Optical Sheet Prism Pattern Layer Color Gamut Enhancement
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Solution Overview
Problem
Conventional optical sheets in display devices face challenges in enhancing color gamut while maintaining luminance, often leading to complex manufacturing processes and increased thickness due to the addition of filter layers.
Innovation Solution
An optical sheet comprising a prism sheet with a prism pattern layer containing a light absorber that selectively absorbs light in a specific wavelength band, integrated with a light diffusion layer, to enhance color gamut without significant luminance loss, and simplified manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a filter layer is added to enhance color gamut, then color performance is improved, but manufacturing complexity increases and overall thickness increases
Solution Approach 1:
The patent combines the filter layer function with the prism sheet by integrating the light absorber directly into the prism pattern layer. This merging eliminates the need for a separate filter layer, simplifying the manufacturing process while maintaining color gamut enhancement functionality.
Solution Approach 2:
The prism pattern layer is given multiple functions: it provides the optical prism function for light control and simultaneously serves as the filtering function through the integrated light absorber. This multi-functionality reduces the number of separate components needed.
2Manufacturing precision
If a filter layer is added to enhance color gamut, then color performance is improved, but overall thickness increases
Solution Approach 1:
The filter layer is merged with the prism sheet structure, eliminating the need for additional thickness from a separate filter component. The light absorber is incorporated within the existing prism pattern layer thickness.
3Manufacturing precision
If a light absorber is added to the prism pattern layer, then color gamut is enhanced, but luminance decreases due to light absorption
Solution Approach 1:
The light absorber is selectively applied only in specific wavelength ranges that need filtering, rather than uniformly across all wavelengths. This localized approach enhances color gamut by blocking unwanted wavelengths while preserving luminance in the visible spectrum.
Solution Approach 2:
The patent optimizes the concentration and type of light absorber to achieve the right balance between color gamut enhancement and luminance maintenance. By adjusting the absorption characteristics, the system blocks harmful wavelengths while allowing beneficial light to pass.
4Manufacturing precision
If organic dye is used as light absorber, then color selectivity is improved, but degradation occurs due to UV curing
Solution Approach 1:
A UV absorber is introduced as an intermediary substance that protects the organic dye from UV degradation. The UV absorber absorbs the harmful UV radiation before it can damage the dye molecules, thereby maintaining the dye's color selectivity and stability.
Solution Approach 2:
The UV absorber provides beforehand protection against UV-induced degradation of the organic dye. By incorporating the UV absorber into the prism pattern layer composition, the system pre-defends against potential damage before it occurs.
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 optical sheet achieves improved color gamut and luminance by selectively absorbing unwanted wavelengths, while preventing degradation of organic dyes through UV curing, thus enhancing the performance of display devices like LCDs.
Implementation Method 1
the prism pattern layer comprises a light absorber that selectively absorbs light in a specific wavelength band
Implementation Method 2
securing optical and mechanical properties while preventing a degradation of organic dyes due to UV curing
Data Source
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Figure 3
Figure 4~5a
AI summary
An optical sheet according to an embodiment of the invention comprises a base layer, and a prism sheet comprising a prism pattern layer disposed on the base layer, wherein the prism pattern layer comprises a light absorber that selectively absorbs light in a specific wavelength band, and the light absorber comprises at least one organic dye. An optical sheet according to another embodiment of the invention comprises a base layer, a prism sheet comprising a prism pattern layer disposed on the base layer, and a light diffusion layer disposed under the prism sheet, wherein the prism pattern layer comprises a light absorber that selectively absorbs light in a specific wavelength band. In the optical sheet according to an embodiment of the invention, at least one organic dye that selectively absorbs light in a specific wavelength band is added to a prism pattern layer, whereby it is possible to provide an optical sheet by a simpler manufacturing process than before, in which the color gamut is enhanced while a decrease in luminance due to light absorption is minimized. In addition, it is possible to secure optical and mechanical properties while preventing a degradation of organic dyes due to UV curing by adjusting the composition of the prism pattern layer.