A FAST (VERTICAL) SCAN APPARATUS FOR TRANSPOSED SCAN DISPLAY SYSTEMS

摘要

The implementation of a vertical scan system with a single high frequency vertical scan rate will permit one common basic chassis design to be utilized worldwide. In addition, such implementation will enable the automatic (and/or manual) adaptation of the viewer's display device in response to the incoming video signal rate. The high frequency scan rate for transposed scan display system can allow one circuit to accommodate various types of input signals (individually and not simultaneously). For example, the high frequency scan rate would allow the same circuit to be used for an input source having a signal source rate of 50Hz, 60Hz, or may even include cinema modes at 72Hz or 75Hz. By operating the high frequency (vertical) scan rate (e.g., in a range of 41.5 kHz - 52 kHz), the number of scan lines can be changed to accommodate the potential variety of input signals.