Two-page automotive virtual image display

Details Two-page automotive virtual image display Two-page automotive virtual image display

1990-10-23

1992-06-09

Ng, Jin F.

Communications: electrical

Land vehicle alarms or indicators

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

340705, 340980, 359630, B60Q 100

Patent

active

051210991

ABSTRACT:
A virtual image display for vehicles that includes a first image source for providing first imaging illumination, a second image source for providing second imaging illumination, a combiner responsive to the first and second imaging illumination for producing a combiner imaging illumination output, a negative power aspheric off-axis mirror responsive to the combiner imaging illumination output for providing diverging reflected imaging illumination, and a positive power aspheric off-axis mirror responsive to the diverging imaging illumination for providing converging reflected imaging illumination that produces a virtual image of the image source observable by the vehicle operator. By way of illustrative example, the first image source includes electromechanical gauges, and the second image source includes an alphanumeric display such as a liquid crystal display or a vacuum fluorescent display. The image sources can be selectively illuminated so as to display only one image source at a time, or they can be selectively illuminated so that components of the virtual image are produced by both of the image sources.

REFERENCES:
patent: 4694447 (1987-09-01), Cohen et al.
patent: 4697879 (1987-10-01), Gerbe
patent: 4927234 (1990-05-01), Banbury et al.
patent: 4973139 (1990-11-01), Weinhrauch et al.

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