Array substrate, display panel and display device

Abstract

The application discloses an array substrate, a display panel and a display device, and mainly relates to the technical field of display. The array substrate comprises a substrate, a first heating layer, an active switch layer and a pixel electrode layer. The first heating layer and the active switch layer are arranged on the substrate. The pixel electrode layer is located on the side of the active switch layer away from the substrate. The first heating layer comprises a first control electrode and a first heating main body. The first control electrode is connected with the first heating main body. The first control electrode is used for transmitting current to the first heating main body. The material of the first heating main body comprises carbon black material. The active switch layer comprises a plurality of first active switches. The array substrate further comprises a plurality of first light shielding structures. The first light shielding structures are located between the active switch layer and the first heating layer. The orthographic projection of the first light shielding structures on the substrate covers the orthographic projection of the first active switches on the substrate. Through the above design, the temperature uniformity of the display panel is improved, and the display effect of the display panel is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to an array substrate, a display panel, and a display device. Background Technology

[0002] Electronic paper technology is widely used in e-book readers, electronic tags, smart wearables and other fields. In recent years, with the continuous evolution of electronic paper technology, its application scenarios have continued to expand.

[0003] In electronic paper technology, the display relies on the movement of electrophoretic particles under the influence of an electric field to display content. At low temperatures, the viscosity of the electrophoretic solution increases, the particle migration speed slows down, and the particles cannot move to the target position normally, resulting in poor display quality of the display panel. Summary of the Invention

[0004] The purpose of this application is to provide an array substrate, a display panel, and a display device to improve the temperature uniformity of the display panel and enhance its display effect.

[0005] This application discloses an array substrate, which includes a substrate, a first heating layer, an active switching layer, and a pixel electrode layer. The first heating layer and the active switching layer are both disposed on the substrate. The pixel electrode layer is located on the side of the active switching layer away from the substrate. The first heating layer includes a first control electrode and a first heating body. The first control electrode is connected to the first heating body and is used to transmit current to the first heating body. The material of the first heating body includes carbon black material.

[0006] The active switching layer includes a plurality of first active switches, and the array substrate also includes a plurality of first light-shielding structures. The first light-shielding structures are located between the active switching layer and the first heating layer, and the orthogonal projection of the first light-shielding structures on the substrate covers the orthogonal projection of the first active switches on the substrate.

[0007] Optionally, the first heating layer is located on the side of the substrate opposite to the active switching layer.

[0008] Optionally, the array substrate further includes a sub-pixel electrode, a common electrode, a second active switch, and a control line. The sub-pixel electrode and the common electrode are both disposed on the substrate, and the common electrode is located between the sub-pixel electrode and the pixel electrode. The orthogonal projection of the sub-pixel electrode on the substrate covers the orthogonal projection of the common electrode on the substrate. The sub-pixel electrode and the pixel electrode are respectively connected to the source and drain of the second active switch, and the control line is connected to the gate of the second active switch.

[0009] Optionally, the active switching layer includes a first metal layer, a first insulating layer, a second metal layer, and a second insulating layer, wherein the first metal layer, the first insulating layer, the second metal layer, and the second insulating layer are sequentially disposed on the substrate;

[0010] The first light-shielding structure includes a bottom light-shielding portion and a side light-shielding portion. The side light-shielding portion is connected to the edge of the bottom light-shielding portion. The bottom light-shielding portion is located between the substrate and the first metal layer. The side light-shielding portion penetrates at least the first insulating layer.

[0011] This application also discloses a display panel, which includes an electrophoretic layer, a common electrode layer, a protective layer, and an array substrate. The electrophoretic layer is disposed on the side of the pixel electrode layer opposite to the substrate, the common electrode layer is disposed on the side of the electrophoretic layer opposite to the pixel electrode layer, and the protective layer is disposed on the side of the common electrode layer opposite to the electrophoretic layer.

[0012] Optionally, the display panel includes a pixel unit area, and the display panel further includes a color resist layer, the color resist layer including a plurality of sub-color resists, the plurality of sub-color resists being arranged in a matrix;

[0013] The display panel further includes a second heating layer located between the color resist layer and the protective layer. The second heating layer includes a second control electrode and a second heating body. The second control electrode is connected to the second heating body and is used to transmit current to the second heating body. The material of the second heating body includes carbon black material. The second heating body is mesh-like and covers the space between two adjacent sub-color resists.

[0014] Optionally, a groove is provided on the color resist layer, the groove being located between two adjacent sub-color resists, and the second heating element is located within the groove.

[0015] Optionally, the second heating layer further includes a third heating body, wherein the second heating body, which is arranged in a mesh, defines multiple grids, the third heating body is located within the grids, and the third heating body is connected to the second heating body. The second control electrode is also used to transmit current to the third heating body, and the material of the third heating body includes light-transmitting graphene material.

[0016] Optionally, the display panel includes a first control circuit and a second control circuit. The first control circuit is connected to the first control electrode, and the second control circuit is connected to the second control electrode. The first control circuit is used to adjust the current of the first control electrode, and the second control circuit is used to adjust the current of the second control electrode.

[0017] This application also discloses a display device, which includes a driving circuit and a display panel, wherein the driving circuit and the display panel are connected.

[0018] Compared to existing array substrates that use metal layers for heating, this application provides a first heating layer on the substrate, with the first control electrode in the first heating layer connected to the first heating body. The first heating body is made of carbon black material, and the first control electrode transmits current to the first heating body, thereby driving the first heating body to heat up. This results in more uniform heating and avoids localized hot spots. Furthermore, by providing a first light-shielding structure between the first heating layer and the first active switch, the infrared radiation generated by the first heating layer can be prevented from directly hitting the first active switch, thus preventing display abnormalities and improving the display panel's display effect. Attached Figure Description

[0019] 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:

[0020] Figure 1 This is a schematic diagram of a display device according to an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of an array substrate according to an embodiment of the present application, in which the first heating layer and the active switching layer are located on opposite sides of the substrate.

[0022] Figure 3 This is a schematic diagram of an array substrate according to an embodiment of the present application, in which the first heating layer and the active switching layer are located on the same side of the substrate;

[0023] Figure 4 This is a schematic diagram of an array substrate according to an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of a sub-pixel electrode according to an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of a display panel according to an embodiment of this application;

[0026] Figure 7 This is a schematic diagram of a second heating layer according to an embodiment of this application;

[0027] Figure 8This is a schematic diagram of a second heating layer disposed on the color resist according to an embodiment of this application;

[0028] Figure 9 This is a schematic diagram of a first control circuit and a second control circuit according to an embodiment of this application.

[0029] Among them, 10 is a display device; 20 is a driving circuit; 31 is a first control circuit; 32 is a second control circuit; 40 is a display panel; 41 is a pixel unit area; 100 is a protective layer; 110 is a protective film; 112 is a PET film; 200 is a color resist layer; 210 is a sub-color resist; 220 is a groove; 300 is an electrophoretic layer; 400 is a common electrode layer; 500 is an array substrate; 511 is a substrate; 512 is a heating layer insulating layer; 513 is a first metal layer; 514 is a first insulating layer; 515 is a second metal layer; 516 is a second insulating layer; 520 is a first heating layer; 521 is a first control electrode; and 522 is a first heating body. ; 530, Second heating layer; 531, Second control electrode; 532, Second heating body; 533, Third heating body; 540, First light-shielding structure; 541, Bottom light-shielding part; 542, Side light-shielding part; 543, First side light-shielding part; 544, Second side light-shielding part; 550, Second light-shielding structure; 560, Active switch layer; 561, First active switch; 562, Second active switch; 563, Common electrode; 570, Pixel electrode layer; 571, Pixel electrode; 572, Sub-pixel electrode; 581, Data line; 582, Scan line; 583, Control line; 710, First annular through groove; 720, Second annular through groove. Detailed Implementation

[0030] 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.

[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0032] In addition, terms such as “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” that indicate orientation or positional relationship are based on the orientation or relative positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0035] Figure 1 This is a schematic diagram of a display device according to an embodiment of this application, as shown below. Figure 1 As shown, this application discloses a display device 10, which includes a driving circuit 20 and a display panel 40, wherein the driving circuit 20 and the display panel 40 are connected.

[0036] The driving circuit 20 is used to drive the display panel 40 to display the image.

[0037] This application also discloses an array substrate 500, which can be used in the display device 10 described above. Regarding the array substrate 500, this application provides the following design:

[0038] Figure 2 This is a schematic diagram of an array substrate according to an embodiment of this application, in which the first heating layer and the active switching layer are located on opposite sides of the substrate. Figure 3 This is a schematic diagram of an array substrate according to an embodiment of this application, in which the first heating layer and the active switching layer are located on the same side of the substrate, as shown. Figures 2-3As shown, this application discloses an array substrate 500, which includes a substrate 511, a first heating layer 520, an active switching layer 560, and a pixel electrode layer 570. The first heating layer 520 and the active switching layer 560 are both disposed on the substrate 511. The pixel electrode layer 570 is located on the side of the active switching layer 560 away from the substrate 511. The first heating layer 520 includes a first control electrode 521 and a first heating body 522. The first control electrode 521 is connected to the first heating body 522 and is used to transmit current to the first heating body 522. The material of the first heating body 522 includes carbon black material.

[0039] The active switching layer 560 includes a plurality of first active switches 561, and the array substrate 500 also includes a plurality of first light-shielding structures 540. The first light-shielding structures 540 are located between the active switching layer 560 and the first heating layer 520, and the orthographic projection of the first light-shielding structures 540 on the substrate 511 covers the orthographic projection of the first active switches 561 on the substrate 511. The pixel electrode layer 570 includes a plurality of pixel electrodes 571, and the first active switches 561 are connected to the pixel electrodes 571.

[0040] Since the first heating element 522 of the carbon black material heats up in a planar manner, it does not have the "hot spot" problem that occurs when heating a metal layer. Moreover, the first heating element 522 of the carbon black material emits infrared radiation when it is heated, and the heat has strong penetrability.

[0041] Compared to the existing array substrate 500 which uses a metal layer for heating, this application provides a first heating layer 520 on the substrate 511, with the first control electrode 521 in the first heating layer 520 connected to the first heating body 522. The material of the first heating body 522 includes carbon black. The first control electrode 521 transmits current to the first heating body 522, thereby driving the first heating body 522 to heat up. This results in more uniform heating and avoids local hot spots.

[0042] Furthermore, by setting a first light-shielding structure 540 between the first heating layer 520 and the first active switch 561, the infrared light radiation generated by the first heating layer 520 can be prevented from directly hitting the first active switch 561, thus avoiding display abnormalities and improving the display effect of the display panel 40.

[0043] The flexibility of the first heating element 522 is better than that of the metal layer. Therefore, when the array substrate 500 is used in the flexible display panel 40, it is less likely to crack or break, and the phenomenon of local failure to heat up is avoided.

[0044] During heating, if infrared radiation continuously irradiates the first active switch 561, it will affect the control accuracy of the pixel voltage of the pixel electrode 571 by the first active switch 561, resulting in color shift; it will also reduce the switching speed of the first active switch 561, causing image ghosting or motion blur. This application provides a first light-shielding structure 540 to block the infrared radiation, thus preventing the first active switch 561 from malfunctioning. The heating voltage of the first heating element 522 is between 3-24V, which has a relatively small impact on the array substrate 500.

[0045] See Figure 2 For example, the first heating layer 520 is located on the side of the substrate 511 opposite to the active switching layer 560. In other words, the first heating layer 520 and the active switching layer 560 are respectively disposed on opposite sides of the substrate 511, so that the material used to fabricate the first heating layer 520 will not affect the active switching layer 560.

[0046] See Figure 3 For example, the first heating layer 520 and the active switching layer 560 can be disposed on the same side of the substrate 511. In this case, a heating layer insulating layer 512 needs to be disposed between the first heating layer 520 and the active switching layer 560. Specifically:

[0047] The array substrate 500 further includes a heating layer insulating layer 512, the first heating layer 520 is disposed on the side of the substrate 511 near the active switching layer 560, and the heating layer insulating layer 512 is located between the active switching layer 560 and the first heating layer 520.

[0048] By placing the first heating layer 520 and the active switching layer 560 on the same side of the substrate 511, it is not necessary to flip the substrate 511 during fabrication, which reduces the fabrication process, lowers the fabrication difficulty, and improves the product yield.

[0049] Figure 4 This is a schematic diagram of an array substrate according to an embodiment of this application, as shown below. Figure 4 As shown, the active switching layer 560 includes a first metal layer 513, a first insulating layer 514, a second metal layer 515, and a second insulating layer 516, which are sequentially disposed on the substrate 511.

[0050] The first light-shielding structure 540 includes a bottom light-shielding portion 541 and a side light-shielding portion 542. The side light-shielding portion 542 is connected to the edge of the bottom light-shielding portion 541. The bottom light-shielding portion 541 is located between the substrate 511 and the first metal layer 513. The side light-shielding portion 542 at least penetrates the first insulating layer 514.

[0051] Furthermore, by providing a side shading part 542, the infrared radiation emitted by the first heating element 522, which is located outside the first active switch 561, is prevented from irradiating the area, thereby achieving a more comprehensive prevention of continuous high temperatures.

[0052] For example, the side light-shielding part 542 penetrates the first insulating layer 514, in other words, the side light-shielding part 542 is only located within the first insulating layer 514; of course, it is also possible that the side light-shielding part 542 penetrates both the first insulating layer 514 and the second insulating layer 516, in other words, the side light-shielding part 542 is provided in both the first insulating layer 514 and the second insulating layer 516.

[0053] When the side light-shielding portion 542 simultaneously penetrates the first insulating layer 514 and the second insulating layer 516, the side light-shielding portion 542 needs to be divided into two parts, namely the first side light-shielding portion 543 in the first insulating layer 514 and the second side light-shielding portion 544 in the second insulating layer 516.

[0054] During fabrication, a bottom light-shielding portion 541 is first formed on the substrate 511, then a first metal layer 513 is formed on the bottom light-shielding portion 541, then a first insulating layer 514 is formed on the first metal layer 513, then a first annular groove 710 is formed on the first insulating layer 514, and a first side light-shielding portion 543 is formed within the first annular groove 710, then a semiconductor layer and a second metal layer 515 are formed on the first insulating layer 514, then a second insulating layer 516 is formed on the second metal layer 515, then a second annular groove 720 is formed on the second insulating layer 516, and a second side light-shielding portion 544 is formed within the second annular groove 720.

[0055] The bottom light-shielding part 541 is made of an insulating light-shielding material, such as a black matrix material.

[0056] The first active switch 561 includes a gate, a semiconductor layer, a source, and a drain. When the first active switch 561 is a bottom-gate type first active switch 561, the gate is located in the first metal layer 513, the source and drain are located in the second metal layer 515, and the semiconductor layer is located between the second metal layer 515 and the first insulating layer 514.

[0057] When the first active switch 561 is a bottom-gate type first active switch 561, the gate is located in the second metal layer 515, the source and drain are located in the first metal layer 513, and the semiconductor layer is located between the first metal layer 513 and the first substrate 511.

[0058] For ease of explanation, this application takes the first active switch 561 as a dual-gate first active switch 561 as an example.

[0059] Furthermore, when the first active switch 561 is a top-gate active switch, the total area of ​​the source and drain of the first active switch 561 on the first metal layer 513 is greater than the total area of ​​the gate of the first active switch 561 on the second metal layer 515, and the area surrounded by the second annular through groove 720 is smaller than the area surrounded by the second annular through groove 720. In other words, the distance between the second annular through grooves 720 on the left and right sides of the gate of the first active switch 561 in the second metal layer 515 is smaller than the distance between the first annular through grooves 710 on the left and right sides of the source and drain of the first active switch 561 in the first metal layer 513. When the infrared light radiation emitted from the first heating body 522 propagates obliquely upward, since the second side light-shielding part 544 is equivalent to shrinking inward, the infrared light radiation that partially irradiates the first side light-shielding part 543 will not be blocked by the second side light-shielding part 544, but can propagate smoothly upward. This can prevent the entire first light-shielding structure 540 from blocking too much infrared light radiation.

[0060] Figure 5 This is a schematic diagram of a sub-pixel electrode according to an embodiment of this application, in conjunction with... Figure 4 and Figure 5 As shown, the active switching layer 560 also includes a common electrode 563, which is disposed within the second metal layer 515, thereby forming a storage capacitor between the common electrode 563 and the pixel electrode 571.

[0061] The array substrate 500 further includes a data line 581, a scan line 582, and a control line 583. The data line 581 is connected to the source of the first active switch 561, the scan line 582 is connected to the drain of the first active switch 561, and the pixel electrode 571 is connected to the drain of the first active switch 561.

[0062] The array substrate 500 further includes a sub-pixel electrode 572 and a second active switch 562. The sub-pixel electrode 572 and the common electrode 563 are both disposed on the substrate 511, and the common electrode 563 is located between the sub-pixel electrode 572 and the pixel electrode 571. Specifically, the sub-pixel electrode 572 is disposed on the first metal layer 513, and the common electrode 563 is disposed on the second metal layer 515. The orthogonal projection of the sub-pixel electrode 572 on the substrate 511 covers the orthogonal projection of the common electrode 563 on the substrate 511. The sub-pixel electrode 572 and the pixel electrode 571 are respectively connected to the source and drain of the second active switch 562. The control line 583 is connected to the gate of the second active switch 562. In this way, a storage capacitor is formed between the common electrode 563 and the pixel electrode 571, and a second storage capacitor is formed between the common electrode 563 and the sub-pixel electrode 572.

[0063] When the first control electrode 521 supplies power to the first heating element 522, the control line 583 does not turn on the second active switch 562; when the first control electrode 521 does not supply power to the first heating element 522, the control line 583 turns on the second active switch 562.

[0064] When the first control electrode 521 powers the first heating element 522, the second active switch 562 is in the off state, and the sub-pixel electrode 572 is disconnected from the pixel electrode 571. The sub-pixel electrode 572 acts as a shielding electrode to prevent the voltage change of the first heating layer 520 from affecting the voltage change of the common electrode 563 and the pixel electrode 571 above, thereby avoiding the phenomenon of grayscale abnormality in the display screen. Moreover, since a storage capacitor is formed between the common electrode 563 and the pixel electrode 571, it will not affect the normal display of the display panel 40.

[0065] When the first control electrode 521 does not energize the first heating element 522, the second active switch 562 is in the open state, the sub-pixel electrode 572 is connected to the pixel electrode 571, and the sub-pixel electrode 572 and the common electrode 563 form a storage capacitor, thereby increasing the size of the storage capacitor.

[0066] Furthermore, when the first control electrode 521 powers the first heating body 522, the voltage of the pixel electrode 571 can be detected. When the voltage of the pixel electrode 571 is 10V to 15V or -10V to -15V, the second active switch 562 is in the open state, and the sub-pixel electrode 572 is connected to the pixel electrode 571.

[0067] When the first control electrode 521 powers the first heating element 522, the voltage of the pixel electrode 571 is detected. When the voltage of the pixel electrode 571 is between -10V and 10V, the second active switch 562 is in the off state, and the sub-pixel electrode 572 is disconnected from the pixel electrode 571, thereby avoiding affecting the display effect.

[0068] Furthermore, the first side light-shielding part 543 and the second side light-shielding part 544 are made of metal materials, which can shield the first active switch 561 and the second active switch 562, and prevent the first active switch 561 and the second active switch 562 from interfering with each other and causing display problems.

[0069] For example, the first side light-shielding part 543 and the second side light-shielding part 544 can be connected together to provide more comprehensive shielding between the first active switch 561 and the second active switch 562.

[0070] Furthermore, the second active switch 562 is a p-type active switch, and the control line 583 can be directly connected to the first control electrode 521. In this way, when the first control electrode 521 powers the first heating element 522, the control line 583 is at a high level, and the second active switch 562 will automatically turn off. When the first control electrode 521 does not power the first heating element 522, the control line 583 is at a low level, and the second active switch 562 will automatically turn on, thereby simplifying circuit control.

[0071] It is understood that this application does not limit the type of the first active switch 561; when the second active switch 562 is controlled independently via the control line 583, the second active switch 562 can be either an N-type active switch or a P-type active switch. However, when the control line 583 is connected to the first control electrode 521, the second active switch 562 is a P-type active switch.

[0072] This application also discloses a display panel 40, which can be used in the display device 10 described above. Regarding the display panel 40, this application provides the following design:

[0073] Figure 6 This is a schematic diagram of a display panel according to an embodiment of this application, as shown below. Figure 6As shown, this application discloses a display panel 40, which includes an electrophoretic layer 300, a common electrode layer 400, a protective layer 100, and an array substrate 500. The electrophoretic layer 300 is disposed on the side of the pixel electrode layer 570 away from the substrate 511, the common electrode layer 400 is disposed on the side of the electrophoretic layer 300 away from the pixel electrode layer 570, and the protective layer 100 is disposed on the side of the common electrode layer 400 away from the electrophoretic layer 300.

[0074] The protective layer 100 includes a protective film 110 and a PET film 112, which are stacked on the color resist layer 200.

[0075] The array substrate 500 includes a substrate 511, a first heating layer 520, an active switching layer 560, and a pixel electrode layer 570. The first heating layer 520 and the active switching layer 560 are both disposed on the substrate 511. The pixel electrode layer 570 is located on the side of the active switching layer 560 away from the substrate 511. The first heating layer 520 includes a first control electrode 521 and a first heating body 522. The first control electrode 521 is connected to the first heating body 522 and is used to transmit current to the first heating body 522. The material of the first heating body 522 includes carbon black material.

[0076] The active switching layer 560 includes a plurality of first active switches 561, and the array substrate 500 also includes a plurality of first light-shielding structures 540. The first light-shielding structures 540 are located between the active switching layer 560 and the first heating layer 520, and the orthographic projection of the first light-shielding structures 540 on the substrate 511 covers the orthographic projection of the first active switches 561 on the substrate 511.

[0077] Compared to the existing display panel 40, the display panel 40 of this application provides a first heating layer 520 on the substrate 511, and the first control electrode 521 in the first heating layer 520 is connected to the first heating body 522. The material of the first heating body 522 includes carbon black material. The first control electrode 521 transmits current to the first heating body 522, thereby driving the first heating body 522 to heat up, resulting in more uniform heating and avoiding local hot spots.

[0078] Furthermore, by setting a first light-shielding structure 540 between the first heating layer 520 and the first active switch 561, the display abnormality problem caused by the infrared light radiation generated by the first heating layer 520 directly hitting the first active switch 561 can be avoided, thereby improving the display effect of the display panel 40.

[0079] Figure 7 This is a schematic diagram of a second heating layer according to an embodiment of this application, combined with... Figures 6-7 As shown, this application also provides a second heating layer 530. Specifically, the display panel 40 includes a pixel unit area 41 and a color resist layer 200. The color resist layer 200 includes a plurality of sub-color resists 210, which are arranged in a matrix. Each pixel unit area 41 corresponds to each sub-color resist 210.

[0080] The display panel 40 further includes a second heating layer 530, which is located between the color resist layer 200 and the protective layer 100. The second heating layer 530 includes a second control electrode 531 and a second heating body 532. The second control electrode 531 is connected to the second heating body 532 and is used to transmit current to the second heating body 532. The material of the second heating body 532 includes carbon black material. The second heating body 532 is mesh-like and covers the space between two adjacent sub-color resists 210.

[0081] In this way, the display panel 40 is heated and heated simultaneously by the first heating layer 520 and the second heating layer 530, which can avoid the situation where the movement speed of the electrophoretic particles in the electrophoretic layer 300 is reduced and the movement distance is blocked due to the low temperature, thereby improving the display effect of the display panel 40 at low ambient temperatures.

[0082] A groove 220 is provided on the color resist layer 200, and then the second heating layer 530 is disposed in the groove 220. Specifically, the groove 220 is provided on the color resist layer 200, and the groove 220 is located between two adjacent sub-color resists 210. The second heating body 532 is located in the groove 220.

[0083] The groove 220 is mesh-like, and to avoid contact between the second heating layer 530 and the common electrode layer 400, the groove 220 does not penetrate the color resist layer 200. The second heating body 532 is disposed in the groove 220. Since the groove 220 is located between two adjacent sub-color resists 210, it can serve as a black matrix to avoid color mixing problems in the display panel 40. Moreover, disposing of the second heating body 532 in the groove 220 can reduce the thickness of the display panel 40.

[0084] Figure 8 This is a schematic diagram of a second heating layer disposed on the color resist according to an embodiment of this application, as shown below. Figure 8As shown, since the material of the second heating body 532 is carbon black, it is not possible to lay a large area on the side of the electrophoretic layer 300 away from the substrate 511. As a result, the heating capacity of the side of the electrophoretic layer 300 used for displaying the image is low. Therefore, a third heating body 533 is also provided.

[0085] The second heating layer 530 also includes a third heating body 533. The second heating body 532, which is arranged in a mesh, defines multiple grids. The third heating body 533 is located within the grids and is connected to the second heating body 532. The second control electrode 531 is also used to transmit current to the third heating body 533. The material of the third heating body 533 includes light-transmitting graphene material.

[0086] The material of the third heating element 533 includes light-transmitting graphene material, so as not to affect the display effect of the display panel 40.

[0087] However, since the third heating element 533 also generates infrared radiation when heated due to its conductivity, this application also provides a second light-shielding structure 550 to prevent the infrared radiation from irradiating the first active switch 561 below. The second light-shielding structure 550 is located between the array substrate 500 and the electrophoretic layer 300. For example, the second light-shielding structure 550 is disposed on the side of the electrophoretic layer 300 near the pixel electrode layer 570. Since the electrophoretic layer 300 is bonded to the array substrate 500 after applying adhesive, in order to reduce the alignment difficulty between the second light-shielding structure 550 and the first active switch 561, this application can also arrange the second light-shielding structure 550 and the pixel electrode layer 570 in the same layer, thereby reducing the alignment difficulty between the second light-shielding structure 550 and the first active switch 561 and improving the light-shielding effect.

[0088] The orthographic projection of the second light-shielding structure 550 on the substrate 511 covers the orthographic projection of the first active switch 561 on the substrate 511, thus ensuring that the infrared radiation generated on the second heating layer 530 will not irradiate the first active switch 561.

[0089] Figure 9 This is a schematic diagram of a first control circuit and a second control circuit according to an embodiment of this application, as shown below. Figure 9As shown, the display panel 40 includes a first control circuit 31 and a second control circuit 32. The first control circuit 31 is connected to the first control electrode 521, and the second control circuit 32 is connected to the second control electrode 531. The first control circuit 31 is used to adjust the current of the first control electrode 521, and the second control circuit 32 is used to adjust the current of the second control electrode 531.

[0090] By setting up a first control circuit 31 and a second control circuit 32, the first heating layer 520 and the second heating layer 530 can be controlled separately. Since the second heating layer 530 is located on the side of the display panel 40 closer to the display, the heat generated by the second heating layer 530 is lost quickly, resulting in a low heating efficiency. By controlling the first control circuit 31 and the second control circuit 32 respectively, the current of the first control electrode 521 and the second control electrode 531 can be adjusted so that the current of the second control electrode 531 is greater than the current of the first control electrode 521, thereby balancing the heating efficiency of the first heating layer 520 and the second heating layer 530 on the electrophoretic layer 300, so that the electrophoretic layer 300 receives even heat on both the upper and lower sides.

[0091] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of 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. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0092] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. An array substrate, characterized by, The array substrate comprises a substrate, a first heat generating layer, an active switch layer and a pixel electrode layer, the first heat generating layer and the active switch layer are arranged on the substrate, the pixel electrode layer is located on a side of the active switch layer away from the substrate, the first heat generating layer comprises a first control electrode and a first heat generating body, the first control electrode is connected with the first heat generating body, the first control electrode is used for transmitting current to the first heat generating body, and a material of the first heat generating body comprises carbon black material. The active switch layer comprises a plurality of first active switches, and the array substrate further comprises a plurality of first light shielding structures, the first light shielding structures are located between the active switch layer and the first heat generating layer, and a normal projection of the first light shielding structures on the substrate covers a normal projection of the first active switches on the substrate. The first light shielding structure can avoid direct irradiation of infrared light radiation generated by the first heat generating layer to the first active switch.

2. The array substrate of claim 1, wherein, The first heat generating layer is located on a side of the substrate away from the active switch layer.

3. The array substrate of claim 2, wherein, The array substrate further comprises a sub-pixel electrode, a common electrode, a second active switch and a control line, the sub-pixel electrode and the common electrode are arranged on the substrate, the common electrode is located between the sub-pixel electrode and the pixel electrode, a normal projection of the sub-pixel electrode on the substrate covers a normal projection of the common electrode on the substrate, the sub-pixel electrode and the pixel electrode are respectively connected with a source electrode and a drain electrode of the second active switch, and the control line is connected with a gate electrode of the second active switch. When the first control electrode supplies power to the first heat generating body, the second active switch is in a closed state; when the first control electrode does not supply power to the first heat generating body, the second active switch is in an open state.

4. The array substrate of claim 1, wherein, The active switch layer comprises a first metal layer, a first insulating layer, a second metal layer and a second insulating layer, and the first metal layer, the first insulating layer, the second metal layer and the second insulating layer are sequentially arranged on the substrate. The first light shielding structure comprises a bottom light shielding part and a side light shielding part, the side light shielding part is connected with an edge of the bottom light shielding part, the bottom light shielding part is located between the substrate and the first metal layer, and the side light shielding part at least penetrates through the first insulating layer.

5. A display panel, characterized by, The display panel comprises an electrophoretic layer, a common electrode layer, a protective layer and the array substrate as claimed in any one of claims 1-4, the electrophoretic layer is arranged on a side of the pixel electrode layer away from the substrate, the common electrode layer is arranged on a side of the electrophoretic layer away from the pixel electrode layer, and the protective layer is arranged on a side of the common electrode layer away from the electrophoretic layer.

6. The display panel of claim 5, wherein, The display panel comprises a pixel unit region, and further comprises a color resistance layer, the color resistance layer comprises a plurality of sub-color resistances, and the plurality of sub-color resistances are arranged in a matrix. The display panel further comprises a second heating layer, the second heating layer is located between the color resistance layer and the protective layer, the second heating layer comprises a second control electrode and a second heating body, the second control electrode is connected with the second heating body, the second control electrode is used for transmitting current to the second heating body, and a material of the second heating body comprises carbon black material; the second heating body is in a mesh shape, and the second heating body covers between two adjacent sub-color resistances.

7. The display panel of claim 6, wherein, The color resistance layer is provided with a groove, the groove is located between two adjacent sub-color resistances, and the second heating body is located in the groove.

8. The display panel of claim 6, wherein, The second heating layer further comprises a third heating body, the second heating body arranged in a mesh shape defines a plurality of meshes, the third heating body is located in the mesh, and the third heating body is connected with the second heating body, the second control electrode is further used for transmitting current to the third heating body, and a material of the third heating body comprises light-transmitting graphene material.

9. The display panel of claim 6, wherein, The display panel comprises a first control circuit and a second control circuit, the first control circuit is connected with the first control electrode, the second control circuit is connected with the second control electrode, the first control circuit is used for adjusting the current size of the first control electrode, and the second control circuit is used for adjusting the current size of the second control electrode.

10. A display device, characterized by comprising: The display device comprises a driving circuit and the display panel as claimed in any one of claims 5-9, and the driving circuit and the display panel are connected.

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