JP2006116862A - Recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a record of high-resolution image data at a high speed with a recorder using an inkjet head. <P>SOLUTION: The recorder is equipped with a detection means for detecting the position of a recording head, a first storage means for preserving recording data, a second storage means for reading data from the first storage means and for preserving the data for two or more columns and a formation means for reading data from the second storage means according to signals outputted from the detection means and for forming the drive signal of the recording head. The recorder performs controlling for storing the data in the second storage means and for reading them according to the amount of gaps between nozzle arrays. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a recording apparatus using an inkjet head.

  A print head (recording head) used in an ink jet printer has an ink nozzle that is an opening facing a recording medium at the time of printing, and discharges ink droplets by heating a heater existing in a deep portion of the nozzle to generate bubbles. It has a structure.

  Many printers have used an encoder scale and an optical transmission sensor to detect the scale position to detect the absolute position of the carriage to determine the ink ejection timing, thereby realizing high-definition inkjet printing. It was.

  From the encoder scale, based on the instructed position information, ejection data is transmitted to the inkjet head, and after transmission, energy is input by applying a heat pulse, and ink is ejected to form an image. In recent years, the number of nozzles in the column direction of the head has been increasing, and the printing speed has been improved in proportion to the number of nozzles.

  However, when the number of nozzles increases, it is impossible in terms of power supply capacity to discharge all the data for one column at the same time, and it is necessary to heat the maximum simultaneous discharge nozzles allowed by the power supply to the same block unit and to heat the block unit. . The nozzle data belonging to the block unit is serially transmitted from the inkjet head controller side, and after transmission, the data is latched in the latch circuit inside the head, and then the heat pulse is applied. When the heat pulse is active, the head voltage is In addition to the heater inside the inkjet head, ink is ejected from the nozzle (Patent Document 1)

  In response to a print request from the position information generated from the encoder scale, it is necessary to discharge ink after a predetermined time, and if the discharge data transmission is not in time, the print image will be disturbed as it is. The data immediately before the generation of the discharge data is once stored in advance in the head discharge data SRAM in the controller, and the data can be immediately retrieved in response to the data read request.

Conventionally, the bus width of the head discharge SRAM has been 16-bit or 32-bit configuration. By configuring the bus width inside the ASIC, it is possible to access a normal external memory using a higher-speed clock. I have done it.
JP 2000-43347 A

  In recent years, in order to improve print image quality, the shape of inkjet nozzles has been further miniaturized, and ink droplets have become smaller, so high-resolution printing has become possible. On the other hand, improved printing speed has also been demanded, By increasing the number of nozzles, it is required to reduce the number of head scans per sheet and realize high-speed printing. At this time, in the ink-jet head controller, the internal data processing amount has increased several times in proportion to the number of nozzles and the printing resolution, and from the viewpoint of further increasing the data processing speed, a new configuration of the head ejection data SRAM is provided. Therefore, a processing circuit around the SRAM is required.

  An ink jet recording apparatus of the present invention is a recording apparatus having a plurality of recording modes for performing recording on a recording medium using a recording head having a plurality of nozzle rows capable of driving a plurality of nozzles in units of a plurality of blocks. Detecting means for detecting the position of the recording head; first storage means for holding recording data; second storage means for reading data from the first storage means and holding data for a plurality of columns; and the detection Based on the signal output from the means, the data is read from the second storage means, the generation means for generating the drive signal of the recording head, and the shift amount between the nozzle arrays, the second storage means Control means for storing and reading data is provided.

  As described above, according to the present invention, by setting the bit configuration of the head ejection data SRAM to a value equal to or larger than the number of nozzles × the number of heads included in the block unit for simultaneous ejection of the head, the head ejection data read cycle can be set to all The head can be realized once.

  Furthermore, when writing head ejection data, the unit of blocks for simultaneous ejection of one head is used, and by correcting the position of each color head at the time of writing, the data of each color can be read simultaneously at the time of reading. When reading from the memory, for example, a speed of 12 times can be realized, and the recording throughput of the recording apparatus can be improved.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 3 is a schematic view of a printer (recording apparatus) applied to the present invention.

  Reference numeral 301 denotes an auto-feeder unit, which separates sheets stacked on the sheet one by one and performs a sheet feeding operation by a sheet feeding mechanism such as an LF motor 305 and an LF gear 304. The carriage 307 scans and moves in a direction perpendicular to the paper feeding direction by moving the belt 311 connected to the carriage 307 by the carriage drive motor 310 while the paper is fed.

  An ink jet head 302 is mounted on the carriage 307 and is mounted by a head attaching / detaching lever 308. The carriage 307 is connected to a shaft fixed to the chassis 303 by a bearing 306. The position detection of the scanning movement of the carriage 307 is performed by the encoder scale 312 and the encoder sensor 201 not shown in the figure.

  FIG. 4 is a block diagram relating to the electrical components constituting the ink jet printer. The encoder sensor 201 is mounted on the CR board unit 419, and the encoder sensor 201 reads the encoder scale 312 to detect the movement amount of the carriage. The encoder signal 416 output from the encoder sensor 201 is output to the main board unit 401. The inkjet head 107 is controlled to be ejected by a head drive signal 417 output from the main board unit 401 via the CR board unit 419. Reference numeral 402 denotes a power supply unit that supplies power used by the printer via the main board.

  A PE sensor 413 controls the supply / discharge of the printer by detecting the presence or absence of print paper. Reference numeral 414 denotes a PG sensor, which is a sensor for performing a recovery operation control by detecting a cam position in the recovery unit 309.

  An operation panel 415 includes a switch and an LCD panel, and performs an interface with a user.

  Reference numeral 401 denotes a main board unit, which is a PCB unit on which main electrical components for printer control are mounted. The ink jet printer controller 101, which is the main component of the printer control logic circuit, has a variety of functions on a single chip, such as an ink jet head controller, and receives the signal from the encoder sensor 201 to detect the carriage position, A drive signal 417 is generated. Also, the PE sensor 413, the PG sensor 414, and the operation panel 415 are connected to the inkjet printer controller 101 and controlled. Although not shown in the drawing, the inkjet printer controller 101 also controls the motor control circuit 403.

  The ink jet printer controller 101 is connected to a CPU 405, an interface (I / F) control circuit 408, a program ROM 409, and a RAM 410 via an internal bus 406. An I / F control circuit 408 controls the parallel interface 411 and the serial interface circuit 412.

  The CPU 405 controls the printer by controlling the inkjet printer controller 101 using the program ROM 409 and RAM 410.

  The motor control circuit 403 converts the signal logically processed by the ASIC 407 into drive signals for the PG motor 404, the CR motor 310, the LF motor 305, and the paper feed motor 418. The PG motor 404 is a motor for driving the recovery unit 309, the CR motor 310 is a motor for driving the carriage 307, the LF motor 305 is a motor for transporting paper, and the paper feed motor 418 is the 301 This is a motor for separating sheets one by one from the auto sheet feeder unit and delivering them to the sheet conveying means.

  FIG. 1 is a block diagram showing the main part of the present invention. Reference numeral 101 denotes a custom IC incorporating the circuit of the present invention, which is an ink jet printer controller. The print buffer controller 102 of the print buffer 102 provided in the external SDRAM storing the print data reads out necessary data, performs data processing, and then transfers the data to the head discharge data SRAM controller 104.

  The head ejection data SRAM controller 104 once stores the data in the head ejection data SRAM, reads the data again at a necessary timing, and sends the data to the head ejection waveform generation controller 106. The head ejection waveform generation controller 106 generates a head data transfer waveform and a head drive waveform in a form that matches the specifications of the inkjet head 107.

  FIG. 2 shows the details of FIG. The encoder pulse equivalent to 300 dpi received from the encoder sensor 201 is input to the inkjet printer controller 101, and encoder pulses equivalent to 600 dpi, 1200 dpi, and 2400 dpi are generated using the encoder signal multiplication circuit 202, and the encoder sequence controller 203 is supplied. input. The encoder sequence controller 203 controls the print buffer controller 103 and the head discharge data SRAM controller 104 in accordance with the printer operation mode set in the mode register 204.

  Based on the preset print start position information, the encoder sequence controller 203 makes a data access request to the print buffer sequence controller 205. Upon receiving the request, the print buffer sequence controller 205 generates a memory address via the print buffer address generation circuit 206, converts it into an SDRAM access waveform by the SDRAM controller 207, and performs a burst read operation on the print buffer SDRAM 102.

  The read data read in burst is converted into a bus width by the SDRAM controller 207, expanded to a 256-bit bus, and sent to the data generation circuit 208. The data generation circuit 208 performs the 256-bit data access three times, extracts necessary data, creates 640-bit data, and transfers it to the head discharge data SRAM controller 104.

  The sequence controller 210 provided in the head ejection data SRAM controller 104 operates at the timing determined by the encoder sequence controller 203 and the print buffer sequence controller 205, and receives the data from the data generation circuit 208 via the write control circuit 211. The stored data is stored in accordance with the format of the head ejection data SRAM 105 via the bus controller 212.

  Further, the read controller circuit 213 is activated by the sequence controller 210 and reads data from the head ejection data SRAM 105 via the 212 bus controller. A bus controller 212 performs bus arbitration for the head ejection data SRAM 105 of the write control circuit 211 and the read control circuit 213.

  The data read by the read control circuit 213 is converted into a serial transmission waveform according to the specifications of the inkjet head 107 by the head ejection waveform generation controller 220 and transmitted.

  The inkjet head 107 includes six heads, a yellow head 230, a light magenta head 231, a magenta head 232, a light cyan head 233, a cyan head 234, and a black head 235, and a drive waveform is supplied to each head. .

  FIG. 5 is a diagram for explaining a method in which the head discharge data SRAM controller 104 performs FIFO control of the head discharge data SRAM 105. The memory area stored in the head ejection data SRAM 105 is divided into three and stores data for three head columns. There are three typical control states.

  Reference numeral 501 denotes state 1. The nth column data in state 1 is stored in 502, and the read control circuit 213 is in a read or readable state. 503 stores data of the (n + 1) th column in state 1. Reference numeral 504 denotes a write end state in which data in the n + 2 column in state 1 is being written or can be written by the write control circuit 211.

  Reference numeral 511 denotes state 2. In 512, the data in the n + 3th column in the state 2 is being written or can be written by the write control circuit 211, and is in the write end state. 513 stores the data of the (n + 1) th column in the state 2, and the read control circuit 213 is in the state of being readable or readable. 514 stores data of the (n + 2) th column in the state 2.

  Reference numeral 521 denotes state 3. 522 stores data of the (n + 3) th column in the state 3. In the state 523, the data in the (n + 4) th column in the state 3 is being written or can be written by the write control circuit 211, and is in a write end state. 524 stores data in the (n + 2) th column in the state 2, and the read control circuit 213 is in a state of being read or in a readable state.

  By repeating the above operations, the head ejection data SRAM 105 can be used as a FIFO to satisfy the access timing.

  FIG. 6 is a diagram for explaining the data structure in the head ejection data SRAM 105 at the time of 24 block division driving. The memory area stored in the head ejection data SRAM 105 is divided into a total of three parts, ie, 601 n-column data, 605 n + 1 column data, and 609 n + 2 column data, and stores data for three head columns. .

  The n column data of 601 is subdivided into 24 block data. In the figure, 602 is the data of the first block of the n column, 603 is the data of the second block of the n column, and 604 is the data of the n column. 24th block data is shown. Similarly, 606 is the data of the first block of the n + 1 column, 607 is the data of the second block of the n + 1 column, 608 is the data of the 24th block of the n + 1 column, 610 is the data of the first block of the n + 2 column, and 611 is n + 2. Data 612 in the second block in the column is data in the 24th block in the n + 2 column.

  FIG. 7 is a diagram for explaining the details of the data configuration in the head ejection data SRAM 105 when the six-color head is driven.

  The memory area stored in the head ejection data SRAM 105 is divided into three areas: 730 n-column data, 740 n + 1 column data, and 750 n + 2 column data. Are stored together.

  In this embodiment, since each of the six color heads has two heads for odd nozzles (nozzle rows) and even nozzles, printing can be performed at twice the resolution of the nozzle rows. Data belonging to one block of each head is 27 bits, and is 32 bits from the simplification of the memory configuration.

  The memory bus width is 382 bits (6 (number of colors) × 2 (number of nozzle rows (odd number row, even number row) × 32 = 382)).

  More specifically, among the 384 bits, 700 is Y (yellow) even 32-bit data, and 701 is Y odd 32-bit data. 702 is LM (light magenta) even 32-bit data, 703 is LM odd 32-bit data, 704 is M (magenta) even 32-bit data, 705 is Mod 32-bit data, and 706 is LC (light cyan). Even 32-bit data, 707 is LC odd 32-bit data, 708 is C (cyan) even 32-bit data, 709 is C odd 32-bit data, 710 is BK (black) even 32-bit data, and 711 is It is 32-bit data of BK odd.

  In the data of n + 1 column of 740, 731 indicates the data of block 0 of the nth column, 732 indicates the data of block 1 of the nth column, 733 indicates the data of block 2 of the nth column, and 734 indicates the data of block 23 of the nth column. .

  In the data of n + 1 column of 740, 741 indicates the data of block 0 of the (n + 1) th column, 742 indicates data of the block of n + 1 column, 743 indicates the data of block 2 of the n + 1 column, and 744 indicates the data of block 23 of the n + 1 column. .

  In the data of the n + 2 column of 750, 751 indicates the data of block 0 of the n + 2 column, 752 indicates the data of block 1 of the n + 2 column, 753 indicates the data of block 2 of the n + 2 column, and 754 indicates the data of block 23 of the n + 2 column.

  FIG. 8 is a waveform diagram in 24 block division driving. The vertical axis 840 is a voltage axis, the horizontal axis 841 is a time axis, and time passes from left to right.

  Reference numeral 801 denotes a 300 dpi A-phase encoder pulse input from the encoder sensor 201. Similarly, reference numeral 802 denotes a B-phase encoder pulse. Reference numeral 803 denotes a pulse width required for the carriage to move a distance of 300 dpi. Carriage is 25 inch / sec. When moving at a speed of 133 s, the time is 133 us. Reference numeral 804 denotes a trigger waveform for every 300 dpi created from the waveform of the encoder A phase of 801. Reference numeral 805 denotes a trigger waveform having a 600 dpi period created by the encoder signal multiplication circuit 202. Reference numeral 806 is an enlarged view of a trigger waveform of 805 having a 600 dpi period, and 807 indicates a pulse width corresponding to 600 dpi.

  Reference numeral 808 denotes a block trigger waveform for driving a pulse width equivalent to 600 dpi in 24 divisions, 809 denotes a heat pulse waveform, 810 denotes a heat pulse for block 1, and 811 denotes a heat pulse for block 2.

  820 is a latch pulse waveform for latching serially transferred data, 821 is a block 1 latch pulse, and 822 is a block 2 latch pulse.

  830 is a serial clock waveform, 834 is a serial data waveform 1, 835 is a serial data waveform 2, 832 is data in block 2, and 833 is data in block 3.

  In FIG. 7, the data to which each block of each color belongs is 32 bits, of which 27 bits are used for print data and the remaining 5 bits are used for block instruction. Due to the time restriction of the 830 serial clock signal, The data is divided into two data lines 834 and 835 for output.

  FIG. 9 is a diagram illustrating a case where printing is performed on the printing paper 901 at the time of 24 division driving. Reference numeral 107 denotes an inkjet head, and reference numeral 901 denotes a printing paper (recording medium). The nozzle position when the inkjet head is seen through from above is as shown in the figure. The nozzle 905 belongs to block 23 and the nozzle 906 belongs to block 0. The inside of the inkjet head 107 has a nozzle arrangement belonging to the same block every 24 nozzles. Reference numeral 904 denotes a movement (operation) direction of the carriage, and a head 107 moves from left to right on the printing paper 901.

  Since the nozzle position is shifted for each block, after ejecting the nozzle of block 0, the 107 inkjet head is moved to the right, and then the nozzle of block 1 is ejected. And the printing result is printed in a straight line like the print data in the first column 902.

  Reference numeral 903 denotes a printing result of the second column shifted by 1/600 inch of 918. The one-column printing of 902 is the result of discharging all the upper 24 dots of the 910 Y even head (nozzle row). The nozzle arrangement resolution 600 dpi of 910 is directly connected to the printing result, and the distance between dots of 916 is 1/600 inch.

  For the one-column printing 903, the upper 24 dots of the Even head 910 and the upper 24 dots of the Yodd head 911 are all ejected. Since the nozzle arrangement resolution 600 dpi of 910 and 911 is shifted by 1/1200 inch, the distance between the dots of 917 is 1/1200 inch.

  In the inkjet head 107, reference numeral 910 denotes a Y even head, 911 denotes a Y odd head, 912 denotes an LM even head, 913 denotes an LM odd head, and 914 denotes a BK odd head. 915 indicates the distance between the Yeven head and the LMeven head, which is 6/600 inch. That is, the distance is 6 columns when printing at 600 dpi. In this case, after discharging with the 912 LMeven head, and after discharging from the 910 Yeven head after the carriage operation for six columns, printing is overlapped. By overlapping this operation for all 12 heads, color printing is realized.

  FIG. 10 is a diagram for explaining the timing of data transfer (writing, reading) when the six-color head is driven. The x-axis at 1070 indicates time. Reference numeral 1001 denotes the use state of the print buffer. A period indicated by 1002 is an access state of the print buffer, and a period indicated by 1003 is a state of no access.

  In this figure, it is assumed that only the print buffer controller 103 is assumed to access the print buffer, and there is a sufficient margin for accessing the print buffer.

  Specifically, 1004 is an n-column Y HSRAM write data read, 1005 is an n-column LM HSRAM write data read, 1006 is an n-column M HSRAM write data read, and 1007 is an n-column data read. The data read access for HSRAM write of LC, 1008 is the data read for HSRAM write of C in the n column, and 1009 is the access period of the data read for HSRAM write of the BK in the n column.

  The data read from the print buffer is processed by the print buffer controller 103 and then written into the head discharge data SRAM 105 by the head discharge data SRAM controller 104 (hereinafter referred to as HSRAMC). Reference numeral 1010 denotes a Y data write (data storage) transfer waveform to the HSRAMC, 1011 denotes a Y data write transfer to the n-column HSRAMC, 1012 denotes an LM data write transfer waveform to the HSRAMC, and 1013 denotes an n-column HSRAMC. LM data write transfer to, 1014 is M data write transfer to HSRAMC, and 1015 is M data write transfer to n-column HSRAMC. 1016 is an LC data write transfer to the HSRAMC, 1017 is an LC data write transfer to the n-column HSRAMC, 1018 is a C data write transfer to the HSRAMC, and 1019 is a C data write transfer to the n-column HSRAMC. Reference numeral 1020 denotes BK data write transfer to the HSRAMC, and 1021 denotes BK data write transfer to the n-column HSRAMC.

  Reference numeral 1030 indicates Y data read (data read) transfer from the HSRAMC, and reference numeral 1031 indicates Y data read transfer from the n-2 column HSRAMC, which indicates 24 read transfers of all 24 blocks during this period. .

  Reference numeral 1032 denotes LM data read transfer from the HSRAMC, and reference numeral 1033 denotes LM data read transfer from the HSRAMC of the n-2 column. Reference numeral 1034 denotes M data read transfer from the HSRAMC, and reference numeral 1035 denotes M data read transfer from the HSRAMC of the n-2 column. Reference numeral 1036 denotes LC data read transfer from the HSRAMC, and reference numeral 1037 denotes LC data read transfer from the n-2 column HSRAMC. Reference numeral 1038 denotes C data read transfer from the HSRAMC, and reference numeral 1039 denotes C data read transfer from the n-2 column HSRAMC. Reference numeral 1040 denotes BK data read transfer from the HSRAMC, and reference numeral 1041 denotes BK data read transfer from the n-2 column HSRAMC.

  Reference numeral 1050 indicates serial transfer to the head. The waveform received by reading data from the HSRAMC of 1030, 1032, 1034, 1036, 1038, and 1040 is converted into serial data, and the waveform is output in accordance with the head specifications. It is. Reference numeral 1051 denotes serial transfer to the head of the n-2 column, and the data transfer of all 24 blocks for 6 colors is collectively displayed. Reference numeral 1052 denotes a period in which the transfer state is indicated, and reference numeral 1053 denotes a period in which no transfer is performed.

  Reference numeral 1060 denotes a head heat signal for heating the data received at 1050. Reference numeral 1061 denotes a heat signal of the n-2 column head. Actually, 24 pulses corresponding to 24 blocks are included.

  FIG. 11 is an explanatory diagram for data of one color. 1101 is an enlargement of the details of the Y odd data write transfer of the nth column of 1011 and actually indicates that 24 blocks of data are executed in 24 32-bit write cycles. The same applies to the data transfer of heads (nozzle rows) other than Y, and a description thereof will be omitted.

  As shown in the figure, the processing of each color is performed in order with respect to the write cycle, and only the data of yellow odd is written in 1011. Reference numeral 1102 denotes Yodd data read transfer to the HSRAMC. Similarly, the read cycle indicates that 24 blocks of data are executed by 24 read cycles. In this figure, yellow odd data is representative, but in reality, data of 12 heads are read simultaneously, that is, 384 bits simultaneously.

  Reference numeral 1103 indicates serial transfer to the head. Although only the representative waveform is shown in the figure, this serial transfer is performed simultaneously for all 12 heads (nozzle rows). In this way, the processing of 1102 and 1103 is performed on all the heads in parallel, thereby performing 12 times faster processing.

  FIG. 12 is a diagram showing a print image at the time of 24 division driving, as in FIG. The difference is that the LM even head 912 and the LM odd head 913 are shifted to the left by 1/600 inch like the 1200 LM even head and the 1201 LM odd head. Therefore, the distance between the 1202 1202 Even head and the LMeven head of 1202 is 5/600 inch.

  In other words, after discharging by the 912 even head of 912, printing is overlapped by discharging from the Y even head of 910 after the carriage operation for five columns instead of the six columns in FIG. By repeating the same operation for all 12 heads, color printing is realized.

  FIG. 13 is an explanatory diagram of data transfer in 24-block division driving. The waveform in the 24 block division drive in FIG. 8 is corrected to the waveform when the LM head as shown in FIG. In 1300, LM data read for HSRAM write of n-1 column is executed, and as shown in 1011, 1015, 1017, 1019, 1021, data write transfer of n columns to each color HSRAMC is performed. Only for light magenta, LM data write transfer to the n-1 column HSRAMC is performed as indicated at 1301.

  Similarly, as shown in 1031, 1035, 1037, 1039, and 1041, n-2 columns of data are transferred to each color HSRAMC as shown in 1301 only for light magenta. LM data read transfer to the HSRAMC is performed. 1051 is representatively shown as serial transfer to the head of the (n-2) th column, but with respect to LM, serial transfer to the head of the (n-3) th column is executed. 1061 is also representatively shown as the heat signal for the head in the (n-2) th column, but for LM, the heat signal for the head in the (n-3) th column is output.

  FIG. 14 is a flowchart showing a printer control method when the number of ink jet heads used is variable, which is the operation of the present invention.

  First, the printing process is started in S101 by a user operation. In S102, it is determined whether or not the head position used in the printer is normal.

  When normal, a default value is set based on the positional relationship of the head determined in advance in S111, and other controller print parameters are set in S112. If it is not normal in S102 (there is a head misalignment), a correction position is set in the print buffer control and HSRAM control circuit in S121, and other controller print parameters are set in S122. This displacement may be obtained, for example, by outputting a test pattern and using the result, or a value preset in a storage unit provided in the apparatus may be used.

  Next, in S131, data is received from the host device via the interface (I / F), print data is created in S132, and a paper feeding operation is performed in S133. In S151, the carriage scan operation is started. The carriage is accelerated to the printing speed. In S152, the printing operation is performed with the number of drive blocks set in S102. In S153, one scan printing is completed, and the carriage is decelerated and stopped. This completes the carriage scan operation in S154. After the one-scan printing, if it is not determined in S155 that the printing has been completed, a S156 paper feed operation is performed, and one-scan printing is performed again in S151. If it is determined in S155 that the printing has been completed, the paper discharge operation is performed in S160, and the printing is completed in S161.

  As described above, an ink jet head having a structure in which nozzles for recording for one column receive data divided into block units to be ejected simultaneously, and energy is applied by heat pulses after the data is received is used. In the recording apparatus, the data immediately before the ejection data generation is once stored in advance in the head ejection data SRAM in the controller, and the bit configuration of the head ejection data SRAM is used as a configuration in which data can be immediately retrieved in response to a data read request. By providing more than the number of nozzles × the number of heads included in the block unit for simultaneous ejection, the head ejection data read cycle can be realized once. In addition, writing is performed in units of blocks that are simultaneously ejected by one head, and the position of each color head is corrected at the time of data writing so that the data of each color can be read out simultaneously at the time of reading. Further, mechanical position correction by the head device is also possible by correcting the address at the time of writing.

  Although the present invention has been described above, it is not limited to the values described above. For example, the number of recording heads is not limited to 6, and the number of divided drives is not limited to 24.

The figure explaining the control block of the printer in an embodiment of the invention Detailed explanatory view of FIG. 1 in the embodiment of the present invention Overview of printer in an embodiment of the present invention The figure explaining the structure of the printer in embodiment of this invention The figure explaining control of the buffer in an embodiment of the invention Explanatory drawing of 24 block division drive in an embodiment of the invention Explanatory drawing of data storage of SRAM at the time of 6 color head drive in embodiment of this invention Explanatory drawing of the control signal in 24 block division drive in an embodiment of the invention Explanatory drawing about a nozzle row, a block, and a nozzle at the time of 24 block division drive in an embodiment of the invention Explanatory drawing of timing about transfer, storage, and reading of data for six colors in the embodiment of the present invention Explanatory drawing about the data for one color in FIG. 10 in the embodiment of the present invention Explanatory drawing about a nozzle row, a block, and a nozzle when the attachment position of LM head in embodiment of this invention has shifted | deviated 1/600 Explanatory drawing of the timing for data transfer, storage, and reading when the position correction of the LM head in the embodiment of the present invention is performed 1 is a flowchart showing a printer control method according to an embodiment of the present invention.

Claims (2)

A recording apparatus having a plurality of recording modes for recording on a recording medium using a recording head provided with a plurality of nozzle rows capable of driving a plurality of nozzles in units of a plurality of blocks,
Detecting means for detecting the position of the recording head;
First storage means for holding recording data;
Second storage means for reading data from the first storage means and holding data for a plurality of columns;
Generation means for reading data from the second storage means based on a signal output from the detection means and generating a drive signal for the recording head;
A recording apparatus comprising: a control unit configured to store and read data in the second storage unit according to a deviation amount between the nozzle rows.   2. The recording apparatus according to claim 1, wherein the bit configuration of the second storage unit is larger than the number of nozzles belonging to a block unit to be simultaneously ejected among all nozzles of one column in the recording head.

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