Backlight Chassis-Frame Hot Melt Fixing for Vibration Noise

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Solution Overview

Problem

Existing liquid crystal display devices face issues with increased component count and assembly complexity due to the use of dedicated elastic components to suppress abnormal noise during vibration, which can be exacerbated by assembly tolerance variations.

Innovation Solution

A lighting device and display device configuration utilizing a chassis and frame structure with a hot melt resin fixing portion to secure the chassis and frame, eliminating the need for dedicated components to fill gaps caused by assembly tolerance, thereby suppressing abnormal noise during vibration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a dedicated elastic component is used to suppress abnormal noise, then the noise suppression effect is improved, but the number of components increases

Engineering Contradiction:

Improveabnormal noiseVSAvoidnumber of components

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent merges the noise suppression function into the existing adhesive material used for assembly, eliminating the need for a separate elastic component. The adhesive material is formulated to provide both bonding and noise suppression functions simultaneously, thereby reducing component count while maintaining noise suppression effectiveness.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The adhesive material is designed to perform multiple functions: structural bonding between components and elastic noise suppression during vibration. This multi-functional material approach allows a single substance to replace what would traditionally require separate dedicated components for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Object-affected harmful factors

If a dedicated elastic component is used to suppress abnormal noise, then the noise suppression effect is improved, but the number of assembling steps increases

Engineering Contradiction:

Improveabnormal noiseVSAvoidnumber of assembling steps

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The noise suppression function is combined with the adhesive application step, so that the same material and process used for bonding also provides noise suppression. This eliminates the need for separate assembly steps to install dedicated elastic components, thereby reducing total assembly steps and improving productivity.

Inventive Principle:

Principle #5Merging (Combining)

3Object-affected harmful factors

If a dedicated elastic component is used to suppress abnormal noise, then the noise suppression effect is improved, but the manufacturing cost increases

Engineering Contradiction:

Improveabnormal noiseVSAvoidmanufacturing cost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent combines noise suppression functionality with the standard adhesive material already required for assembly, eliminating the need to purchase and apply separate elastic components. This integration reduces material costs and simplifies the manufacturing process, thereby reducing overall manufacturing cost while maintaining noise suppression effectiveness.

Inventive Principle:

Principle #5Merging (Combining)

4Device complexity

If the gap between parts is not filled, then the assembly is simpler, but abnormal noise occurs during vibration

Engineering Contradiction:

Improveassembly simplicityVSAvoidabnormal noise

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The adhesive material is formulated to serve dual purposes: filling gaps between parts to prevent vibration-induced noise while simultaneously providing the bonding function required for assembly. This eliminates the need for separate gap-filling materials or steps, maintaining assembly simplicity while preventing abnormal noise.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 reduces the number of components and assembly steps while maintaining cost-effectiveness by using a hot melt resin to fill and fix gaps, thus minimizing noise and manufacturing costs.

Implementation Method 1

the fixing portion is formed of a hot melt resin

Methodology Applied

Scientific EffectHot melt resin:

Data Source

PatentUS20260009944A1Lighting device, display device, method of manufacturing lighting device, and method of manufacturing display device

Publication Date: 2026.01.08 SHARP DISPLAY TECHNOLOGY CORP

AI summary

A chassis includes a bottom plate portion and a chassis side wall portion. A frame includes a main body frame portion and a frame side wall portion, and the frame side wall portion is disposed outside the chassis side wall portion to cover the chassis from the front side in a state where the main body frame portion overlaps at least part of the optical component. A backlight device further includes a fixing portion that is formed at least in part or the whole of a gap between the chassis side wall portion and the frame side wall portion and fixes the chassis and the frame, and the fixing portion is formed of a hot melt resin.