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LCD GLARE AVOIDANCE USING A SURFACERELIEF DIFFRACTIVE OPTICAL ELEMENT

IP.com Disclosure Number: IPCOM000009839D
Original Publication Date: 2000-May-01
Included in the Prior Art Database: 2002-Sep-23

Publishing Venue

Motorola

Related People

Authors:
Zane Coleman George Valliath

Abstract

Reflective liquid crystal displays (LCD), such as those used in low power portable products, rely on reflected ambient light to illuminate the display. The position of the display, in relation to the light source and the viewer, that provides the brightest image is also the position of glare from the front of the display. This makes the display unreadable and consequently it is viewed at a position just off glare, the position which is not as bright. This approach intentionally mis-aligns the glare light from the useful light reflected from the display to improve considerably the brightness and readability.