The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 1985
Filed:
Feb. 10, 1983
Hidemasa Todoh, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A thermal recording head drive device in which a uniform recording density is provided independent of temperature changes in the device. An analog shift register receives an analog input signal having an amplitude which varies according to the densities of picture elements to be recorded. The analog signal is shifted into the register until sufficient data is stored to provide parallel outputs corresponding to an entire line of picture elements to be recorded. Current control circuits are connected in series between respective outputs of the shift register and heat generating resistance elements of the recording head. A common connection terminal of the series circuits of the current control circuits and heat generating resistance elements is connected through a voltage control circuit to a power supply terminal. The internal impedance of the voltage control circuit is set in accordance with at least one detected temperature in or around the recording head which affects the recording density such as the substrate temperature of the head.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile