Electronic paper display module and electronic paper display device

Abstract

The utility model provides an electronic paper display module and an electronic paper display device. The electronic paper display module comprises a display area and a non-display area at least located on one side of the display area, the display area is provided with a notch area, and the electronic paper display module comprises a substrate, a driving circuit layer, an electronic ink layer, a common electrode and conductive adhesive. Wherein the driving circuit layer is located on the substrate and comprises a common signal line, and at least part of the common signal line is located in the non-display area; the electronic ink layer is located in the display area and arranged on the side, away from the substrate, of the driving circuit layer. The common electrode is located on one side of the electronic ink layer away from the driving circuit layer and at least partially located in the display area; one end of the conductive adhesive is connected with the common signal line, and the other end of the conductive adhesive is connected with the common electrode. The size of a frame area can be reduced, and the proportion of a display area is increased.

Description

Technical Field

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

[0002] In electronic paper display (EPD) products, silver glue dots are set in the non-display area outside the display area, resulting in the fan-out portion of the signal line needing to bypass the silver glue dots, thus occupying a larger lower frame and reducing the display utilization rate. Utility Model Content

[0003] In view of the shortcomings of the related art, the present application proposes an electronic paper display module and an electronic paper display device to solve the problem of low display screen utilization in the related art.

[0004] An embodiment of the present application provides an electronic paper display module, comprising a display area and a non-display area at least located on one side of the display area, wherein the display area is provided with a notch area, and the electronic paper display module comprises:

[0005] substrate;

[0006] A driving circuit layer, located on the substrate, including a common signal line at least partially located in the non-display area;

[0007] The electronic ink layer is located in the display area and is arranged on a side of the driving circuit layer away from the substrate;

[0008] A common electrode, located on a side of the electronic ink layer away from the driving circuit layer, and at least partially located in the display area;

[0009] The conductive glue is located in the notch area, one end of the conductive glue is connected to the common signal line, and the other end of the conductive glue is connected to the common electrode.

[0010] In some embodiments, the notch area is formed by a concave edge of the display area.

[0011] In some embodiments, the notch area is located at a corner of the display area.

[0012] In some embodiments, the driving circuit layer further includes a pixel circuit and a plurality of driving signal lines electrically connected to the pixel circuit, and the orthographic projection of the driving signal line on the substrate does not overlap with the orthographic projection of the conductive paste on the substrate.

[0013] In some embodiments, the multiple drive signal lines include multiple first drive signal lines extending along a first direction, and the electronic paper display module includes a first side extending along the first direction; the first drive signal line includes a first segment and a second segment connected, the first segment is linear, and the second segment is non-linear; in a second direction perpendicular to the first direction, the maximum distance between the edge of the orthographic projection of the conductive glue on the substrate and the first side is greater than the distance between the first segment and the first side, the minimum distance between the edge of the orthographic projection of the conductive glue on the substrate and the first side is less than the distance between the first segment and the first side, and the second segment is located on the side of the conductive glue and matches the shape of the conductive glue.

[0014] In some embodiments, the second section is in a zigzag or curved line shape.

[0015] In some embodiments, the driving signal line includes a plurality of the first driving signal lines;

[0016] The second sections of each of the first driving signal lines are located on the same side of the conductive glue; or, the second sections of a plurality of the first driving signal lines are distributed on two opposite sides of the conductive glue.

[0017] In some embodiments, the electronic paper display module further includes a transition display area located on the array substrate, the transition display area is arranged around the display area, and the notch area is formed by the edge of the display area being concave;

[0018] The conductive glue is located inside the transition display area.

[0019] In some embodiments, the electronic paper display module further includes a transition display area, which is arranged around the display area, and the shape of a portion of the transition display area between the conductive adhesive and the display area matches the shape of an edge of the conductive adhesive.

[0020] In some embodiments, the display area is provided with at least two notch areas, and each notch area is provided with the conductive glue.

[0021] The present application also provides an electronic paper display device, comprising the electronic paper display module as described above.

[0022] The beneficial effects of this application include:

[0023] In this embodiment, a notch area is set in the display area, and the position of the conductive glue is moved from the non-display area in the traditional technology to the notch area of ​​the display area, which can avoid the conductive glue occupying the area of ​​the frame area, reduce the size of the frame area, and increase the proportion of the display area.

[0024] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0026] Figure 1 Shown is a top view of an electronic paper display module in the related art;

[0027] Figure 2 Shown is a top view of an electronic paper display module provided by an exemplary embodiment of the present application;

[0028] Figure 3 Shown is a partial side cross-sectional view of an electronic paper display module provided by an exemplary embodiment of the present application;

[0029] Figure 4 Shown Figure 2 A schematic diagram of an exemplary wiring structure is enlarged at A;

[0030] Figure 5 Shown Figure 2 A schematic diagram of an exemplary wiring structure is enlarged at A;

[0031] Figure 6 Shown Figure 2 A schematic diagram of an exemplary wiring structure is enlarged at A;

[0032] Figure 7 FIG. 1 is a schematic diagram showing the distribution structure of the notch area of ​​an electronic paper display module provided by an exemplary embodiment of the present application.

[0033] In the figure: 1-conductive glue; 2-driving signal line; 21-first driving signal line (gate signal line); first section 211; second section 212; 22-second driving signal line; 221-third section; 222-fourth section; 22a-data signal line; 22b-common signal line; 3-crack detection line; 4-static release line; 5-static release structure; 6-electrode; 7-driving chip; 8-flexible circuit board; 100-substrate; 200-driving circuit layer; 210-gate layer; 220-source and drain layer; 300-electronic ink layer; 400-common electrode; 500-pixel electrode layer; AA-display area; DA-notch area; NA-non-display area; TA-transition display area. DETAILED DESCRIPTION

[0034] In the related art, in the electronic paper display module, the common signal line in the driving circuit layer is connected to the common electrode arranged on the side of the electronic ink layer away from the driving circuit layer through a conductive glue. Figure 1 As shown, the electronic paper display module includes a display area AA and a non-display area NA and a transitional display area TA disposed between the display area AA and the non-display area NA, wherein the conductive glue 1' is disposed in the non-display area NA, that is, outside the transitional display area TA, and thus occupies the area of ​​the frame region. An electrode 6' for driving the conductive particles of the electronic ink layer 300 to move is disposed in the transitional display area TA. In order to avoid a short circuit between the conductive glue 1' and the electrode 6' of the transitional display area TA, a certain interval is required between the conductive glue 1' and the transitional display area TA, which results in a larger frame size of the display module.

[0035] The electronic paper display module and electronic paper display device provided in this application are intended to solve the above technical problems.

[0036] The electronic paper display module and the electronic paper display device in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features in the following embodiments can complement or be combined with each other.

[0037] like Figure 2 As shown, the embodiment of the present application provides an electronic paper display module, including a display area AA and a non-display area NA located at least on one side of the display area AA, and the display area AA is provided with a notch area DA. Figure 3 As shown, the electronic paper display module includes a substrate 100, a driving circuit layer 200, an electronic ink layer 300, a common electrode 400 and a conductive glue 1. The driving circuit layer 200 is located on the substrate 100, and includes a common signal line 22b at least partially located in the non-display area NA; the electronic ink layer 300 is located in the display area AA, and is arranged on the side of the driving circuit layer 200 away from the substrate 100; the common electrode 400 is located on the side of the electronic ink layer 300 away from the driving circuit layer 200, and is at least partially located in the display area AA; the conductive glue 1 is located in the notch area DA, and one end of the conductive glue 1 is connected to the common signal line 22b (not shown in the figure), and the other end is connected to the common electrode 400.

[0038] In this embodiment, a notch area DA is set in the display area AA, and the position of the conductive adhesive 1 is moved from the position in the non-display area NA in the traditional technology to the notch area DA in the display area AA, so that the conductive adhesive 1 can be prevented from occupying the area of ​​the frame area, the size of the frame area can be reduced, and the proportion of the display area of ​​the display module can be increased.

[0039] In one embodiment, Figure 2 As shown, the non-display area is arranged around the display area.

[0040] In some embodiments, the non-display area NA is provided with a binding area, and the binding area is provided with a binding terminal. Figure 2 As shown, the electronic paper display module also includes a driving chip 7 and a flexible circuit board 8. The driving chip 7 is bound to the binding terminal, the flexible circuit board 8 is connected to the end located in the non-display area NA, and the flexible circuit board 8 is located on the side of the driving chip 7 away from the display area AA.

[0041] In some embodiments, the substrate 100 may be a rigid substrate or a flexible substrate. The rigid substrate may be made of glass or quartz, and the flexible substrate may be made of a polymer material, such as polyimide (PI), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN) or graphite.

[0042] In one embodiment, Figure 3 As shown, the display module further includes a pixel electrode layer 500 located between the electronic ink layer 300 and the driving circuit layer 200 , and the pixel electrode layer 500 includes a plurality of pixel electrodes.

[0043] In some embodiments, the driving circuit layer 200 includes a pixel driving circuit, which is electrically connected to the pixel electrode. The pixel driving circuit may include a thin film transistor or other types of switching elements, such as Figure 3 As shown, the driving circuit layer 200 may include a gate layer 210 and a source-drain layer 220 . The gate of the thin film transistor may be located at the gate layer 210 , and the source and drain may be located at the source-drain layer 220 .

[0044] In some embodiments, the electronic ink layer 300 includes a plurality of charged dye particles of different colors. When an electric field is applied between the pixel electrode and the common electrode 400, the charged dye particles move according to the difference in charge, thereby displaying corresponding colors.

[0045] In some embodiments, the material of the common electrode 400 is a light-transmitting conductive material, for example, the material of the common electrode 400 is indium tin oxide (ITO).

[0046] In some embodiments, the conductive glue 1 passes through the electronic ink layer 300, one end of which is connected to the common signal line 22b in the driving circuit layer 200, and the other end of which is connected to the common electrode 400. The common signal line 22b in the non-display area NA provides a common voltage signal to the common electrode.

[0047] In some embodiments, Figure 2 As shown, the notch area DA is formed by the edge of the display area AA being concave. Such a configuration can ensure the continuity of the display area and help improve the display quality.

[0048] In some other embodiments, the notch area DA may be formed by opening a hole inside the display area AA (not shown in the figure).

[0049] In some embodiments, the projection shape of the orthographic projection of the display area AA on the substrate 100 has multiple vertex angles. For example, the projection shape of the orthographic projection of the display area AA on the substrate 100 is a polygon, and the notch area DA is located at the corner of the display area AA. Figure 2 As shown, the shape of the orthographic projection of the display area AA on the substrate 100 is a rectangle, and the notch area DA is located at any vertex of the rectangle.

[0050] In some embodiments, the driving circuit layer 200 includes a pixel circuit and a plurality of driving signal lines electrically connected to the pixel circuit, and the orthographic projection of the driving signal line on the substrate 100 does not overlap with the orthographic projection of the conductive glue 1 on the substrate 100. This is helpful to prevent the conductive glue 1 from contacting the driving signal line to cause a short circuit or parasitic capacitance, thereby causing signal interference or affecting the normal operation of the display module.

[0051] In some embodiments, Figure 2 As shown, the plurality of driving signal lines 2 include at least one first driving signal line 21 extending along a first direction, the first direction is perpendicular to the direction y (the first direction is also the x direction) pointing to the binding area from the display area AA, the electronic paper display module includes a first side 9a extending along the first direction, the first driving signal line 21 includes a gate signal line 21, and the first driving signal line 21 includes a connected first section 211 and a second section 212. The first driving signal line 21 extending along the first direction x means that the first driving signal line 2 extends along the first direction x as a whole, and may include a portion that does not extend along the first direction x, but the length of the portion is much smaller than the length of the section extending along the first direction x. The first section 211 is linear, and the second section 212 is non-linear; in the second direction perpendicular to the first direction x (the second direction is also the y direction), the maximum distance between the edge of the orthographic projection of the conductive glue 1 on the substrate 100 and the first side 9a is greater than the distance between the first section 211 and the first side 9a, and the minimum distance between the edge of the orthographic projection of the conductive glue 1 on the substrate 100 and the first side 9a is less than the distance between the first section 211 and the first side 9a, and the second section 212 is located at the side of the conductive glue 1 and matches the shape of the conductive glue 1. In this way, the second section 212 of the first drive signal line 21 bypasses the notch area DA for routing to avoid signal crosstalk or short circuit; at the same time, the conductive glue 1 matches the shape of the second section 212 of the first drive signal line 21, so that the intervals between each part of the first drive signal line 21 and the conductive glue 1 are small, which can reduce the space occupied by the first drive signal line 21 and the conductive glue 1, and can provide more space for the arrangement of other signal lines, reducing the difficulty of wiring.

[0052] In some embodiments, the second section 212 is in a zigzag shape or a curved shape. Figure 4In the illustrated embodiment, the second section 212 is in the shape of a broken line. Figure 5 In the illustrated embodiment, the second section 212 is curved. Specifically, the conductive adhesive is substantially cylindrical, and the second section is substantially arc-shaped.

[0053] In one embodiment, Figure 2 As shown, the plurality of drive signal lines include at least one second drive signal line 22 extending along the second direction y, the second drive signal line 22 (including the data signal line 22a and the common signal line 22b) includes a third section 221 and a fourth section 222, the electronic paper display module includes a second side 9b extending along the first direction x, the maximum distance between the edge of the positive projection of the conductive glue 1 on the substrate 100 and the second side 9b is greater than the distance between the third section 221 and the second side 9b, the minimum distance between the edge of the positive projection of the conductive glue 1 on the substrate 100 and the second side 9b is less than the distance between the third section 221 and the second side 9b, and the fourth section 222 is located on the side of the conductive glue 1 and matches the shape of the conductive glue 1. With such a configuration, the fourth section 222 of the second drive signal line 22 is routed around the notch area DA to avoid signal crosstalk or short circuit; at the same time, the conductive glue 1 matches the shape of the fourth section 222 of the second drive signal line 22, which can reduce the space occupied by the second drive signal line 22 and the conductive glue 1, thereby providing more space for the setting of other signal lines and reducing the difficulty of wiring.

[0054] In one embodiment, Figure 2 , the x direction is the row direction, and the y direction is the column direction. In some embodiments, the fourth section 222 is in a zigzag or curved line shape. Figure 4 In the illustrated embodiment, the fourth section 222 is in a zigzag shape. Figure 5 In the illustrated embodiment, the fourth section 222 is in a curved shape. Specifically, the conductive adhesive is substantially cylindrical, and the fourth section is substantially arc-shaped.

[0055] In some embodiments, Figure 4 As shown, the driving signal line 2 includes a plurality of first driving signal lines 21 , and the second sections 212 of the first driving signal lines 21 are all located on the same side of the conductive glue 1 .

[0056] In one example, the second segments 212 of the first driving signal lines 21 are located on the same side of the conductive glue 1 close to the display area AA. This arrangement can avoid the first driving signal lines 21 occupying the side of the conductive glue 1 close to the non-display area NA, and further avoid occupying the frame area.

[0057] In some embodiments, Figure 4As shown, the driving signal line 2 includes a plurality of second driving signal lines 22, and the fourth sections 222 of the second driving signal lines 22 are all located on the same side of the conductive glue 1. This arrangement can avoid the second driving signal lines 22 occupying the side of the conductive glue 1 close to the non-display area NA, and further avoid occupying the frame area.

[0058] In some embodiments, Figure 5 As shown, the second sections 212 of each first driving signal line 21 are distributed on opposite sides of the conductive glue 1. The second sections 212 are evenly distributed on both sides of the conductive glue 1 to avoid the concentration of each line leading to a reduction in the spacing between adjacent lines.

[0059] In some embodiments, Figure 5 As shown, the fourth sections 222 of the second driving signal lines 22 are distributed on opposite sides of the conductive adhesive 1. The fourth sections 222 are evenly distributed on both sides of the conductive adhesive 1 to avoid the concentration of the lines leading to a reduction in the spacing between adjacent lines.

[0060] In some embodiments, the spacing between two adjacent driving signal lines extending in the same direction is greater than 5 μm to avoid signal crosstalk.

[0061] In some embodiments, Figure 2 As shown, the non-display area NA is further provided with an electrostatic discharge structure 5 (ESD) connected to the gate signal line 21 and an electrostatic discharge line 4 connected to the electrostatic discharge structure 5, wherein the electrostatic discharge line 4 includes a short ring.

[0062] In some embodiments, Figure 2 As shown, the non-display area NA is further provided with a crack detection line 3 connected to the driving chip 7 for detecting whether the edge of the display module is damaged.

[0063] In some embodiments, Figure 2 As shown, the electronic paper display module further includes a driving chip 7 and a circuit board 8 located in the non-display area NA and arranged away from the display area AA in sequence.

[0064] In some embodiments, Figure 2 , Figure 4 and Figure 5 As shown, the electronic paper display module also includes a transition display area TA, which is arranged around the display area AA, and the notch area DA is formed by the edge of the display area AA being concave; the conductive glue 1 is located inside the transition display area TA. Such an arrangement can prevent the conductive glue 1 from occupying the area of ​​the non-display area NA, thereby narrowing the area of ​​the frame.

[0065] In some embodiments, Figure 6As shown, the transition display area TA is partially located between the conductive glue 1 and the display area AA, and the shape of the portion of the transition display area TA located between the conductive glue 1 and the display area AA matches the shape of the edge of the conductive glue 1 to adapt to the position of the conductive glue 1 after the position is adjusted.

[0066] In some embodiments, the transitional display area TA is provided with a pixel electrode 6, and the pixel electrode 6 can be located in the same layer as the common signal line 22b. The material of the pixel electrode 6 can be transparent conductive oxide (ITO), and a vertical electric field is formed between the pixel electrode 6 and the common electrode 400 located above the electronic ink layer 300, so that the transitional display area TA can display a corresponding color.

[0067] In one embodiment, the conductive adhesive 1 is made of silver.

[0068] In some embodiments, Figure 7 As shown, the display area AA is provided with at least two notch areas DA, and each notch area DA is provided with a conductive adhesive 1 .

[0069] In some embodiments, each notch area DA may be located at each adjacent or opposite corner of the display area AA.

[0070] Based on the same inventive concept, the present application also provides an electronic paper display device, including the electronic paper display module as in the aforementioned embodiment.

[0071] In some embodiments, the electronic paper display device further includes a housing, which is sleeved on the electronic paper display module.

[0072] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

Claims

1. An electronic paper display module, characterized in that: The electronic paper display module comprises a display area and a non-display area at least located on one side of the display area, wherein the display area is provided with a notch area. The electronic paper display module comprises: substrate; A driving circuit layer, located on the substrate, including a common signal line at least partially located in the non-display area; The electronic ink layer is located in the display area and is arranged on a side of the driving circuit layer away from the substrate; A common electrode, located on a side of the electronic ink layer away from the driving circuit layer, and at least partially located in the display area; The conductive glue is located in the notch area, one end of the conductive glue is connected to the common signal line, and the other end of the conductive glue is connected to the common electrode.

2. The electronic paper display module according to claim 1, characterized in that: The notch area is formed by the indentation of the edge of the display area.

3. The electronic paper display module according to claim 2, characterized in that: The notch area is located at a corner of the display area.

4. The electronic paper display module according to claim 1, characterized in that: The driving circuit layer further includes a pixel circuit and a plurality of driving signal lines electrically connected to the pixel circuit, and the orthographic projection of the driving signal line on the substrate does not overlap with the orthographic projection of the conductive glue on the substrate.

5. The electronic paper display module according to claim 4, characterized in that: The multiple drive signal lines include at least one first drive signal line extending along a first direction, and the electronic paper display module includes a first side extending along the first direction; the first drive signal line includes a first segment and a second segment connected, the first segment is linear, and the second segment is non-linear; in a second direction perpendicular to the first direction, the maximum distance between the edge of the positive projection of the conductive glue on the substrate and the first side is greater than the distance between the first segment and the first side, the minimum distance between the edge of the positive projection of the conductive glue on the substrate and the first side is less than the distance between the first segment and the first side, and the second segment is located on the side of the conductive glue and matches the shape of the conductive glue.

6. The electronic paper display module according to claim 5, characterized in that: The second section is in a zigzag shape or a curve shape.

7. The electronic paper display module according to claim 5, characterized in that: The driving signal line includes a plurality of the first driving signal lines; The second sections of each of the first driving signal lines are located on the same side of the conductive glue; or, the second sections of a plurality of the first driving signal lines are distributed on two opposite sides of the conductive glue.

8. The electronic paper display module according to claim 1, characterized in that: The electronic paper display module further comprises a transition display area, which is arranged around the display area, and the notch area is formed by the concave edge of the display area; The conductive glue is located inside the transition display area.

9. The electronic paper display module according to claim 1, characterized in that: The electronic paper display module also includes a transition display area, which is arranged around the display area. The transition display area is partially located between the conductive glue and the display area, and the shape of the portion of the transition display area located between the conductive glue and the display area matches the shape of the edge of the conductive glue.

10. The electronic paper display module according to claim 1, characterized in that: The display area is provided with at least two notch areas, and each notch area is provided with the conductive glue.

11. An electronic paper display device, characterized in that: It comprises the electronic paper display module as claimed in any one of claims 1 to 10.

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