CN114822418A - Temperature compensation method of display device and display device - Google Patents
Temperature compensation method of display device and display device Download PDFInfo
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- 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
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—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
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Abstract
The application provides a temperature compensation method of a display device and the display device, wherein a pixel compensation subarea in the display device covers at least one light adjustable area, and a plurality of light adjustable areas comprise at least two temperature detection areas; the temperature-dependent compensation method comprises the following steps: establishing an initial two-dimensional temperature distribution model according to the brightness signal of each light adjustable area, correcting the initial two-dimensional temperature distribution model according to the temperature signal received by the temperature sensor in each temperature detection area to obtain a two-dimensional temperature distribution model, obtaining an initial two-dimensional pixel compensation gain distribution model aiming at the light adjustable area according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table, and determining a two-dimensional pixel compensation gain distribution model aiming at the pixel compensation subarea according to the initial two-dimensional pixel compensation gain distribution model. According to the method and the device, the accurate temperature value and the accurate pixel compensation gain in each light adjustable area in the display device can be obtained.
Description
Technical Field
The present disclosure relates to display technologies, and particularly to a temperature compensation method for a display device and a display device.
Background
The image display quality of the display device is affected by temperature, for example, the color temperature of the image displayed in the higher temperature area of the display device is relatively cold compared with the color temperature of the image displayed in the lower temperature area, and the subjective effect is also relatively blue; when the display device has a plurality of areas with large temperature difference, the image picture of the display device has the problem of uneven color, and the subjective effect has dirty feeling.
One compensation scheme for temperature differences in the prior art is to obtain a temperature report of a temperature sensor at a central position of a display device; then, estimating the temperature value of each area of the display device according to the position distribution of the structure which can become the heat source in the display device, for example, the temperature value of the area with higher temperature is obtained by adding a specific temperature on the basis of the temperature report value, and the temperature value of the area with lower temperature is obtained by subtracting the specific temperature on the basis of the temperature report value of the temperature sensor at the central position; then acquiring temperature reports of all temperature sensors of the display device, and adopting processing modes such as discarding or interpolating for abnormal temperature reports; then, determining the temperature value of each area according to the effective temperature report value in the temperature report values of all the temperature sensors, wherein the process adopts the modes of global displacement, compression and the like; and finally, determining the compensation gain of each partition pixel according to the temperature value of each partition and compensating the pixel luminescence.
In the compensation scheme, the position of the structure which can serve as the heat source in the display device is a main factor for determining the temperature value of each partition and further determining the compensation gain of each partition, and the position of the structure which can serve as the heat source cannot accurately represent the temperature value of each partition, so the compensation effect performed according to the compensation scheme is poor. The problem of poor compensation effect of the compensation scheme is particularly obvious in the display device capable of being controlled in a partitioning manner because the temperature of each partition is different due to the light sources of each partition in the display device capable of being controlled in a partitioning manner, and the temperature of each partition depends on the brightness difference of the light sources in each partition.
Disclosure of Invention
The application provides a temperature compensation method of a display device and the display device, which aim to solve the problems.
In a first aspect, the present application provides a temperature compensation method for a display device, the display device including a display panel; the display panel comprises N light adjustable regions, wherein the N light adjustable regions comprise M temperature detection regions, and a temperature sensor is arranged in each region corresponding to the temperature detection regions in the display device, wherein N is more than or equal to M, and M is more than or equal to 2; the display panel further comprises K pixel compensation subareas, and one pixel compensation subarea is overlapped with at least one light adjustable area along the thickness direction of the display panel, wherein K is more than or equal to 2; the temperature compensation method comprises the steps of establishing an initial two-dimensional temperature distribution model of the display device according to brightness signals of all light adjustable regions, correcting the initial two-dimensional temperature distribution model according to temperature signals received by temperature sensors in all temperature detection regions to obtain a two-dimensional temperature distribution model of the display device, and obtaining an initial two-dimensional pixel compensation gain distribution model aiming at the light adjustable regions according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table; and determining a two-dimensional pixel compensation gain distribution model aiming at the pixel compensation subarea according to the initial two-dimensional pixel compensation gain distribution model.
In one implementation manner of the first aspect, establishing an initial two-dimensional temperature distribution model of the display device according to the brightness signals of the light adjustable regions includes recording the brightness signal L of the light adjustable region at the ith moment of the n positions i,n The set of the previous L moments closest to the current moment is U, and i belongs to U; the position set of the N ray adjustable areas is V, and N belongs to V; for luminance signal L in time domain i,n Weighted sum, T' n ＝f(∑ i∈U w i *L i,n ) Obtaining an initial temperature estimated value T 'of the light adjustable region at the n position' n (ii) a Wherein, w i For time-variant luminance signal L i,n The influence coefficient of (c).
In one implementation manner of the first aspect, the display panel includes a backlight panel, the backlight panel includes a plurality of independently controllable dimming regions, the light adjustable region of the display panel is a dimming region, and the luminance signal is a backlight luminance emitted by each dimming region of the backlight panel.
In an implementation manner of the first aspect, the display panel includes a plurality of pixels, the light adjustable region of the display panel is a region where the pixels are located, and the luminance signal is display luminance when each pixel performs image display.
In one implementation manner of the first aspect, the correcting the initial two-dimensional temperature distribution model according to the temperature signals received by the temperature sensors in the temperature detection areas to obtain the two-dimensional temperature distribution model of the display device includes recording the temperature signals T ″' received by the temperature sensors in the temperature detection areas at the m positions m Wherein M belongs to W, and W is a set of positions of M temperature detection regions in N light adjustable regions; according to the temperature signal T ″' of the temperature detection area m And initial temperature estimate T' m Determining a temperature correction weight T a (ii) a Wherein, T' m Belonging to S, wherein S is a set of initial temperature estimated values of M temperature detection regions; correcting the weight T according to the temperature a Initial temperature estimate T 'for light adjustable region at n position' n Correcting to obtain the temperature estimated value T of the light adjustable area at the n position n 。
In an implementation manner of the first aspect, obtaining an initial two-dimensional pixel compensation gain distribution model for the light adjustable region according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table includes determining an initial pixel compensation gain LG (T) of the light adjustable region at the n position according to the two-dimensional temperature distribution model and the preset temperature-pixel compensation gain lookup table n )。
In an implementation manner of the first aspect, determining, according to the initial two-dimensional pixel compensation gain distribution model, a two-dimensional pixel compensation gain distribution model for a pixel compensation partition includes determining, according to the initial two-dimensional pixel compensation gain distribution model, initial pixel compensation gains of a light adjustable region covered by a pixel compensation partition at a K position and at least two light adjustable regions adjacent to the pixel compensation partition at the K position, where a set of positions of K pixel compensation partitions is Z, and K belongs to Z; performing spatial filtering on initial pixel compensation gains of the light adjustable region covered by the pixel compensation partition at the k position and at least two light adjustable regions adjacent to the pixel compensation partition at the k position, wherein LG is used for k ＝∑ j∈x w j *LG(T j ) To obtain the pixel compensation gain LG at the k position k Which isIn (1), LG (T) j ) The method comprises the following steps that X belongs to X, wherein X is a set of initial pixel compensation gains of a light adjustable region covered by a pixel compensation partition at a k position and at least two light adjustable regions adjacent to the pixel compensation partition at the k position; w is a j Is the weight coefficient of the spatial position.
In one implementation of the first aspect, X is a set of initial pixel compensation gains for the light-adjustable region covered by the pixel compensation partition at the k position and all the light-adjustable regions adjacent to and surrounding the pixel compensation partition at the k position.
In a second aspect, the present application provides a display device, which can perform pixel compensation with temperature during a display process by using the compensation method with temperature provided in the first aspect; the display device comprises a display panel, a driving chip and a temperature sensor; the display panel comprises N light adjustable regions and K pixel compensation subareas, wherein the N light adjustable regions comprise M temperature detection regions, one pixel compensation subarea is overlapped with at least one light adjustable region along the thickness direction of the display panel, N is more than or equal to M, M is more than or equal to 2, and K is more than or equal to 2; the driving chip comprises a temperature compensation module and a driving unit, and the driving unit is used for driving the display panel to display images; the temperature sensor is disposed in a region corresponding to the temperature detection region in the display device. Wherein, along with temperature compensation module obtains temperature signal according to display panel luminance signal and sensor, obtains the compensation gain to each pixel compensation subregion of display panel, and concrete process includes: acquiring brightness signals of each light adjustable area of the display panel from the driving unit and establishing an initial two-dimensional temperature distribution model of the display device; acquiring temperature signals from temperature sensors arranged in each temperature detection area of the display panel and correcting the initial two-dimensional temperature distribution model to obtain a two-dimensional temperature distribution model of the display device; obtaining an initial two-dimensional pixel compensation gain distribution model aiming at a light adjustable area of the display panel according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table; a two-dimensional pixel compensation gain distribution model for a pixel compensation partition of the display panel is determined from the initial two-dimensional pixel compensation gain distribution model.
In one implementation manner of the second aspect, the display panel includes a backlight plate and a display screen, and the backlight plate emits backlight to the display screen; the backlight plate comprises a dimming area, the dimming area is used as a light adjustable area of the display panel, and backlight brightness emitted by the dimming area in the backlight plate is used as a brightness signal of the display panel; the driving unit comprises a display screen driving unit and a backlight driving unit, wherein the display screen driving unit is used for controlling the display screen to display, and the backlight plate driving unit is used for controlling the backlight plate to emit backlight to the display screen; the driving chip further comprises a partition dimming module, and the partition dimming module controls the backlight brightness of each dimming area through the backlight plate driving unit respectively.
In an implementation manner of the second aspect, the obtaining, from the driving unit, the luminance signal of each light-adjustable region of the display panel includes obtaining, by the divisional dimming module, a backlight driving signal of each dimming region in the backlight panel from the backlight driving unit, and processing the backlight driving signal in each dimming region to obtain a luminance signal corresponding to each dimming region, and the divisional dimming module transmits the obtained luminance signal to the temperature-dependent compensation module.
In an implementation manner of the second aspect, the obtaining, from the driving unit, the luminance signal of each light-adjustable region of the display panel includes obtaining, by the temperature-dependent compensation module, a backlight driving signal of each light-adjustable region in the backlight panel from the backlight driving unit, and processing the backlight driving signal in each light-adjustable region to obtain a luminance signal corresponding to each light-adjustable region.
In an implementation manner of the second aspect, the obtaining, from the driving unit, the luminance signal of each light-adjustable region of the display panel includes obtaining, by the temperature compensation module, a light-emitting driving signal of each light-adjustable region of the display screen from the display screen driving unit, predicting, according to the light-emitting driving signal, a backlight driving signal of each light-adjusting region of the backlight panel, and processing the backlight driving signal of each light-adjusting region to obtain the luminance signal corresponding to each light-adjusting region.
In a third aspect, the present application provides a display device, where the display device includes a display panel, the display panel includes N light-adjustable regions and K pixel compensation partitions, one pixel compensation partition overlaps at least one light-adjustable region in a thickness direction of the display panel, and each light-adjustable region is provided with a temperature sensor, where K is greater than or equal to 2, and N is greater than or equal to 2; the display device can establish a two-dimensional temperature distribution model of the display device according to temperature signals of the temperature sensors in the light adjustable regions, obtain an initial two-dimensional pixel compensation gain distribution model for the light adjustable regions according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table, and determine a two-dimensional pixel compensation gain distribution model for the pixel compensation partition according to the initial two-dimensional pixel compensation gain distribution model.
In the embodiment of the application, the display device firstly predicts the initial temperature of each light adjustable area through the brightness signal of each light adjustable area to establish an initial two-dimensional temperature distribution model, and then corrects the initial two-dimensional temperature distribution model by using the actual temperature signal obtained by the temperature sensor arranged in the partial light adjustable area, so that the more accurate temperature value in each light adjustable area can be obtained, and the more accurate pixel compensation gain can be obtained.
Drawings
Fig. 1 is a schematic plan view of a display panel in a display device according to an embodiment of the present disclosure;
fig. 2 is a schematic plan view of a display panel in another display device according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a display panel in a display device according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart illustrating a temperature compensation method of a display device according to an embodiment of the present disclosure;
fig. 5 is a schematic block diagram of a display device according to an embodiment of the present disclosure;
fig. 6 is a schematic block diagram of another display device according to an embodiment of the present disclosure;
fig. 7 is a schematic block diagram of another display device according to an embodiment of the present disclosure;
fig. 8 is a schematic block diagram of another display device according to an embodiment of the present disclosure;
fig. 9 is a schematic plan view of a display device according to an embodiment of the present application;
fig. 10 is a schematic plan view of a display device according to another embodiment of the present application.
Detailed Description
The terminology used in the description of the embodiments section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.
The embodiment of the application provides a temperature compensation method for a display device, which can be applied to various display devices with different display principles.
Fig. 1 is a schematic plan view of a display panel in a display device according to an embodiment of the present disclosure, and fig. 2 is a schematic plan view of a display panel in another display device according to an embodiment of the present disclosure.
As shown in fig. 1 and fig. 2, a display panel in the display device provided in the embodiment of the present application includes N light adjustable regions 01, and the light emitting brightness of each light adjustable region 01 is independently controllable. The N light adjustable regions 01 of the display panel comprise M temperature detection regions 01a, wherein N is more than or equal to M, and M is more than or equal to 2. The actual temperature of each temperature sensing area 01a can be sensed by the temperature sensor 20, and thus, the temperature sensing area 01a is a light adjustable area 01 in which the actual temperature in the display panel can be obtained.
At least one pixel 10 is disposed in the light adjustable region 01, so that the pixels 10 in each light adjustable region 01 can display images under the control of the light emitting driving signal of the display device.
Fig. 3 is a schematic view of a display panel in a display device according to an embodiment of the present disclosure.
In one application scenario of the present application, as shown in fig. 3, the display device may be a passive light emitting display device, that is, the display panel in the display device includes a backlight 001 and a display screen 002. For example, the display screen 002 is a liquid crystal display screen, the backlight board 001 can emit light to the display screen 002, and the display screen 002 controls the amount of light passing through the display screen 002, so that different gray scales can be displayed.
In one implementation, as shown in fig. 3, the backlight panel 001 includes a plurality of independently controllable dimming regions 010, that is, the brightness of different dimming regions 010 can be different, and when the brightness of any two dimming regions 010 is different, the image display brightness of two light adjustable regions 01 corresponding to the two dimming regions in the display panel is also different. Therefore, in this implementation, the dimming region 010 in the backlight 001 is the light adjustable region 01 of the display panel. When a part of the light adjustable area 01 of the display panel needs to display a dark picture, the light adjustable area 010 in the backlight board 001 can not emit light, so that the problem of light leakage is avoided, and the dark picture of the display device is darker; meanwhile, the dimming area 010 in the backlight board 001 can emit different brightness according to the gray scale of the image displayed by the corresponding light adjustable area 01 in the display panel, so that the contrast of the display device is improved.
It should be noted that each of the dimming regions 010 in the backlight 001 is actually a projection of the light adjustable region 01 of the display panel on the backlight, that is, one light adjustable region 01 in the display panel and the corresponding dimming region 010 in the backlight 001 are the same region in the display device.
Further, the backlight panel 001 is a direct type backlight, and the backlight panel 001 may specifically use a plurality of mini-LEDs (light emitting diodes) as light emitting sources, so that backlight driving of the mini-LEDs in different dimming areas 010 of the backlight panel 001 is independently controllable, so that light emitting brightness of each dimming area 010 is independently controllable.
In another implementation, the backlight panel 001 emits light uniformly over the entire surface, that is, the luminance of the backlight panel 001 may not be controlled in a partition manner, and the display luminance of each pixel 10 in the display screen 002 is also independently controllable, so the light adjustable region 01 of the display panel may correspond to the region of each pixel 10 in the display screen 002, that is, the region of each pixel 10 in the display screen 002 is the light adjustable region 01 of the display panel.
In another application scenario of the present application, the display device may also be an active light emitting display device, for example, the display device may be an organic light emitting diode display device, a micro diode display device, that is, the display panel of the display device includes an active light emitting device, such as an organic light emitting diode, a micro diode, and the like.
In the application scenario, since the display brightness of each pixel 10 in the display panel is also independently controllable, the light adjustable regions 01 of the display panel may correspond to the regions where each pixel 10 of the display panel is located one to one, that is, the regions where the pixels 10 of the display panel are located are the light adjustable regions 01 of the display panel.
In addition, the display device provided by the present application further includes a temperature sensor 20, the temperature sensor 20 is disposed in the temperature detection region 01a, and the temperature sensor 20 can sense the actual temperature in the temperature detection region 01a where it is located.
In one implementation, the temperature sensor 20 may be disposed in the display panel or on the surface of the display panel along the thickness direction of the display device, for example, the temperature sensor 20 is disposed on the backlight 001 of the display panel and located in the dimming region 010 corresponding to the temperature detection region 01a, or disposed on the display screen 002.
In another implementation, the temperature sensor 20 may also be disposed on the driving chip located at the back of the display panel along the thickness direction of the display device.
In the embodiment of the present application, the display panel further includes K pixel compensation partitions 02, and at least one pixel 10 is included in the pixel compensation partition 02, wherein the pixel 10 at least includes a red light emitting sub-pixel 11, a green light emitting sub-pixel 12, and a blue light emitting sub-pixel 13. The light-emitting sub-pixels of the same color in the pixel compensation division 02 can obtain uniform light-emitting compensation gain.
It should be noted that the light adjustable regions 01 and the pixel compensation sub-regions 02 are not separate regions, that is, one pixel compensation sub-region 02 overlaps at least one light adjustable region 01 along the thickness direction of the display panel.
In one implementation, the pixel compensation partition 02 covers at least one light adjustable region 01, i.e., K is greater than or equal to 2 and less than or equal to N. For example, as shown in FIG. 1, the pixel compensation partition 02 covers a plurality of light adjustable regions 01; as shown in fig. 2, the pixel compensation partition 02 covers a light adjustable area 01.
In another implementation, the light adjustable region 01 may also cover at least one pixel compensation partition 02, i.e., N is greater than or equal to 2 and less than or equal to K.
Fig. 4 is a schematic flow chart illustrating a temperature compensation method of a display device according to an embodiment of the present disclosure.
Referring to fig. 1, fig. 2 and fig. 4, a temperature compensation method for a display device according to an embodiment of the present disclosure includes:
step S01: establishing an initial two-dimensional temperature distribution model of the display device according to the brightness signals of the light adjustable areas 01;
step S02: correcting the initial two-dimensional temperature distribution model according to the temperature signals received by the temperature sensors 20 in the temperature detection areas 01a to obtain a two-dimensional temperature distribution model of the display device;
step S03: obtaining an initial two-dimensional pixel compensation gain distribution model aiming at the light adjustable area 01 according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table;
step S04: a two-dimensional pixel compensation gain distribution model for the pixel compensation partition 02 is determined from the initial two-dimensional pixel compensation gain distribution model.
In the embodiment of the application, the initial temperature of each light adjustable area 01 is estimated through the brightness signal of each light adjustable area 01, an initial two-dimensional temperature distribution model is established, the actual temperature signal obtained by the temperature sensor 20 arranged in part of the light adjustable area 01 is used for correcting the initial two-dimensional temperature distribution model, and therefore the accurate temperature value in each light adjustable area 01 can be obtained, and the accurate pixel compensation gain can be obtained.
In this embodiment, the specific step of establishing an initial two-dimensional temperature distribution model of the display device according to the brightness signal of each light adjustable region 01 may include:
s11: recording light at n positionLuminance signal L of adjustable region 01 at the ith moment i,n . The set of the previous L moments closest to the current moment is U, and i belongs to U; the position set of the N light adjustable regions 01 is V, and N belongs to V;
s12: for luminance signal L in time domain i,n Weighted sum, T' n ＝f(∑ i∈U w i *L i,n ) Obtaining an initial temperature estimated value T 'of the light adjustable region 01 at the n position' n Namely, an initial two-dimensional temperature distribution model of the display device is obtained. Wherein, w i For time-variant luminance signal L i,n The influence coefficient (w) can be obtained by testing the accumulated statistical value of a period of time and the w corresponding to the time which is generally closer to the current time i For brightness signal L i,n The greater the effect of (c).
For example, as illustrated in fig. 2, a set V { (1,1), (1,2), (1,3), (2,1), (2,2), (2,3), (3,1), (3,2), (3,3) }, L of the positions of the N light adjustable regions 01 is set to L i,(1,2) Is the luminance signal at the i-th time of the light adjustable region area 01 at the (1,2) position, T' (1,2) Is an initial temperature estimate of the optically tunable region 01 at the (1,2) position.
In this embodiment, the brightness signal is the brightness value of each light adjustable region 01, and the brightness signal can be determined by the driving signal when each light adjustable region 01 performs image display. For example, the luminance signal may be obtained by directly obtaining a driving signal for controlling each light adjustable region 01 to display an image by a driving chip, and determining the luminance signal according to the driving signal; or current feedbacks corresponding to the light adjustable regions 01 are added in the display device, the current feedbacks can reflect the corresponding current when the light adjustable regions 01 perform image display, and then the current of the current feedbacks can be used as the driving signal of the light adjustable regions 01, and the brightness signal is determined according to the light emitting driving signal.
When the display panel of the display device includes the backlight 001 and the dimming regions 010 of the backlight 001 are the light adjustable regions 01 of the display panel, the brightness signal is emitted from each dimming region 010 of the backlight 001Emitted backlight brightness, brightness signal L i,n The luminance of the backlight is emitted for the dimming region 010 at the n-position of the backlight panel 001 at the i-th time.
In one implementation, for determining the luminance signal L i,n Specifically, the backlight driving signal of the backlight 001 may be obtained, the backlight driving signal required by the backlight to be emitted by each of the dimming regions 010 of the backlight 001 when the display device displays an image is directly obtained, and the backlight driving signal in each of the dimming regions 010 is processed to obtain the luminance signal corresponding to each of the dimming regions 010, that is, the luminance signal of each of the light adjustable regions 01 of the display panel is obtained.
In another implementation manner, a current feedback device corresponding to each dimming region 010 of the backlight 001 is provided, a feedback current of the current feedback device corresponding to each dimming region 010 of the backlight 001 when the display device displays an image is obtained, and a luminance signal corresponding to each dimming region 010, that is, a luminance signal of each light-adjustable region 01 of the display panel, can be obtained by processing the feedback current of each dimming region 010.
In yet another implementation, the method is used for determining the luminance signal L i,n May be specifically a light emission driving signal when each pixel 10 of the display panel is driven to perform image display. The method includes the steps of obtaining light emitting driving signals of each light adjustable region 01 of the display screen 002 when the display device displays images, estimating backlight driving signals of each light adjustable region 010 corresponding to each light adjustable region 01 in the backlight panel 001 according to the light emitting driving signals, and processing the backlight driving signals in each light adjustable region 010 to obtain brightness signals corresponding to each light adjustable region 010.
One specific way to estimate the backlight driving signals of the dimming regions 010 corresponding to the light adjustable regions 01 in the backlight panel 001 according to the light emitting driving signals is to approximately obtain the backlight driving signals of the dimming regions 010 corresponding to the light adjustable regions 01 according to the y-power of the ratio of the gray scale value of the image displayed by the light adjustable region 01, which is greater than a certain percentage threshold, to the maximum gray scale value of the image displayed by the light adjustable region 01. Where y is a gamma value of the display device, and may be specifically 2.2.
When the area of each pixel 10 in the display panel of the display device is the light adjustable area 01 of the display panel, the luminance signal is the display luminance when each pixel 10 displays an image, and the luminance signal L is the display luminance when each pixel 10 displays an image i,n The display luminance of the pixel 10 at the n position of the display panel at the i-th time is shown.
In one implementation, for determining the luminance signal L i,n Specifically, the luminance signal corresponding to each pixel 10, that is, the luminance signal of each light-adjustable region 01 of the display panel, can be obtained by directly obtaining the light-emitting driving signal required by each pixel 10 of the display panel when the display device displays an image, and processing the light-emitting driving signal in each pixel 10.
In another implementation manner, a current feedback device corresponding to each pixel 10 is provided, a feedback current of the current feedback device corresponding to each pixel 10 of the display panel when the display device displays an image is obtained, and a luminance signal corresponding to each pixel 10, that is, a luminance signal of each light-adjustable region 01 of the display panel is obtained by processing the feedback current of each pixel 10.
In the technical solution of the present application, since the main heat source in the display device is a light-emitting structure, for example, a backlight source in a liquid crystal display panel, a light-emitting device in an organic light-emitting diode display device, and the like, a luminance signal of each light-adjustable area 01 can directly and relatively effectively reflect the temperature of each light-adjustable area 01. The estimated temperature value of each light adjustable area 01 can be obtained through an initial two-dimensional temperature distribution model established by the brightness signal of each light adjustable area 01.
The specific steps of correcting the initial two-dimensional temperature distribution model according to the temperature signals received by the temperature sensors 20 in the temperature detection regions 01a to obtain the two-dimensional temperature distribution model of the display device may include:
s21: the temperature signal T ″, received by the temperature sensor 20 in the temperature detection region 01a at the m-position, is recorded m . Wherein M belongs to W, and W is a set of positions of M temperature detection regions 01a in N light adjustable regions 01;
s22: according to the temperature signal T ″' of the temperature detection region 01a m And initial temperature estimate T' m Determining a temperature correction weight T a . Wherein, T' m Belonging to S, wherein S is a set of initial temperature estimated values of M temperature detection regions 01 a;
s23: correcting the weight T according to the temperature a Initial temperature estimate T 'for light tunable region 01 at n position' n Correction is carried out to obtain the temperature estimated value T of the light adjustable area 01 at the position of n n And obtaining the two-dimensional temperature distribution model of the display device.
Wherein, since the M temperature detection regions 01a are M light adjustable regions 01 of the N light adjustable regions 01 respectively, which are provided with the temperature sensors 20, then
For example, as illustrated in fig. 2, a set V of positions of N light-adjustable areas 01 { (1,1), (1,2), (1,3), (2,1), (2,2), (2,3), (3,1), (3,2), (3,3) }, and a set W of positions of M temperature detection areas 01a { (1,1), (1,3), (2,2), (3,1), (3,3) }, that is, the light-adjustable areas 01 at (1,1), (1,3), (2,2), (3,1), (3,3) positions in the N light-adjustable areas 01 are the temperature detection areas 01 a.
Wherein, the temperature signal T ″) m And initial temperature estimate T' m The temperature signal obtained by the temperature sensor 20 in one temperature detection region 01a and the initial temperature estimated value determined according to the brightness signal are respectively. For example, T ″) (1,1) And T ″) (1,1) An initial temperature estimate and a temperature signal, T ″, respectively, for the light adjustable region 01 at the (1,1) position (1,3) And T ″) (1,3) An initial temperature estimate and a temperature signal, T ″, respectively, for the light adjustable region 01 at the (1,3) position (2,2) And T (2,2) Light at the (2,2) position, respectivelyInitial temperature estimate and temperature signal, T ″, for the line-adjustable region 01 (3,1) And T ″) (3,1) An initial temperature estimate and a temperature signal, T ″, respectively, for the light adjustable region 01 at the (3,1) position (3,3) And T ″) (3,3) Respectively, an initial temperature estimate and a temperature signal for the optically tunable region 01 at the (3,3) position.
In one implementation of the present embodiment, the temperature correction weight T a Is based on the temperature signal T ″' of each temperature detection region 01a m And initial temperature estimate T' m The determined average temperature correction weight may be, for example,
initial temperature estimates T 'for light tunable regions 01 at various locations may be scaled with average temperature correction weights' n The correction may be performed by using the average temperature correction weight to estimate the initial temperature T 'of the light adjustable regions 01 other than the M temperature detection regions 01 a' n And (6) correcting.
Correcting the weight T by temperature a Initial temperature estimate T 'for light tunable region 01 at n position' n The specific way of performing the correction may be T n ＝T′ n *T a 。
In the technical scheme of the application, the temperature of the light adjustable area 01 without the temperature sensor 20 is corrected through the initial temperature estimation value of the light adjustable area 01 where the temperature sensor 20 is located and the temperature correction weight obtained from the actual temperature value, and a basis can be provided for obtaining the compensation gain of all the light adjustable areas 01.
In the embodiment of the present application, an initial two-dimensional pixel compensation gain distribution model for the light adjustable region 01 is obtained according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table, that is, an initial pixel compensation gain LG (T) in the light adjustable region 01 at n positions in the display device is determined n ) I.e. determining the initial pixel compensation gain in each light adjustable region 01 of the display device.
The pixel compensation gain is a gain that can compensate for the luminance of the pixels 10 of the display panel. For example, when the display panel is a liquid crystal display panel including the backlight panel 001, the pixel compensation gain is a compensation gain of a light emission driving signal that controls the deflection of liquid crystal molecules in the liquid crystal display panel 002.
In this embodiment of the application, the specific step of determining the two-dimensional pixel compensation gain distribution model for the pixel compensation partition 02 according to the initial two-dimensional pixel compensation gain distribution model may include:
s41: according to the initial two-dimensional pixel compensation gain distribution model, initial pixel compensation gains of the light adjustable region 01 covered by the pixel compensation partition 02 at the k position and at least two light adjustable regions 01 adjacent to the pixel compensation partition 02 at the k position are determined. The position set of K pixel compensation subareas 02 is Z, and K belongs to Z;
s42: spatially filtering the initial pixel compensation gains of the light-adjustable region 01 covered by the pixel compensation partition 02 at the k position and the at least two light-adjustable regions 01 adjacent to the pixel compensation partition 02 at the k position, i.e., LG k ＝∑ j∈x w j *LG(T j ) To obtain the pixel compensation gain LG at the k position k I.e. a two-dimensional pixel compensation gain distribution model for the pixel compensation partition 02 is determined. Wherein LG (T) j ) The method comprises the following steps that X belongs to X, wherein X is a set of initial pixel compensation gains of a light adjustable region 01 covered by a pixel compensation subarea 02 at a k position and at least two light adjustable regions 01 adjacent to the pixel compensation subarea 02 at the k position; w is a j Is the weight coefficient of the spatial position.
When a light-adjustable region 01 covers at least two pixel compensation partitions 02, then the pixel compensation gains LG corresponding to all the pixel compensation partitions 02 covered by the light-adjustable region 01 k The same is true. Then the initial pixel compensation gain sets X corresponding to all the pixel compensation partitions 02 covered by one light adjustable region 01 are the same when spatial filtering is performed.
When the pixel compensation partition 02 covers at least two light adjustable regions 01, the pixel compensation gain corresponding to the pixel compensation partition 02 is an average value of a plurality of pixel compensation gains obtained according to the initial pixel compensation gains corresponding to the light adjustable regions 01 covered by the pixel compensation partition 02.
In one implementation of this embodiment, X may be a set of initial pixel compensation gains of the light adjustable region 01 covered by the pixel compensation partition 02 at the k position and all the light adjustable regions 01 adjacent to and surrounding the pixel compensation partition 02 at the k position.
It will be appreciated that the pixel compensation gains corresponding to the pixels 10 in each pixel compensation partition 02 are the same, and the pixel compensation gains corresponding to the pixels 10 may include compensation gains for different color emitting sub-pixels 10, i.e., LG k ＝(R k ,G k ,B k ) Wherein R is k 、G k 、B k The compensation gains for the red emitting sub-pixel 11, the green emitting sub-pixel 12 and the blue emitting sub-pixel 13 within the pixel compensation partition 02 at the k position are respectively. For example, the compensation gains of the red light-emitting sub-pixel 11, the green light-emitting sub-pixel 12, and the blue light-emitting sub-pixel 13 in the pixel 10 may be different, but the compensation gains of the red light-emitting sub-pixel 11, the green light-emitting sub-pixel 12, and the blue light-emitting sub-pixel 13 in the same pixel compensation division 02 are the same.
The problem that the brightness display difference of the display device after compensation is obvious due to the fact that the compensation gain difference of the adjacent pixel compensation subareas 02 is large can be solved by performing spatial filtering on the initial two-dimensional pixel compensation gain distribution model.
The embodiment of the application further provides a display device, and the display device provided by the embodiment of the application can adopt the temperature-dependent compensation method provided by any one of the embodiments to perform temperature-dependent pixel compensation in the display process.
Fig. 5 is a schematic block diagram of a display device according to an embodiment of the present disclosure.
As shown in fig. 5, the display device provided in the embodiment of the present application includes a display panel 0001, a driving chip 0002 and a temperature sensor 0003, wherein the driving chip 0002 includes a temperature compensation module 00021 and a driving unit 00022, the temperature sensor 0003 is disposed in at least a portion of a light adjustable region 01 of the display panel, and the light adjustable region 01 having the temperature 0002 is referred to as a temperature detection region 01 a. A schematic plan view of the display device provided in this embodiment can be as shown in fig. 1 or fig. 2.
The driving unit 00022 in the driving chip 0002 is used for driving the display panel 0001 to display an image, the temperature compensation module 00021 is used for obtaining compensation gains of the compensation partitions 02 for each pixel of the display panel 0001 according to a luminance signal of the display panel 0001 for displaying the image and an actual temperature acquired by the sensor, and further, the driving unit 00022 is used for realizing light emission compensation of the display panel during image display.
The process of obtaining the compensation gain of the compensation partition 02 of different pixels of the display panel 0001 according to the temperature compensation module 00021 includes:
acquiring brightness signals of each light adjustable region 01 of the display panel 0001 from the driving unit 00022, and establishing an initial two-dimensional temperature distribution model of the display device;
acquiring temperature signals from temperature sensors 20 arranged in each temperature detection area 01a of the display panel, and correcting the initial two-dimensional temperature distribution model to obtain a two-dimensional temperature distribution model of the display device;
obtaining an initial two-dimensional pixel compensation gain distribution model aiming at the light adjustable region 01 of the display panel 0001 according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table;
from the initial two-dimensional pixel compensation gain distribution model, a two-dimensional pixel compensation gain distribution model for the pixel compensation partition 02 of the display panel 0001 is determined.
The driving chip 0002 is configured to perform brightness compensation on the pixels 10 in the pixel compensation partition 02 of the display panel 001 according to the two-dimensional pixel compensation gain distribution model calculated by the temperature compensation module 00021.
Fig. 6 is a schematic block diagram of another display device provided in an embodiment of the present application, fig. 7 is a schematic block diagram of another display device provided in the embodiment of the present application, and fig. 8 is a schematic block diagram of another display device provided in the embodiment of the present application.
As shown in fig. 6-8, the temperature-dependent compensation module 00021 includes a compensation gain determining module 21a and a pixel compensation module 21b, wherein the compensation gain determining module 21a is configured to determine a two-dimensional pixel compensation gain distribution model for the pixel compensation partition 02 of the display panel 0001; the pixel compensation module 21b is configured to send the light-emitting compensation gain signal to the driving unit 00022 according to the two-dimensional pixel compensation gain distribution model.
In one embodiment of the present application, the driving unit 00022 includes a display screen driving unit 22a and a backlight driving unit 22b, wherein the display screen driving unit 22a is used for controlling the display screen 002 to display, and the backlight driving unit 22b is used for controlling the backlight board 001 to emit backlight to the display screen 002. In addition, the driving chip 0002 further includes a partition dimming module 0023, and the partition dimming module 0023 can control the backlight brightness of each dimming region 010 of the backlight 001 through the backlight driving unit 22 b. In an alternative manner, the partition dimming module 0023 may further calculate a compensation gain for the display screen 002 according to the brightness of each dimming region 010 in the backlight panel 001, and perform light emission compensation on the display screen 002 through the display screen driving unit 22 a.
In this embodiment, each dimming region 010 in the backlight panel 001 can be used as each light-adjustable region 01 of the display panel 0001, and the backlight brightness emitted by each dimming region 010 in the backlight panel 001 can be used as the brightness signal of the display panel. Then, the temperature compensation module 00021 obtains the luminance signal of each light adjustable region 01 of the display panel 0001 from the driving unit 00022, that is, the temperature compensation module 00021 obtains the backlight luminance signal of each light adjustable region 010 of the backlight panel 001 from the driving unit 00022.
In an implementation manner of the embodiment, as shown in fig. 6, the temperature compensation module 00021 may obtain a backlight brightness value of each dimming region 010 of the backlight panel 001 through the partition dimming module 0023. Specifically, the partition dimming module 0023 obtains the backlight driving signal of each dimming region 010 of the backlight panel 001 from the backlight driving unit 22b, and processes the backlight driving signal in each dimming region 010 to obtain the luminance signal corresponding to each dimming region 010; then, the subarea dimming module 0023 transmits the obtained brightness signal to a compensation gain determining module 21a of the temperature compensation module 00021; the compensation gain determination module 21a establishes an initial two-dimensional temperature distribution model of the display device based on the received luminance signal.
In another implementation manner of the embodiment, as shown in fig. 7 and 8, the temperature compensation module 00021 may obtain the backlight luminance signals of the dimming regions 010 of the backlight panel 001 from the driving unit 00022.
In a specific implementation manner, as shown in fig. 7, the compensation gain determining module 21a of the temperature compensation module 00021 obtains the backlight driving signal of each dimming region 010 of the backlight 001 from the backlight driving unit 22b, processes the backlight driving signal in each dimming region 010 to obtain a luminance signal corresponding to each dimming region 010, and then establishes an initial two-dimensional temperature distribution model of the display device.
In another specific implementation manner, as shown in fig. 8, the compensation gain determining module 0021 of the temperature compensation module 00021 obtains the light emitting driving signals of each light adjustable region 01 of the display screen 002 from the display screen driving unit 22a, estimates the backlight driving signals of each dimming region 010 of the backlight panel 001 according to the light emitting driving signals, processes the backlight driving signals in each dimming region 010 to obtain the luminance signals corresponding to each dimming region 010, and then establishes an initial two-dimensional temperature distribution model of the display device.
Fig. 9 is a schematic plan view of a display device according to an embodiment of the present application, and fig. 10 is a schematic plan view of a display device according to another embodiment of the present application.
As shown in fig. 9 and 10, the display panel included in the display device of the present embodiment includes a backlight 001 and a display screen 002. The display panel in the display device provided by the embodiment of the application comprises N light adjustable areas 01, wherein at least one pixel 10 is arranged in each light adjustable area 01, and the brightness of each light adjustable area 01 is independently controllable. The display panel further comprises K pixel compensation sub-regions 02, wherein at least one pixel 10 is included in the pixel compensation sub-region 02, and the pixel 10 at least comprises a red light-emitting sub-pixel 11, a green light-emitting sub-pixel 12 and a blue light-emitting sub-pixel 13. The light-emitting sub-pixels of the same color in the pixel compensation division 02 can obtain uniform light-emitting compensation gain. It should be noted that the light adjustable region 01 and the pixel compensation division 02 are not separate regions independent from each other. In one implementation, as shown in FIG. 9, the pixel compensation partition 02 covers a plurality of light adjustable regions 01; in another implementation, as shown in FIG. 10, the pixel compensation partition 02 covers a light adjustable region 01. Namely K is more than or equal to 2 and less than or equal to N.
The backlight panel 001 includes a plurality of dimming regions 010 that are independently controllable, each dimming region 010 is independently controllable, that is, the brightness between each dimming region 010 may be different, and when the brightness of any two dimming regions 010 is different, the image display brightness of two light adjustable regions 01 corresponding to the two dimming regions in the display panel is also different.
Therefore, in this implementation, the dimming region 010 in the backlight 001 is the light adjustable region 01 of the display panel. When a part of the light adjustable area 01 of the display panel needs to display a dark picture, the light adjustable area 010 in the backlight board 001 does not emit light, so that the problem of light leakage is avoided, and the dark picture of the display device is darker; meanwhile, the dimming area 010 in the backlight plate 001 can emit different brightness according to the gray scale of the image displayed by the corresponding light adjustable area 01 in the display panel, so that the contrast of the display device is improved. It should be noted that each of the dimming regions 010 in the backlight 001 is actually a projection of the light adjustable region 01 of the display panel on the backlight, that is, one light adjustable region 01 in the display panel and the corresponding dimming region 010 in the backlight 001 are the same region in the display device.
The present embodiment provides a display device in which each light adjustable region 01 of the display panel 0001 is provided with a temperature sensor 20. The display device can establish a two-dimensional temperature distribution model of the display device according to the temperature signals of the temperature sensors 20 in each light adjustable area 01; obtaining an initial two-dimensional pixel compensation gain distribution model aiming at the light adjustable area 01 according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table; and a two-dimensional pixel compensation gain distribution model for the pixel compensation partition 02 is determined from the initial two-dimensional pixel compensation gain distribution model.
The process of obtaining an initial two-dimensional pixel compensation gain distribution model for the light adjustable region 01 and determining a two-dimensional pixel compensation gain distribution model for the pixel compensation partition 02 is the same as the method provided in any of the above embodiments, and is not described herein again.
In this embodiment, the accurate temperature value of each light adjustable region 01 can be obtained, so that the accurate light emission compensation gain of each light adjustable region 01 can be obtained, and an excellent light emission compensation effect along with the temperature is achieved.
The above description is only for the specific embodiments of the present application, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered by the protection scope of the present application. The protection scope of the present application shall be subject to the protection scope of the claims.
Claims (14)
1. The temperature compensation method of a display device is characterized in that the display device comprises a display panel;
the display panel comprises N light adjustable regions, the N light adjustable regions comprise M temperature detection regions, and a temperature sensor is arranged in each region of the display device corresponding to the temperature detection regions, wherein N is more than or equal to M, and M is more than or equal to 2;
the display panel further comprises K pixel compensation subareas, and one pixel compensation subarea is overlapped with at least one light adjustable area along the thickness direction of the display panel, wherein K is more than or equal to 2;
the temperature compensation method comprises the following steps:
establishing an initial two-dimensional temperature distribution model of the display device according to the brightness signal of each light adjustable area;
correcting the initial two-dimensional temperature distribution model according to the temperature signals received by the temperature sensors in the temperature detection areas to obtain a two-dimensional temperature distribution model of the display device;
obtaining an initial two-dimensional pixel compensation gain distribution model aiming at the light adjustable area according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table;
and determining a two-dimensional pixel compensation gain distribution model aiming at the pixel compensation subarea according to the initial two-dimensional pixel compensation gain distribution model.
2. The temperature-dependent compensation method as claimed in claim 1, wherein the establishing an initial two-dimensional temperature distribution model of the display device according to the brightness signal of each of the light adjustable regions comprises:
recording the brightness signal L of the light adjustable area at the ith moment at the n position i,n (ii) a The set of the previous L moments closest to the current moment is U, and i belongs to U; the position set of the N ray adjustable areas is V, and N belongs to V;
for the luminance signal L in the time domain i,n Weighted sum, T' n ＝f(∑ i∈U w i *L i,n ) Obtaining an initial temperature estimation value T 'of the light adjustable area at the n position' n (ii) a Wherein, w i For time-variant luminance signal L i,n The influence coefficient of (c).
3. The temperature-dependent compensation method of claim 2, wherein the display panel comprises a backlight panel, the backlight panel comprises a plurality of independently controllable dimming regions, and the light adjustable region of the display panel is the dimming region;
the brightness signal is the backlight brightness emitted by each dimming area of the backlight plate.
4. The compensation method as claimed in claim 2, wherein the display panel comprises a plurality of pixels, and the light adjustable region of the display panel is a region where the pixels are located;
the luminance signal is display luminance when each of the pixels performs image display.
5. The compensation method as claimed in claim 2, wherein the step of modifying the initial two-dimensional temperature distribution model according to the temperature signals received by the temperature sensors in the temperature detection regions to obtain a two-dimensional temperature distribution model of the display device comprises:
recording a temperature signal T ″' received by the temperature sensor in the temperature detection region at the m position m (ii) a Wherein M belongs to W, and W is a set of positions of the M temperature detection regions in the N light adjustable regions;
according to the temperature signal T' of the temperature detection area m And initial temperature estimate T' m Determining a temperature correction weight T a (ii) a Wherein, T' m E is S, and S is a set of the initial temperature estimation values of the M temperature detection regions;
correcting the weight T according to the temperature a The initial temperature estimate T 'for the light adjustable region at the n position' n Correcting to obtain the temperature estimated value T of the light adjustable area at the n position n 。
6. The compensation method as claimed in claim 5, wherein the obtaining an initial two-dimensional pixel compensation gain distribution model for the light adjustable region according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table comprises:
determining the n position according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup tableInitial pixel compensation gain LG (T) of the light adjustable region n )。
7. The temperature-dependent compensation method of claim 6, wherein determining a two-dimensional pixel compensation gain distribution model for the pixel compensation partition from the initial two-dimensional pixel compensation gain distribution model comprises:
determining the light adjustable region covered by the pixel compensation subarea at the k position and the initial pixel compensation gains of at least two light adjustable regions adjacent to the pixel compensation subarea at the k position according to the initial two-dimensional pixel compensation gain distribution model; the position set of K pixel compensation subareas is Z, and K belongs to Z;
spatially filtering the initial pixel compensation gains of the light-adjustable region covered by the pixel compensation partition at the k-position and the at least two light-adjustable regions adjacent to the pixel compensation partition at the k-position LG k ＝∑ j∈X w j *LG(T j ) Obtaining the pixel compensation gain LG at the k position k (ii) a Wherein LG (T) j ) E X, X being the set of initial pixel compensation gains for the ray-tunable regions covered by the pixel compensation partition at the k position and the at least two ray-tunable regions adjacent to the pixel compensation partition at the k position; w is a j Is the weight coefficient of the spatial position.
8. The compensation method as claimed in claim 7, wherein X is a set of the initial pixel compensation gains of the light adjustable region covered by the pixel compensation partition at the k position and all the light adjustable regions adjacent to and surrounding the pixel compensation partition at the k position.
9. A display device, wherein the temperature-dependent pixel compensation method provided in any one of claims 1 to 8 can be applied to the display device during the display process, and the display device comprises:
a display panel including N light adjustable regions and K pixel compensation zones; the N light adjustable regions comprise M temperature detection regions, and one pixel compensation partition is overlapped with at least one light adjustable region along the thickness direction of the display panel; wherein N is more than or equal to M, M is more than or equal to 2, and K is more than or equal to 2;
the driving chip comprises a temperature compensation module and a driving unit, and the driving unit is used for driving the display panel to display images;
a temperature sensor disposed in a region of the display device corresponding to the temperature detection region;
the temperature-dependent compensation module obtains compensation gains for the pixel compensation subareas of the display panel according to the display panel brightness signal and the temperature signal acquired by the sensor, and the specific process comprises the following steps:
acquiring the brightness signal of each light adjustable area of the display panel from the driving unit, and establishing an initial two-dimensional temperature distribution model of the display device;
acquiring temperature signals from the temperature sensors arranged in the temperature detection areas of the display panel, and correcting the initial two-dimensional temperature distribution model to obtain a two-dimensional temperature distribution model of the display device;
obtaining an initial two-dimensional pixel compensation gain distribution model for the light adjustable area of the display panel according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table;
determining a two-dimensional pixel compensation gain distribution model for the pixel compensation partition of the display panel according to the initial two-dimensional pixel compensation gain distribution model.
10. The display device according to claim 9,
the display panel comprises a backlight plate and a display screen, and the backlight plate emits backlight to the display screen; the backlight plate comprises a dimming area, and the dimming area is used as the light adjustable area of the display panel; the backlight brightness emitted by the dimming area in the backlight plate is used as the brightness signal of the display panel;
the driving unit comprises a display screen driving unit and a backlight driving unit, wherein the display screen driving unit is used for controlling the display screen to display, and the backlight plate driving unit is used for controlling the backlight plate to emit backlight to the display screen;
the driving chip further comprises a partition dimming module, and the partition dimming module controls the backlight brightness of each dimming area through the backlight plate driving unit.
11. The display device according to claim 10, wherein the obtaining the brightness signal of each of the light adjustable regions of the display panel from the driving unit comprises:
the partition dimming module acquires a backlight driving signal of each dimming area in the backlight board from the backlight driving unit and processes the backlight driving signal in each dimming area to obtain the brightness signal corresponding to each dimming area;
and the partition dimming module transmits the obtained brightness signal to the temperature compensation module.
12. The display device according to claim 10, wherein the obtaining the brightness signal of each of the light adjustable regions of the display panel from the driving unit comprises:
the temperature-dependent compensation module acquires backlight driving signals of all dimming areas in the backlight plate from the backlight plate driving unit, and processes the backlight driving signals in all the dimming areas to obtain the brightness signals corresponding to all the dimming areas.
13. The display device according to claim 10, wherein the obtaining the brightness signal of each light adjustable region of the display panel from the driving unit comprises:
the temperature-dependent compensation module acquires a light-emitting driving signal of each light-adjustable area of the display screen from the display screen driving unit, estimates a backlight driving signal of each light-adjusting area of the backlight plate according to the light-emitting driving signal, and processes the backlight driving signal in each light-adjusting area to obtain a brightness signal corresponding to each light-adjusting area.
14. A display device, characterized in that the display device comprises: a display panel including N light adjustable regions and K pixel compensation zones; in the thickness direction of the display panel, one pixel compensation subarea is overlapped with at least one light adjustable area; temperature sensors are arranged in the light adjustable areas, wherein K is more than or equal to 2, and N is more than or equal to 2;
the display device can establish a two-dimensional temperature distribution model of the display device according to the temperature signals of the temperature sensors in the light adjustable areas; obtaining an initial two-dimensional pixel compensation gain distribution model aiming at the light adjustable area according to the two-dimensional temperature distribution model and a preset temperature-pixel compensation gain lookup table; and determining a two-dimensional pixel compensation gain distribution model aiming at the pixel compensation subarea according to the initial two-dimensional pixel compensation gain distribution model.
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