Display processing method and apparatus, and display device

Abstract

A display processing method and apparatus, and a display device, which belong to the technical field of display. The display processing apparatus is applied to a display device, wherein a display region of the display device comprises color sub-pixels and white sub-pixels. The apparatus comprises: an acquisition module (61), which is used for acquiring a first value of at least one first parameter of a preset region of a display region when a display device is in a video playing state, wherein the first parameter corresponds to a drive transistor of a pixel drive circuit of the preset region, and the value of the first parameter is in direct proportion to a threshold value voltage of the corresponding drive transistor; and acquiring a second value of each first parameter after a first preset time period elapses; a determination module (62), which is used for determining a target region according to a difference value between the second value and the first value, wherein difference values of at least some first parameters of the target region are greater than a first preset threshold value; and a processing module (63), which is used for reducing the brightness of color sub-pixels of the target region. The display processing apparatus can eliminate burn-in of a display device.

Description

Display processing method, device and display equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202310757728.8 filed in China on June 25, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of display technology, and in particular to a display processing method, apparatus, and display device. Background Art

[0004] OLED (Organic Light-Emitting Diode) display devices have been listed as a next-generation display technology with great development prospects due to their advantages such as thinness, lightness, wide viewing angle, active luminescence, continuously adjustable luminous color, low cost, fast response speed, low energy consumption, low driving voltage, wide operating temperature range, simple production process, high luminous efficiency and flexible display.

[0005] In the related technology, OLED display devices include color sub-pixels and white sub-pixels. The color sub-pixels are realized by setting a color film layer on the light-emitting side of the white sub-pixels. Compared with the white sub-pixels, the brightness loss of the color sub-pixels is relatively large. In order to achieve the preset brightness, the color sub-pixels consume more power. In some always-on areas such as the logo area, the high power consumption of the color sub-pixels causes the temperature of the area to rise rapidly, and the temperature difference with other areas is large, resulting in obvious afterimages.

[0006] Summary of the Invention

[0007] The technical problem to be solved by the present disclosure is to provide a display processing method, apparatus and display device, which can eliminate the afterimage of the display device.

[0008] To solve the above technical problems, the embodiments of the present disclosure provide the following technical solutions:

[0009] In one aspect, a display processing apparatus is provided, which is applied to a display device, wherein a display area of ​​the display device includes color sub-pixels and white sub-pixels, and the apparatus includes:

[0010] an acquisition module, configured to, when the display device is in a video playback state, acquire a first value of at least one first parameter of a preset area of ​​the display area, the first parameter corresponding to a driving transistor of a pixel driving circuit in the preset area, the value of the first parameter being proportional to a threshold voltage of the corresponding driving transistor; and acquire a second value of each first parameter after a first preset time period;

[0011] a determining module, configured to determine a target area according to a difference between the second value and the first value, wherein the difference of at least part of the first parameters of the target area is greater than a first preset threshold;

[0012] The processing module is configured to reduce the brightness of the color sub-pixels in the target area.

[0013] In some embodiments, the processing module is further configured to increase the brightness of the white sub-pixels in the target area while decreasing the brightness of the color sub-pixels in the target area.

[0014] In some embodiments, the target area satisfies at least one of the following:

[0015] The differences of all first parameters in the target area are greater than a first preset threshold;

[0016] The difference of some first parameters within the target area is greater than a first preset threshold;

[0017] An average value of the differences of all first parameters within the target area is greater than a first preset threshold.

[0018] In some embodiments, the pixel driving circuit includes a data writing circuit, a driving circuit, an external control compensation circuit, and a storage capacitor, the data writing circuit includes a first transistor, a gate of the first transistor is connected to a first gate line, a first electrode of the first transistor is connected to a data line, and a second electrode of the first transistor is connected to a first node;

[0019] The external compensation control circuit includes a second transistor, a gate of the second transistor is connected to the second gate line, a first electrode of the second transistor is connected to the compensation control line, and a second electrode of the second transistor is connected to the second node;

[0020] The driving circuit includes a driving transistor, a gate of the driving transistor is connected to the first node, a first electrode of the driving transistor is connected to the high-level signal line, and a second electrode of the driving transistor is connected to the second node;

[0021] The first plate of the storage capacitor is connected to the first node, and the second plate of the storage capacitor is connected to the second node;

[0022] The display stage of the display device includes four stages:

[0023] In the first stage, a high potential electrical signal is input to the first gate line and the second gate line;

[0024] In the second stage, a low potential electric signal is input to the first gate line, a high potential electric signal is input to the second gate line, and the potential of the electric signal input to the compensation control line gradually increases;

[0025] In the third stage, a low potential electric signal is input to the first gate line, a high potential electric signal is input to the second gate line, and a high potential electric signal is input to the compensation control line;

[0026] In the fourth stage, a high potential electrical signal is input to the first gate line and the second gate line, and a low potential electrical signal is input to the compensation control line;

[0027] The acquisition module is specifically configured to acquire a voltage signal of the second node in the third stage, and convert the voltage signal into a value of the first parameter.

[0028] In some embodiments, the display area is divided into a plurality of sub-areas arranged in an array, and the preset area includes at least one of the sub-areas.

[0029] In some embodiments, the preset area includes four sub-areas located at the corners of the display area.

[0030] In some embodiments, the processing module is further used to repeat the step of obtaining the difference after reducing the brightness of the colored sub-pixels of the target area, and restore the brightness of the colored sub-pixels of the target area when the difference is less than a second preset threshold for n consecutive times, where n is an integer greater than 2, and the second preset threshold is less than the first preset threshold.

[0031] In some embodiments, the processing module is further used to reduce the brightness of the colored sub-pixels of the target area and increase the brightness of the white sub-pixels of the target area after a second preset time period, and repeat the step of obtaining the difference, and restore the brightness of the colored sub-pixels and / or white sub-pixels of the target area when the difference is less than a second preset threshold for n consecutive times, where n is an integer greater than 2, and the second preset threshold is less than the first preset threshold.

[0032] In some embodiments, the processing module is also used to, after reducing the brightness of the colored sub-pixels of the target area and increasing the brightness of the white sub-pixels of the target area, cyclically execute the steps of reducing and increasing the brightness of the colored sub-pixels and / or white sub-pixels of the target area after a second preset time period, and repeat the step of obtaining the difference, and restore the brightness of the colored sub-pixels and / or white sub-pixels of the target area when the difference is less than a second preset threshold value for n consecutive times, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

[0033] An embodiment of the present disclosure further provides a display device, comprising the display processing apparatus as described above.

[0034] The present disclosure also provides a display processing method, which is applied to a display device, wherein a display area of ​​the display device includes color sub-pixels and white sub-pixels. The method includes:

[0035] When the display device is in a video playback state, obtaining a first value of at least one first parameter of a preset area of ​​the display area, where the first parameter corresponds to a driving transistor of a pixel driving circuit in the preset area, and the value of the first parameter is proportional to a threshold voltage of the corresponding driving transistor;

[0036] After a first preset time period, obtaining a second value of each of the first parameters;

[0037] determining a target area according to a difference between the second value and the first value, wherein the difference of at least part of the first parameters of the target area is greater than a first preset threshold;

[0038] The brightness of the color sub-pixels in the target area is reduced.

[0039] In some embodiments, while reducing the brightness of the color sub-pixels in the target area, the method further includes:

[0040] The brightness of the white sub-pixels in the target area is increased.

[0041] In some embodiments, the target area satisfies at least one of the following:

[0042] The differences of all first parameters in the target area are greater than a first preset threshold;

[0043] The difference of some first parameters within the target area is greater than a first preset threshold;

[0044] An average value of the differences of all first parameters within the target area is greater than a first preset threshold.

[0045] In some embodiments, the pixel driving circuit includes a data writing circuit, a driving circuit, an external control compensation circuit, and a storage capacitor, the data writing circuit includes a first transistor, a gate of the first transistor is connected to a first gate line, a first electrode of the first transistor is connected to a data line, and a second electrode of the first transistor is connected to a first node;

[0046] The external compensation control circuit includes a second transistor, a gate of the second transistor is connected to the second gate line, a first electrode of the second transistor is connected to the compensation control line, and a second electrode of the second transistor is connected to the second node;

[0047] The driving circuit includes a driving transistor, a gate of the driving transistor is connected to the first node, a first electrode of the driving transistor is connected to the high-level signal line, and a second electrode of the driving transistor is connected to the second node;

[0048] The first plate of the storage capacitor is connected to the first node, and the second plate of the storage capacitor is connected to the second node;

[0049] The display stage of the display device includes four stages:

[0050] In the first stage, a high potential electrical signal is input to the first gate line and the second gate line;

[0051] In the second stage, a low potential electric signal is input to the first gate line, a high potential electric signal is input to the second gate line, and the potential of the electric signal input to the compensation control line gradually increases;

[0052] In the third stage, a low potential electric signal is input to the first gate line, a high potential electric signal is input to the second gate line, and a high potential electric signal is input to the compensation control line;

[0053] In the fourth stage, a high potential electrical signal is input to the first gate line and the second gate line, and a low potential electrical signal is input to the compensation control line;

[0054] Wherein, obtaining the value of at least one first parameter of the preset area of ​​the display area includes:

[0055] In the third stage, a voltage signal of the second node is acquired, and the voltage signal is converted into a value of the first parameter.

[0056] In some embodiments, the display area is divided into a plurality of sub-areas arranged in an array, and the preset area includes at least one of the sub-areas.

[0057] In some embodiments, the preset area includes four sub-areas located at the corners of the display area.

[0058] In some embodiments, the length of the sub-region does not exceed one quarter of the length of the display region, and the width of the sub-region does not exceed one quarter of the width of the display region.

[0059] In some embodiments, after reducing the brightness of the color sub-pixels in the target area, the method further includes:

[0060] Repeat the step of obtaining the difference, and restore the brightness of the color sub-pixel of the target area when the difference is less than a second preset threshold for n consecutive times, where n is an integer greater than 2, and the second preset threshold is less than the first preset threshold.

[0061] In some embodiments, after reducing the brightness of the color sub-pixels in the target area and increasing the brightness of the white sub-pixels in the target area, the method further includes:

[0062] After a second preset time period, the brightness of the colored sub-pixels and / or white sub-pixels in the target area is reduced, and the step of obtaining the difference is repeated. When the difference is less than a second preset threshold value for n consecutive times, the brightness of the colored sub-pixels and / or white sub-pixels in the target area is restored, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

[0063] In some embodiments, after reducing the brightness of the color sub-pixels in the target area and increasing the brightness of the white sub-pixels in the target area, the method further includes:

[0064] After a second preset time period, the steps of reducing and increasing the brightness of the colored sub-pixels and / or white sub-pixels of the target area are cyclically performed, and the step of obtaining the difference is repeated. When the difference is less than a second preset threshold value for n consecutive times, the brightness of the colored sub-pixels and / or white sub-pixels of the target area is restored, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

[0065] The embodiments of the present disclosure have the following beneficial effects:

[0066] In the above scheme, when the target area is in the display state for a long time, the value of the first parameter of the target area will change significantly. By detecting the value of the first parameter, it is possible to detect whether the target area is in the display state for a long time. If the target area is in the display state for a long time, the temperature difference between the target area and other areas will be relatively large, and afterimages are likely to appear. Therefore, the brightness of the color sub-pixels in the target area can be reduced, thereby reducing the power consumption and current density of the target area, narrowing the temperature difference between the target area and other areas, and eliminating afterimages. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] FIG1 is a flow chart of a display processing method according to an embodiment of the present disclosure;

[0068] 2a and 2b are schematic diagrams of a pixel driving circuit according to an embodiment of the present disclosure;

[0069] FIG3 is a schematic diagram of the display stage of an embodiment of the present disclosure;

[0070] FIG4 is a schematic diagram of a display screen of a display device;

[0071] FIG5 is a schematic diagram of four sub-areas at the corner positions of a display area according to an embodiment of the present disclosure;

[0072] FIG6 is a schematic diagram of first values ​​of multiple sub-regions according to an embodiment of the present disclosure;

[0073] FIG7 is a schematic diagram of second values ​​of multiple sub-regions according to an embodiment of the present disclosure;

[0074] FIG8 is a flowchart of a specific example display processing method of the present disclosure;

[0075] FIG9 is a flow chart showing another specific example of a processing method according to the present disclosure;

[0076] FIG10 is a flowchart of another specific example of a display processing method of the present disclosure;

[0077] FIG11 is a flowchart of a display processing method according to another specific example of the present disclosure;

[0078] FIG12 is a structural block diagram of a display processing device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0079] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present disclosure more clear, they will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0080] Embodiments of the present disclosure provide a display processing method, apparatus, and display device, which can eliminate afterimages in a display device.

[0081] An embodiment of the present disclosure provides a display processing method, which is applied to a display device, wherein a display area of ​​the display device includes color sub-pixels and white sub-pixels. As shown in FIG1 , the method includes:

[0082] Step 101: When the display device is in a video playback state, obtaining a first value of at least one first parameter of a preset area of ​​the display area, where the first parameter corresponds to a driving transistor of a pixel driving circuit in the preset area, and the value of the first parameter is proportional to a threshold voltage of the corresponding driving transistor;

[0083] Specifically, the first parameter corresponds one-to-one to the driving transistors of the pixel driving circuit in the preset area, and each driving transistor has a first parameter.

[0084] Step 102: After a first preset time period, obtain a second value of each of the first parameters;

[0085] Step 103: determining a target area based on the difference between the second value and the first value, wherein the difference of at least part of the first parameter in the target area is greater than a first preset threshold value, and the first preset threshold value can be set as needed. When the difference of the first parameter is greater than the first preset threshold value, a relatively large change occurs in the threshold voltage of the driving transistor;

[0086] Step 104: Reduce the brightness of the color sub-pixels in the target area.

[0087] In this embodiment, the color sub-pixels may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the light emitted by the color sub-pixels can be mixed into white light.

[0088] In this embodiment, when the target area is in the display state for a long time, the value of the first parameter of the target area will change significantly. By detecting the value of the first parameter, it is possible to detect whether the target area is in the display state for a long time. If the target area is in the display state for a long time, the temperature difference between the target area and other areas will be relatively large, and afterimages are likely to appear. Therefore, the brightness of the color sub-pixels in the target area can be reduced, thereby reducing the power consumption and current density of the target area, narrowing the temperature difference between the target area and other areas, and eliminating afterimages.

[0089] In some embodiments, while reducing the brightness of the color sub-pixels in the target area, the method further includes:

[0090] Increase the brightness of the white sub-pixels in the target area. To ensure the overall brightness of the target area, while reducing the brightness of the color sub-pixels in the target area, it is also necessary to increase the brightness of the white sub-pixels in the target area accordingly, so that the human eye will not clearly perceive the brightness changes in the target area.

[0091] In this embodiment, as shown in FIG2a and FIG2b, the pixel driving circuit includes a data writing circuit, a driving circuit, an external control compensation circuit and a storage capacitor, the data writing circuit includes a first transistor (T1), a gate of the first transistor (T1) is connected to a first gate line (G1), a first electrode of the first transistor (T1) is connected to a data line (DATA), and a second electrode of the first transistor (T1) is connected to a first node (G);

[0092] The external compensation control circuit comprises a second transistor (T2), a gate of the second transistor (T2) is connected to a second gate line (G2), a first electrode of the second transistor (T2) is connected to a compensation control line (SENSE), and a second electrode of the second transistor (T2) is connected to a second node (S);

[0093] The driving circuit comprises a driving transistor (T3), a gate of the driving transistor (T3) is connected to the first node (G), a first electrode of the driving transistor (T3) is connected to a high-level signal line (ELVDD), a second electrode of the driving transistor (T3) is connected to the second node (S), and the driving transistor (T3) drives the light-emitting diode OLED to emit light;

[0094] The first plate of the storage capacitor (Cst) is connected to the first node (G), and the second plate of the storage capacitor is connected to the second node (S);

[0095] The pixel driving circuits are arranged in rows and columns, and each row of pixel driving circuits corresponds to two rows of gate lines: the first gate line (G1) and the second gate line (G2), as shown in FIG2a. <1> The first gate line of the first row pixel driving circuit, G2 <1> The second gate line of the first row pixel driving circuit; G1 <2> The first gate line of the second row pixel driving circuit, G2 <2> The second gate line of the second row pixel driving circuit; G1 <3> The first gate line of the third row pixel driving circuit, G2 <3> is the second gate line of the third row of pixel driver circuits. Each column of pixel driver circuits corresponds to a column of data lines. In this embodiment, the display device includes white sub-pixels and color sub-pixels, and the color sub-pixels include red sub-pixels, blue sub-pixels, and green sub-pixels. DATA_R provides data signals to the pixel driver circuit of the red sub-pixel, DATA_W provides data signals to the pixel driver circuit of the white sub-pixel, DATA_B provides data signals to the pixel driver circuit of the blue sub-pixel, and DATA_G provides data signals to the pixel driver circuit of the green sub-pixel.

[0096] As shown in FIG. 2 a , multiple columns of sub-pixels may share a compensation control line (SENSE); as shown in FIG. 2 b , multiple columns of sub-pixels may not share a compensation control line (SENSE).

[0097] As shown in FIG3 , the display stage of the display device includes four stages:

[0098] In the first stage, a high potential electric signal is input to the first gate line (G1) and the second gate line (G2), the first transistor (T1) and the second transistor (T2) are turned on, a data voltage is written to the first transistor (T1) through the data line, and a reference voltage (VREF) is written to the second transistor (T2) through the compensation control line (SENSE);

[0099] In the second stage, a low-potential electrical signal is input to the first gate line (G1), a high-potential electrical signal is input to the second gate line (G2), the potential of the electrical signal input to the compensation control line (SENSE) gradually increases, the first transistor (T1) is turned off, the second transistor (T2) is turned on, the driving transistor (T3) is turned on, the second node (S) begins to charge, and at this time the compensation control line (SENSE) is floating;

[0100] In the third stage, a low-potential electrical signal is input to the first gate line (G1), a high-potential electrical signal is input to the second gate line (G2), a high-potential electrical signal is input to the compensation control line (SENSE), the first transistor (T1) is turned off, and the second transistor (T2) is turned on. At this time, a voltage signal of the second node (S) can be obtained and converted into the value of the first parameter;

[0101] In the fourth stage, a high-potential electrical signal is input to the first gate line (G1) and the second gate line (G2), a low-potential electrical signal is input to the compensation control line (SENSE), the first transistor (T1) and the second transistor (T2) are turned on, a data voltage is written to the first transistor (T1) through the data line, and a reference voltage (VREF) is written to the second transistor (T2) through the compensation control line (SENSE).

[0102] In this embodiment, a voltage signal of the second node (S) is obtained and converted into the value of the first parameter. The voltage signal of the second node (S) is proportional to the threshold voltage of the driving transistor (T3) and can represent the duration of the driving transistor (T3) being turned on. By detecting the voltage signal of the second node (S), it can be detected whether the corresponding pixel driving circuit is in a display state for a long time.

[0103] Figure 4 shows a display device in video playback mode. It can be seen that the logo area (where the CCTV13 news is located in the figure) has a high brightness and is displayed for a long time. If the display device is in video playback mode for a long time, the high power consumption causes the logo area to heat up rapidly, resulting in a large temperature difference from other areas, which can cause noticeable afterimages. Of course, afterimages are not limited to the logo area; any area that is in display mode for a long time is more susceptible to afterimages.

[0104] In this embodiment, the display area can be divided into a plurality of sub-areas arranged in an array, and the sub-areas of the display area can be controlled separately. The preset area can include at least one of the sub-areas, i.e., the display area can include one sub-area or multiple sub-areas. The preset area is the area to be detected in this embodiment. The value of at least one first parameter of the preset area is obtained, and whether the preset area is in a long-term display state is determined based on the change in the value of the first parameter. If a pixel driving circuit is in a long-term display state, the threshold voltage of the driving transistor of the pixel driving circuit will increase significantly. First, a first value of the first parameter corresponding to the driving transistor is obtained. After a first preset time period, a second value of the first parameter is obtained. If the second value is greater than the first value and the difference between the second value and the first value is greater than a first preset threshold value, it indicates that the pixel driving circuit is in a long-term display state. The preset area generally includes multiple pixel driving circuits, and accordingly, the preset area includes multiple first parameters. Whether the preset area is in a long-term display state is determined based on the change in the value of at least one first parameter in the preset area. The preset area that is in a long-term display state is determined as a target area, and display control is performed on the target area.

[0105] In this embodiment, in order to perform refined control on the display device, the length of the sub-region does not exceed one quarter of the length of the display region, and the width of the sub-region does not exceed one quarter of the width of the display region.

[0106] Generally, the logo area is located in the four sub-areas at the corners of the display area. Therefore, to reduce the amount of calculation and detection, the preset area can include the four sub-areas at the corners of the display area. Of course, to ensure the effectiveness of eliminating afterimages, the preset area is not limited to including the four sub-areas at the corners of the display area, but can also include all sub-areas of the display area. As shown in Figure 5, the display area is divided into 5*5 sub-areas, and the preset area can include the four sub-areas A, B, C, and D at the corners of the display area.

[0107] In this embodiment, it is possible to determine whether the preset area is the target area based on the value changes of some first parameters in the preset area, or it is possible to determine whether the preset area is the target area based on the value changes of all first parameters in the preset area.

[0108] In some embodiments, the target area satisfies at least one of the following:

[0109] The difference values ​​of all the first parameters in the target area are greater than a first preset threshold value, that is, when the difference values ​​of all the first parameters in the preset area are greater than the first preset threshold value, the preset area is determined to be the target area;

[0110] The difference of some of the first parameters in the target area is greater than a first preset threshold, that is, when the difference of some of the first parameters in the preset area is greater than the first preset threshold, the preset area is determined to be the target area. In this embodiment, a preset ratio can be preset, and when the ratio of the number of first parameters with a difference greater than the first preset threshold to the total number of first parameters in the preset area is greater than the ratio, the preset area is determined to be the target area; or, a specific number can be preset, and when the number of first parameters with a difference greater than the first preset threshold is greater than the specific number, the preset area is determined to be the target area;

[0111] The average value of the difference values ​​of all the first parameters in the target area is greater than a first preset threshold, that is, the average value of the difference values ​​of all the first parameters in the preset area is calculated, and when the average value is greater than the first preset threshold, the preset area is determined to be the target area.

[0112] In a specific example, at a first time point, the first values ​​of the first parameters of all sub-regions of the display area are obtained, and the average of the first values ​​of all the first parameters in the sub-regions is used as the first value of the sub-region. The first value of each sub-region is shown in Figure 6. At a second time point after the first preset time period, the second values ​​of the first parameters of all sub-regions of the display area are obtained, and the average of the second values ​​of all the first parameters in the sub-regions is used as the second value of the sub-region. The second value of each sub-region is shown in Figure 7. It can be seen that the difference between the first value and the second value of the sub-region located in the upper left corner of the display area is 40, and the difference between the first value and the second value of the sub-region located in the upper right corner of the display area is 70, both of which are greater than the first preset threshold of 30. Therefore, the sub-region located in the upper left corner of the display area and the sub-region located in the upper right corner of the display area can be determined as the target area. This embodiment is described with the first preset threshold value of 30. Of course, the value of the first preset threshold is not limited to 30 and can be adjusted to other values ​​as needed.

[0113] In a specific example, the preset area includes four sub-areas located at the corners of the display area. As shown in FIG8 , the display processing method of this embodiment includes the following steps:

[0114] Step 201: Determine whether the display device is in a video playback state;

[0115] Step 202: When the display device is in a video playback state, obtain first values ​​of first parameters of four sub-areas at corner positions of the display area;

[0116] In this embodiment, the first values ​​of the first parameters of all pixel driving circuits in each sub-region may be obtained, and the average value of the first values ​​of the first parameters of all pixel driving circuits may be used as the first value of the first parameter of the sub-region.

[0117] Step 203: After 5 minutes, obtain the second value of the first parameter of the four sub-areas at the corner positions of the display area;

[0118] In this embodiment, the length of the first preset time period may be 5 minutes. Of course, the length of the first preset time period is not limited to 5 minutes, and other values ​​may be adjusted as needed.

[0119] In this embodiment, the second values ​​of the first parameters of all pixel driving circuits in each sub-region may be obtained, and the average value of the second values ​​of the first parameters of all pixel driving circuits may be used as the second value of the first parameter of the sub-region.

[0120] Step 204: Determine whether the difference between the second value and the first value is greater than a first preset threshold;

[0121] For each sub-region, subtract the first value from the second value to obtain a difference between the second value and the first value, and determine whether the difference between the second value and the first value is greater than a first preset threshold. If so, proceed to step 205.

[0122] Step 205: Determine the target area where the difference is greater than a first preset threshold;

[0123] The sub-region where the difference between the second value and the first value is greater than a first preset threshold is determined as the target region. The first preset threshold may be 30. Of course, the first preset threshold is not limited to 30 and may be adjusted to other values ​​as needed.

[0124] Step 206: reducing the brightness of the color sub-pixels in the target area and increasing the brightness of the white sub-pixels in the target area;

[0125] In this embodiment, the brightness of the colored sub-pixels in the target area is reduced, thereby reducing the power consumption and current density of the target area, narrowing the temperature difference between the target area and other areas, and eliminating afterimages. In order to ensure the overall brightness of the target area, while reducing the brightness of the colored sub-pixels in the target area, it is also necessary to increase the brightness of the white sub-pixels in the target area accordingly. After increasing the brightness of the white sub-pixels in the target area accordingly, the overall brightness of the target area remains unchanged, so that the human eye will not clearly perceive the brightness changes in the target area.

[0126] In this embodiment, the brightness of the color sub-pixels in the target area may be reduced to 90%, 80%, 70%, 60%, 50%, 40% or 30% of the initial brightness.

[0127] Step 207: Repeat the step of obtaining the difference;

[0128] Specifically, steps 202-203 can be repeatedly executed to obtain the difference value. For example, in the T1-T2 time period, steps 202-203 are executed to obtain the first difference value, T2 is later than T1, and the time length between T2 and T1 is 5 minutes; in the T2-T3 time period, steps 202-203 are executed to obtain the second difference value, T3 is later than T2, and the time length between T2 and T2 is 5 minutes; in the T3-T4 time period, steps 202-203 are executed to obtain the third difference value, T4 is later than T3, and the time length between T3 and T3 is 5 minutes, and so on, to obtain multiple consecutive difference values.

[0129] Step 208: When the difference is smaller than a second preset threshold value for n consecutive times, the brightness of the color sub-pixels in the target area is restored.

[0130] Specifically, n is an integer greater than 2, and the second preset threshold is less than the first preset threshold. For example, the second preset threshold may be 15. When the difference is less than the second preset threshold for multiple consecutive times, it indicates that the target area is no longer in a long-term display state, and the brightness of the color sub-pixels in the target area can be restored, that is, the brightness of the color sub-pixels in the target area can be restored to the initial brightness. At the same time, the brightness of the white sub-pixels in the target area can also be restored, that is, the brightness of the white sub-pixels in the target area can be restored to the initial brightness.

[0131] In another specific example, the preset area includes all sub-areas of the display area. As shown in FIG9 , the display processing method of this embodiment includes the following steps:

[0132] Step 301: Determine whether the display device is in a video playback state;

[0133] Step 302: When the display device is in a video playback state, obtain first values ​​of first parameters of all sub-areas of the display area;

[0134] In this embodiment, the first values ​​of the first parameters of all pixel driving circuits in each sub-region may be obtained, and the average value of the first values ​​of the first parameters of all pixel driving circuits may be used as the first value of the first parameter of the sub-region.

[0135] Step 303: After 5 minutes, obtain the second value of the first parameter of all sub-areas of the display area;

[0136] In this embodiment, the length of the first preset time period may be 5 minutes. Of course, the length of the first preset time period is not limited to 5 minutes, and other values ​​may be adjusted as needed.

[0137] In this embodiment, the second values ​​of the first parameters of all pixel driving circuits in each sub-region may be obtained, and the average value of the second values ​​of the first parameters of all pixel driving circuits may be used as the second value of the first parameter of the sub-region.

[0138] Step 304: Determine whether the difference between the second value and the first value is greater than a first preset threshold;

[0139] For each sub-region, subtract the first value from the second value to obtain a difference between the second value and the first value, and determine whether the difference between the second value and the first value is greater than a first preset threshold. If so, proceed to step 305.

[0140] Step 305: Determine the target area where the difference is greater than a first preset threshold;

[0141] The sub-region where the difference between the second value and the first value is greater than a first preset threshold is determined as the target region. The first preset threshold may be 30. Of course, the first preset threshold is not limited to 30 and may be adjusted to other values ​​as needed.

[0142] In a specific example, at a first time point, the first values ​​of the first parameters of all sub-areas of the display area are obtained, and the average value of the first values ​​of all the first parameters in the sub-area is used as the first value of the sub-area, and the first value of each sub-area is shown in FIG6 ; at a second time point 5 minutes later, the second values ​​of the first parameters of all sub-areas of the display area are obtained, and the average value of the second values ​​of all the first parameters in the sub-area is used as the second value of the sub-area, and the second value of each sub-area is shown in FIG7 . It can be seen that the difference between the first value and the second value of the sub-area located in the upper left corner of the display area is 40, and the difference between the first value and the second value of the sub-area located in the upper right corner of the display area is 70, both of which are greater than the first preset threshold value of 30. Therefore, the sub-area located in the upper left corner of the display area and the sub-area located in the upper right corner of the display area can be determined as the target area.

[0143] Step 306: reducing the brightness of the color sub-pixels in the target area and increasing the brightness of the white sub-pixels in the target area;

[0144] In this embodiment, the brightness of the colored sub-pixels in the target area is reduced, thereby reducing the power consumption and current density of the target area, narrowing the temperature difference between the target area and other areas, and eliminating afterimages. In order to ensure the overall brightness of the target area, while reducing the brightness of the colored sub-pixels in the target area, it is also necessary to increase the brightness of the white sub-pixels in the target area accordingly. After increasing the brightness of the white sub-pixels in the target area accordingly, the overall brightness of the target area remains unchanged, so that the human eye will not clearly perceive the brightness changes in the target area.

[0145] In this embodiment, the brightness of the color sub-pixels in the target area may be reduced to 90%, 80%, 70%, 60%, 50%, 40% or 30% of the initial brightness.

[0146] Step 307: Repeat the step of obtaining the difference;

[0147] Specifically, steps 302-303 can be repeatedly executed to obtain the difference value. For example, in the T1-T2 time period, steps 302-303 are executed to obtain the first difference value, T2 is later than T1, and the time length between T2 and T1 is 5 minutes; in the T2-T3 time period, steps 302-303 are executed to obtain the second difference value, T3 is later than T2, and the time length between T2 and T2 is 5 minutes; in the T3-T4 time period, steps 302-303 are executed to obtain the third difference value, T4 is later than T3, and the time length between T3 and T3 is 5 minutes, and so on, to obtain multiple consecutive difference values.

[0148] Step 308: When the difference is smaller than a second preset threshold value for n consecutive times, the brightness of the color sub-pixels in the target area is restored.

[0149] Specifically, n is an integer greater than 2, and the second preset threshold is less than the first preset threshold. For example, the second preset threshold may be 15. When the difference is less than the second preset threshold for multiple consecutive times, it indicates that the target area is no longer in a long-term display state, and the brightness of the color sub-pixels in the target area can be restored, that is, the brightness of the color sub-pixels in the target area can be restored to the initial brightness. At the same time, the brightness of the white sub-pixels in the target area can also be restored, that is, the brightness of the white sub-pixels in the target area can be restored to the initial brightness.

[0150] In another specific example, the preset area includes four sub-areas located at the corners of the display area, as shown in FIG10 . The display processing method of this embodiment includes the following steps:

[0151] Step 401: Determine whether the display device is in a video playback state;

[0152] Step 402: When the display device is in a video playback state, obtain first values ​​of first parameters of four sub-areas at corner positions of the display area;

[0153] In this embodiment, the first values ​​of the first parameters of all pixel driving circuits in each sub-region may be obtained, and the average value of the first values ​​of the first parameters of all pixel driving circuits may be used as the first value of the first parameter of the sub-region.

[0154] Step 403: After 5 minutes, obtain the second value of the first parameter of the four sub-areas at the corner positions of the display area;

[0155] In this embodiment, the length of the first preset time period may be 5 minutes. Of course, the length of the first preset time period is not limited to 5 minutes, and other values ​​may be adjusted as needed.

[0156] In this embodiment, the second values ​​of the first parameters of all pixel driving circuits in each sub-region may be obtained, and the average value of the second values ​​of the first parameters of all pixel driving circuits may be used as the second value of the first parameter of the sub-region.

[0157] Step 404: Determine whether the difference between the second value and the first value is greater than a first preset threshold;

[0158] For each sub-region, subtract the first value from the second value to obtain a difference between the second value and the first value, and determine whether the difference between the second value and the first value is greater than a first preset threshold. If so, proceed to step 405.

[0159] Step 405: Determine the target area where the difference is greater than a first preset threshold;

[0160] The sub-region where the difference between the second value and the first value is greater than a first preset threshold is determined as the target region. The first preset threshold may be 30. Of course, the first preset threshold is not limited to 30 and may be adjusted to other values ​​as needed.

[0161] Step 406: reducing the brightness of the color sub-pixels in the target area and increasing the brightness of the white sub-pixels in the target area;

[0162] In this embodiment, the brightness of the colored sub-pixels in the target area is reduced, thereby reducing the power consumption and current density of the target area, narrowing the temperature difference between the target area and other areas, and eliminating afterimages. In order to ensure the overall brightness of the target area, while reducing the brightness of the colored sub-pixels in the target area, it is also necessary to increase the brightness of the white sub-pixels in the target area accordingly. After increasing the brightness of the white sub-pixels in the target area accordingly, the overall brightness of the target area remains unchanged, so that the human eye will not clearly perceive the brightness changes in the target area.

[0163] In this embodiment, the brightness of the color sub-pixels in the target area may be reduced to 90%, 80%, 70%, 60%, 50%, 40% or 30% of the initial brightness.

[0164] Step 407: After 5 minutes, reduce the brightness of the color sub-pixels and / or white sub-pixels in the target area;

[0165] In this embodiment, the overall brightness of the target area can be reduced to further reduce the afterimage. The brightness of only the color sub-pixels in the target area can be reduced, or the brightness of only the white sub-pixels in the target area can be reduced, or the brightness of both the color sub-pixels and the white sub-pixels in the target area can be reduced simultaneously.

[0166] Step 408: Repeat the step of obtaining the difference;

[0167] Specifically, steps 402-403 can be repeatedly executed to obtain the difference value. For example, in the T1-T2 time period, steps 402-403 are executed to obtain the first difference value, T2 is later than T1, and the time length between T2 and T1 is 5 minutes; in the T2-T3 time period, steps 402-403 are executed to obtain the second difference value, T3 is later than T2, and the time length between T2 and T2 is 5 minutes; in the T3-T4 time period, steps 402-403 are executed to obtain the third difference value, T4 is later than T3, and the time length between T3 and T3 is 5 minutes, and so on, to obtain multiple consecutive difference values.

[0168] Step 409: When the difference is smaller than a second preset threshold value for n consecutive times, the brightness of the color sub-pixels in the target area is restored.

[0169] Specifically, n is an integer greater than 2, and the second preset threshold is less than the first preset threshold. For example, the second preset threshold may be 15. When the difference is less than the second preset threshold for multiple consecutive times, it indicates that the target area is no longer in a long-term display state, and the brightness of the color sub-pixels in the target area can be restored, that is, the brightness of the color sub-pixels in the target area can be restored to the initial brightness. At the same time, the brightness of the white sub-pixels in the target area can also be restored, that is, the brightness of the white sub-pixels in the target area can be restored to the initial brightness.

[0170] In another specific example, the preset area includes four sub-areas located at the corners of the display area, as shown in FIG11 . The display processing method of this embodiment includes the following steps:

[0171] Step 501: Determine whether the display device is in a video playback state;

[0172] Step 502: When the display device is in a video playback state, obtain first values ​​of first parameters of four sub-areas at corner positions of the display area;

[0173] In this embodiment, the first values ​​of the first parameters of all pixel driving circuits in each sub-region may be obtained, and the average value of the first values ​​of the first parameters of all pixel driving circuits may be used as the first value of the first parameter of the sub-region.

[0174] Step 503: After 5 minutes, obtain the second value of the first parameter of the four sub-areas at the corner positions of the display area;

[0175] In this embodiment, the length of the first preset time period may be 5 minutes. Of course, the length of the first preset time period is not limited to 5 minutes, and other values ​​may be adjusted as needed.

[0176] In this embodiment, the second values ​​of the first parameters of all pixel driving circuits in each sub-region may be obtained, and the average value of the second values ​​of the first parameters of all pixel driving circuits may be used as the second value of the first parameter of the sub-region.

[0177] Step 504: Determine whether the difference between the second value and the first value is greater than a first preset threshold;

[0178] For each sub-region, subtract the first value from the second value to obtain a difference between the second value and the first value, and determine whether the difference between the second value and the first value is greater than a first preset threshold. If so, proceed to step 505.

[0179] Step 505: Determine the target area where the difference is greater than a first preset threshold;

[0180] The sub-region where the difference between the second value and the first value is greater than a first preset threshold is determined as the target region. The first preset threshold may be 30. Of course, the first preset threshold is not limited to 30 and may be adjusted to other values ​​as needed.

[0181] Step 506: reducing the brightness of the color sub-pixels in the target area and increasing the brightness of the white sub-pixels in the target area;

[0182] In this embodiment, the brightness of the colored sub-pixels in the target area is reduced, thereby reducing the power consumption and current density of the target area, narrowing the temperature difference between the target area and other areas, and eliminating afterimages. In order to ensure the overall brightness of the target area, while reducing the brightness of the colored sub-pixels in the target area, it is also necessary to increase the brightness of the white sub-pixels in the target area accordingly. After increasing the brightness of the white sub-pixels in the target area accordingly, the overall brightness of the target area remains unchanged, so that the human eye will not clearly perceive the brightness changes in the target area.

[0183] In this embodiment, the brightness of the color sub-pixels in the target area may be reduced to 90%, 80%, 70%, 60%, 50%, 40% or 30% of the initial brightness.

[0184] Step 507: After 5 minutes, reduce the brightness of the color sub-pixels and / or white sub-pixels in the target area;

[0185] In this embodiment, the overall brightness of the target area can be reduced to further reduce the afterimage. The brightness of only the color sub-pixels in the target area can be reduced, or the brightness of only the white sub-pixels in the target area can be reduced, or the brightness of both the color sub-pixels and the white sub-pixels in the target area can be reduced simultaneously.

[0186] Step 508: After 10 minutes, increase the brightness of the color sub-pixels and / or white sub-pixels in the target area;

[0187] In this embodiment, the brightness of only the color sub-pixels in the target area may be increased, the brightness of only the white sub-pixels in the target area may be increased, or the brightness of both the color sub-pixels and the white sub-pixels in the target area may be increased.

[0188] Through steps 507 - 508 , the brightness and color of the target area are changed in a cyclic manner, which can help reduce the afterimage of the target area.

[0189] Step 509: Repeat the step of obtaining the difference;

[0190] Specifically, while looping through steps 507-508, steps 502-503 can be repeatedly executed to obtain the difference. For example, in the T1-T2 time period, steps 502-503 are executed to obtain the first difference, where T2 is later than T1 and the time between T2 and T1 is 5 minutes; in the T2-T3 time period, steps 502-503 are executed to obtain the second difference, where T3 is later than T2 and the time between T2 and T2 is 5 minutes; in the T3-T4 time period, steps 502-503 are executed to obtain the third difference, where T4 is later than T3 and the time between T3 and T3 is 5 minutes, and so on, to obtain multiple consecutive difference values.

[0191] Steps 507 and 508 are executed in a loop, i.e., during the time period T1-T2, step 507 is executed; during the time period T2-T3, step 508 is executed; during the time period T3-T4, step 507 is executed; during the time period T4-T5, step 508 is executed, and so on. T5 is later than T4, and the time difference between T5 and T4 is 5 minutes.

[0192] Step 510: When the difference is smaller than a second preset threshold value for n consecutive times, the brightness of the color sub-pixels in the target area is restored.

[0193] Specifically, n is an integer greater than 2, and the second preset threshold is less than the first preset threshold. For example, the second preset threshold may be 15. When the difference is less than the second preset threshold for multiple consecutive times, it indicates that the target area is no longer in a long-term display state, and the brightness of the color sub-pixels in the target area can be restored, that is, the brightness of the color sub-pixels in the target area can be restored to the initial brightness. At the same time, the brightness of the white sub-pixels in the target area can also be restored, that is, the brightness of the white sub-pixels in the target area can be restored to the initial brightness.

[0194] The present disclosure also provides a display processing device for use in a display device, wherein a display area of ​​the display device includes color sub-pixels and white sub-pixels. As shown in FIG12 , the device includes:

[0195] an acquisition module 61 configured to, when the display device is in a video playback state, acquire a first value of at least one first parameter of a preset area of ​​the display area, the first parameter corresponding to a driving transistor of a pixel driving circuit in the preset area, the value of the first parameter being proportional to a threshold voltage of the corresponding driving transistor; and acquire a second value of each first parameter after a first preset time period;

[0196] a determination module 62, configured to determine a target area according to a difference between the second value and the first value, wherein the difference of at least part of the first parameter of the target area is greater than a first preset threshold;

[0197] The processing module 63 is configured to reduce the brightness of the color sub-pixels in the target area.

[0198] In this embodiment, when the target area is in the display state for a long time, the value of the first parameter of the target area will change significantly. By detecting the value of the first parameter, it is possible to detect whether the target area is in the display state for a long time. If the target area is in the display state for a long time, the temperature difference between the target area and other areas will be relatively large, and afterimages are likely to appear. Therefore, the brightness of the color sub-pixels in the target area can be reduced, thereby reducing the power consumption and current density of the target area, narrowing the temperature difference between the target area and other areas, and eliminating afterimages.

[0199] In some embodiments, the processing module 63 is further configured to simultaneously reduce the brightness of the color sub-pixels in the target area and simultaneously increase the brightness of the white sub-pixels in the target area. To ensure the overall brightness of the target area, while reducing the brightness of the color sub-pixels in the target area, it is also necessary to correspondingly increase the brightness of the white sub-pixels in the target area so that the human eye does not clearly perceive the brightness change in the target area.

[0200] In this embodiment, as shown in FIG2a and FIG2b, the pixel driving circuit includes a data writing circuit, a driving circuit, an external control compensation circuit and a storage capacitor, the data writing circuit includes a first transistor (T1), a gate of the first transistor (T1) is connected to a first gate line (G1), a first electrode of the first transistor (T1) is connected to a data line (DATA), and a second electrode of the first transistor (T1) is connected to a first node (G);

[0201] The external compensation control circuit comprises a second transistor (T2), a gate of the second transistor (T2) is connected to a second gate line (G2), a first electrode of the second transistor (T2) is connected to a compensation control line (SENSE), and a second electrode of the second transistor (T2) is connected to a second node (S);

[0202] The driving circuit comprises a driving transistor (T3), a gate of the driving transistor (T3) is connected to the first node (G), a first electrode of the driving transistor (T3) is connected to a high-level signal line (ELVDD), a second electrode of the driving transistor (T3) is connected to the second node (S), and the driving transistor (T3) drives the light-emitting diode OLED to emit light;

[0203] The first plate of the storage capacitor (Cst) is connected to the first node (G), and the second plate of the storage capacitor is connected to the second node (S);

[0204] The pixel driving circuits are arranged in rows and columns, and each row of pixel driving circuits corresponds to two rows of gate lines: the first gate line (G1) and the second gate line (G2), as shown in FIG2a. <1> The first gate line of the first row pixel driving circuit, G2 <1> The second gate line of the first row pixel driving circuit; G1 <2> The first gate line of the second row pixel driving circuit, G2 <2> The second gate line of the second row pixel driving circuit; G1 <3> The first gate line of the third row pixel driving circuit, G2 <3> is the second gate line of the third row of pixel driver circuits. Each column of pixel driver circuits corresponds to a column of data lines. In this embodiment, the display device includes white sub-pixels and color sub-pixels, and the color sub-pixels include red sub-pixels, blue sub-pixels, and green sub-pixels. DATA_R provides data signals to the pixel driver circuit of the red sub-pixel, DATA_W provides data signals to the pixel driver circuit of the white sub-pixel, DATA_B provides data signals to the pixel driver circuit of the blue sub-pixel, and DATA_G provides data signals to the pixel driver circuit of the green sub-pixel.

[0205] As shown in FIG. 2 a , multiple columns of sub-pixels may share a compensation control line (SENSE); as shown in FIG. 2 b , multiple columns of sub-pixels may not share a compensation control line (SENSE).

[0206] As shown in FIG3 , the display stage of the display device includes four stages:

[0207] In the first stage, a high potential electric signal is input to the first gate line (G1) and the second gate line (G2), the first transistor (T1) and the second transistor (T2) are turned on, a data voltage is written to the first transistor (T1) through the data line, and a reference voltage (VREF) is written to the second transistor (T2) through the compensation control line (SENSE);

[0208] In the second stage, a low-potential electrical signal is input to the first gate line (G1), a high-potential electrical signal is input to the second gate line (G2), the potential of the electrical signal input to the compensation control line (SENSE) gradually increases, the first transistor (T1) is turned off, the second transistor (T2) is turned on, the driving transistor (T3) is turned on, the second node (S) begins to charge, and at this time the compensation control line (SENSE) is floating;

[0209] In the third stage, a low-potential electrical signal is input to the first gate line (G1), a high-potential electrical signal is input to the second gate line (G2), a high-potential electrical signal is input to the compensation control line (SENSE), the first transistor (T1) is turned off, and the second transistor (T2) is turned on. At this time, a voltage signal of the second node (S) can be obtained and converted into the value of the first parameter;

[0210] In the fourth stage, a high-potential electrical signal is input to the first gate line (G1) and the second gate line (G2), a low-potential electrical signal is input to the compensation control line (SENSE), the first transistor (T1) and the second transistor (T2) are turned on, a data voltage is written to the first transistor (T1) through the data line, and a reference voltage (VREF) is written to the second transistor (T2) through the compensation control line (SENSE).

[0211] In this embodiment, the acquisition module 61 is specifically configured to acquire the voltage signal of the second node in the third stage and convert the voltage signal into the value of the first parameter. The voltage signal of the second node (S) is proportional to the threshold voltage of the driving transistor (T3) and can represent the duration of the driving transistor (T3) being on. By detecting the voltage signal of the second node (S), it is possible to detect whether the corresponding pixel driving circuit is in a display state for a long time.

[0212] Figure 4 shows a schematic diagram of a display device in video playback mode. It can be seen that the logo area (where the CCTV13 news is located in the figure) has a high brightness and is in the display mode for a long time. If the display device is in video playback mode for a long time, the high power consumption causes the logo area to heat up rapidly, resulting in a large temperature difference from other areas, which can cause obvious afterimages. Of course, afterimages are not limited to the logo area; any area that is in the display mode for a long time is more susceptible to afterimages.

[0213] In this embodiment, the display area can be divided into a plurality of sub-areas arranged in an array, and the sub-areas of the display area can be controlled separately. The preset area can include at least one of the sub-areas, i.e., the display area can include one sub-area or multiple sub-areas. The preset area is the area to be detected in this embodiment. The value of at least one first parameter of the preset area is obtained, and whether the preset area is in a long-term display state is determined based on changes in the value of the first parameter. If a pixel driving circuit is in a long-term display state, the threshold voltage of the driving transistor of the pixel driving circuit will increase. First, a first value of the first parameter corresponding to the driving transistor is obtained. After a first preset time period, a second value of the first parameter is obtained. If the second value is greater than the first value and the difference between the second value and the first value is greater than a first preset threshold, it indicates that the pixel driving circuit is in a long-term display state. The preset area generally includes multiple pixel driving circuits, and accordingly, the preset area includes multiple first parameters. Whether the preset area is in a long-term display state is determined based on changes in the value of at least one first parameter in the preset area. The preset area that is in a long-term display state is determined as a target area, and display control is performed on the target area.

[0214] In this embodiment, in order to perform refined control on the display device, the length of the sub-region does not exceed one quarter of the length of the display region, and the width of the sub-region does not exceed one quarter of the width of the display region.

[0215] Generally, the logo area is located in the four sub-areas at the corners of the display area. Therefore, to reduce the amount of calculation and detection, the preset area can include the four sub-areas at the corners of the display area. Of course, to ensure the effectiveness of eliminating afterimages, the preset area is not limited to including the four sub-areas at the corners of the display area, but can also include all sub-areas of the display area. As shown in Figure 5, the display area is divided into 5*5 sub-areas, and the preset area can include the four sub-areas A, B, C, and D at the corners of the display area.

[0216] In this embodiment, it is possible to determine whether the preset area is the target area based on the value changes of some first parameters in the preset area, or it is possible to determine whether the preset area is the target area based on the value changes of all first parameters in the preset area.

[0217] In some embodiments, the target area satisfies at least one of the following:

[0218] The difference values ​​of all the first parameters in the target area are greater than a first preset threshold value, that is, when the difference values ​​of all the first parameters in the preset area are greater than the first preset threshold value, the preset area is determined to be the target area;

[0219] The difference of some of the first parameters in the target area is greater than a first preset threshold, that is, when the difference of some of the first parameters in the preset area is greater than the first preset threshold, the preset area is determined to be the target area. In this embodiment, a preset ratio can be preset, and when the ratio of the number of first parameters with a difference greater than the first preset threshold to the total number of first parameters in the preset area is greater than the ratio, the preset area is determined to be the target area; or, a specific number can be preset, and when the number of first parameters with a difference greater than the first preset threshold is greater than the specific number, the preset area is determined to be the target area;

[0220] The average value of the difference values ​​of all the first parameters in the target area is greater than a first preset threshold, that is, the average value of the difference values ​​of all the first parameters in the preset area is calculated, and when the average value is greater than the first preset threshold, the preset area is determined to be the target area.

[0221] In a specific example, at a first time point, the first values ​​of the first parameters of all sub-regions of the display area are obtained, and the average of the first values ​​of all the first parameters in the sub-regions is used as the first value of the sub-region. The first value of each sub-region is shown in Figure 6. At a second time point after the first preset time period, the second values ​​of the first parameters of all sub-regions of the display area are obtained, and the average of the second values ​​of all the first parameters in the sub-regions is used as the second value of the sub-region. The second value of each sub-region is shown in Figure 7. It can be seen that the difference between the first value and the second value of the sub-region located in the upper left corner of the display area is 40, and the difference between the first value and the second value of the sub-region located in the upper right corner of the display area is 70, both of which are greater than the first preset threshold of 30. Therefore, the sub-region located in the upper left corner of the display area and the sub-region located in the upper right corner of the display area can be determined as the target area. This embodiment is described with the first preset threshold value of 30. Of course, the value of the first preset threshold is not limited to 30 and can be adjusted to other values ​​as needed.

[0222] In some embodiments, the processing module 63 is further used to repeat the step of obtaining the difference after reducing the brightness of the colored sub-pixels of the target area, and restore the brightness of the colored sub-pixels of the target area when the difference is less than a second preset threshold for n consecutive times, where n is an integer greater than 2, and the second preset threshold is less than the first preset threshold.

[0223] In some embodiments, the processing module 63 is further used to reduce the brightness of the colored sub-pixels of the target area and increase the brightness of the white sub-pixels of the target area after a second preset time period, and repeat the step of obtaining the difference. When the difference is less than a second preset threshold value for n consecutive times, the brightness of the colored sub-pixels and / or white sub-pixels of the target area is restored, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

[0224] In some embodiments, the processing module 63 is also used to, after reducing the brightness of the colored sub-pixels of the target area and increasing the brightness of the white sub-pixels of the target area, cyclically execute the steps of reducing and increasing the brightness of the colored sub-pixels and / or white sub-pixels of the target area after a second preset time period, and repeat the step of obtaining the difference, and restore the brightness of the colored sub-pixels and / or white sub-pixels of the target area when the difference is less than a second preset threshold value for n consecutive times, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

[0225] An embodiment of the present disclosure further provides a display device, comprising the display processing apparatus as described above.

[0226] The display device includes, but is not limited to, components such as a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply. Those skilled in the art will appreciate that the structure of the above-mentioned display device does not constitute a limitation on the display device, and the display device may include more or fewer of the above-mentioned components, or a combination of certain components, or a different arrangement of components. In the embodiments of the present disclosure, the display device includes, but is not limited to, a monitor, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.

[0227] The display device may be any product or component with a display function, such as a television, a monitor, a digital photo frame, a mobile phone, or a tablet computer, wherein the display device further includes a flexible circuit board, a printed circuit board, and a backplane.

[0228] In the various method embodiments of the present disclosure, the serial numbers of the steps cannot be used to limit the order of the steps. For ordinary technicians in this field, without paying any creative work, changes to the order of the steps are also within the scope of protection of the present disclosure.

[0229] It should be noted that the various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences from other embodiments. In particular, since the embodiments are generally similar to the product embodiments, the description is relatively simple. For relevant parts, refer to the partial description of the product embodiments.

[0230] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0231] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0232] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0233] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display processing device, characterized in that: Applied to a display device, wherein a display area of ​​the display device includes color sub-pixels and white sub-pixels, the device comprises: an acquisition module, configured to acquire, when the display device is in a video playback state, a first value of at least one first parameter of a preset area of ​​the display area, wherein the first parameter corresponds to a driving transistor of a pixel driving circuit of the preset area, and the value of the first parameter is proportional to a threshold voltage of the corresponding driving transistor; and acquire a second value of each of the first parameters after a first preset time period; a determination module, configured to determine a target area according to a difference between the second value and the first value, wherein the difference of at least part of the first parameters of the target area is greater than a first preset threshold; The processing module is used to reduce the brightness of the color sub-pixels in the target area.

2. The display processing device according to claim 1, characterized in that: The processing module is further configured to increase the brightness of the white sub-pixel in the target area while reducing the brightness of the color sub-pixel in the target area.

3. The display processing device according to claim 1, characterized in that: The target area meets at least one of the following conditions: The difference values ​​of all first parameters in the target area are greater than a first preset threshold; The difference of some first parameters in the target area is greater than a first preset threshold; An average value of the difference values ​​of all first parameters in the target area is greater than a first preset threshold.

4. The display processing device according to any one of claims 1 to 3, characterized in that: The pixel driving circuit includes a data writing circuit, a driving circuit, an external control compensation circuit and a storage capacitor, the data writing circuit includes a first transistor, a gate of the first transistor is connected to a first gate line, a first electrode of the first transistor is connected to a data line, and a second electrode of the first transistor is connected to a first node; The external compensation control circuit includes a second transistor, a gate of the second transistor is connected to a second gate line, a first electrode of the second transistor is connected to a compensation control line, and a The second pole is connected to the second node; The driving circuit comprises a driving transistor, a gate of the driving transistor is connected to the first node, a first electrode of the driving transistor is connected to a high level signal line, and a second electrode of the driving transistor is connected to the second node; The first plate of the storage capacitor is connected to the first node, and the second plate of the storage capacitor is connected to the second node; The display stage of the display device includes four stages: In the first stage, a high potential electrical signal is input to the first gate line and the second gate line; In the second stage, a low potential electric signal is input to the first gate line, a high potential electric signal is input to the second gate line, and the potential of the electric signal input to the compensation control line is gradually increased; In the third stage, a low potential electrical signal is input to the first gate line, a high potential electrical signal is input to the second gate line, and a high potential electrical signal is input to the compensation control line; In the fourth stage, a high potential electrical signal is input to the first gate line and the second gate line, and a low potential electrical signal is input to the compensation control line; The acquisition module is specifically used to acquire the voltage signal of the second node in the third stage, and convert the voltage signal into the value of the first parameter.

5. The display processing device according to claim 1, characterized in that: The display area is divided into a plurality of sub-areas arranged in an array, and the preset area includes at least one of the sub-areas.

6. The display processing device according to claim 5, characterized in that: The preset area includes four sub-areas located at the corners of the display area.

7. The display processing device according to claim 1 or 2, characterized in that: The processing module is also used to repeat the step of obtaining the difference after reducing the brightness of the colored sub-pixels of the target area, and restore the brightness of the colored sub-pixels of the target area when the difference is less than a second preset threshold value for n consecutive times, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

8. The display processing device according to claim 2, characterized in that: The processing module is also used to reduce the brightness of the color sub-pixels in the target area and increase the brightness of the white sub-pixels in the target area, and then reduce the brightness of the target area after a second preset time period. The brightness of the colored sub-pixels and / or white sub-pixels in the target area is restored, and the step of obtaining the difference is repeated. When the difference is less than a second preset threshold value for n consecutive times, the brightness of the colored sub-pixels and / or white sub-pixels in the target area is restored, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

9. The display processing device according to claim 2, characterized in that: The processing module is also used to, after reducing the brightness of the colored sub-pixels of the target area and increasing the brightness of the white sub-pixels of the target area, cyclically execute the steps of reducing and increasing the brightness of the colored sub-pixels and / or white sub-pixels of the target area after a second preset time period, and repeat the step of obtaining the difference, and restore the brightness of the colored sub-pixels and / or white sub-pixels of the target area when the difference is less than a second preset threshold value for n consecutive times, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

10. A display device, characterized in that: The device comprises a display processing device as claimed in any one of claims 1 to 9.

11. A display processing method, characterized in that: Applied to a display device, wherein a display area of ​​the display device includes color sub-pixels and white sub-pixels, the method includes: When the display device is in a video playback state, obtaining a first value of at least one first parameter of a preset area of ​​the display area, wherein the first parameter corresponds to a driving transistor of a pixel driving circuit of the preset area, and the value of the first parameter is proportional to a threshold voltage of the corresponding driving transistor; After a first preset time period, obtaining a second value of each of the first parameters; Determine a target area according to a difference between the second value and the first value, wherein the difference of at least part of the first parameters of the target area is greater than a first preset threshold; The brightness of the color sub-pixels in the target area is reduced.

12. The display processing method according to claim 11, characterized in that: While reducing the brightness of the color sub-pixels in the target area, the method further includes: The brightness of the white sub-pixels in the target area is increased.

13. The display processing method according to claim 11, characterized in that: The target area meets at least one of the following conditions: The difference values ​​of all first parameters in the target area are greater than a first preset threshold; The difference of some first parameters in the target area is greater than a first preset threshold; An average value of the difference values ​​of all first parameters in the target area is greater than a first preset threshold.

14. The display processing method according to any one of claims 11 to 13, characterized in that: The pixel driving circuit includes a data writing circuit, a driving circuit, an external control compensation circuit and a storage capacitor, the data writing circuit includes a first transistor, a gate of the first transistor is connected to a first gate line, a first electrode of the first transistor is connected to a data line, and a second electrode of the first transistor is connected to a first node; The external compensation control circuit comprises a second transistor, a gate of the second transistor is connected to a second gate line, a first electrode of the second transistor is connected to a compensation control line, and a second electrode of the second transistor is connected to a second node; The driving circuit comprises a driving transistor, a gate of the driving transistor is connected to the first node, a first electrode of the driving transistor is connected to a high level signal line, and a second electrode of the driving transistor is connected to the second node; The first plate of the storage capacitor is connected to the first node, and the second plate of the storage capacitor is connected to the second node; The display stage of the display device includes four stages: In the first stage, a high potential electrical signal is input to the first gate line and the second gate line; In the second stage, a low potential electric signal is input to the first gate line, a high potential electric signal is input to the second gate line, and the potential of the electric signal input to the compensation control line is gradually increased; In the third stage, a low potential electrical signal is input to the first gate line, a high potential electrical signal is input to the second gate line, and a high potential electrical signal is input to the compensation control line; In the fourth stage, a high potential electrical signal is input to the first gate line and the second gate line, and a low potential electrical signal is input to the compensation control line; Wherein, obtaining the value of at least one first parameter of the preset area of ​​the display area includes: In the third stage, a voltage signal of the second node is acquired, and the voltage signal is converted into a value of the first parameter.

15. The display processing method according to claim 11, characterized in that: The display area is divided into a plurality of sub-areas arranged in an array, and the preset area includes at least one of the sub-areas.

16. The display processing method according to claim 15, characterized in that: The preset area includes four sub-areas located at the corners of the display area.

17. The display processing method according to claim 15, characterized in that: The length of the sub-region does not exceed one quarter of the length of the display region, and the width of the sub-region does not exceed one quarter of the width of the display region.

18. The display processing method according to claim 11 or 12, characterized in that: After reducing the brightness of the color sub-pixels in the target area, the method further includes: Repeat the step of obtaining the difference, and when the difference is less than a second preset threshold value for n consecutive times, restore the brightness of the color sub-pixel of the target area, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

19. The display processing method according to claim 12, characterized in that: After reducing the brightness of the color sub-pixels in the target area and increasing the brightness of the white sub-pixels in the target area, the method further includes: After a second preset time period, the brightness of the colored sub-pixels and / or white sub-pixels of the target area is reduced, and the step of obtaining the difference is repeated; when the difference is less than a second preset threshold value for n consecutive times, the brightness of the colored sub-pixels and / or white sub-pixels of the target area is restored, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

20. The display processing method according to claim 12, characterized in that: After reducing the brightness of the color sub-pixels in the target area and increasing the brightness of the white sub-pixels in the target area, the method further includes: After a second preset time period, the steps of reducing and increasing the brightness of the colored sub-pixels and / or white sub-pixels of the target area are cyclically executed, and the step of obtaining the difference is repeated; when the difference is less than a second preset threshold value for n consecutive times, the brightness of the colored sub-pixels and / or white sub-pixels of the target area is restored, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

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