JPH0980376A - Method and device for liquid crystal color image formation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a color image of good finish quality speedily. SOLUTION: When a display image is formed by an image signal processing part, color signals based upon color components of R, G, and B of the display image corresponding to respective liquid crystal elements 21 are set and a luminance signal Y is set on the basis of them. Exposure with the luminance signal Y is performed plural times with a specific exposure quantity while an effective transmission area 21B is moved along the peripheral edges of the liquid crystal elements 21 and exposure with a correction color signal RGB as a color component difference is performed for every correction color signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal color image forming method and a liquid crystal color image forming apparatus, and more particularly, to a liquid crystal color image forming method for forming an image by controlling the degree of transmission of each liquid crystal element arranged vertically and horizontally. The present invention relates to a method and a liquid crystal color image forming apparatus.

[0002]

2. Description of the Related Art Conventionally, there is a liquid crystal display device applied to a television monitor or the like. A liquid crystal display device is assembled by using a liquid crystal panel as a main component. This liquid crystal panel is applied to a printer that displays a digital image and projects the transmitted image onto a photosensitive material for printing.

A liquid crystal panel is composed of a plurality of liquid crystal elements arranged vertically and horizontally. An image is displayed on a liquid crystal panel by electrically controlling the transmission state of these liquid crystal elements, and exposure light is transmitted through such a liquid crystal panel to print an image on a photosensitive material. There is.

However, since the liquid crystal element constituting the liquid crystal panel electrically controls the transmission state, each liquid crystal element is provided with a black stripe portion corresponding to a wiring portion in manufacturing. This black stripe portion cannot transmit the exposure light regardless of electrical control. Therefore, when a print is obtained by exposing the liquid crystal panel with the exposure light, the portion corresponding to the black stripe portion becomes blank. , It may stand out on the print.

Therefore, the liquid crystal panel is moved so that the effective light transmitting portion of the liquid crystal element overlaps the black stripe portion, and the same portion on the photosensitive material is exposed a plurality of times to eliminate the unexposed area on the print. A method for obtaining an image with high resolution and high quality with no white spots has been proposed.

However, to obtain a color image, R,
Since it is necessary to perform the exposure with each of the G and B color signals, when moving and exposing as described above, the number of times of exposure required for one color signal is tripled. For example, when one color signal is exposed four times, the total is 12 times. Therefore, the number of exposures increases and the processing time cannot be shortened.

[0007]

SUMMARY OF THE INVENTION In consideration of the above facts, it is an object of the present invention to provide a liquid crystal color image forming method and a liquid crystal color image forming apparatus which can quickly obtain a color image of good quality. .

[0008]

A liquid crystal color image forming method according to claim 1, wherein a plurality of rows and columns are arranged vertically and horizontally with a predetermined pitch dimension, each of which has an effective light transmitting area and at least a light non-transmitting area caused by wiring. In a liquid crystal color image forming method, an image is displayed on a liquid crystal panel composed of a liquid crystal element group according to a transmission state of the effective light transmission region, and a color image is printed on a photosensitive material by exposure with exposure light, A primary color signal RGB in a display image is decomposed into an R signal, a G signal, and a B signal, and a luminance signal Y based on the separated color signals and correction color signals RGB obtained by subtracting the luminance signal Y from the primary color signal RGB. The liquid crystal panel is movable with respect to a predetermined printing area on the photosensitive material so that the effective light transmitting areas of the liquid crystal element are located at the four corners of the liquid crystal element. With exposure according to the luminance signal Y in, it is characterized by, for exposure in accordance with the correction color signals RGB in one predetermined position.

According to this, the luminance signal Y is obtained from each of the R, G and B color signals necessary for printing a color image, a plurality of exposures based on the luminance signal Y and the luminance signal from each color signal. Exposure is performed based on the corrected color signals RGB obtained by subtracting Y. In the case of exposure based on the luminance signal Y, the effective light transmitting areas of the liquid crystal element are moved so as to be located at the four corners of the liquid crystal element, and the exposure is performed on a predetermined printing area on the photosensitive material. As a result, the total number of exposures is set to R, G, B
It can be reduced compared to the case of exposing while moving for each. Therefore, it is possible to quickly obtain a color image having a good finished quality without any unexposed portions on the photosensitive material.

According to a second aspect of the present invention, there is provided a liquid crystal color image forming apparatus which comprises a plurality of liquid crystal elements arranged vertically and horizontally at a predetermined pitch and each having an effective light transmitting region and at least a light non-transmitting region caused by wiring. LCD panel,
A color filter for giving each color light of R, G, B, and displaying an image on the liquid crystal panel according to the transmission state of the effective light transmitting region, and exposing the photosensitive material to a predetermined image by exposure light. In a liquid crystal color image forming apparatus for printing a color image on a region, the liquid crystal panel is moved so as to be movable in X and Y directions on an array plane so that effective light transmitting regions of the liquid crystal device are located at four corners of the liquid crystal device. Mechanism, moving means for giving a predetermined amount of movement to the moving mechanism, and primary color signals of an image displayed on the liquid crystal panel are separated into R, G, and B color signals, and a luminance signal Y is generated based on the color signals. And a signal processing unit that calculates the correction color signals RGB by subtracting the luminance signal Y from each of the color signals, and moves to the moving unit when exposing the liquid crystal element based on the luminance signals. Give instructions It is characterized by having a movement control means.

According to this, when a color image is printed by a color filter using a liquid crystal panel composed of a liquid crystal element group, when the movement control means performs exposure based on the luminance signal Y, the liquid crystal is used. Exposure is performed by moving the panel in the X and Y directions on the array plane so that the effective light transmission regions of the liquid crystal element are located at the four corners of the liquid crystal element. The luminance signal Y can be obtained in the signal processing unit based on the color signal. As a result, the exposure based on the luminance signal Y is performed a plurality of times on the predetermined printing area, and the correction color signal RG is obtained.
Each B-based exposure can be performed once to obtain a color image. Therefore, the number of exposures can be reduced, and a color image with a simple structure can be printed quickly and with high quality.

A liquid crystal color image forming apparatus according to a third aspect of the invention is characterized in that the moving means is a piezoelectric element.

According to this, since the liquid crystal panel can be moved by the piezoelectric element, the structure of the device can be simplified and the size of the device can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The liquid crystal color image forming method and apparatus of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a liquid crystal image forming apparatus 1 according to an embodiment of the present invention.
0 is shown.

The liquid crystal image forming apparatus 10 includes a print unit 1
2 are provided. The printing unit 12 is provided with a light source 14 for exposure, and the light source 14 is composed of a halogen lamp and a reflector. A color separation filter 16 for each color of R (red), G (green), and B (blue) is arranged on the burning optical axis L of the light source emitted from the light source 14. Each of these color separation filters 16 is inserted into or removed from the optical axis L according to a signal from the driver 18.

A liquid crystal panel 20, which will be described later, is provided on the printing optical axis L below the color separation filter 16. A liquid crystal panel driver 22 is connected to the liquid crystal panel 20 to control a transmission state of a liquid crystal element 21 (see FIG. 5) in the liquid crystal panel 20 according to a signal from the controller 24.

The liquid crystal panel 20 includes the liquid crystal panel 2
A liquid crystal panel moving unit 26 for moving 0 in a plane indicated by a chain line M in FIG. 1 is provided. Liquid crystal panel moving unit 26
Is a transfer means such as PZT (pbTiO ₃ and pb
Piezoelectric elements 28, 64 (see FIGS. 2 and 3) such as a mixed crystal with ZrO ₃ ) and a polymer film (for example, vinylidene fluoride) are applied, and these are controlled by the controller 24. ing.

The printing optical axis L below the liquid crystal panel 20 is
A black shutter 34 is arranged so as to sandwich the printing lens 32. The black shutter 34 is opened / closed in response to a drive signal from the driver 36, and passes or blocks light on the printing optical axis L. Also, the lens 32 is
It is possible to move along the optical axis L, so that the enlargement magnification can be changed.

A photographic printing paper 38 is disposed below the black shutter 34 and below the printing optical axis L. The photographic printing paper 38 is sandwiched by the transport rollers 40 and is transported by the drive of the transport rollers 40. When the photographic printing paper 38 is transported by a predetermined transport amount and a predetermined printing area on the photographic printing paper 38 is arranged on a predetermined exposure stage below the optical axis L, the driving of the transport roller 40 is stopped, and the exposure stage is exposed. The printing area is positioned above. One end of the printing paper 38 is wound in layers on a rotation shaft (not shown).

The liquid crystal image forming apparatus 10 is provided with a negative image storage section 30. An image reading device (not shown) is connected to the negative image storage unit 30. The negative image storage unit 30 stores the negative image read by the image reading device as image data. The negative image storage unit 30 is connected to the controller 24, and the image data to be printed is selected from the stored image data and transmitted to the controller 24.

Next, the structure of the liquid crystal panel 20 and its peripheral portion will be described with reference to FIGS. 2 and 3.

The liquid crystal panel 20 comprises a support plate 20A and a display surface 20B. The support plate 20A is formed in a frame shape. A rectangular hole provided in the center of the support plate 20A holds the display surface 20B. A wiring board (not shown) is attached to the support plate 20A. Display surface 2
In 0B, the transmission state is controlled by electrical means,
A large number (about 510,000 as an example) of liquid crystal elements 21 (see FIG. 5) capable of displaying white, black, and an intermediate color thereof have a predetermined pitch dimension (the other liquid crystal elements 21 adjacent from the center of one liquid crystal element 21). (Distance to the center of the) is arranged in a matrix. The pitch dimension of the liquid crystal element 21 can be set to 40 μm, for example.

A pair of block members 42 are arranged on one opposite side of the liquid crystal panel 20. The block member 42 is provided with an insertion opening 46 having an opening area approximately equal to the side surface of the liquid crystal panel 20, and the opposite side end portion of the liquid crystal panel 20 is inserted therein. The insertion port 46 penetrates to the opposite surface of the block member 42, and the plate member 44 is attached to the opposite surface.

Here, an auxiliary member 48 is attached to the plate member 44 corresponding to one of the block members 42 so as to face the opening surface of the insertion opening 46, and the opposing surface of the auxiliary member 48 facing the insertion opening 46 is A piezoelectric element 28 is arranged. The auxiliary member 48 and the piezoelectric element 28 are fitted in the insertion opening 46. The auxiliary member 48 and the plate member 44 may be fixed to each other by using a screw or the like, or by an adhesive or the like. The piezoelectric element 28 is in contact with the width direction side surface of the liquid crystal panel 20 so as to face each other inside the block member 42, and the amount of movement in the width direction (X direction on the arrangement plane of the liquid crystal elements 21) set by the control unit, The liquid crystal panel 20 can be moved.

A pressing member 52 is arranged on the other plate member 44 through a compression coil spring 50, and the insertion port 46 is inserted.
It is housed in. One end of the compression coil spring 50 between the pressing member 52 and the plate member 44 is housed in a circular groove 54 provided in the plate member 44, and the other end is in contact with the pressing member 52. As a result, the liquid crystal panel 20 is pressed by the pressing member 52 in the direction of coming into contact with the piezoelectric element 28.

The pair of block members 42 are used for the liquid crystal panel 20.
Are screwed to the pair of fixing plates 56 arranged on the other opposite sides of the. Brackets 60 are attached to the outer surface of one of the fixing plates 56 at a predetermined interval, and a piezoelectric element 64 attached to an auxiliary member 62 is arranged on the surface facing the fixing plate 56 so as to contact the fixing plate 56. ing. The piezoelectric element 64 is set in the longitudinal direction (Y direction on the array plane of the liquid crystal elements 21) set by the control means.
The liquid crystal panel 20 can be moved through the fixed plate 56 and the block member 42 by the amount of movement.

A coaxial circular hole is provided in each of the pair of fixing plates 56 and the bracket 60, and a shaft 66 extends therethrough. The end of the shaft 66 is locked by an E-shaped ring 68 near the bracket 60 to prevent movement in the axial direction.

A compression coil spring 70 is attached to a shaft 66 between the fixing plate 56 and the bracket 60 on the side opposite to the side where the piezoelectric element 64 is arranged. The compression coil spring 70 has a function of urging the liquid crystal panel 20 in a direction of coming into contact with the piezoelectric element 64 via the fixing plate 56.

As a result, as shown in FIG.
Normally, the liquid crystal panel 20 is in contact with the piezoelectric element 28 and the fixing plate 56 is in contact with the piezoelectric element 64 (reference position (0, 0)), and when only the piezoelectric element 28 acts, the liquid crystal panel 20 becomes (x , 0) direction and only the piezoelectric element 64 acts, the liquid crystal panel 20 is moved in the (0, y) direction together with the block member 42 and the fixing plate 56, and the piezoelectric element 2 is moved.
8 and the piezoelectric element 64 work together, the liquid crystal panel 20
Will move in the (x, y) direction.

As described above, the liquid crystal image forming apparatus 10 is provided with the controller 24 which performs various processes.

As shown in FIG. 4, the controller 24 is
The negative image storage unit 30 is connected to the negative image storage unit 30, and the negative image storage unit 30 transmits image data to be printed to the controller 24 based on an instruction from the controller 24. The controller 24 is provided with an image input unit 80, and the image data transmitted from the negative image storage unit 30 is input to the controller 24 by the image input unit 80.

The image input section 80 includes an image signal processing section 82.
Is connected. The image signal processing unit 82 forms a display image for the negative image input to the controller 24, and sets the transmission state of each liquid crystal element 21 based on the designated display image. Accordingly, depending on the set transmission state of each liquid crystal element 21,
A display image can be displayed on the liquid crystal panel 20.

An arithmetic unit 84 is connected to the image signal processing unit 82. The calculation unit 84 is configured to calculate each color signal for displaying a color image with respect to the input image signal. Here, from the primary color signal of the displayed image,
The luminance signal Y and the corrected color signal corrected based on the luminance signal Y are calculated based on the processing described later.

The calculation section 84 is connected to the image sticking control section 86. The image sticking control unit 86 is connected to the color separation filter 16 via the driver 18 and to the liquid crystal panel 20 via the liquid crystal panel driver 22. This allows the color separation filter 16 to be inserted and the liquid crystal panel 20 to be inserted.
By controlling the display of the above image, a predetermined exposure is performed based on each correction color signal and the luminance signal Y, and a color image can be printed on a predetermined printing area on the printing paper 38.

The print controller 86 includes piezoelectric elements 28, 64.
The movement control unit 88 connected to (see FIG. 3) is connected. As a result, the movement control unit 88 causes the image sticking control unit 86.
The piezoelectric elements 28 and 64 are switched between the energized state and the non-energized state according to the signal from, and the liquid crystal panel 20 is moved in a predetermined direction by a predetermined amount.

Next, the color image forming process will be described. In the liquid crystal image forming apparatus 10, the image primary color signals input to the image input unit 80 of the controller 24 are converted into R, G, and
A color signal for each color component of B is obtained to obtain a color signal for each color component, and a luminance signal Y is obtained based on each color component.
A color image is formed on the photographic printing paper 38 by the addition method based on the corrected color signal excluding the luminance signal Y and the corrected color signal.

As shown in FIG. 5A, one liquid crystal element 21 has a black stripe portion 21A as a wiring portion having a surface area of about 53% and an effective transmission region 21B. The movement control unit 88 of the controller 24 controls the movement direction and the movement amount so that the image after the liquid crystal panel 20 is moved is printed on the printing area on the printing paper 38 corresponding to the black stripe portion 21A. There is.

The movement set by the movement control unit 88 is
At least the black stripe portion 2 of the liquid crystal element 21 of No. 1
It is set in a direction along one side of 1A and within the width dimension of the one side. As a result, the effective transmission area 21B moves along the peripheral edge of the liquid crystal element 21 and is arranged at the four corners of the liquid crystal element 21, and the exposure light transmitted through the liquid crystal element 21 after the movement is exposed by the black stripe portion 21A before the movement. The part that was not exposed is exposed.

As shown in FIG. 5B, the printing paper 38
In a predetermined printing area (area indicated by a dotted line in FIG. 5 (B)) of, exposure by a correction color signal based on each color component (upper part of FIG. 5B) and obtained based on each color signal A color image is formed by exposure with the luminance signal Y (lower part of FIG. 5B).

FIG. 6 (A) schematically shows each color component set as a color signal. Image signal processing unit 8
The primary color components of the display image generated in 2 are R,
The color components of G and B are separated and set as color signals. On the other hand, the luminance signal Y is a mixed component of R, G, and B color components. That is, when generating the primary color signal,
Only the color signals that cause each color difference are generated by each exposure based on each corrected color signal by inserting only the corresponding color separation filter 16 on the optical axis L, and the color signals that do not cause a color difference are generated by the color separation filter 16. All are inserted on the optical axis L and generated by exposure based on the luminance signal Y.

Each color signal RG obtained by dividing the primary color component
When B is obtained in the calculation unit 84, the luminance signal Y is calculated based on the following equation (1).

[0042]

## EQU1 ## Y = R × 0.3 + G × 0.59 + B × 0.11 (1) Y: luminance signal R: R signal in display image G: G signal in display image B: B signal in display image When the luminance signal Y is obtained based on the above equation, the exposure amount (Ey) is determined based on the exposure time and the number of exposures. When the exposure amount (Ey) by the luminance signal Y is determined, each color signal is corrected based on this, and the exposure amount of each color is calculated by the following equation (2).
Get based on.

[0043]

## EQU00002 ## R = Er-Ey G = Eg-Ey (2) B = Eb-Ey Ey: Exposure amount by luminance signal Y Er: Exposure amount by corrected R color signal Eg: G after correction Exposure amount by color signal Eb: Exposure amount by B color signal after correction As shown in FIG. 5B, the liquid crystal element 21 is set to move in the x direction and the y direction, respectively. In addition to the movement, the exposure processing is performed by the correction color signal and the luminance signal Y obtained by the above formula.

That is, the original position before the movement, the movement position to (0, y) by the piezoelectric element 64 (see FIG. 3), the piezoelectric element 28.
And 64, moving position to (x, y) and piezoelectric element 2
The luminance signal Y at the position moved to (x, 0) by 8
Exposure is performed. On the other hand, the exposure with the correction color signal is performed with the R, G, and B correction color signals at the original position. As a result, the printing area on the printing paper 38 corresponding to the liquid crystal element 21 defined along the periphery of the liquid crystal element 21 is entirely exposed by the exposure light transmitted by the effective transmission area 21B of the liquid crystal element 21. It is like this.

Therefore, when a display image is formed in the image signal processing section 82, color signals based on the R, G, B color components corresponding to the respective liquid crystal elements 21 of the display image are set, and the luminance is based on this. The signal Y is set. The exposure with the luminance signal Y is performed a plurality of times by moving the effective transmission region 21B along the peripheral edge of the liquid crystal element 21 with a predetermined exposure amount, and the exposure with the correction color signal RGB that is a color component difference is performed with each correction color signal. This is performed for each RGB. As a result, the printing paper 38 corresponding to the black stripe portion 21A that occupies a part of the liquid crystal element 21.
The image can be printed without causing the blank areas above.

Next, the operation of this embodiment will be described. When the image data to be subjected to the printing exposure, which is temporarily stored in the negative image storage unit 30, is transmitted to the liquid crystal panel driver 22 via the controller 24, the liquid crystal panel driver 2
2 is operated, a negative image is formed on the liquid crystal panel 20 composed of the liquid crystal elements 21 arranged in a matrix based on the transmitted image data, and a color image is formed according to the color image forming process described below. The image is printed on the printing paper 38.

The formation of a color image in this embodiment will be described below with reference to FIG.

When the color image stored in the negative image storage section 30 is to be printed, the image data of the image printed on the printing paper 38 is input to the controller 24 in step 100.

When the image data is input, step 102
In, a display image formed on the display surface of the liquid crystal panel 20 is formed based on the image data, and in step 104, a color component for printing the display image based on the color image on the photographic printing paper 38 is set. The image displayed by each liquid crystal element 21 is set as a transmission state for each of the R, G, and B color components generated by the color separation filter 16.

When the color component of each liquid crystal element is set, the luminance signal Y is calculated and determined in step 106 based on the set color component. The equation (1) described above is applied to the calculation of the luminance signal Y.

When the luminance signal Y is determined, step 10
At 8, the corrected color signal RGB is determined by subtracting the determined luminance signal Y from each color signal. Color signals are each R,
It is determined for each of G and B, and is determined by correcting the color signal based on the color component set based on the image data based on the exposure amount by the luminance signal Y (Equation (2)).
reference).

When the corrected color signals RGB are determined, in step 110, an image is displayed based on the luminance signal Y,
In step 112, the color separation filters 16 are all inserted on the optical axis L, and a predetermined printing area of the photographic printing paper 38 positioned on the exposure stage is exposed by the luminance signal Y. Here, the exposure amount by the luminance signal Y is adjusted in advance so that the exposure process is performed four times in the present embodiment, so that the exposure amount is adjusted to be an appropriate exposure amount by the four exposure amounts.

When the exposure process using the luminance signal Y is completed,
In step 114, it is judged whether or not the exposure has been carried out by the movement of the luminance signal Y four times. If the exposure of the luminance signal Y accompanied by the movement of four times has not been completed, the determination is negative and the routine proceeds to step 116, where the selected piezoelectric elements 28 and 64 are corresponding to the set movement direction. Is energized, a predetermined amount of movement is given from the movement control unit 88 of the controller 24 to the liquid crystal panel moving unit 26 via the piezoelectric element 28, and the liquid crystal panel 20 is moved.

When the liquid crystal panel 20 is moved, step 1
Returning to step 12, exposure processing is performed using the luminance signal Y at the moving position. The exposure process using the luminance signal Y is performed a total of four times by moving by a set moving amount according to a preset moving order. When the exposure with the luminance signal Y is completed four times, the determination in step 114 is affirmed, and the process proceeds to step 118.

In step 118, an image is displayed on the liquid crystal panel 20 on the basis of the predetermined one corrected color signal RGB of R, G and B. Along with this, only the corresponding color separation filter 16 is inserted on the optical axis L.

When the image based on the corrected color signal RGB is displayed, in step 120, the exposure process based on the displayed corrected color signal RGB is performed. At this time, since the liquid crystal panel 20 does not move, the exposure process is performed at the specified position.

When the exposure processing with the predetermined one correction color signal RGB is completed, in step 122, R, G, B
It is determined whether or not the exposure processing using all the correction color signals RGB has been completed. If the exposure processing based on all the correction color signals has not been completed, the determination is negative and the process proceeds to step 124.

In step 124, R which is not completed,
An image is displayed on the liquid crystal panel 20 based on the correction color signal RGB of one of G and B, and the process returns to step 120, and the exposure process is performed by the displayed correction color signal RGB.

On the other hand, when the exposure process using all the correction color signals RGB is completed, the determination at step 122 is affirmative, and the series of color image forming processes is completed.

In the color image forming process, the printing paper 38
Are not transported in the positioned state. Therefore, in the predetermined printing area on the photographic printing paper 38, the 4
By performing the exposure process once and the exposure process using the corrected color signals RGB three times, the images obtained by the total of seven exposure processes are superimposed and printed, and a clear color image can be obtained.

In the exposure processing involving movement, the processing is completed quickly regardless of the processing order, that is, the movement order in the exposure with the luminance signal Y and the exposure order of the exposure with the luminance signal Y and the exposure with the correction color signal RGB. A high quality color image can be obtained. Further, either the movement to the movement position or the display of the negative image at the movement position may be performed first.

In this embodiment, the luminance signal Y is expressed by the equation (1).
, But is not limited to this equation (1).

For example, as shown in FIG. 6B, instead of obtaining the luminance signal Y according to the above equation (1), the R, G, B signals having the lowest color signals are used as the pseudo luminance signal Y '. You can also As a result, the correction color signal RG
The exposure of B three times can be performed twice to be a total of six times, and a color image having a similar finished quality can be obtained more quickly.

In the present embodiment, a piezoelectric element that can be easily electrically controlled and has a compact structure is used as the moving means. However, it is limited to this as long as the movement of the liquid crystal panel 20 can be given to the moving mechanism. Absent.

In this embodiment, the liquid crystal panel 20 is used.
Although an image forming apparatus having one exposure stage is used, for example, one photographic printing paper 38 has two exposure stages, and on the other hand, an image printing unit for exposing a normal negative film. It may be applied to a so-called index printer. As a result, it is possible to obtain an index print with better finished quality.

[0066]

As described above, according to the present invention, it is possible to quickly obtain a color image having a good finished quality.

Further, it is possible to easily obtain a color image with a good finished quality while reducing the size of the apparatus.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view showing structures of a liquid crystal panel and its peripheral portion of the liquid crystal image forming apparatus according to the present embodiment.

FIG. 3A is a plan view showing a structure of a liquid crystal panel and its peripheral portion of the liquid crystal image forming apparatus according to the present embodiment,
FIG. 3B is a characteristic diagram when the movement of the liquid crystal panel of FIG.

FIG. 4 is a conceptual diagram showing a control system of the liquid crystal image forming apparatus according to the present embodiment.

5A is a schematic view of a liquid crystal element forming a liquid crystal panel of the liquid crystal image forming apparatus according to the present embodiment, and FIG.
FIG. 4 is a conceptual diagram illustrating a color image forming process according to this embodiment.

FIG. 6A is a diagram conceptually illustrating a relationship between each color signal and a luminance signal, and FIG. 6B is a diagram conceptually describing another relationship between each color signal and a luminance signal.

FIG. 7 is a flowchart illustrating a liquid crystal image forming process according to another embodiment of the present invention.

[Explanation of symbols]

 10 Liquid Crystal Image Forming Apparatus 12 Print Section 16 Color Separation Filter (Color Filter) 18 Driver 20 Liquid Crystal Panel 21 Liquid Crystal Element 21A Black Stripe Section 24 Controller (Liquid Crystal Element Control Means) 26 Liquid Crystal Panel Moving Section (Movement Mechanism) 28 Piezoelectric Element (Movement) Means) 64 Piezoelectric element (moving means) 82 Image processing section 84 Computing section (signal processing means) 86 Burning control section (movement control means) 88 Movement control section (movement control means)

Claims (3)

[Claims] 1. A liquid crystal panel comprising a plurality of liquid crystal elements arranged vertically and horizontally at a predetermined pitch and each having an effective light transmission region and at least a light non-transmission region caused by a wiring. In a liquid crystal color image forming method in which an image is displayed according to the transmission state of an area and a color image is printed on a photosensitive material by exposure with exposure light, primary color signals RGB in a display image are converted into R signal, G signal and B signal. A luminance signal Y based on the decomposed color signals and the corrected color signals RG obtained by subtracting the luminance signal Y from the primary color signals RGB.
B is determined, and the liquid crystal panel is movable with respect to a predetermined printing area on the photosensitive material so that the effective light transmitting areas of the liquid crystal element are located at the four corners of the liquid crystal element. Exposure and the correction color signal RG at a predetermined position.
Exposing according to B. A method for forming a liquid crystal color image, comprising: 2. A liquid crystal panel comprising a plurality of liquid crystal elements arranged vertically and horizontally at a predetermined pitch and each having an effective light transmitting region and at least a light non-transmitting region caused by wiring, and R, G and B. A color filter for giving each color light of, and an image is displayed on the liquid crystal panel according to the transmission state of the effective light transmission region, and a color image is displayed on a predetermined printing region on the photosensitive material by exposure light. In a liquid crystal color image forming apparatus for printing, the liquid crystal panel is provided with X and Y on an array plane so that effective light transmission regions of the liquid crystal element are located at four corners of the liquid crystal element.
A moving mechanism capable of moving in any direction, moving means for giving a predetermined moving amount to the moving mechanism, and R, G, primary color signals of an image displayed on the liquid crystal panel,
B color signals are separated into luminance signals Y based on the color signals.
And a signal processing unit that subtracts the luminance signal Y from each of the color signals to calculate each correction color signal RGB, and moves to the moving unit when exposing the liquid crystal element based on the luminance signal. And a liquid crystal color image forming apparatus having: 3. The liquid crystal color image forming apparatus according to claim 2, wherein the moving means is a piezoelectric element.