WO2006080443A1 - 撮像装置及び電子機器 - Google Patents
撮像装置及び電子機器 Download PDFInfo
- Publication number
- WO2006080443A1 WO2006080443A1 PCT/JP2006/301329 JP2006301329W WO2006080443A1 WO 2006080443 A1 WO2006080443 A1 WO 2006080443A1 JP 2006301329 W JP2006301329 W JP 2006301329W WO 2006080443 A1 WO2006080443 A1 WO 2006080443A1
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- WO
- WIPO (PCT)
- Prior art keywords
- imaging
- lens
- cam
- region
- optical axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B29/00—Combinations of cameras, projectors or photographic printing apparatus with non-photographic non-optical apparatus, e.g. clocks or weapons; Cameras having the shape of other objects
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/52—Details of telephonic subscriber devices including functional features of a camera
Definitions
- the present invention relates to an imaging device that can be mounted on an electronic device such as a mobile phone or a mobile computer, and an electronic device incorporating the imaging device.
- a small and high-performance imaging device that can be mounted on an electronic device such as a mobile phone or a personal computer.
- an imaging lens that forms an optical image of a subject
- an imaging lens There is an image sensor such as a CMOS type image sensor that converts an optical image formed by the method into an electrical signal.
- an imaging device there is known an imaging device that can adjust the focus by moving the imaging lens in the optical axis direction (see, for example, Patent Document 1).
- the imaging lens has moved.
- An auto focus (AF) processing function has been developed that automatically adjusts the focus by automatically performing the control under the control of the CPU!
- a cam member that supports an imaging lens from the lower side and has a horizontal surface and a cam surface having an AF area that is continuous with the horizontal region
- the cam lens is driven in a predetermined direction so that the imaging lens can be moved in the optical axis direction. More specifically, by driving the cam member so that the predetermined contact portion of the imaging lens is in contact with the upper side of the AF region of the cam member, the focus can be adjusted from the closer range side, By bringing the abutment part of the imaging lens into contact with the lower side of the AF area, the focal point can be adjusted to the far side.
- the cam member is provided with a starting point portion that becomes the starting point of the cam, and when the imaging lens is appropriately moved to the close range or the infinity range, the overfocus position force is close to the start point portion as a reference. It is necessary to store the number of stepping motor pulse signals up to infinity and infinity in the memory.
- Patent Document 1 JP-A-10-170809
- the cam starting point is detected by detecting whether or not the predetermined contact portion of the imaging lens reaches the starting point during the movement of the cam member.
- An error in the detection position occurs due to individual differences. Therefore, conventionally, since the error of the detection position is stored in the memory in advance and control for correcting the error of the detection position is performed, there is a problem that it is complicated and increases the cost. .
- an object of the present invention is to provide an imaging device that can easily and inexpensively eliminate the influence of variation in the detection position caused by the individual difference of the imaging device, and an electronic apparatus including the imaging device It is to be.
- an imaging lens that forms an optical image of a subject, an imaging element that converts the optical image formed by the imaging lens into an electrical signal, A holding member that holds the imaging lens, a supporting member that supports the holding member, and provided on any one of the holding member and the supporting member, and the imaging lens is displaced in the optical axis direction with respect to the imaging element.
- a cam section for driving, a driving means for rotating any one of the holding member and the supporting member, and controlling the driving of the driving means at the time of imaging of the subject to position the imaging lens on the optical axis.
- an autofocus processing means for performing autofocus processing for automatically adjusting the in-focus position of the imaging lens by moving in the direction
- the cam portion includes the holding member and the support portion.
- a cam surface is formed on which the abutting portion formed on the other part where the cam portion is not provided is abutted, and the cam surface moves the imaging lens to the optical axis in the autofocus process.
- the error range of the detection position by the detection means caused by individual differences of the imaging device means that each of the detection means detects that the contact portion is in contact with the starting point portion. Between the imaging devices, the detection position caused by individual differences such as cam member detection means varies. This means a range of variation in detection position between these imaging devices.
- the contact portion is in contact with the cam surface of the cam portion, and when the contact portion reaches the starting point portion on the cam surface, the detection means detects the contact portion. . Then, the lengths of the two horizontal portions on the cam surface starting from the starting point are longer than the error range length of the detection position by the detecting means caused by the individual difference of the imaging device.
- the length of the horizontal portion is longer than the error range length, so the contact portion is reliably positioned on the horizontal portion on the cam surface. Can be placed.
- FIG. 1 is a plan view showing an imaging apparatus exemplified as an embodiment to which the present invention is applied.
- FIG. 2 is a partially omitted cross-sectional view of the imaging apparatus taken along the line AA in FIG.
- FIG. 3 is a block diagram showing a main part configuration of the imaging apparatus in FIG. 1.
- FIG. 4 is a perspective view showing a cam member provided in the imaging apparatus of FIG. 1.
- FIG. 5 (a) is a diagram schematically showing a cam surface and a pulse signal of the cam member of FIG. (b) is a partially enlarged view of (a) for explaining the error range ⁇ .
- FIG. 6 is a partially omitted cross-sectional view of the imaging apparatus taken along line AA in FIG.
- FIG. 7 is a front view and a rear view showing an example of a mobile phone equipped with an imaging apparatus according to the present invention.
- An imaging lens that forms an optical image of a subject, an imaging element that converts an optical image formed by the imaging lens into an electrical signal, a holding member that holds the imaging lens, and a support member that supports the holding member A supporting member, a cam portion that is provided on any one of the holding member and the supporting member, and that displaces the imaging lens in the optical axis direction with respect to the imaging element, and any of the holding member and the supporting member A driving means for rotating one of them, and when the subject is imaged, the driving of the driving means is controlled to move the imaging lens in the optical axis direction to automatically adjust the in-focus position of the imaging lens.
- An autofocus processing means for performing autofocus processing wherein the cam portion includes Of the holding member and the support member, the cam portion is provided, and a cam surface is formed on which the abutting portion formed on a part of the other is abutted, and the cam surface is the autofocus.
- the error range of the detection position by the detection means caused by individual differences of the imaging device means that each of the detection means detects that the contact portion is in contact with the starting point portion.
- Variations in detection positions caused by individual differences such as cam members and detection means between the imaging devices mean a range of variations in detection positions between these imaging devices.
- the two horizontal portions configure a far region and a close region that are arranged with the hyperfocal position interposed therebetween.
- the horizontal portion configuring the far region is an infinite far region.
- the cam surface of the cam unit may have a position in the optical axis direction of the imaging lens as a far region in addition to the two horizontal units. It has a horizontal reference position (reference area) that is positioned between the closest area.
- the reference position portion is not formed in the middle of the inclined portion.
- the reference position is equal to or longer than an error range length of a detection position detected by the detection unit, which is caused by an individual difference of the imaging device.
- the cam surface is configured in the order of the reference position portion, the far region, the AF region, and the close region.
- the imaging lens is used as the holding member in a state where the contact portion is in contact with the reference position portion and the imaging lens is positioned.
- the cam portion and the contact portion rotate relatively around an axis in the optical axis direction.
- the holding member or the support member is held at a plurality of three or more points so as to have substantially equal intervals.
- FIG. 1 is a plan view showing an imaging apparatus 100 exemplified as an embodiment to which the present invention is applied, and FIG. 2 is a partially omitted sectional view of the imaging apparatus 100 taken along the line AA in FIG. is there.
- FIG. 3 is a block diagram showing the main configuration of the control system of the imaging apparatus 100.
- FIG. 1 the illustration of the upper lid la of the device case 1 is omitted.
- the imaging apparatus 100 of the present embodiment is configured to be able to execute autofocus processing for automatically adjusting the in-focus position of the lens unit 4, and specifically, as shown in Figs. , Device case 1, substrate 2 disposed on the lower side of device case 1, image sensor 3 attached to the light source side (upper) surface of substrate 2, and lens for focusing on image sensor 3 Part 4, an outer cylinder part 5 as a holding member for holding the lens part 4, and a cam that supports the outer cylinder part 5 and displaces the outer cylinder part 5 relative to the image sensor 3 in the optical axis direction.
- a driving motor 7 as a driving means for moving the lens portion 4 in the optical axis direction via the member 6 and the cam member 6; and a driving force for transmitting the driving force of the driving motor 7 to the cam member 6.
- Photointerrupter 9 as detection means for detecting the position of the transmission member 8 and the lens unit 4 in the optical axis direction And a control unit 10.
- the substrate 2 also has, for example, a ceramic substrate and the like, and the device case 1 is attached with the lower end in contact with the surface on the light source side.
- a flexible substrate F is connected to a part of the substrate 2.
- the flexible substrate F is electrically connected to the image sensor 3 via predetermined wiring (not shown).
- the image sensor 3 is a photoelectric conversion unit 3a that converts an optical image of a subject formed by the lens unit 4 on the light source side at a predetermined position (for example, the left side in FIG. 2) of the substrate 2 into an electrical signal. It is attached to be arranged.
- the image sensor 3 is, for example, a CMOS type image.
- the outer shape of the sensor, CCD type image sensor, etc. is formed in a substantially rectangular thin plate.
- the light source side of the image sensor 3 has a function as a filter that cuts off infrared rays or the like, for example, and covers the image sensor 3 so that dust or the like can be prevented from adhering to the image sensor 3.
- One member 31 is provided. On the light source side of the cover member 31, a lens unit 4 for forming an optical image of the subject on the photoelectric conversion unit 3a of the image sensor 3 is disposed.
- the lens unit 4 includes a first lens 41, a second lens 42, and a third lens 43, which are arranged in order from the light source side as imaging lenses, and the first lens 41, the second lens 42, and the first lens 43.
- the three lenses 43 are fixed to an inner peripheral portion of a lens fixing frame portion 44 whose outer shape is formed in a cylindrical shape.
- a diaphragm plate 45 for adjusting the amount of light is disposed between the first lens 41 and the second lens 42, and the second lens 42 and the third lens 43
- An interval regulating member 46 for regulating the interval between the second lens 42 and the third lens 43 is disposed between them.
- the lens fixing frame portion 44 includes a male screw portion 44a on its outer peripheral portion, and the lens portion 4 has a male screw portion of the lens fixing frame portion 44 on a female screw portion 5la formed on the inner peripheral portion of the outer cylinder portion 5. By screwing 44a, it is arranged inside the outer cylinder 5! /
- the lens unit 4 can be moved in the optical axis direction by rotating the lens unit 4 around the axis in the optical axis direction with respect to the outer cylinder unit 5, and thus the lens.
- An in-focus state adjustment mechanism that adjusts the in-focus state of part 4 is configured. More specifically, in a state where the contact portion 53a of the outer cylinder portion 5 is in contact with a reference area (described later) of the cam member 6 and is positioned in the optical axis direction, the lens portion 4 is used using a predetermined chart. The focusing state of the lens unit 4 is adjusted by screwing the lens unit 4 and moving it in the optical axis direction according to the evaluation state. In this way, the focus state of the lens unit 4 at the reference imaging position is adjusted.
- the outer cylinder portion 5 is a member whose outer shape is formed in a substantially cylindrical shape, for example, and is connected to the upper annular portion 51 having an inner thread portion 5la formed on the inner peripheral portion, and the upper annular portion 51.
- the pressed portion 52 is pressed against the substrate 2 by the pressing member 11 such as a panel, and is formed continuously to the pressed portion 52, and is in contact with the cam surface 611 of the cam member 6 at the lower end.
- the abutting portion 53a is formed so that three lower surface forces of the lower annular portion 53 protrude toward the image sensor 3 side at an interval of approximately 120 °. Further, the protruding length of the contact portion 53a is substantially equal to the height difference of the upper surface of the cam surface 611 of the cam member 6, or is longer than the height difference.
- the upper end portion of the pressing member 11 is in contact with, for example, the lower surface of the upper lid portion la of the device case 1, so that the outer cylindrical portion 5 is moved toward the substrate 2 by the pressing member 11. It is always energized.
- a detection wing member 54 for detecting the position of the lens unit 4 in the optical axis direction by the photo interrupter 9 is disposed at a predetermined position of the outer cylinder unit 5.
- FIG. 4 is a perspective view showing the cam member 6, and FIGS. 5A and 5B are views schematically showing the cam surface 611 of the cam member 6.
- the cam member 6 is, for example, a member formed in a substantially annular shape. Specifically, the abutting portion 53a is abutted on the upper surface and the outer cylinder portion 5 is placed on the lower side. Force The upper cam portion 61 as a cam portion having a cam surface 611 to be supported, and the lower force of the upper cam portion 61 project outward, and a gear is formed on the outer peripheral portion. And a lower disk part (pedestal) 62 that is a support member for supporting the corresponding part 5.
- the cam surface 611 of the upper cam portion 61 has a reference area 6 la having a horizontal plane extending in a direction substantially orthogonal to the optical axis direction, and is more than the reference area 61a.
- AF area 61e with a wide inclined surface, and a large step area 61f that continuously connects the near area 61d and the reference area 61a. Are formed at approximately 120 ° intervals.
- the difference in height of the large step region 61f is, for example, at least a parameter output from the photo interrupter 9.
- the level of the pulse signal is high enough to be switched by the detection wing member 54. That is, for example, when the cam member 6 rotates so that the cam surface 611 moves in the left direction in FIG. 5A, the contact portion 53a moves the large step region 61f downward as well.
- the pulse signal output from the photo interrupter 9 is switched from the low level (L level) to the high level (H level) based on the relative height difference between the detection blade member 54 and the photo interrupter 9. It ’s like that.
- the powerful step area 61f forms the starting point.
- the reference area 61a is an area for fixing the position of the lens unit 4 in the optical axis direction when power is turned on or when imaging is performed with a fixed focus which is a normal imaging state.
- the lens unit 4 is positioned in the optical axis direction so that it is focused at the hyperfocal position!
- the focusing state of the lens unit 4 can be adjusted easily and appropriately without the need for a collimator or the like, so that the subject can be imaged more appropriately at a fixed focus. it can.
- the reference area 6 la has a plane portion located before and after the AF area 6 le as an over-infinite area 6 lb and a close-in area 61d.
- the lens unit 4 serves as a reference position for positioning the lens unit 4 with respect to the image sensor 3 in the optical axis direction so that the lens unit 4 is focused. That is, the adjustment of the focusing state of the lens unit 4 so that an optical image is formed on the photoelectric conversion unit 3a of the image sensor 3 with the contact portion 53a of the outer cylinder unit 5 in contact with the reference region 61a.
- the optical image of the lens unit 4 is formed by the photoelectric conversion unit 3a of the image sensor 3 even when the lens unit 4 is moved to the far infinity position and the closest position during autofocus processing.
- the Rukoto is a reference position for positioning the lens unit 4 with respect to the image sensor 3 in the optical axis direction so that the lens unit 4 is focused. That is, the adjustment of the focusing state of the lens unit 4 so that an optical image is formed on
- the AF area 61e is an area for displacing the lens unit 4 in the optical axis direction by autofocus processing (described later), and constitutes an inclined surface part.
- the lower side is the far side and the upper side is the near side 61d. That is, the contact portion 53a slides along the AF area 61e, so that the distance in the optical axis direction of the lens unit 4 with respect to the photoelectric conversion unit 3a of the imaging device 3 can be changed.
- the cam member 6 is driven so that the abutting portion 53a abuts on the upper side of the AF area 61e, so that the focus can be adjusted from the near area 6 Id side.
- the abutting part 53a of the lens part 4 is brought into contact with the lower side. Therefore, the focal point can be adjusted with the far side force.
- the lower area of the AF area 61e is an area for positioning the lens unit 4 in the optical axis direction so as to focus in the distance.
- the far region is a region that also has a positional force to focus on a subject farther than the hyperfocal point, and is a region that includes a far infinite region.
- the far infinity region 61b is a far infinity lens fixed position for positioning in the optical axis direction so that the lens unit 4 is focused at the far infinity position. Constitutes one of these.
- the hyper-infinity position is specifically an area where the photographing magnification is positive, which is on the opposite side of the infinite distance area 61d from the infinite distance area, and the focal point of the lens unit 4 is infinite. It can be adjusted from the far side more infinitely than the far side.
- the refractive index of the predetermined grease constituting the first lens 41, the second lens 42, and the third lens 43 of the lens unit 4 may vary depending on environmental conditions such as temperature and humidity. It becomes impossible to focus at infinity. Therefore, even if the refractive index of the resin changes and it becomes impossible to focus at infinity in the normal state, it is possible to shift the in-focus position to the opposite side from the closest region 61d by the far infinity region 61b. Thus, the focal point can be adjusted to the proper side force at infinity.
- the close-up area 61d is an area for positioning the lens unit 4 in the optical axis direction so as to focus at the close-up imaging position, and constitutes the other of the two horizontal parts.
- the lens portion 4 is extended to the most object side (see FIG. 6).
- the distance between the subject and the lens unit 4 is, for example, about 5 to 30 (cm), and the image of the document can be imaged over the entire imaging region (photoelectric conversion unit 3a) of the image sensor 3, or the present invention can be applied.
- the imaging apparatus 100 is mounted on such a cellular phone (described later), the imaging apparatus 100 can be used as a barcode reader.
- the gear of the lower disk portion 62 is meshed with a spur gear portion (not shown) formed on the lower outer peripheral portion of the driving force transmission member 8.
- the driving force transmission member 8 is provided with teeth (not shown) concentrically with the spur gear portion and above the spur gear portion. Mounted and fixed to the output shaft Combined with the warm 71!
- the rotational direction of the driving force transmission member 8 is such that when the lens unit 4 is moved from the distant imaging position to the closest imaging position, the driving force transmission member 8 is engaged with the worm 71 and the tooth.
- the direction is such that it is biased toward the substrate 2 side. That is, since the lens unit 4 is urged from the light source side to the substrate 2 side by the pressing member 11, when the lens unit 4 is moved in the optical axis direction in the AF area 61e, the driving force transmission member 8 In order to improve the positioning accuracy of the lens unit 4 in the optical axis direction, it is preferable to rotate the lens unit 4 so that the lens unit 4 is biased toward the substrate 2 side.
- the driving force transmission member 8 is urged toward the substrate 2 by extending the lens unit 4. If a helical tooth is provided and autofocus processing is executed when the lens unit 4 is retracted, the helical force is applied so that the driving force transmitting member 8 is biased toward the substrate 2 by retracting the lens unit 4. It is preferable to set up.
- the drive motor 7 is a pulse motor such as a stepping motor, for example, and is configured to step-drive the rotor by a predetermined angle based on the pulse output and input from the CPU10a force. As a result, the cam member 6 is rotated in the predetermined direction around the optical axis direction via the worm 71 and the driving force transmission member 8.
- the photo interrupter 9 is configured to have a function of detecting the detection wing member 54 as detection means and converting the detected information into a pulse signal that can be transmitted to the control unit 10.
- a projector including an infrared diode that emits infrared light, and a light receiver that receives the emitted infrared light and changes a pulse signal output to the control unit according to the light reception result.
- a projector including an infrared diode that emits infrared light, and a light receiver that receives the emitted infrared light and changes a pulse signal output to the control unit according to the light reception result.
- the photo interrupter 9 outputs an L level pulse signal to the control unit 10.
- the infrared ray is irradiated in a state where the detection wing member 54 is not positioned in the infrared optical path
- the irradiated infrared ray is received by the light receiver, and the photo interrupter 9 transmits the H level pulse signal to the control unit. Output to 10.
- the photo interrupter 9 changes to a state where the detection wing member 54 is positioned in the infrared optical path and the state force is also positioned. As a result, an H level pulse signal is output to the control unit 10 as a detection signal.
- the control unit 10 uses the pulse signal of the H level pulse signal output when the contact portion 53a reaches the large step region 61f as the reference pulse signal, and the pulse signal of the motor having the reference pulse signal generation force.
- the position of the contact portion 53a is determined by counting the number of pulses (number of pulses).
- the detection position is relative to the photo interrupter 9 and the detection blade member 54. Varies depending on height difference.
- the reference noise signal is output between the individual imaging devices 100, because it differs for each imaging device 100 due to, for example, the dimensional error of each member such as the detection wing member 54 and the assembly accuracy.
- An error range ⁇ force is generated at the detected position.
- the “error range ⁇ ” is a variation in detection position that occurs between individuals of the imaging device when the photo interrupter 9 detects that the contact portion 53a has reached the large step region 61f. Means range.
- the detection blade 53a is detected so that the contact portion 53a is detected in a state where the contact portion 53a is in contact with the position (center position) P1 of the large step region 61f in the longitudinal direction.
- the case where the dimensions and assembly of the member 54 and the photo interrupter 9 are adjusted will be described as an example.
- the "error range ⁇ " is at least the detection position P2 and the center where the contact portion 53a is detected in a state where the contact portion 53a is in contact with the boundary between the large step region 61f and the closest region 61d.
- Detection error ⁇ 1 which is an error from position P1
- detection position P3 where contact part 53a is detected with contact part 53a in contact with both large step area 61f and reference area 61a
- the error of This means the length of the range consisting of the detection error ⁇ 2.
- detection errors ⁇ 3 and ⁇ 4 occur due to the characteristics of each imaging device, it means the length of the range including the detection errors ⁇ 3 and ⁇ 4. Therefore, an error range ⁇ 5 is generated as the maximum error range generated between the individual imaging devices.
- the length of each area constituting the cam surface 611 is approximately equal to the length of 6 lb of the infinitely far region and the length of the closest region 6 Id. It has approximately twice the length of lb, the AF area 61e has approximately three times the length of the infinitely far area 61b, and the length of the small step area 61c is shorter than the length of any area. Further, the lengths of the infinitely far region 61b and the closest region 61d are configured to have a length longer than the length of the error range ⁇ 5.
- the control unit 10 is for controlling the autofocus process, and specifically includes a CPU10a, a RAM10b, and a storage unit 10c as shown in FIG.
- the control unit 10, the image sensor 3, the drive motor 7, and the photo interrupter 9 are electrically connected via the bus B.
- the CPU (Central Processing Unit) 10a controls and controls each part of the imaging apparatus 100, reads a predetermined program stored in the storage unit 10c, and expands it in the RAMlOb work area. Then, various processes are executed according to the program.
- the CPU Central Processing Unit
- a RAM (Random Access Memory) 10b constitutes a storage area and a work area for programs and data read from the storage unit 10c under the control of the CPU 10a.
- the storage unit 10c includes, for example, a ROM (Read Only Memory), an EEPROM (Electronic Erasable Programmable ROM), and the like, and is used for various programs executed under the control of the CPU10a and the processing of each program. This data is stored. Specifically, the storage unit 10c stores, for example, an autofocus processing program.
- the autofocus processing program is used as an autofocus processing means for CPU10a.
- the auto focus is automatically adjusted by moving the outer cylinder part 5 holding the lens part 4 in the optical axis direction by controlling the drive of the drive motor 7 and moving the outer cylinder part 5 in the optical axis direction. It is a program that realizes a function for performing processing.
- the autofocus process is performed, for example, by rotating the cam member 6 in a predetermined direction and sliding the contact portion 53a of the outer cylinder portion 5 on the cam surface 611 under the control of the CPU10a.
- the image data is acquired by capturing the subject while moving the lens section 4 between the distant image capturing position and the close image capturing position.
- CPUlOa sequentially stores the frequency analysis data acquired by performing specific frequency analysis of the acquired image data at a plurality of focus adjustment positions in RAMlOb. Further, CPUlOa evaluates the focus state of the optical image of the subject at the focus adjustment position of the image data based on the frequency analysis data stored in RAMlOb, and focuses the imaging position with the best evaluation value. The position is specified.
- the CPU 10a rotates the drive motor 7 forward to move the lens unit 4 from the far imaging position to a predetermined position of the closest imaging position, finds the imaging position with the best evaluation value, and then drives By rotating the motor 7 in the reverse direction, the cam member 6 is rotated in the reverse direction to move the lens unit 4 to the far-field imaging position. Then, again, the drive motor 7 is rotated forward so that the lens unit 4 is moved to the imaging position with the best evaluation value.
- the backlash caused by the reverse rotation of the drive motor 7 is taken into account and the backlash is returned to a larger amount.
- the CPU 10a moves the lens unit 4 to the closest region 6 Id without executing the autofocus process.
- the lens unit 4 is moved in one direction from the far imaging position force to the closest imaging position, and one AF area 6 le provided on the cam surface 611 of the cam member 6 is reduced.
- a guide for an imaging position with a good evaluation value is searched for in one AF area 61e, and the number of pulses from the reference area 61a up to the imaging position that is the target is stored, and based on the number of pulses.
- the starting point can be detected by rotating the cam portion in one direction. Therefore, the starting point can be detected regardless of the state at the end of the previous drive. It can be started with simple control. Further, since the cam portion has a rotational shape having no end point, even if an error occurs because the photo interrupter 9 does not detect the starting point portion, the structure of the cam portion is not damaged.
- an electronic apparatus equipped with the imaging device 100 of the present invention taking the imaging device 100 as an example, will be described.
- the electronic device is, for example, a foldable mobile phone T, and includes an upper housing 12a as a case with a display screen D and a lower housing with an operation button P. 12b is linked via Hinge 12c.
- the imaging device 100 is built below the display screen D on the inner surface side (the side having the display screen D) of the upper housing 12a, and the imaging device 100 can capture the outer surface force light of the upper housing 12a. It is supposed to be.
- the mobile phone T incorporates the imaging device 100, an increase in the size of the mobile phone T can be suppressed, and the subject can be captured according to the distance from the subject, the imaging environment, and the like. Therefore, the mobile phone T with high added value can be obtained.
- the contact portion 53a provided in the outer cylinder portion 5 is in contact with the cam surface 611 of the cam member 6, and the cam surface 611
- the large step region 61f at the point reaches the contact portion 53a, it is detected by the photo interrupter 9.
- the length force of the far infinity region 6 lb and the closest region 6 Id on the cam surface 611 starting from the large step region 6 If exceeds the error range length of the detection position by the photo interrupter 9 caused by individual differences of the imaging device It becomes length.
- the contact portion 53a is camped. It can be reliably located in the far-infinite region 61b and the closest region 61d on the surface 611.
- the extra-infinity region 61b and the close region 61d are longer than the length of the error range. Since the abutment portion 53a that does not perform software processing can be reliably positioned in the far infinity region 61b and the closest region 61d, the autofocus processing can be performed more suitably.
- the imaging apparatus 100 includes an autofocus processing unit that performs autofocus processing for automatically adjusting the in-focus position of the lens unit 4 when imaging a subject, and the lens unit 4 is connected to the imaging element 3.
- the cam surface 611 of the cam member 6 that is displaced in the optical axis direction fixes the position of the lens unit 4 in the optical axis direction when the subject is imaged at a fixed focal point, and the lens during autofocus processing.
- An AF area 61e is provided for displacement.
- the cam member 6 is rotated so that the reference portion 61a of the cam surface 611 contacts the contact portion 53a of the outer cylinder portion 5 holding the imaging lens.
- the position of the lens unit 4 in the optical axis direction with respect to the image sensor 3 can be fixed.
- the lens unit 4 is positioned at a predetermined position between the close range 61d side and the far-infinite range 61b side of the AF area 61e, and compared with a configuration in which imaging is performed.
- the control related to the positioning of the lens unit 4 can be simplified, and the power consumption can be reduced.
- the lens unit 4 is positioned so that the lens unit 4 is properly focused at the far position and the close position during autofocus processing.
- the optical image formed by the lens unit 4 is in focus on the image sensor 3 while being in contact with the AF area 61e of the cam surface 611.
- the lens portion 4 can be displaced in the optical axis direction while the portion 53a is brought into contact therewith.
- the lens portion 4 is moved in the optical axis direction with respect to the outer cylinder portion 5, and the lens Since the in-focus state adjusting mechanism for adjusting the in-focus state of the unit 4 is provided, the in-focus state of the lens unit 4 can be easily and appropriately adjusted by the in-focus state adjusting mechanism.
- the cam member 6 supports the outer cylinder portion 5 at a plurality of points with three-point force so as to be spaced at substantially equal intervals, adjustment of the in-focus state of the lens portion 4 by the in-focus state adjusting mechanism is performed. At this time, the lens unit 4 can be properly supported. In other words, the lens part 4 is prevented from tilting. For example, a member such as a guide is not required, and the center of gravity of the lens part 4 is held at multiple points so that the structure is strong against impact. Can do.
- the imaging device 100 in the mobile phone T, it is possible to easily and inexpensively eliminate the influence due to the variation in the detection position caused by the individual difference of the imaging device 100.
- the structure other than the components related to the AF process that is, the assembly of the lens unit 4
- the lens structure 4 and the focusing state adjustment mechanism at the reference imaging position of the lens unit 4 are shared with the imaging device 100 of the above embodiment, so that the lens unit 4 can be assembled and the focusing state of the lens unit 4 can be adjusted. Operations such as adjustment can be performed easily in a similar manner.
- the lower annular portion 53 of the outer cylindrical portion 5 is provided with three contact portions 53a, ..., and these contact portions 53a are contacted with the cam surface 611 of the cam member 6.
- the force by which the outer cylinder part 5 is supported at three points by the cam member 6 The support of the outer cylinder part 5 is not limited to this.
- the force that provides the cam surface 611 with the 6 lb over-infinite region is not limited to this.
- the force that forms the 6 lb over-infinite region can be changed as appropriate. It has been.
- the photo interrupter 9 detects the detection wing member 54, thereby detecting that the contact portion 53a has reached the large step area 61f.
- the method of detecting that 53a has reached the large step region 61f is not limited to this.
- a reflecting member is disposed at a predetermined position on the side surface of the upper cam portion 61 constituting the cam member 6.
- a sensor such as a photo reflector may be provided at a position facing the side surface of the upper cam portion 61. In this case, when the photoreflector receives the reflected light that is irradiated by the photoreflector and reflected by the reflecting member, it is detected that the contact part 53a has reached the large step area 61f.
- the driving means is not limited to the driving motor, and for example, a piezoelectric element, a shape memory alloy, or the like can be used.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Studio Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006800032612A CN101107555B (zh) | 2005-01-31 | 2006-01-27 | 摄像装置以及电子设备 |
| JP2007500599A JPWO2006080443A1 (ja) | 2005-01-31 | 2006-01-27 | 撮像装置及び電子機器 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005024056 | 2005-01-31 | ||
| JP2005-024056 | 2005-01-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006080443A1 true WO2006080443A1 (ja) | 2006-08-03 |
Family
ID=36740467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2006/301329 Ceased WO2006080443A1 (ja) | 2005-01-31 | 2006-01-27 | 撮像装置及び電子機器 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2006080443A1 (ja) |
| KR (1) | KR20070110003A (ja) |
| CN (1) | CN101107555B (ja) |
| WO (1) | WO2006080443A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008191423A (ja) * | 2007-02-05 | 2008-08-21 | Sharp Corp | レンズユニット及びカメラモジュール、並びに該カメラモジュールを備えた撮像装置 |
| JP2013109069A (ja) * | 2011-11-18 | 2013-06-06 | Pentax Ricoh Imaging Co Ltd | 汎用交換レンズ |
| CN107076958A (zh) * | 2014-10-16 | 2017-08-18 | 夏普株式会社 | 相机模块的制造方法和制造装置 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713375B (zh) * | 2013-12-12 | 2016-05-25 | 东莞市南星电子有限公司 | 一种用于定焦镜头对焦的自动调节治具及其调节方法 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07128568A (ja) * | 1993-11-05 | 1995-05-19 | Olympus Optical Co Ltd | レンズ駆動装置 |
| JPH08292351A (ja) * | 1995-04-25 | 1996-11-05 | Minolta Co Ltd | レンズバリア付きカメラ |
| JPH1054933A (ja) * | 1996-08-12 | 1998-02-24 | Olympus Optical Co Ltd | 撮影レンズ装置および撮影方法 |
| JP2005077826A (ja) * | 2003-09-01 | 2005-03-24 | Minolta Co Ltd | カメラユニット |
| JP2005128116A (ja) * | 2003-10-22 | 2005-05-19 | Seiko Precision Inc | 光学モジュール |
| JP2006039480A (ja) * | 2004-07-30 | 2006-02-09 | Nidec Copal Corp | レンズ駆動装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3380049B2 (ja) * | 1994-06-21 | 2003-02-24 | ペンタックス株式会社 | 撮像装置 |
| KR20050067081A (ko) * | 2003-12-26 | 2005-06-30 | 교세라 가부시키가이샤 | 카메라 모듈 및 이 카메라 모듈을 구비한 휴대 단말기 |
-
2006
- 2006-01-27 JP JP2007500599A patent/JPWO2006080443A1/ja active Pending
- 2006-01-27 KR KR1020077017111A patent/KR20070110003A/ko not_active Withdrawn
- 2006-01-27 CN CN2006800032612A patent/CN101107555B/zh not_active Expired - Fee Related
- 2006-01-27 WO PCT/JP2006/301329 patent/WO2006080443A1/ja not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07128568A (ja) * | 1993-11-05 | 1995-05-19 | Olympus Optical Co Ltd | レンズ駆動装置 |
| JPH08292351A (ja) * | 1995-04-25 | 1996-11-05 | Minolta Co Ltd | レンズバリア付きカメラ |
| JPH1054933A (ja) * | 1996-08-12 | 1998-02-24 | Olympus Optical Co Ltd | 撮影レンズ装置および撮影方法 |
| JP2005077826A (ja) * | 2003-09-01 | 2005-03-24 | Minolta Co Ltd | カメラユニット |
| JP2005128116A (ja) * | 2003-10-22 | 2005-05-19 | Seiko Precision Inc | 光学モジュール |
| JP2006039480A (ja) * | 2004-07-30 | 2006-02-09 | Nidec Copal Corp | レンズ駆動装置 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008191423A (ja) * | 2007-02-05 | 2008-08-21 | Sharp Corp | レンズユニット及びカメラモジュール、並びに該カメラモジュールを備えた撮像装置 |
| JP2013109069A (ja) * | 2011-11-18 | 2013-06-06 | Pentax Ricoh Imaging Co Ltd | 汎用交換レンズ |
| CN107076958A (zh) * | 2014-10-16 | 2017-08-18 | 夏普株式会社 | 相机模块的制造方法和制造装置 |
| CN107076958B (zh) * | 2014-10-16 | 2019-06-11 | 夏普株式会社 | 相机模块的制造方法和制造装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101107555A (zh) | 2008-01-16 |
| KR20070110003A (ko) | 2007-11-15 |
| JPWO2006080443A1 (ja) | 2008-06-19 |
| CN101107555B (zh) | 2010-10-06 |
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