JPH11183928A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact image display device without loss of writing light quantity through a polarizing plate in writing an image. SOLUTION: This device is able to take an image-writing state and an image- reading state, and also, to an image display device provided with a spatial light modulating element having a 1t polarizing means for polarizing incident light, this device has a polarizing part 10b for polarizing incident light on a screen part in the direction orthogonal to a direction polarized by the 1st polarizing means and a transmitting part 10a for transmitting the incident light, and is provided with a 2nd polarizing means 10 allowing each configuration of the polarizing part and the transmitting part to be moved with respect to the 1st polarizing means of the spatial light modulating element and a lighting means 112 for lighting the spatial light modulating element, and positions the polarizing part 10b of the 2nd polarizing means 10 between an observer and the spatial light modulating element only when writing an image in the spatial light modulating element.

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 device suitable for a desktop photo stand, an electronic album, and the like that allows a user to view a negative film as a positive image and view it.

[0002]

2. Description of the Related Art Conventionally, such an apparatus generally converts a negative image into an electric signal using a CCD camera and then displays the electric signal on a cathode ray tube display (CRT) or a liquid crystal display (LCD). . In addition, there is a device that projects a positive film optically and projects it on a special screen.

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

Further, the transmitted light amount of the developed negative film itself is less than 10% in an average scene, and even if such an image is enlarged and projected, the required light amount is too large. In some cases, the device was enlarged.

On the other hand, with respect to an apparatus using a positive film, the positive film itself is unacceptable to general users due to various considerations on the photographing conditions at the time of photographing. Compared to a positive film, it was unacceptable to general users in terms of cost and time, as extra time was required when printing frames.

Accordingly, 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 problems.

[0007] This is because the negative image is optically projected on a display screen, and a spatial light modulator (hereinafter, referred to as an SLM) capable of inverting the negative image is formed on the screen. The film can be viewed. In particular, by using a ferroelectric liquid crystal (hereinafter, referred to as FLC) as a liquid crystal of the SLM, a negative image can be instantaneously converted to an SLM using a flash used in a camera or the like by utilizing a memory property of the FLC. And the image is observed with readout light.

The details will be described below.

FIGS. 14 to 17 show a conventional image display device. FIG. 14 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. 15 is a sectional view of the image display device 101. In the figure, reference numeral 103 denotes a developed negative film on which a photographed image is pulled out from the D-cart 102, and is configured to be indexed frame by frame by a well-known film winding mechanism. I have.
Numeral 104 denotes a milky white diffusing plate which is configured to uniformly diffuse light emitted from a flash device 105 described later and illuminate the negative film 103. Reference numeral 105 denotes a strobe device used in a camera or the like.
It is composed of an e-tube, a reflector, a light emitting circuit, etc., and emits light in response to a trigger signal from a known 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.

Reference numeral 107 denotes a projection lens which projects the negative image of the negative film 103 at a predetermined magnification through a reflection mirror 108 onto a photoelectric conversion layer of an SLM 109 described later. Reference numeral 109 denotes an SLM, the configuration of which will be described in detail with reference to FIG. FIG. 16A shows the state when an image is written, and FIG.
Shows the configuration of the SLM 109 during image observation. 10
9a is a color filter of a pure color or a complementary color. For example, a fine filter used in an image sensor CCD used in a video camera or the like can be observed without deteriorating a silver halide image. Desirable for display devices. Reference numerals 109b and 109h denote polarizing plates sandwiching a liquid crystal layer, which will be described later. In the configuration of FIG. 16, 109b has a polarization direction opposite to the paper surface, and 109h has a horizontal direction relative to the paper surface. ing. 109c
And 109f are transparent conductive films (hereinafter, referred to as ITO films) which are usually made of indium oxide or the like. The AC power supply 110 and a circuit (not shown) for driving the AC power supply 110 have different polarities to the respective ITO films 109c and 109f by SW111. Is generated. Reference numeral 109d denotes a photo-con layer, which is formed of an amorphous film or a photodiode layer made of an OPC (organic semiconductor film) or the like. One surface is in close contact with the ITO film 109c, and the other surface is in close contact with a later-described FLC 109e. Reference numeral 109e denotes an FLC which is a liquid crystal layer.
And the other side is covered with the above-mentioned ITO film 109f.
In close contact. 109 g is glass, which not only seals the liquid crystal layer but also protects other layers. Reference numeral 109j denotes a negative film image depicting a virtual image of a pixel of the negative film 103 projected by the above-described projection lens 107 for explanation.

In FIG. 15, reference numeral 112 denotes a straight tube type lighting device often used for a flat display or the like.

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 sends out the negative film 103 in the D-cart 102. Perform a thrust operation,
The first frame of the D-cart 102 is positioned at an aperture section (not shown) of the image display apparatus 101 and stopped (S50).
2). In this state, a standby mode state of waiting for reception of a signal from each switch (not shown) is established (S503).

Here, if a signal is input from a remote controller or the like that advances the screen to a certain frame (S50).
4) The designated frame is brought to the aperture section of the image display apparatus 101 (S505), and the process stands by in a command waiting state as to whether or not to display this frame (S506).

When a display command is received from the user in this state (S507), the switch 111 is first turned on to erase the image of the previously displayed frame (S508), and then the lighting device 112 is turned on. (S509) An electric field on the opposite side to that at the time of writing is applied from the power supply 110 (S510).

Then, all the cells of the FLC 109e are inverted to the horizontal state partially shown in FIG. 16 to be in a neutral state (S511). After performing the reset operation for a sufficient time for all the cells to be in the above state, the switch 111 is turned off to turn off the lighting device 112 (S512, S513).

From here, the flow of a new image writing operation is performed.

The current state of the image display device 101 is, for example, placed on a shelf such as a desk in an office or a wall at home, and is placed in a brightness of about several hundred lux.
The external light is supplied to one polarizing plate 109 h and the liquid crystal layer 109.
e, the light is incident on the photocon layer 109d after being reduced by about half. However, in the present state, since the SW111 is open, no electric field is applied between the ITO films 109c and 109f. Does not react.

Here, after the SW 111 is closed to turn on the power (S514), a forward electric field for writing an image is applied from the power supply 110 to the ITO films 109c and 109f (S51).
5). Then, the flash device 105 emits light (S51).
6) The image of the negative film 103 is projected by the strobe light, and the image is printed on the SLM 109. However, since this writing operation is performed in a state where the external light is incident as described above, the projection light is regulated by the specified S / S with respect to the external light.
It must be performed promptly under conditions that have an N ratio. However, the strobe light emission performed in S516 takes about 500 μsec. Since all the light emission is completed in about the same degree, the turning on of the SW 111 performed in S515 is also performed at the same timing as that, and the electric field is cut by immediately turning off the SW 111 after the light emission is completed (S517). Thereafter, the image recorded on the SLM 109 is visually recognized by the user in a transmission illumination manner by turning on the illumination device 112 (S518).

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.

With the above configuration, the strobe device 1
Photo-control layer 1 of SLM109 in synchronization with light emission of
09d for a short period of time to supply SLM109
Since an image can be written on the SLM 109, a light-shielding cover that covers the SLM 109 for removing external light is not required. As a result, the size of a 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 could be reduced.

However, in the conventional image display device, the image is written while the SLM 109 is exposed to external light. Therefore, in order to eliminate the influence of external light which is a noise and to make the image clear, a strobe device 105 is required. Therefore, it becomes necessary to project a film image with a large amount of writing light. As a result, the size of the strobe device 105 is increased, which is a bottleneck in reducing the size of the image display device 101. Further, since it becomes necessary to lighten the F _NO of the projection lens 107, or larger lens diameter of the projection optical system, there is a case that to design a compact becomes difficult. Therefore, in order to solve the above problems, the present applicant has proposed an image display device to be introduced below.

The following description focuses on the differences from the image display apparatus 101 described above. FIG. 18 is a longitudinal sectional view of the image display device 201. In FIG. 18, reference numeral 210 denotes a state in which at least the entire surface of the opening 201a of the image display device 201 is covered, and at least a part of the opening 201a of the image display device 201 is opened. A light-shielding member that can take a state where the light-shielding member is in a state of being detected. Specifically, as shown in FIG. 19, when the opening 210 a is set in the opening 201 a of the image display device 201, the light is And a notch 210c which is detected by the position detecting means 214 when the opening 210a of the light shielding member 210 is completely retracted from the opening 201a of the image display device 201.

Reference numerals 211 and 212 denote winding shafts for winding the light shielding member 210.
11a and 212a are integrally formed. Reference numeral 213 denotes a guide shaft which gives a suitable tension to the light shielding member 210 to give a flatness, and also serves as a guide for winding around the winding shafts 211 and 212. 214 is the notch 210b provided on the light shielding member 210,
It is a position detecting means such as a photo interrupter that detects the light 210c, and is configured to sandwich the light shielding member 210. Reference numeral 215 denotes a motor arranged coaxially with the take-up shaft 212. The light-shielding member 210 is driven up and down by the motor 215 and a gear train to be described later.
01 is moved back and forth through the opening 201a. FIG. 20 is an enlarged view of a part of the gear train (A in FIG. 18).
21, the gear train will be described below with reference to FIGS. 20 and 21.

The pinion gear 21 is connected to one end of the motor 215.
5a is provided integrally, and the output of the motor 215 is transmitted to the gear 2 through a gear train not shown for simplification of the drawing.
It reaches to 16. A lever 217 having the same axis as the gear 216 as a rotation center is provided, and a tip 217a is provided with a gear 218 having a known friction function. Thus, when the gear 216 rotates clockwise, as shown in FIG.
8, gear portion 212 of winding shaft 212 through gear 219
a, the motor 215 rotates in the reverse direction and the gear 216 rotates counterclockwise from that state.
When the lever 217 rotates counterclockwise from the state of FIG. 20 due to the friction of No. 8, the gear 218 comes into mesh with the gear 220 (see FIG. 21).

The power transmitted from the gear 220 to the gears 221 and 222 is transmitted through the connecting shaft 223 to the winding shaft 21.
1 to the gear portion 211a.

The above is the schematic configuration of the image display device 201.

FIG. 22 is a block diagram of the image apparatus 201. In FIG. 22, reference numeral 231 denotes control means for controlling the entire sequence of the image display apparatus 201, and 232 denotes a motor for controlling the forward / reverse rotation of the motor 215. Control circuit, 233
Denotes a light emitting circuit for controlling light emission of the strobe device 105;
Reference numeral 4 denotes an SLM control circuit that controls a SW 111 that switches ON / OFF of energization to the SLM 109.

The movement of the light shielding member 210 in the image display device 201 will be described below with reference to the flowchart of FIG. Note that the flowchart starts from the point where the D-cart 102 is loaded in the image display device 201.
At this time, the light shielding member 210 covers the opening 201a of the image display device 201, that is, the user
The image 109 cannot be observed.

When the user uses the image display device 201 to
The D-cart 102 is loaded into the image display device 201 in order to view the image in the cart 102 (S601), and after the loading operation is performed, the D-cart 102 enters the standby mode (S602).
S603) Since the operation from receiving the designated frame issuing command from the user to perform the designated frame issuing operation and then waiting in a command waiting state as to whether or not to display the frame is the same as in the related art, detailed description is omitted. (S604-S
606).

When a display command is received from the user in this state (S607), it is checked whether or not the control means 231 has detected the notch 210c by the position detecting means 214. In other words, the operation described below (erasing the previously displayed frame image and writing a new image) is performed in a state where the opening 210a of the light shielding member 210 is completely retracted from the opening 201a of the image display device 201. It is determined whether or not the light blocking member 210 is set in that state (S608). If the opening 210a of the light blocking member 210 is not retracted from the opening 201a of the image display device 201, the process proceeds to a subroutine of "curtain setting" described later.

After confirming the position of the light shielding member 210,
First, the image of the previously displayed frame is erased, and the operation of writing a new image and turning off the SW 111 is the same as the conventional one (S609 to S618).
Detailed description is omitted. After that, the process proceeds to a subroutine “curtain open” for setting an opening 210 a of the light shielding member 210 in the opening 201 a of the image display device 201, which will be described later, so that the user can observe the image recorded on the SLM 109. (S619) The lighting device 112 is turned on so that the user can view it in a transmissive illumination manner (S620). Thereafter, the image display device 201 enters a standby state for receiving the next command (S603).

The operation of the "curtain set" and "curtain open" subroutines will be described below.

"Curtain set" (refer to the flowchart in FIG. 24) The opening 210a of the light shielding member 210 is
In order to completely retreat from the opening 201a of
The motor 215 is rotated forward (S630). Then, with the rotation of the pinion 215a of the motor 215, the rotation of the motor 215 is transmitted to the gear 216 via a gear train (not shown). At this time, the gear 216 rotates clockwise.
At this time, the power is transmitted from the rotating gear 218 of the gear 216 to the gear 212 a of the winding shaft 212 via the gear 219 by the friction function of the gear 218. As a result, the winding shaft 212 rotates in the counterclockwise direction in FIG. As a result, the light shielding member 210 is wound around the winding shaft 212, and moves in the direction of arrow A in FIG.
The opening 210a is also wound by the winding shaft 212.
When the opening 210a of the light shielding member 210 is completely retracted from the opening 201a of the image display device 201, the cutout 210c of the light shielding member 210 is almost at the same timing.
Is applied to the position detecting means 214. Therefore, the control means 2 detects that the position detecting means 214 has detected the notch 210c.
31 (S631), the control means 231 outputs a signal for stopping the rotation of the motor 215 to the motor control means 232, thereby stopping the rotation of the motor 215 (S632). Here, this subroutine ends.

"Curtain open" (refer to the flow chart of FIG. 25).
First, to set the motor 2 in the opening 201a,
15 is rotated in the reverse direction (S640). Then, the motor 21
As the pinion 215 a rotates, the rotation of the motor 215 is transmitted to the gear 216 via a gear train (not shown). At this time, the gear 216 rotates counterclockwise. At this time, the friction function of the gear 218 causes the gear 21
The rotation of 6 is transmitted from the gear 218 to the gear 220, and finally to the gear portion 211a of the winding shaft 211. As a result, the winding shaft 211 rotates clockwise in FIG. As a result, the light shielding member 210 is
In FIG. 18, the opening 210a wound on the winding shaft 212 also moves, and as a result, the entire area of the opening 201a of the image display device 201 is moved. At about the same timing as when the SLM 109 becomes observable,
10b is applied to the position detecting means 214. Accordingly, the fact that the position detecting means 214 has detected the notch 210b is output to the control means 231 (S641), so that the control means 23
1 outputs a signal for stopping the rotation of the motor to the motor control means 232, whereby the rotation of the motor 215 is stopped (S642). Here, this subroutine ends.

As described above, when a new image is written to the SLM 109, it can be performed in a state where it is shielded from external light.
It becomes possible to reduce the amount of light, also because so write the image without brighten F _NO of the projection lens 107, since the lens diameter of the projection optical system can be smaller than conventional image as a whole The display device 201 can be reduced in size.

Further, since the entire area of the SLM 109 is shielded from light, it is possible to write the image on the SLM 109 at a time, so that the writing time is greatly reduced and the mechanical structure for writing the image is simplified. I was able to do it.

[0038]

However, in the conventional image display devices 101 and 201, an image is written through the polarizing plate 109b of the SLM 109, so that the writing light amount is reduced by the amount transmitted through the polarizing plate 109b. , And the contrast of the written image may be reduced accordingly. Accordingly, or brighten the F _NO of the projection lens 107, and causes interfere because they enhanced the writing light quantity and size of the flash device 105, or decreases the degree of freedom in design, the size of the image display apparatus 101, 201 Had become.

Accordingly, a first object of the present invention is to provide a compact image display device in which the amount of writing light by a polarizing plate is not lost.

Apart from this, the conventional image display device 10
The configurations 201 and 201 are for viewing a negative film and are not compatible with a positive film. That is, since the negative film is inverted by the SLM 109 to display a positive image, if the positive film is projected onto the SLM 109 with the same configuration, the negative image is viewed as a result of the negative / positive inversion by the SLM 109.

Therefore, a second object of the present invention is to enable both a negative film image and a positive film image to be viewed as a positive image with a simple structure, and that there is no loss in the writing light amount due to the polarizing plate.
An object of the present invention is to provide a compact image display device.

[0042]

According to a first aspect of the present invention, there is provided a screen unit capable of taking a state of writing an image and a state of reading an image. An image display device comprising: a spatial light modulator having a first polarizing unit for polarizing incident light; and an illumination unit for illuminating an incident surface of the spatial light modulator.
It is characterized by having a second polarizing means capable of replacing a polarizing part and a transmitting part with respect to the first polarizing means of the spatial light modulating element on the incident side and the emitting side of the spatial light modulating element.

According to a second aspect of the present invention, the first polarizing means is arranged on the emission side of the spatial light modulator.

Further, as described in claim 3, claim 2
Wherein the second polarizing means polarizes the incident light in the same direction as or different from the polarization direction of the first polarizing means.

According to the above-described configuration, it is possible to provide a compact image display device that does not cause a loss of writing light amount due to a polarizing plate when writing an image.

As a configuration for realizing the object of the second invention according to the present application, as described in claim 4, a screen section capable of taking a state of writing an image and a state of reading an image, In an image display apparatus provided with a spatial light modulator having a first polarizing means for illuminating and an illuminating means for illuminating an incident surface of the spatial light modulator, the polarizing means capable of switching the polarization direction of the incident light includes the spatial light. It is characterized by being arranged between a modulation element and the lighting means.

As another configuration for realizing the object of the second invention according to the present application, as described in claim 5, the image display device has a state of covering the entire screen section and at least one of the screen sections. A second polarization unit configured to polarize at least light incident on the screen unit in a first direction; and a polarization unit configured to polarize the light in a direction different from the first direction. A second polarizing section for transmitting the light, and a transmitting section for transmitting the incident light.

[0048] Further, according to the present invention, the second
Is characterized by being formed in the endless belt shape and arranged on the outer periphery.

According to a seventh aspect of the present invention, in the fifth aspect, the second polarizing means is provided in the screen section.

According to the above arrangement, when writing an image, regardless of the type of film of the D-cart loaded in the apparatus, for example, both a negative film image and a positive film image can be viewed as a positive image. It is possible to provide a compact image display device with no loss of writing light amount due to the plate.

[0051]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIGS. 1 to 7 show a first embodiment of the present invention. Note that the same reference numerals are given to the same components as in the related art, and description thereof will be omitted.

FIG. 1 is a longitudinal sectional view of an image display device 1 of the present invention. In FIG. 1, reference numeral 10 denotes a polarizing member disposed before and after the SLM 109 in the optical axis direction. Motor 2
The rotation of 15 is the pinion 215a, a gear train not shown,
Since the light is transmitted to the rotating shaft 11 via the gear 216 and the gear portion 11 a of the rotating shaft 11, the polarizing member 10 is guided by the guide shaft 12 by the rotation of the motor 215, and rotates in the same direction as the rotating shaft 11. Reference numeral 13 denotes position detecting means for detecting the position of the polarizing member 10.

FIG. 2 is a development view of the polarizing member 10. The polarizing member 10 has a transmitting portion 10a provided so that an image in the substantially same area as the opening 1a can be observed, and a polarizing portion 10b for polarizing incident light. In addition, this polarizing part 1
0b, the polarization direction of the conventional SLM10 as shown in FIG.
9 as well as the polarizing plate 109b of the SLM 109.
The crossed Nicols structure is orthogonal to the polarization direction of 9h. In addition, as shown in FIG.
M109 is a polarizing plate 109 with respect to the conventional SLM109.
b is excluded.

In FIG. 2, the end surface of the polarizing member 10 has
A notch 10c is provided for detecting the positions of the transmission unit 10a and the polarization unit 10b. Transmission part 10a and polarizing part 1
The relationship between the notch 10b and the notch 10c and the opening 1a will be described below.

The transmitting portion 10a is formed in the opening 1 of the image display device 1.
a, the position detecting means 13 is at the position 13 'with respect to the transmitting portion 10a.
c is detected by the position detecting means 13 (the position detecting means 13 is in a "bright" state).

The polarizing part 10 b is provided in the opening 1 of the image display device 1.
a, the position detecting means 13 is at the position of 13 "with respect to the polarizing part 10b, so that the notch 10
c denotes a state where the position detection unit 13 does not detect the position (the position detection unit 13 is in a “dark” state).

Note that the transmission part 10a and the polarization part 10b are
Both the short side direction and the long side direction are larger than the opening 1 a of the image display device 1. Thereby, the observer can see the opening 1
Through a, the entire image of the SLM 109 can be observed without being obstructed by the polarizing member 10.

FIG. 4 is a block diagram of the present embodiment.
Reference numeral 31 denotes control means for controlling the entire sequence of the image display device 1.

The movement of the polarizing member 10 in the image display device 1 will be described below with reference to the flowchart of FIG.
Note that the flowchart starts when the D cart 102 is loaded in the image display device 1 of the present embodiment. At this time, the polarizing member 10 attaches the polarizing portion 10b to the opening 1a of the image display device 1. It is set.

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), performs a loading operation, and then enters a standby mode state (S102). , S10
3) Since the operation from receiving the specified frame output command from the user and performing the specified frame output operation and then waiting in a command waiting state as to whether or not to display the frame is the same as in the related art, detailed description is omitted. Yes (S104 to S10
6).

When a display command is received from the user in this state (S107), the control means 31 checks whether or not the position detecting means 13 is "dark". That is, as the operation described below, the erasing of the previously displayed frame image and the writing of a new image are performed by the polarizing member 1.
Whether or not the polarizing member 10 is set in that state in order that the zero transmitting part 10a is completely retracted from the opening 1a of the image display device 1 and the polarizing part 10b is set in the opening 1a. Is confirmed (S108). Here, when the transmission portion 10a of the polarizing member 10 is not retracted from the opening 1a of the image display device 1, the process proceeds to a “curtain set B” subroutine described later.

Here, the state when the observer observes the image display device 1 when the polarizing section 10b is set in the opening 1a will be described.

As described above, the polarizing plate 1 of the SLM 109
09h and the polarizing portion 10b of the polarizing member 10 have a crossed Nicols configuration, so that the polarizing plate 109h and the polarizing portion 1
Most of the light incident from around 0b is not transmitted. For example, if the transmittance of the polarizing plate 109h and the transmittance of the polarizing unit 10b are each 50%, only 50% × 50% = 25% of light is transmitted.

That is, the polarizing portion 10b of the polarizing member 10 is
When set between the opening 1a of the image display device 1 and the SLM 109, much of the external light entering the SLM 109 from the opening 1a can be substantially "shielded". Therefore, if the above state is attained when an image is written to the SLM 109, much external light that adversely affects the image quality can be cut without providing a new light shielding member, so that the image quality of the written image can be prevented from deteriorating. You can.

After confirming the position of the polarizing member 10, the image of the previously displayed frame is first erased, a new image is written, and the switch 111 is turned off. S109-S118),
Detailed description is omitted. Then, a subroutine "curtain open H" for setting the transmission portion 10a of the polarizing member 10 in the opening 1a of the image display device 1 in the same manner as in the related art so that the user can observe the image recorded on the SLM 109 (details). Is described later) (S119),
The illuminating device 112 is turned on so that the user can visually recognize the illuminating device 112 in a transmitted illumination manner (S120). Thereafter, the image display device 1 enters a standby state for receiving a command (S10).
3).

The operation of the "curtain set B" and "curtain open H" subroutines will be described below.

“Curtain Set B” (Refer to the flowchart of FIG. 6) In order to completely retreat the transmitting portion 10a of the polarizing member 10 from the opening 1a of the image display device 1, first, a motor 215
Is rotated forward (S130). Then, with the rotation of the pinion 215a of the motor 215, the rotation of the motor 215 is transmitted to the gear 216 via a gear train (not shown). At this time, the gear 216 rotates clockwise. Gear 216
Is transmitted to the gear portion 11a of the rotating shaft 11. As a result, the rotation shaft 11 rotates counterclockwise in FIG.
As a result, the polarizing member 10 rotates in the counterclockwise direction together with the rotation axis 11 and moves in the direction of arrow A in FIG.
While moving to the position between M109 and the illuminating device 112, the polarizing part 10b arranged at that position moves in the direction of the guide shaft 11 and is set in the opening 1a. Then, the motor 215 is rotated by a predetermined amount, and the transmission part 10a of the polarizing member 10 is completely retracted from the opening part 1a of the image display device 1, and at least at a position between the SLM 109 and the illumination device 112 as shown in FIG. When each side of the transmitting portion 10a is retracted outside the written optical path and the polarizing portion 10b is disposed at a position completely covering the opening 1a, the position detecting means 13 changes from "bright" to "dark". Because (S
131), the rotation of the motor 215 is stopped by outputting a signal for stopping the rotation of the motor 215 from the control means 31 to the motor control means 232 (S13).
2). Here, this subroutine ends.

"Curtain Open H" (Refer to the flowchart of FIG. 7) In order to set the transmission portion 10a of the polarizing member 10 to the opening 1a of the image display device 1, first, the motor 215 is reversely rotated (S140). Then, the pinion 2 of the motor 215
With the rotation of the motor 15a, the motor 2
The rotation of 15 is transmitted to the gear 216. At this time, the gear 21
6 rotates counterclockwise. The rotation of the gear 216 is transmitted to the gear portion 11a of the rotating shaft 11. As a result, the rotating shaft 11 rotates clockwise in FIG. Thereby, the polarizing member 10 also rotates clockwise with the rotation axis 11. Accordingly, the polarizing member 10 moves in the direction of arrow B in FIG. 1, so that the transmitting portion 10a moves to the opening 1a and the polarizing portion 10b moves to a position between the SLM 109 and the lighting device 112. The transmitting portion 10a completely covers the opening 1a, and the polarizing portion 10b is disposed at a position covering the SLM 109.
At substantially the same timing as when the LM 109 becomes observable, the notch 10 c of the polarizing member 10 is
It takes three. Therefore, the position detecting means 13
0c is detected and output to the control means 31 (S1
41), the rotation of the motor 215 is stopped by outputting a signal for stopping the rotation of the motor from the control means 31 to the motor control means 232 (S142). Here, this subroutine ends.

As described above, when an image is written on the SLM 109, the polarization part 10b of the polarization member 10 and the SLM
Since the external light can be substantially blocked by the polarizing plate 109h of the projector 109, not only the light amount of the strobe device 105 can be reduced than in the conventional case, but also the projection lens 107 can be reduced.
Of from F _NO bright image can be written to without a lens diameter of the projection optical system can be smaller than conventional. As described above, the size of the image display device 1 can be reduced as a whole.

Further, since the entire area of the SLM 109 is substantially shielded from external light, it is possible to write an image on the SLM 109 in a lump without loss of writing light amount by the polarizing plate while preventing deterioration of image quality. As a result, the writing time was greatly reduced, and the mechanism for writing the image was simplified.

The opening shape and the arrangement of the polarizing portions and the arrangement thereof, and the detection method thereof described in the present embodiment are not limited to those described above. Needless to say, even if changed, the same effect as in the present embodiment can be obtained. (Second Embodiment) FIGS. 8 to 13 show a second embodiment of the present invention. Note that the same reference numerals are given to the same components as those of the conventional and the first embodiment, and description thereof will be omitted. FIG. 8 is a longitudinal sectional view of the image display device 1 of the present embodiment. In the same figure, reference numeral 20 denotes a polarizing member having a polarizing portion having a different polarization direction as described later, which will be described in the first embodiment. Similarly to the changed member, the rotating member 11 rotates in the same direction as the rotating shaft 11 while being guided by the guide shaft 12 and the guide shaft 213. 14 is the same as the position detecting means 13.
Position detecting means 303 for detecting the position of the polarizing member 20 is a developed film housed in the D-cart 102.

FIG. 9 is a development view of the polarizing member 20. The SLM 1 on which the negative film image is written is formed on the polarizing member 20.
09, a polarizing portion 20a for inverting the image positively and negatively, transmitting portions 20b and 20b 'provided so that the image written in the SLM 109 from the opening 1a can be observed, and a polarizing portion 20.
a polarization part 20 having a different absorption axis for incident light
c. Note that the polarization direction of the polarization unit 20a is
The SLM 109 is similar to the polarization unit 10b of the first embodiment.
The crossed Nicols configuration is orthogonal to the polarization direction of the polarizing plate 109h.

The relationship between the absorption axis of the polarization section 20a for the incident light and the absorption axis of the polarization section 20c for the incident light is as follows.
Since it differs depending on the rotation angle of the liquid crystal material used for the FLC 109e of the SLM 109, the absorption axis of the polarizing section 20c may be made different depending on the liquid crystal material.

The polarizing member 20 is provided with an end face of the polarizing section 2.
Notches 20d, 20e, 20f, and 20g are provided for detecting the positions of Oa, transmitting portion 20b, and polarizing portion 20c. The position where the polarizing part 20a, the transmitting parts 20b and 20b 'and the polarizing part 20c are set, and the notch part 20
The relationship between d to 20g and the opening 1a will be described below.

The polarization section 20a is composed of the SLM 109 and the illumination device 1.
12, the transmission portion 20b 'is set in the opening 1a of the image display device 1 at this time, but the position detection means 13 and 14 are respectively set to the polarization portion 20a by 13' and 14 '. Since it is at the position 14 ', the notch 20d is detected by the position detector 14 (the position detector 14 is in the "bright" state), but the position detector 13 does not engage the notches 20e and 20f. , “Dark” state.

The transmitting section 20b is composed of the SLM 109 and the lighting device 1.
In this case, the polarization unit 20b is set in the opening 1a of the image display device 1 at this time, but the position detection means 13 and 14 correspond to 13 ″ and 14 with respect to the transmission unit 20b. , The notch 20e is detected by the position detecting means 13 (the position detecting means 13 is in a "bright" state), but the position detecting means 14 does not cover the notches 20d and 20g. The state is “dark”.

The polarization section 20c is composed of the SLM 109 and the illumination device 1.
12, the transmission part 20b is set in the opening 1a of the image display device 1 at this time, but the position detection means 13 and 14 are respectively 13 ″ ′ and 14 ″ for the polarization part 20c. Since the position is 14 ″ ′, the notch 20f is moved by the position detecting means 13 to the notch 2f.
Since 0g is detected by the position detecting means 14, the position detecting means 13 and 14 are in the "bright" state.

The following is a summary of the above.

[0079]

[Table 1]

The polarizing section 20a and the transmitting section 20b '
Both the short side direction and the long side direction are larger than the opening 1 a of the image display device 1. Thereby, the observer can see the polarizing part 2
0a is set between the SLM 109 and the illuminating device 112, the SL
The entire negative image written in M109 can be observed with negative / positive inversion.

The polarizing portion 20c and the transmitting portion 20b are also larger in the short side direction and the long side direction than the opening 1a of the image display device 1. Thereby, the observer can see the polarization unit 20.
When c is set between the SLM 109 and the illuminating device 112, the SLM 1 is transmitted from the opening 1a through the transmission unit 20b.
The entire positive image written in 09 can be observed as a positive image.

In FIG. 8, reference numeral 206 denotes an optical filter similar to 106, but is configured to be able to advance and retreat from an image writing optical path by a known mechanism.

FIG. 10 is a block diagram of the present embodiment. In FIG. 10, reference numeral 33 denotes a negative film which is stored in the D-cart 102 loaded in a cartridge chamber (not shown) of the image display device 1. It is a film detecting means for detecting whether the film is a positive film or a positive film. As described in, for example, Japanese Patent Application Laid-Open No. H08-106145, the type of film and the I
Since there is film information such as SO, the bar code can be detected by reading the bar code with a known photo reflector or the like.
Therefore, the film detecting means 33 of the present embodiment refers to a means for detecting the barcode of the D cart 102.

The movement of the polarizing member 20 in the image display device 1 will be described below with reference to the flowchart of FIG. Note that the flowchart is started from a state in which the transmission portion 20b or 20b 'of the polarizing member 20 is set in the opening 1a of the image display device 1.

In order for the user to use the image display device 1 to view the image in the D-cart 102, the user loads the D-cart 102 into the image display device 1 (S201), performs a loading operation, and then enters the standby mode state ( S202, S20
3) Since the operation from receiving the specified frame output command from the user and performing the specified frame output operation and then waiting in a command waiting state as to whether or not to display the frame is the same as in the related art, detailed description is omitted. Yes (S204 to S20)
6).

When a display command is received from the user in this state (S207), it is confirmed whether or not the control means 31 has detected the notch 20e by the position detecting means 13. That is, as the operation described below, the erasing of the previously displayed frame image and the writing of a new image are performed in a state where the polarizing section 20a of the polarizing member 20 completely covers the opening 1a of the image display device 1. It is determined whether or not 20 is set in that state (S208).

Here, the necessity of erasing and writing an image while the polarizing section 20a is set in the opening 1a will be described.

As described in the first embodiment, the polarizing portion 20a of the polarizing member 20 and the polarizing plate 10 of the SLM 109 are used.
Since 9h has a crossed Nicols configuration, the polarizing plate 1
Since much of the light that has entered from before and after the light source 09h and the polarizing section 20a is not transmitted, much of the external light that adversely affects the image quality can be cut, thereby preventing the image quality of the written image from deteriorating.

When the polarizing portion 20a of the polarizing member 20 is not set in the opening 1a of the image display device 1, the polarizing portion 20a of the polarizing member 20a is set in the opening 1a of the image displaying device 1. Proceed to subroutine "Makuset B".

After confirming the position of the polarizing member 20, first, the image of the previously displayed frame is erased, a new image is written, and the SW 111 is turned off (S209 to S219). Before writing the data, an operation corresponding to the type of the film 303 (S215 to S2)
Except for 21), it is the same as the conventional one, and the detailed description thereof will be omitted.

In step S215, when the film 303 is a negative film, the SW 111 is immediately turned on as in the conventional case.
When the film 303 is a positive film, the optical filter 206
Is retracted from the image writing optical path (S222), and then S
W111 is turned on to enter a new image writing flow. Thereafter, the polarizing unit 20a or 20c of the polarizing member 20, which will be described later, is placed in the SLM1 in the image display device 1 so that the user can observe the image recorded on the SLM109.
After proceeding to a subroutine "curtain open H" for setting between the lighting device 09 and the lighting device 112 (S220), the lighting device 112 is turned on so as to be visible to the user in a transillumination manner (S221). ). Thereafter, the image display device 1 enters a standby state for receiving the next command (S20).
3).

The operation of the "curtain set B" and "curtain open H" subroutines of this embodiment will be described below.

[Curtain Set B] (Refer to the flow chart of FIG. 12) In order to make the polarizing portion 20a of the polarizing member 20 completely cover the opening 1a of the image display device 1, first, which transmitting portion is used. It is confirmed whether or not it is set in the opening 1a. That is, it is confirmed whether or not the position detecting means 14 detects the notch 20d of the polarizing member 20 (S2).
30). If the notch 20d is detected, the transmitting portion 20b 'is set in the opening 1a. In this case, the motor 215 is first rotated forward (S10).
231). Then, with the rotation of the pinion 215a of the motor 215, the rotation of the motor 215 is transmitted to the gear 216 via a gear train (not shown). At this time, the gear 216 rotates clockwise and is transmitted to the gear portion 11a of the rotating shaft 11.

As a result, the rotating shaft 11 rotates counterclockwise in FIG. As a result, the polarizing member 20 rotates in the counterclockwise direction similarly to the rotation axis 11, and moves in the direction of arrow A in FIG.
Set to go. Then, the polarizing part 2 of the polarizing member 20
0a completely covers the opening 1a of the image display device 1, and the cutout portion 20e of the polarizing member 20 is moved to the position detecting means at substantially the same timing as the transmission portion 20b is set between the SLM 109 and the illumination device 112. Hang on 13. Therefore,
Since the fact that the position detecting means 13 has detected the notch 20e is output to the control means 31 (S232), the control means 31
By outputting a signal for stopping the rotation of the motor 215 to the motor control means 232, the rotation of the motor 215 is stopped (S233).

On the other hand, in S230, the notch 20d
Is not detected, at this time, the transmission portion 20b is connected to the opening 1a.
First, the motor 215
Is rotated in the reverse direction (S234). Then, with the rotation of the pinion 215a of the motor 215, the rotation of the motor 215 is transmitted to the gear 216 via a gear train (not shown). At this time, the gear 216 rotates counterclockwise. As a result, the rotating shaft 11 rotates clockwise in FIG. As a result, the polarizing member 20 also rotates clockwise, and moves in the direction of arrow B in FIG. 8, so that the polarizing portion 20a retracted from the opening 1a also moves in the direction of the opening 1a. The polarizing portion 20a of the polarizing member 20 completely covers the opening 1a of the image display device 1, and the transmitting portion 20b is
At substantially the same timing as that set between the M109 and the lighting device 112, the position detecting means 13
Is detected to the control means 31 (S232), the control means 31 outputs a signal to stop the rotation of the motor to the motor control means 232, thereby stopping the rotation of the motor 215. (S
233). Here, this subroutine ends.

[Curtain Open H] (Refer to the flowchart in FIG. 13) First, it is checked whether the film 303 in the D-cart 102 is a negative film or a positive film (S240). In the case of a negative film, the polarizing portion 20a of the polarizing member 20 is used.
Must be set between the SLM 109 and the illuminating device 112 in the image display device 1 and the transmission portion 20b 'must be set in the opening 1a. First, the motor 215 is rotated in the reverse direction (S241). Then, with the rotation of the pinion 215a of the motor 215, the rotation of the motor 215 is transmitted to the gear 216 via a gear train (not shown). At this time, gear 2
16 rotates counterclockwise. As a result, the rotating shaft 1
1 rotates clockwise in FIG. As a result, the polarizing member 20 also rotates clockwise, and moves in the direction of arrow B in FIG. 8, so that the polarizing unit 20a set in the opening 1a also moves between the SLM 109 and the lighting device 112. In addition, since the transmissive portion 20b 'is set in the opening 1a, as a result, the negative image written in the SLM 109 in the entire area of the opening 1a of the image display device 1 is negative-positive inverted and is almost the same as observable. At the timing, the notch 20d of the polarizing member 20 is
Hang on 4. Therefore, the position detecting means 14
0d is output to the control means 31 (S2
42), the rotation of the motor 215 is stopped by outputting a signal for stopping the rotation of the motor from the control means 31 to the motor control means 232 (S243).

On the other hand, when the film 303 is a positive film in S240, the polarizing portion 20c of the polarizing member 20
Must be set between the SLM 109 and the illuminating device 112 in the image display device 1, and the transmission portion 20b must be set in the opening 1a. First, the motor 215 is rotated forward (S244). Then, the pinion 2 of the motor 215
With the rotation of the motor 15a, the motor 2
The rotation of 15 is transmitted to the gear 216. At this time, the gear 21
6 rotates clockwise. As a result, the rotating shaft 11 rotates counterclockwise in FIG. As a result, the polarizing member 20 also rotates clockwise.
Move in the direction of. Then, the motor 215 is rotated by a predetermined amount, and the transmission portion 20b of the polarizing member 20 is set to a position that completely covers the opening 1a of the image display device 1, and SL
The polarizing section 20c is set between the M109 and the illumination device 112, and the position detecting means 13 is cut off at the same timing as when the positive image itself written on the SLM 109 becomes observable over the entire opening 1a. Because the position detecting means 14 detects the notch 20g (S24).
5) The rotation of the motor 215 is stopped by outputting a signal for stopping the rotation of the motor from the control means 31 to the motor control means 232 (S243). Here, this subroutine ends.

As described above, regardless of the type of film stored in the D-cart 102, the opening 1
The image written to the SLM 109 via the “a” can be observed as a positive image.

The polarizing member 20 is provided with the transmitting portions 20b, 2
Ob 'and the polarizers 20a and 20c are provided, so that a positive image can be observed without adding new components, and the cost of the image display device 1 can be reduced.

Further, similarly to the first embodiment, SL
Since the entire region of M109 is substantially shielded from external light, not only can the image display device 1 be miniaturized, but also the image quality of the written image can be prevented from deteriorating, the writing time can be shortened, and the writing mechanism can be simplified. Was achieved.

The structure of the polarizing members 10 and 20 and the structure of the driving mechanism thereof are not limited to those described in the present embodiment.
It is needless to say that the same effect as that described in the present embodiment can be obtained even with a mechanical configuration in which the rotary shaft 11 and the guide shaft 12 are respectively driven by disposing 5.

Also, a film image of a D-cart is taken as an example of an image to be written to the spatial light modulator, but when other film images are to be handled, the mechanism for setting the film to the aperture only needs to correspond to it. Therefore, it should be added that the effect of the present invention can be obtained regardless of the type of image to be written, which does not affect the configuration of the polarizing member, which is the gist of the present invention.

[0103]

According to the first to third aspects of the present invention, it is possible to provide a compact image display device in which the amount of writing light is not lost by the polarizing plate when writing an image.

According to the fourth to sixth aspects of the present invention, when writing an image, regardless of the type of film of the D-cart loaded in the apparatus, for example, both a negative film image and a positive film image are positive images. Thus, it is possible to provide a compact image display device which can be viewed without any loss of writing light amount due to the polarizing plate.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an image display device according to a first embodiment of the present invention when an image is written.

FIG. 2 is a developed view of a polarizing member according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of an SLM according to the first embodiment of the present invention.

FIG. 4 is a block diagram according to the first embodiment of the present invention;

FIG. 5 is a flowchart according to the first embodiment of the present invention.

FIG. 6 is a flowchart showing a “curtain set B” subroutine according to the first embodiment of the present invention;

FIG. 7 is a subroutine of “curtain open H” in the flowchart according to the first embodiment of the present invention.

FIG. 8 is a vertical sectional view of an image display device according to a second embodiment of the present invention.

FIG. 9 is a developed view of a polarizing member according to the second embodiment of the present invention.

FIG. 10 is a block diagram according to a second embodiment of the present invention;

FIG. 11 is a flowchart in a second embodiment of the invention according to the present application.

FIG. 12 is a flowchart showing a “curtain set B” subroutine according to the second embodiment of the present invention;

FIG. 13 is a subroutine of “curtain open H” in the flowchart according to the second embodiment of the present invention.

FIG. 14 is a conceptual diagram of a conventional image display device.

FIG. 15 is a cross-sectional view of a conventional image display device.

FIG. 16 is a configuration diagram of an SLM.

FIG. 17 is a flowchart of a conventional image display device.

FIG. 18 is a cross-sectional view of another conventional image display device.

FIG. 19 is a developed view of a light shielding member of another conventional image display device.

FIG. 20 is an enlarged view of a gear train of another conventional image display device.

FIG. 21 is an enlarged view of a gear train of another conventional image display device.

FIG. 22 is a block diagram of another conventional image display device.

FIG. 23 is a flowchart of another conventional image display device.

FIG. 24 is a subroutine of “curtain setting” in a flowchart of another conventional image display device.

FIG. 25 is a subroutine of “curtain open” in a flowchart of another conventional image display device.

[Explanation of symbols]

1, 101, 201 ... image display device 10, 20 ... polarizing member 10a, 20b, 20b '... transmission part 10b, 20
a, 20c: Polarizing unit 13: Position detecting means 215: Motor 31: Control means 232: Motor control means 102: D cart 103: Negative film 112: Illumination device 108: Reflecting mirror 109: SLM

Claims (7)

[Claims] A first portion for polarizing incident light having a screen portion capable of taking a state of writing an image and a state of reading an image;
A spatial light modulator having a polarizing means, and an image display device having an illuminating means for illuminating an incident surface of the spatial light modulator, wherein a polarizing unit is provided with respect to a first polarizing means of the spatial light modulator. An image display device comprising: a second polarizing means capable of replacing each of the transmission sections on the incident side and the emission side of the spatial light modulator. 2. The image display device according to claim 1, wherein said first polarizing means is disposed on an emission side of a spatial light modulator. 3. The image display device according to claim 2, wherein the second polarization means polarizes the incident light in the same direction as or different from the polarization direction of the first polarization means. 4. A spatial light modulating element having a screen portion capable of taking an image writing state and an image reading state, a first polarizing means for polarizing incident light, and illuminating an incident surface of the spatial light modulating element. An image display device provided with an illuminating means, wherein a polarizing means capable of switching a polarization direction of incident light is disposed between the spatial light modulator and the illuminating means. 5. A light-shielding unit which can take a state of covering the entire screen unit and a state of opening at least a part of the screen unit, wherein the second polarizing unit converts at least light incident on the screen unit into a light beam. A polarizing part for polarizing in one direction;
The image display device according to any one of claims 1 to 4, further comprising a second polarizer that polarizes light in a direction different from the first direction, and a transmissive unit that transmits incident light. 6. The image display device according to claim 1, wherein the second polarizing means is formed in the shape of the endless belt and arranged on an outer periphery. 7. The image display device according to claim 6, wherein said second polarizing means is disposed in a screen section.