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 has a display area and a non-display area formed on it. 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. A display frame is provided at the edge of the display area, and a second via for electrical connection or electrical coupling is formed on the display frame. The non-display area is provided with an electrostatic ring, which includes a first via for electrical connection or electrical coupling. A first barrier film at least covers the first via, and a second barrier film at least covers the second via.

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 discharge device is installed in the electronic paper device to discharge static electricity. However, because the electrophoretic paste can easily overflow into the electrostatic discharge device during the electrophoretic layer formation, 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 solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a driving substrate, an electronic paper display device, and an electronic device, which prevents or reduces the corrosion of metal lines inside the electrostatic device by setting a first barrier film.

[0005] According to a first aspect of the present invention, a driving substrate is provided with a display area and a non-display area. A plurality of pixel units are provided in the display area. Each pixel unit includes a thin film transistor and a driving electrode electrically connected to the thin film transistor. A display frame is provided at the edge of the display area. A second via for electrical connection or electrical coupling is formed on the display frame.

[0006] The non-display area is provided with an electrostatic ring, and the electrostatic ring includes a first via for electrical connection or electrical coupling;

[0007] A first barrier membrane, wherein the first barrier membrane at least covers the first through-hole;

[0008] A second barrier membrane, wherein the second barrier membrane at least covers the second via.

[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 first barrier film is configured as a frame structure and disposed on the outer periphery of the display area.

[0011] In some embodiments, 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, the second insulating layer is provided with a first 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 first via.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] In some embodiments, the semiconductor is located between the source and the drain;

[0016] In the thickness direction of the driving substrate, the semiconductor is also located between the first insulating layer and the second insulating layer.

[0017] A second aspect of 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;

[0018] 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.

[0019] A third aspect of this application provides an electronic device, which includes the electronic device described in the second aspect above.

[0020] As can be seen from the above embodiments, this application prevents electronic paste or other impurities in the dielectric layer from entering the first via and corroding the metal in the first via, thus causing line breakage, by setting a first barrier film to cover the first via of the electrostatic ring. By setting a second barrier film to cover the second via on the display frame, it prevents electronic paste or other impurities in the dielectric layer from entering the second via and corroding the metal in the second via, thus causing line breakage, thereby improving the yield of the electronic paper display device.

[0021] 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

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a schematic diagram of the planar structure of an electronic paper display device in related technologies;

[0024] Figure 2 This is a schematic diagram of the planar structure of the electronic paper display device in an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the planar structure of the electrostatic ring in an embodiment of the present invention;

[0026] Figure 4 This is a cross-sectional view of one of the pixel units in an embodiment of the present invention.

[0027] 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; 190, display film; 191, first electrode; 192, dielectric layer; 200, electrostatic ring; 210, first barrier film; 220, second barrier film; 230, display frame; 240, second via. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] The display film 190 includes a dielectric layer 192 and a first electrode 191, wherein the dielectric layer 192 includes an electronic paste.

[0035] like Figure 3 As shown, a display area 110 and a non-display area 120 are formed on the driving substrate 100. A plurality of pixel units 130 are disposed in the display area 110. Each pixel unit 130 includes a thin film transistor 140 and a driving electrode 150. A dielectric layer 192 is located between the first electrode 191 and the driving electrode 150. An insulating layer is disposed between the driving electrode 150 and the thin film transistor 140. A through hole 161 is formed in the insulating layer. The driving electrode 150 is electrically connected to the thin film transistor 140 at the through hole 161.

[0036] 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.

[0037] The non-display area 120 is provided with an electrostatic ring 200, which includes a first via 171 for electrical connection or coupling. A first barrier film 210 covers at least a portion of the first via 171 and is located between the electrostatic ring 200 and the dielectric layer 192. Since the display film 190 needs to be cut during its fabrication, electronic paste can easily overflow from its edges. By providing the first barrier film 210 to shield the first via 171, electronic paste is prevented from entering the via 171 and causing metal corrosion, thereby improving the yield rate.

[0038] The electronic paper display device also includes a display frame 230, which is disposed on the outer periphery of the display substrate. A second via 240 for connecting to a power source is formed on the display frame 230. The display frame 230 is used to transmit light signals when powered on. The display film 190 also covers the display frame 230. The electronic paper display device also includes a second barrier film 220, which at least covers the second via 240 and is located between the display frame 230 and the dielectric layer 192. The display frame 230 is used to transmit light signals when powered through the second via 240, indicating the position of the display area 110. The second barrier film 220 covers the second via 240, thereby preventing electronic paste or other impurities from entering the second via 240 and causing corrosion and line breaks.

[0039] Multiple electrostatic rings 200 are arranged around the outer periphery of the display area 110. The first barrier film 210 is a frame-shaped film and is arranged around the outer periphery of the display area 110 to protect the multiple electrostatic rings 200 located on the outer periphery of the display area 110.

[0040] 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 stacked sequentially along the thickness direction of the driving substrate 100. The first insulating layer 170 is provided with a first via 171, the second insulating layer 180 is provided with a first via 171, the first metal layer 101 is electrically connected or electrically coupled to the third metal layer 103 at the first via 171, and the second metal layer 102 is electrically connected or electrically coupled to the third metal layer 103 at the first via 171.

[0041] 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.

[0042] In some embodiments, the driving substrate 100 further includes a leveling layer 104, which is disposed between the thin film transistor 140 and the driving electrode 150. The leveling layer 104 is disposed to form a flat surface, which facilitates the placement of the driving electrode 150.

[0043] 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 is easy to flow into the first via 171 on the electrostatic ring 200 and the second via 240 on the display frame 230, which causes corrosion of the metal layer in the first via 171 and the second via 240, thereby affecting the normal use of the driving substrate 100. In the embodiments of this application, by setting a first barrier film 210 on the electrostatic ring 200 and a second barrier film 220 on the second via 240 of the display frame 230, the first barrier film 210 blocks the first via 171 and the second barrier film 220 blocks the second via 240, thereby preventing or reducing the possibility of electronic paste flowing into the first via 171 or the second via 240, so as to improve the stability of the normal use of the driving substrate 100.

[0044] 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.

[0045] In a third aspect, this utility model also provides an electronic device, which includes 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 will not be described again here.

[0046] 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 driving substrate, characterized in that, A display area and a non-display area are formed on the driving substrate. A plurality of pixel units are disposed in the display area. Each pixel unit includes a thin film transistor and a driving electrode electrically connected to the thin film transistor. A display frame is disposed at the edge of the display area. A second via for electrical connection or electrical coupling is formed on the display frame. The non-display area is provided with an electrostatic ring, and the electrostatic ring includes a first via for electrical connection or electrical coupling; A first barrier membrane, wherein the first barrier membrane at least covers the first through-hole; A second barrier membrane, wherein the second barrier membrane at least covers the second via.

2. The driving substrate according to claim 1, characterized in that, The driving substrate includes a plurality of electrostatic rings, which are disposed around the outer periphery of the display area.

3. The driving substrate according to claim 2, characterized in that, The first barrier film is configured as a frame structure and is disposed on the outer periphery of the display area.

4. The driving substrate according to claim 1, characterized in that, 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, the second insulating layer is provided with a first 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 first via.

5. The driving substrate according to claim 4, 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.

6. The driving substrate according to claim 5, 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.

7. The driving substrate according to claim 6, 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.

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