Backlight Module Fixing Frame Design for Narrow Border and Heat Dissipation

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Solution Overview

Problem

Conventional backlight modules face challenges in achieving a narrow border design while maintaining effective heat dissipation, as the sheet metal covering the heat dissipating seat obstructs the heat dissipation and requires a stud for fixing, which is not conducive to a slim border.

Innovation Solution

A backlight module design featuring a carrying member with a light source and light guide plate, a non-coplanar fixing frame that creates an accommodating space to house the assembling structure, allowing for the fixation of outer components without completely covering the carrying member, thereby reducing border width and enhancing heat dissipation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a stud structure is used to fix the pressing plate, plastic frame, and exterior front frame to the backlight module, then the fixing is achieved, but the border width increases and cannot meet narrow border requirements

Engineering Contradiction:

Improvefixing capabilityVSAvoidborder width

Core Design Contradiction:

Ease of manufactureVSLength of stationary object

Solution Approach 1:

The patent extracts the fixing function from the traditional stud structure that protrudes outward, and integrates it into the backlight module body through embedded fixing ears that extend inward. This removes the need for external fixing protrusions, thereby reducing border width while maintaining fixing capability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The fixing ears extend in the thickness direction of the backlight module rather than in the lateral direction. This dimensional change allows the fixing structure to be accommodated within the module's depth, eliminating the need for lateral protrusions that increase border width.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Strength

If sheet metal covers the entire heat dissipating seat, then structural integrity is maintained, but heat dissipation effect deteriorates

Engineering Contradiction:

Improvestructural integrityVSAvoidheat dissipation effect

Core Design Contradiction:

StrengthVSTemperature

Solution Approach 1:

The sheet metal cover is designed with local openings at positions corresponding to heat generating components. This creates different local qualities: areas with openings for heat dissipation and areas without openings for structural support, thereby simultaneously achieving both structural integrity and effective heat dissipation.

Inventive Principle:

Principle #3Local quality

3Device complexity

If the fixing frame is coplanar with the carrying member, then the structure is simple, but the assembling structure cannot be accommodated and outer component fixation is compromised

Engineering Contradiction:

Improvestructure simplicityVSAvoidouter component fixation

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The fixing frame is designed to be non-coplanar with the carrying member, extending in the thickness direction to form a three-dimensional accommodating space. This dimensional extension provides room for the assembling structure while maintaining relative simplicity of the overall design.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The non-coplanar fixing frame creates an accommodating space that nests the assembling structure within the backlight module assembly. This nested arrangement allows multiple components to be integrated in a compact manner, improving fixation reliability without excessive complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

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

The design achieves a narrower border width and improved heat dissipation by exposing the carrying member, allowing for efficient heat transfer and accommodating various outer components, while maintaining structural strength.

Implementation Method 1

The light guide plate is disposed on the carrying member, in which a light-incident surface of the light guide plate is disposed adjacent to the light source

Methodology Applied

Scientific EffectLight propagation: Light

Implementation Method 2

The backlight module includes a carrying member, a light source, a light guide plate, a fixing frame and an outer component... improved heat dissipation by exposing the carrying member, allowing for efficient heat transfer

Methodology Applied

Scientific EffectHeat conduction: Conduction (thermal)

Data Source

PatentUS11156864B2Backlight module including a fixing frame and display device comprising the same

Publication Date: 2021.10.26 RADIANT GUANGZHOU OPTO ELECTRONICS

AI summary

A backlight module includes a carrying member, a light source, a light guide plate, a fixing frame and an outer component. The light source is disposed on the carrying member. The light guide plate is disposed on the carrying member, in which a light-incident surface of the light guide plate is disposed adjacent to the light source. The fixing frame fixed on a bottom portion of the carrying member along a first direction. The outer component is fixed on the fixing frame along a second direction.