JP6869033B2 - Inkjet recording device and control method - Google Patents

Description

The present invention relates to an inkjet recording device.

A general inkjet recording device includes a recording head in which an ink ejection port (nozzle) and a recording element such as a heater or a piezo element, which is an energy generating unit for ejecting ink droplets, are arranged so as to correspond to each other. The inkjet recording apparatus records by repeating recording scanning in which the recording head is moved in the main scanning direction and ink droplets are ejected on the recording area, and transfer of the recording medium in the sub-scanning direction intersecting the main scanning direction. Record the image on the medium.

It is difficult for the inkjet recording apparatus to have a power supply capacity for ejecting ink droplets from all the ink ejection ports at the same time in each ink ejection port row of the recording head due to an increase in power supply cost and the like. Therefore, as a nozzle drive method, a time-division drive method is used in which each recording element is driven in a time-division manner. In the time-division drive system, the recording elements are divided into a plurality of groups in each ink ejection port row, and the recording elements are assigned to different blocks in each group. Then, the recording elements of each block are sequentially driven with time, and all the recording elements are driven by making a round. By repeating such an operation in the main scanning direction, recording is performed in the recording area for one main scanning. For example, inside the recording head, 256 ink ejection ports (SEGs) are divided into 16 groups, only 1 SEG is selected in each group by the signal decoded by the decoder, and the blocks are simultaneously driven as a common block in each group. To.

Further, in the inkjet recording device, the recording head may be tilted with respect to the inkjet recording device due to an error in mounting the recording head on the inkjet recording device or an error in assembling the recording head. Therefore, a shift in the dot formation position due to this tilt, a so-called tilt shift, may occur.

In order to correct such a tilt deviation, Patent Document 1 states that in a time-division-driven recording device, fine tilt correction is performed for each drive block by changing the recording data of the block to be time-division-driven. It is stated that it will be realized. Patent Document 1 also describes that by mounting a recording head at a certain angle, it is possible to absorb the sequential landing difference of ink and obtain a print result without tilt. Further, Patent Document 2 describes that the image due to the inclination at the time of attaching the recording head is corrected by changing the block order to be driven for each group.

Japanese Unexamined Patent Publication No. 2004-09489 U.S. Pat. No. 6,350,0004

When the operations of Patent Document 1 and Patent Document 2 are applied to the correction when drawing the ruled line of one column, it is conceivable to perform the inclination correction as shown in FIG. 20 (A). In FIG. 20A, 0/16 correction is set for group 0, 2/16 correction is set for group 1, and 4/16 correction is set for group 2.

However, dots 1 to 16 of group 0 are drawn in a straight line, but in group 1, dots 1 and 2 are drawn after dot 16 of group 0, and in group 2, dots 1 to 4 are drawn in group 1. It will be drawn after the dot 16 of. Therefore, as shown in FIG. 20B, the drawing is performed at a position deviated by one column (1200 dpi) from the originally arranged position. As a result, a step is generated between the dots 2 and 3 in the group 1 and between the dots 4 and 5 in the group 2. This step may affect the character quality, for example, in the case of a small-sized character having a size of 5 points.

On the other hand, in Patent Document 2, in order to change the block order to be driven for each group, it is necessary to transmit a different drive block number for each group to the recording head. In the time-division drive system, it is necessary to transmit the drive block number for each drive. Therefore, in the case of 16-division drive, it is necessary to transmit the 4-bit block number data for the number of groups. As a result, the transmission data transfer time becomes long, which hinders the speeding up of the recording time.

An object of the present invention is to solve such a conventional problem. In view of the above points, it is an object of the present invention to provide an inkjet recording apparatus and a control method for preventing deterioration of image quality and improving processing efficiency in recording.

In order to solve the above problems, the inkjet recording device according to the present invention is an inkjet recording device that records data on a recording medium by a recording head having a plurality of nozzles, and a plurality of recording elements corresponding to the plurality of nozzles are used. When recording on a recording medium, a driving means that groups the recording elements corresponding to adjacent nozzles and drives the recording elements as blocks that are driven at the same timing between the groups in a time-divided manner for each block. A recording head having a drive control means for controlling the drive timing of the recording element by the drive means by using a correction value for correcting the inclination of the recording head held in the recording head, and a recording medium. The correction value is transmitted to the recording head before recording to the recording medium, and when recording to the recording medium, the nozzles corresponding to the recording elements having the same drive timing as a result of the control by the drive control means are supported. The drive control means includes a transmission control means for transmitting the recorded data corresponding to the plurality of nozzles and the information of the block to the recording head, which are rearranged so as to be a combination of the recorded data. Corresponds to the head nozzle based on the drive timing of the recording element corresponding to the head nozzle in the nozzle arrangement in the group obtained by using the block information transmitted by the transmission control means and the correction value. It is characterized in that control is performed so as to sequentially delay from the recording element to the recording element corresponding to the last nozzle along the direction of the nozzle arrangement.

According to the present invention, it is possible to prevent deterioration of image quality and improve processing efficiency in recording.

The figure which shows the structure around the recording head of an inkjet recording apparatus. The figure which shows the structure of the recording head. The figure which shows the ink ejection port row of a recording head. The figure which shows the structure of the control system in an inkjet recording apparatus. The figure which shows the internal structure of ASIC. The figure which shows the internal structure of a recording head. The figure which shows the internal structure of each SEG group. The figure which shows the internal structure of a command interpretation block. The figure which shows the timing waveform of the transmission data to a recording head. A flowchart showing an offset data transmission process. A flowchart showing a transmission process of block data and print data. The figure which shows the arrangement of the image data in the 1st recording memory. The figure which shows the structure of the 2nd recording memory. The figure which shows the structure of the 3rd recording memory. The figure which shows the data which is transmitted to a recording head without tilt correction. The figure which shows the data which is transmitted to a recording head when a correction value is set. The figure which shows the correction value for each group. It is a figure which shows the state that the data was transmitted for each group. It is a figure which shows the drawing on the paper surface when the tilt correction is performed. It is a figure which shows the drawing on the paper surface at the time of performing the conventional tilt correction.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the following embodiments do not limit the present invention according to the claims, and not all combinations of features described in the present embodiment are essential for the means for solving the present invention. .. The same components are given the same reference numbers, and the description thereof will be omitted.

The inkjet recording apparatus according to the present embodiment will be described with reference to FIGS. 1 and 2. The inkjet recording device 100 includes an automatic feeding unit 101, a conveying unit 103, and a recovery unit 108. The automatic feeding unit 101 automatically feeds a recording medium such as paper into the main body of the apparatus. The transport unit 103 guides the recording media sent out one by one from the automatic feeding unit 101 to a predetermined recording position, and guides the recording medium from the recording position to the discharging unit 102. The recovery unit 108 performs a recovery process on the recording unit that performs desired recording on the recording medium conveyed to the recording position. The recording unit includes a carriage 105 movably supported by a carriage shaft 104 in the main scanning direction of the arrow X, and a recording head 10 detachably mounted on the carriage 105.

The carriage 105 is provided with a carriage cover 106 and a headset lever 107 for engaging with the carriage 105 and guiding the recording head to a predetermined mounting position on the carriage 105. The headset lever 107 engages with the tank holder 113 of the recording head 10 and presses the recording head 10 to set it in a predetermined mounting position. A headset plate (not shown) that is rotatably provided on the upper part of the carriage 105 with respect to the headset lever shaft and is spring-loaded is provided at an engaging portion with the recording head 10. Due to the spring force, the headset lever 107 is mounted on the carriage 105 while pressing the recording head 10.

FIG. 2 is a diagram showing a configuration of a recording head 10 applicable to the present embodiment. The recording head 10 is a side shooter type recording head that ejects droplets in a substantially vertical direction of the heater substrate. The recording head 10 includes a recording element unit 111, an ink supply unit 112, and a tank holder 113. Further, the recording element unit 111 includes a first recording element 114, a second recording element 115, a first plate 116, an electric contact substrate 119, and a second plate 117.

The first plate 116, which requires planar accuracy because it affects the ejection direction of droplets, is made of an alumina (Al ₂ O ₃ ) material having a thickness of 0.5 to 10 mm. The second plate 117 is a single plate-shaped member having a thickness of 0.5 to 1 mm, and is laminated and fixed to the first plate 116 via an adhesive. The first recording element 114 and the second recording element 115 are adhesively fixed to the surface of the first plate 116. It is difficult to mount the recording head 10 with high accuracy due to the accuracy of mounting and the movement of the adhesive, which is one of the causes of the assembly error of the recording head 10.

FIG. 3 is a diagram showing a recording head 10 having an ink ejection port row composed of 128 ink ejection ports (nozzles) 11. In the present embodiment, nozzle numbers 0 to 127 are virtually assigned to the ink ejection port 11 in order toward the downstream side. Further, the ink ejection ports 11 are grouped into groups 0 to 7 by 16 adjacent nozzles from the smallest nozzle number, and block 0 is sequentially formed in each group from the recording element corresponding to the ink ejection port having the smallest nozzle number. Allocate block 15 from. In the present embodiment, drive control is performed in which the drive timing of the recording element is sequentially changed in a time division manner. That is, an image is recorded by selecting a recording element from the recording elements to which the block number is assigned by time division and driving the selected recording element. In this embodiment, the case where dots are formed in the regions of three columns from the first column to the third column and an image is recorded by using all the ink ejection ports 11 of the recording head 10 will be described as an example. Do.

FIG. 4 is a diagram showing a block configuration of a control system in the inkjet recording device 100. The CPU 201 controls the inkjet recording device 100 in an integrated manner. The operation of the inkjet recording device 100 is realized, for example, by the CPU 201 reading the control program stored in the ROM 202 into the RAM and executing the operation. The image data in raster units received from the host computer 200 such as an external PC via the network is the image data to be recorded by the inkjet recording apparatus 100, and is first stored in the reception buffer 203. The image data stored in the reception buffer 203 is compressed in order to reduce the amount of data transmitted from the host computer 200, and is compressed and decompressed by the CPU 201 or decompressed by a compression and decompression circuit (not shown). It is stored in the recording memory 204 of 1. The image data stored in the first recording memory 204 is subjected to HV conversion processing by the HV conversion circuit 205, and is stored in the second recording memory 211 in the ASIC 206. The configuration of the ASIC 206 will be described later.

Here, FIG. 12 schematically shows the arrangement of image data in the first recording memory 204. The storage position of the first recording memory 204 is an address 000 to 0FE corresponding to 128 recording elements in the vertical direction, and a memory area corresponding to the print resolution × the size of the recording medium in the horizontal direction. Here, the print resolution is 1200 dpi, the size of the recording medium is 8 inches, and in that case, the memory area for recording 9600 dots of data is provided. The recording data of the recording element having the nozzle number 0 is held at b0 at the address 000h in FIG. In b1 of FIG. 12, the recorded data of the next column of nozzle number 0 is held, and similarly, the data to be recorded in the next column is held as it moves in the lateral direction. Similarly, the recorded data of the nozzle number 127 is held at the address 0FE.

As shown in FIG. 12, the first recording memory 204 holds data of the same nozzle number in the address. However, in reality, the data of b0 from addresses 000 to 0FE is recorded as the first column, and then the data of b1 from addresses 000 to 0FE is recorded as the second column. Therefore, the HV conversion circuit 205 performs HV conversion on the recorded data stored in the first recording memory 204 in the raster direction, and stores the recorded data stored in the second recording memory 211 in the column direction. The HV conversion is performed, for example, in units of 16 × 16, and the operation of writing the data of the addresses 0 to 1E of the specific column read from the first recording memory 204 to the address 0 of the second recording memory 211 is performed 16 times. Repeat. Further, the HV conversion is performed in group units, and is performed in order from group 0 to group 7.

FIG. 13 shows the configuration of the second recording memory 211. Since the HV conversion is performed during the recording operation, the writing operation to the second recording memory 211 and the reading operation from the second recording memory 211 are configured to be exclusive operations. That is, as shown in FIG. 13, the second recording memory 211 has a 2 Bank configuration in which 16 columns are 1 Bank. When writing to Bank0, reading is performed from Bank1, while when writing to Bank1, reading is performed from Bank0.

Next, a configuration for sequentially driving the recording elements in a time-division manner will be described with reference to the internal block diagram of the ASIC 206 of FIG.

The data sorting circuit 212 is a circuit for sorting recorded data. That is, the data sorting circuit 212 collects the recorded data held in the second storage memory 211 so as to correspond to 127 recording elements into 8-bit recorded data for each block number recorded at the same time. Write to the third storage memory 213.

FIG. 14 is a diagram showing the configuration of the third recording memory 213. Recorded data from blocks 0 to 15 are sequentially held at addresses (Ad) 0 to F. Block 0 holds 8-bit data from group 0 to group 7, and similarly, block 1 holds 8-bit data from group 0 to group 7. Further, in the data sorting circuit 212, at the same time as sorting the data for each group, the data is replaced according to the inclination correction value for each group stored in the correction value storage unit 217. The correction value will be described later in FIG.

FIG. 15 is a diagram showing data transmitted to the recording head 10 without tilt correction. The transmission order is described in order from 0 to 47, and the transmission block data is data for sequentially transmitting to the recording head 10 from 0 to 15 and sequentially driving the data. The transmission data indicates a segment (hereinafter referred to as SEG) and a column number to be transmitted to bit 0 to bit 7 in 8 bits. Numbers 0, 1 and 2 on the left side indicate column numbers, and numbers 0 to 127 on the right side indicate SEG numbers. For example, in the transmission order 0, the 0 SEG data of the 0 column is stored in the bit 0, and the 16 SEG skip data is stored in the bits 1 to bit 7. In the transmission order 1, bit0 stores the data of 1SEG of 0 column, and bit1 to bit7 store the data of 16SEG skipping. FIG. 17A is information showing the correction value for each group, and in FIG. 17A, the correction value is 0 for all groups.

FIG. 17B is information showing correction values for each group when the recording head 10 is tilted, and different correction values are set in advance for each group. FIG. 16 is a diagram showing data transmitted to the recording head 10 when a correction value is set as shown in FIG. 17B. For example, in the transmission order 0, bit0 stores 0SEG data in column 0, and bits1 to bit7 store NULL data. In the transmission order 1, bit0 stores 1SEG data of 0 column, bit1 stores 16SEG of 0 column, and bit2 to bit7 stores NULL data. That is, the data of 17SEG that originally belongs to the block 1 should be stored in the bit 1 of the transmission order 1, but the correction value 1 is set in the group 1. Therefore, in the present embodiment, the 16SEG data is transmitted one order later than the timing at which it should be originally transmitted.

Further, in the transmission order 2, bit0 stores the data of 2SEG of 0 column, bit1 stores 17SEG of 0 column, and bit2 stores 32SEG of 0 column. NULL data is stored in bit7. That is, the data of 18SEG that originally belongs to the block 1 should be stored in the bit 1 of the transmission order 2, but the correction value 1 is set in the group 1. Therefore, in the present embodiment, the data of 17SEG is transmitted one order later than the timing at which it should be originally transmitted. Similarly, since the correction value 2 is set in the group 2, the data of bit2 is transmitted two times later than the timing at which it should be originally transmitted. After that, the timing to be transmitted will be delayed according to the correction value up to bit7 in order.

The data sorting circuit 212 replaces the data according to the inclination correction value when collecting the data for each block in order to transmit the data as described above. The lateral data of bits 7 to 0 of FIGS. 15 and 16 in which the data has been replaced are stored in the third memory 213 of FIG.

As shown in FIG. 14, the third recording memory 213 has a 2 Bank configuration in which 16 blocks of data are 1 Bank so that the write operation and the read operation are exclusive operations. When writing to Bank0, reading from Bank1 is performed, and when writing to Bank1, reading from Bank0 is performed.

See again in FIG. The transfer count counter 216 is a counter circuit that counters the number of recorded signals, and is incremented for each recording timing signal. The transfer count counter 216 counts from 0 to 15 and returns to 0. Further, the transfer count counter 216 counts the Bank value of the third recording memory 213, and when the transfer count counter 216 counts 16 times, the Bank value is incremented by +1.

In the block drive order data memory 214, the order in which the 16-divided recording elements of block numbers 0 to 15 are sequentially driven is recorded as 0000 to 1111 at addresses 0 to 15. When driving sequentially from 0, it is stored in the order of 0, 1, 2, .... The drive order is read from the block drive order data memory 214 based on the number of transfers counted by the transfer count counter 216.

The recording data transfer circuit 219 increments the transfer count counter 216, for example, using a recording timing signal generated based on an optical linear encoder as a trigger. The data read circuit 215 reads the image data corresponding to the value from the block drive order data memory 214 and the Bank value from the third memory 213 starting from the recording timing signal. Then, the data read circuit 215 reads the image data in synchronization with the data transfer CLK signal (HD_CLK) generated by the data transfer CLK generator 218, and the read image data is recorded via the recording data transfer circuit 219. Transferred to 10.

FIG. 6 is a diagram showing an internal logic configuration of the recording head 10. The command interpretation block 400 is a block that starts from the rising edge of H_LATCH and takes in H_DATA at the rising / falling edge of H_CLK to interpret the command. The command interpretation block 400 outputs block data 4 bits, office data 32 bits, and print data 8 bits as a result of command interpretation.

The recording head 10 includes eight arithmetic units from the arithmetic unit 401 to the arithmetic unit 408 and eight 4-bit / 16-bit data decoders from the 4-bit / 16-bit data decoder 411 to the 4-bit / 16-bit data decoder 418. The eight 4-bit / 16-bit data decoders are connected to eight SEG groups 0 to 7 from SEG group 421 to SEG group 428. Block data 4 bits output from the command interpretation block 400 are connected to each of the eight arithmetic units. Further, in the Offset data 32 bits, 4 bits different from each other such as [3: 0], [7: 4], [11: 8] ... Are connected to eight arithmetic units.

In each of the eight arithmetic units, the block data 4 bits and the Offset data 4 bits are calculated. In the present embodiment, the Offset data 4 bits are subtracted from the block data 4 bits. For example, when the block data is 4 and the Offset data is 1, the value output from the subtractor is 3. If the block data is 0, the value output by subtracting 1 is "1111" = Fh. The values output from the eight arithmetic units are input to the eight 4-bit / 16-bit data decoders, and for example, the input value "0011" becomes "00000000000_00001000". That is, the value in which only the 4th bit is "1" is output. Each of the print data bits 0 to 7 is assigned to the SEG groups 0 to 7.

FIG. 7 is a diagram showing each internal logic configuration from the uppermost SEG group 421 (SEG group 0) to the lowermost SEG group 428 (SEG group 7). Print data and HEAT_PULSE are connected as a common signal to the 3-input AND circuit (each of the 16 AND circuits from the uppermost AND circuit 500 to the lowermost AND circuit 515). Further, different bits of signals bits 0 to 15 from the 4-bit / 16-bit data decoder of FIG. 6 are connected to each of the 16 AND circuits. As the output value from the 4-bit / 16-bit data decoder in FIG. 6 is only 1 bit, a value of '1' is output, so only one of the heat segment 520 at the top and the heat segment 535 at the bottom is output. It becomes a heat state. For example, when the block data is 4, SEG4 is heated, but when the Offset data is 1, SEG3 is heated. As described above, in the present embodiment, the drive timing of the segment is delayed by the offset corresponding to the correction value. At that time, the transmission timing for transmitting data to the recording head 10 is also delayed corresponding to the delay. Further, in the present embodiment, the transmission control of the transmission timing is as shown in FIG. 16 so that the transmission timing to the recording head 10 is delayed by performing the usual 8-bit data reading method. Data is stored in the recording memory 213 of 3.

FIG. 9A is a diagram showing a timing waveform of transmission data being recorded, and FIG. 11 is a flowchart showing a transmission process of block data and print data. The process of FIG. 11 is realized, for example, by the CPU 201 reading and executing the program stored in the ROM 202.

The recording data transfer circuit 219 transmits command + block data and command + print data at each timing of H_LATCH, and transmits block data from 0 to 15 to transmit data for one column. The output signals H_LATCH, H_DATA, and H_CLK from the recorded data transfer circuit 219 are connected to the command interpretation block 400. Further, FIG. 8 is a diagram showing an internal circuit of the command interpretation block 400.

The recording data transfer circuit 219 transmits an H_LATCH signal (S201), and transmits 8-bit command data “10011000” and 4-bit block data (S202, S203). Then, the recording data transfer circuit 219 determines whether or not the transmission of the 4-bit block data is completed (S204). On the other hand, the 8-bit shift register 602 captures H_DATA according to the edge of H_CLK. When 8 bits are taken in, the command interpretation circuit 603 interprets the command of the 8-bit command data.

FIG. 9C is a diagram showing a command and data accompanying the command. For example, if the command is "10011000", the command interpretation block 400 subsequently determines that block data for identifying the drive nozzles in each group will be transmitted. When the command interpretation circuit 603 captures 8 bits of the command data, the command enable is negated so that the data input thereafter is not misinterpreted as a command.

The 4-bit block data is taken into the 32-bit shift register 601. The bit [31:28] of the data captured in the 32-bit shift register 601 is captured in the first 4-bit latch circuit 604 by the block data latch output from the command interpretation circuit 603 (S205). When the 4-bit block data is taken into the first 4-bit latch circuit 604, the command interpretation circuit 603 asserts the command Enable. As a result, the data to be transmitted next can be recognized as a command.

The recording data transfer circuit 219 transmits 8-bit command data "10001000" and 8-bit print data (S206, S207). Then, the recording data transfer circuit 219 determines whether or not the transmission of 8-bit print data is completed (S208). On the other hand, the 8-bit shift register 602 captures H_DATA according to the edge of H_CLK. When 8 bits are taken in, the command interpretation circuit 603 interprets the command of the 8-bit command data.

When the data command is "10001000", as shown in FIG. 9C, the command interpretation block 400 determines that the print data is continuously transmitted. When the command interpretation circuit 603 captures 8 bits of the command data, the command enable is negated so that the data input thereafter is not misinterpreted as a command.

The 8-bit print data is taken into the 32-bit shift register 601. The bit [31:24] of the data captured in the 32-bit shift register 602 is captured in the first 8-bit latch circuit 605 by the print data latch output from the command interpretation circuit 603 (S209). When the 8-bit print data is taken into the first 8-bit latch circuit 605, the command interpretation circuit 603 asserts the command Enable.

The recording data transfer circuit 219 transmits an H_LATCH signal after transmitting 8-bit print data (S210). On the other hand, the data captured in the first 8-bit latch circuit 605 and the first 4-bit latch circuit 604 is the second 4-bit latch circuit 607 and the second 8-bit latch circuit 608 at the timing of H_LATCH transmitted in S210, respectively. Is taken in (S211). After that, it is output from the command interpretation block 400 and used as heat data in the next cycle.

FIG. 9B is a diagram showing a timing waveform of offset data before recording, and FIG. 10 is a flowchart showing a transmission process of offset data. The process of FIG. 10 is realized, for example, by the CPU 201 reading and executing the program stored in the ROM 202.

The recording data transfer circuit 219 transmits an H_LATCH signal (S101), and transmits 8-bit command data “10101000” and 32-bit offset data (S102, S103). Then, the recording data transfer circuit 219 determines whether or not the transmission of the 32-bit offset data is completed (S104). On the other hand, the 8-bit shift register 602 captures H_DATA according to the edge of H_CLK. When 8 bits are taken in, the command interpretation circuit 603 interprets the command of the 8-bit command data.

As shown in FIG. 9C, when the command is "10101000", the command interpretation block 400 determines that the offset data is continuously transmitted. When the command interpretation circuit 603 captures 8 bits of the command data, the command enable is negated so that the data input thereafter is not misinterpreted as a command.

The 32-bit offset data is taken into the 32-bit shift register 601. The bit [31: 0] of the data captured in the 32-bit shift register 601 is captured in the first 32-bit latch circuit 606 by the offset data latch output from the command interpretation circuit 603 (S105). When the 32-bit block data is taken into the first 32-bit latch circuit 606, the command interpretation circuit 603 asserts the command Enable.

The recording data transfer circuit 219 transmits an H_LATCH signal after transmitting 32-bit offset data (S106). On the other hand, the data captured in the first 32-bit latch circuit 606 is captured in the second 32-bit latch circuit 609 at the timing of H_LATCH transmitted in S106 (S107). After that, it is output from the command interpretation block 400 and used as offset data.

FIG. 18 is a diagram showing a state in which data is transmitted for each group in the present embodiment. Since the correction value is 0 in group 0, data is transmitted in order from the nozzle of block 0 to the nozzle of block 15. Since the correction value is 1 in group 1, the data corresponding to the nozzles of block 0 is transmitted when the drive block order is 1. Then, in group 1, the nozzle data of the "drive block order-1" block is continuously transmitted.

Since the correction value is 2 in group 2, the data corresponding to the nozzle of block 0 is transmitted when the drive block order is 2. Then, in group 2, the nozzle data of the "drive block order-2" block is transmitted even after that. Hereinafter, the same applies to groups 3 to 7.

That is, in the present embodiment, the drive timing of the segment is delayed by the offset corresponding to the correction value, and the transmission timing for transmitting data to the recording head 10 is also delayed corresponding to the delay. With such a configuration, even if the drive timing of the recording element is changed, the data transmission order for one column in each group does not change. As a result, the data corresponding to nozzle 0 in each group is always recorded first among the data for one column. As a result, as shown in FIGS. 20A and 20B, it is possible to prevent a remarkable misalignment of dots for one column from occurring in each group.

FIG. 19 is a diagram showing drawing on a paper surface when tilt correction is performed in the present embodiment. In the present embodiment, as shown in FIG. 18, by shifting the recording timing of the nozzles corresponding to the block 0 for each group, it is possible to draw a ruled line without a large step. The step in FIG. 19 is about 1.25 μm (1/16 of one column) when one column is recorded at 1200 dpi.

In this embodiment, a configuration in which a command is transmitted along with the data to be transmitted has been described. With such a command transmission configuration, only necessary data can be transmitted. Therefore, only offset data may be transmitted before recording, and block data and recorded data may be transmitted during recording. As a result, the amount of data to be transmitted during recording can be reduced. Further, since the command is 8 bits, by assigning a command different from the block data, print data, and offset data shown in FIG. 9 (c), for example, data such as temperature control in the subheater and error detection in CRC can be obtained. It can only be sent when needed.

Further, even in the interface with the recording head in the conventional non-command transmission configuration, the offset data may be transmitted in advance, for example, a separate signal line may be provided. Among them, by providing the "mode for transmitting offset data" and the "mode for transmitting block data / print data" required for recording, the same effect as that of the present embodiment can be obtained.

(Other Examples)
The present invention supplies a program that realizes one or more functions of the above-described embodiment to a system or device via a network or storage medium, and one or more processors in the computer of the system or device reads and executes the program. It is also possible to realize the processing. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

10 Recording head: 100 Inkjet recording device: 201 CPU: 206 ASIC: 212 Data sorting circuit: 213 Third recording memory: 219 Recording data transfer circuit

Claims (8)

An inkjet recording device that records on a recording medium with a recording head having a plurality of nozzles.
A plurality of recording elements corresponding to the plurality of nozzles are grouped by recording elements corresponding to adjacent nozzles, and the recording elements grouped as blocks to be driven at the same timing between the groups are time-division-driven for each block. A drive that controls the drive timing of the recording element by the drive means by using the drive means and a correction value for correcting the inclination of the recording head held by the recording head at the time of recording on the recording medium. A recording head having a control means,
Prior to recording on the recording medium, the correction value is transmitted to the recording head, and when recording on the recording medium, a nozzle corresponding to the recording element having the same drive timing as a result of control by the drive control means. The recording data corresponding to the plurality of nozzles and the transmission control means for transmitting the block information to the recording head, which are rearranged so as to be a combination of the recording data corresponding to the above.
The drive control means is based on the drive timing of the recording element corresponding to the head nozzle in the nozzle array in the group, which is obtained by using the information of the block transmitted by the transmission control means and the correction value. Control is performed so as to sequentially delay from the recording element corresponding to the first nozzle to the recording element corresponding to the last nozzle along the direction of the nozzle arrangement.
An inkjet recording device characterized in that. Before Symbol transmission control means, wherein the rearrangement rather based on the correction value, the ink jet recording apparatus according to claim 1, wherein the delaying the transmission timing of the recording data before the rearrangement. The inkjet recording apparatus according to claim 1 or 2 , wherein the drive control means is a circuit composed of an arithmetic unit. The inkjet recording apparatus according to any one of claims 1 to 3 , wherein the correction value is held by a latch circuit. The inkjet recording apparatus according to any one of claims 1 to 4 , wherein the correction value is determined for each group. Performs processing rearrangement of recording data based on the previous SL correction value, processing means for storing the record data processing of the rearrangement has been performed in the storage unit, further comprising a
The transmission control means controls the transmission timing of the recorded data to the recording head by reading the recorded data stored in the storage unit by the processing means and transmitting the recorded data to the recording head.
The inkjet recording apparatus according to any one of claims 1 to 5. The processing means, the so said recording data corresponding to the nozzle drive timing that will be controlled by the drive control means is transmitted to said recording head by said transmission control means, to carry out processing before Symbol rearrangement The inkjet recording apparatus according to claim 6. A control method executed in an inkjet recording device that records on a recording medium by a recording head having a plurality of nozzles.
In the recording head, a plurality of recording elements corresponding to the plurality of nozzles are grouped by recording elements corresponding to adjacent nozzles, and the recording elements grouped as blocks driven at the same timing between the groups are grouped together for each block. The drive process that drives in a time-division manner and
When recording on a recording medium, the recording head controls the drive timing of the recording element in the drive step by using a correction value for correcting the inclination of the recording head held by the recording head. Drive control process and
Prior to recording on the recording medium, the correction value is transmitted to the recording head, and when recording on the recording medium, a nozzle corresponding to a recording element having the same drive timing as a result of control in the drive control step. It has a transmission control step of transmitting the recorded data corresponding to the plurality of nozzles and the information of the block to the recording head, which are rearranged so as to be a combination of the recorded data corresponding to the above.
In the drive control step, based on the drive timing of the recording element corresponding to the head nozzle in the nozzle arrangement in the group, which is obtained by using the information of the block transmitted in the transmission control step and the correction value. Control is performed so as to sequentially delay from the recording element corresponding to the first nozzle to the recording element corresponding to the last nozzle along the direction of the nozzle arrangement.
A control method characterized by that.

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