The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 2004
Filed:
Aug. 20, 2002
Katsunori Suzuki, Hitachi, JP;
Ryo Fujita, Hitachi, JP;
Kazuyoshi Koga, Hitachinaka, JP;
Yuichi Abe, Hitachi, JP;
Mitsuru Soga, Kitakanbara-gun, JP;
Kazuhisa Takami, Hitachi, JP;
Koyo Katsura, Hitachiohta, JP;
Hideki Fujii, Hitachinaka, JP;
Kazunori Oniki, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A graphics processor comprises: a light source table holding light source data; a conversion unit for converting the light source data to be set in the light source table from a float type (single-precision floating point real number type) into an int type (integer type); an inner product calculation unit for calculating the inner products of normal directions, light source directions and sight line directions at the vertices based on the light source data; and a color calculation unit for performing light source computations based on the calculated inner products to determine the colors of the vertices.