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:
Apr. 10, 1990
Filed:
Dec. 27, 1988
Kwang-Seok Kim, Suwon, KR;
Samsung Electronics Co., Ltd., Swon, KR;
Abstract
In a vertical pre-control circuit for an interface of a multi-synchronization monitor that correlates the one of a computer system and adapter connected to the vertical pre-control circuit to a CRT monitor, the vertical pre-control circuit has first, second and third oscillation sections connected to an output terminal for connection to the CRT monitor, the first, second and third oscillation sections providing, when enabled, respective signals to the output terminal respectively characteristic of the one of the computer system and adapter. First and second logic sections respectively respond to positive waveforms of horizontal and vertical synchronization signals from respective terminals respectively for connection to the one of the computer system and adapter for enabling, respectively, the first and second oscillation sections. A logic controller responds to a specific frequency of the horizontal synchronization signal for overridingly disabling an enabled one of the first and second oscillation sections. A terminal for receiving, when connected to the adapter, a signal characteristic of the adapter is connected to the third oscillation section for enabling the same with the signal characteristic of the adapter. A third logic section responds to the signal characteristic of the adapter for overridingly disabling the first and second oscillation sections.