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Improvement of illumination uniformity for LED flat panel light by using micro-secondary lens array
1Institute of Photonic System, National Chiao Tung University,Tainan 71150, Taiwan. mars0409@gmail.com
Optics Express
|November 29, 2012
Summary
This study introduces a micro-secondary lens array to enhance LED flat panel lights, significantly improving illumination uniformity and reducing hot spots for better lighting quality.
Area of Science:
- Optics and Photonics
- Lighting Technology
Background:
- LED flat panel lights offer innovative lighting solutions.
- Existing products suffer from narrow light distribution and hot spots, reducing illumination quality.
Purpose of the Study:
- To improve the illumination uniformity of LED flat panel lights.
- To address drawbacks like narrow lighting areas and hot spots in current designs.
Main Methods:
- Proposed and applied a micro-secondary lens array technique to the light guide surface.
- Adjusted the candela distribution to a batwing-like pattern for uniform light spread.
Main Results:
- Achieved a 61% enhancement in floor illumination uniformity.
- Improved wall illumination uniformity by 20.5%.
Conclusions:
- The micro-secondary lens array effectively enhances LED flat panel light uniformity.
- This technique offers a viable solution for improving lighting quality in flat panel applications.
