Array driving circuit with control voltage adjusted at both ends, and array head using same
AssigneeOki Data Corporation
InventorAkira Nagumo
Life of this patent
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Abstract
A driving circuit includes an array of driving elements that selectively supply current from a power supply to an array of driven elements at a rate responsive to the difference between a control voltage and the power supply voltage. The control voltage is furnished to the driving elements through a conductive member that extends parallel to the array of driving elements. The driving circuit includes means for adjusting the control voltage independently at each end of the conductive member, to reduce variations in the current supplied by different driving elements.
Claims16
A driving circuit receiving a power supply, generating a control voltage, and driving an array of driven elements, comprising:
- an array of driving elements receiving the power supply and the control voltage and selectively supplying driving current to the driven elements, the driving current having a current value responsive to a difference between the control voltage and a voltage of the received power supply, the array of driving elements having a first end and a second end;
- a conductive member extending parallel to the array of driving elements, having a first end adjacent the first end of the array of driving elements, a center, and a second end adjacent the second end of the array of driving elements, for supplying the control voltage to the driving elements;
- and
- means for adjusting the control voltage independently at the first end and the second end of the conductive member.
Dependencies are inferred from the claim text.