Apparatus for promoting the vigilance of a vehicle operator usin

Details Apparatus for promoting the vigilance of a vehicle operator usin Apparatus for promoting the vigilance of a vehicle operator usin

1989-06-29

1990-06-26

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358250, 340980, 340705, H04N 718

Patent

active

049376659

ABSTRACT:
The present invention is heads up display for use in a ground vehicle. A video program source and a display device produce a set of visual images which are reflected to only one eye of the driver via a mirror disposed on the windshield at a position slightly above the normal line of sight of the driver. This mirror has a size which is a small fraction of the windshield area, a width less than the interpupilary distance, and has a size relative to the size of the display device and the distance from the driver to the display device to reflect an image of the display device to only one eye of the driver. This could be either the left eye or the right eye. The display device is surrounded by a dark unobtrusive background which enables the reflected image other than the display to be visually uninteresting. The mirror has a optical power for reflecting a collimated image focused at visual infinity. A hood is provided for the display to prevent direct ambient light from falling on the display, thus preserving the contrast of the display. The apparatus optionally includes a second mirror which enables the passenger to also view an image of the display device.

REFERENCES:
patent: 4635033 (1987-01-01), Inukai et al.
patent: 4740280 (1988-04-01), Brown et al.
patent: 4790613 (1988-12-01), Moss
patent: 4831366 (1989-05-01), Iino
patent: 4832427 (1989-05-01), Namba et al.
patent: 4837551 (1989-06-01), Iino

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