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:
Nov. 28, 2000
Filed:
Oct. 26, 1998
Nobushige Shimada, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A signal production circuit for producing a control signal used in a driving and controlling circuit of a display device externally input to the driving and controlling circuit, using an external interface signal. There is a vertical synchronization signal having a predetermined frequency and a reference clock signal in synchronization with the vertical synchronization signal. The signal production circuit includes: a first counter circuit for counting a number of reference clock signal pulses up to a value of a parameter which is preset based on a time interval of one cycle of the vertical synchronization signal and a predetermined target period. Also there is a second counter circuit for counting a number of reference clock signal pulses corresponding to the target period, the counting being performed based on the parameter and a number of reference clock signal pulses for one cycle of the vertical synchronization signal; and a signal output circuit for outputting a signal having a predetermined time period based on the number of reference clock signal pulses corresponding to the target period.