value of the driving current caused by the illumination intensity approximately form a proportional linear relation, the brightness change is determined according to the change of the driving current of the sub-pixel, so that the data voltage compensation of the sub-pixel in each area is realized, the brightness of the sub-pixel in each area is improved, the display brightness compensation is realized, the accuracy of the display brightness compensation is improved, and the service life of the display device is prolonged.
Based on the above embodiments, optionally, the detection and data voltage compensation are sequentially performed on the sub-pixels of the n regions, so that the luminance value of the sub-pixel of each region is adapted to the first luminance value of the region.
For example, with reference to fig. 2 and fig. 3, in the detection phase, the first luminance values of the sub-pixels PX in the region D0 are tested, and when the sub-pixels in the region D0 are in the unlighted state and the sub-pixels in the region D0 are in the lit state and the display area is attached with the light reflecting member, the first driving current variation values of the sub-pixels in each region surrounding the region D0 are tested, so as to obtain the corresponding relationship between the first luminance values corresponding to the region D0 and the first driving current variation values. By analogy, the first luminance values of the sub-pixels PX of the regions D1 to D8 are sequentially tested, and the correspondence between the first luminance values of the sub-pixels PX of each region and the first drive current variation value is obtained.
In the compensation stage, when the sub-pixels PX in the test area D0 are in an unlighted state, and the sub-pixels PX in the area D0 are in a lit state, and the display area is attached with the light reflecting member, the second driving current variation value of the sub-pixels PX in each area surrounding the area D0 is determined, so as to determine the luminance variation of the sub-pixels PX in the area D0 according to the corresponding relationship between the first luminance value and the first driving current variation value and the second driving current variation value, so as to compensate the data voltage of the sub-pixels PX in the area D0, and adapt the luminance value of the sub-pixels PX in the area D0 to the first luminance value, thereby realizing the luminance compensation of the sub-pixels PX in the area D0. By analogy, the data voltages of the sub-pixels PX of the regions D1 to D8 are sequentially compensated, thereby realizing the luminance compensation of the sub-pixels PX of the regions in the entire display panel.
Optionally, a ratio of a second luminance value of the sub-pixel of the ith region to the second driving current variation value in the compensation stage is equal to a ratio of the first luminance value to the first driving current variation value, and the data voltage of the sub-pixel of the ith region is compensated according to the first luminance value and the second luminance value.
Illustratively, the second luminance value of the sub-pixel of the ith area in the compensation stage is the luminance value of the sub-pixel of the ith area in the lighting state in the compensation stage. In conjunction with fig. 2 and 3, the description will be made taking the ith area as area D0 as an example. The reason why the ratio of the second luminance value L2 and the second drive current variation value (I4-I3) of the subpixel PX in the region D0 in the compensation stage is equal to the ratio of the first luminance value L1 and the first drive current variation value (I2-I1), i.e., L2/(I4-I3) is L1/(I2-I1) is that the illumination intensity received by the drive transistor in the pixel circuit of the subpixel PX and the drive current variation value caused thereby are approximately proportional linear relationships, and the illumination intensity received by the drive transistor of the subpixel PX in the regions D1 to D8 (i.e., the reflected light intensity of the subpixel PX in the region D0 after the light reflector is attached) and the drive current variation value caused thereby are approximately proportional linear relationships.
Since the first luminance value L1 and the first driving current variation value (I2-I1) are known quantities obtained in the detection stage, and the second driving current variation value (I4-I3) is known quantity obtained in the compensation stage, the second luminance value L2 of the sub-pixel PX of the region D0 in the compensation stage can be calculated according to L2/(I4-I3) ═ L1/(I2-I1). Therefore, the data voltage of the sub-pixel PX of the region D0 may be compensated according to the prior art, which shows the numerical relationship among the display luminance, the driving current, and the data voltage of the sub-pixel PX of the region D0, and the difference between the second luminance value L2 and the first luminance value L1, so that the luminance value of the sub-pixel PX of the region D0 is adapted to the first luminance value L1, thereby increasing the luminance of the sub-pixel PX of the region D0, and realizing the luminance compensation of the sub-pixel PX of the region D0.
By analogy, in accordance with the above principle, the data voltages of the sub-pixels in the respective regions (region D0 to region D8) of the display area AA can be compensated.
Optionally, the sub-pixels of the ith area are controlled to display according to the data voltage compensation values of the sub-pixels of the ith area.
Illustratively, the data voltage compensation value of the sub-pixel of the ith area is a data voltage compensation value determined by compensating the data voltage of the sub-pixel of the ith area according to the corresponding relationship between the first brightness value and the first driving current variation value and the second driving current variation value in the compensation stage. With reference to fig. 2 and 3, the description will be made by taking the ith area as area D0 as an example. According to the numerical relationship among the display luminance, the driving current, and the data voltage of the sub-pixel in the related art, the numerical relationship among the compensated display luminance, the driving current, and the data voltage of the sub-pixel PX in the region D0 can be determined, the data voltage compensation value of the sub-pixel PX in the region D0 is introduced into the display driving module 200, and the subsequent normal display process of the region D0 is controlled with the data voltage compensation value as a reference. For example, for any display brightness in the region D0, the display brightness in the region D0 is compensated by adding the data voltage corresponding to the display brightness to the data voltage compensation value stored in the display driving module 200 according to the numerical relationship among the original display brightness, the driving current, and the data voltage in the region D0, and then displaying the new data voltage of the display brightness in the region D0.
By analogy, according to the above principle, the data voltage compensation values of the sub-pixels in each region (region D0 to region D8) in the display region AA can be stored by the display driving module 200, and the sub-pixels in the region are controlled to display according to the data voltage compensation values corresponding to each region, so that the brightness compensation of the whole display panel is realized, and the service life of the display device is prolonged.
Optionally, the reflector includes a reflective film, and a reflective surface of the reflective film is attached to the display side of the display panel.
The reflective film may be a retroreflective material made of a thin film material. The reflective film is provided with a reflective surface, and the reflective surface of the reflective film is attached to the display side of the display panel, so that incident light of the sub-pixels of the display area towards the reflective surface can be reflected to the sub-pixels through the reflective surface. Optionally, the larger the reflectivity of the reflective film is, the better the reflectivity of the reflective film is, so that after the reflective film is attached to the display panel, the reflected light of the sub-pixel is stronger, the illumination intensity received by the driving transistor in the pixel circuit of the sub-pixel is larger, the caused change of the driving current is also larger, the direct proportional linear relationship formed by the illumination intensity received by the driving transistor and the caused change value of the driving current is more accurate, and the improvement of the accuracy of the display brightness compensation is facilitated.
Optionally, compensating the data voltage of the sub-pixel of the ith region according to the first luminance value and the second luminance value includes:
s210, adjusting the data voltage of the sub-pixel of the ith area according to the difference between the first brightness value and the second brightness value, and detecting the brightness value of the sub-pixel of the ith area.
Wherein, the data voltage of the sub-pixel PX of the i-th region is adjusted according to the prior art numerical relationship between the display luminance, the driving current, and the data voltage of the sub-pixel, and the difference between the second luminance value and the first luminance value of the sub-pixel PX of the i-th region.
Detecting the luminance value of the sub-pixel of the ith area means repeatedly testing the variation value of the driving current of the sub-pixel of each area surrounding the ith area when the sub-pixel of the ith area is in the unlighted state and the sub-pixel of the ith area is in the lit state and the display area is attached to the light reflecting member, so as to calculate the luminance value of the sub-pixel PX of the ith area according to the variation value of the driving current and the corresponding relationship between the first luminance value and the first variation value of the driving current.
S220, judging whether the brightness value of the sub-pixel of the ith area is matched with the first brightness value.
If the luminance value of the sub-pixel of the ith area is not adapted to the first luminance value, executing S230; if the luminance values of the sub-pixels of the ith region are adapted to the first luminance value, S240 is performed.
The method includes determining whether a luminance value of a sub-pixel of an ith region is adapted to a first luminance value, that is, determining whether the luminance value of the sub-pixel of the ith region is close to the first luminance value, for example, whether an absolute value of a difference between the luminance value of the sub-pixel of the ith region and the first luminance value is smaller than a preset value.
S230, continuously adjusting the data voltage of the sub-pixel of the ith area according to the difference between the first brightness value and the brightness value of the sub-pixel of the ith area.
If the difference between the luminance value of the sub-pixel in the ith area and the first luminance value is too large, the data voltage of the sub-pixel PX in the ith area is continuously adjusted according to the numerical relationship among the display luminance, the driving current, and the data voltage of the sub-pixel in the prior art, and the difference between the first luminance value and the luminance value of the sub-pixel in the ith area.
And S240, determining a data voltage compensation value according to the data voltage of the sub-pixel of the ith area.
If the brightness value of the sub-pixel of the ith area is close to the first brightness value, the fact that the brightness value of the sub-pixel of the ith area is compensated to be close to the factory-detected brightness is determined, and a data voltage compensation value is determined according to the compensated data voltage of the sub-pixel of the ith area at the moment.
Optionally, the sub-pixels of the n regions are subjected to data voltage compensation according to a compensation instruction of a user.
For example, a compensation key may be provided in the display device, and when a user needs to perform brightness compensation on the display device, the compensation key may be pressed, and the display driving module in the display device may sequentially perform data voltage compensation on the sub-pixels in the n regions in the display device according to a received compensation instruction.
Alternatively, the data voltage compensation may be performed on the n regions of the sub-pixels at intervals of a set period.
Specifically, a display driving module in the display device presets a set period, for example, the set period is half a year, so that the display device sequentially performs data voltage compensation on the sub-pixels of the n regions every set period to implement brightness compensation, thereby prolonging the service life of the display device.
Fig. 4 is a schematic block diagram of a brightness compensation apparatus of a display device according to an embodiment of the present invention, which is applicable to brightness compensation of the display device according to the embodiment of the present invention. The brightness compensation device of the display device provided by the embodiment of the invention can execute the brightness compensation method of the display device provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Referring to FIG. 2, the display device 10 includes a display panel 100, the display panel 100 has a display area AA, the display area AA is divided into n regions, each region includes at least one sub-pixel, wherein n ≧ 2; accordingly, as shown in fig. 4, the luminance compensation apparatus of the display apparatus specifically includes a detection module 111 and a compensation module 112.
The detecting module 111 is configured to, in a detecting stage, test a first driving current of the sub-pixels surrounding each of the ith region when the sub-pixels of the ith region are in an unlighted state, test a first luminance value of the sub-pixels of the ith region when the sub-pixels of the ith region are in a lit state, and record a second driving current of the sub-pixels surrounding each of the ith region when the sub-pixels of the ith region are illuminated, and record a corresponding relationship between the first luminance value and a first driving current variation value, where the first driving current variation value is a difference between the first driving current and the second driving current, and i is not greater than n; .
The compensation module 112 is configured to, in the compensation stage, test a third driving current of the sub-pixels surrounding each of the ith region when the sub-pixels of the ith region are in an unlighted state, test a fourth driving current of the sub-pixels surrounding each of the ith region when the sub-pixels of the ith region are in a lit state, and compensate the data voltage of the sub-pixels of the ith region according to a corresponding relationship between the first luminance value and a change value of the first driving current and a change value of the second driving current, so as to adapt the luminance value of the sub-pixels of the ith region to the first luminance value, where the change value of the second driving current is a difference value between the third driving current and the fourth driving current. .
The brightness compensation device of the display device provided by the embodiment of the invention can execute the brightness compensation method of the display device provided by any embodiment of the invention, has the corresponding functional modules and beneficial effects of the execution method, and is not described again.
Fig. 5 is a schematic structural diagram of another display device provided in the embodiment of the present invention, where the display device may be a mobile phone, a computer, a tablet computer, an electronic device with a display function, and the like, and fig. 5 schematically illustrates a case where the display device 10 is a mobile phone. The display device provided in the embodiment of the present invention is configured to perform the brightness compensation method of the display device provided in any embodiment of the present invention, and with reference to fig. 2 and fig. 5, the display device 10 includes a display surface 100 and a display driving module 200; the display panel 100 has a display area AA, which is divided into n regions, each region including at least one sub-pixel PX, where n is greater than or equal to 2; the display driving module 200 is used for storing the data voltage compensation values of the sub-pixels of the n regions.
The display driving module 200 may include a driving chip, and the data voltage compensation values of the sub-pixels in the n regions obtained in the compensation stage may be stored in the driving chip of the display driving module 200, so as to perform data voltage compensation on the sub-pixels in each region through the driving chip.
The display device provided by the embodiment of the invention can execute the brightness compensation method of the display device provided by the embodiment of the invention, has the corresponding functional modules and beneficial effects of the execution method, and is not described again.
On the basis of the foregoing embodiment, optionally, the display driving module is further configured to control the sub-pixels of the ith area to perform display according to the data voltage compensation values of the sub-pixels of the ith area.
With reference to fig. 2 and fig. 3, the display driving module 200 may correct the data voltage corresponding to the pre-display luminance according to the pre-display luminance and the data voltage compensation value of each region, and output the corrected data voltage to the sub-pixels PX of each region through the data lines, so as to implement luminance compensation for the sub-pixels of each region, thereby prolonging the service life of the display device.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. The brightness compensation method of the display device is characterized in that the display device comprises a display panel, the display panel is provided with a display area, the display area is divided into n areas, each area comprises at least one sub-pixel, and n is more than or equal to 2;
the brightness compensation method of the display device comprises the following steps:
in a detection stage, testing a first driving current of the sub-pixels of each area surrounding the ith area under the condition that the sub-pixels of the ith area are not lightened; testing a first brightness value of the sub-pixels of the ith area and a second driving current of the sub-pixels of each area surrounding the ith area under the irradiation of the sub-pixels of the ith area when the sub-pixels of the ith area are in a lighting state, and recording the corresponding relation between the first brightness value and a first driving current change value, wherein the first driving current change value is the difference value between the first driving current and the second driving current, and i is less than or equal to n;
in the compensation stage, a third driving current of the sub-pixels surrounding each of the ith region is tested when the sub-pixels of the ith region are in an unlit state, a fourth driving current of the sub-pixels surrounding each of the ith region under the irradiation of the sub-pixels of the ith region is tested when the sub-pixels of the ith region are in an lit state, and the data voltage of the sub-pixels of the ith region is compensated according to the corresponding relation between the first brightness value and the first driving current change value and a second driving current change value, so as to adapt the brightness value of the sub-pixels of the ith region to the first brightness value, wherein the second driving current change value is a difference value of the third driving current and the fourth driving current.
2. The method of claim 1, wherein the detecting and the data voltage compensating are performed sequentially on the n regions of sub-pixels, so that the luminance values of the sub-pixels of each region are adapted to the first luminance value of the region.
3. The method of claim 1, wherein a ratio of a second luminance value of the sub-pixels of the ith region to the second driving current variation value during the compensation phase is equal to a ratio of the first luminance value to the first driving current variation value, and the data voltages of the sub-pixels of the ith region are compensated according to the first luminance value and the second luminance value.
4. The luminance compensation method of a display device according to claim 1, further comprising:
and controlling the sub-pixels of the ith area to display according to the data voltage compensation value of the sub-pixels of the ith area.
5. The method of claim 1, wherein a reflector is attached to the display area of the display panel to test the driving current of the sub-pixels surrounding each of the ith area under the irradiation of the sub-pixels of the ith area;
preferably, the reflector comprises a reflective film, and a reflective surface of the reflective film is attached to the display side of the display panel.
6. The method of claim 3, wherein compensating the data voltage of the sub-pixel of the ith area according to the first and second luminance values comprises:
adjusting the data voltage of the sub-pixels of the ith area according to the difference between the first brightness value and the second brightness value, and detecting the brightness value of the sub-pixels of the ith area;
if the brightness value of the sub-pixel of the ith area is not matched with the first brightness value, continuously adjusting the data voltage of the sub-pixel of the ith area according to the difference between the first brightness value and the brightness value of the sub-pixel of the ith area;
and if the brightness value of the sub-pixel of the ith area is matched with the first brightness value, determining a data voltage compensation value according to the data voltage of the sub-pixel of the ith area.
7. The luminance compensation method of a display device according to claim 1, wherein the data voltage compensation is performed on the subpixels of the n regions according to a compensation command from a user, or the data voltage compensation is performed on the subpixels of the n regions at a set interval.
8. The brightness compensation device of the display device is characterized by comprising a display panel, wherein the display panel is provided with a display area, the display area is divided into n areas, each area comprises at least one sub-pixel, and n is more than or equal to 2;
the brightness compensation apparatus of the display apparatus includes:
a detection module, configured to, in a detection phase, test a first driving current of a sub-pixel of each of an ith region when the sub-pixel of the ith region is in an unlighted state, test a first luminance value of the sub-pixel of the ith region when the sub-pixel of the ith region is in a lit state, and test a second driving current of the sub-pixel of each of the ith region when the sub-pixel of the ith region is illuminated, and record a corresponding relationship between the first luminance value and a first driving current variation value, where the first driving current variation value is a difference between the first driving current and the second driving current, and i is not greater than n;
a compensation module, configured to, in a compensation phase, test a third driving current of the sub-pixels surrounding each of the ith region when the sub-pixels of the ith region are in an unlighted state, test a fourth driving current of the sub-pixels surrounding each of the ith region when the sub-pixels of the ith region are in an lit state, and compensate the data voltage of the sub-pixels of the ith region according to a corresponding relationship between the first luminance value and the first driving current variation value and a second driving current variation value, so as to adapt the luminance value of the sub-pixels of the ith region to the first luminance value, where the second driving current variation value is a difference between the third driving current and the fourth driving current.
9. A display device for performing the luminance compensation method of the display device according to any one of claims 1 to 7, the display device comprising a display panel and a display driving module;
the display panel is provided with display areas which are divided into n areas, each area comprises at least one sub-pixel, and n is more than or equal to 2;
the display driving module is used for storing data voltage compensation values of the sub-pixels of the n regions.
10. The display device according to claim 9, wherein the display driving module is further configured to control the sub-pixels of the ith area to display according to the data voltage compensation value of the sub-pixels of the ith area.
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