Backlight Module Open Frame with Insulating Reflector Sheet

Solution Overview

Problem

Conventional backlight modules for LCDs are hindered by increased overall size due to the thickness of the plastic frame, which impedes miniaturization and results in higher material costs.

Innovation Solution

A backlight module design featuring an open frame with free-ends and a reflector sheet that eliminates part of the frame, reducing size and material usage while maintaining essential functions like insulation, using a reflector sheet to extend between the liquid crystal display panel and the front frame to prevent short circuits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional plastic frame is used to surround the light source module for fixing and insulation, then the structural stability and insulation are improved, but the overall size and material cost increase

Engineering Contradiction:

Improveinsulation and structural stabilityVSAvoidoverall size of backlight module

Core Design Contradiction:

ReliabilityVSVolume of stationary object

Solution Approach 1:

The patent removes a portion of the plastic frame (specifically one side of the frame) to reduce overall size and material usage. The reflector sheet is then utilized to provide insulation and support functions in the area where the frame was removed, thereby achieving miniaturization while maintaining essential functional performance.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The reflector sheet is designed to serve multiple functions: it reflects light from the light source module, provides insulation where the frame was removed, and offers structural support. This multi-functionality allows the frame to be reduced in size while maintaining the necessary insulation and stability functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If a conventional plastic frame is used to surround the light source module, then the insulation and structural support are improved, but the material cost increases

Engineering Contradiction:

Improveinsulation and structural supportVSAvoidmaterial cost

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent removes a portion of the plastic frame (specifically one side of the frame) to reduce overall size and material usage. The reflector sheet is then utilized to provide insulation and support functions in the area where the frame was removed, thereby achieving miniaturization while maintaining essential functional performance.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The reflector sheet is designed to serve multiple functions: it reflects light from the light source module, provides insulation where the frame was removed, and offers structural support. This multi-functionality allows the frame to be reduced in size while maintaining the necessary insulation and stability functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Volume of stationary object

If the plastic frame thickness is reduced to achieve miniaturization, then the overall size is reduced, but the insulation performance and short circuit prevention deteriorate

Engineering Contradiction:

Improveoverall size of backlight moduleVSAvoidinsulation performance

Core Design Contradiction:

Volume of stationary objectVSReliability

Solution Approach 1:

The reflector sheet is designed to serve multiple functions: it reflects light from the light source module, provides insulation where the frame was removed, and offers structural support. This multi-functionality allows the frame to be reduced in size while maintaining the necessary insulation and stability functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The reflector sheet acts as an intermediary component that compensates for the reduced frame thickness. By positioning the reflector sheet to extend into the space where the frame previously provided insulation, it mediates the insulation function that would otherwise be compromised by the reduced frame dimensions.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 the overall size of the backlight module and panel display device, saving material costs while ensuring insulation and preventing short circuits, thus enhancing the miniaturization and cost-effectiveness of the display device.

Implementation Method 1

The reflector sheet 50 is disposed at the bottom of the light source module 10 for reflecting the light leaking out from the bottom of the light source module 10

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUS8446546B2Backlight module with bent reflector sheet and display panel device

Publication Date: 2013.05.21 AU OPTRONICS CORP

AI summary

A backlight module and a display panel device using the same are provided. The backlight module includes a light source module, an open frame, and a reflector sheet. The open frame is disposed around the light source module and has a first free-end and a second free-end. A space interval exists between the first and second free-ends. The reflector sheet is disposed on a rear side of the light source module and has a body and a sidewall. The sidewall corresponds to the space interval between the first and second free-ends and extends over the light source module. The display panel further includes a liquid crystal display panel (LCD panel) on the light source module and a front frame which is disposed on the LCD panel enclosing a lateral side of the LCD panel. The sidewall of the reflector sheet extends between the lateral side of the LCD panel and the front frame to provide insulation.