Effects of indented interframe cross talk in charge-coupled device detection of discrete displays

摘要

By considering CCD detection as a spatiotemporal sampling process and considering electronically addressed liquid-crystal display’s (LCD’s)and cathode ray tube (CRT) display’s as discrete displays, we investigate the frame-grabbing process for CCD detection of discrete displays by using CRT-CCD and LCD-CCD models. Because of the nature of the timing for pixel addressing in the CRT, line addressing in the LCD, and frame transfer in the CCD, it is found that CCD frames suffer from indented interframe cross talk of the displayed input frames. This indented cross talk occurs regardless of whether a synchronizing signal is utilized. Cross talk typically takes place between two or three input frames. Indented interframe cross talk does not affect CCD detection for frame refreshing. However, cross talk increases as the interframe difference between successive displayed input frames increases.