Flat Panel Display Mold Frame Coupling Structure

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Solution Overview

Problem

Conventional liquid crystal displays (LCDs) face increased material and manufacturing costs due to the need for a mold frame with extended sidewalls to cover the bottom chassis, which limits the contact area and worsens electromagnetic interference (EMI).

Innovation Solution

A coupling structure is introduced where the mold frame lacks a sidewall extension, featuring protrusions and coupling members on the mold frame and bottom chassis that securely connect without covering the sidewalls, allowing for improved EMI reduction and reduced material costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the mold frame sidewall is extended to cover the bottom chassis sidewall, then the structural support is improved, but the material cost increases and the contact area between top and bottom chassis is reduced

Engineering Contradiction:

Improvestructural supportVSAvoidmaterial cost

Core Design Contradiction:

StrengthVSQuantity of substance

Solution Approach 1:

The mold frame is segmented into a main body portion and a separate coupling structure. The coupling structure includes coupling members that protrude from the rear side of the base plate, which can be coupled with corresponding coupling members on the bottom chassis. This segmentation allows the mold frame to provide structural support without requiring extended sidewalls, thereby reducing material cost while maintaining coupling capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of extending the mold frame sidewalls in the horizontal direction to cover the bottom chassis, the patent transitions to a vertical coupling approach using coupling members that protrude from the rear side of the base plate. This dimensional change allows coupling to occur in the depth direction rather than requiring horizontal coverage, reducing material requirements while maintaining structural integrity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Strength

If the mold frame sidewall covers the bottom chassis sidewall, then the structural coverage is improved, but the contact area between top and bottom chassis is reduced, worsening electromagnetic interference

Engineering Contradiction:

Improvestructural coverageVSAvoidelectromagnetic interference

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The coupling function is segmented from the sidewall coverage function. The mold frame uses coupling members protruding from the rear side of the base plate to provide structural coupling, while the sidewalls remain uncextended, exposing the bottom chassis sidewalls to maximize contact area with the top chassis for EMI reduction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of using sidewall extension to achieve coupling and coverage, the patent inverts the approach by using coupling members that protrude from the rear side of the base plate. This inversion allows the sidewalls to remain short and exposed, maximizing the contact area between top and bottom chassis for electromagnetic interference reduction.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS7940287B2Flat panel display and a method thereof

Publication Date: 2011.05.10 SAMSUNG DISPLAY CO LTD

AI summary

A flat panel display including a first mold frame and a bottom chassis. The first mold frame includes a first base plate with an inside region opened and a plurality of first coupling members protruding from a rear side of the first base plate. The bottom chassis includes a second base plate, a plurality of sidewalls extending from the second base plate and a plurality of second coupling members formed on the plurality of sidewalls and coupled with the plurality of first coupling members.