Array substrate and driving method therefor, and electronic paper display panel

Abstract

An array substrate (100) and a driving method therefor, and an electronic paper display panel (10), wherein each pixel electrode (261) corresponds to each pixel region (330) in a one-to-one manner; each common electrode sheet (400) corresponds to each pixel region (330) in a one-to-one manner, one common electrode sheet (400) comprises a plurality of sub-common electrodes (410), and within a same pixel region (330), an orthogonal projection of the pixel electrode (261) covers orthogonal projections of the plurality of sub-common electrodes (410); the array substrate (100) further comprises a control module (600), and the control module (600) is capable of selecting a number of sub-common electrodes (410) to be connected in a same pixel region (330) according to a temperature on the array substrate (100).

Description

Array substrate and its driving method, electronic paper display panel

[0001] This application claims priority to Chinese Patent Application No. 2024115148522, filed on October 29, 2024, entitled “Array Substrate and Driving Method Thereof, Electronic Paper Display Panel”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, and in particular to an array substrate and its driving method, and an electronic paper display panel. Background Technology

[0003] With the development of digital technology, more and more display devices are entering people's lives, such as electronic paper display panels. Electronic paper display panels are made by uniformly dispersing charged particles in a medium solution with a certain viscosity, and using the electric field between the pixel electrodes and the common electrode to make the charged particles undergo electrophoretic motion to display the image.

[0004] Existing electronic paper display panels that achieve display by driving the movement of electrophoretic particles through an electric field formed between pixel electrodes and a common electrode will exhibit blurry images under high or low temperatures. Summary of the Invention

[0005] The purpose of this application is to provide an array substrate and its driving method, as well as an electronic paper display panel, to prevent the electronic paper display panel from displaying blurry images at high and low temperatures.

[0006] This application discloses an array substrate used in an electronic paper display panel. The array substrate includes a substrate, data lines, scan lines, and pixel electrodes. The data lines and scan lines are both disposed on the substrate, and the data lines and scan lines intersect to define multiple pixel regions. The pixel electrodes are disposed on the substrate, and each pixel electrode corresponds to each pixel region.

[0007] The array substrate further includes a common electrode sheet, which is disposed on the substrate. Each common electrode sheet corresponds one-to-one with each pixel region. One common electrode sheet includes multiple sub-common electrodes, and the orthogonal projection of the pixel electrode in the same pixel region covers the orthogonal projection of multiple sub-common electrodes.

[0008] The array substrate also includes a control module, which can select the number of sub-common electrodes connected in the same pixel region according to the temperature on the array substrate.

[0009] Optionally, the number of sub-common electrodes includes three, which are defined as a first sub-common electrode, a second sub-common electrode, and a third sub-common electrode, respectively. The area of ​​the first sub-common electrode is larger than the area of ​​the second sub-common electrode, and the area of ​​the second sub-common electrode is larger than the area of ​​the third sub-common electrode.

[0010] Optionally, the array substrate further includes a first common electrode trace, a second common electrode trace, and a third common electrode trace, all of which are disposed on the substrate. The first common electrode trace is connected to the first sub-common electrode, the second common electrode trace is connected to the second sub-common electrode, and the third common electrode trace is connected to the third common electrode. The first common electrode trace is used to receive an external common electrode signal, the second common electrode trace is used to receive an external common electrode signal, and the third common electrode trace is used to receive an external common electrode signal.

[0011] The control module includes a sixth control switch group, a seventh control switch group, and an eighth control switch group. The sixth control switch group is located at the input end of the first common electrode trace, the seventh control switch group is located at the input end of the second common electrode trace, and the eighth control switch group is located at the input end of the third common electrode trace. The sixth control switch group includes two sub-active switches, the seventh control switch group includes one sub-active switch, and the eighth control switch group includes one sub-active switch.

[0012] The control module further includes a first resistor, a second resistor, a third resistor, and a controllable resistor. The first resistor and the second resistor have equal resistance values, and the third resistor has a resistance value less than the first resistor. The first resistor is disposed on the first common electrode trace and located on the side of the sixth control switch group away from the first sub-common electrode. The second resistor is disposed on the second common electrode trace and located on the side of the seventh control switch group away from the second sub-common electrode. The third resistor and the controllable resistor are connected in series on the third common electrode trace and located on the side of the eighth control switch group away from the third sub-common electrode. The controllable resistor can make the sum of the resistances of the third resistor and the controllable resistor greater than or equal to the resistance value of the first resistor.

[0013] The control module further includes a first control line and a third control line. The first control line is connected to a sub-active switch in the sixth control switch group, a sub-active switch in the seventh control switch group, and a sub-active switch in the eighth control switch group. It can be used to control the on / off state of the first common electrode trace, the second common electrode trace, and the third common electrode trace. The third control line is only connected to another sub-active switch in the sixth control switch group. It can be used to control the on / off state of the first common electrode trace.

[0014] Optionally, the array substrate includes a display area and a non-display area. The display area includes a first temperature region and a second temperature region. Multiple pixel regions are disposed in the first temperature region and multiple pixel regions are disposed in the second temperature region. The number of sub-common electrodes in a single pixel region in the first temperature region is greater than the number of sub-common electrodes in a single pixel region in the second temperature region.

[0015] Optionally, the display area further includes a transition region located between the first temperature region and the second temperature region, wherein the number of sub-common electrodes in a single pixel region within the first temperature region is greater than the number of sub-common electrodes in a single pixel region within the transition region, and the number of sub-common electrodes in a single pixel region within the transition region is greater than the number of sub-common electrodes in a single pixel region within the second temperature region.

[0016] Optionally, the array substrate further includes a driver chip connection terminal located in the non-display area, and the second temperature region is located on the side of the first temperature region away from the driver chip connection terminal.

[0017] Optionally, the array substrate further includes a first common electrode trace, a second common electrode trace, and a third common electrode trace, all of which are disposed on the substrate. The first common electrode trace is connected to the first sub-common electrode, the second common electrode trace is connected to the second sub-common electrode, and the third common electrode trace is connected to the third common electrode. The first common electrode trace is used to receive an external common electrode signal, the second common electrode trace is used to receive an external common electrode signal, and the third common electrode trace is used to receive an external common electrode signal.

[0018] The control module includes a first control switch group, a second control switch group, and a third control switch group. The first control switch group is located at the input end of the first common electrode trace, the second control switch group is located at the input end of the second common electrode trace, and the third control switch group is located at the input end of the third common electrode trace. The first control switch group includes three sub-active switches, defined as the first sub-active switch, the second sub-active switch, and the third sub-active switch, respectively. The second control switch group includes two sub-active switches, defined as the fourth sub-active switch and the fifth active switch, respectively. The third control switch group includes three sub-active switches, defined as the sixth sub-active switch.

[0019] The control module further includes a first control line, a second control line, and a third control line. The first control line is connected to the first sub-active switch, the fourth sub-active switch, and the sixth sub-active switch simultaneously, and can be used to simultaneously control the on / off state of the first common electrode trace, the second common electrode trace, and the third common electrode trace. The second control line is connected to the third sub-active switch and the fifth sub-active switch simultaneously, and can be used to simultaneously control the on / off state of the first common electrode trace and the second common electrode trace. The third control line is only connected to the second sub-active switch and can be used to control the on / off state of the first common electrode trace.

[0020] This application also discloses a driving method for an array substrate, the driving method being used for the array substrate described above, the driving method comprising the steps of:

[0021] The temperature on the array substrate is obtained;

[0022] When the temperature reaches the preset temperature, the control module controls the preset number of sub-common electrodes in the same pixel area to be turned on.

[0023] Optionally, the array substrate includes a display area and a non-display area. The display area includes a first temperature region and a second temperature region. Multiple pixel regions are disposed in the first temperature region and multiple pixel regions are disposed in the second temperature region. The number of sub-common electrodes in a single pixel region in the first temperature region is greater than the number of sub-common electrodes in a single pixel region in the second temperature region.

[0024] The step of obtaining the temperature on the array substrate includes:

[0025] Obtain the first average temperature of the first temperature region and the second average temperature of the second temperature region;

[0026] The step of the control module controlling a preset number of sub-common electrodes within the same pixel area to conduct when the temperature reaches a preset temperature includes:

[0027] When the first average temperature reaches a preset temperature, the control module controls a preset number of sub-common electrodes in the same pixel region within the first temperature region to be turned on; when the second average temperature reaches a preset temperature, the control module controls a preset number of sub-common electrodes in the same pixel region within the second temperature region to be turned on.

[0028] This application also discloses an electronic paper display panel, which includes an electronic paper film, a temperature acquisition module, and an array substrate. The electronic paper film is attached to the array substrate, and the array substrate drives the electronic paper film to display an image. The temperature acquisition module detects the temperature on the array substrate.

[0029] Compared to existing array substrate solutions, this application divides the common electrode within a pixel region into multiple sub-common electrodes. The control module selects the number of sub-common electrodes connected in the same pixel region based on the temperature on the array substrate, thereby adjusting the actual voltage of the pixel electrode to avoid blurring of the electronic paper display panel under high or low temperature conditions. Attached Figure Description

[0030] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0031] Figure 1 is a schematic diagram of an electronic paper display panel according to an embodiment of this application;

[0032] Figure 2 is a cross-sectional schematic diagram of an electronic paper display panel according to an embodiment of this application;

[0033] Figure 3 is a schematic diagram of an array substrate according to the first embodiment of this application;

[0034] Figure 4 is a cross-sectional schematic diagram of an array substrate according to the first embodiment of this application;

[0035] Figure 5 is a schematic diagram of a control module according to the first embodiment of this application;

[0036] Figure 6 is an enlarged schematic diagram of a control module including three control switch groups according to the first embodiment of this application;

[0037] Figure 7 is a schematic diagram of a display partition according to the first embodiment of this application;

[0038] Figure 8 is an enlarged schematic diagram of a control module comprising five control switch groups according to the first embodiment of this application;

[0039] Figure 9 is an enlarged schematic diagram of a control module according to a second embodiment of this application;

[0040] Figure 10 is a schematic diagram of a driving method for an array substrate according to an embodiment of this application. Detailed Implementation

[0041] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0042] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0043] Figure 1 is a schematic diagram of an electronic paper display panel according to an embodiment of this application, and Figure 2 is a cross-sectional schematic diagram of an electronic paper display panel according to an embodiment of this application. As shown in Figures 1 and 2, this application discloses an electronic paper display panel 10, which includes an electronic paper film 21, a temperature acquisition module 24, and an array substrate 100. The electronic paper film 21 is attached to the array substrate 100, and the array substrate 100 drives the electronic paper film 21 to display an image. The temperature acquisition module 24 detects the temperature on the array substrate 100.

[0044] The temperature acquisition module 24 can be located inside or outside the array substrate 100, and there is no limitation on this.

[0045] The electronic paper film 21 includes an electrophoretic layer 22 and a common electrode layer 23. The common electrode layer 23 is disposed on the side of the electrophoretic layer 22 away from the array substrate 100. An electric field is formed between the common electrode layer 23 and the pixel electrode 261 to drive the electrophoretic particles in the electrophoretic layer 22 to move.

[0046] This application also discloses an array substrate 100, which can be used in the electronic paper display panel 10 described above. Regarding the array substrate 100, this application provides the following design, which is specifically described through several embodiments:

[0047] Example 1:

[0048] Figure 3 is a schematic diagram of an array substrate according to the first embodiment of this application, and Figure 4 is a cross-sectional schematic diagram of an array substrate according to the first embodiment of this application. As shown in Figures 3 and 4, this application discloses an array substrate 100, which is used in an electronic paper display panel 10.

[0049] The array substrate 100 includes a substrate 200, data lines 310, scan lines 320, and pixel electrodes 261. The data lines 310 and scan lines 320 are both disposed on the substrate 200, and the data lines 310 and scan lines 320 intersect to define multiple pixel regions 330. The pixel electrodes 261 are disposed on the substrate 200, and each pixel electrode 261 corresponds one-to-one with each pixel region 330; simply put, a pixel electrode 261 is disposed in each pixel region 330.

[0050] The array substrate 100 further includes a common electrode sheet 400, which is disposed on the substrate 200. Each common electrode sheet 400 corresponds one-to-one with each pixel region 330. One common electrode sheet 400 includes multiple sub-common electrodes 410, and the orthographic projection of the pixel electrode 261 covers the orthographic projection of multiple sub-common electrodes 410 within the same pixel region 330. In simple terms, multiple sub-common electrodes 410 are disposed within a pixel region 330.

[0051] The array substrate 100 also includes a control module 600, which is disposed on the substrate 200. The control module 600 can select the number of sub-common electrodes 410 connected in the same pixel region 330 according to the temperature on the array substrate 100.

[0052] Since the electronic paper display panel 10 drives the electrophoretic particles in the electrophoretic layer 22 to move through the electric field formed between the pixel electrode 261 and the common electrode layer 23, and the activity of the electrophoretic particles will have different movement performance at extreme temperatures, that is, the activity of the electrophoretic particles is higher in high temperature environment and lower in low temperature environment, the electronic paper display panel 10 will exhibit a blurry image at high or low temperatures.

[0053] The pixel electrode 261 is connected to the data line 310 via an active switch. When the data line 310 charges the pixel electrode 261 with the same voltage, since the charging capacity of the active switch is fixed, the more sub-common electrodes 410 connected within the pixel region 330, the lower the actual voltage of the pixel electrode 261; conversely, the fewer sub-common electrodes 410 connected within the pixel region 330, the higher the actual voltage of the pixel electrode 261. Therefore, the actual voltage value of the pixel electrode 261 can be adjusted by changing the number of sub-common electrodes 410 connected within a single pixel region 330.

[0054] This application divides the common electrode within a pixel region 330 into multiple sub-common electrodes 410. The control module 600 selects the number of sub-common electrodes 410 connected in the same pixel region 330 according to the temperature on the array substrate 100, thereby adjusting the actual voltage of the pixel electrode 261 to avoid the problem of display blurring in the electronic paper display panel 10 under high or low temperature conditions.

[0055] For example, when the array substrate 100 is at a high temperature, more sub-common electrodes 410 within the same pixel region 330 are connected, thereby reducing the actual voltage of the pixel electrode 261 within that pixel region 330. This prevents the displacement of electrophoretic particles in the electronic paper display panel 10 from being affected by the electric field within the adjacent pixel region 330 at high temperatures. When the array substrate 100 is at a low temperature, fewer sub-common electrodes 410 within the same pixel region 330 are connected, thereby increasing the actual voltage of the pixel electrode 261 within that pixel region 330. This prevents the displacement of electrophoretic particles in the electronic paper display panel 10 from failing to reach the target position at low temperatures, thus preventing the electronic paper display panel 10 from displaying blurry images at both high and low temperatures. Compared to adjusting the output voltage of the data line 310, the solution in this application does not require modification of the driver chip. The control module 600 is directly placed on the substrate 200, which can reduce the cost of the driver chip and thus improve product competitiveness.

[0056] For example, the explanation is given by taking the example that the number of sub-common electrodes 410 in each pixel region 330 on the array substrate 100 is three. Since the number of sub-common electrodes 410 is only set to three, it is possible to set a temperature greater than 40°C as high temperature, a temperature less than 0°C as low temperature, and a temperature between 0°C and 40°C as normal temperature.

[0057] Specifically, the number of sub-common electrodes 410 includes three, defined as the first sub-common electrode 411, the second sub-common electrode 412, and the third sub-common electrode 413. When the temperature of the array substrate 100 is greater than 40°C, the first sub-common electrode 411, the second sub-common electrode 412, and the third sub-common electrode 413 within the same pixel region 330 are simultaneously connected, and the actual voltage of the pixel electrode 261 will decrease, thereby balancing the movement distance of highly active particles in a high-temperature environment. When the temperature of the array substrate 100 is between 0 and 40°C, the first sub-common electrode 411 and the second sub-common electrode 412 within the same pixel region 330 are simultaneously connected. When the temperature of the array substrate 100 is less than 0°C, the first sub-common electrode 411 within the same pixel region 330 is connected, and the actual voltage of the pixel electrode 261 will increase, thereby balancing the movement distance of low-activity particles in a low-temperature environment.

[0058] Furthermore, the area of ​​the first sub-common electrode 411 can be set to be larger than the area of ​​the second sub-common electrode 412, and the area of ​​the second sub-common electrode 412 can be larger than the area of ​​the third sub-common electrode 413. In this way, in low-temperature environments, the area of ​​the first sub-common electrode 411 is large enough to ensure that particles can move to the target position.

[0059] As shown in FIG4, the array substrate 100 further includes a first metal layer 210, a first insulating layer 220, a second metal layer 230, a second insulating layer 240, a passivation layer 250 and a pixel electrode layer 260 sequentially formed on the substrate 200.

[0060] This application takes the example of the scan line 320 being located in the first metal layer 210 and the data line 310 being located in the second metal layer 230. The pixel electrode 261 is located in the pixel electrode layer 260, and the sub-common electrode 410 can be located in the first metal layer 210 or the second metal layer 230. No limitation is made here.

[0061] Figure 5 is a schematic diagram of a control module according to the first embodiment of this application, and Figure 6 is an enlarged schematic diagram of a control module according to the first embodiment of this application including three control switch groups. As shown in Figures 5 and 6, this embodiment controls the connection of the three sub-common electrodes 410 in each pixel region 330 by setting a first control switch group 611, a second control switch group 612 and a third control switch group 613, as well as a first control line 631, a second control line 632 and a third control line 633.

[0062] The array substrate 100 further includes a first common electrode trace 511, a second common electrode trace 512, and a third common electrode trace 513, all of which are disposed on the substrate 200. The first common electrode trace 511 is connected to the first sub-common electrode 411, the second common electrode trace 512 is connected to the second sub-common electrode 412, and the third common electrode trace 513 is connected to the third common electrode. The first common electrode trace 511 is used to receive external common electrode signals, the second common electrode trace 512 is used to receive external common electrode signals, and the third common electrode trace 513 is used to receive external common electrode signals. The common electrode signals enter through the input terminal 710 of the control module 600.

[0063] For example, the sub-common electrode 410 is located in the first metal layer 210, the first common electrode trace 511 is located in the second metal layer 230, and the second common electrode trace 512 and the third common electrode trace 513 are located in the first metal layer 210.

[0064] The control module 600 includes a first control switch group 611, a second control switch group 612, and a third control switch group 613. The first control switch group 611 is located at the input end of the first common electrode trace 511, i.e., connected to the end of the first common electrode trace 511 away from the first sub-common electrode 411. The second control switch group 612 is located at the input end of the second common electrode trace 512, i.e. connected to the end of the second common electrode trace 512 away from the second sub-common electrode 412. The third control switch group 613 is located at the input end of the third common electrode trace 513, i.e. connected to the end of the third common electrode trace 513 away from the third sub-common electrode 413.

[0065] The first control switch group 611 includes three sub-active switches 620 connected in parallel, which are defined as the first sub-active switch 621, the second sub-active switch 622, and the third sub-active switch 623, respectively; the second control switch group 612 includes two sub-active switches 620 connected in parallel, which are defined as the fourth sub-active switch 624 and the fifth sub-active switch 625, respectively; the third control switch group 613 includes three sub-active switches 620 connected in parallel, which are defined as the sixth sub-active switch 626.

[0066] The control module 600 further includes a first control line 631, a second control line 632, and a third control line 633. The first control line 631 is connected to the first sub-active switch 621, the fourth sub-active switch 624, and the sixth sub-active switch 626, and can be used to simultaneously control the on / off state of the first common electrode line 511, the second common electrode line 512, and the third common electrode line 513.

[0067] In simple terms, the first control line 631 is connected to the gates of the first sub-active switch 621, the fourth sub-active switch 624, and the sixth sub-active switch 626. The first control line 631 outputs a switching signal to turn the first sub-active switch 621, the fourth sub-active switch 624, and the sixth sub-active switch 626 on and off, so that the external common signal can be output to the first sub-common electrode 411, the second sub-common electrode 412, and the third sub-common electrode 413 along the first common electrode line 511, the second common electrode line 512, and the third common electrode line 513.

[0068] The second control line 632 is connected to both the third sub-active switch 623 and the fifth sub-active switch 620, and can be used to simultaneously control the on / off state of the first common electrode line 511 and the second common electrode line 512.

[0069] In simple terms, the second control line 632 is connected to the gates of the third sub-active switch 623 and the fifth sub-active switch 620. The second control line 632 outputs a switching signal to turn the third sub-active switch 623 and the fifth sub-active switch 620 on and off, so that the external common signal can be output to the first sub-common electrode 411 and the second sub-common electrode 412 along the first common electrode line 511 and the second common electrode line 512.

[0070] The third control line 633 is only connected to the second sub-active switch 622 and can be used to control the on / off state of the first common electrode line 511.

[0071] In simple terms, the third control line 633 is only connected to the gate of the second sub-active switch 622. The second sub-active switch 622 can be turned on and off by outputting a switch signal through the third control line 633, so that the external common signal can be output to the first sub-common electrode 411 along the first common electrode line 511.

[0072] Of course, the number of sub-common electrodes 410 can be increased, and the temperature can be further divided. For example, if there are 6 sub-common electrodes 410, then the temperature range can be set as follows: less than 0℃ is the first temperature range, 0-10℃ is the second temperature range, 10-20℃ is the third temperature range, 20-30℃ is the fourth temperature range, 30-40℃ is the fifth temperature range, and greater than 40℃ is the sixth temperature range.

[0073] At this time, it is possible to select the following: when the array substrate 100 is in the first temperature range, only one of the sub-common electrodes 410 is connected; when the array substrate 100 is in the second temperature range, only two of the sub-common electrodes 410 are connected; when the array substrate 100 is in the third temperature range, only three of the sub-common electrodes 410 are connected; when the array substrate 100 is in the fourth temperature range, only four of the sub-common electrodes 410 are connected; when the array substrate 100 is in the fifth temperature range, only five of the sub-common electrodes 410 are connected; and when the array substrate 100 is in the sixth temperature range, only six of the sub-common electrodes 410 are connected.

[0074] Of course, the temperature range and the number of sub-electrodes 410 can be further divided, and the division methods should all fall within the protection scope of this application, which will not be elaborated again.

[0075] Since the temperature is different at different locations on the array substrate 100, especially in large-size electronic paper display panels 10, this application also makes different designs for the sub-common electrodes 410 in different regions.

[0076] Figure 7 is a schematic diagram of a display area according to the first embodiment of this application, and Figure 8 is an enlarged schematic diagram of a control module including five control switch groups according to the first embodiment of this application. As shown in Figures 7 and 8, the number of sub-common electrodes 410 in the pixel area 330 in different areas on the array substrate 100 is different as an example.

[0077] The array substrate 100 includes a display area 110 and a non-display area 120. The display area 110 can be divided into two regions, namely, the display area 110 includes a first temperature region 111 and a second temperature region 113. The first temperature region 111 is provided with a plurality of pixel regions 330, and the second temperature region 113 is provided with a plurality of pixel regions 330.

[0078] The number of sub-common electrodes 410 within a single pixel region 330 in the first temperature region 111 is greater than the number of sub-common electrodes 410 within a single pixel region 330 in the second temperature region 113. The area of ​​each sub-common electrode 410 may be equal.

[0079] For example, when the driver chip of the electronic paper display panel 10 is located on the driver chip connection terminal 720 of the non-display area 120 on the array substrate 100, the temperature of the display area 110 near the driver chip will be higher than that far from the driver chip. That is, the array substrate 100 also includes the driver chip connection terminal 720, which is located in the non-display area 120, and the second temperature region 113 is located on the side of the first temperature region 111 away from the driver chip connection terminal 720.

[0080] When the control module 600 performs control, it can control the number of connected sub-common electrodes 410 in the same pixel area 330 of the first temperature region 111 to be greater than the number of connected sub-common electrodes 410 in the same pixel area 330 of the second temperature region 113, thereby achieving precise control in different areas of the array substrate 100.

[0081] Furthermore, the display area 110 also includes a transition area 112, which is located between the first temperature area 111 and the second temperature area 113. The number of sub-common electrodes 410 in a single pixel area 330 within the first temperature area 111 is greater than the number of sub-common electrodes 410 in a single pixel area 330 within the transition area 112, and the number of sub-common electrodes 410 in a single pixel area 330 within the transition area 112 is greater than the number of sub-common electrodes 410 in a single pixel area 330 within the second temperature area 113. For example, the number of sub-common electrodes 410 in a single pixel region 330 within the first temperature region 111 is 5, namely the first sub-common electrode 411, the second sub-common electrode 412, the third sub-common electrode 413, the fourth sub-common electrode 414, and the fifth sub-common electrode 415; the number of sub-common electrodes 410 in a single pixel region 330 within the transition region 112 is 4, namely the first sub-common electrode 411, the second sub-common electrode 412, the third sub-common electrode 413, and the fourth sub-common electrode 414; and the number of sub-common electrodes 410 in a single pixel region 330 within the second temperature region 113 is 3, namely the first sub-common electrode 411, the second sub-common electrode 412, and the third sub-common electrode 413.

[0082] The fourth sub-common electrode 414 and the fifth sub-common electrode 415 can be understood as backup sub-common electrodes 410, which are controlled only when the temperature difference between the first temperature region 111, the transition region 112 and the second temperature region 113 is large.

[0083] Therefore, this application only needs to add a fourth control switch group 614, a fifth control switch group 615, a fourth control line 634, a fifth control line 635, a fourth common electrode trace 514, and a fifth common electrode trace 515 on the original basis.

[0084] The fourth control switch group 614 is disposed at the input end of the fourth common electrode trace 514, and the fifth control switch group 615 is disposed at the input end of the fifth common electrode trace 515. The fourth control switch group 614 includes a seventh sub-active switch 627 and an eighth sub-active switch 628 connected in parallel, and the fifth control switch group 615 includes a ninth sub-active switch 629. The fourth control line 634 is connected to both the seventh sub-active switch 627 and the ninth sub-active switch 629, and can be used to simultaneously control the on / off state of the fourth common electrode trace 514 and the fifth common electrode trace 515. The fifth control line 635 is connected to the eighth sub-active switch 628, and can be used to control the on / off state of the fourth common electrode trace 515.

[0085] In simple terms, when the seventh sub-active switch 627 and the ninth sub-active switch 629 are opened using only the fourth control line 634, the fourth sub-common electrode 414 and the fifth sub-common electrode 415 in the first temperature region 111, as well as the fourth sub-common electrode 414 in the transition region 112, will all be connected simultaneously; when the eighth sub-active switch 628 is opened using only the fifth control line 635, the fourth sub-common electrode 414 in the first temperature region 111 and the fourth sub-common electrode 414 in the transition region 112 will all be connected simultaneously.

[0086] This allows for external control of the first temperature region 111 and the transition region 112 when the temperature difference between the first temperature region 111, the transition region 112 and the second temperature region 113 is large, thus achieving a more precise temperature replenishment method.

[0087] Example 2:

[0088] Figure 9 is an enlarged schematic diagram of a control module according to the second embodiment of this application. As shown in Figure 9, unlike the first embodiment, this embodiment also includes a controllable resistor 524, and this embodiment only sets two control lines, a first control line 631 and a third control line 633.

[0089] Specifically, the array substrate 100 further includes a first common electrode trace 511, a second common electrode trace 512, and a third common electrode trace 513, all of which are disposed on the substrate 200. The first common electrode trace 511 is connected to the first sub-common electrode 411, the second common electrode trace 512 is connected to the second sub-common electrode 412, and the third common electrode trace 513 is connected to the third common electrode. The first common electrode trace 511 is used to receive external common electrode signals, the second common electrode trace 512 is used to receive external common electrode signals, and the third common electrode trace 513 is used to receive external common electrode signals. The control module 600 includes a sixth control switch group 616, a seventh control switch group 617, and an eighth control switch group 618. The sixth control switch group 616 is located at the input end of the first common electrode trace 511, the seventh control switch group 617 is located at the input end of the second common electrode trace 512, and the eighth control switch group 618 is located at the input end of the third common electrode trace 513. The sixth control switch group 616 includes two parallel sub-active switches 620, the seventh control switch group 617 includes one sub-active switch 620, and the eighth control switch group 618 includes one sub-active switch 620.

[0090] The control module 600 further includes a first resistor 521, a second resistor 522, a third resistor 523, and a controllable resistor 524. The resistance values ​​of the first resistor 521 and the second resistor 522 are equal, and the resistance value of the third resistor 523 is less than that of the first resistor 521. The first resistor 521 is disposed on the first common electrode trace 511 and located on the side of the sixth control switch group 616 away from the first sub-common electrode 411. The second resistor 522 is disposed on the second common electrode trace 512 and located on the side of the seventh control switch group 617 away from the second sub-common electrode 412. The third resistor 523 and the controllable resistor 524 are connected in series on the third common electrode trace 513 and located on the side of the eighth control switch group 618 away from the third sub-common electrode 413. The controllable resistor 524 can make the sum of the resistances of the third resistor 523 and the controllable resistor 524 greater than or equal to the resistance value of the first resistor 521.

[0091] The controllable resistor 524 includes an NTC photoresistor, and the sum of the resistance of the controllable resistor 524 and the resistance of the third resistor 523 can be greater than or equal to the resistance of the first resistor 521. Alternatively, the controllable resistor 524 can be a MOSFET, and the on-resistance of the MOSFET can be changed by controlling the input signal at the control terminal to achieve the function of variable resistance of the controllable resistor 524. The control module 600 also includes a first control line 631 and a third control line 633. The first control line 631 is connected to a sub-active switch 620 in the sixth control switch group 616, a sub-active switch 620 in the seventh control switch group 617, and a sub-active switch 620 in the eighth control switch group 618, and can be used to control the on / off state of the first common electrode trace 511, the second common electrode trace 512, and the third common electrode trace 513. The third control line 633 is only connected to another sub-active switch 620 in the sixth control switch group 616 and can be used to control the on / off state of the first common electrode trace 511. For example, the explanation is given by taking the example that the number of sub-common electrodes 410 in each pixel region 330 on the array substrate 100 is three. Since the number of sub-common electrodes 410 is only set to three, it is possible to set a temperature greater than 40°C as high temperature, a temperature less than 0°C as low temperature, and a temperature between 0°C and 40°C as normal temperature.

[0092] Specifically, the number of sub-common electrodes 410 includes three, which are respectively defined as the first sub-common electrode 411, the second sub-common electrode 412 and the third sub-common electrode 413.

[0093] When the temperature of the array substrate 100 is greater than 40°C, the sum of the resistance of the controllable resistor 524 and the resistance of the third resistor 523 is equal to the resistance of the first resistor 521. The first control line 631 controls one sub-active switch 620 in the sixth control switch group 616, the sub-active switch 620 in the seventh control switch group 617, and the sub-active switch 620 in the eighth control switch group 618 to open. The first common electrode trace 511, the second common electrode trace 512, and the third common electrode trace 513 are simultaneously turned on. The first sub-common electrode 411, the second sub-common electrode 412, and the third sub-common electrode 413 in the same pixel area 330 are simultaneously connected. The actual voltage of the pixel electrode 261 will decrease, thereby balancing the distance of highly active particles moving in a high-temperature environment. When the temperature of the array substrate 100 is between 0-40℃, the sum of the resistance of the controllable resistor 524 and the resistance of the third resistor 523 is greater than that of the first resistor 521. Although the first control line 631 turns on one sub-active switch 620 in the sixth control switch group 616, the sub-active switch 620 in the seventh control switch group 617, and the sub-active switch 620 in the eighth control switch group 618, only the first common electrode trace 511 and the second common electrode trace 512 are simultaneously connected. The first sub-common electrode 411 and the second sub-common electrode 412 in the same pixel area 330 are simultaneously connected.

[0094] When the temperature of the array substrate 100 is less than 0°C, the third control line 633 controls another sub-active switch 620 in the sixth control switch group 616 to open, the first common electrode trace 511 is turned on, the first sub-common electrode 411 in the same pixel area 330 is connected, and the actual voltage of the pixel electrode 261 will increase, thereby balancing the distance of low-activity particles in the low-temperature environment.

[0095] Figure 10 is a schematic diagram of a driving method for an array substrate according to an embodiment of this application. As shown in Figure 10, this application also discloses a driving method for an array substrate, the driving method being used in the array substrate 100 described above, the driving method including the following steps:

[0096] S1: Obtain the temperature on the array substrate;

[0097] S2: When the temperature reaches the preset temperature, the control module controls the preset number of sub-common electrodes in the same pixel area to be turned on.

[0098] The device for acquiring the temperature on the array substrate 100 includes, for example, a temperature sensor. The temperature acquisition module 24 can be disposed on the array substrate 100 or disposed outside the array substrate 100.

[0099] The temperature data acquired by the temperature sensor is transmitted to the control module 600. The control module 600 then selects the number of sub-common electrodes 410 connected in the same pixel region 330 based on the temperature on the array substrate 100. This is to avoid display blurring issues in the electronic paper display panel 10 under high or low temperature conditions.

[0100] For example, when the array substrate 100 is at a high temperature, more sub-common electrodes 410 within the same pixel region 330 are connected, thereby reducing the actual voltage of the pixel electrode 261 within the pixel region 330, which can prevent the electronic paper display panel 10 from having a blurry display problem under high temperature conditions; when the array substrate 100 is at a low temperature, fewer sub-common electrodes 410 within the same pixel region 330 are connected, thereby reducing the actual voltage of the pixel electrode 261 within the pixel region 330, which can prevent the electronic paper display panel 10 from having a blurry display problem under low temperature conditions.

[0101] Furthermore, this application also divides the array substrate 100 into multiple temperature regions. Specifically, the array substrate 100 includes a display area 110 and a non-display area 120. The display area 110 includes a first temperature region 111 and a second temperature region 113. Multiple pixel regions 330 are disposed in the first temperature region 111, and multiple pixel regions 330 are disposed in the second temperature region 113. The number of sub-common electrodes 410 in a single pixel region 330 in the first temperature region 111 is greater than the number of sub-common electrodes 410 in a single pixel region 330 in the second temperature region 113.

[0102] S1: The steps for obtaining the temperature on the array substrate include:

[0103] S11: Obtain the first average temperature of the first temperature region and the second average temperature of the second temperature region;

[0104] S2: The step of the control module controlling a preset number of sub-common electrodes within the same pixel area to be turned on when the temperature reaches a preset temperature includes:

[0105] S21: When the first average temperature reaches a preset temperature, the control module controls a preset number of sub-common electrodes in the same pixel region within the first temperature region to be turned on; when the second average temperature reaches a preset temperature, the control module controls a preset number of sub-common electrodes in the same pixel region within the second temperature region to be turned on.

[0106] When the display area 110 further includes a transition area 112, the transition area 112 is located between the first temperature area 111 and the second temperature area 113, the number of sub-common electrodes 410 in a single pixel area 330 within the first temperature area 111 is greater than the number of sub-common electrodes 410 in a single pixel area 330 within the transition area 112, and the number of sub-common electrodes 410 in a single pixel area 330 within the transition area 112 is greater than the number of sub-common electrodes 410 in a single pixel area 330 within the second temperature area 113.

[0107] S1: The steps for obtaining the temperature on the array substrate include:

[0108] S12: Obtain the first average temperature of the first temperature region, obtain the second average temperature of the second temperature region, and obtain the third average temperature of the transition region;

[0109] S2: The step of the control module controlling a preset number of sub-common electrodes within the same pixel area to be turned on when the temperature reaches a preset temperature includes:

[0110] S22: When the first average temperature reaches a preset temperature, the control module controls a preset number of sub-common electrodes in the same pixel region within the first temperature region to be turned on; when the second average temperature reaches a preset temperature, the control module controls a preset number of sub-common electrodes in the same pixel region within the second temperature region to be turned on; when the third average temperature reaches a preset temperature, the control module controls a preset number of sub-common electrodes in the same pixel region within the transition region to be turned on.

[0111] Through the above control method, a precise compensation design can be made for the electronic paper display panel 10 when different temperatures occur at different locations. This method makes up for the shortcomings of changing the data voltage, which cannot address the large temperature differences in the pixel areas 330 at different locations along the length of the data line 310 and cannot be specifically compensated by voltage.

[0112] It should be noted that the limitations on each step involved in this solution are not considered as limiting the order of steps, provided that they do not affect the implementation of the specific solution. The steps listed first can be executed first, later, or even simultaneously. As long as this solution can be implemented, it should be considered to fall within the scope of protection of this application.

[0113] It should be noted that the inventive concept of this application can lead to numerous embodiments, but due to space limitations in the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. The combination of embodiments or technical features will enhance the original technical effect. The above description is a further detailed explanation of this application in conjunction with specific optional embodiments, and it should not be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered to fall within the protection scope of this application.

Claims

1. An array substrate for use in an electronic paper display panel, the array substrate comprising a substrate, data lines, scan lines and pixel electrodes, wherein the data lines and the scan lines are both disposed on the substrate and the data lines and the scan lines are crisscrossed to define a plurality of pixel regions, and the pixel electrodes are disposed on the substrate, and each pixel electrode corresponds one-to-one with each pixel region; The array substrate further includes a common electrode sheet, which is disposed on the substrate. Each common electrode sheet corresponds one-to-one with each pixel region. One common electrode sheet includes multiple sub-common electrodes, and the orthogonal projection of the pixel electrode in the same pixel region covers the orthogonal projection of multiple sub-common electrodes. The array substrate also includes a control module, which can select the number of sub-common electrodes connected in the same pixel region according to the temperature on the array substrate.

2. The array substrate according to claim 1, wherein, The number of sub-common electrodes includes three, which are defined as the first sub-common electrode, the second sub-common electrode, and the third sub-common electrode, respectively. The area of ​​the first sub-common electrode is larger than the area of ​​the second sub-common electrode, and the area of ​​the second sub-common electrode is larger than the area of ​​the third sub-common electrode.

3. The array substrate according to claim 2, wherein, The array substrate further includes a first common electrode trace, a second common electrode trace, and a third common electrode trace, all of which are disposed on the substrate. The first common electrode trace is connected to the first sub-common electrode, the second common electrode trace is connected to the second sub-common electrode, and the third common electrode trace is connected to the third common electrode; the first common electrode trace is used to receive external common electrode signals, the second common electrode trace is used to receive external common electrode signals, and the third common electrode trace is used to receive external common electrode signals. The control module includes a first control switch group, a second control switch group, and a third control switch group. The first control switch group is located at the input end of the first common electrode trace, the second control switch group is located at the input end of the second common electrode trace, and the third control switch group is located at the input end of the third common electrode trace. The first control switch group includes three sub-active switches, defined as the first sub-active switch, the second sub-active switch, and the third sub-active switch, respectively. The second control switch group includes two sub-active switches, defined as the fourth sub-active switch and the fifth active switch, respectively. The third control switch group includes three sub-active switches, defined as the sixth sub-active switch. The control module further includes a first control line, a second control line, and a third control line. The first control line is connected to the first sub-active switch, the fourth sub-active switch, and the sixth sub-active switch simultaneously, and can be used to simultaneously control the on / off state of the first common electrode trace, the second common electrode trace, and the third common electrode trace. The second control line is connected to the third sub-active switch and the fifth sub-active switch simultaneously, and can be used to simultaneously control the on / off state of the first common electrode trace and the second common electrode trace. The third control line is only connected to the second sub-active switch and can be used to control the on / off state of the first common electrode trace.

4. The array substrate according to claim 1, wherein, The array substrate includes a display area and a non-display area. The display area includes a first temperature region and a second temperature region. Multiple pixel regions are disposed in the first temperature region and the second temperature region. The number of sub-common electrodes in a single pixel region within the first temperature region is greater than the number of sub-common electrodes in a single pixel region within the second temperature region.

5. The array substrate according to claim 4, wherein, Each of the sub-common electrodes has an equal area.

6. The array substrate according to claim 4, wherein, The display area further includes a transition region located between the first temperature region and the second temperature region. The number of sub-common electrodes in a single pixel region within the first temperature region is greater than the number of sub-common electrodes in a single pixel region within the transition region, and the number of sub-common electrodes in a single pixel region within the transition region is greater than the number of sub-common electrodes in a single pixel region within the second temperature region.

7. The array substrate according to claim 6, wherein, The number of sub-common electrodes in a single pixel region within the first temperature region is 5, namely the first sub-common electrode, the second sub-common electrode, the third sub-common electrode, the fourth sub-common electrode, and the fifth sub-common electrode. The number of sub-common electrodes in a single pixel region within the transition region is 4, namely the first sub-common electrode, the second sub-common electrode, the third sub-common electrode, and the fourth sub-common electrode. The number of sub-common electrodes in a single pixel region within the second temperature region is 3, namely the first sub-common electrode, the second sub-common electrode, and the third sub-common electrode.

8. The array substrate according to claim 7, wherein, The array substrate further includes a fourth control switch group, a fifth control switch group, a fourth control line, a fifth control line, a fourth common electrode trace, and a fifth common electrode trace; The fourth control switch group is located at the input end of the fourth common electrode trace, the fifth control switch group is located at the input end of the fifth common electrode trace, the fourth control switch group includes a seventh sub-active switch and an eighth sub-active switch connected in parallel, and the fifth control switch group includes a ninth sub-active switch; The fourth control line is connected to both the seventh and ninth sub-active switches and can be used to simultaneously control the on / off state of the fourth common electrode trace and the fifth common electrode trace. The fifth control line is connected to the eighth sub-active switch and can be used to control the on / off state of the fourth common electrode trace.

9. The array substrate according to claim 6, wherein, The array substrate also includes a driver chip connection terminal, which is located in the non-display area, and the second temperature region is located on the side of the first temperature region away from the driver chip connection terminal.

10. The array substrate according to claim 2, wherein, The array substrate further includes a first common electrode trace, a second common electrode trace, and a third common electrode trace, all of which are disposed on the substrate. The first common electrode trace is connected to a first sub-common electrode, the second common electrode trace is connected to a second sub-common electrode, and the third common electrode trace is connected to a third common electrode. The first common electrode trace is used to receive an external common electrode signal, the second common electrode trace is used to receive an external common electrode signal, and the third common electrode trace is used to receive an external common electrode signal. The control module includes a sixth control switch group, a seventh control switch group, and an eighth control switch group. The sixth control switch group is located at the input end of the first common electrode trace, the seventh control switch group is located at the input end of the second common electrode trace, and the eighth control switch group is located at the input end of the third common electrode trace. The sixth control switch group includes two sub-active switches, the seventh control switch group includes one sub-active switch, and the eighth control switch group includes one sub-active switch. The control module further includes a first resistor, a second resistor, a third resistor, and a controllable resistor. The first resistor and the second resistor have equal resistance values, and the third resistor has a resistance value less than the first resistor. The first resistor is disposed on the first common electrode trace and located on the side of the sixth control switch group away from the first sub-common electrode. The second resistor is disposed on the second common electrode trace and located on the side of the seventh control switch group away from the second sub-common electrode. The third resistor and the controllable resistor are connected in series on the third common electrode trace and located on the side of the eighth control switch group away from the third sub-common electrode. The controllable resistor can make the sum of the resistances of the third resistor and the controllable resistor greater than or equal to the resistance value of the first resistor. The control module further includes a first control line and a third control line. The first control line is connected to a sub-active switch in the sixth control switch group, a sub-active switch in the seventh control switch group, and a sub-active switch in the eighth control switch group. It can be used to control the on / off state of the first common electrode trace, the second common electrode trace, and the third common electrode trace. The third control line is only connected to another sub-active switch in the sixth control switch group. It can be used to control the on / off state of the first common electrode trace.

11. The array substrate according to claim 10, wherein, The controllable resistor includes an NTC photoresistor.

12. The array substrate according to claim 10, wherein, The sum of the resistance values ​​of the controllable resistor and the third resistor is greater than the resistance value of the first resistor.

13. The array substrate according to claim 10, wherein, The sum of the resistance values ​​of the controllable resistor and the third resistor is equal to the resistance value of the first resistor.

14. The array substrate according to claim 1, wherein, The scan line is located in the first metal layer, the data line is located in the second metal layer, the pixel electrode is located in the pixel electrode layer, and the sub-common electrode is located in the first metal layer.

15. The array substrate according to claim 1, wherein, The scan line is located in the first metal layer, the data line is located in the second metal layer, the pixel electrode is located in the pixel electrode layer, and the sub-common electrode is located in the second metal layer.

16. The array substrate according to claim 3, wherein, The scan line is located in the first metal layer, the data line is located in the second metal layer, the pixel electrode is located in the pixel electrode layer, and the sub-common electrode is located in the first metal layer; the first common electrode trace is located in the second metal layer, and the second common electrode trace and the third common electrode trace are located in the first metal layer.

17. A driving method for an array substrate, wherein, The driving method is used on the array substrate according to any one of claims 1-16, and the driving method includes the following steps: The temperature on the array substrate is obtained; When the temperature reaches the preset temperature, the control module controls the preset number of sub-common electrodes in the same pixel area to be turned on.

18. The driving method for an array substrate according to claim 17, wherein, The array substrate includes a display area and a non-display area. The display area includes a first temperature region and a second temperature region. Multiple pixel regions are disposed in the first temperature region and multiple pixel regions are disposed in the second temperature region. The number of sub-common electrodes in a single pixel region in the first temperature region is greater than the number of sub-common electrodes in a single pixel region in the second temperature region. The step of obtaining the temperature on the array substrate includes: Obtain the first average temperature of the first temperature region and the second average temperature of the second temperature region; The step of the control module controlling a preset number of sub-common electrodes within the same pixel area to conduct when the temperature reaches a preset temperature includes: When the first average temperature reaches a preset temperature, the control module controls a preset number of sub-common electrodes in the same pixel region within the first temperature region to be turned on; when the second average temperature reaches a preset temperature, the control module controls a preset number of sub-common electrodes in the same pixel region within the second temperature region to be turned on.

19. An electronic paper display panel, wherein, The electronic paper display panel includes an electronic paper film, a temperature acquisition module, and an array substrate as described in any one of claims 1-16. The electronic paper film is attached to the array substrate, the array substrate drives the electronic paper film to display an image, and the temperature acquisition module detects the temperature on the array substrate.

20. The electronic paper display panel according to claim 19, wherein, The electronic paper film includes an electrophoretic layer and a common electrode layer. The common electrode layer is disposed on the side of the electrophoretic layer away from the array substrate. An electric field is formed between the common electrode layer and the pixel electrode to drive the electrophoretic particles in the electrophoretic layer to move.

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