JP2004318175A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve roughness of an image on a display screen. <P>SOLUTION: In a display device using a spatial light modulation element which allows an image to be written therein and to be converted and read out therefrom, the spatial light modulation element has a color separation means for separating white light into respective colors, on the write side, and the image is colorized through the color separation means when written and read. The display device provided with the spatial light modulation element allowing the image to be written therein and read therefrom, a write means for successively writing the image per pixel, and an optical system for imaging light from the write means has a plurality of reflection means which keep an optical path length for write approximately fixed when writing the image in the spatial light modulation element. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a display device suitable for a desktop film stand, an electronic album, or the like, which allows a user to view a film viewer, particularly a negative film as a positive image, for viewing by a user. Further, the present invention relates to a display device for displaying a digital image with high quality, and particularly to a display device suitable for displaying a still image.

[Outline of the Invention]
When the APS display cartridge is loaded in the film viewer using the spatial light modulator SLM using the ferroelectric liquid crystal element FLC, the shooting frames are reversed one after another, and the same size and the same vividness as the service size print are obtained. This is a display device that is used for displaying on a table or viewing photos taken by everyone.

  Also, a smart display device that optically enlarges and projects an image (area) as a photo stand, in which an electric signal (digital) is involved in inputting an image from a personal computer or from a personal computer or other digital equipment. Therefore, the spatial light modulator which has a large magnification even when it is thin, and has a structure for writing under external light, a structure for colorization, and a spatial light modulator for writing and reading an image signal, and Provided is a display device serving as a display screen.

  2. Description of the Related Art Conventionally, display devices such as a film viewer generally use a CCD camera to convert a negative image into an electric signal and then display the image on a CRT or a liquid crystal display. In the case of a positive film, there has been a display device which optically projects and projects the image on a special screen. In addition, there have been various electronic image displays, mainly CRTs and liquid crystal displays, mainly moving images (displaying still images by switching one after another at a television rate).

  On the other hand, a Spatial Light Modulator (SLM) that can be used for a display device is an optical addressing method that receives an optical image signal as a device that can receive, store, read, and erase a two-dimensional signal. There is an electric address method of inputting a series electric signal. As the former optical addressing method, there is a liquid crystal spatial light modulator, which comprises a liquid crystal layer for modulating an optical signal and a layer for transmitting writing light energy to the liquid crystal. For example, when used as a liquid crystal projector, an optical image is projected on a small CRT, a liquid crystal spatial light modulator having a light transmitting layer and a liquid crystal layer sequentially provided on the entire surface of the CRT, and the image of the CRT is photoconductive. Irradiation on the surface of the body, for example, CdS, the light-irradiated part has a lower photoconductor impedance, and a higher voltage is applied than the light-irradiated part, and follows the intensity distribution of the input image. When a voltage is applied to the liquid crystal, the transmission amount of the liquid crystal changes due to the hybrid electric field effect of the liquid crystal. If this transmission amount is enlarged and projected on a screen, an image on a CRT is displayed on the screen. As a light transmission layer of such a liquid crystal spatial light modulator, a photoconductive material such as CdS, ZnSe, or a-Si, a photorefractive crystal such as BSO, BGO, or TBO, a group III-V, or a group II-VI. There are compound semiconductors, etc., high detection sensitivity, high resolution and high-speed response are required, as the conversion function layer of the liquid crystal layer, twisted nematic liquid crystal, electro-optical crystals such as LiNbO3, BSO, organic non-optical crystals, etc. are used, High-speed response speed and high contrast are required, and high-performance spatial light modulators have been developed.

  However, a display device using the CCD camera is suitable for displaying a silver halide photograph because the density of pixels of the CCD or the display, which is an image pickup device, is rough and, for example, the face of a photographed person cannot be determined. I didn't.

  In addition, regarding the display device using a positive film, the latitude (exposure latitude) of the positive film itself is narrow when it comes to shooting, and various users care about the conditions at the time of shooting. Also, it takes time and effort in the development process, and even when printing the last favorite piece, it also takes extra time, so it is unacceptable to general users in terms of cost and labor compared to positive film. there were.

  Another point to consider when using a negative film is the light quantity problem. The transmitted light amount of the developed negative film itself is less than 10% in an average scene. To enlarge and project this image requires an excessively large amount of light and requires a considerably large-scale apparatus. Therefore, there is considerable difficulty in creating a small and easy viewer as the object of the present invention.

  On the other hand, since the above-described display devices are mainly composed of moving images, the number of pixels (resolution) is extremely insufficient to view a still image, and the quality is changed to a silver halide print. Electronic display devices with such a feature did not exist. As a still image electronic display device similar to the above, there is a display device for high-definition television, which also has a slightly improved number of pixels as compared with a normal television, but the driving method is still a television rate, or Since it is driven at a rate of about 60 Hz, which is twice that, when a slightly brighter still image is displayed, flicker is perceived by human eyes, and it is hard to say that it is very easy to see.

  A display device according to the present invention is a display device using a spatial light modulation element capable of writing an image, converting the image, and reading the image, wherein the spatial light modulation element separates white light into respective colors on the writing side. Means for performing colorization of an image through the color separation means at the time of writing and at the time of reading, respectively.

  Further, the display device according to the present invention includes a spatial light modulator capable of writing and reading an image, a writing unit for sequentially writing the image for each pixel, and an optical system for forming an image of light from the writing unit. The display device comprises a plurality of reflection means for keeping a writing optical path length substantially constant when writing an image to the spatial light modulator. Further, in the display device, the image division means has an independent control means for each area or line so as to be independently in the optical writing mode. In the display device, the writing unit may convert a semiconductor laser that generates a laser beam corresponding to an image signal, a rotating polygon mirror that reflects the laser beam, and a light beam direction of the reflected light from the rotating polygon mirror. And a prism.

  In addition, the display device according to the present invention includes a spatial light modulator capable of writing and reading an image, a first light source for sequentially writing the image for each pixel, and a device for reading image data written in the spatial light modulator. A display device including a second light source, wherein the first light source includes a light blocking unit that blocks an area in which the writing function is performed on the spatial light modulation element from external light.

  Further, a spatial light modulator capable of writing and reading an image, a first light source for sequentially writing an image for each pixel, and a second light source for erasing image data written in the spatial light modulator are provided. In the display device provided, the second light source is operated before writing a new image on the spatial light modulation element.

  A display device according to the present invention includes a spatial light modulator capable of writing and reading an image, a first light source for sequentially writing an image for each pixel, and a second light source for erasing image data written in the spatial light modulator. In a display device provided with a second light source, a writing unit for writing a new image to the spatial light modulator and an erasing unit for functioning the second light source are separated by a predetermined distance.

  With the above-described configuration, according to the present invention, it is possible to provide a device for viewing a very high-quality image with a simple configuration, and to provide an inexpensive and small-sized product.

  In particular, the present invention is characterized by using a strobe device used for a small camera or the like as a negative illumination device, and synchronizing with this, supplying a potential to the SLM's photocon layer for a short time. It is possible to write an image on the SLM in a very short time, there is no need for a light-shielding cover for covering the SLM for removing external light, and the size can be reduced. Since the memory image after the above writing potential was cut off was illuminated with a lighting device such as a fluorescent lamp separate from the writing light, an extremely inexpensive device and structure made up a very high-quality display device. did it.

  Further, according to the present invention, high-quality images such as silver halide prints that have obtained citizenship as still images, and thin enough to be used for wall hanging, and not only silver halide films as image sources, but also Even image data and video signals from a CD-ROM or the like coming in through a personal computer can be displayed, and a very easy-to-use display device can be provided.

[First Embodiment]
[1] Configuration of Display Device FIGS. 1 to 4 are diagrams illustrating a film viewer according to a first embodiment suitable for the present invention, and FIG. 1 is an image diagram of a product used in the present embodiment. 1 shows a film viewer 2 of a display device and a developed film 1 (hereinafter, referred to as a “D-cart”) of an APS system, and by loading the D-cart 1 into the film viewer 2 of this product, one after another. The photographing screen is inverted negatively / positively, and is displayed one after another as a high-definition image. The film viewer 2 is a device such as an electronic album for viewing a photograph taken by himself on a table or the like.

  FIG. 2 is a structural diagram showing the structure of the contents of the photo stand 2 of the display device, and FIG. 3 is a structural diagram in which the optical system inside is devised so as to be more suitable for the device of FIG.

  In the structural diagrams of FIGS. 2 and 3, reference numeral 3 denotes a developed negative film on which an image taken by the photographer pulled out of the D-cart 1 is shown, one frame at a time by a known film winding mechanism (not shown). 2 is sent out. Numeral 4 is a milky white diffusing plate configured to uniformly diffuse the light emitted from the strobe device 5 and illuminate the negative film 3. Reference numeral 5 denotes a strobe device used for a camera or the like, which comprises a Xe tube, a metal halide lamp, a reflector, a light emitting circuit, and the like, and emits light in response to a trigger signal from a system IC described later. Reference numeral 6 denotes an orange base removing filter, which is an optical filter that has a blue color that is a complementary color of orange, and serves to remove the orange base color from the image of the negative film.

  Reference numeral 7 denotes a projection lens, which is constituted by a Gaussian type optical system with little distortion (distortion). In the present embodiment, the magnification is about 4 times, and a photoconductor layer (photoconductive layer; A negative film image is projected on the “photocon layer”. Further, reference numerals 8 and 9 are reflection mirrors, which reflect the projection image of the projection lens 7 and project the same on the photo-con layer of the SLM 10.

  Reference numeral 10 denotes a spatial light modulator SLM, which will be described in detail with reference to a principle diagram shown in FIG. In FIG. 4, reference numeral 10a denotes a color filter of pure colors R, G, and B or complementary colors Y, C, M, and K, which may be in close contact with the ITO 10c, for example, used in an image sensor CCD used in a video camera or the like. A fine-grained filter can be observed without deteriorating the silver halide image, which is desirable for the present apparatus. Further, 10b and 10h are polarizing plates sandwiching a later-described liquid crystal layer 10e, and in the configuration of FIG. 4, the polarizing direction of the polarizing plate 10b is opposite to the paper surface, and the polarizing plate 10h is horizontal to the paper surface. It has a so-called cross Nicol configuration. Reference numerals 10c and 10f denote ITOs of a transparent conductive film usually made of indium oxide or the like. The AC power supply 11 and a circuit for driving the AC power supply 11 have different polar potentials between the ITOs 10c and 10f of the respective transparent conductive films. Is configured to occur. Reference numeral 10d denotes a photocon layer (photoconductive layer), on which a photodiode layer made of an amorphous film or an OPC (organic semiconductor film: Organic PhotoConductor) or the like is formed. Is in close contact with the FLC 10e to be described below.

  Reference numeral 10e denotes an FLC of a liquid crystal layer. One surface of the FLC is in close contact with the photocon layer 10d as described above, and the other surface is in close contact with an alignment film 10i that regulates the alignment of liquid crystal molecules of the FLC. The alignment direction of the alignment film 10i is set such that the region where light has reached the OPC is in a light-blocking state and the region where light has not reached the OPC is in a transmission state. FLC is an abbreviation of “Fello Electric Liquid Crystal” and has a characteristic of high response speed. In the description of the present embodiment, an example using such a type of liquid crystal will be described.

  10 g is glass, which seals the liquid crystal layer 10 e together with the glass 10 j on the color filter 10 a and also serves to protect the other layers. Reference numeral 10k denotes a negative film image drawn close to the SLM 10 for explaining a virtual image of a pixel of the negative film 3 projected by the projection lens 7 of the projection optical system described above.

  Returning to FIGS. 2 and 3, reference numeral 13 denotes a straight tube type lighting device often used for flat displays and the like. Further, as shown in FIG. 2, reference numeral 14 denotes a pedestal supporting the photo stand 2, and a rotation axis for rotating the photo stand 2 by 90 degrees when viewing the image of the support portion 14a and the vertical position photographing. It has a portion 14b.

[2] Operation of Display Device The operation of the above configuration will be described with reference to the flowchart of FIG. When the user first uses the photo stand 2 to mount the D cart 1 on the photo stand 2 in order to view the image in the cartridge of the D cart 1, the photo stand 2 is incorporated in a known control circuit. According to the designated operation of the microcomputer, the loading of the D-cart 1 is detected in step # 1 and the thrust operation of feeding out the film in the cartridge of the D-cart 1 is performed in # 2. Position the first frame and stop.

  In this state, the apparatus enters the standby mode # 3, and waits for a signal from each switch of the operation panel (not shown). Next, when a signal for advancing the screen to a frame which is an empty signal such as a remote controller is input in # 4, the film is fed to the frame designated in # 5 by a known film winding mechanism, and the designated frame is To the aperture section of the photo stand 2 (corresponding to the negative film 3 in FIG. 2), and waits at # 6 as a command waiting state for displaying this frame.

  In this state, when a display command from the user is received in # 7, first, the SW12 is turned on to apply the AC power supply 11 between the ITOs 10c and 10f in # 8 in order to reset the image of the previously displayed frame. Later, the backlight illuminating device 13 is turned on in # 9, and the opposite electric field is applied between the ITO 10c and 10f from the AC power supply 11 in # 10.

  By such an operation, the FLC 10e is reset to the reset state by inverting all the cells to the horizontal state, which is partially shown in the FLC 10e shown in FIG. 4 at # 11. After performing the reset operation for a sufficient time for all the cells in the FLC 10e to be in the above state, the SW 12 is turned off in # 12, and the backlight illumination device 13 is turned off in # 13. From here, the flow of a new image writing operation is performed.

  The current state of the photo stand 2 is placed on a shelf such as an office desk or a home wall, for example, and the brightness of the environment is set at a brightness of about several hundred lux. These external lights are reduced by about half by passing through one polarizing plate 10h and the liquid crystal layer 10e, and are incident on the photocon layer 10d. However, in the current state, since the SW12 is open, the ITO 10c, No electric field is applied between the ITOs 10f, so the FLC 10e does not react.

  Here, the SW 12 is closed, the image of the negative film 3 is projected by the strobe light 5 via the projection lens or the reflection mirror, and an image is written on the SLM 10. Therefore, the operation must be performed promptly under the condition that the projected light has a specified S / N with respect to the external light. Fortunately, all the light emission of the strobe 5 performed in # 16 ends in about 500 μsec in time, so that the ON of the SW12 performed in # 15 is also performed at substantially the same time and at the same timing, and # 17 The electric field is rapidly cut by opening the SW 12 and the image recorded on the SLM 10 is thereafter turned on by the backlight illuminating device 13 in # 18, so that the user can visually recognize the display image of the SLM 10 in a transmissive illumination manner.

By the way, when the amount of light incident on the SLM 10 is calculated in a typical example, the luminance of a small strobe device to be mounted on the SLM 10 is ² billion cd / m ² or more, and the photo of the SLM 10 is A light amount of about 5000 lux is incident on the cone layer 10d.

  Thereafter, the photo stand 2 enters a standby state for receiving the next command of # 3. However, the user can continue to look at the image of the SLM 10 set by the above operation due to the memory characteristics of the FLC 10e.

  In the flowchart shown in FIG. 5, in S16, an electric field is applied between the ITOs 10c and 10f in the SLM 10, the image of the negative film 3 is projected with a strong light amount through the color filter 10a, and the impedance of the photocon layer 10d is reduced. It changes according to the amount of light, the applied electric field of the FLC 10e changes according to the value of the impedance, and the degree of the torsion angle of the FLC 10e changes according to the applied electric field, that is, a state in which the spatial light is modulated, After that, even if the SW 12 is turned off, the degree of twist does not change due to the memory characteristics of the FLC 10 e, and the backlight 13 turns on, so that the same video image as the negative film 3 can be displayed.

[Second embodiment]
[1] Configuration of the present embodiment FIGS. 6 to 10 show various aspects of the second embodiment, and FIG. 6 shows a display device 21 main body suitable for the present embodiment partially transparent and three-dimensional. The described configuration diagram is shown. The display device is of a flat type, and a prism 41 is moved below the spatial light modulator 30 over the entire surface of the spatial light modulator 30 by the mechanical scanning means 37, and is modulated by a video signal by the rotation of the polygon mirror 34 according to the movement. The light beam of the laser 32 is scanned by the prism 41 and is sequentially written in the spatial light modulator 30.

  In FIG. 6, in the display device 21, first, the scanner unit 31 is configured so that a film cartridge 22 having a photographed screen already developed can be loaded into a cartridge chamber (not shown). The film 23 is also sent out by a well-known film feeding mechanism, and a frame 23a designated by the user is sent out into an optical path of a CCD 26 described later.

  Reference numeral 24 denotes an illumination light source, which is usually located at a position which cannot be seen in a three-wavelength tube (a fluorescent tube having a well-balanced R, G, B wavelength) 24a and a reflection shade 24b and FIG. The film 23 is arranged at a position substantially in close contact with the film 23, and is sequentially fed by the film feeding mechanism.

  Reference numeral 25 denotes a projection lens for reducing and projecting the image of the above-mentioned film frame 23a onto the line CCD 26, and has a built-in aperture device which is a well-known autofocus and exposure adjustment mechanism.

  Reference numeral 26 denotes a line CCD, which is composed of three lines of R, G, and B, and a color filter of each color is formed in front of each line. The luminance information of each color is output from each line to an A / D converter 27 by a shift register, converted into digital information, and then enters a mixing circuit 28 and is input to a laser drive circuit 29. The output of the laser drive circuit 29 is connected to a semiconductor laser 32 to be described later and drives the semiconductor laser 32.

  Reference numeral 52 denotes an external input terminal for receiving image data from a CD-ROM or the like input via a personal computer 53 from the outside, and converts known digital image data (eg, image data such as JPEG or MPEG) into the apparatus. In the external data processing circuit 54, the semiconductor laser 32 described below is driven in accordance with the present apparatus, and the converted data is written into the SLM 30 described later as appropriate image data, and the data is converted so that the image can be viewed. It is configured to output to the mixing circuit 28.

  Further, reference numeral 30 denotes an SLM using FLC, a detailed view of which is shown in FIG. 7, which is a liquid crystal plate having a segment pattern having a memory property and having several images of the film read by the scanner unit 31 described above. Is written as a high-quality picture by the semiconductor laser 32 in the form of passing through a filter and a calculation unit, and the high-quality picture is provided to the user by illuminating it with a backlight according to a flowchart described later. Here, FIG. 7A is a state diagram at the time of irradiation from the semiconductor laser 32 at the time of writing to the SLM 30, and FIG. 7B is a state diagram at the time of irradiation of the backlight 43 after the end of writing. Is shown.

  In FIG. 6, a polarizing plate 30h is provided on the entire surface of the SLM 30, and a glass 30g is also provided on the entire surface under the polarizing plate 30h. In addition, the ITO 30c is formed in a stripe pattern on the entire surface of the SLM 30, and a transistor made of a thin film is provided for each pattern as a switch so that the electric field of each pattern can be controlled independently. I have.

  The SLM 30 will be described in detail with reference to the principle diagram shown in FIG. 7. Reference numeral 30a denotes 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 is a silver halide film. This is desirable for the present apparatus because it can be observed without deteriorating the image. Numerals 30b and 30h denote polarizing plates sandwiching a liquid crystal layer to be described later. In the configuration shown in FIG. 7, both 30b and 30h have a so-called parallel Nicol configuration in which the polarization direction is opposite to the paper surface. Reference numerals 30c and 30f denote ITO (transparent conductive film) which is usually made of indium oxide or the like. The AC power supply 50 and a circuit for driving the AC power supply 50 are configured so that different polar potentials are generated in the respective transparent conductive films by the SW 55. I have.

  As shown in FIG. 6, the transparent electrode of the ITO 30c forms an independent electrode pattern on a stripe with a very fine pitch in the vertical direction (scanning direction of a polygon mirror described later) in the drawing. A well-known transistor switch is configured so that power supply can be controlled independently.

  Reference numeral 30d denotes a photocon layer (photoconductor layer) on which a photodiode layer made of an amorphous film or an OPC (organic semiconductor film) is formed. One surface is in close contact with the above-described ITO 30c, and the other surface is to be formed. It is in close contact with the FLC 30e to be described. Reference numeral 30e denotes a liquid crystal layer, which can be formed of various types of liquid crystal devices, and has one surface adhered to the photocon layer 30d and the other surface adhered to the alignment film 30i as described above. Reference numeral 30g denotes glass, which serves to seal the liquid crystal layer 30e together with the glass 30j on the color filter 30a and at the same time protects the other layers.

  In addition, on the surfaces of the glass 30g and the polarizing plate 30h, strong external light from outside the light-shielding region of a light-shielding plate 38b described later shown in FIG. An antireflection film is provided on the surface so as not to deteriorate the S / N of the writing operation.

  A near-infrared semiconductor laser 32 includes an erasing laser 32a for erasing an old image already written on the SLM 30, and a writing laser 32b for writing image data newly sent from the film scanner unit 31. Have.

  In addition, it is preferable that the image erasing operation previously written in the SLM 30 be performed immediately before the operation of writing a new image. Can be shown. Specifically, the erasing operation is performed by applying an electric field of the ITO line several to several tens of lines before the newly written image in reverse to the time of writing the image, and irradiating infrared light of the erasing laser 32a in a DC manner. A uniform pre-writing state of the liquid crystal (in FIG. 7, the horizontally long state of the FLC 30e in the drawing) is created.

  Therefore, in order to simultaneously perform the erasing operation and the writing operation using different semiconductor lasers as in the present embodiment, if the voltage applied to the patterned ITOs 30c and 30f is 0 V on the non-pattern side (common side), for example, It is necessary to apply both positive and negative potentials to the common potential, such as -30 V on the erase side and +30 V on the write side.

  At this time, an electric field is also generated between +30 V and −30 V (an electric field in a direction parallel to the FLC). However, as described above, writing is performed between immediately adjacent patterns so as not to adversely affect writing and erasing. By performing writing and erasing in a pattern separated by a predetermined amount without erasing, the S / N of an image can be improved.

  The operation of actually erasing or writing is performed in a portion of the interior covered by a light-shielding plate 38b which will not be exposed to external light. Will switch.

  Reference numeral 33 denotes a first convex lens unit for substantially forming an image of a semiconductor laser (hereinafter simply referred to as a laser) 32 on a polygon surface of the polygon mirror 34. The polygon mirror 34 has a shaft 34a supporting a shaft (not shown). And has an octahedral mirrored outer shape.

  Reference numeral 35 denotes a projection lens for projecting the image from the polygon mirror 34 onto the SLM 30 described above. The projection lens 35 projects the image of the semiconductor laser 32 according to the optical path passing through the total reflection prism 41 and the reflection mirror 42 shown in the side view of FIG. An image is formed on the photocon layer 30d of the SLM 30.

  Reference numeral 36 denotes a stepping motor which transmits the output from the output shaft to the helicoid screw shaft 37 and rotates, so that the female helicoid 38 meshing with the helicoid screw shaft 37 and the integral light shielding through a groove (not shown) of the main body 21. The plate 38b is moved in the horizontal direction in the figure.

  The light shielding plate 38b prevents external light from passing through the color filter portion 30a and the liquid crystal portion 30e of the SLM 30 to the photocon layer 10d to which an electric field is applied when resetting an image by the semiconductor laser 32 or writing a new image. Plays a role. This is for improving the S / N of the written image.

  A coupling gear 37a formed coaxially with the helicoid screw shaft 37 meshes with a gear portion 39a of a second helicoid shaft 39, which will be described later, so as to transmit the power of the stepping motor 36. Reference numeral 39 denotes a second helicoid shaft, which is rotatably supported by a main body by a guide member (not shown). A second female helicoid 40 is screw-coupled to the helicoid portion, and a gear is provided when the aforementioned stepping motor 36 rotates. The rotation is transmitted to the second helicoid shaft 39 via the portions 37a and 39a, and the second female helicoid 40 is moved left and right in the drawing.

  In the present embodiment, the lead of each screw of the helicoid shaft 37 and the second helicoid shaft 39 is 2: 1 so that the second female helicoid 40 moves exactly half the stroke with respect to the female helicoid 38. The optical path length from the lens 35 for forming an image on the SLM 30 of the semiconductor laser 32 to the SLM 30 is set to be substantially constant no matter where the SLM 30 is written. ing.

  The aforementioned second female helicoid 40 has a prism supporting portion 40a that supports a triangular prism 41 described later. As shown in FIG. 8, the laser light output from the semiconductor laser 32 enters the prism 41 through the polygon mirror 34 and the imaging lens 35, is reflected twice, and has a direction of 180 deg. Then, the light is incident on the reflection mirror 42, and the direction is further changed to 90 deg. The image is changed to form an image on the photocon layer 30d of the SLM 30.

  Reference numeral 51 denotes a detection pattern for outputting position information on the striped ITO 30c on the SLM 10. In this case, the pulse pattern of the detection pattern 51 is detected by a known photosensor, and the incident positions of the semiconductor lasers 32a and 32b are determined. With these configurations, accurate irradiation positions of the semiconductor lasers 32a and 32b are detected by these configurations, and the switching timing of each of the above-mentioned ITO patterns 30c is controlled to invert on the erasing side and the writing side, respectively. The applied electric field can be applied.

  The reflection mirror 42 is supported by a support portion (not shown) of the female helicoid 38 and moves integrally with the female helicoid 38.

  Therefore, even if the triangular prism 41, the reflection mirror 42, and the light shielding plate 38b are moved to the positions 41 'and 42', respectively, by the rotation of the stepping motor 36, the distance from the imaging lens 35 to the photocon layer 30d of the SLM 30 is increased. Is to be configured so as not to change.

  Reference numeral 43 denotes a known backlight, which includes a light source composed of a three-wavelength fluorescent tube and the like and a known reflective light guide plate and the like. Lights up when viewing the written image by turning off the switch, and provides the user with a good backlight illumination image.

[2] Operation of the Present Embodiment The operation of the present device 21 having the above configuration will be described with reference to the flowcharts of FIGS. First, in step # 101, the display is in a normal display state, in other words, a command from a known remote controller is received from the user in a state where the user is waiting for a command.

  Next, in step # 102, the state of the apparatus is checked. In step # 103, the positions (states) of the light-shielding plate 38b, the mirror 42 and the prism 41 or the female helicoids 38 and 40 for image writing are checked. Regardless of the operation or the display operation, the position of this unit becomes a key. First, an abnormal operation is detected.

  Here, when the position of the light-shielding plate 38b is in an abnormal place, the recovery operation of # 104 and below is performed. First, in step # 104, the stepping motor (STM) 36 is driven in the CW direction, and the mirror 42 and the light shielding plate 38b in FIG. 6 are brought to the leftmost standby position in FIG. Move to # 108.

  On the other hand, in # 103, it is determined in # 106 whether the position of the light shielding plate 38b is in the leftmost position (first standby position) or the rightmost position (second standby position) in FIG. The following two types of control are performed depending on the location.

  If it is in the first standby position, it is determined in step # 108 whether or not the screen 23a of the film 23 of the film scanner is the designated screen of the remote controller. The film is fed to the screen designated by the user by the film feeding mechanism, and the process exits from step # 108, which is the determination flow. Thereafter, at step # 114, a determination flag of P = 0 is set in the temporary memory RAM of the present system, and at # 115, the display backlight 43 is turned off.

  If it is determined in step # 106 that the light shielding plate 38b and the like are in the second standby position, it is determined in step # 110 whether the screen 23a of the film 23 of the film scanner is the screen desired by the user. If not, the film feed to the designated screen is performed as described above at # 111, and further, the film is continuously fed to the final position of the screen at # 112. That is, when the light shielding plate 38b or the like is writing to the rightmost end in FIG. 6 in the previous image writing operation to the SLM 30, the next writing is performed in the opposite direction (from the right end to the left end), so that For a system in which writing is performed from the left end, a series of operations are designed to be performed more quickly.

  After the above-described operation is performed in # 112, a determination flag of P = 1 is set in the RAM in # 113 as reverse scan information, and the process proceeds to a step of turning off the backlight 43 in # 115.

  As a matter of course, before the step # 115, the image previously written to the SLM 30 is visible to the user, and the sequence of turning off the display of only the minimum operation of the following operation of writing a new image to the SLM 30 is performed. , Creating a comfortable operation for the user.

  As described above, after the backlight 43 is turned off in # 115 and the display disappears (although the display may be dark due to external light), the polygon mirror 34 starts rotating in # 116. The flag storing the direction of the write operation to the SLM 30 is read out at # 117, and when the write is in the forward direction, the film is fed in the normal rotation direction at # 118, In step # 119, the stepping motor (STM) 36 is driven in the CCW direction to move the light shielding plate 38b and the like to the right in FIG.

  In this movement, by reading the above-described detection pattern 51 with a foot sensor (not shown), the writing position is accurately detected by the semiconductor laser 32, and an electric field on the opposite side is applied only to the conductive pattern 30c to be erased in # 120. At the same time, a positive electric field is applied to the pixel portion of the conductive pattern portion (accurately to the photo-con layer) after being erased in # 120, and at the same time, the film portion responds to the write signal (film scanner portion). (A signal obtained by inverting the read signal of the pixel from the negative) to the write signal of the semiconductor laser 32b to write a new image.

  Such an operation is continuously performed in # 122, and it is determined whether or not one frame of the film has been completed in # 123. If it is determined that it has not been completed, the process returns to # 117. Then the previous operation is repeated again. When the end is determined in # 123, the process further proceeds to # 128.

  If it is determined in step # 117 that P = 1, that is, if scanning in the reverse direction is necessary, the film is driven in reverse by the feed motor in step # 124, and the stepping motor 36 is moved in the CW direction in synchronization with this. The semiconductor laser 32b is driven to accurately detect the position signal by the detection pattern 51, and then the semiconductor laser 32b is used as a preceding erase laser (that is, a reverse electric field is applied to the pattern portion hit by the semiconductor laser 32b). It is used as a writing laser (steps # 126 and # 127). This operation is continued until all the images of one frame of the film are written in the same manner as described above, and when the end is determined in # 123, the process proceeds to # 128.

  Thereafter, in steps # 128 to # 131, the stepping motor 36, the polygon mirror 34, and the known feeding motor for feeding the film 23 are stopped, and in step # 131, the backlight 43 is turned on and the user is now written. You can show the image. In step # 132, the remote controller enters the standby state for reception, which is the start step of the operation, and a series of operations ends.

  In the present embodiment, the R, G, and B signals from the film scanner CCD 26 are A / D converted, written to the SLM 30 and displayed to the user, but the three color signals sent from the personal computer are sent to the mixing circuit 28. It is naturally easy to insert and display.

  Also, it is possible and easy to display the output of the CDROM and the video signal in the same manner.

  In the above embodiment, two types of SLMs have been described with reference to FIGS. 4 and 7, but there is no difference in basic functions. Further, by using the FLC which can respond at a high speed, the switching of the film frame can be speeded up.

FIG. 1 is a conceptual diagram showing a display cartridge of an APS system as an image input medium suitable for the present invention and a typical appearance of the present apparatus. FIG. 2 is a sectional view of a display device according to the present invention. FIG. 2 is a sectional view of a display device according to the present invention. FIG. 3 is a cross-sectional view of an SLM used in a display device according to the present invention. 4 is an operation flowchart of the display device according to the present invention. FIG. 3 is a conceptual view of transmission of a display device according to the present invention. FIG. 3 is a cross-sectional view of an SLM used in a display device according to the present invention. FIG. 2 is a sectional view of a display device according to the present invention. FIG. 4 is a partially enlarged view of a transmission conceptual diagram of the display device according to the present invention. 4 is an operation flowchart of the display device according to the present invention. 4 is an operation flowchart of the display device according to the present invention.

Explanation of reference numerals

1,22 Film cartridge 2 Photo stand 3,23 Negative film 4 Diffusion plate 5 Strobe device 6 Optical filter 7,25 Projection lens 8 Reflection mirror 9 Reflection mirror 10,30 SLM
10e, 30e FLC
13 Illumination device 14 Pedestal 26 CCD line sensor 27 A / D converter 28 Mixing circuit 29 Laser driver 32 Semiconductor laser 34 Polygon mirror 41 Triangular prism 43 Backlight

Claims (10)

  A display device using a spatial light modulator that can write an image, convert the image, and read the image, wherein the spatial light modulator has a color separating unit that separates white light into each color on the writing side, A display device for performing colorization of an image through the color separation means at the time of reading and at the time of reading. In a display device including a spatial light modulation element capable of writing and reading an image, a writing unit for sequentially writing an image for each pixel, and an optical system for imaging light from the writing unit,
A display device, comprising: a plurality of reflection means for keeping a writing optical path length substantially constant when writing an image on the spatial light modulator.   3. The display device according to claim 2, wherein said image dividing means has an independent control means for each area or line so as to be independently in an optical writing mode.   3. The display device according to claim 2, wherein the writing unit includes a semiconductor laser that generates a laser beam corresponding to an image signal, a rotating polygon mirror that reflects the laser beam, and a light beam reflected from the rotating polygon mirror. A display device, comprising: a prism for changing a direction. A display device comprising: a spatial light modulator capable of writing and reading an image; a first light source for sequentially writing an image for each pixel; and a second light source for reading image data written to the spatial light modulator. At
The display device, wherein the first light source includes a light blocking unit for blocking an area where the writing function is performed on the spatial light modulation element from external light.   6. The display device according to claim 5, wherein the spatial light modulator is writable by being divided into a plurality of areas, and is provided with independent control means for controlling each of the areas or lines independently so as to be in the writing mode. A display device. A spatial light modulator capable of writing and reading an image, a first light source for sequentially writing an image for each pixel, and a second light source for erasing image data written to the spatial light modulator are provided. In display devices,
A display device, wherein the second light source is operated before writing a new image on the spatial light modulator.   8. The display device according to claim 7, wherein said spatial light modulator is capable of dividing an image into a plurality of areas and erasing an image, and comprising independent control means for controlling each area or line independently so as to be in an image erasing mode. A display device characterized by the above-mentioned. A spatial light modulator capable of writing and reading an image, a first light source for sequentially writing an image for each pixel, and a second light source for erasing image data written to the spatial light modulator are provided. In display devices,
A display device, wherein a writing unit for writing a new image to the spatial light modulation element and an erasing unit for functioning the second light source are separated by a predetermined amount.   10. The display device according to claim 9, wherein said spatial light modulator is capable of dividing an image into a plurality of areas and erasing an image, and comprising independent control means for controlling each area or line independently so as to be in an image erasing mode. A display device characterized by the above-mentioned.

Images