| 摘要 |
PURPOSE:To obtain a picture with excellent reproducibility, by changing the polarities of a voltage applied to a multistylus electrode according to the picture is a binary or multilevel one. CONSTITUTION:A mark given to an original 4 is read by a reading circuit 11 to discriminate between a binary picture of character information, etc., and a multilevel picture of a photograph, etc. A picture signal sent from a transmitter 1 is recorded by a multilevel electrode controlled by the recording control circuit 24 of a receiver 2. A gradation/polarity-tone switching circuit 23 applies the multistylus electrode with a negative voltage for the binary picture to obtain high picture density or with a positive voltage for the multilevel information to achieve reproduction with stable characteristics and excellent half-tones. |
