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:
Oct. 02, 2001
Filed:
Jun. 11, 1997
Hisao Okada, Ikoma-gun, JP;
Sunao Etoh, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The driving circuit of this invention for a display device displaying a plurality of gray levels in accordance with digital data including a first bit portion and a second bit portion, includes: a voltage dividing circuit for generating a plurality of interpolation voltages between a plurality of gray level voltages supplied externally by dividing the plurality of gray level voltages; a first selection circuit for selecting a first voltage and a second voltage which is different from the first voltage among the plurality of gray level voltages and the plurality of interpolation voltages based on the first bit portion of the digital data; a second selection circuit for selecting one of a plurality of oscillating signals having different duty ratios based on the second bit portion of the digital data; and an output circuit for outputting an oscillating voltage which oscillates between the first voltage and the second voltage selected by the first selection circuit at a duty ratio of the oscillating signal selected by the second selection circuit.