| 摘要 |
PROBLEM TO BE SOLVED: To provide a projection television capable of continuously keeping viewing without interrupting the viewing even during convergence control and to provide a convergence control method thereof. SOLUTION: The projection television, which magnifies images displayed on cathode ray tubes (CRTs) for the colors red, green, and blue using lenses and projects the magnified images onto a screen, a convergence control apparatus provided with a main microcomputer that: generates a start signal for informing of first production of either of a horizontal synchronizing signal and a vertical synchronizing signal; normally projects a video signal onto the screen; generates a convergence adjustment instruction when a video signal decoder generates the start signal; completes convergence adjustment when a convergence control unit generates a completion signal; and controls displaying the received video signal, and the convergence control apparatus adjusts the convergence while the received image signal is displayed. COPYRIGHT: (C)2003,JPO
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