LCD Mold Frame Bezel Impact Distribution

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Solution Overview

Problem

Conventional notebook computer designs with increasing FPC width and thinner glass substrates lead to stress concentration and a higher likelihood of glass substrate breakage during shock tests, particularly at the corners, due to reduced contact area between the glass substrate and stoppers.

Innovation Solution

The design omits stoppers from both ends of the mold frame and incorporates a bezel with openings at the corresponding ends to prevent direct impact on the liquid crystal panel, distributing the impact and reducing stress concentration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the width of FPC is increased to match higher panel resolution, then the resolution is improved, but the contact area between glass substrate and stoppers is reduced, causing stress concentration and increasing the likelihood of glass substrate breakage

Engineering Contradiction:

Improvepanel resolutionVSAvoidglass substrate integrity

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent removes stoppers from both ends of the mold frame, extracting the harmful element that causes stress concentration and glass substrate breakage. This eliminates the problem of reduced contact area while maintaining the necessary support structure through alternative means (bezel with openings).

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a bezel with openings at both ends as an intermediary structure between the mold frame and the glass substrate. This bezel distributes the impact force across a larger area and prevents direct transmission of shock to the glass substrate corners, thereby reducing stress concentration while maintaining structural support.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If anti-slip tape is used to improve glass substrate strength, then the likelihood of breakage is reduced, but the assembly difficulty and fabrication cost increase

Engineering Contradiction:

Improveglass substrate strengthVSAvoidassembly difficulty and fabrication cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent eliminates the need for anti-slip tape by removing the stoppers that cause stress concentration in the first place. This extracts the root cause of the problem rather than applying a compensatory measure, thereby reducing assembly complexity and fabrication cost while maintaining glass substrate strength.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS8098346B2Mold frame and bezel and liquid crystal display containing the same

Publication Date: 2012.01.17 AU OPTRONICS CORP

AI summary

A mold frame and a bezel are disclosed. The mold frame includes a bottom portion having a first side, wherein the first side has a first end and a second end opposite to the first end, and there is only one stopper set disposed on the first side. The stopper set is composed of a plurality of stoppers sequentially arranged from the first end to the second end, wherein the first stopper of the stopper set is spaced a first distance apart from the first end; and/or the last stopper of the stopper set is spaced a second distance apart from the second end. The bezel is used for accommodating the aforementioned mold frame, and includes a first side structure having a first opening; and/or a second side structure having a second opening. A liquid crystal display is also disclosed, and includes the mold frame and bezel.