Patent ID: 6871933
Filing Date: 2005-03-29
Classification: B41J

Abstract:
1. An ink jet print head identification circuit, suitable for using in an ink jet printer that comprises a reset signal line, at least one clock signal line, and an identification code signal line, for identifying a type of the ink jet print head, comprising: a counter, coupled to the reset signal line and at least one clock signal line, used to reset the counter when a reset signal is received from the reset signal line, and used to count a count value of the counter to a next value when a corresponding clock signal is received from the at least one clock signal line, so as to output the count value from a plurality of output terminals of the counter; a logic unit, comprising a plurality of input terminals and an output terminal, wherein the output terminal of the logic unit is coupled to the identification code signal line, so as to output an identification code that represents the type of the ink jet print head; and a programming unit, coupled to the output terminals of the counter and the input terminals of the logic unit, used to program the corresponding connection between each output terminal of the counter and each input terminal of the logic unit.