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:
Sep. 05, 2000
Filed:
Jun. 16, 1998
Hiroyuki Ikegami, San Diego, CA (US);
Sony Corporation of Japan, Tokyo, JP;
Sony Electronics, Inc., Park Ridge, NJ (US);
Abstract
A display device using a video signal counter system in its automatic positioning and centering circuit. The display device receives a video signal (e.g., from a host computer) including red, green, blue (RGB) color signals and synchronization signals. The present invention advantageously utilizes a video signal counter circuit which is located proximate to, and on the same integrated circuit PC board as, the video receiver circuit of the display device to increase the accuracy of automatic centering and sizing computations. The video signal counter circuit compares horizontal and vertical synchronization signals to the start of the picture edge as determined by the RGB signals. The video signal counter circuit communicates over a transmission line (e.g., serial line) to a processor unit located on another integrated circuit PC board. The processor unit uses the signals generated by the video signal counter circuit to perform automatic sizing and centering computations and generates, as output, vertical and horizontal sizing and vertical and horizontal centering signals. These signals are supplied to a yoke controller/driver circuit which drives the deflection circuitry of a cathode ray tube (CRT) type display unit. By positioning the video signal counter circuit on the same PC board as the receiver unit, signal jitter and EMI noise problems are reduced. The transmission line between the video signal counter circuit and the microprocessor can be shielded thereby further reducing EMI noise. Noise is reduced again by positioning the microprocessor on the same PC board as the yoke driver circuit.