| 摘要 |
<p>PURPOSE:To decrease number of control circuits by providing a readout control circuit outputting a latch signal for each output of transfer clocks of a number being the division of one scanning line picture element number by number of times of readout, a shift register having number of stages being one over the number of times of readout of the number of picture elements of one scanning line and data latches of the same number as the shift register stage number. CONSTITUTION:Even number picture information sets p2, p4 in one scanning line transferred to shift registers S1, S2 are latched in data latches L1, L2 by using a data latch signal (c). The picture signal input by the succeeding one scanning line is attained to the shift registers S1, S2. When a print instruction signal (e) is supplied from a readout control circuit 1, data outputs d1, d2 of the data latches L1, L2 are ANDed with the print instruction signal (e) by AND circuits A1, A2. Only when the print instruction signal (e) is true and the data outputs d1, d2 are black level information, driver circuits D1, D2 drive heat resistors R2, R4 energized from a power supply f2. Thus, number of control circuit groups is halved than those of a convention recorder.</p> |
