Panel Guide Member Warp Prevention in LCD Backlight

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Solution Overview

Problem

The existing panel guide members in LCD devices warp due to heat generated by the backlight assembly, leading to light leakage and a reduction in display quality.

Innovation Solution

A panel guide member comprising multiple panel guide bodies made of synthetic resin, supported by warp preventing members made of elastic material to prevent warping caused by thermal expansion and contraction, which are connected to each other to maintain structural integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If panel guide members are manufactured using synthetic resin, then ease of manufacture is improved, but warping occurs due to heat expansion in limited space

Engineering Contradiction:

Improveease of manufactureVSAvoidwarping

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The panel guide member is divided into multiple separate guide members, each supporting a specific edge of the display panel. This segmentation allows each individual guide member to expand and contract independently due to thermal effects, preventing warping while maintaining ease of manufacture through modular synthetic resin construction

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the support structure are given different properties - the panel guide members are made of synthetic resin for ease of manufacture, while additional warp preventing members are strategically placed at critical locations to counteract thermal expansion and prevent warping in specific areas

Inventive Principle:

Principle #3Local quality

2Strength

If panel guide members are made as single integrated structure, then structural integrity is improved, but light leakage occurs due to warping

Engineering Contradiction:

Improvestructural integrityVSAvoidlight leakage

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The support structure is segmented into multiple panel guide members positioned at different edges, allowing independent thermal movement that prevents warping-induced light leakage while maintaining overall structural integrity through coordinated support

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Warp preventing members are introduced as intermediary elements between the panel guide members and the display panel. These members actively counteract thermal expansion forces, preventing the panel guide members from warping and causing light leakage, while allowing the synthetic resin material to be used

Inventive Principle:

Principle #24Intermediary (Mediator)

3Manufacturing precision

If panel guide members are positioned close to display panel edges, then support precision is improved, but warping is exacerbated by heat in limited space

Engineering Contradiction:

Improvesupport precisionVSAvoidwarping

Core Design Contradiction:

Manufacturing precisionVSStability of the object's composition

Solution Approach 1:

The support function is segmented into multiple distributed panel guide members along the edges, which can locally adapt to thermal expansion without causing warping, maintaining precise support positioning while accommodating thermal effects

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The material properties and structural configuration are changed to accommodate thermal expansion. The panel guide members are designed with specific geometric parameters and material characteristics that allow controlled expansion and contraction, preventing warping while maintaining precise support function

Inventive Principle:

Principle #35Parameter changes

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

Prevents warping of the panel guide members, thereby reducing light leakage and maintaining the display quality by mechanically connecting the panel guide bodies using elastic members, ensuring stable support around the effective display region.

Implementation Method 1

warping of the panel guide bodies caused by contraction/expansion of the panel guide bodies

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Implementation Method 2

warp preventing members connecting the panel guide bodies with each other and suppressing warping

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS7766535B2Panel guide member and display device having the same

Publication Date: 2010.08.03 LG DISPLAY CO LTD

AI summary

Provided are a panel guide member and a display device having the same. The display device includes a receiving container, a light source, a display panel, a pane guide member, and a top case. The receiving container includes a bottom plate and sidewalls protruding from edges of the bottom plate. The light source is disposed in the receiving container to generate light. The display panel faces the bottom plate and displays an image using the light. The panel guide member includes a plurality of panel guide bodies dividing and supporting an NEDR around an EDR of the display panel on which an image is displayed, and warp preventing members connecting the panel guide bodies with each other and suppressing warping of the panel guide bodies caused by contraction/expansion of the panel guide bodies. The top case includes a first cover, and a second cover to couple to the sidewalls.