Configuration for ETR print head triggering

Details Configuration for ETR print head triggering Configuration for ETR print head triggering

1993-04-29

1996-05-14

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Having driving circuitry for recording means

347190, B41J 2355, B41J 236, B41J 237

Patent

active

055172296

ABSTRACT:
An ETR printing unit has electrodes and an ETR print head. A configuration for triggering the ETR print head includes a controllable energy source supplying energy for various pixels of a printed image to the electrodes of the ETR printing unit. A switching unit is provided through which the controllable energy source acts upon the electrodes temporarily connected to the energy source with a voltage or with a constant current, having a magnitude with a dependency on a temporarily different number of electrodes for supplying a larger number of electrodes with a higher voltage or a higher constant current than a lesser number would be. A microprocessor control unit for the ETR printing unit supplies the controllable energy source with a control signal corresponding to a dependency on the number of the triggered electrodes, for specifying the number of electrodes temporarily connected to the controllable energy source. A memory is connected to the microprocessor control unit.

REFERENCES:
patent: 4345845 (1982-08-01), Bohnhoff et al.
patent: 4350499 (1982-09-01), Countrymanet al.
patent: 4360819 (1982-11-01), Saito et al.
patent: 4389935 (1983-06-01), Arai
patent: 4404567 (1983-09-01), Katsuragi
patent: 4531134 (1985-07-01), Horlander
patent: 4623899 (1986-11-01), Sakakibara
patent: 5163760 (1992-11-01), Nardozzi

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