Bulging Glass Panel for Display Screen Light Leakage

Solution Overview

Problem

Large-size display screens suffer from light leakage at the corners due to inward contraction of the glass panel caused by internal stress, which conventional methods, such as increasing liquid crystal content, fail to effectively address.

Innovation Solution

The glass panel is designed with sides that bulge outward from the midpoint to the ends, featuring cutting marks to facilitate a gradually bulging shape that matches the contraction amount, ensuring a normal rectangular shape when assembled, allowing for uniform contact with the bezel and reducing light leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of moving object

If the glass panel size is increased for large-size display screens, then the display area is improved, but the inward contraction due to internal stress increases, causing corner light leakage

Engineering Contradiction:

Improvedisplay areaVSAvoidshape precision

Core Design Contradiction:

Area of moving objectVSManufacturing precision

Solution Approach 1:

The glass panel is pre-formed with a bulging shape before assembly, anticipating the inward contraction that will occur after cutting. This preliminary shaping compensates for the future deformation, ensuring the panel returns to the correct rectangular shape after stress relaxation and cutting.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent applies a counter-shape (bulging outward) to oppose the harmful effect of internal stress contraction. By pre-forming the panel with outward bulging, the subsequent inward contraction during assembly and use is compensated, eliminating the shape distortion and light leakage problem.

Inventive Principle:

Principle #9Preliminary anti-action

2Ease of manufacture

If the glass panel is made with standard flat shape, then the manufacturing is simple, but the corner light leakage occurs due to gravitational deformation during vertical placement

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoiddisplay quality

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The glass panel is pre-formed with a bulging shape before assembly, anticipating the inward contraction that will occur after cutting. This preliminary shaping compensates for the future deformation, ensuring the panel returns to the correct rectangular shape after stress relaxation and cutting.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent applies a counter-shape (bulging outward) to oppose the harmful effect of internal stress contraction. By pre-forming the panel with outward bulging, the subsequent inward contraction during assembly and use is compensated, eliminating the shape distortion and light leakage problem.

Inventive Principle:

Principle #9Preliminary anti-action

3Reliability

If conventional methods like increasing liquid crystal content are used to reduce stress influence, then the light leakage is not effectively addressed, but the range of liquid crystal amount is severely restricted and gravitational display nonuniformity is introduced

Engineering Contradiction:

Improvelight leakage preventionVSAvoidliquid crystal amount range

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent extracts the stress compensation function from the liquid crystal layer and transfers it to the glass panel structure itself. By shaping the glass panel to bulge outward, the compensation for internal stress is achieved in the glass structure, eliminating the need to adjust liquid crystal content and avoiding the associated limitations.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The glass panel shape acts as an intermediary mechanism to compensate for stress effects. Instead of modifying the liquid crystal properties or amount, the patent uses the glass panel's geometric configuration as a mediator to counteract the harmful stress contraction, achieving stress compensation without affecting liquid crystal performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This design effectively cancels out the inward contraction caused by internal stress, preventing light leakage and maintaining a uniform rectangular shape, thus enhancing the display quality by ensuring multi-point contact with the bezel.

Implementation Method 1

each side bulges outwards gradually with respect to a connection line of 2 opposing ends of the side, with a vertical distance from a point on the side between an end of the side and a midpoint of the side to the connection line of the opposing ends of the side increasing gradually in a direction from the end to the midpoint

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS11275262B2Glass panel for display screen, method of preparing the same, display screen and the method of preparing the same

Publication Date: 2022.03.15 BOE TECHNOLOGY GROUP CO LTD

AI summary

The present disclosure provides a glass panel of a display screen, of which each side bulges outwards gradually with respect to a connection line of opposing ends of the side, with a vertical distance from a point on the side between an end and a midpoint of the side to the connection line of the opposing ends of the side increasing gradually in a direction from the end to the midpoint.