Optical-Path Adjustment Film Dome Patterns for Display Color Deviation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices, such as LCD and electroluminescent displays, suffer from picture quality deterioration at lateral viewing angles due to uneven light emission across different wavelength ranges, leading to a bluish image issue, particularly with short wavelength light like blue being overemitted compared to long wavelength light like red.
Innovation Solution
A display device incorporating an optical-path adjustment film on the upper surface of the display panel, featuring dome patterns with a refractive index different from the cover layer, adjusts the optical path of light emitted from each wavelength range to prevent bluish images by refracting light differently based on its wavelength, ensuring balanced emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light is emitted from the display panel at lateral viewing angles, then the display provides wide viewing coverage, but the emission amount of short wavelength light (blue) increases relative to long wavelength light (red), causing a bluish image and color deviation
Solution Approach 1:
The patent applies local quality by creating dome patterns with different refractive indices in specific regions of the optical-path adjustment film. The first dome patterns (with first refractive index) and second dome patterns (with second refractive index) are positioned at different locations to selectively adjust the emission amounts of different wavelength ranges at lateral viewing angles, thereby correcting color deviation while maintaining wide viewing coverage
Solution Approach 2:
The patent changes the refractive index parameter of the optical-path adjustment film by using multiple dome patterns with different refractive indices. This parameter change allows selective control over the emission amount of different wavelength ranges (blue vs red light) at lateral viewing angles, correcting the bluish image problem while preserving wide viewing angle performance
2Manufacturing precision
If an optical-path adjustment film with dome patterns is added to correct color deviation, then color accuracy is improved, but the device structure becomes more complex
Solution Approach 1:
The patent merges the color correction function with the existing optical-path adjustment film structure by integrating dome patterns directly into the film. This combination approach corrects color deviation at lateral viewing angles without requiring separate additional optical components, thereby limiting the increase in device complexity while achieving improved color accuracy
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 effectively reduces color deviation and improves picture quality by adjusting the refractive indices of the dome patterns and cover layer, enhancing the display's performance at lateral viewing angles and preventing bluish images.
Implementation Method 1
an optical-path adjustment film on an upper surface of a display panel... a refractive index of the plurality of dome patterns is different from a refractive index of the cover layer... adjusts the optical path of light emitted from each wavelength range to prevent bluish images by refracting light differently based on its wavelength
Data Source
AI summary
Disclosed is a display device capable of preventing a problem related with a bluish image at a lateral viewing angle by the use of optical-path adjustment film on an upper surface of a display panel, wherein the display device may include a display panel, and an optical-path adjustment film on the display panel, wherein the optical-path adjustment film includes a plurality of dome patterns, and a cover layer on the plurality of dome patterns, wherein a refractive index of the plurality of dome patterns is different from a refractive index of the cover layer.