Electronic paper screens, electronic paper displays, and electronic terminals

Abstract

The present invention relates to an electronic paper screen, an electronic paper display, and an electronic terminal, and concerns the technology of electronic display. The electronic paper screen includes a thin-film transistor substrate (1), an electronic paper film (2), and electrical connection points (14). The thin-film transistor substrate (1) has a polygonal display area (11), with empty areas reserved in advance at at least one vertex position of the display area (11), each empty area being demarcated by a first area boundary (8). The electronic paper film (2) facing the location of the empty areas is provided with electrical connection points (14) for connecting electrodes on the thin-film transistor substrate (1) and electrodes on the electronic paper film (2). The outer contour of the electrical connection points (14) forms a second area boundary (9) in the plane of the thin-film transistor substrate (1), and the portion of the second area boundary (9) corresponding to the first area boundary (8) is an equidistant portion, where the minimum distance from any point in the equidistant portion to the first area boundary (8) is equal. By limiting the minimum distance to be equal, the loss of display area of ​​the display area (11) is reduced.

Description

Technical Field

[0001] [Related Application] This application claims the priority of the Chinese patent application with the application number 202320527620.5 filed on March 13, 2023, and incorporates the content disclosed in the above patent application as part of this application.

[0002] This application relates to the technical field of electronic displays, particularly to electronic paper screens.

Background Art

[0003] An electronic paper screen is a display screen manufactured using electrophoretic display technology, and achieves the effect of displaying an image by applying a driving voltage to each pixel point by a control circuit on a thin-film transistor substrate.

[0004] As shown in Figure 1, the display area 11 (abbreviated as AA area) of a conventional electronic paper screen is rectangular, and a transition area 12 (abbreviated as Border area) can be further installed outside the display area 11, encircling the display area 11. In order to drive the electrodes (e.g., VCOM ITO electrodes) on the electronic paper film 2 (abbreviated as FPL), it is necessary to reserve ear holes 13 in a portion of the electronic paper film 2 that extends outside the electronic paper film 2, install electrical connection points 14 (e.g., silver paste connection points) at the positions of the ear holes 13, and then connect the electrodes on the thin-film transistor substrate 1 (e.g., VCOM electrodes) and the electrodes on the electronic paper film 2 (e.g., VCOM ITO electrodes) by applying silver paste. However, the presence of the ear holes 13 deforms the external shape of the electronic paper film 2 and the protective film 3 (abbreviated as PS, which is attached to the electronic paper film), and increases the size of the thin-film transistor substrate 1, electronic paper film 2, and protective film 3. This not only widens the bezel of the electronic paper screen and reduces the screen occupancy rate, but also reduces the number of thin-film transistor substrates 1, electronic paper films 2, and protective films 3 cut out for the electronic paper screen (in the raw material production process, in order to improve efficiency and reduce costs, the thin-film transistor substrates 1, electronic paper films 2, and protective films 3 are all cut in the form of a large sheet or mother sheet, and multiple small sheets can be distributed from one large sheet or mother sheet, one of which is the size and shape actually required for one electronic paper screen, and the number of cuts is the largest distribution and number of cut small sheets from the large sheet), and increases material costs.

[0005] To solve the above-mentioned problem caused by the ear holes, as shown in Figure 2, by designing the display area 11 to have its corners cut out, corner cutout processing is performed on one or more of the four corners of the display area 11, and at the same time, electrical connection points 14 are provided at positions corresponding to one or more of the corner cutouts on the electronic paper film 2, thereby eliminating the ear holes 13.

[0006] The corner-cut design solved the problems of deformed electronic paper film shape due to the presence of ear holes, reduced screen coverage of the electronic paper screen, and increased costs. However, it also resulted in a loss of a certain amount of display area. Therefore, to address this situation, it is necessary to optimize and improve this corner-cut design in order to reduce the loss of display area. [Overview of the project]

[0007] This application aims to provide an electronic paper screen, electronic paper display, and electronic terminal that reduce the loss of display area in the display region by optimizing the corner cutout design.

[0008] To achieve the above objective, this application employs the following technical solutions.

[0009] An embodiment of the first aspect of this application provides an electronic paper screen comprising a thin-film transistor substrate having a polygonal display area, with empty areas reserved in advance at at least one vertex position of the display area, an electronic paper film, and electrical connection points, wherein each empty area is demarcated by a first region boundary, the electronic paper film facing the position of the empty area is provided with the electrical connection points for connecting electrodes on the thin-film transistor substrate and electrodes on the electronic paper film, the outer contour of the electrical connection points forms a second region boundary in the plane of the thin-film transistor substrate, the portion of the second region boundary corresponding to the first region boundary is an equidistant portion, and the minimum distance from any point in the equidistant portion to the first region boundary is equal, providing an electronic paper screen.

[0010] Furthermore, the first region boundary is arc-shaped, and the equidistant portions are provided on corresponding arc segments.

[0011] Furthermore, the second region boundary is a closed figure consisting of a curved segment and the circular arc segment, and the radians of the curved segment and the circular arc segment are the same or different.

[0012] Furthermore, the boundary of the second region is a closed figure consisting of a straight line segment and the circular arc segment.

[0013] Furthermore, the first region boundary is either linear or polylinear, the equidistant portion is a linear segment provided in correspondence with the linear shape, or the equidistant portion is a linear segment structure provided in correspondence with the polylinear shape, in which multiple linear segments are sequentially connected.

[0014] Furthermore, the boundary of the second region is a linear segment or a polygon having the linear segment structure.

[0015] Furthermore, the boundary of the second region is a closed figure consisting of the straight line segment and the curved segment, or a closed figure consisting of the straight line segment structure and the curved segment.

[0016] Furthermore, the first region boundary is a mixed shape consisting of a straight line and an arc, or a mixed shape consisting of a broken line and an arc, the equidistant portion is a mixed line segment provided in correspondence with the mixed shape, and the second region boundary is a closed figure having the mixed line segment.

[0017] Furthermore, because the second region boundary is located inside the electronic paper film, a gap exists between the second region boundary and the boundary of the electronic paper film, thereby preventing leakage of electrical connection points to the outside of the electronic paper film due to process variations.

[0018] Furthermore, since the second region boundary is a closed figure formed based on the boundary of the electronic paper film, a portion of the boundary of the electronic paper film constitutes a portion of the second region boundary, thereby minimizing the display area lost due to the display region.

[0019] Furthermore, the minimum distance between the equidistant portion and the first region boundary is L1, with a range of values ​​of 0.5 mm ≤ L1 ≤ 3 mm, the minimum distance between the second region boundary and the boundary of the electronic paper film is L2, with a range of values ​​of 0 mm ≤ L2 ≤ 1 mm, and the distance of L1 is set to isolate the electrical connection point from the display area, thereby preventing electronic ink from entering the display area during use due to edge damage caused by laser cutting at the electrical connection point.

[0020] Furthermore, a transition region is provided around the display region, the minimum width of the transition region is L3, the range of L3 is 0mm ≤ L3 ≤ 1mm, the minimum distance between the equidistant portion and the transition region is L4, the range of L4 is 0.3mm ≤ L4 ≤ 2mm, and it is ensured that 0.5mm ≤ L3 + L4 ≤ 3mm. The distance of L4 is set to prevent misconnection between the electrical connection point and the electrodes of the transition region by isolating the electrical connection point and the transition region, and to prevent the electronic ink from entering the transition region during use due to edge damage caused by laser cutting at the electrical connection point of the electronic paper film. The distance of L3 + L4 is set to prevent the electronic ink from entering the display region during use due to edge damage caused by laser cutting at the electrical connection point of the electronic paper film by isolating the electrical connection point and the display region.

[0021] Furthermore, the electronic paper screen further includes a protective film attached to the electronic paper film, wherein the minimum distance between the boundary of the electronic paper film and the boundary of the protective film is L5, and the range of L5 is 0.5 mm ≤ L5 ≤ 2 mm, and the distance L5 is set for a sealing connection member which includes a forehead adhesive that prevents water vapor from entering the electronic paper film by bonding the edge of the protective film and the thin-film transistor substrate to each other.

[0022] A second embodiment of this application provides an electronic paper display including the electronic paper screen described above.

[0023] An embodiment of the third aspect of the present application provides an electronic terminal including the above electronic paper display.

[0024] The following need to be particularly explained in this specification.

[0025] The above-mentioned "electrical connection point" can be electrically connected from the function. For example, the electrode on the thin film transistor substrate and the electrode on the electronic paper film can be electrically connected, and the electrical connection point is not necessarily limited to a specific shape such as "point" shape.

[0026] The "corresponding part" in the "part corresponding to the first region boundary at the second region boundary" means that both endpoints of the second region boundary are connected to obtain a first connection line, a second connection line perpendicular to the first connection line is drawn through the midpoint of the first connection line, a first radiation line is drawn from an endpoint at one end of the first region boundary in the direction of the location of the second region boundary, there is one first intersection point closest to the endpoint of the first region boundary on the first radiation line and the second region boundary, and when a second radiation line corresponding to the first radiation line is provided with the second connection line as the axis of symmetry, similarly, there is also one second intersection point closest to the endpoint of the first region boundary on the second radiation line and the second region boundary, and the part on the second region boundary facing the direction of the first region boundary and located between the first intersection point and the second intersection point is the corresponding part, that is, the equidistant part.

[0027] The beneficial effects of the present application are as follows. 1) The part corresponding to the first region boundary at the second region boundary is an equidistant part, and the minimum distance from any point in the equidistant part to the first region boundary is equal, thereby reducing the loss of the display area of the display region. 2) By changing the position of the second region boundary with respect to the electronic paper film, the loss of the display area of the display region is reduced. 3) By limiting the positions, dimensions, distances, etc. of multiple structures, the loss of the display area of the display region is reduced.

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings that need to be used in the following description of the embodiments or the prior art will be briefly described. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, based on these drawings, other drawings can also be obtained on the premise of no creative labor. In the drawings,

Brief Description of the Drawings

[0029] [Figure 1] It is a schematic plan view of the planar structure of an electronic paper screen provided with ear holes. [Figure 2] It is a schematic plan view of the planar structure of an electronic paper screen with ear holes removed. [Figure 3a1] It is a schematic plan view of the planar structure of an electronic paper screen according to an embodiment of the present application. [Figure 3a2] It is an enlarged schematic view of a partial structure of FIG. 3a1. [Figure 3b1] It is a schematic plan view of the planar structure of an electronic paper screen according to an embodiment of the present application. [Figure 3b2] It is an enlarged schematic view of a partial structure of FIG. 3b1. [Figure 4a] It is a schematic view of one type of installation of the empty area according to an embodiment of the present application. [Figure 4b] It is a schematic view of one type of installation of the empty area according to an embodiment of the present application. [Figure 4c] It is a schematic view of one type of installation of the empty area according to an embodiment of the present application. [Figure 4d] It is a schematic view of one type of installation of the empty area according to an embodiment of the present application. [Figure 5a1] It is a schematic view of one type of shape of the first region boundary and the second region boundary according to Embodiment 1 of the present application. [Figure 5a2] It is an enlarged schematic view of a partial structure of FIG. 5a1. [Figure 5b1] It is a schematic view of one type of shape of the first region boundary and the second region boundary according to Embodiment 1 of the present application. [Figure 5b2] It is an enlarged schematic view of a partial structure of FIG. 5b1. [Figure 5c1] This is a schematic diagram of one type of shape of the first and second region boundaries according to Embodiment 1 of this application. [Figure 5c2] This is an enlarged schematic diagram of a part of the structure shown in Figure 5c1. [Figure 5d1] This is a schematic diagram of one type of shape of the first and second region boundaries according to Embodiment 1 of this application. [Figure 5d2] This is an enlarged schematic diagram of a part of the structure shown in Figure 5d1. [Figure 6a1] This is a schematic diagram of one type of shape of the first and second region boundaries according to Embodiment 2 of this application. [Figure 6a2] This is an enlarged schematic diagram of a part of the structure shown in Figure 6a1. [Figure 6b1] This is a schematic diagram of one type of shape of the first and second region boundaries according to Embodiment 2 of this application. [Figure 6b2] This is an enlarged schematic diagram of a part of the structure shown in Figure 6b1. [Figure 6c1] This is a schematic diagram of one type of shape of the first and second region boundaries according to Embodiment 2 of this application. [Figure 6c2] This is an enlarged schematic diagram of a part of the structure shown in Figure 6c1. [Figure 6d1] This is a schematic diagram of one type of shape of the first and second region boundaries according to Embodiment 2 of this application. [Figure 6d2] This is an enlarged schematic diagram of a part of the structure shown in Figure 6d1. [Figure 7a] This is a schematic diagram of one type of shape of the first and second region boundaries according to Embodiment 3 of this application. [Figure 7b] This is an enlarged schematic diagram of a part of the structure of Figure 7a. [Figure 8] This is a cross-sectional view in the A-A' direction of Figure 7b relating to Embodiment 4 of this application. [Figure 9a] This is a schematic diagram of a structure in which a portion of the boundary of an electronic paper film according to Embodiment 5 of the present invention constitutes a portion of the second region boundary. [Figure 9b] Figure 9a is an enlarged schematic diagram of a part of the structure. [Figure 10] This is a cross-sectional view in the B-B' direction in Figure 9b. [Modes for carrying out the invention]

[0030] In the description of this application, any terms or positional relationships indicating direction are based on the directions or positional relationships shown in the drawings and are solely for the convenience and simplification of the description of this application. They do not indicate or imply that the devices or elements shown must have a specific direction, or that they must be configured and operated in a specific direction, and therefore should not be understood as limiting this application. The terms “first” and “second” are for illustrative purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of constituent elements shown. Thus, constituent elements limited to “first” and “second” may explicitly or implicitly include one or more such constituent elements. In the term “polygon,” “polygon” means three or more sides, and “multiple” and “multiple” both mean two or more.

[0031] The principles and features of this application will be described below with reference to the drawings. The embodiments described are for illustrative purposes only and do not limit the scope of this application. The drawings are all highly simplified and use inaccurate proportions, and are intended only to aid in a simple and clear explanation of the embodiments of this application.

[0032] Before describing the embodiments of this application, we will first briefly explain the overall structure of the electronic paper screen in order to make the innovative technical points of this application easier to understand.

[0033] As shown in Figures 3a1 and 3a2 or 3b1 and 3b2, the electronic paper screen includes a thin-film transistor substrate 1 (abbreviated as TFT substrate), an electronic paper film 2 (abbreviated as FPL), a protective film 3 (abbreviated as PS), a drive chip 5 (abbreviated as IC), and a flexible circuit board 6 (abbreviated as FPC).

[0034] The thin-film transistor substrate 1 includes a display area 11 (abbreviated as the AA area) and a non-display area (abbreviated as the non-AA area). In some products, a ring-shaped area of ​​a certain width is provided between the display area 11 and the non-display area, and this ring-shaped area is called a transition area 12 (abbreviated as the border area). The transition area 12 is used to separate the display area 11 and the non-display area, and the minimum distance from any point on the boundary of the transition area 12 to the first area boundary 8 is equal.

[0035] The electronic paper film 2 is for displaying images that are actually visible to the human eye. It is attached to the thin-film transistor substrate 1 and covers the display area 11 and the transition area 12 (usually the edges of the electronic paper film 2 are located outside the transition area 12). By connecting electrodes on the thin-film transistor substrate 1 (e.g., VCOM electrodes) and electrodes on the electronic paper film 2 (e.g., VCOM ITO electrodes) via electrical connection points 14 (e.g., silver paste bonding points), the electrodes on the electronic paper film 2 are driven.

[0036] The protective film 3 mainly comprises a waterproof layer and an anti-glare layer. The protective film 3 is sealed and connected to the thin-film transistor substrate 1 via a sealing connection member (e.g., adhesive 4), and is also attached to the electronic paper film 2. By bonding the edges of the protective film 3 and the thin-film transistor substrate 1 to each other, it is used for anti-glare purposes and blocks water vapor from entering the electronic paper film 2.

[0037] The flexible circuit board 6 and the drive chip 5 are typically located in the lower frame region of the thin-film transistor substrate 1 and sealed with a sealing ring connecting member (e.g., silicone rubber 7). The flexible circuit board 6 connects the external circuit and the electronic paper screen to enable signal transmission between the external circuit and the electronic paper screen. The drive chip 5 receives signals transmitted from the external circuit via the flexible circuit board 6 and converts the signals into voltage and timing to drive the updating of the electronic paper screen. The flexible circuit board 6 and the drive chip 5 are located on the thin-film transistor substrate 1 and are welded to the thin-film transistor substrate 1 by, for example, thermocompression bonding with the silicone rubber 7.

[0038] Based on the understanding of the overall structure of the electronic paper film 2 screen described above, in one embodiment of this application, we will explain as an example in which the display area 11 is rectangular and an empty area is reserved in advance only at the lower left vertex corner. In other embodiments, the display area 11 may be a polygon other than a rectangle, and the number and position of the empty areas are not limited. For example, specifically, taking a rectangular display area 11 as an example, as shown in Figures 4a to 4d, an empty area may be reserved in advance at any one of the upper left vertex corner, lower left vertex corner, upper right vertex corner, and lower right vertex corner, or at the same time, an empty area may be reserved in advance at any two or more of the upper left vertex corner, lower left vertex corner, upper right vertex corner, and lower right vertex corner. Based on the fact that the number of electrical connection points 14 affects the electrode driving capability, the more electrical connection points 14 there are, the better the driving capability of the thin-film transistor substrate 1 for the electrodes on the electronic paper film 2. However, the number of electrical connection points 14 also affects the number of cuts of electronic paper film 2 and the amount of electrical connection material used. As the number of electrical connection points 14 increases, the number of cuts of electronic paper film 2 decreases and the amount of electrical connection material used also improves. In short, from the perspective of product characteristics, two electrical connection points 14 are superior to a single electrical connection point 14, but from the perspective of cost reduction, a single electrical connection point 14 is superior to two electrical connection points 14. To balance characteristics and cost reduction, it is common to use a single electrical connection point 14 for sizes of 3.5 inches or less, and two or more electrical connection points 14 for sizes of 3.5 inches or more.

[0039] As shown in Figures 3a1 and 3a2 or 3b1 and 3b2, the electronic paper screen includes a thin-film transistor substrate 1, an electronic paper film 2, and electrical connection points 14. The thin-film transistor substrate 1 has a rectangular display area 11, with one empty area reserved in advance at the lower left vertex corner of the display area 11. This empty area is demarcated by a first area boundary 8 in the display area 11. An electrical connection point 14 is provided on the electronic paper film 2 opposite the location of the empty area for connecting electrodes on the thin-film transistor substrate 1 and electrodes on the electronic paper film 2. The outer contour of the electrical connection point 14 forms a second area boundary 9 in the plane of the thin-film transistor substrate 1. The portion of the second area boundary 9 corresponding to the first area boundary 8 is an equidistant portion, and the minimum distance from any point in the equidistant portion to the first area boundary 8 is equal.

[0040] Figure 3b1 and Figure 3a1 differ only in that Figure 3b1 further includes a transition region 12 between the display region 11 and the non-display region. As can be seen from the above explanation, the transition region 12 is usually selectively provided, and the boundary of the transition region 12 is parallel to the first region boundary 8, that is, the existence of the transition region 12 does not affect this technology. For further explanation, in this embodiment, we will explain based on the structure shown in Figure 3b1, which has more structures.

[0041] Example 1 This embodiment provides a solution that makes it possible to make the minimum distance from any point in the equidistant portion to the first region boundary 8 equal. The first region boundary 8 is arc-shaped, and the equidistant portions are provided on corresponding arc segments. As can be seen from this, the second domain boundary 9 is a regular or irregular closed figure having the arc segment, which can be further subdivided as follows: 1) The second domain boundary 9 is a closed figure consisting of a curve segment and the arc segment, where the radians of the curve segment and the radians of the arc segment are the same or different, and are non-circular, such as a perfect circle (as shown in Figures 3a1, 3b1, 4a, 4b, 4c, or 4d) or an ellipse (see Figures 5a1 and 5a2); 2) The second domain boundary 9 is a closed figure consisting of a straight line segment and the arc segment, including, but not limited to, a semicircle (see Figures 5b1 and 5b2), a sector (see Figures 5c1 and 5c2), and a teardrop shape (see Figures 5d1 and 5d2, where the arc segment is a major arc and consists of a major arc and two straight line segments exhibiting an acute angle). Furthermore, a broken line segment is considered to be made up of multiple straight line segments that are sequentially connected to each other.

[0042] Example 2 This embodiment provides another solution that makes it possible to make the minimum distance from any point in the equidistant portion to the first region boundary 8 equal. The first domain boundary 8 is either linear or polylinear, and the equidistant portions are linear segments provided in correspondence with the linear shape, or the equidistant portions are linear segment structures provided in correspondence with the polylinear shape, consisting of multiple linear segments connected sequentially (a structure consisting of multiple linear segments connected sequentially is substantially represented as a polylinear shape, and the principle is essentially the same as considering the above polylinear segment as consisting of multiple linear segments connected sequentially), and the linear segment structure and the polylinear shape are parallel. As can be seen from this, the second domain boundary 9 is a regular or irregular closed figure having the linear segment or linear segment structure, which can be further subdivided as follows: 1) The second domain boundary 9 is a polygon having the linear segment or linear segment structure, including but not limited to triangles (see Figures 6a1 and 6a2) and pentagons (see Figures 6b1 and 6b2); 2) The second domain boundary 9 is a closed figure consisting of the linear segment and curved segment, or a closed figure consisting of the linear segment structure and curved segment, including but not limited to semicircles (see Figures 6c1 and 6c2) and special sectors (see Figures 6d1 and 6d2, consisting of three linear segments and curved segments).

[0043] Example 3 This embodiment provides a third type of solution that makes it possible to make the minimum distance from any point in the equidistant portion to the first region boundary 8 equal. The first region boundary 8 is a mixed shape consisting of a straight line and an arc, or a mixed shape consisting of a broken line and an arc, and the equidistant portion is a mixed line segment provided corresponding to the mixed shape, and the second region boundary 9 is a closed figure having the mixed line segment. Similarly, the installation of the structure corresponding to the broken line in the second region boundary 9 is described in Example 2 and will not be repeated in this embodiment. For example, as shown in Figures 7a and 7b, if the line segments near both ends of the first region boundary 8 are straight lines and the line segment connecting the two straight line segments is an arc, the second region boundary 9 is provided as a square, and a chamfer is made at the upper right corner of the square, so that the upper and right sides of the second region boundary 9 correspond to the two straight line segments of the first region boundary 8, and the chamfer of the second region boundary 9 corresponds to the arc line segment of the first region boundary 8, ensuring that the minimum distance from any point in the equidistant portion to the first region boundary 8 is equal.

[0044] Example 4 This embodiment provides a solution that allows for further adjustment of the installation position of the second region boundary 9 based on any of the embodiments of Embodiment 1, Embodiment 2, or Embodiment 3. As shown in Figure 8 in the vertical cross-sectional view, the second region boundary 9 is located inside the electronic paper film 2, creating a gap between the second region boundary 9 and the boundary of the electronic paper film 2. This prevents leakage of electrical connection points 14 to the outside of the electronic paper film 2 due to process variations. As a result, the point on the second region boundary 9 furthest from the first region boundary 8 can be located in the following places: 1) It can be located within or at the boundary of the original display region 11. The term "original" refers to the portion that should belong to the display region 11 if no empty region is reserved in advance, and the same applies hereafter. A schematic plan view can be found in Figures 3a1, 3b1, 4a, 5b1, 5c1, 6a1, 6b1, 6d1, or 7a. 2) It can be located within or at the boundary of the original transition region 12. A schematic plan view can be found in Figure 5a1 or 5d1. 3) It can be located within the region of the electronic paper film 2. A schematic plan view can be found in Figure 6c1.

[0045] Example 5 Based on any of the embodiments of Example 1, Example 2, or Example 3, a solution is provided that allows for further adjustment of the installation position of the second region boundary 9. As shown in Figures 9a, 9b, and 10, the second region boundary 9 is a closed figure formed based on the boundary of the electronic paper film 2. As a result, a portion of the boundary of the electronic paper film 2 constitutes a portion of the second region boundary 9, thereby minimizing the display area lost by the display region 11. In this embodiment, the arc-shaped portion of the second region boundary 9 may adopt the design of the corresponding portion in Embodiment 1, Embodiment 2, or Embodiment 3. However, considering that the remaining portion overlaps with a portion of the boundary of the electronic paper film 2, it is limited only by the boundary of the electronic paper film 2.

[0046] Example 6 Based on Example 4 or Example 5, the distances or dimensions between each structure are further limited to make the above arrangement more rational. As an example, assuming that a transition region 12 is still provided, and in order to precisely determine such distance parameters as they relate to the dimensional range, in this embodiment, the measurement position of the distance will be specifically described, where the cutting lines A and A' intersect at the center of the electrical connection point 14, and as a method for determining the center of the electrical connection point 14, four points closest to the left, right, top, and bottom of the second region boundary 9 are selected, one vertical line is drawn through the left and right points, one horizontal line is drawn through the top and bottom points, a rectangle is enclosed by the two vertical lines and the two horizontal lines, one vertical line is drawn perpendicular to the length and width of the rectangle, the intersection of the two vertical lines is the center, the cutting line A is perpendicular to the horizontal line, and the angle between the cutting line A' and the horizontal line is 45°. Thus, when the second region boundary is a regular figure (not including a perfect circle), the center determined according to the above method is the intersection of the diagonals or the center of the circle, and when the second region boundary is an irregular figure, the center is determined according to the above method. The B-B' cutting line is also provided in a similar manner, and will not be explained again below.

[0047] Based on the above description, and referring to Figures 8 and 10, the minimum distance between the second region boundary 9 and the boundary of the electronic paper film 2 is L2, with a range of values ​​of 0 mm ≤ L2 ≤ 1 mm (L2 is not shown because, according to the cross-sectional path set in this embodiment, it is not necessarily the closest position at the A cutting line), the minimum width of the transition region 12 is L3, with a range of values ​​of 0 mm ≤ L3 ≤ 1 mm, the minimum distance between the equidistant portion of the second region boundary 9 and the boundary of the transition region 12 is L4, with a range of values ​​of 0.3 mm ≤ L4 ≤ 2 mm and ensuring that 0.5 mm ≤ L3 + L4 ≤ 3 mm, and the minimum distance between the boundary of the electronic paper film 2 and the boundary of the protective film 3 is L5, with a range of values ​​of 0.5 mm ≤ L5 ≤ 2 mm. If the transition region 12 is not provided, the minimum distance between the equidistant portion of the second region boundary 9 and the first region boundary 8 is L1, and the range of L1 is ensured to be 0.5 mm ≤ L1 ≤ 3 mm. The distance L1 (not shown) is set to isolate the electrical connection point 14 from the display region 11, thereby preventing the electronic ink from entering the display region 11 during use due to edge damage caused by laser cutting at the electrical connection point 14 of the electronic paper film 2. The distance L4 is set to isolate the electrical connection point 14 from the transition region 12, thereby preventing misconnection between the electrical connection point 14 and the electrodes of the transition region 12, and also to prevent the electronic ink from entering the transition region 12 during use due to edge damage caused by laser cutting at the electrical connection point 14 of the electronic paper film 2. The distance L3 + L4 is set to isolate the electrical connection point 14 from the display region 11, thereby preventing the electronic ink from entering the display region 11 during use due to edge damage caused by laser cutting at the electrical connection point 14 of the electronic paper film 2. The distance L5 is set for the adhesive 4 that adheres the edge of the protective film 3 to the thin-film transistor substrate 1, thereby preventing water vapor from entering the electronic paper film 2.

[0048] Furthermore, embodiments of this application further provide an electronic paper display including the electronic paper screen described above.

[0049] Embodiments of this application further provide an electronic terminal including the above-described electronic paper display.

[0050] The foregoing are merely illustrative examples of specific embodiments of this application and are not intended to limit the scope of this application. Those skilled in the art will know that any equivalent modifications and amendments made without departing from the ideas and principles of this application should fall within the scope of the rights protected by this application. [Explanation of Symbols]

[0051] 1. Thin-film transistor substrate, 11. Display area, 12. Transition area, 13. Ear canal, 14. Electrical connection point, 2. Electronic paper film, 3. Protective film, 4. Forehead adhesive, 5. Drive chip, 6. Flexible circuit board, 7. Silicone rubber, 8. First area boundary, 9. Second area boundary.

Claims

1. An electronic paper screen comprising a thin-film transistor substrate having a polygonal display area, with an empty area pre-reserved at at least one vertex position of the display area, an electronic paper film, and an electrical connection point, Each of the aforementioned empty areas is demarcated by a first area boundary, The electronic paper film facing the location of the empty area is provided with the electrical connection point for connecting the electrode on the thin-film transistor substrate and the electrode on the electronic paper film. The outer contour of the electrical connection point forms a second region boundary in the plane of the thin-film transistor substrate. The portion of the second region boundary corresponding to the first region boundary is an equidistant portion, and the minimum distance from any point in the equidistant portion to the first region boundary is equal. An electronic paper screen characterized by the following features.

2. The first region boundary is arc-shaped, and the equidistant portions are provided on corresponding arc segments. The electronic paper screen according to claim 1.

3. The second region boundary is a closed figure consisting of a curved segment and the circular arc segment, and the radians of the curved segment and the circular arc segment are the same or different. The electronic paper screen according to feature 2.

4. The boundary of the second region is a closed figure consisting of a straight line segment and the circular arc segment. The electronic paper screen according to feature 2.

5. The first region boundary is either linear or polylinear, and the equidistant portion is a linear segment provided corresponding to the linear shape, or the equidistant portion is a linear segment structure provided corresponding to the polylinear shape, in which multiple linear segments are sequentially connected. The electronic paper screen according to claim 1.

6. The boundary of the second region is a linear segment or a polygon having the linear segment structure. The electronic paper screen according to feature 5.

7. The boundary of the second region is a closed figure consisting of the straight line segment and the curved segment, or a closed figure consisting of the straight line segment structure and the curved segment. The electronic paper screen according to feature 5.

8. The first region boundary is a mixed shape consisting of a straight line and an arc, or a mixed shape consisting of a broken line and an arc, the equidistant portion is a mixed line segment provided corresponding to the mixed shape, and the second region boundary is a closed figure having the mixed line segment. The electronic paper screen according to claim 1.

9. Because the second region boundary is located inside the electronic paper film, a gap exists between the second region boundary and the boundary of the electronic paper film. The electronic paper screen according to claim 1.

10. The second region boundary is a closed figure formed based on the boundary of the electronic paper film, and therefore a portion of the boundary of the electronic paper film constitutes a portion of the second region boundary. The electronic paper screen according to claim 1.

11. The minimum distance between the equidistant portion and the first region boundary is L1, and the range of the value of L1 is 0.5 mm ≤ L1 ≤ 3 mm. The minimum distance between the second region boundary and the boundary of the electronic paper film is L2, and the range of L2 is 0 mm ≤ L2 ≤ 1 mm. The electronic paper screen according to claim 1.

12. A transition region is provided around the display region, the minimum width of the transition region is L3, and the range of L3 is 0 mm ≤ L3 ≤ 1 mm. The minimum distance between the boundary of the second region and the boundary of the transition region is L4, and the range of the value of L4 is 0.3 mm ≤ L4 ≤ 2 mm, and Ensure that 0.5 mm ≤ L3 + L4 ≤ 3 mm. The electronic paper screen according to claim 1.

13. The electronic paper film further includes a protective film attached to the electronic paper film, wherein the minimum distance between the boundary of the electronic paper film and the boundary of the protective film is L5, and the range of L5 is 0.5 mm ≤ L5 ≤ 2 mm. The electronic paper screen according to claim 1.

14. Includes an electronic paper screen according to any one of claims 1 to 13 An electronic paper display characterized by the following features.

15. Includes the electronic paper display described in claim 14 An electronic terminal characterized by the following features.

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