JP2001013582A - Picture display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide pictures of high quality by uniformly illuminating a whole screen by sufficiently illuminating the screen center part of a storing and displaying means such as an SLM(spatial light modulation element). SOLUTION: This device possesses the storing and displaying means 109 such as the SLM storing a picture projected and displaying a stored picture, projecting means (104-108(108a-108C)) projecting a picture to the storing and displaying means 109 from a back surface side and illuminating means (112a-112c) by which the stored picture is observed from a surface side by illuminating the storing and displaying means 109 from the back surface side. In this case, the projecting means possesses at least one reflection surface, and the illuminating means 112c is arranged on a side opposed to the storing and displaying means by holding the projecting means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film viewer, and more particularly to an image display apparatus suitable for a desktop photo stand, an electronic album, and the like, which allow a user to view a negative film as a positive image and view it.

[0002]

2. Description of the Related Art Conventionally, as an image display device as described above, a device which utilizes a CCD camera, converts a negative image into an electric signal, and then displays the image on a CRT or a liquid crystal display is generally used. In addition, there is a device that projects a positive film optically and projects it on a special screen.

However, an apparatus using a CCD camera is not suitable for displaying an image of a silver halide photograph such that the density of pixels of a CCD as an image pickup apparatus or a display is low and a face of a person in the image cannot be determined. Is not suitable.

Further, the transmitted light amount of the developed negative film itself is less than 10% in an average scene, and the required light amount is too large to enlarge and project this image. However, there is a disadvantage that the size becomes large.

[0005] On the other hand, with respect to an apparatus using a positive film, it is necessary to pay attention to the photographing conditions of the positive film itself during photographing, which is unacceptable to general users, requires a lot of trouble in the development process, and furthermore, is unfavorable. In addition, it takes extra time to print a photographed frame, which is unacceptable to general users in terms of cost and labor compared to negative film.

Therefore, the present applicant has proposed an image display device suitable for a photo stand, an electronic album, and the like which has solved the above-mentioned disadvantages (Japanese Patent Application No. 10-171017).

This image display device optically projects a negative image onto a display screen and can invert the negative image by using a spatial light modulator (SLM).
Is used as a screen so that a negative film used by a general user can be viewed.
In particular, by utilizing the memory properties of ferroelectric liquid crystal (hereinafter referred to as FLC) as the liquid crystal of the SLM, a negative image can be instantaneously written to the SLM using strobe light, and the image can be observed with read light. I can do it.

Here, the image display device proposed by the present applicant will be described with reference to FIGS. FIG. 11 is an image diagram of the image display device 101. When a developed IX240 film (hereinafter, referred to as a D-cart 102) is loaded into the image display device 101 as a negative film, the photographing screen is inverted negative / positive. It is displayed as a high definition image.

FIG. 12 is a sectional view of the image display device 101. In the figure, reference numeral 103 denotes a developed negative film pulled out from the D-cart 102, which is a photographed original image for writing. This negative film 103
Are indexed frame by frame by the film winding mechanism one by one at the positions shown in the figure.

Reference numeral 109 denotes an SLM formed on the front cover constituting the apparatus main body and opposed to the image observation opening.

Reference numeral 104 denotes a milky-white diffuser plate for uniformly diffusing light emitted from a strobe device 105 to be described later.
The negative film 103 is illuminated. Reference numeral 105 denotes a strobe device similar to that used in cameras and the like.
It is composed of a tube, a reflector, a light emitting circuit and the like. The strobe device 105 emits light in response to a trigger signal from a microprocessor (not shown). Reference numeral 106 denotes an orange base removal filter serving to remove the orange base color from the negative image, and is constituted by an optical filter that has a blue color that is a complementary color of orange.

A projection lens 107 projects the negative image of the negative film 103 via a reflection mirror 108 at a predetermined magnification onto a photoelectric conversion layer of an SLM 109 described later. The above 104 to 108 constitute the projection optical system.
Reference numeral 113 denotes a writing optical path formed by the projection optical systems 104 to 108.

Here, the configuration of the SLM 109 is shown in FIG.
3 will be described. FIG. 13A shows the SLM 10
9 shows a state at the time of image writing, and (b) shows a state at the time of image observation of the SLM 109.

Reference numeral 109a denotes a color filter of a pure color or a complementary color, which is an image pickup device CCD used in a video camera or the like so that a silver halide image can be observed without deterioration.
The fine-grained thing used for the is used. 109b
Reference numerals 109h and 109h denote polarizing plates sandwiching a liquid crystal layer, which will be described later. In the configuration shown in the drawing, the polarizing plate 109b has a polarizing direction which is opposite to the paper surface, and the polarizing plate 109h has a polarizing direction which is horizontal to the paper surface. , A so-called cross Nicol configuration.

Reference numerals 109c and 109f denote transparent conductive films (hereinafter, referred to as ITO films) which are usually made of indium oxide or the like.
It is configured such that potentials of different polarities are generated at 09c and 109f.

Reference numeral 109d denotes a photo capacitor layer, which is formed by a photodiode layer of an amorphous film or an OPC (organic semiconductor film) or the like. One side of the photo-con layer 109d is in close contact with the ITO film 109c, and the other side is in close contact with a later-described FLC 109e.

Reference numeral 109e denotes an FLC which is a liquid crystal layer, one side of which is in close contact with the photo-con layer 109d as described above.
The other surface is in close contact with the aforementioned ITO film 109f.
109 g is glass, which serves to seal the liquid crystal layer and protect the other layers.

Reference numeral 109j denotes a negative film image for explaining a virtual image of the pixel of the negative film 103 projected by the above-described projection lens 107 for the sake of explanation.

In FIG. 12, 112 (112
g, 112h) is a lighting device, which is composed of a straight tube-type light-emitting portion often used for flat displays and the like, and a reflecting member disposed behind the light-emitting portion.
It has a screen width of about 109.

Next, the operation of the image display device will be described with reference to the flowchart of FIG. When the user uses the image display device 101 to load the D-cart 102 into the image display device 101 in order to view the image in the D-cart 102 (S501), the image display device 101 executes the D-cart 102 operation.
A thrust operation of feeding the negative film 103 is performed, and the first frame of the D-cart 102 is positioned on an aperture section (not shown) of the image display apparatus 101 (S502).
In this state, a standby mode state in which a signal from each switch (not shown) is awaited (S503).

Here, when a signal for moving the screen to a certain frame is input by a signal from a remote controller or the like (S5).
04), the designated frame is moved to the aperture section of the image display device 101 (S505), and the process waits in a command waiting state as to whether or not to display an image of the frame (S50).
6).

In this state, when a display command from the user is received (S507), the SW 111 is first turned on to erase the previously displayed frame image (S508), and then the illumination device 112 (112g, 112).
h) is turned on (S509), and the ITO film 10
An electric field on the side opposite to that at the time of writing is applied to 9c and 109f by the power supply 110 (S510).

Then, the FLC 109e is turned into a neutral state by inverting all the cells to the horizontal state partially shown in FIG. 13 (S511). After performing the reset operation for a sufficient time for all the cells to be in the above-described state, the SW 111 is turned off and the lighting device 112 (112
g, 112h) are turned off (S512, S513).

From here, the flow of a new image writing operation is performed. The current state of the image display apparatus 101 is, for example, placed on a shelf such as an office desk or a home wall, and is placed in a brightness of about several hundred lux. The external light is supplied to one polarizing plate 109h and the liquid crystal layer 1
09e, which is about halved by passing through the photocon layer 10
9d. However, in the current state, SW111
Is open, no electric field is applied between the ITO films 109c and 109f. Therefore, FLC109e does not react.

After the SW 111 is closed and turned on (S514), a forward electric field for writing an image by the power supply 110 is applied to the ITO films 109c and 109f (S5).
15). Then, the flash device 105 emits light (S51).
6) The image on the negative film 103 is projected onto the SLM 109 by the strobe light, and the image is written. By the way, since this writing operation is performed in a state where external light is incident as described above, it must be performed promptly under the condition that the projection light has a specified S / N ratio with respect to the external light. . However, the strobe light emission performed in S516 takes about 500 μsec. Since the light emission is completed in about the same degree, the turning on of the SW 111 performed in S515 is also performed at substantially the same timing, and the electric field is cut by turning off the SW 111 immediately after the light emission ends (S517). Thereafter, the image recorded on the SLM 109 is visually recognized by the user in a transmitted illumination manner by turning on the lighting device 112 (112g, 112h) (S5).
18).

Thereafter, the image display apparatus 101 enters a standby state for receiving the next command (S503), but the user continues to view the image of the SLM 109 set by the above operation.

As described above, in the image display device proposed by the assignee of the present invention, an electric potential is supplied to the photocon layer 109d of the SLM 109 for a short time in synchronization with the image projection by the strobe device 105, whereby the image to the SLM 109 is Can be written, so SL for removing external light
There is no need for a light shielding cover that covers M109.
As a result, the size of the high-definition image display device can be reduced. In addition, as a result of illuminating the memory image after turning off the potential at the time of writing with something like a fluorescent lamp different from the writing light, power consumption can be reduced.

Further, the diffusing means 130 (shown by a broken line in the figure) is moved by a drive mechanism (not shown) to make the entire screen of the SLM 109 transparent when writing an image, and to make a diffuse state covering the screen of the SLM 109 when reading an image. By that, S
When observing the image written in the LM109, the SLM1
09 can be uniformly illuminated.

[0029]

However, in the above-mentioned image display device, the positions of the illumination devices 112g and 112h are largely shifted up and down near the SLM 109 to avoid the reflection mirror 108 and the writing optical path. Therefore, to illuminate the SLM 109 as transmitted illumination, S
The LM109 is too close to the upper and lower ends of the screen, and the center of the screen is not sufficiently illuminated compared to the upper and lower ends of the screen.
9 has a disadvantage that the entire screen cannot be uniformly illuminated.

The luminous flux of the illuminating device 112g provided above the screen of the SLM 109 is directed downward as shown by the arrow G in FIG.
The lighting device 1 is placed on the eyes 114 of the observer who tends to look at the screen of FIG.
12g of luminous flux does not enter effectively. Therefore, SLM1
When observing the image written in 09, the illumination device 11
2 g does not sufficiently fulfill the role of transmitted illumination, and has a disadvantage that an observed image becomes dark.

Therefore, the present invention provides an image display device in which the central portion of the screen of the storage display means such as an SLM is sufficiently illuminated, and the entire screen is uniformly illuminated so that a high-quality image can be viewed. The purpose is to:

It is another object of the present invention to provide an image display device in which the luminous flux of the illuminating device enters the eyes of the observer effectively, and the observed image can be efficiently brightened.

[0033]

In order to achieve the above object, according to a first aspect of the present invention, a storage display means such as an SLM for storing a projected image and displaying the stored image, Projecting means for projecting an image from the back side,
An image display device having illumination means for illuminating the storage display means from the back side and enabling observation of the stored image from the front side, wherein the projection means has at least one reflecting surface, and It is arranged on the opposite side of the storage display device across the projection means.

Specifically, when the projecting means has a reflecting surface obliquely opposed to the storage display means, the illuminating means is connected to the reflecting surface (final reflecting surface in the case of having a plurality of reflecting surfaces). It is arranged near the end farthest from the storage display means among the both ends in the inclination direction.

Further, the projection means includes a first reflection surface (for example, a final reflection surface) inclined and opposed to the storage and display means,
In the case of having a second reflecting surface (for example, a reflecting surface in front of the final reflecting surface) inclined and opposed to the first reflecting surface, the illuminating means is provided with the inclined surfaces of the first and second reflecting surfaces. It arrange | positions near the end part of the side which approaches mutually among both ends in the direction.

According to these inventions, the projection means is formed in a bent optical path type utilizing reflection, and the illumination means is arranged at a position farther from the storage and display means than the projection means. A relatively arbitrary place (especially in the center) on the screen of the display means stored in the lighting means while avoiding
It is possible to aim and illuminate. Therefore, it is easy to uniformly illuminate the entire screen of the storage display means, and a compact image display device capable of high-quality image viewing can be realized.

According to the second aspect of the present invention, storage display means such as an SLM for storing the projected image and displaying the stored image, and illuminating the storage display means from the back side to store the image from the front side In the image display device having an illumination means that allows observation of an image, the plurality of illumination means, on the back side of the storage display means, below the axis perpendicular to the screen through the center of the screen of the storage display means Have been placed.

Then, the entire screen of the storage display means is illuminated by the plurality of illumination means.

According to the present invention, there is a tendency that the screen of the storage and display means is viewed obliquely from above (particularly when the screen surface of the storage and display means faces obliquely upward). Can be efficiently entered, a high effect for brightening the observation image can be obtained, and an image display device capable of high-quality image viewing can be realized. Moreover, by arranging a plurality of illuminating means in the lower part of the apparatus, it is possible to make the upper part of the apparatus smaller than in a conventional apparatus in which the illuminating means is separately arranged in the lower part and the upper part of the apparatus.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIGS. 1 to 5 show a configuration of an image display device according to a first embodiment of the present invention. Note that the same components as those of the conventional image display device described with reference to FIG. 11 and the like are denoted by the same reference numerals.

FIGS. 1 and 2 are a front view and a side sectional view, respectively, of the image display device at the time of writing an image. FIG. 3 is a plan view of a main part of the light shielding means and the diffusion means provided in the image display apparatus. It is. 4 and 5
3A and 3B are a front view and a side sectional view of the image display device at the time of image reading, respectively.

In these figures, 1b is a front cover forming the image observation opening 1a, 1c is a rear cover, 1d is a transparent cover covering the entire front cover, and these covers are fixed to a main body (not shown).

Reference numeral 109 denotes an SLM which is disposed to face the image observation opening 1a, and is the same as that described with reference to FIG.

Reference numeral 103 denotes a developed negative film pulled out from the D-cart 102, which is a photographed original image for writing. The negative film 103 is indexed frame by frame by a film winding mechanism at the position shown in the figure.

Numeral 104 denotes a milky white diffusion plate, which uniformly diffuses light emitted from a flash device 105 to be described later.
The negative film 103 is illuminated.

The strobe device 105 is similar to a strobe device used in a camera or the like, and includes a Xe tube, a reflector, a light emitting circuit, and the like. The light emission of the strobe device 105 is controlled by a light emitting circuit 34 which receives a trigger signal from a control circuit 32 described later. Reference numeral 106 denotes an orange base removal filter serving to remove the orange base color from the negative image, and is constituted by an optical filter that has a blue color that is a complementary color of orange.

Reference numeral 107 denotes a projection lens, which reflects the negative image of the negative film 103 on the reflection mirror 108 (108a, 10a).
8b, 108c) at a predetermined magnification.
9 on the photoelectric conversion layer. The above 104 to 108 constitute a projection optical system (projection means). Reference numeral 113 'denotes a writing optical path (projection optical path) formed by the projection optical systems 104 to 108.

Reference numeral 10 denotes a light-shielding device for preventing external light from entering through the image observation opening 1a when writing an image on the SLM 109, and has a structure similar to a so-called blade type shutter blade structure. Specifically, the light-shielding blades 10a,
10b and a parallel link composed of blade arms 10c and 10d. The blade arms 10c and 10d are rotatably mounted around fixed shafts 11a and 11b provided on a blade base plate 11 (fixed to a main body (not shown)), respectively. Dowels 10e and 10g are provided at the tips of the blade arms 10c and 10d.
Light-shielding blades 10a are rotatably attached to e and 10g by caulking. Also, the blade arms 10c, 10c
Dowels 10h and 10i are provided in the middle of d.
Light blocking blades 10b are rotatably attached to these dowels 10h and 10i by caulking.

Reference numeral 12 denotes a motor fixed to the blade base plate 11, and a worm gear 13 is fixed to a rotating shaft of the motor. The helical two-stage gear 14 and the two-stage gear 15 rotatably supported by the worm gear 13 and the blade base plate 11
2 is transmitted to the sector gear 16 at a reduced speed. The sector gear 16 is integrally connected to the blade arm 10c so as to be rotatable around the fixed shaft 11a. For this reason, the forward and reverse rotation of the motor 12 drives the light-shielding device 10 to be in a light-shielded state and a light-shielded release state.

Reference numeral 17 denotes a slider, which is guided by guide shafts 18a and 18b, both ends of which are supported by the main body, and which can move up and down smoothly. 19 is a connecting cam plate,
The base 19a is fixed to the side surface of the slider 17 with a screw 20, and the cam 19b is engaged with the projecting pin 10f of the dowel 10e. Thereby, the movement of the light shielding device 10 can be transmitted to the slider 17.

A connecting plate 21 is fixed to the back surface of the slider 17 with a screw 22, and is connected to the diffusion sheet 30 by an elongated arm 21a. In the diffusion sheet 30, the illumination light of the illumination device 112 (112a, 112b, 112c) is S
The illumination light is diffused before reaching the LM 109, and the illumination light after the diffusion is applied to the SLM 109 substantially uniformly. The diffusion sheet 30 is made of a synthetic resin sheet material having a diffusion characteristic with respect to transmitted light.
It is reinforced by 24 and configured to be easily driven.

Also, as shown in FIG.
Two reflecting mirrors 108 (the first-stage reflecting mirror 108a and the second-stage reflecting mirror 108
b and the last-stage reflection mirror 108c) are arranged, and a storage space for the diffusion sheet 30 is formed in a planar space between the rear surface of the last reflection mirror 108c and the rear cover 1c among the reflection mirrors 108a, 108b, and 108c. ing. The connection between the arm portion 21a of the connecting plate 21 and the diffusion sheet 30 is performed by crimping the crimping pin 25 through a hole provided in the arm portion 21a and the base 23.

Reference numeral 26 denotes a caulking pin for fixing the bases 23 and 24 to the diffusion sheet 30, and reference numeral 27 denotes a guide roller for changing the moving direction of the diffusion sheet 30 according to the inner shape of the image display device. The guide roller 27 is rotatably supported on the upper part of the main body, and has a maximum diameter that is set to be as large as possible so as to minimize bending of the diffusion sheet 30.

Reference numeral 28 denotes a tension coil spring, one end of which is hung on the base 24 and the other end of which is hung on the main body.
The tension is applied so that the diffusion sheet 30 does not bend.

Reference numeral 29a denotes a light-shielding state detection switch fixed to the main body. When the light-shielding device 10 is in the light-shielding state and the slider 17 moves upward, the projection 17a provided on the slider 17 pushes the switch contact piece. Thus, the switch state is switched from OFF to ON.

Reference numeral 29b denotes a light-blocking state detecting switch fixed to the main body. When the light-blocking device 10 is in the light-blocking releasing state and the slider 17 moves downward, the switch state is set by the projection 17a pressing the switch contact piece. It switches from OFF to ON.

Reference numeral 31 denotes an infrared absorption filter which absorbs infrared light generated by light emission of the strobe device 105 serving as an image writing light source and reduces transmission of heat to the film 103 side.

Also, as shown in FIG.
Lighting devices 112 (first lighting devices 112a to 112
c) is arranged. These lighting devices 112a-11
2c, the first illuminating device 112a is a final-stage reflecting mirror 108 that faces the SLM 109 in an inclined state.
c, near the end (lower end in FIG. 2) farthest from the SLM 109, and the last-stage reflection mirror 108c and the second-stage reflection mirror obliquely opposed to the last-stage reflection mirror 108c. Of the two ends in the tilt direction of each of the mirrors 108b, they are arranged in the vicinity of the ends closer to each other (in the present embodiment, at positions substantially sandwiched between the ends of the mirrors 108b and 108c), and are indicated by arrows in FIG. As shown by A, the light is directly illuminated around the center of the screen of the SLM 109 through the space between the second-stage reflecting surface 108b and the last-stage reflecting mirror 108c.

More specifically, the first lighting device 112a
SL across the space where the projection optical systems 104 to 108 are arranged
It is arranged at a position opposite to M109 (the innermost position of the device). For this reason, the first lighting device 112a causes the SLM 1 to start from the position farthest from the SLM 109.
09 can be illuminated aiming at the central part.

The second illuminating device 112b reflects the illuminating light by the final anti-oblique mirror 108c as shown by the arrow B in FIG. 5, and mainly illuminates the upper part of the screen of the SLM 109.
Further, the third lighting device 112c directly illuminates the lower part of the screen of the SLM 109 as shown by the arrow C in FIG.

The lighting devices 112a, 112
b and 112c, as shown in FIG. 2 and FIG. 5, the axis S passing through the center of the screen of the SLM 109 and perpendicular to the screen.
It is arranged below. In addition, the illumination light from the second illumination device 112b that illuminates the upper part of the screen of the SLM 109 is reflected by the final-stage reflection mirror 108c to generate the axis S
Then, the direction is changed slightly downward, and the SLM 109 is irradiated.

The above three lighting devices 112a, 112
b, 112c, the SLM1 is obliquely from above.
The light fluxes from the lighting devices 112a, 112b, and 112c can enter the eyes 114 of the observer who tends to look at the screen 09 most efficiently.

FIG. 6 shows an electric circuit of the image display device 1. In this figure, reference numeral 32 denotes a control circuit that controls the entire sequence of the image display device 1, reference numeral 33 denotes a motor control circuit that controls forward and reverse rotation of the motor 12, reference numeral 34 denotes a light emitting circuit that controls light emission of the flash device 105, 35 is S
LM109 (the ITO films 109c and 109 shown in FIG. 13)
SW1 for switching ON / OFF of energization to f)
11 is an SLM control circuit for controlling the SLM 11.

Next, the operation of the image display device 1 will be described with reference to the flowchart of FIG. This flowchart is started from the point where the D-cart 102 shown in FIG. At this time, the light-shielding device 10 is in a light-shielding state covering the opening 1a of the image display device 1, that is, when the user
Image cannot be observed.

When the user uses the image display device 1 to load the D-cart 102 into the image display device 1 in order to view the image in the D-cart 102 (S101), the D-cart 10
The loading operation including the extrusion (thrust) drive and the pull-out drive of the developed negative film 103 from Step 2 is performed (S102), and then, a standby mode state is set (S103).

Thereafter, when a designated frame output command is received from the user (S104), a designated frame output operation for positioning the specified frame on the aperture is performed (S105), and a command waiting state as to whether or not the image of the frame is displayed by the SLM 109 is issued. And waits (S106). Up to this point, FIG.
The operation is the same as the operation of the conventional device described above.

In this state, when a display command from the user is received (S107), the control circuit 32
Determines whether the light shielding device 10 is in the light shielding state by detecting the state of the light shielding state detection switch 29a (S
108). Here, the light-shielding device 10 is set in a light-shielding state in order to erase the image previously written to the SLM 109 and write a new image in a state where the light-shielding device 10 completely shields the opening 1a of the image display device 1. Check if it is.

If the light-shielding device 10 is not set to the light-shielding state, the process proceeds to the "light-shielding device setting" subroutine shown in FIG.

In the subroutine "light shielding device set",
First, the motor 12 is rotated forward (S130). As a result, the worm gear 13 rotates, and the helical two-stage gear 14 rotates counterclockwise in FIG. Further, the two-stage gear 15 rotates clockwise, and the motor driving force reduced by the operation of these gears is transmitted to the sector gear 16 to rotate it in the counterclockwise direction.

When the sector gear 16 rotates in the counterclockwise direction, the blade arm 10c rotates in the counterclockwise direction around the fixed shaft 11a, and the light shielding device 10 moves from the light shielding release state shown in FIGS. The state changes to the light shielding state shown in FIGS. At this time, the slider 17 linked to the light shielding device 10 moves upward, and the diffusion sheet 30
9 is moved from a position covering the back surface to a position where the cover is released so that writing to the SLM 109 can be performed.

Further, when the light shielding device 10 completely shields the opening 1a of the image display device 1, at substantially the same timing,
When the protrusion 17a of the slider 17 is the light-shielding state detection switch 2
Press the contact piece of 9a and the state of this switch changes from OFF to O
Switch to N. Thereby, the control circuit 32 determines that the light shielding device 10 has completely shifted to the light shielding state (S13).
1) The rotation of the motor 12 is stopped via the motor control circuit 33 (S132). Here, this subroutine ends.

When it is confirmed in step S108 of the main flow shown in FIG. 7 that the light-shielding device 10 is set in the light-shielding state, first, the switch SW is erased to erase the previously written frame image.
After turning on the power supply 111 (S109), the first to third lighting devices 112a to 112c are turned on (S1).
10), an electric field on the opposite side to that at the time of writing is applied to the ITO films 109c and 109f of the SLM 109 by the power supply 110 (S111).

Then, the FLC 109e is turned into a neutral state by inverting all the cells to the horizontal state partially shown in FIG. 13 (S112). After performing the reset operation for a sufficient time for all the cells to be in the above state, the SW 111 is turned off (S113), and the first to third switches are turned off.
The lighting devices 112a to 112c are turned off (S114).

When the erasure of the image previously written to the SLM 109 is completed, the switch 111 is turned on again (S115), and the power supply 110 applies a forward electric field for writing the image to the ITO films 109c and 109f (S1).
16). Then, the strobe device 105 is caused to emit light, and the image of the negative film 103 is converted into an SL by the strobe light.
The image is projected on M109, and an image is written (S117).
When the image writing is completed, the switch 111 is turned off at a predetermined timing (S118).

Next, the process proceeds to a "light-shielding device open" subroutine shown in FIG. 9 for bringing the light-shielding device 10 into the light-shielding release state so that the user can observe the image newly written in the SLM 109 (S119).

In the "light shielding means open" subroutine,
First, the motor 12 is rotated in the reverse direction (S140). As a result, the worm gear 13 rotates and the helical two-stage gear 14 rotates clockwise in FIG. Further, the two-stage gear 15 rotates counterclockwise, and the motor driving force reduced by the operation of these gears is transmitted to the sector gear 16 to rotate it in the clockwise direction.

When the sector gear 16 rotates clockwise, the blade arm 10c rotates clockwise around the fixed shaft 11a, and the light shielding device 10 shifts from the light shielding state to the light shielding releasing state.

At this time, the slider 17 linked to the light shielding device 10 moves downward, and the diffusion sheet 30
9 is moved from the position where the cover of the SLM 109 is released to the position where the rear surface of the SLM 109 is covered.

At substantially the same timing as when the light shielding device 10 enters the light shielding release state, the projection 17a of the slider 17 presses the contact piece of the light shielding release state detection switch 29b, and the state of this switch switches from OFF to ON. Thus, the control circuit 32 determines that the light shielding device 10 has been completely released from light shielding (S141), and the motor control circuit 3
3 to stop the rotation of the motor 12 (S14).
2). Here, this subroutine ends.

When the light-shielding device 10 has thus been released from the light-shielding state and the diffusion sheet 30 has moved to a position covering the back surface of the SLM 109, the process returns to the main routine shown in FIG. 7, and the lighting means 112 (112a, 112b, 112c) is turned on. Let it. The illumination light from each of the illumination devices 112a, 112b, 112c illuminates the SLM 109 substantially uniformly in a diffused state (S120). Thereby, the user can observe the image written on the SLM 109 in a transmission illumination manner. Thereafter, the image display device 1 enters a standby state for receiving the next command (S103).

As described above, in the present embodiment, the first illumination device 112a is located at a position opposite to the SLM 109 with respect to the arrangement space of the projection optical systems 104 to 108, that is, at the innermost position of the device. Have been. More specifically, the SLM 109 of the last-stage reflection mirror 108a
Near the end farther from the second stage reflecting mirror 108b
And the last-stage reflection mirror 108c are arranged near the ends on the side near each other. Therefore, the first illumination device 112a can aim at the center of the screen from almost directly behind the screen of the SLM 109 which is disposed so that the screen surface faces obliquely upward. Therefore, SLM1
09 can easily be uniformly illuminated on the entire screen, and the quality of the observed image can be improved.

The three lighting devices 112a and 112
Since both b and 112c are disposed below the axis S which passes through the center of the screen of the SLM 109 and is perpendicular to the screen, the lighting devices 112a and 112c are arranged on the eyes 114 of the observer who tend to look at the screen of the SLM 109 from obliquely above. The luminous fluxes of 112b and 112c can be efficiently entered, and a high effect of brightening the observed image can be obtained. And SLM
The illumination light from the second illumination device 112b that illuminates the upper portion of the screen 109 is slightly redirected downward with respect to the axis S by the reflection at the final-stage reflection mirror 108c, and the SLM is turned on.
Since the light is emitted to the light source 109, the light beams of the illumination devices 112 a, 112 b, and 112 c can enter the observer's eyes 114 most efficiently.

Further, the end of the last-stage reflecting mirror 108c near the end close to the SLM 109 only needs to have a space for disposing only the guide roller 27. ) Can be achieved.

(Second Embodiment) FIG. 10 shows an image display device according to a second embodiment of the present invention. Note that the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment.

In this embodiment, a space is formed between the projection lens 107 and the reflection mirror 108 by inclining the optical axis of the projection lens 107, and the space near the SLM 109 of the reflection mirror 108 in the conventional apparatus shown in FIG. Instead of the lighting device 112g disposed near the end, the first lighting device 1
12d is arranged near the end of the reflection mirror 108 farther from the SLM 109. In the present embodiment, the second lighting device 112e is arranged in a different position and direction instead of the lighting device 112h of the conventional device.

The first illuminating device 112d mainly illuminates the upper part of the SLM 109 from the center of the screen, as indicated by the arrow D. On the other hand, as shown by the arrow E1, the second lighting device 112e reflects the light once on the reflecting mirror 108,
The lower part of the screen of the SLM 109 is mainly illuminated. further,
Part of the illumination light from the second illumination device 112e is indicated by an arrow E2.
As shown in FIG.
9 illuminates the lower part of the screen. Thus, the SLM 10
The screen 9 is almost uniformly illuminated.

Each of these illuminating devices 112d and 112e is disposed below the axis S passing through the center of the screen of the SLM 109 and perpendicular to the screen, and the observer's eyes 114 tend to look at the screen of the SLM 109 from obliquely above. Lighting equipment 11
The luminous flux of 2d and 112e can be efficiently entered.

The operation of the image display device of the present embodiment is almost the same as that of the first embodiment.

As described above, in the present embodiment, the first illumination device 112d is arranged at a position opposite to the SLM 109 with respect to the arrangement space of the projection optical systems 104 to 108, that is, at the innermost position of the device. Have been. More specifically, the first lighting device 112 d
It is arranged near the end on the far side from LM109. For this reason, it is possible to illuminate from almost right behind the screen of the SLM 109, which is arranged so that the screen surface is obliquely upward, from the center to the upper part of the screen. Therefore, it becomes easy to uniformly illuminate the entire screen of the SLM 109, and the quality of the observed image can be improved.

Further, since both of the illumination devices 112d and 112e are disposed below the axis S passing through the center of the screen of the SLM 109 and perpendicular to the screen, the SLM 1 is obliquely viewed from above.
09 can be efficiently introduced into the eyes 114 of the observer who tends to look at the screen 09, and a high effect of brightening the observation image can be obtained.

Further, also in this embodiment, by arranging the illuminating devices 112d and 112e at the lower portion of the device and not at the upper portion of the device, it is possible to particularly reduce the size (thinning) of the upper portion of the device. .

In each of the above embodiments, the lighting device 11
Although the case where the light emitting unit 2 has a straight tube type light emitting unit has been described, the present invention is also applicable to a case where light emitting units close to a point light source are arranged and a case where a U-shaped tube type light emitting unit is arranged. can do.

In each of the above embodiments, the case where the image of the photographic film is viewed has been described.
The present invention can also be applied to a case where an original (transparent original) other than a photographic film is viewed.

Further, in each of the above embodiments, the image display device using the liquid crystal type spatial light modulator as the storage and display 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 modulation element or another storage display means.

[0095]

As described above, according to the first aspect of the present invention, the projecting means is formed in a bent optical path form utilizing reflection, and the illuminating means is located farther from the storage / display means than the projecting means. The arrangement allows the illumination means to illuminate a relatively arbitrary location (particularly, the center) of the screen of the storage display means while avoiding an increase in the size of the entire apparatus. Therefore, it is easy to uniformly illuminate the entire screen of the storage display means, and a compact image display device capable of high-quality image viewing can be realized.

Further, according to the second aspect of the present invention, it is possible to allow the luminous flux of the illuminating means to efficiently enter the eyes of an observer who tends to look at the screen of the storage and display means from obliquely above. A high effect for brightening the observation image can be obtained. For this reason, it is possible to realize an image display device capable of viewing high-quality images. Moreover, by arranging a plurality of illuminating means in the lower part of the apparatus, the size of the apparatus (particularly, the upper part) can be reduced as compared with the conventional apparatus in which the illuminating means is separately arranged in the lower part and the upper part of the apparatus. Can be.

[Brief description of the drawings]

FIG. 1 is a front view of an image display device (when writing an image) according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of the image display device (when writing an image).

FIG. 3 is a top view of a joint between a light shielding device and a diffusion sheet of the image display device.

FIG. 4 is a front view of the image display device (when reading an image).

FIG. 5 is a side sectional view of the image display device (when reading an image).

FIG. 6 is an electric circuit block diagram of the image display device.

FIG. 7 is an operation flowchart of the image display device.

FIG. 8 is a “light shielding device setting” subroutine of the image display device.

FIG. 9 is a “light-shielding device open” subroutine of the image display device.

FIG. 10 is a side sectional view of an image display device (when reading an image) according to a second embodiment of the present invention.

FIG. 11 is an image diagram of a conventional image display device.

FIG. 12 is a side sectional view of a conventional image display device.

FIG. 13 is a configuration diagram of an SLM.

FIG. 14 is an operation flowchart of a conventional image display device.

[Explanation of symbols]

1, 101: image display device 10: light shielding device 30, 130: diffusion sheet 105: strobe device 107: projection lens 108 (108a, 108b, 108c): reflection mirror 109: SLM 112 (112a, 112b, 112c, 112d, 1)
12e, 112g, 112h): Lighting device

Continued on the front page F term (reference) 2H088 EA44 HA14 HA21 HA24 HA28 MA06 MA20 5G435 AA02 AA03 AA18 BB12 BB17 CC12 DD02 DD07 EE02 EE05 EE16 EE30 FF06 GG01 GG08 GG11 GG12 GG17 GG22 GG28 GG46 LL15

Claims (14)

[Claims] 1. A storage and display means for storing a projected image and displaying the stored image, a projection means for projecting an image on the storage and display means from the back side, and illuminating the storage and display means from the back side. An illumination unit that enables observation of the stored image from the front side, wherein the projection unit includes at least one reflection surface, and the illumination unit is configured to include the projection unit. An image display device arranged on the opposite side of the storage display means with respect to the arrangement space. 2. A storage and display means for storing a projected image and displaying the stored image, a projection means for projecting an image on the storage and display means from the back side, and illuminating the storage and display means from the back side. An illumination unit that enables observation of the stored image from the front side, wherein the projection unit has a reflection surface that is inclined and opposed to the storage display unit; Is disposed near an end of the reflecting surface, which is farther from the storage display means, of both ends in the inclination direction. 3. The reflecting means, wherein the projecting means has a plurality of reflecting surfaces, and wherein the illuminating means is disposed near an end remote from the storage and displaying means. 3. The image display device according to claim 2, wherein the reflection surface is a last-stage reflection surface. 4. A storage and display means for storing the projected image and displaying the stored image, a projection means for projecting an image on the storage and display means from the back side, and illuminating the storage and display means from the back side. An image display device having illumination means for enabling observation of the stored image from the front side, wherein the projection means comprises: a first reflecting surface inclined and opposed to the storage display means; A second reflecting surface inclined and opposed to the reflecting surface, and the illumination means is provided at an end of the first and second reflecting surfaces which are closer to each other among the two ends in the inclination direction. An image display device, which is arranged in the vicinity. 5. The image display device according to claim 4, wherein the first reflecting surface is a last-stage reflecting surface, and the second reflecting surface is a preceding-stage reflecting surface. 6. The image display device according to claim 1, wherein the illumination unit irradiates the storage display unit with illumination light directly. 7. A storage means for storing a projected image and displaying the stored image, and an illuminating means for illuminating the storage display means from the back side so that the stored image can be observed from the front side. Wherein the plurality of illuminating means are arranged on the back side of the storage display means, below an axis passing through the center of the screen of the storage display means and perpendicular to the screen. Image display device. 8. The image display device according to claim 7, wherein the entire screen of the storage display unit is illuminated by the plurality of illumination units. 9. The storage display device according to claim 7, wherein the storage display means is provided with a surface obliquely upward.
An image display device according to claim 1. 10. A plurality of illuminating means, a first illuminating means for illuminating an upper portion of the screen of the storage display means as a center, and an illuminating a lower part of the screen of the storage display means as a center. The image display device according to any one of claims 7 to 9, further comprising a second lighting unit. 11. A first illuminating means for illuminating a central portion of the screen of the storage and display means as the plurality of illuminating means, and a first illuminating means for illuminating an upper part of the screen of the storage and display means. The image display device according to claim 7, further comprising: a second lighting unit; and a third lighting unit configured to illuminate a lower portion of the screen of the storage display unit. 12. A storage device having at least one reflection surface, and projection means for projecting an image on the storage display means from the back side, wherein at least one of the plurality of illumination means has the reflection surface. The image display device according to any one of claims 7 to 11, wherein the storage display unit is illuminated via a light source. 13. The storage device according to claim 12, wherein the illuminating means for illuminating the storage display means via the reflection surface illuminates an upper portion of a screen of the storage display device.
An image display device according to claim 1. 14. The image display device according to claim 1, wherein said storage display means is a spatial light modulator.