Light-Emitting Substrate Wiring Layout for Narrow Display Bezels
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Solution Overview
Problem
Existing light-emitting substrates with mini or micro LEDs face challenges in reducing the width of the non-display region, which hinders the implementation of narrow frame designs due to oblique wiring requirements that increase the frame size.
Innovation Solution
A light-emitting substrate design featuring a plurality of light-emitting units arranged in an N*M array with intersecting directions, utilizing oblique voltage lines and transmission lines that connect across rows, allowing for efficient electrical connection without extending in a straight line, thereby reducing the oblique wiring region and frame size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oblique voltage lines are used to connect light-emitting units, then electrical connection efficiency is improved, but the width of the non-display region increases
Solution Approach 1:
The voltage line is divided into multiple segments: a first voltage line extending in the row direction, a second voltage line extending in the column direction, and a third voltage line extending obliquely. These segmented lines work together to provide electrical connection while controlling the overall footprint of the non-display region.
Solution Approach 2:
The patent introduces an oblique extension direction that is neither purely row-directional nor column-directional. This dimensional change allows the voltage line to efficiently connect light-emitting units while the folding structure manages the spatial occupation, effectively resolving the contradiction between connection efficiency and frame width.
2Device complexity
If the voltage line extends obliquely to connect light-emitting units, then the number of wiring layers is reduced, but the frame size increases
Solution Approach 1:
Multiple voltage lines (first, second, and third voltage lines) are merged into a unified folding structure that shares common extension directions. This merging reduces the need for additional wiring layers while the optimized path configuration minimizes the frame size occupation.
Solution Approach 2:
The voltage line follows a folding path with curved transitions between different extension directions (row direction, column direction, oblique direction). This curved routing optimizes space utilization and reduces the overall frame size compared to sharp angular transitions.
Data Source
AI summary
A light-emitting substrate and a display device are provided. Each light-emitting unit includes a first voltage terminal. The first voltage line includes a first portion, a first connecting portion, and a second portion. The first portion is electrically connected with first voltage terminals of a first row to a Y-th row of light-emitting units in a corresponding column. An extension direction of a second portion of the first voltage line has an included angle with both the first direction and the second direction. The first connecting portion is at boundary of the Y-th row and a (Y+1)-th row of light-emitting units. The first transmission line is electrically connected with first voltage terminals of the (Y+1)-th row to an N-th row of light-emitting units in a corresponding column, and is electrically connected with the first connecting portion of the first voltage line corresponding to light-emitting units of a corresponding column.