JPH08271851A - Recorder - Google Patents

Abstract

PURPOSE: To realize recording with high resolution by recording an image on a photoreceptor while moving a liquid crystal panel. CONSTITUTION: In the case the liquid crystal panel 1 exists at an initial position, an image signal in accordance with the signal of an odd-numbered field delayed by one horizontal cycle us displayed on the panel 1 and recorded on the photoreceptor 4. The panel 1 is moved by half of a picture element pitch in the vertical direction in a direction shown by an arrow A and the image signal in accordance with an even-numbered field delayed by one horizontal cycle is displayed on the panel 1 and the image is recorded on the photoreceptor 4. Continuously, when the panel 1 is moved by the half of the picture element pitch in the direction shown by the arrow A in figure, the image signal in accordance with the signal in the odd-numbered field is displayed on the panel 1, so that the image is recorded on the photoreceptor 4. When the panel 1 is moved by the half of the image element pitch in the direction shown by the arrow A in figure, the image signal in accordance with the signal in the even-numbered field is displayed, so that the image is recorded on the photoreceptor 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device.

[0002]

2. Description of the Related Art Conventionally, in an image recording apparatus for producing a hard copy by forming a display image of a liquid crystal panel on a photosensitive material, for example, an optical means such as a diffraction grating is used to compensate for the low aperture ratio of the liquid crystal panel. Is used to diffract the light of each pixel and expose the area corresponding to the light-shielding portion of the liquid crystal panel on the photosensitive material.

Further, in an apparatus for recording a color image by providing a color filter for each pixel, by adjoining pixels adjacent to each other through a light-shielding portion on a photosensitive material by using an optical means such as a diffraction grating to mix colors. , A structure for performing color image recording is adopted.

[0004]

However, in the former case, in the region corresponding to the light-shielding portion of the liquid crystal panel on the photoconductor, the resolution is lowered due to the influence of a plurality of adjacent openings (pixels). There was a problem that it would end up. Further, as described above, in order to obtain high resolution without using an optical means such as a diffraction grating, an expensive liquid crystal panel with high resolution has to be used.

In the latter case, since the adjacent pixels are overlapped with each other through the light-shielding portion, the exposure area corresponding to one pixel becomes large and the resolution is lowered. .

An object of the present invention is to provide an inexpensive high resolution recording apparatus.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a plurality of pixels which receive an image signal and are selectively in a light transmitting state or a light blocking state are arranged in a matrix, and a light shielding portion is provided between each pixel. Optical shutter panel, a light source for irradiating the optical shutter panel, an optical means for image-forming and exposing a projection image transmitted through the optical shutter panel on the photoconductor by the irradiation by the light source, and the photoconductor for the projection image. A moving means for moving the image forming position above, an image signal control means for supplying an image signal corresponding to the image forming position to the pixel by the moving means, and a supply of the image signal to each pixel in synchronization with each other. Then, the above object is achieved by providing a light source driving means for causing the light source to emit light.

It is desirable that the above-mentioned pixel is provided corresponding to each of the three primary colors of light.

It is desirable to provide an optical control means for superimposing the projected images of the pixels corresponding to the three primary colors of light at least adjacent to the above-mentioned ones and exposing them on the photoconductor.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention relating to the recording apparatus of the present application will be specifically described below with reference to the embodiments shown in the drawings.

In FIG. 1, reference numeral 1 denotes a liquid crystal panel having a matrix of pixels forming an optical shutter panel, which displays an image signal of a television or the like. Generally, in the case of a relatively inexpensive liquid crystal panel used as a projector or a viewfinder, it has a size of about 1 inch and has about 230 pixels in the vertical direction and about 400 to 800 pixels in the horizontal direction. An image corresponding to one field can be displayed. In such a liquid crystal panel, since the degree of integration is high, the proportion of the light-shielding area due to the wiring or the like is large, and the proportion of the entire opening is 25.
It is about 50%. In this example, the aperture ratio is about 25%,
It has 230 pixels in the vertical direction and 420 pixels in the horizontal direction.
The size of one pixel is 16 μm in the horizontal direction and 25 in the vertical direction.
The light-transmitting liquid crystal panel having a checkered pixel array as shown in FIG. 2 is used, and is driven by a liquid crystal panel driving unit 9 described later. In the figure, the hatched portion is a light-shielding portion with a black stripe. Reference numeral 2 is a light source, and in this example, a halogen lamp used for high-intensity lighting or the like is used. Reference numeral 2a is a reflection mirror, which has a parabolic cross section, for example, and is for efficiently irradiating the liquid crystal panel 1. Reference numeral 3 denotes an image forming optical system which constitutes an optical means. In this example, a lens optical system for forming an image on the liquid crystal panel 1 on the photoconductor 4 at a predetermined magnification is used, but other optical systems such as a fiber plate are used. If a system is used or an output image of the same size as that of the liquid crystal panel 1 is sufficient, a unit size optical system can be used. In this example, the photosensitive member 4 is a monochrome one such as a normal camera negative film or instant film. Reference numeral 5 denotes a liquid crystal panel feeding mechanism that constitutes a moving means, and moves the liquid crystal panel 1 in a fixed direction on a plane where the pixels are arranged at regular intervals. In this example, as shown in FIG. 3, the pixel array is moved three times in the vertical direction by half the pixel pitch (46 μm in this case) and then returned to the original position. The structure of the liquid crystal panel feeding mechanism will be described later. 6 is an A / D conversion circuit, 7
Is a D / A conversion circuit. Reference numeral 8 denotes a storage circuit, which includes an even / odd determination circuit 81, a selection circuit 82, an odd field memory 83, an even field memory 84, 1 horizontal cycle delay circuits 85 and 86, and a selection circuit 87, as shown in FIG. One frame (odd field and even field) of the race image signal is stored, and the stored one frame image signal is appropriately processed and output. The even / odd determination circuit 81 discriminates whether the input image signal is an odd field or an even field. Selection circuit 82
Selects the odd field memory 83 and the even field memory 84 according to the identification of the even / odd determination circuit 81. The odd field memory 83 is composed of a RAM or the like and stores the image signals of the odd field as a two-dimensional array, and the even field memory 84 is composed of a RAM or the like and stores the image signals of the even field as a two-dimensional array. The one horizontal cycle delay circuits 85 and 86 output signals obtained by delaying the input image signal by one horizontal cycle. The selection circuit 87 sequentially outputs four kinds of signals of an odd-field signal delayed by one horizontal period, an even-field signal delayed by one horizontal period, an odd-field signal, and an even-field signal at timings described later. . Returning to FIG. 1, the liquid crystal panel drive unit 9 drives the pixels of the liquid crystal panel 1 according to the input image signal. The D / A conversion circuit 7 and the storage circuit 8
The liquid crystal panel drive section 9 constitutes an image signal control means. A timing circuit 10 controls the operation timing of each circuit by operating a print switch (not shown). Reference numeral 11 denotes a light source driving section which constitutes a light source driving means, and drives the light source 2.

Here, the structure of the liquid crystal panel feeding mechanism 5 will be described with reference to FIGS. FIG. 6 is a plan view seen from the direction of arrow A in FIG. As described above, the liquid crystal panel feeding mechanism 5 moves the liquid crystal panel 1 in the vertical direction of the pixel array three times by half the pixel pitch and returns to the original position again.

In FIG. 5, reference numeral 51 denotes a panel receiving portion to which the liquid crystal panel 1 is fixed by screws 52. Panel receiving part 5
Guides 53a, 53b, 53c, 53 are provided on both sides of FIG.
d is provided, and the guide 53a has a pitch of 0.5 m provided on the shaft 54 arranged in a direction parallel to the vertical direction of the pixels of the liquid crystal panel 1 (direction parallel to the arrow A).
The guide 53b is slidably fitted to the small-diameter portion 54b of the shaft 54. The guide 53c is screwed into a screw portion 55a (right screw) having a pitch of 0.5 mm provided on the shaft 55 arranged in a direction parallel to the shaft 54, and the guide 53d is attached to the small diameter portion 55b of the shaft 55. It is fitted so that it can slide freely. The shafts 54 and 55 have center axes 54c and 55c, respectively, which are bearings 56 of the guide frame 56.
a and 56b are rotatably held and have respective locking portions 5
4d and 55d engage the locking portions 56c and 56d of the guide frame 56, and the shaft guide portions 56e and 56 of the guide frame 56.
It is rotatably held at f. It should be noted that the shaft 55 has a central axis 55c so as to prevent backlash in a direction perpendicular to the direction of the arrow A with respect to the movement of the liquid crystal panel 1 in the direction of the arrow A.
The clearance between the bearing 54b, the bearing 56b, and the shaft guide portion 56f is minimized, and the shaft 54 has a long hole so that it can escape (lock prevention). Reference numerals 57 and 58 denote compression springs, which are wound around shafts 54 and 55, respectively. One end of the compression spring 57 is fixed to the guide frame 56 near the shaft guide portion 56e, and the other end is fixed to the guide 53a. One end of the compression spring 58 is fixed to the guide frame 56 near the shaft guide portion 56f, and the other end is fixed to the guide 53c. The panel receiving portion 51 is biased in the arrow A direction by these springs 57 and 58. An arm 59 is press-fitted into the shaft portion 54e of the shaft 54,
An arm 510 is press-fitted into the shaft portion 55e of the shaft 55 (see FIG. 6). Turning to FIG. 6, the arms 59, 510
Are rotatable about shafts 54e and 55e, respectively, and the levers 511 are attached to the shafts 59 and 510 on the arms 59 and 510, respectively.
a and 510a. A roller 512 is rotatably connected to the lever 511 about a shaft portion 513, and is elastically contacted by a tension spring 516 to a cam 515 attached to a stepping motor 514. Cam 51
Reference numeral 5 has four cam surfaces R1, R2, R3, and R4, and every rotation of 90 degrees in the direction of arrow B switches the cam surface that contacts the roller 512. Then, the cam surface R of the cam 515
The lever 511 follows the direction of arrow C with respect to 1, R2, R3, and R4, and the arm 5 moves as the lever 511 moves.
The centers of 9, 510 can be stopped at the positions of A1, A2, A3, A4, respectively. In this example, A1, A2, A3,
The angle between the positions of A4 is about 16.5 degrees, and when the shafts 54, 55 rotate at this angle, the screw parts 54a, 5
Since the pitch of 0.5a is 0.5 mm, the panel receiving portion 51 has the pitch of about 23 μm (0. It is movable by 023 mm).
A flat cable 517 is connected to the liquid crystal panel 1.

Next, the operation of FIGS. 5 and 6 will be described. Now
It is assumed that the cam surface R1 of the cam 515 is in contact with the roller 512, and the position of the liquid crystal panel 1 in this state is the initial position. When a drive pulse is supplied to the stepping motor 514 and the cam 515 rotates 90 degrees in the direction of arrow B, the cam surface in contact with the roller 512 moves from R1 to R2, which moves the lever 511 to the right in the drawing. , The centers of the arms 59, 510 move from A1 to A2. As a result, the shafts 54 and 55 rotate about 16.5 degrees, and the guides 53a that are screwed into the screw portions 54a and 55a,
53c is (16.5 ° / 360 °) × 0.5 mm = 0.
023 mm Move in the direction of arrow A. The compression spring 57 removes the play between the screw portions 54a and 55a and the guides 53a and 53c, whereby the panel receiving portion 51 moves in the parallel direction in the arrow A direction of 23 μm. Hereinafter, when a drive pulse is supplied to the stepping motor 514 in the same manner as described above,
The cam surfaces R3 and R4 contact the roller 512 and operate in the same manner, and the panel receiving portion 51 further translates by 23 μm in the direction of arrow A and returns to the initial position again.

Next, the outline of the operation will be described.

When the print switch is operated, the memory circuit 8 stores the input A / D converted image signal, and the liquid crystal panel feeding mechanism 5 positions the liquid crystal panel 1 at the initial position (upward in the drawing).

The memory circuit 8 has the liquid crystal panel 1 in the initial position.
Output an image signal (in this case, an odd field signal delayed by 1 horizontal period) according to the above, turn on the light source 2,
The display image on the liquid crystal panel 1 at this time is recorded on the photoconductor 4.

When the recording of the liquid crystal panel 1 at the initial position is completed, the liquid crystal panel 1 is moved in the direction of arrow A in FIG.
3 .mu.m feed, that is, a half pitch feed in the vertical direction, displays an image signal (in this case, an even field signal delayed by 1 horizontal period) according to the moving position, and turns on the light source 2 to turn on the liquid crystal. The display image on the panel 1 is recorded according to the photoconductor 4.

Thereafter, the liquid crystal panel 1 is moved to the arrow A in the same manner as described above.
23 μm each in the vertical direction, that is, by half pitch in the vertical direction, image signals (in this case, odd field signals and even field signals) corresponding to these positions are displayed, and the light source 2 is turned on at each position. The light is turned on and recording is performed according to the photoconductor 4.

Next, the outline of the recording operation on the photosensitive member 4 will be described.

In order to make the description easy to understand, the number of pixels in the vertical direction is 8, the number of pixels in the horizontal direction is 11, and an interlace signal as shown in FIG. 7 is used as an image signal for one frame. The recorded image shall be recorded. As shown in the figure, in interlaced scanning,
The image of the nth line of the odd field is located between the images of the nth line and the (n-1) th line of the even field. In this case, the odd field memory 83 stores the odd field signal as shown in FIG. 8A, and the even field memory stores the even field signal as shown in FIG. 8B.

When the liquid crystal panel 1 is in the initial position, FIG.
Since an image signal corresponding to the odd field signal delayed by one horizontal period as shown in FIG. 9A is displayed on the liquid crystal panel 1, the photoreceptor 4 records an image as shown in FIG. In the figure, the circled portion is the portion recorded this time, and the numbers shown on the left side of the drawing indicate the scanning line numbers that are not delayed by one horizontal period corresponding to the pixel columns, and on the right side of the drawing. The numbers shown are the numbers corresponding to the pixel columns of the liquid crystal panel 1 this time. It should be noted that print data exists in the portion shown by the broken line circle in the figure, but it is not recorded this time because there is no pixel corresponding to that portion.

The liquid crystal panel 1 is 23 μ in the direction of arrow A in FIG.
When moved by m, an image signal corresponding to an even field delayed by one horizontal period as shown in FIG. 9B is displayed on the liquid crystal panel 1, so that the photoconductor 4 records an image as shown in FIG. To do. That is, an image that is vertically displaced by one pixel from the previously recorded image is recorded together with the previous image. In the figure, the portion indicated by a cross is the portion recorded this time, and the numbers shown on the left side of the drawing indicate the scanning line numbers corresponding to the pixel columns.

Then, when the liquid crystal panel 1 is moved in the direction of arrow A in FIG. 1 by 23 μm, an image signal corresponding to the odd field signal shown in FIG. 4 records an image as shown in FIG. In the figure, the portions indicated by triangles are the portions recorded this time, and the numbers shown on the left side of the drawing indicate the scanning line numbers corresponding to the pixel columns.

Subsequently, when the liquid crystal panel 1 is moved by 23 μm in the direction of arrow A in FIG. 1, an image signal corresponding to the even field signal shown in FIG. 4 records an image as shown in FIG. In the figure, the portion indicated by a square mark is the portion recorded this time, and the numbers shown on the left side of the drawing indicate the scanning line numbers corresponding to the pixel columns.

As described above, since recording can be performed on the photoconductor at a position corresponding to the light-shielding portion of the liquid crystal panel,
High resolution recording can be obtained.

Further, when recording is performed on the photoconductor at a position corresponding to the light-shielding portion of the liquid crystal panel, the liquid crystal panel is moved only in one direction, and therefore, this occurs during movement as compared with the case where the liquid crystal panel is moved in a plurality of different directions. The error can be reduced.

Next, the operation will be described in detail with reference to FIG.
Now, it is assumed that the liquid crystal panel 1 is at a position moved from the initial position by 69 μm in the direction of arrow A.

When a print switch (not shown) is operated (step 14a), the timing circuit 10 stores the input image signal for one frame in the storage circuit 8 (step 14b). Hereinafter, step 14b will be specifically described. When the print switch is operated, the timing circuit 10 operates the selection circuit 82. The selection circuit 82 stores the odd field signal that is A / D converted by the A / D conversion circuit 6 and input in the odd field memory 83 by the even / odd determination of the image signal by the even / odd determination circuit 81, and the A / D conversion is performed. The even field signals input by the above are stored in the even field memory 84. When the odd field memory 83 and the even field memory 84 respectively store the image signals, they output the stored image signals.

The one horizontal cycle delay circuit 85 delays the output of the odd-numbered field memory 83 by one horizontal cycle, and the one horizontal cycle delay circuit 86 delays the output of the even-numbered field memory 84 by one horizontal cycle. Output.

When step 14b is completed, the timing circuit 10 outputs a drive pulse to the liquid crystal panel feeding mechanism 5 to set the liquid crystal panel 1 to the initial position (step 1).
4c).

When the output of the drive pulse is completed, the timing circuit 10 causes the selection circuit 87 in the memory circuit 8 to select the signal of the odd field delayed by one horizontal period, and the selection circuit 87 is delayed by one horizontal period. The signal of is output. This signal is D / A converted by the D / A conversion circuit 7, and the liquid crystal panel drive section 9 displays an image corresponding to this signal on the liquid crystal panel 1 (step 14d).

When an image is displayed on the liquid crystal panel 1, the timing circuit 10 causes the light source drive unit 11 to emit light from the light source 2 for a predetermined time (1 second in this example) (step 14e).

The light emitted from the light source 2 illuminates the liquid crystal panel 1, and the image thereof is imagewise exposed to the photoconductor 4 through the lens 3 and recorded.

When the light emission of the light source 2 is completed, the timing circuit 10 outputs a drive pulse to the liquid crystal panel feed mechanism 5,
The liquid crystal panel 1 is moved in the direction of arrow A by 23 μm. That is, the liquid crystal panel 1 is moved vertically by a half pitch (step 14f).

When the movement of the liquid crystal panel 1 is completed, the timing circuit 10 causes the selection circuit 87 in the storage circuit 8 to select an even field signal delayed by one horizontal period, and this signal is D / A converted to the liquid crystal panel. An image corresponding to this signal is displayed on the liquid crystal panel 1 by the drive unit 9 (step 14g).

Thereafter, the light source 2 is emitted in the same manner as described above (step 14h), the display image of the liquid crystal panel 1 is recorded on the photoconductor 4, and the liquid crystal panel 1 is moved in the direction of arrow A in the same manner as above by 23 μm.
The image signal of the odd field is displayed on the liquid crystal panel 1 by moving m, the light source 2 is emitted to record the display image of the liquid crystal panel 1 on the photoconductor 4, and the liquid crystal panel 1 is moved to the arrow A in the same manner as described above.
23 .mu.m in the direction, the image signal of the even field is displayed on the liquid crystal panel 1, the light source 2 emits light, the display image of the liquid crystal panel 1 is recorded on the photoconductor 4, and the printing operation is completed (steps 14h, 14i, 14j, 14k, 14
m, 14n, 14p, 14q).

Therefore, although the position of the liquid crystal panel 1 is different in each exposure, the photoconductor 4
In addition to the fact that the image exposed to the image does not blur, when the pixel array of the liquid crystal panel 1 is 230 pixels in the vertical direction and 420 pixels in the horizontal direction, the configuration of the exposed pixel is 4 in the vertical direction.
Since there are 60 pixels and 840 pixels in the horizontal direction, it is possible to obtain high resolution recording with an inexpensive liquid crystal panel.

That is, the inexpensive liquid crystal panel 1 is moved in parallel in one direction, an image signal corresponding to the moving position is displayed on the liquid crystal panel, and the image signal is recorded on the photoconductor. Not only is it possible to obtain a higher resolution than its own, but it is also possible to expose the area corresponding to the light-shielding portion of the liquid crystal panel on the photoconductor, so high resolution and bright recording can be obtained with an inexpensive structure.

The movement direction of the liquid crystal panel 1 by the panel feeding mechanism 5 may be opposite to that described above, and in this case, the order of outputting image information from the memory circuit 8 can be reversed.

An example in which a monochrome image is recorded has been shown above, but next, a three-dimensional image of light is introduced into the optical path from the exposure light source to the photosensitive member.
An example of color recording by arranging the filters of the colors corresponding to the primary colors (red, green, blue) by switching, exposing the photoconductors with red, green, and blue light separately, and superposing them 1
This will be described with reference to FIG.

In FIG. 15A, reference numeral 12 denotes a color signal selection circuit, which includes three types of primary color image signals corresponding to three primary colors of red, green and blue (hereinafter referred to as red, respectively) from an input color image signal for one field. Signal, a green signal, and a blue signal) are taken out, and each time a color switching signal is inputted from the timing circuit 13, one of the three types of primary color image signals is switched and output. In this example, each time a color switching signal is input from the timing circuit 13, the red signal, the green signal, and the blue signal are switched and output in this order. The timing circuit 13 controls the operation timing of each circuit by operating a print switch (not shown). Reference numeral 14 is a filter unit, and as shown in FIG. 15B, a red filter 14a and a green filter 14b.
And a blue filter 14c, and the driving circuit 14
It can be rotated around the axis 14e by d, and the respective filters are selectively arranged between the light source 2 and the photoconductor 4. The components having the same numbers as those in FIG. 1 are the same.

Next, the operation will be described with reference to FIG.
In this case, a color negative film or an instant film is used as the photoconductor 4, the color selection circuit 12 selects the blue signal, and the blue filter 14c is arranged between the light source 2 and the photoconductor 4. And Further, in this example, when the three primary colors of red, green, and blue light are superposed and exposed on the photoconductor 4, the exposure time of each color of red, green, and blue is set to 0 so that a good white balance can be obtained. .5 seconds, 1 second,
It is set to 1 second. It is desirable that the exposure time be appropriately changed depending on the spectral transmittance distribution of the filter used, the light emission spectrum of the light source, and the spectral sensitivity distribution of the photoconductor.

Similarly to the previous example, when the print switch is operated, the memory circuit 8 stores the input A / D converted image signal, and the timing circuit 13 causes the liquid crystal panel feeding mechanism 5 to move the liquid crystal panel 1 to the liquid crystal panel 1. The blue filter 14c is arranged at the initial position (upward in the drawing) and the driving circuit 14d is operated.
Instead, the red filter 14a is disposed between the light source 2 and the photoconductor 4 (steps 16a, 16b, 16c, 16).
d).

When the filter is moved, the timing circuit 1
3 outputs a color switching signal to the color signal selection circuit 12 to select a red signal, and the storage circuit 8 stores an image signal corresponding to the liquid crystal panel 1 in the initial position (in this case, an odd field delayed by one horizontal period). Signal) is output. Therefore, the color signal selection circuit 12 outputs the image signal corresponding to red among the signals of the odd fields delayed by one horizontal period. This signal is D / A converted, and the liquid crystal panel drive section 9 displays an image corresponding to this signal on the liquid crystal panel 1. That is, the liquid crystal panel 1 displays an image corresponding to the image signal corresponding to red among the signals of the odd fields delayed by one horizontal period (step 16e).

When an image corresponding to red is displayed, the timing circuit 13 operates the light source driving unit 11 to turn on the light source 2 for 0.5 seconds, and the image displayed on the liquid crystal panel 1 at this time is displayed on the photosensitive member 4. (Step 16f).

When the recording of the image corresponding to red is completed,
The timing circuit 13 arranges a green filter 14b instead of the red filter 14a between the light source 2 and the photoconductor 4 (step 16g), and outputs a color switching signal to the color signal selection circuit 12 to select the green signal. Therefore, the color signal selection circuit 12 outputs the image signal corresponding to green among the signals of the odd fields delayed by one horizontal period. Therefore, the liquid crystal panel 1 displays the image corresponding to the image signal corresponding to green among the signals of the odd fields delayed by one horizontal period (step 16h).

When an image corresponding to green is displayed, the timing circuit 13 operates the light source driving section 11 to turn on the light source 2.
It is lit for a second (step 16i), and the display image on the liquid crystal panel 1 at this time is recorded on the photoconductor 4. Therefore, the green portion of the color image is recorded so as to overlap the red portion previously recorded on the photoconductor 4.

Hereinafter, instead of the green filter 14b, the blue filter 14c is arranged between the light source 2 and the photoconductor 4, and the color signal selection circuit 12 selects blue, so that the signal of the odd field delayed by one horizontal cycle is generated. An image corresponding to blue is displayed on the liquid crystal panel 1, the light source 2 is turned on for 1 second, and the image displayed on the liquid crystal panel 1 at this time is recorded on the photoconductor 4 (steps 16j, 16k, 16m). Therefore, the blue portion is recorded on the photoconductor 4 overlapping with the red and green portions,
A color image is obtained when the liquid crystal panel 1 is in the initial position.

When the color recording at the initial position is completed, the timing circuit 10 operates the liquid crystal panel feeding mechanism 5 to move the liquid crystal panel 1 in the direction of arrow A by 23 μm and delay it by one horizontal period as in the previous embodiment. The even field signal is output from the memory circuit 8.

Hereinafter, the same operation as described above is performed on the even field signal delayed by one horizontal period. That is, 1
An image corresponding to the red signal of the even field signals delayed by the horizontal period, an image corresponding to the green signal, and an image corresponding to the blue signal are overlaid and recorded on the photoconductor 4.

When the recording of the even field signal delayed by one horizontal period is completed, the liquid crystal panel 1 is moved again by 23 μm in the direction of arrow A in the same manner as in the previous embodiment, and the same operation as described above is performed for the odd field signal. , When this is finished, the liquid crystal panel 1 is again moved to the direction of arrow A by 23 μm.
After moving, the same operation as described above is performed for the even field signal, and the printing operation is completed.

In this case as well, not only the color recording having a resolution higher than that of the liquid crystal panel itself can be obtained, but also the region corresponding to the light-shielding portion of the liquid crystal panel can be exposed on the photoconductor, so that high resolution and bright color recording can be performed. Can be obtained with an inexpensive configuration.

In the above example, the photoconductor is exposed with red, green, and blue light separately, and color recording is performed by superposing them, but next, a color filter is provided for each pixel. An example in which color recording is performed by exposing this display screen onto a photoconductor using a color liquid crystal panel described above will be described with reference to FIG.

In the figure, reference numeral 15 is a color liquid crystal panel having pixels in a matrix which constitutes an optical shutter panel, and displays a color image signal of a television or the like.
Generally, in the case of a relatively inexpensive liquid crystal panel used as a projector or a viewfinder, it has a size of about 1 inch, about 230 pixels in the vertical direction, and 4 pixels in the horizontal direction.
A color image corresponding to one field of a television signal is formed by arranging one of red (R), green (G), and blue (B) filters in each pixel. Can be displayed. In such a color liquid crystal panel, since the degree of integration is high, the proportion of the light-shielding area due to the wiring or the like is large, and the proportion of the entire opening is 2%.
It is about 5 to 50%. In this example, the aperture ratio is about 25%
And has 230 pixels in the vertical direction and 420 pixels in the horizontal direction, the size of one pixel is 16 μm in the horizontal direction and 25 μm in the vertical direction, and has a checkered pixel array as shown in FIG. A light transmissive color liquid crystal panel in which any one of R, G, and B filters is arranged is used, and is driven by a liquid crystal panel drive unit 9.

Reference numeral 16 is a diffraction grating which constitutes an optical control means, and for example, a diffraction grating in which concavities and convexities of a predetermined pitch are formed on a glass substrate is used. In this case, it is desirable that the first-order diffracted image 19a is set so as to be located in the gap between pixels in the horizontal direction as shown in FIG. The diffraction grating 16 does not have to be installed, and irregularities may be formed in the vertical and horizontal directions to form the first-order diffraction image 20a in the vertical and horizontal directions as shown in FIG. In this example, an image is formed at a point separated by ½ of the pixel interval in the horizontal direction.
The components having the same numbers as those in FIG. 1 are the same.

Next, the operation will be described with reference to FIG.
In this example, a color negative film or an instant film is used as the photoconductor 4.

When a print switch (not shown) is operated, the timing circuit 10 operates the memory circuit 8,
The color image signal for one frame to be input is stored.

When the recording of the color image signal is completed, the color liquid crystal panel 15 and the diffraction grating 16 are set at the initial positions, and a color image corresponding to the color signal of the odd field delayed by one horizontal period is displayed on the color liquid crystal panel 15. The image is displayed, the light source 2 is turned on, and the color image is recorded on the photoconductor 4.

Thereafter, the same operation as in the first embodiment is performed, and an image corresponding to the moving position of the color liquid crystal panel 15 is recorded on the photosensitive member 4.

In this case, since the image recorded on the photoconductor 4 is mixed by the diffraction grating 16 as shown in FIG. 22, a bright hard copy can be obtained.

In this case, in addition to the same effects as the above example, the range of influence of diffraction can be made smaller than that of the conventional one shown in FIG. 23, so that the resolution can be greatly improved.

When such a color liquid crystal panel 15 is used, if the liquid crystal panel 15 is moved a number of times corresponding to the pixel arrangement of each color as shown in FIG. Regions corresponding to the pixels of the liquid crystal panel and the light-shielding portion in the gap between them can be exposed by overlapping the respective colors of R, G and B. In this example, recording is performed by exposing 12 times while moving in the arrow direction 11 times by half the pitch between pixels. For example, regarding the recording position on the photoconductor corresponding to the pixel D, green is recorded by the exposure in the illustrated state, blue is recorded by four movements, and red is recorded by eight movements. Therefore, in this case, the number of pixels on the photoconductor becomes small, so that the resolution can be increased in addition to the above-described effect, and the optical control means such as the diffraction grating used in the previous example can be eliminated, and thus the configuration can be improved. It can be simplified. In this case, as the liquid crystal panel feeding mechanism,
The one shown in FIG. 25 may be used. Referring to FIG. 25, reference numerals 251 and 252 denote timing belts. The timing belt 251 transmits the rotation of the stepping motor 514 to the shaft 55, and the timing belt 252 transmits the rotation of the shaft 55 to the shaft 54. In the same figure, those having the same numbers as in the previous figure are the same.

In each of the above examples, the liquid crystal panel is moved with respect to the photoconductor, but the invention is not limited to this, and the photoconductor may be moved with respect to the liquid crystal panel. The optical system for forming the projected image on the photoconductor may be moved to move the image forming position of the projected image on the photoconductor.

Further, although the pixel array of the liquid crystal panel is in a checkered pattern in each of the above examples, it is not limited to this, and for example, as shown in FIG.
It may be arranged in a stripe pattern as shown in FIG. In this case, the same effect as above can be obtained by moving the liquid crystal panel as shown in FIG. The liquid crystal panel moving mechanism in this case can be realized by tilting the liquid crystal panel so that the moving direction of the pixel and the direction of the shaft shown in FIG. 5 are parallel. Even when the pixel array has a checkered pattern, the moving direction is not limited to the above, and may be moved as shown in FIG. 27, for example.

Further, as a liquid crystal panel, 480 is vertically provided.
Even when using a liquid crystal panel having a number of pixels of about one pixel and capable of displaying an image corresponding to one frame, it is possible to improve the aperture ratio by exposing the frame signal twice instead of exposing the even and odd field signals respectively. The resolution in the horizontal direction can be improved.

Further, the size and pitch of the pixels of the liquid crystal panel are not limited to the above and can be changed as appropriate.

[0068]

According to the invention of the recording apparatus of the present application, a high quality recording apparatus can be realized.

In particular, high quality color recording can be obtained by providing pixels corresponding to the three primary colors of light.

Further, if the projected images of the pixels corresponding to at least three adjacent primary colors of light are overlapped and exposed on the photoconductor, color recording with higher resolution can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention.

FIG. 2 is a detailed view of a main part of FIG.

FIG. 3 is an explanatory diagram for explaining movement of the liquid crystal panel 1 of FIG.

FIG. 4 is a detailed view of a main part of FIG.

FIG. 5 is a detailed view of a main part of FIG.

6 is a plan view in the direction of arrow A in FIG.

FIG. 7 is an explanatory diagram showing an example of an image signal used in the present invention.

8 is an explanatory diagram showing a storage example of the image signal shown in FIG.

9 is an explanatory diagram showing an example of a signal output from a memory circuit 8 in FIG.

10 is an explanatory diagram showing a recording state of the photoconductor 4 of FIG. 1. FIG.

11 is an explanatory diagram showing a recording state of the photoconductor 4 of FIG. 1. FIG.

12 is an explanatory diagram showing a recording state of the photoconductor 4 of FIG.

FIG. 13 is an explanatory diagram showing a recording state of the photoconductor 4 of FIG.

FIG. 14 is a flowchart for explaining the operation of FIG.

FIG. 15 is an explanatory view showing another embodiment of the present invention.

16 is a flowchart for explaining the operation of FIG.

FIG. 17 is an explanatory view showing still another embodiment of the present invention.

FIG. 18 is a detailed view of a main part of FIG.

19 is an explanatory diagram showing a diffraction image of the diffraction grating of FIG.

20 is an explanatory diagram showing another diffraction image of the diffraction grating of FIG.

21 is a flowchart for explaining the operation of FIG.

22 is an explanatory diagram showing a recording example of the photoconductor of FIG.

FIG. 23 is an explanatory diagram showing an example of recording on a conventional photoconductor.

FIG. 24 is an explanatory diagram for explaining the operation of still another embodiment of the present invention.

FIG. 25 is an explanatory view of a main part of still another embodiment of the present invention.

FIG. 26 is an explanatory view showing a part of another embodiment of FIG.

FIG. 27 is an explanatory view showing a part of another embodiment of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 optical shutter panel 2 light source 3 optical means 4 photoconductor 5 moving means 7, 8, 9 image signal control means 11 light source driving means 7, 8, 9, 12 image signal control means 15 optical shutter panel 16 optical control means

Claims (3)

[Claims] 1. An optical shutter panel having a plurality of pixels arranged in a matrix in which a light transmission state or a light blocking state is selectively received in response to an image signal, and a light shielding portion is provided between each pixel, A light source for irradiating the shutter panel, an optical means for forming an image on the photoreceptor by projection of the projection image transmitted through the optical shutter panel by the irradiation of the light source, and an image forming position of the projection image on the photoreceptor. Moving means for moving the image signal, image signal control means for supplying an image signal corresponding to the image forming position to the pixel by the moving means, and a light source for causing the light source to emit light in synchronization with the supply of the image signal to each pixel. A recording apparatus comprising: a driving unit. 2. The recording apparatus according to claim 1, wherein the pixels are provided corresponding to each of the three primary colors of light. 3. The recording apparatus according to claim 2, further comprising an optical control unit that superimposes projection images of pixels corresponding to at least three adjacent primary colors of light and exposes the projected images on the photoconductor.