Serpentine Peripheral Wiring Structure for Narrow Border Displays
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Solution Overview
Problem
The existing peripheral wiring structures in display substrates are limited by process accuracy, resulting in a wide border design due to the minimum distance constraint between wirings, which hinders the achievement of a narrow border design in display devices.
Innovation Solution
A serpentine peripheral wiring structure with alternating first and second opening parts and inclined bent parts, allowing for a smaller distance between adjacent wirings without being limited by the array process accuracy, and preventing point discharge phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If serpentine wirings with right angle design are used to meet electrical requirements, then equal resistance is achieved, but the distance between adjacent wirings must be large due to Array process accuracy limitations, resulting in wide border design
Solution Approach 1:
The patent replaces the conventional right angle bent parts with inclined bent parts that have inclined surfaces. This curvature change allows the wirings to be closer together without creating sharp corners that would require larger process margins, thereby reducing the overall border width while maintaining manufacturing feasibility.
Solution Approach 2:
The patent changes the geometric parameters of the bent parts from right angles to inclined angles. By modifying the angle parameters of the bent portions, the design achieves smaller wiring spacing that is not limited by Array process accuracy, thus enabling narrow border design.
2Ease of manufacture
If right angle bent parts are used in peripheral wirings, then manufacturing is simple, but point discharge phenomena occur and the distance between wirings cannot be reduced
Solution Approach 1:
The patent replaces sharp right angle corners with inclined bent parts that have gradual transitions. This eliminates the sharp corners that cause point discharge phenomena while maintaining the serpentine shape and electrical functionality of the wirings.
Solution Approach 2:
The patent converts the potentially harmful sharp corners into beneficial inclined surfaces. By replacing the harmful right angle geometry with inclined bent parts, the design eliminates point discharge while the inclined surfaces provide smooth electron flow paths.
Data Source
AI summary
An embodiment of the present disclosure relates to the field of display technology, especially to a peripheral wiring structure of a display substrate, and a display substrate. In each two adjacent wirings on a display substrate, a first peripheral wiring structure has a first bent part which includes a first inclined surface, a first top surface, a second inclined surface; and a second peripheral wiring structure has a second bent part which includes a third inclined surface, a second top surface, a fourth inclined surface; a centerline of the second bent part is located between two adjacent first bent parts, and the third inclined surface of the second bent part is opposite to and parallel to the second inclined surface of one first bent part, and the distance between the third and second inclined surfaces is larger than that between the second and first top surfaces; the fourth inclined surface is opposite to and parallel to the first inclined surface of another first bent part, and the distance between the fourth and first inclined surfaces is larger than that between the second and first top surfaces. The distance between the adjacent peripheral wirings in the above-described display substrate may be smaller than the minimal distance of the Array process, which contributes to achieve a narrow border design of a display device.