CN102314048A - Light irradiating device, camera device and mobile terminal device with a camera - Google Patents
Light irradiating device, camera device and mobile terminal device with a camera Download PDFInfo
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Abstract
The invention provides a light irradiating device which can increase or decrease the light irradiation range with a simple structure, a camera device and a mobile terminal device with a camera. The light irradiating device 1 provided in the invention comprises a driving unit which movably supports an irradiating lens support body 7 of an irradiating lens 6. The driving unit comprises coils 15 which are equipped on the periphery of the irradiating lens support body 7; and magnets 13 equipped on an iron 3 and opposed to the periphery face of the coils 15. The range of the irradiation towards an irradiated object is increased or decreased by moving the irradiating lens support body 7 along the optical axis direction through the electromagnetic force after the coils 15 are electrified.
Description
Technical Field
The present invention relates to a light irradiation device for irradiating light onto an irradiated object, a camera device having the light irradiation device, and a mobile terminal device having a camera.
Background
Patent document 1 (patent publication JP2007-47706 a) discloses a light irradiation device that drives a light source support body by a driving unit to change the irradiation direction of light from a plurality of light sources. The technique described in patent document 1 changes the irradiation range and the light distribution characteristics with respect to the irradiation object by changing the irradiation directions of the light from the plurality of light sources.
Further, patent document 2 (patent publication JP2007-53840 a) discloses a small camera mounted in a mobile phone, in which an optical zoom function is provided.
However, the light irradiation device described in patent document 1 has a structure in which the irradiation directions of light from a plurality of light sources are changed, and has a problem in that it is difficult to obtain a uniform light amount in a light irradiation range.
When the camera is used for shooting and irradiating light to the shooting object, if the light irradiation range is smaller than the shooting visual angle, the light cannot be irradiated on the whole shooting object; if the light irradiation range is larger than the photographing angle of view, the light is diffused excessively to cause waste of power, and the light leakage causes discomfort to the surroundings.
Disclosure of Invention
Accordingly, the present invention provides a light irradiation device, a camera device, and a mobile terminal device with a camera, which can easily expand or reduce a light irradiation range with a simple configuration.
To achieve the above object, a light irradiation device according to the present invention includes: a light source disposed on the fixing body; an irradiation lens that receives light from the light source and irradiates an object to be irradiated; an irradiation lens support body which supports the irradiation lens and is movable in the optical axis direction; and a drive unit that moves the irradiation lens support body in an optical axis direction of the irradiation lens, wherein the drive unit includes: a coil provided along an outer periphery of the irradiation lens support body; and a magnet which is provided on the fixed body and faces the coil, and which expands or contracts an irradiation range with respect to the irradiation object by moving the irradiation lens support in an optical axis direction of the lens by an electromagnetic force generated when the coil is energized.
To achieve the above object, a light irradiation device according to the present invention includes: a light source; an irradiation lens which is provided on the fixed body, receives light from the light source, and irradiates the irradiated body with the light; a light source support body which supports the light source and freely moves the light source in the optical axis direction of the irradiation lens; and a driving unit that moves the light source support body in an optical axis direction of the irradiation lens, wherein the driving unit includes: a coil disposed along an outer periphery of the light source support; and a magnet which is provided on the fixed body and faces the coil, and which expands or contracts an irradiation range with respect to the irradiation object by moving the light source support body in an optical axis direction of the irradiation lens by an electromagnetic force when the coil is energized.
To achieve the above object, a light irradiation device according to the present invention includes: a light source disposed on the fixing body; a reflector that receives light from the light source and reflects the light toward the irradiated object; a reflector support body which supports the reflector and is freely movable in the optical axis direction of the reflected light of the reflector; and a driving unit that moves the reflector support in an optical axis direction of the reflected light, wherein the driving unit includes: a coil disposed along an outer periphery of the reflector support; and a magnet fixed on the fixed body and facing the coil, wherein the reflector support is moved in the optical axis direction of the reflected light of the reflector by the electromagnetic force when the coil is electrified, so as to expand or reduce the irradiation range of the irradiated body.
To achieve the above object, a light irradiation device according to the present invention includes: a light source disposed on the fixing body; an irradiation lens that is provided on the fixed body and irradiates the irradiated body with the received light; a reflector which is provided at a position sandwiching the light source with respect to the irradiation lens and reflects light of the light source toward the irradiation lens; a reflector support which supports the reflector and is freely movable in the direction of the irradiation lens; and a driving unit that moves the reflector support in an optical axis direction of the irradiation lens, wherein the driving unit includes: a coil disposed along an outer periphery of the reflector support; and a magnet disposed on the fixed body and facing the coil, wherein the reflector support is moved in the optical axis direction of the lens by an electromagnetic force generated when the coil is energized, thereby enlarging or reducing an irradiation range of the irradiation object.
To achieve the above object, a light irradiation device according to the present invention includes: a light source disposed on the fixing body; an irradiation lens that receives light from the light source and irradiates an object to be irradiated; a reflector which surrounds a space between the illumination lens and the light source and reflects the received light toward the illumination lens; a lens/reflector support body which integrally supports the irradiation lens and the reflector and is movable in the optical axis direction of the irradiation lens; and a drive unit that moves the lens/reflector support body in an optical axis direction of the irradiation lens, wherein the drive unit includes: a coil provided along the outer periphery of the lens/reflector support body; and a magnet disposed on the fixed body and facing the coil, wherein the lens reflector support is moved in the optical axis direction of the lens by an electromagnetic force generated when the coil is energized, thereby enlarging or reducing the irradiation range of the irradiation object.
To achieve the above object, a camera device according to the present invention includes: the light irradiation device according to any one of the foregoing; and a zoom camera mounted with the optical zoom lens, wherein the zoom camera calculates a photographing angle of view of a magnification set by movement of the optical zoom lens, and the light irradiation device drives the driving unit according to photographing angle of view information received from the zoom camera.
To achieve the above object, a mobile terminal device with a camera is characterized by the camera device described above.
The mobile terminal device includes: a cellular phone, a personal computer (PDA), a personal computer, etc.
According to the light irradiation device: the structure of moving the light source, the irradiation lens or the reflector, the irradiation lens and the reflector on the optical axis of the lens or toward the subject is relatively simple, and the light irradiation range can be easily enlarged or reduced.
Since the irradiation target can be irradiated within a predetermined range by enlarging or reducing the light irradiation range, a uniform amount of light can be provided within the light irradiation range, and light leakage to the surroundings can be reduced.
The driving unit is composed of a coil and a magnet, and is simple in structure, and linearly moves the light source, the lens or the reflector, the lens and the reflector in the optical axis direction of the lens. Since only the supply current to the coil needs to be controlled, the drive control is relatively easy.
Since the light of the light source is condensed by the irradiation lens, this structure can reduce the power consumption of the light source, and thus can reduce the power consumption.
According to the camera device, since the driving unit of the light irradiation device is driven in accordance with the photographing angle of view of the camera, the light irradiation range can be easily enlarged or reduced in cooperation with the photographing angle of view by the camera zoom function.
Drawings
Fig. 1 is an exploded perspective view of a light irradiation device according to embodiment 1 of the present invention.
Fig. 2 is a longitudinal sectional view of the light irradiation device according to embodiment 1.
Fig. 3 is an optical path diagram for explaining the operation of the light irradiation device in embodiment 1.
Fig. 4 is a sectional view a-a shown in fig. 6.
Fig. 5 is a sectional view B-B shown in fig. 4.
Fig. 6 is a front view of the camera according to embodiment 1.
Fig. 7 is a block diagram showing the configuration of the light irradiation device and the control section of the lens driving device in embodiment 1.
Fig. 8 is an exploded perspective view of a light irradiation device in embodiment 2 of the present invention.
FIG. 9 is a longitudinal sectional view of a light irradiation device according to embodiment 2 of the present invention.
Fig. 10 is an exploded perspective view of a light irradiation device according to embodiment 3 of the present invention.
Fig. 11 is a perspective view of the light source support body shown in fig. 10, which is equipped with a light source.
Fig. 12 is a longitudinal sectional view of the light irradiation device according to embodiment 3.
Fig. 13 is an exploded perspective view of a light irradiation device according to embodiment 4 of the present invention.
FIG. 14 is a longitudinal sectional view of the light irradiation device according to embodiment 4.
Description of the symbols:
1 light irradiation device
3 yoke
6 irradiation lens
7 irradiation lens support
7a light source support
7b reflector support
7c lens/reflector support
12 light source
13 magnet
15 coil
19 light reflector
101 lens driving device
Detailed Description
Hereinafter, embodiment 1 of the present invention will be described in detail with reference to fig. 1 to 7 of the drawings. The light irradiation device 1 in the present embodiment is a light irradiation device for an optical zoom camera 4 incorporated in a mobile phone 2 as shown in fig. 7. When photographing with the optical zoom camera 4, the light irradiation device irradiates light to a photographic subject in a dark place as a so-called flash.
As shown in fig. 1 and 2, the light irradiation device 1 includes: a yoke 3 as a fixed body; an irradiation lens support 7 having an irradiation lens 6 mounted on the inner periphery thereof; a frame 8 and a front spring 9 disposed on the yoke 3 on the front side (hereinafter simply referred to as front side) in the optical axis direction of the irradiation lens 6; and a base 5 and a rear side spring 11 disposed on the yoke 3 on the rear side (hereinafter simply referred to as the rear side) in the optical axis direction of the irradiation lens 6. A spacer (insulator) 17 is disposed between the rear side spring 11 and the yoke 3. A light source body 10 on which a light source 12 is arranged is fixed to the chassis 5.
The irradiation lens 6 is a condenser lens, and in the present embodiment, is a convex lens.
The yoke 3 is annular, has a quadrangular outer periphery in plan view when viewed from the front side, has a circular inner periphery in plan view, and is formed by an outer peripheral wall 3 a; an inner peripheral wall 3 b; and a connecting wall 3c connecting the outer peripheral wall 3a and the inner peripheral wall 3 b. The outer and inner peripheral walls 3a, 3b and the connecting wall 3c together have an approximately U-shaped cross section.
The magnet 13 is fixed to the inner periphery of each corner portion 3d of the four corner portions of the yoke 3, and the magnet 13 has different magnetic poles between the inner periphery and the outer periphery, for example, the surface on the inner periphery is an N pole and the surface on the outer periphery is an S pole.
The irradiation lens support 7 is approximately cylindrical, and as shown in fig. 2, is provided on the inner peripheral side of the yoke 3 and is movable in the optical axis direction X of the irradiation lens 6. A coil 15 wound in the circumferential direction is attached to the outer periphery of the irradiation lens support body 7.
As shown in fig. 1, the front side spring 9 is flat in a natural state before being assembled, and is constituted by: an annular outer peripheral side portion 9a having a rectangular shape in plan view; an inner peripheral side portion 9b arranged on the inner periphery of the outer peripheral side portion 9a and having a circular shape in plan view; four arm portions 9c connecting the outer peripheral side portion 9a and the inner peripheral side portion 9 b. In the present embodiment, the outer peripheral portion 9a and the inner peripheral portion 9b of the front spring 9 are divided into four in the circumferential direction.
The rear side spring 11 is flat in a natural state before being assembled, and is constituted by: an annular outer peripheral side portion 11a having a rectangular shape in plan view; an inner peripheral side portion 11b arranged on the inner periphery of the outer peripheral side portion 11a and having a circular shape in plan view; four arm portions 11c connecting the outer peripheral side portion 11a and the inner peripheral side portion 11 b. Further, the outer peripheral side portion 11a and the inner peripheral side portion 11b of the rear side spring 11 are divided into 3 in the circumferential direction.
The outer peripheral side portion 9b of the front spring 9 is sandwiched between the frame 8 and the yoke 3, and the inner peripheral side portion 9a is fixed to the front end of the irradiation lens support 7. The outer peripheral side portion 11b of the rear spring 11 is sandwiched between the base 5 and the rear spacer 17, and the inner peripheral side portion 11a is fixed to the rear end of the irradiation lens support 7. Thus, the irradiation lens support body 7 is supported by the front side spring 9 and the rear side spring 11 so as to be movable in the front-rear direction.
When the irradiation lens support body 7 moves forward, the irradiation lens support body 7 stops at a position where the 1 st force (the resultant force of the forward and backward urging forces of the front spring 9 and the rear spring 11) and the 2 nd force (the electromagnetic force generated between the coil 15 and the magnet 13) are balanced.
The light source 12 is an LED (light emitting diode) in the present embodiment, but may be a discharge tube type flash lamp or a laser light source.
The light source body 10 is provided with a base for supplying LED current, and the supply current is controlled by the control unit 14.
The irradiation lens 6 is a divergent angle conversion element that transmits light from the light source 12 and converts the divergent angle. In the present embodiment, since the light source 12 uses an LED having a large divergence angle, the irradiation lens 6 uses a convex lens to change the small divergence angle. When the light source 12 having a small divergence angle is used, the irradiation lens 6 may be a concave lens. The irradiation lens 6 may be a combination of a plurality of lenses. Further, the irradiation lens 6 may be a fresnel lens, or a lens using a diffraction grating or a hologram. When the irradiation lens 6 is a flat-type lens, the thickness of the lens can be reduced, and the light irradiation device 1 can be made light and thin. Further, if the thickness of the light irradiation device 1 is not changed, the moving range of the irradiation lens support 7 in the optical axis direction can be increased.
In the present embodiment, as shown in fig. 3, when no current flows through the coil 15, the distance between the light source 12 and the irradiation lens 6 is the closest. In this case, the irradiation angle, that is, the divergence angle from the irradiation lens 6 is the largest, and the irradiation range with respect to the irradiation object P is the widest. When current is applied to the coil 15, the irradiation lens support body 7 moves forward, and then the irradiation lens support body 7 stops at a position where the 1 st force (the resultant force of the forward and backward urging forces of the front spring 9 and the rear spring 11) and the 2 nd force (the electromagnetic force generated between the coil 15 and the magnet 13) are balanced. Namely: compared with the case where no current is supplied to the coil 15, the distance between the light source 12 and the irradiation lens 6 is longer, so that the irradiation angle is smaller and the irradiation range with respect to the irradiation object P is narrower.
Next, the optical zoom camera 4 according to the present embodiment will be described with reference to fig. 4 to 6. The optical zoom camera 4 includes: a lens driving device 101 that drives the zoom lens; and a substrate 104 on which the image sensor 11 is mounted.
The lens driving device 101 includes, in a housing: a zoom lens holder 103; a focus lens holder 105; a zoom lens holder driving unit 107 that drives the zoom lens holder 103; and a focus lens driving unit 109 that drives the focus lens holder 105. This lens driving device 101 is mounted on a substrate 104 provided with an image sensor 111. In the present embodiment, the image sensor 111 is a ccd (charge coupled device), but may be a cmos (complementary Metal Oxide semiconductor) or the like.
As shown in fig. 5, the casing 113 includes: a zoom lens position detection unit 143 that detects the position of the zoom lens holder 103; and a focus lens position detection unit 145 that detects the position of the focus lens holder 105.
As shown in fig. 4, the zoom lens holder 103 holds an optical zoom lens 114; the focus lens holder 105 holds a focus lens 116. In the housing 113, a subject side lens 118 and an image side lens 120, and a zoom lens 114 and a focus lens 116 are provided so as to coincide with the optical axis.
Since the zoom lens driving unit 107 and the focus lens driving unit 109 have approximately the same configuration, when describing the zoom lens driving unit 107, the same reference numerals are given to those portions having the same functions and effects as those of the focus lens driving unit 109, and the description thereof will be omitted.
The zoom lens driving unit 107 (focus lens driving unit 109) is composed of a vibrating member 117 and a driving shaft 121(122) arranged in the optical axis direction, and a base end 121a (122a) of the driving shaft 121(122) is fixed to the vibrating member 117. The tip end 121b (122b) of the drive shaft 121(122) is held in the housing 113 by a bearing member 112 holding the drive shaft 121(122) in a slidable manner. The bearing member 112 is made of an elastically deformable member, and in the present embodiment, is made of silicone rubber. Similarly, the bearing member 110 holding the drive shaft 121(122) is slidably attached to the housing 113 on the base end 121a side of the drive shaft 121 (122).
The vibration member 117 is constituted by: a piezoelectric element 123; and an oscillator 119 having elasticity and fixed to the surface of the piezoelectric element 123 by adhesion. The base end 121a of the drive shaft 121 is fixed to the surface of the oscillator 119 by adhesion.
On the other hand, as shown in fig. 4 and 5, a pressure-bonding section 131 for pressure-bonding the drive shafts 121 and 122 is provided at one end of the zoom lens holder 103 (focus lens holder 105). As shown in fig. 5, the crimping portion 131 is crimped to the side surface of the drive shaft 121(122) by a spring 132.
The other end of the zoom lens holder 103 is provided with an engaging portion 133 which engages with the driving shaft 122 of the focus lens holder 105, and the engaging portion 133 engages with the driving shaft 122 of the focus lens holder 105 to guide the movement of the zoom lens holder 103. The joint 133 has a cross section of an approximately U shape with the center side of the zoom lens holder 103 as the bottom, and the drive shaft 122 of the focus lens holder 105 is inserted inside the U shape.
The other end of the focus lens holder 105 is provided with an engaging portion 133 that engages with the driving shaft 121 of the zoom lens holder 103, and the engaging portion 133 engages with the driving shaft 121 of the zoom lens holder 103 to guide the movement of the focus lens holder 105. The joint 133 has a cross section of an approximately U shape with the center side of the focus lens holder 105 as the bottom, and the drive shaft 121 of the zoom lens holder 103 is inserted into the U shape.
The configuration of the focus lens holder 105 is substantially the same as that of the zoom lens holder 103, and a drive shaft 122 of the focus lens holder 105 is mounted on the vibration member 117 at its base end, as is the drive shaft 121 of the zoom lens holder 103.
Next, a zoom lens position detection unit 143 that detects the position of the zoom lens holder 103 and a focus lens position detection unit 145 that detects the position of the focus lens holder 105 as shown in fig. 5 are explained. The zoom lens position detection unit 143 and the focus lens detection unit 145 have the same configuration, and are respectively constituted by: magnetic pole members 157 of different magnetic poles (S-pole and N-pole) disposed alternately in the direction of the optical axis of the lens; and an MR sensor 159 that detects the magnetic field strength. The magnetic pole member 157 is fixed inside the housing 113 along the drive shafts 121 and 122, and the MR sensor 159 is fixed to the holders 103 and 105, and moves together with the holders 103 and 105 in a state of facing the magnetic pole member 157, and can detect the amount of movement and the direction of movement from the reference position (or the initial position) of each holder.
As shown in fig. 6, the front side wall 115 of the housing 113 is square when viewed from the front side in the optical axis direction, and the entire case is a rectangular parallelepiped. As shown in fig. 5, the drive shafts 121, 122 are located on a diagonal line E that is square as viewed from the front side, and a zoom lens position detection unit 143 and a focus lens position detection unit 145 are provided on a diagonal line F perpendicular to this diagonal line E.
As shown in fig. 4 and 6, the subject-side lens holding opening 125 for holding the subject-side lens 118 is formed in the rectangular central portion of the front wall 115 of the housing 113. On the diagonal line E, the drive shafts 121 and 122 are positioned so as to sandwich the subject-side lens holding opening 125, and a fitting recess 127 into which the bearing 112 of each of the drive shafts 121 and 122 is fitted is formed.
As shown in fig. 7, the control section 21 of the camera 4 includes: a zoom setting unit 23; a photographing view angle calculation unit 25; and a viewing angle information recording section 29 for recording the calculated photographing viewing angle and transmitting the viewing angle information to the light irradiation control section 27. On the other hand, the light irradiation control unit 27 includes: a viewing angle information receiving section 31 for receiving the viewing angle information from the viewing angle information recording section 29; and an irradiation range control unit 33.
The zoom setting unit 23 detects the amount of movement of the zoom lens holder 103 of the lens driving device 101, and the imaging angle-of-view calculation unit 25 calculates the imaging angle of view of the camera shown in fig. 3 based on the amount of movement of the zoom lens holder 103, and sends the imaging angle-of-view information obtained by the calculation from the angle-of-view information recording unit 29 to the angle-of-view information receiving unit 31 of the light irradiation control unit 27. The irradiation range control unit 33 moves the irradiation lens support 7 based on the imaging angle of view information so that the light irradiation angle (irradiation angle) is slightly larger than the imaging angle of view, for example, 1 to 5 degrees larger than the imaging angle of view. In this way, the irradiation lens 6 can change the irradiation angle according to the imaging angle of view, and irradiate the subject in the most appropriate light irradiation range.
Next, the operation and effects of the light irradiation device 1 according to the embodiment of the present invention will be described.
When the light irradiation device 1 is used for photographing with the camera 4, as described above, the zoom setting unit 23 moves the zoom lens holder 103 to a predetermined photographing magnification position, and accordingly, the angle-of-view calculating unit 25 calculates the photographing angle of view of the camera, and in the light irradiation device 1, the irradiation lens support body 7 is moved so that the irradiation angle is slightly larger than the photographing angle of view by the irradiation range control unit 33.
In this case, as shown in fig. 2, in the light irradiation device 1, the coil 15 is energized to generate an electromagnetic force, and a thrust force F is generated between the coil and the magnet 13, so that the irradiation lens support body 7 is stopped at a position balanced with the biasing forces of the front side spring 9 and the rear side spring 11.
Then, a current is supplied to the light source 12 in conjunction with the shutter of the camera 4, and the light source 12 emits light to irradiate the subject with light.
That is, according to embodiment 1, as shown in fig. 3, the irradiation range can be enlarged or reduced by moving the position of the irradiation lens 6 in accordance with the photographing angle of view.
According to the present embodiment, the light from the light source 12 is condensed by the irradiation lens 6, and thus, a predetermined amount of light can be applied to the irradiation target with a small power consumption, and the power consumption of the light source 12 can be reduced. That is, since the irradiation range of light is enlarged or reduced according to the photographing range of the camera by moving the irradiation lens 6 in the optical axis direction of the lens, light leakage to the periphery of the subject P can be reduced and a sufficient amount of light can be provided to the subject.
The driving means for linearly moving the irradiation lens 6 in the optical axis direction of the lens is constituted by the coil 15 and the magnet 13, and the structure is simple, and the driving control can be easily performed only by controlling the current passing through the coil 15.
Since the lens support 7 is moved by the irradiation range control unit 33 in accordance with the angle of view calculated by the angle of view calculation unit 25 in accordance with the movement position of the optical zoom lens 116 of the optical zoom camera 4, the light irradiation range in conjunction with the camera shooting can be controlled.
Next, another embodiment of the present invention will be described. In the following description of the other embodiments, the same reference numerals are given to the portions having the same functions and effects as those of the above-described embodiments, and the description of the portions is omitted. In the following description, the points different from the above-described embodiments will be mainly described.
Embodiment 2 of the present invention will be described with reference to fig. 8 and 9. In embodiment 2, the irradiation lens support 7 in embodiment 1 is replaced with a light source support 7a that supports the light source 12, and the irradiation lens 6 is fixed to the holder 8. That is, in embodiment 2, in contrast to embodiment 1, the irradiation lens 6 is fixed, and the light source 12 is moved by the light source support 7a to change the irradiation angle and enlarge or reduce the irradiation range of light.
According to embodiment 2, the same operational effects as those of embodiment 1 can be obtained. Further, since the LED is used as the light source and is lighter than the irradiation lens 6, the response of the present embodiment (moving the light source 12) is faster than that of the embodiment 1 (moving the irradiation lens). For powering the light source 12, at least one of the front side spring 9 or the rear side spring 11 may be used.
The light source 12 irradiates light in the direction opposite to the irradiated object. The reflector 19 is provided at a position sandwiching the light source 12 with respect to the object to be irradiated, and reflects light from the light source 12 toward the object to be irradiated. In the present embodiment, the reflector 19 employs a concave mirror. The irradiation lens 6 is a convex lens.
According to embodiment 3, the same effects as those of embodiment 1 can be obtained.
Further, since the reflector 19 can be made of aluminum or the like to be a relatively light reflector 19, the response of expanding or contracting the irradiation range of the present embodiment of the movable reflector support 7b is relatively faster than that of the 1 st embodiment of the movable lens support 7. Further, since the irradiation angle can be set by two members, i.e., the reflector 19 and the irradiation lens 6, the degree of freedom in design is high.
In the present embodiment, although the reflector 19 uses a concave mirror, it does not matter if a light source 12 having a small divergence angle is used, a convex mirror is used. Also, the reflector 19 may be a fresnel mirror. Furthermore, the reflector 19 may be a plane mirror. In this case, the irradiation angle can be set only by the irradiation lens 6. Since the light-weight reflector 19, which does not require wiring, is provided on the reflector support 7b, the movement of the light-weight reflector support 7b not only provides a quick response, but also facilitates the stabilization of the posture of the reflector support 7 b. Further, the irradiation lens 6 may be eliminated. That is, the irradiation range of the irradiation object is expanded or reduced only by the reflector 19. In this case, in addition to the relatively fast response of enlarging or reducing the irradiation range, the weight of the irradiation lens 6 can be reduced.
Embodiment 4 of the present invention will be described with reference to fig. 13 and 14. The configuration of embodiment 4 is as follows: the irradiation lens 6 and the reflector 19 are fixed to a lens/reflector support 7c, and the lens/reflector support 7c is moved in the optical axis direction X of the irradiation lens 6.
The irradiation lens 6 is composed of a lens main body 6a and a frame portion 6b, and the lens main body 6a and the frame portion 6b are manufactured by integral molding using a transparent resin. A concave corner 6c is formed at the intersection between the frame 6b and the rear side of the lens body 6 a.
The reflector 19 covers the space between the light source 12 and the irradiation lens 6, and a hole 19a is formed in the bottom of the light source 12 side, and the light source 12 is disposed in the hole 19 a. In the present embodiment, the size of the hole 19a is slightly larger than the outer shape of the light source 12. The reflector 19 has a parabolic longitudinal section on the rear surface thereof, and light received directly from the light source 12 is reflected toward the irradiation lens 6 in a direction parallel to the optical axis of the irradiation lens 6.
The front side end 19b of the reflector 19 contacts the corner 6c between the lens body 6a and the frame portion 6b of the irradiation lens 6 and is fixed with an adhesive.
The lens reflector 7c is formed in a ring shape, and is fixed to the contact portion by bonding while contacting the outer side surface of the reflector 19. A coil 15 is fixed to the rear end of the lens/reflector support 7 c. The coil 15 has a rectangular shape in plan view when viewed from the front side.
The inner side walls 3b of the yoke 13 are provided at positions corresponding to the respective corner portions 3d of the outer peripheral wall 3 a. That is, as shown in fig. 12, the coil 15 is disposed between the outer peripheral wall 3a of the yoke 3 and the magnet 13.
Further, an outer frame 22 is provided on the outer periphery of the yoke 3, and a mounting member 24 for mounting the light source body 10 is provided on the front surface of the base 5.
According to embodiment 4, the same operational effects as those of embodiment 1 can be obtained.
Further, the space between the light source 12 and the irradiation lens 6 is covered with the reflector 19, and the light which cannot be directly irradiated from the light source 12 to the irradiation lens 6 is reflected to the irradiation lens by the reflector 19, so that the light condensing efficiency of the light source 12 is good.
The magnet 13 is fixed to the outer peripheral surface of the inner wall 3b of the yoke 3, and the coil 15 is disposed between the outer peripheral wall 3a and the magnet 13, so that leakage of the magnetic flux of the magnet 13 to the outside of the yoke 3 can be reduced.
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. For example, in the above embodiment, the light irradiation device 1 is a flash of a camera in a mobile phone with a camera. However, the present invention is not limited to this, and may be used in a microscope and a projection apparatus.
A position detector for detecting the position of the irradiation lens support 7 may be provided in the light irradiation device 1, and feedback control may be performed as to whether or not the irradiation lens support 7 is present at the position of the set light irradiation angle.
In embodiment 4, the lens/reflector support 7c may be fixed to the frame 6b of the lens 6, not to the reflector 19. The lens 6 and the reflector 19 may be fixed to the lens/reflector support 7c separately.
In embodiment 4, the shape and arrangement of the coil 15, the magnet 13, and the yoke 3 may be the same as those of embodiment 1. In embodiments 1 to 3, the shape and arrangement of the coil 15, the magnet 13, and the yoke 3 may be the same as those of embodiment 4.
Claims (7)
1. A light irradiation device comprising:
a light source disposed on the fixing body;
an irradiation lens that receives light from the light source and irradiates an object to be irradiated;
an irradiation lens support body which supports the irradiation lens and is movable in the optical axis direction; and
a drive unit which moves the irradiation lens support body in the optical axis direction of the irradiation lens;
wherein,
a drive unit having:
a coil provided along an outer periphery of the irradiation lens support body; and
a magnet disposed on the fixed body and facing the coil,
the irradiation range of the irradiation object is enlarged or reduced by moving the irradiation lens support in the optical axis direction of the lens by the electromagnetic force when the coil is energized.
2. A light irradiation device comprising:
a light source;
an irradiation lens which is provided on the fixed body, receives light from the light source, and irradiates the irradiated body with the light;
a light source support body which supports the light source and freely moves the light source in the optical axis direction of the irradiation lens; and
a driving unit for moving the light source support body in the optical axis direction of the irradiation lens,
wherein,
a drive unit having:
a coil disposed along an outer periphery of the light source support; and
a magnet disposed on the fixed body and facing the coil,
the light source support is moved in the optical axis direction of the irradiation lens by an electromagnetic force generated when the coil is energized, thereby enlarging or reducing the irradiation range of the irradiation object.
3. A light irradiation device comprising:
a light source disposed on the fixing body;
a reflector that receives light from the light source and reflects the light toward the irradiated object;
a reflector support body which supports the reflector and is freely movable in the optical axis direction of the reflected light of the reflector; and
a driving unit which moves the reflector support in the optical axis direction of the reflected light,
wherein,
a drive unit having:
a coil disposed along an outer periphery of the reflector support; and
a magnet fixed on the fixed body and opposite to the coil,
the irradiation range of the irradiated object is expanded or reduced by moving the reflector support in the optical axis direction of the reflected light of the reflector by the electromagnetic force generated when the coil is energized.
4. A light irradiation device comprising:
a light source disposed on the fixing body;
an irradiation lens that is provided on the fixed body and irradiates the irradiated body with the received light;
a reflector which is provided at a position sandwiching the light source with respect to the irradiation lens and reflects light of the light source toward the irradiation lens;
a reflector support which supports the reflector and is freely movable in the direction of the irradiation lens; and
a driving unit for moving the reflector support in the optical axis direction of the irradiation lens,
wherein,
a drive unit having:
a coil disposed along an outer periphery of the reflector support; and
a magnet disposed on the fixed body and facing the coil,
the irradiation range of the irradiation object is enlarged or reduced by moving the reflector support in the optical axis direction of the lens by an electromagnetic force generated when the coil is energized.
5. A light irradiation device comprising:
a light source disposed on the fixing body;
an irradiation lens that receives light from the light source and irradiates an object to be irradiated;
a reflector which surrounds a space between the illumination lens and the light source and reflects the received light toward the illumination lens;
a lens/reflector support for supporting the irradiation lens and the reflector integrally and freely in the optical axis direction of the irradiation lens
Moving; and
a driving unit for moving the lens/reflector support body in the optical axis direction of the irradiation lens,
wherein,
a drive unit having:
a coil provided along the outer periphery of the lens/reflector support body; and
a magnet disposed on the fixed body and facing the coil,
the lens and reflector support are moved in the optical axis direction of the lens by an electromagnetic force generated when the coil is energized, thereby enlarging or reducing the irradiation range of the irradiation object.
6. A camera device, comprising:
the light irradiation device according to any one of claims 1 to 5; and
a zoom camera mounted with an optical zoom lens,
wherein,
the zoom camera calculates a photographing angle of view of a magnification set by movement of the optical zoom lens,
the light irradiation device drives the drive unit according to the shooting angle of view information received from the zoom camera.
7. A camera-attached mobile terminal device having the camera device according to claim 6 mounted thereon.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-153699 | 2010-07-06 | ||
| JP2010153699 | 2010-07-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102314048A true CN102314048A (en) | 2012-01-11 |
Family
ID=45427334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101877727A Pending CN102314048A (en) | 2010-07-06 | 2011-07-06 | Light irradiating device, camera device and mobile terminal device with a camera |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2012032810A (en) |
| CN (1) | CN102314048A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436119A (en) * | 2010-09-29 | 2012-05-02 | 思考电机（上海）有限公司 | Light irradiation device, carema and mobile terminal device having photographing function |
| CN103278999A (en) * | 2013-05-23 | 2013-09-04 | 明基电通有限公司 | Auxiliary optical device and image capture system comprising auxiliary optical device |
| CN106027892A (en) * | 2016-05-30 | 2016-10-12 | 联想(北京)有限公司 | Flash lamp device, adjusting method and electronic apparatus |
| WO2019183808A1 (en) * | 2018-03-27 | 2019-10-03 | 深圳市大疆创新科技有限公司 | Control method, control device, imaging system, aircraft and storage medium |
| CN111654636A (en) * | 2020-06-30 | 2020-09-11 | 西安易朴通讯技术有限公司 | Shooting method and device, electronic equipment and storage medium |
| CN112198618A (en) * | 2014-07-24 | 2021-01-08 | Lg伊诺特有限公司 | Lens moving device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6414400B2 (en) * | 2014-07-04 | 2018-10-31 | ミツミ電機株式会社 | Lens holder driving device and camera-equipped mobile terminal |
| KR102497828B1 (en) | 2018-02-23 | 2023-02-08 | 엘지이노텍 주식회사 | Camera module |
| CN114815457B (en) * | 2022-06-29 | 2023-05-23 | 深圳市爱图仕影像器材有限公司 | Lighting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436119B (en) * | 2010-09-29 | 2014-06-18 | 思考电机（上海）有限公司 | Light irradiation device, carema and mobile terminal device having photographing function |
| CN102436119A (en) * | 2010-09-29 | 2012-05-02 | 思考电机（上海）有限公司 | Light irradiation device, carema and mobile terminal device having photographing function |
| CN103278999A (en) * | 2013-05-23 | 2013-09-04 | 明基电通有限公司 | Auxiliary optical device and image capture system comprising auxiliary optical device |
| CN112198618A (en) * | 2014-07-24 | 2021-01-08 | Lg伊诺特有限公司 | Lens moving device |
| CN112198617B (en) * | 2014-07-24 | 2024-05-10 | Lg伊诺特有限公司 | Lens moving device |
| CN112198618B (en) * | 2014-07-24 | 2023-08-22 | Lg伊诺特有限公司 | Lens moving device |
| US11442286B2 (en) | 2014-07-24 | 2022-09-13 | Lg Innotek Co., Ltd. | Lens moving apparatus |
| CN112198617A (en) * | 2014-07-24 | 2021-01-08 | Lg伊诺特有限公司 | Lens moving device |
| CN106027892A (en) * | 2016-05-30 | 2016-10-12 | 联想(北京)有限公司 | Flash lamp device, adjusting method and electronic apparatus |
| CN106027892B (en) * | 2016-05-30 | 2019-12-24 | 联想(北京)有限公司 | Flash lamp device, adjusting method and electronic equipment |
| CN110622064A (en) * | 2018-03-27 | 2019-12-27 | 深圳市大疆创新科技有限公司 | Control method, control device, imaging system, aircraft, and storage medium |
| WO2019183808A1 (en) * | 2018-03-27 | 2019-10-03 | 深圳市大疆创新科技有限公司 | Control method, control device, imaging system, aircraft and storage medium |
| CN111654636A (en) * | 2020-06-30 | 2020-09-11 | 西安易朴通讯技术有限公司 | Shooting method and device, electronic equipment and storage medium |
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|---|---|
| JP2012032810A (en) | 2012-02-16 |
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Application publication date: 20120111 |