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:
Aug. 01, 2000
Filed:
Feb. 05, 1999
Takao Nakano, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An MPU changes the phase of a sampling clock signal by one step for each frame until the change in the phase reaches 360 degrees. An image quality detector portion sequentially receives a digital image signal to detect a maximum one of data about the absolute value of a difference between adjacent pixels in one frame as an image quality judgement data signal. The MPU detects a maximum one of all image quality judgement data to determine a phase at that time as an optimum phase of the sampling clock signal. The MPU then periodically checks image quality on a screen, and makes a real-time correction to the phase of the sampling clock signal if a temperature drift or the like occurs.