Driver substrate, electronic paper display device and electronic equipment

Abstract

This utility model relates to the technical field of electronic paper devices, and discloses a driving substrate, an electronic paper display device, and an electronic device. The driving substrate forms a display area and a non-display area. The display area is provided with multiple pixel units, each pixel unit including a thin film transistor and a driving electrode electrically connected to the thin film transistor. The non-display area is formed on the outer periphery of the display area. The non-display area is provided with an electrostatic ring. The electrostatic ring includes a first metal layer, a first insulating layer, a second metal layer, a second insulating layer, and a third metal layer stacked sequentially along the thickness direction of the driving substrate. The first insulating layer is provided with a first via, and the second insulating layer is provided with a second via. The first metal layer is electrically connected or electrically coupled to the third metal layer at the first via, and the second metal layer is electrically connected or electrically coupled to the third metal layer at the second via. A first gap exists between either the first via or the second via and the edge of the display area.

Description

Technical Field

[0001] This utility model relates to an electronic paper device, and more particularly to a driving substrate, an electronic paper display device, and an electronic device. Background Technology

[0002] With the continuous development of flat panel display technology, electronic paper technology has been widely used due to its advantages such as power saving and environmental protection. Among electronic paper technologies, electrophoretic display technology has developed the fastest, which uses charged particles to migrate under the action of an electric field to display different images.

[0003] Electronic paper typically includes an electrophoretic layer and electrodes distributed on both sides of the electrophoretic layer. An electric field is formed between the two electrodes, driving the charged particles in the electrophoretic layer to form an image. One of the electrodes is formed on a driving substrate. The electrodes on the driving substrate are usually highly sensitive components, which are easily affected by the external electrostatic environment, affecting their lifespan. An electrostatic device is installed in the electronic paper device to dissipate static electricity. However, because the electrophoretic layer located in the display area is prone to overflowing the electrostatic paste and entering the electrostatic device, it can cause corrosion of the metal lines, thus affecting the use of the electronic paper device. Utility Model Content

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, the first aspect of this invention provides a driving substrate, an electronic paper display device, and an electronic device, which prevents the electronic paste from corroding the metal wires within the electrostatic device by positioning an electrostatic ring away from the display area.

[0005] In a first aspect, this application provides a driving substrate, which has a display area and a non-display area. The display area is provided with a plurality of pixel units, each pixel unit including a thin film transistor and a driving electrode electrically connected to the thin film transistor. The non-display area is formed on the outer periphery of the display area.

[0006] The thin-film transistor is provided with an electrostatic ring, which includes at least two electrostatic neutralization parts. The non-display area is provided with an electrostatic ring, which includes a first metal layer, a first insulating layer, a second metal layer, a second insulating layer, and a third metal layer stacked sequentially along the thickness direction of the driving substrate. The first insulating layer is provided with a first via, and the second insulating layer is provided with a second via. The first metal layer is electrically connected or electrically coupled to the third metal layer at the first via, and the second metal layer is electrically connected or electrically coupled to the third metal layer at the second via.

[0007] There is a first distance between either the first via or the second via and the edge of the display area.

[0008] In some embodiments, the first distance between either the first via or the second via and the edge of the display area is h1, satisfying that the first distance h1 is greater than or equal to 200 μm.

[0009] In some embodiments, the driving substrate includes a plurality of electrostatic rings surrounding the outer periphery of the display area.

[0010] In some embodiments, the thin-film transistor includes a gate, a semiconductor, a source, and a drain. The second insulating layer is also located between the thin-film transistor and the driving electrode. A through hole is also formed on the second insulating layer corresponding to the drain. The drain and the driving electrode are electrically connected at the through hole.

[0011] In some embodiments, the gate and the first metal layer are located in the same structural layer, and the source, the drain and the second metal layer are located in the same structural layer.

[0012] In some embodiments, the driving substrate further includes a leveling layer disposed between the second insulating layer and the driving electrode, and the leveling layer has an opening at the position corresponding to the connecting hole.

[0013] In some implementations, the semiconductor is located between the source and the drain.

[0014] In some embodiments, the semiconductor is also located between the first insulating layer and the second insulating layer in the thickness direction of the driving substrate.

[0015] In a second aspect, this application provides an electronic paper display device, including a display film and a driving substrate as described in any one of the first aspects of this application;

[0016] The display film includes a dielectric layer and a top electrode. The dielectric layer includes an electronic paste and is located between the top electrode and the driving substrate.

[0017] Thirdly, this application provides an electronic device, including the electronic paper display device as described in the second aspect of this application.

[0018] As can be seen from the above embodiments, during the process of setting the display film, some electronic paste is prone to overflow from the edge of the display film. The electronic paper display device in the first aspect of this application prevents the electronic paste from spreading into the via and causing corrosion by setting a first gap between the via and the edge of the display area, thereby improving the yield of the driving substrate and the stability during subsequent use. The driving substrate of the electronic paper display device in the second aspect of this application and the electronic device in the third aspect of this application have the same beneficial effects because they include the driving substrate in the first aspect of this application.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of the planar structure of the electronic paper display device in an embodiment of this utility model;

[0022] Figure 2 for Figure 1 An enlarged schematic diagram of point A in the electronic paper display device;

[0023] Figure 3 This is a schematic diagram of the planar structure of the electrostatic ring in an embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view of one of the pixel units in an embodiment of the present invention.

[0025] Reference numerals: 100, driving substrate; 101, first metal layer; 102, second metal layer; 103, third metal layer; 104, leveling layer; 110, display area; 120, non-display area; 130, pixel unit; 140, thin-film transistor; 141, gate; 142, semiconductor; 143, source; 144, drain; 150, driving electrode; 161, via; 170, first insulating layer; 171, first via; 180, second insulating layer; 181, second via; 190, display film; 191, top electrode; 192, dielectric layer; 200, electrostatic ring. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] Please see Figures 1-4 The first aspect of this application provides a driving substrate 100 for use in an electronic paper display device, the electronic paper display device including a display film 190 and a driving substrate 100.

[0032] The driving substrate 100 has a display area 110 and a non-display area 120. The display area 110 is provided with a plurality of pixel units 130. Each pixel unit 130 includes a thin film transistor 140 and a driving electrode 150. A dielectric layer 192 is located between the top electrode 191 and the driving electrode 150. An insulating layer is provided between the driving electrode 150 and the thin film transistor 140. The insulating layer has a through hole 161. The driving electrode 150 is electrically connected to the thin film transistor 140 at the through hole 161.

[0033] An electrostatic ring 200 is provided in the non-display area 120. The electrostatic ring 200 includes a first metal layer 101, a first insulating layer 170, a second metal layer 102, a second insulating layer 180, and a third metal layer 103, which are stacked sequentially along the thickness direction of the driving substrate 100. The first insulating layer 170 has a first via 171, and the second insulating layer 180 has a second via 181. The first metal layer 101 is electrically connected or coupled to the third metal layer 103 at the first via 171, and the second metal layer 102 is electrically connected or coupled to the third metal layer 103 at the second via 181. Typically, one electrostatic ring... The electrostatic ring 200 includes two first vias 171 and two second vias 181. For example, after the charge generated by static electricity enters the first metal layer 101, it enters the third metal layer 103 through the first via 171. The charge flows through the third metal layer 103 to the second via 181 and then through the second via 181 to the second metal layer 102. Subsequently, the charge re-enters the third metal layer 103 at another second via 181 and enters the first metal layer 101 through another first via 171. The charge flows in a ring-shaped transmission path within the electrostatic ring 200 so that the charge is neutralized and dissipated within the electrostatic ring 200.

[0034] The driving substrate 100 includes a plurality of electrostatic rings 200, which are disposed around the outer periphery of the display area 110 to prevent static electricity from entering the display area 110 and causing display abnormalities.

[0035] There is a first gap between either the first via 171 or the second via 181 and the edge of the display area 110.

[0036] Since the display film 190 needs to be cut during the process of setting the display film 190, the edge of the display film 190 is prone to overflow of electronic paste. By setting a first gap between the first via 171 and the display area 110 and between the second via 181 and the display area 110, the electronic paste is prevented from flowing into the first via 171 and the second via 181 and causing corrosion, thereby improving the stability of the driving substrate 100.

[0037] like Figure 2As shown, the first distance between the first via 171 or the second via 181 and the edge of the display area 110 near the first via 171 or the second via 181 is h1, which satisfies that h1 is greater than or equal to 200um. Since the cut display film 190 has some space damage at the edge, resulting in some electronic paste overflow, by setting a first distance greater than or equal to 200um between the target via and the display area 110, electronic paste is prevented from entering the first via 171 or the second via 181 and thus corroding the first metal layer 101 or the second metal layer 102, causing the first metal layer 101 or the second metal layer 102 to break, thereby affecting the normal use of multiple pixel units 130.

[0038] In some embodiments, the dielectric layer 192 includes a plurality of accommodating spaces, which are filled with electronic paste. Since the display film 190 needs to be cut before it is set, the plurality of accommodating spaces facilitate the storage of electronic paste after cutting.

[0039] The thin-film transistor 140 includes a gate 141, a semiconductor 142, a source 143, and a drain 144. The gate 141 and the first metal layer 101 are located in the same structural layer, meaning that the gate 141 and the first metal layer 101 are fabricated from the same metal layer. The source 143, drain 144, and second metal layer 102 are located in the same structural layer, meaning that the source 143, drain 144, and second metal layer 102 are fabricated from the same metal layer. A first insulating layer 170 is also located on the side of the gate 141 facing the semiconductor 142. Two insulating layers 180 are located between the source 143, the drain 144, and the driving electrode 150. A semiconductor 142 is located between the source 143 and the drain 144. In the thickness direction of the driving substrate 100, the semiconductor 142 is also located between the second insulating layer 180 and the first insulating layer 170. A through-hole 161 is formed in the second insulating layer 180 corresponding to the drain 144. The drain 144 and the driving electrode 150 are electrically connected through the through-hole 161. The semiconductor 142 is disposed between the gate 141 and the source 143. The thin-film transistor 140 is connected to the driving electrode 150 through the drain 144 to control the driving electrode 150.

[0040] In some embodiments, the driving substrate 100 further includes a leveling layer 104, which is disposed between the second insulating layer 180 and the driving electrode 150. The leveling layer 104 is disposed to form a flat surface to facilitate the placement of the driving electrode 150. The leveling layer 104 has an opening at a position corresponding to the connecting hole 161 to facilitate the electrical connection between the driving electrode 150 and the drain electrode 144.

[0041] In summary, in the electronic paper display device, because the edges of the display film 190 need to be cut during the process of setting the display film 190, the accommodating space at the edge of the dielectric layer 192 on the display film 190 is damaged, resulting in the overflow of electronic paste in the accommodating space. When the electronic paste overflows, it easily flows to the static neutralization section and enters the first via 171 or the second via 181, causing corrosion of the first metal layer 101 in the first via 171 or the second metal layer 102 in the second via 181, resulting in wire breakage of the first metal layer 101 or the second metal layer 102, thereby affecting the normal use of the driving substrate 100. In the embodiments of this application, by setting a first gap of greater than or equal to 200um between the edge of the display area 110 and the first via 171 or the second via 181, the electronic paste is prevented from entering the first via 171 or the second via 181 and causing corrosion, so as to maintain the normal use of the driving substrate 100.

[0042] In a second aspect, this utility model also provides an electronic paper display device. It is understood that this electronic paper display device is the same as the electronic paper display device described above, and will not be described again here.

[0043] In a third aspect, this utility model also provides an electronic device, which includes an electronic paper display device or a driving substrate 100 of an electronic paper display device as described in any of the foregoing claims. It is understood that the electronic paper display device is the same as the electronic paper display device described in the foregoing claims, and the driving substrate 100 of the electronic paper display device is the same as the driving substrate 100 of the electronic paper display device described in the foregoing claims, and will not be described again here.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A drive substrate, characterized by, The driving substrate has a display area and a non-display area. The display area is provided with a plurality of pixel units. Each pixel unit includes a thin film transistor and a driving electrode electrically connected to the thin film transistor. The non-display area is formed on the outer periphery of the display area. The non-display area is provided with an electrostatic ring, which includes a first metal layer, a first insulating layer, a second metal layer, a second insulating layer, and a third metal layer stacked sequentially along the thickness direction of the driving substrate. The first insulating layer is provided with a first via, and the second insulating layer is provided with a second via. The first metal layer is electrically connected or electrically coupled to the third metal layer at the first via, and the second metal layer is electrically connected or electrically coupled to the third metal layer at the second via. There is a first distance between either the first via or the second via and the edge of the display area.

2. The driving substrate according to claim 1, characterized in that, The first distance between either the first via or the second via and the edge of the display area is h1, which satisfies that the first distance h1 is greater than or equal to 200um.

3. The driving substrate according to claim 2, characterized in that, The driving substrate includes a plurality of electrostatic rings, which are disposed around the outer periphery of the display area.

4. The driving substrate according to claim 1, characterized in that, The thin-film transistor includes a gate, a semiconductor, a source, and a drain. The second insulating layer is also located between the thin-film transistor and the driving electrode. A through hole is also formed on the second insulating layer corresponding to the position of the drain. The drain and the driving electrode are electrically connected at the through hole.

5. The driving substrate according to claim 4, characterized in that, The gate and the first metal layer are located in the same structural layer, and the source, the drain and the second metal layer are located in the same structural layer.

6. The driving substrate according to claim 5, characterized in that, The driving substrate further includes a leveling layer, which is disposed between the second insulating layer and the driving electrode, and the leveling layer has an opening at the position corresponding to the connecting hole.

7. The driving substrate according to claim 4, characterized in that, The semiconductor is located between the source and the drain.

8. The driving substrate according to claim 4, characterized in that, In the thickness direction of the driving substrate, the semiconductor is also located between the first insulating layer and the second insulating layer.

9. An electronic paper display device, characterized in that, Includes a display film and a driving substrate as described in any one of claims 1-8; The display film includes a dielectric layer and a top electrode. The dielectric layer includes an electronic paste and is located between the top electrode and the driving substrate.

10. An electronic device, characterized in that, Includes the electronic paper display device as described in claim 9.

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