Electronic Paper Screen Corner Layout for Display Area Retention
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Solution Overview
Problem
The presence of an ear hole in electronic paper screens results in irregular shapes and increased dimensions, leading to reduced screen-to-body ratio, decreased cut numbers, and increased material costs, while corner-missing designs cause a loss of display area.
Innovation Solution
Optimize the corner-missing design by using a thin-film transistor substrate with a polygonal display area featuring a vacant corner, where electrical connection points are positioned to minimize display area loss through equidistant regional boundaries and specific distance settings to prevent edge damage and ink leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an ear hole is used for electrical connection, then the electrical connection between thin-film transistor substrate and electronic paper film is achieved, but the shape becomes irregular and the screen-to-body ratio is reduced
Solution Approach 1:
The patent extracts the electrical connection function from the traditional ear hole structure and relocates it to the corner-missing design. The electrical connection point is positioned at the corner of the display area, eliminating the need for a separate ear hole while maintaining the electrical connection function between the thin-film transistor substrate and electronic paper film.
Solution Approach 2:
Instead of adding an ear hole to achieve electrical connection (conventional approach), the patent inverts the approach by making the corner itself the electrical connection point. The corner-missing design serves dual purposes: both as the electrical connection interface and as part of the display area boundary, thus eliminating the need for separate connection structures.
2Ease of manufacture
If an ear hole is used for electrical connection, then the electrical connection is achieved, but the cut number decreases and material costs increase
Solution Approach 1:
The patent extracts the electrical connection function from the ear hole structure and integrates it into the corner-missing design. This eliminates the need for separate ear hole processing steps and allows for more efficient cutting and arrangement of the electronic paper film, thereby increasing the cut number and reducing material waste.
Solution Approach 2:
The patent merges the electrical connection function with the corner-missing design. The electrical connection point is positioned at the corner, combining the mechanical structure (corner cutout) with the electrical function (connection point), thereby eliminating the need for separate ear hole structures and improving manufacturing efficiency.
3Shape
If corner-missing design is applied, then the ear hole is eliminated and shape regularity is improved, but display area is lost
Solution Approach 1:
The patent applies parameter changes by optimizing the size and position of the corner-missing design. The corner cutout dimensions are carefully controlled to minimize display area loss while maintaining its function as an electrical connection point. The equidistant portion parameters are adjusted to achieve the optimal balance between shape regularity and display area preservation.
Solution Approach 2:
The patent uses a partial corner-missing design rather than removing entire corners. The equidistant portion is designed to extend only to the necessary extent to provide electrical connection functionality, avoiding excessive removal of display area while still achieving the desired shape regularity and electrical connection purposes.
4Device complexity
If corner-missing design is applied, then the ear hole is eliminated and manufacturing complexity is reduced, but display area is lost
Solution Approach 1:
The patent optimizes the parameters of the corner-missing design, including the size, shape, and position of the equidistant portion. By carefully controlling these parameters, the design achieves structural simplification and electrical connection functionality while minimizing the loss of display area. The equidistant portion parameters are specifically tuned to balance complexity reduction with area preservation.
Data Source
Figure 1~2
Figure 3a1~3a2
Figure 3b1~3b2
AI summary
An electronic paper screen, an electronic paper display and an electronic terminal, relating to the technical field of electronic display. The electronic paper screen includes a thin-film transistor substrate (1), an electronic paper film (2) and an electrical connection point (14). The thin-film transistor substrate (1) includes a polygonal display area (11) with at least one corner reserved with a vacant area. Each vacant area is defined by a first regional boundary (8). The electrical connection point (14) is disposed on the electronic paper film (2) at a position corresponding to the vacant area and configured to connect an electrode on the thin-film transistor substrate (1) to an electrode on the electronic paper film (2). An outer contour of the electrical connection point (14) forms a second regional boundary (9) on a plane of the thin-film transistor substrate (1). A portion of the second regional boundary (9) corresponding to the first regional boundary (8) is an equidistant portion. A minimum distance from any point on the equidistant portion to the first regional boundary (8) is equal. The loss of the display area of the display area (11) is reduced by the limit that the minimum distance is equal..