Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1995-12-28
1999-01-12
Le, N.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
347240, B41J 247, B41J 2435
Patent
active
058596577
ABSTRACT:
A non-impact printhead having a plurality of driver IC chips and and a plurality of recording elements such as LEDs. Each driver IC chip includes a plurality of current-carrying channels that are operative for carrying current to respective recording elements on the printhead and a control for controlling operation of the driver. The control includes a circuit that provides a test circuit interface which includes (a) a test access port for input of update command signals and clock inputs to the test circuit; (b) a test data input terminal for inputting test data and control data into the chip; (c) a plurality of registers connected to the test data input terminal with at least one of the registers storing control data for controlling operation of the driver; (d) a test data output terminal for outputting test data and control data from the chip to an adjacent chip; and (e) a selector connected to the registers and the test data output terminal for selecting test and control data for output from the test data output terminal.
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Donahue Michael John
Fleming Paul John
Fox Tracy
Kelly Edward Michael
Mattern Michael William
Eastman Kodak Company
Le N.
Nguyen Thinh
Rushefsky Norman
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