Electronic paper display and control method

Abstract

The invention discloses an electronic paper display and a control method, the electronic paper display comprises an opposed substrate, an array substrate and an ink capsule, the ink capsule comprises black ink particles, white ink particles and a capsule shell, the capsule shell comprises a heat conduction layer made of a transparent insulating heat conduction material, the array substrate is provided with a pixel electrode, and the array substrate is provided with a transparent insulating heat conduction layer. The opposed substrate is provided with a common electrode; a heating layer is arranged on the opposite substrate and / or the array substrate, and the heating layer is used for heating the electronic paper display. The heating layer is arranged on the opposed substrate and / or the array substrate to heat the electronic paper display, and the capsule shell comprises the heat conduction layer made of the transparent insulating heat conduction material, so that the ink capsule can quickly absorb heat emitted by the heating layer and quickly heat, the viscosity coefficient of liquid in the ink capsule is reduced, and the electronic paper display can be quickly heated. The moving speed of the black ink particles and the white ink particles is increased, so that the response speed during picture refreshing is increased, the problem of ghost shadow is avoided, and the use experience is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to an electronic paper display and its control method. Background Technology

[0002] Display panels offer advantages such as thinness, durability, and low power consumption, which are energy-efficient and environmentally friendly. However, they require a backlight, resulting in a thicker module and higher cost. Electronic paper displays (reflective displays) have emerged as a solution to meet the needs of the general public. Unlike LCD displays, which require a backlight, electronic paper displays can use external light sources to display images. Therefore, even in strong sunlight, the information on the electronic paper remains clearly visible without viewing angle issues. Furthermore, due to their energy efficiency, high reflectivity, and high contrast ratio, electronic paper displays are now widely used in e-readers (such as e-books and e-newspapers) and other electronic components (such as price tags).

[0003] Existing electronic paper displays typically employ E-Ink microcapsule technology (microcapsule electronic ink technology), SiPix microcup technology (microcup electrophoretic display technology), Bridgestone electronic liquid powder technology, Cholesteric Liquid Crystal Display (CLCD) technology, microelectromechanical systems (MEMS) technology, or electrowetting technology. However, existing electronic paper display technologies are less mature than liquid crystal display technologies, have lower mass production efficiency, higher manufacturing costs, and can only achieve black and white displays.

[0004] However, e-ink screens (using E-Ink microcapsule technology) also have their own drawbacks. One of their main drawbacks is their very small operating temperature range. This is because when working in low-temperature environments, especially below 0°C, the viscosity coefficient of the liquid inside the capsule increases. When an electric field is applied to the ink particles, the viscous resistance experienced by the black and white ink particles also increases, causing abnormal movement. This slows down the response speed when the screen refreshes, requiring a longer time to reach the target position, resulting in blurred images and text, ghosting, or even the entire screen turning completely white or black, making it impossible to distinguish the image and seriously affecting normal use. Summary of the Invention

[0005] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide an electronic paper display and a control method to solve the problem that the response speed of electronic paper displays slows down in low-temperature environments.

[0006] The objective of this invention is achieved through the following technical solution: This invention provides an electronic paper display, comprising a counter substrate, an array substrate disposed opposite to the counter substrate, and an ink capsule disposed between the counter substrate and the array substrate. The ink capsule includes black ink particles, white ink particles, and a capsule shell. The black ink particles and the white ink particles have opposite polarities and are disposed within the capsule shell. The capsule shell includes a thermally conductive layer made of a transparent insulating thermally conductive material. The array substrate has a plurality of pixel electrodes arranged in an array on the side facing the ink capsule. The counter substrate has a common electrode that cooperates with the pixel electrodes on the side facing the ink capsule. A heating layer is provided on the counter substrate and / or the array substrate for heating the electronic paper display.

[0007] Furthermore, the heating layer is located in the non-display area at the edge of the electronic paper display.

[0008] Furthermore, the electronic paper display has a plurality of pixel units arranged in an array, and the heating layer has a mesh structure that spaces the plurality of pixel units apart from each other.

[0009] Furthermore, the electronic paper display has a plurality of pixel units arranged in an array, the heating layer is disposed on the array substrate and located on the side of the pixel electrode away from the ink capsule, and the heating layer includes a plurality of heating strips, each of the heating strips corresponding to a column or a row of the pixel units.

[0010] Furthermore, a baffle is provided between the opposing substrate and the array substrate, and the baffle forms a plurality of receiving cavities by dividing the gap between the opposing substrate and the array substrate, and the ink capsule is disposed in the receiving cavity.

[0011] Furthermore, the barrier is made of an insulating and thermally conductive material, and the heating layer is disposed on the side of the opposing substrate and / or the array substrate closest to the ink capsule and is in contact with the barrier.

[0012] Furthermore, the heating layer is an arc-shaped structure that matches the shape of the capsule shell. The heating layer is located on the side of the array substrate closest to the ink capsule and is in contact with the outer surface of the capsule shell.

[0013] Furthermore, the array substrate has a septum layer on the side facing the ink capsule, the septum layer has a groove that matches the heating layer, and the heating layer is disposed in the groove and located between the septum layer and the capsule shell.

[0014] Furthermore, the insulating layer and planarization layer on the opposing substrate and / or the array substrate are both made of transparent insulating and thermally conductive material.

[0015] This application also provides a control method for an electronic paper display, used to control the electronic paper display as described above, the control method comprising: When the temperature of the electronic paper display is lower than the preset temperature, the heating layer is controlled to heat the electronic paper display. When the temperature of the electronic paper display is greater than or equal to a preset temperature, the heating of the heating layer is turned off.

[0016] The beneficial effects of this invention are as follows: by setting a heating layer on the opposing substrate and / or array substrate, the electronic paper display can be heated. Moreover, the capsule shell of the ink capsule includes a thermally conductive layer made of a transparent insulating thermally conductive material, which allows the ink capsule to quickly absorb the heat emitted by the heating layer and heat up rapidly. This reduces the viscosity coefficient of the liquid inside the ink capsule, increases the movement speed of black ink particles and white ink particles inside the ink capsule, thereby improving the response speed when the screen is refreshed, avoiding the problem of ghosting, and enhancing the user experience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the electronic paper display in its initial state according to Embodiment 1 of the present invention.

[0018] Figure 2 This is one of the schematic diagrams of the planar structure of the heating layer in Embodiment 1 of the present invention.

[0019] Figure 3 This is the second schematic diagram of the planar structure of the heating layer in Embodiment 1 of the present invention.

[0020] Figure 4 This is a schematic diagram of the planar structure of the opposing substrate in Embodiment 1 of the present invention.

[0021] Figure 5 This is a schematic diagram of the planar structure of the array substrate in Embodiment 1 of the present invention.

[0022] Figure 6 This is a schematic diagram of the electronic paper display in the display state according to Embodiment 1 of the present invention.

[0023] Figure 7 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 2 of the present invention.

[0024] Figure 8 This is a schematic diagram of the electronic paper display in display mode according to Embodiment 2 of the present invention.

[0025] Figure 9 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 3 of the present invention.

[0026] Figure 10This is a schematic diagram of the planar structure of the heating layer in Embodiment 3 of the present invention.

[0027] Figure 11 This is a schematic diagram of the electronic paper display in display mode according to Embodiment 3 of the present invention.

[0028] Figure 12 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 4 of the present invention.

[0029] Figure 13 This is a schematic diagram of the electronic paper display in the display state according to Embodiment 4 of the present invention.

[0030] Figure 14 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 5 of the present invention.

[0031] Figure 15 This is a schematic diagram of the electronic paper display in display mode according to Embodiment 5 of the present invention.

[0032] Figure 16 This is a schematic diagram of the electronic paper display in its initial state in Embodiment Six of the present invention.

[0033] Figure 17 This is a schematic diagram of the electronic paper display in display mode according to Embodiment Six of the present invention.

[0034] Figure 18 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 7 of the present invention.

[0035] Figure 19 This is a schematic diagram of the planar structure of the heating layer in Embodiment 7 of the present invention.

[0036] Figure 20 This is a schematic diagram of the electronic paper display in display mode according to Embodiment 7 of the present invention.

[0037] Figure 21 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 8 of the present invention.

[0038] Figure 22 This is a schematic diagram of the electronic paper display in display mode in Embodiment 8 of the present invention. Detailed Implementation

[0039] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, provides a detailed explanation of the specific implementation methods, structures, features, and effects of the electronic paper display and control method proposed according to the present invention: [Example 1] Figure 1This is a schematic diagram of the electronic paper display in its initial state according to Embodiment 1 of the present invention. Figure 2 This is one of the schematic diagrams of the planar structure of the heating layer in Embodiment 1 of the present invention. Figure 3 This is the second schematic diagram of the planar structure of the heating layer in Embodiment 1 of the present invention. Figure 4 This is a schematic diagram of the planar structure of the opposing substrate in Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of the planar structure of the array substrate in Embodiment 1 of the present invention.

[0040] like Figures 1 to 5 As shown, an electronic paper display provided in Embodiment 1 of the present invention includes a counter substrate 10, an array substrate 20 disposed opposite to the counter substrate 10, and an ink capsule 30 disposed between the counter substrate 10 and the array substrate 20. The ink capsule 30 includes black ink particles 31, white ink particles 32, and a capsule shell 33. The black ink particles 31 and white ink particles 32 have opposite polarities and are both disposed within the capsule shell 33. By providing electric fields in different directions to the ink capsule 30, the black ink particles 31 and white ink particles 32 can move in corresponding directions. For example, if the black ink particles 31 are negatively charged and the white ink particles 32 are positively charged, the white ink particles 32 will move in the direction of the electric field, and the black ink particles 31 will move in the opposite direction of the electric field. If an electric field is provided in the upward direction, the white ink particles 32 will move in the upward direction, and the black ink particles 31 will move in the downward direction; if an electric field is provided in the downward direction, the white ink particles 32 will move in the downward direction, and the black ink particles 31 will move in the upward direction. Alternatively, the black ink particles 31 could be positively charged and the white ink particles 32 negatively charged, causing the black ink particles 31 to move in the direction of the electric field and the white ink particles 32 to move in the opposite direction of the electric field. The capsule shell 33 includes a thermally conductive layer made of a transparent, insulating, and thermally conductive material, such as a resin material containing aluminum nitride or boron nitride, with a volume resistivity > 10. 8 The dielectric strength is >5kV / mm, effectively preventing short circuits; the light transmittance is >95%, which has virtually no impact on the light transmission performance of the capsule shell 33. For example, a layer of aluminum nitride or boron nitride resin material can be coated on the outer surface of the capsule shell 33 to form a thermally conductive layer; of course, the entire capsule shell 33 can also be made of a transparent insulating thermally conductive material, so that the entire capsule shell 33 is a thermally conductive layer.

[0041] On one side of the array substrate 20 facing the ink capsules 30, there are multiple pixel electrodes 21 distributed in an array. The pixel electrodes 21 correspond to the pixel units P one by one. On one side of the counter substrate 10 facing the ink capsules 30, there is a common electrode 13 that cooperates with the pixel electrodes 21. By controlling the voltage polarity on the pixel electrodes 21, the electric field direction between the pixel electrodes 21 and the common electrode 13 is controlled, so as to control the switching of the ink capsules 30 between the black state (light absorption state) and the reflection state. For example, if a 0V common voltage is applied to the common electrode 13, and a positive voltage is applied to the pixel electrode 21, the electric field direction between the pixel electrode 21 and the common electrode 13 is upward; if a negative voltage is applied to the pixel electrode 21, the electric field direction between the pixel electrode 21 and the common electrode 13 is downward. Among them, the common electrode 13 can be a planar electrode that covers the entire counter substrate 10; the common electrode 13 can also be a block electrode corresponding to the pixel unit P one by one, and then multiple block electrodes are connected together by wires and a common voltage is applied to them jointly.

[0042] A heating layer 50 is provided on the counter substrate 10 and / or the array substrate 20. The heating layer 50 is used to heat the electronic paper display. By heating the electronic paper display through the heating layer 50, and the capsule shell 33 includes a heat-conducting layer made of a transparent insulating heat-conducting material, so that the ink capsules 30 can quickly absorb heat and quickly warm up, reduce the viscosity coefficient of the liquid in the ink capsules 30, and increase the moving speed of the black ink particles 31 and the white ink particles 32 in the ink capsules 30, so as to improve the response speed when the picture is refreshed, avoid the problem of ghosting, and enhance the user experience.

[0043] In this embodiment, a heating layer 50 is provided on the counter substrate 10, and the heating layer 50 is provided in the non-display area at the edge of the electronic paper display. The heating layer 50 is made of metal, such as metals like copper (Cu), silver (Ag), chromium (Cr), molybdenum (Mo), aluminum (Al), titanium (Ti), manganese (Mn), nickel (Ni), etc. As Figure 2 shown, the heating layer 50 can be in a "匚" shape structure and located on three sides of the counter substrate 10; of course, as Figure 3 shown, the heating layer 50 can also be in a "口" shape structure and located on four sides of the counter substrate 10 to increase the heating performance. Since the heating layer 50 is made of a metal material, by providing the heating layer 50 in the non-display area at the edge of the electronic paper display, the interference to the electric field between the pixel electrodes 21 and the common electrode 13 can be reduced. Of course, in other embodiments, the heating layer 50 can also be provided on the array substrate 20, or heating layers 50 are provided on both the counter substrate 10 and the array substrate 20.

[0044] Furthermore, a baffle 40 is provided between the opposing substrate 10 and the array substrate 20. The baffle 40 divides the gap between the opposing substrate 10 and the array substrate 20 to form a plurality of receiving cavities 401. Each receiving cavity 401 corresponds to a pixel unit P, and the ink capsule 30 is disposed within the receiving cavity 401. Optionally, the baffle 40 is made of an insulating and thermally conductive material, such as a resin material containing aluminum nitride or boron nitride. Since light transmission is not required at the baffle 40, it can also be made of other opaque insulating and thermally conductive materials. The heating layer 50 is disposed on the side of the opposing substrate 10 closest to the ink capsule 30 and is in contact with the baffle 40, thereby improving the heating speed.

[0045] The opposing substrate 10 and the array substrate 20 have an insulating layer on the side facing the ink capsule 30 to cover the common electrode 13 and the pixel electrode 21, thus preventing short circuits. Optionally, the insulating layers on the opposing substrate 10 and / or the array substrate 20 are made of a transparent insulating and thermally conductive material, such as a resin material containing aluminum nitride or boron nitride. Of course, a planarization layer can also be provided on the opposing substrate 10 and / or the array substrate 20 to perform planarization treatment on the substrate, and the planarization layer on the opposing substrate 10 and / or the array substrate 20 can also be made of a transparent insulating and thermally conductive material.

[0046] like Figure 4 As shown, the opposing substrate 10 is a color filter substrate. The opposing substrate 10 has a color resist layer 12 and a black matrix 11 with multiple color resist layers 12 spaced apart from each other. That is, the display area and the non-display area at the edge of the electronic paper display are both provided with black matrices 11. The multiple pixel units P include red pixel units, green pixel units, and blue pixel units. The color resist layer 12 includes a red color resist layer 12r, a green color resist layer 12g, and a blue color resist layer 12b. The red color resist layer 12r corresponds to the red pixel unit, the green color resist layer 12g corresponds to the green pixel unit, and the blue color resist layer 12b corresponds to the blue pixel unit. This allows the electronic paper display to achieve the display of various colors based on the color mixing principle of red / green / blue light. Specifically, a column of green pixel units, a column of blue pixel units, and a column of red pixel units are arranged alternately along the row direction. The peak transmittance of the red color resist layer 12r is around 650nm; the peak transmittance of the green color resist layer 12g is around 550nm, and the transmittance is above 20% in the wavelength range of 450nm to 620nm; the peak transmittance of the blue color resist layer 12b is around 460nm.

[0047] In this embodiment, the black matrix 11 and the color resist layer 12 are disposed on the side of the opposing substrate 10 facing the ink capsule 30, and the common electrode 13 is disposed on the side of the black matrix 11 and the color resist layer 12 facing the ink capsule 30. A planarization layer is provided between the black matrix 11 and the color resist layer 12 and the common electrode 13. The heating layer 50 is disposed on the side of the common electrode 13 facing the ink capsule 30, and an insulating layer is provided between the heating layer 50 and the common electrode 13. The planarization layer and / or the insulating layer on the opposing substrate 10 are made of a transparent insulating and thermally conductive material to increase thermal conductivity and enable all ink capsules 30 to be heated uniformly.

[0048] like Figure 5 As shown, the array substrate 20 is provided with multiple scan lines 101, multiple data lines 102, and multiple thin-film transistors 103. The multiple scan lines 101 and multiple data lines 102 are intersected and insulated from each other, defining multiple pixel units P. Each pixel unit P is provided with a pixel electrode 21 and a thin-film transistor 103. The pixel electrode 21 is electrically connected to the scan lines 101 and data lines 102 adjacent to the thin-film transistor 103 through the thin-film transistor 103. The thin-film transistor 103 includes a gate, an active layer, a drain, and a source. The gate and the scan lines 101 are located on the same layer and are electrically connected. The gate and the active layer are isolated by an insulating layer. The source is electrically connected to the data lines 102, and the drain is electrically connected to the pixel electrode 21 through a contact hole.

[0049] The opposing substrate 10 and the array substrate 20 can be made of transparent substrates such as glass, acrylic, and polycarbonate. The common electrode 13 and the pixel electrode 21 can be made of transparent electrodes such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0050] Figure 6 This is a schematic diagram of the electronic paper display in display mode according to Embodiment 1 of the present invention. The explanation will be based on the example of black ink particles 31 being negatively charged and white ink particles 32 being positively charged. Figure 6As shown, for a bright pixel unit P, a 0V common voltage is applied to the common electrode 13, and a positive voltage (e.g., +10V) is applied to the pixel electrode 21. The electric field between the pixel electrode 21 and the common electrode 13 is directed upwards. Black ink particles 31 move downwards, and white ink particles 32 move upwards and concentrate near the common electrode 13. Light incident on the e-ink screen 10 is reflected back by the white ink particles 32, thus making the corresponding pixel unit P appear bright. For a dark pixel unit P, a 0V common voltage is applied to the common electrode 13, and a negative voltage (e.g., -10V) is applied to the pixel electrode 21. The electric field between the pixel electrode 21 and the common electrode 13 is directed downwards. White ink particles 32 move downwards, and black ink particles 31 move upwards and concentrate near the common electrode 13. Light incident on the e-ink screen 10 is absorbed by the black ink particles 31, thus making the corresponding pixel unit P appear black. In this way, the corresponding pattern can be displayed by combining the bright state pixel unit P and the dark state pixel unit P.

[0051] This application also provides a control method for an electronic paper display, used to control the electronic paper display as described above. The control method includes: When the temperature of the electronic paper display is lower than a preset temperature, the heating layer 50 is used to heat the electronic paper display; when the temperature of the electronic paper display is greater than or equal to the preset temperature, the heating layer 50 is turned off. For example, when the temperature of the electronic paper display is detected to be lower than 5°C, a driving voltage is applied to the heating layer 50 to control the heating layer 50 to generate heat to heat the electronic paper display. When the temperature of the electronic paper display is detected to be greater than or equal to 5°C, the heating layer 50 is turned off to save power consumption.

[0052] [Example 2] Figure 7 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 2 of the present invention. Figure 8 This is a schematic diagram of the electronic paper display in display mode according to Embodiment 2 of the present invention. Figure 7 and Figure 8 As shown, the electronic paper display and control method provided in Embodiment 2 of the present invention are the same as those in Embodiment 1. Figures 1 to 6 The electronic paper display and control method are basically the same as those in other electronic paper displays, with the following differences: In this embodiment, the black matrix 11 corresponds to the non-display area at the edge of the electronic paper display, while the black matrix 11 is not required within the display area of ​​the electronic paper display. The gaps between adjacent color resist layers 12 within the display area can be filled by a planarization layer, or no gaps need to be provided between adjacent color resist layers 12 within the display area. By providing the black matrix 11 only in the non-display area at the edge of the electronic paper display, and eliminating the need for the black matrix 11 within the display area, the reflectivity of the electronic paper display can be increased, thereby improving display brightness.

[0053] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0054] [Example 3] Figure 9 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 3 of the present invention. Figure 10 This is a schematic diagram of the planar structure of the heating layer in Embodiment 3 of the present invention. Figure 11 This is a schematic diagram of the electronic paper display in display mode according to Embodiment 3 of the present invention. Figures 9 to 11 As shown, the electronic paper display and control method provided in Embodiment 3 of the present invention are the same as those in Embodiment 1. Figures 1 to 6 Example 2 Figure 7 and Figure 8 The electronic paper display and control method are basically the same as those in other electronic paper displays, with the following differences: In this embodiment, the heating layer 50 has a grid-like structure and spaces multiple pixel units P apart from each other. That is, the heating layer 50 is provided on both the display area and the non-display area at the edge of the electronic paper display, thereby increasing the heating effect and enabling all ink capsules 30 to be heated evenly. Since the heating layer 50 has a grid-like structure and is located between adjacent pixel units P, it has virtually no impact on the light transmittance of the electronic paper display.

[0055] Optionally, the heating layer 50 is disposed on the side of the common electrode 13 away from the ink capsule 30, thereby avoiding interference with the electric field between the pixel electrode 21 and the common electrode 13.

[0056] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be repeated here.

[0057] [Example 4] Figure 12 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 4 of the present invention. Figure 13 This is a schematic diagram of the electronic paper display in display mode according to Embodiment 4 of the present invention. Figure 12 and Figure 13As shown, the electronic paper display and control method provided in Embodiment 4 of the present invention are the same as those in Embodiment 1. Figures 1 to 6 Example 2 Figure 7 and Figure 8 The electronic paper display and control method are basically the same as those in other electronic paper displays, with the following differences: In this embodiment, the heating layer 50 is disposed on the side of the array substrate 20 closest to the ink capsule 30 and in contact with the barrier 40. Since the array substrate 20 does not have pixel electrodes 21 in the non-display area, by disposing the heating layer 50 on the array substrate 20 and in the non-display area at the edge, interference with the electric field between the pixel electrodes 21 and the common electrode 13 can be reduced.

[0058] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be repeated here.

[0059] [Example 5] Figure 14 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 5 of the present invention. Figure 15 This is a schematic diagram of the electronic paper display in display mode according to Embodiment 5 of the present invention. Figure 14 and Figure 15 As shown, the electronic paper display and control method provided in Embodiment 5 of the present invention are similar to those in Embodiment 4. Figure 12 and Figure 13 The electronic paper display and control method are basically the same as those in other electronic paper displays, with the following differences: In this embodiment, the heating layer 50 has a grid-like structure and spaces multiple pixel units P apart from each other. That is, the heating layer 50 is provided on both the display area and the non-display area at the edge of the electronic paper display, thereby increasing the heating effect and enabling all ink capsules 30 to be heated evenly. Since the heating layer 50 has a grid-like structure and is located between adjacent pixel units P, it has virtually no impact on the light transmittance of the electronic paper display.

[0060] Optionally, the heating layer 50 is disposed on the side of the array substrate 20 closest to the ink capsule 30 and in contact with the baffle 40, thereby increasing the contact area with the baffle 40 and improving the heating effect. Since the array substrate 20 does not have pixel electrodes 21 in the non-display area and at the baffle 40 position in the display area, interference to the electric field between the pixel electrodes 21 and the common electrode 13 can be reduced.

[0061] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 4, and will not be repeated here.

[0062] [Example 6] Figure 16This is a schematic diagram of the electronic paper display in its initial state in Embodiment Six of the present invention. Figure 17 This is a schematic diagram of the electronic paper display in display mode according to Embodiment Six of the present invention. Figure 16 and Figure 17 As shown, the electronic paper display and control method provided in Embodiment Six of the present invention are similar to those in Embodiment Four. Figure 12 and Figure 13 Example 5 Figure 14 and Figure 15 The electronic paper display and control method are basically the same as those in other electronic paper displays, with the following differences: In this embodiment, the heating layer 50 is disposed on the side of the pixel electrode 21 away from the ink capsule 30, thereby avoiding interference with the electric field between the pixel electrode 21 and the common electrode 13. Since the heating layer 50 is disposed on the side of the pixel electrode 21 away from the ink capsule 30, it does not interfere with the electric field between the pixel electrode 21 and the common electrode 13, nor does it affect the reflection effect of the ink capsule 30 on ambient light. Therefore, the heating layer 50 can be a planar electrode covering the entire surface of the array substrate 20 to increase the heating effect.

[0063] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiments 4 and 5, and will not be repeated here.

[0064] [Example 7] Figure 18 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 7 of the present invention. Figure 19 This is a schematic diagram of the planar structure of the heating layer in Embodiment 7 of the present invention. Figure 18 and Figure 19 As shown, the electronic paper display and control method provided in Embodiment 7 of the present invention are similar to those in Embodiment 4. Figure 12 and Figure 13 Example 5 Figure 14 and Figure 15 Example 6 Figure 16 and Figure 17 The electronic paper display and control method are basically the same as those in other electronic paper displays, with the following differences: In this embodiment, the heating layer 50 is disposed on the array substrate 20 and located on the side of the pixel electrode 21 facing the ink capsule 30. The heating layer 50 includes multiple heating strips, each corresponding to a column of pixel units P. Alternatively, each heating strip corresponds to a row of pixel units P. By configuring the heating layer 50 as multiple heating strips, with each heating strip corresponding to a column / or pixel unit P, the area of ​​the heating layer 50 can be increased to enhance the heating effect.

[0065] Furthermore, the heating layer 50 is an arc-shaped structure that conforms to the shape of the capsule shell 33. The heating layer 50 is disposed on the side of the array substrate 20 closest to the ink capsule 30 and in contact with the outer surface of the capsule shell 33. By directly contacting the heating layer 50 with the outer surface of the capsule shell 33, the heating effect on the ink capsule 33 can be improved. The heating layer 50 can be sprayed onto the surface of the capsule shell 33 and then connected via electrodes. Since the heating layer 50 is made of an opaque metallic material, it is disposed in the lower half of the capsule shell 33 to avoid affecting the reflection of light by the ink capsule 33. Of course, the heating layer 50 can also be made of a transparent heating material, allowing it to cover the entire outer surface of the capsule shell 33.

[0066] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiments 4, 5, and 6, and will not be described again here.

[0067] [Example 8] Figure 21 This is a schematic diagram of the electronic paper display in its initial state in Embodiment 8 of the present invention. Figure 22 This is a schematic diagram of the electronic paper display in display mode according to Embodiment 8 of the present invention. Figure 21 and Figure 22 As shown, the electronic paper display and control method provided in Embodiment 8 of the present invention are similar to those in Embodiment 7. Figure 19 and Figure 20 The electronic paper display and control method are basically the same as those in other electronic paper displays, with the following differences: In this embodiment, a spacer layer 22 is provided on the side of the array substrate 20 facing the ink capsule 30. The spacer layer 22 has a groove that matches the heating layer 50. The heating layer 50 is disposed in the groove and located between the spacer layer 22 and the capsule shell 33. By providing a spacer layer 22 on the side of the array substrate 20 facing the ink capsule 30 and providing a groove in the spacer layer 22, the heating layer 50 can be fabricated on the array substrate 20 first. After the ink capsule 30 is filled between the opposing substrate 10 and the array substrate 20, the heating layer 50 comes into contact with the outer surface of the capsule shell 33, thus avoiding the problem of poor contact between the heating layer 50 and the electrodes on the array substrate 20.

[0068] Alternatively, the spacer layer 22 can be made of a transparent, insulating, and thermally conductive material, such as a resin material containing aluminum nitride or boron nitride. Since the lower half of the ink capsule 30 is enclosed within the groove of the spacer layer 22, the heating effect on the ink capsule 30 can be increased.

[0069] Those skilled in the art should understand that the remaining structure and working principle of this embodiment are the same as those of Embodiment 7, and will not be repeated here.

[0070] In this document, the directional terms such as up, down, left, right, front, and back are defined according to the position of the structures in the accompanying drawings and the relative positions of the structures, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second," etc., used herein are only used for distinction in name and are not used to limit the number or order.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content without departing from the scope of the technical solution of the present invention, which are equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. An electronic paper display, characterized in that, The electronic paper display includes a counter substrate (10), an array substrate (20) disposed opposite to the counter substrate (10), and an ink capsule (30) disposed between the counter substrate (10) and the array substrate (20). The ink capsule (30) includes black ink particles (31), white ink particles (32), and a capsule shell (33). The black ink particles (31) and the white ink particles (32) have opposite polarities and are disposed within the capsule shell (33). The capsule shell (33) includes a thermally conductive layer made of a transparent insulating thermally conductive material. The array substrate (20) has a plurality of pixel electrodes (21) arranged in an array on the side facing the ink capsule (30). The counter substrate (10) has a common electrode (13) that cooperates with the pixel electrodes (21) on the side facing the ink capsule (30). A heating layer (50) is provided on the counter substrate (10) and / or the array substrate (20) for heating the electronic paper display.

2. The electronic paper display according to claim 1, characterized in that, The heating layer (50) is located in the non-display area at the edge of the electronic paper display.

3. The electronic paper display according to claim 1, characterized in that, The electronic paper display has a plurality of pixel units (P) arranged in an array, and the heating layer (50) has a grid structure that separates the plurality of pixel units (P) from each other.

4. The electronic paper display according to claim 1, characterized in that, The electronic paper display has a plurality of pixel units (P) arranged in an array. The heating layer (50) is disposed on the array substrate (20) and located on the side of the pixel electrode (21) away from the ink capsule (30). The heating layer (50) includes a plurality of heating strips, each of which corresponds to a column or a row of the pixel units (P).

5. The electronic paper display according to claim 1, characterized in that, A baffle (40) is provided between the opposing substrate (10) and the array substrate (20). The baffle (40) forms a plurality of receiving cavities (401) by separating the gap between the opposing substrate (10) and the array substrate (20). The ink capsule (30) is disposed in the receiving cavity (401).

6. The electronic paper display according to claim 5, characterized in that, The barrier (40) is made of an insulating and thermally conductive material, and the heating layer (50) is located on the side of the opposing substrate (10) and / or the array substrate (20) closest to the ink capsule (30) and is in contact with the barrier (40).

7. The electronic paper display according to claim 1, characterized in that, The heating layer (50) is an arc-shaped structure that matches the shape of the capsule shell (33). The heating layer (50) is located on the side of the array substrate (20) closest to the ink capsule (30) and is in contact with the outer surface of the capsule shell (33).

8. The electronic paper display according to claim 7, characterized in that, The array substrate (20) has a spacer layer (22) on the side facing the ink capsule (30). The spacer layer (22) has a groove that matches the heating layer (50). The heating layer (50) is located in the groove and between the spacer layer (22) and the capsule shell (33).

9. The electronic paper display according to any one of claims 1-8, characterized in that, The insulating layer and planarization layer on the opposing substrate (10) and / or the array substrate (20) are both made of transparent insulating and thermally conductive material.

10. A control method for an electronic paper display, characterized in that, The control method for controlling the electronic paper display as described in any one of claims 1-9 includes: When the temperature of the electronic paper display is lower than the preset temperature, the heating layer (50) is controlled to heat the electronic paper display. When the temperature of the electronic paper display is greater than or equal to the preset temperature, the heating of the heating layer (50) is turned off.

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