04987410 is referenced by 95 patents and cites 2 patents.

A head-up display (HUD)/head-down display (HDD) system capable of projecting multi-color images employs cholesteric liquid crystal elements, two-state liquid crystal devices, an image source, a beam splitter, and a combiner to, in sequence, generate HUD and HDD images. An LCD and cholesteric liquid crystal element operate together to selectively transmit or block portions of an image incident thereon. The switching frequency of the LCD-cholesteric liquid crystal element is above the flicker-fusion frequency, such that both the HUD and HDD displays appear to the observer to be simultaneously and continuously operating.

Title
Multiple image forming apparatus
Application Number
147834
Publication Number
4987410
Application Date
December 18, 1989
Publication Date
January 22, 1991
Inventor
Thomas M Lewis
Santa Cruz
CA, US
Arthur L Berman
San Jose
CA, US
Agent
Townsend and Townsend
Assignee
Kaiser Aerospace & Electronics Corporation
CA, US
IPC
G09G 1/00
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