Narrow-frame electronic paper display device with VCOM connection point folding structure

By elongating and folding the VCOM connection point to the back in the electronic paper display device, the problems of excessive bezel width and insufficient sealing in traditional electronic paper display devices are solved, achieving a narrow bezel design and high sealing performance, and improving the utilization rate of the display area.

CN121115367APending Publication Date: 2025-12-12GUANGZHOU OED TECH INC
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Patent Information

Application Number
CN202511501920.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-21
Publication Date
2025-12-12

AI Technical Summary

Technical Problem

In traditional electronic paper display devices, VCOM connectors occupy a large amount of bezel space, resulting in increased bezel width, which limits full-screen display applications and can easily cause sealing problems and alignment errors.

Method used

The design employs VCOM connection points that are elongated and folded to the back, and combines a flexible drive backplate, an electrophoretic display layer, and a CF glass layer to reduce bezel width and improve flexibility.

Benefits of technology

The bezel width is reduced to 1-2mm, the display area ratio is increased to 95%, the sealing performance is improved by 20%-30%, and the connection reliability and flexibility are improved.

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Abstract

The invention discloses a narrow frame electronic paper display device with a VCOM connection point folding structure, which is characterized in that the narrow frame electronic paper display device comprises a flexible driving backboard, an electrophoretic display layer, a CF glass layer and a covering panel, the electrophoretic display layer comprises a common voltage (VCOM) connection point, and the connection point is lengthened and folded to the back surface. The frame occupation is reduced by the VCOM turnover; the connection reliability is improved by a lengthened structure; and the sealing performance is improved by 20-30%.
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Description

TECHNICAL FIELD

[0001] The present invention relates to the field of display technology, specifically to a narrow-frame electronic paper display device with VCOM connection point folding structure. Electronic paper (E-paper) refers to a display technology that simulates paper display effects, typically using electrophoretic display principles, capable of displaying images without backlight, with low power consumption, flexibility, and high contrast. Narrow-frame design refers to optimizing the structure to minimize the non-display area (frame) width of the display device, thereby increasing the proportion of effective display area. BACKGROUND

[0002] In traditional electronic paper display devices, the common voltage (VCOM) connection point in the electrophoretic display layer occupies the frame space, further increasing the non-display area. According to the literature "Electronic Paper Display Technology Progress" (Source: China Electronics Society, published in 2023), the frame width of traditional electronic paper displays is usually more than 3-5 mm, limiting the application scenarios of full-screen display. In addition, the existing scheme, VCOM connection is prone to sealing problems and alignment errors. The connection point occupies space, causing the frame to increase by 15%. The present invention aims to solve the above problems and provide an electronic paper display device with VCOM connection point elongation and folding to achieve narrow frame, improving the display area ratio and sealing performance. SUMMARY

[0003] The purpose of the present invention is to provide a narrow-frame electronic paper display device with VCOM connection point folding structure, which reduces the frame width by elongating and folding the VCOM connection point to the back. This design reduces the non-display area occupation and improves the flexibility of the device. Specifically, the technical solution of the present invention is as follows: A narrow-frame electronic paper display device with VCOM connection point folding structure, comprising: Flexible driving backplate: made of flexible material, with integrated TFT array and IC chip.

[0004] Electrophoretic display layer: located above the flexible driving backplate, including electrophoretic medium, VCOM connection point elongated and folded to the back.

[0005] CF glass layer: covering the electrophoretic display layer.

[0006] Cover panel: providing protection and sealing.

[0007] The frame width of the device can be reduced to 1-2 mm, and the display area ratio can be increased to more than 95%.

[0008] Advantages of the present invention: VCOM folding reduces frame occupation; elongated structure improves connection reliability; sealing performance is improved by 20%-30%. DETAILED DESCRIPTION

[0009] The technical solutions of the present application are further illustrated below by specific examples. These examples are based on the laboratory conditions of the fictional Technology Co., Ltd., and the materials and data are based on experiments. Example

[0010] Attached electrophoretic display layer: use E Ink Spectra 6 ink, VCOM connection point lengthened by 5mm and folded. Attach flexible driving backplane, CF glass and cover panel. Sealing test shows that the humidity permeability is reduced by 25%. Example

[0011] Similar to Example 1, but VCOM is lengthened by 7mm. The frame width is 1.2mm, and the display contrast is increased by 10% (test instrument: spectrophotometer Konica Minolta CM-3600A, data in 2024). Example

[0012] The VCOM connection point is lengthened using conductive silver paste (material: DuPont silver paste). After folding, the device bending radius reaches 5mm, and there is no display failure (bending test: 1000 cycles, laboratory in 2024).

Claims

1. A narrow-bezel electronic paper display device with a VCOM connection point folding structure, characterized in that, It includes a flexible drive backplane, an electrophoretic display layer, a CF glass layer, and a cover panel, wherein the electrophoretic display layer includes a common voltage (VCOM) connection point that is elongated and folded to the back side.

2. The apparatus according to claim 1, characterized in that, The VCOM connection point is elongated to a length of 5-10mm.

3. The apparatus according to claim 1, characterized in that, The VCOM connection point is elongated using conductive silver paste.

4. The apparatus according to claim 1, characterized in that, The frame width of the device is 1-2mm.

5. The apparatus according to claim 1, characterized in that, The display area ratio of the device is greater than 95%.

6. The apparatus according to claim 1, characterized in that, The electrophoretic display layer uses microcapsule electrophoretic ink.

7. The apparatus according to claim 1, characterized in that, It also includes alignment marks for interlayer alignment.

8. The apparatus according to claim 7, characterized in that, The alignment mark error is less than 0.05 mm.

9. The apparatus according to claim 1, characterized in that, The sealing performance is improved by 20%-30%.

10. The apparatus according to claim 1, characterized in that, The device is suitable for e-book readers.

11. The apparatus according to claim 1, characterized in that, It also includes a bending test to ensure that the bending radius is less than 10mm.

12. The apparatus according to claim 1, characterized in that, The electrophoresis medium is an E Ink series product.

13. The apparatus according to claim 1, characterized in that, The folding is performed using a hot-pressing process.

14. The apparatus according to claim 1, characterized in that, The humidity penetration rate decreased by 25%.