Liquid crystal cells – elements and systems – Liquid crystal system – Heads-up display
Patent
1997-07-08
2000-08-08
Parker, Kenneth
Liquid crystal cells, elements and systems
Liquid crystal system
Heads-up display
349 57, 359630, 345 7, G02F 11335, G02B 2714
Patent
active
061009431
ABSTRACT:
A display device for a transportation includes: a display unit displaying a display image on front and rear face sides, the display images displayed on the rear face side being in mirror image relationship with each other; and an optical member for inverting the display image displayed on the rear face side; wherein the display image displayed on the front face side is directly seen by a driver and the display image displayed on the rear face side is inverted by the optical member, so as to see in the same direction of the display image displayed on the front face side. The above display unit may be constituted by a light source having plural color spectra; an attenuation filter in which a transmittance for light emitted from the light source can be partly changed by an external signal; and a transparent light guide plate which guides light emitted from the light source to at least one of front and rear faces of the attenuation filter.
REFERENCES:
patent: 4635033 (1987-01-01), Inuaki et al.
Koide Nobuaki
Matsumoto Yasuyo
Nishiura Yozo
Takada Kensaku
Harness System Technologies Research, Inc.
Parker Kenneth
Sumitomo Electric Industries Ltd.
Sumitomo Wiring Systems Ltd.
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