Backlight Module Light Source Fixing via Elastic Bending

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Solution Overview

Problem

Conventional backlight modules for LCD devices require multiple screws for assembly and disassembly, which is inefficient, and the thin bases of light sources can warp, reducing thermal conductivity.

Innovation Solution

The implementation of a metal back frame with protuberant strips or fixture blocks that allow light sources to be fixed without external fasteners, ensuring contact and preventing warping, thereby enhancing thermal conductivity and assembly efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple screws are used to affix light sources to the bottom plate, then the light sources can be securely fixed, but the assembly and disassembly process becomes inconvenient and inefficient

Engineering Contradiction:

Improvefixing reliabilityVSAvoidassembly convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent extracts the fastening function from separate screw components and integrates it directly into the bottom plate structure through protuberant strips that extend upward to engage with the light source base, eliminating the need for external fasteners

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The bottom plate structure itself provides the fastening function through its integrated protuberant strips, allowing the light source to be secured without requiring additional screws or fastening components

Inventive Principle:

Principle #25Self-service

2Temperature

If the base of the light source is made thin for better thermal conductivity, then heat conduction is improved, but the base becomes liable to warp and lose contact with the bottom plate

Engineering Contradiction:

Improvethermal conductivityVSAvoidbase stability

Core Design Contradiction:

TemperatureVSStability of the object's composition

Solution Approach 1:

The protuberant strips are designed to apply preliminary upward force on the light source base to counteract the warping tendency before the base can lose contact with the bottom plate, preventing the harmful effect in advance

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The elastic deformation of the protuberant strips occurs during assembly to pre-compress the light source base against the bottom plate, ensuring continuous contact and preventing warping before operation begins

Inventive Principle:

Principle #10Preliminary action

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 solution simplifies the assembly and disassembly process of light sources while maintaining effective thermal conductivity by ensuring the bases of the light sources remain in contact with the frame, reducing the need for screws and preventing warping.

Implementation Method 1

a plurality of protuberant strips corresponding to a plurality of light sources respectively, each strip having a bowed shape and an upper surface which is a bandy surface

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS7880831B2Liquid crystal display device and backlight module with light source fixing structures that are elastically bent to correspond to a bowed shape

Publication Date: 2011.02.01 INNOLUX CORP

AI summary

An exemplary backlight module (20) includes a back frame (25) including a bottom plate (251) and light sources (24) each including a base (241). The bottom plate includes fixing structures (254) that are configured for fixing the light sources to the bottom plate such that the bases of the light sources contact the bottom plate. A liquid crystal display device (2) using the backlight module is also provided.