CN1292583C - Electronic image pickup device - Google Patents
Electronic image pickup device Download PDFInfo
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- CN1292583C CN1292583C CNB2004100060719A CN200410006071A CN1292583C CN 1292583 C CN1292583 C CN 1292583C CN B2004100060719 A CNB2004100060719 A CN B2004100060719A CN 200410006071 A CN200410006071 A CN 200410006071A CN 1292583 C CN1292583 C CN 1292583C
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Abstract
Provided is an electronic imaging apparatus which does not bring about a deterioration in picture quality and in which wasteful power consumption is eliminated. The electronic imaging apparatus is equipped with a photographic optical system which forms the optical image of a subject, an imaging device which converts the optical image into an electric signal, a dust-proof filter which is arranged between the photographic optical system and the imaging device and which prevents dust or the like from being deposited on the photoelectric conversion surface of the imaging device and a microcomputer which makes the dust-proof filter perform a dust removing operation by vibrating the filter at prescribed frequencies and the computer vibrates the filter in a first vibration mode in timing corresponding to the start of an imaging operation and vibrates the filter in a second vibration mode in timing corresponding to the exchanging of the photographic optical system.
Description
Technical field
The present invention relates to electronic image pickup device, be specifically related to have the electronic image pickup device that to remove attached to the dust reduction capability of the dust on the component parts of for example camera arrangement etc.
Background technology
In the past, as an example of the technology relevant, proposed a kind of by making the cover glass (dustproof glass) of protecting imaging apparatus vibrate the technology of brushing lightly attached to the dust on this dustproof glass with the dust reduction capability of Optical devices.For example, there is the spy to open the technology that discloses in 2002-204379 number, wherein, uses piezoelectric element as the unit that makes the dustproof glass vibration.This piezoelectric element is reacted to the voltage that is applied and is flexible, with 1 cycle of stipulating the dustproof glass of being installed is added and shakes.
It is contemplated that dust is attached to the various situations on the dustproof glass.When changing photographic lens, exist because of the reflection mirror case exposes to make dust from the outside danger of invading and being attached on the dustproof glass of camera.Dust is higher when making shutter be in unlatching (OPEN) state under the situation that replaceable lens (lens unit) is not installed attached to the possibility on the dustproof glass.It is generally acknowledged that even under this situation, if shutter speed is fast, then problem is less.
On the other hand, along with the raising of the performance of imaging apparatus, a part of user is installed to camera on the telescope, carries out the photography of celestial body photo.In the photography of celestial body photo, because subject brightness is low, thereby aperture time is long.Therefore, the danger that in shutter opening, has dust to adhere to.In addition, the telescope replaceable lens according to camera mostly is big, and seal is also low.Therefore, contain the possibility that the air of dust contacts with dustproof glass and also become big.
The processing method of dust attachment issue when in above-mentioned prior art, not disclosing shutter opening in this long time for exposure.
Summary of the invention
The present invention is conceived to this problem and proposes, the purpose of this invention is to provide a kind of electronic image pickup device, it removes action by carry out suitable dust when the shooting of carrying out for example time exposure is moved, and can not cause image quality decrease, and eliminate useless power consumption.
The electronic image pickup device of invention 1 has: photographic optical system, and its optical image to subject carries out imaging; Image unit, it comprises the components of photo-electric conversion that are transformed into the signal of telecommunication by the optical image of above-mentioned photographic optical system imaging; Optical element, it is configured between the above-mentioned photographic optical system and the above-mentioned components of photo-electric conversion, prevents that dust etc. is attached on the photoelectric conversion surface of the above-mentioned components of photo-electric conversion; And control unit, it makes above-mentioned optical element carry out dust to remove action by above-mentioned optical element is vibrated with assigned frequency; It is characterized in that, above-mentioned control unit with the shooting of above-mentioned image unit action associated the 1st regularly, above-mentioned optical element is vibrated with the 1st vibration mode, in the 2nd timing except the shooting action of above-mentioned image unit, above-mentioned optical element is vibrated with the 2nd vibration mode simultaneously.
The above-mentioned the 1st regularly is meant: with the corresponding timing of beginning of the shooting action of above-mentioned image unit;
The above-mentioned the 2nd regularly is meant: the timing corresponding with the replacing of above-mentioned photographic optical system;
Above-mentioned the 1st vibration mode is meant: above-mentioned optical element is with the vibration mode of the frequency vibration beyond its resonance frequency;
Above-mentioned the 2nd vibration mode is meant: above-mentioned optical element is with the vibration mode of its resonance frequency vibration.
Invention 2 is characterised in that in invention 1 described electronic image pickup device, the above-mentioned the 1st regularly is the corresponding timing of beginning of moving with the shooting of above-mentioned image unit, and the above-mentioned the 2nd is the timing corresponding with the replacing of above-mentioned photographic optical system regularly.
Invention 3 is characterised in that in invention 1 described electronic image pickup device, above-mentioned electronic image pickup device has the pattern that makes above-mentioned optical element vibration according to manual operation, in this pattern, above-mentioned optical element is vibrated with above-mentioned the 2nd vibration mode.
Invention 5 is characterised in that in invention 1 described electronic image pickup device, above-mentioned the 1st vibration mode is to make the vibration mode of above-mentioned optical element with the frequency vibration beyond its resonance frequency.
Invention 6 is characterised in that in invention 1 described electronic image pickup device, above-mentioned the 1st vibration mode is the vibration mode that makes above-mentioned optical element intermittent control shaking.
Invention 7 is characterised in that in invention 1 described electronic image pickup device, above-mentioned the 1st vibration mode is to make above-mentioned optical element produce the vibration mode of row ripple.
Invent 8 and be characterised in that, in invention 1 described electronic image pickup device, above-mentioned the 1st vibration mode of execution in aperture time moves more than or equal to the shooting of setting or in the photography of B door.
Invention 9 is characterised in that in invention 1 described electronic image pickup device, above-mentioned the 1st vibration mode is the vibration mode that power consumption is lacked than above-mentioned the 2nd vibration mode.
Description of drawings
Fig. 1 illustrates the partial cut oblique view that the summary of the execution mode when the present invention is applied to digital camera constitutes.
Fig. 2 illustrates the block diagram that the system according to the camera of an embodiment of the invention constitutes.
Fig. 3 takes out the figure that represents to the part of the image unit 15 in the camera 1 of present embodiment, is will partly separate oblique view to what this image unit decomposition was represented.
Fig. 4 takes out the figure that represents to the part of the image unit 15 in the camera 1 of present embodiment, is that the part of this image unit assembled state is cut off the oblique view of representing.
Fig. 5 takes out the figure that represents to the part of the image unit 15 in the camera 1 of present embodiment, is the sectional drawing along the section of Fig. 4.
Fig. 6 only takes out the front elevation of representing to dustproof filter 21 in the image unit in this camera 1 15 and the piezoelectric element that is wholely set with it 22.
Fig. 7 illustrates the dustproof filter 21 when the piezoelectric element 22 of Fig. 6 has applied driving voltage and the state variation of piezoelectric element 22, is the sectional drawing along the A-A line of Fig. 6.
Fig. 8 illustrates the dustproof filter 21 when the piezoelectric element 22 of Fig. 6 has applied driving voltage and the state variation of piezoelectric element 22, is the sectional drawing along the B-B line of Fig. 6.
Fig. 9 is that concept nature illustrates in the image unit in this electronic image pickup device to dustproof filter 21 and applies the shake figure of formation of unit of adding of vibration.
Figure 10 is that the central part that illustrates with dustproof filter 21 is the figure that axle produces the state of capable ripple (progressive wave) vibration of advancing to direction of rotation X.
Figure 11 is the circuit diagram that roughly is illustrated in the formation of the dustproof filter drive circuit 140 in illustrated in fig. 2 the electronic image pickup device 1.
Figure 12 is the sequential chart that each signal aspect of each the component parts output from the dustproof filter drive circuit 140 of Figure 11 is shown.
Figure 13 is used for the flow chart that the action to the Bucom150 of the camera arrangement of the 1st execution mode according to the present invention describes.
Figure 14 is used for the figure that is elaborated in subprogram illustrated in fig. 13 " remove (CleanUp) action " (step S106).
Figure 15 is used for the figure that is elaborated in subprogram illustrated in fig. 13 " shooting action ".
Figure 16 is the figure that the relation of the amplitude of dustproof glass and driving frequency is shown.
Figure 17 is used for flow chart that the action according to the Bucom150 of the camera arrangement of the 2nd execution mode of the present invention is described.
Figure 18 is used for flow chart that the action according to the Bucom150 of the camera arrangement of the 3rd execution mode of the present invention is described.
Embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.
Fig. 1 illustrates the partial cut oblique view that the summary of the execution mode when the present invention is applied to digital camera constitutes.
That is, Fig. 1 is a part of cutting off camera body, briefly shows its inner oblique view that constitutes.
The camera 1 of present embodiment is made up of camera body portion 11 and lens unit 12 that split separately constitutes, and the two can freely load and unload this camera body portion 11 and lens unit 12 mutually.
And lens unit 12 remains on inside to the photographic optical system 12a that is made up of a plurality of lens and driving mechanism thereof etc.
This photographic optical system 12a is made of for example a plurality of optical lenses etc., so that by the light beam from subject is seen through, the picture that makes the subject that is formed by this subject light beam is in assigned position (on the photoelectric conversion surface of following imaging apparatus) imaging.
This lens unit 12 is adapted to the front of camera body portion 11 outstanding.In addition, camera body portion 11 is so-called einzel lens reflection mode cameras, it has various component parts etc. in inside, and have in its front as the photographic optical system installation portion 11a that links parts, this photographic optical system installation portion 11a is used to load and unload the lens unit 12 that configuration freely is used to keep photographic optical system 12a.
That is to say, substantial middle portion in the front face side of camera body portion 11 is formed with the exposure opening with regulation bore that can be directed to the subject light beam inside of this camera body portion 11, is formed with photographic optical system installation portion 11a in this exposure with the circumference of opening.
And, except being equipped with on the front of this camera body portion 11 the above-mentioned photographic optical system installation portion 11a, also the assigned position of portion, back side portion etc. is equipped with the various functional units that are used to make 11 actions of camera body portion in the above, for example, be used to produce the release-push 17 etc. of the index signal that makes photography action beginning etc.
Inside in this camera body portion 11 is equipped with various component parts at assigned position respectively: for example, viewfinder 13, it constitutes so-called viewing optical system; Shutter portion 14, it has tripper that the subject light beam was controlled to time of the photoelectric conversion surface of imaging apparatus irradiation etc. etc.; Image unit 15, it comprises that the conduct of assigned position of front face side of not making illustrated imaging apparatus and being provided in the photoelectric conversion surface of this imaging apparatus that is used to obtain the picture signal corresponding with the subject picture is used for pre-dust protection etc. and is attached to dustproof filter (being also referred to as dustproof glass) 21 of the dust proof member on this photoelectric conversion surface etc.; With with a plurality of circuit substrates (only main circuit substrate 16 having been made diagram) headed by the main circuit substrate 16 of various electric components that forming circuit is installed etc.
Restoring fast speculum 13b is constituted as: move freely between the position of the optical axis of avoiding photographic optical system 12a and the assigned position on this optical axis, be configured in the normal state, relative this optical axis has the angle of regulation on the optical axis of photographic optical system 12a, for example angle 45 degree.
Like this, when this camera 1 was in common state, the optical axis of subject light beam that sees through photographic optical system 12a was by quick recovery speculum 13b warpage, and this light beam is reflected to and is configured in the pentaprism 13a side that this restores speculum 13b top fast.
On the other hand, when this camera 1 was carried out the photography action, this restored the assigned position that speculum 13b moves to the optical axis of avoiding photographic optical system 12a fast, and like this, the subject light beam is directed into the imaging apparatus side.
In addition, shutter portion 14 adopts the identical parts of parts of general using in the tripper of focal plane mode for example and drive circuit thereof etc. and the existing camera etc.
Fig. 2 illustrates the block diagram that the system according to the camera of an embodiment of the invention constitutes.
That is, the camera arrangement of this execution mode mainly constitutes by camera body 11 with as the lens unit 12 of replaceable lens, and required lens unit 12 is installed in the front of camera body 11 with freely loading and unloading.
The control of lens unit 12 is carried out with microcomputer (hereinafter referred to as Lucom) 205 by lens control.
The control of camera body 11 is carried out with microcomputer (hereinafter referred to as Bucom) 150 by main body control.
In addition, when these Lucom205 and Bucom150 are linked together, carry out the electrical connection that to communicate by letter by communications connector 206.
And in this case, as camera arrangement, Lucom205 simultaneously is subordinated to Bucom150 and cooperates, and one side is carried out work.
In addition, in lens unit 12, be provided with photographic optical system 12a and aperture 203.
This photographic optical system 12a is driven by the illustrated DC motor of not doing that is positioned at lens actuating device 202.
In addition, aperture 203 is driven by the illustrated stepping motor of not doing that is positioned at aperture driving mechanism 204.
Lucom205 is according to controlling these each motor from the instruction of Bucom150.
And, in this camera body 11, be equipped with following component parts as shown in the figure.
For example, be provided with: the component parts (pentaprism 13a restores speculum 13b fast, eyepiece 13c, secondary speculum 114) that reflects mode as the einzel lens of optical system; Focal plane formula shutter 115 on the optical axis; And the AF sensor unit 116 that is used to accept to carry out automatic range from the folded light beam of above-mentioned secondary speculum 14.
In addition, be provided with: AF sensor drive driving circuit 117, it carries out drive controlling to above-mentioned AF sensor unit 116; Mirror drive mechanism 118, it carries out drive controlling to above-mentioned quick recovery speculum 13b; Shutter stored energy mechanism 119, its deposit are used to drive preceding act and the elastic force of back curtain of above-mentioned shutter 115; Shutter control circuit 120, it controls the mobile of these preceding curtains and back curtain; And light measuring circuit 121, it carries out photometry according to the light beam from above-mentioned pentaprism 13a and handles.
On optical axis, be provided with and be used for the subject by above-mentioned optical system is looked like to carry out the imaging apparatus 27 of light-to-current inversion as the components of photo-electric conversion.
In this case, this imaging apparatus 27 is subjected to the protection of dustproof filter 21, and this dustproof filter 21 is the transparent glass member as optical element that are provided between this imaging apparatus 27 and the photographic optical system 12a.
And, as a part that adds the unit that shakes that makes this dustproof filter 21 with assigned frequency vibration, for example, piezoelectric element 22 is installed at the circumference of this dustproof filter 21.
In addition, piezoelectric element 22 has 2 electrodes, and this piezoelectric element 22 can utilize as the dustproof filter drive circuit 140 that adds the unit part of shaking and make dustproof filter 21 vibrations, removes attached to the dust on this glass surface.
In addition, in order to measure the peripheral temperature of imaging apparatus 27, near dustproof filter 21, be provided with temperature measuring circuit 133.
In this camera arrangement, also be provided with: interface circuit 123, it is connected with imaging apparatus 27; LCD monitor 124; SDRAM 125, and it is provided with as storage area; And image process controller 128, it utilizes FlashROM126 and recording medium 127 etc. to carry out image processing, in this camera arrangement, can provide electro-photographic function and electronical record Presentation Function.
As other storage areas, the non-volatile memory cells as being used to store the required regulation Control Parameter of control camera is provided with the nonvolatile memory 129 that for example is made of EEPROM, and it can carry out access by Bucom150.
In addition, be provided with in Bucom150: action shows uses LCD151, and it is used for the operate condition of this camera is informed to the user by showing output; And camera operation switch (SW) 152.
Above-mentioned camera operation switch 152 is switches set of the action button that for example comprises that this cameras of operation of release-push, mode altering switch and mains switch etc. is required.
But also be provided with: as the battery 154 of power supply; And power circuit 153, its this supply voltage is transformed into the required voltage of each circuit unit of constituting this camera arrangement and this voltage is provided.
Below, the action of the camera arrangement of above-mentioned formation is described.At first, image process controller 128 comes control interface circuit 123 according to the instruction of Bucom150, is taken into view data from imaging apparatus 27.
This view data is transformed into vision signal by image process controller 128, exports demonstration by LCD monitor 124.
The user can confirm captured image from the display image of this LCD monitor 124.
SDRAM125 is the interim preservation memory of view data, the working region during as the changing image data etc.
In addition, this view data is configured to be stored in after being transformed into jpeg data in the recording medium 127.
Imaging apparatus 27 is subjected to the protection of the dustproof filter 21 that is made of transparent glass member as mentioned above.
Dispose at the circumference of this dustproof filter 21 and to be used for its glass is added the piezoelectric element 22 that shakes, this piezoelectric element 22 is driven by the also dustproof filter drive circuit 140 as the driver element work of this piezoelectric element 22 as following detailed description.
For dustproof, preferably being contained in imaging apparatus 27 and piezoelectric element 22 one with dustproof filter 21 serve as in one side and the housing by the encirclement of the framework shown in the dotted line.
Usually, exert an influence because temperature is a coefficient of elasticity to the glass material, the one of the main reasons that its natural frequency is changed, thereby its temperature of instrumentation are in use considered the variation of its natural frequency.
Preferably the variations in temperature of the dustproof filter 21 that is provided with for the front of protecting the imaging apparatus 27 that temperature at work sharply rises is measured the natural frequency of prediction this moment.
Therefore, under this routine situation, the transducer (not illustrating) that is connected with said temperature mensuration circuit 133 is provided with for the peripheral temperature of measuring imaging apparatus 27.
In addition, preferably the measuring point for the temperature of this transducer is set in the very near position of vibration plane from dustproof filter 21.
Being sent to Bucom150 from the output of the AF transducer in the AF sensor unit 116 by AF sensor drive driving circuit 117 carries out known range finding and handles.
In addition, the user can from the visual subject of eyepiece 13c of pentaprism 13a adjacency, on the other hand, the part of the light beam by this pentaprism 13a is directed into the optical sensor (not illustrating) in the light measuring circuit 121, carries out known photometry processing according to the light quantity that is detected herein.
Below, the details of the image unit 15 in the camera 1 of present embodiment is described.
Fig. 3, Fig. 4 and Fig. 5 take out the figure represent to the part of the image unit 15 in the camera 1 of present embodiment, and Fig. 3 will partly separate oblique view to what this image unit carried out exploded representation.
In addition, Fig. 4 cuts off the oblique view of representing to the part of this image unit assembled state, and Fig. 5 is the sectional drawing along the section of Fig. 4.
In addition, though the image unit 15 of the camera 1 of present embodiment is as mentioned above, be the unit that constitutes by a plurality of parts that comprise shutter portion 14, in Fig. 3 to Fig. 5, only keep the diagram of its major part, omit diagram to shutter portion 14.
In addition, for the position relation of each component parts is shown, in Fig. 3 to Fig. 5, also show main circuit substrate 16 together, this main circuit substrate 16 be arranged on this image unit 15 near, imaging apparatus 27 is installed, the circuit of the camera system that is made of imaging signal processing circuit and working storage etc. also is installed simultaneously.
In addition, this main circuit substrate 16 adopts the main circuit substrate of general using in existing camera etc., thereby omits its explanation with regard to himself details.
Image unit 15 is by constituting with the lower part: imaging apparatus 27, it is made of CCD etc., obtain with the photoelectric conversion surface that shines oneself through photographic optical system 12a on the corresponding picture signal of light; Imaging apparatus fixed head 28, its lamellar parts by this imaging apparatus 27 of fixed support constitute; Optical low-pass filter (Low Pass Filter :) 25 hereinafter referred to as optics LPF, the side that it is provided in the photoelectric conversion surface of imaging apparatus 27 is the optical element that forms in order to remove radio-frequency component from the subject light beam that sees through photographic optical system 12a irradiation; Low pass filter support unit 26, it is configured in the circumference between this optics LPF25 and the imaging apparatus 27, is formed by elastomeric element of shaped as frame roughly etc.; Imaging apparatus housing case parts 24 (hereinafter referred to as CCD housing 24), it is adapted to when holding and being maintained fixed imaging apparatus 27 optics LPF25 (optical element) is close to and is supported in its peripheral part to its position nearby, and the regulation position is closely contacted with following dustproof filter support unit 23; Dustproof filter support unit 23, it is configured in the front face side of this CCD housing 24, dustproof filter 21 is close to be supported in its peripheral part to position near it; Dustproof filter 21, it is a dust proof member, is supported by this dustproof filter support unit 23, in the front face side of the optics LPF25 of the photoelectric conversion surface side of imaging apparatus 27, and keeps predetermined distance between this optics LPF25, is configured in assigned position relatively; Piezoelectric element 22, the circumference that it is provided in this dustproof filter 21 is to be used for this dustproof filter 21 is applied adding to shake and using parts of regulation vibration, for example, is made up of electricapparatus inverting element etc.; And pressing component 20 etc., this pressing component 20 is made of the elastomer that is used to make dustproof filter 21 and dustproof filter support unit 23 airtight joints and be maintained fixed.
Imaging apparatus 27 is by accepting to carry out the light-to-current inversion processing through the subject light beam of photographic optical system 12a on the photoelectric conversion surface of oneself, obtain be formed on this photoelectric conversion surface on the corresponding picture signal of subject picture, it for example uses charge coupled cell (CCD:ChargeCoupled Device).
This imaging apparatus 27 is installed in assigned position on the main circuit substrate 16 across imaging apparatus fixed head 28.
On this main circuit substrate 16, as mentioned above, imaging signal processing circuit and working storage etc. are installed simultaneously, handle by these circuit from the signal of imaging apparatus 27 outputs.
Clip low pass filter support unit 26 in the front face side of imaging apparatus 27 and be equipped with optics LPF25.
And, be equipped with CCD housing 24, to coat these imaging apparatuss 27, low pass filter support unit 26 and optics LPF25.
That is to say, in CCD housing 24, partly be provided with the opening 24c of rectangle, in this opening 24c, set optics LPF25 and imaging apparatus 27 from its rear side in substantial middle.
Inner peripheral portion at the rear side of this opening 24c as shown in Figure 4 and Figure 5, is formed with the end difference 24a that section is roughly the L font.
As mentioned above, between optics LPF25 and imaging apparatus 27, be equipped with the low pass filter support unit 26 that constitutes by elastomeric element etc.
This low pass filter support unit 26 is provided in the position of avoiding the effective range of its photoelectric conversion surface in the circumference of front face side of imaging apparatus 27, and nearby contacts with the circumference of the rear side of optics LPF25.
And, make between optics LPF25 and the imaging apparatus 27 to keep roughly air-tightness.
Thus, by low pass filter support unit 26 provide to the resilient force of optical axis direction on optics LPF25.
Therefore, by the circumference of the front face side of optics LPF25 being configured to roughly airtight contact of end difference 24a with CCD housing 24, opposing will make the elastic force of this optics LPF25 at the low pass filter support unit 26 of its optical axis direction displacement, and LPF25 limits in the position of optical axis direction to this optics.
In other words, the optics LPF25 of inside that is inserted into the opening 24c of CCD housing 24 from rear side is carried out the position limit of optical axis direction by the end difference 24a of CCD housing 24.
Thus, this optics LPF25 can not deviate to the outside to front face side from the inside of CCD housing 24.
Like this, be inserted into from rear side as optics LPF25 after the inside of opening 24c of CCD housing 24, set imaging apparatus 27 in the rear side of optics LPF25.
In this case, between optics LPF25 and imaging apparatus 27, clip low pass filter support unit 26 at circumference.
In addition, imaging apparatus 27 being clipped imaging apparatus fixed head 28 as mentioned above is installed on the main circuit substrate 16.
Then, use screw 28b that the rear side of imaging apparatus fixed head 28 from CCD housing 24 is fixed on the screw hole 24e across pad 28a.
In addition, use screw 16d that main circuit substrate 16 is fixed on the imaging apparatus fixed head 28 across pad 16c.
In the front face side of CCD housing 24, use the screw 23b filter support unit 23 that will prevent dust to be fixed on the screw hole 24b of CCD housing 24.
In this case, at the assigned position of the front face side of the peripheral side of CCD housing 24, as among Fig. 4 and Fig. 5 in detail shown in, form the roughly cannelure 24d of ring-type.
On the other hand, the assigned position in the rear side of the peripheral side of dustproof filter support unit 23 forms the roughly annular convex 23d corresponding with the cannelure 24d of CCD housing 24 (Fig. 3 illustrates) of ring-type on whole circumference.
Therefore, cooperate, make CCD housing 24 and dustproof filter support unit 23, that is: be formed with in the zone of cannelure 24d and annular convex 23d and roughly cooperate airtightly mutually at annular section by making annular convex 23d and cannelure 24d.
In addition, circumference in the one side (being rear side in the present embodiment) of dustproof filter 21, use for example piezoelectric element 22 to be set and become one with methods such as adhesive stickups, this piezoelectric element 22 is the adding to shake and use parts of regulation that are used for this dustproof filter 21 is applied vibration, is formed by electricapparatus inverting element etc.
This piezoelectric element 22 can make dustproof filter 21 produce the regulation vibration by apply the driving voltage of regulation from the outside.
And dustproof filter 21 is maintained fixed by the pressing component 20 that elastomers such as adopting flat spring constitutes, so as with dustproof filter support unit 23 airtight joints.
Substantial middle portion at dustproof filter support unit 23 nearby is provided with circular or polygonal opening 23f.
This opening 23f passes through the subject light beam through photographic optical system 12a, is configured to make this light beam irradiates required enough big size to the photoelectric conversion surface of the imaging apparatus 27 that is configured in its rear.
At the circumference of this opening 23f, form ring-type roughly to the side-prominent 23e of wall portion (with reference to Fig. 4 and Fig. 5) in front, the front at the 23e of this wall portion further forms support 23c to the front side-prominently.
On the other hand, near the outer peripheral edges portion of the front face side of dustproof filter support unit 23, form a plurality of (being 3 positions in the present embodiment) to the side-prominent protruding part 23a in front at assigned position.
This protruding part 23a is used for fixing the pressing component 20 that keeps dustproof filter 21 and the position that forms in order to fixedly install, and fixed parts such as this pressing component 20 use screw 20a is fixedly installed the leading section of protruding part 23a.
Pressing component 20 is the parts that formed by elastomers such as flat springs as mentioned above, by its base end part is fixed on the protruding part 23a, free end is contacted with the outer peripheral edges portion of dustproof filter 21, and to dustproof filter support unit 23 sides, promptly optical axis direction is pushed this dustproof filter 21.
In this case, the regulation position of the piezoelectric element 22 of the outer peripheral edges portion by making the rear side that is provided in dustproof filter 21 contacts with support 23c, and filter 21 and piezoelectric element 22 limit in the position of optical axis direction to preventing dust.
Like this, dustproof filter 21 is fixed and is held in across piezoelectric element 22 and dustproof filter support unit 23 airtight joints.
In other words, dustproof filter support unit 23 relies on the pressure of pressing component 20, across piezoelectric element 22 and dustproof filter 21 airtight joints.
In addition, as mentioned above, dustproof filter support unit 23 and CCD housing 24 and cannelure 24d and annular convex 23d (with reference to Fig. 4 and Fig. 5) be air-tight fit roughly mutually, meanwhile, dustproof filter support unit 23 and dustproof filter 21 rely on the pressure of pressing component 20, by piezoelectric element 22 airtight joints.
In addition, being provided in optics LPF25 in the CCD housing 24 is adapted between the end difference 24a of the circumference of the front face side of this optics LPF250 and CCD housing 24 and is airtight conditions roughly.
And, in the rear side of optics LPF25, be equipped with imaging apparatus 27 across low pass filter support unit 26, between optics LPF25 and image unit 27, also keep roughly air-tightness.
Like this, in optics LPF25 and dustproof filter 21 opposed spaces, be formed with the space part 51a of regulation.
In addition, by the peripheral side of optics LPF25, that is: CCD housing 24, dustproof filter support unit 23 and dustproof filter 21 form spatial portion 51b.
This spatial portion 51b forms the seal cavity (with reference to Fig. 4 and Fig. 5) that stretches out to the outside of optics LPF25.
In addition, this spatial portion 51b is configured to the space than space part 51a spaciousness.
And the space of being made up of space part 51a and spatial portion 51b is by aforesaid CCD housing 24, dustproof filter support unit 23, dustproof filter 21 and the optics LPF25 seal cavity 51 of gas-tight seal roughly.
Like this, in the image unit 15 in the camera of present embodiment, constitute hermetically-sealed construction portion, the sealing structural portion forms roughly airtight seal cavity 51, and sealing space 51 is formed on the periphery of optics LPF25 and dustproof filter 21, comprises space part 51a.
And the sealing structural portion is arranged on the position of the periphery of optics LPF25 to its outside nearby.
And, in the present embodiment, by constituting hermetically-sealed construction portion as the dustproof filter support unit 23 of the 1st parts with as CCD housing 24 of the 2nd parts etc., should dustproof filter support unit 23 dustproof filter 21 be close to and be supported in its peripheral part to position near it, this CCD housing 24 is adapted to optics LPF25 is close to and is supported in its peripheral part to its position nearby, closely contacts with dustproof filter support unit 23 at the regulation position of oneself simultaneously.
In the camera of the present embodiment of above-mentioned formation, by the dustproof filter 21 of arranged opposite on the assigned position of the front face side of imaging apparatus 27, seal cavity 51 sealings of the periphery of the photoelectric conversion surface of imaging apparatus 27 and dustproof filter 21 will be formed on, on the photoelectric conversion surfaces attached to imaging apparatus 27 such as advance preventing dust.
And, in this case, apply periodic voltage by the piezoelectric element 22 that becomes one to the circumference that is adapted to and should dustproof filter 21, dustproof filter 21 is applied the regulation vibration, can remove and expose dust on the face etc. attached to the front face side of dustproof filter 21.
Fig. 6 is that the piezoelectric element 22 that only is wholely set the dustproof filter 21 in the image unit in this camera 1 15 with this dustproof filter 21 takes out the front elevation of representing.
In addition, Fig. 7 and Fig. 8 show the dustproof filter 21 when the piezoelectric element 22 of Fig. 6 applies driving voltage and the state variation of piezoelectric element 22, and Fig. 7 is the sectional drawing along the A-A line of Fig. 6, and Fig. 8 is the sectional drawing along the B-B line of Fig. 6.
Herein, for example, when applied negative (minus to piezoelectric element 22;-) during voltage, dustproof filter 21 deforms shown in the solid line among Fig. 7 and Fig. 8, on the other hand, when having applied just (Plus to piezoelectric element 22; +) during voltage, dustproof filter 21 deforms shown in the dotted line among these figure.
In this case, because by the vibration node position shown in the reference marks 21a of Fig. 6 to Fig. 8, amplitude essence is zero, thereby sets the support 23c that makes dustproof filter support unit 23 for and contact with position corresponding to this joint 21a.
Like this, can support dustproof filter 21 efficiently, and not hinder the vibration of dustproof filter 21.
And, under this state,, apply periodic voltage to piezoelectric element 22 by the dustproof filter drive circuit 140 of control at the appointed time, make dustproof filter 21 vibrations, remove attached to these dustproof filter 21 lip-deep dusts etc.
In addition, Ci Shi resonance frequency is decided by shape, thickness and the material etc. of dustproof filter 21.
Though to example shown in Figure 8, show the situation that 1 vibration takes place at above-mentioned Fig. 6, be not limited thereto, the high order vibration also can take place.
Fig. 9 is that concept nature illustrates in the image unit in this electronic image pickup device to dustproof filter 21 and applies the shake figure of formation of unit of adding of vibration.
As shown in Figure 9, the piezoelectric element 22 of annular is polarized into 22a and 22b.In this case, piezoelectric element 22a and 22b are polarized at thickness direction in along the circumferential direction having done 8 zones of cutting apart, and polarised direction is with just (+) and bear (-) and represent, the opposite zone of polarised direction is by alternate configurations.And a piezoelectric element 22b is configured in the position that relative another piezoelectric element 22a only is offset the quarter-wave (1/4 λ) of vibration wavelength (1 wavelength is equivalent to the just length of (+), negative (-) polairzed area) herein.
Use dustproof filter drive circuit 140, the piezoelectric element 22a and the 22b filter of such formation applied assigned frequency at thickness direction separately voltage.
In this case, the frequency signal of exporting from the oscillator 34 of dustproof filter drive circuit 140 (the 1st periodic voltage signal) is directly imposed on piezoelectric element 22b, on the other hand, to piezoelectric element 22a, 90 ° of phasers 35 of the dustproof filter drive circuit 140 of use apply the signal (the 2nd periodic voltage signal) of 90 ° of phase deviations.
By sort signal being imposed on each piezoelectric element 22a and 22b, dustproof filter 21 is shown in Figure 10 (only showing dustproof filter 21), generation is an axle with the central part of dustproof filter 21, the capable ripple vibration of advancing to direction of rotation X (generation peak Y and paddy T replace uniformly-spaced, etc. the vibration of amplitude).
In addition, when seeing the capable ripple that is produced by piezoelectric element 22a and 22b at any time, the central part (optical axis) of its filter 21 that prevents dust relatively is symmetric shape roughly.
Figure 11 is the circuit diagram that diagrammatically is illustrated in the formation of the dustproof filter drive circuit 140 in this electronic image pickup device 1 of Fig. 2 explanation.Figure 12 is the sequential chart that each signal aspect of each the component parts output from the dustproof filter drive circuit 140 of Figure 11 is shown.
Although be provided with clock generator 255 in main body control with the inside of microcomputer 41, yet this clock generator 255 is according to the frequency output pulse signal (fundamental clock) enough faster than the signal frequency that will impose on piezoelectric element 22a, 22b (with reference to Sig1 shown in Figure 12).This basic clock signal is imported into the N system counter 241 of dustproof filter drive circuit 140.N system counter 241 pulse signals are counted, and when reaching setting=N, the output counting finishes pulse signal at every turn.That is, basic clock signal is carried out 1/N frequency division (with reference to Sig2 shown in Figure 12).
Pulse signal behind the frequency division because the duty ratio of high (High) and low (Low) is not 1: 1, thereby is transformed into duty ratio 1: 1 by the one 1/2 frequency dividing circuit 242-1.At this moment, frequency becomes half (with reference to Sig3 shown in Figure 12).Output signal from the one 1/2 frequency dividing circuit 242-1 is imported into the 2 1/2 frequency dividing circuit 242-2 and distance (ExOR) circuit 247.Be input to the pulse signal of the 2 1/2 frequency dividing circuit 242-2, frequency becomes half back output (with reference to Sig4 shown in Figure 12) again.
Herein, under height (High) state of pulse signal Sig4, MOS transistor Q01 (244b1) is in connection (ON) state.And pulse signal Sig4 is applied in to MOS transistor Q02 (244c1) by the 1st inverter 243-1.In this case, under pulse signal Sig4 low (Low) state, MOS transistor Q02 (244c1) is in on-state.
Like this, if 2 MOS transistor Q01 (244b1) that are connected with 1 side of transformer A (245-1) and Q02 (244c1) are in alternately on-state, then produce the signal of Sig5 shown in Figure 12 in 2 sides of this transformer A (245-1).In this case, the ratio of winding of transformer A (245-1) is decided by the output voltage and the required voltage of driving another piezoelectric element 22a of power circuit 153.
In addition, resistance R 00 (246-1) sets in order to limit super-high-current inflow transformer A (245-1).
When drive pressure electric device 22a, Q00 (244a1) is in connection (ON) state, and is necessary to apply voltage from power circuit 153 to the centre cap of transformer A (245-1).And, in this case, carry out the control that is switched on or switched off of Q00 (244a1) with the P_PwContA of microcomputer 150 by main body control.
In addition, the set point=N of N system counter 241 is set by the port=D_NCnt of main body control with microcomputer 150.That is to say that main body control by set point=N is controlled, can change the driving frequency of piezoelectric element 22a, 22b with microcomputer 150 arbitrarily.
Use following formula (1) to calculate driving frequency.
fdrv＝fpls/4N ……(1)
In the formula, N: to the set point of N system counter 241
Fpls: the output pulse frequency of clock generator 255
Fdrv: the frequency of the signal that applies to piezoelectric element 22a
Thus, apply the drive signal (Sig5) of assigned voltage to piezoelectric element 22a.
On the other hand, the output signal Sig3 of the one 1/2 frequency dividing circuit 242-1 is output to the 3 1/2 frequency dividing circuit 242-3 via distance (ExOR) circuit 247.In this case, when main body control is in height (High) state with the port P_ θ Cont of microcomputer 150, pulse signal Sig3 counter-rotating.Afterwards, be output to the 3 1/2 frequency dividing circuit 242-3.
In addition, when port P_ θ Cont was in low (Low) state, pulse signal Sig3 was output to the 3 1/2 frequency dividing circuit 242-2 (with reference to Sig6 shown in Figure 12) under original state.This pulse signal Sig6 is output (with reference to Sig7 shown in Figure 12) after being divided into half frequency again by the 3 1/2 frequency dividing circuit 242-3.Like this, drive the 2nd inverter 243-2, Q11 (244b2), Q12 (244c2), transformer B (245-2), apply the drive signal (Sig8) of assigned voltage to piezoelectric element 22b.
In addition, the function separately of the 2nd inverter 243-2, Q11 (244b2), Q12 (244c2), transformer B (245-2), resistance R 10 and above-mentioned the 1st inverter 243-1, Q01 (244b1), Q02 (244c1), transformer A (245-1), resistance R 00 (246-1) function separately are roughly the same.
In addition, in any one of first～the 3 1/2 frequency dividing circuit 242-1,242-2,242-3, all the rising edge of the pulse signal imported is reacted, carry out the frequency division action.
And even the frequency of pulse signal is identical, when signal reversed, the pulse signal that the 2 1/2 frequency dividing circuit 242-2 and the 3 1/2 frequency dividing circuit 242-3 export separately also produced phase difference.Phase difference under this situation is 90 °.
Therefore, at the signal Sig5 that imposes on piezoelectric element 22a with impose on and produce 90 ° phase difference between the signal Sig8 of piezoelectric element 22b.And this phase difference can be controlled by the port P_ θ Cont of main body control with microcomputer 150.For example, if port P_ θ Cont then produces 90 ° phase difference, if under low (Low) state, then do not produce phase difference under high (High) state.That is to say,, can apply multi-form vibration dustproof filter 21 by port P_ θ Cont is controlled.
The 1st execution mode
Figure 13 is used for the flow chart that the action to the Bucom150 of the camera arrangement of the 1st execution mode according to the present invention describes.
If the mains switch of camera has been done connection (ON) operation, then Bucom150 starts working.At step S100, carry out the processing that is used to start camera arrangement.Control power circuit 153 provides electric power to each circuit unit that constitutes this camera arrangement.Carry out the initial setting of each circuit in addition.
Step S101 is used for by communicating the action step that action detects the state of lens unit 12 with Lucom205, and it is periodically carried out.Be installed on the camera body 11 if detect lens unit 12, then forwarded step S103 to from step S102 at step S102.At step S103, be arranged on 2 piezoelectric element 22a, 22b stipulated time (T0) on the dustproof filter 21 with resonance frequency (f0) driven in phase.Shake for 2 piezoelectric element 22a, 22b are added, the value of setting for N system counter 241 is stored in the nonvolatile memory 129.In order to remove, also be stored in the nonvolatile memory 129 dustproof filter 21 being added the time (T0) of shaking attached to the dust on the dustproof filter 21.Carry out dustproof action according to these data.Dustproof filter 21 vibrates as shown in Figure 7 and Figure 8, removes dust.
On the other hand, when not detecting lens unit 12 at step S102 when being installed on the camera body 11, forward step S104 to from step S102.Step S104 is the treatment step that the state of camera operation switch 152 is carried out the periodicity detection.At step S105, the state of the clear switch of one of camera operation switch 152 is judged., when having operated clear switch, forward step S106 to herein, execution subroutine " is removed action ".That Details as Follows is described for subprogram " remove action ".
On the other hand, at step S105, when not operating clear switch, forward step S107 to.At step S107, the state of first release-push of one of camera operation switch 152 is judged.If first release-push is connected (ON), then forward step S108 to, if disconnect (OFF), then forward step S101 to.
If forward step S108 to, then obtain the monochrome information of subject from light measuring circuit 121.Then, calculate the time for exposure (Tv value) of imaging apparatus 27 and the aperture settings value (Av value) of lens unit 12 according to this information.
At next step S109, obtain the detection data of AF sensor unit 116 via AF sensor drive driving circuit 117.Bucom150 calculates the focus departure according to these data.At step S110, judge that this departure of calculating whether in tolerance band, under the situation of denying, carries out drive controlling at step S111 to the photographic lens among the photographic optical system 12a, turn back to step S101.
On the other hand, when at step S110, departure forwards step S112 in tolerance band the time.At step S112, the mode of operation of the 2nd release-push of one of camera operation switch 152 is judged.When having carried out the operation of camera operation switch 152, forward step S113 to, when not operating, forward step S101 to.
At step S113, set the aperture of the photographic lens among the photographic optical system 12a according to the Av value of calculating at step S105.At step S114, will restore the speculum 13b position that makes progress fast and drive.
In subsequently step S115 step, the setting of the permission flag of preventing dust to step S117.Dustproof permission flag is to be used to indicate whether remove the sign of action with shooting action executed in parallel dust.When dustproof permission flag was eliminated (" 0 "), dust was removed action and is under an embargo, and when dustproof permission flag was set (" 1 "), it is licensed that dust is removed action.When aperture time is longer than the stipulated time, set dustproof permission flag.When aperture time was long, the time of dustproof filter 21 contact extraneous airs was elongated, dust was arranged attached to the danger on the dustproof filter 21 in exposure.
And when having selected B door photography (bulb photography), the user connect release-push during, owing to shutter 14 is maintained at unlatching (Open) state, thereby the danger that has dust to adhere to.And in the photography of B door, the opening time of shutter 14 can not be predicted (time for exposure that the photograph pusher side can not detect user expectation).Therefore, in the photography of B door, must carry out dust and remove action.
In the present embodiment, although do not mention especially, yet can judge that whether carrying out dust removes action according to photograph mode.This is because there is the big pattern of aperture time (night scene photograph mode etc.) in photograph mode.
At first judge at step S115 whether aperture time is bigger than setting.,, then forward step S117 to herein,,, then forward step S116 to, so that remove dustproof permission flag if less than setting so that set dustproof permission flag if more than or equal to setting.
In addition, at step S115 also to whether having selected the photography of B door to judge.When having selected B door when photography, execution in step S117, so that set dustproof permission flag, if the photography of non-selected B door, execution in step S116 then is so that remove dustproof permission flag.Behind execution in step S116 or step S117, forward step S118 to.
At step S118, shutter 14 is opened (OPEN) control.At step S119, execution subroutine " shooting action ".The detailed action of subprogram " shooting action " is as described below.At step S120, shutter 14 is closed (CLOSE) control.At step S121, will restore speculum 13b fast and drive to upper/lower positions.And then, at step S122, give shutter 14 energy storage.At step S123, the aperture of the photographic lens among the photographic optical system 12a is driven to the release position.At step S124, be taken into view data from imaging apparatus 27, it is transformed into after the prescribed form, be saved in recording medium.
Figure 14 is used for " removing and move " figure that (step S106) is elaborated in subprogram illustrated in fig. 13.If the user connects (ON) clear switch, then carry out this subprogram.Dust is removed action and is automatically performed by camera as required.Yet the dust that automatically performs except camera is removed the action, and to remove action more convenient if can carry out dust according to user's the meaning.
In addition, in order in the manufacturing process of camera, to carry out motion test, must carry out dust arbitrarily by manual operation and remove action.In order to satisfy these requirements, there is this subprogram.In addition, in this subprogram, be fixed on the position, and shutter 14 also is in unlatching (OPEN) state, thereby can observes the state of the dustproof filter 21 that adds center of percussion owing to restore fast speculum 13b.When being attached with big dust, not wishing it is brushed lightly and drop between dustproof filter 21 and the shutter 14.Also can remove action dust is discharged to the camera outside by the dust that uses this subprogram.
At first, make quick recovery speculum 13b move to state at step S150.At step S151, shutter 14 is set at unlatching (OPEN) state.At step S152, beginning is with frequency f 0 driven in phase 2 piezoelectric element 22a, 22b.Like this, dustproof filter 21 begins vibration as shown in Figure 7 and Figure 8.
At step S153, detect the state of clear switch, wait for up to this clear switch at step S153 disconnecting (OFF).During clear switch is connected, continue the vibration that adds of dustproof filter 21 and do.The user can be as long as remain on on-state to clear switch in where necessary.If clear switch disconnects, then forward step S154 to, stop to be arranged on the piezoelectric element 22a on the dustproof filter 21, the driving of 22b.Afterwards, forward step S155 to.
At step S155, shutter 14 is set at closed condition.At step S156, drive to upper/lower positions restoring speculum 13b fast.At step S157, carry out the energy storage action of shutter 14.Return then.
Figure 15 is used for the figure that is elaborated in subprogram illustrated in fig. 13 " shooting action " (step S119).At step S200, the state of dustproof permission flag is judged.If dustproof permission flag is " 1 ", then forward step S201 to, do so that begin the vibration that adds of dustproof filter 21, if dustproof permission flag is " 0 ", then forward step S202 to.At step S201, apply the drive signal of frequency for (f0+ Δ f) and homophase to 2 piezoelectric element 22a, 22b.F0 is a resonance frequency, and Δ f is following side-play amount.
Resonance frequency f0 is decided by the material and the shape of dustproof filter 21.If drive dustproof filter 21 with resonance frequency f0, then as shown in figure 16, the amplitude maximum of dustproof filter 21.The amplitude of dustproof filter 21 is big more, and the ability that dusts off is just big more.Yet, when resonance frequency f0, because the impedance of piezoelectric element 22a, 22b decline, thereby the required electric power of the driving of dustproof filter 21 increases.In addition, if dustproof filter 21 is out of shape significantly, then the aberration that is produced by dustproof filter 21 increases, and has the danger that causes image deterioration.
Therefore, in the present embodiment, considered these problems, deliberately made the driving frequency of the dustproof filter 21 in the shooting action deviate from resonance frequency f0.Side-play amount (Δ f) is stored in the nonvolatile memory 129.If filter is with the dustproof filter 21 of the frequency drives beyond the resonance frequency f0, though then the amplitude of dustproof filter 21 reduces, but if not being purpose to remove the dust that has adhered to, be purpose but adhere to the prevention dust, then some of amplitude reduce does not become big problem.
At next step S202, indicating image processing controller 128 begins the shooting action.At step S203, judge whether be in the photography of B door.If in the photography of B door, then forward step S204 to.At step S204, wait for disconnecting up to release-push.If release-push disconnects, then forward step S206 to.
On the other hand, when at step S203, not in the photography of B door the time, forward step S205 to from step S203.At step S205, make timer conter action, during the aperture time of step S108 decision in wait.Afterwards, forward step S206 to.
At step S206, send ceasing and desisting order of shooting action to image process controller 128.At step S207, the state of dustproof permission flag is judged.If dustproof permission flag is " 1 ",,, turn back to main program stopping the adding after vibration does of dustproof filter 21 then at step S208.And when dustproof permission flag is " 0 ", turn back to main program immediately.
According to above-mentioned the 1st execution mode, in camera arrangement with the function that makes dustproof filter vibrate to remove dust, because when photographic lens is changed or when the operation clear switch, with the resonance frequency of dustproof filter 21 this dustproof filter 21 is added and to shake, simultaneously when the shooting action of carrying out time exposure or when the B door is photographed, with from resonance frequency f0 only the frequency of shifted by delta f (f0+ Δ f) dustproof filter 21 added shake, thereby provide the electronic image pickup device that can not cause deterioration in image quality and eliminate useless power consumption.
The 2nd execution mode
Figure 17 is used for the flow chart that the action to the Bucom150 of the camera arrangement of the 2nd execution mode according to the present invention describes.The 2nd execution mode is characterised in that, in the subprogram that in the 1st execution mode, illustrates " shooting action " (the step S119 of Figure 13), and the dustproof filter 21 of driver off and on.Other steps are identical with the 1st execution mode.
At first, detect the state of dustproof permission flag at step S400.If dustproof permission flag is " 1 ", then forward step S401 to, do so that begin the vibration that adds of dustproof filter 21.At step S401, to dustproof filter 21 is added the piezoelectric element 22a that shakes, the drive signal that 22b applies regulation.Afterwards, forward step S402 to.
On the other hand, if at step S400, dustproof permission flag is " 0 ", then forwards step S402 immediately to.At step S402, indicating image processing controller 128 begins the shooting action.At step S403, judge whether be in the photography of B door.If the photography of B door then forwards step S405 to, detect the state of release-push.Disconnect if detect release-push, then forward step S406 to,, then forward step S4050 to if release-push is in on-state.At step S4050, the vibration that adds that stops dustproof filter 21 is at the appointed time done.Then, beginning to add vibration again does.At step S4051, wait for the stipulated time, do so that continue to add vibration.By the effect of step S4050 and step S4051, the dust of carrying out off and in the photography of B door is removed action.The photography action of B door is to utilize when the low subject of brightness of celestial body etc. is photographed.Therefore, the time for exposure is very long sometimes.Therefore, wish to reduce dust as far as possible remove the required electric power of action.Therefore, the drive actions by the filter 21 that prevents dust off and on suppresses driving electric.
On the other hand, when not being in the B door photography time, forward step S404 in step S403.At step S404, make the timer conter action, and in the aperture time of step S108 decision, wait for.Forward step S406 then to.In the present embodiment, carry out dust continuously and remove action.Yet, preferably same when aperture time is long with the photography of B door, carry out dust off and on and remove action.For example, setting is used for judging that carrying out continuously still is intermittently to carry out the dust that exposes to remove the decision content of action.In Figure 17, increase then and the switching processing step is carried out in continuous action and intermitten according to this decision content.
At step S406, send ceasing and desisting order of shooting action to image process controller 128.At step S407, the state of dustproof permission flag is judged.If dustproof permission flag is " 1 ",,, turn back to main program stopping the adding after vibration does of dustproof filter 21 then at step S408.And if dustproof permission flag is " 0 ", then turn back to main program immediately.
According to above-mentioned the 2nd execution mode, in camera arrangement with the function that makes dustproof filter vibrate to remove dust, because when photographic lens is changed or when the operation clear switch, with the resonance frequency of dustproof filter 21 this dustproof filter 21 is added and to shake, simultaneously when the shooting action of carrying out time exposure or when the B door is photographed, dustproof off and on filter 21 adds and shakes, thereby the electronic image pickup device of eliminating useless power consumption is provided.
The 3rd execution mode
Figure 18 is used for the flow chart that the action to the Bucom150 of the camera arrangement of the 3rd execution mode according to the present invention describes.The 3rd execution mode is characterised in that, in the subprogram that illustrates in the 1st execution mode " shooting action " (the step S119 of Figure 13), uses the row ripple to drive dustproof filter 21.Other steps are identical with the 1st execution mode.
At first, the state of dustproof permission flag is judged at step S300.If sign is " 1 ", then forward step S301 to, do so that begin the vibration that adds of dustproof filter 21.At step S301, apply frequency for (fs) and each other in the drive signal of 90 ° phase place to 2 piezoelectric element 22a, 22b.By this action, as shown in figure 10, in dustproof filter 21, produce the row ripple.By selecting the few type of drive of deflection of dustproof filter 21, can suppress increase by the aberration of dustproof filter 21 generations.After step S301, forward step S302 to.
On the other hand, if at step S300, sign is " 0 ", then forwards step S302 immediately to.At step S302, indicating image processing controller 128 begins the shooting action.At step S303, judge whether be in the photography of B door.If in the photography of B door, then forward step S304 to.At step S304, wait for up to release-push disconnecting.If release-push disconnects, then forward step S306 to.
On the other hand,, forward step S305 in step S303, make the timer conter action, and in the aperture time of step S108 decision, wait for from step S303 when not being in B door photography the time.Behind step S305, forward step S306 to.
At step S306, send ceasing and desisting order of shooting action to image process controller 128.At step S307, the state of dustproof permission flag is judged.If sign is " 1 ",,, turn back to main program stopping the adding after vibration does of dustproof filter 21 then at step S308.In addition, if sign is " 0 ", then turn back to main program immediately.
According to above-mentioned the 3rd execution mode, in camera arrangement with the function that makes dustproof filter vibrate to remove dust, because when photographic lens is changed or when the operation clear switch, with the resonance frequency (non-capable ripple) of dustproof filter 21 this dustproof filter 21 is added and to shake, simultaneously when the shooting action of carrying out time exposure or when the B door is photographed, drive dustproof filter 21 so that produce the row ripple, thereby can not provide and can increase the electronic image pickup device that causes image quality decrease because of aberration.
According to the present invention, a kind of electronic image pickup device can be provided, it is owing to for example in shooting when action of carrying out time exposure, carry out suitable dust and remove action, thereby can not cause image quality decrease and eliminate useless power consumption.
Claims (5)
1. electronic image pickup device has:
Photographic optical system, its optical image to subject carries out imaging;
Image unit, it comprises the components of photo-electric conversion that are transformed into the signal of telecommunication by the optical image of above-mentioned photographic optical system imaging;
Optical element, it is configured between the above-mentioned photographic optical system and the above-mentioned components of photo-electric conversion, prevents that dust etc. is attached on the photoelectric conversion surface of the above-mentioned components of photo-electric conversion; And
Control unit, it makes above-mentioned optical element carry out dust to remove action by above-mentioned optical element is vibrated with assigned frequency;
It is characterized in that,
Above-mentioned control unit with the shooting of above-mentioned image unit action associated the 1st regularly, above-mentioned optical element is vibrated with the 1st vibration mode, in the 2nd timing except the shooting action of above-mentioned image unit, above-mentioned optical element is vibrated with the 2nd vibration mode simultaneously;
The above-mentioned the 1st regularly is meant: with the corresponding timing of beginning of the shooting action of above-mentioned image unit;
The above-mentioned the 2nd regularly is meant: the timing corresponding with the replacing of above-mentioned photographic optical system;
Above-mentioned the 1st vibration mode is meant: above-mentioned optical element is with the vibration mode of the frequency vibration beyond its resonance frequency;
Above-mentioned the 2nd vibration mode is meant: above-mentioned optical element is with the vibration mode of its resonance frequency vibration.
2. electronic image pickup device according to claim 1 is characterized in that, above-mentioned electronic image pickup device has the pattern that makes above-mentioned optical element vibration according to manual operation, in this pattern, above-mentioned optical element is vibrated with above-mentioned the 2nd vibration mode.
3. electronic image pickup device according to claim 1 is characterized in that, above-mentioned the 1st vibration mode is the vibration mode that makes above-mentioned optical element intermittent control shaking.
4. electronic image pickup device according to claim 1 is characterized in that, above-mentioned the 1st vibration mode is to make above-mentioned optical element produce the vibration mode of row ripple.
5. electronic image pickup device according to claim 1 is characterized in that, above-mentioned the 1st vibration mode of execution in aperture time moves more than or equal to the shooting of setting or in the photography of B door.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003054642A JP4098120B2 (en) | 2003-02-28 | 2003-02-28 | Electronic imaging device |
| JP054642/2003 | 2003-02-28 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101427940A Division CN100471236C (en) | 2003-02-28 | 2004-02-27 | Imager apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1525741A CN1525741A (en) | 2004-09-01 |
| CN1292583C true CN1292583C (en) | 2006-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100060719A Expired - Fee Related CN1292583C (en) | 2003-02-28 | 2004-02-27 | Electronic image pickup device |
| CNB2006101427940A Expired - Fee Related CN100471236C (en) | 2003-02-28 | 2004-02-27 | Imager apparatus |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101427940A Expired - Fee Related CN100471236C (en) | 2003-02-28 | 2004-02-27 | Imager apparatus |
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| Country | Link |
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| JP (1) | JP4098120B2 (en) |
| CN (2) | CN1292583C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4756950B2 (en) * | 2005-08-08 | 2011-08-24 | キヤノン株式会社 | Imaging apparatus and control method thereof |
| JP4702954B2 (en) | 2006-03-09 | 2011-06-15 | キヤノン株式会社 | Imaging device |
| JP4942155B2 (en) * | 2006-04-18 | 2012-05-30 | キヤノン株式会社 | Optical device and control method of optical device |
| JP4817981B2 (en) * | 2006-06-19 | 2011-11-16 | キヤノン株式会社 | Imaging device |
| JP5058613B2 (en) | 2007-01-23 | 2012-10-24 | キヤノン株式会社 | Imaging device |
| JP5150308B2 (en) * | 2007-03-13 | 2013-02-20 | ペンタックスリコーイメージング株式会社 | Image blur correction device |
| JP2009251491A (en) * | 2008-04-10 | 2009-10-29 | Olympus Imaging Corp | Imaging apparatus and control method for imaging apparatus |
| JP4648986B2 (en) * | 2008-12-26 | 2011-03-09 | オリンパスイメージング株式会社 | Vibrating device and imaging device using the same |
| JP5444751B2 (en) * | 2009-02-19 | 2014-03-19 | 株式会社ニコン | Imaging device |
| JP5439272B2 (en) * | 2010-04-26 | 2014-03-12 | オリンパスイメージング株式会社 | Vibrating device and imaging device using the same |
| JP5051934B2 (en) * | 2010-08-31 | 2012-10-17 | キヤノン株式会社 | Imaging apparatus and control method thereof |
| JP2017170303A (en) * | 2016-03-22 | 2017-09-28 | オリンパス株式会社 | Droplet removal device, imaging device having droplet removal device, control method of droplet removal device, and control program of droplet removal device |
-
2003
- 2003-02-28 JP JP2003054642A patent/JP4098120B2/en not_active Expired - Fee Related
-
2004
- 2004-02-27 CN CNB2004100060719A patent/CN1292583C/en not_active Expired - Fee Related
- 2004-02-27 CN CNB2006101427940A patent/CN100471236C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP4098120B2 (en) | 2008-06-11 |
| CN1941848A (en) | 2007-04-04 |
| CN100471236C (en) | 2009-03-18 |
| JP2004264580A (en) | 2004-09-24 |
| CN1525741A (en) | 2004-09-01 |
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