| 摘要 |
<p>PURPOSE:To use a usual frequency clock signal by transferring picture data for a time zone other than a rise time and a fall time to a control circuit so as to avoid malfunction of the control circuit due to noise. CONSTITUTION:Picture data are inputted to a picture memory from a host computer and transferred to a shift register 21 for each of area data. The transfer is implemented synchronously with a transfer clock signal DCLOCK inputted from a picture data transfer timing counter to the shift register 21. When area data are prepared, a latch strobe signal LS is inputted to a latch circuit 22, in which the area data are latched. The latched area data are inputted to one input terminal of an AND gate 24 being a component of a drive circuit 23. The transfer clock signal DCLOCK is delayed by T1, T2, T3, T4 for each area and the data are transferred for a time zone other than the rise and fall of the drive signal CL.</p> |
