Array substrate, display panel and display device

Abstract

The invention 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 both arranged on the substrate, and the pixel electrode layer is located on the side, away from the substrate, of the active switch layer. 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, and the material of the first heating main body comprises a carbon black material; the active switch layer comprises a plurality of first active switches, the array substrate further comprises a plurality of first shading structures, the first shading structures are located between the active switch layer and the first heating layer, and orthographic projections of the first shading structures on the substrate cover orthographic projections of the first active switches on the substrate. Through the design, the temperature rise uniformity of the display panel is improved, and the display effect of the display panel is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to an array substrate, a display panel and a display device. BACKGROUND

[0002] Electronic paper technology is widely used in electronic book readers, electronic tags, smart wear and other fields. In recent years, with the continuous evolution of electronic paper technology, the application scenarios are continuously expanding.

[0003] In electronic paper technology, display relies on the movement of electrophoretic particles under the action of an electric field to display content. In a low-temperature environment, the viscosity of the electrophoretic liquid increases, the particle migration speed slows down, and the particles cannot normally move to the target position, resulting in poor display effect of the display panel. SUMMARY

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

[0005] The present application discloses an array substrate, which 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 both 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 body, the first control electrode is connected with the first heating body, the first control electrode is used for transmitting current to the first heating body, and the material of the first heating body comprises a 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 heating layer, and the orthographic projection of the first light shielding structures on the substrate covers the orthographic projection of the first active switches on the substrate.

[0006] Optionally, the first heating layer is located on the side of the substrate away from the active switch layer.

[0007] Optionally, 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 both arranged on the substrate, and the common electrode is located between the sub-pixel electrode and the pixel electrode, the orthographic projection of the sub-pixel electrode on the substrate covers the orthographic projection of the common electrode on the substrate, the sub-pixel electrode and the pixel electrode are respectively connected with the source and the drain of the second active switch, and the control line is connected with the gate of the second active switch.

[0008] Optionally, the active switch layer comprises a first metal layer, a first insulating layer, a second metal layer and a second insulating layer, 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 the 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 the first insulating layer.

[0009] The application further discloses a display panel, which comprises an electrophoretic layer, a common electrode layer, a protective layer and an array substrate, the electrophoretic layer is arranged on the side of the pixel electrode layer away from the substrate, the common electrode layer is arranged on the side of the electrophoretic layer away from the pixel electrode layer, and the protective layer is arranged on the side of the common electrode layer away from the electrophoretic layer.

[0010] Optionally, the display panel comprises a pixel unit region, and the display panel 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 main body, the second control electrode is connected with the second heating main body, the second control electrode is used for transmitting current to the second heating main body, and the material of the second heating main body comprises carbon black material; the second heating main body is in a mesh shape, and the second heating main body covers between two adjacent sub-color resistances.

[0011] Optionally, a groove is arranged on the color resistance layer, the groove is located between two adjacent sub-color resistances, and the second heating main body is located in the groove.

[0012] Optionally, the second heating layer further comprises a third heating main body, the second heating main body arranged in a mesh shape defines a plurality of meshes, the third heating main body is located in the mesh, the third heating main body is connected with the second heating main body, the second control electrode is further used for transmitting current to the third heating main body, and the material of the third heating main body comprises light-transmitting graphene material.

[0013] Optionally, 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.

[0014] The application further discloses a display device comprising a driving circuit and a display panel.

[0015] Compared with the prior scheme of heating by arranging a metal layer on an array substrate, the application arranges a first heating layer on the substrate, and the first control electrode in the first heating layer is connected with the first heating body, the material of the first heating body comprises carbon black material, the first control electrode transmits current to the first heating body, so as to drive the first heating body to heat, the heating is more uniform, and the local hot spot is avoided; and the first light shielding structure is arranged between the first heating layer and the first active switch, so that the display abnormal problem caused by the direct radiation of infrared light from the first heating layer to the first active switch is avoided, and the display effect of the display panel is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings included are intended to provide a further understanding of the embodiments of the application, and constitute a part of the specification, used to illustrate the embodiments of the application, and together with the text description, to explain the principle of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings: Figure 1 is a schematic diagram of a display device of an embodiment of the application; Figure 2 is a schematic diagram of an array substrate in which the first heating layer and the active switch layer are located on the two sides of the substrate, respectively, of an embodiment of the application; Figure 3 is a schematic diagram of an array substrate in which the first heating layer and the active switch layer are located on the same side of the substrate, of an embodiment of the application; Figure 4 is a schematic diagram of an array substrate of an embodiment of the application; Figure 5 is a schematic diagram of a sub-pixel electrode of an embodiment of the application; Figure 6 is a schematic diagram of a display panel of an embodiment of the application; Figure 7 is a schematic diagram of a second heating layer of an embodiment of the application; Figure 8 is a schematic diagram of a second heating layer arranged on the color resistance of an embodiment of the application; Figure 9 is a schematic diagram of a first control circuit and a second control circuit of an embodiment of the application.

[0017] Wherein, 10, display device; 20, driving circuit; 31, first control circuit; 32, second control circuit; 40, display panel; 41, pixel unit area; 100, protective layer; 110, protective film; 112, PET film; 200, color resistance layer; 210, sub color resistance; 220, groove; 300, electrophoretic layer; 400, common electrode layer; 500, array substrate; 511, substrate; 512, heat generating layer insulation layer; 513, first metal layer; 514, first insulation layer; 515, second metal layer; 516, second insulation layer; 520, first heat generating layer; 521, first control electrode; 522, first heat generating body; 530, second heat generating layer; 531, second control electrode; 532, second heat generating body; 533, third heat generating 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 slot; 720, second annular through slot. DETAILED DESCRIPTION

[0018] It is to be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting. The detailed description is in terms of specific structural and functional details.

[0019] In the description of the present application, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating relative importance or a number of indicated technical features. Thus, unless otherwise stated, features defined with "first", "second" or "third" can explicitly or implicitly include one or more of the features; the meaning of "a plurality" is two or more. The term "include" and any variation thereof means to include without excluding, and can exist or be added with one or more other features, integers, steps, operations, units, components and / or combinations thereof.

[0020] In addition, the terms indicating the orientation or positional relationship of "center", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are described based on the orientation or relative position relationship shown in the drawings, and are only for the convenience of the simplified description of the present application, and are not intended to indicate that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0021] In addition, unless specifically stated and limited otherwise, the terms "mounting", "connected", "connecting" should be interpreted broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, can be electrically connected, can be directly connected, or indirectly connected through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0022] The application will be described in detail below with reference to the accompanying drawings and optional embodiments.

[0023] Figure 1 is a schematic diagram of a display device according to an embodiment of the application, as Figure 1 The display device 10 disclosed in the application comprises a driving circuit 20 and a display panel 40, and the driving circuit 20 and the display panel 40 are connected.

[0024] The driving circuit 20 is used to drive the display panel 40 to display a picture.

[0025] The application also discloses an array substrate 500, which can be used in the display device 10 described above, and the application provides the following design for the array substrate 500. Figure 2 is a schematic diagram of an array substrate according to an embodiment of the application, in which a first heat generating layer and an active switch layer are located on two sides of a substrate, Figure 3 is a schematic diagram of an array substrate according to an embodiment of the application, in which a first heat generating layer and an active switch layer are located on the same side of a substrate, as Figures 2-3 The application discloses an array substrate 500, which comprises a substrate 511, a first heat generating layer 520, an active switch layer 560 and a pixel electrode layer 570, the first heat generating layer 520 and the active switch layer 560 are arranged on the substrate 511, the pixel electrode layer 570 is located on a side of the active switch layer 560 away from the substrate 511, the first heat generating layer 520 comprises a first control electrode 521 and a first heat generating body 522, the first control electrode 521 is connected with the first heat generating body 522, the first control electrode 521 is used to transmit current to the first heat generating body 522, and the material of the first heat generating body 522 comprises a carbon black material.

[0026] The active switch layer 560 includes a plurality of first active switches 561, and the array substrate 500 further includes a plurality of first light shielding structures 540, the first light shielding structures 540 are located between the active switch 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 with the pixel electrodes 571.

[0027] Since the first heating body 522 of the carbon black material heats in a planar manner, the problem of "hot spots" as in the case of metal layer heating does not occur, and the first heating body 522 of the carbon black material emits infrared radiation when heating, and the heat penetration is strong.

[0028] Compared with the existing array substrate 500 heating scheme by setting a metal layer, the present application sets the first heating layer 520 on the substrate 511, and the first control electrode 521 in the first heating layer 520 is connected with the first heating body 522, the material of the first heating body 522 includes carbon black material, and the first control electrode 521 transmits current to the first heating body 522, so as to drive the first heating body 522 to heat, which is more uniform and avoids the occurrence of local hot spots.

[0029] Moreover, by setting the first light shielding structure 540 between the first heating layer 520 and the first active switch 561, the problem of display abnormality caused by the direct irradiation of the infrared radiation generated by the first heating layer 520 to the first active switch 561 can be avoided, thereby improving the display effect of the display panel 40.

[0030] The flexibility of the first heating body 522 is better than that of the metal layer, so that when the array substrate 500 is used in the flexible display panel 40, the problem of cracking and breaking is less likely to occur, and the phenomenon of local heating failure is avoided.

[0031] When heating, if the infrared radiation continuously irradiates the first active switch 561, it will affect the control accuracy of the pixel voltage of the first active switch 561 to the pixel electrode 571, causing color shift; and it will also cause the switching speed of the first active switch 561 to decrease, causing picture trailing or dynamic blur, and the present application sets the first light shielding structure 540 to shield the infrared radiation, thereby preventing the abnormality of the first active switch 561. The heating voltage of the first heating body 522 is between 3-24V, which has less effect on the array substrate 500.

[0032] Referring to Figure 2For example, the first heat-generating layer 520 is located on the side of the substrate 511 away from the active switch layer 560. In other words, the first heat-generating layer 520 and the active switch layer 560 are arranged on opposite sides of the substrate 511, so that the material for preparing the first heat-generating layer 520 does not affect the active switch layer 560.

[0033] Referring to Figure 3 For example, the first heat-generating layer 520 and the active switch layer 560 can be arranged on the same side of the substrate 511, and in this case, the first heat-generating layer 520 is located between the substrate 511 and the active switch layer 560, and a heat-generating layer insulating layer 512 needs to be arranged between the active switch layer 560 and the first heat-generating layer 520. Specifically, The array substrate 500 further comprises a heat-generating layer insulating layer 512, and the first heat-generating layer 520 is arranged on the side of the substrate 511 close to the active switch layer 560, and the heat-generating layer insulating layer 512 is located between the active switch layer 560 and the first heat-generating layer 520.

[0034] By arranging the first heat-generating layer 520 and the active switch layer 560 on the same side of the substrate 511, the substrate 511 does not need to be flipped during preparation, which reduces the preparation process, reduces the preparation difficulty, and improves the product yield.

[0035] Figure 4 is a schematic diagram of an array substrate according to an embodiment of the present application, as Figure 4 As shown in the figure, the active switch layer 560 comprises a first metal layer 513, a first insulating layer 514, a second metal layer 515, and a second insulating layer 516, and the first metal layer 513, the first insulating layer 514, the second metal layer 515, and the second insulating layer 516 are arranged in sequence on the substrate 511.

[0036] The first light-shielding structure 540 comprises a bottom light-shielding portion 541 and a side light-shielding portion 542, the side light-shielding portion 542 is connected with 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, and the side light-shielding portion 542 at least penetrates the first insulating layer 514.

[0037] Moreover, by arranging the side light-shielding portion 542, the irradiation of the infrared light radiation emitted by the first heat-generating body 522 other than below the first active switch 561 is avoided, thereby achieving the purpose of more comprehensively preventing continuous high temperature.

[0038] 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 in the first insulating layer 514; of course, it is also possible that the side light shielding part 542 penetrates the first insulating layer 514 and the second insulating layer 516, in other words, the side light shielding part 542 is arranged in the first insulating layer 514 and the second insulating layer 516.

[0039] When the side light shielding part 542 penetrates the first insulating layer 514 and the second insulating layer 516, the side light shielding part 542 needs to be divided into two parts, which are the first side light shielding part 543 in the first insulating layer 514 and the second side light shielding part 544 in the second insulating layer 516.

[0040] When being prepared, first, the bottom light shielding part 541 is formed on the substrate 511, then the first metal layer 513 is formed on the bottom light shielding part 541, then the first insulating layer 514 is formed on the first metal layer 513, then the first annular through groove 710 is arranged on the first insulating layer 514, the first side light shielding part 543 is arranged in the first annular through groove 710, then the semiconductor layer and the second metal layer 515 are formed on the first insulating layer 514, then the second insulating layer 516 is formed on the second metal layer 515, then the second annular through groove 720 is arranged on the second insulating layer 516, and the second side light shielding part 544 is arranged in the second annular through groove 720.

[0041] The bottom light shielding part 541 adopts insulating light shielding material, for example, black matrix material, etc.

[0042] 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 the 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.

[0043] 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 the drain are located in the first metal layer 513, and the semiconductor layer is located between the first metal layer 513 and the substrate 511.

[0044] For the convenience of description, the first active switch 561 is taken as an example of a double-gate first active switch 561.

[0045] And when the first active switch 561 is a top gate type active switch, the total area of the source and the 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, the surrounding area of the second annular through slot 720 is smaller than the surrounding area of the second annular through slot 720, in other words, the distance between the second annular through slot 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 slot 710 on the left and right sides of the source and the drain of the first active switch 561 in the first metal layer 513, when the infrared light radiation emitted from the first heat source 522 propagates obliquely upward, due to the second side light shielding part 544 being equivalent to inward contraction, so part of the infrared light radiation irradiated to the first side light shielding part 543 will not be shielded by the second side light shielding part 544, but can smoothly propagate upward, so that too much infrared light radiation can be shielded by the whole first light shielding structure 540.

[0046] Figure 5 is a schematic view of a sub-pixel electrode of an embodiment of the present application, in combination with Figure 4 and Figure 5 As shown in the figures, the active switch layer 560 further comprises a common electrode 563, the common electrode 563 is arranged in the second metal layer 515, so that a storage capacitor is formed between the common electrode 563 and the pixel electrode 571.

[0047] The array substrate 500 further comprises a data line 581, a scan line 582 and a control line 583, the data line 581 is connected with the source of the first active switch 561, the scan line 582 is connected with the drain of the first active switch 561, and the pixel electrode 571 is connected with the drain of the first active switch 561. The array substrate 500 further comprises a sub-pixel electrode 572 and a second active switch 562, the sub-pixel electrode 572 and the common electrode 563 are both arranged 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 arranged on the first metal layer 513, the common electrode 563 is arranged on the second metal layer 515, the orthographic projection of the sub-pixel electrode 572 on the substrate 511 covers the orthographic projection of the common electrode 563 on the substrate 511, the sub-pixel electrode 572 and the pixel electrode 571 are respectively connected with the source and the drain of the second active switch 562, and the control line 583 is connected with the gate of the second active switch 562, so that 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.

[0048] When the first control electrode 521 supplies power to the first heat main body 522, the control line 583 does not open the second active switch 562, and when the first control electrode 521 does not supply power to the first heat main body 522, the control line 583 opens the second active switch 562.

[0049] Thus, when the first control electrode 521 supplies power to the first heat main body 522, the second active switch 562 is in the closed state, the sub-pixel electrode 572 is disconnected from the pixel electrode 571, and the sub-pixel electrode 572 functions as a shielding electrode, avoiding the voltage change of the first heat layer 520 from affecting the voltage change of the common electrode 563 and the pixel electrode 571 above, thereby avoiding the abnormal grayscale phenomenon of the display screen, and since a storage capacitor is formed between the common electrode 563 and the pixel electrode 571, the normal display of the display panel 40 is not affected.

[0050] When the first control electrode 521 does not supply power to the first heat main body 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 forms a storage capacitor with the common electrode 563, thereby increasing the size of the storage capacitor.

[0051] Furthermore, the voltage of the pixel electrode 571 can be detected when the first control electrode 521 supplies power to the first heat main body 522, and 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.

[0052] The voltage of the pixel electrode 571 is detected when the first control electrode 521 supplies power to the first heat main body 522, and when the voltage of the pixel electrode 571 is -10V to 10V, the second active switch 562 is in the closed state, and the sub-pixel electrode 572 is disconnected from the pixel electrode 571, thereby avoiding affecting the display effect.

[0053] Furthermore, the first side light shielding portion 543 and the second side light shielding portion 544 are made of metal material, thereby shielding the first active switch 561 and the second active switch 562, avoiding mutual influence between the first active switch 561 and the second active switch 562, and causing display problems.

[0054] For example, the first side light shielding portion 543 and the second side light shielding portion 544 can be connected together, thereby more comprehensively shielding between the first active switch 561 and the second active switch 562.

[0055] 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.

[0056] 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.

[0057] 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: Figure 6 This is a schematic diagram of a display panel according to an embodiment of this application, as shown below. Figure 6 As 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.

[0058] The protective layer 100 includes a protective film 110 and a PET film 112, which are stacked on the color resist layer 200.

[0059] 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.

[0060] The active switch layer 560 includes a plurality of first active switches 561, and the array substrate 500 further includes a plurality of first light shielding structures 540, the first light shielding structures 540 are located between the active switch layer 560 and the first heat generation 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.

[0061] Compared with the existing display panel 40, the display panel 40 of the present application sets the first heat generation layer 520 on the substrate 511, and the first control electrode 521 in the first heat generation layer 520 is connected with the first heat generation body 522, the material of the first heat generation body 522 includes carbon black material, the first control electrode 521 transmits current to the first heat generation body 522, so as to drive the first heat generation body 522 to generate heat, and the heat generation is more uniform, avoiding the occurrence of local hot spot.

[0062] Moreover, by setting the first light shielding structure 540 between the first heat generation layer 520 and the first active switch 561, the display abnormal problem caused by the direct radiation of infrared light from the first heat generation layer 520 to the first active switch 561 can be avoided, and the display effect of the display panel 40 is improved.

[0063] Figure 7 is a schematic view of a second heat generation layer of an embodiment of the present application, in combination with Figures 6-7 As shown in the figure, the present application further sets a second heat generation layer 530, specifically, the display panel 40 includes a pixel unit region 41, and the display panel 40 further includes a color resistance layer 200, the color resistance layer 200 includes a plurality of sub-color resistances 210, and the plurality of sub-color resistances 210 are arranged in a matrix; each pixel unit region 41 corresponds to each sub-color resistance 210.

[0064] The display panel 40 further includes a second heat generation layer 530, the second heat generation layer 530 is located between the color resistance layer 200 and the protective layer 100, the second heat generation layer 530 includes a second control electrode 531 and a second heat generation body 532, the second control electrode 531 is connected with the second heat generation body 532, the second control electrode 531 is used for transmitting current to the second heat generation body 532, and the material of the second heat generation body 532 includes carbon black material; and the second heat generation body 532 is in a mesh shape, and the second heat generation body 532 covers between two adjacent sub-color resistances 210.

[0065] In this way, the display panel 40 is heated and warmed up by the first heating layer 520 and the second heating layer 530 at the same time, so that the display effect of the display panel 40 in a low-temperature environment can be improved, and the situation that the moving speed of the electrophoretic particles in the electrophoretic layer 300 is reduced and the moving distance is blocked in a low-temperature state can be avoided.

[0066] The color resistance layer 200 is provided with a groove 220, and the second heating layer 530 is arranged in the groove 220. Specifically, the color resistance layer 200 is provided with a groove 220, and the groove 220 is located between two adjacent sub-color resistances 210. The second heating body 532 is located in the groove 220.

[0067] The groove 220 is in a mesh shape, and the groove 220 does not penetrate through the color resistance layer 200 to avoid the contact between the second heating layer 530 and the common electrode layer 400. The second heating body 532 is arranged in the groove 220. Since the groove 220 is located between two adjacent sub-color resistances 210, the groove 220 can function as a black matrix to avoid the color mixing problem of the display panel 40. In addition, the second heating body 532 arranged in the groove 220 can reduce the thickness of the display panel 40.

[0068] Figure 8 FIG. 2 is a schematic view of a second heating layer arranged on a color resistance according to an embodiment of the present application. Figure 8 Since the material of the second heating body 532 is carbon black material, the second heating body 532 cannot be arranged in a large area on the side of the electrophoretic layer 300 away from the substrate 511. Therefore, the third heating body 533 is arranged.

[0069] The second heating layer 530 further includes a third heating body 533. The second heating body 532 arranged in a mesh shape defines a plurality of meshes. The third heating body 533 is located in the meshes, and the third heating body 533 is connected to the second heating body 532. The second control electrode 531 is further used to transmit electric current to the third heating body 533. The material of the third heating body 533 includes light-transmitting graphene material.

[0070] The material of the third heating body 533 includes light-transmitting graphene material, so as not to affect the display effect of the display panel 40.

[0071] However, when the third heating main body 533 conducts electricity to heat, infrared radiation is also generated. In order to avoid the infrared radiation from irradiating the first active switch 561 below, the application further provides a second light shielding structure 550, which is located between the array substrate 500 and the electrophoretic layer 300. For example, the second light shielding structure 550 is arranged on the side of the electrophoretic layer 300 close to the pixel electrode layer 570. Since the electrophoretic layer 300 is bonded to the array substrate 500 after being coated with glue on the array substrate 500, in order to reduce the alignment difficulty between the second light shielding structure 550 and the first active switch 561, the application can further 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.

[0072] 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, that is, the infrared radiation generated on the second heating layer 530 will not irradiate the first active switch 561.

[0073] Figure 9 is a schematic diagram of a first control circuit and a second control circuit of an embodiment of the application, as Figure 9 As shown in the figure, the display panel 40 includes a first control circuit 31 and a second control circuit 32. The first control circuit 31 is connected with the first control electrode 521, and the second control circuit 32 is connected with the second control electrode 531. The first control circuit 31 is used to adjust the current size of the first control electrode 521, and the second control circuit 32 is used to adjust the current size of the second control electrode 531.

[0074] By arranging the first control circuit 31 and the 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 close to the display, the heat generated by the second heating layer 530 is lost quickly, resulting in low heating efficiency of the second heating layer 530. By controlling the first control circuit 31 and the second control circuit 32 respectively, the current size 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 that of the first control electrode 521, thereby balancing the heating efficiency of the electrophoretic layer 300 by the first heating layer 520 and the second heating layer 530, so that the electrophoretic layer 300 is subjected to balanced heat on both sides.

[0075] It should be noted that the inventive concept of the present application can form a very large number of embodiments, but the length of the application file is limited and cannot list them one by one, so under the premise of not conflicting, the above described various embodiments or various technical features can be combined to form new embodiments, and the combination of each embodiment or technical feature will enhance the original technical effect.

[0076] The above is a further detailed description of the present application in combination with specific optional embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as belonging to the protection scope of the present 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.

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 connected with a source electrode and a drain electrode of the second active switch respectively, and the control line is connected with a gate electrode of the second active switch.

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 heat generating layer, the second heat generating layer is located between the color resistance layer and the protective layer, the second heat generating layer comprises a second control electrode and a second heat generating body, the second control electrode is connected with the second heat generating body, the second control electrode is used for transmitting current to the second heat generating body, and a material of the second heat generating body comprises carbon black material; the second heat generating body is in a mesh shape, and the second heat generating body covers between adjacent two sub-color resistances.

7. The display panel of claim 6, wherein, A groove is arranged on the color resistance layer, the groove is located between adjacent two sub-color resistances, and the second heat generating 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 meshes, and the third heating body is connected with the second heating body, the second control electrode is further used for transmitting electric current to the third heating body, and a material of the third heating body comprises a 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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