Display Backlight Heat Dissipation Member Segmentation

Solution Overview

Problem

The existing display apparatuses with edge-type backlight units face distortion issues due to physical deformation of the heat sink plate, leading to reduced reliability and uniformity of light emission, as the heat dissipation member expands and distorts, affecting the luminance and image quality.

Innovation Solution

Incorporating a dual heat dissipation member system where a first heat dissipation member contacts the light source module and a second member is spaced apart in a perpendicular direction, preventing expansion-induced distortion by allowing heat to be dissipated without physical deformation, thus maintaining the structural integrity and light uniformity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If a single heat dissipation member is used to dissipate heat from the light source module, then heat dissipation efficiency is improved, but physical deformation and distortion occur due to thermal expansion

Engineering Contradiction:

Core Design Contradiction:

Loss of energyVSStability of the object's composition

Solution Approach 1:

The heat dissipation member is divided into a first heat dissipation member and a second heat dissipation member separated by a gap. The first member contacts the light source module for direct heat dissipation, while the second member provides structural support and maintains spacing. This segmentation allows the heat dissipation function to be distributed, preventing excessive thermal expansion of a single component while maintaining overall structural stability.

Inventive Principle:

Principle #1Segmentation

2Loss of energy

If the heat dissipation member is positioned close to the light source module for efficient heat dissipation, then heat dissipation performance is improved, but distortion occurs due to thermal expansion

Engineering Contradiction:

Core Design Contradiction:

Loss of energyVSManufacturing precision

Solution Approach 1:

The heat dissipation system is segmented into two parts: the first heat dissipation member positioned close to the light source module for efficient heat absorption, and the second heat dissipation member positioned at a distance to provide structural reference. The gap between them prevents distortion while maintaining effective heat dissipation path.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The gap between the first and second heat dissipation members acts as an intermediary element that prevents direct mechanical coupling. This intermediary space allows the first member to expand thermally without transmitting distortion forces to the light source module, thereby maintaining light emission uniformity while preserving heat dissipation efficiency.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Temperature

If a heat dissipation member is used to dissipate heat from the light source, then heat dissipation is improved, but the member undergoes physical deformation due to temperature increase

Engineering Contradiction:

Core Design Contradiction:

TemperatureVSShape

Solution Approach 1:

The heat dissipation function is segmented between two members: the first member directly contacts the light source to absorb heat, while the second member maintains structural integrity and spacing. This segmentation distributes the thermal load and prevents excessive deformation of any single member.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system utilizes controlled thermal expansion parameters by designing the gap between the two heat dissipation members to accommodate expansion. The first member can expand thermally within the constraints of the gap, while the second member provides a stable reference that prevents uncontrolled deformation and maintains overall shape stability.

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

This configuration effectively prevents distortion of the heat dissipation member, ensuring consistent light emission and improved reliability of the display apparatus by allowing for efficient heat dissipation without compromising the structural stability.

Implementation Method 1

a heat dissipation member coupled to the rear chassis and configured to dissipate heat generated by the light source module

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

the heat sink plate may undergo physical deformation due to an increase in temperature when the light source generates heat

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentUS12130466B2Display apparatus

Publication Date: 2024.10.29

AI summary

A display apparatus includes: a liquid crystal panel configured to display an image; a light guide plate provided behind the liquid crystal panel in a first direction; a light source module adjacent to a side surface of the light guide plate, the light source module including a plurality of light sources arranged in a second direction perpendicular to the first direction and configured to emit light toward the side surface of the light guide plate; a rear chassis provided behind the light guide plate in the first direction; and a heat dissipation member coupled to the rear chassis and configured to dissipate heat generated by the light source module, wherein the heat dissipation member may include: a first heat dissipation member contacting the light source module; and a second heat dissipation member spaced apart from the first heat dissipation member by a gap in a third direction perpendicular to the first direction and the second direction.