Diffusing/collimating lens array for a liquid crystal display

Details Diffusing/collimating lens array for a liquid crystal display Diffusing/collimating lens array for a liquid crystal display

1990-01-31

1992-07-07

Hille, Rolf

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 48, 359 54, 359 40, 362268, 362297, G02F 113

Patent

active

051287838

ABSTRACT:
Improved backlighting for a liquid crystal display is provided by an integral diffusing/collimating lens fabricated from a translucent optical media in which glass beads are suspended. The optical media is configured in substantially the same shape as the array of lamps which illuminate the backlit display and serves as both a lens and a diffuser. The lens effect is obtained by positioning the optical media so that the focal length thereof is at the lamp location. In this manner, the optical media behaves as a collimating lens. The optical effect simultaneously occurs at the air-to-material interface. Of course, the translucent material from which the media is fabricated diffuses light so as to uniformly distribute light emanating from said lamps in all directions.

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"Polarized Backlight for LCD", Technical Disclosure Bulletin; vol. 33, No. 1B, Jun. 1990.

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