Backlight Fixing Protrusion and Hole Coupling for Display Chassis

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Solution Overview

Problem

Liquid crystal display apparatuses face the challenge of foreign material introduction, such as dust, due to the mounting of the backlight, which complicates the manufacturing process and increases costs with the use of tape for sealing.

Innovation Solution

The implementation of a fixing protrusion and hole coupling mechanism on the bottom chassis, where the backlight is securely attached without the need for a passing hole, simplifying the manufacturing process and eliminating the need for additional sealing materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a passing hole is used to mount the backlight to the bottom chassis, then the backlight can be securely attached, but foreign material such as dust can be introduced to the inside of the housing

Engineering Contradiction:

Improvebacklight mounting securityVSAvoidforeign material introduction

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The passing hole is divided into two separate features: a fixing hole for mounting the backlight and a separate through-hole for cable passage. This segmentation allows the backlight to be securely mounted while preventing foreign material from entering through the fixing hole, as it is no longer open to the exterior.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cable passage function is extracted from the backlight mounting hole. Instead of using a single passing hole for both purposes, the cable can now pass through a separate opening in the bottom chassis, leaving the fixing hole sealed and dedicated solely to backlight mounting.

Inventive Principle:

Principle #2Taking out (Extraction)

2Object-affected harmful factors

If tape is applied to prevent foreign material entry, then sealing is improved, but manufacturing cost increases and process complexity increases

Engineering Contradiction:

Improveforeign material preventionVSAvoidmanufacturing process complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The bottom chassis structure itself provides the sealing function through its integrated fixing hole design. The chassis is formed with a recess that receives the backlight, and the fixing hole is sealed by the chassis structure rather than requiring external sealing materials like tape. This self-service approach eliminates additional manufacturing steps.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The mounting and sealing functions are merged into a single integrated structure. The fixing hole in the bottom chassis simultaneously serves to secure the backlight and prevent foreign material entry, eliminating the need for separate sealing operations.

Inventive Principle:

Principle #5Merging (Combining)

3Object-affected harmful factors

If tape is applied to seal the hole, then foreign material entry is prevented, but manufacturing cost increases

Engineering Contradiction:

Improveforeign material preventionVSAvoidmanufacturing cost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #25Self-service

4Ease of manufacture

If a passing hole is used for backlight mounting, then installation is simplified, but foreign material can be introduced and sealing materials are required

Engineering Contradiction:

Improvebacklight mounting simplicityVSAvoidforeign material introduction

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP3051335B1Display apparatus

Publication Date: 2021.06.30 SAMSUNG ELECTRONICS CO LTD

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AI summary

A display apparatus is provided. The display apparatus includes a display panel (11), a substrate (100), and a bottom chassis (15). The substrate is provided with light sources (110) to emit light towards the display panel. The substrate includes a fixing hole (120) formed between the light sources. The substrate is coupled to the bottom chassis. The bottom chassis includes a fixing protrusion (130) to be coupled to the fixing hole. The fixing protrusion is formed with the bottom chassis to have a detachment prevention structure (140) so that the fixing protrusion is prevented from being detached from the fixing hole.