Printhead, head cartridge having said printhead, printing apparatus using said printhead and printhead element substrate

摘要

A printhead has a plurality of printing elements and a drive circuit for driving the printing elements are aligned in a predetermined direction on an element board. The printhead is provided with a Schmitt trigger (508) having hysteresis properties that give different threshold values to the rising and falling edges of a wave form of a logic signal (HE, LT, CLK, DATA) input into the drive circuit. The Schmitt trigger is provided with means (105, 801, 901, 100', 101') for adjusting the length of the delay at the rising and falling edges of the input wave form signal, so that the speed of data transmission to the printhead can be increased even as the supply voltage is lowered.