Head-up display apparatus for vehicular display

Details Head-up display apparatus for vehicular display Head-up display apparatus for vehicular display

1988-06-09

1993-05-25

Weldon, Ulysses

Communications: electrical

Land vehicle alarms or indicators

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

G09G 302

Patent

active

052144135

ABSTRACT:
A head-up display apparatus used as an instrument display of an automobile comprises a hologram combiner provided on the front windshield on which an image is displayed overlapping the field of view. The apparatus includes a display luminosity control system which varies the brightness of the display image gradually or delays an increase and decrease in the brightness in accordance with variations in the ambient light level so as to allow a driver's eyes to adapt to the variations.

REFERENCES:
patent: 3915548 (1975-10-01), Opittek et al.
patent: 4740780 (1988-04-01), Brown et al.
patent: 4808974 (1989-02-01), Vernay

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