Plasma display control system

DETAILED DESCRIPTION It is an object of the present invention to provide a plasma display control system which can display-control a plasma display using the same display timing as for the CRT display.
It is another object of the present invention to provide a plasma display control system wherein when an identical frame is displayed at the same display timing as a CRT display, even if the frame is offset by several characters in the horizontal or vertical direction on the CRT display, the entire frame can be accurately displayed on the plasma display.
In order to achieve the above objects, according to the present invention, a display control system for a plasma display having a CRT controller, which includes a plasma display with an optional connection for a CRT display.
The CRT controller drives and electrically controls the plasma display and the CRT display and comprises back porch period detection means used to display timing control of the CRT display for detecting a vertical sync signal and a back porch period following the vertical sync signal; display period setting means for setting an effective display period on the basis of the back porch period detected by the back porch period detection means; and display drive means for driving the plasma display on the basis of the display period set by the display period setting means.
According to the present invention, in a personal computer which comprises a plasma display and allows for a CRT display to be connected thereto, an arrangement of the display control can be simplified to provide economical advantages.
Display software (e.
g.
, BIOS and application software) created for the CRT display can be used for the plasma display without any modifications.