JPH02262769A - Color picture recorder - Google Patents

Abstract

PURPOSE:To achieve the satisfactory color reproducing with no color slipping when a color picture is reproduced by providing an adjusting means to manually adjust the image form timing of respective image forming units. CONSTITUTION:When power supply is applied to a color picture recorder, electrification or rotary driving is executed to a laser beam scanner 14 of respective printer mechanism I-IV and other required process equipments and the device executes warming-up operation. A laser is turned on and a scanner reaches a prescribed revolving speed. Then, in a state that a fixing roller reaches a prescribed temperature, a main printer is turned to a preparation completing state. When an operator inserts transfer paper P as a member to be recorded on a paper feeding guide 51 of a paper feeding mechanism 5, the tip part of the paper is detected by a first photo-interrupter 52, which is provided in front of a resist roll 53, and a start signal (the start signal of a print sequence) is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a color image recording apparatus, and more particularly to a color image recording apparatus that reproduces colors by sequentially forming images of a plurality of colors on a recording material.

2. Description of the Related Art An apparatus has been proposed that reproduces a color image by recording an image on a recording material using, for example, cyan, agenta, yellow, and black ink according to each color image signal obtained by color separation.

In such an apparatus, images are recorded using four color inks, each ink being superimposed on a recording material. Therefore, if the image recording position (timing) is shifted for each of the 11 colors, the reproduced color image will also be distorted, and accurate color reproduction will not be achieved.

Purpose of the Invention In view of the above points, the present invention provides a color image recording apparatus that achieves good color reproduction without color shift.

Embodiment FIG. 1 shows an example of a color image recording apparatus, and the apparatus of this embodiment is a color laser beam printer (color laser beam printer) having four sets of electrophotographic laser beam printer mechanisms built in as a plurality of sets of image forming mechanisms. In other words, 1 is the main machine box of the device, and I, II-1, and IV are four sets of laser beams 1 to 4 sequentially arranged from right to left in the drawing. This is a printer mechanism (hereinafter simply referred to as a printer mechanism).

3.4 is the diagonally lower right side of the first printer mechanism I and the fourth
A pair of belt drive rollers are disposed diagonally below and to the left of the printer mechanism (2), and are driven to rotate with high precision around rotating shafts 4', 3' by a drive source (motor) not shown. A screen belt 2 is suspended around the belt drive roller 3.4. This screen belt 2 is made of, for example, Tetron mesh, and has drive rollers 3,
4 to move in the direction of the arrow shown. A photointerrupter 19 detects the seam of the screen belt 2.

Reference numeral 5 denotes a paper feeding mechanism disposed on the right side of the main machine box, which carries recording materials such as paper manually fed by an operator into the printer mechanism at a predetermined timing. Also,
Reference numeral 6 denotes an image fixing device disposed on the left end side, 7 an outlet for discharging printed recording material to the outside of the machine, and 18 a tray for storing the recording material.

Since each of the printer mechanisms 1 to (2) has substantially the same mechanical configuration, the configuration of the printer mechanism (2) will be explained here by taking the printer mechanism (2) as an example. That is, each printer mechanism includes a drum-type electrophotographic photoreceptor 9 (hereinafter simply referred to as a drum) as a recording medium that is rotationally driven in the direction of the arrow around a shaft 8, and a drum-type electrophotographic photoreceptor 9 (hereinafter simply referred to as a drum) that is rotated around the drum 9 in the direction of rotation of the drum. Arranged primary charger 10, developer 11, transfer discharger 12, and IJ
- a laser beam scanner 14 disposed above the drum 9, and the like.

The laser beam scanner 14 is composed of a semiconductor laser, a polygon mirror, an f-theta lens, a light shielding plate, etc., and receives the input of a time-series electric digital pixel signal S calculated and output from an image reading device or computer (not shown in the figure). , a beam L modulated in accordance with the signal is emitted, and the surface of the drum 9 charged by the primary charger 10 is scanned in the direction of the drum generatrix to expose the drum surface, thereby removing electrostatic potential on the drum. form an image.

However, the developer 11 of the first printer mechanism 1 is loaded with yellow Y developer, and the second one is loaded with magenta M developer.
The third container contains all the cyan C developer, and the fourth container contains the black BK developer. The laser beam scanner 14 of the first printer mechanism I receives a pixel signal 5 (Y) corresponding to the yellow component image of the color image, and the second mechanism ■ receives a signal S (M) corresponding to the magenta component image. ), a signal 5 (C) corresponding to the cyan component image is input to the third mechanism I, and a signal 5 (BK) corresponding to the black component image is input to the fourth mechanism IV.

Note that the order of colors in this printer mechanism is not limited to this, and it is preferable to adopt an order suitable for color reproduction.

When the power is turned on to the apparatus, the laser beam scanner 14 of each printer mechanism 1 to (2) and other necessary process equipment are energized or rotated, and the heater of the fixing device 6 is energized, etc. The device will warm up. Then, when the laser is turned on, the scanner reaches a predetermined number of revolutions, and the fixing roller reaches a predetermined temperature, the printer device becomes ready.

The transfer paper pl operator as the recording member is fed by the paper feed mechanism 5.
When the paper is inserted onto the paper feed guide 51, its leading end is detected by the first photo interrupter 52 provided in front of the registration roller 53, and a start signal (print sequence start signal) is generated. In response to this start signal, the drums 9 of each of the printing mechanisms 1 to (2) start rotating. Further, the drive roller 3.4 is also driven at the same time, and the screen belt 2 also begins to move.

The transfer paper P is fed by a paper feed roller 53 consisting of a pair of rollers, a paper feed guide 55, and a registration roller 5 consisting of a pair of rollers.
6. The paper passes through the paper feed guide 57 and is sent onto the moving screen belt 2. The transfer paper P carried onto the screen belt is corona charged by the attraction charger 59 and fixedly attracted onto the screen belt 2 . A guide 58 made of a conductive material and connected to the ground is provided as a counter electrode of the attraction charger 59 via the screen belt 2.

When the leading edge of the transfer paper P interrupts the photointerrupters 60Y, 60M, and 60C1608K provided for each printer mechanism, image formation on each drum 9 of each printer mechanism I to (2) is sequentially started in response to that signal. That is, on the drum 9 surface of the first printer mechanism 1, there is a yellow version image as a color component of a color image, on the second one, the same magenta version image, on the third one, the same cyan version image, and on the fourth one. Each parfocal image is formed separately. Since the image forming principles of each printer mechanism are already well known, their explanation will be omitted.

The transfer paper P is conveyed in the direction of the fixing device 6 by the rotation of the rotating member 2, passing through the lower parts of the first to fourth printer mechanisms 1 to A yellow image is formed on the same side of the transfer paper P by the electric discharge device 12, a yellow image is formed on the drum 11 surface of the printing mechanism (1), the same magenta image is formed on the second mechanism (1), and the same image is formed on the third mechanism (■). The cyan image and the parfocal image of the fourth mechanism +V are sequentially superimposed and transferred to form a composite color image on the paper surface. When the transfer paper P passes through the fourth printer mechanism (2), the static electricity is removed by a static eliminator 61 to which an AC voltage is applied, and the electrostatic adhesion to the screen belt 2 is released, so that the transfer paper P is separated from the screen belt 2.

The transfer paper P, which has been released from electrostatic adsorption, rides on the separating claw 15 and is led into the fixing device 6, where the formed color image is fixed by heat and pressure, and is output from the lower part of the machine as a color image print. It is discharged onto the tray 18.

After the transfer paper P is discharged outside the machine, all drives except for the fixing device 6 are stopped, and one cycle of the print sequence is completed.

60Y, 60M160C, 60BK are the 5th to 7th 7-interrupters disposed between each mechanism on the movement path of the transfer paper P to the first to fourth printer mechanisms ■ to ■. Its role is to detect the tip and individually determine the timing to start image formation for each mechanism.

62 and 63 are tension rollers for applying tension to the screen, 62 is rotatable but its position is fixed, and 63 is rotatable, and
It can swing in the direction of the arrow.

Next, a signal processing system for causing the first illustrated apparatus to perform an image recording operation will be described.

FIG. 2 is an example of a system using the recording apparatus shown in FIG. The three-color image signals of red, R, green, and blue B formed by color separation by the three-tube color TV camera 100 are analog-to-digital (A/D) converted into digital signals of predetermined bits to form a three-color frame, Memory 01 is restored. At this time, this image information can be monitored on a monitor 102 such as a color TV or the like. This frame memory 10
1 is connected to the combiator 105, and the memory 01
Processing and conversion of the data, such as gamma correction and massing, are performed by operating the combinator 105. flame.

The data in the memory 101 is output from the printer side and output to the color display LBP 106.

FIG. 3 shows an example of the configuration of the S-P 104 shown in FIG. , G) 109C; more binary, video data output 11
Convert to 1. At this time, in order to output a color image with halftones, a dither method, which will be described later, is used. In addition, selector 10
8, the input data 110K is replaced by a pattern generator (
P, G) 107 to H, D, G 109.

Here, the dither method for halftone reproduction, which is the principle of H, D, and G109, will be explained. First, the threshold matrix will be explained.

The threshold matrix is a multi-bit input image.

A binarization threshold for converting data into 1-bit (binary) video data is given. FIG. 4 shows the conversion method. The input image data (2) is compared with the one-element element ij of the threshold value matrix in the comparator 16, and a one-bit output P is obtained according to the following conditional expression.

The output of this comparator 16 is connected to the white/black record of the printer.

FIG. 5 shows this method in more detail, in which each part of the two-dimensionally distributed input image data is compared with the threshold matrix T, and the output P is determined according to equation (1). The threshold matrix T in this example is composed of mXm components.

The method of comparing the input image data ■ and the threshold matrix T is the method of comparing the value of each input image data E in a 1:1 correspondence with each component of the threshold matrix T, as shown in the 5th oral history), and the method of comparing the value of each input image data As shown in (b), the threshold matrix T (m
Xm) part of x! There is a method of making each image data correspond to (2≦)).

The former is called the dither method, and the latter is generally called the density pattern method, but there is no essential difference. Therefore, in this explanation, the latter method will also be referred to as the dither method.

As described above, the pattern obtained as the output P by the dither method is stable because it is recorded in black and white binary. However, on the other hand, using only black and white binary values has the disadvantage that the number of gradations that can be expressed is small.

Therefore, in this embodiment, by implementing a so-called multi-value output method that outputs dots of gray levels between white and black,
Improved gradation.

FIG. 6 shows the HoD and G1 shown in FIG. 3 that perform four-value output.
09, in which one of a plurality of color signals is processed. The 8-bit input image data 116 is converted into binary, ternary, and
Each comparator 112a, 112b, 112 for four values
Input in parallel to c. Each comparator compares the input image data 116 with the threshold value data read out at a predetermined timing from the ROMs 114a, 114b, 114c storing the threshold value matrix, and based on the comparison result, the 1-dot pulse generator 113a, 2/3-dot pulse Generator 113b.

The outputs of the 1/3 pulse generator 113C each have a pulse width of 1 dot, 2/3 dot, and 1/3 dot. The output with different pulse widths is a four-value output by so-called pulse width modulation.

The OR circuit 117 combines these three outputs and obtains a binary video signal 118. This kind of halftone processing is performed by H,
This is done for each of the plurality of signals input to D and G 109.

Here, the data in the ROM 114 is transferred to a clock 119, which will be described later.
and vertical synchronization signal V-8YNC, horizontal synchronization signal H-SY
ROM address generator 115 which receives NC as input
By this addressing, different threshold data scanned in the main and sub-scanning directions is given in synchronization with the input of image data.

Figure 7 is a configuration diagram of the ISROM address generator 115, including a counter 23 that is reset by the vertical synchronizing signal V-8YNCK and counts the horizontal synchronizing signal H-8YNC, and a counter 23 that is reset by the horizontal synchronizing signal H-8YNC and counts from the frame memory 01. It consists of a counter 24 that counts an image clock CLOCK for image synchronization used for reading out image data.

Then, assuming the output of the counter 23 as a vertical address VA and the output of the counter 24 as a horizontal address HA, R,
Each threshold in the OMl 1.4 threshold matrix is addressed in synchronization with the input image data.

The multi-value output based on pulse width modulation for each valley color in the H and DSG 109 is a stable multi-value output.

Next, we will discuss the timing of applying signals from the frame mechanism 101 to the laser beam scanner via S and P2O3.

A light beam modulated by a semiconductor laser 131 is collimated by a collimating lens 130 and is optically deflected by a rotating polygon mirror 132. The polarized light beam passes through an imaging lens 133 called an fθ lens.
An image is formed on the photosensitive drum 122 and beam scanning is performed. During this beam scanning, the tip of the one-line scan of the light beam is reflected by the mirror 134. conductor (detector) 135. As is well known, the detection signal from the day planner 135 is used as an ID (index) of the image signal or as a horizontal cue signal, and is used as a horizontal output timing control signal. From now on, this will be called the BG double signal.

On the other hand, the timing in the vertical direction, that is, in the paper feeding direction, is as shown in FIG.
Photo interrupter 60Y%M, C, BK at the tip of P
The output is obtained for each printer mechanism by detecting the output. To accomplish this, the belt 127 is constructed from a transparent or translucent material.

FIG. 9 shows this pattern. A pinhole play (137) is provided between the lamp 135 and the detector 36 that constitute the photointerrupter 60, and the transfer material P passes between them. lamp 13
5 to the detector 36 is blocked. Transfer paper P
It is desirable to pass as close to the pinhole plate 137 as possible.

FIG. 10 is a circuit diagram of such a detector 36. When the detector 36 is irradiated with light through a bent pinhole of a pinhole plate 137, an area operation pump 138 obtains an output V for the photocurrent. Next, when transfer paper is inserted, the output becomes O. By comparing the output (3) of this operational amplifier 138 with a comparator 139 at the next stage, using this displacement level V%ef as one value, an output as shown in FIG. 11(B) is obtained. In this way, the falling signal of the output of Bl (FIG. 11) can be used as a synchronizing signal related to vertical recording control. This will be referred to as the '1Top signal.

It is desirable that the photointerrupter 60 be provided for each color drum as in the example shown in FIG. However, when the paper feed is at a constant speed, the Top signal for the first drum is used as a reference, and the To
The p signal can be generated using a timer or the like.

As described above, a Top signal and a BD double signal are obtained for each color drum.The area obtained from the Top signal and BD double signal is different from the actual recording area of the transfer paper. FIG. 12 shows the actual valve arrangement area RA with respect to the size of the transfer material P, which is called an effective area.

The image signal only has to be given so that only the effective part is recorded, and the signal for synchronizing it is the horizontal synchronizing signal H-8Y.
NC, vertical synchronization signal V-3YNC.

FIG. 13 shows a method of creating such H-8YNC and V-SYNC signals. First, V-8YNC starts with the input of the Top signal 141, counts the BD signal 140 with the programmable counter 44a, and reaches a predetermined count number. At the same time, V-8YNC output 145 is obtained. The H-8YNC signal 146 uses the BD signal 140 as a reference, counts the pixel lock 142 (or a clock with a frequency N times the pixel clock in order to increase the n1 degree), and starts when a predetermined count is reached. It is formed.

If the image data obtained by dithering the image data read from the frame memory 101 and driving the laser scanner 14 is output based on the H-3YNC and V-8YNCi standards, only the effective fil-th tA is recorded. The above signals are applied to YlM, C, and 13 for each valley color.

Programmable counter 13C A switch 143a that is operated by input from a registration correction key (not shown) provided on the operation panel, etc. By setting, the pAf of the registration registration resin of each color in the transfer direction of the transfer IP and the direction perpendicular to the transfer direction is individually set. This makes it possible to easily correct color misregistration and the like.

FIG. 14 shows such synchronizing signals H-8YNC, V-sy'
The timing of data processing in S and P 104 shown in the second diagram based on nc is shown, and V-
8YNC signal shows what is after input. Immediately after the V-8YNC signal is input, as shown in (3), the data (D A
T A ) Ao, A+ %A2 ... is S
, input to P2O3.

Here, the processing clock for data (DATA) differs in the cycle of the synchronizing Clock depending on whether the dither method or the density pattern method is used, but in the dither method, the image input clock and the processing clock are the same.

FIG. 14(2) shows the pulse width modulated VIDEO-OUT signal output from the S and P 104 after halftone dot processing (dither processing). In this way, a pulse width modulated output is obtained, which drives the laser and driver, turning the laser light on and off according to the pulse width.

In this way, the V-8YNC signal obtained by delaying the Top signal formed by detecting the leading edge of the recording material conveyed through a predetermined conveyance path by a predetermined time, and the B-8 YNC signal formed by detecting the scanning position of the laser beam, H obtained by delaying the D signal by a predetermined time
-8YNC signal starts and controls the writing of an image fa onto the photosensitive drum by laser light. In addition, the above V-8YN
The delayed output timing of the C signal and H-8YNC signal can be set individually for each of the four color recording mechanisms for color image regeneration, making it easy to correct subtle color shifts, that is, correct registration. becomes.

Next, the operation sequence in the color LBP of this embodiment will be explained. FIG. 15 shows the overall block diagram,
Y, M, and C%BK attached to each block indicate units related to yellow, magenta, cyan, and black, respectively. In FIG. 15, 200 is a laser drive circuit for driving the semiconductor laser 131 shown in FIG. 7, 201 is a mirror drive circuit for rotationally driving the rotating polygon @ 132 shown in FIG. Photointerrupter for detecting 5
2 is a photo interrupter that detects whether or not the transfer paper P is manually fed to the paper feed guide 51 by the operator;
202 is a drum drive circuit for driving a drum motor, 204 is a paper feed motor drive circuit for driving a paper feed motor, 205 is a main motor drive circuit for driving a main motor, and 10 is a drum drive circuit for driving a paper feed motor. A photo interrupter is provided for each mechanism, 12 is a transfer charger, 11 is a developer, 13 is a cleaner, 207 is the first illustrated static eliminator 6
1, a high voltage source 208 for the first teaching charger 59 for attracting the transfer paper to the belt 2, 209 a control circuit including a well-known microcomputer, 21
0 is a developing bias power supply for the developing device 11.

FIGS. 16 and 17 are flowcharts showing programs for achieving sequential control.

First, when the power is turned on, initial settings of the micro combinator included in the control circuit 209 and settings of interrupt conditions are performed in steps 200 and 201. In step 200, for example, a stack pointer is set and an input/output device is assigned, and in step 201, a jump address at the time of an interrupt and an interrupt device are assigned. Next, the laser drive circuit 200 drives the semiconductor laser 131
Since it has a temperature control function for controlling the temperature of
After confirming that the temperature control has been completed using the signal 204, in step 204, the mirror drive circuit 201 is turned on by outputting mirror drive signals to the signal lines 209 to 212 to start driving the rotating polygon mirror 14. Steps 235 and 236 detect signals on the signal lines 205 to 208 to detect the operating state of the rotating polygon mirror 14;
Confirm that the rotation of the rotating polygon mirror 14 is stabilized at a predetermined rotation speed. Steps 205 and 206 are functions for checking whether or not to start the subsequent sequence, and in this embodiment, the operator selects the transfer paper
is inserted into the device. Paper feed table 51
When the transfer paper is inserted, the process proceeds to step 207, in which signals are output to signal lines 213 to 216 to rotate the photosensitive drums 9, thereby turning on the drum drive circuit 202 and starting rotation of all the drums. Step 207~
The operations up to step 213 do not necessarily have to follow the order shown in FIG. 16, and may be performed in random order or simultaneously. Further, the steps may be progressed while adjusting the time between each step as necessary. Step 2
In 08, the inserted transfer paper is transferred to the main motor drive circuit 2.
A signal is output to the signal line 217 to turn on the feed motor drive circuit 204 that conveys the sheet onto the screen belt 2 driven by the screen belt 2 . Step 209 is to output a signal to the signal line 218 from the main motor drive circuit 205 which drives the main motor that moves the screen belt 2 that transfers the image to the transferred transfer paper to the paper discharge section 7. Turn on by. Step 210 connects the cleaner 13 to the signal line 21 for cleaning the photosensitive drum 9.
Steps 211 to 213 are the primary charger 10° developing bias power supply 210, which are necessary for the electrophotographic process, respectively.
Turn on the static eliminator 61.

By the way, the paper feed roller 53 belonging to the paper feed unit 51 is connected to the paper feed plunger 206 via a clutch (not shown).
As will be explained later, since the paper feed plunger 206 is still off, the driving force of the paper feed motor is transmitted to the paper feed roller 53. Section 514f is waiting. Although the screen belt 2 has already started its operation by the operation in step 209, the inserted transfer paper is moved to a specific position on the screen belt 2, for example, the belt 2
The position of the belt 2 is detected based on the output of the photointerrupter 19 in steps 214 and 215 in order to feed the belt 2 to a position a predetermined distance away from the joint. For example, after detecting the seam of the belt 2 in steps 214 and 215, an appropriate time adjustment is made in step 216 in order to feed the paper to a position a predetermined distance away, and then a signal is sent to the signal line 223 in step 218. By outputting , the paper feed plunger 206 is turned on and the paper feed roller 53 is rotated, thereby feeding the paper. Note that step 217 is similar to step 216 and step 21.
There is no need to be particular about carrying out the operation between 8 and 8, and it is sufficient to turn on the transfer charger 12 at an appropriate time by outputting a signal to the signal lines 224 to 227. Step 20
5 - In step 218, the preliminary stage of the printing operation is completed,
After that, interrupt operation Niyotte mentioned above V-8YNC, H-8
The actual operation of printing an image according to the input image data in synchronization with the YNC signal begins. Since this interrupt uses a timer interrupt in this embodiment, step 219
Now we will start the interrupt timer.

Now, there are three types of interrupt processing, shown as (4), (B), and (Q) in FIG. Transfer charging corresponding to C, BK process units 412Y, 12M, 12C,'
Controls L2B. Steps 220 to 222 show this interrupt processing, and when a special part of the screen belt 2, for example a seam of the belt 2, is a seam where a conductive member is used as the material for the seam,
This is done in order to prevent the high voltage transfer current from discharging into the conductive member. That is, it is set in step 219 so that when the conductive member comes near any of the transfer chargers 12Y, 12M, and 12C112BK, the corresponding transfer charger is turned off at step 220. The interrupt processing is started by the set timer. Step 221G-1: Adjust the time until the conductive member passes through the transfer chargers 12Y, 12M, and 12C1128K. Step 222 is step 2
After the time adjustment made in step 21, transfer chargers 12Y and 12M
, 12C, and 128 are turned on again. In this interrupt processing, control is performed by outputting signals to signal lines 224-227. The second interrupt processing (B) is interrupt processing 5 to 8, which are Y, M, and C respectively.
, the developing device 11Y11 included in the BK process unit.
Controls 1M and lIC1IIBK. Step 22
In steps 3 to 225, the developing device 11 is controlled so that development is performed only when the image to be transferred to the transfer paper is being written onto the photosensitive drum 9 by laser light. In this interrupt processing, control is performed by outputting signals to signal lines 232-235. The third interrupt process (@ is interrupt process 9, which performs post-processing after one sheet of printing has been performed.

The order of steps 226 to 234 is arbitrary;
It may also be done at the same time. In this embodiment, in consideration of the characteristics of the photosensitive belt drum 9, the transfer charger 12 is turned off in step 226, the time is adjusted in step 227, and the primary charger 10 is turned off in step 228. Step 229
~Step 234 turns off the static eliminator 61, the developing bias 210, the cleaner 13, the main motor 205, the paper feed motor 204, and the drum motor 202, respectively. The latter unit is the first
It is in the ready state after step 236 in Figure 6 is completed,
Steps 205 and 206 are repeated to wait for the next paper feed.

By the way, although the adsorption charger 59 was not explained in this flowchart, the adsorption charger 59 is used in step 218.
The transfer paper P can be sufficiently attracted to the screen belt 2 by being turned on before paper feeding is performed and turned off after paper feeding is completed. In this embodiment, it has been described that interrupt processing 1 to 8 are performed by timer interrupts, but they may also be interrupted by photointerrupter 0, or time monitoring means or photointerrupter 0. It is also possible to perform a process similar to this interrupt process by detecting the state.

In addition, the image data to be reproduced was obtained from a three-tube color TV camera, but is not limited to this, data from a color TV camera using a solid-state image element such as a CCD, data from a manuscript reader, and communication data. Alternatively, it may be data read from a magnetic or optical storage device.

Further, the printing mechanism is not limited to the four types of Y%M, C, and BK, but may be three colors other than BK, or one in which an intermediate color recording mechanism is added to the R, C, and B recording means.

It goes without saying that the present invention can also be applied to inkjet printers, thermal printers, etc. in addition to laser beam printers.

Effects As explained above, according to the present invention, color shift in color reproduction due to superimposition of multiple colors is corrected, and long-lasting color reproduction without color shift is possible. Furthermore, since the recording position of each color can be changed, errors in the accuracy of the attachment of each component during assembly of the apparatus can be easily corrected after assembly.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an example of a color image recording device;
FIG. 3 is a block diagram showing a configuration example of the signal processors S and P shown in FIG. 2, FIGS. 4 and 5 are diagrams explaining the dither method, and FIG.
The figure shows third illustrated halftone dot generators H, D,
A block diagram showing an example of the configuration of G, FIG. 7 is the first illustrated device M
Block diagram showing a configuration example of an address generator, No. 8
The figure is a perspective view of the laser scanner shown in the first figure, FIG. 9 is a figure showing the charging of the photointerrupter 60 shown in the first figure, FIG. FIG. 12 is a diagram showing the effective area RA of the transfer paper P, FIG. 13 is a block diagram showing an example of a circuit for forming the V-8YNC signal and the H8YNC signal, FIG. 14 is a time chart showing data processing timing, and FIG. The figure is a block diagram showing an example of a control circuit of the first illustrated color LBP, and FIGS. 16 and 17 are flowcharts showing control means,
2 is a screen belt, 9 is a photosensitive drum, 14 is a laser scanner, 60Y, 60M, 60C and 608 are photointerrupters, 101 is a frame memory, 104 is a signal processor, 109 is a halftone dot generator, 123 and 124 are counters, Detectors 143a and 143b are switches, and 144a and 144b are programmable counters. Fig. 2 Fig. 3 Tvun, Nokoimageji'-21 404 total 2 tJ)'rlT (mvnt) Hoka P Fig. 14 (ρ) VIDEO-OUT (A) Rabbit/7 (B) (C)

Claims (1)

[Claims] A color image recording device that records a color image by conveying a recording material to a plurality of image forming units located at different positions from each other, the adjustment for manually adjusting the image forming timing of each of the image forming units. 1. A color image recording device comprising: means.