Apparatus and method for producing a three-dimensional display on a video display device
First Claim
1. Apparatus for producing a three-dimensional display on a video display device of the type which displays images in frames composed of a plurality of scan lines, the apparatus comprising element generator means for generating signals corresponding to pairs of elements to be displayed on the video display device, means for applying said signals to the video display device such that the elements constituting an element pair are displayed on the same scan line of the video device, a video signal source for producing a video signal defining a predetermined image, and means responsive to the video signal for producing disparity between the elements of the pairs of elements displayed during selected portions of the predetermined image such that said selected portions appear to be at a different distance from a viewer than non-selected portions of of the predetermined image.
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Accused Products
Abstract
Dynamic random element stereograms are produced on a television receiver or video monitor by an interface circuit that generates first and second binary sequences which are applied to the display so as to display a plurality of pairs of elements, and relative delays are introduced between the two binary sequences during selected portions of an image defined by a video signal so that the disparity between elements of those pairs displayed during the selected portions is different from the disparity between elements displayed during non-selected portions, thereby causing the selected portions to appear to be at a different depth from the non-selected portions.
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Citations
34 Claims
- 1. Apparatus for producing a three-dimensional display on a video display device of the type which displays images in frames composed of a plurality of scan lines, the apparatus comprising element generator means for generating signals corresponding to pairs of elements to be displayed on the video display device, means for applying said signals to the video display device such that the elements constituting an element pair are displayed on the same scan line of the video device, a video signal source for producing a video signal defining a predetermined image, and means responsive to the video signal for producing disparity between the elements of the pairs of elements displayed during selected portions of the predetermined image such that said selected portions appear to be at a different distance from a viewer than non-selected portions of of the predetermined image.
- 26. Apparatus for producing a three-dimensional random element stereogram display on a video display device of the type which displays images in frames composed of a plurality of scan lines, the apparatus comprising pseudorandom sequence generator means for generating a pseudorandom binary sequence, fixed delay means receiving the binary sequence for delaying the binary sequence by a predetermined amount, variable delay means receiving the binary sequence for delaying the binary sequence by a variable amount relative to said predetermined amount, means receiving the binary sequences from said fixed and variable delay means and for applying said binary sequences to the video display device so as to display randomly thereon pairs of elements, one element of each pair being produced by the binary signal from the fixed delay means and the other element of the pair being produced by the binary sequence from the variable delay means, said one element and said other element of the pair being displayed on the same scan line of the video display device, and means for controlling the variable delay means so as to vary the delay between elements of pairs displayed during selected portions of the display relative to the elements of pairs displayed during non-selected portions so as to cause the selected portions of the display to appear to be at a different distance from a viewer than said non-selected portions.
- 30. A method of producing a three-dimensional display on a video display device of the type which displays images in frames composed of a plurality of scan lines, the method comprising generating first and second binary sequences, the sequences having first and second logic states, applying said first and second sequences to the video display device to display pairs of elements, each sequence producing one element of a pair and the elements of a pair being displayed on the same scan line, generating a video signal defining a predetermined image, and delaying said first and second binary sequences relative to one another in accordance with said video signal such that during selected portions of the predetermined image a first element of each pair is delayed with respect to a second element of the pair and such that during non-selected portions of the predetermined image the second element is delayed with respect to the first element.
Specification