JP2000187275A - Image storing device and image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge or reduce the original image of a film to a desired magnification, to store it in a storage means and to display it by providing a control means for controlling a projection optical system, so as to change the projection magnification of the image to the storage means. SOLUTION: This projection optical system is constituted of lenses 30 and 31 and two reflecting mirrors 40 and 41 arranged on both sides of the optical axis direction of the lenses 30 and 31. The device is provided with a CPU which controls the projection optical system, so as to change the projection magnification of the image to a spatial light modulation element(SLM) 10 which is the storage means. Then, the CPU changes the projection magnification by moving to advance/retreat the lenses 30 and 31 in a direction orthogonal to the optical axis with respect to the optical path of the projection optical system (desirably, in a direction parallel with the longitudinal direction of the film) according to information recorded in the magnetic recording part of the film 12. Since the projection magnification can be changed in this way, the original image of the film is enlarged or reduced to the desired magnification, stored in the SLM 10 and displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spatial light modulator (Spatiallight M)
The present invention relates to an image storage device and an image display device having storage means such as an odulator (SLM).

[0002]

2. Description of the Related Art Generally, a film photographed by a camera is developed and printed on photographic paper and viewed as a photograph. However, recently, a film image is electronically read by a film scanner or the like, and the film image is read. 2. Description of the Related Art Devices capable of viewing electronic images on a television or the like are used. Since similar devices do not have an image storage means, the displayed film image is erased when the power is turned off.

Further, the present applicant has proposed an image display device in which a film image photographed by a camera is stored in a spatial light modulator and is viewed. This image display device illuminates the photographed and developed film from behind with a light source such as a xenon tube, and projects the transmitted light to a spatial light modulator through an enlarged projection optical system including a projection lens and a reflection mirror. ,
Writing of a film image to the spatial light modulator is performed.
Here, the spatial light modulator is composed of a ferroelectric liquid crystal, a photoelectric conversion film, and the like, and can store image information written by a memory function of the ferroelectric liquid crystal for a long time.

When a viewer views a film image captured by a camera or the like using the above-described image display device, the spatial light modulator on which the film image is written is projected in the direction in which the film image is projected using a fluorescent lamp or the like (see FIG. 1). Backlight from the middle right direction). The viewer can see the light transmitted through the spatial light modulator and view the film image taken by the camera or the like.

[0005]

However, the conventional image display apparatus has a drawback that the image cannot be enlarged because the projection magnification for projecting the image of the film onto the storage means such as the spatial light modulator is fixed. there were.

Further, if a plurality of lens groups for projecting a film image onto a spatial light modulator are arranged between the film and the reflection mirror, there is a disadvantage that the optical path length is extended and the device becomes large. Was.

In order to change the projection magnification for projecting the image of the film onto the spatial light modulator, when a part of the lens groups is moved back and forth from the projection optical path, it is attempted to move the lens group in a direction perpendicular to the longitudinal direction of the film. Then, there is a disadvantage that the apparatus becomes large in order to secure a space for evacuating the lens groups.

If a means for setting a projection magnification for projecting the image of the film onto the spatial light modulator is newly provided, the operation system becomes complicated and the cost increases.
There is a disadvantage that the operation is troublesome for the viewer.

Further, if the projection magnification for projecting the image of the film onto the spatial light modulator is changed, the amount of light per unit area reaching the spatial light modulator also changes, and an image having an appropriate contrast cannot be obtained. There was a disadvantage.

[0010]

According to a first aspect of the present invention, there is provided a projection optical system for projecting an image on a film, and an image is stored by receiving image projection from the projection optical system. In an image storage device having a storage unit, a control unit that controls a projection optical system to change a projection magnification of an image onto the storage unit is provided.

This makes it possible to enlarge or reduce the original image of the film at a desired magnification and store it in the storage means.

More specifically, for example, the projection optical system is configured to include a lens and two reflection mirrors disposed on both sides of the lens in the optical axis direction, and the projection optical system is operated by a user or a magnetic recording unit of the film. The projection magnification is changed by moving the lens forward and backward with respect to the optical path of the projection optical system in a direction perpendicular to the optical axis (preferably, a direction parallel to the longitudinal direction of the film) in accordance with the recorded information.

By employing a configuration in which a lens is arranged between two reflection mirrors, the projection optical system can be efficiently and compactly arranged in the apparatus, and the apparatus can be downsized. In particular, by moving the lens in a direction parallel to the longitudinal direction of the film, it is possible to effectively use the dead space which has conventionally been generated for the film arrangement, and as a result, the size of the apparatus can be reduced.

Further, the means operated by the user for setting or changing the projection magnification also serves as means for switching the operation and non-operation of the apparatus, so that the number of parts can be reduced. In addition, the cost can be reduced and the size of the apparatus can be reduced.

Further, in the second invention of the present application, a projection optical system for projecting an image of a film, storage means for receiving an image projected from the projection optical system and storing the image, and storage means for controlling the projection optical system Control means for changing the projection magnification of an image onto the storage means, wherein the control means performs control for maintaining the amount of image projection to the storage means at a substantially predetermined level regardless of the projection magnification. ing.

Specifically, the amount of light for illuminating the film is controlled in accordance with the projection magnification, and the number of times the image is projected on the storage means is controlled.

Further, in the third invention of the present application, a projection optical system for projecting an image of a film, storage means for receiving an image projected from the projection optical system and storing the image, and storage means for controlling the projection optical system In an image storage device having a control unit for changing a projection magnification of an image to the storage unit, the control unit changes a condition of a storage operation of the storage unit in accordance with the change in the projection magnification. Specifically, the power application time to the storage unit is controlled according to the change in the projection magnification.

According to the second and third aspects of the invention, it is possible to avoid such a disadvantage that a change in the projection magnification in the projection optical system causes a change in the amount of image reaching the storage means and a low-contrast image is stored. .

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIGS. 1 to 11 show an image display device (device provided with an image storage device) according to a first embodiment of the present invention. 1 is an explanatory diagram of a layout of the image display device, FIG. 2 is a front view of the image display device, FIG. 3 is a block diagram of an electric circuit of the image display device, and FIGS.
6 is a flowchart of the operation of the image display device, FIG. 7 is an explanatory diagram of the main switch, FIGS. 8 to 10 are explanatory diagrams of the layout of the image display device, and FIG. 11 is a structural diagram of the SLM.

As shown in FIGS. 1 to 3, the image display device 1
Is a CPU 100 which is control means for controlling the entire apparatus.
A spatial light modulator (hereinafter, referred to as an SLM) 10 including a ferroelectric liquid crystal, a photoelectric conversion film, and the like;
10, an SLM drive circuit 101 for driving and controlling the film feeder 10, a film feed mechanism (not shown) for drawing out the original film 12 from the film cartridge 80 and feeding it to the spool 81, and a film feed circuit for controlling the film feed mechanism 1
03.

Further, a xenon tube 13 for illuminating the film 12, a reflector 14 for efficiently condensing the light emitted from the xenon tube 13 to the light guide member 15, and a strobe for controlling the light emission of the xenon tube 13 A light emitting circuit 104. It has a projection optical system formed by projection lenses 31 and 31 and reflection mirrors 40, 41 and 42 for projecting the strobe light transmitted through the film 12 onto the SLM 10.

Two straight tube fluorescent lamps 50 and 51 for uniformly illuminating the SLM 10 from the same direction in which the film image is projected onto the SLM 10, and the light emitted from each of the fluorescent lamps 50 and 51 is efficiently emitted onto the SLM 10. Reflectors 60 and 61 for condensing light on the lens, and a lens-shaped body (microlens array) for widening the angle of view of light emitted from the SLM 10
And the two fluorescent lamps 50 and 51
And a readout optical system including a fluorescent lamp lighting circuit 102 for controlling the light emission of the light source.

A light projecting element 16 and a light receiving element 17 for optically detecting the perforation of the film 12 fed by the film feeding mechanism, and a perforation detecting circuit for controlling the light projecting element 16 and the light receiving element 17 107.

Further, a liquid crystal display element 1 for displaying the frame number or time of the film image displayed on the SLM 10
8 and an LCD display circuit 106 for driving and controlling the liquid crystal display element 18.

In addition to controlling the activation of the device 1,
Main switch 2 for setting the film projection magnification
1, a display switching button 23 for switching the display content of the liquid crystal display element 18, an image writing button 25 for giving an image projection instruction, an Up button 24 for setting a frame number of a film, and a Down button 26. ,
It also has an opening / closing mechanism for opening and closing a film cartridge chamber cover (not shown), an opening / closing button 22 for operating the same, and a signal input circuit 105 for detecting the state of each switch and button.

The EEPROM 110 stores data such as the frame number of the film image written in the SLM 10 or the magnetic information recorded in the magnetic recording portion of the film.
And a lens drive mechanism (not shown) for driving the projection lenses 30, 31 to predetermined positions based on the setting state of the projection magnification of the film 12, and a lens drive circuit 108 for controlling the same.

The CPU 100 has a clock function and also measures time. Further, the CPU 100 has a function of determining a film frame number. Further, the CPU 100 has a function of detecting that the film cartridge is loaded in the apparatus. The loaded state of the film cartridge 80 can be detected based on an output signal of an unillustrated light emitting / receiving element arranged on the side surface of the film cartridge chamber.

Here, the film 12 is of a type in which a developed roll film is housed in a wound state in a film cartridge 80, and the film 12 is pulled out of the film cartridge 80 by a film feeding mechanism (not shown). And wound around a spool 81.

Next, the operation of the image display device will be described with reference to FIGS. The CPU 100 checks whether or not the film cartridge chamber cover opening / closing button 22 is pressed via the signal input circuit 105 to open the film cartridge chamber cover (# 201).

When the viewer presses the film cartridge chamber lid open / close button 22 to load a new film 12 for viewing with the apparatus 1, the CPU 100 sets a flag "F" indicating that the film cartridge 80 is loaded.
"lag1" is set to "1"(# 224). here,
When the value of the flag “Flag1” is “0”, it indicates that the film cartridge 80 is not loaded.

Next, the CPU 100 sets the main switch 21 arranged on the front of the apparatus 1 by the viewer to “off”.
The process waits until the setting of “f” is changed (# 202).
Here, as shown in FIG. 7, the main switch 21 is provided with an “off” position for turning off the power of the apparatus 1, a power-on state of the apparatus 1 and activation, and a projection magnification of the film of 1 ×
“× 1” to set 1.5 times and 2 times,
The position can be switched between “× 1.5” and “× 2”.

When the main switch 21 is set from the "off" position to the position of the desired projection magnification (# 202).
The CPU 100 detects the state via the signal input circuit 105 and sends a signal to the fluorescent lamp lighting circuit 103 to turn on the fluorescent lamps 50 and 51 (# 203). The fluorescent lamps 50 and 51 are straight tube lamps, have a length substantially the same as the length of the SLM 10 in the longitudinal direction, and extend in a direction perpendicular to the paper surface of FIG.

A part of the illumination light from the fluorescent lamps 50 and 51 is converted into substantially parallel light by the reflectors 60 and 61 in a cross section parallel to the plane of the paper, and illuminates the SLM 10 uniformly. Further, the illumination light emitted from the SLM 10 is
The angle of view is changed by the transparent substrate 11 arranged in the vicinity of the light exit surface of the above. Thereby, the viewing angle with respect to the viewer is increased.

When a film image is stored, the stored image can be already viewed on the SLM 10 by the above operation.

Here, the configuration and operating principle of the SLM 10 will be briefly described with reference to FIG. SLM10
Has a configuration in which a ferroelectric liquid crystal 73 is sealed between a glass substrate (with a transparent electrode 75) 77 with a color filter 76 coated with a photoelectric conversion film 74 and a glass substrate 71 with a transparent electrode 72. ing.

The transparent electrode 7 is driven by the SLM driving circuit 101.
2 and 75, the ferroelectric liquid crystal layer 73 and the photoelectric conversion film 7
When a voltage is applied to 4, the voltage divided by the resistance of the ferroelectric liquid crystal layer 73 and the photoelectric conversion film 74 is applied to each layer. At this time, the SLM drive circuit 101 applies a voltage to the SLM 10 so that the voltage applied to the ferroelectric liquid crystal layer 73 becomes lower than the threshold voltage at which the ferroelectric liquid crystal molecules are inverted.

When light is applied to the SLM 10 in this state,
Electric charges are generated in a region where the photoelectric conversion film 74 is irradiated with light, and the resistance of the photoelectric conversion film 74 decreases. As a result, the voltage applied to the ferroelectric liquid crystal layer 73 corresponding to the region where the photoelectric conversion film 74 is irradiated with light increases, and exceeds the threshold voltage at which the ferroelectric liquid crystal molecules are inverted. The molecule flips.

Further, the SLM driving circuit 101
Even if the voltage application to M10 is cut off, the orientation of the liquid crystal molecules is preserved by the hysteresis characteristic of the ferroelectric liquid crystal 73. Therefore, even when no voltage is applied to the SLM 10, the image written once can be stored for a long time.

When the fluorescent lamps 50 and 51 are turned on, the SLM 1
When backlight 0 is illuminated (# 203), the CPU 10
0 starts the timing from the start of the backlight illumination, and compares the measured time T with a preset time T ₀ (#
204). The measured time T is equal to a preset time T _0.
If it is shorter, the CPU 100 continues to check the display content displayed on the liquid crystal display element 180 selected by the display switching button 23 via the signal input circuit 105.

Each time the viewer presses the display switching button 23, the display mode of the liquid crystal display element 180 “non-display mode” → “frame number display mode” → “time display mode” →
The mode is switched in the order of “time setting mode” → “non-display mode”.
The user can confirm the setting state of the display contents via the terminal 5.

If the display content of the liquid crystal display element 18 is not set to the "time setting mode"(# 205), the CPU 100 further sets the value of the flag "Flag2" indicating whether or not the frame number of the film is being set. Check (# 20
6). When the value of the flag “Flag2” is “0”, it indicates that the viewer is not setting the frame number of the film on which the image is to be written, and when the value is “1”, the viewer sets the frame number of the film. To indicate that they are inside.

If the viewer is not setting the frame number of the film to be written in the SLM 10 (# 206), the CPU 100
Confirms the display mode of the liquid crystal display element 18 again. If the display mode of the liquid crystal display element 18 is the "time display mode"(# 207), the CPU 100 sends a signal to the LCD drive circuit 106 to display the time on the liquid crystal display element 18 (# 226). The liquid crystal display element 18 is a reflection type TN type liquid crystal display element and displays time by a dot matrix display method.

On the other hand, if the display mode of the liquid crystal display element 18 is "frame number display mode"(# 208), C
The PU 100 sends a signal to the LCD drive circuit 106 to display the frame number on the liquid crystal display element 18 (# 209). At this time, the frame number displayed on the liquid crystal display element 18 is SL
This is the frame number of the film image written in M10. The frame number of the film image written in the SLM 10 is stored in the EEPROM 10.

If the display mode of the liquid crystal display element 18 is "non-display mode"(# 208), the CPU
100 sends a signal to the LCD drive circuit 106 to prevent the liquid crystal display element 18 from displaying (# 218).

After controlling the liquid crystal display element 18 in this manner, the CPU 100 checks the state of the main switch 21 again via the signal input circuit 105 (# 210).

If the main switch 21 is not in the "off" state, the CPU 100 checks via the signal input circuit 105 whether the cartridge chamber cover opening / closing button 22 has been pressed (# 211). Each time the cartridge chamber lid opening / closing button 22 is pressed, the cartridge chamber lid is opened and closed by a cartridge chamber lid opening / closing mechanism (not shown).

If the viewer presses the cartridge chamber cover open / close button 22 to change the film to be viewed (#
211) Then, the cartridge chamber lid is opened by a cartridge chamber lid opening / closing mechanism (not shown), and "Flag1" is set to "1" assuming that the viewer has replaced the film cartridge 80 (# 219). At this time, the CPU 100 sends a signal to the fluorescent lamp lighting circuit 102 to turn off the fluorescent lamps 50 and 51 that have illuminated the SLM 10 from behind.

On the other hand, if the viewer has not pressed the cartridge chamber lid open / close button 22 or the cartridge chamber lid has not been opened (# 211), the CPU 100 checks the lighting state of the fluorescent lamps 50 and 51 (# 21). 21
2). If the fluorescent lamps 50 and 51 are not lit, C
The PU 100 sends a signal to the fluorescent lamp lighting circuit 102 to turn on the fluorescent lamps 50 and 51 (# 213).

As described above, the lighting state of the fluorescent lamps 51, 51 is controlled by the opening / closing state of the lid of the film cartridge chamber, so that the viewer can turn the main switch 1 "off".
If the fluorescent lamp 5 is turned off in any other state, it is possible to recognize that the lid of the film cartridge chamber remains open.

The CPU 100 continues to operate the signal input circuit 10
It is confirmed whether or not the image writing button 25 has been pressed via # 5 (# 214). If the viewer accidentally presses the image writing button 25 (# 214), the C
The PU 100 executes a film image writing operation (# 221). The operation of writing a film image will be described with reference to the flowchart of FIG.

First, the CPU 100 checks whether or not the frame number of the film is being set by the viewer (# 2).
40).

If the flag "Flag2" indicating whether or not the frame number of the film is being set is "0" and the frame number of the film has not been set by the viewer (# 240), the CPU 100 Is the film cartridge 8
It is confirmed whether or not 0 is loaded in the film cartridge chamber of the apparatus 1 (# 241).

CPU 100 is a film cartridge 80
A light emitting element such as an infrared light emitting diode emits light in order to read a bar code written on the outside of the camera, and light reflected from the film cartridge 80 is received by a line sensor such as a CCD. The CPU 100 confirms whether or not the film cartridge 80 is loaded in the film cartridge chamber based on the output of the light receiving element such as the licensor, and detects the identification information of the film from the bar code information.

The image display device 1 has a film cartridge 8
If 0 is not loaded (# 241), the CPU 100
Sends a signal to the LCD drive circuit 106 to display "OUT" on the liquid crystal display element 18 to warn the viewer that the film cartridge 80 is not loaded (# 2).
47). Then, after a warning is displayed for a while that the film cartridge 80 is not loaded, the process returns to the main routine (# 259).

On the other hand, the film cartridge 80
Is loaded (# 241), it is confirmed whether or not the frame number of the film is displayed on the liquid crystal display element 18 (# 242). If the frame number of the film is not displayed on the liquid crystal display element 18, the value of the flag "Flag1" indicating the detached state of the film cartridge is checked (# 25).
2).

If the value of the flag “Flag 1” is set to “0” and the film cartridge 80 has not been replaced after the film image has been written in the SLM 10 (# 2)
53), the CPU 100 adds EEP to the currently set frame number.
The frame number of the film written in the SLM 10 stored in the ROM 110 is substituted (# 253). Thereby, the viewer can set the frame number of the film based on the frame number of the film written in the SLM 10.

On the other hand, if the value of the flag “Flag 1” is “1”
And if the film cartridge 80 has been replaced after the film image has been written to the SLM 10 (#
252), the CPU 100 substitutes “0” for the currently set frame number (# 258). This allows the viewer to start the SLM1 from the first frame of the newly loaded film.
It is possible to set the frame of the film image to be written to 0.

Then, the CPU 100 sets the value of the flag "Flag2" indicating whether or not the frame number of the film is being set to the value of "1" for which the frame number is being set (# 254). A signal is transmitted to the LCD drive circuit 106 so as to display the frame number being set on the element 18, and the frame number is displayed during the setting (# 255).

Further, the CPU 100 resets the time T after the viewer has set the frame number of the film to "0", and then starts timing again (# 256). Then, the process returns to the main routine (# 259).

As described above, when the frame number of the film is not displayed on the liquid crystal display element 18 even when the image writing button 25 is pressed, the CPU 100 recognizes that the viewer has pressed the image writing button 25 carelessly. SLM10
The writing of the film image to the camera is not executed.

Further, the CPU 100 operates the image writing button 2 when the viewer intends to rewrite the film image.
Considering that the user may press 5 in some cases,
In the state where the frame number of the film is not displayed, the writing of the film image is not performed, but the frame number of the film is displayed on the liquid crystal display element 18 in preparation for writing the film image. Then, the viewer confirms the frame number displayed on the liquid crystal display element 18 and waits until the image writing button 25 is pressed again.

[0062] As shown in FIG. 4, when returning from a subroutine of the "image writing", CPU 100 compares the measured time T a preset time T ₀ after the operation has been performed for the frame setting of the film ( # 204). When the counted time T is shorter than the preset time T ₀ , the CPU 100 continuously checks the display content displayed on the liquid crystal display element 18 selected by the display switching button 23 via the signal input circuit 105. Yes (# 2
05).

If the display content of the liquid crystal display element 18 is not set to the "time setting mode"(# 205), the CPU 100 further checks the value of the flag "Flag 2" indicating whether or not the frame number of the film is being set. Yes (# 206).

If the viewer is setting the frame number of the film to write the image in the SLM 10 (# 206), the CPU
100 checks the state of the main switch 21 again via the signal input circuit 105 (# 210).

If the main switch 21 is not in the "off" state, the CPU 100 checks via the signal input circuit 105 whether the cartridge chamber cover opening / closing button 22 has been pressed (# 211). If the viewer has not pressed the cartridge chamber lid opening / closing button 22 or the cartridge chamber lid has not been opened (# 211), the CPU 100
Confirms the lighting state of the fluorescent lamps 50 and 51 (# 21
2). If the fluorescent lamps 50 and 51 are not lit, C
The PU 100 sends a signal to the fluorescent lamp lighting circuit 102 to turn on the fluorescent lamps 50 and 51 (# 213).

The CPU 100 continues to operate the signal input circuit 1
It is checked whether any one of the operation switches has been pressed through the switch 05.

When the viewer presses the Up button 24 or the Down button 26 to set the frame number of the film image to be written to the SLM 10 (# 215), the CP
U100 sets the frame number of the film image to be written to SLM 10 (# 222).

Here, Up using the flowchart of FIG.
The setting operation of the frame number of the film based on the operation of the button 24 or the Down button 26 will be described.

The CPU 100 controls the film cartridge 8
It is confirmed whether or not 0 is loaded in the film cartridge chamber of the image display device 1 (# 260). If the film cartridge 80 is not loaded (# 260),
The CPU 100 sends a signal to the LCD drive circuit 106,
"OUT" is displayed on the liquid crystal display element 18 to warn the viewer that no film is loaded (# 27).
1). Then, for a while, the film cartridge 80
After warning that no is loaded, the program returns to the main routine (# 267).

On the other hand, the film cartridge 80
Is loaded (# 260), the CPU 100 sets the flag "Flag" indicating whether or not the frame number of the film is being set.
The value of "2" is confirmed (# 261). The flag "Flag
If the value of "2" is "0" and the frame number of the film is not being set (# 261), the CPU 100 subsequently checks the value of the flag "Flag1" indicating the state of attachment / detachment of the film cartridge (# 262).

If the value of the flag “Flag 1” is set to “0” and the film cartridge 80 has not been replaced after the film image has been written to the SLM 10 (# 2)
62), the CPU 100 sets the EEP to the currently set frame number.
The frame number of the film image written in the SLM 10 stored in the ROM 110 is substituted (# 263). Thus, the viewer can set the frame number of the film based on the frame number of the film image written in the SLM 10.

On the other hand, when the value of the flag “Flag 1” is “1”
And if the film cartridge 80 has been replaced after the film image has been written to the SLM 10 (#
251), the CPU 100 substitutes “0” for the currently set frame number (# 268). Thus, the viewer can set the frame of the film image to be written to the SLM 10 sequentially from the first frame of the newly loaded film cartridge 80.

Further, the CPU 100 sets the value of “Flag 2” to the value of “1” for which the frame number is being set (# 264), and displays the LCD on the liquid crystal display element 18 so that the frame number being set is displayed. A signal is transmitted to the drive circuit 106 to display the frame number during the setting (# 265).

Further, the CPU 100 resets the time T after the viewer has set the frame number of the film to "0", and then starts timing again (# 266). Then, the process returns to the main routine (# 267).

As described above, even when the liquid crystal display element 18 does not display the frame number of the film, the CPU 100 sets the Up button 24 or the Down button in order for the viewer to set the frame number of the film to be written on the SLM 10.
When the button 26 is pressed, the frame number of the film is displayed on the liquid crystal display element 18 immediately. Therefore, the viewer can check the frame number of the film currently being set on the liquid crystal display element 18 without operating the display switching button 23.

On the other hand, the film cartridge 80
Is loaded (# 260), if the value of "Flag2" is "1" and the frame number of the film is being set (# 26)
1) The CPU 100 determines whether the frame number newly set according to the operation of the Up button 24 or the Down button 26 with respect to the frame number of the film displayed on the liquid crystal display element 18 is valid. Yes (# 2
69). That is, it is determined whether the frame number of the film that is to be newly set by the viewer does not become larger than the number of recordable frames of the film or becomes smaller than “1”. If the frame number of the film to be newly set by the viewer is valid (# 26
9), the CPU 100 performs addition or subtraction from the frame number of the film being set according to the operation of the Up button 24 or the Down button 26 (# 270).

If the frame number of the film to be newly set by the viewer exceeds the number of frames that can be photographed or is smaller than "1"(# 269), C is set.
The PU 100 does not change the value of the frame number of the film being set.

The viewer's Up button 24 or Down
When the frame number of the film is set in response to the operation of the button 26, the CPU 100 transmits a signal to the LCD drive circuit 106 so that the frame number being set is displayed on the liquid crystal display element 18, and the frame number is set during the setting. Is displayed (# 265)
.

Further, the CPU 100 resets the time T after the viewer sets the frame number of the film to "0", and then starts counting time again (# 266). Then, the process returns to the main routine (# 267).

[0080] As shown in FIG. 4, when returning from a subroutine of "frame number setting", CPU 100 may compare the measured time T a preset time T ₀ after the operation has been performed for the frame setting of the film (# 204). When the counted time T is shorter than the preset time T ₀ ,
Subsequently, the CPU 100 checks the display content displayed on the liquid crystal display element 18 selected by the display switching button 23 via the signal input circuit 105 (# 205).

If the display content of the liquid crystal display element 18 is not set to the "time setting mode"(# 205), the CPU 100 further checks the value of the flag "Flag 2" indicating whether or not the frame number of the film is being set. Yes (# 206)
.

If the viewer is setting the frame number of the film to write the image on the SLM 10 (# 206), the CPU
100 confirms again the state of the main switch 21 via the signal input circuit 105 (# 210).

If the main switch 21 is not in the "off" state, the CPU 100 checks via the signal input circuit 105 whether the cartridge chamber cover opening / closing button 22 has been pressed (# 211). If the viewer has not pressed the cartridge chamber lid open / close button 22 or if the cartridge chamber lid has not been opened (# 211), the CPU 100 checks the lighting state of the fluorescent lamps 50 and 51 (# 21).
2). If the fluorescent lamps 50 and 51 are not lit, C
The PU 100 sends a signal to the fluorescent lamp lighting circuit 102 to turn on the fluorescent lamps 50 and 51 (# 213).

The CPU 100 continues to operate the signal input circuit 1
It is checked whether any one of the operation switches has been pressed through the switch 05.

After checking the frame number of the film displayed on the liquid crystal display element 18, the viewer can check the SLM10 of the film image.
When the image writing button 25 is pressed in order to write data into the memory (# 214), the CPU 100 executes a film image writing operation (# 221).

Here, the writing operation of the film image will be described with reference to the flowchart of FIG.

First, the CPU 100 checks whether or not the frame number of the film is being set by the viewer (# 2).
40).

If “Flag2” is a value of “1” and the frame number of the film is set by the viewer (# 240), the CPU 100 displays the viewer on the liquid crystal display element 18. After confirming the frame number of the film, the viewer recognizes that the viewer has pressed the image writing button 25 to write the film image on the SLM 10, and sends a signal to the fluorescent lamp lighting circuit 102 to illuminate the SLM 10 with the backlight. The fluorescent lamps 50 and 51 are turned off (# 243).

Further, the CPU 100 transmits a signal to the perforation detection circuit 107 and the film feeding circuit 103, and feeds the film 12 by the film feeding mechanism to the frame number of the currently set film displayed on the liquid crystal display element 18. (# 244). The frame number of the film is optically detected by using the light projecting element 16 and the light receiving element 17 for the perforation of the film 12. The perforation detection circuit 107, which has received a signal from the CPU 100, causes a light emitting element such as an infrared light emitting diode to emit light, illuminates the end of the film 12, and receives light transmitted through the perforation by a light receiving element such as a photodiode. Detect output. CPU 100 is a perforation detection circuit 107
The number of the frame is detected from the output of the photodiode detected via the.

The CPU 100 further includes a main switch 2
It is confirmed whether or not the setting states of the projection lenses 30 and 31 match the projection magnification of the film 12 set in Step 1 (# 245). The projection magnification of the film 12 set by the main switch 21 (for example, “× 1.
If the setting states of the projection lenses 30 and 31 match (5)) (# 245), the CPU 100 performs settings for writing a film image to the SLM 10.

Further, the CPU 100 causes the strobe light emitting circuit 104 to set the amount of strobe light emission according to the projection magnification. Table 1 shows strobe light emission amounts set with respect to the projection magnification of the film 12 set by the main switch 21. The strobe light emission amount P is set to increase as the projection magnification increases (P ₁ <P ₂ <P ₃ ). For example, if the projection magnification is “× 1.
5 ”, the amount of strobe light emission is P2
Is set to

[0092]

[Table 1]

At this time, the SLM drive circuit 101 for controlling the driving of the spatial light modulator sets the drive condition of the SLM to the standard drive condition (# 247).

When the strobe light emission amount (writing amount) and the driving conditions of the spatial light modulator are set (# 247),
The CPU 100 sends a signal to the SLM drive circuit 101 and applies a reset pulse to the SLM 10 in order to erase an image already written in the SLM 10. Further C
The PU 100 transmits a signal to the strobe light emitting circuit 104 to cause the xenon tube 13 to emit a predetermined amount of light, thereby illuminating the film 12 uniformly.

As shown in FIG. 1, the projection optical system for projecting the image on the film 12 onto the SLM 10 is composed of two lens groups (projection lens 30 and projection lens 31) and three reflection mirrors. In FIG. 1, each projection lens is depicted as a single lens for convenience, but is actually configured with a plurality of lenses.

When the projection magnification of the film 12 onto the SLM 10 is set to “× 1.5”, the writing light transmitted through the film 12 is reflected by the projection lens 31, the reflection mirror 40,
The light is projected onto the SLM 10 via the projection lens 30, the reflection mirror 41, and the reflection mirror 42.

Here, by arranging the projection lens 30 as the first lens group between the reflection mirror 40 and the reflection mirror 41, the projection optical path can be used efficiently and the apparatus can be downsized. Becomes The projection lens 31 as the second lens group is disposed between the film 12 and the reflection mirror 40.

The CPU 100 transmits a signal to the SLM drive circuit 101 while the xenon tube 13 is emitting light, and applies a predetermined voltage to the SLM 10. At this time, a predetermined amount of light for obtaining an image with high contrast has reached the SLM 10.

In the SLM 10, the ferroelectric liquid crystal molecules in the region where the light is irradiated on the photoelectric conversion film 74 are inverted, and the transfer of the film image is performed. If the direction of the polarizing plate is set so that the region where the ferroelectric liquid crystal molecules have been inverted by light irradiation is in a non-transmission state, the negative film can be inverted. The film image written on the SLM 10 is stored for a long time by the storage action of the ferroelectric liquid crystal 73 constituting a part of the SLM 10 (# 248).

On the other hand, if the setting state of the projection lenses 30 and 31 does not match the projection magnification of the film 12 onto the SLM 10 set by the main switch 21 (# 245), the CPU 100 causes the lens driving circuit 108 And the projection lens is driven to a predetermined position by a lens driving mechanism (not shown) (# 246).

For example, if the projection magnification is set to “× 1” by the main switch 21, the projection lens 31 as the second lens group is retracted out of the projection optical path as shown in FIGS. 8 and 9. At the same time, the projection lens 30 as the first lens group is moved to a predetermined position on the optical axis. At this time,
As shown in FIG. 9, since the projection lens 31 is configured to retract in the longitudinal direction of the film 12 (the feeding direction of the film 12), the dead space which has not been used originally is utilized to utilize the dead space of the apparatus. Enlargement can be prevented. If the projection magnification is set to “× 2” by the main switch 21, the projection lens 30 as the first lens group is retracted out of the projection optical path as shown in FIG. The projection lens 31 as a group is moved to a predetermined position on the optical axis. At this time, since the projection lens 30 is configured to be retracted in the longitudinal direction of the film 12 (the feeding direction of the film 12), a dead space which has not been used originally is used to prevent the apparatus from being enlarged. it can.

When the projection optical system is arranged so as to have a predetermined projection magnification (# 246), the strobe light emission amount (write amount) and the SLM driving condition are set (# 24).
7). Specifically, as shown in Table 1, the strobe light emitting circuit 104 sets the strobe light emission amount to P ₁ when the projection magnification is “× 1”, and sets the strobe light emission amount to P ₁ when the projection magnification is “× 2”. sets the strobe emission light amount P _3.

At this time, the SL for driving and controlling the SLM 10
The M driving circuit 101 sets the driving condition of the SLM to the standard driving condition (# 247).

When the strobe light emission amount (write amount) and the driving conditions of the spatial light modulator are set (# 247),
The CPU 100 sends a signal to the SLM drive circuit 101 and applies a reset pulse to the SLM 10 in order to erase an image already written in the SLM 10. Further C
The PU 100 transmits a signal to the strobe light emitting circuit 104 to cause the xenon tube 13 to emit a predetermined amount of light, thereby illuminating the film 12 uniformly.

The writing light transmitted through the film 12 illuminates the SLM 10 with a predetermined amount of light via a projection optical system and a reflection mirror. The CPU 100 transmits a signal to the SLM drive circuit 101 while the xenon tube 13 is emitting light, and writes an image by applying a predetermined pulse voltage to the SLM 10 (# 248).

When the writing of the image on the film 12 to the SLM 10 is completed (# 248), the CPU 100
10 is the frame number of the film image written in EE.
It is stored as a frame number in the PROM 110 (# 24
9).

Further, the CPU 100 sets the value of "Flag 1" to "0", and sets the film cartridge 80 including the image written in the SLM 10 as if it is loaded in the apparatus 1 (# 250).

Subsequently, the CPU 100 sends a signal to the fluorescent lamp lighting circuit 102 to turn on the fluorescent lamps 50 and 51 (# 251). Part of the illumination light from the fluorescent lamps 50 and 51 is reflected in the reflection shades 60 and 61 in a cross section parallel to the plane of the drawing.
Is converted into substantially parallel light to illuminate the SLM 10 uniformly. Further, the angle of view of the illumination light emitted from the SLM 10 is SL
The image is spread by the transparent substrate 11 arranged near the light emitting surface of the M10, and the viewer can view the subject image photographed on the film 12 by a camera or the like.

When a series of operations for writing the film image to the SLM 10 is completed, the process returns to the main routine (# 259).

[0110] As shown in FIG. 4, when returning from Saburichin of "image writing", CPU 100 compares the measured time T a preset time T ₀ after the operation has been performed for the frame setting of the film (# 204). The time T when the setting of the film frame by the viewer has been completed is completed.
Exceeds the preset time T ₀ , the CPU
100 sets the value of "Flag2" to "0" so that the viewer does not set the frame of the film (#
225).

Next, the CPU 100 sets the signal input circuit 105
The display contents displayed on the liquid crystal display element 18 selected by the display changeover button 23 via the display switching button 23 are confirmed (# 2).
05).

If the display content of the liquid crystal display element 18 is not set to the "time setting mode"(# 205), the CPU 100 further checks the value of the flag "Flag 2" indicating whether or not the frame number of the film is being set. Yes (# 206).

If the viewer is not writing the image to the SLM 10 and setting the frame number of the film (# 206), the CP
U100 confirms the display mode of the liquid crystal display element 18 again. If the display mode of the liquid crystal display element 18 is “time display mode” (# 207), the CPU 100
A signal is sent to the D drive circuit 106 to display the time on the liquid crystal display element 18 (# 226).

Further, CPU 100 confirms again the state of main switch 21 via signal input circuit 105 (# 210). If the viewer finishes viewing the film image and turns off the main switch 21 (# 206),
The CPU 100 transmits a signal to the fluorescent lamp lighting circuit 102 to turn off the fluorescent lamps 50 and 51 (# 227).
Further, the CPU 100 transmits a signal to the LCD drive circuit 106 to set the time to be displayed on the liquid crystal display element 18 as shown in FIG. 6 (# 228).

At this time, if the film cartridge 80 is loaded in the image display device 1 (# 229) and the film 12 is pulled out from the cartridge 80 (# 23).
0), the CPU 100 sends a signal to the film feeding circuit 103, and the film 12 is rewound from the spool 81 by the film feeding mechanism and stored in the film cartridge 80 (# 231).

Further, the CPU 100 stores in the EEPROM 110 the value of the flag "Flag 1" indicating the detached state of the film cartridge 80 (# 23).
2) The value of the flag "lag2" indicating whether or not the frame number of the film is being set is set to "0"(# 23)
3).

When a series of sequences is completed (# 23)
4) Return to the initial state (# 200) Main switch 2
1 until it is changed from the “off” position (#
202).

In this embodiment, the amount of light emitted from the strobe (that is, the amount of illumination of the film) is changed in accordance with the projection magnification, so that the amount of light applied to the SLM is substantially constant irrespective of the projection magnification. Has been described, for example, the SLM
The irradiation light amount to the light source may be set to a substantially constant level.

Further, in the present embodiment, the case where the cartridge storage type film is used has been described. However, a similar effect can be obtained by using a structure corresponding to a sleeve specification film.

(Second Embodiment) In the first embodiment,
At # 247 shown in FIG. 5, the case where the strobe light amount for illuminating the film is changed and set according to the set magnification of the projection optical system has been described. In the present embodiment, the voltage application time is applied to the SLM 10 according to the set magnification. Is set to change the image writing time. The configuration of the device 1 is the same as that of the first embodiment.

Hereinafter, an image writing operation according to the present embodiment will be described with reference to FIG. The CPU 100 checks whether or not the frame number of the film is being set by the viewer (# 240). If the value of "Flag2" is "1" and the frame number of the film is set by the viewer (# 240), the CPU 100 determines that the viewer has the frame number of the film displayed on the liquid crystal display element 18. To recognize that the viewer has pressed the image write button 25 to write the film image to the SLM 10,
A signal is sent to the fluorescent lamp lighting circuit 102 to turn off the fluorescent lamps 50 and 51 illuminating the SLM 10 with backlight (# 243).

Further, the CPU 100 transmits a signal to the perforation detection circuit 107 and the film feeding circuit 103, and the film 1 is fed by a film feeding mechanism (not shown).
2 is fed up to the frame number of the film being set displayed on the liquid crystal display element 18 (# 244). The frame number of the film is detected in the same manner as in the first embodiment.

The CPU 100 further includes a main switch 2
It is confirmed whether or not the setting states of the projection lenses 30 and 31 match the projection magnification of the film 12 set in Step 1 (# 245). The projection magnification of the film 12 set by the main switch 21 (for example, “× 1.
If the setting states of the projection lenses 30 and 31 match (5)) (# 245), the CPU 100 performs settings for writing a film image to the SLM 10.

The CPU 100 causes the SLM driving circuit 101 for controlling the driving of the SLM 10 to set SLM driving conditions according to the projection magnification. Table 2 shows the SLM drive width (voltage application time) set with respect to the projection magnification of the film 12 set by the main switch 21. SL
The width S (voltage application time) of the M drive is set to increase as the projection magnification increases (S ₁ <S ₂ <
S _3). If the projection magnification is set to "× 1.5", the pulse width is set to S _2.

[0125]

[Table 2]

At this time, the flash light emission circuit 104 sets the flash light emission amount to the standard light emission amount (# 247).

The amount of strobe light (the amount of writing) and S
When the driving condition of the LM 10 is set (# 247), the CP
U100 transmits a signal to the SLM drive circuit 101 and applies a reset to the SLM 10 in order to erase an image already written in the SLM 10. CPU 100
Transmits a signal to the strobe light emitting circuit 104 to cause the xenon tube 13 to emit a predetermined amount of light, thereby illuminating the film 12 uniformly.

Further, the CPU 100 transmits a signal to the SLM driving circuit 101 while the xenon tube 13 emits light, and applies a voltage having a predetermined width to the SLM 10. During this voltage application time, a predetermined amount of light for obtaining an image with high contrast has reached the SLM 10.

In the SLM 10, the ferroelectric liquid crystal molecules in the region where the light is irradiated on the photoelectric conversion film 74 are inverted, and the transfer of the film image is performed. If the direction of the polarizing plate is set so that the region where the ferroelectric liquid crystal molecules have been inverted by light irradiation is in a non-transmission state, the negative film can be inverted. The film image written on the SLM 10 is stored for a long time by the storage action of the ferroelectric liquid crystal 73 constituting a part of the SLM 10 (# 248).

On the other hand, if the setting of the projection lenses 30 and 31 does not match the projection magnification of the film 12 onto the SLM 10 set by the main switch 21 (# 245), the CPU 100 executes the first embodiment. A signal is sent to the lens driving circuit 108 to drive the projection lens to a predetermined position by a lens driving mechanism (not shown) (# 246).

When the projection lens is arranged so as to have a predetermined projection magnification (# 246), the drive width for driving the SLM 10 is set (# 247). Specifically, Table 2 above
SLM drive circuit 101 as shown in may, when the projection magnification is "× 1" sets the write width S _1, also the projection magnification set the write width when the "× 2" to S _3. At this time, the flash light emitting circuit 104 sets the flash light emission amount to the standard light emission amount (# 247).

The amount of strobe light (the amount of writing) and S
When the drive conditions of the LM 10 are set (# 247), the CPU 100 subsequently sends a signal to the SLM drive circuit 101 and applies a reset to the SLM 10 in order to erase the image already written in the SLM 10. Further CP
U100 transmits a signal to the strobe light emitting circuit 104 to cause the xenon tube 13 to emit a predetermined amount of light, thereby illuminating the film 12 uniformly.

The writing light transmitted through the film 12 illuminates the SLM 10 with a predetermined light amount via the projection optical system.
The CPU 100 executes S while the xenon tube 13 emits light.
An image is written by transmitting a signal to the LM drive circuit 101 and applying a predetermined voltage to the SLM 10 (# 248).

When the writing of the image on the film 12 to the SLM 10 is completed (# 248), the CPU 100
EEPRO is the frame number of the film image written in 10
It is stored in M110 as a frame number (# 249).

Further, the CPU 100 sets the value of "Flag 1" to "0", and sets the film cartridge 80 including the image written in the SLM 10 so as to be loaded in the image display device 1 (# 250).

Subsequently, the CPU 100 sends a signal to the fluorescent lamp lighting circuit 102 to turn on the fluorescent lamps 50 and 51 (# 251). Part of the illumination light from the fluorescent lamps 50 and 51 is reflected in the reflection shades 60 and 61 in a cross section parallel to the plane of the drawing.
Is converted into substantially parallel light to illuminate the SLM 10 uniformly. Further, the angle of view of the illumination light emitted from the SLM 10 is SL
The image is spread by the transparent substrate 11 arranged near the light emitting surface of the M10, and the viewer can view the subject image photographed on the film 12 by a camera or the like.

When a series of operations for writing a film image to the SLM 10 is completed, the process returns to the main routine (# 259).

In the present embodiment, the case where the width (voltage application time) applied to the SLM 10 is set in the SLM drive circuit 101 according to the projection magnification has been described.
The number of times of writing (the number of voltage application pulses) may be changed as shown in ( ₁ ) (N ₁ <N ₂ <N ₃ ).

[0139]

[Table 3]

In this embodiment, the case where only the driving condition of the SLM 10 is changed in accordance with the projection magnification has been described.

In each of the above embodiments, an image display device using a liquid crystal type spatial light modulator as a storage means has been described. However, the present invention uses a spatial light modulator other than the liquid crystal type, for example, BSO. The present invention can also be applied to an image display device using a spatial light modulator or other storage means. In this case, the drive current may be changed as the drive condition of the storage unit.

Further, in each of the above embodiments, the case where the projection magnification is changed and set by operating the main switch 21 has been described. However, for example, screen size information or the like recorded in the magnetic recording section of the film is read out and the Alternatively, the projection magnification may be changed and set automatically.

[0143]

As described above, according to the first aspect of the present invention, since the projection optical system for projecting the image of the film is controlled to change the projection magnification of the image on the storage means, The original image of the film can be enlarged or reduced at a desired magnification, stored in the storage means, and displayed.

The projection optical system includes a lens and two reflection mirrors disposed on both sides of the lens in the optical axis direction, and the information recorded on the magnetic recording portion of the film by a user operation. If the projection magnification is changed by moving the lens forward and backward with respect to the optical path of the projection optical system in a direction perpendicular to the optical axis (preferably, a direction parallel to the longitudinal direction of the film) in accordance with It is possible to arrange the optical system efficiently and compactly in the device,
The size of the device can be reduced. In particular, by moving the lens in a direction parallel to the longitudinal direction of the film, it is possible to effectively use the dead space which has conventionally been generated for the film arrangement, and as a result, the size of the apparatus can be reduced.

If the means operated by the user for setting or changing the projection magnification is also used as means for switching the operation of the apparatus, the number of parts can be reduced.
Cost reduction and downsizing of the device can be achieved.

According to the second aspect of the present invention, when the projection optical system is controlled to change the projection magnification of an image onto the storage means, the amount of image projection onto the storage means is substantially reduced to a predetermined level regardless of the projection magnification. Or the condition of the storage operation of the storage means is changed in accordance with the change in the projection magnification. To avoid the inconvenience of storing a contrast image, a high-contrast image can always be stored and displayed.

[Brief description of the drawings]

FIG. 1 is a layout explanatory diagram of an image display device according to a first embodiment of the present invention.

FIG. 2 is a front view of the image display device.

FIG. 3 is a block diagram of an electric circuit of the image display device.

FIG. 4 is an operation flowchart of the image display device.

FIG. 5 is an operation flowchart of the image display device.

FIG. 6 is an operation flowchart of the image display device.

FIG. 7 is an explanatory diagram of a main switch of the image display device.

FIG. 8 is an explanatory diagram of an optical system of the image display device.

FIG. 9 is an explanatory diagram of an optical system of the image display device.

FIG. 10 is an explanatory diagram of an optical system of the image display device.

FIG. 11 is a configuration diagram of a spatial light modulator used in the image display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Image display apparatus 10 ... SLM 11 ... Transparent substrate 12 ... Film 13 ... Xenon tube 14 ... Reflector shade 15 ... Light guide member 16 ... Light emitting element 17 ... Light receiving element 18 ... Liquid crystal display element 21 ... Main switch 22 ... Cartridge chamber lid open / close button 23 ... Display switching button 24 ... Up button 25 ... Image writing button 26 ... Down button 30, 31 Projection lens 40, 41, 42 Reflector mirror 50, 51 Fluorescent lamp 60, 61 Reflector shade

Claims (16)

[Claims] 1. An image storage device comprising: a projection optical system for projecting an image of a film; and storage means for receiving an image from the projection optical system and storing an image, wherein the storage is performed by controlling the projection optical system An image storage device, comprising: a control unit that changes a projection magnification of an image onto a unit. 2. The projection optical system includes a lens and two reflection mirrors disposed on both sides of the lens in the optical axis direction, and the control unit controls the projection optical system by using the lens. The image storage device according to claim 1, wherein the projection magnification is changed by driving the optical path to move forward and backward in a direction perpendicular to the optical axis. 3. The image storage device according to claim 2, wherein the lens is driven in a direction parallel to a longitudinal direction of the film. 4. An apparatus according to claim 1, further comprising operation means for causing said magnification change control means to perform drive control of said photographing optical system for changing said projection magnification in response to a user operation. The image storage device according to any one of the above. 5. The image storage device according to claim 4, wherein said operation means also functions as a means for switching between operation and non-operation of the apparatus. 6. The apparatus according to claim 1, wherein the control unit controls the photographing optical system for changing the projection magnification according to information recorded on the film. The image storage device according to claim 1. 7. A projection optical system for projecting an image on a film, storage means for receiving an image projected from the projection optical system and storing the image, and controlling the projection optical system to project the image on the storage means. An image storage device having control means for changing a magnification, wherein the control means performs control for maintaining an image projection light amount to the storage means at a substantially predetermined level regardless of the projection magnification. Image storage device. 8. The image storage device according to claim 8, wherein said control means controls a film illumination light amount in said projection optical system according to said projection magnification. 9. The image storage device according to claim 8, wherein the control unit increases the film illumination light amount as the projection magnification increases. 10. The image storage device according to claim 7, wherein the control unit controls the number of times of image projection from the projection optical system to the storage unit according to the projection magnification. 11. The image storage device according to claim 10, wherein the control unit increases the number of times of projection as the projection magnification increases. 12. A projection optical system for projecting an image on a film, storage means for receiving an image projected from the projection optical system and storing the image, and controlling the projection optical system to project the image on the storage means. An image storage device comprising: a control unit for changing a magnification, wherein the control unit changes a condition of a storage operation of the storage unit according to a change in the projection magnification. 13. The storage means for performing an image storage operation by applying power, wherein the control means changes a power application time to the storage means in accordance with a change in the projection magnification. The image storage device according to claim 12. 14. The image storage device according to claim 13, wherein the control unit increases the power application time as the projection magnification increases. 15. An image storage device according to claim 1, wherein said storage means is a spatial light modulator. 16. An image, comprising: the image storage device according to claim 1; and a readout illumination unit that illuminates the storage unit storing an image to display a stored image. Display device.