Integrated Light Guide Plate Back Cover for LCD Wrinkle Prevention
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Solution Overview
Problem
Liquid crystal display devices face limitations in improving picture quality due to the wrinkling of reflective sheets caused by humidity or heat, leading to deteriorated image quality.
Innovation Solution
A back cover integrated with a light guide plate, where a reflective sheet is attached to a cover glass, and the light guide plate is bonded to the cover glass, using a coupling member to prevent wrinkling and enhance rigidity, thereby maintaining image quality and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a reflective sheet is used in the back light unit, then light reflection efficiency is improved, but the reflective sheet can be wrinkled due to humidity or heat, causing picture quality deterioration
Solution Approach 1:
The patent integrates the light guide plate and back cover into a single unified structure. The light guide plate serves dual functions: guiding light and acting as a rigid support that prevents the reflective sheet from wrinkling due to humidity or heat, thereby maintaining both light reflection efficiency and picture quality
Solution Approach 2:
The integrated back cover structure combines the light guide plate (made of light-transmitting material) with the back cover (made of structural material) into a composite assembly. This composite structure provides both optical functionality and mechanical support to protect the reflective sheet
2Ease of manufacture
If the light guide plate and cover glass are integrated with the same material, then manufacturing process is simplified, but the structure may lack sufficient rigidity to prevent damage during manufacturing
Solution Approach 1:
The light guide plate and back cover are merged into a single integrated structure that is manufactured as one piece. This eliminates the need for separate assembly steps while the integrated design inherently provides sufficient rigidity to prevent damage during handling and manufacturing processes
Data Source
AI summary
A back cover integrated with a light guide plate and a method of manufacturing the same, and a back light unit and a liquid crystal display device including the same are disclosed. The back cover integrated with a light guide plate comprises a reflective sheet attached onto a cover glass; a light guide plate attached onto the cover glass to cover the reflective sheet; and a light guide plate coupling member between the light guide plate and the cover glass.