Display Substrate Common Electrode Lead Narrow Frame Design

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Solution Overview

Problem

In display substrates, high resistance in connection lines leads to slow signal transmission, causing uneven brightness and affecting display quality, and the requirement for a narrow frame is challenging due to positioning errors in evaporation processes.

Innovation Solution

A substrate design with a common electrode lead directly connected to the common electrode, reducing resistance and ensuring a consistent contacting area, thereby improving signal transmission speed and allowing for a narrower frame without excessive distance reservations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the common electrode lead is positioned away from the working region to accommodate positioning errors in evaporation processes, then manufacturing reliability is improved, but the frame width increases and signal transmission resistance increases

Engineering Contradiction:

Improvepositioning reliabilityVSAvoidframe width

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The common electrode lead is pre-positioned adjacent to the peripheral circuit in the non-working region, establishing a fixed reference point that eliminates the need for excessive distance reservations. This preliminary positioning action enables subsequent common electrode formation with consistent contacting area while maintaining narrow frame width.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The common electrode lead serves as an intermediary element between the peripheral circuit and the common electrode. By positioning it adjacent to the peripheral circuit, it acts as a buffer that absorbs positioning variations while ensuring reliable electrical connection, thus resolving the contradiction between positioning reliability and frame width.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the common electrode lead is positioned away from the working region to accommodate positioning errors, then manufacturing reliability is improved, but signal transmission resistance increases

Engineering Contradiction:

Improvepositioning reliabilityVSAvoidsignal transmission resistance

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The common electrode lead is pre-positioned adjacent to the peripheral circuit, establishing optimal electrical connection geometry from the outset. This preliminary action ensures minimal current path length and consistent contacting area, reducing signal transmission resistance while maintaining positioning reliability through the fixed reference structure.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If excessive distance is reserved for the common electrode lead to accommodate positioning errors, then positioning reliability is improved, but the frame becomes wider and signal transmission speed decreases

Engineering Contradiction:

Improvepositioning reliabilityVSAvoidsignal transmission speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The common electrode lead is pre-positioned adjacent to the peripheral circuit, establishing a fixed reference point that eliminates the need for excessive distance reservations. This preliminary action enables the common electrode to be formed with consistent contacting area, ensuring optimal electrical connection and fast signal transmission while maintaining positioning reliability.

Inventive Principle:

Principle #10Preliminary action

4Length of moving object

If the common electrode lead is positioned close to the working region, then frame width is reduced and signal transmission resistance is reduced, but positioning errors may affect contacting area consistency

Engineering Contradiction:

Improveframe widthVSAvoidcontacting area consistency

Core Design Contradiction:

Length of moving objectVSManufacturing precision

Solution Approach 1:

The common electrode lead positioned adjacent to the peripheral circuit acts as an intermediary that absorbs positioning variations. Its fixed position relative to the peripheral circuit provides a stable reference, ensuring consistent contacting area with the common electrode while enabling narrow frame width.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The common electrode lead structure is designed to self-align with the common electrode formation process. By being positioned adjacent to the peripheral circuit, it automatically establishes the correct geometric relationship, eliminating the need for additional alignment steps and ensuring consistent contacting area despite normal positioning variations.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11482592B2Substrate and manufacturing method thereof and electronic device

Publication Date: 2022.10.25 CHENGDU BOE OPTOELECTRONICS TECH CO LTD

AI summary

A substrate, a manufacturing method of a substrate and an electronic device are provided. The substrate includes a working region, a non-working region surrounding the working region, a base substrate, a peripheral circuit and a common electrode lead both in the non-working region and on the substrate; the common electrode lead is located on a side of the peripheral circuit close to the working region.