Recorders – Thermal recording
Patent
1990-08-03
1993-02-02
Fuller, Benjamin R.
Recorders
Thermal recording
B41J 238, B41J 2365
Patent
active
051841509
ABSTRACT:
The present thermal printer provides a high-speed printing table and a low-speed printing table in addition to the thermal printing head containing dot heating elements and a switch for switching the printing mode. The high-speed printing table contains pulse widths matching to the printing hysteresis of the current to the Nth previous bit and the low-speed printing table contains pulse widths matching to the printing hysteresis of the current to the Mth previous bit, the M being smaller than the N. The printer further provides a printing control circuit and a central processing unit which operate cooperatively to determine the printing hysteresis of the current to the Nth or Mth previous bit, access to the necessary address locations for the pulse widths according to the printing hysteresis, and allow the current to pass through each necessary dot heating element for the time defined by the accessed pulse width.
REFERENCES:
patent: 4364063 (1982-12-01), Anno et al.
patent: 4524368 (1985-06-01), Inui et al.
patent: 4528572 (1985-07-01), Sasaki et al.
patent: 4574293 (1986-04-01), Inui et al.
patent: 4843409 (1989-06-01), Matsuzaki
patent: 4845514 (1989-07-01), Mitsushima et al.
patent: 4876559 (1989-10-01), Nishikawa
patent: 4912485 (1990-03-01), Minowa
Conlin David G.
Fuller Benjamin R.
Le N.
O'Connell Robert F.
Sharp Kabushiki Kaisha
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