Liquid Crystal Display Anti-Reflective Front Plate
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Solution Overview
Problem
Liquid crystal displays face issues with low wear resistance and excessive surface reflection, leading to visibility degradation and potential damage from impacts, especially with the use of thin polarizing plates and glass sheets in larger screen sizes.
Innovation Solution
A transparent front plate with an anti-reflecting membrane made of silicon oxide and a transparent organic medium layer is introduced between the polarizing plate and the liquid crystal cell, enhancing wear resistance and reducing reflection by filling the air gap and improving the adherence of the polarizing plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent resin plate is provided on the polarizing plate to prevent direct contact with clothes, then wear resistance is improved, but strong reflection of ambient objects occurs due to light reflection at the opposite surfaces of the transparent resin plate, degrading visibility at bright places
Solution Approach 1:
An anti-reflecting membrane is introduced as an intermediary layer between the transparent resin plate and the liquid crystal display. This membrane reduces the reflection of ambient objects at the surface, eliminating the visibility degradation problem while preserving the protective function of the resin plate against clothing contact
Solution Approach 2:
The liquid crystal display employs a composite structure combining the transparent resin plate with an anti-reflecting membrane layer. This composite material approach allows the system to simultaneously achieve the wear resistance of the resin plate and the anti-reflection properties of the specialized membrane coating
2Device complexity
If the glass plate thickness is reduced to 0.5 to 0.7 mm, then device complexity is reduced, but the glass plate may be broken when held using excessive force during transportation or wiring procedures
Solution Approach 1:
A cushioning layer is provided between the liquid crystal cell and the front plate, creating a protective buffer that absorbs impact forces before they reach the thin glass plates. This beforehand cushioning allows the use of thinner glass plates (0.5 to 0.7 mm) while preventing breakage during handling and transportation
3Ease of manufacture
If two glass sheets with small thickness of 0.5 to 0.7 mm are used to seal liquid crystals, then ease of manufacture is improved, but the glass sheets may be broken when held using force higher than required during transportation or wiring procedures
Solution Approach 1:
The cushioning layer positioned between the liquid crystal cell and front plate provides protective buffering that prevents excessive force transmission to the thin glass sheets (0.5 to 0.7 mm) during handling operations. This allows manufacturers to use thinner, easier-to-manage glass sheets without compromising their strength during transportation and wiring procedures
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 improves wear resistance, reduces surface reflection, and allows for easier handling and manufacturing of liquid crystal displays without increasing the accuracy of holding forces during manufacturing, while maintaining image quality and durability.
Implementation Method 1
a transparent organic medium layer arranged between the front plate and the liquid crystal cell
Implementation Method 2
an anti-reflecting membrane made of silicon oxide
Data Source
AI summary
Manufacture of a liquid crystal display is disclosed. The liquid crystal display includes a backlight unit, a backlight unit-side polarizing plate, and a liquid crystal cell held by two glass plates, the liquid crystal cell having an electrode, a liquid crystal layer, an alignment layer, and a color filter arranged between the glass plates. The liquid crystal display also includes a transparent front plate arranged at a side of the liquid crystal cell opposite to the backlight unit, a polarizing plate attached to the liquid crystal cell, and a transparent organic medium layer arranged between the front plate and the liquid crystal cell. Since the front plate is provided at the outermost surface of an image display portion, and the transparent organic medium is filled between the front plate and the liquid crystal module, it is possible to achieve an improvement in wear resistance and a reduction in reflectance.