Printing element drive device having separately operating shift

Details Printing element drive device having separately operating shift Printing element drive device having separately operating shift

1993-07-01

1996-01-30

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Having driving circuitry for recording means

347180, 347182, B41J 2355

Patent

active

054884039

ABSTRACT:
A plurality (n) of heating elements are driven by respective drive elements in accordance with printing data stored in first and second shift registers each having at least n/2 memory cells. Common bit-serial printing data is input to the first and second shift registers. In a first period, new printing data of n/2 bits is stored into the first shift register by application of a first clock signal and printing data already stored in the second shift register is provided to the associated drive elements. In a second period, new printing data of n/2 bits is stored into the second register by application of a second clock signal and printing data already stored in the first shift register is provided to the associated drive elements. The first and second shift registers may include an equal number of dummy memory cells for storing dummy printing data, in which case the part of the drive elements associated with the dummy memory cells are not connected to any printing elements.

REFERENCES:
patent: 4492482 (1985-01-01), Eguchi et al.
patent: 4575732 (1986-03-01), Kitaoka
patent: 4609927 (1986-09-01), Yoshida
patent: 4689694 (1987-08-01), Yoshida

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