Shuttered display panel

Details Shuttered display panel Shuttered display panel

1990-08-02

1992-05-19

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340717, 340763, 359 36, 359277, G09G 302

Patent

active

051152282

ABSTRACT:
The present invention accomplishes the above objects by employing a display having the capability to emit light and form images viewable from both the front and back of the display. The invention also shutters the images displayed on the front and back of the display so that the images can be correctly displayed depending on the viewpoint of the viewer. Text and images displayed such that they are seen from both the front and back of the display appear differently to the front and rear viewer. Electronic shutters are placed between the display and both the front and rear viewers so that they can be flashed on and off fast enough to provide a stable image appearing to each viewer. The shutters also flash slow enough so that display data can be rewritten to provide each viewer with a correct image. The correct image can be either the corrected image of that image seen by the opposing viewer, or a completely separate image. In this way, simultaneous images appear to both the front and rear viewer. These images can be the same or different even though they appear from the same display. The use of electronic shutters on displays emitting light from both the front and rear of the display, provide the display with multiple functions not possible on conventional displays.

REFERENCES:
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patent: 4373157 (1983-02-01), Holz et al.
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patent: 4562433 (1985-12-01), Biferno
patent: 4688033 (1987-08-01), Carini et al.
patent: 4856877 (1989-08-01), Nishimori et al.
patent: 4973951 (1990-11-01), Shigeta et al.

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