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Compact LED projector design with high uniformity and efficiency.

Wen-Shing Sun, Chuen-Lin Tien, Chao-Hui Ma

|October 17, 2014

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This study designed a compact LED projector using a novel illumination and imaging system. The new design significantly improves light uniformity and projector efficiency for enhanced image quality.

Area of Science:

Optics and Photonics
Optical Engineering

Background:

Traditional LED projectors face challenges with light uniformity and size.
Improving optical engine efficiency and image contrast is crucial for advanced display technologies.

Purpose of the Study:

To design a compact LED projector with enhanced illumination and imaging optical systems.
To improve light intensity uniformity and overall projector efficiency.

Main Methods:

Designed a novel illumination system using an RGB LED, collimator lens group, mirror, color filter, and lens array integrator.
Developed an imaging optical system with eight lenses (six spherical, two aspherical) and a total internal reflection prism.
Utilized optical simulation software for system analysis, including tolerance analysis.

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Main Results:

Achieved screen uniformity exceeding 82%.
Increased projector efficiency by over 44%.
Reduced the overall optical engine size and enhanced image contrast ratio.

Conclusions:

The designed compact LED projector demonstrates superior light uniformity and efficiency.
The novel optical design offers a significant improvement in projector performance and image quality.