Display processing method, apparatus and display device

Abstract

This disclosure provides a display processing method, apparatus, and display device, belonging to the field of display technology. The display processing apparatus is applied to a display device, the display area of ​​which includes color sub-pixels and white sub-pixels. The apparatus includes: an acquisition module, configured to, when the display device is in video playback mode, 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 of the preset area, the value of the first parameter being proportional to the threshold voltage of the corresponding driving transistor; after a first preset time period, acquire a second value of each first parameter; a determination module, configured to determine a target area based on the difference between the second value and the first value, wherein at least a portion of the first parameters of the target area have a difference greater than a first preset threshold; and a processing module, configured to reduce the brightness of the color sub-pixels of the target area. The technical solution of this disclosure can eliminate image retention in display devices.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display processing method, apparatus and display device. Background Technology

[0002] OLED (Organic Light-Emitting Diode) display devices have been listed as a promising next-generation display technology due to their advantages such as being thin, light, having a wide viewing angle, being actively emitting light, having continuously adjustable emission colors, having low cost, fast response speed, low energy consumption, low driving voltage, wide operating temperature range, simple manufacturing process, high luminous efficiency, and being flexible in display.

[0003] In related technologies, OLED display devices include color subpixels and white subpixels. Color subpixels are achieved by setting a color filter layer on the light-emitting side of the white subpixels. Compared with white subpixels, color subpixels have a greater brightness loss. In order to achieve the preset brightness, color subpixels consume more power. In some constantly lit areas, such as the logo area, the high power consumption of color subpixels causes the temperature in this area to rise rapidly, resulting in a large temperature difference with other areas and causing obvious image retention. Summary of the Invention

[0004] The technical problem to be solved by this disclosure is to provide a display processing method, apparatus and display device that can eliminate image retention in a display device.

[0005] To address the aforementioned technical problems, the embodiments of this disclosure provide the following technical solutions:

[0006] On one hand, a display processing apparatus is provided for use in a display device, wherein the display area of ​​the display device includes color sub-pixels and white sub-pixels, the apparatus comprising:

[0007] The acquisition module is 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, 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 the threshold voltage of the corresponding driving transistor; and acquire a second value of each of the first parameters after a first preset time period.

[0008] A determining module is used to determine a target region based on the difference between the second value and the first value, wherein at least a portion of the first parameter of the target region has a difference greater than a first preset threshold.

[0009] The processing module is used to reduce the brightness of the colored sub-pixels in the target area.

[0010] In some embodiments, the processing module is further configured to increase the brightness of the white sub-pixels in the target region while reducing the brightness of the colored sub-pixels in the target region.

[0011] In some embodiments, the target region satisfies at least one of the following:

[0012] The difference between all first parameters within the target area is greater than a first preset threshold.

[0013] The difference between some of the first parameters within the target area is greater than a first preset threshold;

[0014] The average value of the differences of all first parameters within the target area is greater than a first preset threshold.

[0015] 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, the gate of the first transistor is connected to a first gate line, the first electrode of the first transistor is connected to a data line, and the second electrode of the first transistor is connected to a first node.

[0016] The external compensation control circuit includes a second transistor, the gate of the second transistor is connected to a second gate line, the first terminal of the second transistor is connected to a compensation control line, and the second terminal of the second transistor is connected to a second node;

[0017] The driving circuit includes a driving transistor, the gate of which is connected to the first node, the first terminal of which is connected to a high-level signal line, and the second terminal of which is connected to the second node.

[0018] 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;

[0019] The display phase of the display device includes four stages:

[0020] In the first stage, a high-potential electrical signal is input to the first gate line and the second gate line;

[0021] In the second 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 the potential of the electrical signal input to the compensation control line gradually increases.

[0022] 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;

[0023] 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;

[0024] Specifically, the acquisition module is 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.

[0025] In some embodiments, the display area is divided into multiple sub-regions arranged in an array, and the preset area includes at least one of the sub-regions.

[0026] In some embodiments, the preset area includes four sub-areas located at the corners of the display area.

[0027] In some embodiments, the processing module is further configured to repeat the step of obtaining the difference after reducing the brightness of the color sub-pixels of the target area, and restore the brightness of the color sub-pixels of the target area when the difference is less than a second preset threshold n times consecutively, where n is an integer greater than 2 and the second preset threshold is less than the first preset threshold.

[0028] In some embodiments, the processing module is further configured 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, after a second preset time period, reduce the brightness of the colored sub-pixels and / or the white sub-pixels of the target area and repeat the step of obtaining the difference value, and when the difference value is less than a second preset threshold n times consecutively, restore the brightness of the colored sub-pixels and / or the white sub-pixels of the target area, where n is an integer greater than 2, and the second preset threshold is less than the first preset threshold.

[0029] In some embodiments, the processing module is further configured 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, after a second preset time period, repeatedly execute the steps of reducing and increasing the brightness of the colored sub-pixels and / or white sub-pixels of the target area, and repeatedly obtain the difference value, and restore the brightness of the colored sub-pixels and / or white sub-pixels of the target area when the difference value is less than a second preset threshold n times consecutively, where n is an integer greater than 2, and the second preset threshold is less than the first preset threshold.

[0030] This disclosure also provides a display device, including the display processing apparatus described above.

[0031] This disclosure also provides a display processing method applied to a display device, wherein the display area of ​​the display device includes color sub-pixels and white sub-pixels, the method comprising:

[0032] When the display device is in video playback mode, a first value of at least one first parameter of a preset area of ​​the display area is obtained. The first parameter corresponds to the driving transistor of the pixel driving circuit of the preset area, and the value of the first parameter is proportional to the threshold voltage of the corresponding driving transistor.

[0033] After a first preset time period, obtain the second value of each of the first parameters;

[0034] A target region is determined based on the difference between the second value and the first value, wherein at least a portion of the first parameter of the target region has a difference greater than a first preset threshold.

[0035] Reduce the brightness of the colored sub-pixels in the target area.

[0036] In some embodiments, while reducing the brightness of the colored sub-pixels in the target region, the method further includes:

[0037] Increase the brightness of the white sub-pixels in the target area.

[0038] In some embodiments, the target region satisfies at least one of the following:

[0039] The difference between all first parameters within the target area is greater than a first preset threshold.

[0040] The difference between some of the first parameters within the target area is greater than a first preset threshold;

[0041] The average value of the differences of all first parameters within the target area is greater than a first preset threshold.

[0042] 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, the gate of the first transistor is connected to a first gate line, the first electrode of the first transistor is connected to a data line, and the second electrode of the first transistor is connected to a first node.

[0043] The external compensation control circuit includes a second transistor, the gate of the second transistor is connected to a second gate line, the first terminal of the second transistor is connected to a compensation control line, and the second terminal of the second transistor is connected to a second node;

[0044] The driving circuit includes a driving transistor, the gate of which is connected to the first node, the first terminal of which is connected to a high-level signal line, and the second terminal of which is connected to the second node.

[0045] 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;

[0046] The display phase of the display device includes four stages:

[0047] In the first stage, a high-potential electrical signal is input to the first gate line and the second gate line;

[0048] In the second 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 the potential of the electrical signal input to the compensation control line gradually increases.

[0049] 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;

[0050] 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;

[0051] The value of at least one first parameter for obtaining the preset area of ​​the display area includes:

[0052] In the third stage, the voltage signal of the second node is acquired, and the voltage signal is converted into the value of the first parameter.

[0053] In some embodiments, the display area is divided into multiple sub-regions arranged in an array, and the preset area includes at least one of the sub-regions.

[0054] In some embodiments, the preset area includes four sub-areas located at the corners of the display area.

[0055] In some embodiments, the length of the sub-region is no more than one-quarter of the length of the display area, and the width of the sub-region is no more than one-quarter of the width of the display area.

[0056] In some embodiments, after reducing the brightness of the color sub-pixels in the target region, the method further includes:

[0057] The step of repeatedly obtaining the difference value is performed. When the difference value is less than the second preset threshold value n times consecutively, the brightness of the colored 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.

[0058] In some embodiments, after reducing the brightness of the colored sub-pixels of the target region and increasing the brightness of the white sub-pixels of the target region, the method further includes:

[0059] After a second preset time period, the brightness of the color 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 the second preset threshold n times consecutively, the brightness of the color 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 is less than the first preset threshold.

[0060] In some embodiments, after reducing the brightness of the colored sub-pixels of the target region and increasing the brightness of the white sub-pixels of the target region, the method further includes:

[0061] After a second preset time period, the steps of decreasing and increasing the brightness of the color sub-pixels and / or white sub-pixels in the target area are repeatedly executed, and the step of obtaining the difference value is repeated. When the difference value is less than the second preset threshold n times consecutively, the brightness of the color 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 is less than the first preset threshold.

[0062] The embodiments disclosed herein have the following beneficial effects:

[0063] In the above scheme, when the target area is in a 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 a display state for a long time. If the target area is in a display state for a long time, the temperature difference between the target area and other areas will be relatively large, which is prone to image retention. Therefore, the brightness of the color sub-pixels of the target area can be reduced, thereby reducing the power consumption and current density of the target area, reducing the temperature difference between the target area and other areas, and eliminating image retention. Attached Figure Description

[0064] Figure 1 This is a schematic flowchart illustrating the processing method according to an embodiment of the present disclosure;

[0065] Figure 2a and Figure 2b This is a schematic diagram of a pixel driving circuit according to an embodiment of the present disclosure;

[0066] Figure 3 This is a schematic diagram illustrating the stages shown in the embodiments of this disclosure;

[0067] Figure 4 This is a schematic diagram of four sub-regions at the corner positions of the display area in an embodiment of this disclosure;

[0068] Figure 5 This is a schematic diagram illustrating the first values ​​of multiple sub-regions in an embodiment of this disclosure;

[0069] Figure 6 This is a schematic diagram illustrating the second values ​​of multiple sub-regions in an embodiment of this disclosure;

[0070] Figure 7 A flowchart illustrating the processing method is provided as a specific example of this disclosure.

[0071] Figure 8 A flowchart illustrating the processing method is shown as another specific example of this disclosure;

[0072] Figure 9 This is yet another specific example of the processing method shown in the disclosure;

[0073] Figure 10 A flowchart illustrating the processing method is shown as another specific example of this disclosure;

[0074] Figure 11 This is a structural block diagram of the processing device shown in an embodiment of the present disclosure. Detailed Implementation

[0075] To make the technical problems, technical solutions and advantages to be solved by the embodiments of this disclosure clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0076] This disclosure provides a display processing method, apparatus, and display device that can eliminate image retention in a display device.

[0077] Embodiments of this disclosure provide a display processing method applied to a display device, wherein the display area of ​​the display device includes color sub-pixels and white sub-pixels, such as... Figure 1 As shown, the method includes:

[0078] Step 101: When the display device is in video playback state, obtain a first value of at least one first parameter of a preset area of ​​the display area, wherein the first parameter corresponds to the driving transistor of the pixel driving circuit of the preset area, and the value of the first parameter is proportional to the threshold voltage of the corresponding driving transistor.

[0079] Specifically, the first parameter corresponds one-to-one with the driving transistor of the pixel driving circuit of the preset area, and each driving transistor has a first parameter.

[0080] Step 102: After the first preset time period, obtain the second value of each of the first parameters;

[0081] Step 103: Determine the target region based on the difference between the second value and the first value. At least a portion of the target region has a difference in the first parameter that is greater than a first preset threshold. The first preset threshold can be set as needed. When the difference in the first parameter is greater than the first preset threshold, the threshold voltage of the driving transistor changes significantly.

[0082] Step 104: Reduce the brightness of the colored sub-pixels in the target area.

[0083] In this embodiment, the color sub-pixel may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the light emitted by the color sub-pixel can be mixed to form white light.

[0084] In this embodiment, when the target area is in a 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 a display state for a long time. If the target area is in a display state for a long time, the temperature difference between the target area and other areas will be relatively large, which is prone to image retention. Therefore, the brightness of the color sub-pixels of the target area can be reduced, thereby reducing the power consumption and current density of the target area, reducing the temperature difference between the target area and other areas, and eliminating image retention.

[0085] In some embodiments, while reducing the brightness of the colored sub-pixels in the target region, the method further includes:

[0086] 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 colored sub-pixels, it is also necessary to correspondingly increase the brightness of the white sub-pixels in the target area. This will prevent the human eye from clearly perceiving a change in the brightness of the target area.

[0087] In this embodiment, as Figure 2a and Figure 2b As shown, 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), the gate of the first transistor (T1) is connected to a first gate line (G1), the first electrode of the first transistor (T1) is connected to a data line (DATA), and the second electrode of the first transistor (T1) is connected to a first node (G).

[0088] The external compensation control circuit includes a second transistor (T2), the gate of the second transistor (T2) is connected to the second gate line (G2), the first terminal of the second transistor (T2) is connected to the compensation control line (SENSE), and the second terminal of the second transistor (T2) is connected to the second node (S).

[0089] The driving circuit includes a driving transistor (T3), the gate of which is connected to the first node (G), the first terminal of which is connected to a high-level signal line (ELVDD), and the second terminal of which is connected to the second node (S). The driving transistor (T3) drives the light-emitting diode (OLED) to emit light.

[0090] 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).

[0091] The pixel driving circuits are arranged in rows and columns, with each row of pixel driving circuits corresponding to two rows of gate lines: the first gate line (G1) and the second gate line (G2), as follows: Figure 2a As shown, G1 <1> G2 is the first gate line of the first row pixel driving circuit. <1> G1 is the second gate line of the first row pixel driving circuit; <2> G2 is the first gate line of the second row pixel driving circuit. <2> G1 is the second gate line of the second row pixel driving circuit; <3> G2 is the first gate line of the third row pixel driving circuit. <3> This is the second gate line of the third row of pixel driving circuits. Each column of pixel driving circuits corresponds to a column of data lines. In this embodiment, the display device includes white sub-pixels and color sub-pixels. The color sub-pixels include red sub-pixels, blue sub-pixels, and green sub-pixels. DATA_R provides data signals for the pixel driving circuit of the red sub-pixels, DATA_W provides data signals for the pixel driving circuit of the white sub-pixels, DATA_B provides data signals for the pixel driving circuit of the blue sub-pixels, and DATA_G provides data signals for the pixel driving circuit of the green sub-pixels.

[0092] like Figure 2a As shown, multiple columns of sub-pixels can share a single compensation control line (SENSE); as Figure 2b As shown, multiple columns of sub-pixels can also not share the compensation control line (SENSE).

[0093] like Figure 3 As shown, the display stage of the display device includes four stages:

[0094] In the first stage, a high-potential electrical 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).

[0095] 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), and 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, and the second node (S) begins to charge. At this time, the compensation control line (SENSE) is floating.

[0096] 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), and 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, the voltage signal of the second node (S) can be obtained and the voltage signal is converted into the value of the first parameter.

[0097] In the fourth stage, a high-potential electrical signal is input to the first gate line (G1) and the second gate line (G2), and 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).

[0098] In this embodiment, the 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 characterize the duration of the driving transistor (T3) being turned on. By detecting the voltage signal of the second node (S), it is possible to detect whether the corresponding pixel driving circuit is in the display state for a long time.

[0099] When the display device is playing video, the logo area has high brightness and remains on display for extended periods. This high power consumption causes the logo area to heat up rapidly, creating a significant temperature difference with other areas and resulting in noticeable image retention. However, image retention isn't limited to the logo area; any area on display for a prolonged period is prone to this problem.

[0100] In this embodiment, the display area can be divided into multiple sub-regions arranged in an array, and each sub-region of the display area can be controlled separately. The preset area may include at least one of the sub-regions; that is, the display area may include one sub-region or multiple sub-regions. 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 the change in the value of the first parameter is used to determine whether the preset area is in a long-term display state. 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, the first value of the first parameter corresponding to the driving transistor is obtained. After a first preset time period, the second value of the first parameter is obtained. If the second value is greater than the first value and the difference between the second and first values ​​is greater than the 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 correspondingly, the preset area includes multiple first parameters. The change in the value of at least one first parameter in the preset area can be used to determine whether the preset area is in a long-term display state, and the preset area that is in a long-term display state is determined as the target area, and the target area is then displayed.

[0101] In this embodiment, in order to perform fine control of the display device, the length of the sub-region does not exceed one-quarter of the length of the display area, and the width of the sub-region does not exceed one-quarter of the width of the display area.

[0102] Generally, the logo area is located in one of the four sub-areas at the corners of the display area. Therefore, to reduce computation and detection load, the preset area can include these four sub-areas at the corners of the display area. However, to ensure effective image retention reduction, the preset area is not limited to these four sub-areas; it can also include all sub-areas of the display area. Figure 4 As shown, the display area is divided into 5*5 sub-areas, and the preset area can include four sub-areas A, B, C and D located at the corners of the display area.

[0103] In this embodiment, it can be determined whether the preset region is the target region based on the changes in the values ​​of some of the first parameters in the preset region, or it can be determined based on the changes in the values ​​of all the first parameters in the preset region.

[0104] In some embodiments, the target region satisfies at least one of the following:

[0105] When the difference between all the first parameters in the target area is greater than the first preset threshold, that is, when the difference between all the first parameters in the preset area is greater than the first preset threshold, the preset area is determined to be the target area.

[0106] If the difference between some first parameters within the target area is greater than a first preset threshold, that is, when the difference between all first parameters within 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 within the preset area is greater than this 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 this specific number, the preset area is determined to be the target area.

[0107] If the average value of the differences of all first parameters within the target area is greater than a first preset threshold, that is, if the average value of the differences of all first parameters within the preset area is calculated, and the preset area is determined to be the target area when the average value is greater than the first preset threshold.

[0108] In a specific example, at the first time point, the first value of the first parameter of all sub-regions of the display area is obtained, and the average of the first values ​​of the first parameter of all sub-regions is taken as the first value of that sub-region. The first value of each sub-region is as follows: Figure 5 As shown; 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 the first parameters of all sub-regions is taken as the second value of that sub-region. The second value of each sub-region is as follows: Figure 6 As shown, the difference between the first and second values ​​in the sub-region located at the upper left corner of the display area is 40, and the difference between the first and second values ​​in the sub-region located at the upper right corner of the display area is 70. Both are greater than the first preset threshold of 30. Therefore, the sub-regions located at the upper left and upper right corners of the display area can be determined as target areas. This embodiment uses a first preset threshold of 30 for illustration. Of course, the value of the first preset threshold is not limited to 30 and can be adjusted to other values ​​as needed.

[0109] In a specific example, the preset area includes four sub-areas located at the corners of the display area, such as... Figure 7 As shown, the display processing method in this embodiment includes the following steps:

[0110] Step 201: Determine whether the display device is in video playback mode;

[0111] Step 202: When the display device is in video playback mode, obtain the first value of the first parameter of the four sub-regions at the corner of the display area;

[0112] In this embodiment, the first value of the first parameter of all pixel driving circuits in each sub-region can be obtained, and the average value of the first parameter of all pixel driving circuits can be used as the first value of the first parameter of the sub-region.

[0113] Step 203: After 5 minutes, obtain the second value of the first parameter of the four sub-regions at the corner positions of the display area;

[0114] In this embodiment, the duration of the first preset time period can be 5 minutes. Of course, the duration of the first preset time period is not limited to 5 minutes, and other values ​​can be adjusted as needed.

[0115] In this embodiment, the second value of the first parameter of all pixel driving circuits in each sub-region can be obtained, and the average value of the second value of the first parameter of all pixel driving circuits can be used as the second value of the first parameter of the sub-region.

[0116] Step 204: Determine whether the difference between the second value and the first value is greater than the first preset threshold;

[0117] For each sub-region, subtract the first value from the second value to obtain the difference between the second value and the first value. Determine whether the difference between the second value and the first value is greater than the first preset threshold. If so, proceed to step 205.

[0118] Step 205: Determine the target area where the difference is greater than the first preset threshold;

[0119] The sub-regions where the difference between the second value and the first value is greater than a first preset threshold are defined as target regions. The first preset threshold can be 30, but it is not limited to 30 and can be adjusted to other values ​​as needed.

[0120] Step 206: Reduce the brightness of the colored sub-pixels in the target area and increase the brightness of the white sub-pixels in the target area;

[0121] In this embodiment, reducing the brightness of the color sub-pixels in the target area can reduce the power consumption and current density of the target area, reduce the temperature difference between the target area and other areas, and eliminate image retention. In order 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. After increasing the brightness of the white sub-pixels in the target area, the overall brightness of the target area remains unchanged, so that the human eye will not clearly perceive the change in the brightness of the target area.

[0122] In this embodiment, the brightness of the colored sub-pixels in the target area can be reduced to 90%, 80%, 70%, 60%, 50%, 40%, or 30% of the initial brightness.

[0123] Step 207: Repeat the step of obtaining the difference;

[0124] Specifically, steps 202-203 can be repeated to obtain the difference. For example, in the time period T1-T2, steps 202-203 are executed to obtain the first difference, where T2 is later than T1 and the time between them is 5 minutes; in the time period T2-T3, steps 202-203 are executed to obtain the second difference, where T3 is later than T2 and the time between them is 5 minutes; in the time period T3-T4, steps 202-203 are executed to obtain the third difference, where T4 is later than T3 and the time between them is 5 minutes, and so on, to obtain multiple consecutive differences.

[0125] Step 208: When the difference is less than the second preset threshold n times consecutively, restore the brightness of the colored sub-pixels of the target area.

[0126] 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 can be 15. When the difference is less than the second preset threshold multiple times consecutively, it indicates that the target area is no longer in a long-term display state, and the brightness of the colored sub-pixels of the target area can be restored, that is, the brightness of the colored sub-pixels of the target area can be restored to the initial brightness. At the same time, the brightness of the white sub-pixels of the target area can also be restored, that is, the brightness of the white sub-pixels of the target area can be restored to the initial brightness.

[0127] In another specific example, the preset area includes all sub-areas of the display area, such as... Figure 8 As shown, the display processing method in this embodiment includes the following steps:

[0128] Step 301: Determine whether the display device is in video playback mode;

[0129] Step 302: When the display device is in video playback mode, obtain the first value of the first parameter of all sub-regions of the display area;

[0130] In this embodiment, the first value of the first parameter of all pixel driving circuits in each sub-region can be obtained, and the average value of the first parameter of all pixel driving circuits can be used as the first value of the first parameter of the sub-region.

[0131] Step 303: After 5 minutes, obtain the second value of the first parameter for all sub-regions of the display area;

[0132] In this embodiment, the duration of the first preset time period can be 5 minutes. Of course, the duration of the first preset time period is not limited to 5 minutes, and other values ​​can be adjusted as needed.

[0133] In this embodiment, the second value of the first parameter of all pixel driving circuits in each sub-region can be obtained, and the average value of the second value of the first parameter of all pixel driving circuits can be used as the second value of the first parameter of the sub-region.

[0134] Step 304: Determine whether the difference between the second value and the first value is greater than the first preset threshold;

[0135] For each sub-region, subtract the first value from the second value to obtain the difference between the second value and the first value. Determine whether the difference between the second value and the first value is greater than the first preset threshold. If so, proceed to step 305.

[0136] Step 305: Determine the target area where the difference is greater than the first preset threshold;

[0137] The sub-regions where the difference between the second value and the first value is greater than a first preset threshold are defined as target regions. The first preset threshold can be 30, but it is not limited to 30 and can be adjusted to other values ​​as needed.

[0138] In a specific example, at the first time point, the first value of the first parameter of all sub-regions of the display area is obtained, and the average of the first values ​​of the first parameter of all sub-regions is taken as the first value of that sub-region. The first value of each sub-region is as follows: Figure 5 As shown; at the second time point 5 minutes later, obtain the second value of the first parameter of all sub-regions of the display area, and take the average of the second values ​​of the first parameter of all sub-regions as the second value of that sub-region. The second value of each sub-region is as follows. Figure 6 As shown, the difference between the first and second values ​​of the sub-region located in the upper left corner of the display area is 40, and the difference between the first and second values ​​of the sub-region located in the upper right corner of the display area is 70. Both 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.

[0139] Step 306: Reduce the brightness of the colored sub-pixels in the target area and increase the brightness of the white sub-pixels in the target area;

[0140] In this embodiment, reducing the brightness of the color sub-pixels in the target area can reduce the power consumption and current density of the target area, reduce the temperature difference between the target area and other areas, and eliminate image retention. In order 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. After increasing the brightness of the white sub-pixels in the target area, the overall brightness of the target area remains unchanged, so that the human eye will not clearly perceive the change in the brightness of the target area.

[0141] In this embodiment, the brightness of the colored sub-pixels in the target area can be reduced to 90%, 80%, 70%, 60%, 50%, 40%, or 30% of the initial brightness.

[0142] Step 307: Repeat the step of obtaining the difference;

[0143] Specifically, steps 302-303 can be repeated to obtain the difference. For example, in the time period T1-T2, steps 302-303 are executed to obtain the first difference, where T2 is later than T1 and the time between them is 5 minutes; in the time period T2-T3, steps 302-303 are executed to obtain the second difference, where T3 is later than T2 and the time between them is 5 minutes; in the time period T3-T4, steps 302-303 are executed to obtain the third difference, where T4 is later than T3 and the time between them is 5 minutes, and so on, to obtain multiple consecutive differences.

[0144] Step 308: When the difference is less than the second preset threshold n times consecutively, restore the brightness of the colored sub-pixels of the target area.

[0145] 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 can be 15. When the difference is less than the second preset threshold multiple times consecutively, it indicates that the target area is no longer in a long-term display state, and the brightness of the colored sub-pixels of the target area can be restored, that is, the brightness of the colored sub-pixels of the target area can be restored to the initial brightness. At the same time, the brightness of the white sub-pixels of the target area can also be restored, that is, the brightness of the white sub-pixels of the target area can be restored to the initial brightness.

[0146] In another specific example, the preset area includes four sub-areas located at the corners of the display area, such as... Figure 9 As shown, the display processing method in this embodiment includes the following steps:

[0147] Step 401: Determine whether the display device is in video playback mode;

[0148] Step 402: When the display device is in video playback mode, obtain the first value of the first parameter of the four sub-regions at the corner of the display area;

[0149] In this embodiment, the first value of the first parameter of all pixel driving circuits in each sub-region can be obtained, and the average value of the first parameter of all pixel driving circuits can be used as the first value of the first parameter of the sub-region.

[0150] Step 403: After 5 minutes, obtain the second value of the first parameter of the four sub-regions at the corner positions of the display area;

[0151] In this embodiment, the duration of the first preset time period can be 5 minutes. Of course, the duration of the first preset time period is not limited to 5 minutes, and other values ​​can be adjusted as needed.

[0152] In this embodiment, the second value of the first parameter of all pixel driving circuits in each sub-region can be obtained, and the average value of the second value of the first parameter of all pixel driving circuits can be used as the second value of the first parameter of the sub-region.

[0153] Step 404: Determine whether the difference between the second value and the first value is greater than the first preset threshold;

[0154] For each sub-region, subtract the first value from the second value to obtain the difference between the second value and the first value. Determine whether the difference between the second value and the first value is greater than the first preset threshold. If so, proceed to step 405.

[0155] Step 405: Determine the target area where the difference is greater than the first preset threshold;

[0156] The sub-regions where the difference between the second value and the first value is greater than a first preset threshold are defined as target regions. The first preset threshold can be 30, but it is not limited to 30 and can be adjusted to other values ​​as needed.

[0157] Step 406: Reduce the brightness of the colored sub-pixels in the target area and increase the brightness of the white sub-pixels in the target area;

[0158] In this embodiment, reducing the brightness of the color sub-pixels in the target area can reduce the power consumption and current density of the target area, reduce the temperature difference between the target area and other areas, and eliminate image retention. In order 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. After increasing the brightness of the white sub-pixels in the target area, the overall brightness of the target area remains unchanged, so that the human eye will not clearly perceive the change in the brightness of the target area.

[0159] In this embodiment, the brightness of the colored sub-pixels in the target area can be reduced to 90%, 80%, 70%, 60%, 50%, 40%, or 30% of the initial brightness.

[0160] Step 407: After 5 minutes, reduce the brightness of the colored subpixels and / or white subpixels in the target area;

[0161] In this embodiment, the overall brightness of the target area can be reduced to further reduce image retention. The brightness of only the color sub-pixels of the target area can be reduced, or only the brightness of the white sub-pixels of the target area can be reduced, or the brightness of both the color sub-pixels and the white sub-pixels of the target area can be reduced simultaneously.

[0162] Step 408: Repeat the step of obtaining the difference;

[0163] Specifically, steps 402-403 can be repeated to obtain the difference. For example, in the time period T1-T2, steps 402-403 are executed to obtain the first difference, where T2 is later than T1 and the time between them is 5 minutes; in the time period T2-T3, steps 402-403 are executed to obtain the second difference, where T3 is later than T2 and the time between them is 5 minutes; in the time period T3-T4, steps 402-403 are executed to obtain the third difference, where T4 is later than T3 and the time between them is 5 minutes, and so on, to obtain multiple consecutive differences.

[0164] Step 409: When the difference is less than the second preset threshold n times consecutively, restore the brightness of the colored sub-pixels of the target area.

[0165] 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 can be 15. When the difference is less than the second preset threshold multiple times consecutively, it indicates that the target area is no longer in a long-term display state, and the brightness of the colored sub-pixels of the target area can be restored, that is, the brightness of the colored sub-pixels of the target area can be restored to the initial brightness. At the same time, the brightness of the white sub-pixels of the target area can also be restored, that is, the brightness of the white sub-pixels of the target area can be restored to the initial brightness.

[0166] In another specific example, the preset area includes four sub-areas located at the corners of the display area, such as... Figure 10 As shown, the display processing method in this embodiment includes the following steps:

[0167] Step 501: Determine whether the display device is in video playback mode;

[0168] Step 502: When the display device is in video playback mode, obtain the first value of the first parameter of the four sub-regions at the corner of the display area;

[0169] In this embodiment, the first value of the first parameter of all pixel driving circuits in each sub-region can be obtained, and the average value of the first parameter of all pixel driving circuits can be used as the first value of the first parameter of the sub-region.

[0170] Step 503: After 5 minutes, obtain the second value of the first parameter of the four sub-regions at the corner positions of the display area;

[0171] In this embodiment, the duration of the first preset time period can be 5 minutes. Of course, the duration of the first preset time period is not limited to 5 minutes, and other values ​​can be adjusted as needed.

[0172] In this embodiment, the second value of the first parameter of all pixel driving circuits in each sub-region can be obtained, and the average value of the second value of the first parameter of all pixel driving circuits can be used as the second value of the first parameter of the sub-region.

[0173] Step 504: Determine whether the difference between the second value and the first value is greater than the first preset threshold;

[0174] For each sub-region, subtract the first value from the second value to obtain the difference between the second value and the first value. Determine whether the difference between the second value and the first value is greater than the first preset threshold. If so, proceed to step 505.

[0175] Step 505: Determine the target area where the difference is greater than the first preset threshold;

[0176] The sub-regions where the difference between the second value and the first value is greater than a first preset threshold are defined as target regions. The first preset threshold can be 30, but it is not limited to 30 and can be adjusted to other values ​​as needed.

[0177] Step 506: Reduce the brightness of the colored sub-pixels in the target area and increase the brightness of the white sub-pixels in the target area;

[0178] In this embodiment, reducing the brightness of the color sub-pixels in the target area can reduce the power consumption and current density of the target area, reduce the temperature difference between the target area and other areas, and eliminate image retention. In order 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. After increasing the brightness of the white sub-pixels in the target area, the overall brightness of the target area remains unchanged, so that the human eye will not clearly perceive the change in the brightness of the target area.

[0179] In this embodiment, the brightness of the colored sub-pixels in the target area can be reduced to 90%, 80%, 70%, 60%, 50%, 40%, or 30% of the initial brightness.

[0180] Step 507: After 5 minutes, reduce the brightness of the colored subpixels and / or white subpixels in the target area;

[0181] In this embodiment, the overall brightness of the target area can be reduced to further reduce image retention. The brightness of only the color sub-pixels of the target area can be reduced, or only the brightness of the white sub-pixels of the target area can be reduced, or the brightness of both the color sub-pixels and the white sub-pixels of the target area can be reduced simultaneously.

[0182] Step 508: After 10 minutes, increase the brightness of the colored subpixels and / or white subpixels in the target area;

[0183] In this embodiment, the brightness of only the color sub-pixels of the target area can be increased, the brightness of only the white sub-pixels of the target area can be increased, or the brightness of both the color sub-pixels and the white sub-pixels of the target area can be increased simultaneously.

[0184] Steps 507-508 involve cyclical changes in the brightness and color of the target area, which helps to reduce image retention in the target area.

[0185] Step 509: Repeat the step of obtaining the difference;

[0186] Specifically, while cyclically executing steps 507-508, steps 502-503 can be repeatedly executed to obtain the difference. For example, in the time period T1-T2, steps 502-503 are executed to obtain the first difference, where T2 is later than T1 and the time between them is 5 minutes; in the time period T2-T3, steps 502-503 are executed to obtain the second difference, where T3 is later than T2 and the time between them is 5 minutes; in the time period T3-T4, steps 502-503 are executed to obtain the third difference, where T4 is later than T3 and the time between them is 5 minutes, and so on, to obtain multiple consecutive differences.

[0187] The process involves repeatedly executing steps 507-508. Specifically, step 507 is executed during the time interval T1-T2; step 508 is executed during the time interval T2-T3; step 507 is executed during the time interval T3-T4; step 508 is executed during the time interval T4-T5, and so on. T5 is later than T4, and the time interval between T5 and T4 is 5 minutes.

[0188] Step 510: When the difference is less than the second preset threshold n times consecutively, restore the brightness of the colored sub-pixels of the target area.

[0189] 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 can be 15. When the difference is less than the second preset threshold multiple times consecutively, it indicates that the target area is no longer in a long-term display state, and the brightness of the colored sub-pixels of the target area can be restored, that is, the brightness of the colored sub-pixels of the target area can be restored to the initial brightness. At the same time, the brightness of the white sub-pixels of the target area can also be restored, that is, the brightness of the white sub-pixels of the target area can be restored to the initial brightness.

[0190] This disclosure also provides a display processing apparatus applied to a display device, wherein the display area of ​​the display device includes color sub-pixels and white sub-pixels, such as... Figure 11 As shown, the device includes:

[0191] The acquisition module 61 is 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, wherein the first parameter corresponds to the driving transistor of the pixel driving circuit of the preset area, and the value of the first parameter is proportional to the threshold voltage of the corresponding driving transistor; and acquire a second value of each first parameter after a first preset time period.

[0192] The determining module 62 is used to determine a target region based on the difference between the second value and the first value, wherein at least a portion of the first parameter of the target region has a difference greater than a first preset threshold.

[0193] Processing module 63 is used to reduce the brightness of the colored sub-pixels in the target area.

[0194] In this embodiment, when the target area is in a 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 a display state for a long time. If the target area is in a display state for a long time, the temperature difference between the target area and other areas will be relatively large, which is prone to image retention. Therefore, the brightness of the color sub-pixels of the target area can be reduced, thereby reducing the power consumption and current density of the target area, reducing the temperature difference between the target area and other areas, and eliminating image retention.

[0195] In some embodiments, the processing module 63 is further configured to increase the brightness of the white sub-pixels in the target area while reducing the brightness of the colored sub-pixels. To ensure the overall brightness of the target area, while reducing the brightness of the colored sub-pixels, it is also necessary to correspondingly increase the brightness of the white sub-pixels in the target area, so that the human eye will not clearly perceive a change in the brightness of the target area.

[0196] In this embodiment, as Figure 2a and Figure 2b As shown, 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), the gate of the first transistor (T1) is connected to a first gate line (G1), the first electrode of the first transistor (T1) is connected to a data line (DATA), and the second electrode of the first transistor (T1) is connected to a first node (G).

[0197] The external compensation control circuit includes a second transistor (T2), the gate of the second transistor (T2) is connected to the second gate line (G2), the first terminal of the second transistor (T2) is connected to the compensation control line (SENSE), and the second terminal of the second transistor (T2) is connected to the second node (S).

[0198] The driving circuit includes a driving transistor (T3), the gate of which is connected to the first node (G), the first terminal of which is connected to a high-level signal line (ELVDD), and the second terminal of which is connected to the second node (S). The driving transistor (T3) drives the light-emitting diode (OLED) to emit light.

[0199] 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).

[0200] The pixel driving circuits are arranged in rows and columns, with each row of pixel driving circuits corresponding to two rows of gate lines: the first gate line (G1) and the second gate line (G2), as follows: Figure 2a As shown, G1 <1> G2 is the first gate line of the first row pixel driving circuit. <1> G1 is the second gate line of the first row pixel driving circuit; <2> G2 is the first gate line of the second row pixel driving circuit. <2> G1 is the second gate line of the second row pixel driving circuit; <3> G2 is the first gate line of the third row pixel driving circuit. <3> This is the second gate line of the third row of pixel driving circuits. Each column of pixel driving circuits corresponds to a column of data lines. In this embodiment, the display device includes white sub-pixels and color sub-pixels. The color sub-pixels include red sub-pixels, blue sub-pixels, and green sub-pixels. DATA_R provides data signals for the pixel driving circuit of the red sub-pixels, DATA_W provides data signals for the pixel driving circuit of the white sub-pixels, DATA_B provides data signals for the pixel driving circuit of the blue sub-pixels, and DATA_G provides data signals for the pixel driving circuit of the green sub-pixels.

[0201] like Figure 2a As shown, multiple columns of sub-pixels can share a single compensation control line (SENSE); as Figure 2bAs shown, multiple columns of sub-pixels can also not share the compensation control line (SENSE).

[0202] like Figure 3 As shown, the display stage of the display device includes four stages:

[0203] In the first stage, a high-potential electrical 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).

[0204] 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), and 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, and the second node (S) begins to charge. At this time, the compensation control line (SENSE) is floating.

[0205] 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), and 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, the voltage signal of the second node (S) can be obtained and the voltage signal is converted into the value of the first parameter.

[0206] In the fourth stage, a high-potential electrical signal is input to the first gate line (G1) and the second gate line (G2), and 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).

[0207] In this embodiment, the acquisition module 61 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. The voltage signal of the second node (S) is proportional to the threshold voltage of the driving transistor (T3) and can characterize the duration of the driving transistor (T3) being turned on. By detecting the voltage signal of the second node (S), it is possible to detect whether the corresponding pixel driving circuit is in the display state for a long time.

[0208] When the display device is playing video, the logo area has high brightness and remains on display for extended periods. This high power consumption causes the logo area to heat up rapidly, creating a significant temperature difference with other areas and resulting in noticeable image retention. However, image retention isn't limited to the logo area; any area on display for a prolonged period is prone to this problem.

[0209] In this embodiment, the display area can be divided into multiple sub-regions arranged in an array, and each sub-region of the display area can be controlled separately. The preset area may include at least one of the sub-regions; that is, the display area may include one sub-region or multiple sub-regions. 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 the change in the value of the first parameter is used to determine whether the preset area is in a long-term display state. 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, the first value of the first parameter corresponding to the driving transistor is obtained. After a first preset time period, the second value of the first parameter is obtained. If the second value is greater than the first value and the difference between the two values ​​is greater than the 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 correspondingly, the preset area includes multiple first parameters. The change in the value of at least one first parameter in the preset area can be used to determine whether the preset area is in a long-term display state, and the preset area that is in a long-term display state is determined as the target area, and the target area is then displayed.

[0210] In this embodiment, in order to perform fine control of the display device, the length of the sub-region does not exceed one-quarter of the length of the display area, and the width of the sub-region does not exceed one-quarter of the width of the display area.

[0211] Generally, the logo area is located in one of the four sub-areas at the corners of the display area. Therefore, to reduce computation and detection load, the preset area can include these four sub-areas at the corners of the display area. However, to ensure effective image retention reduction, the preset area is not limited to these four sub-areas; it can also include all sub-areas of the display area. Figure 4 As shown, the display area is divided into 5*5 sub-areas, and the preset area can include four sub-areas A, B, C and D located at the corners of the display area.

[0212] In this embodiment, it can be determined whether the preset region is the target region based on the changes in the values ​​of some of the first parameters in the preset region, or it can be determined based on the changes in the values ​​of all the first parameters in the preset region.

[0213] In some embodiments, the target region satisfies at least one of the following:

[0214] When the difference between all the first parameters in the target area is greater than the first preset threshold, that is, when the difference between all the first parameters in the preset area is greater than the first preset threshold, the preset area is determined to be the target area.

[0215] If the difference between some first parameters within the target area is greater than a first preset threshold, that is, when the difference between all first parameters within 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 within the preset area is greater than this 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 this specific number, the preset area is determined to be the target area.

[0216] If the average value of the differences of all first parameters within the target area is greater than a first preset threshold, that is, if the average value of the differences of all first parameters within the preset area is calculated, and the preset area is determined to be the target area when the average value is greater than the first preset threshold.

[0217] In a specific example, at the first time point, the first value of the first parameter of all sub-regions of the display area is obtained, and the average of the first values ​​of the first parameter of all sub-regions is taken as the first value of that sub-region. The first value of each sub-region is as follows: Figure 5 As shown; 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 the first parameters of all sub-regions is taken as the second value of that sub-region. The second value of each sub-region is as follows: Figure 6 As shown, the difference between the first and second values ​​in the sub-region located at the upper left corner of the display area is 40, and the difference between the first and second values ​​in the sub-region located at the upper right corner of the display area is 70. Both are greater than the first preset threshold of 30. Therefore, the sub-regions located at the upper left and upper right corners of the display area can be determined as target areas. This embodiment uses a first preset threshold of 30 for illustration. Of course, the value of the first preset threshold is not limited to 30 and can be adjusted to other values ​​as needed.

[0218] In some embodiments, the processing module 63 is further configured to repeat the step of obtaining the difference after reducing the brightness of the color sub-pixels of the target area, and restore the brightness of the color sub-pixels of the target area when the difference is less than a second preset threshold n times consecutively, where n is an integer greater than 2 and the second preset threshold is less than the first preset threshold.

[0219] In some embodiments, the processing module 63 is further configured 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, after a second preset time period, reduce the brightness of the colored sub-pixels and / or white sub-pixels of the target area and repeat the step of obtaining the difference value, and restore the brightness of the colored sub-pixels and / or white sub-pixels of the target area when the difference value is less than a second preset threshold n times consecutively, where n is an integer greater than 2, and the second preset threshold value is less than the first preset threshold value.

[0220] In some embodiments, the processing module 63 is further configured 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, after a second preset time period, repeatedly execute the steps of reducing and increasing the brightness of the colored sub-pixels and / or white sub-pixels of the target area, and repeatedly obtain the difference value, and restore the brightness of the colored sub-pixels and / or white sub-pixels of the target area when the difference value is less than a second preset threshold n times consecutively, where n is an integer greater than 2, and the second preset threshold is less than the first preset threshold.

[0221] This disclosure also provides a display device, including the display processing apparatus described above.

[0222] 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 understand that the structure of the display device described above does not constitute a limitation on the display device; the display device may include more or fewer of the aforementioned components, or combine certain components, or arrange different components. In the embodiments of this disclosure, the display device includes, but is not limited to, a monitor, a mobile phone, a tablet computer, a television set, a wearable electronic device, a navigation display device, etc.

[0223] The display device can be any product or component with display function, such as a television, monitor, digital photo frame, mobile phone, or tablet computer. The display device also includes a flexible circuit board, a printed circuit board, and a backplate.

[0224] In the various method embodiments of this disclosure, the sequence numbers of each step are not intended to limit the order of the steps. For those skilled in the art, any changes in the order of the steps are within the scope of protection of this disclosure without any creative effort.

[0225] It should be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, since the embodiments are basically similar to the product embodiments, the descriptions are relatively simple, and the relevant parts can be referred to the descriptions of the product embodiments.

[0226] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0227] It is understandable that when a component such as a layer, film, region, or substrate is referred to as being "above" or "below" another component, the component may be "directly" located "above" or "below" the other component, or there may be intermediate components present.

[0228] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0229] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims. 。

Claims

1. A display processing device, characterized in that, Applied to a display device, wherein the display area of ​​the display device includes color sub-pixels and white sub-pixels, the device includes: The acquisition module is 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, 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 the threshold voltage of the corresponding driving transistor; and acquire a second value of each of the first parameters after a first preset time period. The determining module is used to determine a target area based on the difference between the second value and the first value, wherein at least a portion of the difference between the first parameters of the target area is greater than a first preset threshold, and the target area is an area that has been in a display state for a long time; The processing module is used to reduce the brightness of the colored sub-pixels in the target area.

2. The display processing device according to claim 1, characterized in that, The processing module is also used to increase the brightness of the white sub-pixels in the target area while reducing the brightness of the colored sub-pixels in the target area.

3. The display processing device according to claim 1, characterized in that, The target area satisfies at least one of the following: The difference between all first parameters within the target area is greater than a first preset threshold. The difference between some of the first parameters within the target area is greater than a first preset threshold; The average of the differences of all first parameters within the target area is greater than a first preset threshold.

4. The display processing apparatus according to any one of claims 1-3, 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, the gate of the first transistor is connected to a first gate line, the first electrode of the first transistor is connected to a data line, and the second electrode of the first transistor is connected to a first node. The external control compensation circuit includes a second transistor, the gate of the second transistor is connected to a second gate line, the first terminal of the second transistor is connected to a compensation control line, and the second terminal of the second transistor is connected to a second node; The driving circuit includes a driving transistor, the gate of which is connected to the first node, the first terminal of which is connected to a high-level signal line, and the second terminal of which 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 phase 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 electrical signal is input to the first gate line, a high-potential electrical signal is input to the second gate line, and the potential of the electrical signal input to the compensation control line gradually increases. 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; Specifically, the acquisition module is 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 multiple sub-areas arranged in an array, and the preset area includes at least one of the sub-areas.

6. The display processing apparatus 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 apparatus according to claim 1 or 2, characterized in that, The processing module is further configured to repeat the step of obtaining the difference after reducing the brightness of the color sub-pixels in the target area, and restore the brightness of the color sub-pixels in the target area when the difference is less than the 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.

8. The display processing apparatus according to claim 2, characterized in that, The processing module is further configured 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, after a second preset time period, reduce the brightness of the colored sub-pixels and / or the white sub-pixels of the target area and repeat the step of obtaining the difference value, and when the difference value is less than the second preset threshold value n times consecutively, restore the brightness of the colored sub-pixels and / or the white sub-pixels 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.

9. The display processing apparatus according to claim 2, characterized in that, The processing module is further configured 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, after a second preset time period, repeatedly execute the steps of reducing and increasing the brightness of the colored sub-pixels and / or white sub-pixels of the target area, and repeatedly obtain the difference value, and restore the brightness of the colored sub-pixels and / or white sub-pixels of the target area when the difference value is less than the second preset threshold n times consecutively, where n is an integer greater than 2, and the second preset threshold is less than the first preset threshold.

10. A display device, characterized in that, Includes the display processing apparatus as described in any one of claims 1-9.

11. A display processing method, characterized in that, Applied to a display device, wherein the display area of ​​the display device includes color subpixels and white subpixels, the method includes: When the display device is in video playback mode, a first value of at least one first parameter of a preset area of ​​the display area is obtained. The first parameter corresponds to the driving transistor of the pixel driving circuit of the preset area, and the value of the first parameter is proportional to the threshold voltage of the corresponding driving transistor. After a first preset time period, obtain the second value of each of the first parameters; The target area is determined based on the difference between the second value and the first value, wherein at least a portion of the difference between the first parameters in the target area is greater than a first preset threshold, and the target area is an area that is in a display state for a long time. Reduce the brightness of the colored sub-pixels in the target area.

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

13. The display processing method according to claim 11, characterized in that, The target area satisfies at least one of the following: The difference between all first parameters within the target area is greater than a first preset threshold. The difference between some of the first parameters within the target area is greater than a first preset threshold; The average of the differences of all first parameters within the target area is greater than a first preset threshold.

14. The display processing method according to any one of claims 11-13, 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, the gate of the first transistor is connected to a first gate line, the first electrode of the first transistor is connected to a data line, and the second electrode of the first transistor is connected to a first node. The external control compensation circuit includes a second transistor, the gate of the second transistor is connected to a second gate line, the first terminal of the second transistor is connected to a compensation control line, and the second terminal of the second transistor is connected to a second node; The driving circuit includes a driving transistor, the gate of which is connected to the first node, the first terminal of which is connected to a high-level signal line, and the second terminal of which 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 phase 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 electrical signal is input to the first gate line, a high-potential electrical signal is input to the second gate line, and the potential of the electrical signal input to the compensation control line gradually increases. 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 value of at least one first parameter for obtaining the preset area of ​​the display area includes: In the third stage, the voltage signal of the second node is acquired, and the voltage signal is converted into the value of the first parameter.

15. The display processing method according to claim 11, characterized in that, The display area is divided into multiple 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 area, and the width of the sub-region does not exceed one-quarter of the width of the display area.

18. The display processing method according to claim 11 or 12, characterized in that, After reducing the brightness of the colored sub-pixels in the target region, the method further includes: The step of repeatedly obtaining the difference value is performed. When the difference value is less than the second preset threshold value n times consecutively, the brightness of the colored 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.

19. The display processing method according to claim 12, characterized in that, After reducing the brightness of the colored sub-pixels in the target region and increasing the brightness of the white sub-pixels in the target region, the method further includes: After a second preset time period, the brightness of the color 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 the second preset threshold n times consecutively, the brightness of the color 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 is less than the first preset threshold.

20. The display processing method according to claim 12, characterized in that, After reducing the brightness of the colored sub-pixels in the target region and increasing the brightness of the white sub-pixels in the target region, the method further includes: After a second preset time period, the steps of decreasing and increasing the brightness of the color sub-pixels and / or white sub-pixels in the target area are repeatedly executed, and the step of obtaining the difference value is repeated. When the difference value is less than the second preset threshold n times consecutively, the brightness of the color 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 is less than the first preset threshold.

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