Multi-layer Wiring Structure for Display Panel Non-display Region
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Solution Overview
Problem
The existing display panel technology faces challenges in reducing the area of the non-display region to increase the screen-to-body ratio, as the preset distance between metal wirings limits the reduction of the non-display region area.
Innovation Solution
A multi-layer wiring structure is introduced, comprising a substrate, multiple wiring layers with parallel metal wirings, and insulating layers made of silicon oxide or silicon nitride, with staggered and overlapping arrangements to minimize distances and adhesion, ensuring signal interference prevention while reducing the non-display region area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer wiring structure is used, then the structure is simple, but the non-display region area is large
Solution Approach 1:
The patent transitions from a single-layer (2D) wiring structure to a multi-layer (3D) wiring structure by stacking multiple wiring layers vertically. This dimensional change allows wirings to be arranged in different spatial planes, reducing the horizontal area occupied by wirings in the non-display region while maintaining signal transmission functionality.
Solution Approach 2:
The patent divides the wiring structure into multiple separate layers (first wiring layer, second wiring layer, third wiring layer, etc.), each containing specific signal wirings. This segmentation allows different signal types to be routed in different layers, reducing interference and enabling more compact arrangement of wirings within the non-display region.
2Reliability
If the distance between metal wirings is increased to prevent signal interference, then signal interference is prevented, but the non-display region area increases
Solution Approach 1:
By moving wirings to different vertical layers, the patent reduces the horizontal distance requirement between wirings. Wirings in different layers can be positioned closer horizontally without causing interference because they are separated vertically by insulating layers, thus reducing the overall non-display region area while maintaining signal integrity.
Solution Approach 2:
The patent introduces insulating layers as intermediary structures between adjacent wiring layers. These insulating layers act as mediators that electrically isolate wirings from different layers, allowing wirings to be positioned closer together while preventing signal interference. The insulating layers enable dense wiring arrangement without compromising signal reliability.
3Area of stationary object
If the non-display region area is reduced to increase screen-to-body ratio, then screen-to-body ratio increases, but signal interference between wirings occurs
Solution Approach 1:
The patent uses vertical layering to compress the wiring structure into a smaller horizontal footprint. By arranging wirings in multiple stacked layers with staggered or overlapping projections, the non-display region area is reduced, allowing more of the panel area to be used for display while maintaining proper wiring separation through vertical insulation.
Solution Approach 2:
The patent segments wirings carrying different signals into different wiring layers, reducing electromagnetic interference between adjacent wirings. This segmentation allows wirings to be positioned closer together in the horizontal plane without causing signal interference, as interference-prone wirings are separated into different vertical layers with insulating barriers between them.
Data Source
AI summary
The present application provides a display panel and an electronic device. The display panel includes display region and a non-display region surrounding the display region. The non-display region includes: an insulating substrate; a first wiring layer disposed on the insulating substrate, and the first wiring layer includes a plurality of first metal wirings arranged in parallel; a first insulating layer covering the first wiring layer and the insulating substrate; a second wiring layer disposed on the first insulating layer, and the second wiring layer comprises a plurality of second metal wirings arranged in parallel; and a second insulating layer covering the second wiring layer and the first insulating layer; wherein a minimum distance defined between the first wiring layer and the second wiring layer is greater than or equal to a preset distance.