Display unit

Details Display unit Display unit

1987-11-30

1989-08-15

LaRoche, Eugene R.

350334, 350345, G02F 1135, G02F 101

Patent

active

048568775

ABSTRACT:
A display unit having a light-receiving type display device for displaying an information by receiving light from external light source and a self-illuminating type display device provided under the light-receiving type display device for acting as the external light source for the light-receiving type display device and for displaying information different from the information displayed by the light-receiving type display device. The light-receiving type display device and the self-illuminating type display device each display a predetermined pattern different from the other. Accordingly, this display unit is capable of displaying the predetermined patterns of the self-illuminating type display device by controllably causing the self-illuminating type display device to display its patterns and is also capable of displaying the predetermined patterns of the light-receiving type display device by controllably causing the self-illuminating type display device to act as the light source of the light-receiving type display.

REFERENCES:
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patent: 4294518 (1981-10-01), O'Connor et al.
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patent: 4432612 (1984-02-01), Nicholson et al.
patent: 4449123 (1984-05-01), Muranaga
patent: 4456337 (1984-06-01), Nicholson
patent: 4562433 (1985-12-01), Biferno
patent: 4580877 (1986-04-01), Washo
patent: 4597662 (1986-07-01), Hirata et al.
patent: 4748546 (1988-05-01), Ukrainsky

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