| 摘要 |
PURPOSE:To keep the coloring density of ECD to be fixed constantly by running properly the timing of charge compensation on the occasion of the transfer of charge by means of the output signal a time counter in the driving circuit of ECD. CONSTITUTION:The time informations of counters 33-37 for month, day, hour, minute and second respectively are decoded 39 and are given to a delay circuit 40 and a driver control circuit 42. The driver control circuit 42, receiving the output signal of the delay circuit 40, discriminates whether there is any change in the content of the decoder 39 and drives an ECD panel 44 of four-digit indication through a driver 43. The output of a charge-compensation timing pulse generating circuit 201 is given to a stability discriminating circuit 200 every one hour, driving a compensation charge injecting driver 118 in the stable condition of the ordinary mode of the ECD panel 44 and injecting the compensation charge into the ECD panel 44. |
