Control device for thermal printer head and printer using the same
AssigneeShinko Electric Co., Ltd.
InventorsTakanobu Mimura, Toshiki Nakamura
Life of this patent
Estimating the term…
Abstract
A control device for thermal printing head and a printer having the thermal printing head are presented. The control device had a plurality of heating elements to correspond to a plurality of imprinting dots and a plurality of 1-bit registers for holding bit signals to drive each heating element, and includes dividing means for dividing gradation data of a multi-level gradation to express tones of imprinted dots into a plurality of weighted values according to gradation values; and pulse signal generation means for generating pulses having predetermined pulse widths according to respective weighting of gradation values and generating a number of pulses or pulse widths in accordance with a plurality of values of divided gradation data.
Claims9
A control device for controlling a thermal printing head having a plurality of heating elements to correspond to a plurality of imprinting dots and a plurality of registers for holding individual 1-bit signals to drive respective heating elements, comprising:
- dividing means for dividing data of multi-level gradation produced by each imprinting dot into a plurality of different weighted values according to gradation values;
- and
- pulse signal generation means for generating a plurality of pulse signals having pre-determined pulse widths according to weighting of respective gradation values to be expressed so as to produce a number of pulses or pulse widths in accordance with a plurality of values of divided gradation data.
A control device for controlling a thermal printing head having a plurality of heating elements to correspond to a plurality of imprinting dots and a plurality of registers for holding individual 1-bit signals to drive respective heating elements, comprising:
- dividing means for dividing data of multi-level gradation produced by each imprinting dot into a plurality of different weighted values according to gradation values;
- and
- pulse signal generation means for generating a plurality of pulse signals having pre-determined pulse widths according to weighting of respective gradation values to be expressed so as to produce a number of pulses or pulse widths in accordance with a plurality of values of divided gradation data of multi-level gradation, wherein
- pulse-on duration and pulse-off duration for impressing pulse signals during the pre-determined pulse widths are adjusted so that the temperature rise of the thermal printing head for one gradation level will be a constant value.
Dependencies are inferred from the claim text.