High thermal efficiency ink jet printhead

A high-speed printing system, comprising:

• a printhead having a substrate;
• and
• a high-resistance resistor including a thin-film resistor structure disposed on the substrate having a low parasitic power loss so that a minimum energy is needed to eject an ink drop, the high-resistance resistor comprising:
• a plurality of segments connected by at least one of:
• (a) a coupling device;
• (b) a conducting ink;
• a current control device.

An ink jet printing apparatus, comprising:

• an ink jet printhead having a substrate;
• and
• circuitry disposed on the substrate, the circuitry comprising a plurality of primitives, each primitive containing plural firing resistors;
• the circuitry including demultiplexing circuitry disposed on the substrate and coupled to the plurality of primitives, the demultiplexing circuitry delivering firing pulses to the resistors such that only one resistor is activated at a time within a primitive, wherein the circuitry has a lower parasitic power loss such that less than 15 percent of the power input to the substrate is a parasitic power loss dissipated outside of the firing resistors.