Patent ID: 6502915
Filing Date: 2003-01-07
Classification: B41J

Abstract:
An inkjet print cartridge, comprising:a substrate having a plurality of ink ejection chambers, each of said plurality of ink ejection chambers having an ink ejection element formed on a first surface of said substrate; an ink channel connecting at one end to an inlet passage connected to one of said ink ejection chambers for refilling said one of said ink ejection chambers with ink; a group of said ink ejection chambers in adjacent relationship forming a primitive in which a maximum of only one of said ink ejection chambers in said primitive is activated at a time and said primitive is one of a plurality of primitives on said substrate; first circuit means on said substrate coupled to said ink ejection elements; second circuit means on said print cartridge coupled to said first circuit means for transmitting ejection signals to said ink ejection elements at a frequency greater than 15 kHz; wherein said first circuit means applying primitive select signals to select one or more of said primitives and applying address line select signals to enable devices associated with said ink ejection elements in one or more selected primitives such that a maximum of one of said ink ejection chambers in each of said selected primitive is energized at a time, causing a plurality of ink drops to be ejected from said one of said ink ejection chambers onto a media surface at a single pixel location in a single pass of said print cartridge over said media surface, and wherein said inlet passage for each ejection chamber allows high frequency refill of said ink ejection chamber at approximately the same frequency that said ink drops are ejected.