| 摘要 |
<p>PURPOSE:To realize a high-reliability, inexpensive thermal recording device by providing an enable distributing circuit which inputs one serial enable signal and distributes and outputs the enable signal. CONSTITUTION:A image signal 143 is transferred into a shift register 101 with a clock signal 144. When a one-line image signal 143 is transferred into the shift register 101, the image signal in the shift register 101 is latched in a latch 102 with latch pulses. Further, the latch pulses 142 initialize the enable signal distributing circuit 145. Then the enable signal distributing circuit 145 which inputs the serial enable signal 141 outputs four enable signals 1411-1414. The 1st enable signal 1411 is ANDed (negative logic) with the image signal by NORs 103-105 and driving transistors (TR) 115-117 are turned on according to the image signal to power on heating elements 127-129. Enable signals 1412-1414 are the same.</p> |
