UV LED Display with Fluorescent Layers for 3D Color Balance
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Solution Overview
Problem
Blue light emitting diodes with large peak values and small full width at half maximum (FWHM) are not effectively used in 3D image display apparatus due to difficulties in wavelength separation for left-eye and right-eye images, leading to differences in color reproducibility and brightness between the two images.
Innovation Solution
A display apparatus utilizing ultraviolet ray light emitting diodes (UV LEDs) with fluorescent substance layers emitting blue, green, and red lights, and band-pass filters to separate and output specific wavelengths for improved 3D image display, reducing color and brightness differences between left-eye and right-eye images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a blue light emitting diode is used as the light source, then the light source can be compact and efficient, but the wavelength separation for left-eye and right-eye images becomes difficult due to the large peak value and small full width at half maximum of the blue light
Solution Approach 1:
The patent changes the light source wavelength from blue to ultraviolet, which fundamentally alters the spectral characteristics. This parameter change enables better wavelength separation for 3D image display while maintaining compactness and efficiency. The ultraviolet light source with its distinct spectral signature allows for effective separation of left-eye and right-eye images through wavelength multiplexing.
2Adaptability or versatility
If wavelength separation is implemented for 3D image display, then left-eye and right-eye images can be distinguished, but color reproducibility and brightness differences occur between the two images
Solution Approach 1:
The patent segments the spectral range by using multiple band-pass filters with different center wavelengths (e.g., 480nm, 530nm, 620nm) to separate the ultraviolet light into distinct color channels. This segmentation enables independent control and optimization of each wavelength component, allowing for balanced color reproduction and brightness in both left-eye and right-eye images while maintaining 3D display capability.
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 and brightness differences between left-eye and right-eye images, enhancing the display quality of 3D images by using UV LEDs with fluorescent substances and band-pass filters to manage light wavelengths.
Implementation Method 1
a fluorescent substance layer disposed on the light emitting diode, where the fluorescent substance layer includes: a blue fluorescent substance layer which receives the ultraviolet ray and emits blue light; a green fluorescent substance layer which receives the ultraviolet ray and emits green light; and a red fluorescent substance layer which receives the ultraviolet ray and emits red light
Implementation Method 2
a first band-pass filter which receives the blue light, the green light and the red light and outputs the first blue light, the first green light and the first red light
Data Source
AI summary
A display apparatus includes a backlight unit which generates first light including first blue light, first green light and first red light and a display panel which receives the first light to display an image, where the backlight unit includes: a light emitting diode which generates an ultraviolet ray; a fluorescent substance layer disposed on the light emitting diode, where the fluorescent substance layer includes: a blue fluorescent substance layer which receives the ultraviolet ray and emits blue light; a green fluorescent substance layer which receives the ultraviolet ray and emits green light; and a red fluorescent substance layer which receives the ultraviolet ray and emits red light; and a first band-pass filter which receives the blue light, the green light and the red light and outputs the first blue light, the first green light and the first red light.