Optical Sheet Integrating Prism and Embossing Patterns
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Solution Overview
Problem
The manufacturing costs and thickness of liquid crystal display (LCD) apparatuses increase with the number of optical sheets used, such as diffusing and prism sheets, which are necessary to improve optical properties but are costly and bulky.
Innovation Solution
An optical sheet with a base film, trigonal prism patterns, and embossing patterns on its surface, where the prism patterns have inclined surfaces meeting at peak and valley portions, reducing the need for multiple sheets by incorporating diffusing and light-concentrating functions into a single layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple optical sheets (diffusing sheet, prism sheet, protective sheet) are used to improve optical properties, then the optical performance is improved, but manufacturing costs increase and thickness increases
Solution Approach 1:
The patent combines multiple optical functions (prism sheet for light guiding, diffusing sheet for light diffusion, and protective sheet functions) into a single integrated optical sheet. The sheet contains both prism patterns on its upper surface and embossing patterns (convex or concave) on its lower surface, allowing it to perform multiple optical functions simultaneously and eliminate the need for separate optical sheets.
Solution Approach 2:
The optical sheet is designed to perform multiple functions within a single component: light guiding through the upper prism patterns, light diffusion through the lower embossing patterns, and protective functions. This multi-functional design reduces the total number of components needed in the display apparatus.
2Illumination intensity
If multiple optical sheets are used to achieve desired optical effects, then light diffusion and concentration are improved, but the thickness of the display apparatus increases
Solution Approach 1:
The patent merges the functions of multiple optical sheets into a single integrated sheet with dual-pattern structure. The upper surface prism patterns provide light guiding and concentration, while the lower surface embossing patterns provide light diffusion, achieving both effects in one component rather than requiring stacked sheets.
3Illumination intensity
If multiple optical sheets are used to improve optical properties, then brightness and viewing angles are improved, but manufacturing costs increase
Solution Approach 1:
The patent integrates multiple optical functions into a single sheet that can be manufactured as one component rather than assembling multiple separate sheets. This reduces manufacturing complexity and costs while maintaining the optical performance benefits of having both light guiding and light diffusion capabilities.
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
This solution reduces manufacturing costs and thickness by integrating multiple functions into a single optical sheet, enhancing light diffusion and concentration while maintaining or improving brightness and viewing angles, and preventing scratches on protective or display panels.
Implementation Method 1
Each of the prism patterns has the shape of a trigonal prism and includes a first inclined surface and a second inclined surface. The first and second inclined surfaces are inclined with respect to the upper surface of the base film and meet each other at a peak portion.
Implementation Method 2
First embossing patterns are formed at the peak portion. The first embossing patterns may have a concave shape. The first embossing patterns may have a diameter of about 2 μm to about 3 μm.
Data Source
AI summary
An optical sheet includes a base film, a plurality of prism patterns and a plurality of first embossing patterns. The prism patterns are formed on an upper surface of the base film. Each of the prism patterns has the shape of a trigonal prism and includes a first inclined surface and a second inclined surface. The first and second inclined surfaces are inclined with respect to the upper surface of the base film and meet each other at a peak portion. First embossing patterns are formed at the peak portion.