Patent ID: 6290334
Filing Date: 2001-09-18
Classification: B41J

Abstract:
A substrate, comprising:a plurality of linearly arranged recording elements in the form of liquid ejection energy generating means which are integrally built into said substrate;a plurality of electrical leads, electrically connected to said recording elements and connected in a circuit for supplying electric driving current to said recording elements;said circuit including a first common lead electrically connected to each of said plurality of electrical leads to supply a driving voltage to said recording elements;an electrical contact for external electrical connection for reception of image signals used for driving said recording elements;a plurality of selector elements integrally built into said substrate and electrically connected to said recording elements for selectively controlling the application of driving current to said recording elements;a second common lead electrically connected to each of said plurality of selector elements in said circuit to electrically ground them;a logic circuit, integrally built into said substrate, and having a circuit connected to said contact for receiving said image signals and for converting said image signals which are serially supplied to said electrical contact into parallel signals and having a circuit for holding the parallel signals and connected to supply them to the selector elements;wherein said recording elements, said selector elements, and said logic circuit are disposed in the order stated from an end of said substrate, said recording elements being disposed at positions beyond said first and second common leads toward said end of said substrate, and said liquid ejection energy generating means and said selector elements being disposed in one-to-one correspondence.