| 摘要 |
PURPOSE:To reduce the quantity of parts of a circuit, and to display correctly each line on a screen to the specified position at fixed intervals, by storing the data of a deflection signal as a digital signal in a memory, and outputting the contents of the memory according to the deflecting position of apply D/A conversion. CONSTITUTION:A microcomputer having a CPU52, the 1st memory 51, a control logic 55, etc., is provided at the position of picture image display, and it is connected to a vertical/horizontal deflection circuit 56 with an address bus AB, a data bus DB and control bus CB. The 2nd and 3rd memories 62 and 63 of the circuit 56 store the data to produce vertical and horizontal deflection signals as digital signals. The data of the memories 62 and 63 are read out to the 1st- 4th converters 64-67 by a DMA logic 57 which controls a logic 55. The digital signal is applied with the D/A conversion by the converters 64-67, then vertical and horizontal signals are produced respectively to output, and thus each line is correctly displayed on the screen. |
