| 摘要 |
A method and structure for allowing a liquid crystal device (LCD) display to be used in a computer running a variety of programs which may provide screen images of a variety of graphic modes, and which center the screen image in the LCD display without operator intervention or adjustment. The video mode of the video signal provided by the video driver is automatically detected without the need for specific instructions from the video driver. The active portion of the display signal is determined and appropriate offsets automatically provided in order to send a video signal to the LCD display having the proper horizontal and vertical frequencies, and a screen image which is centered on the LCD display. The optimum sampling phase is automatically determined by making a number of measurements at the different sampling phases and detecting which sampling phase provides the greatest contrast value, indicating that is the optimum sampling base to be used.
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