Foaming Material Frame Light Leakage Prevention

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Solution Overview

Problem

The development of thin and lightweight flat displays faces challenges in maintaining display quality due to light leakage issues when conventional metal and plastic frames are replaced with foaming material frames, which lack light shielding structures.

Innovation Solution

A foaming material frame with a base plate and sidewall, featuring a loading portion and a suppressing portion with a reflectance difference, where the suppressing portion is thinner and has a lower reflectance than the loading portion, forming an air layer with the light guide plate to reduce light leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If conventional metal holder and plastic frame are replaced with foaming material frame, then weight and frame width are reduced, but light shielding performance deteriorates causing light leakage

Engineering Contradiction:

Improveframe weightVSAvoidlight leakage

Core Design Contradiction:

Weight of moving objectVSObject-affected harmful factors

Solution Approach 1:

The frame is divided into two regions with different thicknesses: a loading portion with greater thickness for structural support and a suppressing portion with smaller thickness for light shielding. This local differentiation allows the frame to simultaneously achieve light weight and effective light leakage prevention.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The thickness parameter of the frame is varied across different regions. The suppressing portion has a smaller thickness (0.1-0.5mm) compared to the loading portion, creating a height difference of at least 0.2mm. This parameter change optimizes both weight reduction and light shielding performance.

Inventive Principle:

Principle #35Parameter changes

2Length of moving object

If the frame thickness is reduced to achieve lightness and narrow width, then weight and frame width are improved, but light shielding capability worsens

Engineering Contradiction:

Improveframe widthVSAvoidlight leakage

Core Design Contradiction:

Length of moving objectVSObject-affected harmful factors

Solution Approach 1:

Different regions of the frame have different thickness characteristics. The suppressing portion adjacent to the light guide plate has reduced thickness for light shielding, while the loading portion maintains greater thickness for structural integrity, resolving the contradiction between narrow frame width and light shielding capability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

An air layer is formed between the light guide plate and the suppressing portion, acting as an intermediary light-blocking medium. This air layer enhances the light shielding effect without requiring increased frame thickness, thus maintaining the narrow frame width while preventing light leakage.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If the suppressing portion thickness is reduced to lower reflectance, then light leakage is reduced, but structural strength may worsen

Engineering Contradiction:

Improvelight leakageVSAvoidframe strength

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The frame structure assigns different functional requirements to different regions: the suppressing portion is optimized for light shielding with reduced thickness and lower reflectance, while the loading portion maintains greater thickness for structural strength. This local quality differentiation allows the overall frame to maintain sufficient strength while achieving effective light leakage prevention.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The loading portion and suppressing portion are merged into a single integrated frame structure made of foaming material. This combination allows the frame to simultaneously provide structural support through the loading portion and light shielding through the suppressing portion, maintaining overall strength while preventing light leakage.

Inventive Principle:

Principle #5Merging (Combining)

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 solution effectively addresses light leakage and maintains display quality by using a foaming material frame that is lighter and narrower, while ensuring the reflectance of the suppressing portion is lower than the loading portion, thus enhancing the overall display structure's performance.

Implementation Method 1

A reflectance of the suppressing portion is smaller than a reflectance of the loading portion

Methodology Applied

Scientific EffectReflectance difference: Reflection

Implementation Method 2

An air layer is formed between the light guide plate and the suppressing portion

Methodology Applied

Scientific EffectAir layer formation: Air Lubrication

Data Source

PatentUS8794814B2Foaming material frame and display structure using the same

Publication Date: 2014.08.05 AU OPTRONICS CORP

AI summary

A foaming material frame is provided and can be utilized in a display structure. The foaming material frame includes a base plate and a sidewall. The base plate includes a loading portion and a suppressing portion connected to at least one side of the loading portion. A reflectance of the suppressing portion is smaller than a reflectance of the loading portion. An area of the loading portion is equal to or greater than a display zone of the display structure. The sidewall stands upright around the base plate. A display structure using the foaming material frame is also provided.