CN100337157C - Electronic imaging device - Google Patents

Abstract

Provided is an electronic imaging unit capable of carrying out a dust-proof operation without a user for hearing a sound produced from a camera when a silent operation mode is set. The electronic imaging unit having the silent operation mode wherein production of sound related to imaging operations is suppressed, includes: an imaging optical system 12a for forming the optical image of an object; an imaging element 27 for converting the optical image formed by the imaging optical system 12a into an electric signal; a dust-proof filter 21 located between the imaging optical system 12a and the imaging element 27 to prevent dust or the like from depositing onto the photoelectric conversion face of the imaging element 27; and a body control microcomputer 150 for vibrating the dust-proof filter 21 at a prescribed frequency to make the dust-proof filter 21 perform dust removal operations, and the microcomputer 150 vibrates the dust-proof filter 21 depending on a different vibration form in accordance with a state as to whether or not the quiet sound operating mode is set.

Description

Electronic image pickup device

Technical field

The present invention relates to electronic image pickup device, for example relate in particular to, have the electronic image pickup device of the dust reduction capability of the dust that adheres on the component parts that can remove camera arrangement etc.

Background technology

At present, as an example of the technology relevant, the cover glass (dustproof glass) by the vibration protection imaging apparatus is arranged, the technology of removing the dust that adheres on this cover glass with the dust reduction capability of optical devices.For example, the spy opens the parts of having put down in writing among the 2002-204379 as vibration protection glass, uses the technology of piezoelectric element.The voltage that this piezoelectric element response is applied in stretches, and with 1 cycle of regulation cover glass is executed and is shaken.

But, there are various photograph modes in the camera arrangement, there is the requirement suppress the sound that the camera in each shooting action sends as far as possible.In order to satisfy such requirement, proposed to have the camera arrangement of the pattern (hereinafter referred to as quiet pattern) that can undisturbedly carry out the shooting action.

Under quiet pattern, do not carry out the action of being undertaken by sound of informing to the user.And to consider mechanicalness noise etc. does not take place when the driving of the mechanism components of carrying out camera as far as possible.

But, as long as shake in order except that dust dustproof glass to be executed, will sound take place by air vibration.If this frequency of executing the sound that takes place when shaking can listened wave band, then the user just can hear this sound.When being provided with quiet pattern, do not wish to take place such sound.

Summary of the invention

The present invention produces in order to solve such problem, its purpose is, a kind of electronic image pickup device is provided, it is when having set quiet pattern, can make the user can't hear sound that camera takes place and the action of making a video recording, especially, when having set quiet pattern, can make the user can't hear the generation sound of camera and the action of preventing dust.

To achieve the above object, electronic image pickup device of the present invention has: photographic optical system, the optical image of the body that is taken is carried out imaging; Photoelectric conversion part will convert electric signal to by the optical image of described photographic optical system imaging; Dustproof filter is configured between described photographic optical system and the described photoelectric conversion part, prevents to adhere to dust etc. on the photoelectric conversion surface of described photoelectric conversion part; Control assembly by the described dustproof filter of frequency vibration in accordance with regulations, makes described dustproof filter carry out dust and removes action, it is characterized in that: described control assembly vibrates described dustproof filter according to whether having selected quiet pattern with different mode of vibrations.

It is desirable to, described control assembly vibrates described dustproof filter according to whether having selected quiet pattern with different driving frequencies.And described control assembly is compared with the situation of not selecting described quiet pattern when having selected quiet pattern, vibrates described dustproof filter with high driving frequency.And described control assembly also can vibrate described dustproof filter with the driving frequency that audible sound does not take place when having selected quiet pattern.And described control assembly makes described dustproof filter that row ripple (progressivewave) take place according to whether having selected quiet pattern, perhaps makes described dustproof filter generation standing wave (standing wave).In addition, described dustproof filter has a plurality of piezoelectric elements, described control assembly is when having selected quiet pattern, described a plurality of piezoelectric elements are applied the driving voltage of out of phase, when not selecting described quiet pattern, described a plurality of piezoelectric elements are applied the driving voltage of same phase (inphase).

In addition, other electronic image pickup device of the present invention has: photographic optical system, the optical image of the body that is taken is carried out imaging; Photoelectric conversion part will convert electric signal to by the optical image of described photographic optical system imaging; Dustproof filter is configured between described photographic optical system and the described photoelectric conversion part, prevents to adhere to dust etc. on the photoelectric conversion surface of described photoelectric conversion part; Control assembly, by the described dustproof filter of frequency vibration in accordance with regulations, make described dustproof filter carry out dust and remove action, whether described control assembly basis has selected quiet pattern, carry out the dust of described dustproof filter and remove action, forbid that perhaps the dust of described dustproof filter is removed action.

In addition, other electronic image pickup device of the present invention has: photographic optical system, the optical image of the body that is taken is carried out imaging; Photoelectric conversion part converts described optical image to electric signal; Dustproof filter, be configured between described photographic optical system and the described photoelectric conversion part, can vibrate with setting cycle, described electronic image pickup device is characterised in that: described electronic image pickup device has control assembly, its vibration to described dustproof filter is controlled, make the described dustproof filter can be the 1st mode of vibration of audible sound (audible sound) taking place in when vibration and compare the 2nd little mode of vibration of audible sound with described the 1st mode of vibration and vibrate, wherein said the 2nd mode of vibration be the mode of vibration of carrying out when described electronic image pickup device is set to silent mode.

And described the 1st mode of vibration is the mode of vibration that makes described dustproof filter generation standing wave, and described the 2nd mode of vibration is to make described dustproof filter that the mode of vibration of row ripple take place.

And also can be formed in described the 1st mode of vibration is with the described dustproof filter of the 1st frequency vibration, is with the described dustproof filter of the 2nd frequency vibration that is higher than described the 1st frequency in described the 2nd mode of vibration.

Other electronic image pickup device of the present invention has: photographic optical system, the optical image of the body that is taken is carried out imaging; Photoelectric conversion part converts described optical image to electric signal; Dustproof glass is configured between described photographic optical system and the described photoelectric conversion part; A plurality of piezoelectric elements are configured in the circumference of described dustproof glass; Drive control component, described a plurality of piezoelectric elements are applied periodic drive voltage, vibration by consequent described piezoelectric element, make described dustproof glass generation vibration wave, described drive control component can reach the described a plurality of piezoelectric elements of the 2nd frequency drives that audible sound does not take place so that the 1st frequency of the vibration of audible sound takes place described dustproof glass, described electronic image pickup device has quiet pattern, described drive control component is when described quiet pattern, with the described a plurality of piezoelectric elements of described the 2nd frequency drives.

It is desirable to described the 1st frequency height of described the 2nd frequency ratio.

Other electronic image pickup device of the present invention has: photographic optical system, the optical image of the body that is taken is carried out imaging; Photoelectric conversion part converts described optical image to electric signal; Dustproof glass is configured between described photographic optical system and the described photoelectric conversion part; A plurality of piezoelectric elements are configured in the circumference of described dustproof glass; Drive control component applies periodic drive voltage to described a plurality of piezoelectric elements, by the vibration of consequent described piezoelectric element, makes described dustproof glass generation vibration wave; Set parts is used for selecting to set common pattern and quiet pattern, and described drive control component makes described dustproof glass generation standing wave under described common pattern, under described quiet pattern, makes described dustproof glass that the row ripple take place.

It is desirable to, described drive control component applies the driving voltage of same phase to described a plurality of piezoelectric elements under described common pattern, under described quiet pattern, described a plurality of piezoelectric elements are applied the driving voltage of out of phase.

Other electronic image pickup device of the present invention has: photographic optical system, the optical image of the body that is taken is carried out imaging; Photoelectric conversion part converts described optical image to electric signal; Dustproof filter is configured between described photographic optical system and the described photoelectric conversion part, can vibrate with setting cycle; The vibration control parts in the moment before the shooting action, vibrate described dustproof filter; Set parts is used for select setting common pattern and quiet pattern, when having set described quiet pattern, and the vibration action of forbidding described dustproof filter.

It is desirable to, described electronic image pickup device is a kind of camera head of single-lens reflex, also have: quick return mirror, it can be set at the 2nd position that described optical image is imported the 1st position of viewing optical system and described optical image imported described photoelectric conversion part; When having set described quiet pattern, by described quick return mirror being set to the vibration action that described dustproof filter is forbidden in described the 2nd position.

Description of drawings

Fig. 1 is the stereographic map of partial cut of the schematic configuration of the example of expression when the present invention is applicable to digital camera.

Fig. 2 is the block diagram of system architecture of the camera of an expression example of the present invention.

Fig. 3 takes out the figure that the part of the image unit 15 in the camera 1 of this example is represented, is that the major part exploded perspective view that this image unit 15 is represented is decomposed in expression.

Fig. 4 takes out the figure that the part of the image unit 15 in the camera 1 of this example is represented, is to disconnect the stereographic map that the part of this image unit assembled state is represented.

Fig. 5 takes out the figure that the part of the image unit 15 in the camera 1 of this example is represented, is the cut-open view along the section of Fig. 4.

Fig. 6 only takes out dustproof filter 21 and the go forward side by side front view of line display of the piezoelectric element 22 that is wholely set with it from the image unit 15 of camera 1.

The dustproof filter 21 when Fig. 7 represents that the piezoelectric element 22 to Fig. 6 has applied periodic drive voltage and the state variation of piezoelectric element 22 are the cut-open views along the A-A line of Fig. 6.

The dustproof filter 21 when Fig. 8 represents that the piezoelectric element 22 to Fig. 6 has applied periodic drive voltage and the state variation of piezoelectric element 22 are the cut-open views along the B-B line of Fig. 6.

Fig. 9 and Fig. 6 are same, are only to take out dustproof filter 21 and the go forward side by side front view of line display of the piezoelectric element 22 that is wholely set with it from the image unit 15 of camera 1.

The dustproof filter 21 when Figure 10 represents that the piezoelectric element 22 to Fig. 9 has applied the periodic voltage that is used to take place secondary vibration and the state variation of piezoelectric element 22 are the cut-open views along the A-A line of Fig. 9.

The dustproof filter 21 when Figure 11 represents that the piezoelectric element 22 to Fig. 9 has applied the periodic voltage that is used to take place secondary vibration and the state variation of piezoelectric element 22 are the cut-open views along the B-B line of Fig. 9.

Figure 12 is the structure of executing the parts that shake of shaking is executed in expression to the dustproof filter in the image unit in this electronic image pickup device a concept map.

Figure 13 is the figure of the appearance of the curvilinear rows ripple vibration that takes place in the dustproof filter 21 of expression (peak Y and paddy T be mutual uniformly-spaced, etc. the vibration of amplitude ground generation).

Figure 14 is the circuit diagram of the dustproof filter driving circuit 140 in this electronic image pickup device 1 of summary presentation graphs 2 explanation.

Figure 15 is the sequential chart of form of each signal of each component parts output in the dustproof filter driving circuit 140 of expression Figure 14.

Figure 16 is the process flow diagram of the action of the Bucom150 in the camera arrangement of explanation the present invention the 1st embodiment.

Figure 17 is the process flow diagram of the action of the Bucom150 in the camera arrangement of explanation the present invention the 2nd embodiment.

Figure 18 is the process flow diagram of the action of the Bucom150 in the camera arrangement of explanation the present invention the 3rd embodiment.

Embodiment

Below, with reference to figure, describe with regard to example of the present invention.

Fig. 1 is the stereographic map of partial cut of the schematic configuration of the example of expression when the present invention is applicable to digital camera.

That is, Fig. 1 is the part that expression disconnects camera body, and the stereographic map of its inner structure represented in summary.

The camera 1 of this example is made of camera body portion 11 that constitutes respectively and camera lens mirror bucket 12, and this camera body portion 11 and camera lens mirror bucket 12 are mutually can disassembled and assembled freely.

And, the photographic optical system 12a that camera lens mirror bucket 12 is made of a plurality of lens and drives structure thereof etc. in the inside maintenance.

This photographic optical system 12a is used for by the light beam from the body that is taken is seen through, the image of the body that is taken that the light beam that is taken by this is formed in the position (photoelectric conversion surface of imaging apparatus described later) of stipulating carries out imaging, for example, constitute by a plurality of optical lenses etc.

This camera lens mirror bucket 12 is configured in the front of camera body portion 11, and is outstanding forward.

In addition, camera body portion 11 is so-called single-lens reflex cameras, it has various component parts etc. in inside, and, has photographic optical system installation portion 11a in its front, this photographic optical system installation portion 11a is a kind of binding parts, and it is used for and can disposes the camera lens mirror bucket 12 that keeps photographic optical system 12a in disassembled and assembled freely ground.

Promptly, opening is used in exposing near central portion formation of the front of camera body portion 11, the bore that this exposure has the regulation of the inside that the body light beam that is taken can be directed to this camera body portion 11 with opening is at this exposure formation photographic optical system installation portion 11a in the circumference of opening.

And, except the above-mentioned photographic optical system installation portion of the former configuration of this camera body portion 11 11a, the position configuration of regulation such as portion and back side portion is used for the various functional units of operate camera main part 11 in the above, for example, be used to begin the to make a video recording release-push 17 etc. of indicator signal of action.

Inside in this camera body portion 11, respectively the regulation position configuration various component parts, for example, viewfinder 13, it constitutes so-called viewing optical system; Shutter portion 14, it has the tripper etc. of irradiation time etc. of the body light beam that is taken of the photoelectric conversion surface that controls to imaging apparatus; Image unit 15, it comprises not shown imaging apparatus and dustproof filter (being also referred to as dustproof glass) 21 etc., this imaging apparatus body image image signals corresponding that obtains and be taken, the position of regulation of front that should dustproof filter 21 be configured in the photoelectric conversion surface of this imaging apparatus, the dust proof member of adhering to as the dust of this photoelectric conversion surface of prevention etc.; A plurality of circuit boards (having only main circuit board 16 to illustrate), its main circuit board 16 to have assembled the various electric parts that constitute circuit.

Viewfinder 13 is by constituting with lower member: quick return mirror 13b, and its crooked optical axis that sees through the body light beam that is taken of photographic optical system 12a is directed to viewing optical system with it; Pentaprism 13a, it accepts to form upright erect image from the light beam of this quick return mirror 13b ejaculation; Eyepiece 13c, it amplifies the picture that is formed by this pentaprism 13a, and formation is the image of the form of suitable observation.

Quick return mirror 13b constitutes between the position of the position of the optical axis that leaves photographic optical system 12a and the regulation on this optical axis with moving freely, be configured in the normal state, on the optical axis of photographic optical system 12a, form the angle of regulation, for example, have miter angle with this optical axis.

Like this, see through the body light beam that is taken of photographic optical system 12a, when this camera 1 is in common state, by complications, make it be reflected to the pentaprism 13a of the top that is configured in this quick return mirror 13b by its optical axis of quick return mirror 13b.

On the other hand, when this camera 1 was carried out the shooting action, this quick return mirror 13b moved to the position of the regulation of the optical axis that leaves photographic optical system 12a, and therefore, the body light beam that is taken is directed into imaging apparatus.

In addition, shutter portion 14 for example is suitable for, and the tripper of focussing plane mode and driving circuit thereof etc. are identical with the shutter of general using in the past the camera etc.

Fig. 2 is the block diagram of system architecture of the camera of expression the present invention one example.

That is, the camera arrangement of this example mainly constitutes by camera body 11 and as the camera lens mirror bucket 12 of changing camera lens, and in the front of camera body 11, camera lens mirror bucket 12 likely is installed in dismounting freely.

The control of camera lens mirror bucket 12 is carried out with microcomputer (hereinafter referred to as Lucom) 205 by camera 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, these Lucom205 and Bucom105 form the electrical connection that can communicate by letter by communications connector 206 when constituting combination.

And in this case, as camera arrangement, formation makes Lucom205 be subordinated to the structure that Bucom150 carries out concerted action.

In addition, in camera lens mirror bucket 12, be provided with photographic optical system 12a and aperture 203.

This photographic optical system 12 is by the not shown DC motor-driven in the lens driving mechanism 202.

In addition, aperture 203 is by the not shown step motor drive in the aperture driving mechanism 204.

Lucom205 controls these motors according to the instruction from Bucom150.

And, in this camera body 11, disposed following component parts as figure.

For example, be provided with component parts (pentaprism 13a, quick return mirror 13b, eyepiece 13c, secondary reflective mirror 114) as the single-lens reflex of optical system; The shutter 115 of the focussing plane formula on the optical axis; Be used to receive folded light beam, carry out the AF sensor unit 116 of automatic range from above-mentioned secondary reflective mirror 14.

In addition, be provided with: AF sensor drive driving circuit 117, the above-mentioned AF sensor unit 116 of its drive controlling as lower member; Reflective mirror driving mechanism 118, the above-mentioned quick return mirror 13b of its drive controlling; Shutter accumulating mechanism 119, it is used for replenishing the curtain earlier of the above-mentioned shutter 115 of driving and the spring force of back curtain; Shutter control circuit 120, it controls the action of these elder generation's curtains and back curtain; Light measuring circuit 121, it carries out photometry and handles according to the light beam from above-mentioned pentaprism 13a.

On optical axis, be provided with imaging apparatus 27 as photo-electric conversion element, it is used for the body image that is taken by above-mentioned optical system is carried out opto-electronic conversion.

At this moment, this imaging apparatus 27 is protected by dustproof filter 21, and this dustproof filter 21 is made of the transparent glass component as optics that is configured between this imaging apparatus 27 and the photographic optical system 12a.

And, as this dustproof filter 21 being executed a part of executing the parts that shake of shaking, for example, piezoelectric element 22 has been installed at the circumference of this dustproof filter 21 with the frequency of regulation.

In addition, piezoelectric element 22 has 2 electrodes, and this piezoelectric element 22 is removed the dust that its glass surface adheres to by vibrating as 140 pairs of dustproof filters 21 of dustproof filter driving circuit of executing the part of the parts that shake.

In addition, for the temperature of the periphery of measuring imaging apparatus 27, nearby be provided with temperature measuring circuit 133 at dustproof filter 21.

In this camera arrangement, also be provided with the interface circuit 123 that is connected to imaging apparatus 27; LCD monitor 124; SDRAM125 as the storage area setting; Utilize FlashROM126 and storage medium 127 etc. to carry out the image process controller 128 of Flame Image Process, can when the electro-photographic function is provided, provide electronics storage Presentation Function.

As other storage area, control the non-volatile memory component of the controlled variable of necessary regulation as storing camera, for example, be provided with the nonvolatile memory 129 that constitutes by EEPROM, it can conduct interviews from Bucom150.

In addition, be provided with action demonstration LCD151 in Bucom150, it informs the operating state of this camera by showing output to the user; Camera operation switch (switch) 152.

Above-mentioned camera operation switch 152 comprises, for example, is used for lens switch, mode altering switch and power switch etc. are operated the switches set of necessary action button to this camera.

Also be provided with as lower member: as the battery 154 of power supply; Power circuit 153, it is converted to the necessary voltage of each circuit unit that constitutes this camera arrangement with this power source voltage, and supplies with.

Below, just the action of the camera arrangement that constitutes as mentioned above describes.At first, image process controller 128 is according to the instruction of Bucom150, and control interface circuit 123 obtains view data from imaging apparatus 27.

This view data is converted to vision signal by image process controller 128, shows by LCD monitor 124 outputs.

The user can confirm the image of photography according to the display image of this LCD monitor 124.

SDRAM125 is that the interim keeping of view data is used storer, the workspace when being used for the view data conversion etc.

In addition, this view data is set at after being converted to jpeg data, takes care of in storage medium 127.

Imaging apparatus 27 is protected by the dustproof filter 21 that transparent glass component constitutes in a manner described.

Circumference that should dustproof filter 21 has disposed the piezoelectric element 22 that is used to vibrate this glass, and this piezoelectric element 22 is by the mode that specifies later, is driven by the also dustproof filter driving circuit 140 as the driver part work of this piezoelectric element 22.

Imaging apparatus 27 and piezoelectric element 22 are housed in dustproof filter 21 as one side by one, and in the casing that surrounds of the framework that is illustrated by the broken lines, help preventing dust.

Usually,, make one of major reason that its natural vibration frequency changes because temperature is the elasticity coefficient that influence parts of glass, so, during utilization, must its temperature of measurement, consider the variation of its natural vibration frequency.

Preferably measure the temperature variation of the dustproof filter 21 that is provided with for the front of the imaging apparatus 27 that the temperature rising is fast in the protection work, prediction natural vibration frequency at this moment.

Therefore, in this routine situation, in order to measure the peripheral temperature of imaging apparatus 27, be provided with the sensor (not shown) that is connected to said temperature mensuration circuit 133.

In addition, the measuring point for the temperature of this sensor will be set in the position of the vibration plane of very approaching dustproof filter 21.

Reflective mirror driving mechanism 118 is to be used for quick return mirror 13b is driven into the mechanism of turning over position and lowering position, this quick return mirror 13b is cut apart from the light beam of photographic optical system 12a and to be directed to AF sensor unit 116 and pentaprism 13a when lowering position.

The output of the AF sensor in the AF sensor unit 116 sends to Bucom150 by AF sensor drive driving circuit 117, carries out well-known range finding and handles.

In addition, by with the eyepiece 13c of pentaprism 13a adjacency, the user can visually see the body that is taken, on the other hand, the part of the light beam by this pentaprism 13a is directed into the photoelectric sensor (not shown) in the light measuring circuit 121, according in this detected light quantity, carry out well-known photometry and handle.

Below, be elaborated with regard to the image unit 15 in the camera 1 of this example.

Fig. 3,4, the 5th, a part of taking out the image unit 15 in the camera 1 of this example figure of line display that goes forward side by side, Fig. 3 decomposes the go forward side by side major part exploded perspective view of line display of this image unit.

In addition, Fig. 4 is the go forward side by side stereographic map of line display of the part that disconnects this image unit assembled state, and Fig. 5 is the cut-open view along the section of Fig. 4.

In addition, the image unit 15 of the camera 1 of this example is the unit that is made of a plurality of parts that comprise shutter portion 14 as mentioned above, and Fig. 3 to Fig. 5 just illustrates its main portion, has omitted the diagram about shutter portion 14.

In addition, in order to represent the position relation of each component parts, in Fig. 3 to Fig. 5, contrast main circuit board 16 illustrates, this main circuit board 16 be arranged on this image unit 15 near, when having assembled imaging apparatus 27, assembled the electric circuit of the camera system that constitutes by imaging signal processing circuit and working storage etc.

In addition, about the detailed content of this main circuit board 16 itself, be suitable for present camera etc. in the content of general using, omit its explanation.

Image unit 15 is by constituting as lower member: imaging apparatus 27, and it is made of CCD etc., obtains and the picture signal that sees through the photophase on the photoelectric conversion surface that photographic optical system 12a shines oneself; Imaging apparatus fixed head 28, it is made of the fixing laminal parts of this imaging apparatus 27 of supporting; Optics low pass filter (Low Pass Filter :) 25 hereinafter referred to as optics LPF, the photoelectric conversion surface that it is arranged on imaging apparatus 27 is the optical element that forms in order to remove radio-frequency component from the body light beam that is taken that sees through photographic optical system 12a irradiation; Low pass filter holding components 26, it is configured in the circumference between this optics LPT25 and the imaging apparatus 27, is formed by elastomeric element that slightly is the shaped as frame shape etc.; Imaging apparatus is accommodated box part 24 (hereinafter referred to as CCD case 24), its configuration mode is when accommodating imaging apparatus 27 and fixing maintenance, with optics LPF25 (optical element) close attachment in its peripheral part to its position nearby, and support, and the position of regulation is closely contacted with dustproof filter holding components 23 described later; Dustproof filter holding components 23, it is configured in the front of this CCD case 24, and filter 21 close attachment of will preventing dust, and are supported to its position nearby in its peripheral part; Dustproof filter 21, it is supported by this dustproof filter holding components 23, is the photoelectric conversion surface of imaging apparatus 27, is in the front of optics LPF25, is configured in the dust proof member of position of the regulation at the interval that has regulation between this optics LPF25 relatively; Piezoelectric element 22, the circumference that it is configured in this dustproof filter 21, be used for to this dustproof filter 21 apply regulation vibration execute the parts that shake, for example, constitute by electromechanical conversion element etc.; By giving as security parts 20, it is by being used for that 21 pairs of dustproof filter holding componentss 23 of dustproof filter are carried out sealed engagement, and the fixing elastic body formation that keeps.

The photoelectric conversion surface of imaging apparatus 27 usefulness oneself accepts to see through the body light beam that is taken of photographic optical system 12a, carrying out opto-electronic conversion handles, by such processing, obtain with this photoelectric conversion surface in the body image image signals corresponding that is taken that forms, for example, use charge coupled cell (CCD:Charge Coupled Device).

This imaging apparatus 27 is assemblied in the position of the regulation on the main circuit board 16 by imaging apparatus fixed head 28.

Assembled imaging signal processing circuit and working storage etc. as mentioned above in this main circuit board 16, these circuit, handled from the signal of imaging apparatus 27 outputs.

In the front face side of imaging apparatus 27, clip low pass filter holding components 26, disposed optics LPF25.

And, to cover the mode of these imaging apparatuss 27, low pass filter holding components 26, optics LPF25, disposed CCD case 24.

That is, in CCD case 24,, in this opening 24c, optics LPF25 and imaging apparatus 27 have been disposed from its rear at the opening 24c that is provided with rectangular shaped near middle body.

In the inner peripheral portion at the rear of this opening 24c,, form the end difference 24a that section slightly is the L word shape as Fig. 4, shown in Figure 5.

As mentioned above, between optics LPF25 and imaging apparatus 27, disposed the low pass filter holding components 26 that constitutes by elastomeric element etc.

This low pass filter holding components 26 is configured in the position of the effective range of avoiding its photoelectric conversion surface at the circumference of the front of imaging apparatus 27, and nearby joins with the circumference at the back side of optics LPF25.

And, make between optics LPF25 and the imaging apparatus 27 to keep near sealing.

Like this, form the elastic force on optical axis direction that acts on by low pass filter holding components 26 for optics LPF25.

Like this, by carry out disposing the circumference of the front of optics LPF25 with end difference 24a near the mode of the contact that seals to CCD case 24, antagonism is indexed to the elastic force of low pass filter holding components 26 effect of its optical axis direction with this optics LPF25, stipulates the position on the optical axis direction of this optics LPF25.

In other words, insert the end difference 24a of optics LPF25 by CCD case 24 of inside of the opening 24c of CCD case 24 from the back side, the position on the regulation optical axis direction.

Like this, make this optics LPF25 can not be shed to the outside to front face side from the inside of CCD case 24.

Like this, optics LPF25 is behind the inside of the opening 24c of back side insertion CCD case 24, at the back side of optics LPF25 configuration imaging apparatus 27.

At this moment, between optics LPF25 and imaging apparatus 27, at circumference clamping low pass filter holding components 26.

In addition, imaging apparatus 27 clips imaging apparatus fixed head 28 as mentioned above, is assembled to main circuit board 16.

Then, the back side of imaging apparatus fixed head 28 from CCD case 24 is fixed on the screw 24e by pad 28a with screw 28b.

In addition, in imaging apparatus fixed head 28, main circuit board 16 is by pad 16c, and 16d fixes by screw.

In the front face side of CCD case 24, dustproof filter holding components 23 usefulness screw 23b are fixed on the screw 24b of CCD case 24.

At this moment, on the position of the regulation of the front face side of the peripheral side of CCD case 24, as the concrete expression of Fig. 4, Fig. 5 like that, formation is in the form of a ring all mortise 24d roughly.

On the other hand, on the position of the regulation of the rear side of the peripheral side of dustproof filter holding components 23, around forming roughly in the form of a ring and the corresponding annular convex 23d of all mortise 24d CCD case 24 (not shown among Fig. 3) week.

Therefore, undertaken chimericly by annular convex 23d and all mortise 24d, CCD case 24 and dustproof filter holding components 23 promptly, form the zone of all mortise 24d and annular convex 23d at annular section, approaching mutually carry out hermetically chimeric.

Dustproof filter 21 is whole to be formed circularly or polygonal tabular, and the zone that mind-set radiation direction has an area of regulation from oneself forms hyalomere at least, and this hyalomere disposes relatively at the interval that the front face side of optics LPF25 has regulation.

In addition, at the face on one side of dustproof filter 21 (in this example, be rear side) circumference on, in the mode that becomes one, disposed piezoelectric element 22 by for example using bonding agent to carry out method such as bonding, this piezoelectric element 22 is the executing to shake and use parts of regulation that are used for this dustproof filter 21 is applied vibration, is formed by electromechanical conversion element etc.

This piezoelectric element 22 can make dustproof filter 21 that the vibration of regulation take place by apply the driving voltage of regulation from the outside.

Then, dustproof filter 21 is fixed maintenance by what be made of elastic bodys such as flat springs by giving as security parts 20 by the mode to dustproof filter holding components 23 sealed engagement.

In the position near central portion of dustproof filter holding components 23, be provided with circular or polygonal opening 23f.

The size of this opening 23f is set at, and the body light beam that is taken through photographic optical system 12a is passed through, and satisfies the required sufficient size of photoelectric conversion surface of the imaging apparatus 27 of its rear configuration of this light beam irradiates.

In the circumference of this opening 23f, slightly form the side-prominent 23e of wall portion (with reference to Fig. 4, Fig. 5) of face forward in the form of a ring, in the front of the 23e of this wall portion, form further to the side-prominent 23c of support sector in front.

On the other hand, near the outer peripheral edges portion of the front face side of dustproof filter holding components 23, form a plurality of (in this example, being 3 places) to the side-prominent protruding part 23a in front in the position of regulation.

This protruding part 23a fixes the position that forms by giving as security parts 20 that keeps in order to fixedly install to dustproof filter 21, and on the leading section of protruding part 23a, the link of use screw 20a etc. fixedly installs this by giving as security parts 20.

By giving as security parts 20 are aforesaid parts that formed by elastic bodys such as flat springs, be fixed on protruding part 23a by its base end part, free end leans in the outer peripheral edges portion of dustproof filter 21, and the filter 21 that should prevent dust is to dustproof filter holding components 23 ends, that is, optical axis direction is by giving as security.

At this moment, the position of the regulation of the piezoelectric element 22 that disposes in the outer peripheral edges portion at the back side by making dustproof filter 21 leans the 23c of support sector, has stipulated the position on optical axis direction of dustproof filter 21 and piezoelectric element 22.

Like this, dustproof filter 21 is fixed to be held in by piezoelectric element 22 and engages with dustproof filter holding components 23 formation sealings.

In other words, dustproof filter holding components 23 forms sealing with dustproof filter 21 by piezoelectric element 22 and engages by by the acting force of giving as security parts 20.

But, as mentioned above, dustproof filter holding components 23 and CCD case 24 all mortise 24d and annular convex 23d (with reference to Fig. 4, Fig. 5) approaching mutually chimeric hermetically in, dustproof filter holding components 23 passes through to form the sealed engagement of clamping piezoelectric element 22 by the acting force of giving as security parts 20 with dustproof filter 21.

In addition, the optics LPF25 that disposes in the CCD case 24 is configured to form near sealing between the end difference 24a of the circumference of the front face side of this optics LPF25 and CCD case 24.

And then in the rear side of optics LPF, imaging apparatus 27 is configured by low pass filter holding components 26, between optics LPF25 and imaging apparatus 27, also keeps near sealing.

Like this, between optics LPF25 and dustproof filter 21 relative to the space in, formed the space part 51a of regulation.

In addition, by the peripheral side of optics LPF25, that is, CCD case 24, dustproof filter holding components 23 and dustproof filter 21 form spatial portion 51b.

This spatial portion 51b is the sealed space (with reference to Fig. 4, Fig. 5) that the mode with the outside that is projected into optics LPF25 forms.

In addition, this spatial portion 51b is set at bigger than the space of space part 51a.

And, by the space that space part 51a and spatial portion 51b form, as mentioned above, be by CCD case 24, dustproof filter holding components 23, dustproof filter 21 and the formed seal cavity 51 of optics LPF25 near sealing.

Like this, in the image unit 15 in the camera of this example, constitute hermetically-sealed construction portion, its formation is included in optics LPF25 and the seal cavity 51 near sealing of the space part 51a that the periphery of the filter 21 that prevents dust forms.

And the sealing structural portion is arranged on the periphery of optics LPF25 to its outer fix nearby.

And then, in this example, by constitute seal construction portion as lower member etc.: dustproof filter holding components 23, its be with dustproof filter 21 close attachment in its peripheral part to position near it, and the 1st parts of supporting; CCD case 24, its be with optics LPF25 close attachment in its peripheral part to its position nearby, and when supporting, at the position and dustproof filter holding components 23 tight the 2nd parts that dispose that contact of own regulation.

In the camera of this example that as above constitutes, the dustproof filter 21 of configuration relatively in the position of the regulation of the front face side of imaging apparatus 27, the seal cavity 51 that sealing is formed by the periphery of the photoelectric conversion surface of imaging apparatus 27 and dustproof filter 21, by such structure, adhere to dust on the photoelectric conversion surface of advance preventing imaging apparatus 27.

And, at this moment, for dustproof filter 21 front face side expose dust that face adheres to etc., by the piezoelectric element 22 with the circumference one configuration of this dustproof filter 21 is applied periodic voltage, dustproof filter 21 is applied the vibration of regulation, can remove.

At this, describe with regard to the vibration of removing action as the dust of dustproof filter 21.Fig. 6 only takes out dustproof filter 21 and front view that the piezoelectric element 22 that is wholely set is with it represented from the image unit 15 of camera 1.

In addition, the dustproof filter 21 when Fig. 7 and Fig. 8 represent that the piezoelectric element 22 to Fig. 6 has applied periodic drive voltage and the state variation of piezoelectric element 22, Fig. 7 is the cut-open view along the A-A line of Fig. 6.Fig. 8 is the cut-open view along the B-B line of Fig. 6.

For example, when piezoelectric element 22 was applied negative (negative :) voltage, dustproof filter 21 was in Fig. 7, Fig. 8, be out of shape by the mode shown in the solid line, on the other hand, when piezoelectric element 22 is just being applied (just :+) voltage, dustproof filter 21 is out of shape by the mode shown in the dotted line in the figure.

At this moment, in the position of the joint of the vibration shown in the symbol 21a of Fig. 6～Fig. 8, because amplitude is zero in fact, so the 23c of support sector that is set at dustproof filter holding components 23 is connected to the corresponding position with this joint 21a.Like this, can support dustproof filter 21 effectively, and not hinder vibration.And under this state, by piezoelectric element 22 is applied periodic voltage, dustproof filter 21 vibrates, and removes the dust etc. of the surface attachment of this dustproof filter 21.

In addition, Ci Shi resonant frequency is by decisions such as the shape of dustproof filter 21 and thickness of slab materials.In the example of above-mentioned Fig. 6～shown in Figure 8, represented to take place the once situation of vibration.

In addition, in other the example shown in Fig. 9～Figure 11, expression to the appearance of the situation of the dustproof filter generation secondary vibration of the routine identical structure of Fig. 6～shown in Figure 8.

At this moment, Fig. 9 and Fig. 6 are same, are only to take out dustproof filter 21 and front view that the piezoelectric element 22 that is wholely set is with it represented from the image unit 15 of camera 1.

The dustproof filter 21 when Figure 10 and Figure 11 represent that the piezoelectric element 22 to Fig. 9 has applied the periodic voltage that is used to take place secondary vibration and the state variation of piezoelectric element 22, Figure 10 is the cut-open view along the A-A line of Fig. 9.Figure 11 is the cut-open view along the B-B line of Fig. 9.

For example, when piezoelectric element 22 was applied negative (negative:-) voltage, dustproof filter 21 was in Figure 10 and Figure 11, be out of shape by the mode shown in the solid line, on the other hand, when piezoelectric element 22 is just being applied (just :+) voltage, dustproof filter 21 is out of shape by the mode shown in the dotted line in figure.

At this moment, shown in symbol 21a, 21b among Fig. 9～Figure 11, in this vibration, there are two pairs of joints, touch the position corresponding by the 23c of support sector that is set at dustproof filter holding components 23 with saving 21a, same with the example of above-mentioned Fig. 6～shown in Figure 8, can support dustproof filter 21 effectively, and not hinder vibration.

Therefore, in such dust-proof mechanism, piezoelectric element 22 is applied periodic voltage by the moment, dustproof filter 21 is vibrated, can remove at the dust of these dustproof filter 21 surface attachment etc. in regulation.

Figure 12 is that expression is executed the concept map of executing the modular construction of shaking that shakes to the dustproof filter in the image unit of this electronic image pickup device.

As shown in figure 12, very 22a, 22b of the piezoelectric element of toroidal 22 minutes.At this moment, piezoelectric element 22a, 22b press thickness of slab direction split pole in be divided into 8 zone by circumferencial direction, divide extreme direction with just (+) and negative (-) expression, dividing the opposite zone of extreme direction to dispose alternately.And, a side piezoelectric element 22b is configured in the position that differs the quarter-wave (1/4 λ) of vibration wavelength (at this, 1 wavelength is equivalent to the just length in the split pole zone of (+), negative (-)) with respect to the opposing party's piezoelectric element 22a.

For piezoelectric element 22a, the 22b of such formation,, on thickness of slab direction separately, append the voltage of the frequency of regulation by dustproof filter driving circuit 140.

At this moment, the frequency signal (the 1st periodic voltage signal) of oscillator 34 outputs of dustproof filter driving circuit 140 is directly appended to piezoelectric element 22b, on the other hand, for piezoelectric element 22a, apply 90 ° of phase shifters 35 by dustproof filter driving circuit 48 by the signal of 90 ° of phase shifts (the 2nd periodic voltage signal).

By such signal being applied to each piezoelectric element 22a, 22b, dustproof filter 21 is shown in Figure 13 (only having shown dustproof filter 21), generation is an axle with the central part of dustproof filter 21, the curvilinear rows ripple vibration of advancing to sense of rotation X (peak Y and paddy T alternatively, uniformly-spaced, etc. the vibration of amplitude ground generation).

In addition, when seeing the curvilinear rows ripple that is taken place by piezoelectric element 22a, 22b at any time, the central part (optical axis) to dustproof filter 21 slightly is symmetric shape.

Figure 14 is the circuit diagram of the dustproof filter driving circuit 140 in this electronic image pickup device 1 of summary presentation graphs 2 explanation.Figure 15 is the sequential chart of each signal aspect of each component parts output in the dustproof filter driving circuit 140 of expression Figure 14.

Be provided with clock signal generator 255 in main body control with microcomputer 150 inside, this clock signal generator 255 is with the frequency output pulse signal (fundamental clock) fully faster than the signal frequency that will be applied to 22b (with reference to Sig1 shown in Figure 15).This basic clock signal is input to the N system counter 241 of dustproof filter driving circuit 140.N system counter 241 pulse signals are counted, and when the value that arrives regulation=N, just the output counting finishes pulse signal.That is, basic clock signal carries out frequency division (with reference to Sig2 shown in Figure 15) with 1/N.

Pulse signal behind the frequency division is not because the dutycycle of High and Low is 1: 1, so, by the one 1/2 frequency dividing circuit 242-1, be 1: 1 with duty cycle conversion.At this moment, frequency becomes half (with reference to Sig3 shown in Figure 15).The output signal of the one 1/2 frequency dividing circuit 242-1 outputs to the 2 1/2 frequency dividing circuit 242-2 and XOR (ExOR) circuit 247.Be input to the pulse signal of the 2 1/2 frequency dividing circuit 242-2, the frequency output (with reference to Sig4 shown in Figure 15) that reduces by half once more.

At this, under height (High) state of pulse signal Sig4, MOS transistor Q01 (244b1) becomes conducting (ON) state.And then pulse signal Sig4 is applied to MOS transistor Q02 (244c1) by the 1st phase inverter 243-1.At this moment, under pulse signal Sig4 low (Low) state, MOS transistor Q02 (244c1) becomes conducting (ON) state.

Like this, be connected 2 the MOS transistor Q01 (244b1) of primary side of transformer A (245-1) and Q02 (244c1) when becoming conducting state alternately, the signal of Sig5 as shown in figure 15 takes place at the out secondary of this transformer A (245-1).At this moment, the winding ratio of transformer A (245-1) is decided by the output voltage of power circuit 153 and the required voltage of piezoelectric element 22a that drives a side.

In addition, resistance R 00 (246-1) is provided with in order to flow through excessive electric current among the limiting transformer A (245-1).

When drive pressure electric device 22a, need Q00 (244a1) to become conducting (ON) state, and the center tap of 153 couples of transformer A of power circuit (245-1) has applied voltage.And in this case, the conducting of Q00 (244a1) or the control that ends are undertaken by the P_PwContA of main body control with microcomputer 150.

In addition, the setting value=N of N system counter 241 is provided with according to the port=D_NCnt of main body control with microcomputer 150.That is, main body control by control setting value=N, can change the driving frequency of piezoelectric element 22a, 22b with microcomputer 150 arbitrarily.

Driving frequency be calculated as follows formula (1).

fdrv＝fpls/4N ……(1)

Wherein, N: to the setting value of N system counter 241

Fpls: the frequency of the output pulse of clock signal generator 255

Fdrv: the frequency that is applied to the signal of piezoelectric element

Like this, piezoelectric element 22a is applied the drive signal (Sig5) of the voltage of regulation.

On the other hand, the output signal Sig3 of the one 1/2 frequency dividing circuit 242-1 outputs to the 3 1/2 frequency dividing circuit 242-3 through XOR (ExOR) circuit 247.At this moment, when main body control with the port P_ θ Cont of microcomputer 150 was high (High) state, pulse signal Sig3 reversed.Afterwards, output to the 3 1/2 frequency dividing circuit 243-3.

In addition, when port P_ θ Cont was low (Low) state, pulse signal Sig3 directly outputed to the 3 1/2 frequency dividing circuit 242-3 (with reference to Sig6 shown in Figure 15).This pulse signal Sig6 once more by the 3 1/2 frequency dividing circuit 242-3 with frequency halving after, output (with reference to Sig7 shown in Figure 15).By such mode, the 2nd phase inverter 243-2, Q11 (244b2), Q12 (244c2), transformer B (245-2) are driven, and piezoelectric element 22b are applied the drive signal (Sig8) of the voltage of regulation.

In addition, the 2nd phase inverter 243-2, Q11 (244b2), Q12 (244c2), transformer B (245-2), resistance R 10 function and above-mentioned the 1st phase inverter 243-1, Q01 (244b1), Q02 (244c1), transformer A (245-1), resistance R 00 (246-1) function separately separately is basic identical.

In addition, first～the 3 1/2 frequency dividing circuit 242-1,242-2,242-3 all be corresponding input pulse signal rising edge and carry out the frequency division action.

And, even the frequency of pulse signal is identical, when signal reverses, the pulse signal generation phase place that the 2 1/2 frequency dividing circuit 242-2 and the 3 1/2 frequency dividing circuit 242-3 export separately different.The phase differential of this moment is 90 °.

Therefore, be applied to the signal Sig5 of piezoelectric element 22a and be applied between the signal Sig8 of piezoelectric element 22b, 90 ° phase differential takes place.And this phase differential can be controlled by the port P_ θ Cont of main body control with microcomputer 150.For example, if port P_ θ Cont is high (High) state, 90 ° phase differential taking place then, if be low (Low) state, phase differential does not take place then.That is,, can apply the vibration of different modes to dustproof filter 21 by control port P_ θ Cont.

(the 1st embodiment)

Figure 16 is the process flow diagram of action of Bucom150 that is used for illustrating the camera arrangement of the 1st embodiment of the present invention.

When Bucom150 has carried out making operation at the power switch of camera, start working.In step S100, carry out the processing that is used to start this camera arrangement.Control power circuit 153 is to constituting each circuit unit supply capability of this camera arrangement.In addition, carry out the initial setting of each circuit.

Then, shown in step S101, step S102 and step S103, carry out the action that removes dust during power initiation.Because when power supply disconnects, (for example, the user carries out the replacing of phtographic lens etc.) for a certain reason, dust may be attached to dustproof filter 21.

In step S101, judge the state of the quiet pattern selector switch of one of camera operation switch 152.If quiet pattern selector switch is ON, then quiet pattern is selected, must suppress to be associated with shooting action and the various sound that take place.Therefore, at this, the shooting of slowing down is if any moved, and also will reduce the responsiveness of driver, suppresses mechanicalness noise.In addition, no thoroughfare, and sound carries out informs demonstration (warning when battery electric quantity is not enough, the simulation unlocking noise that is used to express the shooting action, informing sound etc. when focus is adjusted release).Under quiet pattern, also must suppress the sound that takes place with dustproof action dustproof filter 21 together.

If do not select quiet pattern at step S101, then transfer to step S102 from step S101, carry out dustproof action at dustproof filter 21.To store nonvolatile memory 129 into for dustproof filter 21 being executed the value of shaking and setting in N system counter 241 with resonant frequency (f0).Also will execute the time (T0) of shaking to dustproof filter 21 and store nonvolatile memory 129 in order to remove dust.In step S102,, carry out sound dustproof action according to these data.At this, 2 piezoelectric element 22a, 22b are in phase carried out the driving of T0 time with frequency f 0.When preventing dust filter 21 with frequency f 0 vibration, dustproof filter 21 is as Fig. 7, the shown in Figure 8 vibration.Dustproof filter 21 integral body are vibrated with identical phase place.Therefore, if f0 is an audio frequency, the sentient sound of people takes place then.Because be not quiet pattern, so sound takes place becomes informing of dustproof action that the user is carried out, is suitable.

On the other hand, if in step S101, select quiet pattern, then transfer to step S103 from step S101.At this, similarly carry out dustproof action at dustproof filter 21 with the action of step S102.From nonvolatile memory 129 read 2 controlled variable (f1, T1).At this, f1 is the frequency of different with above-mentioned f0 (than f0 height).But, since the driving frequency height then the amplitude of filter diminish, so, for the dust that removes attachment removal fully etc., the driving time T1 in the frequency f 1 need be set longer than the driving time T0 in the frequency f 0.In step S103,, carry out noiseless dustproof action according to the dustproof filter 21 of these controlled variable vibrations.With the dustproof filter 21 of f1 vibration the time, dustproof filter 21 is as Figure 10, shown in Figure 11, to vibrate with Fig. 7, mode that mode of vibration shown in Figure 8 is different.At this, dustproof filter 21 integral body are not vibrated with identical phase place.As seen from the figure, the phasic difference mutually of the skew of central portion and the skew of circumference is 180 °.Therefore, sound that takes place by the skew of central portion and the sound that takes place by the skew of circumference, the phase phasic difference, and cancel each other.Therefore, even f1 is an audible frequency, the user can not hear and dustproof action sound together yet.The vibration mode of the glass plate of the circle of the dustproof filter 21 of formation exists a variety of.Under Fig. 7, vibration mode in addition shown in Figure 8, owing to dustproof filter 21 integral body are not vibrated with identical phase place, so sound is radiation effectively.Therefore, under quiet pattern,, just needn't stick to frequency f 1 as long as do not drive with the frequency that identical phase place is vibrated with dustproof filter 21 integral body.

Step S102 or step S103 transfer to step S104 after carrying out.In step S104, judge the state of the 1st release-push of one of camera operation switch 152.Before the operation that detects the 1st release-push, step S104 standby.When the 1st release-push is operated, transfer to step S105 from step S104.In step S105, from light measuring circuit 121 obtain the being taken monochrome information of body.Then, according to this information, calculate the time shutter (Tv value) of image unit 15 and the aperture settings value (Av value) of lens unit 12.

In step S106, obtain the detection data of AF sensor unit 116 by AF sensor drive driving circuit 117.According to these data, calculate the departure of focus.

In step S107, judge that this departure that calculates whether in the scope of permission, if not in the scope of permission, then carry out the drive controlling of the phtographic lens among the photographic optical system 12a at step S108, turns back to step S104.

On the other hand, in step S107, if departure is then transferred to step S109 in the scope of permission.In step S109, judge the mode of operation of the 2nd release-push of one of camera operation switch 152.When having carried out the operation of switch, transfer to step S110, when not carrying out the operation of switch, transfer to step S104.

In step S110, detect the state of quiet pattern configuration switch.When not being quiet pattern, in step S111, before the shooting action, begin sound dustproof action.This action is identical with the action of the step S102 that has illustrated.Parallel the carrying out of necessary warming-up exercise (step S113, step S114) moved in dustproof action and shooting described later.

On the other hand, in step S110, when being quiet pattern, in step S112, begin noiseless dustproof action.This action is identical with the action of step S103.

In step S113,, set the aperture of the phtographic lens among the photographic optical system 12a according to the Av value that step S105 calculates.

In step S114, quick return mirror 13b is driven into turns over the position.

In step S115,, stop the driving of dustproof filter 21 by in order to finish the driving that dustproof action stops piezoelectric element 22.

In step S116, shutter 14 is opened control.In step S117, according to the Tv value that step S105 calculates imaging apparatus 27 is exposed, by this operation, the action of making a video recording.

In step S118, shutter 14 is carried out closing control.In step S119, when quick return mirror 13b is driven into lowering position, shutter 14 is carried out accumulation of energy.

In step S120, the aperture of the phtographic lens among the photographic optical system 12a is driven into the release position.In step S121, read view data from imaging apparatus 27, convert the form of regulation to after, be saved in storage medium.

According to above-mentioned the 1st embodiment, because when having set quiet pattern, carry out noiseless dustproof action, so, can make the user can't hear the generation sound of camera and the action of preventing dust.

(the 2nd embodiment)

Figure 17 is the process flow diagram of action of Bucom150 that is used for illustrating the camera arrangement of the 2nd embodiment of the present invention.

When Bucom150 has carried out making operation at the power switch of camera, begin its running.In step S200, carry out the processing that is used to start this camera arrangement.Control power circuit 153 is to constituting each circuit unit supply capability of this camera arrangement.In addition, carry out the initial setting of each circuit.

Then, shown in step S201, step S202 and step S203, carry out the action that removes dust during power initiation.Because when power supply disconnects, (for example, the user carries out the replacing of phtographic lens etc.) for a certain reason, dust may be attached to dustproof filter 21.

In step S201, judge the state of the quiet pattern selector switch of one of camera operation switch 152.If quiet pattern selector switch is ON, then quiet pattern is selected, must suppress to be associated with shooting action and the various sound that take place.Therefore, at this, the shooting of slowing down is if any moved, and also will reduce the responsiveness of driver, suppresses mechanicalness noise.In addition, no thoroughfare, and sound carries out informs demonstration (warning when battery electric quantity is not enough, the simulation unlocking noise that is used to express the shooting action, informing sound etc. when focus is adjusted release).Under quiet pattern, also must suppress the sound that takes place with dustproof action dustproof filter 21 together.

If do not select quiet pattern, then transfer to step S202 from step S201 at step S201.In step S202, carry out dustproof action at dustproof filter 21.To store nonvolatile memory 129 into for dustproof filter 21 being executed the value of shaking and setting in N system counter 241 with resonant frequency (f0).To execute the time (T0) of shaking to dustproof filter 21 in order to remove dust and also store nonvolatile memory 129 into.In step S202,, carry out sound dustproof action according to these data.At this, 2 piezoelectric element 22a, 22b in phase only drive the T0 time with frequency f 0.When preventing dust filter 21 with frequency f 0 vibration, dustproof filter 21 is as Fig. 7, the shown in Figure 8 vibration.Dustproof filter 21 integral body are vibrated with identical phase place.Therefore, if f0 is an audible frequency, the people is then taken place can sentient sound.Because be not quiet pattern, so sound takes place becomes informing of dustproof action that the user is carried out, is suitable.

On the other hand, if in step S201, select quiet pattern, then transfer to step S203 from step S201.At this, similarly carry out dustproof action at dustproof filter 21 with the action of step S202.From nonvolatile memory 129 read 2 controlled variable (fs, Ts).At this, fs is a driving frequency, and Ts is a driving time.According to this parameter, when 2 piezoelectric element 22a, 22b were applied the drive signal of 90 ° of phase phasic differences, dustproof filter 21 vibrated as shown in figure 13.At this moment, though the row ripple takes place in dustproof filter 21,, owing to dustproof filter 21 integral body are not in phase vibrated, so sound is radiation effectively.Therefore, become the dustproof action of silent state.

Step S202 or step S203 transfer to step S204 after carrying out.In step S204, judge the state of the 1st release-push of one of camera operation switch 152.Before the operation that detects the 1st release-push, step S204 standby.When the 1st release-push is operated, transfer to step S205 from step S204.In step S205, from light measuring circuit 121 obtain the being taken monochrome information of body.Then, according to this information, calculate the time shutter (Tv value) of image unit 15 and the aperture settings value (Av value) of lens unit 12.

In step S206, obtain the detection data of AF sensor unit 116 by AF sensor drive driving circuit 117.According to these data, calculate the departure of focus.

In step S207, judge that this departure that calculates whether in the scope of permission, if not in the scope of permission, then carry out the drive controlling of the phtographic lens among the photographic optical system 12a at step S208, turns back to step S204.

On the other hand, in step S207, if departure is then transferred to step S209 in the scope of permission.In step S209, judge the mode of operation of the 2nd release-push of one of camera operation switch 152.When having carried out the operation of the 2nd release-push, transfer to step S210, when not operating, transfer to step S204.

In step S210, detect the state of quiet pattern configuration switch.When not being quiet pattern, in step S211, before the shooting action, begin sound dustproof action.This action is identical with the action of the step S202 that has illustrated.Dustproof action and parallel the carrying out of shooting action necessary warming-up exercise (step S213, step S214).

On the other hand, in step S210, when being quiet pattern, transfer to step S212, the dustproof action that beginning curvilinear rows ripple causes from step S210.This action is identical with the action of step S203.

In step S213,, set the aperture of the phtographic lens among the photographic optical system 12a according to the Av value that step S205 calculates.

In step S214, quick return mirror 13b is driven into turns over the position.

In step S215,, stop the driving of dustproof filter 21 by in order to finish the driving that dustproof action stops piezoelectric element 22.

In step S216, shutter 14 is opened control.In step S217, imaging apparatus 27 is exposed the action of making a video recording according to the Tv value that step S205 calculates.

In step S218, shutter 14 is carried out closing control.In step S219,13b is driven into lowering position with quick return mirror.And then, shutter 14 is carried out accumulation of energy.In step S220, the aperture of the phtographic lens among the photographic optical system 12a is driven into the release position.In step S221, read view data from imaging apparatus 27, convert the form of regulation to after, preserve and to manage storage medium.

According to above-mentioned the 2nd embodiment, because when having set quiet pattern, carry out the dustproof action of curvilinear rows ripple, so, can make the user can't hear the generation sound of camera and the action of preventing dust.

(the 3rd embodiment)

In above-mentioned the 1st embodiment and the 2nd embodiment, when having selected quiet pattern,,, do not stop the action of preventing dust even in quiet pattern by drive dustproof filter 21 in the mode that the sound that the people can hear does not take place yet.But, in the 3rd embodiment example, when being provided with quiet pattern, the action of forbidding preventing dust.When forbidding this dustproof action,, quick return mirror 13b is moved to turn over the position in order to reduce to adhere on the dustproof filter 21 probability of dust.

Usually, quick return mirror 13b and exposure actions are driven in linkage, and the action of turning over/falling on carrying out still, at this, when having set quiet pattern, is fixed on quick return mirror 13b and turns over the position.By fixing quick return mirror 13b, the air in the Mirror box is not stirred.Therefore, the dust that exists in the Mirror box flies upward, and the possibility that is attached to dustproof filter 21 diminishes.In addition, also just do not exist by turning over/fall the mechanicalness noise that is taken place on the quick return mirror 13b, consistent with the intention of quiet pattern.

Below, with reference to the process flow diagram of Figure 18, the action of the Bucom150 in the camera arrangement of the 3rd embodiment of the present invention is described.When Bucom150 has been carried out making operation at the power switch of camera, start working.In step S300, carry out the processing that is used to start this camera arrangement.Control power circuit 153 is to constituting each circuit unit supply capability of this camera arrangement.In addition, carry out the initial setting of each circuit.

In step S301, judge the state of the quiet pattern selector switch of one of camera operation switch 152.If quiet pattern selector switch is ON, then quiet pattern has been selected in expression.If quiet pattern selector switch is ON in step S301, then transfer to step S302 from step S301.In step S302, detect the position of quick return mirror 13b.If quick return mirror 13b is at lowering position, then expression is that quiet pattern selector switch has just become ON.So, transfer to step S303 from step S302, quick return mirror 13b is driven into turns over the position.If quick return mirror 13b is set to turns over the position, then view finder becomes shady deal (black out) state, and the user can't utilize view finder to observe the body that is taken.Under this situation,, need utilize LCD monitor 124 in order to observe the body that is taken.

For this reason,, read view data, generate vision signal from imaging apparatus 27 by shutter 14 is set at open state.Then, be shown to LCD monitor 124 with the vision signal body image that will be taken.At this, omit specifying for this action.

Among the step S304 below, carry out dustproof action with defined terms.The dustproof action of step S304 is identical with step S102 (Figure 16).Along with sound takes place in dustproof action, still, because do not prevent dust action under the quiet pattern afterwards, so, no problem.At this, in dustproof action, the reason of not implementing the noiseless dustproof action shown in the 1st, the 2nd embodiment is by carrying out sound dustproof action, utilizing sound to inform that the user has transferred to quiet pattern.

If be set at quiet pattern, quick return mirror 13b does not then need the action of step S303, step S304 in the last position of turning over.At this moment, transfer to step S307 from step S302.

On the other hand, when quiet pattern selector switch is OFF in step S301, in step S305, detect the position of quick return mirror 13b.Quick return mirror 13b represents it is that quiet pattern selector switch has just become OFF in the last position of turning over.If quick return mirror 13b is in the last position of turning in step S305, then in step S306,13b resets into lowering position with quick return mirror.13b is set to lowering position along with quick return mirror, and the shady deal of view finder (black out) state is disengaged.The user can observe the body that is taken by view finder.Transfer to step S307 then.

In step S307, judge the state of the 1st release-push of one of camera operation switch 152.If the 1st release-push is switched on, then transfer to step S308, if the 1st release-push is then transferred to step S301 for disconnecting from step S307.In step S308, detect the state of quiet pattern selector switch.If quiet pattern selector switch is OFF, then transfer to step S309.

In step S309, from light measuring circuit 121 obtain the being taken monochrome information of body.Then, according to this information, calculate the time shutter (Tv value) of imaging apparatus 27 and the aperture settings value (Av value) of lens unit 12.In step S310, carry out the focus adjustment action of well-known phase differential mode.That is, obtain the detection data of AF sensor unit 116 by AF sensor drive driving circuit 117.According to these data, calculate the departure of focus, according to this departure, drive the phtographic lens among the photographic optical system 12a.Afterwards, transfer to step S313.

On the other hand, when in step S308, being quiet pattern, transfer to step S311 from step S308.In step S311,, detect the body monochrome information that is taken according to the output of imaging apparatus 27.Then, calculate the time shutter (Tv value) of imaging apparatus 27 and the aperture settings value (Av value) of lens unit 12.Because quick return mirror 13b is in the last position of turning over, so, the light measuring circuit 121 that disposes in the finder optical system body monochrome information that obtains being taken can't be utilized.

In step S312, carry out the focus adjustment action of well-known contrast mode.That is, adjust the position of phtographic lens, make the contrast of the view data of reading from imaging apparatus 27 reach maximum.

In step S313, judge the mode of operation of the 2nd release-push of one of camera operation switch 152.When having carried out the operation of the 2nd release-push, transfer to step S314, when not carrying out this operation, transfer to step S301.

In step S314, according to the Av value that has calculated, the aperture of the phtographic lens among the control photographic optical system 12a.In step S315, judge whether to have set quiet pattern.If set quiet pattern, then do not need to drive quick return mirror 13b.In addition, also forbid dustproof action.Therefore, at this moment, transfer to step S318 from step S315.

On the other hand, when in step S315, not setting quiet pattern, in step S316, quick return mirror 13b is driven into turns over the position.And then, in step S317, carry out dustproof action.Dustproof action herein is identical with the dustproof action of step S304.

In step S318, shutter 14 is opened control.In step S319, imaging apparatus 27 is exposed according to the Tv value that has calculated.In step S320, shutter 14 is carried out closing control.

In step S321, judge whether to have set quiet pattern.If quiet pattern does not then need quick return mirror 13b is fallen, so, transfer to step S323 immediately.In addition, when not setting quiet pattern, in step S322, quick return mirror 13b is driven into lowering position after, transfer to step S323.In step S323, shutter 14 is carried out accumulation of energy.

Among the step S324 below, the aperture of the phtographic lens among the photographic optical system 12a is driven into the release position.In step S325, read view data from imaging apparatus 27, convert the form of regulation to after, keeping is to storage medium.

According to above-mentioned the 3rd embodiment, because when having set quiet pattern, the action of not preventing dust, so, can make the user can't hear the generation sound of camera and the action of preventing dust.Existence can be carried out the camera of static picture photography and cartoon photographic.Illustrated quiet pattern also useful function in the electronic image pickup device that can carry out cartoon photographic in this example.In Single-sens reflex camera, when carrying out cartoon photographic, in photography, need quick return mirror remained to and turn over the position.In addition, in cartoon photographic, need recording voice.Therefore, in cartoon photographic, do not wish camera generation sound.Consider above-mentioned situation, in the cartoon photographic that utilizes Single-sens reflex camera to carry out, preferably carry out the silent mode shown in this example.

According to the present invention, when having set quiet pattern, can make the user can't hear the generation sound of camera and the action of making a video recording, especially when having set quiet pattern, can make the user can't hear the generation sound of camera and the action of preventing dust.

Claims (16)

1. electronic image pickup device, described electronic image pickup device has:

Photographic optical system, its optical image to the body that is taken carries out imaging;

Photoelectric conversion part, it will convert electric signal to by the optical image of described photographic optical system imaging;

Dustproof filter, it is configured between described photographic optical system and the described photoelectric conversion part, prevents to adhere to dust on the photoelectric conversion surface of described photoelectric conversion part;

Control assembly, the described dustproof filter of frequency vibration that it passes through in accordance with regulations makes described dustproof filter carry out dust and removes action,

It is characterized in that:

Described control assembly vibrates described dustproof filter according to whether having selected quiet pattern with different mode of vibrations.

2. electronic image pickup device as claimed in claim 1 is characterized in that:

Described control assembly vibrates described dustproof filter according to whether having selected quiet pattern with different driving frequencies.

3. electronic image pickup device as claimed in claim 2 is characterized in that:

Described control assembly is compared with the situation of not selecting described quiet pattern when having selected quiet pattern, vibrates described dustproof filter with high driving frequency.

4. electronic image pickup device as claimed in claim 3 is characterized in that:

Described control assembly vibrates described dustproof filter with the driving frequency that audible sound does not take place when having selected quiet pattern.

5. electronic image pickup device as claimed in claim 1 is characterized in that:

Described control assembly makes described dustproof filter that the row ripple take place according to whether having selected quiet pattern, perhaps makes described dustproof filter generation standing wave.

6. electronic image pickup device as claimed in claim 5 is characterized in that:

Described dustproof filter has a plurality of piezoelectric elements, described control assembly is when having selected quiet pattern, described a plurality of piezoelectric elements are applied the driving voltage of out of phase, when not selecting described quiet pattern, described a plurality of piezoelectric elements are applied the driving voltage of same phase.

7. electronic image pickup device, described electronic image pickup device has:

Photographic optical system, its optical image to the body that is taken carries out imaging;

Photoelectric conversion part, it will convert electric signal to by the optical image of described photographic optical system imaging;

Dustproof filter, it is configured between described photographic optical system and the described photoelectric conversion part, prevents to adhere to dust on the photoelectric conversion surface of described photoelectric conversion part;

Control assembly, the described dustproof filter of frequency vibration that it passes through in accordance with regulations makes described dustproof filter carry out dust and removes action,

It is characterized in that:

Described control assembly is carried out the dust of described dustproof filter and is removed action according to whether having selected quiet pattern, forbids that perhaps the dust of described dustproof filter is removed action.

8. electronic image pickup device, described electronic image pickup device has:

Photographic optical system is carried out imaging to the optical image of the body that is taken;

Photoelectric conversion part converts described optical image to electric signal;

Dustproof filter is configured between described photographic optical system and the described photoelectric conversion part, can vibrate with setting cycle,

Described electronic image pickup device is characterised in that:

Described electronic image pickup device has control assembly, its vibration to described dustproof filter is controlled, make the described dustproof filter can be the 1st mode of vibration of audible sound taking place in when vibration and compare the 2nd little mode of vibration of audible sound with described the 1st mode of vibration and vibrate, wherein said the 2nd mode of vibration be the mode of vibration of carrying out when described electronic image pickup device is set to silent mode.

9. electronic image pickup device as claimed in claim 8 is characterized in that:

Described the 1st mode of vibration is the mode of vibration that makes described dustproof filter generation standing wave, and described the 2nd mode of vibration is to make described dustproof filter that the mode of vibration of row ripple take place.

10. electronic image pickup device as claimed in claim 8 is characterized in that:

Being with the described dustproof filter of the 1st frequency vibration in described the 1st mode of vibration, is with the described dustproof filter of the 2nd frequency vibration that is higher than described the 1st frequency in described the 2nd mode of vibration.

11. an electronic image pickup device, described electronic image pickup device has:

Photographic optical system, its optical image to the body that is taken carries out imaging;

Photoelectric conversion part, it converts described optical image to electric signal;

Dustproof glass, it is configured between described photographic optical system and the described photoelectric conversion part;

A plurality of piezoelectric elements, it is configured in the circumference of described dustproof glass;

Drive control component, it applies periodic drive voltage to described a plurality of piezoelectric elements, by the vibration of consequent described piezoelectric element, makes described dustproof glass generation vibration wave,

It is characterized in that:

Described drive control component can reach the described a plurality of piezoelectric elements of the 2nd frequency drives that audible sound does not take place so that the 1st frequency of the vibration of audible sound takes place described dustproof glass,

Described electronic image pickup device has quiet pattern, and described drive control component is when described quiet pattern, with the described a plurality of piezoelectric elements of described the 2nd frequency drives.

12. electronic image pickup device as claimed in claim 11 is characterized in that:

Described the 1st frequency height of described the 2nd frequency ratio.

13. an electronic image pickup device, described electronic image pickup device has:

Photographic optical system, its optical image to the body that is taken carries out imaging;

Photoelectric conversion part, it converts described optical image to electric signal;

Dustproof glass, it is configured between described photographic optical system and the described photoelectric conversion part;

A plurality of piezoelectric elements, it is configured in the circumference of described dustproof glass;

Drive control component, it applies periodic drive voltage to described a plurality of piezoelectric elements, by the vibration of consequent described piezoelectric element, makes described dustproof glass generation vibration wave;

Set parts, it is used for selecting to set common pattern and quiet pattern,

It is characterized in that:

Described drive control component makes described dustproof glass generation standing wave under described common pattern, under described quiet pattern, make described dustproof glass that the row ripple take place.

14. electronic image pickup device as claimed in claim 13 is characterized in that:

Described drive control component applies the driving voltage of same phase to described a plurality of piezoelectric elements under described common pattern, under described quiet pattern, described a plurality of piezoelectric elements are applied the driving voltage of out of phase.

15. an electronic image pickup device, described electronic image pickup device has:

Photographic optical system, its optical image to the body that is taken carries out imaging;

Photoelectric conversion part, it converts described optical image to electric signal;

Dustproof filter, it is configured between described photographic optical system and the described photoelectric conversion part, can vibrate with setting cycle;

The vibration control parts in its moment before the shooting action, vibrate described dustproof filter;

Set parts, it is used for selecting to set common pattern and quiet pattern,

It is characterized in that:

When having set described quiet pattern, the vibration action of forbidding described dustproof filter.

16., it is characterized in that described electronic image pickup device is a kind of camera head of single-lens reflex, also has as electronic image pickup device as described in the claim 15:

Quick return mirror, it can be set at the 2nd position that described optical image is imported the 1st position of viewing optical system and described optical image imported described photoelectric conversion part;

When having set described quiet pattern, by described quick return mirror being set to the vibration action that described dustproof filter is forbidden in described the 2nd position.

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