CN103885734A - Ink-jet head control panel of ink-jet printer and method for transmission of printable data - Google Patents
Ink-jet head control panel of ink-jet printer and method for transmission of printable data Download PDFInfo
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- CN103885734A CN103885734A CN201410129397.4A CN201410129397A CN103885734A CN 103885734 A CN103885734 A CN 103885734A CN 201410129397 A CN201410129397 A CN 201410129397A CN 103885734 A CN103885734 A CN 103885734A
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Abstract
The invention discloses an ink-jet head control panel of an ink-jet printer and a method for transmission of printable data. One end of the ink-jet head control panel is connected with a master control panel and used for receiving serial printed data after the data are processed and the other end of the ink-jet head control panel is connected with ink-jet heads and used for sending the printable data with no error after verification to the ink-jet heads. The ink-jet head control panel mainly comprises an FPGA, a DES, a CAN chip sending end (PHY), a power module and a peripheral control interface unit. The ink-jet head control panel is characterized in that an SDRAM is additionally arranged on the ink-jet head control panel and connected with the FPGA, bi-directional data transmission can be conducted between the SDRAM and the FPGA, and the SDRAM is used for storing the printable data with no error after the data are verified through the FPGA and finally outputting the printable data with no error after verification to at least one ink-jet head for printing. The SDRAM is provided with multiple zones, the number of the zones is identical to that of the ink-jet heads, and the printable data with no error after verification needed by each ink-jet head are stored in the corresponding zone. In the printing process, the stored printable data with no error after verification are sent to the corresponding ink-jet head for image-text printing by the SDRAM, the phenomenon that the data are transmitted to the ink-jet heads mistakenly after printing operation is started can be avoided, the functions of the ink-jet head control panel are completed, and the ink-jetting efficiency is improved.
Description
Technical field
The present invention relates to a kind of inkjet printer head control panel and printable data transmission method, relate to specifically a kind of printable data transmission method that increases the inkjet printer head control panel of synchronous DRAM (SDRAM) and utilize SDRAM.
Background technology
The process of printing of inkjet printer picture and text, normally will be stored in PC main frame as the view data of printing target, this view data comprises image or text, view data is transformed to this view data by raster image processing (RIP) transform data of printable form, and the printable data after RIP is passed to shower nozzle and carried out figure message printing the most at last.Nozzle control panel is the connector circuit board of ink-jet printer control system to shower nozzle, and every kind of shower nozzle all needs the interface circuit of oneself, and its one end connects shower nozzle, and the other end connects master control board.FPGA on nozzle control panel receives the serial print data that master control board sends out, and provides print data, control signal and power drive signal through processes such as processing for shower nozzle.Ink-jet printer is in order to improve the multiple shower nozzle concurrent workings of the general employing of print speed, when working together, multiple shower nozzles need a large amount of print datas, shower nozzle moving of car during to correspondence position shower nozzle can spray corresponding data in relevant position, so the accuracy of data transmission directly has influence on air brushing quality and air brushing efficiency between master control board and nozzle control panel, because the storer internal memory in FPGA is limited, can not once store whole printable data, so in the process that sends to nozzle printing while receive new printable data, if occur that in transmitting procedure data make mistakes midway, the inkjet printing picture and text and the print procedure that have carried out will directly be had influence on.This process cannot the errorless printable data of pre-stored check, if data makeing mistakes in transmitting procedure not only there will be the possibility of ink, medium waste, has improved air brushing cost, also can make printing effect be affected.
Summary of the invention
For above problem, the object of the present invention is to provide a kind of inkjet printer head control panel and printable data transmission method that first printable data errorless verification is carried out to pre-stored and then printable communication to shower nozzle errorless verification is printed.
For achieving the above object, the present invention proposes a kind of inkjet printer head control panel, one end connects master control board, receive serial print data after treatment, the other end connects shower nozzle, printable data errorless verification is sent to shower nozzle, nozzle control panel mainly comprises FPGA, deserializer (DES), CAN chip transmitting terminal (PHY), power module and peripheral control interface unit, it is characterized in that, on nozzle control panel, set up a synchronous DRAM (SDRAM), SDRAM is connected with FPGA, SDRAM and FPGA can carry out bidirectional data transfers, SDRAM is used for storage through the errorless printable data of FPGA verification, and finally export printable data errorless verification at least one shower nozzle and print.
In above-mentioned inkjet printer head control panel, described SDRAM arranges different subregions, and number of partitions is identical with printer head quantity, the errorless printable data of verification that shower nozzle of each subregion corresponding stored is required.
In above-mentioned inkjet printer head control panel, described DES is used for the serial print data of reception to change into parallel print data, and low-voltage differential signal is converted into single-ended signal.
In above-mentioned inkjet printer head control panel, described serial print data is through LVDS(low-voltage differential signal) transmission line is to nozzle control panel.
In above-mentioned inkjet printer head control panel, described FPGA is numbered disappearance verification and cyclic redundancy check (CRC) (CRC check) to the parallel print data after DES transforms.
In above-mentioned inkjet printer head control panel, described FPGA feeds back to master control board by PHY through CAN bus by verification report, if verification is wrong, master control board resends serial print data to nozzle control panel; If verification is errorless, master control board continues to send new serial print data to nozzle control panel.
The present invention proposes a kind of ink-jet printer printable data transmission method, it is characterized in that, the step of printable data transmission is specially: a) master control board transfers to serial print data after treatment the DES of nozzle control panel; B) serial print data is changed into parallel print data by the DES of nozzle control panel, and parallel print data is transferred to the FPGA on nozzle control panel; C) FPGA carries out verification to parallel print data, if parallel print data is wrong, feeds back wrong report and notifies master control board to resend serial print data and continue verification; If parallel print data is errorless, be the errorless printable data of verification, the errorless printable data of verification is stored in the SDRAM of nozzle control panel, feeds back errorless report simultaneously and notifies master control board to continue to send new serial print data and carry out verification; D) program is sent print command, and SDRAM is sent at least one shower nozzle by printable data errorless verification and prints.
In above-mentioned printable data transmission method, in described step a) serial print data after treatment through LVDS transmission line the DES to nozzle control panel; In described step c), wrong report or errorless report feed back to master control board by the PHY of nozzle control panel through CAN bus.
The present invention sets up a SDRAM on nozzle control panel, for storing the printable data errorless through FPGA verification, SDRAM is divided into some subregions simultaneously, number of partitions is consistent with printer head quantity, and the errorless printable data of verification that shower nozzle of each subregion corresponding stored is required, SDRAM sends to shower nozzle to carry out figure message printing the printable data errorless verification of storage again, can avoid causing data after nozzle printing in the time passing to shower nozzle, to occur mistake, improve nozzle control panel function, improve air brushing efficiency.In the time starting to print, programmed control sends print command, sends the printable data errorless verification having accumulated in advance in SDRAM to shower nozzle, can guarantee that data supply in time.In print procedure, in the time that printing picture and text do not cover whole print media situation completely, the gap of not spraying picture and text at shower nozzle, SDRAM can continue to store the errorless printable data of verification, accumulates more printable data to improve transfer efficiency.
Accompanying drawing explanation
Fig. 1 is data transfer model basic composition block diagram in the present invention;
Fig. 2 is the block scheme of the main dispensing unit of nozzle control panel in the embodiment of the present invention;
Fig. 3 is SDRAM internal zone dividing and the shower nozzle corresponding relation schematic diagram of nozzle control panel in the embodiment of the present invention;
Fig. 4 is the process flow diagram of nozzle control panel control print procedure in the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 is the basic composition block diagram of data transfer model in the present invention, in the time that data send, PC is sent to master control board by direct memory access (dma mode) the print data after raster image processing (RIP), master control board is PCIE plate, master control board comprises storer (SDRAM1), programmable logic device (FPGA1), transmitting terminal and receiving end, SDRAM1 is sent to the print data after the RIP of reception the FPGA1 of master control board, FPGA1 is transferred to data processing the transmitting terminal of master control board again, transmitting terminal transfers parallel data to serial data, single-ended signal is converted into LVDS differential signal simultaneously, serial print data after conversion is passed to the deserializer (DES) of printer head control panel through LVDS transmission line, serial print data is converted into parallel print data by DES, and LVDS differential signal is converted into single-ended signal, again parallel print data is sent in the FPGA on nozzle control panel, because parallel print data amount is huge, FPGA internal storage can not be stored whole parallel print datas, FPGA receives parallel print data on one side, carry out parallel print data and whether transmit wrong verification, be sent in synchronous DRAM (SDRAM) starting to receive the also errorless printable data of verification on one side, continue the parallel print data of reception and verification new incoming to vacate space new in FPGA.The errorless printable data of verification in SDRAM and the FPGA of nozzle control panel can be carried out transmitted in both directions.If the parallel print data of verification is wrong, software control feeds back to printer master control board by CAN chip transmitting terminal (PHY) through CAN bus by wrong report, and master control board resends serial print data to nozzle control panel and carries out verification; If the parallel print data of verification is errorless, software control will feed back to printer master control board by CAN chip transmitting terminal (PHY) through CAN bus without error signal, and master control board continues to send new serial print data to nozzle control panel and carries out verification.Send after print command when program, the errorless printable data of verification of storing in the SDRAM of nozzle control panel spreads out of to be passed to one or more shower nozzles through FPGA again and carries out figure message printing.
Fig. 2 is the block scheme of the main dispensing unit of nozzle control panel in the embodiment of the present invention, and the main dispensing unit of nozzle control panel comprises FPGA, deserializer (DES), CAN chip transmitting terminal (PHY), SDRAM, power module and peripheral control interface unit.Master control board is sent to nozzle control panel with LVDS differential signal form through LVDS transmission line by serial print data after treatment, and the DES on nozzle control panel changes into the serial print data of reception parallel print data, changes into single-ended signal by LVDS differential signal; FPGA is used for receiving the parallel print data after DES transforms, and parallel print data is stored and verification temporarily, thereby provides the information such as data, waveform, ink supply, heating for print procedure; CAN chip transmitting terminal (PHY) is for sending to master control board by the result of FPGA verification; SDRAM is for storing the errorless printable data of verification, and the errorless printable data of verification that SDRAM stores is the most at last sent to shower nozzle through FPGA again and prints; Power module provides power supply for nozzle control panel; The work of peripheral control interface unit controls pump, black valve, liquid level indication etc.
Some subregions are set in the SDRAM of nozzle control panel, the quantity of subregion is consistent with the quantity of printer head, the required errorless printable data of verification of a certain shower nozzle of corresponding stored in each subregion, as shown in Figure 3, take an ink-jet printer with four shower nozzles as example, in SDRAM, correspondence arranges four subregions and deposits respectively four errorless printable data of verification that shower nozzle is required, i.e. the first subregion, the second subregion, the 3rd subregion, the 4th subregion, pass in the process that shower nozzle prints in the printable data that verification is errorless, the print data of the first shower nozzle comes from the first subregion, the print data of the second shower nozzle comes from the second subregion, the print data of the 3rd shower nozzle comes from the 3rd subregion, the print data of the 4th shower nozzle comes from the 4th subregion.
Next the process of nozzle control panel execution print processing is described, as shown in Figure 4, at step S1, serial print data through processing after FPGA reception RIP in nozzle control panel, data exist with the form of some data lines, i.e. the first data line, the second data line, the 3rd data line, the 4th data line etc., data line comprises wardrobe information and row print data information, wardrobe information comprises line number, as 0, 1, 2, 3, by that analogy, wardrobe information also comprises corresponding sub-shower nozzle sequence number, for judging which shower nozzle this data line is transferred to for printing, row print data information control the graph text information that nozzle printing is corresponding.In step S2, FPGA judges according to data line numbering whether data line exists loss, line number should be continuous nonnegative integer, data line should import in FPGA successively with serial number, if judge, line number is discontinuous and have loss, feeds back this journey data occur mistake and by this data line deletion, perform step S7 by PHY through CAN bus, master control board resends this data line to nozzle control panel, continues to carry out the step of S1 ~ S2; If detecting the line number of data line does not lose continuously, after receiving full line data, execution step S3, carries out CRC check to data row, and judges that whether the print data information in data line is correct, be step S4, if CRC check data are made mistakes, wrong report is fed back to master control board and this data line is deleted through CAN bus by PHY, execution step S7, resend this data line to nozzle control panel by master control board, continue to carry out the step of S1 ~ S4; If CRC check data are correct, execution step S5, is sent to this data line in SDRAM and stores, and in storing process, according to sub-shower nozzle sequence number corresponding in wardrobe information, this data line is stored in the SDRAM subregion that sub-shower nozzle is corresponding.After program is sent print command, execution step S6, SDRAM spreads out of the errorless printable data that completes the verification of wardrobe checksum CRC of storage to shower nozzle through FPGA, the errorless printable data of verification is passed to corresponding shower nozzle according to different subregions in SDRAM and is carried out print job, until print out task finishes.
The quantity that it is pointed out that shower nozzle determines by printer configuration, and the subregion in the SDRAM of nozzle control panel only need be corresponding with shower nozzle quantity, and the present invention is to printer head quantity unrestricted.
It is to be noted and any distortion of making according to the specific embodiment of the present invention all do not depart from the scope that spirit of the present invention and claim are recorded.
Claims (8)
1. an inkjet printer head control panel, one end connects master control board, receive serial print data after treatment, the other end connects shower nozzle, printable data errorless verification is sent to shower nozzle, nozzle control panel mainly comprises FPGA, deserializer (DES), CAN chip transmitting terminal (PHY), power module and peripheral control interface unit, it is characterized in that, on nozzle control panel, set up a synchronous DRAM (SDRAM), SDRAM is connected with FPGA, SDRAM and FPGA can carry out bidirectional data transfers, SDRAM is used for storage through the errorless printable data of FPGA verification, and finally export printable data errorless verification at least one shower nozzle and print.
2. inkjet printer head control panel as claimed in claim 1, is characterized in that, described SDRAM arranges different subregions, and number of partitions is identical with printer head quantity, the errorless printable data of verification that shower nozzle of each subregion corresponding stored is required.
3. inkjet printer head control panel as claimed in claim 1, is characterized in that, described DES is used for the serial print data of reception to change into parallel print data, and low-voltage differential signal is converted into single-ended signal.
4. inkjet printer head control panel as claimed in claim 1, is characterized in that, described serial print data is through LVDS(low-voltage differential signal) transmission line is to nozzle control panel.
5. inkjet printer head control panel as claimed in claim 1, is characterized in that, described FPGA is numbered disappearance verification and cyclic redundancy check (CRC) (CRC check) to the parallel print data after DES transforms.
6. inkjet printer head control panel as claimed in claim 1, is characterized in that, described FPGA feeds back to master control board by PHY through CAN bus by verification report, if verification is wrong, master control board resends serial print data to nozzle control panel; If verification is errorless, master control board continues to send new serial print data to nozzle control panel.
7. an ink-jet printer printable data transmission method, is characterized in that, the step of printable data transmission is specially: a) master control board transfers to serial print data after treatment the DES of nozzle control panel; B) serial print data is changed into parallel print data by the DES of nozzle control panel, and parallel print data is transferred to the FPGA on nozzle control panel; C) FPGA carries out verification to parallel print data, if parallel print data is wrong, feeds back wrong report and notifies master control board to resend serial print data and continue verification; If parallel print data is errorless, be the errorless printable data of verification, the errorless printable data of verification is stored in the SDRAM of nozzle control panel, feeds back errorless report simultaneously and notifies master control board to continue to send new serial print data and carry out verification; D) program is sent print command, and SDRAM is sent at least one shower nozzle by printable data errorless verification and prints.
8. printable data transmission method as claimed in claim 7, is characterized in that, in described step a) serial print data after treatment through LVDS transmission line the DES to nozzle control panel; In described step c), wrong report or errorless report feed back to master control board by the PHY of nozzle control panel through CAN bus.
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