WO2022145992A1 - 카메라 모듈 - Google Patents
카메라 모듈 Download PDFInfo
- Publication number
- WO2022145992A1 WO2022145992A1 PCT/KR2021/020083 KR2021020083W WO2022145992A1 WO 2022145992 A1 WO2022145992 A1 WO 2022145992A1 KR 2021020083 W KR2021020083 W KR 2021020083W WO 2022145992 A1 WO2022145992 A1 WO 2022145992A1
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- WO
- WIPO (PCT)
- Prior art keywords
- camera module
- control member
- path control
- optical path
- image sensor
- 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.)
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Classifications
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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
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
-
- 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
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
-
- 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
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
-
- 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
-
- 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
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/681—Motion detection
- H04N23/6812—Motion detection based on additional sensors, e.g. acceleration sensors
-
- 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
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/686—Vibration or motion blur correction performed by mechanical compensation with a variable apex prism
-
- 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
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0007—Movement of one or more optical elements for control of motion blur
-
- 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
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0007—Movement of one or more optical elements for control of motion blur
- G03B2205/0023—Movement of one or more optical elements for control of motion blur by tilting or inclining one or more optical elements with respect to the optical axis
Definitions
- the embodiment relates to a camera module having improved performance.
- the camera module captures an object and stores it as an image or video, and is installed in various applications.
- the camera module is produced in a very small size and is applied to not only portable devices such as smartphones, tablet PCs, and laptops, but also drones and vehicles to provide various functions.
- the optical system of the camera module may include an imaging lens that forms an image and an image sensor that converts the formed image into an electrical signal.
- the camera module may perform an autofocus (AF) function of aligning the focal lengths of the lenses by automatically adjusting the distance between the image sensor and the imaging lens, and a distant object through a zoom lens It is possible to perform a zooming function of zooming up or zooming out by increasing or decreasing the magnification of .
- the camera module employs image stabilization (IS) technology to correct or prevent image stabilization due to camera movement caused by an unstable fixing device or a user's movement.
- IS image stabilization
- Such image stabilization (IS) technology includes an optical image stabilizer (OIS) technology and image stabilization prevention technology using an image sensor.
- OIS technology is a technology that corrects motion by changing the path of light
- image shake prevention technology using an image sensor is a technology that compensates movement in both mechanical and electronic ways.
- the optical image shake prevention (OIS) technology includes a reflective member, a driving member, etc. that can change the path of light, and the camera module controls the position of the reflective member with the driving force of the driving member to control the path of the light can control
- the camera module may include a sensor that detects a change in angular velocity due to shaking, and may control the position of the reflective member based on the amount of change in angular velocity sensed by the sensor.
- the camera module corrects for the shake based on the change in angular velocity when the shake occurs, but does not perform the shake correction according to the change in the position of the camera module. For this reason, there is a problem in that it is difficult to effectively operate the shake correction function when the subject is located in a short distance. Therefore, a new camera module capable of solving the above-described problem is required.
- An embodiment is to provide a camera module with improved optical characteristics.
- An embodiment is to provide a camera module capable of effectively correcting image shake that occurs when photographing a subject located at various distances.
- An embodiment is to provide a camera module having a slim and compact structure. The embodiment is intended to provide a camera module applicable to a folded (folded) camera having a thin thickness.
- the camera module is disposed on a movement path of light reflected by a subject, a first light path control member for reflecting light incident in a first direction in a second direction perpendicular to the first direction, the first light
- a first driving member connected to the furnace control member and controlling the movement of the first optical path control member, a lens unit disposed on the movement path of the light and including at least one lens, and sensing the light passing through the lens unit
- An image sensor, a sensing unit for sensing angular velocity and acceleration changed by shaking, and a controller for tilting the first optical path control member to a first axis or a second axis based on the angular velocity and acceleration changed by the shaking may include It may include a third direction perpendicular to the first and second directions, and the first optical path control member may be provided to be tiltable in each of the second and third directions as a rotation axis.
- the tilt angle of the first light path control member may satisfy Equation 1 below.
- Equation 1 L denotes a distance from the subject, ⁇ x denotes an angle at which the first optical path control member tilts in the second direction as an axis, and ⁇ y denotes the first optical path control member It means an angle of tilting the third direction as an axis, ⁇ x means an angular change amount of the camera module with respect to the second direction obtained by the control unit, and ⁇ y is for the third direction obtained by the controller Means the angular change amount of the camera module, Tx means the position change amount of the camera module with respect to the second direction obtained by the control unit, Ty is the camera module with respect to the third direction obtained by the control unit It means the amount of position change.)
- the optical axis of the lens unit may be perpendicular to the upper surface of the image sensor.
- the sensing unit may include a first sensor detecting a change in angular velocity of the camera module and a second sensor detecting a change in acceleration of the camera module.
- the camera module is disposed on a movement path of light reflected by a subject, a first light path control member for reflecting light incident in a first direction in a second direction perpendicular to the first direction, the first light
- a first driving member connected to the furnace control member and controlling the movement of the first optical path control member
- a lens unit disposed on the movement path of the light and including at least one lens, and sensing the light passing through the lens unit
- It may include a control unit for controlling the tilt angle of the optical path control member and the position of the image sensor.
- the present invention may include a third direction perpendicular to the first and second directions, and the first optical path control member may be provided to be tiltable as a rotation axis in each of the second and third directions.
- the tilt angle of the first light path control member may satisfy Equation 2 below.
- ⁇ x denotes an angle at which the first optical path control member tilts in the second direction as an axis
- ⁇ y denotes an angle at which the first optical path control member tilts in the third direction as an axis.
- ⁇ x means an angular change amount of the camera module with respect to the second direction obtained by the controller
- ⁇ y means an angular change amount of the camera module with respect to the third direction obtained by the controller.
- the moving distance of the image sensor may satisfy Equation 3 below.
- L means the distance to the subject
- FL means the entire focal length of the lens unit.
- Tx is the means the amount of change in position
- Ty means the amount of change in the position of the camera module with respect to the third direction obtained by the controller
- Sz means the distance the image sensor moves in the first direction
- Sy is It means the distance the image sensor moves in the third direction.
- the height in the first direction of the second driving member may be lower than the height in the first direction of the first light path control member.
- An optical axis of the lens unit may be perpendicular to an upper surface of the image sensor.
- the present invention further comprising a second optical path control member disposed between the lens unit and the image sensor, wherein the second optical path control member transmits the light incident in the second direction to the first direction can be reflected.
- the moving distance of the image sensor may satisfy Equation 4 below.
- Tx is the amount of change in the position of the camera module with respect to the second direction obtained by the controller.
- Ty denotes the amount of change in the position of the camera module with respect to the third direction calculated by the controller
- Sx denotes the distance the image sensor moves in the second direction
- Sy denotes the image It means the distance the sensor moves in the third direction.
- the height in the first direction of the second light path control member may be lower than the height in the first direction of the first light path control member.
- An optical axis of the lens unit may be parallel to an upper surface of the image sensor.
- the camera module according to the embodiment has improved optical characteristics and can effectively compensate image shake.
- the camera module may control the tilt angle of the first optical path control member based on changes in angular velocity and acceleration due to shaking. Accordingly, the camera module according to the embodiment can effectively compensate for shaking due to rotation and position change when photographing a subject located at infinity or near-field.
- the camera module according to the embodiment may control the tilt angle of the first optical path control member based on the change in angular velocity due to shaking, and may control the position of the image sensor based on the change in acceleration due to the shaking. Accordingly, the camera module according to the embodiment can effectively compensate for shaking due to rotation and position change when photographing a subject located at infinity or near-field.
- the camera module according to the embodiment may include at least one optical path control member. Accordingly, the camera module can be applied to a folded camera that can have a thinner thickness, and a device including the camera module can be manufactured to be slim.
- FIG. 1 is a configuration diagram of a camera module according to an embodiment.
- FIG. 2 is a view for explaining that the camera module according to the embodiment corrects shake.
- 3 and 4 are views showing the arrangement of the camera module according to the embodiment.
- FIG 5 is another view showing the arrangement of the components of the camera module according to the embodiment.
- FIG 6 is another view showing the arrangement of the components of the camera module according to the embodiment.
- FIG. 7 is a diagram illustrating that the camera module according to the embodiment is applied to a mobile terminal.
- a component when it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component is directly connected, coupled or connected to the other component, as well as the component It may also include cases where an element is 'connected', 'coupled' or 'connected' by another element between the element and another element.
- top (above) or under (below) is a case in which two components are in direct contact with each other, as well as one
- another component as described above when expressed as "upper (upper) or lower (lower)", it may include the meaning of an upward direction based on one component, as well as a downward direction.
- the convex surface of the lens may mean that the lens surface has a convex shape in the optical axis of the lens
- the concave lens surface may mean that the lens surface has a concave shape in the optical axis of the lens.
- object side may mean a surface of the lens facing the object side based on the movement path of light
- image side may mean a surface of the lens facing the image sensor.
- the object-side surface may be an incident surface on which light is incident, and the upper surface may be a sensor-side surface or an exit surface on which light is emitted.
- FIG. 1 is a configuration diagram of a camera module according to an embodiment
- FIG. 2 is a diagram for explaining that the camera module according to the embodiment corrects shake
- FIGS. 3 and 4 are views showing the arrangement of the camera module according to the embodiment.
- the camera module 1000 includes a lens unit 100 , an image sensor 300 , a first optical path control member 400 , a first driving member 500 and sensing. may include a portion 700 .
- the lens unit 100 may be disposed on a movement path of light reflected by the subject.
- the lens unit 100 may include a housing and at least one lens.
- the housing may accommodate the at least one lens.
- the housing may support the at least one lens.
- the lens may be provided in a plurality of two or more.
- the plurality of lenses may include at least one of glass and plastic. The plurality of lenses may be sequentially disposed along the optical axis of the lens unit 100 from the subject side to the image side direction.
- the optical axis of the lens unit 100 may be perpendicular to the upper surface of the image sensor 300 .
- Each of the plurality of lenses may include an effective area and an ineffective area.
- the effective area may be an area through which light incident on each of the plurality of lenses passes. That is, the effective region may be a region in which incident light implements optical properties.
- the ineffective area may be disposed around the effective area.
- the ineffective area may be an area to which the light is not incident. That is, the ineffective region may be a region independent of the optical characteristic.
- the ineffective region may be a region fixed to the housing or the like.
- the lens unit 100 may control a path of light reflected by the subject.
- each of the plurality of lenses may have positive (+) or negative (-) refractive power, and may have a set shape and thickness. Accordingly, the lens unit 100 may control the path of the light by diffusing, scattering, refraction, and condensing the light reflected by the subject.
- the lens unit 100 may have a set angle of view (FOV). Also, the lens unit 100 may have a set effective focal length (EFL). The effective focal length EFL of the lens unit 100 may be fixed or variable within a set range.
- the image sensor 300 may be disposed on a movement path of light reflected by the subject. For example, the lens unit 100 may be disposed between the subject and the image sensor 300 . The image sensor 300 may be disposed on a substrate (not shown).
- the substrate is electrically connected to the image sensor 300 and can be physically supported.
- the substrate may be a circuit board.
- the substrate may include a wiring layer for supplying power to the image sensor 300 , and may be a printed circuit board (PCB) formed of a plurality of resin layers.
- the substrate may include at least one of a rigid PCB (Rigid PCB), a metal core PCB (MCPCB, Metal Core PCB), a flexible PCB (FPCB, Flexible PCB), and a Rigid Flexible PCB (RFPCB).
- the substrate may include a synthetic resin including glass, resin, epoxy, and the like, and may include a ceramic having excellent thermal conductivity and a metal having an insulated surface.
- the substrate may have a shape such as a plate or a lead frame, but is not limited thereto.
- a Zener diode, a voltage regulator, and a resistor may be further disposed on the substrate, but the present invention is not limited thereto.
- An insulating layer (not shown) or a protective layer (not shown) may be disposed on the substrate.
- the insulating layer or the protective layer may be disposed on at least one of one surface and the other surface of the substrate.
- the image sensor 300 may be disposed on the substrate.
- the image sensor may be in direct contact with the upper surface of the substrate and may be electrically connected to the substrate.
- the image sensor 300 may detect light reflected by the subject and incident on the camera module 1000 .
- the image sensor 300 may detect the light passing through the lens unit 100 .
- the image sensor 300 may detect light sequentially passing through the plurality of lenses.
- the image sensor 300 may include a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).
- the first light path control member 400 may be disposed on a movement path of the light reflected by the subject.
- the first optical path control member 400 may be disposed closer to the subject than the lens unit 100 . That is, the first optical path control member 400 , the lens unit 100 , and the image sensor 300 may be disposed in order from the subject side to the image side.
- the first optical path control member 400 may change the path of the light incident from the outside.
- the first light path control member 400 may include a reflector and a prism.
- the first optical path control member 400 may include a right-angle prism. When the first optical path control member 400 includes a right-angle prism, the first optical path control member 400 may reflect the path of the light incident on the camera module 1000 at an angle of 90 degrees.
- the first light path control member 400 may change the path of the light reflected by the subject in a set direction.
- the first optical path control member 400 reflects the light incident in the first direction (z-axis direction) to the first optical path control member 400 to determine the path of the light to the lens unit 100 .
- the camera module 1000 When the camera module 1000 includes the first optical path control member 400, it can be applied to a folded camera capable of reducing the thickness.
- the plurality of lenses of the lens unit 100 in the device are directed in a direction perpendicular to the surface of the device. can be extended and arranged. Accordingly, the camera module 1000 including the plurality of lenses has a high height in a direction perpendicular to the surface of the device, and thus it is difficult to form a thin thickness of the camera module 1000 and the device including the same.
- the camera module 1000 when the camera module 1000 includes the first optical path control member 400 , the camera module 1000 transmits light incident in a direction perpendicular to the surface of the applied device parallel to the surface of the device.
- the plurality of lenses of the lens unit 100 may be arranged to extend in a direction parallel to the surface of the device, and the optical axis of the lens unit 100 may be arranged to be parallel to the surface of the device. Accordingly, the camera module 1000 including the lens unit 100 may have a low height in a direction perpendicular to the surface of the device, and thus may have a thinner thickness in the device, and thus the device The thickness of may also be made thinner.
- the first driving member 500 may be connected to the first optical path control member 400 .
- the first driving member 500 may include at least one actuator.
- the first driving member 500 may include at least one of a voice coil motor (VCM), a piezo-electric device, a shape memory alloy, and a MEMS device as an actuator.
- the first driving member 500 may move the first optical path control member 400 by using the driving force of the actuator.
- the first driving member 500 may tilt the first optical path control member 400 along a first axis or a second axis.
- the first driving member 500 may tilt the first optical path control member 400 in a second direction (x-axis direction) as a rotation axis.
- the first driving member 500 may tilt the first optical path control member 400 in a third direction (y-axis direction) as a rotation axis. Accordingly, the camera module 1000 may correct the shake.
- the detection unit 700 may detect the shaking of the camera module 1000 .
- the sensing unit 700 may detect a change in rotation and position applied to the camera module 1000 .
- the sensing unit 700 may include a first sensor 710 and a second sensor 720 .
- the first sensor 710 may be a sensor that detects a change in angular velocity of the camera module 1000 .
- the first sensor 710 may include a gyro sensor.
- the second sensor 720 may be a sensor that detects a change in acceleration of the camera module 1000 .
- the second sensor 720 may include an acceleration sensor.
- the sensing unit 700 may detect an angular velocity and an acceleration changed by shaking of the camera module 1000 using the first sensor 710 and the second sensor 720 .
- the camera module 1000 may include a filter (not shown).
- the filter may be disposed between the lens unit 100 and the image sensor 300 .
- the filter may be disposed between the image sensor 300 and a lens closest to the image sensor 300 among the plurality of lenses of the lens unit 100 .
- the filter may include at least one of an infrared filter and an optical filter such as a cover glass.
- the filter may pass light of a set wavelength band and filter light of a different wavelength band. When the filter includes an infrared filter, radiant heat emitted from external light may be blocked from being transmitted to the image sensor 300 .
- the filter may transmit visible light and reflect infrared light.
- the camera module 1000 may include a controller 750 .
- the control unit 750 may control a signal applied to the first driving member 500 based on the information sensed by the sensing unit 700 .
- the control unit 750 may control the movement of the first optical path control member 400 by controlling the voltage, current, etc. applied to the first driving member 500 .
- the sensing unit 700 may detect information about the shaking, and the controller 750 may correct the shaking.
- the first sensor 710 may detect a change in angular velocity and the second sensor 720 may detect a change in acceleration .
- the detection unit 700 may calculate the degree of shaking of the camera module 1000, for example, the degree of rotation and the degree of position change based on the change detected by the first sensor 710 and the second sensor 720 . have.
- the control unit 750 may correct a feedback value for the signal detected by the sensing unit 700 .
- the feedback value correction may be a correction for removing noise and the like from the angular velocity and acceleration change information detected by the sensing unit 700 .
- the feedback value correction may mean correcting a signal to be applied to the first driving member 500 for controlling the first optical path control member 400 based on the obtained information.
- the control unit 750 may provide the corrected signal to the first driving member 500 .
- the first optical path control member 400 may be tilted to a first axis or a second axis by a signal applied from the control unit 750 , and may prevent shaking due to rotation and position change of the camera module 1000 . can be corrected Accordingly, the camera module 1000 according to the embodiment can effectively correct shake caused by rotation and shake caused by a change in position when photographing a subject located in infinity or near. Accordingly, the camera module 1000 may have improved optical properties.
- Table 1 shows the position change of pixels according to the occurrence of shake in the camera module.
- Table 1 is an experimental example of measuring the number of pixels moving according to shaking using a camera module having a field of view (FOV) of 20 degrees and a pixel size of the image sensor 300 of about 0.7 ⁇ m. Referring to it, it can be seen that about 432 pixels are moved when shaking due to rotation occurs when photographing a subject located at a short distance (25 mm) or infinity. That is, it can be seen that the number of pixels moving when shake occurs due to rotation has no significant effect on the distance from the subject.
- FOV field of view
- shake correction is performed based on an angular velocity that changes when shake occurs, and separate shake correction is not performed based on an acceleration change according to a change in position.
- a subject located at a distance may be photographed using a conventional camera module.
- the conventional camera module performed shake correction by rotation based on the change in angular velocity.
- Table 1 shows how the subject is located at a relatively long distance, as shown in Table 1 above, there is little or very little change in position due to shaking, so the correction according to the change in position is not separately performed.
- a subject located in a short distance may be photographed using a conventional camera module.
- shake correction by rotation was performed based on the change in angular velocity, but correction according to the change in position was not separately performed. Accordingly, there is a problem in that when a subject located at an intermediate distance or a short distance is photographed, shake due to a change in position is not effectively corrected.
- the camera module 1000 according to the embodiment may perform shake correction according to rotation and position change when photographing a subject.
- the camera module 1000 may correct shake by tilting the first optical path control member 400 along a first axis or a second axis, and a tilt angle of the first optical path control member 400 . may satisfy Equation 1 below.
- Equation 1 L denotes a distance from the subject.
- ⁇ x denotes an angle at which the first light path control member 400 tilts in the second direction as an axis
- ⁇ y denotes an angle at which the first optical path control member 400 tilts in the third direction as an axis means
- ⁇ x means an angular change amount of the camera module 1000 with respect to the second direction obtained by the controller 750
- ⁇ y is the camera module with respect to the third direction obtained by the controller 750 (1000) means the amount of angular change.
- Tx means the amount of change in the position of the camera module 1000 in the second direction obtained by the controller 750
- Ty is the camera module 1000 in the third direction calculated by the controller 750.
- the camera module 1000 may set the tilt angle of the first optical path control member 400 based on the angular velocity and the amount of acceleration detected by the sensing unit 700 .
- the control unit 750 may set the tilt angle of the first optical path control member 400 in consideration of rotation and position change due to shaking. Accordingly, when photographing a subject located at infinity or near-field, the camera module 1000 can effectively correct shake due to rotation and position change.
- FIG. 5 is another view showing the arrangement of the components of the camera module according to the embodiment.
- descriptions of the same and similar components as those of the camera module described above are omitted, and the same reference numerals are assigned to the same and similar components.
- the camera module 1000 includes a lens unit 100 , an image sensor 300 , a first optical path control member 400 , a first driving member 500 , and a second driving member. It may include a 520 and a sensing unit 700 .
- the first optical path control member 400 may be disposed on a movement path of light reflected by the subject, and the lens unit 100 includes the first optical path control member 400 and the image sensor 300 . can be placed between them.
- the optical axis of the lens unit 100 may be perpendicular to the upper surface of the image sensor 300 . That is, the light reflected by the subject may sequentially pass through the first optical path control member 400 and the lens unit 100 to be provided to the image sensor 300 .
- the first driving member 500 may be connected to the first optical path control member 400 .
- the first driving member 500 may include at least one actuator.
- the first driving member 500 may move the first optical path control member 400 by using the driving force of the actuator.
- the first driving member 500 may tilt the first optical path control member 400 along a first axis or a second axis.
- the first driving member 500 may tilt the first optical path control member 400 in a second direction (x-axis direction) as a rotation axis.
- the first driving member 500 may tilt the first optical path control member 400 in a third direction (y-axis direction) as a rotation axis. Accordingly, the camera module 1000 may correct the shake.
- the second driving member 520 may be connected to the image sensor 300 .
- the second driving member 520 may include at least one actuator.
- the second driving member 520 may include at least one of a voice coil motor (VCM), a piezo-electric device, a shape memory alloy, and a MEMS device as an actuator.
- the second driving member 520 may control the position of the image sensor 300 by using the driving force of the actuator.
- the second driving member 520 may move the image sensor 300 in at least one of a first direction (z-axis direction) and a third direction (y-axis direction).
- the image sensor 300 may correct a position change caused by the shaking of the camera module 1000 .
- the second driving member 520 may have a set height.
- the height of the second driving member 520 in the first direction may be smaller than the height of the first optical path control member 400 in the first direction. Accordingly, it is possible to prevent the first direction height of the camera module 1000 from increasing by the movement of the second driving member 520 and the image sensor 300 , and the camera module is slimmer and more compact. can be provided
- the detection unit 700 may detect the shaking of the camera module 1000 .
- the sensing unit 700 may include a first sensor 710 that detects a change in angular velocity and a second sensor 720 that detects a change in acceleration, and can detect rotation and position changes that occur when shaking. have.
- the camera module 1000 may include a controller 750 .
- the control unit 750 may control signals respectively applied to the first driving member 500 and the second driving member 520 based on the angular velocity and acceleration change information detected by the sensing unit 700 .
- the control unit 750 may include a first control unit (not shown) and a second control unit (not shown).
- the first control unit may control a tilt angle of the first optical path control member 400 by controlling a voltage, a current, etc. applied to the first driving member 500 .
- the second control unit 750 may control the position of the image sensor 300 by controlling voltage and current applied to the second driving member 520 .
- the sensing unit 700 may detect information about the shaking, and the controller 750 may correct the shaking.
- the first sensor 710 may detect a change in angular velocity and the second sensor 720 may detect a change in acceleration.
- the sensing unit 700 calculates the degree of shaking of the camera module 1000, for example, the degree of rotation, the degree of position change based on the change detected by the first sensor 710 and the second sensor 720, and can be corrected
- the control unit 750 may correct a feedback value for the signal detected by the sensing unit 700 .
- the feedback value correction may be a correction for controlling noise and the like in the angular velocity and acceleration change information sensed by the sensing unit 700 .
- the feedback value correction is performed on the basis of the acquired information by the first driving member 500 and the second driving member 520 for controlling the first light path control member 400 and the image sensor 500 .
- ) may mean correcting the signal to be applied to.
- the first control unit may correct the degree of rotation detected by the first sensor 710
- the second control unit may correct the degree of position change detected by the second sensor 720 . can proceed.
- the first and second controllers may provide the corrected signals to the first driving member 500 and the second driving member 520 , respectively.
- the first optical path control member 400 is tilted to the first axis or the second axis according to the signal applied from the first control unit, and may correct shake due to rotation.
- the first light path control member 400 may tilt the second direction (x-axis direction) and the third direction (y-axis direction) as a rotation axis, and The tilt angle may satisfy Equation 2 below.
- Equation 2 ⁇ x denotes an angle at which the first light path control member 400 tilts in the second direction as an axis, and ⁇ y denotes an angle at which the first optical path control member 400 tilts the third direction as an axis. means the tilt angle.
- ⁇ x means an angular change amount of the camera module 1000 with respect to the second direction obtained by the controller 750, and ⁇ y is the camera module with respect to the third direction obtained by the controller 750 (1000) means the amount of angular change.
- the image sensor 300 moves in at least one of a first direction (z-axis direction) and a third direction (y-axis direction) by a signal applied from the second control unit 750 and responds to a change in position. Shake can be corrected.
- the moving distance of the image sensor 300 may satisfy Equation 3 below.
- Equation 3 L denotes a distance to the subject, and FL denotes an overall focal length of the lens unit 100 .
- Tx is the amount of change in the position of the camera module 1000 in the second direction obtained by the controller 750
- Ty is the amount of change in the position of the camera module 1000 in the third direction obtained by the controller. it means.
- Sz denotes a distance at which the image sensor 300 moves in the first direction (z-axis direction)
- Sy denotes a distance at which the image sensor 300 moves in the third direction (y-axis direction).
- the camera module 1000 includes a tilt angle of the first optical path control member 400 and a tilt angle of the image sensor 300 based on the angular velocity and the amount of acceleration detected by the sensing unit 700 .
- the control unit 750 may set the tilt angle of the first light path control member 400 through rotation by shaking, and set the moving distance of the image sensor 300 through position change due to shaking. can Accordingly, by using the camera module 1000 according to the embodiment, it is possible to effectively compensate for shaking due to rotation and position change when photographing a subject located at infinity or near.
- FIG. 6 is another view showing the arrangement of the components of the camera module according to the embodiment.
- descriptions of the same and similar components as those of the camera module described above are omitted, and the same reference numerals are assigned to the same and similar components.
- the camera module 1000 includes a lens unit 100 , an image sensor 300 , a first optical path control member 400 , a second optical path control member 420 , and a first It may include a driving member 500 , a second driving member 520 , and a sensing unit 700 .
- the first optical path control member 400 may be disposed on a movement path of light reflected by the subject, and the lens unit 100 includes the first optical path control member 400 and the image sensor 300 . can be placed between them.
- the first optical path control member 400 reflects the light incident in the first direction (z-axis direction) to the first optical path control member 400 to provide a path of the light to the plurality of lenses of the lens unit 100 .
- the second optical path control member 420 may be disposed between the lens unit 100 and the image sensor 300 .
- the second optical path control member 420 may change the path of the light passing through the lens unit 100 .
- the second light path control member 420 may include a reflector and a prism.
- the second optical path control member 420 may include a right-angled prism.
- the second optical path control member 420 may reflect the path of the light passing through the lens unit 100 at an angle of 90 degrees.
- the second optical path control member 420 reflects the light passing through the lens unit 100 in the second direction (x-axis direction) to determine the path of the light in the first direction (x) in which the image sensor 300 is disposed. axial) can be changed again.
- An optical axis of the lens unit 100 may be parallel to an upper surface of the image sensor 300 . That is, the light reflected by the subject sequentially passes through the first optical path control member 400 , the lens unit 100 , and the second optical path control member 420 to be provided to the image sensor 300 .
- the second light path control member 420 may have a set height.
- the height of the second light path control member 420 in the first direction may be smaller than the height of the first light path control member 400 in the first direction.
- the height of the second light path control member 420 in the second direction may be smaller than the height of the second light path control member 420 in the first direction. Accordingly, it is possible to prevent the height in the first direction of the camera module 1000 from increasing by the second light path control member 420 and the image sensor 300 , and the camera module 1000 is more It can be provided in a slim and compact form.
- the camera module 1000 may apply the image sensor 300 having a larger size. Accordingly, the camera module 1000 may provide a high-pixel result.
- the first driving member 500 may be connected to the first optical path control member 400 .
- the first driving member 500 may include at least one actuator.
- the first driving member 500 may move the first optical path control member 400 by using the driving force of the actuator.
- the first driving member 500 tilts the first optical path control member 400 in at least one of a second direction (x-axis direction) and a third direction (y-axis direction) as a rotation axis. can be controlled Accordingly, the camera module 1000 may correct shake due to rotation.
- the second driving member 520 may be connected to the image sensor 300 .
- the second driving member 520 may include at least one actuator.
- the second driving member 520 may control the position of the image sensor 300 by using the driving force of the actuator.
- the second driving member 520 may move the image sensor 300 in at least one of a second direction (x-axis direction) and a third direction (y-axis direction).
- the image sensor 300 may correct a position change caused by the shaking of the camera module 1000 .
- the detection unit 700 may detect the shaking of the camera module 1000 .
- the sensing unit 700 may include a first sensor 710 that detects a change in angular velocity and a second sensor 720 that detects a change in acceleration, and can detect rotation and position changes that occur when shaking. have.
- the camera module 1000 may include a controller 750 .
- the control unit 750 may control signals respectively applied to the first driving member 500 and the second driving member 520 based on the angular velocity and acceleration change information detected by the sensing unit 700 .
- the first control unit of the control unit 750 may control the tilt angle of the first light path control member 400 by controlling the voltage, current, etc. applied to the first driving member 500 .
- the second control unit 750 of the control unit 750 may control the position of the image sensor 300 by controlling voltage and current applied to the second driving member 520 .
- the sensing unit 700 may detect information about the shaking, and the controller 750 may correct the shaking.
- the first sensor 710 may detect a change in angular velocity and the second sensor 720 may detect a change in acceleration.
- the sensing unit 700 calculates the degree of shaking of the camera module 1000, for example, the degree of rotation, the degree of position change based on the change detected by the first sensor 710 and the second sensor 720, and can be corrected
- the control unit 750 may correct a feedback value for the signal detected by the sensing unit 700 .
- the feedback value correction may be a correction for controlling noise and the like in the angular velocity and acceleration change information sensed by the sensing unit 700 .
- the feedback value correction is performed on the basis of the acquired information by the first driving member 500 and the second driving member 520 for controlling the first light path control member 400 and the image sensor 500 .
- ) may mean correcting the signal to be applied to.
- the first control unit may correct the degree of rotation detected by the first sensor 710
- the second control unit may correct the degree of position change detected by the second sensor 720 . can proceed. Thereafter, the first and second controllers may provide the corrected signals to the first driving member 500 and the second driving member 520 , respectively.
- the first optical path control member 400 is tilted to the first axis or the second axis according to the signal applied from the first control unit, and may correct shake due to rotation.
- the first light path control member 400 may tilt the second direction (x-axis direction) and the third direction (y-axis direction) as a rotation axis, and The tilt angle may satisfy Equation 4 below.
- Equation 4 ⁇ x denotes an angle at which the first light path control member 400 tilts in the second direction as an axis, and ⁇ y denotes an angle at which the first optical path control member 400 tilts the third direction as an axis. means the tilt angle.
- ⁇ x means an angular change amount of the camera module 1000 with respect to the second direction obtained by the controller 750, and ⁇ y is the camera module with respect to the third direction obtained by the controller 750 (1000) means the amount of angular change.
- the image sensor 300 moves in at least one of a second direction (x-axis direction) and a third direction (y-axis direction) by a signal applied from the second control unit 750 and responds to a change in position. Shake can be corrected.
- the moving distance of the image sensor 300 may satisfy Equation 5 below.
- Equation 5 L denotes a distance to the subject, and FL denotes an overall focal length of the lens unit 100 .
- Tx means the amount of change in the position of the camera module 1000 in the second direction obtained by the controller 750
- Ty is the camera module 1000 in the third direction calculated by the controller 750.
- Sx denotes a distance at which the image sensor 300 moves in the second direction (x-axis direction)
- Sy denotes a distance at which the image sensor 300 moves in the third direction (y-axis direction).
- the camera module 1000 determines the tilt angle of the first optical path control member 400 and the position of the image sensor 300 based on the amount of change in angular velocity and acceleration sensed by the sensing unit 700 . can be set.
- the control unit 750 may set the tilt angle of the first light path control member 400 through rotation by shaking, and set the moving distance of the image sensor 300 through position change due to shaking. can Accordingly, by using the camera module 1000 according to the embodiment, it is possible to effectively compensate for shaking due to rotation and position change when photographing a subject located at infinity or near.
- FIG. 7 is a diagram illustrating that the camera module according to the embodiment is applied to a mobile terminal.
- the mobile terminal 1 may include a camera module 10 provided on the rear side.
- the camera module 10 may include an image capturing function.
- the camera module 10 may include at least one of an auto focus function, a zoom function, and an OIS function.
- the camera module 10 may process a still image image or an image frame of a moving image obtained by the image sensor 300 in a shooting mode or a video call mode.
- the processed image frame may be displayed on a display unit (not shown) of the mobile terminal 1 and may be stored in a memory (not shown).
- the camera module may be further disposed on the front of the mobile terminal 1 .
- the camera module 10 may include a first camera module 10A and a second camera module 10B.
- the camera module 10 may provide an anti-shake (OIS) function for a subject located at infinity or near.
- OIS anti-shake
- the camera module 10 may provide a shake prevention function based on the angular velocity and acceleration that change when shake occurs in the camera module 10 . Accordingly, the camera module 10 can effectively prevent shaking when photographing a subject located at various distances.
- the camera module 10 may have a slimmer structure, so that the mobile terminal 1 may also be provided in a slim form.
- the mobile terminal 1 may further include an autofocus device 31 .
- the auto focus device 31 may include an auto focus function using a laser.
- the auto focus device 31 may be mainly used in a condition in which the auto focus function using the image of the camera module 10 is deteriorated, for example, in proximity of 10 m or less or in a dark environment.
- the autofocus device 31 may include a light emitting unit including a vertical cavity surface emitting laser (VCSEL) semiconductor device and a light receiving unit that converts light energy such as a photodiode into electrical energy.
- the mobile terminal 1 may further include a flash module 33 .
- the flash module 33 may include a light emitting device emitting light therein. The flash module 33 may be operated by a camera operation of a mobile terminal or a user's control.
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Abstract
Description
| 피사체와의 거리 | 흔들림 | 픽셀의 이동(pixel) | |
| Pitch, Yaw | 무한대(Infinity) | 1 도(deg) | 432 |
| 25 mm | 1 도(deg) | 432 | |
| X-Y 위치변화 | 무한대(Infinity) | 0.5 mm | 0 |
| 700 mm | 0.5 mm | 17 | |
| 100 mm | 0.5 mm | 124 | |
| 25 mm | 0.5 mm | 354 |
Claims (15)
- 피사체에 반사된 광의 이동 경로에 배치되며, 제1 방향으로 입사된 광을 상기 제1 방향과 수직인 제2 방향으로 반사하는 제1 광경로 제어부재;상기 제1 광경로 제어부재와 연결되며 상기 제1 광경로 제어부재의 움직임을 제어하는 제1 구동부재;상기 광의 이동 경로 상에 배치되며 적어도 하나의 렌즈를 포함하는 렌즈부;상기 렌즈부를 통과한 광을 감지하는 이미지 센서;흔들림에 의해 변화하는 각속도 및 가속도를 감지하는 감지부; 및상기 흔들림에 의해 변화하는 각속도 및 가속도를 바탕으로 상기 제1 광경로 제어부재를 제1 축 또는 제2 축으로 틸트 제어하는 제어부를 포함하는 카메라 모듈.
- 제1 항에 있어서, 상기 제1 및 제2 방향과 수직인 제3 방향을 포함하고,상기 제1 광경로 제어부재는 상기 제2 및 제3 방향 각각을 회전축으로 틸트 가능하게 제공되는 카메라 모듈.
- 제2 항에 있어서, 상기 제1 광경로 제어부재의 틸트 각도는 하기 수학식 1을 만족하는 카메라 모듈.[수학식 1](수학식 1에서 L은 상기 피사체와의 거리를 의미하고, θx는 상기 제1 광경로 제어부재가 상기 제2 방향을 축으로 틸트하는 각도를 의미하고, θy는 상기 제1 광경로 제어부재가 상기 제3 방향을 축으로 틸트하는 각도를 의미한다. 또한, Φx는 상기 제어부가 구한 상기 제2 방향에 대한 상기 카메라 모듈의 각도 변화량을 의미하고, Φy는 상기 제어부가 구한 상기 제3 방향에 대한 상기 카메라 모듈의 각도 변화량을 의미한다. 또한, Tx는 상기 제어부가 구한 상기 제2 방향에 대한 상기 카메라 모듈의 위치 변화량을 의미하고, Ty는 상기 제어부가 구한 상기 제3 방향에 대한 상기 카메라 모듈의 위치 변화량을 의미한다.)
- 제3 항에 있어서, 상기 렌즈부의 광축은 상기 이미지 센서의 상면과 수직인 카메라 모듈.
- 제1 항에 있어서, 상기 감지부는 상기 카메라 모듈의 각속도 변화를 감지하는 제1 센서; 및 상기 카메라 모듈의 가속도 변화를 감지하는 제2 센서를 포함하는 카메라 모듈.
- 피사체에 반사된 광의 이동 경로에 배치되며, 제1 방향으로 입사된 광을 상기 제1 방향과 수직인 제2 방향으로 반사하는 제1 광경로 제어부재;상기 제1 광경로 제어부재와 연결되며 상기 제1 광경로 제어부재의 움직임을 제어하는 제1 구동부재;상기 광의 이동 경로 상에 배치되며 적어도 하나의 렌즈를 포함하는 렌즈부;상기 렌즈부를 통과한 광을 감지하는 이미지 센서;흔들림에 의해 변화하는 각속도 및 가속도를 감지하는 감지부;상기 이미지 센서와 연결되며 상기 이미지 센서의 위치를 제어하는 제2 구동부재; 및상기 흔들림에 의해 변화하는 각속도 및 가속도를 바탕으로 상기 제1 광경로 제어부재의 틸트 각도 및 상기 이미지 센서의 위치를 제어하는 제어부를 포함하는 카메라 모듈.
- 제6 항에 있어서, 상기 제1 및 제2 방향과 수직인 제3 방향을 포함하고,상기 제1 광경로 제어부재는 상기 제2 및 제3 방향 각각을 회전축으로 틸트 가능하게 제공되는 카메라 모듈.
- 제8 항에 있어서, 상기 이미지 센서의 이동 거리는 하기 수학식 3을 만족하는 카메라 모듈.[수학식 3](수학식 3에서 L은 상기 피사체와의 거리를 의미하고, FL은 상기 렌즈부의 전체 초점 거리(focal length)를 의미한다. 또한, Tx는 상기 제어부가 구한 상기 제2 방향에 대한 상기 카메라 모듈의 위치 변화량을 의미하고, Ty는 상기 제어부가 구한 상기 제3 방향에 대한 상기 카메라 모듈의 위치 변화량을 의미한다. 또한, Sz는 상기 이미지 센서가 상기 제1 방향으로 이동하는 거리를 의미하고, Sy는 상기 이미지 센서가 상기 제3 방향으로 이동하는 거리를 의미한다.)
- 제9 항에 있어서, 상기 제2 구동부재의 상기 제1 방향 높이는 상기 제1 광경로 제어부재의 상기 제1 방향 높이보다 낮은 카메라 모듈.
- 제9 항에 있어서, 상기 렌즈부의 광축은 상기 이미지 센서의 상면과 수직인 카메라 모듈.
- 제8 항에 있어서, 상기 렌즈부 및 상기 이미지 센서 사이에 배치되는 제2 광경로 제어부재를 더 포함하고,상기 제2 광경로 제어부재는, 상기 제2 방향으로 입사된 광을 상기 제1 방향으로 반사하는 카메라 모듈.
- 제12 항에 있어서, 상기 이미지 센서의 이동 거리는 하기 수학식 4를 만족하는 카메라 모듈.[수학식 4](수학식 4에서 L은 상기 피사체와의 거리를 의미하고, FL은 상기 렌즈부의 전체 초점 거리(focal length)를 의미한다. Tx는 상기 제어부가 구한 상기 제2 방향에 대한 상기 카메라 모듈의 위치 변화량을 의미하고, Ty는 상기 제어부가 구한 상기 제3 방향에 대한 상기 카메라 모듈의 위치 변화량을 의미한다. 또한, Sx는 상기 이미지 센서가 상기 제2 방향으로 이동하는 거리를 의미하고, Sy는 상기 이미지 센서가 상기 제3 방향으로 이동하는 거리를 의미한다.)
- 제13 항에 있어서, 상기 제2 광경로 제어부재의 상기 제1 방향 높이는 상기 제1 광경로 제어부재의 상기 제1 방향 높이보다 낮은 카메라 모듈.
- 제13 항에 있어서, 상기 렌즈부의 광축은 상기 이미지 센서의 상면과 평행한 카메라 모듈.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18/259,652 US12613450B2 (en) | 2020-12-29 | 2021-12-28 | Camera module |
| CN202180088596.3A CN116671120A (zh) | 2020-12-29 | 2021-12-28 | 相机模块 |
| EP21915790.6A EP4274218A4 (en) | 2020-12-29 | 2021-12-28 | Camera module |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020200186360A KR20220094781A (ko) | 2020-12-29 | 2020-12-29 | 카메라 모듈 |
| KR10-2020-0186360 | 2020-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022145992A1 true WO2022145992A1 (ko) | 2022-07-07 |
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| PCT/KR2021/020083 Ceased WO2022145992A1 (ko) | 2020-12-29 | 2021-12-28 | 카메라 모듈 |
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| US (1) | US12613450B2 (ko) |
| EP (1) | EP4274218A4 (ko) |
| KR (1) | KR20220094781A (ko) |
| CN (1) | CN116671120A (ko) |
| WO (1) | WO2022145992A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4546809A4 (en) * | 2022-09-26 | 2025-10-01 | Huawei Tech Co Ltd | PERISCOPIC CAMERA MODULE, OPTICAL IMAGE STABILIZATION METHOD, AND RELATED DEVICE |
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2020
- 2020-12-29 KR KR1020200186360A patent/KR20220094781A/ko active Pending
-
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- 2021-12-28 EP EP21915790.6A patent/EP4274218A4/en active Pending
- 2021-12-28 US US18/259,652 patent/US12613450B2/en active Active
- 2021-12-28 WO PCT/KR2021/020083 patent/WO2022145992A1/ko not_active Ceased
- 2021-12-28 CN CN202180088596.3A patent/CN116671120A/zh active Pending
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| JP2007228006A (ja) * | 2006-02-21 | 2007-09-06 | Casio Comput Co Ltd | デジタルカメラ |
| KR20080050880A (ko) * | 2006-12-04 | 2008-06-10 | 삼성전자주식회사 | 이미지 촬상 장치의 손떨림 보상을 위한 장치 및 방법 |
| KR20190072690A (ko) * | 2015-09-06 | 2019-06-25 | 코어포토닉스 리미티드 | 소형의 접이식 카메라의 롤 보정에 의한 자동 초점 및 광학식 손떨림 방지 |
| KR20190004121A (ko) * | 2017-07-03 | 2019-01-11 | 삼성전기주식회사 | 카메라 모듈 |
| KR20190137036A (ko) * | 2019-11-27 | 2019-12-10 | 엘지이노텍 주식회사 | 카메라 모듈 |
Non-Patent Citations (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4546809A4 (en) * | 2022-09-26 | 2025-10-01 | Huawei Tech Co Ltd | PERISCOPIC CAMERA MODULE, OPTICAL IMAGE STABILIZATION METHOD, AND RELATED DEVICE |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4274218A4 (en) | 2024-06-19 |
| KR20220094781A (ko) | 2022-07-06 |
| US20240069409A1 (en) | 2024-02-29 |
| EP4274218A1 (en) | 2023-11-08 |
| US12613450B2 (en) | 2026-04-28 |
| CN116671120A (zh) | 2023-08-29 |
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