Patent ID: 7581821
Filing Date: 2009-09-01
Classification: B41J

Abstract:
1. A rectangular head substrate comprising: an ink supply port which has a long hole shape elongated in a first direction; a plurality of printing elements arrayed along the first direction on both sides of said ink supply port; a plurality of first driving elements, arrayed along the first direction at positions spaced apart further away from said ink supply port than said plurality of printing elements, for driving said plurality of printing elements; a plurality of fuse ROMs for storing information, arranged at both ends of extensions from said ink supply port in the first direction; a plurality of second driving elements for driving said plurality of fuse ROMs; shared signal lines used for driving said plurality of first driving elements and said plurality of second driving elements; a power supply circuit for supplying power to said plurality of first driving elements and said plurality of second driving elements; a serial-parallel conversion circuit, connected to at least part of said shared signal lines, arranged at one end of the extensions in the first direction; a decoder, connected to at least part of said shared signal lines, arranged at the other end of the extensions in the first direction; and input pads, connected to either said serial-parallel conversion circuit or said power supply circuit, for receiving signals inputted from outside of said head substrate, wherein said first driving elements and said second driving elements are arrayed along the first direction on both sides of the extensions from said ink supply port, forming continuous arrays. said plurality of the ROMS are arranged at an intermediate area between said ink supply port and either said serial-parallel conversion circuit or said decoder, said power supply circuit is arranged at an area adjacent to said decoder, and said input pads are arranged at both of shorter sides of said rectangular head substrate.