Backlight Adhesive Injection for Vibration Noise Reduction

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Solution Overview

Problem

Existing display apparatus backlights face issues with internal components like optical sheets and light guide plates moving during vibration, causing noise and potential damage due to contact with external frames, and the use of multiple double-sided adhesive tapes increases costs and manufacturing complexity.

Innovation Solution

A configuration where a light guide plate and optical member are fixed using an adhesive agent placed in strategically aligned holes and cutouts within the frame, reducing the need for multiple tapes and minimizing movement between internal and external components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple double-sided adhesive tapes are used to fix optical sheets and light guide plate, then movement of internal members is restricted, but manufacturing cost and manufacturing complexity increase

Engineering Contradiction:

Improvefixing reliabilityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent extracts the adhesive function from multiple distributed adhesive tapes and concentrates it into a single adhesive agent injected through one hole. This eliminates the need for multiple tapes while maintaining fixing reliability, thereby reducing material costs and simplifying the manufacturing process.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The single adhesive agent performs the function of multiple adhesive tapes simultaneously. By injecting one adhesive agent through a single hole in the frame, it adheres to multiple internal members (optical sheets and light guide plate) at once, achieving universal fixing across all components with a single operation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple double-sided adhesive tapes are used to fix optical sheets and light guide plate, then movement of internal members is restricted, but manufacturing complexity increases

Engineering Contradiction:

Improvefixing reliabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent merges multiple separate adhesive tape applications into a single adhesive injection operation. The adhesive agent is injected through one hole in the frame and simultaneously bonds multiple internal members, combining what would have been multiple separate manufacturing steps into one operation.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of manufacture

If internal members are not fixed, then manufacturing cost is reduced, but movement during vibration causes noise and damage

Engineering Contradiction:

Improvemanufacturing costVSAvoidvibration-induced noise and damage

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The adhesive agent acts as an intermediary substance that bonds the internal members (optical sheets and light guide plate) to the frame. This intermediary material transfers and distributes vibrational forces, preventing direct contact and impact between components that would cause noise and damage, while still allowing the structure to remain flexible.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The adhesive agent provides beforehand cushioning by creating a bonded connection between internal members and the frame before vibration occurs. This pre-established bonding prevents movement and potential damage during vibration, acting as a protective measure against future harmful effects.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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

This solution effectively restricts movement between internal and external components of the backlight, reducing noise and potential damage during vibration while lowering costs by minimizing tape usage, and securely fixing components without the need for extensive tape application.

Implementation Method 1

The adhesive agent is disposed in the first hole of the frame and in a space which communicates with the first hole and includes the cutout or the hole of each of the light guide plate and the optical member. The adhesive agent is configured to fix the light guide plate and the optical member.

Methodology Applied

Scientific EffectAdhesive: Adhesive

Data Source

PatentUS11287681B2Backlight and display apparatus

Publication Date: 2022.03.29 TRIVALE TECHNOLOGIES LLC

AI summary

A backlight includes a light guide plate, an optical member, a frame, and an adhesive agent. The optical member is disposed to face the light guide plate. The optical member has a sheet-like shape. The frame is configured to enclose the light guide plate and the optical member. The adhesive agent is disposed in a first hole of the frame and in a space which communicates with the first hole and includes a cutout or a hole of each of the light guide plate and the optical member. The adhesive agent is configured to fix the light guide plate and the optical member.