US-20260126698-A1 - ELECTRONIC PAPER SCREEN WITH UNFILLED CORNER IN DISPLAY AREA

Abstract

The present disclosure provides an electronic paper screen with an unfilled corner in a display area, including a thin film transistor substrate and an electronic paper film A polygonal display area is formed on the thin film transistor substrate. A vacant area is reserved in at least one corner of the display area. An electrical connection point is provided on the electronic paper film at a position corresponding to at least one vacant area, and configured to connect an electrode of the thin film transistor substrate to an electrode of the electronic paper film. The present disclosure solves the technical problem that the placement of the electrical connection point causes irregular shaping of the electronic paper film and the protective film, leading to an increase in the size and cost of the electronic paper screen.

Inventors

• Yanchen Li
• Jianguo Zhao
• Shiguo HOU

Assignees

• Hanshow Technology Co., Ltd.

Dates

Publication Date

20260507

Application Date

20221208

Priority Date

20221009

Claims (14)

1. 1 . An electronic paper screen with an unfilled corner in a display area, comprising a thin film transistor substrate and an electronic paper film, wherein a polygonal display area is formed on the thin film transistor substrate, and a vacant area is reserved in at least one corner of the display area; and an electrical connection point is provided on the electronic paper film at a position corresponding to at least one vacant area, and configured to connect an electrode of the thin film transistor substrate to an electrode of the electronic paper film.
2. 2 . The electronic paper screen with an unfilled corner in a display area according to claim 1 , wherein there are a plurality of the vacant areas, and the electronic paper film is provided with electrical connection points at positions respectively corresponding to the vacant areas.
3. 3 . The electronic paper screen with an unfilled corner in a display area according to claim 1 , wherein a plurality of electrical connection points are provided on the electronic paper film at positions corresponding to one vacant area.
4. 4 . The electronic paper screen with an unfilled corner in a display area according to claim 1 , wherein on a plane where the thin film transistor substrate is located, two adjacent sides close to the same corner of the display area are connected by a straight line, to partition the vacant area at the corner of the display area.
5. 5 . The electronic paper screen with an unfilled corner in a display area according to claim 1 , wherein on a plane where the thin film transistor substrate is located, two adjacent sides close to the same corner of the display area are connected by an arc, to partition the vacant area at the corner of the display area.
6. 6 . The electronic paper screen with an unfilled corner in a display area according to claim 1 , wherein on a plane where the thin film transistor substrate is located, two adjacent sides close to the same corner of the display area are connected by a plurality of line segments, to partition the vacant area at the corner of the display area.
7. 7 . The electronic paper screen with an unfilled corner in a display area according to claim 1 , wherein the electrical connection point is dot-shaped or line-shaped.
8. 8 . The electronic paper screen with an unfilled corner in a display area according to claim 1 , wherein a non-display area is formed on the thin film transistor substrate, and a border area is formed between the non-display area and the display area.
9. 9 . The electronic paper screen with an unfilled corner in a display area according to claim 8 , wherein the non-display area is provided to surround the display area, and the border area, which is in a ring shape, is connected between the non-display area and the display area to demarcate the non-display area and the display area.
10. 10 . The electronic paper screen with an unfilled corner in a display area according to claim 8 , wherein the electronic paper film is stacked with the thin film transistor substrate, and covers the display area and the border area.
11. 11 . The electronic paper screen with an unfilled corner in a display area according to claim 9 , wherein the electrode of the thin film transistor substrate is located in the vacant area, the electronic paper film is provided with an ear hole at a position corresponding to the vacant area to expose the electrode of the electronic paper film to the outside, and the electric connection point is located at the ear hole to connect the electrode of the thin film transistor substrate to the electrode of the electronic paper film.
12. 12 . The electronic paper screen with an unfilled corner in a display area according to claim 11 , further comprising a protective film, which is stacked with the electronic paper film and the thin film transistor substrate and covers the electronic paper film.
13. 13 . The electronic paper screen with an unfilled corner in a display area according to claim 12 , wherein edges of the protective film and the electronic paper film are provided with an edge sealing structure.
14. 14 . The electronic paper screen with an unfilled corner in a display area according to claim 13 , wherein the thin film transistor substrate comprises a glass board and a circuit board, a thin film crystal array and a driving circuit are provided on the glass board, an integrated circuit is provided in the edge sealing structure, the driving circuit is connected to the integrated circuit through the electrical connection point, and the integrated circuit is connected to an external control circuit through the circuit board.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present disclosure claims priority to Chinese Invention Patent Application No. 202222642433.X, filed Oct. 9, 2022, and entitled “electronic paper screen with unfilled corner in display area”. TECHNICAL FIELD The present disclosure relates to the field of electronic display technologies, and particularly to an electronic paper screen with an unfilled corner in a display area. BACKGROUND The electronic-paper screen is a type of display screen manufactured by an electrophoretic display technology. It achieves the effect of displaying images by applying a driving voltage to each pixel through a control circuit on a thin film transistor (TFT) substrate. As a reflective display screen, the electronic-paper screen can keep a displayed image for a long time without continuous refreshing after the image is updated, thus achieving very low power consumption. Due to its advantages such as low power consumption, wide viewing angles, high contrast, and eye protection, the electronic-paper screen is increasingly widely used in the fields of electronic shelf labels, electronic books, billboards and the like. The AA region (active display region) of a conventional electronic-paper screen is rectangular, and in order to drive an electrode (e.g., a VCOM ITO electrode) on an FPL (Electronic Paper Film), it is necessary to reserve an ear hole on a partial area extending outwards on the FPL, set an electrical connection point (Ag glue dot) in the position of the ear hole, and connect an electrode (e.g., a VCOM electrode) on the TFT substrate to an electrode (e.g., a VCOM ITO electrode) on the FPL by means of Ag glue dispensing. However, the presence of the ear hole leads to the irregular shaping of both the FPL and a PS (i.e., a protective film, which mainly includes a waterproof layer and an anti-glare layer, and is attached to the FPL for anti-glare and isolating water vapor from entering the FPL) This irregularity also increases the dimensions of the FPL, PS, and TFT. As a result, a bezel of the electronic-paper screen is widened, a screen-to-body ratio is reduced, and the cutting yield of the FPL, the PS and the TFT of the electronic-paper screen are decreased (during raw material production, to improve efficiency and reduce cost, the FPL, the PS and the TFT are cut in the form of large or master slices, and several small slices may be arranged on one large or master slice, in which one small slice is the size and the form actually required by one electronic-paper screen, and the “cutting yield” refers to the maximum number of the small slices arranged and cut on the large slice), resulting in increased material costs. Regarding the issue in related technologies where the placement of electrical connection points causes the irregular shaping of the electronic paper film and protective film, increasing the size and cost of electronic-paper screens, no effective solution has been proposed so far. SUMMARY The objective of the present disclosure is to provide an electronic paper screen with an unfilled corner in a display area, which can avoid the irregularity of the shape of the electronic paper film, increase the screen-to-body ratio of the electronic paper screen, and reduce costs. The objective of the present disclosure can be achieved by the following solution: The present disclosure provides an electronic paper screen with an unfilled corner in a display area, including a thin film transistor substrate and an electronic paper film. A polygonal display area is formed on the thin film transistor substrate, and a vacant area is reserved in at least one corner of the display area. An electrical connection point is provided on the electronic paper film at a position corresponding to at least one vacant area, and configured to connect an electrode of the thin film transistor substrate to an electrode of the electronic paper film. The present disclosure has the following advantageous effects: In the electronic paper screen with an unfilled corner in a display area, the vacant area is reserved in at least one corner of the polygonal display area on the thin film transistor substrate, and the electrical connection point is provided on the electronic paper film at a position corresponding to the vacant area. This design avoids the need to create an outward-extending ear hole on the electronic paper film and avoids placing the electrical connection point at such ear hole, thereby preventing irregular shaping of the electronic paper film, increasing the screen-to-body ratio of the electronic paper screen, and reducing costs. BRIEF DESCRIPTION OF DRAWINGS The following drawings are only intended to schematically illustrate and explain the present disclosure, rather than limiting the scope of the present disclosure. In the drawings: FIG. 1 illustrates a longitudinal cross-sectional view of an electronic paper screen with an unfilled corner in a display area according to the present disclosure