Fluorescent Filter Converts Blue Light to White for Display Color Adaptation
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Solution Overview
Problem
Conventional display devices have limited color display capabilities, particularly struggling to produce white, which is essential for enhancing display performance by enabling the creation of other colors through filtering.
Innovation Solution
Incorporating a fluorescent filter as a white light converting part on the display side, combined with an additive color filter that can change white light into other colors, and using a smoked plate to suppress light broadening, allowing for improved color adaptation and display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional color filters are used without white light conversion, then the display device has simpler structure, but the color display capability is limited and cannot produce white light
Solution Approach 1:
A fluorescent filter is introduced as an intermediary component between the light source and the color filters. This fluorescent filter converts blue light from the light source into white light, which then passes through the color filters to produce various display colors. This intermediary conversion enables full-color display capability including white, without requiring multiple light sources or complex filter arrangements.
Solution Approach 2:
The patent changes the spectral parameters of the light by using a fluorescent filter to convert blue light (specific wavelength) into white light (broad spectrum). This parameter transformation allows the subsequent color filters to function effectively across the visible spectrum, enabling diverse color display capabilities from a single blue light source.
2Adaptability or versatility
If a fluorescent filter is added to convert blue light to white light, then white light production is enabled, but the device structure becomes more complex
Solution Approach 1:
The fluorescent filter serves multiple functions simultaneously: it converts blue light to white light, acts as a wavelength converter for the color filters, and enables the display to show white color directly. This multi-functionality justifies the addition of the component by delivering multiple benefits from a single element.
Solution Approach 2:
The patent uses a fluorescent filter made of composite material that contains phosphors or fluorescent dyes embedded in a transparent matrix. This composite structure enables the conversion of blue light to white light while maintaining optical clarity, achieving the desired function without excessive structural complexity.
3Adaptability or versatility
If additive color filters are used to expand color range, then more colors can be displayed, but the device structure becomes more complex
Solution Approach 1:
The color filtering function is segmented into multiple independent additive color filters (red, green, blue filters) that can be selectively applied. Each filter handles a specific color range, and their combination through the fluorescent filter enables full-color display. This segmentation allows flexible color control while maintaining a relatively simple overall structure.
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 configuration enables the production of white light, expanding the range of colors that can be displayed, thereby enhancing the display device's performance and allowing for displays in both similar and different categories.
Implementation Method 1
the white light converting part is a fluorescent filter
Implementation Method 2
the additive color filter produces the first display in the substantially same color as color of the second display
Implementation Method 3
The first to third printed area parts, the white light converting part and the smoked lens are arranged in order thereof to form a layer structure so that broadening of the first and second lights passing through the printed area parts and entering the fluorescent filter can be suppressed
Data Source
Figure 1~2
Figure 3~4B
Figure 5
AI summary
A display device includes a first light source (3) for emitting first light in blue, a second light source (4) for emitting second light, and a color filter (10). The filter (10) has a translucent sheet (10e), a first printed area part (10a) for passing the first light to provide a first display excluding an overlapped portion of the first display and a second display and preventing the second light from passing therethrough, a second printed area part (10b) for passing the second light to provide the second display excluding the overlapped portion and preventing the first light from passing therethrough, a third printed area part (10c) for dimming and passing the first and second lights to provide the overlapped portion, a background printed area part (10d) for preventing the first and second lights from passing therethrough, and a white light converting part (9) for the first light passing therethrough into white light.