TH21564B - The print head of the printer. - Google Patents

Abstract

DC60 (14/10/40) Correction data adjustment for the corresponding LEDs at the end of print head production is performed by temporarily transferring the correction data from the production device directly to the LED driver, i.e., without storing it in the 10c storage circuit in the print head once beforehand. The light output from the LEDs is then measured, and the correction data is adjusted and repeated until the correction data is optimized. The optimized correction data, as well as the blinking frequency time data determined from the measured average power, are written to the 10c storage circuit. During printer use, the data stored in the 10c storage circuit is used for data correction and blinking frequency determination. Correction data adjustment for the corresponding LEDs at the end of print head production is performed by temporarily transferring the correction data from the production device directly to the LED driver, i.e., without storing it in the 10c storage circuit in the print head once beforehand. The light output from the LEDs is then measured, and the correction data is adjusted and repeated until the correction data is optimized. The optimized correction data, as well as... The blinking frequency timing data, determined from the measured average power, is written to the 10c storage circuit. During printer use, the data stored in the 10c storage circuit is used for data correction and setting the blinking frequency timing.

Claims (10)

1. A print head consists of several printing elements: drivers for operating the printing elements according to print data and normalization data, storage paths for storing normalization data, and paths for routing normalization data from external sources to the drives, which bypass the storage paths. 2. The print head of the printer, which consists of an array (30) of printing elements, which contains a number of printing elements (31a to 31n), each of which is selectively driven to print a dot; a driver (20) which consists of a number of driving elements (21a to 21n) that are arranged for their corresponding printing elements (31a to 31n) to drive the printing elements (31a to 31n) according to the print information representing the image to be printed and correction information for adjusting the driving power for each printing element; a storage circuit (10c) to which correction information input from outside the print head is written, and from this section the correction information is sent to the driver (20); and a delivery path (10b) for sending correction information input from outside to the driver (20). 3. The print head, as per claim 2, where modification data stored in the storage circuit (10c) is read and sent outside the print head via the said delivery route (10b). 4. The print head of the printer, which consists of an array (30) of printing elements, each consisting of a number of printing elements (31a to 31n), each of which is selectively driven to print a dot; a driver (20) consisting of a number of drive elements (21a to 21n) that are arranged for their corresponding printing elements (31a to 31n) to drive the printing elements (31a to 31n) according to the print information representing the image to be printed and correction information for adjusting the drive power for each printing element; a storage circuit (10c) to which correction information input from outside the print head is written, from which this correction information is sent to the driver (20); and a delivery path (10b) for sending the correction information stored in the storage circuit (10c) to the outside of the print head. 5. A print head under any of the claims 2, 3 or 4, whereby such delivery method shall include a switching circuit (10b), whereby such print head shall also include a control circuit (10a) for analyzing the switch command signals input from outside the print head and producing control signals dependent on the result of such analysis, and such switching circuit (10b) shall be selectively switched depending on the control signal from the control circuit (10a). 6. The print head, pursuant to claim 3 or 4, whereby the storage circuit (10c) continues to store the existing print head data and the drive (20) continues to drive the printing elements in accordance with the existing data as well. 7. Print head according to claim 6, the existing information of which includes data indicating the blinking frequency. 8. The print head, according to claim 6, which contains the data representing the average light emitted by the print head, and the drive (20) determines the flashing frequency according to the data representing the average light emitted by the print head and thus drives the printing element according to the determined flashing frequency. 9. The print head, according to claim 6, where the drive (20) has a shift register for setting correction data and the storage circuit (10c) is of a type that allows sequential reading and will store correction data at the address following the address in which the print head's existing data is stored. 10. Printheads under any one of claims 6 through 9, the existing information of which shall include details indicating the type of printhead.