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:
Jul. 21, 1992
Filed:
Sep. 21, 1990
Felix Ams, Kampfelbach, DE;
Roland Schafer, Bretten-Durrenbuchig, DE;
Richard Wolf GmbH, Knittlingen, DE;
Abstract
An apparatus for automatically regulating a light source for providing light for illuminating an object viewed by means of an endoscope equipped with a video camera, there is provided a signal processing device having a circuit for defining the density value of the video signal of each line of the camera image, by means of which circuit, the video signal emitted is passed to a comparator which compares it with a brightness threshold voltage which can be preset. A control signal for regulating the light source is determined by counting the image lines having a brightness exceeding the threshold voltage and linking the resultant count to a mathematical function. The actual value obtained from the video signal is independent of the area of the bright parts of the image and is, therefore, independent of the diameter of the image circle of the endoscope.