Patent ID: 8708443
Filing Date: 2014-04-29
Classification: B41J

Abstract:
1. An element substrate comprising: a plurality of printing elements; a logic circuit configured to control driving of the printing elements; a plurality of input signal terminals configured to respectively input a plurality of signals; an input power terminal configured to input a voltage to be applied to the logic circuit; a logical operation circuit configured to perform a logical operation of the plurality of signals and output result of the logical operation; a switch configured to, wherein a first terminal of the switch connecting to the input power terminal, a second terminal of the switch connecting to a ground, and a third terminal of the switch receiving the result of the logical operation, generate a status signal according to the result of the logical operation; and an output signal terminal configured to output the status signal, wherein the switch changes a level of the status signal when the plurality of signals are not input and the voltage is applied via the input power terminal, and the switch changes the level of the status signal in accordance with the result of the logical operation in a case that the voltage is being applied to the logic circuit via the input terminal.