Print head modulator

Details Print head modulator Print head modulator

1992-06-03

1994-06-14

Fuller, Benjamin R.

Recorders

Thermal recording

346 11, B41J 2355

Patent

active

053214277

ABSTRACT:
A thermal print head modulator (300) for generating modulation signals for printing a halftone dot (145) whose size corresponds to a data value (205) represented by a plurality of bits. The modulator (300) includes a programmable look-up table (235) containing modulation values (236) that are selectable by control circuitry (245). By storing modulation values (236) in a pre-determined pattern and selecting each value sequentially for comparison with each data value (205), the modulator (300) is compatible with both pulse count modulation and partial pulse modulation having any number of designated partial pulse bits in the data value (205).

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patent: 4912562 (1990-03-01), Fenster et al.
patent: 4951152 (1990-08-01), Suzuki et al.
patent: 4980702 (1990-12-01), Kneezel et al.
patent: 4994822 (1991-02-01), Caine

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