Flat parallel light source

Details Flat parallel light source Flat parallel light source

1995-07-18

1998-11-24

Sember, Thomas M.

Illumination

Revolving

362328, 362330, 359 64, 359 65, G01D 1128

Patent

active

058398120

ABSTRACT:
The present invention relates to a flat parallel light source using the principle of the mirror reflection and diffuse reflection, which comprises a light source, a diffuse reflective chamber with high reflectance walls, a light coupler, a small hole array at the top surface of said diffuse reflective chamber, a mirror reflective cone array on the small hole array, and a convex lens array on said cone array. The light generated by the light pass through the light coupler into the diffuse reflective chamber, and then pass through the small hole array, mirror reflective cone array, and lens array to form parallel light. The flat parallel light source can generate a high intensity parallel light with excellent parallelism or a given scattering angle parallel light. It can be used for backlighting for all kinds of LCDs, and other equipment where parallel light is needed. It can also be used in LCDs to increase the brightness of the display image and reduce power consumption.

REFERENCES:
patent: 5055978 (1991-10-01), Rogoff
patent: 5396406 (1995-03-01), Ketchpel
patent: 5598281 (1997-01-01), Zimmerman et al.

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