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. 10, 1987
Filed:
Oct. 01, 1986
Shinichi Kato, Tokyo, JP;
Masahiko Sasaki, Tokyo, JP;
Tadashi Kato, Tokyo, JP;
Masahide Kanno, Tokyo, JP;
Yutaka Takahashi, Tokyo, JP;
Katsuyuki Saito, Tokyo, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
Disclosed is a control circuit which is connected to a video endoscope, having a CCD in the distal end thereof. The control circuit supplies driving clock pulses to the CCD, and converts a picture element signal pulses from the CCD into a continuous image signal, by clamping, or sampling and holding, the signal pulses. The converted signals are further subjected to video processing. A scope discrimination resistor is contained in the endoscope, in the vicinity of a connector thereof, which connects the endoscope and the control circuit. The resistance value of the resistor depends on the length of the endoscope. When the endoscope is connected to the control circuit, the resistor is connected in series with a constantcurrent source in a scope discrimination circuit. The discrimination circuit discriminates the scope length by detecting the resistance value of the resistor as a terminal voltage. The waveform of the driving clock pulses for the CCD is modified in accordance with the result of the discrimination, and the timing for clamping, or sampling and holding, the picture-element signal pulses from the CCD (10), is determined by the discrimination result.