JP2002135636A - Electronic camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic camera, in which the rise in the temperature inside the camera is suppressed. SOLUTION: The camera is provided with a temperature sensor 442 for detecting the temperature inside the camera. When the temperature detected by the sensor 442 exceeds a prescribed temperature, the temperature rise in the camera due to heating of a backlight 441 or that of a battery is prevented by turning off the light 441, stopping the focusing operation of a photographic optical system 2 by a lens-driving circuit 430 or turning off the power of the camera. As a result, the noise of a CCD 214 can be prevented from increasing and deterioration of the optical performance due to the thermal expansion of a lens barrel can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic camera for picking up a subject image using an image pickup device.

[0002]

2. Description of the Related Art An image pickup device of an electronic camera generally has
A CD (Charged Coupled Device) is used.
The CCD is one of photoelectric conversion devices that converts the intensity of light of an irradiated optical image into an electric signal corresponding to the intensity. The image signal output from the CCD is converted into a digital signal, subjected to image processing, and recorded on a recording medium (for example, a memory card) provided in the camera. Many electronic cameras have a liquid crystal monitor for displaying images, but the power consumption of a backlight provided in the liquid crystal monitor is quite large. Therefore, there is a tendency that the internal temperature of the camera tends to increase due to the heat generated by the backlight itself and the heat generated by the battery.

[0003]

However, when the temperature inside the camera increases, the noise of the CCD increases, and the image quality deteriorates due to the noise in night scene photography or the like. Further, when the outside air temperature is high, the temperature inside the camera may be extremely high, and the influence on the reliability cannot be ignored. Furthermore, if the temperature of the camera rises during use or if the temperature is high when replacing the memory card or the battery, the user has discomfort and is concerned that the camera may be abnormal.

An object of the present invention is to provide an electronic camera capable of suppressing an increase in the temperature inside the camera.

[0005]

An embodiment of the present invention will be described with reference to FIG. (1) The invention of claim 1 is applied to an electronic camera that captures a subject image with an imaging element 214 and displays an image based on an imaging signal output from the imaging element 214 by a liquid crystal display device 3 having a backlight 441. Temperature detecting means 442 for detecting the temperature inside the camera;
The control means 439 for turning off the backlight 441 when the temperature detected by the control unit 2 exceeds the predetermined temperature achieves the above object. (2) According to a second aspect of the present invention, a subject image formed by the photographing optical system 2 is picked up by the image pickup device 214 and the image pickup device 214
An image based on the imaging signal output from the backlight 4
A temperature detecting means 442 for detecting the temperature inside the camera, which is applied to the electronic camera for displaying the image on the liquid crystal display device 3 having the camera 41, Focusing device 430 for performing the image capturing and temperature detecting means 442 in the photographing mode
When the temperature detected by the camera exceeds the predetermined temperature, the backlight 441 is turned off and the image sensor 214
The above-described object is achieved by providing a control unit 439 for stopping the imaging operation by the camera and the focus adjustment operation by the focus adjustment device 430, respectively. (3) According to a third aspect of the present invention, a subject image formed by the photographing optical system 2 is picked up by the image pickup device 214, and the image pickup device 214
Image processing on the imaging signal output from the
24 is applied to an electronic camera for recording on the
In the photographing mode in which the photographing operation is performed, the focus adjusting device 430 that performs the focus adjusting operation of the photographing optical system 2, the temperature detecting unit 442 that detects the temperature inside the camera, and the temperature detecting unit 442 that is detected in the photographing mode. The above-mentioned object is achieved by providing a control unit 439 for stopping the focus adjustment operation by the focus adjustment device 430 when the temperature exceeds a predetermined temperature. (4) The invention of claim 4 is applied to an electronic camera that captures a subject image with the image sensor 214, performs image processing on an image signal output from the image sensor 214, and records the image signal on the recording medium 424. Temperature detecting means 44 for detecting temperature
2 and control means 439 for prohibiting power supply to the flash device 446 when the temperature detected by the temperature detection means 442 exceeds a predetermined temperature, thereby achieving the above object. (5) The invention according to claim 5 is applied to an electronic camera that captures a subject image with the image sensor 214, performs image processing on an image signal output from the image sensor 214, and records the image signal on the recording medium 424. Temperature detecting means 44 for detecting temperature
2 and control means 439 for turning off the power of the camera when the temperature detected by the temperature detection means 442 exceeds a predetermined temperature, thereby achieving the above object. (6) The invention according to claim 6 is applied to an electronic camera that captures a subject image with an image sensor 214, performs image processing on an image signal output from the image sensor 214, and records the image signal on a recording medium 424. A control unit 439 for changing the power consumption from a normal state to a low power consumption state after a predetermined time from the end of the input operation by 5, 6, and 12, a temperature detection unit 442 for detecting the temperature inside the camera, and a temperature detection unit 442 The above-mentioned object is achieved by providing a change unit 439 for shortening the predetermined time in accordance with the detected temperature. (7) The invention of claim 7 is applied to an electronic camera that captures a subject image with the image sensor 214, performs image processing on an image signal output from the image sensor 214, and records the image signal on the recording medium 424. Temperature detecting means 44 for detecting temperature
And control means for prohibiting the reproduction of the image signal from the recording medium and / or the recording to the recording medium 424 when the temperature detected by the temperature detecting means 442 during the imaging operation by the imaging element 214 exceeds a predetermined temperature. 439 to achieve the above object.

In the section of the means for solving the above problems, the drawings of the embodiments of the present invention are used to make the present invention easier to understand, but the present invention is not limited to the embodiments of the present invention. Not something.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1A and 1B are views showing an embodiment of an electronic camera according to the present invention, wherein FIG. 1A is a plan view of the electronic camera as viewed from above, and FIG. 1B is a rear view of the electronic camera as viewed from behind. As shown in FIG. 1A, on a top surface of the electronic camera 1, a main switch 4 for turning on / off a power, a release button 5, and a command dial 6 for switching between a recording mode and a reproduction mode. And a display panel 7 for displaying camera information. Here, the recording mode is a mode in which a subject image can be photographed and the image data thereof can be recorded, and the reproduction mode is a mode in which the recorded image data is read out and the liquid crystal display 3 (FIG. b)) is a mode for reproducing and displaying.

As shown in FIG. 1B, on the back of the camera, in addition to a liquid crystal display 3 for displaying an image, a finder eyepiece window 8 and a zoom switching button 9 for zooming the photographing optical system 2. And various operation buttons are provided. When the zoom switch button 9 is pressed on the W side, the photographing optical system 2 is driven to the wide-angle side, and when the T side is pressed, it is driven to the telephoto side. In the recording mode, C
The subject images picked up by the CD 214 are sequentially displayed on the liquid crystal display 3. In the reproduction mode, the liquid crystal display 3 performs thumbnail display of images stored in the recording medium 424 described later and reproduction display of individual images.

Reference numeral 10 denotes a menu button for displaying a setting menu on the liquid crystal display 3. When setting various settings, the setting menu is displayed and selection buttons 11a to 11a are displayed.
The item to be set is selected by 11d. For example, the electronic camera 1 is provided with a plurality of shooting modes that enable optimum shooting according to the shooting scene. When a shooting mode menu is displayed on the liquid crystal display 3, the shooting mode such as a night view mode, a portrait mode, or a landscape mode is displayed. The type is displayed. The setting of the exposure mode and the like are performed in the same manner. 1
Reference numeral 2 denotes a monitor on / off button for turning on / off the display of the liquid crystal display 3. Reference numeral 13 denotes a flash mode button for performing settings related to a flash device, for example, settings such as forced light emission and light emission inhibition.

FIG. 2 is a circuit block diagram of the electronic camera shown in FIG. 1. When the main switch 4 is turned on, the power of the electronic camera 1 is turned on.
The control program stored in M443 is activated. When the recording mode is set by the command dial 6, the electronic camera 1 can take a picture. On the other hand, when the reproduction mode is set, an image based on the image data recorded on the memory card 424 is reproduced and displayed on the display LCD 447. Can be. In the recording mode, the CCD 21
An image based on the image pickup signal from 4 is displayed on the liquid crystal display 3 of FIG. Reference numeral 441 denotes a backlight for illuminating the LCD 447, and the liquid crystal display 3 in FIG.
447 and a backlight 441.

The photographing optical system 2 includes a plurality of lenses 201 to 20.
4, a shutter plate 208 and a diaphragm 215 are provided between the lens 203 and the lens 204. The subject light incident on the photographing optical system 2 includes lenses 201 to 20
4. After passing through the shutter plate 208 and the diaphragm plate 215, C
An image is formed on the imaging surface of the CD 214. The aperture plate 215 and the shutter plate 208 are formed in a disk shape, and a step motor 415 provided at the center of rotation of the disk,
408. The diaphragm plate 215 is provided with a plurality of diaphragm openings having different opening areas, and the diaphragm plate 215 is rotated by a step motor 415 to arrange one arbitrary diaphragm opening on the optical axis.

The shutter plate 208 is provided with a complete light blocking portion for blocking all light beams passing through the lens 203 and an opening for passing all light beams. During exposure, the opening of the shutter plate 208 is positioned on the optical path. And the complete light-shielding portion is set on the optical path upon completion of the exposure. Reference numeral 453 denotes an aperture drive circuit for driving and controlling the step motor 415, and reference numeral 454 denotes a shutter drive circuit for driving and controlling the step motor 408. When shooting, first, the CCD 21
4 is discharged, and a predetermined opening of the diaphragm plate 215 is set on the optical path. CCD
When the light is exposed to the light 214 for a predetermined time, the electric charge is accumulated again. The time from the discharge of the electric charge until the light path is shielded again by the complete light shielding portion of the shutter plate 208 corresponds to the exposure time.

The focus adjustment operation of the photographing optical system 2 is performed by a lens drive circuit 430. This lens driving circuit 430
Is normally performed by a command from the CPU 439, but the focus adjustment operation can also be performed by an operation signal output when the distance ring 462 is manually operated.

When a subject image is formed on the imaging surface of the CCD 214, signal charges corresponding to the intensity of light of the subject image are accumulated. Digital signal processor for CCD 214
A horizontal drive signal is supplied from a DSP (hereinafter referred to as DSP) 433, and a vertical drive signal is supplied from a CCD drive circuit 434 controlled by the DSP 433. That is, the timing of the CCD 214 is controlled by the DSP 433 and the CCD drive circuit 434, and a signal from the CCD 214 is input to the image processing unit 431.

The image processing section 431 has a noise removing circuit, a DC reproducing circuit, and the like. The image processing section 431 performs analog processing such as noise removal and gain control on the image signal output from the CCD 214, and then performs analog / digital conversion. Circuit (hereinafter, referred to as an A / D conversion circuit) 432. The A / D conversion circuit 432 converts the image signal output from the image processing unit 431 into a digital signal, and outputs the converted image data to the DSP 433 described above.

In the DSP 433, an A / D conversion circuit 432
Is subjected to image processing such as contour compensation, gamma correction, and white balance adjustment.
The DSP 433 controls the data bus connected to the buffer memory 436 and the memory card 424 to temporarily store the image data subjected to various image processings in the buffer memory 436, and then store the image data in the buffer memory 436.
Image data is read from a predetermined compression format (for example, J
The data is compressed by the PEG method and recorded on the memory card 424.

The DSP 433 stores image data captured by the CCD 214 and subjected to the above-described image processing and image data read and expanded from the memory card 424 in the frame memory 435 and based on the image data. A display LCD 44 provided on the electronic camera 1 for displaying images
7 is displayed. Further, the DSP 433 also manages data input / output timing in recording the above-described image data on the memory card 424 and recording the decompressed photographed image data on the buffer memory 436.

A buffer memory 436 in which image data based on the output of the CCD 214 is temporarily stored is used to alleviate differences in the speed of input / output of image data to / from the memory card 424 and differences in processing speed in the CPU 439, the DSP 433, and the like. Used for The timer 445 has a built-in clock circuit, and stores time data corresponding to the current time as C
It is output to the PU 439 and is also used as a timer for monitor on / off control described later. This time data is stored in the memory card 42 together with the image data described above.
4 recorded.

The colorimetric element 417 detects the color temperature of the main subject and its surroundings, and outputs data of the detected color temperature to the colorimetric circuit 452. The color measurement circuit 452 includes a color measurement element 417.
A predetermined process is performed on the analog signal output from the CPU to convert it into a digital value, and the converted digital signal
Output to The interface 448 is a predetermined external device.
(Not shown) to transmit and receive data between the CPU 439 and the connected external device. Reference numeral 440 denotes a display circuit that controls the display panel 7 on which setting contents in the photographing operation are displayed. 442 is CC
This is a temperature sensor for detecting the temperature of D or its surroundings, for example, a thermistor. 449 is a charging circuit for the flash device 446;
When the flash photography is performed using, the charging by the charging circuit 449 is performed in preparation for the next flash photography.

<< Recording Mode >> Next, the operation in the recording mode will be described. When shooting with an electronic camera, the command dial 6 is set to the recording mode and the main switch 4 is turned on, or the command dial 6 is set to the recording mode after the main switch 4 is turned on. The image signal output from the CCD 214 is subjected to analog processing such as noise removal and gain control by an image processing unit 431, and then is converted to a digital signal by an A / D conversion circuit 432. The digitally converted signal is led to the above-mentioned DSP 433, where image pre-processing such as contour compensation and gamma correction is performed, and the buffer
36.

Thereafter, the CPU 439 and the buffer memory 4
The image data is exchanged with the image data 36 to obtain a white balance adjustment value from the image data, and the DSP 433 performs white balance adjustment based on the adjustment value. The image data after the white balance adjustment is stored in the buffer memory 436 again. The image data stored in the buffer memory 436 is displayed on the display
This is processed into image data to be displayed at 47. The processed image data is written to the frame memory 435,
LCD display as shooting monitor image called through image
447. This through image is sequentially updated at predetermined intervals based on subject light incident on the imaging optical system 2 by repeating the above operation.

When a half-press switch (not shown) is turned on by half-pressing the release button 5, the focus adjustment state of the photographing optical system 2 is detected based on the contrast of the image data. The focus adjustment operation by the lens drive circuit 430 is performed so that an image is formed on the top. When the release button 5 is half-pressed,
The CPU 439 detects the brightness of the subject from the image data, and performs an exposure calculation based on the detected brightness.

The electronic camera 1 has a mode called a "continuous AF mode" and a mode called a "single AF mode" as focus adjustment operations. In the continuous AF mode, the focus adjustment operation is repeatedly performed regardless of the operation of the release button 5, and the focus is locked by pressing the release button 5 halfway. On the other hand, in the single AF mode, the focus adjustment operation is performed only when the release button 5 is half-pressed, and the focus is locked.

When the release button 5 is fully pressed following the half-press of the release button 5, a full-press switch (not shown) is turned on. As a result, after the signal charges accumulated in the CCD 214 are once discharged, the shutter plate 208 and the aperture plate 215 are driven based on the result of the exposure calculation, and the CCD 214 performs imaging. At the time of this photographing, the exposure calculation result and the flash mode button 13
The flash device 446 may emit light depending on the setting according to (FIG. 1).

The image signal output from the CCD 214 by this imaging is subjected to the above-described series of processing and stored in the buffer memory 436. The image data stored in the buffer memory 436 is displayed on the display
After being processed into image data to be displayed on the 447, the image data is written into the frame memory 435, and a captured image called a freeze image is displayed on the display LCD 447. The image data on which such image preprocessing has been performed is further DS
The data is compressed by P433, a predetermined data name is given by the CPU 439, and the time information from the timer 445 is added to the recording medium such as a flash memory (PC).
Card, a CF card, etc.).

<< Reproduction Mode >> When the command dial 6 is used to switch to the reproduction mode, the memory card 42
4 is read and stored in the buffer memory 436. Normally, the memory card 42
4, the last recorded image data or the first recorded image data is read. Buffer memory 436
Is read by the CPU 439, processed by the DSP 433 into image data for display, and displayed on the display LCD 447 as a reproduced image. When no image data is recorded on the memory card 424, a message indicating that there is no image data is displayed on the display LCD 447.

When the selection button 11a or 11c shown in FIG. 1 is operated while an image is being reproduced on the display LCD 447, the image data of the previous frame is read from the memory card 424, and the reproduced image is displayed on the display LCD 447. You. On the other hand, when the selection button 11b or 11d is operated, the image data of the next frame is read and the reproduced image is displayed on the display LCD 447. As described above, the playback image is displayed on the display LCD 447 during the playback mode.
The subject image captured by the CCD 214 cannot be displayed as in the shooting mode. Further, in the reproduction mode, the focus adjustment operation and the exposure detection related to the photographing are not performed.

<< Measures to Reduce Camera Temperature >> As described above, in an electronic camera having the liquid crystal display 3,
The temperature inside the camera rises considerably due to the heat generated by the backlight 441 and the heat generated by the battery. In the present embodiment, when the temperature in the camera becomes equal to or higher than a predetermined temperature, the backlight 441
Is turned off to control the temperature rise.

FIG. 3 is a flowchart showing a control procedure of the electronic camera, which is started when the main switch 4 of the camera is turned on. In step S1, the liquid crystal display 3 is turned on. In step S2, the command dial 6
Is a step of determining whether the setting of the recording mode is the recording mode or the reproducing mode.
The process proceeds to step S7 if it is determined that the mode is the reproduction mode.

First, the case of the recording mode will be described. In step S3, it is determined whether the temperature T detected by the temperature sensor 442 is equal to or higher than a predetermined temperature T0. If the determination is YES, the process proceeds to step S4, and the heat generation prevention countermeasure processing A
Is executed. Although various forms can be considered as the heat generation prevention processing A, a typical one is as follows (A1)
To (A8). (A1) Turn off the liquid crystal display 3 (A2) Change AF from continuous AF to single AF
(A3) Stop the AF operation itself, that is, stop the power supply to the lens drive circuit 430. (A4) Stop the power supply to the CCD 214. Stop charging the main capacitor. (A6) Shorten the time until the camera enters the sleep state. (A7) Turn off the power of the camera. (A8) Prohibit writing of image data to the memory card 424.

When specifically applied, (A1)-
Any one of (A8) may be applied, or some of them may be applied in combination. Before executing these processes, a warning message may be displayed on the liquid crystal display 3 to notify the user that the temperature in the camera is high. Still further, only a warning message may be displayed to urge the user to turn off the liquid crystal display 3 or turn off the power. Specific application examples will be described later. To prevent battery consumption, general electronic cameras are equipped with a function that automatically switches to a low power consumption state when the camera is not operated for a certain period of time. Is called a sleep state. In the present embodiment, the above-mentioned fixed time is shortened. In the sleep state, most of the camera functions are stopped, and when the release button 5 is half-pressed or the monitor on / off button 12 is operated, the sleep state is released.

On the other hand, if NO is determined in the step S3, the normal state which is not low power consumption is set. That is, if the electronic camera is in the state where the low power consumption processing A is performed, the state is canceled, and if the electronic camera is not in the state where the low power consumption processing A is performed, the state is maintained. Step S6 is
This is a step of executing a photographing process by half-pressing operation and full-pressing operation of the release button 5, and if the photographing process is performed, the process returns to step S2.

Next, the case where the photographing mode is determined in step S2 and the process proceeds to step S7 will be described. In step S7, it is determined whether or not the temperature T detected by the temperature sensor 442 is equal to or higher than a predetermined temperature T0. If the determination is YES, the process proceeds to step S8, where the low power consumption processing B is executed, and the determination is NO. The process proceeds to step S9 to set the normal state. Specific examples of the low power consumption processing B include the following processing (B1) to (B3). Before executing these processes, a warning message may be displayed on the liquid crystal display 3 to notify the user that the temperature in the camera is high. (B1) Turn off the liquid crystal display 3 (B2) Shorten the time until the camera enters the sleep state. (B3) Prohibit reading of image data from the memory card 424. (A1) and (B1) Then display LCD
Although 447 and the backlight 441 are turned off, only the backlight 441 may be turned off.

Next, in the recording mode (A6)
The case where (A7) is applied will be described with reference to the flowchart of FIG. 4 and FIG. FIG. 5 is a diagram showing a relationship between the camera internal temperature T and a time t (called a sleep time) until the camera enters a sleep state. Here, the sleep time t is gradually reduced in accordance with the rise of the camera internal temperature T, and the power of the camera is turned off when the temperature becomes T2 or more. The flowchart of FIG. 4 is a rewrite of the procedure from step S3 to step S5 of the flowchart shown in FIG. 3 so as to correspond to FIG. 5, and steps S41 to S45 correspond to step S4 of FIG.
It corresponds to.

If it is determined in step S3 that the camera internal temperature T is equal to or higher than T0, the flow advances to step S41 to change the sleep time from the initial setting t0 to t1 (<t0). In step S42, it is determined whether or not the temperature T is equal to or higher than T1.
If determined to be ES, the process proceeds to step S43 to change the sleep time to t2 (<t1), and if determined to be NO, the process proceeds to step S6. In step S44, it is determined whether or not the temperature T is equal to or higher than T1, and if YES, step S45 is performed.
Then, the power of the camera is turned off, and if NO is determined, the process proceeds to step S6. On the other hand, from step S3 to step S
When the process proceeds to 4, the sleep time is set to the initial setting t0. As described above, by shortening the sleep time t and turning off the camera when the temperature T in the camera becomes T2, the rise in the temperature in the camera can be suppressed.

In the control according to the flowcharts shown in FIGS. 3 and 4, when the camera internal temperature T falls below T0, the camera automatically returns to the normal state (the sleep time t0 in FIG. 4).
A manual return may be performed without performing such automatic return. For example, in the reproduction mode, the monitor on / off button 12 is operated to return to the normal state.

A motor is used to drive the lens of the photographing optical system 2 shown in FIG. 2. At a low temperature, the rotation of the motor is slowed to drive the lens with a large torque. Therefore, a temperature sensor is provided in the lens barrel. In the case of such a camera, the above-described control (see FIGS. 3 and 4) may be performed using the temperature detected by the temperature sensor in the lens barrel, instead of providing the temperature sensor 442 in FIG. .

As shown in FIG. 3, in the electronic camera according to the present embodiment, when the camera internal temperature T becomes equal to or higher than the predetermined temperature T0, low power consumption processing is performed to thereby generate heat of the backlight 441 and heat of the battery. To prevent the temperature inside the camera from rising. As a result, a decrease in optical performance due to thermal expansion of the lens barrel and an increase in noise of the CCD 214 can be suppressed.

In the correspondence between the embodiment described above and the elements of the claims, the CCD 214 is used as an image pickup device,
The liquid crystal display 3 includes a liquid crystal display device and a temperature sensor 44.
2 is a temperature detecting means, CPU 439 is a controlling means and a changing means, a lens driving circuit 430 is a focusing device, a memory card 424 is a recording medium, a main switch 4, a release button 5, a command dial 6, a zoom switching button 9 , Menu button 10, selection buttons 11a-11
d, the monitor on / off button 12 and the flash mode button 13 each constitute an input operation unit.

[0040]

As described above, according to the present invention,
When the temperature inside the camera exceeds a predetermined temperature, the backlight is turned off, the focus adjustment operation is stopped, the power supply to the flash device is prohibited, the camera power is turned off, and the reproduction and / or reproduction of the image pickup signal from the recording medium are performed. Alternatively, heat generation of the backlight and heat generation of the battery can be reduced by prohibiting recording on the recording medium or shortening a predetermined time until the state changes from the normal state to the low power consumption state. As a result, an increase in the temperature inside the camera is suppressed, and adverse effects associated with the temperature increase, such as an increase in noise included in the output of the image sensor, can be prevented.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of an electronic camera according to the present invention, wherein (a) is a plan view of the electronic camera and (b) is a rear view.

FIG. 2 is a circuit block diagram of the electronic camera shown in FIG.

FIG. 3 is a flowchart illustrating a procedure of a temperature reduction measure.

FIG. 4 is a flowchart showing specific processing of steps S4 and S5 of the flowchart of FIG.

FIG. 5 is a diagram illustrating an example of a relationship between a camera internal temperature T and a sleep time t.

[Explanation of symbols]

 Reference Signs List 1 electronic camera 2 photographing optical system 3 liquid crystal display 4 main switch 5 release button 6 command dial 9 zoom switching button 10 menu button 12 monitor on / off button 208 shutter plate 214 CCD 215 aperture plate 424 memory card 439 CPU 441 LCD backlight 442 temperature Sensor 446 Flash device 447 Display LCD 449 Charging circuit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 101: 00 H04N 101: 00

Claims (7)

[Claims] 1. An electronic camera that captures a subject image with an image sensor and displays an image based on an image signal output from the image sensor on a liquid crystal display device having a backlight. An electronic camera, comprising: a control unit that turns off the backlight when a temperature detected by the temperature detection unit exceeds a predetermined temperature. 2. An electronic camera in which a subject image formed by a photographing optical system is captured by an image sensor, and an image based on an image signal output from the image sensor is displayed by a liquid crystal display device having a backlight. Temperature detection means for detecting an internal temperature; a focus adjustment device for performing a focus adjustment operation of the imaging optical system in a shooting mode in which an imaging operation is performed by the imaging element; and a focus adjustment device which is detected by the temperature detection means in the shooting mode. An electronic camera, comprising: control means for turning off the backlight when the temperature exceeds a predetermined temperature, and stopping the imaging operation by the imaging device and the focus adjustment operation by the focus adjustment device. . 3. An electronic camera which images a subject image formed by a shooting optical system with an image sensor, performs image processing on an image signal output from the image sensor, and records the image signal on a recording medium. A focus adjustment device that performs a focus adjustment operation of the imaging optical system in a shooting mode in which an imaging operation is performed; a temperature detection unit that detects a temperature inside the camera; and a temperature detected by the temperature detection unit in the shooting mode. An electronic camera, comprising: control means for stopping a focus adjustment operation by the focus adjustment device when the temperature exceeds a predetermined temperature. 4. An electronic camera that captures a subject image with an image sensor, performs image processing on an image signal output from the image sensor, and records the image signal on a recording medium. An electronic camera, comprising: control means for prohibiting power supply to the flash device when the temperature detected by the temperature detection means exceeds a predetermined temperature. 5. An electronic camera which captures a subject image with an image sensor, performs image processing on an image signal output from the image sensor, and records the image signal on a recording medium, comprising: a temperature detector for detecting a temperature inside the camera; An electronic camera, comprising: control means for turning off the power of the camera when the temperature detected by the temperature detection means exceeds a predetermined temperature. 6. An electronic camera which captures a subject image with an image sensor, performs image processing on an image signal output from the image sensor, and records the image signal on a recording medium. Control means for changing the consumption from the normal state to the low power consumption state; temperature detection means for detecting the temperature inside the camera; and changing means for shortening the predetermined time according to the temperature detected by the temperature detection means. An electronic camera comprising: 7. An electronic camera that captures a subject image with an image sensor, performs image processing on an image signal output from the image sensor, and records the image signal on a recording medium, wherein a temperature detector detects a temperature inside the camera. Control means for prohibiting reproduction of the imaging signal from the recording medium and / or recording on the recording medium when a temperature detected by the temperature detection means exceeds a predetermined temperature during an imaging operation by the imaging element; An electronic camera comprising: