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. 13, 1984
Filed:
May. 14, 1982
Lawrence E Alston, Chelmsford, MA (US);
David S Haroutunian, Chelsea, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
A high ratio multilaced raster scan system for obscuring the blank spaces between the raster lines on a CRT when making a photograph or hard copy from the screen of the CRT utilizes a selectively varied DC bias voltage to vertically offset in a select sequence succeeding pulses in the vertical ramp pulse train signal which controls the vertical sweep position of the electron beam of the CRT to thereby provide a corresponding sequence of parallel interlaced raster lines vertically offset with respect to each other. The system is calibrated in a simple manner by utilizing an alternating DC bias voltage to vertically offset alternate pulses in the vertical ramp pulse train signal and thereby enable the user to calibrate the average DC level of the selectively varied DC bias voltage by aligning the raster lines of the first and second fields.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile