Control circuit of recording head

Abstract

Abstract PURPOSE:To prevent recording quality from deterioration caused by unstableness of a temperature of ink near nozzle, by a method wherein a specific drive signal is applied to a discharge energy generation element of the nozzle discharging ink, and an energy drive signal within a range where no ink is discharged is applied to the discharge energy generation element of the nozzle which discharges no ink. CONSTITUTION:When a circuit receives a heat start command or a heat start signal, a heat controller 8 is operated, and operation which outputs recording data is started. Output control circuits 15-20 controlled with the heat controller 8 output recording data by a heat pulse width established to a command register 5. At that time pulse generation circuits established to the output control circuit 15-20 are also simultaneously operated, and output a pulse within a range where no ink is discharged to a discharge energy generation element in the recording head corresponding to a bit having no recording data. Thereby, a temperature of ink near a nozzle of the recording head will be able to be kept constant, and recording quality will be enabled to be restrained from deterioration.

Inventors

• 👤 Akira Nagatomo
• 👤 彰 長友

Bibliographic Details