JP3515673B2 - Erasing device for electronic developing camera - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera using a recording medium for electronically developing a subject image obtained by a photographing optical system, and more particularly to an apparatus for erasing an image recorded on this recording medium.

[0002]

2. Description of the Related Art Conventionally, for example, in Japanese Patent Laid-Open No. 5-2280, there has been proposed a photographic material in which a recording medium itself is directly and electronically developed, and the developed visible image can be immediately obtained. In this specification, such a recording medium that is electronically developed is referred to as an electro-developing recording medium, and a camera using this recording medium is referred to as an electro-developing camera.

[0003]

The image recorded on the electro-developing recording medium can be erased by heating at a predetermined temperature. However, providing the erasing device in the electro-developing camera causes a problem that the structure in the electro-developing camera becomes complicated and large.

It is an object of the present invention to provide an erasing device capable of erasing an image recorded on an electro-developing recording medium without increasing the size and structure of the electro-developing camera.

[0005]

An erasing device for an electro-developing camera according to the present invention comprises an electro-developing recording medium for electronically developing an image and an electro-developing recording medium for reading and erasing an image. A light source for illuminating and a light source control means for controlling the intensity of the light output by the light source are provided, and when the light source erases an image under the control of the light source control means ,
Outputs light with an intensity higher than that when reading out an image
It is characterized by that.

The light source outputs a laser beam, for example. The light source may also be configured to output parallel light. Further, the light source may output linear light having a length equal to or larger than the width of the electro-developing recording medium.

The erasing device may have a light source moving mechanism for moving the light source in a direction perpendicular to the width direction of the electro-developing recording medium.

The light source is a laser diode and can operate in the LED oscillation region or the laser oscillation region. For example, when it operates in the LED oscillation region, it can output illumination light, and when it operates in the laser oscillation region, it can output erasing light. Is.
Alternatively, the light source may output illumination light or erase light by adjusting the light intensity output in the laser oscillation region.

The electro-developing recording medium is, for example, an electrostatic information recording medium in which electric charges are generated in accordance with an image, and a charge holding medium in which a visible image is generated in response to the electric charges and which can hold the visible image. have. The charge holding medium is, for example, a liquid crystal display element using memory type liquid crystal.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of an electro-developing camera to which an embodiment of the present invention is applied.

When the camera body 11 is viewed from the front, a photographing optical system 12 having a photographing lens and the like is provided at the substantially center of the front surface, and a strobe 13 is provided on the upper right side of the photographing optical system 12. A release switch 14 is provided on the side opposite to the strobe 13. The finder 15 is provided at the center of the upper surface of the camera body 11 and
Extends from the front to the back. A scanning switch 16 and an erasing switch 18 are provided on the side of the finder 15 and on the upper surface of the camera body 11. Also,
In order to output the image signal obtained by this camera to an external recording device or the like, an output terminal 17 is provided on the lower portion of the side surface of the camera body 11.

FIG. 2 is a block diagram of the electro-developing type camera. The system control circuit 20 is a microcomputer and controls the entire electronic development type camera.

The photographing optical system 12 includes a plurality of lens groups,
A diaphragm 12a is provided. An electro-developing recording medium 30 is disposed behind the taking optical system 12. A quick return mirror 21 is provided between the photographing optical system 12 and the electro-developing recording medium 30, and a shutter 22 is provided between the quick return mirror 21 and the electro-developing recording medium 30. A focus plate 23 a of the finder optical system 23 is arranged above the quick return mirror 21.

Aperture 12a, quick return mirror 21
And the shutter 22 are respectively the iris drive circuit 2
4, driven by a mirror drive circuit 25 and a shutter drive circuit 26, and these circuits 24, 25, 26 are controlled by an exposure control circuit 27. The exposure control circuit 27 operates according to a command signal output from the system control circuit 20. That is, during exposure control, the photometric sensor 2
According to the control of the exposure control circuit 27 based on the output signal from 8, the aperture of the diaphragm 12a is adjusted by the iris drive circuit 24. The quick return mirror 21 is normally set at a down position (inclined state shown by a solid line) for observing an object and guides the light passing through the photographing optical system 12 to the finder optical system 23. In operation, under the control of the exposure control circuit 27, the mirror drive circuit 25 causes the mirror drive circuit 25 to rotate upward to set the up position (horizontal state shown by the broken line). Although the shutter 22 is normally closed, during the shooting operation, the shutter drive circuit 26 opens it for a predetermined time under the control of the exposure control circuit 27, whereby the light passing through the shooting optical system 12 is transferred to the electro-developing recording medium 30. The light receiving surface is irradiated.

A voltage (that is, a recording medium activation signal) is applied to the electro-developing recording medium 30 under the control of the recording medium driving circuit 41, and the electro-developing recording medium 30 is exposed during the voltage application. The shooting optical system 12
The image formed by is developed as a visible image. The recording medium drive circuit 41 operates according to a command signal output from the system control circuit 20.

A scanning mechanism 50 is provided near the electro-developing recording medium 30. The scanning mechanism 50 supports a light source device 42, a scanner optical system 43, and a line sensor 44, and these are moved along the electro-developing recording medium 30 by scanning by the scanning mechanism 50. As the line sensor 44, for example, a 2000-pixel CCD one-dimensional sensor or the like can be used. The light source device 42 outputs a laser beam having a predetermined light intensity. The light source device 42 is movable along the front surface of the shutter 22, that is, the front surface of the electro-developing recording medium 30, and the line sensor 44 is movable along the back surface of the electro-developing recording medium 30. The scanner optical system 43 is provided between the light source device 42 and the line sensor 44. In the scanning by the scanning mechanism 50, the scanner optical system 43 is located between the electro-developing recording medium 30 and the line sensor 44, and therefore the electro-developing recording medium 3
The image developed by 0 is illuminated by the light source device 42 and formed on the light receiving surface of the line sensor 44 by the action of the scanner optical system 43. That is, the scanner optical system 4
3 is provided in the middle of the path of the light transmitted through the electro-developing recording medium 30, and the line sensor 44 is the scanner optical system 4
3 moves on the image forming plane of the image.

The illumination light source drive circuit 45 controls ON / OFF of the light source device 42 and the light intensity of the laser beam, and the line sensor drive circuit 47 controls the reading operation of the image signal generated in the line sensor 44. . The movement control of the scanning mechanism 50 is performed by the scanner system drive circuit 46. These circuits 45, 46 and 47 are controlled by the system control circuit 20.

The image signal read from the line sensor 44 is amplified by the amplifier 61 and converted into a digital signal by the A / D converter 62. The digital image signal is temporarily stored in the memory 64 after being subjected to processing such as shading correction and gamma correction in the image processing circuit 63 under the control of the system control circuit 20. The memory 64 may have a storage capacity for only one horizontal scanning line output from the line sensor 44, but may be a memory having a storage capacity for one frame. Further, the memory 64 has an E ² PROM, and a correction value such as shading correction is stored in this E ² PROM.

The image signal read from the memory 64 is
It can be input from the image processing circuit 63 to the interface circuit 65, subjected to predetermined processing such as format conversion, and output to an external computer (not shown) or the like via the output terminal 17. The image signal output from the image processing circuit 63 can be recorded in a recording medium such as an IC memory card in the image recording device 67. The interface circuit 65 and the image recording device 67 operate according to a command signal from the system control circuit 20.

The system control circuit 20 is connected to an operating section 70 including a release switch 14, a scanning switch 16, an erasing switch 18, and the like. According to the operation of the release switch 14 and the scanning switch 16, the image pickup operation (recording operation) and the reading operation of the image signal are performed, and according to the operation of the erase switch 18, the image signal erasing operation is performed. Further, the system control circuit 20 has a display element 68 for displaying various setting states of the electro-developing camera.
And a strobe drive circuit 69 for controlling light emission of the strobe 13 are connected.

FIG. 3 is a diagram showing the structure of the electro-developing recording medium 30, which is basically the same as that disclosed in Japanese Patent Laid-Open No. 5-2280. That is, the electro-developing recording medium 30 includes the electrostatic information recording medium 31 and the charge holding medium 32.
The electrostatic information recording medium 31 and the charge holding medium 3 are provided.
The voltage 2 is applied by the power supply 33. The electrostatic information recording medium 31 includes a substrate 34, an electrode layer 35, and an inorganic oxide layer 36.
And a photoconductive layer 37 are laminated, and the photoconductive layer 37 is formed by polymerizing a charge generation layer 37a and a charge transport layer 37b. The charge holding medium 32 is configured by enclosing the liquid crystal 40 between the liquid crystal support 38 and the liquid crystal electrode layer 39. The charge transport layer 37b of the electrostatic information recording medium 31 and the liquid crystal support 38 of the charge holding medium 32 face each other with a minute gap.

The power supply 33 is on / off controlled by the recording medium drive circuit 41. When the power supply 33 is in the on state, the electrode layer 3
5 and the liquid crystal electrode layer 39, that is, the electrostatic information recording medium 3
A voltage is applied to 1 and the charge holding medium 32. When the electrostatic information recording medium 31 is exposed in this voltage applied state, charges are generated on the electrostatic information recording medium 31 according to the image. Since the strength of the electric field acting on the liquid crystal 40 changes according to this charge, the image is displayed on the liquid crystal 40 as a visible image, and the subject image is developed. The charge holding medium 32 is a liquid crystal display element using a memory type liquid crystal, and the developed visible image is held even if the electric field is removed. This liquid crystal display device can erase the developed visible image by heating to a predetermined temperature with a laser beam, and in that case, the same recording medium can be repeatedly used.

FIG. 4 is a perspective view showing the structure of the scanning mechanism 50 and its vicinity. Moving member 52 of scanning mechanism 50
Is slidably supported by a pair of guide shafts 51,
It has first and second leg portions 52a and 52b and a support portion 52c. The first leg portion 52a projects between the quick return mirror 21 and the shutter 22, and the second leg portion 52b.
Overhangs on the back side of the electro-developing recording medium 30. The support portion 52c is provided further behind the second leg portion 52b. The light source device 42 is attached to the first leg 52a, the scanner optical system 43 is attached to the second leg 52b, and the line sensor 44 is attached to the support 52c. Both the light source device 42 and the line sensor 44 extend in the horizontal direction. The rack 53 fixed to the moving member 52 meshes with a pinion 54, and this pinion 54 meshes with a gear 56 provided on the output shaft of the scan drive motor 55.

When the image is not read on the electro-developing recording medium 30, the moving member 52 is out of the optical path between the photographing optical system 12 and the electro-developing recording medium 30, for example, the electro-developing recording medium 30. It is located below. As will be described later, when the image recorded on the electro-developing recording medium 30 is read out, the scan drive motor 55 rotates, the moving member 52 rises, and the line sensor 44 scans. Scan in the direction orthogonal to the longitudinal direction. Similarly, when the image recorded on the electro-developing recording medium 30 is erased, the moving member 52 is moved up by driving the scan driving motor 55, that is, the light source device 42 moves to the width of the electro-developing recording medium 30. Move in the direction perpendicular to the direction.

FIG. 5 is a plan view showing the light source device 42.
In this figure, a plurality of laser diodes 42b are attached to a support frame 42a, and these are arranged linearly. The number of the laser diodes 42b is four in FIG. 5, but is actually larger. A collimator lens 42c is provided in front of the laser diode 42b. The divergence angle θ of the laser beam output from the laser diode 42b is, for example, 30 ° to 40 °, but is converted into parallel light by the action of the collimator lens 42c and is irradiated on the light receiving surface of the electro-developing recording medium 30. The laser light output from the light source device 42 is linear, and its length L is the width of the electro-developing recording medium 30 (the first leg portion 52 in FIG. 4).
(corresponding to the length direction of b)) or more.

FIG. 6 shows the relationship between the forward current flowing through the laser diode 42b and the intensity of light output from the laser diode 42b. The value of forward current is the first threshold value I _th
When it is smaller than (I " _op ), the light intensity is small (P"), the laser diode 42b acts in the LED oscillation region and outputs illumination light. When the value of the forward current is slightly larger than the first threshold value I _th (I'op), the laser diode 42b operates in the laser oscillation region, but the light intensity is small (P '), and therefore the illumination light is output. When the value of the forward current exceeds the first threshold value I _th , the increase rate of the light intensity suddenly increases, and when the forward current exceeds the second threshold value (not shown) and is, for example, I _op , the light intensity is increased. P is large enough to erase the image recorded on the electro-developing recording medium 30. That is, the laser diode 42b outputs erasing light.

FIG. 7 shows an example of the illumination light source drive circuit 45. The forward voltage side terminal of each laser diode 42b is connected to the power supply V, and the reverse voltage side terminal of each laser diode 42b is connected to the first and second resistors RA and RB. The first resistor RA is connected to the collector of the first transistor 42d, and the second resistor RB is connected to the collector of the second transistor 42e. The emitters of the first and second transistors 42d and 42e are grounded, and the voltages corresponding to the control signals A and B output from the system control circuit 20 are applied to the bases.

The resistance value of the first resistor RA is the second resistor RB.
Greater than the resistance value of. The resistance value of the first resistor RA is, for example, RA = (V−VF) / I ′ _op (1) or RA = (V−VF) / I ″ _op (2), and the resistance value of the second resistor RB is The value is, for example, RB = (V-VF) / I _op (3), where VF is the forward voltage drop of the laser diode 42b.

When reading the image recorded on the electro-developing recording medium 30, the control signal A is set to the high level (Hi) and the control signal B is set to the low level (Lo). Therefore, the first transistor 42d is turned on, the second transistor 42e is turned off, and the voltage applied to the laser diode 42b is the first
Will be relatively low due to the resistance RA of. That is, the intensity of the light emitted from the laser diode 42b is relatively small, and this is the illumination light. Here, when the first resistance RA has a resistance value determined by the expression (1), the laser diode 42b operates in the laser oscillation region and the illumination light is laser light, but the first resistance RA Has a resistance value defined by the equation (2), the laser diode 42b
Operates in the LED oscillation region and outputs illumination light.

On the other hand, when the image recorded on the electro-developing recording medium 30 is erased, the control voltage signal A is set to Lo and the control voltage signal B is set to Hi . Therefore, the first transistor 42d is turned off and the second transistor 42d is turned off.
Transistor 42e becomes conductive, and the voltage applied to the laser diode 42b becomes relatively high due to the second resistor RB. That is, the laser diode 42
The light intensity of the laser light (erasing light) emitted from b is relatively high.

FIG. 8 shows a recording operation (photographing operation) of an image on the electro-developing recording medium 30 and a line sensor 4 for detecting this image.
4 is a timing chart showing an operation of reading by No. 4. FIG. 9 is a flowchart of the recording operation, and FIGS.
2 is a flowchart of the image reading operation. The recording operation and the reading operation will be described with reference to these drawings.

When it is detected in step 101 that the release switch 14 has been pressed (reference S11),
In step 102, an output signal from the photometric sensor 28, that is, a photometric value is detected. In step 103,
The exposure calculation is started based on this photometric value (reference S1).
2). When it is confirmed in step 104 that the exposure calculation is completed (reference S14), the recording operation is performed in step 105 and subsequent steps in accordance with the calculation result.

In step 105, the aperture of the diaphragm 12a changes from the fully open state to the predetermined aperture (reference S15), and the quick return mirror 21 changes from the down state to the up state (reference S16). When it is confirmed in step 106 that the change of the mirror 21 to the up state and the adjustment of the aperture of the diaphragm 12a are completed, the shutter 22 is opened in step 107 (reference S17), and
In step 108, a recording medium activation signal is output (reference S13), and a voltage is applied to the electro-developing recording medium 30.

When the exposure period obtained by the exposure calculation has elapsed and the completion of exposure is detected in step 109, the shutter 22 is closed in step 110 (reference S18). Upon completion of the closing operation of the shutter 22, step 111 is executed, the mirror 21 changes to the down state (reference S19), and the diaphragm 12
a is opened to the fully open state (reference S20). Step 1
At 12, the output of the recording medium activation signal is stopped (reference S21).

That is, the recording medium activation signal is output while the shutter 22 is open, and a predetermined voltage is applied to the electro-developing recording medium 30 during this period. Then, by exposing in this state, the subject image is developed as a visible image on the electro-developing recording medium 30. This visible image is retained even when the output of the recording medium activation signal is stopped.

When it is confirmed in step 113 that the mirror 21 and the diaphragm 12a have returned to the initial state, the driving of the mirror 21 and the diaphragm 12a is stopped in step 114, and this recording operation routine ends.

Next, when the scanning switch 16 is pressed, scanning by the scanning mechanism 50 is started, and the reading operation routine described below is executed.

When the scanning switch 16 is pressed, a scanner drive command signal is output. When it is confirmed in step 201 that the scanner drive command signal is output (reference S31), the shutter 22 is opened in step 203 (reference S32). In step 204, the light source device 42 is turned on, and the system control circuit 20 outputs the Hi control signal A and the Lo control signal B. That is, the light source device 42 acts as an illumination light source, and the electro-developing recording medium 30 is illuminated (reference S33).

In step 205, the scanner drive signal is output (reference S34), the scan drive motor 55 rotates in the normal direction, and the moving member 52 of the scanning mechanism 50 starts to rise from the position below the electro-developing recording medium 30 ( (S35).
In step 206, the line sensor drive power supply is turned on (reference S36).

In step 207, the line sensor 44
When it is confirmed that is set to the reading start position,
In step 208, the output of the scanner drive signal is stopped (reference S37), and the scan drive motor 55 is stopped (reference S38). This stop operation is controlled by, for example, counting pulse signals for rotationally driving the scan drive motor 55.

Next, in step 210, the exposure to the line sensor 44 is started and the charge is stored (reference S39). In step 211, the line sensor 4 is detected by, for example, detecting that a certain time has elapsed.
When it is confirmed that the exposure of 4 is completed, step 21
At 2 the reading of the line sensor 44 is started and 1
The output of the image signal of the horizontal scanning line segment is started (reference S4).
0). In step 213, the scan drive motor 5
A scanner system drive signal for rotating the No. 5 in the forward direction is output (reference S41), and the moving member 52 starts to move further (reference S).
42).

If it is confirmed in step 214 that the reading of the line sensor 44 is completed during the movement of the moving member 52, the reading scanning is stopped in step 215 (reference S43). The end of this reading is controlled by counting the pulse signals for driving the line sensor 44 output from the line sensor drive circuit 47, for example. Step 214
If the end of reading is not confirmed at step 215, step 215 is skipped and step 216 is executed to determine whether or not the line sensor 44 is set at the position of the next horizontal scanning line, that is, the next reading position. If the line sensor 44 is not located at the position of the next horizontal scan line, steps 214-216 are performed again.

In step 216, the line sensor 44
When it is confirmed that is set to the position of the next horizontal scanning line, the output of the scanner system drive signal is stopped in step 217 (reference S44), and the scan drive motor 55 is stopped (reference S45). Next, in step 218, similarly to step 214, it is confirmed that the reading of the line sensor 44 is completed, and in step 219, the reading is stopped. That is, even if the loop of steps 214 to 216 is exited without executing step 215, the reading of the line sensor 44 is ended in step 219.

Next, at step 221, it is judged if the read operation for all the horizontal scanning lines is completed. The number of all horizontal scanning lines is, for example, 2000, and in step 221, the value of the counter that is counted up each time the reading operation for one horizontal scanning line is completed is
It is determined whether 2000 has been reached. If the reading of all the horizontal scanning lines has not been completed, the process returns to step 210 and the above-described operation is repeated.

When the reading of all the horizontal scanning lines is completed in this way (reference S50), the process moves from step 221 to step 222, the drive power source of the line sensor 44 is switched to the off state (reference S51), and in step 223. The light source device 42 is set to the off state (reference S52). That is, the control signals A and B are both Lo
Stipulated in. In step 224, the shutter 22
Is closed (reference S53), and in step 225, a scanner system drive signal for reversing the scan drive motor 55 is output (reference S54), and the moving member 52 begins to descend (reference S55).

When it is confirmed in step 226 that the line sensor 44 has returned to the initial position during the lowering operation of the moving member 52, the output of the scanner system drive signal is stopped in step 227 (reference S56), and scanning is performed. The drive motor 55 is stopped (reference S57). The operation of detecting the initial position in step 226 is performed based on a signal output when a part of the moving member 52 crosses a photo interrupter (not shown), for example.

FIG. 13 is a timing chart showing the operation of erasing the image recorded on the electro-developing recording medium 30. 14 and 15 are flowcharts of the image erasing operation. The erase operation will be described with reference to these drawings.

By pressing the erase switch 18,
An erase command signal is output. When it is confirmed in step 301 that the erase command signal is output (reference S6)
1) In step 302, the shutter 22 is opened (reference S62). In step 303, the light source device 42 is turned on, and the system control circuit 20 outputs L
A control signal A of o and a control signal B of Hi are output. That is, the light source device 42 functions as an erasing device and irradiates the electro-developing recording medium 30 with a light beam having a light intensity higher than that in the reading operation (that is, erasing light) (reference S63).

In step 304, the scanner drive signal is output (reference S64), the scan drive motor 55 rotates in the normal direction, and the moving member 52 of the scanning mechanism 50 starts to rise from the position below the electro-developing recording medium 30 ( Reference sign S65).
When it is confirmed in step 305 that the laser diode 42b is set at the predetermined horizontal scanning line position, in step 306 the output of the scanner drive signal is stopped (reference S66) and the scan drive motor 55 is stopped ( Reference sign S67). As a result, the electro-developing recording medium 30 is heated by the erasing light output from the laser diode 42b, and the image (horizontal scanning line) in that portion is erased.

Next, at step 307, it is judged if the erase operation for all the horizontal scanning lines has been completed. In step 307, as in step 221 of FIG. 12,
The value of the counter that is incremented each time the read operation for one horizontal scanning line is completed is, for example, 2000.
Is determined. If the erase operation of all horizontal scanning lines has not been completed, the process returns to step 304 and the above-described operation is repeated.

When the erasing of all the horizontal scanning lines is completed, the process proceeds from step 307 to step 308, the light source device 42 is turned off, and the control signals A and B are both set to Lo (reference S68). In step 309, the shutter 22 is closed (reference S69), and in step 310, a scanner system drive signal for rotating the scan drive motor 55 in the reverse direction is output (reference S70), and the moving member 52 starts to descend (reference S71).

When it is confirmed in step 311 that the moving member 52 has returned to the initial position during the lowering operation of the moving member 52, the output of the scanner system drive signal is stopped in step 312 (reference S72), and the scanning is performed. The drive motor 55 is stopped (reference S73).

As described above, in the present embodiment, the intensity of the output light beam of the light source device 42 used when reading the image recorded on the electro-developing recording medium 30 is controlled, so that the electro-developing recording medium 30 on the electro-developing recording medium 30 is controlled. The image is erased by heating it at a predetermined temperature. Therefore, it is not necessary to provide a special erasing device in the electro-developing camera, the structure in the electro-developing camera can be simplified, and the electro-developing camera can be downsized.

During the operation of erasing the image on the electro-developing recording medium 30, the laser diode 42b may act in either the laser oscillation region or the LED oscillation region. Depending on the purpose, the resistance of the first resistor RA may be changed. Value is (1) or (2)
It may be determined according to the formula.

The light source device 42 is not limited to the laser light source, and may be a light source other than the laser light source.

[0056]

As described above, according to the present invention, an image recorded on an electro-developing recording medium can be erased without making the internal structure of the electro-developing camera complicated and upsized.

[Brief description of drawings]

FIG. 1 is an external view of an electro-developing camera to which an embodiment of the present invention is applied.

FIG. 2 is a block diagram showing a circuit configuration of the electro-developing camera of FIG.

FIG. 3 is a diagram showing a configuration of an electro-developing recording medium.

FIG. 4 is a perspective view showing a scanning mechanism.

FIG. 5 is a plan view showing a light source device.

FIG. 6 is a diagram showing a relationship between a forward current flowing through a laser diode and the intensity of light output from the laser diode.

FIG. 7 is a circuit diagram showing a configuration of an illumination light source drive circuit.

FIG. 8 is a timing chart showing a recording operation and an image reading operation.

FIG. 9 is a flowchart of a recording operation.

FIG. 10 is a flowchart of a read operation.

FIG. 11 is a flowchart of a read operation.

FIG. 12 is a flowchart of a read operation.

FIG. 13 is a timing chart showing an erase operation.

FIG. 14 is a flowchart of an erase operation.

FIG. 15 is a flowchart of an erase operation.

[Explanation of symbols]

30 electro-developing recording medium 42 Light source device 42b Laser diode

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Claims (9)

(57) [Claims] 1. An electro-developing recording medium for electronically developing an image, a light source for illuminating the electro-developing recording medium for reading and erasing the image, and an intensity of light output by the light source. and a light source control means for controlling the light source by the control of the light source control means, the image
When erasing, the erasing device for an electro-developing camera, which is characterized by outputting light having an intensity higher than the intensity at the time of reading the image . 2. The erasing device for an electro-developing camera according to claim 1, wherein the light source outputs a laser beam. 3. The erasing device for an electro-developing camera according to claim 1, wherein the light source outputs parallel light. 4. The erasing device for an electro-developing camera according to claim 1, wherein the light source outputs linear light having a length equal to or larger than the width of the electro-developing recording medium. 5. The erasing apparatus for an electro-developing camera according to claim 1, further comprising a light source moving mechanism for moving the light source in a direction perpendicular to a width direction of the electro-developing recording medium. 6. The light source is a laser diode and L
It can work in ED oscillation region or laser oscillation region,
The erasing device for an electro-developing camera according to claim 1, wherein the illuminating light can be output when operating in the LED oscillation region, and the erasing light can be output when operating in the laser oscillation region. 7. The light source is a laser diode and L
It can work in ED oscillation region or laser oscillation region,
The erasing device for an electro-developing camera according to claim 1, wherein the illuminating light or the erasing light is output by adjusting the intensity of the light output in the laser oscillation region. 8. The electro-developing recording medium comprises an electrostatic information recording medium on which electric charges are generated according to an image, and a visible image is generated according to the electric charges, and a charge holding device capable of holding the visible image. The erasing device for an electro-developing camera according to claim 1, further comprising a medium. 9. The liquid crystal display device using a memory type liquid crystal as the charge holding medium.
An erasing device for an electro-developing camera according to item 1.