Wavelength Compensator for LCD Eye Fatigue Reduction
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Solution Overview
Problem
LCD devices cause eye fatigue and irritation due to the linearly polarized light they emit, which is not as comfortable for the human eye as natural light, leading to increased eye strain, especially during prolonged use.
Innovation Solution
An optical component comprising a transparent substrate with a wavelength compensator that converts linearly polarized light into circularly or elliptically polarized light, reducing eye fatigue by altering the polarization state of the output light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If LCD devices use linearly polarized light for display operation, then display functionality is achieved, but eye fatigue and irritation increase
Solution Approach 1:
The patent applies parameter changes by transforming the polarization state of light from linear to circular or elliptical using a wavelength compensator. This changes the optical parameter of the light while maintaining the display functionality, thereby reducing eye fatigue without sacrificing display performance
Solution Approach 2:
The wavelength compensator acts as an intermediary component between the LCD display and the viewer's eye. It converts the linearly polarized light emitted by the LCD into circularly or elliptically polarized light, serving as a mediator that reduces eye fatigue while preserving display functionality
2Adaptability or versatility
If LCD devices emit linearly polarized light, then light patterns can be displayed through liquid crystal orientation, but comfort for natural human vision is reduced
Solution Approach 1:
The patent changes the polarization parameter of the light from linear to circular or elliptical state. This parameter transformation maintains the ability to display light patterns through liquid crystal orientation while improving visual comfort by matching natural light characteristics
Solution Approach 2:
The patent converts the harmful effect of linearly polarized light (causing eye fatigue) into a beneficial circularly or elliptically polarized light. The wavelength compensator transforms the polarization state, turning the harmful linear polarization into beneficial circular/elliptical polarization that is more comfortable for natural vision
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 component effectively decreases eye fatigue and irritation by changing the polarization state of the light emitted from LCD devices, making it more comfortable for viewers to use them for extended periods without polarizing spectacles.
Implementation Method 1
An optical component comprising a transparent substrate with a wavelength compensator that converts linearly polarized light into circularly or elliptically polarized light
Implementation Method 2
a wavelength compensator (203) capable of converting an output light of the LCD device from a substantially linearly polarized light into a substantially circularly or elliptically polarized light
Data Source
AI summary
An optical component capable of changing polarization light state and a liquid crystal display (LCD) device using the same are provided. The optical component including a transparent substrate and a wavelength compensator is disposed at any position from the outer side of the LCD device to the outside in an output direction of an output light. The wavelength compensator is directly attached to the surface of the substrate to convert an output light of the LCD device from a linearly polarized light into a circularly polarized light or an elliptically polarized light, thereby effectively reducing eye fatigue. The LCD device is provided with such an optical component such that a linearly polarized light emerging from the LCD device is converted into a circularly polarized light or an elliptically polarized light to lessen the eye fatigue.