Light-Emitting Substrate Wiring Layout for Narrow Display Bezels

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Solution Overview

Problem

Existing light-emitting substrates with mini or micro light-emitting diodes (Mini-LEDs or Micro-LEDs) face challenges in reducing the width of the non-display region, which hinders the implementation of narrow frame designs due to the need for oblique wiring regions.

Innovation Solution

The light-emitting substrate incorporates a unique arrangement of first and second voltage lines, which include oblique portions that connect to binding pins, allowing for a reduction in the oblique wiring region and thereby minimizing the non-display region's width.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of stationary object

If traditional oblique wiring arrangement is used to connect binding pins, then electrical connections are reliable, but the width of the non-display region increases

Engineering Contradiction:
Improvewidth of non-display regionVSAvoidelectrical connection reliability
Core Design Contradiction:
Length of stationary objectVSReliability

Solution Approach 1:

The patent changes the wiring arrangement from a two-dimensional planar oblique connection to a three-dimensional multi-layer structure. Conductors are distributed across multiple stacked insulating layers, with conductive patterns on each layer connecting to binding pins through vertical vias. This dimensional transition allows wires to reach binding pins without requiring large horizontal oblique regions, thus reducing the non-display region width while maintaining connection reliability.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The wiring path is segmented into multiple sections across different insulating layers. Instead of a single long oblique conductor, the electrical connection is divided into multiple shorter segments on different layers, connected by vertical vias. This segmentation allows the wiring to bypass the need for large oblique regions while maintaining reliable electrical connections through the stacked structure.

Inventive Principle:
Principle #1Segmentation

2Length of stationary object

If oblique wiring region is reduced to enable narrow frame design, then device size decreases, but wiring complexity increases

Engineering Contradiction:
Improvewidth of non-display regionVSAvoidwiring structure complexity
Core Design Contradiction:
Length of stationary objectVSDevice complexity

Solution Approach 1:

The stacked insulating layer structure serves multiple functions simultaneously: it provides electrical insulation between conductors, establishes vertical electrical connections through vias, and enables compact wiring routing. This multi-functional design reduces wiring complexity by consolidating multiple roles into a unified multi-layer architecture, making the complex wiring manageable and systematic.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent changes the structural parameters of the wiring system by introducing multiple insulating layers with different conductor patterns. Instead of using large oblique regions in a single layer, the design uses smaller conductor segments on multiple layers with controlled vertical spacing. This parameter change transforms the wiring approach from horizontal expansion to vertical stacking, reducing the non-display region width while managing complexity through standardized layer construction.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentEP4067983B1Light-emitting substrate and display device
Publication Date: 2025.04.02 BOE TECHNOLOGY GROUP CO LTD
  • EP4067983B1 patent drawingFigure 1A~1B
  • EP4067983B1 patent drawingFigure 2
  • EP4067983B1 patent drawingFigure 3~4

AI summary

A light-emitting substrate and a display device. The light-emitting substrate (10) comprises a plurality of light-emitting units (100), a plurality of first voltage lines (21), and a plurality of first transmission lines (22). The plurality of light-emitting units (100) are arranged in an array of N∗M, and each of the plurality of light-emitting units (100) comprises a first voltage end (31). The plurality of first voltage lines (21) have one-to-one correspondence to multiple columns of light-emitting units (100). The first voltage line (21) comprises a first part (211), a first connecting portion (213), and a second part (212). The first part (211) is electrically connected to first voltage ends (31) of the first to Y-th rows of light-emitting units (100) of a corresponding column. The extension direction of the second part (212) of at least one first voltage line (21) has an angle with the first direction and the second direction, respectively. The first connecting portion (213) is located at the junction of the Y-th row of light-emitting units (100) and the (Y+1)-th row of light-emitting units (100). The plurality of first transmission lines (22) have one-to-one correspondence to multiple columns of light-emitting units (100). The first transmission lines (22) are electrically connected to first voltage ends (31) of the (Y+1)-th to N-th rows of light-emitting units (100) of the corresponding column, and are electrically connected to first connecting portions (213) of the first voltage lines (21) corresponding to the of light-emitting units (100) of the corresponding column. The light-emitting substrate (10) effectively reduces the width of a non-display area.