Single Phosphor Device Illumination System for Projectors
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Solution Overview
Problem
Conventional projector illumination systems face issues with high manufacturing costs, complex fabrication processes, low luminance, insufficient color purity, and impaired imaging quality due to the use of multiple phosphor wheels and blue solid-state light-emitting elements, which result in limited output light and poor brightness control.
Innovation Solution
A single phosphor device is employed to convert a first waveband light into a third waveband light, which is then separated into primary color lights, reducing the number of solid-state light-emitting elements and phosphor devices, and enhancing color purity and imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple phosphor wheels and blue solid-state light-emitting elements are used to produce three primary color lights, then the illumination system can achieve color output, but the manufacturing cost increases and the fabrication process becomes complex
Solution Approach 1:
The patent merges multiple phosphor wheels and blue solid-state light-emitting elements into a single integrated illumination system. Specifically, it uses one blue solid-state light-emitting element combined with a single phosphor device that contains multiple phosphor materials, thereby reducing the total number of components while maintaining the capability to produce three primary color lights (red, green, and blue). This consolidation directly addresses the technical contradiction by simplifying the fabrication process and reducing device complexity.
Solution Approach 2:
The single phosphor device in the patent performs multiple functions that previously required separate components. It simultaneously converts blue light into red, green, and blue primary colors through different phosphor materials within the same device, enabling the illumination system to generate all three primary color lights using only one blue solid-state light-emitting element and one phosphor device, thus reducing overall system complexity.
2Ease of manufacture
If multiple phosphor wheels and blue solid-state light-emitting elements are used, then color output is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple phosphor wheels and blue solid-state light-emitting elements into a single integrated illumination system. Specifically, it uses one blue solid-state light-emitting element combined with a single phosphor device that contains multiple phosphor materials, thereby reducing the total number of components while maintaining the capability to produce three primary color lights (red, green, and blue). This consolidation directly addresses the technical contradiction by simplifying the fabrication process and reducing device complexity.
3Illumination intensity
If conventional illumination systems with multiple components are used, then three primary color lights can be produced, but luminance and brightness are limited
Solution Approach 1:
The patent merges multiple phosphor wheels and blue solid-state light-emitting elements into a single integrated illumination system. Specifically, it uses one blue solid-state light-emitting element combined with a single phosphor device that contains multiple phosphor materials, thereby reducing the total number of components while maintaining the capability to produce three primary color lights (red, green, and blue). This consolidation directly addresses the technical contradiction by simplifying the fabrication process and reducing device complexity.
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 solution simplifies the fabrication process, reduces costs, and increases luminance and brightness while improving color performance by using a single phosphor device to produce three primary color lights with enhanced color separation and time division projection.
Implementation Method 1
a phosphor device (40), a first solid-state light-emitting element (41), and a second solid-state light-emitting element (42). The phosphor device (40) comprises a first section (401) containing a first phosphor agent (402). The first solid-state light-emitting element (41) is used for emitting a first waveband light (L1) to the phosphor device (40). By the first phosphor agent (402), the first waveband light (L1) is converted into a third waveband light (L3)
Data Source
Figure 1A~1B
Figure 2A
Figure 2B~2C
AI summary
A phosphor device (40, 45) of an illumination system (4) is provided. The illumination system (4) emits a first waveband light (L1) and has an optical path (P). The phosphor device (40, 45) includes a first section (401, 451) and a first phosphor agent (402). The first phosphor agent (402) is coated on the first section (401, 451). After the first waveband light (L1) is received by the first phosphor agent (402), the first waveband light (L1) is converted into a third waveband light (L3), and the third waveband light (L3) is directed to the optical path (P), so that the third waveband light (L3) is separated into at least two color lights (C1, C2) along the optical path (P).