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:
Dec. 25, 1979
Filed:
Nov. 25, 1977
H George Pires, Parlin, NJ (US);
Crosspoint Latch Corp., Summit, NJ (US);
Abstract
For phase matching a first and second television signal, both signals are applied to the inputs of an electronic switching circuit, whose output is connected to a standard television monitor. The switching circuit applies the video portion of the first television signal to the monitor. For matching the phase of the synchronizing signals, the synchronizing signals from the first television signal are applied to the monitor for the first half of each field, those from the second television signal during the second half of each field. A visually detectable shift occurs between the top and bottom half of the picture displayed on the monitor if the synchronizing signals of the second television signal are not in phase with those of the first television signal. Similarly for color television signals, the video and synchronizing portions of the first television signal are applied to the monitor throughout each field while the color burst from the first television signal is applied for the first half of each field and that from the second television signal for the second half of each field. If the two color burst are not exactly in phase, the hue of the pictured display on the monitor will differ between the top and bottom half. Manual adjustment of the phase of the synchronizing signals or the color burst to eliminate the shift or the difference in hue, respectively, will cause the second television signal to be phased-matched with the first.