Rotating Fluorescent Plate Single Layer Illumination
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Solution Overview
Problem
Existing illumination devices for projectors, which use a rotating fluorescent plate with multiple fluorescent layers, face complexity in manufacturing and difficulty in applying to liquid crystal projectors that require sequential color switching without color breakup, due to the need for multiple fluorescent layers and sequential color emission.
Innovation Solution
An illumination device with a single fluorescent layer continuously formed on a circular disk, converting excitation light into multiple colored light beams, simplifying manufacturing and enabling application to non-color sequential liquid crystal projectors by ensuring consistent color emission and efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple fluorescent layers are formed on the circular disk to obtain multiple colored light beams, then the variety of colored light beams is improved, but the manufacturing process complexity increases
Solution Approach 1:
The patent combines multiple fluorescent materials (red-emitting and green-emitting materials) into a single fluorescent layer, eliminating the need for separate layers. This single layer contains both types of fluorescent materials that can be simultaneously excited by the blue light source, producing both red and green light beams while simplifying the manufacturing process.
Solution Approach 2:
The patent uses composite fluorescent materials within a single layer, combining red-emitting fluorescent material and green-emitting fluorescent material in the same layer. This composite approach allows multiple wavelengths to be generated from one layer, reducing manufacturing complexity while maintaining the ability to produce multiple colored light beams.
2Quantity of substance
If multiple fluorescent layers are used with sequential color switching, then multiple colored light beams are obtained, but the applicability to non-color sequential liquid crystal projectors deteriorates
Solution Approach 1:
The patent merges red and green fluorescent materials into a single layer that can emit both colors simultaneously or in rapid succession within one rotational position. This allows the illumination device to provide multiple colored light beams without requiring sequential switching between separate layers, making it compatible with non-color sequential liquid crystal projectors that require simultaneous or near-simultaneous multi-color illumination.
3Device complexity
If a single fluorescent layer is used to simplify manufacturing, then the manufacturing process is simplified, but the ability to emit multiple colored light beams may be compromised
Solution Approach 1:
The patent employs composite fluorescent materials within the single layer, incorporating both red-emitting fluorescent material and green-emitting fluorescent material. This composite structure enables the single layer to produce multiple colored light beams through simultaneous or sequential emission, maintaining manufacturing simplicity while achieving the required multi-color capability.
Solution Approach 2:
The patent applies different fluorescent materials at different locations or regions within the single fluorescent layer. By distributing red-emitting and green-emitting materials throughout the layer, the system maintains the simplicity of a single layer structure while ensuring multiple colored light beams are generated through the local properties of different material regions.
4Temperature
If the fluorescent layer is continuously formed along the circumferential direction, then heat dissipation is improved, but the device complexity increases
Solution Approach 1:
The patent forms the fluorescent layer continuously along the circumferential direction of the rotating disk, creating a curved, circular arrangement rather than a linear one. This curved configuration increases the effective surface area for heat dissipation and allows heat to be distributed around the circumference of the disk, improving thermal management while maintaining a relatively simple structural form that integrates with the rotating disk design.
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 allows for the production of multiple colored light beams using a single fluorescent layer, simplifying the manufacturing process and enabling the illumination device to be applied to liquid crystal projectors without color breakup, while preventing overheating and maintaining luminous efficiency.
Implementation Method 1
a rotating fluorescent plate having a single fluorescent layer formed on a circular disk, which can be rotated by a motor, continuously along a circumferential direction of the circular disk. The single fluorescent layer converts a part or whole of the excitation light beam into a fluorescent light beam that includes two or more colored light beams.
Data Source
AI summary
An illumination device includes: a light source device adapted to emit an excitation light beam; and a rotating fluorescent plate having a single fluorescent layer adapted to convert a part or whole of the excitation light beam into a fluorescent light beam. The fluorescent light beam includes two or more colored light beams, and the single fluorescent layer is formed on a circular disk, which can be rotated by a motor, continuously along a circumferential direction of the circular disk.