| 摘要 |
A printing apparatus having a plurality of printing elements connected to a common power supply, each printing element is provided with a switching element connected to the printing element in series for controlling driving of the printing element with a voltage applied to a control terminal; a constant voltage source using the power supply as a standard, and a voltage control circuit for controlling the terminal-to-terminal potential difference of the printing element to be equal to a voltage of the constant voltage source, when the printing element is driven, and when storage, driving signals to be supplied to each printing element are controlled so that energy amount consumed by each printing element is equal. Thereby a consumed energy amount in each printing element, that is, an energy amount generated at the time of driving becomes constant regardless of external conditions and environments of the printhead, resulting in high image quality storage.
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