WO2020189992A1 - 카메라 모듈 - Google Patents

카메라 모듈 Download PDF

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Publication number
WO2020189992A1
WO2020189992A1 PCT/KR2020/003580 KR2020003580W WO2020189992A1 WO 2020189992 A1 WO2020189992 A1 WO 2020189992A1 KR 2020003580 W KR2020003580 W KR 2020003580W WO 2020189992 A1 WO2020189992 A1 WO 2020189992A1
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WO
WIPO (PCT)
Prior art keywords
disposed
area
terminal
gyro
lens
Prior art date
Application number
PCT/KR2020/003580
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English (en)
French (fr)
Korean (ko)
Inventor
박정배
김창욱
박용성
Original Assignee
엘지이노텍(주)
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Application filed by 엘지이노텍(주) filed Critical 엘지이노텍(주)
Publication of WO2020189992A1 publication Critical patent/WO2020189992A1/ko

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    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • 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
    • 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

Definitions

  • the embodiment relates to a camera module.
  • various shooting functions include at least one of an optical zoom function (zoom-in/zoom-out), an auto-focusing (AF) function, or an image stabilization or image stabilization (OIS) function.
  • an optical zoom function zoom-in/zoom-out
  • AF auto-focusing
  • OIS image stabilization or image stabilization
  • the autofocus and image stabilization functions are performed by moving or tilting several lenses fixed to the lens holder and aligned with the optical axis, in the vertical direction of the optical axis or the optical axis.
  • a lens assembly composed of a plurality of lenses is provided.
  • a separate lens driving device to drive is required.
  • the lens driving device consumes high power, and in order to protect it, a cover glass must be added separately from the camera module, thereby increasing the overall size of the existing camera module.
  • research on a liquid lens unit that performs autofocus and camera shake correction functions by electrically controlling the curvature of the interface between two liquids has been conducted.
  • a conventional camera module uses a gyro sensor, and the gyro sensor is sensitive to noise.
  • An embodiment is to provide a camera module in which noise of a gyro sensor is reduced.
  • the camera module includes: a lens unit including a liquid lens including a conductive liquid and a non-conductive liquid; A printed circuit board on which an image sensor aligned with an optical axis of the lens unit is disposed; A driving circuit disposed on the printed circuit board and controlling an interface formed by the conductive liquid and the non-conductive liquid of the liquid lens; A gyro sensor disposed on the printed circuit board and detecting movement of the camera module; And a driving signal conductive line disposed on the printed circuit board and output from the driving circuit to transmit a signal for controlling the interface of the liquid lens, wherein the driving signal conductive line is parallel to the gyro sensor and the optical axis. It can be arranged so as not to overlap in one vertical direction.
  • the camera module may include a connection part electrically connecting the liquid lens and the driving signal conductive line.
  • a driving circuit area in which the driving circuit is disposed on the printed circuit board may be disposed between an image area in which the image sensor is disposed and a gyro area in which the gyro sensor is disposed.
  • a gyro area in which the gyro sensor is disposed on the printed circuit board may be disposed between a driving circuit area in which the driving circuit is disposed and an image area in which the image sensor is disposed.
  • the liquid lens may include a common electrode electrically connected to the conductive liquid; And a plurality of individual electrodes electrically spaced apart from the common electrode, and the liquid lens may be driven by a difference between a common voltage applied to the common electrode and an individual voltage applied to the plurality of individual electrodes.
  • the image area may include a central area in which the image sensor is disposed; A first terminal region positioned on one side of the center region and in which a first terminal connected to some of the plurality of individual electrodes is disposed; And a second terminal region located on the other side of the center region and in which a second terminal connected to the other part of the plurality of individual electrodes is disposed. And a third terminal region in which a third terminal connected to the common electrode is disposed.
  • the driving circuit region is disposed between the image region and the gyro region in a horizontal direction crossing the vertical direction, and the driving circuit region is
  • the gyro region may have a flat pattern disposed between the image region and the driving circuit region in a horizontal direction crossing the vertical direction, and the driving signal conductive line bypassing the gyro region. have.
  • the gyro area may include a first side facing the image area; A second side facing the driving circuit region and opposite to the first side; A third side between the first side and the second side; And a fourth side opposite to the third side, wherein the driving circuit region faces the second side of the gyro region and includes a first side portion on which fourth to sixth terminals are disposed, and conducts the driving signal.
  • the line includes: a first connection wire electrically connecting a portion of the plurality of individual voltages provided from the fourth terminal to the first terminal; A second connection wire electrically connecting the other portion of the plurality of individual voltages provided from the fifth terminal to the second terminal; And a third connection wire electrically connecting the common voltage provided from the sixth terminal to the third terminal.
  • the first connection wire may have a planar pattern spaced apart from the third side of the gyro area
  • the second connection wire may have a planar pattern spaced apart from the fourth side of the gyro area.
  • the third connection wiring may have a flat pattern disposed adjacent to the first or second connection wiring.
  • the OIS function can be excellently performed.
  • FIG. 1 is a schematic cross-sectional view of a camera module according to an embodiment.
  • FIG. 2 is a cross-sectional view of a liquid lens unit according to an exemplary embodiment.
  • FIG. 3 is a schematic block diagram of a camera module.
  • FIG. 4 is a plan view of a camera module according to an embodiment.
  • FIG. 5 is a plan view of a camera module according to another embodiment.
  • 6A and 6B are waveform diagrams of signals output from a gyro sensor in a camera module according to a comparative example and an embodiment.
  • first, second, A, B, (a), and (b) may be used in describing the constituent elements of the embodiment of the present invention. These terms are only for distinguishing the component from other components, and are not limited to the nature, order, or order of the component by the term.
  • a component is described as being'connected','coupled' or'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also the component and The case of being'connected','coupled', or'connected' due to another element between the other elements may also be included.
  • top (top) or bottom (bottom) when it is described as being formed or disposed on the “top (top) or bottom (bottom)” of each component, the top (top) or bottom (bottom) is one as well as when the two components are in direct contact with each other It also includes a case in which the above other component is formed or disposed between the two components.
  • upper (upper) or lower (lower) when expressed as "upper (upper) or lower (lower)", the meaning of not only an upward direction but also a downward direction based on one component may be included.
  • the variable lens may be a variable focus lens. Also, the variable lens may be a lens whose focus is adjusted.
  • the variable lens may be at least one of a liquid lens, a polymer lens, a liquid crystal lens, a VCM type, and an SMA type.
  • the liquid lens may include a liquid lens including one liquid and a liquid lens including two liquids.
  • a liquid lens containing one liquid may change the focus by adjusting a membrane disposed at a position corresponding to the liquid, and for example, the focus may be changed by pressing the membrane by electromagnetic force of a magnet and a coil.
  • a liquid lens including two liquids may control an interface formed between the conductive liquid and the non-conductive liquid by using a voltage applied to the liquid lens including the conductive liquid and the non-conductive liquid.
  • the polymer lens can change the focus of the polymer material through a driving unit such as piezo.
  • the liquid crystal lens can change the focus by controlling the liquid crystal by electromagnetic force.
  • the VCM type can change the focus by adjusting the solid lens or the lens assembly including the solid lens through the electromagnetic force between the magnet and the coil.
  • the SMA type can change focus by controlling a solid lens or a lens assembly including a solid lens using a shape memory alloy.
  • the camera module according to the embodiment will be described as including a liquid lens as a variable lens, but is not limited thereto. That is, the following description of the camera module according to the embodiment may be applied to a camera module including a variable lens other than a liquid lens.
  • the camera modules 100, 200, 200A, and 200B according to the embodiment will be described using a Cartesian coordinate system, but the embodiment is not limited thereto. That is, according to the Cartesian coordinate system, the x-axis, y-axis, and z-axis are orthogonal to each other, but embodiments are not limited thereto. That is, the x-axis, y-axis, and z-axis may cross each other instead of orthogonal.
  • FIG. 1 is a schematic cross-sectional view of a camera module 100 according to an embodiment.
  • the camera module 100 may include a lens assembly 22, a control circuit 24, and an image sensor 26.
  • the lens assembly 22 may include at least one lens unit.
  • At least one lens unit may include first and second lenses and a liquid lens unit (or a liquid lens module).
  • the control circuit 24 controls a lens unit, for example, a liquid lens unit, and serves to supply a driving voltage (or an operating voltage) for driving the liquid lens unit.
  • the control circuit 24 may have the form of an integrated circuit (IC).
  • the image sensor 26 may perform a function of converting light that has passed through at least one lens unit, for example, a first lens, a liquid lens unit, and a second lens into image data. More specifically, the image sensor 26 may convert light into an analog signal through a pixel array including a plurality of pixels, and generate image data by synthesizing a digital signal corresponding to the analog signal.
  • a lens unit for example, a first lens, a liquid lens unit, and a second lens into image data. More specifically, the image sensor 26 may convert light into an analog signal through a pixel array including a plurality of pixels, and generate image data by synthesizing a digital signal corresponding to the analog signal.
  • control circuit 24 and the image sensor 26 may be disposed on a single printed circuit board (PCB), but this is only an example, and embodiments are not limited thereto.
  • PCB printed circuit board
  • control circuit 24 When the camera module 100 according to the embodiment is applied to an optical device (Optical Instrument), the configuration of the control circuit 24 may be designed differently according to specifications required by the optical device.
  • the control circuit 24 may be implemented in the form of an integrated circuit (IC) as a single chip.
  • the first lens is disposed above the lens assembly 22 and may be a region in which light is incident from the outside of the lens assembly 22.
  • the first lens may be implemented as a single lens, or may be implemented as a plurality of lenses that are aligned with respect to a central axis to form an optical system.
  • the central axis may mean an optical axis (LX) of the optical system formed by the first lens, the liquid lens unit, and the second lens included in the camera module 100, and parallel to the optical axis (LX). It can also mean an axis.
  • the optical axis LX may correspond to the optical axis of the image sensor 26.
  • the first lens, the liquid lens unit, the second lens, and the image sensor 26 may be arranged and aligned along the optical axis LX through an active alignment (AA).
  • the active alignment may mean an operation of matching the optical axes of each of the first lens, the second lens, and the liquid lens unit with the optical axis of the image sensor 26.
  • the second lens may be disposed under the liquid lens part.
  • the second lens may be disposed to be spaced apart from the first lens in the optical axis direction (eg, z-axis direction).
  • the second lens may be implemented as a single lens, or may be implemented as a plurality of lenses that are aligned with respect to a central axis to form an optical system.
  • each of the first lens and the second lens is a solid lens, and may be implemented with plastic, but the embodiment is not limited to a specific material of each of the first lens and the second lens.
  • FIG. 2 is a cross-sectional view of a liquid lens unit according to an exemplary embodiment.
  • the liquid lens unit shown in FIG. 2 includes a first connection substrate (or an individual electrode connection substrate) 144, a liquid lens (or a liquid lens body), and a second connection substrate (or a common electrode connection substrate) 146.
  • the connection part of the liquid lens part serves to electrically connect the printed circuit board and the liquid lens, and may include first and second connection boards 144 and 146.
  • the liquid lens includes a plurality of different types of liquids (LQ1, LQ2), first to third plates (P, P2, P3), first and second electrodes (E1, E2), and an insulating layer 148.
  • LQ1, LQ2 liquids
  • P, P2, P3 first to third plates
  • E1, E2 first and second electrodes
  • a plurality of liquids are accommodated in a cavity (CA), and a first liquid having conductivity (or referred to as a'conductive liquid') (LQ1) and a second liquid having non-conductive properties (or insulation Liquid or referred to as'non-conductive liquid') (LQ2) may be included.
  • the first liquid LQ1 and the second liquid LQ2 are not mixed with each other, and an interface BO may be formed in a contact portion between the first and second liquids LQ1 and LQ2.
  • the first liquid LQ1 may be disposed on the second liquid LQ2, but the embodiment is not limited thereto.
  • the inner surface of the first plate P1 may form a sidewall i of the cavity CA.
  • the first plate P1 may include upper and lower openings having a predetermined inclined surface. That is, the cavity CA is defined as an area surrounded by the inclined surface i of the first plate P1, the first opening in contact with the second plate P2, and the second opening in contact with the third plate P3. Can be.
  • the diameter of the wider opening may vary depending on an angle of view (FOV) required by the liquid lens or the role that the liquid lens plays in the camera module 100.
  • the size (or area, or width) O1 of the first opening may be larger than the size (or area, or width) O2 of the second opening.
  • the size of each of the first and second openings may be a cross-sectional area in a horizontal direction (eg, in the x-axis and y-axis directions).
  • the size of each of the first and second openings may mean a radius when the cross section of the opening is circular, and may mean a diagonal length when the cross section of the opening is square.
  • Each of the first and second openings may have a shape of a hole having a circular cross section.
  • the interface BO formed by the two liquids may move along the inclined surface i of the cavity CA by the driving voltage applied to the liquid lens.
  • the first liquid LQ1 and the second liquid LQ2 are filled, accommodated, or disposed in the cavity CA of the first plate P1.
  • the cavity CA is a portion through which the light passing through the first lens passes. Therefore, the first plate P1 may be made of a transparent material, or may contain impurities so that light transmission is not easy.
  • Electrodes may be disposed on one surface and the other surface of the first plate P1, respectively.
  • the plurality of first electrodes E1 may be disposed to be spaced apart from the second electrode E2, and may be disposed on one surface (eg, a lower surface, a side surface, and an upper surface) of the first plate P1.
  • the second electrode E2 is disposed on at least a partial area of the other surface (eg, the upper surface) of the first plate P1 and may directly contact the first liquid LQ1.
  • first electrode E1 may be a plurality of electrodes (hereinafter, referred to as “individual electrode”), and the second electrode E2 may be one electrode (hereinafter referred to as “common electrode”).
  • a portion of the second electrode E2 disposed on the other surface of the first plate P1 may be exposed to the first liquid LQ1 having conductivity.
  • Each of the first and second electrodes E1 and E2 may be made of a conductive material.
  • the second plate P2 may be disposed on one surface of the second electrode E2. That is, the second plate P2 may be disposed on the first plate P1. Specifically, the second plate P2 may be disposed on the upper surface of the second electrode E2 and the cavity CA.
  • the liquid lens unit shown in FIG. 2 may further include a bonding member 150.
  • the bonding member (or adhesive) 150 is disposed between the first plate P1 and the second plate P2 and serves to couple the first plate P1 and the second plate P2 to each other.
  • the liquid lens unit shown in FIG. 2 may further include a plate leg (LEG) 150 instead of including the bonding member 150.
  • the plate leg 150 is disposed between the first plate P1 and the second plate P2 and serves to support the second plate P2.
  • the plate leg 150 may be integrally implemented with the same material as the second plate P2.
  • the third plate P3 may be disposed on one surface of the first electrode E1. That is, the third plate P3 may be disposed under the first plate P1. Specifically, the third plate P3 may be disposed under the lower surface of the first electrode E1 and the cavity CA.
  • the second plate P2 and the third plate P3 may be disposed to face each other with the first plate P1 interposed therebetween. Also, at least one of the second plate P2 and the third plate P3 may be omitted.
  • At least one of the second or third plates P2 and P3 may have a rectangular planar shape.
  • Each of the second and third plates P2 and P3 is a region through which light passes, and may be made of a light-transmitting material.
  • each of the second and third plates P2 and P3 may be made of glass, and may be made of the same material for convenience of the process.
  • light may be incident from the first lens to the second plate P2. That is, the area of the first opening in the direction in which light is incident from the cavity CA may be larger than the area of the second opening in the opposite direction.
  • the second plate P2 may have a configuration that allows light to travel into the cavity CA.
  • the third plate P3 may have a configuration that allows light that has passed through the cavity CA of the first plate P1 to proceed to the second lens.
  • light may be incident from the first lens to the third plate P3. That is, the area of the second opening in the direction in which light is incident from the cavity CA may be smaller than the area of the first opening in the opposite direction.
  • the third plate P3 may have a configuration that allows light to travel into the cavity CA.
  • the second plate P2 may have a configuration that allows the light passing through the cavity CA of the first plate P1 to proceed to the second lens.
  • the second plate P2 may directly contact the first liquid LQ1.
  • the insulating layer 148 may be disposed in the lower region of the cavity CA while covering a part of the upper surface of the third plate P3. That is, the insulating layer 148 may be disposed between the second liquid LQ2 and the third plate P3.
  • the insulating layer 148 may be disposed while covering a part of the first electrode E1 forming a sidewall of the cavity CA.
  • the insulating layer 148 may be disposed on the upper surface of the first plate P1 to cover a part of the second electrode E2 and the first plate P1 and the first electrode E1. Accordingly, contact between the first electrode E1 and the first liquid LQ1 and contact between the first electrode E1 and the second liquid LQ2 may be blocked by the insulating layer 148.
  • the insulating layer 148 covers one of the first and second electrodes E1 and E2 (for example, the first electrode E1) and the other electrode (for example, the second electrode E2). )) may be exposed to apply electric energy to the conductive first liquid LQ1.
  • the first connection substrate 144 may electrically connect a plurality of first electrodes E1 included in the liquid lens to a main substrate (not shown).
  • the second connection substrate 146 may electrically connect the second electrode E2 of the liquid lens to the main substrate.
  • the first connection substrate 144 may be implemented as a flexible printed circuit board (FPCB), and the second connection substrate 146 may be implemented as an FPCB or a single metal substrate (conductive metal plate). have.
  • the first connection substrate 144 may be electrically connected to an electrode pad formed on the main substrate through connection pads electrically connected to each of the plurality of first electrodes E1.
  • the second connection substrate 146 may be electrically connected to an electrode pad formed on the main substrate through a connection pad electrically connected to the second electrode E2.
  • the main substrate may include grooves, circuit elements (not shown), etc. in which the image sensor 26 is mounted, seated, contacted, fixed, temporarily fixed, supported, coupled, or accommodated.
  • the circuit element of the main board may constitute a control module that controls the liquid lens unit and the image sensor 26.
  • the control module will be described later with reference to FIG. 3.
  • the circuit element may include at least one of a passive element and an active element, and may have various widths and heights.
  • the main substrate may be implemented as a Rigid Flexible Printed Circuit Board (RFPCB) including an FPCB.
  • the FPCB may be bent as required by the space in which the camera module 100 is mounted.
  • the first connection substrate 144 and the second connection substrate 146 serve to supply driving voltages for driving the liquid lens to the first and second electrodes E1 and E2, respectively.
  • the driving voltage is applied to the first and second electrodes E1 and E2 through the first connection substrate 144 and the second connection substrate 146, between the first liquid LQ1 and the second liquid LQ2
  • the interface BO of is deformed so that at least one of a shape such as a curvature of the liquid lens or a focal length or a tilting angle may be changed (or adjusted).
  • the focal length of the liquid lens may be adjusted while at least one of the curvature or inclination of the interface BO formed in the liquid lens is changed in response to the driving voltage.
  • the camera module 100 including the liquid lens has an auto-focusing (AF) function, camera shake correction, or image shake prevention (OIS: Optical Image). Stabilizer) function, etc. can be performed.
  • AF auto-focusing
  • OIS Optical Image
  • Stabilizer Optical Image
  • the first connection substrate 144 may transmit four different first to fourth individual voltages to the liquid lens, and the second connection substrate 146 may transmit one common voltage to the liquid lens.
  • the common voltage may include a DC voltage or an AC voltage.
  • the width or duty cycle of the pulse may be constant.
  • the liquid lens may be driven by a difference between a common voltage applied to a common electrode and an individual voltage applied to a plurality of individual electrodes.
  • Individual voltages supplied through the first connection substrate 144 may be applied to the plurality of first electrodes E1 exposed to each corner of the liquid lens.
  • a conductive epoxy is disposed between the first connection substrate 144 and the plurality of first electrodes E1, so that the first connection substrate 144 and the plurality of first electrodes E1 contact and bond. And can be energized.
  • a conductive epoxy is disposed between the second connection substrate 146 and the second electrode E2
  • the second connection substrate 146 and the second electrode E2 may contact, couple, and conduct electricity.
  • the camera module 200 according to the embodiment will be described as follows from a control point of view.
  • FIG. 3 is a schematic block diagram of a camera module 200 according to an embodiment.
  • the camera module 200 may include a control circuit 210 and a lens assembly 250.
  • the control circuit 210 may correspond to the control circuit 24 of FIG. 1, and the lens assembly 250 may correspond to the lens assembly 22 of FIG. 1.
  • the control circuit 210 may correspond to the above-described control module.
  • the control circuit 210 may control an operation of a liquid lens unit including the liquid lens 280.
  • the control circuit 210 may include a gyro sensor 220 and a driving circuit 230.
  • the control circuit 210 has a configuration for performing an AF function and an OIS function, and liquid contained in the lens assembly 250 using a user's request or detection result (eg, a motion signal of the gyro sensor 220).
  • the lens 280 can be controlled.
  • the liquid lens 280 may correspond to the liquid lens shown in FIG. 2.
  • the gyro sensor 220 may be an independent configuration not included in the control circuit 210 or may be included in the control circuit 210.
  • the gyro sensor 220 has a yaw axis and a yaw axis in order to compensate for vertical and horizontal movements (ie, shake or hand shake) of an optical device including the camera module 100, 200 or the camera module 100, 200. It is possible to detect the angular velocity of movement in two directions of the pitch axis.
  • the gyro sensor 220 may generate a motion signal corresponding to the sensed angular velocity and provide it to the driving circuit 230.
  • the driving circuit 230 serves to control the interface BO formed by the two liquids LQ1 and LQ2, and may include a controller 232 and a voltage driving circuit 234.
  • the controller 232 removes high frequency noise components from the motion signal using a low pass filter (LPF) to extract only the desired band, and shakes the hand using the motion signal from which noise is removed.
  • LPF low pass filter
  • a driving voltage corresponding to a shape that the liquid lens 280 of the liquid lens module 260 should have may be calculated.
  • the controller 232 includes information for the AF function (that is, the distance to the object) from the inside (eg, image sensor 26) or outside (eg, distance sensor or application processor) of the optical device or camera module 100, 200 Information), and a driving voltage corresponding to a shape that the liquid lens 280 should have may be calculated according to a focal length for focusing on an object through the distance information.
  • information for the AF function that is, the distance to the object
  • a driving voltage corresponding to a shape that the liquid lens 280 should have may be calculated according to a focal length for focusing on an object through the distance information.
  • the controller 232 may store a driving voltage table in which a driving voltage and a driving voltage code for causing the voltage driving circuit 234 to generate the driving voltage, and a driving voltage code corresponding to the calculated driving voltage are stored in the driving voltage table. It is obtained with reference to and the obtained driving voltage code may be output to the voltage driving circuit 234.
  • the voltage driving circuit 234 may generate an analog driving voltage corresponding to the driving voltage code based on the digital driving voltage code provided from the controller 232 and provide it to the lens assembly 250.
  • the voltage driving circuit 234 receives a supply voltage (eg, a voltage supplied from a separate power circuit) and increases the voltage level, a voltage stabilizer for stabilizing the output of the voltage booster, and each of the liquid lens 280. It may include a switching unit for selectively supplying the output of the voltage booster to the terminal.
  • a supply voltage eg, a voltage supplied from a separate power circuit
  • a voltage stabilizer for stabilizing the output of the voltage booster
  • each of the liquid lens 280 may include a switching unit for selectively supplying the output of the voltage booster to the terminal.
  • the switching unit may include a configuration of a circuit called H Bridge.
  • the high voltage output from the voltage booster is applied as the power supply voltage of the switching unit.
  • the switching unit may selectively supply an applied power voltage and a ground voltage to both ends of the liquid lens 280.
  • the liquid lens 280 includes four first electrodes E1, a first connection substrate 144, one second electrode E2, and a second connection substrate 146 for driving. As shown. Both ends of the liquid lens 280 may mean any one of the plurality of first electrodes E1 and the second electrode E2. In addition, both ends of the liquid lens 280 may mean any one of the four first electrodes E1 and the second electrode E2.
  • a voltage in the form of a pulse having a preset width may be applied to each electrode of the liquid lens 280, and the driving voltage applied to the liquid lens 280 is applied to each of the first electrode E1 and the second electrode E2. It is the difference between the applied voltage.
  • the voltage booster controls the increased voltage level, and the switching The part controls the phase of the pulse voltage applied to the common electrode and the individual electrodes to generate an analog type driving voltage corresponding to the driving voltage code.
  • control circuit 210 may control a voltage applied to each of the first electrode E1 and the second electrode E2.
  • control circuit 210 may further include a connector (not shown) that performs a communication or interface function of the control circuit 210.
  • the connector performs communication protocol conversion. can do.
  • the lens assembly 250 may include a liquid lens unit 260, and the liquid lens unit 260 may include a driving voltage providing unit 270 and a liquid lens 280.
  • the liquid lens unit may correspond to the liquid lens unit shown in FIG. 2 described above.
  • the driving voltage providing unit 270 may receive a driving voltage from the voltage driving circuit 234 and provide a driving voltage to the liquid lens 280.
  • the driving voltage may be an analog voltage applied between any one of the plurality of individual electrodes and one common electrode.
  • the driving voltage providing unit 270 may include a voltage adjusting circuit (not shown) or a noise removing circuit (not shown) for compensating for a loss due to terminal connection between the control circuit 210 and the lens assembly 250, Alternatively, the voltage provided from the voltage driving circuit 234 may be bypassed to the liquid lens 280.
  • the liquid lens 280 may perform at least one of an AF function or an OIS function by deforming an interface BO between the first liquid LQ1 and the second liquid LQ2 according to the driving voltage.
  • the gyro sensor 220 illustrated in FIG. 3 may be sensitive to noise.
  • FIG. 4 is a plan view of the camera module 200A according to an embodiment
  • FIG. 5 is a plan view of the camera module 200B according to another embodiment.
  • the camera modules 200A and 200B illustrated in FIGS. 4 and 5 are described as corresponding to the embodiments of the camera modules 100 and 200 illustrated in FIGS. 1 and 3, but the embodiment is not limited thereto. That is, according to another embodiment, the camera modules 200A and 200B shown in FIGS. 4 and 5 may be applied to a camera module having a configuration different from that of the camera modules 100 and 200 shown in FIGS. 1 and 3. .
  • the camera modules 200A and 200B shown in FIGS. 4 and 5 include a printed circuit board 20, a lens unit including a liquid lens 280, a driving circuit, a gyro sensor GS, and a driving signal conductive line. I can.
  • the printed circuit board 20, the liquid lens 280, the gyro sensor GS, and the image sensor 26 are shown to have a rectangular planar shape, but embodiments are not limited thereto. . That is, the printed circuit board 20, the liquid lens 280, the gyro sensor GS, and the image sensor 26 may have various planar shapes.
  • planar area of the image sensor 26 is larger than that of the liquid lens 280, but the embodiment is not limited thereto. That is, according to another embodiment, the planar area of the image sensor 26 may be less than or equal to that of the liquid lens 280.
  • liquid lens 280 is not disposed on the printed circuit board 20, but is illustrated with a dotted line to aid understanding.
  • the printed circuit board 20 shown in FIGS. 4 and 5 may correspond to the above-described main board, and the image sensor 26, the driving circuit, the gyro sensor GS, and the driving signal conductive line are the printed circuit board 20 ) Can be placed.
  • the printed circuit board 20 may include an image area IA, a gyro area GA, and a driver area DA.
  • the image area IA may be defined as an area in which the lens units arranged along the optical axis LX and the image sensor 26 are disposed.
  • the lens unit may include the liquid lens unit (eg, 260) described above in FIGS. 2 and 3, and may further include first and second lenses.
  • the liquid lens 280 may correspond to the liquid lens illustrated in FIGS. 2 and 3, but embodiments are not limited thereto.
  • the image sensor 26 may be aligned with the optical axis LX of the lens unit including the liquid lens 280, and may mean the image sensor 26 shown in FIG. 1.
  • the image area IA may include a central area CEA and first and second terminal areas T1 and T2.
  • the central area CEA may be defined as an area in which the image sensor 26 is disposed.
  • the first terminal area T1 is located at one side of the center area CEA (eg, above the center area CEA), and is connected to some of the plurality of individual electrodes (eg, 302, 304) may be defined as an arrangement area.
  • the second terminal area T2 is located on the other side of the center area CEA (for example, under the center area CEA), and is connected to the other part of the plurality of individual electrodes (for example, For example, it may be defined as an area where 306 and 308 are disposed.
  • the first terminal of the first terminal region T1 is connected to the third and fourth individual electrodes, and the second terminal region T2 The second terminal of) may be connected to the first and second individual electrodes.
  • the image area IA may further include a third terminal area in which the third terminal is disposed.
  • the third terminal may be connected to the common electrode. 4 and 5, it is illustrated that the third terminal region is included in the second terminal region T2, but the embodiment is not limited thereto. That is, the third terminal region may be included in the first terminal region T1 or may be provided separately from the first and second terminal regions T1 and T2.
  • the gyro area GA may be defined as an area in which a gyro sensor GS for sensing movement (shake or shake) of an optical device including the camera modules 200A and 200B or the camera modules 200A and 200B is disposed.
  • the gyro sensor GS may correspond to the gyro sensor 220 illustrated in FIG. 3.
  • the gyro area GA, the image area IA, and the driving circuit area DA may be spaced apart from each other and disposed on the printed circuit board 20.
  • a driving circuit (not shown) for controlling and driving a lens unit (eg, a liquid lens unit) may be disposed in the driving circuit area DA.
  • the driving circuit may correspond to the driving circuit 230 shown in FIG. 3.
  • the driving signal conductive lines (for example, CL11 to CL3) are disposed on the printed circuit board 20 and are output from the driving circuit disposed in the driving circuit area DA to the interface BO of the liquid lens 280 It serves to transmit a signal to control.
  • the driving signal conductive lines (eg, CL11 to CL3) may electrically connect the driving circuit and the lens unit, that is, the liquid lens 280. That is, the connection part (for example, the connection substrates 144 and 146 shown in FIG. 2) may electrically connect the liquid lens 280 and the driving signal conductive lines (for example, CL11 to CL3).
  • the driving signal conductive lines (eg, CL11 to CL3) are in a vertical direction parallel to the gyro sensor GS (or gyro area GA) and the optical axis LX (eg, z-axis direction). It can be arranged so as not to overlap.
  • a camera module 200A according to an embodiment will be described with reference to FIG. 4 as follows.
  • the driving circuit area DA in a horizontal direction (eg, x-axis and y-axis direction) intersecting with a vertical direction (eg, z-axis direction), the driving circuit area DA May be disposed between the image area IA and the gyro area GA.
  • the driving circuit area DA may include first and second side portions S1 and S2.
  • the first side S1 faces the image area IA, and fourth to sixth terminals T4 and T6 may be disposed.
  • the second side portion S2 faces the gyro area GA and is located on the opposite side of the first side portion S2.
  • the driving signal conductive line may include first to third connection wires.
  • the first connection wire serves to electrically connect some of the plurality of individual voltages provided from the fourth terminal T4 to the first terminal of the first terminal region T1.
  • the first connection wire may include the 1-1 and 1-2 connection wires CL11 and CL12.
  • the 1-1 connection wiring CL11 includes a plurality of individual voltages, for example, a fourth individual voltage provided from the 4-1 terminal T41 among the first to fourth individual voltages and the first terminal region T1.
  • One of the first terminals 302 may be electrically connected.
  • the 1-2 connection wiring CL12 includes a plurality of individual voltages, for example, a third individual voltage provided from the 4-2 terminal T42 among the first to fourth individual voltages and the first terminal region T1.
  • the other one of the first terminals 304 may be electrically connected.
  • the second connection wire serves to electrically connect the other portion of the plurality of individual voltages provided from the fifth terminal T5 to the second terminal of the second terminal area T2.
  • the second connection wiring may include the 2-1 and 2-2 connection wirings CL21 and CL22.
  • the 2-1 connection wiring CL21 includes a plurality of individual voltages, for example, of the second individual voltage provided from the 5-1 terminal T51 and the second terminal region T2 among the first to fourth individual voltages.
  • One of the second terminals 306 may be electrically connected.
  • the 2-2 connection wiring CL22 includes a plurality of individual voltages, for example, of the first individual voltage provided from the 5-2 terminal T52 and the second terminal region T2 among the first to fourth individual voltages.
  • the other one 308 of the second terminals may be electrically connected.
  • the third connection wiring CL3 may electrically connect the common voltage provided from the sixth terminal T6 to the third terminal.
  • the third connection wire CL3 since the third terminal region is included in the second terminal region T2, the third connection wire CL3 may be electrically connected to the third terminal 310 of the second terminal region T2.
  • a camera module 200B according to another embodiment will be described with reference to FIG. 5 as follows.
  • the gyro area GA may be disposed between the image area IA and the driving circuit area DA.
  • the camera module 200B shown in FIG. 5 is the camera module 200A shown in FIG. 4 except that the plane shape in which the gyro area GA and the driving circuit area DA are arranged is different from that of FIG. 4. Is the same as
  • the gyro area GA may include first to fourth sides SS1 to SS4.
  • the first side SS1 may be defined as a side facing the image area IA
  • the second side SS2 may be defined as a side opposite to the first side SS1 and facing the driving circuit area DA.
  • the third side SS3 may be defined as a side between the first side SS1 and the second side SS2
  • the fourth side SS4 may be defined as a side opposite to the third side SS3.
  • the driving circuit area DA may include a first side portion S1.
  • the first side S1 may face the second side SS2 of the gyro area GA, and the fourth to sixth terminals T4 to T6 may be disposed on the first side S1.
  • the driving signal conductive lines CL11 to CL3 illustrated in FIG. 5 may include first to third connection wirings CL11 to CL3, similar to the driving signal conductive lines CL11 to CL3 illustrated in FIG. 4,
  • the first to third connection wirings CL11 to CL3 are electrically connected to the first to third terminals of the image area IA as described above with reference to FIG. 4.
  • the first connection wires CL11 and CL12 electrically connect some of the plurality of individual voltages provided from the fourth terminals T4: T41 and T42 and the first terminals 302 and 304 of the first terminal area T1.
  • the second connection wires CL21 and CL22 electrically connect the other part of the plurality of individual voltages provided from the fifth terminals T5: T51 and T52 to the second terminals 306 and 308 of the second terminal area T2.
  • the third connection wire CL3 electrically connects the common voltage provided from the sixth terminal T6 to the third terminal 310 in the third terminal area.
  • the driving signal conductive lines CL11 to CL22 illustrated in FIG. 5 have a planar pattern disposed bypassing the gyro area GA. This is because, unlike FIG. 4, in the case of the camera module 200B illustrated in FIG. 5, the gyro area GA is located between the driving circuit area DA and the image area IA.
  • the first connection wires CL11 and CL12 have a flat pattern spaced apart from the third side SS3 of the gyro area GA
  • the second connection wires CL21 and CL22 are the gyro area GA.
  • the third connection wire CL3 may have a flat pattern disposed adjacent to the first connection wires CL11 and CL12 or the second connection wires CL21 and CL22.
  • the third connection wiring CL3 may have a planar pattern disposed adjacent to the second connection wirings CL21 and CL22.
  • FIGS. 6A and 6B are waveform diagrams of signals output from the gyro sensors 220 and GS in the camera module according to the comparative example and the embodiment.
  • the horizontal axis represents time and the vertical axis represents level.
  • the gyro sensor 220 (GS) is very sensitive to electrical and mechanical noise around itself. Therefore, according to the form of arranging the gyro sensor 220, GS, the image sensor 26, and the driving circuit on the printed circuit board 20, ambient noise is applied to the gyro sensor 220, GS, and the gyro sensor
  • the signal itself detected at (220, GS) may be shaken and the OIS performance of the camera module may be degraded.
  • a high voltage (for example, 70 volts) is applied to the liquid lens through a driving signal conductive line connecting the driving circuit and the liquid lens, and a signal having a high frequency component is transmitted to the liquid lens through the driving signal conductive line. I can.
  • the driving signal conductive line overlaps the gyro area GA (or the gyro sensor) in a vertical direction (eg, z-axis direction) parallel to the optical axis LX. Accordingly, as shown in FIG. 6A, the liquid lens is boosted on (410) compared to the stopped state 420 in which the liquid lens is not driven in the camera module, that is, a driving voltage is applied to the liquid lens. It can be seen that the swing width of the signal output from the gyro sensor GS increases by about 2 times due to noise.
  • the driving signal conductive lines (for example, CL11 to CL3) are aligned with the optical axis LX in a vertical direction (for example, in the z-axis direction) in the gyro area GA (or gyro It is disposed so as not to overlap with the sensor GS). That is, as shown in FIG. 4, since the image area IA and the driving circuit area DA are arranged to face each other, the driving signal conductive lines (eg, CL11 to CL3) are vertically parallel to the optical axis LX. It does not overlap with the gyro area GA (or the gyro sensor GS) in the direction (eg, the z-axis direction). Alternatively, as shown in FIG.
  • the driving signal conductive lines CL11 to CL22 cover the gyro area GA. Since it has a planar pattern arranged to be bypassed, the driving signal conductive lines (for example, CL11 to CL3) are aligned with the optical axis LX in a vertical direction (for example, in the z-axis direction) in the gyro area GA (or gyro). Sensor (GS)) and does not overlap. Accordingly, as shown in FIG. 6B, it can be seen that the swing width of the boost-on state 510 is similar to that of the stopped state 520 without any change.
  • an optical device may be implemented by using the camera modules 100, 200, 200A, and 200B according to the above-described embodiment.
  • the optical device may include a device capable of processing or analyzing an optical signal.
  • Examples of optical devices may include a camera/video device, a telescope device, a microscope device, an interferometer device, a photometer device, a polarimeter device, a spectrometer device, a reflectometer device, an autocollimator device, a lens meter device, and the like, including a lens assembly. This embodiment can be applied to an optical device capable of.
  • the optical device may be implemented as a portable device such as a smart phone, a notebook computer, or a tablet computer.
  • These optical devices include a camera module (100, 200, 200A, 200B), a display unit (not shown) that outputs an image, a battery (not shown) that supplies power to the camera module (100, 200, 200A, 200B), and a camera.
  • It may include a main body housing for mounting the modules 100, 200, 200A, and 200B, a display unit, and a battery.
  • the optical device may further include a communication module capable of communicating with other devices and a memory unit capable of storing data. The communication module and the memory unit may also be mounted on the main body housing.
  • the camera module according to the embodiment is an optical device such as a camera/video device, a telescope device, a microscope device, an interferometer device, a photometer device, a polarimeter device, a spectrometer device, a reflectometer device, an autocollimator device, a lens meter device, etc. It can be used in portable devices such as computers and tablet computers.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Studio Devices (AREA)
  • Adjustment Of Camera Lenses (AREA)
PCT/KR2020/003580 2019-03-19 2020-03-16 카메라 모듈 WO2020189992A1 (ko)

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WO2022080650A1 (ko) * 2020-10-14 2022-04-21 엘지이노텍 주식회사 카메라 장치
CN112927628B (zh) * 2021-01-28 2023-10-27 京东方科技集团股份有限公司 一种显示面板及显示装置
CN114466126B (zh) * 2022-02-25 2023-09-26 维沃移动通信有限公司 摄像组件、摄像组件的制备方法和电子设备

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KR20130043427A (ko) * 2011-10-20 2013-04-30 주식회사 동운아나텍 카메라의 손떨림 보정 장치
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