Computer graphics processing and selective visual display system – Image superposition by optical means
Patent
1997-08-25
2000-03-14
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Image superposition by optical means
345 8, 345 9, G09G 500
Patent
active
060379146
ABSTRACT:
An image augmentation apparatus for superimposing an overlay image on a portion of a field of view of a user looking through the apparatus at a scene external to the apparatus. The apparatus includes a display screen for generating the overlay image. An optical system creates a virtual image of the overlay image which appears to the user as covering a portion of the field of view. The apparatus utilizes a transmission screen having a two-dimensional array of pixels to block portions of the image of the external scene. The pixels of the transmission screen are either set to a first state in which the pixels are transparent or a second state in which the pixels are opaque. The transmission screen is located such that a pixel set to the opaque state blocks the user from viewing a portion of the field of view of the external scene allowing the user to view only the virtual image in that portion of the field of view. This results in the virtual image appearing to occlude the external scene in that portion of the field of view.
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Hewlett--Packard Company
Hjerpe Richard A.
Marc-Coleman Marthe Y.
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