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:
Apr. 28, 1998
Filed:
Jun. 04, 1997
Hiroshi Minoura, Inagi, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An object of the present invention is to realize a palette control circuit which generates inconspicuous noise using simple circuitry and without reducing processing efficiency. A palette control circuit comprises a palette 5 used for color conversion, a selector 4 that is connected to the address input of the palette and selects image memory output or address data for use in accessing the palette, a holding circuit 6 for temporarily holding the output of the palette 5, and a control circuit 7 for issuing an input select instruction to the selector 4, access control signals to the palette 5, and a data holding instruction to the holding circuit 6. For displaying normal image memory, the control circuit 7 instructs the selector 4 to select image memory output and allows the holding circuit 6 to pass palette output as it is. For accessing the contents of the palette, the control circuit 7 instructs the holding circuit 6 to hold the preceding output of the palette 5 and allows the selector 4 to select address data for use in accessing the palette.