Reflection type display with light waveguide with inclined and p

Details Reflection type display with light waveguide with inclined and p Reflection type display with light waveguide with inclined and p

1999-01-20

2000-11-21

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 62, 349 63, 349 65, 362 26, 362 31, G02F 11335, G01D 1128, F21V 704

Patent

active

061510890

ABSTRACT:
A reflection type display device includes a panel, a light guide plate placed external to the panel, and a light source placed at the end of the light guide plate for generating illumination light as required. The light guide plate normally transmits external light onto a first substrate of the panel and emits the external light reflected from a second substrate of the panel, while, as required, guides illumination light onto the first substrate and emits the illumination light reflected from the second substrate. The light guide plate includes a planar section divided into bands and an inclined section lying between each planar section. The light guide plate reflects the illumination light guided from the light source at each inclined section so as to lead it onto the first substrate and emits the illumination light reflected from the second substrate through each planar section and inclined section. The width of the planar section is set to 15 or more times, or preferably 20 or more times, the width of the inclined section.

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