Techniques for increasing ink-jet pen identification information in an interconnect limited environment
First Claim
Patent Images
1. An ink-jet print cartridge, including:
- a printhead with one or more nozzle arrays fabricated on a printhead substrate with printhead firing resistors;
a printhead data encoding circuit, comprising;
a sense line;
a plurality of addressable circuits connected between the sense line and a common reference, each circuit comprising a select device, an address line connected to the select device, and a parallel connection of a plurality of link elements and corresponding resistive elements, whereby information is encoded by connecting or not connecting the link elements;
interconnect circuitry coupled to the printhead and to the data encoding circuit to provide printhead drive signals and to interrogate the data encoding circuit.
2 Assignments
0 Petitions
Accused Products
Abstract
Multiple links with series resistors are connected to address select transistors and a sense line in a printhead encoding circuit. This arrangement provides an increased number of possible states, thereby increasing the amount of information which can be encoded for such purposes as pen identification.
65 Citations
9 Claims
-
1. An ink-jet print cartridge, including:
-
a printhead with one or more nozzle arrays fabricated on a printhead substrate with printhead firing resistors;
a printhead data encoding circuit, comprising;
a sense line;
a plurality of addressable circuits connected between the sense line and a common reference, each circuit comprising a select device, an address line connected to the select device, and a parallel connection of a plurality of link elements and corresponding resistive elements, whereby information is encoded by connecting or not connecting the link elements;
interconnect circuitry coupled to the printhead and to the data encoding circuit to provide printhead drive signals and to interrogate the data encoding circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification