Multi-Sync Video/Data Projector
Kunio Yoneno, Yasushi Kurokawa, Kazuhiro Kaneko, Koichi Ara, Masaru Kanazawa · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1989
NEC has developed the Multi-Sync Video/Data Projector which responds to growing requirements for large screen display. The NEC Multi-Sync System is capable of handling signals from various sources such as Personal Computers,HDTV,and other video generating equipment. Therefore, this Video Projector is so designed to automatically lock to horizontal frequencies from 15kHz to 36kHz and vertical frequencies from 38Hz to 100Hz. The NEC Digital Convergence System is the culmination of numerous technologies implemented in this projector. With this combined technology the convergence can be adjust with super accuracy by using 117 (13H*9V points) independent fine tunable adjusting points on a screen. The NEC Automatic Convergence System has also been developed which adjusts convergence automatically within 5 minutes with an accuracy of 0.3 line of scanning lines.