JP2001277591A - Image reflection device, camera and printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reflection device, a camera and a printer capable of reducing in size and accelerating in speed. SOLUTION: The image reflection device 14 reflects image information on a photosensitive part 13. The reflection device 14 comprises a plurality of light emitting pixels 6A, 6B and 6C arranged in a planar state between ITOs 2 and counter electrodes 4 opposed to each other. The image information from the device 14 is reflected on the photosensitive part 13 in a steady state. Accordingly, a device for moving the part 13 at the image reflecting time is not required.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image projection device used in a camera, a printer, or the like, for projecting image information such as a photographed image on a photosensitive section.

[0002]

2. Description of the Related Art Cameras, printers, and the like use an image projection device that projects image information such as a photographed image on a recording medium such as a photosensitive film.

[0003] As this image projection apparatus, Japanese Patent Laid-Open No. 11-1 is disclosed.
There is a conventional example shown in Japanese Patent No. 98441.

[0004] This conventional example is used for an image scanner or a printer.
Arranged side by side in the sub-scanning direction, a plurality of luminous fluxes are emitted in a line-sequential manner from the LED array by a signal based on color image information, and the optical axes of these luminous fluxes are substantially matched by one-line conversion means. An image is formed on a photosensitive film (silver salt film) through the, and the photosensitive film is transported in the sub-scanning direction by a transport roller.

[0005]

In the above-mentioned conventional example, the image information is exposed by irradiating the light emitted from the three-color LED array line by line to the photosensitive film while feeding the photosensitive film in the sub-scanning direction. It is a configuration to project on a film.

Therefore, a mechanism for accurately rotating the transport roller in synchronization with the light emitting operation from the LED array is required, and there is a problem that the apparatus becomes large and complicated. Furthermore, since the LED array, the image forming means, and the photosensitive film are arranged on a straight line, the size of the apparatus is disadvantageously increased from this point as well.

Further, in the conventional example, since image information is written on the photosensitive film line by line, there is a problem that it takes a long time to complete the image projection.

An object of the present invention is to provide an image projection device, a camera and a printer which can be reduced in size and speed.

[0009]

SUMMARY OF THE INVENTION Therefore, the present invention aims at achieving the above object by arranging a plurality of color light emitting pixels in a plane between electrodes facing each other.

More specifically, an image projection apparatus according to the present invention is an image projection apparatus for projecting image information on a photosensitive portion, wherein light-emitting pixels of a plurality of colors are arranged in a plane between electrodes facing each other. It is characterized by being constituted.

In the present invention, an image displayed by light emission by the light emitting element is directly projected on the photosensitive portion, so that the image forming means as in the conventional example becomes unnecessary, and the image projecting device becomes thin. Become. In addition, since the device for projecting an image on the photosensitive unit is formed in a planar shape, the image information from the image projecting device is projected while the photosensitive unit is stationary, so the photosensitive unit moves when the image is projected. This eliminates the necessity of a device for performing the operation, reduces the size of the structure of the image projection device, and enables high-speed scanning.

Here, in the image projection device of the present invention,
The luminescent pixel may emit light at a time and instantaneously reflect the image information on the photosensitive portion.

With this configuration, since the image can be projected onto the photosensitive portion at one time, the time for projecting the image is reduced.

On the other hand, in the image projection apparatus according to the present invention, the luminous pixels are arranged in a plurality of columns, and the luminous pixels in the plurality of columns are illuminated for each column to sequentially display the image information on the photosensitive portion. It is also possible to adopt a configuration in which

With this configuration, when an image is projected on the photosensitive section, a large current does not flow through the image projection device at one time, so that a device for safely flowing a large current is not required.

Further, it is preferable that the luminescent pixel emits light for each of a plurality of divided blocks and sequentially reflects the image information on the photosensitive portion.

In this configuration, one block is formed from a predetermined number of columns, and a plurality of these blocks are arranged. Since the luminescent pixels emit light for each block, a large current flows through the image projection device at one time. In addition, the time required for displaying an image is reduced as compared with the case where the light emitting pixels emit light for each column.

Preferably, a switch is provided on each of the electrodes corresponding to the luminescent pixels arranged in the plurality of columns, and these switches are preferably sequentially opened and closed.

In this configuration, when the switches are operated, the light emitting pixels arranged in a plurality of rows emit light in order, and the image information is sequentially recorded on the photosensitive portion. Therefore, an image can be projected on the photosensitive portion with a simple structure.

In the image projection apparatus according to the present invention, it is preferable that the planar light emitting section having the issuing pixels and the photosensitive section are in close contact with each other.

In this configuration, since the light emitting section and the photosensitive section are in close contact with each other, it is possible to display a sharp image without blurring.

Further, it is preferable that the luminescent pixel is an organic EL element.

In this configuration, since the organic EL element is more resistant to temperature changes than other self-luminous pixels, it is possible to provide an image projection device that is more resistant to changes in temperature environment.

In addition, since the organic EL element can be arranged in the immediate vicinity of the photosensitive section, an image projected on the photosensitive section may be blurred,
Blurring can be avoided.

Further, it is preferable that the structure also serves as an image display section for displaying the image information.

In this configuration, in order to confirm the image to be projected, it is only necessary to look directly into the image projection device, so that it is not necessary to separately provide an image display unit. Therefore, the number of parts can be reduced. In addition, it is preferable to provide a configuration including an image reversing circuit for reversing the image projected on the photosensitive section.

In general, when an image is projected on a photosensitive section by an image projecting apparatus, an image displayed by the image projecting apparatus and an image projected by the photosensitive section are inverted. Therefore, in the present invention, by inverting the image projected on the photosensitive unit and displaying the image on the image projecting device, a correct image displayed on the photosensitive unit can be seen even when directly looking into the image projecting device. .

Further, in the present invention, it is preferable that the image projection apparatus having the above-described configuration is provided in a camera or a printer.

By incorporating the image projection device into a camera, it is possible to provide a camera that has a simple structure and can be miniaturized, and that can project an object onto a photosensitive portion at high speed.

Further, by incorporating the image projection device into a printer, it is possible to provide a printer that has a simple structure and can be reduced in size, and that can print on a photosensitive portion at high speed.

[0031]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show a first embodiment applied to a camera.
This embodiment is shown.

FIG. 1 is a perspective view of the camera 10, and FIG.
FIG. 1 is a cross-sectional view illustrating a schematic configuration of a camera 10.

Referring to FIGS. 1 and 2, the camera 10
The structure is such that a lens 12 is provided in front of the main body 11, and the image projection device 14 of the first embodiment for projecting an image photographed by the lens 12 on the photosensitive portion 13 is provided inside the main body 11.

A lid 11A is detachably provided on the back of the main body 11. When the lid 11A is detached, the image projection device 14 is exposed from the back of the camera 10. That is, the image projection device 14 is configured to also serve as an image display unit. In the first embodiment, the lid 11A
May be fixed to the main body 11, and an LCD monitor 11B as an image display unit for displaying an image projected by the image projection device 14 may be provided on the back surface of the lid 11A (see an imaginary line in FIG. 1).

The photosensitive section 13 is formed in a sheet shape from a silver halide film or other photographic paper as a recording medium on which an image is projected, and is carried into a predetermined position inside the main body 11 by a pair of conveying rollers 15. It is carried out. The pair of transport rollers 15 are configured to rotate while sandwiching the photosensitive unit 13, and are rotationally driven by a motor 15A.

A guide member 16 for positioning the photosensitive unit 13 with respect to the image projection device 14 is provided in order to reliably carry in and carry out the photosensitive unit 13 with these transport rollers 15. The guide member 16 is attached to the lid 11A via, for example, a spring member (not shown) so as to have a biasing force in the direction of the light emitting unit 17, and the guide member 16 allows the main body 11 to be moved. The photosensitive section 13 carried into a predetermined position inside the transparent substrate 1 constituting the light emitting section 17
(See FIG. 3).

The image projection device 14 includes a planar light emitting section 17 for emitting and displaying an image input from the lens 12, and a control section 18 for electrically controlling the light emitting section 17.

FIG. 3 shows the structure of the light emitting section 17.

In FIG. 3, the light emitting section 17 is
A planar EL light-emitting image unit 19 disposed to face the
And a DC power supply 20 for supplying electric power for causing the EL light emission image unit 19 to emit light.

The EL light emitting image unit 19 has a transparent substrate 1 made of glass or plastic, ITO2 provided on a plane of the transparent substrate 1 as a transparent electrode, and functions as a light blocking layer provided on the ITO2. A resin black resist 3, a counter electrode 4 disposed opposite to the ITO 2, an electron transport layer 5 provided between the ITO 2 and the counter electrode 4, and light emitting pixels 6A, 6B, 6 of a plurality of colors.
C.

The ITO 2 is formed on one surface of the transparent substrate 1 to a predetermined thickness by a sputtering method or an evaporation method.

The black resist 3 is formed at a predetermined pitch and a predetermined thickness by photolithography.

The counter electrode 4 is made of AlLi or another general material.

The electron transport layer 5 is formed by vacuum-depositing an undoped aluminum quinolyl complex. The electron transport layer 5 facilitates electron injection from the cathode, prevents quenching of the electrode by keeping the light emitting portion away from the cathode, and forms a good contact with the cathode.

The light emitting pixel 6A is a red light emitting organic EL element, the light emitting pixel 6B is a blue light emitting organic EL element, and the light emitting pixel 6C is a green light emitting organic EL element.
The organic EL elements constituting the light emitting pixels 6A, 6B, 6C are as follows.
It is formed from a predetermined composition.

There are various methods for patterning an organic EL element on a substrate. In the case where the pattern is formed by an ink-jet method as an example, the composition for an organic EL element is mainly composed of a conjugate for forming a light emitting pixel. A high molecular weight organic compound precursor and at least one kind of fluorescent dye for changing the luminescent characteristics of the luminescent pixel.

As the precursor, for example, a precursor of PPV (poly (para-phenylenevinylene)) or a derivative thereof is preferable. The precursor of PPV or a derivative thereof is soluble in water or an organic solvent and can be polymerized, so that a high-quality optically thin film can be obtained. Furthermore, PPV is a conductive polymer having strong fluorescence and π electrons of a double bond are non-polarized on a polymer chain, so that a high-performance organic EL device can be obtained.

The precursor of PPV or a PPV derivative is soluble in water and is polymerized by heating after film formation to form PPV.
Form a layer.

The content of the precursor represented by the PPV precursor is preferably from 0.01 to 10.0% by weight, more preferably from 0.1 to 5.0% by weight, based on the whole composition. If the amount of the precursor is too small, it is insufficient to form a conjugated polymer film, and if it is too large, the viscosity of the composition increases,
It may not be suitable for highly accurate patterning by the ink jet method.

The composition for an organic EL device contains at least one fluorescent dye. This makes it possible to change the light emission characteristics of the light emitting pixel, and is effective, for example, as a means for improving the light emitting efficiency of the light emitting pixel or changing the light absorption maximum wavelength (emission color).

That is, the fluorescent dye can be used not only as a light emitting pixel material but also as a dye material having a light emitting function itself. For example, almost all the energy of excitons generated by carrier recombination on the conjugated polymer organic compound molecule can be transferred to the fluorescent dye molecule.
In this case, since light emission occurs only from a fluorescent dye molecule having a high fluorescence quantum efficiency, the current quantum efficiency of the EL element also increases.
Therefore, when a fluorescent dye is added to the composition for an EL element, the emission spectrum of the emission pixel also becomes that of a fluorescent molecule, which is also effective as a means for changing the emission color.

The fluorescent dye used in the red light emitting pixel 6A is preferably rhodamine or a rhodamine derivative having a red color light. These fluorescent dyes are small molecules and are soluble in aqueous solutions.
It is easy to form a uniform and stable luminescent pixel with good compatibility.

Examples of such a fluorescent dye include rhodamine B, rhodamine B base, rhodamine 6G, rhodamine 101 perchlorate, and the like, and a mixture of two or more of these may be used.

The fluorescent dye used in the blue light emitting pixel 6B is preferably distyrylbiphenyl having blue color light and derivatives thereof. These fluorescent dyes, like the red fluorescent dyes described above, are low-molecular and therefore soluble in a mixed solution of water and alcohol, and have good compatibility with PPV and facilitate formation of luminescent pixels.

Further, as the other fluorescent dye having blue light emission, coumarin and its derivatives are preferable. These fluorescent dyes, like the red fluorescent dye described above, are low-molecular and thus soluble in aqueous solutions, and have good compatibility with PPV and facilitate formation of luminescent pixels.

Examples of such fluorescent dyes include coumarin, coumarin-1, coumarin-6, coumarin-7, coumarin 120, coumarin 138, coumarin 152, coumarin 153, coumarin 311, coumarin 314, coumarin 334, coumarin 337, and coumarin 337. Coumarin 343 and the like.

As another fluorescent dye having blue light emission, it is preferable to use tetraphenylbutadiene (TPB) or a TPB derivative. These fluorescent dyes, like the red fluorescent dye and the like, have low molecular weight and are soluble in an aqueous solution, and have good compatibility with PPV and facilitate formation of luminescent pixels.

The fluorescent dye used in the green light-emitting pixel 6C is preferably quinacridone having green light emission and its derivative. These fluorescent dyes, like the red fluorescent dye described above, are low-molecular and thus soluble in aqueous solutions, and have good compatibility with PPV and facilitate formation of luminescent pixels.

These fluorescent dyes are preferably added in an amount of 0.5 to 10% by weight, more preferably 1.0 to 5.0% by weight, based on the solid content of the precursor of the conjugated organic polymer compound. Is more preferred. If the amount of the fluorescent dye is too large, it is difficult to maintain the weather resistance and durability of the luminescent pixel. On the other hand, if the amount is too small, the effect of adding the fluorescent dye as described above cannot be sufficiently obtained.

The precursor and the fluorescent dye are preferably dissolved or dispersed in a polar solvent. Since the polar solvent can easily dissolve or uniformly disperse the precursor, the fluorescent dye, and the like, the solid component in the organic EL composition at the nozzle for the inkjet may be attached or clogged. This contributes to maintaining a high ink contact angle at the nozzle orifice, thereby preventing the ink from bending.

Such polar solvents include, for example, water, alcohols such as methanol and ethanol, which are compatible with water, N, N-dimethylformamide (DMF), N-methylpyrrolidone (NMP), dimethylimidazoline (D
Organic solvents or inorganic solvents such as MI) and dimethyl sulfoxide (DMSO), and a mixture of two or more of these solvents may be used.

Further, it is preferable that the composition contains a wetting agent. Thereby, it is possible to effectively prevent the composition from drying and solidifying at the ink jet nozzle opening. Examples of such a wetting agent include polyhydric alcohols such as glycerin and diethylene glycol, and a mixture of two or more of these may be used.

The addition amount of the wetting agent is preferably about 5 to 20% by weight based on the total amount of the composition. In addition, other additives and a film stabilizing material may be added, and for example, a stabilizer, a viscosity adjuster, an antioxidant, a pH adjuster, a preservative, a resin emulsion, a leveling agent and the like can be used.

A plurality of these luminescent pixels 6 A, 6 B, 6 C are arranged in a grid-like space partitioned by the resin black resist 3. That is, the light emitting pixel 6
A, 6B, and 6C are arranged in a plurality of columns in that order, and a plurality of A, 6B, and 6C are arranged in each column in that order. By controlling the voltage applied between the counter electrode 4 and ITO2, pictures (patterns, characters, etc.) of various colors are emitted from the EL light-emitting image unit 19, and light for displaying the pictures is emitted from the ITO2 and the transparent substrate. Exposure 1 through 1
3 is reflected.

The negative electrode of the DC power supply 20 is connected to the ITO 2, and the positive electrode of the DC power supply 20 is connected to the counter electrode 4. A switch device 7 is provided between the negative pole and ITO2 connected to the negative pole.

FIG. 4 shows the configuration of the switch device 7. In FIG. 4, a switch device 7 includes a plurality of switch fixed terminals 7A provided in ITO 2 corresponding to a plurality of columns of luminescent pixels 6A, 6B, 6C, a switch movable terminal 7B connected to a negative pole, and a switch. A driving device (not shown) for driving the movable terminal 7B is provided. Each switch fixed terminal 7A and switch movable terminal 7
B constitute a plurality of switches, and the switch movable terminal 7B moves while contacting the switch fixed terminal 7A, whereby these switches are sequentially opened and closed.

FIG. 5 shows a schematic configuration of the control section 18 for controlling the driving of the light emitting section 17.

In FIG. 5, the controller 18 controls the lens 12
A CCD 21 for detecting image information input from the CCD 21, a CCD control circuit 22 for controlling an analog signal from the CCD 21 to a digital signal, and performing various image corrections such as white balance adjustment, interpolation processing, and color correction.
An image processing circuit 23 for recording the corrected image information;
U24, JPEG25 for compressing and decompressing image information,
An import-out port 26 connected to the JPEG 25; and an image inverting circuit 27 for inverting and displaying an image processed by the image processing circuit 23 and projected on the photosensitive section 13 on the LCD monitor 11B and the EL light emitting image unit 19.
And a switch control circuit 28 for driving the switch 7
And a discharge control circuit 29 for controlling the motor 15A of the transport roller 15.

As shown in FIG. 6, the CCD 21
(Cyan), M (Magenta), Y (Yellow), G (Green)
CCD (Charge Coupled Device) in which a plurality of pixels having complementary color filters are arranged in a matrix.
Color images can be taken. In the first embodiment, a CCD having primary color filters of R (Red), G (Green), and B (Blue) may be used.

In FIG. 5, the CPU 24 controls the driving of the image processing circuit 23 and the paper discharge control circuit 29.

JPEG (Joint Photographic Experts G)
roup) 25 is about 167 of 256 gradations of each of R, G and B colors
This is an irreversible image compression method that can handle images of 100,000 colors and is generally used. It is possible to adjust the stored image quality by changing the compression ratio. JPEG compression can be performed by software using a control device, or a dedicated circuit can be used for speeding up.

The JPEG 25 is connected to an external RAM 50.
After the image information recorded in the RAM 50 is processed by the image processing circuit 23, the image information can be projected from the light emitting unit 17 to the photosensitive unit 13.

The import-out port 26 can be connected to an external PC (personal computer) not shown.

The image inverting circuit 27 includes an upside-down inverting circuit 27A that only inverts the image in order to display the image on the LCD monitor 11B in a correct form,
And an up / down / left / right inversion circuit 27B for inverting up / down / left / right to display the image in a correct form.

According to the first embodiment, the following effects can be obtained.

(1) The image captured by the lens 12 is
An image projection device 14 for projecting an image of the light emitting pixels 6A of a plurality of colors between the ITO 2 and the counter electrode 4 facing each other.
6B and 6C are arranged in a plane, so that the image information from the image projection device 14 is projected in a state where the photosensitive portion 13 is stationary, so that the device for moving the photosensitive portion 13 when projecting the image. Becomes unnecessary. In addition, no image forming means is required between the image projection device 14 and the photosensitive section 13, and the space between them can be reduced. Therefore, the structure of the image projection device 14 can be reduced in size, and high-speed operation can be performed.

(2) The image projection device 14 has the light emitting pixels 6
A, 6B, 6C are arranged in a plurality of columns, and switches 7 are provided on the electrodes of the luminescent pixels 6A, 6B, 6C arranged in the plurality of columns, respectively. These switches 7 are sequentially opened and closed. Light emitting pixels 6A, 6 arranged in a plurality of columns
B and 6C emit light sequentially for each column, and image information is sequentially recorded on the photosensitive section 13.

Accordingly, when an image is projected on the photosensitive section 13, a large current does not flow through the image projection device at one time, so that a device for safely flowing a large current is not required, and the structure is simplified. Moreover, this effect can be achieved with a simple structure of the switch 7.

(3) The light emitting pixels 6A, 6B, 6C are organic EL
Since the organic EL element is composed of elements, the organic EL element is more resistant to temperature changes than other self-luminous pixels, so that it is possible to provide the image projection device 14 that is resistant to changes in temperature environment. In addition, the organic EL elements 6A, 6B, and 6C serve as the photosensitive unit 1.
3, the image projected on the photosensitive unit 13 can be prevented from being blurred or blurred.

(4) If the image display unit for displaying the photographed image is also used as the image projection device 14, the lens 1
In order to confirm the image projected in Step 2, the image projection device 14 may be directly viewed.

Accordingly, since it is not necessary to separately provide an image display section, the number of components can be reduced.

(5) On the other hand, the image projection device 14
In addition, if an LCD monitor 11B as an image display unit is provided on the lid 11A of the main body 11, an image projected by the lens 12 can be confirmed even when the photosensitive unit 13 is mounted on the main body 11.

(6) Since the image projecting device 14 is provided with the image inverting circuit 27 for inverting the image projected on the photosensitive section 13, the image projected on the photosensitive section 13 is inverted to project the image. Device 14 and LCD monitor 11B
The image projection device 14 and the LCD
Even if the user looks into the monitor 11B, a correct image displayed on the photosensitive unit 13 can be seen.

(7) In particular, the image inverting circuit 27
An up / down inverting circuit 27A that inverts only the top and bottom in order to display it in the correct form on the CD monitor 11B, and an up / down / left / right inverting circuit 27B that inverts up, down, left and right in order to display the image in the correct form on the EL emission image unit 19 Therefore, correct image display can be performed according to the individual image display states of the LCD monitor 11B and the EL light emitting image unit 19.

(8) In the first embodiment, since the image projecting device 14 is incorporated in the camera 10, the structure of the camera 10 is simple and the size can be reduced. Can be reflected.

(9) Since the light emitting section 17 and the photosensitive section 13 are arranged in close contact, it is possible to display a sharp image without blurring.

Next, a second embodiment of the present invention will be described with reference to FIG.

In the second embodiment, the image projection device is applied to a printer. Here, in the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 7 showing the schematic configuration, the printer 3
Numeral 0 includes a printer main body 31 and an image projection device 34 incorporated in the printer main body 31.

The printer main body 31 has a cassette 31A containing a plurality of sheet-shaped photosensitive portions 13. After the image is projected by the image projecting device 34 inside the printer main body 31, the photosensitive section 13 stored in the cassette 31A is discharged from the paper discharge section 31B of the printer main body 31.

An LCD monitor 11B is provided on the front of the printer main body 31 as an image display section for displaying an image projected by the image projection device.

The image projection device 34 is composed of a planar light emitting section 17 for displaying an image by light emission, and a control section 38 for electrically driving and controlling the light emitting section 17.

The light emitting section 17 is composed of an EL light emitting image unit 19 disposed inside the printer main body 31 so as to face the photosensitive section 13 and a DC power supply device 20 for supplying electric power for causing the EL light emitting image unit 19 to emit light. (See FIG. 3).

The control unit 38 includes an import-out port 26 for taking in image information from an external digital camera and other information devices 40, and a JP for compressing and decompressing image information input from the import-out port 26.
An EG 25, an image processing circuit 23 for correcting the image information from the JPEG 25, and recording the corrected image information, and a CPU for driving and controlling the image processing circuit 23
24, and an up-down reversing circuit 27A as an image reversing circuit for reversing and displaying the image processed by the image processing circuit 23 and projected on the photosensitive unit 13 on the LCD monitor 11B.

Therefore, in the second embodiment, in addition to the effects of (1), (2), (3), (5), (6) and (9) of the first embodiment, the following effects can be obtained. it can.

That is, (10) In the second embodiment, since the image projection device 34 is incorporated in the printer 30, the structure of the printer 30 is simple and the size of the printer 30 can be reduced. Becomes possible.

Next, a third embodiment of the present invention will be described with reference to FIG.

In the third embodiment, a plurality of luminescent pixels 6A, 6B, 6C arranged in a matrix are individually controlled to be turned on and off, and the other configuration is the same as that of each of the above embodiments.

FIG. 8 is a schematic diagram showing the configuration of a driving device for electrically controlling one luminescent pixel 6A.

In FIG. 8, the driving device controls the driving of the luminescent pixel 6A, which is an organic EL element, and includes a power supply line 43 and a ground line 44. A predetermined drive voltage is applied to the power supply line 43.

The luminescent pixel 6A is directly connected to the power supply line 43, but is connected to the ground line 44 via the TFT 45. The TFT 45 converts a drive voltage applied from the power supply line 43 to the ground line 44 into a drive current corresponding to a control voltage applied to the gate electrode, and supplies the drive current to the pixel 6A.

The capacitor 4 is connected to the gate electrode of the TFT 45.
6 and the capacitor 46 is connected to the ground line 44.
It is connected to the. The signal line 4 is connected to the capacitor 46 and the gate electrode of the TFT 45 via the switching element 47.
8 is connected, and a control terminal of the switching element 47 is connected to a control line 49 as a control electrode.

The capacitor 46 holds the control voltage and
The switching element 47 is applied to the gate electrode of the FT 45
Turns on and off the connection between the capacitor 46 and the signal line 48. A control voltage for driving and controlling the light emission luminance of the light emitting pixel 6A is supplied to the signal line 48, and a control signal for controlling the operation of the switching element 47 is input to the control line 49.

The driving device having the above-described structure can drive and control the light emitting pixel 6A with a variable light emission luminance. In this case, a control signal is input to the control line 49 to control the operation of the switching element 47 so that the switching element 47 is turned on.
, A control voltage corresponding to the emission luminance of the emission pixel 6A is supplied to the capacitor 46 and held. Since the control voltage held by the capacitor 46 is applied to the gate electrode of the TFT 45, the drive voltage constantly applied to the power supply line 43 is
The driving current is converted into a driving current corresponding to the gate voltage by T45 and supplied to the light emitting element 6A. This state is continued even if the operation of the switching element 47 is turned off by the control signal of the control line 49.

Since the drive current converted from the drive voltage of the power supply line 43 by the TFT 45 and supplied to the light emitting pixel 6A corresponds to the voltage applied from the capacitor 46 to the gate electrode of the TFT 45, the light emitting pixel 6A is connected to the signal line 48. Will emit light at a luminance corresponding to the control voltage supplied to the pixel.

When the above-described driving device is applied in this embodiment, the luminescent pixels 6B and 6C are used in addition to the luminescent pixel 6A.
They are arranged in a matrix of rows and n columns, and control voltages and control signals are input to m signal lines 48 and n control lines 49 in a matrix, and the control voltages are individually applied to (m × n) capacitors 46. To be held.

Therefore, in the third embodiment, the same operation and effect as (1), (3) to (9) of the first embodiment can be obtained, and each of the luminescent pixels 6A, 6B, 6C is turned on / off. Since the image can be controlled, the image projected by the image projection device can be controlled in detail.

The present invention is not limited to the above-described embodiment, but includes other configurations that can achieve the object of the present invention, and also includes the following modifications.

For example, in the first and second embodiments, the luminescent pixels 6A, 6B, 6C are arranged in a plurality of columns, and the switches 7 are provided on the electrodes of the luminescent pixels 6A, 6B, 6C arranged in the plurality of columns. , These switches 7 are sequentially opened and closed. However, in the present invention, it is not always necessary to provide these switches 7, and the image projection devices 14 and 3 are not necessarily provided.
A current may be applied to the four light emitting units 17 at one time. In this configuration, although a device for allowing a large current to flow safely is required, the image can be projected onto the photosensitive unit 13 at one time, so that the time for projecting the image is further reduced. Further, as in each of the above embodiments, when sequentially supplying current to the light emitting pixels 6A, 6B, 6C arranged on a plane,
The predetermined area of a plurality of columns of the luminescent pixels 6A, 6B, and 6C may be defined as one block, a plurality of the blocks may be formed, and the blocks may be sequentially energized.

Further, the light emitting pixels are not limited to the organic EL elements, and other self light emitting pixels may be used.

Further, in the present invention, it is not always necessary to provide the image inverting circuit 27.

The photosensitive portion 13 is not limited to a sheet shape, but may be a film shape wound in a roll shape. In this case, in order to project an image from the image projecting devices 14 and 34, the film-shaped photosensitive portion 13 may be extended in a plane.

[0114]

As described above, according to the present invention,
It is possible to achieve an effect that the size and speed of the image projection device, the camera and the printer can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire camera to which an image projection device according to a first embodiment of the present invention is applied.

FIG. 2 is a sectional view schematically showing the camera.

FIG. 3 is a sectional view showing a main part of the first embodiment.

FIG. 4 is a schematic perspective view showing a switch portion of the first embodiment.

FIG. 5 is a block diagram of the first embodiment.

FIG. 6 is a schematic view showing a CCD of a camera.

FIG. 7 is a block diagram of a second embodiment of the present invention.

FIG. 8 is a schematic view showing a main part of a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent substrate 2 ITO (transparent electrode) 4 Counter electrode 5 Electron transport layer 6A Red light emitting pixel 6B Blue light emitting pixel 6C Green light emitting pixel 7 Switch device 10 Camera 11B LCD monitor as an image display part 12 Lens 13 Photosensitive part 14,34 Image Projection device 17 Light emitting section 18, 38 Control section 19 EL light emitting image unit 20 DC power supply 27 Image inverting circuit 30 Printer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/225 // H04N 101: 00 F term (Reference) 2C162 AE23 AE28 AF06 AF60 FA04 FA16 FA34 5C022 AA13 AC01 AC42 AC69 AC77 5C051 AA02 CA11 DA06 DB02 DB06 DB08 DB26 DB28 DB31 DC02 DC03 DC05 DC07 DE01 EA01 5C074 AA11 BB05 CC04 DD22 FF15 GG06 GG08 GG11 HH04 HH06

Claims (11)

[Claims] 1. An image projection apparatus for projecting image information on a photosensitive portion, wherein a plurality of light emitting pixels of a plurality of colors are arranged in a plane between electrodes facing each other. . 2. The image projection device according to claim 1, wherein the luminescent pixels emit light at a time and instantly project the image information on the photosensitive portion. 3. The image projection apparatus according to claim 1, wherein the luminescent pixels are arranged in a plurality of rows, and the luminescent pixels in the plurality of rows emit light for each column, and the image information is sequentially projected on the photosensitive section. An image projection device characterized in that the image is projected. 4. The image projection device according to claim 3, wherein the luminescent pixels emit light for each of a plurality of divided blocks and sequentially project the image information on the photosensitive unit. Projection device. 5. The image projection device according to claim 3, wherein a switch is provided for each of the electrodes corresponding to the luminescent pixels arranged in the plurality of columns, and these switches are sequentially opened and closed. An image projection device, characterized in that: 6. The image projection apparatus according to claim 1, wherein the planar light emitting section having the issuing pixels and the photosensitive section are in close contact with each other. apparatus. 7. The image projection device according to claim 1, wherein said luminescent pixels are organic EL elements. 8. The image projection device according to claim 1, wherein the image projection device also serves as an image display unit that displays the image information. 9. An image projection apparatus according to claim 1, further comprising an image inversion circuit for inverting an image projected by said photosensitive section. . 10. A camera comprising the image projection device according to claim 1. Description: 11. A printer comprising the image projection device according to claim 1. Description: