Display Panel Signal Line Overlap Layout for Narrow Bezels
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Solution Overview
Problem
The increasing demand for narrow bezel and full screen designs in display panels leads to higher wiring density, posing challenges in manufacturing and requiring more stringent process controls to avoid short circuits.
Innovation Solution
A display panel design featuring a driving circuit in the periphery with overlapping orthogonal projections of signal lines and a metal portion, utilizing insulating layers to separate and insulate electronic components, allowing for reduced wiring density without increasing the circuit's density, and incorporating openings in electrode power supply lines to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the periphery area of the display panel is reduced to achieve narrow bezel design, then the screen area ratio is improved, but the wiring density in the display panel increases
Solution Approach 1:
The patent applies dimensionality change by moving signal lines from the planar perimeter to the vertical dimension, allowing them to pass through the driving circuit layer via through-holes. This enables signal transmission without occupying peripheral wiring space, effectively resolving the contradiction between reduced periphery area and increased wiring density.
Solution Approach 2:
The patent implements nesting by integrating signal lines within the driving circuit structure. The signal lines are embedded through the driving circuit layer, nesting the signal transmission path inside the existing circuit architecture rather than placing it alongside, thus reducing peripheral space requirements while maintaining wiring functionality.
2Length of stationary object
If signal lines are placed in the periphery to reduce wiring length, then the wiring space is compressed, but signal lines may occupy driving circuit space and cause short circuits
Solution Approach 1:
The patent extracts signal lines from the traditional peripheral routing path and relocates them through the driving circuit layer via through-holes. This separation removes signal lines from the planar perimeter where they could interfere with driving circuits, eliminating the short circuit risk while maintaining efficient signal transmission paths.
Solution Approach 2:
The patent introduces through-holes as intermediary structures that enable signal lines to pass through the driving circuit layer without direct contact. These through-holes act as mediators, allowing signal transmission while maintaining electrical isolation and preventing short circuits between signal lines and driving circuit components.
3Area of stationary object
If wiring density is increased to achieve narrow bezel, then the screen area ratio is improved, but manufacturing precision requirements increase
Solution Approach 1:
By transitioning signal line routing from 2D peripheral placement to 3D vertical penetration through the driving circuit layer, the patent reduces the complexity of high-density peripheral wiring. This dimensional change simplifies the manufacturing process by eliminating the need for extremely precise high-density peripheral trace routing, thereby reducing manufacturing precision requirements while maintaining narrow bezel design.
Data Source
AI summary
A display panel and a display device are provided. The display panel has a display area. The display panel includes: a base substrate; a driving circuit and at least one signal line on the base substrate; and at least one insulating layer between the driving circuit and the at least one signal line. The driving circuit is disposed in a periphery of the display area; and an orthogonal projection of at least one of the signal lines on the base substrate has an overlapping area with an orthogonal projection of the driving circuit on the base substrate.