Method and apparatus for recording through ejection of recording medium liquid by using thermal energy

Abstract

Abstract PURPOSE:To record through simple control of the diameter of liquid drips and to enable to reproduce and record the tonal image, by causing state change of the recording medium liquid through selection of the level of heating energy in response to the level of input signals afforded from the outside. CONSTITUTION:Outputs from comparators 221-225 are afforded to a gate selecting circuit 26, which produces in turn a gate signal corresponding to the level of each input signal. On the other hand, if an input signal of a level higher than, for instance, a lowermost reference level is given, an output signal is produced from comparator 221 and afforded to pulse driving circuit 27 as gate signal, and an output pulse having a required width and amplitude is given from switching circuit 281. Switching circuits 281-285 are energized only at their gates selected by the gate selecting circuit 26, for transmitting output from the pulse driving circuit 27 to one of output terminals 291-295. Here, in response to the level of input signal, a heat producing element having a highest resistance is driven in the region of low input level, whereas a heat producing element having a lowest resistance is driven in the region of highest input level.

Inventors

• 👤 Koji Sato
• 👤 Yasushi Takatori
• 👤 Toshitami Hara
• 👤 Yoshiaki Shirato

Bibliographic Details