| 摘要 |
A circuit and method for displaying both interlaced and non-interlaced video information on a flat panel display. The flat panel display is a field emission display (FED) screen. Within the FED screen, a matrix of rows and columns is provided and emitters are situated within each row-column intersection. Rows are activated (e.g., enabled) sequentially and separate gray scale information (voltages) is presented to the columns. When the proper voltage is applied across the cathode and anode of the emitters, they release electrons toward a phosphor spot, e.g., red, green, blue, causing an illumination point. The present invention includes circuitry for enabling the rows in one of two different modes. In a first mode, the rows are enabled sequentially with each pulse width of the sufficient duration ("long pulse") to perceptively energize the row for displaying image data thereon. In this mode, the rows are enabled for the display of non-interlaced video information. In the second mode, an interlaced mode, every other row driving pulse has a width that is insufficient ("short pulse") to energize the row such that it does not perceptively display of information. By alternating pulse widths in this manner, an interlaced display mode is allowed wherein every other row is energized. Interlaced video can therefore be displayed using the same row enable and driver circuitry that is used for non-interlaced display. By providing n short pulses, per long pulse, every nth row can be energized for realizing alternate interlaced display modes. |
