Composite Optical Sheet for Thin LCDs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid-crystal display devices face challenges in reducing thickness while maintaining optical modulation characteristics and preventing warping or wrinkling of optical sheets due to their weight, especially as devices become larger and bezels thinner.
Innovation Solution
A composite optical sheet is designed with a first optical functional layer having recesses, a support layer, and a polarizing layer, where the layers are coupled with adhesive layers to enhance rigidity and reduce thickness, incorporating bead coating layers for improved durability and light modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple optical sheets are disposed sheet by sheet and spaced apart, then each sheet can perform its optical modulation function, but the overall thickness of the display device increases
Solution Approach 1:
The patent combines multiple optical sheets (prism sheet, light-concentrating sheet, and polarizing sheet) into a single integrated composite optical sheet. The different optical functional layers are laminated together with adhesive layers, merging what were previously separate spaced-apart sheets into one unified structure that maintains all required optical modulation functions while reducing overall thickness.
Solution Approach 2:
The patent creates a composite optical sheet using composite material structure, where different optical layers (prism layer, light-concentrating layer, polarizing layer) are combined with adhesive layers to form a multi-layer composite. This composite structure allows the single sheet to perform multiple optical functions that previously required separate sheets.
2Reliability
If optical sheets are disposed sheet by sheet, then each sheet can be individually optimized for its function, but the sheets become warped or wrinkled due to their own weight
Solution Approach 1:
By merging multiple optical sheets into a single composite structure, the patent eliminates the problem of individual sheets warping or wrinkling due to their own weight. The combined composite sheet acts as a unified structure with improved dimensional stability, preventing the warping issues that occur when multiple separate sheets are stacked and spaced apart.
3Length of moving object
If the bezel is made thinner to reduce device thickness, then the display device becomes more compact, but the optical sheets become more susceptible to warping and wrinkling
Solution Approach 1:
The patent resolves this contradiction by combining optical sheets into a single composite structure that maintains flatness and stability even when the bezel is made thinner. The integrated composite optical sheet eliminates the warping susceptibility of individual sheets, allowing for thinner bezel design without compromising optical sheet stability.
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 composite optical sheet achieves reduced thickness, improved luminance, and enhanced rigidity, preventing warping and wrinkling, thus enabling a narrow bezel and better display quality in liquid-crystal display devices.
Implementation Method 1
a first optical functional layer having a first surface and a second surface, the first surface including a reference plane and a pattern of recesses dented from the reference plane; a second optical functional layer disposed on the first support layer and including a pattern of prisms extended in a first direction
Implementation Method 2
a first adhesive layer disposed between the first optical functional layer and the first support layer, wherein the first optical functional layer is coupled with the first adhesive layer by penetrating into the first adhesive layer at least partially
Data Source
AI summary
Provided are a composite optical sheet and a liquid crystal display device including the same. The composite optical sheet includes: a first optical functional layer having a first surface and a second surface, the first surface including a reference plane and a pattern of recesses dented from the reference plane; a first support layer disposed on the first surface of the first optical functional layer; a first adhesive layer disposed between the first optical functional layer and the first support layer, wherein the first optical functional layer is coupled with the first adhesive layer by penetrating into the first adhesive layer at least partially; a second optical functional layer disposed on the first support layer and including a pattern of prisms extended in a first direction; a polarizing layer disposed on the second optical functional layer; and a second adhesive layer disposed between the second optical functional layer and the polarizing layer, wherein the second optical functional layer is coupled with the second adhesive layer by penetrating into the second adhesive layer at least partially.