Liquid Crystal Display Adhesive Layer Segmentation for Compact Frame Design
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Solution Overview
Problem
There is a demand for reducing the thickness and frame area of small and medium-sized liquid crystal display devices, but existing technologies face limitations in processing narrow adhesive sheets and accurately adhering them to maintain a thin and compact structure.
Innovation Solution
A liquid crystal display device design featuring a stacked structure with a substantially rectangular optical switching member, a frame, and a planar light source, where the adhesive layer fixes the optical switching member, frame, and planar light source, with optical sheet groups positioned to minimize the width of the adhesive layer and utilize tongue-shaped portions and step structures to enhance adhesion and reduce thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the adhesive sheet width is narrowed to reduce frame area, then the frame area decreases, but the processing difficulty and adhesion accuracy deteriorate
Solution Approach 1:
The adhesive sheet is segmented into a first adhesive sheet and a second adhesive sheet with different widths. The first adhesive sheet has a wider width for accurate adhesion to the optical switching member, while the second adhesive sheet has a narrower width to reduce the overall frame area. This segmentation allows each adhesive sheet to perform its specific function optimally without compromising processing ease or adhesion accuracy.
Solution Approach 2:
Different regions of the adhesive structure are assigned different qualities (widths) based on local requirements. The region requiring high adhesion accuracy (near the optical switching member) uses a wider adhesive sheet, while the region where space reduction is prioritized (peripheral areas) uses a narrower adhesive sheet. This local differentiation resolves the contradiction between adhesion accuracy and frame area reduction.
2Length of stationary object
If the thickness of the liquid crystal display device is decreased, then the volume and weight are reduced, but the structural complexity increases
Solution Approach 1:
Multiple functional layers (optical switching member, adhesive sheets, frame, polarizers, glass substrates) are merged into a compact stacked structure where components are closely integrated. The adhesive sheets serve dual purposes: bonding different layers together and providing structural support. This merging reduces overall thickness while distributing structural complexity across multiple integrated components rather than requiring a single complex element.
Solution Approach 2:
The structure employs a nested arrangement where smaller components are positioned within or between larger components. The optical switching member with polarizers and glass substrates is nested within the frame structure, with adhesive sheets nested between these layers. This nesting allows efficient space utilization, reducing device thickness while maintaining structural integrity through hierarchical organization.
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 design achieves a thinner and more compact liquid crystal display device with a narrower frame area, overcoming processing limitations and ensuring accurate adhesion without wasting space, thereby reducing the overall thickness and improving structural integrity.
Implementation Method 1
an adhesive layer which fixes the optical switching member, the frame, and the planar light source to each other
Data Source
AI summary
A liquid crystal display device includes a LCD panel having a first polarizer, a first substrate, a second substrate and a second polarizer are sequentially provided from a front surface side, a frame which surrounds the LCD panel and has a first opening having first to fourth sides, a planar light source disposed on the rear surface side of the LCD panel in the first opening, a plurality of optical sheet groups which are disposed between the planar light source and the LCD panel, and an adhesive layer which has a second opening formed along the first to fourth sides of the frame. A front surface side of the adhesive layer is adhered to the LCD panel along at least the first side, and a rear surface side of the adhesive layer is adhered to the plurality of optical sheet groups and the frame along at least the first side.