Browse Prior Art Database

Adaptable Interface for Line-Of-Dots Thermal Printer

IP.com Disclosure Number: IPCOM000047239D
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Regehr, JL: AUTHOR [+2]

Abstract

This adaptable interface method for a line-of-dots thermal printer provides ease and flexibility in attachment for many low-end copy and printing requirements. In a display screen copy application, this interface will accommodate a wide range of display timings, allowing a single thermal printer product to be attached to a variety of display products. The interface uses six data and control signals to provide the data and control for direct loading of print dot information into the shift register buffers of the printer. The buffers are loaded serially with one buffer position for each print dot. When a complete line of print dot information has been stored, the interface applies a strobe to gate the buffer contents to the printhead. Fig. 1 illustrates this interface in a display attachment.

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Adaptable Interface for Line-Of-Dots Thermal Printer

This adaptable interface method for a line-of-dots thermal printer provides ease and flexibility in attachment for many low-end copy and printing requirements. In a display screen copy application, this interface will accommodate a wide range of display timings, allowing a single thermal printer product to be attached to a variety of display products. The interface uses six data and control signals to provide the data and control for direct loading of print dot information into the shift register buffers of the printer. The buffers are loaded serially with one buffer position for each print dot. When a complete line of print dot information has been stored, the interface applies a strobe to gate the buffer contents to the printhead. Fig. 1 illustrates this interface in a display attachment. The functions of the interface signals are as follows: 1. PRINT REQUEST (printer to attachment) This signal is used by the attaching device to begin the transfer of data to the printer. This signal is conveniently generated by a pushbutton on the printer. 2. RUN MOTOR (attachment to printer) This signal is returned by the attaching device after receiving PRINT REQUEST from the printer and when the device is ready to transfer data. The motor feeds roll paper past the printhead and runs at a continuous speed as long as this signal is active. The paper feed motor in the printer is selected such that the speed will match the data transfer rate and produce a proper printout. 3. ODD DATA (attachment to printer) This signal is the serial odd dot information of the scan data to b...