Electronic paper display device and electronic equipment

Abstract

The invention relates to the technical field of display, and discloses an electronic paper display device which specifically comprises a first substrate layer, a second substrate layer, a common electrode layer, an electrophoresis layer and a buffer layer, the first substrate layer comprises a top substrate, the second substrate layer comprises a bottom substrate and a pixel electrode layer, and the electrophoresis layer comprises electrophoresis liquid, electrophoresis particles and a supporting structure. The supporting structure divides the electrophoresis layer into a plurality of sub electrophoresis areas, the buffer layer is arranged between the electrophoresis layer and the first substrate layer, the buffer layer comprises a flexible substrate and a buffer structure, and orthographic projection patterns of the supporting structure and the buffer structure on the flexible substrate are at least partially overlapped. The first substrate layer can be prevented from being in direct contact with the electrophoresis layer when extruded by external force, buffering is achieved through the buffering layer, the overall structure of the electrophoresis layer is kept stable, and then the electrophoresis layer is kept in a stable display state. The invention further discloses electronic equipment comprising the electronic paper display device.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to an electronic paper display device and an electronic device. Background Art

[0002] Electronic paper has the characteristics of low energy consumption and high comfort, and has gradually become a popular display device. In the prior art, when an electronic paper display screen is pressed by an external force, the conductive particles will be squeezed by the upper substrate, so that the positions of the conductive particles of different colors will change, which will affect the display effect. At the same time, the existing electronic paper display screen usually has a cofferdam structure between the upper and lower substrates. This cofferdam structure has a certain elasticity and will separate from the upper substrate when pressed by an external force, causing some conductive particles to overflow.

[0003] Therefore, how to improve the stability of the overall structure of the electronic paper display when pressed by external force, as well as the stability of the overall display effect when pressed, has become a technical problem that urgently needs to be overcome in the industry. Summary of the invention

[0004] The present invention aims to solve at least one of the problems in the background technology. To this end, the present invention provides an electronic paper display device and an electronic device, wherein the electronic paper display device can effectively reduce the impact of external pressure on the overall structure and display effect.

[0005] According to an embodiment of a first aspect of the present invention, an electronic paper display device comprises a first substrate layer, a second substrate layer, a common electrode layer, an electrophoretic layer and a buffer layer, wherein the first substrate layer comprises a top substrate; the second substrate layer comprises a bottom substrate and a pixel electrode layer, wherein the pixel electrode layer is arranged on a side of the bottom substrate close to the first substrate layer; the common electrode layer is arranged between the first substrate layer and the second substrate layer; the electrophoretic layer is arranged between the first substrate layer and the second substrate layer, wherein the electrophoretic layer comprises an electrophoretic liquid, electrophoretic particles and a supporting structure, wherein the supporting structure divides the electrophoretic layer into a plurality of sub-electrophoretic regions, wherein the electrophoretic liquid and the electrophoretic particles are filled in the plurality of sub-electrophoretic regions; the buffer layer is arranged between the electrophoretic layer and the first substrate layer, wherein the buffer layer comprises a flexible substrate and a buffer structure, wherein the buffer structure is arranged on a side of the flexible substrate close to the first substrate layer, wherein the top of the supporting structure abuts against a side of the flexible substrate close to the second substrate layer, and wherein the orthographic projection patterns of the supporting structure and the buffer structure on the flexible substrate at least partially overlap.

[0006] The electronic paper display device in this embodiment, by providing a buffer layer between the first substrate layer and the electrophoretic layer, can prevent the first substrate layer from directly contacting the electrophoretic layer when being squeezed by external force, and achieve a buffering effect with the help of the buffer layer, so that the overall structure of the electrophoretic layer remains stable, thereby allowing the electrophoretic layer to maintain a stable display state.

[0007] According to another embodiment of the present invention, the pixel electrode layer includes a plurality of sub-pixel electrodes separated from each other, and a gap exists between two adjacent sub-pixel electrodes.

[0008] According to another embodiment of the present invention, the support structure includes a plurality of support retaining walls, and the bottoms of the plurality of support retaining walls are arranged on the gap and / or the sub-pixel electrode.

[0009] According to another embodiment of the present invention, the buffer structure includes a plurality of buffer retaining walls, and an orthographic projection pattern of each of the buffer retaining walls on the flexible substrate at least partially overlaps with an orthographic projection pattern of the supporting retaining wall on the flexible substrate.

[0010] According to another embodiment of the present invention, the buffer structure includes a plurality of buffer columns, and an orthographic projection pattern of each buffer column on the flexible substrate at least partially overlaps with an orthographic projection pattern of the supporting retaining wall on the flexible substrate.

[0011] According to another embodiment of the present invention, the height of the support structure is in the range of 4-30 μm.

[0012] According to another embodiment of the present invention, the height of the buffer structure is in the range of 2-20 μm.

[0013] According to another embodiment of the present invention, the common electrode layer is disposed on a surface of the top substrate on one side close to the second substrate layer.

[0014] According to another embodiment of the present invention, the flexible substrate is at least one of PET, CPI, and COP.

[0015] An electronic device according to an embodiment of a second aspect of the present invention includes any of the above-mentioned electronic paper display devices.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention discloses an electronic paper display device and an electronic device. The electronic paper display device comprises a first substrate layer, a second substrate layer, a common electrode layer, an electrophoretic layer and a buffer layer. The first substrate layer comprises a top substrate, the second substrate layer comprises a bottom substrate and a pixel electrode layer, the pixel electrode layer is arranged on a side of the bottom substrate close to the first substrate layer, the common electrode layer is arranged between the top substrate and the pixel electrode layer, the electrophoretic layer is arranged between the first substrate layer and the second substrate layer, the electrophoretic layer comprises an electrophoretic liquid, electrophoretic particles and a supporting structure, the supporting structure divides the electrophoretic layer into a plurality of sub-electrophoretic regions, the electrophoretic liquid and the electrophoretic particles are filled in the plurality of sub-electrophoretic regions The buffer layer is arranged between the electrophoretic layer and the first substrate layer, the buffer layer includes a flexible substrate and a buffer structure, the buffer structure is arranged on a side of the flexible substrate close to the first substrate layer, the top of the support structure is in contact with a side of the flexible substrate close to the second substrate layer, and the positive projection patterns of the support structure and the buffer structure on the flexible substrate are at least partially overlapped. By arranging the buffer layer between the first substrate layer and the electrophoretic layer, the first substrate layer can be prevented from directly contacting the electrophoretic layer when being squeezed by an external force, and a buffer effect is achieved with the help of the buffer layer, so that the overall structure of the electrophoretic layer remains stable, and the electrophoretic layer maintains a stable display state.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0020] Figure 1 A schematic diagram of an embodiment of an electronic paper display device provided in the present application;

[0021] Figure 2 For this application Figure 1 A schematic diagram of an embodiment of a cross section along line AA';

[0022] Figure 3 For this application Figure 1 A schematic diagram of an embodiment of a cross section along line BB';

[0023] Figure 4 For this application Figure 1 A schematic diagram of another embodiment of a cross section along line BB';

[0024] Figure 5 For this application Figure 1 A schematic diagram of another embodiment of a cross section along line BB';

[0025] Figure 6A schematic diagram of another embodiment of the electronic paper display device provided by the present application;

[0026] Figure 7 A schematic diagram of another embodiment of the electronic paper display device provided by the present application;

[0027] Figure 8 For this application Figure 7 A schematic diagram of an embodiment of a cross section along line CC';

[0028] Fig. 9 A schematic diagram of another embodiment of the electronic paper display device provided in the present application;

[0029] Fig.10 A cross-sectional schematic diagram of an embodiment of an electronic device provided by the present application;

[0030] The meanings of the marks in the figure are:

[0031] 10. Electronic equipment;

[0032] 100. Electronic paper display device;

[0033] 110, first substrate layer; 111, top substrate;

[0034] 120. Common electrode layer;

[0035] 130. buffer layer; 131. flexible substrate; 132. buffer structure; 1321. buffer retaining wall;

[0036] 1322, buffer column;

[0037] 140, electrophoretic layer; 141, electrophoretic liquid; 142, electrophoretic particles; 143, supporting structure;

[0038] 1431, support retaining wall;

[0039] 150, second substrate layer; 151, bottom substrate; 152, pixel electrode layer;

[0040] 1521. Sub-pixel electrode; 1522. Gap. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of the present invention, it is to be understood that a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] To illustrate the electronic paper display device and electronic device provided by the present application, the following is a detailed description in conjunction with the accompanying drawings and the textual description of the embodiments.

[0045] Reference below Figure 1-Figure 9 The electronic paper display device 100 according to the first embodiment of the present invention is described as follows. Figure 1-Figure 9As shown, the electronic paper display device 100 includes a first substrate layer 110, a second substrate layer 150, a common electrode layer 120, an electrophoretic layer 140 and a buffer layer 130. The first substrate layer 110 and the second substrate layer 150 are arranged correspondingly up and down, and the common electrode layer 120, the electrophoretic layer 140 and the buffer layer 130 are all arranged between the first substrate layer 110 and the second substrate layer 150. Specifically, the first substrate layer 110 includes a top substrate 111, and the second substrate layer 150 includes a bottom substrate 151 and a pixel electrode layer 152. The pixel electrode layer 152 is arranged on a side surface of the bottom substrate 151 close to the first substrate layer 110. The common electrode layer 120 and the pixel electrode layer 152 are arranged on the first substrate layer 110 and the second substrate layer 150. It can be understood that the common electrode layer 120 and the pixel electrode layer 152 are arranged correspondingly in the vertical direction so that an electric field is generated when power is turned on, thereby driving the electrophoretic layer 140 between the first substrate layer 110 and the second substrate layer 150. Further, the electrophoretic layer 140 includes an electrophoretic liquid 41, electrophoretic particles 142 and a support structure 143. The support structure 143 divides the electrophoretic layer 140 into a plurality of sub-electrophoretic regions (not shown in the figure). At the same time, the electrophoretic liquid 41 and the electrophoretic particles 142 are filled in the plurality of sub-electrophoretic regions. Further, a buffer layer 130 is arranged between the electrophoretic layer 140 and the first substrate layer 110. The buffer layer 130 is used to buffer the collision or extrusion from the first substrate layer 110. It is understood that when the first substrate layer 110 is collided or squeezed by an external force, the top substrate 111 is deformed inwardly to squeeze the electrophoretic layer 140, which will cause the support structure 143 to deform and thus cause the overall structure of the electrophoretic layer 140 to be unstable. The pressure will cause the electrophoretic particles 142 in the electrophoretic layer 140 to change in position or arrangement, thereby affecting the display effect. Therefore, by providing a buffer layer 130 between the first substrate layer 110 and the electrophoretic layer 140, it is possible to prevent the first substrate layer 110 from affecting the overall structure and display effect of the electrophoretic layer 140 when it is collided or squeezed by an external force. Specifically, the buffer layer 130 includes a flexible substrate 131 and a buffer structure 132. 32. The buffer structure 132 is arranged on a side of the flexible substrate 131 close to the first substrate layer 110, and the top of the support structure 143 is in contact with the side of the flexible substrate 131 close to the second substrate layer 150. The orthographic projection patterns of the support structure 143 and the buffer structure 132 on the flexible substrate 131 at least partially overlap, so that when the first substrate layer 110 is squeezed by an external force, the support structure 143 can transmit force with the buffer structure 132 in the vertical direction, thereby preventing the support structure 143 from directly squeezing the electrophoretic layer 140 in the vertical direction. Therefore, by arranging the buffer layer 130 between the first substrate layer 110 and the electrophoretic layer 140, it is possible to prevent the first substrate layer 110 from directly contacting the electrophoretic layer 140 when being squeezed by an external force.The buffer layer 130 achieves a buffering effect, so that the overall structure of the electrophoretic layer 140 remains stable, and the electrophoretic layer 140 maintains a stable display state.

[0046] It should be noted that the buffer structure 132 can be a wall structure connected end to end. In this case, the buffer structure 132 divides the buffer layer 130 into a plurality of closed areas. By setting the buffer structure 132 as a wall structure connected end to end, the overall impact resistance of the buffer structure 132 can be increased, so that the collision or extrusion force from the first substrate layer 110 can be better buffered. It can be understood that the buffer structure 132 can also be a structure with a plurality of openings on the wall structure connected end to end. In this case, the buffer structure 132 divides the buffer layer 130 into a plurality of semi-enclosed areas. Furthermore, the plurality of openings can be completely identical or partially identical, and the plurality of openings can be evenly distributed on the flexible substrate 131, or some of the openings can be evenly distributed on the flexible substrate 131, and the rest can be randomly arranged on the flexible substrate 131, or all of the plurality of openings can be randomly arranged on the flexible substrate 131.

[0047] It should be noted that the buffer structure 132 divides the buffer layer 130 into a plurality of closed areas of uniform size. It can be understood that by dividing the buffer layer 130 into a plurality of closed areas of the same size, the buffer layer 130 has the same buffering effect in different areas, thereby increasing the overall impact resistance. Alternatively, the buffer structure 132 divides the buffer layer 130 into a plurality of closed areas, some of which are of the same size and the rest are of different sizes. Alternatively, the buffer structure 132 divides the buffer layer 130 into a plurality of closed areas of different sizes.

[0048] It should be noted that the buffer layer 130 can also be divided into a plurality of semi-enclosed areas of uniform size by the buffer structure 132. It can be understood that by dividing the buffer layer 130 into a plurality of semi-enclosed areas of the same size, the buffer layer 130 has the same buffering effect in different areas, thereby increasing the overall impact resistance. Alternatively, the buffer structure 132 divides the buffer layer 130 into a plurality of semi-enclosed areas, some of which are of the same size and the rest are of different sizes. Alternatively, the buffer structure 132 divides the buffer layer 130 into a plurality of semi-enclosed areas of different sizes.

[0049] It should be noted that the buffer structure 132 can be a columnar structure separated from each other. It can be understood that the multiple columnar structures of the buffer structure 132 at least partially overlap with the orthographic projection pattern of the support structure 143 on the flexible substrate 131 in the orthographic projection direction of the flexible substrate 131, thereby ensuring that in the vertical direction, the buffer structure 132 can transfer the collision or extrusion force to the structural support structure 143, thereby avoiding transferring the collision or extrusion force to the electrophoretic liquid 41 or the electrophoretic particles 142.

[0050] It should be noted that the multiple sub-electrophoretic areas can be closed areas, or the multiple sub-electrophoretic areas can be partially closed areas and partially semi-closed areas. It can be understood that the semi-closed area means that the electrophoretic fluid 41 and the electrophoretic particles 142 in the area can flow out of the semi-closed area, but the outflowing electrophoretic fluid 41 and the electrophoretic particles 142 respectively occupy less than half of the total amount of the electrophoretic fluid 41 and the electrophoretic particles 142 in the area.

[0051] According to one embodiment of the present invention, Figure 1 and Figure 2 As shown, the pixel electrode layer 152 includes a plurality of sub-pixel electrodes 1521 separated from each other, and a gap 1522 is provided between any two adjacent sub-pixel electrodes 1521. Furthermore, any two adjacent sub-pixel electrodes 1521 have the same gap 1522, so that the pixel electrode layer 152 has the same effect on driving the electrophoretic layer 140 in various regions.

[0052] It should be noted that, in some other embodiments, some adjacent sub-pixel electrodes 1521 have the same gap 1522, for example, two sub-pixel electrodes 1521 inside the pixel electrode layer 152 have the same gap 1522, and at the same time, the gap 1522 between the two outermost sub-pixel electrodes 1521 in the pixel electrode layer 152 may be different from the gap 1522 between the two inner sub-pixel electrodes 1521.

[0053] It should be noted that, in some other embodiments, there are different gaps 1522 between some adjacent sub-pixel electrodes 1521. For example, the gap 1522 between two sub-pixel electrodes 1521 in the pixel electrode layer 152 may present an arithmetic progression from the inside to the outside. For example, the gap 1522 between the two sub-pixel electrodes 1521 in the center of the pixel electrode layer 152 is 1 μm, and from the center to the outside, the gap 1522 between two adjacent sub-pixel electrodes 1521 is 1.1 μm, 1.2 μm, 1.3 μm, 1.4 μm, respectively, until the gap 1522 between the outermost sub-pixel electrode 1521 and its adjacent sub-pixel electrode 1521 is 3 μm.

[0054] According to one embodiment of the present invention, Figure 2 As shown, the support structure 143 includes a plurality of support retaining walls 1431, and the bottoms of the plurality of support retaining walls 1431 are at least partially disposed on the gap 1522, or, the bottoms of the plurality of support retaining walls 1431 are at least partially disposed on the sub-pixel electrode 1521. Furthermore, the plurality of support retaining walls 1431 are evenly distributed on the pixel electrode layer 152, so that sub-electrophoretic regions of the same size are formed between the plurality of support retaining walls 1431, so that the electrophoretic liquid 41 and the electrophoretic particles 142 in each sub-electrophoretic region have the same volume and quantity.

[0055] It should be noted that multiple supporting retaining walls 1431 can be connected end to end to define multiple closed sub-electrophoresis areas, or some supporting retaining walls 1431 can be connected end to end to define partially closed sub-electrophoresis areas, and other parts of the sub-electrophoresis areas can be semi-closed or unclosed areas.

[0056] It should be noted that the multiple supporting walls 1431 can all be set on the gaps 1522 between the sub-pixel electrodes 1521. In this case, the multiple supporting walls 1431 will not block the area between the sub-pixel electrodes 1521 and the common electrode layer 120, avoiding affecting the electric field.

[0057] It should be noted that the plurality of supporting retaining walls 1431 may all be arranged on the gaps 1522 between the sub-pixel electrodes 1521, and may be partially arranged on the sub-pixel electrodes 1521. Furthermore, at this time, the plurality of supporting retaining walls 1431 arranged on the sub-pixel electrodes 1521 divide the sub-pixel electrodes 1521 into the same area. It can be understood that when the sub-pixel electrode 1521 has a larger area, the sub-pixel electrode 1521 may be arranged into a plurality of small area regions of the same size by setting supporting retaining walls 1431 on the sub-pixel electrode 1521.

[0058] It should be noted that, in other embodiments, the support structure 143 includes a plurality of support columns that are not connected to each other, and the bottoms of the plurality of support columns are at least partially disposed on the gap 1522 or the sub-pixel electrode 1521. It can be understood that at this time, the sub-electrophoretic area is a semi-enclosed area or an unenclosed area, and at this time, the electrophoretic fluid 41 and the electrophoretic particles 142 in the sub-electrophoretic area can flow freely.

[0059] According to one embodiment of the present invention, Figure 1 , Figure 3 and Figure 4As shown, the buffer structure 132 includes a plurality of buffer retaining walls 1321, and the orthographic projection pattern of each buffer retaining wall 1321 on the flexible substrate 131 at least partially overlaps with the orthographic projection pattern of the supporting retaining wall 1431 on the flexible substrate 131, thereby ensuring that in the vertical direction, the buffer structure 132 can transfer the collision or extrusion force received to the structural support structure 143, thereby avoiding transferring the collision or extrusion force to the electrophoretic liquid 41 or the electrophoretic particles 142. Furthermore, the orthographic projection patterns of the plurality of buffer retaining walls 1321 on the flexible substrate 131 are evenly distributed patterns, so that the buffer structure 132 has the same buffering effect in different areas.

[0060] According to one embodiment of the present invention, Figure 1 and Figure 5 As shown, the buffer structure 132 includes a plurality of buffer columns 1322, and the orthographic projection pattern of each buffer column 1322 on the flexible substrate 131 at least partially overlaps with the orthographic projection pattern of the supporting retaining wall 1431 on the flexible substrate 131, thereby ensuring that in the vertical direction, the buffer structure 132 can transfer the collision or extrusion force to the supporting structure 143, thereby avoiding transferring the collision or extrusion force to the electrophoretic liquid 41 or the electrophoretic particles 142. Furthermore, the orthographic projection patterns of the plurality of buffer columns 1322 on the flexible substrate 131 are evenly distributed patterns, so that the buffer structure 132 has the same buffering effect in different regions.

[0061] It should be noted that, in some embodiments, Figure 3 As shown, the orthographic projection patterns of the plurality of buffer walls 1321 on the flexible substrate 131 may all overlap with the orthographic projection patterns of the support structure 143 on the flexible substrate 131, or, in some other embodiments, such as Figure 4-Figure 6 As shown, the orthographic projection patterns of multiple buffer retaining walls 1321 or buffer columns 1322 on the flexible substrate 131 can all overlap with the orthographic projection patterns of the supporting structure 143 on the flexible substrate 131. It can be understood that as long as the orthographic projection patterns of all individually arranged buffer retaining walls 1321 or buffer columns 1322 on the flexible substrate 131 can all overlap with the orthographic projection patterns of the supporting structure 143 on the flexible substrate 131, the specific shape and specific setting method of the buffer retaining walls 1321 or buffer columns 1322 are not specifically limited herein.

[0062] It should be noted that, in some other embodiments, the buffer structure 132 includes a plurality of buffer walls 1321 and buffer columns 1322. In this case, the plurality of buffer walls 1321 and buffer columns 1322 can be evenly distributed on the flexible substrate 131, so that the buffer structure 132 has the same buffering effect in different areas.

[0063] According to one embodiment of the present invention, Figure 8 As shown, the height range of the support structure 143 is 4-30 μm. It can be understood that the height of the support structure 143 refers to the height difference between the flexible substrate 131 and the pixel electrode or the gap 1522 between the pixel electrodes, that is, the height range of the electrophoretic layer 140 is 4-30 μm, for example, the height of the support structure 143 or the electrophoretic layer 140 is 4 μm, or the height of the support structure 143 or the electrophoretic layer 140 is 8 μm, or the height of the support structure 143 or the electrophoretic layer 140 is 10 μm, or the height of the support structure 143 or the electrophoretic layer 140 is 15 μm, or the height of the support structure 143 or the electrophoretic layer 140 is 14 μm. 0 is 20μm, or the height of the support structure 143 or the electrophoretic layer 140 is 25μm, or the height of the support structure 143 or the electrophoretic layer 140 is 30μm. It can be understood that the height of the support structure 143 or the electrophoretic layer 140 cannot be too low, so as to ensure that the electrophoretic liquid 41 and the electrophoretic particles 142 inside the electrophoretic layer 140 have a certain number to meet the requirements of different displays. At the same time, the height of the support structure 143 or the electrophoretic layer 140 cannot be too high, so as to ensure the electric field strength between the pixel electrode layer 152 and the common electrode layer 120. Preferably, the height of the support structure 143 or the electrophoretic layer 140 is 20-30μm.

[0064] According to one embodiment of the present invention, Figure 7-Figure 9 As shown, the height range of the buffer structure 132 is 2-20 μm. It can be understood that the height of the buffer structure 132 refers to the height difference between the flexible substrate 131 and the top substrate 111. It can be understood that the distance between the flexible substrate 131 and the top substrate 111 cannot be too small, so as to ensure that the buffer structure 132 can play a certain buffering effect. At the same time, the distance between the flexible substrate 131 and the top substrate 111 cannot be too large, so as to avoid large losses of light when passing through the flexible substrate 131 and the top substrate 111. Preferably, the height of the supporting structure 143 or the electrophoretic layer 140 is 2-10 μm. Further, the height of the buffer structure 132 is smaller than the height of the supporting structure 143, so as to ensure the overall display effect and avoid excessive light loss through the buffer layer 130.

[0065] According to one embodiment of the present invention, Figure 1 , Figure 6 and Figure 7 As shown, the common electrode layer 120 is arranged on the surface of the top substrate 111 close to the second substrate layer 150. It can be understood that by arranging the common electrode layer 120 on the top substrate 111, processing can be facilitated. During the manufacturing process, the common electrode layer 120 can be directly generated on the flat top substrate 111, thereby optimizing the overall production process.

[0066] It should be noted that, in other embodiments, Fig. 9 As shown, the common electrode layer 120 is disposed on the surface of the flexible substrate 131. It can be understood that by disposing the common electrode layer 120 on the surface of the flexible substrate 131, the distance between the common electrode layer 120 and the pixel electrode layer 152 is reduced, thereby enhancing the electric field strength and improving the effect of driving the electrophoretic layer 140 to display.

[0067] It should be noted that in this embodiment, the common electrode layer 120 is disposed on the surface of the flexible substrate 131 close to the second substrate layer 150 . In other embodiments, the common electrode layer 120 may also be disposed on the surface of the flexible substrate 131 away from the second substrate layer 150 .

[0068] According to one embodiment of the present invention, Figure 7 and Figure 8 As shown, the flexible substrate 131 can be polyethylene terephthalate (PET). PET has good mechanical properties, high impact strength, good folding resistance, oil resistance, fat resistance, dilute acid, dilute alkali resistance and most solvents. At the same time, PET has good heat aging resistance, is not easy to burn, and has the advantages of high transparency, UV blocking and good gloss. Alternatively, the flexible substrate 131 can be transparent polyimide (Colorless Polyimide, CPI). CPI has the characteristics of high insulation performance and is one of the organic polymer materials with the best comprehensive performance. Alternatively, the flexible substrate 131 can be cycloolefin polymer (COP). COP has the characteristics of high transparency, low birefringence, low water absorption, high rigidity, high heat resistance, good water vapor airtightness and the like.

[0069] It should be noted that, in the present embodiment, the flexible substrate 131 may be any one of PET, CPI and COP, or the flexible substrate 131 may be a combination of two of PET, CPI and COP, or the flexible substrate 131 may include PET, CPI and COP. Furthermore, the number of film layers of a single material in PET, CPI or COP in the flexible substrate 131 is not limited to one layer. For example, the flexible substrate 131 may include two PET layers.

[0070] It should be noted that, in other embodiments, the flexible substrate 131 may also be other flexible, transparent film layers with excellent insulation properties.

[0071] Reference below Fig.10 An electronic device 10 according to an embodiment of the second aspect of the present invention is described. Fig.10As shown, the electronic device 10 includes an electronic paper display device 100, the electronic paper display device 100 includes a first substrate layer 110, a second substrate layer 150, a common electrode layer 120, an electrophoretic layer 140 and a buffer layer 130, the first substrate layer 110 includes a top substrate 111, the second substrate layer 150 includes a bottom substrate 151 and a pixel electrode layer 152, the electrophoretic layer 140 includes an electrophoretic liquid 41, electrophoretic particles 142 and a supporting structure 143, the supporting structure 143 divides the electrophoretic layer 140 into a plurality of sub-electrophoretic regions, the buffer layer 130 is disposed between the electrophoretic layer 140 and the first substrate layer 110, and the buffer layer 130 is disposed between the electrophoretic layer 140 and the first substrate layer 110. 130 includes a flexible substrate 131 and a buffer structure 132. The orthographic projection patterns of the support structure 143 and the buffer structure 132 on the flexible substrate 131 at least partially overlap. By arranging the buffer layer 130 between the first substrate layer 110 and the electrophoretic layer 140, it is possible to prevent the first substrate layer 110 from directly contacting the electrophoretic layer 140 when being squeezed by an external force. With the help of the buffer layer 130, buffering is achieved, so that the overall structure of the electrophoretic layer 140 remains stable, and then the electrophoretic layer 140 maintains a stable display state, so that the electronic paper display device 100 in the electronic device 10 has a good display effect.

[0072] It should be noted that the electronic device 10 may be an electronic paper tablet, an electronic book reader, an electronic shelf label, a digital license plate, a smart electronic whiteboard, an electronic billboard, or other electronic devices with an electronic paper display device 100 .

[0073] The electronic paper display device and electronic device provided above for this application are preferred embodiments and should not be construed as limiting the scope of protection of the present application. Those skilled in the art should be aware that various improvements or replacements may be made without departing from the concept of this application, and all improvements or replacements should be within the scope of protection of the present application, that is, the scope of protection of the present application should be based on the claims.

[0074] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

Claims

1. An electronic paper display device, characterized in that: include: a first substrate layer, the first substrate layer comprising a top substrate; a second substrate layer, the second substrate layer comprising a base substrate and a pixel electrode layer, the pixel electrode layer being arranged on a side of the base substrate close to the first substrate layer; A common electrode layer, wherein the common electrode layer is disposed between the first substrate layer and the second substrate layer; an electrophoretic layer, the electrophoretic layer being disposed between the first substrate layer and the second substrate layer, the electrophoretic layer comprising an electrophoretic liquid, electrophoretic particles and a supporting structure, the supporting structure dividing the electrophoretic layer into a plurality of sub-electrophoretic regions, the electrophoretic liquid and the electrophoretic particles being filled in the plurality of sub-electrophoretic regions; A buffer layer, wherein the buffer layer is arranged between the electrophoretic layer and the first substrate layer, the buffer layer includes a flexible substrate and a buffer structure, the buffer structure is arranged on a side of the flexible substrate close to the first substrate layer, the top of the support structure is in contact with a side of the flexible substrate close to the second substrate layer, and the orthographic projection patterns of the support structure and the buffer structure on the flexible substrate at least partially overlap.

2. The electronic paper display device according to claim 1, wherein: The pixel electrode layer includes a plurality of sub-pixel electrodes separated from each other, and a gap is provided between two adjacent sub-pixel electrodes.

3. The electronic paper display device according to claim 2, characterized in that: The support structure includes a plurality of support retaining walls, and the bottoms of the plurality of support retaining walls are arranged on the gap and / or the sub-pixel electrode.

4. The electronic paper display device according to claim 3, characterized in that: The buffer structure comprises a plurality of buffer retaining walls, and an orthographic projection pattern of each of the buffer retaining walls on the flexible substrate at least partially overlaps with an orthographic projection pattern of the supporting retaining wall on the flexible substrate.

5. The electronic paper display device according to claim 3, characterized in that: The buffer structure comprises a plurality of buffer columns, and an orthographic projection pattern of each buffer column on the flexible substrate at least partially overlaps with an orthographic projection pattern of the supporting retaining wall on the flexible substrate.

6. The electronic paper display device according to claim 1, wherein: The height of the support structure ranges from 4 to 30 μm.

7. The electronic paper display device according to claim 1, characterized in that: The height of the buffer structure is in the range of 2-20 μm.

8. The electronic paper display device according to claim 1, wherein: The common electrode layer is disposed on a surface of the top substrate close to the second substrate layer.

9. The electronic paper display device according to claim 1, wherein: The flexible substrate is at least one of PET, CPI and COP.

10. An electronic device, characterized in that: The electronic paper display device comprises any one of claims 1-9.

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