Side-Emitting LED Lens Design for Generating Planar Lighting Source

Yi Ting Sun; Yu Nan Pao; T.H. Lin

doi:10.4028/www.scientific.net/KEM.364-366.152

Paper Titles

Enhancement of the Optical Performances for the LED Backlight Systems with a Novel Dual Lens-Cap
p.132

Free-Form Reflector Design Using Differential Evolution Algorithm
p.138

Microlens Array Homogenizer for Laser Illuminated Projector
p.143

Package for Side Emitting LED
p.148

Side-Emitting LED Lens Design for Generating Planar Lighting Source
p.152

The Design of an Integrated Pick-Up Head for High-Density Digital Versatile Disk, Digital Versatile Disk and Compact Disk
p.156

The Driver Circuit and Focusing Lens Designed for the Laser Range-Finder
p.160

The Optimization of Directly-Under-Light Type Backlight Module Structure for Brightness Uniformity
p.166

Waveguide Structure Design of Adiabatic Optical Directional Couplers Weighted by Sin-Square Function
p.172

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Side-Emitting LED Lens Design for Generating Planar Lighting Source

Abstract:

Side-emitting LED (Light emitting diode) modulation lens is proposed here for generating planar lighting source that can be applied in many fields like LCD backlight or general lighting. The light emitted form the LED light source will be modulated by the proposed lens by the mechanism of multi-refraction. The optical simulation tool ASAP was used during the design procedure. Optimal lens dimension was designed to module 70 percent of the emitting energy to the angle range from 70 degree to 110 degree, the angle was calculated from the normal direction of the LED horizontal plane to the direction of the emitting light. The lens prototype was also fabricated and the optical performance was measured to verify the simulation results. Finally, the comparison between the optical simulation and the experiment performances is also disclosed.