CN100419665C - Printing control device - Google Patents
Printing control device Download PDFInfo
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- CN100419665C CN100419665C CNB2003101157473A CN200310115747A CN100419665C CN 100419665 C CN100419665 C CN 100419665C CN B2003101157473 A CNB2003101157473 A CN B2003101157473A CN 200310115747 A CN200310115747 A CN 200310115747A CN 100419665 C CN100419665 C CN 100419665C
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- laser beam
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- control card
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Abstract
The present invention relates to a printing control device for controlling a multi-laser beam machine core. The multi-laser beam machine core simultaneously receives multiple rows of video lines in a laser beam detecting signal. The printing control device comprises a control card and a switching module, wherein the control card is used for receiving printing data transmitted from a terminal, the printing data is made into printing blocks to be sent to the multi-laser beam machine core in a video-line form, and then a row of video lines are sent in a row of synchronizing signals; one end of the switching module is connected with the control card, the other end is connected with the multi-laser beam machine core, the signals of the control card and the multi-laser beam machine core are matched with each other through signal frequency multiplications on both ends, and then the multi-laser beam machine core is controlled.
Description
Technical field
The present invention relates to laser printer, relate in particular to the print control unit of laser printer.
Background technology
Laser printer is an electronic imaging system, at first, movement can receive video (VIDEO) signal from main controller, send laser instrument then to, laser instrument gives off laser beam according to the video control of transmitting, ' 0 ' corresponding point is not sent out laser beam, ' 1 ' corresponding some emission of lasering beam, laser regular hexagon reflective mirror wherein at the uniform velocity rotates, every the limit becomes a sweep trace with the laser beam reflection, sweep trace scans photosensitive drums, owing to have laser to penetrate corresponding to ' 1 ' point in the video data in the sweep trace, photosensitive drums sensitization and conducting electricity, ink powder is filled with negative charge in advance, thereby can be under the effect of internal electric field, move to photosensitive drum surface along the galvanic circle, and do not have laser to penetrate corresponding to ' 0 ' point in the video data in the sweep trace, thus photosensitive drums and non-conductive, thereby the point of these data correspondences do not have ink powder to be adsorbed up, so just becomes latent electronic image.To warm-up mill, here ink powder is by high temperature melting with sheet movement for latent electronic image, thereby and is pressed into paper forms permanent image under the effect of pressure roll.Follow-up printer still has some cleanings, thereby finishes print procedure one time.
At present, laser printer is divided into single laser beam printer and multi-laser beam printer.Laser printer adopts single laser beam, and when just thinking that promptly movement provides laser beam detection (/BD, Beam Detect) signal, control card transmits the Video of delegation signal to movement; And multi-laser beam just think exactly movement provide/during the BD signal, control card transmits multirow Video signal to movement.Thereby as can be seen, contrast is under identical pixel synchronous clock frequency, and the N laser beam can improve N doubly than single laser beam in the resolution of page orientation, in other words, under the situation of identical resolution, the N laser beam can be reduced to 1/N than the synchronous clock frequency of single laser beam doubly.Make control card aspect electromagnetic interference (EMI), all can improve significantly like this, thereby the reliability of complete machine is improved greatly.
Movement in the market almost all is single laser beam, but the movement of double laser beam comes out, because the clear superiority of multi-laser beam movement is believed very soon and can be appeared on the market.In addition, present control card is primarily aimed at the movement of single laser beam to the control method that movement adopts, so how to control the multi-laser beam movement, is the problem that needs solution at present.
Summary of the invention
The problem that the present invention solves provides a kind of print control unit, realizes the control of multi-laser beam movement.
For addressing the above problem, print control unit of the present invention, be used to control the multi-laser beam movement, this multi-laser beam movement is while parallel receive multi-line video line in a laser beam detection signal, this print control unit comprises: control card, be used to receive the print data that sends from terminal, and make printing block and send to the multi-laser beam movement, in a line synchronizing signal, send delegation's video line with the video line form; Interconnecting module, described interconnecting module further comprises: the control card interface is connected with control card; The movement interface is connected with the multi-laser beam movement; Clock port for the multi-laser beam movement provides synchronizing clock signals, mates the signal of control card and multi-laser beam movement by the two ends signal frequency multiplication mutually, realizes the control of multi-laser beam movement.
The multi-laser beam movement comprises following signal port: start-print, laser beam detection, paper top and the input of n road video data; The corresponding multi-laser beam movement of control card correspondence is provided with following signal port: printout, row synchronously, field synchronization, the output of k road video data, this control card also is provided with video output synchronous clock; Interconnecting module comprises the crystal oscillator port, the audio video synchronization clock frequency that the frequency of this crystal oscillator needs for the multi-laser beam movement, this interconnecting module be used for the signal n frequency multiplication of laser beam detection export to row synchronously and make the signal frequency of video output synchronous clock equal crystal oscillator frequency n/k doubly; Wherein, the signal of start-print and printout is same signal; The signal of paper top and field synchronization is same signal.
The control card interface comprises the signal port that docks one by one with the signal port of control card: printout switching, row synchronous switching, field synchronization switching, k road video data output switching and the switching of video output synchronous clock; The movement interface comprises the signal port that docks one by one with the signal port of multi-laser beam movement: start-print switching, laser beam detection switching, the switching of paper top and n video data input switching; The signal of row synchronous switching equal laser beam detection switching signal n doubly, the frequency n/k that the signal frequency of video output synchronous clock switching equals crystal oscillator is doubly; The signal of the signal of start-print switching and printout switching is same signal, and start-print directly is connected with printout; The signal of the signal of paper top switching and field synchronization switching is same signal, and the paper top directly is connected with field synchronization.
Interconnecting module also is provided with the buffer zone that is used for depositing the video line that control card sends, and video line all receives, and sends the multi-laser beam movement again to.When the multi-laser beam movement received the capable video line of n, interconnecting module was provided with 2n buffer zone.Interconnecting module can combine with control card.
Compared with prior art, the present invention has the following advantages:
Print control unit of the present invention has been realized the control to the multi-laser beam movement;
Increasing along with multi-laser beam movement (typical as the double laser beam movement), print control unit of the present invention will directly bring economic benefit.
Description of drawings
Fig. 1 is the synoptic diagram of prior art print control unit.
Fig. 2 is the synoptic diagram of print control unit of the present invention.
Embodiment
Please refer to shown in Figure 1ly, Fig. 1 is the synoptic diagram of prior art print control unit, promptly is directed to single laser beam printer.
This print control unit mainly comprises: control card 1, single laser beam movement 2 of being controlled by control card 1 reach the oscillator 3 that time clock is provided for control card 1.
Control card 1, be used for receiving print data from PC holds or other devices send, be reduced into bitmap then, again bitmap is made printing block (Band), send to single laser beam movement 2 then, comprise that following signal port: PRINT (printout), LSYNC (row synchronously), FSYNC (field synchronization), VIDEO0:(video data export 0 the tunnel) and VCLKIN (video output synchronous clock is connected with oscillator 3).
Single laser beam movement 2, control single laser beam movement 2 according to the control signal of control card 1 and carry out corresponding operation, comprise following signal port :/START (start-print) ,/BD (laser beam detection) ,/TOP (paper top) and/VDO (video data input).
This list laser beam movement 2 has output board (not shown), its function be receive the control signal that sends from control card 1 (as/START) or video data (VIDEO), thereby control mechanical driving part regular event (at the uniform velocity turns round as the control step motor, laser instrument normal transmission laser beam, the heater strip of fixation unit heats by control law etc.), output board also is responsible for receiving the state that returns from each sensor, all the sensors all links to each other with output board, be responsible for passing back the state (whether be opened as top cover, fan is stall etc. whether) of each mechanical part or electric component.Output board, low pressing plate (also be power panel, the various DC voltage that provide each electric component required are provided), hardboard (being used for to the heater strip heating) add that all mechanical driving parts and shell are referred to as movement.
Please continue with reference to Fig. 1, the signal port of control card 1: PRINT (printout), LSYNC (row synchronously), FSYNC (field synchronization), VIDEO0 respectively with the signal port of single laser beam movement 2 :/START (start-print) ,/BD (laser beam detection) ,/TOP (paper top) and/VDO (video data input) sets up unidirectional the connection, wherein the PRINT signal port sends the printout signal to/START signal port, as print start signal; / BD signal port sends the laser beam detection signal to the LSYNC signal port, as line synchronizing signal; / TOP signal port sends field sync signal to FSYNC; The VIDEO0 signal port sends video data to/VDO signal port in the mode of video line.The Control work flow process of existing 1 pair of single laser beam movement 2 of simple declaration control card is as follows:
Control card 1 workflow is as follows: when control card 1 is ready to first Band in the video data; Send PRINT signal (low level is effective) and give single laser beam movement 2; Wait on the FSYNC signal port and significant level (in the present embodiment, low level is effective) occurs; After receiving the FSYNC useful signal, wait on the LSYNC signal port significant level (in the present embodiment, low level is effective) occurring; Whenever receive a LSYNC signal then, send delegation's video line, finish until whole transmission of whole Band from the VIDEO0 signal port.In general, one page can be divided into several Band, and a Band has a lot of video lines, is convenient to control like this.
Single laser beam movement 2 principle of work are as follows: single laser beam movement 2 receives/print start signal of START signal port after, send one/TOP signal (in the present embodiment, low level is effective), be used for notifying control card 1 single laser beam movement 2 to be ready to receive whole Band; In the process that receives whole Band ,/TOP signal remains effectively (in the present embodiment, low level is effective); Then, single laser beam movement 2 can send one/BD signal (in the present embodiment, low level is effective), prepares to receive delegation's video line of current Band in order to notice control card 1 single laser beam movement 2.
By above-mentioned principle as seen, send delegation's video line owing to receive a LSYNC signal on the control card 1, only need carry out that signal connects the printing control that can finish single laser beam movement 2 between simple signal port according to Fig. 1 so realize the control of single laser beam on the hardware environment.The difference of multi-laser beam movement 5 and single laser beam movement 2 be provided with some video data input ports (being the n road in the present embodiment) :/VDO1 ,/VDO2.../VDOn;
Based on the prior art scheme, print control unit of the present invention is realized the control of multi-laser beam movement 5, comprises control card 4 and control card 4 and multi-laser beam movement 5 are set up the interconnecting module 6 of data interaction.
Control card 4, be used for receiving print data from PC holds or other devices send, be reduced into bitmap then, again bitmap is made printing block (Band), send to multi-laser beam movement 5 then, comprise following signal port: PRINT (printout), LSYNC (row is synchronously), FSYNC (field synchronization), VIDEO0～k-1:(k road video data output) and VCLKIN (video output synchronous clock).
Interconnecting module 6 is used for control card 4 and multi-laser beam movement 5 are set up data interaction, comprises control card interface 62 that is connected with each signal port of control card 4 and the movement interface 63 that is connected with each signal port of multi-laser beam movement 5.This interconnecting module 6 can be integrated with control card 4, also can individualism.
Control card interface 62 comprises the signal port that signal port following and control card 4 docks one by one: C_PRINT (printout switching), C_LSYNC (row synchronous switching), C_FSYNC (field synchronization switching), C_VIDEO0～k-1:(k road video data output switching) and C_VCLKIN (switching of video output synchronous clock).In addition, also be provided with CLKIN (crystal oscillator port), be connected with oscillator 3.
Movement interface 63 comprises the signal port that signal port following and multi-laser beam movement 5 docks one by one: E_START (start-print switching), E_BD (laser beam detection switching), E_TOP (switching of paper top) and E_VDO1～n (video data input switching)
Specific implementation is as follows:
At first since multi-laser beam movement 5 send/the BD signal after, need the capable video line of n, and control card 4 is received a LSYNC signal and is only sent out delegation's video line, directly general/BD links to each other with LSYNC and can not meet the demands, by supplydemand relationship as can be seen, general/BD signal n frequency multiplication is exported to LSYNC and is got final product, i.e. fC_LSYNC=n * fE_BD;
The frequency of crystal oscillator is the audio video synchronization clock frequency that multi-laser beam movement 5 requires, because control card 4 can be supported the output of parallel k position, again because in one/BD, need to fill up the capable video line of n, so the frequency of VCLKIN should be n/k times of CLKIN, i.e. fC_VCLKIN=n/k * fCLKIN;
When being band, the width of each band (being the line number of video line) should guarantee it is the integral multiple of n, just FSYNC directly can be connected with/TOP on the hardware like this, and promptly E_TOP and C_FSYNC are same signals;
PRINT directly is connected with/START and gets final product, and promptly E_START and C_PRINT are same signals;
Comprise also in the interconnecting module 6 that n FIFO (buffer zone of first in first out, not shown) is used for depositing the capable video line of n that control card 4 sends at least, have only when the capable video line of n all to receive, just can send multi-laser beam movement 5 to.Adopt 2n FIFO than more efficient, such one group when control card 4 receives data, multi-laser beam movement 5 has been carried out and just data have been sent to another group.So just realized the data of multi-laser beam movement 5 are transmitted control by hardware.
Interconnecting module among the present invention is realized frequency multiplication, the design of frequency dividing circuit and the design of FIFO with field programmable gate array (FPGA), uses VHDL language design FPGA, and VHDL is the hardware description language of international standard, and the code efficiency height is portable strong.
In sum, print control unit of the present invention has been realized the control to the multi-laser beam movement; Increasing along with multi-laser beam movement (typical as the double laser beam movement), print control unit of the present invention will directly bring economic benefit.
Claims (6)
1. a print control unit is used to control the multi-laser beam movement, and this multi-laser beam movement is while parallel receive multi-line video line in a laser beam detection signal, and this print control unit comprises:
Control card is used to receive the print data that sends from terminal, and makes printing block and send to the multi-laser beam movement with the video line form, sends delegation's video line in a line synchronizing signal;
It is characterized in that,
This print control unit also comprises interconnecting module, and described interconnecting module further comprises:
The control card interface is connected with control card;
The movement interface is connected with the multi-laser beam movement;
Clock port, for the multi-laser beam movement provides synchronizing clock signals,
By the two ends signal frequency multiplication signal of control card and multi-laser beam movement is mated mutually, realize the control of multi-laser beam movement.
2. print control unit as claimed in claim 1 is characterized in that,
The multi-laser beam movement comprises following signal port: start-print, laser beam detection, paper top and the input of n road video data;
The corresponding multi-laser beam movement of control card correspondence is provided with following signal port: printout, row synchronously, field synchronization, the output of k road video data, this control card also is provided with video output synchronous clock;
Clock port is the crystal oscillator port, the audio video synchronization clock frequency that the frequency of this crystal oscillator needs for the multi-laser beam movement, this interconnecting module be used for the signal n frequency multiplication of laser beam detection export to row synchronously and make the signal frequency of video output synchronous clock equal crystal oscillator frequency n/k doubly;
Wherein, the signal of start-print and printout is same signal;
The signal of paper top and field synchronization is same signal.
3. print control unit as claimed in claim 1 is characterized in that,
The control card interface comprises the signal port that docks one by one with the signal port of control card: printout switching, row synchronous switching, field synchronization switching, k road video data output switching and the switching of video output synchronous clock;
The movement interface comprises the signal port that docks one by one with the signal port of multi-laser beam movement: start-print switching, laser beam detection switching, the switching of paper top and n video data input switching;
The signal of row synchronous switching equal laser beam detection switching signal n doubly,
The signal frequency of video output synchronous clock switching equals frequency n/k times of crystal oscillator;
The signal of the signal of start-print switching and printout switching is same signal, and start-print directly is connected with printout;
The signal of the signal of paper top switching and field synchronization switching is same signal, and the paper top directly is connected with field synchronization.
4. print control unit as claimed in claim 1 is characterized in that, interconnecting module also is provided with the buffer zone that is used for depositing the video line that control card sends, and video line all receives, and sends the multi-laser beam movement again to.
5. print control unit as claimed in claim 4 is characterized in that, when the multi-laser beam movement received the capable video line of n, interconnecting module was provided with 2n buffer zone.
6. print control unit as claimed in claim 5 is characterized in that interconnecting module and control card combine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101157473A CN100419665C (en) | 2003-11-28 | 2003-11-28 | Printing control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101157473A CN100419665C (en) | 2003-11-28 | 2003-11-28 | Printing control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1622027A CN1622027A (en) | 2005-06-01 |
| CN100419665C true CN100419665C (en) | 2008-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101157473A Expired - Fee Related CN100419665C (en) | 2003-11-28 | 2003-11-28 | Printing control device |
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| Country | Link |
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| CN (1) | CN100419665C (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311871A (en) * | 1998-07-28 | 2001-09-05 | 莱克斯马克国际公司 | Laser printer having variable beam spacing |
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2003
- 2003-11-28 CN CNB2003101157473A patent/CN100419665C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311871A (en) * | 1998-07-28 | 2001-09-05 | 莱克斯马克国际公司 | Laser printer having variable beam spacing |
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| CN1622027A (en) | 2005-06-01 |
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Granted publication date: 20080917 Termination date: 20201128 |