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:
Jun. 01, 1993
Filed:
Jul. 23, 1992
Chan K Lee, Suweon, KR;
Abstract
A circuit for preventing the doming of the cathode ray tube in color TVs and instruments using high-resolution CRT's is disclosed. In the circuit a collector voltage in a voltage control circuit is gradually decreased using a thermistor with a negative temperature coefficient, and the clipping level for a video signal and a brightness level are gradually increased, thereby increasing the beam current of the CRT slowly, wherein the thermal expansion of the CRT shadow mask gradually occurs, preventing the formation of color stains and speckles on the screen and preventing the degradation of the picture.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile