Adhesive Tape Nonlinear Gaps Backlight Light Leakage

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Solution Overview

Problem

Existing adhesive tapes for backlight units are wasteful due to incorrect sizing, leading to material waste and increased manufacturing costs, and they degrade under temperature changes, affecting light blocking and emission efficiency.

Innovation Solution

The adhesive tape features nonlinear gaps that separate it into multiple bodies, allowing for customizable shapes like L, Z, or S shapes, which prevent light leakage and accommodate thermal expansion, reducing material waste and maintaining effective light blocking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a frame-like continuous closed structure adhesive tape is used, then light leakage is prevented, but material waste increases and manufacturing cost increases

Engineering Contradiction:

Improvelight leakageVSAvoidmaterial waste

Core Design Contradiction:

Object-affected harmful factorsVSLoss of substance

Solution Approach 1:

The adhesive tape is divided into multiple independent adhesive tape bodies separated by nonlinear gaps, allowing only the necessary portions to be manufactured and used, thereby reducing material waste while maintaining light blocking functionality

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If a frame-like continuous closed structure adhesive tape is used, then light leakage is prevented, but manufacturing cost increases

Engineering Contradiction:

Improvelight leakageVSAvoidmanufacturing cost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

3Object-affected harmful factors

If a frame-like continuous closed structure adhesive tape is used, then light blocking is maintained, but deformation occurs under temperature change

Engineering Contradiction:

Improvelight blockingVSAvoiddeformation under temperature change

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The adhesive tape is divided into multiple independent adhesive tape bodies separated by nonlinear gaps, allowing each body to expand or shrink independently under temperature changes, thereby preventing overall deformation while maintaining light blocking functionality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The nonlinear gaps allow the adhesive tape bodies to change their dimensional parameters (expand or shrink) independently in response to temperature changes, maintaining the light blocking function while accommodating thermal expansion

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10473975B2Adhesive tape, backlight unit and display device

Publication Date: 2019.11.12 BOE TECHNOLOGY GROUP CO LTD

AI summary

An adhesive tape, a backlight unit and a display device are provided. The adhesive tape (1) includes a plurality of nonlinear gaps (100) that separate the adhesive tape (1) into a plurality of adhesive tape bodies (11, 12, 2, 3, 2′, 3′, 31′, 33′). The backlight unit includes the adhesive tape for blocking light.