Display Conductive Layer Routing for Thin Bezels
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Solution Overview
Problem
Existing display devices face challenges in achieving thin bezels due to wiring limitations around non-display areas or substrate openings, which hinder consumer demands for thinner designs.
Innovation Solution
A display device structure is implemented with a first conductive layer, a second conductive layer, and a third conductive layer, where the third conductive layer is disposed in the non-display area and electrically connected to the first or second conductive layer through insulating layer holes, allowing signal transmission without causing short circuits, thereby enabling thin bezels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If wirings and components surround a non-display area or opening, then the display device can function properly, but the bezel width increases and thin bezel design cannot be achieved
Solution Approach 1:
The patent transitions from planar wiring to three-dimensional wiring by utilizing multiple conductive layers (first, second, and third conductive layers) stacked vertically. The third conductive layer is positioned in the non-display area and electrically connected to the first or second conductive layer through insulating layer holes, enabling signals to route through the vertical dimension rather than expanding horizontally, thus achieving thin bezels while maintaining wiring functionality
Solution Approach 2:
The patent introduces insulating layer holes as intermediary structures that enable electrical connection between different conductive layers. These holes act as mediators allowing the third conductive layer in the non-display area to connect to the first or second conductive layer, facilitating signal transmission through the vertical stack without requiring horizontal wiring expansion
2Length of stationary object
If the third conductive layer is disposed in the non-display area and electrically connected to the first or second conductive layer, then thin bezels can be achieved, but signal transmission across limited distances must be maintained without short circuits
Solution Approach 1:
The insulating layer holes serve as controlled intermediaries that enable precise electrical connection between the third conductive layer and the first or second conductive layer. This controlled connection ensures reliable signal transmission across the limited vertical distance while the insulating layers prevent unwanted electrical contact and short circuits between adjacent conductive layers
Solution Approach 2:
The patent applies different electrical properties to different regions: the insulating layers provide electrical isolation in most areas, while the insulating layer holes provide localized electrical connection points. This local differentiation of electrical properties enables reliable signal transmission through the third conductive layer to the first or second conductive layer without causing short circuits to adjacent layers
Data Source
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AI summary
A display device includes: a substrate having a display area and non-display area; a first conductive layer disposed on the substrate and corresponding to the display area; a second conductive layer disposed on the substrate and corresponding to the display area, wherein the first and second conductive layers cross from top view; a first insulating layer disposed between the first and second conductive layers; a third conductive layer disposed on the substrate, corresponding to the non-display area, and including a first connection line; and a second insulating layer disposed between the second and third conductive layers. The first connection line electrically connects to the first or second conductive layer. The result of a sheet impedance of the first connection line divided by a sheet impedance of the first or second conductive layer is greater than 0 and less than or equal to 10.