Image data sending method and a print device for a print system

• US 20010019417A1
• Filed: 03/01/2001
• Published: 09/06/2001
• Est. Priority Date: 03/03/2000
• Status: Abandoned Application

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Ueki, Masaki
• Application Number:
  US09/797,111
• Publication Number:
  US 20010019417A1
• Time in Patent Office: Days
• US Class Current: 358/1.9
• CPC Class Codes: G06K 15/1219 Detection, control or error compensation of scanning velocity or position, e.g. synchronisation G06K15/1223 takes precedence

Abstract

This print system comprises a characteristic storage section to store the characteristic data peculiar to the engine, a CPU to calculate, based on the characteristic data, the correction data for a certain clock counts after detection of the horizontal sync signal and the correction data for every time a certain time elapsed after that, a modulation data storage section to receive and store the correction data, a quartz oscillator to generate the basic clock, a timer to monitor the time, a counter to count the sync clock pulses, a modulation control section which refers to the correction data upon receipt of the horizontal sync signal, determines the modulation timing according to the timer or the counter and provides modulation instruction to a clock generator for every modulation timing and the clock generator to supply the sync clock obtained by modulation of the basic clock to the controller.

Claims

1. A print system having a print control device to send the image data in synchronization with the sync clock and a print device for print processing based on said image data sent from said print control device comprising:

means for generating a sync clock for sending of said image data on said print device by modulation under the characteristic conditions peculiar to said print device; and

means for adjusting the timing of said image data sending so as to correct the characteristic errors peculiar to said print device by supplying the generated sync clock to said print control device.

2. A print system having a print control device to send the image data in synchronization with the sync clock and a print device for print processing based on said image data sent from said print control device comprising:

means for measuring in advance and store the characteristic data peculiar to said print device which may affect the print intervals in said print processing;

means for calculating the correction data for every certain period of time based on said characteristic data;

means for generating the sync clock modulated by said correction data for every said certain period of time on said print device and supply the same to said print control device; and

means in said print control device for sending said image data to said print device synchronizing with the sync clock supplied from said print device and thereby adjusting said image data to have equal print intervals with controlling the send timing of said image data for every said certain period of time.

3. A print system as set forth in

claim 2

wherein

said modulation is the frequency modulation which makes variable control of the frequency for every said certain period of time.

4. A print system having a print control device to send the image data in synchronization with the sync clock and a print device for print processing based on said image data sent from said print control device comprising:

means for measuring in advance and store the characteristic data peculiar to said print device which may affect the print start position of each line and print intervals in said print processing;

means for calculating, based on said characteristic data, first correction data for the predetermined sync clock counts immediately after detection of the horizontal sync signal and second correction data for every certain period of time after the first correction data;

means for generating the modulation sync clock corresponding to said predetermined sync clock counts by said first correction data and the modulation sync clock for every said certain period of time by said second correction data on said print device and supplying the same to said print control device; and

means in said print control device for sending said image data to said print device synchronizing with said modulation sync clock supplied from said print device and thereby controlling the send timing of said image data for aligning the print start position of the lines in said image data and adjusting the print intervals of said image data equal.

5. A print system as set forth in

claim 4

wherein

said modulation is the frequency modulation which makes variable control of the frequency for every said certain clock counts and said certain period of time.

6. A print system having a print control device to send the image data in synchronization with the sync clock and a print device for print processing based on said image data sent from said print control device wherein

said print device comprising:

an oscillator to output the basic clock;

a storage section to store the characteristic data of the device;

a CPU to set the modulation condition based on the characteristic data of said storage section; and

a modulation circuit which, upon instruction from said CPU for condition of said modulation, modulates the basic clock output from said oscillator and supplies the same as said sync clock to said print control device and

said print control device comprising;

an image data sync circuit which sends said image data to said print device synchronizing with the sync clock supplied from said print device.

7. A print system having a print control device to send the image data in synchronization with the sync clock and a print device for print processing based on said image data sent from said print control device wherein

said print device comprising:

a characteristic storage section storing in advance the characteristic data peculiar to said print device which may affect the print start position of each line and print intervals in said print processing;

a CPU which, based on said characteristic data, calculates first correction data for the predetermined sync clock counts immediately after detection of the horizontal sync signal and second correction data for every certain period of time after the first correction data;

a modulation data storage section which receives and stores the first and second correction data calculated by said CPU;

an oscillator to output the basic clock;

a timer to monitor the elapse of said certain period of time;

a counter which counts the number of sync clock pulses sent from a clock generator;

a modulation control section which, upon receipt of the horizontal sync signal, refers to said first and second correction data from said modulation data storage section, determines the modulation timing according to said timer or said counter and specifies the modulation frequency to a clock generator for every timing of said modulation for modulation instruction; and

a clock generator which, upon receipt of modulation instruction from said modulation control section, modulates the basic clock sent from said oscillator and supplies the same as the sync clock to the image data sync circuit of said print control device and

said print control device comprising;

an image data edit section which develops the print data received from external device into image data;

a memory to store said image data;

a control section which sends the print request signal to said print device and instructs the image data sync circuit to send said image data stored in said memory to said print device; and

an image data sync circuit which sends said image data to said print device synchronizing with the sync clock supplied from said print device.

8. A print device in a print system having a print control device to send the image data to the print device in synchronization with the sync clock and the print device for print processing based on said image data sent from said print control device comprising:

an oscillator to output the basic clock;

a storage section to store the characteristic data of the device;

a CPU to set the modulation condition based on the characteristic data in said storage section; and

a modulation circuit which, upon instruction from said CPU for condition of said modulation, modulates the basic clock output from said oscillator and supplies the same as said sync clock to said print control device.

9. A print device in a print system having a print control device to send the image data to the print device in synchronization with the sync clock and the print device for print processing based on said image data sent from said print control device comprising:

a characteristic storage section storing in advance the characteristic data peculiar to said print device which may affect the print start position of each line and print intervals in said print processing;

a CPU which, based on said characteristic data, calculates first correction data for the predetermined sync clock counts immediately after detection of the horizontal sync signal and second correction data for every certain period of time after the first correction data;

a modulation data storage section which receives and stores the first and second correction data calculated by said CPU;

an oscillator to output the basic clock;

a timer to monitor the elapse of said certain period of time;

a counter which counts the number of sync clock pulses sent from a clock generator;

a modulation control section which, upon receipt of the horizontal sync signal, refers to said first and second correction data from said modulation data storage section, determines the modulation timing according to said timer or said counter and specifies the modulation frequency to a clock generator for every timing of said modulation for modulation instruction; and

a clock generator which, upon receipt of modulation instruction from said modulation control section, modulates the basic clock sent from said oscillator and supplies the same as the sync clock to said print control device.

10. An image data sending method used in a print system having a print control device to send the image data to a print device in synchronization with the sync clock and a print device for print processing based on said image data sent from said print control device wherein

the sync clock for sending of said image data is modulated by the characteristic condition peculiar to said print device and generated by said print device and, by supplying the sync clock to said print control device, the timing of said image data sending is corrected using errors in characteristics peculiar to said print device.

11. An image data sending method used in a print system having a print control device to send the image data to a print device in synchronization with the sync clock and a print device for print processing based on said image data sent from said print control device wherein

characteristic data peculiar to said print device which may affect the print intervals in said print processing are measured in advance and stored, correction data for every certain period of time based on said characteristic data is calculated, sync clock modulated for every said certain period of time according to said correction data is generated by said print device and supplied to said print control device, and said print control device sends said image data to said print device synchronizing with the sync clock supplied from said print device and thereby controls the send timing of said image data for every said certain period of time so as to adjust said image data to have equal intervals.

12. An image data sending method used in a print system as set forth in

claim 11

wherein

said modulation is the frequency modulation which makes variable control of the frequency for every said certain period of time.

13. An image data sending method used in a print system having a print control device to send the image data to a print device in synchronization with the sync clock and a print device for print processing based on said image data sent from said print control device wherein

characteristic data peculiar to said print device which may affect the print start position of each line and print intervals in said print processing are measured in advance and stored and, based on said characteristic data, first correction data for the predetermined sync clock counts immediately after detection of the horizontal sync signal and second correction data for every certain period of time after the first correction data are calculated, the modulation sync clock corresponding to said predetermined sync clock counts according to said first correction data and the modulation sync clock for every said certain period of time according to said second correction data are generated by said print device and supplied to said print control device, and said print control device sends said image data to said print device synchronizing with said modulation sync clock supplied from said print device and thereby controls the send timing of said image data so as to align the print start position for each line of said image data and adjusts said image data to have equal print intervals.

14. An image data sending method in a print system as set forth in

claim 13

wherein

said modulation is the frequency modulation which makes variable control of the frequency for every said certain clock counts or said certain period of time.