JPH09152660A - Image printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily eliminate the deviation of the relative position between an image formed on plural pixels and a photosensitive material, and to align the center line of the image on the photosensitive material in a carrying direction. SOLUTION: Each pixel pitch of a liquid crystal panel 120 is set 10μm, and the pixels are arranged in a matrix state. The center line in the width direction on a photographic printing paper 138 is actually apt to be biased to one guide wall 142A side, as shown by a chain line SD, and the deviation amount is measured and stored at the time of test-printing, etc. In the case of covering the deviation amount into the deviation amount on the liquid crystal panel 120, the amount becomes 1/5 since it is of five magnifications, then, in the case the image is deviated by 1mm on the photographic printing paper 38, the image is deviated by 1/5mm(200μm) on the liquid crystal panel 20. Then, by shifting as long as 20 pixels in a prescribed direction, consequently, the image is printed and exposed at the appropriate position on the photographic printing paper 138.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image printer for printing an image formed on a two-dimensional display device onto a photosensitive material.

[0002]

2. Description of the Related Art Conventionally, a photographic printer irradiates an image recorded on a negative film with light from a light source, forms an image of the transmitted light on a photosensitive material through an optical system (lens, reflection mirror), and exposes it. It is supposed to do.

Usually, a photosensitive material is made long and is sent at a predetermined image size pitch (including, of course, a cutting margin) so that images are continuously exposed.

The photosensitive material is required to be guided by a guide to maintain a constant center line in the carrying direction. However, if there is mechanical variation, the image is not exposed with the center line as a reference, and white edges in particular are generated. For some, the width of this white border may not be uniform. In this case, since the position of the negative film is fixed by the negative carrier, the position cannot be easily corrected, and it is necessary to install a complicated fine adjustment mechanism for the photosensitive material. In addition, this fine adjustment work is complicated, leading to a reduction in workability.

By the way, in recent years, there has been proposed an image printer in which an image is formed by controlling the density of each pixel of a two-dimensional display device and the image is printed on the photosensitive material by the optical means. Since this image printer is digital image data, image processing is easy, and for example, it is possible to put the date and the shooting location in the image, or to combine two images.

[0006]

However, even in such an image printer as described above, displacement of the photosensitive material occurs. In particular, when printing is performed using an optical system, the magnification becomes high, and the higher the magnification becomes, the more noticeable the positional deviation becomes. In order to correct this misalignment at the position of the two-dimensional display device, it is necessary to mount the two-dimensional display device on a frame body having a minute moving mechanism such as a piezoelectric element, which makes the structure and control complicated.

In consideration of the above facts, the present invention can easily eliminate the deviation of the relative position between the image formed on a plurality of pixels and the photosensitive material, and the center line of the image on the photosensitive material in the conveying direction can be reduced. The goal is to have an image printer that can match.

Further, in addition to the above-mentioned object, it is possible to obtain an image printer capable of easily correcting the deviation of the center line in the conveying direction of the image on the photosensitive material for each width dimension of the photosensitive material. Is the purpose.

[0009]

According to the first aspect of the present invention,
A two-dimensional display device that forms an image by controlling the density or brightness of each pixel based on image data, and an optical unit that forms an image formed on the two-dimensional display device on a photosensitive material at a predetermined magnification. An image printer having the optical means for conveying the photosensitive material to a printing position where the image is printed on the photosensitive material, a relative position between the photosensitive material and the two-dimensional display device at the printing position. Pixel shift amount setting means for setting the shift amount in pixel pitch units based on the position shift amount and magnification, and the image display position on the two-dimensional display device based on the value set by the pixel shift amount setting means. And an image display position control unit that shifts in a pixel pitch unit.

According to the first aspect of the present invention, when the photosensitive material is conveyed to the printing position and positioned, the photosensitive material is conveyed while being guided by the width direction guide. It is slightly larger than the width of the photosensitive material. Therefore, the photosensitive material is often conveyed biased to one of the guides.

From the shift amount and the magnification, the shift amount of the pixel pitch unit in the two-dimensional display device is calculated, and the image displayed on the two-dimensional display device is shifted. As a result, it is possible to print and expose the regular position on the photosensitive material.

According to a second aspect of the present invention, the pixel shift amount setting means sets a pixel shift amount for each width dimension with respect to photosensitive materials having two or more types of width dimensions. It has a feature.

According to the second aspect of the present invention, the center of the photosensitive material in the conveying direction is changed depending on the width dimension of the photosensitive material due to the difference in the guide width of the width direction guide and the conveyance property inside the machine due to the difference in the width direction of the photosensitive material. Even if the lines are different, since the shift amount is set for each photosensitive material having a different width dimension, the image can be printed and exposed at a regular position on the photosensitive material.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION In the following embodiments of the present invention, a liquid crystal panel will be described as an example of the two-dimensional display device of the present invention. (First Embodiment) FIG. 1 shows a liquid crystal image forming apparatus 110 according to a first embodiment of the present invention.

The liquid crystal image forming apparatus 110 is provided with a printing section 112. The print unit 112 has RGB
A light source unit 118 including an LED light source 114 of each color and a dichroic mirror 116 for matching the optical axes of these light sources is provided.

A liquid crystal panel 120 is disposed downstream of the light source unit 118 via an optical lens 119 for making the light from the light source unit 118 into parallel light. The liquid crystal panel 120 is connected to a drive unit 122 for controlling the transmission density of a plurality of pixels provided in the liquid crystal panel 120 for each pixel, and the drive unit 122 is connected to a controller 124. The pixel pitch of the liquid crystal panel 120 is 10 μm, and such pixels are arranged in a matrix.

The controller 124 includes the negative image storage unit 1
It is connected to the liquid crystal panel 30 and controls the driving of the liquid crystal panel 120 based on the negative image data input from the negative image storage section 130. Here, each pixel of the liquid crystal panel 120 may not be displayed as the image data due to variations in the dynamic range and resolution of the transmission density. Therefore, the variation is corrected in advance based on the distribution of the amount of transmitted light at the time of total transmission (shading correction). For example, when the pixel groups at the four corners are darker than the pixel group at the central portion when all the light is transmitted, a correction coefficient for reducing the transmitted light amount is set for the pixel group at the central portion so as to match the transmitted light amount at the four corners. The image is displayed based on the correction coefficient. As a result, it is possible to eliminate the uneven light amount of each pixel.

The black shutter 13 is sandwiched by a printing lens 132 on the printing optical axis L on the downstream side of the liquid crystal panel 120.
4 are arranged. The black shutter 134 opens and closes in response to a drive signal from the driver 136, and the printing optical axis L
It is designed to pass or block the light above. Further, the lens 132 is movable along the optical axis L,
Thereby, the enlargement ratio can be changed. In this embodiment, the standard size is set to 5 times.

A printing paper 138 is arranged further downstream of the black shutter 134. This photographic paper 138
Are elongated and are sequentially conveyed from the left side to the right side in FIG. 1 and are sequentially positioned around the printing optical axis L.

FIG. 2A shows an outline of the conveying system of the photographic printing paper 138. As shown in FIG. 2A, the photographic printing paper 138 on the conveying base 140 has both widthwise end portions. It is guided by a pair of guide walls 142A and 142B, and is nipped and conveyed by a plurality of pairs of rollers 125. Here, the center line S in the width direction of the printing paper 138 is
It suffices that they are always conveyed in unison, but due to machine differences and the like, as shown by the chain line SD in FIG. 2, there is a tendency that they are actually biased to one of the guide walls 142A (or 142B). The deviation amount due to the uneven conveyance is measured at the time of test printing, and the information is stored in the controller 124 together with the deviation direction.

By the way, this shift amount is the shift amount on the photographic printing paper 138. When converted into the shift amount on the liquid crystal panel 120, in the present embodiment, the magnification is 5 times, It becomes 5. Therefore, when the image is shifted by 1 mm on the photographic printing paper 138, one pixel (10 μm pitch) corresponds to 0.05 mm on the print, and therefore the liquid crystal panel 120
Above, the deviation is 200 μm.

In the present embodiment, the image itself displayed on the liquid crystal panel 120 is shifted as shown in FIG. 2B in order to correct the deviation amount on the printing paper 138 on the liquid crystal panel 120. There is. That is, when there is a shift of 1 mm on the photographic printing paper 138 as described above, the image is printed and exposed at an appropriate position on the photographic printing paper 138 by shifting it by 20 pixels in a predetermined direction. You can do it. Note that in FIG. 2B, for convenience,
One square is displayed as 10 pixels.

Here, naturally, the shading correction value in the liquid crystal panel 120 is also shifted.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. First, in order to determine the shift amount (including the shift direction) due to the conveyance of the printing paper 138, a test print is performed before the main print. That is, a test print image is displayed on each pixel of the liquid crystal panel 120, exposure is performed, the printing paper 138 that has been subjected to printing exposure is subjected to development processing, and the deviation amount is determined by the operator's visual judgment. This deviation is particularly remarkable in the width direction of the photographic printing paper 138, and is caused when the printing paper 138 is conveyed while being biased to one of the guide walls 142A (142B). This deviation tends to vary depending on the individual device, so that the deviation direction and the amount of deviation are almost constant in each device.

The obtained data (deviation amount) is input to the controller 124 by a key operation, etc.
Then, this shift amount is stored.

First, in step 200, the nth color (n
Reads the image data of the RGB three-color sequential exposure order) from the negative image storage unit 130, and then sets the degree of transmission to each pixel of the liquid crystal panel 120 in step 202.

At the next step 204, the deviation amount of the corresponding printing paper width which has been inputted in advance is read out, and then at step 206.
Then, the shift pitch number is calculated from the current magnification and set. For example, if the magnification is 5 times and the deviation is 1 mm, 20
It is necessary to shift by pixels.

In the next step 208, the image is shifted by the set shift amount, and the process moves to step 210 to execute the printing exposure process. At this time, the correction coefficient for each pixel of the shading correction is naturally shifted and executed.

In the printing exposure process, the photographic printing paper 138 is conveyed to a predetermined position and positioned, and the black shutter 1
34 is opened for a predetermined time, the image on the liquid crystal panel 120 is transmitted by the light from the light source unit 118, and the transmitted image is printed on the printing paper 138 via the lens 132.

When the printing exposure process in step 212 is completed, it is judged whether or not the variable n has become 3 or more. If the judgment is negative, the process proceeds to step 214 to obtain the image data of the next color. After incrementing n, the process returns to step 200, the image data of the nth color is read, and the above process is repeated.

If an affirmative judgment is made in step 212, it is judged in step 216 whether or not there is next image data, and if a positive judgment is made, step 2 is executed.
At 18, the variable n is reset to 1, the process returns to step 200, and the above process is repeated. If the determination in step 216 is negative, the process ends.

In this way, by preliminarily predicting the transport deviation amount of the photographic printing paper 138 with the machine difference of each device and shifting the display to the pixel of the liquid crystal panel 120,
Since this deviation is eliminated, the complicated printing paper 13
The positioning mechanism of No. 8 is unnecessary, and the device configuration is simplified. Further, by using the liquid crystal panel 120, it is possible to correct the deviation with such a simple configuration (control), and it is possible to obtain a unique effect that the conventional printer does not have.

In the first embodiment, the operator judges the print misalignment amount in advance by a test print or the like,
Although it is inputted and stored in the controller 124 by key operation, a sensor or the like is provided in a part of the conveyance system of the photographic printing paper 138 (preferably closer to the printing position) to detect a real-time shift amount, The shift amount may be calculated based on the detection data.

In the first embodiment, the print shift amount is input for each print, and the pixel shift amount calculated from the magnification is stored in the memory. However, the pixel shift amount calculated separately beforehand is stored. May be set directly. By doing so, it is not necessary to calculate the shift amount for each printing, the algorithm is simplified, and the processing efficiency can be improved. Further, it is possible to shift not only the width direction of the printing paper but also the conveying direction of the printing paper 138. (Second Embodiment) Hereinafter, a second embodiment of the present invention will be described. The same components as those in the first embodiment are designated by the same reference numerals, and the description of the components will be omitted.

The characteristic of the second embodiment is that the printing paper 138 is used.
This is because the exposure system described in the first embodiment is applied to a printer processor that successively carries out the steps of printing exposure of a negative image on the image, developing processing of the printing paper 138, and drying processing.

The configuration of the printer processor 10 of this embodiment will be described with reference to FIG. The printer processor 10 whose outside is covered with a casing 12 includes a printing unit 112 that exposes photographic paper and a processor unit 72 that performs developing, fixing, rinsing, and drying processes on the exposed photographic paper.
And

A work table 14 projecting from the casing 12 to the left in FIG. 4 is installed in the printing section 112, and the liquid crystal panel 120 and the operator inputs commands, data, etc. on the upper surface of the work table 14. A keyboard 15 is provided for this purpose. LCD panel 1
An image for each color is displayed on the display 20 based on the image data stored in the control unit 20. That is, the image of the negative film is read in advance by the scanner and stored in the control unit 20, color correction and the like are already performed, and the read image data is processed with the same exposure time for each color. Has become. Further, shading correction of the liquid crystal panel 120 is also added.

A light source unit 18 is installed below the work table 14, and the light emitted from the three color LED light sources 14 reaches the liquid crystal panel 120 via the parallel light lens 19.

A cover 44 is formed on the downstream side (upper side in FIG. 4) of the liquid crystal panel 120.
An optical system 46 is provided inside.

In the optical system 46, an exposure lens 48 for changing the magnification of an image to be exposed and a black shutter 50 for blocking the exposure light are sequentially arranged. A mirror 51, which reflects the exposure light in a substantially right-angled direction, is arranged downstream of the black shutter 50, and the exposure light reflected by the mirror 51 is set in an exposure chamber 52.
The photographic paper 138 is exposed.

A mounting portion 60 is provided at a corner between the upper right side surface of the cover 44 and the upper surface of the casing 12. The mounting portion 60 is a paper for accommodating the photographic paper 138 wound on the reel 62 in layers. The magazine 64 is mounted.

A pair of rollers 66 is disposed near the mounting portion 60, and holds the photographic printing paper 138 in a horizontal state to sandwich the photographic printing paper 138.
Transport to 2. The printing paper 138 is wound around the roller 67 in front of the cover 44, turned 90 degrees and hung down.
It should be noted that a photographic printing paper is approximately U-shaped between the rollers 66 and 67.
The first stocking unit 69 that guides and stocks in a letter shape
Is provided.

A roller 68 is provided below the exposure section of the exposure chamber 52.
A, 68B, 68C are arranged, and the photographic paper 138 on which the image of the negative film 16 is printed in the exposure chamber 52 is
Each of the rollers 68A, 68B, and 68C changes the direction by about 90 degrees and conveys it to the processor unit 72 described later.

A cutter 71 is arranged on the downstream side of the roller 68A, and the cutter 71 cuts the rear end of the printing paper 138 which has been exposed. The printing paper 138 cut by the cutter 71 and remaining in the exposure chamber 52 can be rewound into the paper magazine 64 again. Further, between the rollers 68A and 68B, there is provided a second stock portion 73 for guiding and stocking the printing paper 138 which has been subjected to the baking processing in a substantially U shape. Second stock section 73
Then, by stocking the printing paper 138, the difference in processing time between the printer unit 58 and the processor unit 72 is absorbed.

Next, the configuration of the processor section 72 will be described. The processor section 72 is provided with a color development processing tank 74 in which a color development processing solution is stored, a bleach-fixing processing tank 76 in which a bleach-fixing processing solution is stored, and a plurality of rinse processing tanks 78 in which a washing processing solution is stored. The photographic printing paper 138 is sequentially conveyed through the color development processing tank 74, the bleach-fixing processing tank 76, and the plurality of rinsing processing tanks 78, so that the developing, fixing, and washing processes are sequentially performed. Washed photographic paper 1
38 is conveyed to the drying unit 80 adjacent to the rinse treatment tank 78, and in the drying unit 80, the photographic printing paper 138 is wound on rollers and exposed to high temperature air to be dried.

The printing paper 138 is nipped by a pair of rollers (not shown), and is discharged from the drying section 80 at a constant speed after the drying process is completed. A cutter unit 84 is provided on the downstream side of the drying unit 80, and the cutter unit 84 has a cut mark sensor 8 for detecting a cut mark applied to the printing paper 138.
6, a paper density measuring unit 90 for measuring the density of the printing paper 138, and a cutter 88 for cutting the printing paper 138.
And are installed. In the cutter unit 84, the photographic paper 13
8 is cut for each image frame by the cutter 88, and the photographic print is completed.

By applying the present invention to the printing exposure system of the printer processor as described above, the amount of deviation when the printing paper 138 is conveyed is corrected by the shift of the display of the liquid crystal panel 120, and a complicated position adjusting mechanism is provided. Is unnecessary.

In the second embodiment, the image on the negative film is read in advance by the scanner and stored, but a negative carrier is arranged on the work table 14 in parallel with the liquid crystal panel 120. Alternatively, image frames may be sequentially read by a scanner (CCD image sensor or the like) in synchronization with printing exposure, and an image may be displayed on the liquid crystal panel 120 based on the data. (Third Embodiment) The third embodiment of the present invention will be described below.

The third embodiment is characterized in that the exposure system described in the first embodiment is installed as an index printer in an existing printer processor. The configuration of the printer processor 11 according to the third embodiment will be described below with reference to FIGS.

As shown in FIG. 5, the exterior is a casing 1
The printer processor 11 covered by 2 is a printer unit 5 that exposes photographic printing paper for main printing and sub printing.
8 and a processor unit 72 that performs each process of developing, fixing, washing, and drying on the exposed printing paper.

First, the structure of the printer unit 58 will be described.
A work table 14 protruding from the casing 12 to the left in FIG. 5 is installed in the printer processor 11, and a negative film 16 is provided on the upper surface of the work table 14.
There are arranged a negative carrier 18 for setting and a keyboard 15 for the operator to input commands, data and the like.

A main exposure light source section 36 is installed below the work table 14. A light source 38 is installed in the main exposure light source section 36, and the light emitted from the light source 38 is
Color correction filter (hereinafter, Color-Correction Filter: C
The negative film 16 set on the negative carrier 18 is reached via a C filter 40) and a diffusion tube 42.
The CC filter 40 has C (cyan), M (magenta), Y
It is composed of three sets of (yellow) filters, and each filter operates under the control of the CC filter control unit 39,
The light emitted from the light source 38 can appear and disappear on the optical axis.

A cover 44 is formed on the downstream side of the negative carrier 18 (upper side in FIG. 1).
A main exposure optical system 46 and a sub-printing section 22 that exposes sub-prints such as index prints are provided therein.

A half mirror 43 is arranged at the lowermost part of the main exposure optical system 46, and the light transmitted through the negative film 16 set on the negative carrier 18 reaches it. An exposure lens 48 for changing the magnification of an image to be exposed and a black shutter 50 for blocking the exposure light are sequentially arranged on the downstream side of the optical path passing through the half mirror 43. A mirror 51, which reflects the exposure light in a substantially right-angled direction, is arranged on the downstream side of the black shutter 50, and the exposure light reflected by the mirror 51 is applied to the printing paper 138 set in the exposure chamber 52. By photographic paper 138
Exposure is performed.

On the other hand, on the downstream side of the optical path reflected by the half mirror 43, a photometric lens 45 for changing the magnification of the photometric image is arranged, and on the downstream side of the photometric lens 45, a half A mirror 47 is arranged.

As shown in FIG. 6, a scanner 108 composed of an image sensor or the like is arranged in the direction in which light is reflected by the half mirror 47.
An image signal processing unit 102 that performs predetermined image processing on the image data of each frame of the negative film 16 read by the scanner 108 is connected to the unit 8.

A simulator 104 as an image display device is connected to the image signal processing unit 102, and the simulator 104 is used in the case where the image of each frame of the negative film 16 is produced based on the set conditions. A print simulation image is displayed.

An image memory 106 for storing image data is connected to the image signal processing unit 102, and the image signal processing unit 102 stores the image data of each frame of the negative film 16 read by the scanner 108. It is stored in the image memory 106.

A negative density measuring section 56 for measuring the image density of each frame of the negative film 16 is provided on the downstream side of the optical path passing through the half mirror 47, and the negative density measuring section 56 has an image sensor. Scanner 56B composed of the like and the negative film 1 read by the scanner 56B
Negative density measuring device 56A for measuring the image density of each frame of 6
And are installed.

The sub-printing section 22 is provided with a light source unit 118 provided with an LED light source 114 that emits red, blue and green colors as an exposure light source for index printing. The operation is controlled by 24. These LED light sources 114 have their optical axes matched by a dichroic mirror 116.

A mirror 30 is disposed at the end of the optical path (a position that does not affect the image) downstream of the dichroic mirror 116 in the light traveling direction, and is emitted from the light source in the light reflecting direction by the mirror 30. A light source light amount sensor 29 for measuring the light amount of the emitted light is arranged.

On the downstream side of the arrangement position of the mirror 30,
The liquid crystal panel 120 is arranged on a surface perpendicular to the exposure optical axis X. On the image display surface of the liquid crystal panel 120, a large number of pixels capable of displaying white, black and an intermediate color thereof are regularly arranged by an electric means, and the liquid crystal panel 120 has 256 gradations. It is possible to express. A liquid crystal panel driver 32 that drives the liquid crystal panel 120 is connected to the liquid crystal panel 120, and a sub control unit 23 that monitors and controls various processing states in the sub print unit 22 is connected to the liquid crystal panel driver 32. There is. The sub-control unit 23 includes a CPU, a RAM,
It consists of ROM, input / output controller, etc.,
The image memory 106 described above via the input / output controller.
It is connected to the.

The sub-control unit 23 reads the image data of each frame of the negative film 16 stored in the image memory 106, forms one index image data in which the frame images are arranged according to a predetermined rule, and forms the formed one. A predetermined number of frames out of the index image data of the case, 5 as an example
An image corresponding to the image data for one frame (for one column) is displayed on the liquid crystal panel 120 by the liquid crystal panel driver 32.

On the downstream side of the arrangement position of the liquid crystal panel 120, the mirror 3 is provided at the end of the optical path (the position which does not affect the image).
4 is arranged, and a transmitted light amount sensor 33 for measuring the amount of light transmitted through the liquid crystal panel 120 is arranged in the light reflection direction of the mirror 34.

On the downstream side of the arrangement position of the mirror 34,
An exposure lens 35 for changing the magnification of the image of the sub-print to be exposed is arranged, and the image of the index print displayed on the liquid crystal panel 120 by the exposure lens 35 and projected by the exposure light is printed on the photographic paper 138 in a predetermined manner. Imaged at magnification.

When the printing paper 138 is misaligned during the image formation, the misalignment amount (deviation direction) is stored in advance, and pixel display is performed according to the misalignment amount and the magnification. It is designed to shift the position.

The light source control unit 24, the light source light amount sensor 29, and the transmitted light amount sensor 33 are further connected to the sub control unit 23.

Like the sub-control unit 23, the main control unit 20 for controlling and monitoring the entire printer processor 10 is provided.
Is provided below the exposure chamber 52. The main control unit 20 includes a CPU (not shown), a RAM, a ROM, an input / output controller, and the like. The main control unit 20 includes:
The above-described CC filter control unit 39 and the negative density measuring device 56
A, the image signal processing unit 102 and the sub control unit 23 are connected, and monitor and control the operation of each of these components.

A mounting portion 60 is provided at a corner portion between the upper right side surface of the cover 44 and the upper surface of the casing 12, and the mounting portion 60 is a paper for accommodating the photographic paper 138 wound in layers on the reel 62. The magazine 64 is mounted.

As shown in FIG. 5, a pair of rollers 66 is arranged near the mounting portion 60, and holds the photographic printing paper 138 and conveys it horizontally to the exposure chamber 52. The printing paper 138 is wound around the roller 67 in front of the cover 44, turned 90 degrees and hung down. A first stock unit 69 is provided between the roller 66 and the roller 67 to guide and stock the photographic paper in a substantially U-shape.

A roller 68 is provided below the exposure section of the exposure chamber 52.
A, 68B, 68C are arranged, and the photographic paper 138 on which the image of the negative film 16 is printed in the exposure chamber 52 is
Each of the rollers 68A, 68B, and 68C changes the direction by about 90 degrees and conveys it to the processor unit 72 described later.

A cutter 71 is arranged on the downstream side of the roller 68A, and the cutter 71 cuts the rear end of the printing paper 138 which has been exposed. The printing paper 138 cut by the cutter 71 and remaining in the exposure chamber 52 can be rewound into the paper magazine 64 again. Further, between the rollers 68A and 68B, there is provided a second stock portion 73 for guiding and stocking the printing paper 138 which has been subjected to the baking processing in a substantially U shape. Second stock section 73
Then, by stocking the printing paper 138, the difference in processing time between the printer unit 58 and the processor unit 72 is absorbed.

Next, the configuration of the processor section 72 will be described. The processor section 72 is provided with a color development processing tank 74 in which a color development processing solution is stored, a bleach-fixing processing tank 76 in which a bleach-fixing processing solution is stored, and a plurality of rinse processing tanks 78 in which a washing processing solution is stored. The photographic printing paper 138 is sequentially conveyed through the color development processing tank 74, the bleach-fixing processing tank 76, and the plurality of rinsing processing tanks 78, so that the developing, fixing, and washing processes are sequentially performed. Washed photographic paper 1
38 is conveyed to the drying unit 80 adjacent to the rinse treatment tank 78, and in the drying unit 80, the photographic printing paper 138 is wound on rollers and exposed to high temperature air to be dried.

The photographic printing paper 138 is sandwiched by a pair of rollers (not shown), and is discharged from the drying section 80 at a constant speed after the completion of the drying process. A cutter unit 84 is provided on the downstream side of the drying unit 80, and the cutter unit 84 has a cut mark sensor 8 for detecting a cut mark applied to the printing paper 138.
6, a paper density measuring unit 90 for measuring the density of the printing paper 138, and a cutter 88 for cutting the printing paper 138.
And are installed. These cut mark sensors 8
6, the paper density measuring unit 90, and the cutter 88 are connected to the main control unit 20, respectively. In the cutter unit 84, the photographic printing paper 54 is cut by the cutter 88 for each image frame,
The photo print is completed.

The completed photographic prints are discharged to the sorter unit 92, sorted in the sorter unit 92, and subjected to a predetermined verification work. By this verification work, after defective prints such as so-called out-of-focus images are extracted, normal photographic prints are returned to the customer together with the negative film.

Here, since the size of the index print is larger than the size of a normal print, if there is a deviation in the conveyance of the photographic printing paper 138, the dimensional difference in the peripheral white edge portion due to this deviation appears remarkably. . At this time, if the deviation is corrected at the display stage on the liquid crystal panel 120 as in the present invention, the image can be printed and exposed with high accuracy.

Although the liquid crystal panel 120 has been described as an example of the two-dimensional display device in the present embodiment, the following two-dimensional display device to which the present invention is applicable is shown below in addition to the liquid crystal panel 120. However, the present invention is not limited to these and is applied to a similar two-dimensional display device.

[0078]

[Table 1]

Incidentally, in the reflection type spatial modulation element such as the DMD, control of the effective time of the reflection surface is mentioned as a function equivalent to the control of the density or the brightness. Further, the image data is displayed as low density = high density.

[0080]

As described above, the image printer according to the present invention can easily eliminate the deviation of the relative position between the image formed on a plurality of pixels and the photosensitive material. It has an excellent effect that the center lines in the transport direction can be matched.

In addition to the above effects, even if there is a deviation of the center line of the photosensitive material in the conveying direction of the image for each width dimension, the deviation can be easily corrected.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a liquid crystal image forming apparatus according to a first embodiment of the present invention.

FIG. 2A is a schematic view of a photographic printing paper transport system according to the first embodiment of the present invention, and FIG. 2B is a plan view showing a moving state of a pixel unit on a liquid crystal panel.

FIG. 3 is an exposure control flowchart according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram of a printer processor according to a second embodiment of the present invention.

FIG. 5 is a schematic diagram of a printer processor according to a third embodiment of the present invention.

FIG. 6 is a control block diagram of an exposure system of a printer processor according to a third embodiment of the present invention.

[Explanation of symbols]

 110 Liquid Crystal Image Forming Apparatus 112 Print Section 114 LED Light Source 118 Light Source Unit 120 Liquid Crystal Panel 130 Negative Image Storage Section 138 Printing Paper 140 Conveying Base 142A, 42B Guide Wall

Claims (2)

[Claims] 1. A two-dimensional display device for forming an image by controlling the density or brightness of each pixel based on image data, and an image formed on the two-dimensional display device is connected to a photosensitive material at a predetermined magnification. In an image printer having optical means for forming an image, and a conveying means for conveying the photosensitive material to a printing position where the image is printed on the photosensitive material by the optical means, the photosensitive material and the two-dimensional display device at the printing position. Pixel shift amount setting means for setting the shift amount in the pixel pitch unit based on the relative position shift amount and the magnification, and the two-dimensional display device based on the value set by the pixel shift amount setting means. And an image display position control means for shifting the upper image display position in pixel pitch units. 2. The pixel shift amount setting means sets a pixel shift amount for each width dimension with respect to photosensitive materials having two or more types of width dimensions. Image printer described.