Backlight Module Bearing Plate with Protruding Stages for Alignment

Solution Overview

Problem

Conventional backlight modules face issues with skewing and improper assembly due to assembly tolerance and uneven substrate surfaces, as well as inadequate heat dissipation, particularly in grooved areas.

Innovation Solution

The design incorporates a bearing plate with a trough, grooves, and protruding stages to stabilize the light module, enhance glue distribution, and integrate a cooling fin for improved heat dissipation, ensuring proper alignment and efficient heat transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If grooves are added to the substrate for structural reinforcing, then structural strength is improved, but the substrate surface becomes uneven causing lamp strip skewing and assembly difficulty

Engineering Contradiction:

Improvestructural strengthVSAvoidlamp strip alignment precision

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The patent applies local quality by creating different surface levels (stages) at different locations on the substrate. The first inner stage is positioned between the trough and first groove, while the first outer stage is positioned at the first groove, providing localized compensation for surface unevenness caused by grooves to ensure proper lamp strip alignment.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements preliminary action by pre-forming the multi-level surface structure (trough, grooves, inner stage, outer stage) on the substrate before assembling the lamp strips. This preliminary surface preparation compensates for potential alignment issues before the actual assembly process, ensuring proper lamp strip positioning.

Inventive Principle:

Principle #10Preliminary action

2Temperature

If the substrate surface is made uneven for heat dissipation grooves, then heat dissipation capability is improved, but assembly stability of lamp strips deteriorates

Engineering Contradiction:

Improveheat dissipation capabilityVSAvoidassembly stability

Core Design Contradiction:

TemperatureVSStability of the object's composition

Solution Approach 1:

The patent applies local quality by creating different surface levels (stages) at different locations on the substrate. The first inner stage is positioned between the trough and first groove, while the first outer stage is positioned at the first groove, providing localized compensation for surface unevenness caused by grooves to ensure proper lamp strip alignment.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements preliminary action by pre-forming the multi-level surface structure (trough, grooves, inner stage, outer stage) on the substrate before assembling the lamp strips. This preliminary surface preparation compensates for potential alignment issues before the actual assembly process, ensuring proper lamp strip positioning.

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If assembly tolerance is not controlled, then manufacturing complexity is reduced, but lamp strip skewing increases affecting optical effect

Engineering Contradiction:

Improveassembly process complexityVSAvoidlamp strip alignment precision

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent applies local quality by creating different surface levels (stages) at different locations on the substrate. The first inner stage is positioned between the trough and first groove, while the first outer stage is positioned at the first groove, providing localized compensation for surface unevenness caused by grooves to ensure proper lamp strip alignment.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements preliminary action by pre-forming the multi-level surface structure (trough, grooves, inner stage, outer stage) on the substrate before assembling the lamp strips. This preliminary surface preparation compensates for potential alignment issues before the actual assembly process, ensuring proper lamp strip positioning.

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 design reduces skewing and improves assembly stability while effectively dissipating heat, addressing the challenges of uneven surfaces and heat management in backlight modules.

Implementation Method 1

The first portion is connected to the bottom face of the light module, and the second portion is connected to the inner face of the groove. In such design, after being absorbed by the first portion from the light module, heat may be transferred to the bearing plate through the third portion and the second portion, thereby achieving a heat dissipation effect.

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS10698261B1Backlight module

Publication Date: 2020.06.30 AU OPTRONICS CORP

AI summary

A backlight module having a bearing plate and a light module is provided. The bearing plate has a bearing surface, which includes a trough, a first groove, a first inner stage, and a first outer stage. The first groove is disposed close to the trough. The first inner stage is between the trough and the first groove while the first outer stage is on the side of the first groove opposite to the first inner stage. The light module is disposed on the bearing surface and corresponds to the trough. Comparing to the first inner stage, the first outer stage is more protruding toward the light module.