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. 27, 1999
Filed:
Feb. 14, 1996
Hiroshi Nishiyama, Noda, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
The present invention provides an image display apparatus equipped with a common terminal section 10 to which a single-density signal and a double-density signal each having different horizontal scanning frequencies to each other are commonly connected. The single-density and double-density signals are selectively inputted to the single-density signal processing circuit 5 or the double-density signal processing circuit 6 by a switching operation of a switch 11. A synch-signal separation circuit 13 separates a synchronous signal carrying the horizontal scanning frequency from the signal inputted to the common terminal section 10. An fV-conversion circuit 14 converts a horizontal scanning frequency of the synchronous signal into a voltage. A frequency discrimination circuit 15 detects the horizontal scanning frequency and memorize it in a look-up table of a memory device 16. A control circuit 17 controls switching operations of the switches 7, 11 on the basis of the horizontal scanning frequencies of the signals memorized in the look-up table of the memory device 16.