| 摘要 |
PURPOSE:To binary code signals with priority given to the picture accuracy by fixing the charge store time of a CCD at the minimum value and therefore controlling said charge store time by the light quantity of a light source in a halftone read mode where a binary coded signal is easily affected by the reduction of the light quantity of the light source and the reduction of the CCD output. CONSTITUTION:The reading part of a facsimile equipment is provided with a data control circuit 1, a charge store time variable/fixed mode switching circuit 2, a charge store time generating circuit 3, a CCD sensor control circuit 4, a CCD sensor 5, a halftone circuit 6 and a binary coding circuit 7. The circuit 1 decodes the control signal, and the circuit 2 sets variably the charge store time in a halftone reading mode. While the charge store time is fixed in a white/ black binary reading mode. The information on the charge store time is given to the circuit 4 from the circuit 3. Based on this information, the video signal underwent the photoelectric conversion through the sensor 5 is binary coded by the circuit 7 and delivered. While the binary coded signal is delivered from the circuit 7 under the control of the circuit 6 in a halftone reading mode. |
