Color panel identification and synchronization in a thermal printer

The invention pertains to a device capable of recognizing any color dye frame from a color ribbon for use in a thermal printer. The device comprises an LED (light emitting diode) (10) capable of producing a white light, positioned so that the ribbon (44) passes between the LED (10) and a photo-trans...

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Bibliographic Details
Main Author DOAN, TRUNG DUNG
Format Patent
LanguageEnglish
French
German
Published 23.03.2005
Edition7
Subjects
CORRECTION OF TYPOGRAPHICAL ERRORS
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:The invention pertains to a device capable of recognizing any color dye frame from a color ribbon for use in a thermal printer. The device comprises an LED (light emitting diode) (10) capable of producing a white light, positioned so that the ribbon (44) passes between the LED (10) and a photo-transistor (22). The device is adapted to collect the light generated by the LED (10) as it passes through the color dye frame (12,14,16,18,20) and generate a specific exit voltage associated with the color of the dye frame. An analog to digital converter transforms the voltage into a digital value and a micro-computer (28) processes the digital value and compares the digital value to a stored set of values associated with each color dye frame.
Bibliography:Application Number: EP20010305570