| 摘要 |
A printing apparatus comprises: a printhead, which has a heater board on which heaters are disposed, configured to discharge ink; a transfer unit configured to transfer a discharge image signal to the printhead; and a power supply circuit configured to generate power for heating the heaters. Here, the printhead includes a supply circuit which, based upon the discharge image signal, supplies the heater board with power generated by the power supply circuit. |
| 主权项 |
1. A printing apparatus comprising:
a printhead configured to discharge ink and the printhead including a heater board on which heaters corresponding to nozzles for discharging ink and a driving circuit for driving each of the heaters are disposed; a receiving unit configured to receive image data; a generating unit configured to generate discharge image data for printing an image and control data for controlling the heaters, based on the received image data; a transfer unit configured to transfer an image signal including the generated discharge image data and the generated control data to the printhead, the printhead comprising a discharge control unit configured to control discharge of ink from the nozzles of the printhead, by turning ON heaters based on discharge image data and control data obtained from the image signal transferred by the transfer unit; a transfer timing control circuit configured to generate a transfer timing signal indicating a transfer timing of the image signal by the transfer unit; a heater board power supply circuit configured to supply power to the heater board; and a power supply control unit configured to control power supply of the heater board power supply circuit to the heater board by controlling whether or not supplying a voltage to the heater board so as to activate the heater board, based on whether the transferred image signal satisfies a predetermined condition, wherein a plurality of periods which are divided by the transfer timing signal include a first period, a second period subsequent to the first period, and a third period subsequent to the second period, in the first period, the transfer unit transfers the image signal, in the second period, the discharge control unit obtains discharge image data and control data from the image signal transferred by the transfer unit in the first period, in the third period, the power supply control unit controls the power supply of the heater board power supply circuit to the heater board based on whether the transferred image signal satisfies the predetermined condition, and after the third period, the discharge control unit controls discharge of ink from the nozzles, based on discharge image data and control data obtained from the transferred image signal. |
