Three-dimensional display apparatus

Details Three-dimensional display apparatus Three-dimensional display apparatus

1988-04-29

1991-03-19

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

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

364522, G09G 102

Patent

active

050014706

ABSTRACT:
A three-dimensional display apparatus approximates a three-dimensional object by planes and expresses each of the planes by pixels on a plurality of scan lines, thereby to acquire a display image. A designation circuit designates a plurality of pixels on a target scan line, a depth data generator generates depth data of the designated pixels, and a luminance data generator generates luminance data thereof. Depth memory stores depth data. Luminance memory stores luminance data. A comparator reads out the depth data of designated pixels from the depth memory. Upon reception of depth data of the pixels generated from the depth data generator, the comparator compares the read depth data with the received depth data with respect to the same pixel. In accordance with a comparison result of the comparator, a controller updates the contents of the depth memory and the luminance memory to respectively have the depth data generated and the luminance data generated by the generators, with respect to that pixel whose position defined by the depth data generated from the depth data generator, is located on a visible side of a position defined by the depth data read out from the depth memory. A display unit displays the contents of the luminance memory.

REFERENCES:
patent: 3889107 (1975-06-01), Sutherland
patent: 4475104 (1984-10-01), Shen
patent: 4658247 (1987-04-01), Gharachorloo
patent: 4677576 (1987-06-01), Berlin, Jr. et al.
patent: 4730261 (1988-03-01), Smith
patent: 4737921 (1988-04-01), Goldwasser et al.
patent: 4812988 (1989-03-01), Duthuit et al.

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