JP2007158664A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus capable of suppressing the heat generation at a photographing element, with a configuration in which the photographing element is supported in a rocking enable or movable fashion by a hand blurring correction mechanism and a zooming mechanism. <P>SOLUTION: The imaging apparatus comprises a photographing element, a driving means for driving the photographing element, a rocking means for rocking the photographing element or a moving means for moving the photographing element, and a temperature sensor for detecting temperature of the photographing element. In addition, the apparatus comprises a control means for stopping driving of the photographing element by the driving means and starting rocking of the photographing element by the rocking means, or a control means for stopping driving of the photographing element by the driving means and starting moving of the photographing element by the moving means, when temperature detected by the temperature sensor exceeds a reference temperature established beforehand during driving of the photographing element. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an imaging apparatus, and more particularly to an imaging apparatus that efficiently suppresses heat generation of an imaging element.

  2. Description of the Related Art In recent years, imaging devices such as digital cameras and digital video cameras are required to have high-resolution and high-definition performance of image pickup devices typified by CCD (Charge Coupled Device) as multi-functionality and high image quality progress. As a result, higher pixels and higher density are accelerating.

  On the other hand, an image sensor with a high pixel density can handle high speed drive by increasing the frequency of the drive signal. However, since the power consumption increases as the drive signal speed increases, The temperature increases and the temperature rises greatly. The increase in temperature increases noise such as dark noise, and causes a decrease in the S / N ratio (Signal / Noise) of the image signal. The reduction in the S / N ratio has a great influence on the image reproducibility and the image quality. Therefore, it is necessary to suppress heat generation in order to realize high-quality image formation. In the field of imaging devices, various techniques for suppressing heat generation of the imaging element have been studied.

For example, in a video camera, a technique has been disclosed in which a heat transfer member is interposed between an exterior case and an image sensor to release heat generated in the image sensor to the exterior case and suppress a temperature rise of the image sensor. (For example, refer to Patent Document 1).
JP 2005-64146 A

  By the way, in recent years, as the performance of imaging devices has advanced, imaging devices having a camera shake correction function have appeared.

  In camera shake correction, when the camera shakes with respect to the subject due to camera shake during shooting, for example, the optical axis of the optical system is deflected to cancel the movement of the imaging position of the subject optical image relative to the camera. This suppresses the shake. Various methods have been studied for the camera shake correction mechanism.

  For example, the entire imaging optical unit consisting of an optical system and imaging device is swung in accordance with the camera body shake, so that the image pickup optical unit can be moved in such a way as to suppress image shake. There is an image pickup device swinging method or the like that suppresses image shake by swinging the image pickup device attached to the camera according to the shake of the camera body. As described above, various image stabilization methods have been proposed in which the entire imaging optical unit including the imaging element or a configuration in which the imaging element is supported so as to be capable of sliding is proposed.

  The technique disclosed in Patent Document 1 described above can efficiently dissipate heat with a simple configuration when the imaging element is fixed and installed at a fixed position with respect to the exterior case. However, in an image pickup apparatus using a camera shake correction method in which the image pickup device is supported to be movable or a zoom mechanism in which the image pickup device is supported to be movable, the image pickup device is a movable part. Such a configuration using a heat transfer member is considered difficult.

  The present invention has been made in view of the above problems, and in an imaging apparatus having a configuration in which an imaging element is supported to be movable or movable by a camera shake correction mechanism or a zoom mechanism, the complexity of the apparatus is increased due to an increase in the number of parts. An object of the present invention is to provide an image pickup apparatus that can suppress heat generation of the image pickup element without increasing the cost or increasing the price. Specifically, when the temperature of the image sensor rises, the image sensor comes into contact with the surrounding air by moving or moving the image sensor by performing a camera shake correction operation or a zoom operation. Provided is an imaging device capable of suppressing heat generation of an imaging element by stirring.

  The above object is achieved by the invention described in any one of 1 to 4 below.

1. An image sensor that photoelectrically converts a subject optical image to generate an image signal;
Driving means for driving the image sensor;
Oscillating means for oscillating the image sensor, or moving means for moving the image sensor;
In an imaging device comprising: a temperature sensor that detects a temperature of the imaging element;
When the temperature detected by the temperature sensor during driving of the image sensor exceeds a preset reference temperature, driving of the image sensor by the drive unit is stopped, and the image sensor by the swing unit is stopped. An imaging apparatus comprising: control means for starting swinging; or control means for stopping driving of the imaging element by the driving means and starting movement of the imaging element by the moving means.

2. A display means for displaying images and shooting information is provided.
2. The imaging apparatus according to 1 above, further comprising a control unit that displays warning information on the display unit when a temperature detected by the temperature sensor exceeds a preset reference temperature.

  3. 3. The imaging apparatus according to claim 1 or 2, wherein the swinging means is a component part of a camera shake correction mechanism that performs camera shake correction by swinging the image sensor in response to shaking of the imaging apparatus body.

  4). The moving means moves a zoom optical system having a movable lens group, and the imaging element is supported so as to be movable integrally with the movable lens group. 2. The imaging device according to 2.

  According to the present invention, in an imaging device having a configuration in which the imaging device is supported so as to be movable or movable, when the temperature of the imaging device rises while driving the imaging device, the driving of the imaging device is stopped and imaging is performed. The element was moved or moved. Therefore, heat generation of the image sensor can be suppressed by bringing the image sensor into contact with the surrounding air and stirring the air.

  In addition, the existing image stabilization mechanism and zoom mechanism are used to radiate heat from the image sensor, so the heat generated by the image sensor does not increase the complexity and cost of the device due to the addition of new parts. Can be suppressed.

  In addition, when the heat radiation operation of the image sensor starts, a warning is displayed on the display means. Therefore, during photographing, the image disappears unintentionally, and it can be recognized that there is no malfunction even if a camera shake operation is started, and the state of the imaging apparatus can be accurately grasped.

  Embodiments of an imaging apparatus according to the present invention will be described below with reference to the drawings. In addition, in each figure, the same code | symbol shows the same or an equivalent part, and the overlapping description is abbreviate | omitted.

  As a specific embodiment of the imaging apparatus according to the present invention, a digital camera is typical, but a mobile phone with a camera, a digital video camera, and the like are also included.

Embodiment 1
First, the external appearance of a digital camera 1 that is one of representative embodiments of an imaging apparatus according to the present invention will be described with reference to FIG.

  FIG. 1A is a perspective view of a digital camera 1 according to the present invention as viewed from an oblique front, and FIG. 1B is a perspective view as viewed from an oblique rear.

  The digital camera 1 is a substantially rectangular parallelepiped and has a thin housing 10 in the direction of the optical axis (hereinafter referred to as the front-rear direction) of light that enters the imaging device from a subject. A grip portion 106 that is thicker in the front-rear direction than other portions is formed in a part of the housing 10 in order to hold the digital camera 1.

  The digital camera 1 has an LCD monitor 107 composed of an LCD (Liquid Crystal Display), an optical viewfinder 108, and an external connection terminal for connecting the digital camera 1 to a personal computer (not shown). The image signal captured by the area sensor 251 (hereinafter abbreviated as the CCD 251) is subjected to predetermined signal processing, and a live view display of the photographing standby image on the LCD monitor 107 and a recording medium such as a memory card 177 described later are performed. Processing such as image recording, reproduction display of the recorded image on the LCD monitor 107, or transfer of the image to a personal computer is performed.

  As shown in FIG. 1A, a shutter button 101 and a power button 102 are provided on the upper surface of the digital camera 1. The shutter button 101 has a two-stage push stroke. AF (Auto Focus) control and AE (Auto Exposure) control are activated by “half-pressing” to lock AF and AE. Is done. Further, shooting (shooting for recording) is performed in a state of “full press” in which the “half press” is further pressed.

  A flash 103, a finder objective window 105, and a photographic lens window 104 are provided on the front of the digital camera 1. Inside the photographing lens window 104, an imaging optical unit 2 including a bending optical system 20 described later, an aperture / shutter 253, and the like are provided.

  As shown in FIG. 1B, an optical viewfinder 108 for visually recognizing a subject optical image is provided on the upper back of the digital camera 1. In addition, an LCD monitor 107 that performs live view display of a shooting standby image, playback display of a recorded image, various information display, and the like is provided at the center of the back of the digital camera 1. Further, a jog dial (cross key) 109 for performing various settings is provided in the vicinity of the LCD monitor 107. The jog dial (cross key) 109 also serves as a zoom operation button. A selector switch 110 for switching the operation mode of the digital camera 1 is provided in the vicinity of the LCD monitor 107. The operation mode of the digital camera 1 includes, for example, a still image shooting mode, a moving image shooting mode, and a playback mode. Various mode button groups 111 are provided in the vicinity of the LCD monitor 107. The mode buttons 111a to 111d include a camera shake correction ON / OFF button 111d.

  Next, the control system of the digital camera 1 will be described with reference to FIG. FIG. 2 is a circuit block diagram of the digital camera 1 according to the present invention.

  The aperture / shutter 253, the focus / zoom motor 254, and the imaging optical unit drive motors 255a and 255b are described later via the aperture / shutter drive circuit 157, the focus / zoom motor drive circuit 158, and the imaging optical unit drive motor drive circuit 159, respectively. The camera operates in accordance with a control signal sent from the camera control CPU 181.

  The CCD 251 corresponds to the image sensor in the present invention, and is a color area in which each color transmission filter of R (red) light, G (green) light, and B (blue) light is arranged in a checkered pattern in pixel units (pixel units). An object light image formed by the bending optical system 20 by an imaging sensor is converted into an image signal of each color component of R (red) light, G (green) light, and B (blue) light (pixels received in units of pixels). The signal is converted into a signal comprising a signal train of signals).

  The timing generator 156 generates a drive control signal for the CCD 251 based on a reference clock transmitted from a reference clock generator 171 described later. The drive control signal generated by the timing generator 156 includes, for example, an integration start / end timing signal for controlling the exposure start and end timings in the CCD 251, and a readout control signal (horizontal synchronization signal, vertical synchronization) of the light reception signal of each pixel. Clock signals such as signals, transfer signals, and the like. When these clock signals are supplied to the CCD 251, the CCD 251 performs drive control corresponding to each clock signal. The operation of the timing generator 156 is controlled by a camera control CPU 181 described later. As described above, the timing generator 156 and the camera control CPU 181 function as driving means in the imaging apparatus according to the present invention.

  The signal processing circuit 152 includes a CDS circuit 153 and an AGC circuit 154, and a predetermined process is performed on the image signal via these components. Hereinafter, the predetermined processing for the image signal performed by the signal processing circuit 152 will be described.

  A CDS (Correlated Double Sampling) circuit 153 reduces noise generated during reading from the image signal read from the CCD 251 and corrects dark noise by OB clamping operation.

  An AGC (automatic gain control) circuit 154 adjusts the gain of the image signal processed by the CDS circuit 153.

  As described above, the signal processing circuit 152 performs analog signal processing on the image signal read from the CCD 251.

  The A / D converter 155 converts each pixel signal constituting the image signal input from the AGC circuit 154 into a digital signal. The A / D converter 155 converts each pixel signal of an analog signal into, for example, a 14-bit digital signal based on the A / D conversion clock input from the reference clock generation unit 171.

  In this manner, the image signal read out by the CCD 251 is subjected to predetermined processing by the signal processing circuit 152 and the A / D converter 155 and converted into a digital image signal. The digitized image signal is captured by the image processing CPU 161 and subjected to predetermined processing.

  The image processing CPU 161 is composed of a microcomputer and comprehensively controls image signal processing operations performed by the digital camera 1. In the following, processing for a digital image signal performed by the image processing CPU 161 will be described.

  First, the image signal captured by the image processing CPU 161 is written into the image memory 175 in synchronization with the reading of the image signal output from the CCD 251. That is, a digital image signal used for processing performed by the image processing CPU 161 is once recorded in the image memory 175, taken out from the image memory 175, and used for processing in each block.

  As shown in FIG. 2, the image processing CPU 261 includes, for example, a black level correction unit 163, a pixel interpolation unit 164, a resolution conversion unit 165, a white balance control unit 166, a gamma correction unit 167, a matrix calculation unit 168, a shading correction unit 169, The image processing unit 162 includes an image compression unit 170 and the like, a reference clock generation unit 171, and the like. The image processing unit 162 performs known image signal processing on the digital image signal extracted from the image memory 175. Then, the digital image signal that has undergone predetermined processing at these parts is stored in the image memory 175 again.

  The reference clock generation unit 171 is a circuit that generates a reference clock used for driving control of the digital camera 1 and supplies the reference clock to each circuit. Specific examples of the reference clock in the present invention include a reference clock used for the timing generator 156, an A / D conversion clock used for the A / D converter 155, and the like. Generate a clock.

  Next, the LCD monitor 107 corresponds to the display means in the present invention, and performs live view display of a shooting standby image captured by the CCD 251, playback display of a recorded image, various information displays, and the like. The operation of the LCD monitor 107 is controlled by a later-described camera control CPU 181 corresponding to the control means in the present invention.

  The LCD drive circuit 183 includes a buffer memory (VRAM) that temporarily stores an image signal read from the image memory 175 by the image processing CPU 161, and displays the image signal on the LCD monitor 107 as a field image.

  Next, the gyro 185 is an angular velocity sensor that detects shaking of the digital camera 1, detects a shaking angular velocity signal when the digital camera 1 rotates due to shaking, and sends the detected signal to a camera control CPU 181 described later. .

  The temperature sensor 252 is, for example, a thermistor, detects the temperature of the CCD 251, and sends the detected temperature to a camera control CPU 181 described later.

  Next, the camera control CPU 181 is composed of a microcomputer, and based on each switch operation of a switch group 191 to be described later, the driving of each member constituting the digital camera 1 is sequentially controlled to comprehensively control the photographing operation of the digital camera 1. To do.

  Further, the camera control CPU 181 drives the imaging optical unit drive motors 255a and 255b based on the angular velocity signal detected by the gyro 185, and controls the camera shake correction operation by swinging the imaging optical unit 2 described later.

  The camera control CPU 181 controls the timing generator 156 to drive the CCD 251 based on the temperature of the CCD 251 detected by the temperature sensor 252, and controls the imaging optical unit drive motors 255a and 255b to perform imaging described later. The heat radiation operation of the CCD 251 is controlled by swinging the optical unit 2 or the like. Details of the heat radiation operation performed in the digital camera 1 will be described later.

  As described above, the camera control CPU 181, the imaging optical unit drive motors 255 a and 255 b, and the gyro 185 function as a swinging unit in the imaging apparatus according to the present invention. The camera control CPU 181 functions as a control unit in the imaging apparatus according to the present invention. Note that the camera shake correction according to the first embodiment of the present invention uses the imaging optical unit swinging method, and the camera shake correction operation conforms to, for example, the technique used in the Konica Minolta digital camera “Diimage X1”. .

  The camera control CPU 181 controls the operation of the focus / zoom motor drive circuit 158 based on the zoom operation signal from the jog dial (cross key) 108 and drives the focus / zoom motor 254 to zoom the bending optical system 20. Perform the action.

  The camera control CPU 181 performs AF control of the digital camera 1. Specifically, the camera control CPU 181 reads image data related to a distance measurement area on the imaging surface set in advance from data written in the image memory 175, and determines a focus position by detecting contrast of the read image data. The distance measurement calculation to be obtained is performed, and the operation of the focus / zoom motor drive circuit 158 is controlled based on the result, and the focus / zoom motor 254 is driven to perform AF control.

  The camera control CPU 181 performs AE control of the digital camera 1. Specifically, the camera control CPU 181 reads out image data relating to a preset photometry area on the imaging surface from data written in the image memory 175, and based on the read image data of the photometry area, the timing generator 156, the AGC circuit 154 and the aperture / shutter drive circuit 159 are controlled to perform AE control in the digital camera 1.

  As described above, in the digital camera 1, the image processing CPU 161 performs the above-described signal processing on the image signal captured from the CCD 251, and records the image signal subjected to these processing in the image memory 175. .

  The digital camera 1 according to the present invention records an image signal captured by the CCD 251 in the image memory 175 or displays it on the LCD monitor 107 under a mode set by various operation switches of the switch group 191.

  In the shooting standby state, image signals are taken into the image processing CPU 161 from the CCD 251 via the signal processing circuit 152 and the A / D converter 155 at predetermined intervals such as every 1/30 seconds. As described above, the captured image signal is subjected to predetermined signal processing at a portion from the black level correction unit 163 to the shading correction unit 169 of the image processing unit 162 in the image processing CPU 161, and then as a digital image signal. Recorded in the image memory 175. Then, the image signal recorded in the image memory 175 is read, and the live image is displayed on the LCD monitor 107 by using the read image signal as a field image via the LCD drive circuit 183.

  Further, at the time of image recording, the image signal is compressed by the image compression unit 170 of the image processing unit 162 in the image processing CPU 161 in order to obtain an image of the set recording resolution, and the obtained compressed image is stored in the memory card driver 176. To the memory card 177.

  At the time of reproduction, the image signal read from the memory card 177 is subjected to predetermined signal processing by the image processing CPU 161 and displayed on the LCD monitor 107 via the LCD driving circuit 183.

  2 are switches corresponding to the shutter button 101, the power button 102, the jog dial key (cross key) 109, the selector switch 110, the mode button group 111, and the like in FIG.

  Here, details of the imaging optical unit 2 will be described with reference to FIG. FIG. 3 is an exploded perspective view of a main part of the imaging optical unit 2.

  As shown in FIG. 2, the imaging optical unit 2 includes a bending optical system 20, a CCD 251, a flexible substrate 261, a heat radiation sheet 262, a temperature sensor 252 and the like.

  The bending optical system 20 forms an object optical image on the CCD 251 by bending an optical path of light from the object.

  The CCD 251 is a QFP (Quad Flat Package) type package having no lead terminal, for example, and is mounted on the flexible substrate 261 and mounted on the rear end of the bending optical system 20.

  Further, the heat dissipation sheet 262 is made of, for example, a highly heat-conductive sheet material such as copper, and is in close contact with the surface of the flexible substrate 261 opposite to the surface on which the CCD 251 is mounted. It is arranged to cover the whole.

  The temperature sensor 252 is provided in the vicinity of the CCD 251 on the flexible substrate 261.

  Here, the detail of the bending optical system 20 is demonstrated using FIG. FIG. 4 is a top cross-sectional view of the bending optical system 20.

  The bending optical system 20 includes a prism 21 that reflects light from a subject and bends its optical axis substantially vertically, a zoom optical system 22, and an objective lens 23. The prism 21 is disposed so as to face the photographing lens window 104 and bend the optical axis to the left (the direction in which the CCD 251 is located). As the prism 21, a right angle prism having a reflective film on the slope is used. However, the optical member is not limited to the prism, and other optical elements that can bend the optical axis, such as a simple mirror, may be used as the bending member. The objective lens 21 is disposed between the photographing lens window 104 and the prism 21.

  The zoom optical system 22 is disposed between the prism 21 and the CCD 251. The optical axis of the zoom optical system 22 passes through the center of the reflecting surface of the prism 21, forms an angle of 45 ° with the reflecting surface, passes through the center of the CCD 251, and is orthogonal to the CCD 251.

  The zoom optical system 22 includes a zoom lens group 24 for changing the photographing magnification and a focus lens group 25 for adjusting the focus. The zoom lens group 24 includes lenses 24 a and 24 b movable in the optical axis direction of the zoom optical system 22 and fixed lenses 24 c and 24 d. The focus lens group 25 is movable in the optical axis direction of the zoom optical system 22.

  In this way, the movable lenses 24a and 24b of the zoom optical system 22 move not in the front-rear direction of the digital camera 1, but in a direction perpendicular thereto, so that the bending optical system 20 is thin in the front-rear direction, and imaging is performed. It is suitable for reducing the thickness of the device.

  Next, the arrangement of the imaging optical unit 2 having such a configuration inside the housing 10 will be described with reference to FIG. FIG. 5 is a schematic diagram showing the arrangement of the imaging optical unit 2 inside the housing 10.

  As shown in FIG. 5, the objective lens 23 of the imaging optical unit 2 faces the photographing lens window 104, and the part A portion where the CCD 251 of the imaging optical unit 2 is mounted is positioned in the space inside the grip unit 106. The imaging optical unit 2 is arranged in the left-right direction inside the housing 10.

  During the camera shake correction operation, the A part of the imaging optical unit 2 swings around the pivot 210 (fulcrum) provided in the vicinity of the prism 21. Specifically, imaging optical unit drive motors 255a and 255b are provided on a base plate (not shown) provided inside the housing 10 with a pivot 210 interposed therebetween. Further, guide plates 256a and 256b are provided on the upper surface of the imaging optical unit 2 so as to face the imaging optical unit drive motors 255a and 255b. When the imaging optical unit drive motors 255a and 255b rotate in the same direction at the time of the camera shake correction operation, for example, the imaging optical unit 2 is configured by pressing or attracting the guide plates 256a and 256b facing the motor shafts. As shown in FIG. 5, the A portion of the digital camera 1 swings so as to draw an arc in the vertical direction Hy of the digital camera 1. On the other hand, when the imaging optical unit drive motors 255a and 255b rotate in different directions, each motor shaft pushes one of the guide plates 256a and 256b facing each other, and attracts the other, whereby the imaging optical unit 2 As shown in FIG. 5, the A part swings so as to draw an arc in the front-rear direction Hx of the digital camera 1. In this way, the camera shake correction is performed by swinging the part A portion where the CCD 251 of the imaging optical unit 2 is mounted with the pivot 210 as the swing center when the digital camera 1 is shaken with respect to the subject due to camera shake or the like during photographing. By canceling the movement of the imaging position of the subject optical image with respect to the digital camera 1, image blur is suppressed.

  According to the present invention, in the digital camera 1 having such a configuration, when the temperature of the image pickup device rises, the drive of the image pickup device is stopped and the image pickup device is swung using the above-described camera shake correction mechanism. Therefore, heat generation of the image sensor can be suppressed by bringing the image sensor into contact with the surrounding air and stirring the air.

  Here, the flow of the heat radiation operation of the CCD 251 performed in the digital camera 1 according to the present invention will be described in detail with reference to the flowchart shown in FIG.

  When the digital camera 1 is first set to, for example, a still image shooting mode, a shooting standby image is displayed on the LCD monitor 107 (step S1). Next, the temperature sensor 252 measures the temperature of the CCD 251 and the camera control CPU 181 acquires the temperature information measured by the temperature sensor 252 (step S2). The camera control CPU 181 compares the temperature of the CCD 251 acquired from the temperature sensor 252 with a preset reference temperature, and if the temperature of the CCD 251 exceeds the reference temperature (step S3; Yes), the LCD monitor A warning is displayed at 107 and the timing generator 156 is controlled to stop the driving of the CCD 251. Further, the photographing operation by the shutter button 101 is prohibited (step S4). On the other hand, if the temperature of the CCD 251 is lower than the reference temperature in step S3 (step S3; No), the process returns to step S2 and the temperature measurement of the CCD 251 is continued.

  Next, the camera control CPU 181 controls the image pickup optical unit drive motor drive circuit 159 to drive the image pickup optical unit drive motors 255a and 255b in order to cool the CCD 251, thereby swinging the image pickup optical unit 2 (step). S5). Then, when a preset time has elapsed (step S6; Yes), the camera control CPU 181 compares the temperature of the CCD 251 acquired again from the temperature sensor 252 with a preset reference temperature ( Step S7), it is determined whether or not the CCD 251 is cooled to a temperature lower than the reference temperature (Step S8). If the temperature of the CCD 251 falls below the reference temperature (step S8; Yes), the camera control CPU 1811 confirms the shooting operation mode, and if the still image shooting mode is continuously set (step S9; NO). Returning to step S1, the driving of the CCD 251 is restarted, and the display of the shooting standby image is restarted on the LCD monitor 107. On the other hand, if the temperature of the CCD 251 continues to exceed the reference temperature in step S8 (step S8; No), a warning is displayed on the LCD monitor 107, and then the main power supply of the digital camera 1 is turned off (step S10). ), Prohibit shooting.

  As described above, in the present invention, in the image pickup apparatus having a configuration in which the image pickup device is slidably supported by the camera shake correction mechanism, when the temperature of the image pickup device rises while the image pickup device is being driven, the image pickup device is driven. Stopped and moved the image sensor. Therefore, heat generation of the image sensor can be suppressed by bringing the image sensor into contact with the surrounding air and stirring the air.

  In addition, since the image sensor is radiated by using an existing camera shake correction mechanism, heat generation of the image sensor is suppressed without increasing the complexity and cost of the apparatus due to the addition of new parts. be able to.

[Embodiment 2]
Next, a second embodiment of the imaging device according to the present invention will be described. The configuration of the main part is substantially the same as that of the above-described first embodiment, and thus detailed description thereof is omitted. An imaging optical unit 2 having a configuration different from that of the first embodiment will be described with reference to FIG. 6A is an exploded perspective view of the main part of the imaging optical unit 2, and FIG. 6B is a schematic diagram showing the arrangement of the imaging optical unit 2 inside the housing 10. As shown in FIG.

  The digital camera according to the first embodiment uses an image pickup optical unit swing type camera shake correction mechanism, but the second embodiment includes an image sensor swing type camera shake correction mechanism. Note that the shake correction operation of the image pickup device swinging method is in accordance with, for example, the technique used in the Konica Minolta digital camera “Dimage Z1”.

  As shown in FIG. 6A, the imaging optical unit 2 includes a bending optical system 20, a CCD 251, a printed circuit board 271, actuators 272a, 272b, and the like.

  The bending optical system 20 forms a subject optical image on the CCD 251 by bending the optical axis of light from the subject.

  The CCD 251 is a DIP (Dual In Package) type package having a lead terminal, for example, and is mounted on the printed circuit board 271 and mounted on the rear end of the bending optical system 20.

  The actuators 272a and 272b are, for example, stacked piezoelectric elements, and swing the printed circuit board 271 on which the CCD 251 is mounted in the Hx direction and the Hy direction, respectively, during a camera shake correction operation.

  Next, the arrangement of the imaging optical unit 2 having such a configuration inside the housing 10 will be described.

  6B, the objective lens 23 of the imaging optical unit 2 faces the shooting lens window 104, and the printed circuit board 271 on which the CCD 251 of the imaging optical unit 2 is mounted is positioned in the space inside the grip unit 106. As shown in FIG. As described above, the imaging optical unit 2 is disposed in the left-right direction inside the housing 10.

  During the camera shake correction operation, the printed circuit board 271 on which the CCD 251 of the imaging optical unit 2 is mounted swings in the front-rear direction Hx and the vertical direction Hy of the digital camera 1 as shown in FIG.

  In this way, in the camera shake correction, when the digital camera 1 is shaken with respect to the subject due to camera shake or the like at the time of shooting, the printed circuit board 271 on which the CCD 251 of the imaging optical unit 2 is slid to swing the subject optical image with respect to the digital camera 1. By canceling out the movement of the image forming position, image blur is suppressed.

  According to the present invention, in the digital camera 1 having such a configuration, when the temperature of the image sensor rises as in the case of the first embodiment, the image sensor is swung. Therefore, heat generation of the image sensor can be suppressed by bringing the image sensor into contact with the surrounding air and stirring the air.

[Embodiment 3]
Next, a third embodiment of the imaging device according to the present invention will be described. The configuration of the main part is substantially the same as that of the first embodiment described above, and thus detailed description thereof will be omitted. An imaging optical unit 2 having a configuration different from that of the first embodiment will be described with reference to FIG. FIG. 7 is a view showing a part of a front cross section of the digital camera 1.

  At the right front end of the digital camera 1, as shown in FIG. 7, an imaging optical unit 2 is arranged in the vertical direction.

  As shown in FIG. 7, the imaging optical unit 2 includes a bending optical system 20, a CCD 251, a second group drive motor 292, a rear group drive motor 291 and the like.

  The bending optical system 20 forms a subject optical image on the CCD 251 by bending the optical axis of light from the subject.

  The CCD 251 is, for example, a DIP (Dual In Package) type package having a lead terminal. The CCD 251 is mounted on a printed board 271 and is incorporated in a zoom optical system 22 described later (third group 283, fourth group 284, 5). Group 285) and is supported so as to be movable, and is attached to the rear end of the bending optical system 20.

  The second group drive motor 292 drives the second group. Further, the rear group drive motor 291 is a CCD 251 integrated with a movable lens group (hereinafter referred to as a rear group) composed of a third group 283, a fourth group 284, and a fifth group 285 built in the zoom optical system 22. Is moved in the Hy direction. The second group drive motor 292 and the rear group drive motor 291 are controlled by the camera control CPU 181. As described above, the camera control CPU 181 and the rear group drive motor 291 function as moving means in the image pickup apparatus according to the present invention.

  Next, the arrangement of the imaging optical unit 2 having such a configuration inside the housing 10 will be described.

  As shown in FIG. 7, imaging is performed so that the objective lens 23 of the imaging optical unit 2 faces the imaging lens window 104 and the printed circuit board 271 on which the CCD 251 of the imaging optical unit 2 is mounted is positioned below the digital camera 1. The optical unit 2 is arranged in the vertical direction inside the housing 10.

  Further, a heat dissipating slit 115 is provided on the side surface of the housing 10 located in the vicinity of the CCD 251 as shown in FIG.

  During the zooming operation, the printed circuit board 271 on which the CCD 251 of the imaging optical unit 2 is mounted moves in the vertical direction Hy of the digital camera 1 as shown in FIG.

  According to the present invention, in the digital camera 1 having such a configuration, when the temperature of the image sensor rises, a zoom operation is performed to move the image sensor. Therefore, heat generation of the image sensor can be suppressed by bringing the image sensor into contact with the surrounding air and stirring the air.

  The present invention has been described above with reference to the embodiments. However, the present invention should not be construed as being limited to the above-described embodiments, and can be changed or improved as appropriate. For example, in the digital camera 1 described in the third embodiment, it is integrated with a movable lens group (hereinafter referred to as a rear group) composed of a third group 283, a fourth group 284, and a fifth group 285 built in the zoom optical system 22. The CCD 251 thus moved is configured to move in the Hy direction, but it may be configured to support the last five groups and the CCD 251 so as to be movable together.

1 is a schematic external view of a digital camera according to the present invention. 1 is a circuit block configuration diagram of a digital camera according to the present invention. It is a principal part disassembled perspective view of the imaging optical unit by Embodiment 1 in this invention. It is an upper surface sectional view of the bending optical system by Embodiment 1 in the present invention. It is an arrangement plan of an imaging optical unit by Embodiment 1 in the present invention. It is the upper surface sectional view of the bending optical system by Embodiment 2 in this invention, and the arrangement | positioning figure of an imaging optical unit. It is front sectional drawing of the digital camera by Embodiment 3 in this invention. It is a flowchart which shows the flow of the heat dissipation control in the digital camera which concerns on this invention.

Explanation of symbols

1 Digital camera 10 Housing (housing)
101 Shutter button 102 Power button 103 Flash 104 Shooting lens window 105 Viewfinder objective window 106 Grip part 107 LCD monitor 108 Optical viewfinder 109 Jog dial key (cross key)
DESCRIPTION OF SYMBOLS 110 Selector switch 111 Mode button group 115 Slit 152 Signal processing circuit 153 CDS circuit 154 AGC circuit 155 A / D converter 156 Timing generator 157 Aperture / shutter drive circuit 158 Focus / zoom motor drive circuit 159 Imaging optical unit drive circuit 161 Image processing CPU
162 Image processing unit 163 Black level correction unit 164 Pixel complementation unit 165 Resolution conversion unit 166 White balance control unit 167 Gamma correction unit 168 Matrix calculation unit 169 Shading correction unit 170 Image compression unit 171 Reference clock generation unit 175 Image memory 176 Memory card driver 177 Memory card 178 External communication I / F
181 Camera control CPU
183 LCD drive circuit 185 Gyro 191 Switch group (shutter button, etc.)
2 Imaging Optical Unit 20 Bending Optical System 21 Prism 22 Zoom Optical System 23 Objective Lens 24 Zoom Lens Group 24a, 24b Movable Lens 24c, 24d Fixed Lens 25 Focus Lens Group 210 Pivot 251 CCD Color Area Sensor 252 Temperature Sensor 253 Aperture / Shutter 254 Focus / zoom motor 255a, 255b Imaging optical unit drive motor 256a, 256b Guide plate 261 Flexible substrate 262 Heat dissipation sheet 271 Printed circuit board 272a, 272b Actuator 281 1 group 282 2 group 283 3 group 284 4 group 285 5 group 291 Rear group drive motor 292 2 group drive motor

Claims (4)

An image sensor that photoelectrically converts a subject optical image to generate an image signal;
Driving means for driving the image sensor;
Oscillating means for oscillating the image sensor, or moving means for moving the image sensor;
In an imaging device comprising: a temperature sensor that detects a temperature of the imaging element;
When the temperature detected by the temperature sensor during driving of the image sensor exceeds a preset reference temperature, driving of the image sensor by the drive unit is stopped, and the image sensor by the swing unit is stopped. An imaging apparatus comprising: control means for starting swinging; or control means for stopping driving of the imaging element by the driving means and starting movement of the imaging element by the moving means. A display means for displaying images and shooting information is provided.
The imaging apparatus according to claim 1, further comprising a control unit that displays warning information on the display unit when a temperature detected by the temperature sensor exceeds a preset reference temperature. 3. The imaging apparatus according to claim 1, wherein the swinging unit is a component of a camera shake correction mechanism that performs camera shake correction by swinging the image sensor in accordance with a shake of the imaging apparatus main body. . 2. The moving means moves a zoom optical system having a movable lens group, and the image pickup element is supported so as to be movable integrally with the movable lens group. Or the imaging device of 2.