Computer graphics processing and selective visual display system – Image superposition by optical means
Patent
1992-09-25
1994-04-12
Hjerpe, Richard
Computer graphics processing and selective visual display system
Image superposition by optical means
345 14, 345 16, G09G 104
Patent
active
053029640
ABSTRACT:
A heads-up display (50) for an aircraft includes a digital image generator (52), a cathode ray tube (CRT) (54) and an optical system (56) which projects an image (58) formed on the CRT screen (54a) indicating the status of the aircraft operation onto a holographic mirror combiner (60) at a slant angle. The combiner (60) is transparent to the pilot's direct view through the aircraft windshield, but produces a reflected image of the CRT screen (54a) which is superimposed on the direct view. Pincushion distortion in the CRT (54) and geometric distortion caused by the slant projection angle are corrected by a digital look-up table memory (82, 84) which alters the initially orthogonal CRT horizontal and vertical deflection signals (Vh,Vv) in a manner which is the inverse of the distortion such that the image (58) on the combiner (60) as viewed by the pilot appears undistorted. The size of the look-up table memory (82,84) is greatly reduced by making approximations based on analysis of the mathematical functions which define the distortion.
REFERENCES:
patent: 3422306 (1969-01-01), Gray
patent: 4507656 (1985-03-01), Morey et al.
patent: 4632508 (1986-12-01), Connelly
patent: 4831366 (1989-05-01), Iino
Denson-Low Wanda K.
Gudmestad Terje
Hjerpe Richard
Hughes Aircraft Company
LandOfFree
Heads-up display (HUD) incorporating cathode-ray tube image gene does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Heads-up display (HUD) incorporating cathode-ray tube image gene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heads-up display (HUD) incorporating cathode-ray tube image gene will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2102082