LCD Light Leakage Prevention via Short-Circuit Spacer

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Solution Overview

Problem

Liquid crystal displays (LCDs) face issues with light leakage due to damage to the light blocking layer when the common electrode is cut, which can occur from static electricity introduction, leading to potential damage and display malfunction.

Innovation Solution

The design includes a short-circuit spacer that contacts the second electrode and the light blocking layer, allowing for a cut line in the second electrode to prevent static electricity introduction while maintaining the integrity of the light blocking layer, thereby preventing light leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the common electrode is cut to prevent static electricity introduction, then static electricity protection is improved, but the light blocking layer may be damaged causing light leakage

Engineering Contradiction:

Improvestatic electricity protectionVSAvoidlight blocking layer integrity

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The common electrode is divided into multiple separate electrode regions by introducing cut lines, which isolates static electricity pathways while maintaining electrode functionality in each segment

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A spacer structure is introduced as an intermediary element between the common electrode and the light blocking layer. The spacer provides mechanical support during the cutting process and prevents direct contact that would cause light blocking layer damage, thereby mediating between the need for electrode cutting and light blocking layer protection

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the common electrode is cut to prevent static electricity introduction, then static electricity protection is improved, but display quality deteriorates due to light leakage

Engineering Contradiction:

Improvestatic electricity protectionVSAvoiddisplay quality

Core Design Contradiction:

Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The common electrode is segmented into separate regions through cut lines, which prevents static electricity propagation while maintaining proper electrode function and avoiding light leakage that would affect display quality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The spacer acts as a protective intermediary during the electrode cutting process, preventing mechanical damage to the light blocking layer that would otherwise cause light leakage and compromise display quality

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11281057B2Liquid crystal display which prevents light leakage

Publication Date: 2022.03.22 SAMSUNG DISPLAY CO LTD

AI summary

A liquid crystal display according to an exemplary embodiment of the present inventive concept includes: a first substrate including a first electrode; a second substrate including a second electrode and a light blocking layer; and a short-circuit spacer that is disposed between the first substrate and the second substrate, wherein the second electrode is disposed between the second substrate and the light blocking layer, the light blocking layer includes an opening, and the second electrode and the short-circuit spacer contact each other in the opening.