Display Substrate Active Pattern Segmentation for ESD Uniformity

Solution Overview

Problem

The continuous introduction of under-screen display technology leads to changes in the pixel layout environment of display substrates, resulting in display defects such as vertical Mura, due to structural differences in active patterns during processes like electrostatic discharge (ESD).

Innovation Solution

A display substrate design that includes a base substrate with pixel circuits arranged in an array, featuring active patterns that are disconnected at specific positions to form independent active sub-patterns. These sub-patterns are connected through shared connection portions at disconnection points, ensuring uniform ESD environments across the substrate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If active patterns are continuously connected to ensure signal transmission, then device functionality is maintained, but ESD environment differences cause display defects such as vertical Mura

Engineering Contradiction:

Improvedisplay uniformityVSAvoidESD environment differences

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The active pattern is divided into multiple active sub-patterns by introducing disconnection positions. These sub-patterns are independently connected to signal lines through connection portions, which segments the continuous active pattern into discrete functional units. This segmentation allows each sub-pattern to experience more uniform ESD environments, thereby reducing display defects like vertical Mura while maintaining overall device functionality.

Inventive Principle:

Principle #1Segmentation

2Reliability

If disconnection positions are introduced to form active sub-patterns, then ESD environment uniformity is improved, but structural complexity increases

Engineering Contradiction:

ImproveESD environment uniformityVSAvoidactive pattern structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The active pattern is divided into multiple active sub-patterns by introducing disconnection positions. These sub-patterns are independently connected to signal lines through connection portions, which segments the continuous active pattern into discrete functional units. This segmentation allows each sub-pattern to experience more uniform ESD environments, thereby reducing display defects like vertical Mura while maintaining overall device functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Connection portions serve as intermediary structures that link the active sub-patterns to the signal lines. These connection portions act as mediators between the segmented active patterns and the signal transmission lines, enabling reliable electrical connections while maintaining the benefits of segmentation for ESD uniformity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If active patterns are disconnected at specific positions, then display defects are reduced, but manufacturing precision requirements increase

Engineering Contradiction:

Improvedisplay defect reductionVSAvoiddisconnection position alignment

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The active pattern is divided into multiple active sub-patterns by introducing disconnection positions. These sub-patterns are independently connected to signal lines through connection portions, which segments the continuous active pattern into discrete functional units. This segmentation allows each sub-pattern to experience more uniform ESD environments, thereby reducing display defects like vertical Mura while maintaining overall device functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Connection portions serve as intermediary structures that link the active sub-patterns to the signal lines. These connection portions act as mediators between the segmented active patterns and the signal transmission lines, enabling reliable electrical connections while maintaining the benefits of segmentation for ESD uniformity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250120266A1Display substrate and display device

Publication Date: 2025.04.10 CHENGDU BOE OPTOELECTRONICS TECH CO LTD

AI summary

A display substrate and a display device are provided. The display substrate includes a base substrate and a plurality of pixel circuits, the plurality of pixel circuits are arranged on the base substrate in an array, the plurality of pixel circuits include a plurality of active patterns, each of the plurality of active patterns extends along a first direction, the plurality of active patterns are arranged along a second direction, adjacent active patterns are spaced apart from each other in the second direction, and at least one of the plurality of active patterns comprises at least one disconnection position to form a plurality of active sub-patterns independent of each other.