Camera module

Abstract

A camera module according to an embodiment includes: a position sensor portion including a first sensor unit and a second sensor unit; and a control section connected to the first sensor unit and the second sensor unit, and obtaining position information based on output signals from the first sensor unit and the second sensor unit, in which the first sensor unit includes a plurality of first input terminals and a plurality of first output terminals, and the second sensor unit includes a plurality of second input terminals and a plurality of second output terminals. The second sensor unit includes a plurality of second input terminals and a plurality of second output terminals, and the control portion is individually connected to the plurality of first output terminals and the plurality of second output terminals, and obtains position information by means of selective combination of output signals from the first sensor unit and the second sensor unit.

Description

Technical Field

[0001] Embodiments relate to a camera module. Background Art

[0002] The camera module performs a function of capturing a subject and saving it as an image or video, and is installed in a mobile terminal such as a mobile phone, a laptop computer, a drone, a vehicle, and the like.

[0003] Meanwhile, ultra-small camera modules are built in portable devices such as smart phones, tablet PCs, and laptop computers, and these camera modules are able to perform an auto focus (AF) function of automatically adjusting a distance between an image sensor and a lens to align the focus of the lens.

[0004] The auto focus function is a necessary function for clearly capturing still images or videos within a camera module. The auto focus function is provided by detecting the position of a lens barrel equipped with a coil using a position sensor, and providing a driving signal to a driving unit according to the detected position of the lens barrel and an input target position. Thus, a driving force is generated between the magnet of the driving unit and the coil mounted on the lens barrel, and the auto focus function is performed when the position of the lens barrel moves to a focus position.

[0005] However, the conventional camera module uses a position sensor to detect the position of the lens barrel. At this time, the detection signal output from the position sensor includes environmental noise. Therefore, it is difficult for the conventional camera module to detect the precise position of the lens barrel, and thus has limitations in moving the lens barrel to a precise position.

[0006] In addition, with the recent technological development of camera modules, the stroke is also increasing. Therefore, there is a problem in that it is impossible to detect the precise position of the entire stroke range of a camera module having a long stroke with only one position sensor.

[0007] (Patent Document 1) KR 10-1664886B Summary of the invention Technical issues

[0008] The embodiment provides a camera module capable of increasing a position detection range and an operating method thereof.

[0009] In addition, the embodiment provides a camera module capable of improving position accuracy and an operating method thereof.

[0010] In addition, the embodiment provides a camera module including a position detection circuit applicable to various camera usage environments and an operating method thereof.

[0011] In addition, the embodiment provides a camera module capable of using a plurality of detection signals output from a plurality of position sensors individually and in combination, and an operating method thereof.

[0012] The technical problems to be solved by the proposed embodiments are not limited to the above-mentioned technical problems, and those skilled in the art can clearly understand other unmentioned technical problems in the field to which the proposed embodiments belong from the following description. Technical Solution

[0013] According to an embodiment, a camera module includes: a position sensor unit, including a first sensor unit and a second sensor unit; and a control unit, connected to the first sensor unit and the second sensor unit, and configured to obtain position information based on multiple output signals of the first sensor unit and the second sensor unit, wherein the first sensor unit includes multiple first input terminals and multiple first output terminals, wherein the second sensor unit includes multiple second input terminals and multiple second output terminals, and wherein the control unit is connected to both the multiple first output terminals and the multiple second output terminals, and obtains the position information through selective operation based on the multiple output signals of the first sensor unit and the second sensor unit received through the multiple first output terminals and the multiple second output terminals.

[0014] In addition, the multiple first output terminals of the first sensor unit include: a first-first output terminal, which outputs a first-first output signal having a first polarity; and a first-second output terminal, which outputs a first-second output signal having a second polarity opposite to the first polarity, and the multiple second output terminals of the second sensor unit include: a second-first output terminal, which outputs a second-first output signal having a first polarity; and a second-second output terminal, which outputs a second-second output signal having a second polarity.

[0015] In addition, the control unit includes a port unit connected to a plurality of first output terminals and a plurality of second output terminals, and the port unit includes: a first port connected to the first-first output terminal and receiving a first-first output signal, a second port connected to the first-second output terminal and receiving the first-second output signal, a third port connected to the second-first output terminal and receiving the second-first output signal, and a fourth port connected to the second-second output terminal and receiving the second-second output signal.

[0016] In addition, the control unit includes: a multiplexer, which is connected to the port unit and switches multiple output signals received through the connected port; an amplifier, which receives multiple output signals of the first sensor unit and the second sensor unit through one of the port unit and the multiplexer, and differentially amplifies at least one of the received multiple output signals; and an analog-to-digital converter, which is connected to the amplifier and converts the output signal of the amplifier into a digital signal.

[0017] In addition, the amplifier includes an inverting terminal and a non-inverting terminal for receiving multiple output signals of the first sensor unit and the second sensor unit, the inverting terminal includes a first inverting terminal and a second inverting terminal, the non-inverting terminal includes a first non-inverting terminal and a second non-inverting terminal, and the amplifier differentially amplifies a first added value obtained by adding signals received through the first inverting terminal and the second inverting terminal and a second added value obtained by adding signals received through the first non-inverting terminal and the second non-inverting terminal.

[0018] In addition, the multiplexer includes: a first multiplexer connected to the first port and configured to switch a first-first output signal received through the first port to one of a first inverting terminal and a first non-inverting terminal of the amplifier; and a second multiplexer connected to the first port and configured to switch a second-second output signal received through a fourth port to either one of the first inverting terminal and the first non-inverting terminal of the amplifier.

[0019] In addition, the second inverting terminal of the amplifier is connected to the third port and receives the second-first output signal, and the second non-inverting terminal of the amplifier is connected to the second port and receives the first-second output signal.

[0020] In addition, the multiplexer includes: a third multiplexer connected to the third port and configured to switch the second-first output signal received through the third port to the second inverting terminal of the amplifier; and a fourth multiplexer connected to the second port and configured to switch the first-second output signal received through the second port to the second non-inverting terminal of the amplifier.

[0021] In addition, under a first condition, the first multiplexer outputs the first-first output signal to the first inverting terminal of the amplifier, and the second multiplexer outputs the second-second output signal to the first non-inverting terminal of the amplifier, and wherein, under a second condition different from the first condition, the first multiplexer outputs the first-first output signal to the first non-inverting terminal of the amplifier, and the second multiplexer outputs the second-second output signal to the first inverting terminal of the amplifier.

[0022] In addition, the amplifier amplifies the difference between the first added value and the second added value and outputs the difference, wherein, under the first condition, the first added value is the added value of the first-first output signal and the second-first output signal, and the second added value is the added value of the first-second output signal and the second-second output signal, and wherein, under the second condition, the first added value is the added value of the second-first output signal and the second-second output signal, and the second added value is the added value of the first-first output signal and the first-second output signal. Effects of the Invention

[0023] The embodiment includes a plurality of sensor units. The plurality of sensor units may be position detection sensors that detect the position of the lens module. The embodiment detects the position of the lens module using the plurality of sensor units. Thus, the embodiment can extend the detection range in response to the long stroke of the lens module. Thus, the embodiment can improve the position detection accuracy of the lens module. Thus, the embodiment can improve the control accuracy of the lens module. Therefore, the embodiment can improve the operational reliability of the camera module.

[0024] In addition, each of the plurality of sensor units includes a plurality of output terminals. In addition, the plurality of output terminals are not directly connected to each other. Specifically, the plurality of output terminals are individually connected to different ports of the control unit.

[0025] Therefore, the embodiment can apply the optimal position detection condition according to the use environment of the camera module.

[0026] Specifically, the embodiment can detect the position of the lens module using a first differential amplified signal, which differentially amplifies the subtraction value of the output signal of the first sensor unit and the output signal of the second sensor unit under a first condition. In addition, the embodiment can detect the position of the lens module using a second differential amplified signal, which differentially amplifies the addition value of the output signal of the first sensor unit and the output signal of the second sensor unit under a second condition. In addition, the embodiment can detect the position of the lens module using a third differential amplified signal, which differentially amplifies the subtraction value of the output signal of the first sensor unit under a third condition. In addition, the embodiment can detect the position of the lens module using a fourth differential amplified signal, which differentially amplifies the subtraction value of the output signal of the second sensor unit under a fourth condition.

[0027] At this time, the condition can be determined according to the use environment of the camera module. For example, the form of the noise (e.g., common mode noise) sent to the camera module can vary according to the use location or surrounding structure of the camera module. In addition, the embodiment can determine one of the first condition and the second condition based on the current use environment to provide a detection signal with strong noise resistance. Therefore, the embodiment can improve the position detection accuracy of the lens barrel.

[0028] In addition, the embodiment can simplify the process of manufacturing the camera module without forming connection lines for directly connecting a plurality of sensor units to each other on a circuit board. In addition, the embodiment can improve product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a perspective view of a camera module according to an embodiment.

[0030] Figure 2 is an exploded perspective view of a camera module according to an embodiment.

[0031] Figure 3 yes Figure 1 A cross-sectional view of the camera module along direction AA'.

[0032] Figure 4 is a block diagram showing a configuration of a camera module according to an embodiment.

[0033] Figure 5 2 is a view illustrating a connection relationship of a position sensor unit according to an embodiment.

[0034] Figure 6 1 is a view showing a connection relationship of a position sensor unit of a comparative example compared with the embodiment.

[0035] Figure 7 2 is a view illustrating a connection relationship between a position sensor unit and a control unit according to an embodiment.

[0036] Figure 8 is a block diagram showing a detailed configuration of a control unit of the first embodiment.

[0037] Fig. 9 Yes Description Figure 8 A view of the connection relationship between the multiplexer and the amplifier of a control unit.

[0038] Fig.10 is a view illustrating a switching state of a multiplexer and an input signal of an amplifier under a first condition.

[0039] Fig.11 Yes Description Fig.10 A view of the output signal of the amplifier.

[0040] Fig.12 is a view illustrating a switching state of the multiplexer and an input signal of the amplifier under a second condition.

[0041] Fig.13 Yes Description Fig.12 A view of the output signal of the amplifier.

[0042] Fig.14 is a block diagram showing a detailed configuration of a control unit of the second embodiment.

[0043] Fig.15 It is used to illustrate Fig.14 A view of the connection relationship between the multiplexer and the amplifier of a control unit.

[0044] Fig.16 is a perspective view of an optical device according to an embodiment.

[0045] Fig.17 yes Fig.16 A configuration diagram of the optical device shown in FIG. DETAILED DESCRIPTION

[0046] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0047] However, the spirit and scope of the present disclosure are not limited to a part of the described embodiments and may be implemented in various other forms, and one or more of the elements of the embodiments may be selectively combined and replaced within the spirit and scope of the present disclosure.

[0048] In addition, unless otherwise explicitly defined and described, the terms (including technical terms and scientific terms) used in the embodiments of the present disclosure may be interpreted as having the same meaning as that commonly understood by ordinary technicians in the field to which the present invention belongs, and those terms such as those defined in commonly used dictionaries may be interpreted as having a meaning consistent with their meaning in the context of the relevant field.

[0049] In addition, the terms used in the embodiments of the present disclosure are for describing the embodiments rather than for limiting the present disclosure. In this specification, unless otherwise specified in a phrase, a singular form may also include a plural form, and may include at least one of all combinations that can be combined with A, B, and C when described in "at least one (or more) of A (and), B, and C".

[0050] In addition, when describing the elements of the embodiments of the present disclosure, terms such as first, second, A, B, (a) and (b) may be used. These terms are only used to distinguish an element from other elements, and the terms are not limited to the essence, order or sequence of the elements. In addition, when an element is described as being "connected", "coupled" or "contacting" another element, it may include not only the situation that the element is directly "connected", "coupled" or "contacting" to other elements, but also the situation that the element is "connected", "coupled" or "contacting" with other elements by another element.

[0051] In addition, when described as being formed or disposed “on (above)” or “below (below)” of each element, “on (above)” or “below (below)” may include not only a case where two elements are directly connected to each other, but also a case where one or more other elements are formed or disposed between the two elements. In addition, when expressed as “on (above)” or “below (below)”, not only an upper direction based on one element but also a lower direction may be included.

[0053] Hereinafter, an optical axis direction used may be defined as an optical axis direction of a lens coupled to a camera actuator and a camera module, and a vertical direction may be defined as a direction perpendicular to the optical axis.

[0054] The auto focus function used below may be defined as a function of automatically focusing on a subject by moving the lens in the optical axis direction according to the distance of the subject so that a clear image of the subject can be obtained on the image sensor.

[0055] Meanwhile, the auto focus may correspond to AF. In addition, closed loop auto focus (CLAF) control may be defined as real-time feedback control of the position of the lens by sensing the distance between the image sensor and the lens to improve the accuracy of focus control.

[0057] Hereinafter, a camera module and an optical device including the same according to an embodiment will be described in detail. First, the overall structure of the camera module of the present invention will be described.

[0058] Figure 1 is a perspective view of a camera module according to an embodiment, Figure 2 is an exploded perspective view of a camera module according to an embodiment, and Figure 3 yes Figure 1 A cross-sectional view of the camera module along direction AA'.

[0059] refer to Figures 1 to 3, the camera module 100 according to the embodiment may include a lens 110 , a lens barrel 120 , a lens driving device 130 , a filter unit 140 , a base 150 , a circuit board 160 , a reinforcing plate 170 , a sensor 180 , and an adhesive member 190 .

[0060] Here, camera module 100 can be replaced by camera. In addition, base 150 can be replaced by holder, sensor base, inner base, filter mounting part or filter placement part. In addition, lens driving device 130 can be referred to as an actuator for driving lens 110 or lens barrel 120.

[0061] The lens 110 or the lens barrel 120 may be coupled to the lens driving device 130. For example, the lens 110 or the lens barrel 120 may be mounted on the lens driving device 130. For example, the lens 110 may be mounted in the lens barrel 120. The lens barrel 120 may be mounted on the lens driving device 130.

[0062] In this case, the lens driving device 130 includes a bobbin 132. Also, the lens barrel 120 may be coupled to the bobbin 132 of the lens driving device 130.

[0063] The adhesive member 190 may be disposed between the outer surface of the lens barrel 120 and the inner surface of the bobbin 132 of the lens driving device 130. In addition, the lens barrel 120 may be coupled to the bobbin 132 of the lens driving device 130 through the adhesive member 190. In this case, the lens barrel 120 may move together with the bobbin of the lens driving device 130.

[0064] For example, the lens drive device 130 includes a fixed portion having a fixed position and a moving portion that moves relative to the fixed portion. In addition, the bobbin 132 is included in the moving portion of the lens drive device 130. In this case, the lens barrel 120 is coupled to the bobbin 132 of the moving portion of the lens drive device 130. Therefore, when the moving portion of the lens drive device 130 moves, the lens barrel 120 can move together with the moving portion. Therefore, the lens barrel 120 and the lens 110 coupled to the lens barrel 120 can also be referred to as the moving portion of the camera module.

[0065] The lens 110 may be an optical system in which three or more lenses are stacked. The lens 110 may be an optical system in which five or more lenses are stacked. The lens 110 may be an optical system in which eight or more lenses are stacked. In this case, although the lens 110 is shown as including eight lenses in the drawings, the embodiment is not limited thereto. For example, the lens 110 may have a stacking structure of less than 8 pieces, or alternatively, may have a stacking structure of 9 or more pieces.

[0066] The lens 110 may include a lens made of a plastic material. The lens 110 according to an embodiment of the present invention may include a first lens unit made of a plastic material and a second lens unit made of a glass material. Also, the number of lenses in the first lens unit made of a plastic material may be greater than the number of lenses in the second lens unit made of a glass material. For example, the number of lenses in the first lens unit made of a plastic material may be two or more.

[0067] In one embodiment, the lens 110 may be stacked with a plastic lens and / or a glass lens. Here, the coefficient of thermal expansion (CTE) of the plastic material is five times or more higher than the coefficient of thermal expansion (CTE) of the glass material, and the change value of the refractive index (|dN / Dt|) as a function of temperature may be ten times or more higher than the change value of the refractive index of the plastic material. Here, dN is the change value of the refractive index of the lens, and dT is the change value of the temperature.

[0068] In addition, the camera module 100 may be any one of a camera module for auto focus (AF) and a camera module for optical image stabilizer (OIS). The camera module for AF refers to a camera module that can only perform an auto focus function. The camera module for OIS refers to a camera module that performs both an auto focus function and an OIS function.

[0069] For example, the lens driving device 130 may be a lens driving device for AF or a lens driving device for OIS. Here, the meanings of "for AF" and "for OIS" may be the same as those described in the camera module for AF and the camera module for OIS.

[0070] For example, the lens driving device 130 of the camera module 100 may be a lens driving device for OIS.

[0071] The lens driving device 130 may include a housing 131 and a bobbin 132 disposed in the housing 131 and coupled to the lens barrel 120 .

[0072] In this case, the bobbin 132 , the lens 110 , and the lens barrel 120 provided in the housing 131 may be referred to as a moving portion that moves during AF driving or OIS driving.

[0073] In addition, although not specifically shown in the drawings, the lens driving device 130 may include a first coil (not shown) coupled to the bobbin 132. In addition, the lens driving device 130 may include a magnet (not shown) coupled to the housing 131 and opposite to the first coil.

[0074] In addition, the lens driving device 130 may include at least one upper elastic member (not shown) coupled to the upper portion of the housing 131 and the upper portion of the bobbin 132. In addition, the lens driving device 130 may include at least one lower elastic member (not shown) coupled to the lower portion of the housing 131 and the lower portion of the bobbin 132.

[0075] In addition, the lens driving device 130 may include a cover member 133 providing a space for accommodating components of the camera module.

[0076] The lens driving device 130 according to the embodiment can move the bobbin 132 and the lens barrel 120 to be coupled to the bobbin 132 in the optical axis direction by electromagnetic force through the interaction between the first coil and the magnet. In addition, the positions of the lens barrel 120 and the lens 110 coupled to the lens barrel 120 in the optical axis direction can be controlled by electromagnetic force. Therefore, AF driving can be achieved.

[0077] In addition, the lens driving device 130 may further include a second coil (not shown). In addition, the lens driving device 130 may move the housing 131 in a direction perpendicular to the optical axis direction by an electromagnetic force generated by the interaction between the second coil and the magnet. Therefore, OIS driving may be achieved.

[0078] In addition, the lens driving device 130 of the camera module 100 may include a position sensor unit (not shown) for AF feedback driving. The position sensor unit may include a sensing magnet (not shown) disposed in the bobbin 132 and an AF position sensor (e.g., a Hall sensor (described later)) disposed in the housing 131.

[0079] In addition, the lens driving device 130 may further include a sensor substrate (not shown) disposed in the housing 131 and the AF position sensor disposed or mounted on the sensor substrate. In another embodiment, the AF position sensor may be disposed in the bobbin 132 and the sensing magnet may be disposed in the housing 131.

[0080] The AF position sensor detects the magnetic field strength of the sensing magnet according to the movement of the winding drum 132. In addition, the AF position sensor can generate an output signal according to the detection result. The AF position sensor can be electrically connected to the drive substrate through the upper elastic member (or the lower elastic member). The drive substrate can provide a drive signal to the AF position sensor. In addition, the drive substrate can receive the output signal of the AF position sensor.

[0081] Briefly explaining its operation, a driving signal (eg, driving current) may be provided to the first coil. In addition, the bobbin 132 may move in the optical axis direction by an electromagnetic force due to the interaction between the first coil and the magnet based on the provided driving signal.

[0082] At this time, due to the technological development of the camera module, the stroke of the lens barrel increases. The stroke represents the moving range of the lens barrel in the direction of the optical axis. Therefore, it may be difficult to accurately detect the position of the lens barrel in the entire stroke with only one AF position sensor. Therefore, the embodiment uses two AF position sensors to accurately detect the position of the lens barrel. The structure and operation thereof of detecting the position of the lens barrel using two AF position sensors will be described in detail below.

[0083] The base 150 may be placed under the lens driving device 130. The filter unit 140 may be mounted on the base 150.

[0084] That is, the base 150 may have a mounting portion on which the filter unit 140 is mounted. The base 150 may include a window having an opening, in which the filter unit 140 is mounted. An adhesive material (not shown) may be applied between the base 150 and the filter unit 140. For example, an adhesive member may be provided between a mounting portion (described later) of the base 150 and the filter unit 140. The adhesive member may be an epoxy resin, a thermosetting adhesive, an ultraviolet curing adhesive, etc.

[0085] Meanwhile, the base 150 may be manufactured by any one of a metal pressing method, a die casting method, and a MIM (Metal Insert Mold) method. Specifically, the base 150 may also be referred to as a metal frame including a metal material.

[0086] At this time, the base 150 includes a metal material, and thus, rigidity can be improved. In addition, in the embodiment, flatness of the filter unit 140 mounted on the base 150 can be improved.

[0087] That is, as the technology of the camera module develops, the size of the image sensor increases. Therefore, the size and weight of the filter unit 140 increase. Therefore, the base 150 of the embodiment is formed of a metal material, thereby being able to stably fix the filter unit 140.

[0088] In addition, the base 150 has a certain degree of thickness for stably fixing the filter unit 140. At this time, the embodiment can reduce the thickness of the base 150 compared with the comparative example.

[0089] For example, the base of the comparative example is an injection molded product made of an insulating material. Therefore, the base of the comparative example has a thickness of 180 μm or more. In contrast, the base 150 of the embodiment can have a thickness of less than 180 μm by being formed of a metal material. Therefore, the embodiment can reduce FBL (Flange Back Length) by reducing the thickness of the base 150.

[0090] The filter unit 140 can be disposed on the base 150. The filter unit 140 can block light of a specific frequency band among the light passing through the lens 110 accommodated in the lens barrel 120. For example, the filter unit 140 can block light of a specific frequency band from being incident on the image sensor 180. For example, the filter unit 140 can be an infrared filter, but is not limited thereto. The filter unit 140 can be arranged parallel to a direction perpendicular to the optical axis OA.

[0091] The circuit board 160 may be disposed below the base 150 . That is, the base 150 may be attached or coupled to the circuit board 160 .

[0092] The camera module 100 of the embodiment includes a sensor 180. The sensor 180 may also be referred to as an image sensor.

[0093] The sensor 180 is disposed on the circuit board 160. At this time, the circuit board 160 includes a cavity (not shown), and the sensor 180 may be disposed in the cavity. For example, the sensor 180 may overlap with the cavity of the circuit board 160 in the optical axis direction.

[0094] The camera module 100 according to the embodiment may include a reinforcement plate 170 .

[0095] The reinforcement plate 170 may be attached to a lower surface of the circuit board 160 .

[0096] The reinforcing plate 170 may include an overlapping region overlapping the cavity of the circuit board 160 on the optical axis.

[0097] In addition, the sensor 180 may be attached to the upper surface of the overlapped area of ​​the reinforcing plate 170. For example, the sensor 180 may be attached to the upper surface of the overlapped area of ​​the reinforcing plate 170 while being disposed in the cavity of the circuit board 160.

[0098] That is, in recent years, the resolution required for the camera module has increased. In addition, as the resolution increases, the size of the sensor 180 increases. In this case, when the sensor 180 is disposed on the circuit board 160, it may be difficult to maintain the flatness of the sensor 180 whose size is gradually increasing. In addition, when the sensor 180 is disposed on the circuit board 160, the heat dissipation characteristics of the sensor 180 may be deteriorated.

[0099] Therefore, in one embodiment, the reinforcing plate 170 is attached to the lower surface of the circuit board 160. In addition, in one embodiment, the sensor 180 may be attached to the reinforcing plate 170 instead of the circuit board 160.

[0100] For example, the sensor 180 of the embodiment may be directly attached to the reinforcing plate 170. Here, directly attached may mean that the sensor 180 is directly disposed on an adhesive member (not shown) disposed on the reinforcing plate 170.

[0101] Meanwhile, when the sensor 180 is disposed on the reinforcing plate 170, the sensor 180 may be exposed through the cavity of the circuit board 160. In addition, the terminal of the sensor 180 may be electrically connected to the pad 162 of the circuit board 160.

[0102] The reinforcing plate 170 may be a plate-like member having a thickness and hardness of a predetermined level or higher. Therefore, the reinforcing plate 170 may stably support the sensor 180. In addition, the reinforcing plate 170 may prevent the sensor 180 from being damaged by an external impact. For example, the reinforcing plate 170 may protect the sensor 180 from an external impact. In addition, the reinforcing plate 170 may dissipate the heat generated by the sensor 180. Therefore, the reinforcing plate 170 may perform a heat dissipation function of dissipating the heat generated by the sensor 180 to the outside while improving the flatness of the sensor 180.

[0103] To this end, the reinforcing plate 170 may include a metal material having high thermal conductivity. For example, the reinforcing plate 170 may be SUS. However, the embodiment is not limited thereto. The reinforcing plate 170 may be formed of aluminum having high thermal conductivity other than SUS. In addition, as another example, the reinforcing plate 170 may include glass, plastic, or synthetic resin.

[0104] The reinforcing plate 170 may be connected to a ground (not shown) of the circuit board 160. For example, the reinforcing plate 170 may be electrically connected to a ground pattern (not shown) of the circuit board 160. Therefore, the reinforcing plate 170 may function as a ground for protecting the camera module from electrostatic discharge (ESD).

[0105] In addition, the base 160 can be connected to a ground pattern of the circuit board. Therefore, the embodiment can further improve the heat dissipation characteristics of the camera module.

[0106] The light passing through the optical filter unit 140 may be incident on the sensor 180. The sensor 180 may be a portion in which an image included in the light incident through the optical filter unit 140 is formed.

[0107] The circuit board 160 may convert an image formed on the sensor 180 into an electrical signal and transmit the electrical signal to an external device. To this end, the circuit board 160 may include various circuit parts, element units, a control unit (e.g., a driver IC), etc. In addition, the circuit board 160 may include an element part or a pattern part electrically connected to the sensor 180.

[0108] Meanwhile, the sensor 180 may receive an image included in the incident light and convert the received image into an electrical signal. For example, the sensor 180 may be a charge coupled device (CCD), a complementary metal oxide semiconductor (CMOS), etc. However, the embodiment is not limited thereto, and the sensor 180 may be implemented by other devices that perform functions similar to those of the CCD or CMOS.

[0109] Meanwhile, a motion sensor (not shown) may be mounted or disposed on the circuit board 160. The motion sensor may be electrically connected to the control unit (driver IC) through a pattern portion disposed on the circuit board 160.

[0110] The motion sensor may obtain rotational angular velocity information according to the movement of the camera module 100. The motion sensor may be a two-axis or three-axis gyro sensor. The motion sensor may be an angular velocity sensor. The control device may be mounted or arranged on the circuit board 160.

[0111] The circuit board 160 may be electrically connected to the lens driving device 130. For example, the circuit board 160 may be electrically connected to a driving substrate of the lens driving device 130.

[0112] For example, the control unit of the circuit board 160 (to be described later) can supply a driving signal to the first coil and the second coil of the lens driving device 130. In addition, the control unit of the circuit board 160 can supply a driving signal to the AF position sensor (or the OIS position sensor). In addition, the control unit of the circuit board 160 can receive an output signal of the AF position sensor (or the OIS position sensor). The control unit can be referred to as a driver IC. For example, the control unit can be referred to as a driving element. For example, the control unit can be referred to as a driving unit. The AF position sensor can refer to the position sensor unit 250 described below.

[0113] The circuit board 160 and the control unit and the position sensor unit provided on the circuit board 160 can also be referred to as a “driving unit” that drives the moving part.

[0114] In addition, the "driving unit" can include a first coil and a magnet included in the lens driving device 130. In addition, the position sensor unit 250 of the driving unit can detect the position of the moving part. The control unit of the driving unit outputs a control signal based on the detected position to move the moving part to the target position. The control signal can indicate the intensity and direction of the current supplied to the first coil.

[0115] Meanwhile, the camera module 100 includes a connector 195 .

[0116] The connector 190 may be provided on the circuit board 160. For example, the connector 195 may be electrically connected to the circuit board 160. The connector 195 may include a port electrically connected to an external device.

[0118] Hereinafter, a lens driving device according to an embodiment will be described in detail.

[0119] Figure 4 is a block diagram showing a configuration of a camera module according to an embodiment.

[0120] Reference Figure 4 , the camera module according to the embodiment may include an image sensor 210 , an image signal processing unit 220 , a display unit 230 , a lens driving unit 240 , a position sensor unit 250 , a storage unit 260 , and a control unit 270 .

[0121] As described above, the image sensor 210 processes an optical image of a subject captured through a lens. To this end, the image sensor 210 may process image information acquired through the lens. In addition, the image sensor 210 may convert the processed image information into electrical data and output the electrical data.

[0122] The image sensor 210 is a form in which a plurality of light detectors are integrated into individual pixels, and the image sensor 210 converts the image information of the subject into electrical data and outputs the electrical data. The image sensor 210 accumulates the input light amount, and outputs the image captured by the lens according to the accumulated light amount according to the vertical synchronization signal. At this time, image acquisition is performed by the image sensor 210 that converts the light reflected from the subject into an electrical signal. Meanwhile, in order to obtain a color image using the image sensor 210, a color filter is required, and for example, a CFA (Color Filter Array) filter can be used. CFA allows only light representing one color to pass through each pixel, has a regularly arranged structure, and has various forms according to the arrangement structure.

[0123] The image signal processing unit 220 processes the image output by the image sensor 210 on a frame basis. In this case, the image signal processing unit 220 may also be referred to as an ISP (Image Signal Processor).

[0124] At this time, the image signal processing unit 220 may include a lens shading compensation unit (not shown). The lens shading compensation unit is a module for compensating for a lens shading phenomenon that differs in the amount of light in the central area and the edge area of ​​the image, and receives a lens shading setting value from the control unit 270 described below, and compensates for the colors of the central area and the edge area of ​​the image.

[0125] In addition, the lens shading compensation unit may receive shading variables that are set differently according to the type of illumination, and process the lens shading of the image according to the received variables. Therefore, the lens shading compensation unit may perform lens shading processing by applying shading degrees differently according to the type of illumination. At the same time, the lens shading compensation unit may receive shading variables that are set differently according to the automatic exposure weight applied to a specific area of ​​the image so as to prevent saturation from occurring in the image, and process the lens shading of the image according to the received variables. More specifically, the lens shading compensation unit compensates for brightness changes that occur in the edge area of ​​the image signal when the automatic exposure weight is applied to the central area of ​​the image signal. That is, when saturation of the image signal occurs due to illumination, since the intensity of light decreases from the center to the edge in concentric circles, the lens shading compensation unit amplifies the edge signal of the image signal to compensate for the brightness compared to the center.

[0126] Meanwhile, the image signal processing unit 220 can measure the clarity of the image acquired by the image sensor 210. That is, the image signal processing unit 220 can measure the clarity of the image in order to check the focusing accuracy of the image acquired by the image sensor 210. The clarity can be measured for each image acquired according to the position of the focusing lens.

[0127] The display unit 230 displays a captured image according to control of the control unit 270 described below, and displays a setting screen required for taking a photo or a screen for selecting a user action.

[0128] The lens driving unit 240 moves the lens barrel 120. For example, the lens driving unit 240 can move the lens barrel 120 in the optical axis direction.

[0129] The position sensor unit 250 can detect the position of the lens barrel 120 moved by the lens driving unit 240 .

[0130] Preferably, the position sensor unit 250 can detect the current position of the lens barrel 120 and the movement position of the lens barrel 120 moved by the lens driving unit 240 .

[0131] In addition, the position sensor unit 250 can output a detection signal corresponding to the position of the lens barrel 120 .

[0132] The position sensor unit 250 includes a plurality of sensor units.

[0133] For example, the position sensor unit 250 can include a first sensor unit 251 and a second sensor unit 252 .

[0134] Each of the first sensor unit 251 and the second sensor unit 252 includes a plurality of input terminals and a plurality of output terminals. In addition, the plurality of output terminals of the first sensor unit 251 are not connected to the plurality of output terminals of the second sensor unit 252. Here, not connected means that the plurality of output terminals of the first sensor unit 251 and the plurality of output terminals of the second sensor unit 252 are not directly connected to each other (e.g., connected in series and / or connected in parallel).

[0135] For example, a plurality of output terminals of the first sensor unit 251 and a plurality of output terminals of the second sensor unit 252 are respectively connected to the control unit 270 to be described later. In addition, the control unit 270 can detect the position of the lens barrel 120 based on the signal output from each output terminal of the first sensor unit 251 and the second sensor unit 252. That is, the control unit 270 is connected to the first sensor unit 251 and the second sensor unit 252, and can obtain position information based on the output signals of the first sensor unit 251 and the second sensor unit 252. The position information can represent the position information of the moving part of the camera module. For example, the position information can be the position information of the lens barrel 120 or the lens 110. This will be described in more detail below.

[0136] The storage unit 260 stores data required for the operation of the camera module 100. In particular, the storage unit 260 can store position information of the lens barrel 120 according to the distance from the subject. For example, the storage unit 260 can store information about a focus position for focusing on the subject. The information about the focus position can be position information of the lens barrel 120 for accurately focusing on the subject. In addition, the focus position can be changed according to the distance from the subject. Therefore, the storage unit 260 can store data corresponding to the position of the lens barrel 120 according to the distance.

[0137] The control unit 270 controls the overall operation of the camera module.

[0138] In particular, the control unit 270 controls the position sensor unit 250 .

[0139] For example, the control unit 270 can provide a bias current to the position sensor unit 250 to drive the position sensor unit 250. In addition, when the magnetic flux passes through the position sensor unit 250, a Hall voltage can be generated in a direction perpendicular to the bias current and the magnetic flux. At this time, the Hall voltage can correspond to the intensity of the magnetic flux. In addition, the intensity of the magnetic flux can correspond to the position of the lens barrel 120. Therefore, the control unit 270 can detect the position of the lens barrel 120 using the Hall voltage output by the position sensor unit 250.

[0140] When the current position of the lens barrel 120 is detected, the control unit 270 outputs a control signal to move the lens barrel 120 to a target position based on the current position of the lens barrel 120. The control signal may be the direction and intensity of a driving current supplied to a first coil (not shown) of the lens driving unit 240.

[0141] At this time, a plurality of first output signals outputted through a plurality of output terminals of the first sensor unit 251 are inputted to the control unit 270. In addition, a plurality of second output signals outputted through a plurality of output terminals of the second sensor unit 252 are inputted to the control unit 270.

[0142] In addition, the control unit 270 receives a plurality of first output signals and a plurality of second output signals. For this purpose, the control unit 270 includes a port for receiving the plurality of first output signals and the plurality of second output signals. For example, the control unit 270 can receive the plurality of first output signals and the plurality of second output signals separately. For this purpose, the control unit 270 can include four ports.

[0143] In addition, the control unit 270 can differentially amplify the four output signals received through the four ports. At this time, the differential amplified signal can correspond to the position detection signal of the lens barrel 120 obtained by the combination of the output signals of the first sensor unit 251 and the second sensor unit 252. In addition, the control unit 270 can detect the current position and the moving position of the lens barrel 120 based on the position detection signal obtained by the combination of the output signals.

[0144] In addition, the control unit 270 can output a control signal for moving the lens barrel 120 to a target position based on the current position and the moving position. In addition, the lens driving unit 240 can move the lens barrel 120 to a target position based on the control signal.

[0146] Hereinafter, a connection relationship between the position sensor unit 250 and the control unit 270 of the embodiment and a position detection operation of the lens barrel 120 using the connection relationship will be described in detail.

[0147] Figure 5 is a view illustrating a connection relationship of a position sensor unit according to an embodiment, Figure 6 is a view showing a connection relationship of a position sensor unit of a comparative example compared with the embodiment, and Figure 7 2 is a view illustrating a connection relationship between a position sensor unit and a control unit according to an embodiment.

[0148] refer to Figure 5 , the position sensor unit 250 of the embodiment includes a first sensor unit 251 and a second sensor unit 252 .

[0149] At this time, the first sensor unit 251 may include a plurality of first input terminals and a plurality of first output terminals. At this time, the plurality of first input terminals may represent power input terminals for inputting power to the first sensor unit 251. In addition, the plurality of first output terminals may represent signal output terminals for outputting output signals of the first sensor unit 251. The output signal of the first sensor unit 251 may correspond to a position detection signal of the lens barrel 120 detected by the first sensor unit 251.

[0150] The first input terminal of the first sensor unit 251 may include a first-first input terminal 251 a and a first-second input terminal 251 b .

[0151] The first-first input terminal 251a may be a terminal into which positive polarity (+) power is input. The first-second input terminal 251b may be a terminal into which negative polarity (-) power is input.

[0152] In addition, the first output terminal of the first sensor unit 251 may include a first-first output terminal 251 c and a first-second output terminal 251 d .

[0153] The first-first output terminal 251c may be a terminal from which a negative polarity (-) output signal is outputted. The first-second output terminal 251d may be a terminal from which a positive polarity (+) output signal is outputted.

[0154] In addition, the second sensor unit 252 may include a plurality of second input terminals and a plurality of second output terminals. At this time, the plurality of second input terminals may represent power input terminals for inputting power to the second sensor unit 252. In addition, the plurality of second output terminals may represent signal output terminals for outputting output signals of the second sensor unit 252. The output signals of the second sensor unit 252 may correspond to position detection signals of the lens barrel 120 detected by the second sensor unit 252.

[0155] The second input terminal of the second sensor unit 252 may include a second-first input terminal 252 a and a second-second input terminal 252 b .

[0156] The second-first input terminal 252a may be a terminal into which positive polarity (+) power is input. The second-second input terminal 252b may be a terminal into which negative polarity (-) power is input.

[0157] In addition, the second output terminal of the second sensor unit 252 may include a second-first output terminal 252c and a second-second output terminal 252d.

[0158] The second-first output terminal 252c may be a terminal from which a negative polarity (-) output signal is outputted. The second-second output terminal 252d may be a terminal from which a positive polarity (+) output signal is outputted.

[0159] The bias current may be input to the first-first input terminal 251 a of the first sensor unit 251 and the second-first input terminal 252 a of the second sensor unit 252 .

[0160] To this end, the position sensor unit 250 may include a bias current providing unit 253. The bias current providing unit 253 may provide a bias current to each of the first-first input terminal 251a of the first sensor unit 251 and the second-first input terminal 252a of the second sensor unit 252.

[0161] At this time, the bias current providing unit 253 can be configured as a circuit that robustly generates a bias current for an external environment or process deviation, such as a bandgap reference circuit. For example, the bias current providing unit 253 may include a transistor (not shown). In addition, the bias current providing unit 253 may be configured so that a bias current is formed between the drain / source terminals of the transistor according to a voltage applied to the gate terminal of the transistor. For example, the bias current providing unit 253 may receive a digital control signal and generate an analog voltage corresponding to the digital control signal. At this time, the analog voltage may be applied to the gate terminals of the transistor or some transistors of the bandgap reference circuit.

[0162] At this time, the bias current providing unit 253 may be commonly connected to the first-first input terminal 251a of the first sensor unit 251 and the second-first input terminal 252a of the second sensor unit 252. Therefore, the common bias current output from the bias current providing unit 253 may be provided to the first-first input terminal 251a of the first sensor unit 251 and the second-first input terminal 252a of the second sensor unit 252.

[0163] However, the embodiment is not limited thereto. For example, the first-second input terminal 251b of the first sensor unit 251 and the second-first input terminal 252a of the second sensor unit 252 may be directly connected to each other. Therefore, the bias current providing unit 253 is capable of providing a bias current to the first-first input terminal 251a of the first sensor unit 251. In addition, the second sensor unit 252 is capable of receiving a bias current sent from the first-second input terminal 251b of the first sensor unit 251 through the second-first input terminal 252a.

[0164] The equivalent circuit of each of the first sensor unit 251 and the second sensor unit 252 can include a plurality of Hall sensor resistors. For example, each of the first sensor unit 251 and the second sensor unit 252 can have an equivalent circuit including a first resistor to a fourth resistor. In addition, a bias current can flow through the first resistor to the fourth resistor of each of the first sensor unit 251 and the second sensor unit 252. However, the equivalent circuit of the first sensor unit 251 and the second sensor unit 252 of the embodiment can be implemented as various types of equivalent circuits other than the equivalent circuit including the first resistor to the fourth resistor.

[0165] Meanwhile, the first sensor unit 251 and the second sensor unit 252 of the embodiment may be Hall sensors. The Hall sensor may detect a magnetic flux passing through the Hall sensor by using the Hall effect.

[0166] For example, the first sensor unit 251 may be a first Hall sensor. In addition, when the magnetic flux passes through the first Hall sensor, the first Hall sensor may generate a bias current and a Hall voltage in a direction perpendicular to the magnetic flux. In addition, the generated Hall voltage may be output to the first-first output terminal 251c and the first-second output terminal 251d of the first sensor unit 251 corresponding to the first Hall sensor. For example, the difference between the voltages output to the first-first output terminal 251c and the first-second output terminal 251d of the first sensor unit 251 may correspond to the generated Hall voltage. Therefore, the difference between the output signals output by the first-first output terminal 251c and the first-second output terminal 251d of the first sensor unit 251 may be used as a measured value of the magnetic flux passing through the first sensor unit 251. In addition, the measured value may be used as a position detection signal of the lens barrel 120 obtained by the first sensor unit 251.

[0167] In response to this, the second sensor unit 252 may be a second Hall sensor. In addition, when the magnetic flux passes through the second Hall sensor, the second Hall sensor may generate a Hall voltage in a direction perpendicular to the bias current and the magnetic flux. In addition, the generated Hall voltage may be output to the second-first output terminal 252c and the second-second output terminal 252d of the second sensor unit 252 corresponding to the second Hall sensor. For example, the difference between the voltages output to the second-first output terminal 252c and the second-second output terminal 252d of the second sensor unit 252 may correspond to the generated Hall voltage. Therefore, the difference between the output signals output by the second-first output terminal 252c and the second-second output terminal 252d of the second sensor unit 252 may be used as a measured value of the magnetic flux passing through the second sensor unit 252. In addition, the measured value may be used as a position detection signal of the lens barrel 120 obtained by the second sensor unit 252.

[0168] Meanwhile, the first-first output terminal 251 c and the first-second output terminal 251 d of the first sensor unit 251 are not directly connected to the second-first output terminal 252 c and the second-second output terminal 252 d of the second sensor unit 252 .

[0169] Specifically, the first-first output terminal 251 c and the first-second output terminal 251 d of the first sensor unit 251 and the second-first output terminal 252 c and the second-second output terminal 252 d of the second sensor unit 252 are connected to different ports of the control unit 270 , respectively.

[0170] For example, the first-first output signal (N1output) of the first-first output terminal 251c of the first sensor unit 251, the first-second output signal (P1output) of the first-second output terminal 251d, the second-first output signal (N2output) of the second-first output terminal 252c of the second sensor unit 252, and the second-second output signal (P2output) of the second-second output terminal 252d are all sent to the control unit 270. Therefore, the control unit 270 receives the first-first output signal (N1output) of the first-first output terminal 251c, the first-second output signal (P1output) of the first-second output terminal 251d, the second-first output signal (N2output) of the second-first output terminal 252c, and the second-second output signal (P2output) of the second-second output terminal 252d separately or independently.

[0171] In addition, the control unit 270 can obtain a position detection signal of the lens barrel 120 through selective combination of four output signals output from the first sensor unit 251 and the second sensor unit 252. A detailed configuration of the control unit 270 will be described in more detail below.

[0172] As described above, the camera module of the embodiment includes the first sensor unit 251 and the second sensor unit 252. In addition, the first-first output terminal 251c, the first-second output terminal 251d, the second-first output terminal 252c, and the second-second output terminal 252d of the first sensor unit 251 and the second sensor unit 252 are connected to different ports of the control unit 270. Accordingly, the control unit 270 can process the first-first output signal (N1output), the first-second output signal (P1output), the second-first output signal (N2output), and the second-second output signal (P2output), respectively.

[0173] At this time, the control unit includes two ports and may thus be able to receive differential signals of two sensor units.

[0174] For example, refer to Figure 6 , a comparative example compared with the present embodiment includes a plurality of sensor units and a control unit connected to the plurality of sensor units.

[0175] The comparative example includes a first sensor unit 51 and a second sensor unit 52 .

[0176] The first sensor unit 51 includes a plurality of first input terminals and a plurality of first output terminals.

[0177] In addition, the first input terminal of the first sensor unit 51 includes a first-first input terminal 51 a and a first-second input terminal 51 b .

[0178] In addition, the first output terminal of the first sensor unit 51 includes a first-first output terminal 51 c and a first-second output terminal 51 d .

[0179] In addition, the second sensor unit 52 includes a plurality of second input terminals and a plurality of second output terminals.

[0180] The second input terminal of the second sensor unit 52 includes a second-first input terminal 52 a and a second-second input terminal 52 b .

[0181] In addition, the second output terminal of the second sensor unit 52 includes a second-first output terminal 52c and a second-second output terminal 52d.

[0182] The bias current supply unit 53 supplies bias current to the first-first input terminal 51a of the first sensor unit 51 and the second-first input terminal 52a of the second sensor unit 52, respectively. That is, a common bias current is output from the bias current supply unit 53 and is supplied to the first-first input terminal 51a of the first sensor unit 51 and the second-first input terminal 52a of the second sensor unit 52.

[0183] At this time, one of the plurality of first output terminals of the first sensor unit 51 of the comparative example is directly connected to one of the plurality of second output terminals of the second sensor unit 52 .

[0184] Specifically, the comparative example has a structure in which the first-second output terminal 51d of the first sensor unit 51 and the second-first output terminal 52c of the second sensor unit 52 are directly connected to each other. For example, in the comparative example, a connection line CL is formed between the first-second output terminal 51d of the first sensor unit 51 and the second-first output terminal 52c of the second sensor unit 52. Therefore, the control unit of the comparative example includes only two input ports. Specifically, the control unit of the comparative example includes only a first port connected to the first-first output terminal 51c of the first sensor unit 51 and a second port connected to the second-second output terminal 52d of the second sensor unit 52. Thus, the control unit of the comparative example is provided with signals corresponding to only two of the four output terminals of the first sensor unit 51 and the second sensor unit 52 through the first port and the second port. That is, the differential signal between the first sensor unit 51 and the second sensor unit 52 is input to the control unit of the comparative example.

[0185] However, the comparative example has a problem in that a connection line (CL) for connecting the output terminals of the two sensor units must be provided on a circuit board (not shown), and the manufacturing process of the circuit board becomes complicated.

[0186] In addition, the comparative example has a problem in that when the output signal is transmitted through the connection line (CL), the output signal includes noise according to various use environments, and the detection accuracy is reduced accordingly.

[0187] In addition, the comparative example provides two signals fixed to the control unit. That is, the control unit of the comparative example only provides the output signal of the first-first output terminal 51c of the first sensor unit 51 and the output signal of the second-second output terminal 52d of the second sensor unit 52. Therefore, the control unit of the comparative example performs limited arithmetic operations. That is, the control unit of the comparative example can only perform addition or subtraction operations of the output signal of the first sensor unit 51 and the output signal of the second sensor unit. Therefore, it is difficult for the comparative example to effectively respond to various usage environments of the camera module.

[0188] In addition, the comparative example cannot obtain a position detection signal of the lens barrel using only the output signal of the first sensor unit 51 , or cannot obtain a position detection signal of the lens barrel using only the output signal of the second sensor unit 52 .

[0189] Therefore, refer again Figure 5 , the embodiment provides two output signals of the first sensor unit 251 and two output signals of the second sensor unit 252 to the control unit 270, respectively. Then, the control unit 270 receives the four output signals and obtains a final position detection signal through selective operation of the four output signals.

[0190] Therefore, the embodiment can obtain a position detection signal through a subtraction operation of two output signals of the first sensor unit 251 and two output signals of the second sensor unit 252 under the first condition.

[0191] In addition, the embodiment can obtain a position detection signal by adding two output signals of the first sensor unit 251 and two output signals of the second sensor unit 252 under the second condition.

[0192] In addition, the embodiment can obtain a position detection signal using only two output signals of the first sensor unit 251 under the third condition.

[0193] In addition, the embodiment can obtain a position detection signal using only two output signals of the second sensor unit 252 under the fourth condition.

[0194] For this purpose, refer to Figure 7, the control unit 270 includes a port unit 271 connected to the position sensor unit 250. At this time, the port unit 271 may include a plurality of ports. At this time, the port unit 271 may include four ports. And, two of the four ports can be connected to the two output terminals of the first sensor unit 251, and the remaining two ports can be connected to the two output terminals of the second sensor unit 252.

[0195] At this time, the port unit 271 of the control unit 270 is illustrated in the drawing as including four ports, but is not limited thereto.

[0196] For example, as the stroke of the camera module increases, the detection range of the position sensor unit must increase. Therefore, it may not be possible to cover the entire detection range corresponding to the stroke of the camera module using two sensor units. Therefore, the camera module can use three or more sensor units to detect the position of the lens module. In this case, the control unit 270 can include six or more ports. In the following, it will be assumed that the control unit 270 is a four-channel driver IC for description, and accordingly, the port unit 271 includes four ports.

[0197] The port unit 271 of the control unit 270 includes a first port to a fourth port.

[0198] The port unit 271 may include a first port 271a connected to the first-first output terminal 251c of the first sensor unit 251. The first port 271a may receive a first-first output signal (N1output) output through the first-first output terminal 251c of the first sensor unit 251.

[0199] The port unit 271 may include a second port 271b connected to the first-second output terminal 251d of the first sensor unit 251. The second port 271b may receive a first-second output signal (P1output) output through the first-second output terminal 251d of the first sensor unit 251.

[0200] The port unit 271 may include a third port 271c connected to the second-first output terminal 252c of the second sensor unit 252. The third port 271c may receive a second-first output signal (N2output) output through the second-first output terminal 252c of the second sensor unit 252.

[0201] The port unit 271 may include a fourth port 272b connected to the second-second output terminal 252d of the second sensor unit 252. The fourth port 272b may receive a second-second output signal (P2output) output through the second-second output terminal 252d of the second sensor unit 252.

[0203] Hereinafter, the detailed configuration of the control units of the embodiment and the connection relationship therebetween will be described.

[0204] Figure 8 is a block diagram showing a detailed configuration of a control unit of the first embodiment, Fig. 9 Yes Description Figure 8 A view of the connection relationship between the multiplexer and the amplifier of the control unit, Fig.10 is a diagram illustrating the switching state of the multiplexer and the input signal of the amplifier under the first condition, Fig.11 Yes Description Fig.10 A view of the amplifier output signal, Fig.12 is a view illustrating the switching state of the multiplexer and the input signal of the amplifier under the second condition, and Fig.13 Yes Description Fig.12 A view of the output signal of the amplifier.

[0205] refer to Figure 8 and Fig. 9 , the control unit 270 may include a port unit 271, a multiplexer 272, an amplifier (AMP, 273) and an analog-to-digital converter (ADC, 274).

[0206] The port unit 271 includes first to fourth ports 271 a , 271 b , 271 c , and 271 d connected to two output ends of the first sensor unit 251 and two output ends of the second sensor unit 252 , respectively.

[0207] The multiplexer 272 may be disposed between the port unit 271 and the amplifier 273 .

[0208] The multiplexer 272 may be configured in plural.

[0209] The multiplexer 272 in the first embodiment includes two multiplexers. One of the two multiplexers is connected to a port connected to one of the two output terminals of the first sensor unit 251. In addition, any one of the two multiplexers is connected to a port connected to one of the two output terminals of the second sensor unit 252.

[0210] The multiplexer 272 may also be referred to as a switching unit. That is, the multiplexer 272 can selectively output an input signal to one of the input terminals of the amplifier 273. For example, the amplifier 273 can include an inverting terminal 273-1 and a non-inverting terminal 273-2.

[0211] In addition, the multiplexer 272 can selectively output the input signal to one of the inverting terminal 273 - 1 and the non-inverting terminal 273 - 2 of the amplifier 273 .

[0212] To this end, the multiplexer 272 includes a first multiplexer 272 a connected to one port among the first to fourth ports 271 a , 271 b , 271 c , and 271 d to which the first sensor unit 251 is connected.

[0213] Specifically, the first multiplexer 272a can be connected to the first port 271a. Thus, the first multiplexer 272a can receive the first-first output signal (N1output) output through the first-first output terminal 251c of the first sensor unit 251 through the first port 271a.

[0214] In addition, the first multiplexer 272a may transmit the received first-first output signal (N1output) to the amplifier 273. Preferably, the first multiplexer 272a is selectively connected to the inverting terminal 273-1 or the non-inverting terminal 273-2 of the amplifier 273.

[0215] Specifically, the first multiplexer 272a can be connected to the inverting terminal 273-1 of the amplifier 273 under the first condition. Therefore, the first multiplexer 272a can transmit the first-first output signal (N1output) transmitted from the first port 271a to the inverting terminal 273-1 of the amplifier 273 under the first condition.

[0216] Furthermore, the first multiplexer 272a can be connected to the non-inverting terminal 273-2 of the amplifier 273 under the second condition. Therefore, the first multiplexer 272a can transmit the first-first output signal (N1output) transmitted from the first port 271a to the non-inverting terminal 273-2 of the amplifier 273 under the second condition.

[0217] In addition, the multiplexer 272 includes a second multiplexer 272 b connected to one port among the first to fourth ports 271 a , 271 b , 271 c , and 271 d connected to the second sensor unit 252 .

[0218] Specifically, the second multiplexer 272b can be connected to the fourth port 271d. Thus, the second multiplexer 272b can receive the second-second output signal (P2output) output through the second-second output terminal 252d of the second sensor unit 252 through the fourth port 271d.

[0219] In addition, the second multiplexer 272b may transmit the received second-second output signal (P2output) to the amplifier 273. Preferably, the second multiplexer 272b is selectively connected to one of the inverting terminal 273-1 and the non-inverting terminal 273-2 of the amplifier 273.

[0220] Specifically, the second multiplexer 272b can be connected to the non-inverting terminal 273-2 of the amplifier 273 under the first condition. Therefore, under the first condition, the second multiplexer 272b can transmit the second-second output signal (P2output) transmitted from the fourth port 271d to the non-inverting terminal 273-2 of the amplifier 273.

[0221] In addition, the second multiplexer 272b can be connected to the inverting terminal 273-1 of the amplifier 273 under the second condition. Therefore, the second multiplexer 272b can transmit the second-second output signal (P2output) transmitted from the fourth port 271d to the inverting terminal 273-1 of the amplifier 273 under the second condition.

[0222] The amplifier 273 includes an inverting terminal 273-1 and a non-inverting terminal 273-2. The amplifier 273 can differentially amplify and output a signal input to the inverting terminal 273-1 and a signal input to the non-inverting terminal 273-2.

[0223] At this time, the signal output from the first sensor unit 251 and the second sensor unit 252 has a size of several mV. This is significantly different from the input range of the analog-to-digital conversion unit 274 provided at the rear end of the amplifier 273. Therefore, the amplifier 273 differentially amplifies and outputs the signal input through the inverting terminal 273-1 and the non-inverting terminal 273-2 to generate an output signal corresponding to the input range of the analog-to-digital conversion unit 274.

[0224] The analog-to-digital conversion unit 274 receives the analog signal from the amplifier 273 , and converts the received analog signal into a digital signal and outputs the converted digital signal accordingly.

[0225] Preferably, the analog-to-digital conversion unit 274 receives the analog signal from the amplifier 273 and outputs the analog signal as a multi-bit digital signal. At this time, the output signal of the analog-to-digital conversion unit 274 can be represented by values ​​of 0 and 1.

[0226] At this time, the inverting terminal 273 - 1 of the amplifier 273 includes a first inverting terminal 273 - 1 a and a second inverting terminal 273 - 1 b .

[0227] The first inverting terminal 273-1a is connected to the first multiplexer 272a or the second multiplexer 272b. For example, the first inverting terminal 273-1a is connected to the first multiplexer 272a under the first condition. Then, the first-first output signal (N1output) sent through the first port 271a can be input to the first inverting terminal 273-1a of the amplifier 273 under the first condition. In addition, the first inverting terminal 273-1a is connected to the second multiplexer 272b under the second condition. Then, the second-second output signal (P2output) sent through the fourth port 271d can be input to the first inverting terminal 273-1a of the amplifier 273 under the second condition.

[0228] The second inverting terminal 273-1b is fixedly connected to any one of the first to fourth ports 271a, 271b, 271c, and 271d of the port unit 271. For example, the second inverting terminal 273-1b in the first embodiment is fixedly connected to any one of the first to fourth ports 271a, 271b, 271c, and 271d. Specifically, the second inverting terminal 273-1b in the first embodiment is fixedly connected to the third port 271c. The second inverting terminal 273-1b is connected to the third port 271c under both the first condition and the second condition. Accordingly, the second-first output signal (N2output) sent through the third port 271c can be input to the second inverting terminal 273-1b.

[0229] Meanwhile, the amplifier 273 can include a first adder (not shown). That is, the inverting terminal 273-1 can include a first adder. Accordingly, a signal obtained by adding a signal input to the first inverting terminal 273-1a and a signal input to the second inverting terminal 273-1b can be input to the inverting terminal 273-1 of the amplifier 273.

[0230] In addition, the non-inverting terminal 273 - 2 of the amplifier 273 includes a first non-inverting terminal 273 - 2 a and a second non-inverting terminal 273 - 2 b .

[0231] The first non-inverting terminal 273-2a is connected to the first multiplexer 272a or the second multiplexer 272b. For example, the first non-inverting terminal 273-2a is connected to the second multiplexer 272b under the first condition. In addition, under the first condition, the second-second output signal (P2output) transmitted through the fourth port 271d can be input to the first non-inverting terminal 273-2a of the amplifier 273. In addition, the first non-inverting terminal 273-2a is connected to the first multiplexer 272a under the second condition. In addition, under the second condition, the first non-inverting terminal 273-2a of the amplifier 273 can input the first-first output signal (N1output) transmitted through the first port 271a.

[0232] The second non-inverting terminal 273-2b is fixedly connected to any one of the first to fourth ports 271a, 271b, 271c, 271d of the port unit 271. For example, the second non-inverting terminal 273-2b in the first embodiment is fixedly connected to any one of the first to fourth ports 271a, 271b, 271c and 271d. Specifically, the second non-inverting terminal 273-2b in the first embodiment is fixedly connected to the second port 271b. The second non-inverting terminal 273-2b is connected to the second port 271b under both the first condition and the second condition. Accordingly, the first-second output signal (P1output) sent through the second port 271b can be input to the second non-inverting terminal 273-2b.

[0233] At the same time, the amplifier 273 can include a second adder (not shown). That is, the non-inverting terminal 273-2 can include a second adder. Accordingly, a signal obtained by adding a signal input to the first non-inverting terminal 273-2a and a signal input to the second non-inverting terminal 273-2b can be input to the non-inverting terminal 273-2 of the amplifier 273.

[0234] As described above, the camera module of the first embodiment includes the first multiplexer 272a and the second multiplexer 272b, thereby enabling one of the plurality of output signals of the first sensor unit 251 and the second sensor unit 252 to be selectively connected to the first inverting terminal 273-1a and the first non-inverting terminal 273-2a of the amplifier 273.

[0235] In addition, the amplifier 273 outputs a first differential amplified signal that differentially amplifies a signal input to the inverting terminal 273-1 and a signal input to the non-inverting terminal 273-2 under a first condition. In addition, the amplifier 273 outputs a second differential amplified signal that differentially amplifies a signal input to the inverting terminal 273-1 and a signal input to the non-inverting terminal 273-2 under a second condition.

[0236] The first condition and the second condition may be determined according to the use environment of the camera module. For example, the form of the noise (e.g., common mode noise) sent to the camera module may vary according to the use location or surrounding structure of the camera module. In addition, the embodiment determines one of the first condition and the second condition based on the current use environment so as to improve the position detection accuracy of the lens barrel 120.

[0237] refer to Fig.10 and Fig.11 , under the first condition, the first multiplexer 272a is connected to the first inverting terminal 273-1a of the amplifier 273. In addition, under the first condition, the second multiplexer 272b is connected to the first non-inverting terminal 273-2a of the amplifier 273. That is, the amplifier 273 is able to differentially amplify the subtraction value of the output signals of the first sensor unit 251 and the second sensor unit 252 under the first condition. Therefore, Fig.11 The first differential amplified signal (AMP_output) in may be a signal that amplifies the difference between the first added value input to the inverting terminal 273-1 and the second added value input to the non-inverting terminal 272-2 under the first condition. The first added value is the output value of the first adder (not shown) of the amplifier 273, and the second added value is the output value of the second adder (not shown). Under the first condition, the first added value represents the added value of the first-first output signal (N1output) of the first sensor unit 251 and the second-first output signal (N2output) of the second sensor unit 252. In addition, under the first condition, the second added value represents the first-second output signal (P1output) of the first sensor unit 251 and the second-second output signal (P2output) of the second sensor unit 252. In addition, under the first condition, the first differential amplified signal (AMP_output) may represent 1 / 2 of a subtraction value of a first detection signal (Hall1_output) obtained through a plurality of output signals of the first sensor unit 251 and a second detection signal (Hall2_output) obtained through a plurality of output signals of the second sensor unit 252 (eg, (Hall1_output−Hall2_output) / 2).

[0238] refer to Fig.12 and Fig.13, under the second condition, the first multiplexer 272a is connected to the first non-inverting terminal 273-2a of the amplifier 273. In addition, under the second condition, the second multiplexer 272b is connected to the first inverting terminal 273-1a of the amplifier 273. That is, the amplifier 273 can be a signal that amplifies the difference between the first added value input to the inverting terminal 273-1 and the second added value input to the non-inverting terminal 272-2 under the second condition. The first added value is the output value of the first adder (not shown) of the amplifier 273, and the second added value is the output value of the second adder (not shown). Under the second condition, the first added value represents the second-first output signal of the second sensor unit 251. (N2output) and the addition value of the second-second output signal (P2output). In addition, under the second condition, the second addition value represents the addition value of the first-first output signal (N1output) of the first sensor unit 251 and the first-second output signal (P1output) of the first sensor unit 251. In addition, under the second condition, the second differential amplification signal (AMP_output) can represent 1 / 2 of the addition value of the first detection signal (Hall1_output) obtained through the multiple output signals of the first sensor unit 251 and the second detection signal (Hall2_output) obtained through the multiple output signals of the second sensor unit 252 (for example, (Hall1_output+Hall2_output) / 2).

[0239] That is, in the embodiment, the first multiplexer 272a and the second multiplexer 272b are controlled according to the use environment of the camera module. Accordingly, different signals can be input to the inverting terminal 273-1 and the non-inverting terminal 273-2 of the amplifier 273 according to the conditions. In addition, the amplifier 273 can generate an output signal of a subtraction value of the output signals of the first sensor unit 251 and the second sensor unit 252 that are differentially amplified under the first condition. In addition, the amplifier 273 can generate an output signal of an addition value of the output signals of the first sensor unit 251 and the second sensor unit 252 that are differentially amplified under the second condition. Therefore, the embodiment can generate a differential amplified signal that is robust to noise. Therefore, the embodiment can improve the position detection accuracy of the lens module.

[0241] Fig.14 is a block diagram showing a detailed configuration of a control unit of the second embodiment, and Fig.15 It is used to illustrate Fig.14 A view of the connection relationship between the multiplexer and the amplifier of a control unit.

[0242] Hereinafter, only the parts of the configuration of the second embodiment that are different from those of the first embodiment will be described.

[0243] The control unit of the first embodiment includes only two multiplexers. Therefore, one of the two inverting terminals of the amplifier 273 of the first embodiment is connected to one of the two multiplexers, and the other of the two inverting terminals of the amplifier 273 of the first embodiment is fixedly connected to one of the first to fourth ports 271a, 271b, 271c, and 271d. In addition, one of the two non-inverting terminals of the amplifier 273 of the first embodiment is connected to the other of the two multiplexers, and the other of the two inverting terminals of the amplifier 273 of the first embodiment is fixedly connected to the other of the first to fourth ports 271a, 271b, 271c, and 271d.

[0244] The control unit 270 of the second embodiment may include four multiplexers.

[0245] That is, the control unit 270 includes the first multiplexer 272a and the second multiplexer 272b which are the same as those of the first embodiment.

[0246] In addition, the control unit 270 may further include a third multiplexer 272c and a fourth multiplexer 272d.

[0247] The third multiplexer 272c may be connected to the second port 271b. Thus, the third multiplexer 272c can receive the first-second output signal (P1output) output through the first-second output terminal 251d of the first sensor unit 251 through the second port 271b.

[0248] In addition, the third multiplexer 272c is capable of sending the received first-second output signal (P1output) to the amplifier 273. Preferably, the third multiplexer 272c is selectively connected to one of the inverting terminal 273-1 and the non-inverting terminal 273-2 of the amplifier 273. However, the embodiment is not limited thereto. For example, the third multiplexer 272c can be fixedly connected to the second non-inverting terminal 273-2b of the amplifier 273.

[0249] In addition, the fourth multiplexer 272d may be connected to the third port 271c. Thus, the fourth multiplexer 272d may receive the second-first output signal (N2output) output through the second-first output terminal 251c of the second sensor unit 252 through the third port 271c.

[0250] In addition, the fourth multiplexer 272d can send the received second-first output signal (N2output) to the amplifier 273. Preferably, the fourth multiplexer 272d is selectively connected to one of the inverting terminal 273-1 and the non-inverting terminal 273-2 of the amplifier 273. However, the embodiment is not limited thereto. For example, the fourth multiplexer 272d can be fixedly connected to the second inverting terminal 273-1b of the amplifier 273.

[0251] The control unit 270 of the second embodiment includes four multiplexers, and the four multiplexers can selectively output each of the two output signals of the first sensor unit 251 and the two output signals of the second sensor unit 252 input through the first to fourth ports 271a, 271b, 271c, and 271d to one of the two inverting terminals 273-1 and the two non-inverting terminals 273-2 of the amplifier 273. Thus, the second embodiment can differentially amplify the subtraction value of the output signals of the first sensor unit 251 and the second sensor unit 252 under the first condition, can differentially amplify the addition value of the output signals of the first sensor unit 251 and the second sensor unit 252 under the second condition, can differentially amplify the subtraction value of the output signal of the first sensor unit 251 under the third condition, and can differentially amplify the subtraction value of the output signal of the second sensor unit 252 under the fourth condition.

[0253] The embodiment as described above includes a plurality of sensor units. The plurality of sensor units may be position detection sensors for detecting the position of the lens module. The embodiment detects the position of the lens module using a plurality of sensor units. Thus, the embodiment is able to extend the detection range in response to a long stroke of the lens module. Therefore, the embodiment is able to improve the position detection accuracy of the lens module. Thus, the embodiment is able to improve the control accuracy of the lens module. Therefore, the embodiment is able to improve the operational reliability of the camera module.

[0254] In addition, each of the plurality of sensor units includes a plurality of output terminals. In addition, the plurality of output terminals are not directly connected to each other. Specifically, the plurality of output terminals are individually connected to different ports of the control unit.

[0255] Therefore, this embodiment can apply the optimal position detection condition according to the use environment of the camera module.

[0256] Specifically, the embodiment can detect the position of the lens module using a first differential amplified signal, which differentially amplifies the subtraction value of the output signal of the first sensor unit and the output signal of the second sensor unit under a first condition. In addition, the embodiment can detect the position of the lens module using a second differential amplified signal, which differentially amplifies the addition value of the output signal of the first sensor unit and the output signal of the second sensor unit under a second condition. In addition, the embodiment can detect the position of the lens module using a third differential amplified signal, which differentially amplifies the subtraction value of the output signal of the first sensor unit under a third condition. In addition, the embodiment can detect the position of the lens module using a fourth differential amplified signal, which differentially amplifies the subtraction value of the output signal of the second sensor unit under a fourth condition.

[0257] At this time, the condition can be determined according to the use environment of the camera module. For example, the form of the noise (e.g., common mode noise) sent to the camera module can vary according to the use location or surrounding structure of the camera module. In addition, the embodiment can determine one of the first condition and the second condition based on the current use environment to provide a detection signal with strong noise resistance. Therefore, the embodiment can improve the position detection accuracy of the lens barrel.

[0258] In addition, the embodiment can simplify the process of manufacturing the camera module without forming connection lines for directly connecting a plurality of sensor units to each other on a circuit board. In addition, the embodiment can improve product yield.

[0260] Fig.16 is a perspective view of an optical device according to an embodiment, and Fig.17 yes Fig.16 A configuration diagram of the optical device shown in FIG.

[0261] refer to Fig.16 and Fig.17 , the optical device may be a portable terminal. Hereinafter, the optical device is referred to as terminal 200A.

[0262] The terminal may include a body 850 , a wireless communication unit 710 , an A / V input unit 720 , a sensing unit 740 , an input / output unit 750 , a memory unit 760 , an interface unit 770 , a control unit 780 , and a power supply unit 790 .

[0263] Fig.16 The body 850 shown in FIG. 8 is in a bar shape, but is not limited thereto, and may have various structures such as a sliding type, a folding type, a swing type, a rotating type, etc., in which two or more sub-bodies are coupled to be movable relative to each other.

[0264] The body 850 may include a housing (a cover, a housing, a lid, etc.) forming an exterior. For example, the body 850 may be divided into a front housing 851 and a rear housing 852. Various electronic components of the terminal may be embedded in a space formed between the front housing 851 and the rear housing 852.

[0265] The wireless communication unit 710 may include one or more modules that enable wireless communication between the terminal 200A and a wireless communication system or between the terminal 200A and a network in which the terminal 200A is located. For example, the wireless communication unit 710 may include a broadcast receiving module 711, a mobile communication module 712, a wireless Internet module 713, a short-range communication module 714, and a location information module 715.

[0266] The A / V (audio / video) input unit 720 is used to input an audio signal or a video signal, and may include a camera 721 , a microphone 722 , and the like.

[0267] The camera 721 may include Figure 1 The camera module of the illustrated embodiment.

[0268] The sensing unit can detect the current state of the terminal 200A, such as the open / closed state of the terminal 200A, the position of the terminal 200A, the presence or absence of user contact, the orientation of the terminal 200A, the acceleration / deceleration of the terminal 200A, etc. In addition, a sensing signal for controlling the operation of the terminal 200A is generated. For example, when the terminal 200A is in the form of a slide phone, it can be sensed whether the slide phone is open or closed. In addition, the sensing unit is responsible for sensing functions related to whether the power supply unit 790 is powered, whether the interface unit 770 is coupled to an external device, etc.

[0269] The input / output unit 750 is used to generate input or output related to vision, hearing or touch. The input / output unit 750 can generate input data for operation control of the terminal 200A and can also display information processed by the terminal 200A.

[0270] The input / output unit 750 may include a keyboard unit 730, a display module 751, a sound output module 752, and a touch screen panel 753. The keyboard unit 730 may generate input data in response to a keyboard input.

[0271] The display module 751 may include a plurality of pixels whose colors vary according to electrical signals. For example, the display module 751 may include at least one of a liquid crystal display, a thin film transistor liquid crystal display, an organic light emitting diode, a flexible display, and a three-dimensional display (3D display).

[0272] The sound output module 752 may output audio data received from the wireless communication unit 710 in a call signal reception, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like; or audio data stored in the memory unit 760 .

[0273] The touch screen panel 753 may convert a change in capacitance generated due to a user's touch on a specific area of ​​the touch screen into an electric input signal.

[0274] The memory unit 760 may store programs for processing and control of the controller 780, and may temporarily store input / output data (e.g., phonebook, messages, audio, still images, photos, videos, etc.). For example, the memory unit 760 may store images captured by the camera 721, such as photos or animations.

[0275] The interface unit 770 is used as a channel for connecting to an external device connected to the terminal 200A. The interface unit 770 receives data from the external device, receives power and sends it to each component inside the terminal 200A, or sends data of the terminal 200A to the external device. For example, the interface unit 770 may include a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device with an identification module, an audio I / O (input / output) port, a video I / O (input / output) port, a headset port, etc.

[0276] The controller (controller, 780) can control the overall operation of the terminal 200A. For example, the controller 780 can perform related control and processing for voice calls, data communications, video calls, etc.

[0277] The controller 780 may include a multimedia module 781 for playing multimedia. The multimedia module 781 may be implemented within the controller 180, or may be implemented separately from the controller 780.

[0278] The controller 780 may perform a pattern recognition process capable of recognizing a handwriting input or a picture drawing input performed on the touch screen as characters and images, respectively.

[0279] The power supply unit 790 may receive external power or internal power under the control of the control unit 780 to supply power required for the operation of each component.

[0281] Although the embodiments of the present invention have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that the present invention can be implemented in other specific forms without modifying the technical spirit and essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all aspects and are not restrictive.

Claims

1. A camera module, comprising: A position sensor unit, comprising a first sensor unit and a second sensor unit; as well as a control unit connected to the first sensor unit and the second sensor unit and configured to obtain position information based on a plurality of output signals of the first sensor unit and the second sensor unit, The first sensor unit includes a plurality of first input terminals and a plurality of first output terminals. Wherein, the second sensor unit includes a plurality of second input terminals and a plurality of second output terminals, and The control unit is connected to the plurality of first output terminals and the plurality of second output terminals, and is configured to obtain the position information by selectively operating based on the plurality of output signals of the first sensor unit and the second sensor unit received through the plurality of first output terminals and the plurality of second output terminals.

2. The camera module according to claim 1, wherein: The plurality of first output terminals of the first sensor unit include: a first-first output terminal outputting a first-first output signal having a first polarity; and a first-second output terminal outputting a first-second output signal having a second polarity opposite to the first polarity, and The plurality of second output terminals of the second sensor unit include: a second-first output terminal outputting a second-first output signal having the first polarity; and a second-second output terminal outputting a second-second output signal having the second polarity.

3. The camera module according to claim 2, wherein: The control unit includes a port unit connected to the plurality of first output terminals and the plurality of second output terminals, and Wherein, the port unit comprises: a first port connected to the first-first output terminal and receiving the first-first output signal, a second port connected to the first-second output terminal and receiving the first-second output signal, a third port connected to the second-first output terminal and receiving the second-first output signal, and A fourth port is connected to the second-second output terminal and receives the second-second output signal.

4. The camera module according to claim 3, wherein: The control unit comprises: a multiplexer connected to the port unit and configured to switch the plurality of output signals received through the connected port; an amplifier configured to receive the plurality of output signals of the first sensor unit and the second sensor unit through one of the port unit and the multiplexer, and differentially amplify at least one of the received plurality of output signals; and An analog-to-digital converter is connected to the amplifier and is configured to convert an output signal of the amplifier into a digital signal.

5. The camera module according to claim 4, wherein: The amplifier includes an inverting terminal and a non-inverting terminal for receiving a plurality of output signals of the first sensor unit and the second sensor unit, The inverting terminal includes a first inverting terminal and a second inverting terminal, and The non-inverting terminal includes a first non-inverting terminal and a second non-inverting terminal, and The amplifier is configured to differentially amplify a first added value obtained by adding signals received through the first inverting terminal and the second inverting terminal and a second added value obtained by adding signals received through the first non-inverting terminal and the second non-inverting terminal.

6. The camera module according to claim 5, wherein: The multiplexer comprises: a first multiplexer connected to the first port and configured to switch the first-first output signal received through the first port to one of the first inverting terminal and the first non-inverting terminal of the amplifier; and A second multiplexer connected to the first port and configured to switch the second-second output signal received through the fourth port to any one of the first inverting terminal and the first non-inverting terminal of the amplifier.

7. The camera module according to claim 6, wherein: The second inverting terminal of the amplifier is connected to the third port and receives the second-first output signal, and The second non-inverting terminal of the amplifier is connected to the second port and receives the first-second output signal.

8. The camera module according to claim 6, wherein: The multiplexer comprises: a third multiplexer connected to the third port and configured to switch the second-first output signal received through the third port to the second inverting terminal of the amplifier; and A fourth multiplexer is connected to the second port and is configured to switch the first-second output signal received through the second port to the second non-inverting terminal of the amplifier.

9. The camera module according to claim 7 or 8, wherein: Under a first condition, the first multiplexer outputs the first-first output signal to the first inverting terminal of the amplifier, and the second multiplexer outputs the second-second output signal to the first non-inverting terminal of the amplifier, and Wherein, under a second condition different from the first condition, the first multiplexer outputs the first-first output signal to the first non-inverting terminal of the amplifier, and the second multiplexer outputs the second-second output signal to the first inverting terminal of the amplifier.

10. The camera module according to claim 9, wherein: the amplifier amplifies a difference between the first added value and the second added value and outputs the difference, Wherein, under the first condition, the first added value is the added value of the first-first output signal and the second-first output signal, the second added value is the added value of the first-second output signal and the second-second output signal, and Wherein, under the second condition, the first added value is the added value of the second-first output signal and the second-second output signal, and the second added value is the added value of the first-first output signal and the first-second output signal.

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