WO2020149606A1

WO2020149606A1 - Lens module and optical device comprising module

Info

Publication number: WO2020149606A1
Application number: PCT/KR2020/000662
Authority: WO
Inventors: 엄성수; 김원진; 엄준필
Original assignee: 엘지이노텍(주)
Priority date: 2019-01-18
Filing date: 2020-01-14
Publication date: 2020-07-23
Also published as: KR20200089897A

Abstract

A lens module according to an embodiment comprises: a first lens unit having a first cavity, and a second lens unit having a second cavity arranged to overlap the first cavity on an optical axis, wherein the first cavity includes a first opening and a second opening, which overlaps the first opening in an optical axis and is larger than the first opening, and the second cavity includes a third opening and a fourth opening, which overlaps the third opening in an optical axis, faces the second opening, and is larger than the third opening.

Description

Lens module and optical device comprising the module

Embodiments relate to a lens module and an optical device comprising the module.

Users of portable devices desire high-resolution, small-sized, and various imaging functions. For example, the various shooting functions include at least one of an optical zoom function (zoom-in/zoom-out), an auto-focusing (AF) function, or an image stabilization or image stabilization (OIS) function. Can mean

In the conventional case, in order to implement the various shooting functions described above, a method of combining a plurality of lenses and directly moving the combined lenses was used. However, if the number of lenses is increased as described above, the size of the optical device may be increased.

The autofocus and image stabilization functions are performed by moving or tilting a plurality of lenses aligned with the optical axis in the vertical direction of the optical axis or optical axis. At this time, the optical device has a limit in performing the OIS function when the amount of shaking or shaking is large.

An embodiment is to provide a lens module capable of performing OIS functions excellently and an optical device including the module.

The technical problem to be solved in the embodiment is not limited to the technical problem mentioned above, and another technical problem not mentioned will be clearly understood by a person having ordinary knowledge in the technical field to which the present invention belongs from the following description. Will be able to.

The lens module according to an embodiment may include a first lens unit having a first cavity; And a second lens unit having a second cavity disposed on the optical axis overlapping the first cavity, wherein the first cavity includes a first opening; And a second opening overlapping the first opening and the optical axis, the second opening being larger than the first opening, and wherein the second cavity includes a third opening; And a fourth opening overlapping the third opening and the optical axis and facing the second opening and larger than the third opening.

For example, the first lens unit may include first liquids that are filled, received, or disposed in the first cavity; A first upper plate having an inner surface defining a side portion of the first cavity; A second upper plate disposed on one side of the first upper plate on which the second opening is located; And a third upper plate disposed on the other side of the first upper plate in which the first opening is located, wherein the second lens unit includes second liquids filled, received, or disposed in the second cavity; A first lower plate having an inner surface defining a side portion of the second cavity; A second lower plate disposed on one side of the first lower plate on which the fourth opening is located; And a third lower plate disposed on the other side of the first lower plate on which the third opening is located.

For example, the sizes of the first opening and the third opening may be the same, and the sizes of the second opening and the fourth opening may be the same. Alternatively, sizes of the first opening and the third opening may be different, and sizes of the second opening and the fourth opening may be different.

For example, the first cavity and the second cavity may have cross-sectional shapes that are symmetrical to each other based on a horizontal plane orthogonal to the optical axis.

For example, the second upper plate and the second lower plate may be disposed spaced apart from each other in a direction parallel to the optical axis with an air spacer therebetween. Alternatively, the second upper plate and the second lower plate may be integral.

For example, the first lens unit may include an upper common electrode disposed on one side of the first upper plate; And a plurality of upper individual electrodes disposed on the other side of the first upper plate, wherein the second lens unit includes a lower common electrode disposed on one side of the first lower plate; And a plurality of lower individual electrodes disposed on the other side of the first lower plate.

For example, the first lens unit may include a first upper connection substrate electrically connected to the plurality of individual individual electrodes; And a second upper connection substrate electrically connected to the upper common electrode, wherein the second lens unit includes a first lower connection substrate electrically connected to the plurality of lower individual electrodes; And a second lower connection substrate electrically connected to the lower common electrode.

For example, the second upper connection substrate and the second lower connection substrate may be integral.

An optical device according to another embodiment includes the lens module; A prism that changes a path of light incident from the outside in the optical axis direction of the lens module; A camera actuator that performs a zooming function and an AF function on the light passing through the lens module; And an image sensor generating image data from light emitted from the camera actuator.

In the case of the lens module according to the embodiment and the optical device including the module, the second upper plate and the second lower plate are integrated, thereby reducing the overall size of the lens module.

In addition, in the case of the lens module according to the embodiment, since a plurality of lens units performing OIS functions are aligned with the optical axis, it can compensate even when the degree of shaking or hand shaking is large, and thus can have improved OIS performance and OIS function Since the plurality of lens units performing the cooperating with each other, the reaction speed may be improved than when using one lens unit.

In addition, the effects obtainable in the present embodiment are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description. There will be.

1 is a sectional view showing a lens module according to an embodiment.

2 is a sectional view showing a lens module according to another embodiment.

3 is a schematic block diagram of an optical device according to an embodiment.

4 is a block diagram according to an embodiment of the camera actuator illustrated in FIG. 3.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical spirit of the present invention is not limited to some described embodiments, and may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of its components between embodiments may be selectively selected. It can be used by bonding and substitution.

In addition, the terms used in the embodiments of the present invention (including technical and scientific terms), unless specifically defined and described, can be generally understood by those skilled in the art to which the present invention pertains. It can be interpreted as meaning, and commonly used terms, such as predefined terms, may interpret the meaning in consideration of the contextual meaning of the related technology.

In addition, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In the present specification, the singular form may also include the plural form unless specifically stated in the phrase, and is combined with A, B, C when described as “at least one (or more than one) of A and B, C”. It can contain one or more of all possible combinations.

In addition, in describing components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the term is not limited to the nature, order, or order of the component.

And, when a component is described as being'connected','coupled' or'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also to the component It may also include the case of'connected','coupled' or'connected' due to another component between the other components.

In addition, when described as being formed or disposed in the “top (top) or bottom (bottom)” of each component, the top (top) or bottom (bottom) is not only when two components are in direct contact with each other, but also one It also includes a case in which another component described above is formed or disposed between two components. In addition, when expressed as “up (up) or down (down)”, it may include the meaning of the downward direction as well as the upward direction based on one component.

The variable lens may be a variable focus lens. Also, the variable lens may be a lens whose focus is adjusted. The variable lens may be at least one of a liquid lens, a polymer lens, a liquid crystal lens, a VCM type, and an SMA type. The liquid lens may include a liquid lens including one liquid and a liquid lens including two liquids. The liquid lens including one liquid may change the focus by adjusting the membrane disposed at a position corresponding to the liquid, and for example, the focus may be changed by pressing the membrane by the electromagnetic force of the magnet and the coil. The liquid lens including two liquids may control the interface formed by the conductive liquid and the non-conductive liquid by using a voltage applied to the liquid lens, including the conductive liquid and the non-conductive liquid. The polymer lens can change the focus of the polymer material through a driving unit such as a piezo. The liquid crystal lens can change the focus by controlling the liquid crystal by electromagnetic force. The VCM type can change the focus by adjusting the solid lens or the lens assembly including the solid lens through an electromagnetic force between the magnet and the coil. The SMA type may use a shape memory alloy to control a solid lens or a lens assembly including the solid lens to change focus.

Hereinafter, the lens module according to the embodiment and the variable lens included in the optical device including the module will be described as a liquid lens, but the lens module according to the embodiment and the optical device including the module will have other forms other than the liquid lens. It may also include a variable lens.

Hereinafter, the

lens modules

100A and 100B in the embodiment and the optical device 200 including the

modules

100A and 100B will be described using a Cartesian coordinate system, but the embodiments are not limited thereto. That is, according to the Cartesian coordinate system, the x-axis, y-axis, and z-axis are orthogonal to each other, but the embodiment is not limited thereto. That is, the x-axis, y-axis, and z-axis may intersect each other instead of being orthogonal.

1 is a sectional view of a lens module 100A according to an embodiment.

The lens module 100A according to an embodiment may include first and

second lens units

110 and 120.

The first lens unit 110 according to an embodiment includes a plurality of first liquids LQ11 and LQ12 of different types, first to third upper plates P1U, P2U, and P3U, and a plurality of individual electrodes LLU ), one upper common electrode CEU and an upper insulating layer 148U.

The plurality of first liquids LQ11 and LQ12 are filled, accommodated, or disposed in the first cavity CA1, and the first liquid LQ11 having conductivity (hereinafter referred to as'first-one liquid') And a non-conductive first liquid LQ12 (hereinafter, referred to as a '1-2 liquid'). The first-first liquid (LQ11) and the first-second liquid (LQ12) do not mix with each other, and the first interface (BO10, BO11) is in contact with the portion between the first-first and first-second liquids (LQ11, LQ12). It can be formed. For example, the 1-2 liquid LQ12 may be disposed on the 1-1 liquid LQ11, but the embodiment is not limited thereto.

The first inner surface i1 of the first upper plate P1U may define a side portion of the first cavity CA1. At this time, the first inner surface i1 of the first upper plate P1U may be inclined as illustrated in FIG. 1, but the embodiment is not limited thereto.

The first cavity CA1 may include first and second openings O1 and O2. The first opening O1 is located on the other side of the first upper plate P1U and may define an upper portion of the first cavity CA1. The second opening O2 is located on one side of the first upper plate P1U and may define a lower portion of the first cavity CA1. That is, the first cavity CA1 may be defined as an area surrounded by the first inner surface i1, the first opening O1, and the second opening O2 of the first upper plate P1U.

The first opening O1 and the second opening O2 may overlap the optical axis LX. The diameter of the wider opening among the first and second openings O1 and O2 is an optical device 200 to be described later including an angle of view (FOV) required by the first lens unit 110 or the first lens unit 110 It may vary depending on the role to be played. According to an embodiment, the size (or area or width) of the first opening O1 may be smaller than the size (or area or width) of the second opening O2. Here, the size of each of the first and second openings O1 and O2 may be a cross-sectional area in a horizontal direction (eg, x-axis and y-axis directions). For example, the size of each of the first and second openings O1 and O2 may mean a radius when the cross section of the opening is circular, and may mean a length of a diagonal line when the cross section of the opening is square. Each of the first and second openings O1 and O2 may have a hole shape having a circular plane.

The first cavity CA1 is a portion through which light incident from the outside is transmitted. Therefore, the first upper plate P1U constituting the first cavity CA1 may be made of a transparent material or may contain impurities so that light is not easily transmitted.

Light may be incident through the first opening O1 that is narrower than the second opening O2 in the first cavity CA1, and may be emitted through the second opening O2, or the second that is wider than the first opening O1. It may be incident through the opening O2 and exit through the first opening O1.

In addition, the second upper plate P2U is disposed on one side (for example, below) of the first upper plate P1U where the second opening O2 is located, and the third upper plate P3U is the first opening ( O1) may be disposed on the other side (for example, the upper side) of the first upper plate P1U. That is, the second upper plate P2U may be disposed under the lower surface of the upper common electrode CEU and under the first cavity CA1. The third upper plate P3U may be disposed on the upper surface of the plurality of upper individual electrodes LLU and the first cavity CA1.

The second upper plate P2U and the third upper plate P3U may be disposed to face each other with the first upper plate P1U interposed therebetween. Also, at least one of the second upper plate P2U or the third upper plate P3U may be omitted.

At least one of the second or third upper plates P2U and P3U may have a rectangular planar shape. Each of the second and third upper plates P2U and P3U is a region through which light passes, and may be made of a light-transmissive material. For example, each of the second and third upper plates P2U and P3U may be made of glass, and may be formed of the same material for convenience of processing.

The third upper plate P3U may have a configuration that allows incident light to proceed into the first cavity CA1 of the first upper plate P1U. The second upper plate P2U may have a configuration that allows light passing through the first cavity CA1 of the first upper plate P1U to be emitted. The second upper plate P2U may directly contact the first-first liquid LQ11.

In addition, the actual effective lens area of the first lens unit 110 may be narrower than the diameter of the wide second opening O2 among the first and second openings O1 and O2 of the first upper plate P1U.

The upper common electrode CEU is disposed on one side of the first upper plate P1U (eg, below the first upper plate P1U), and the other side of the first upper plate P1U (eg, a first A plurality of upper individual electrodes LLU may be disposed on one upper plate P1U). For example, the upper common electrode CEU may be disposed to be spaced apart from the plurality of upper individual electrodes LLU in at least a portion of one side (eg, a lower surface) of the first upper plate P1U. A portion of the upper common electrode CEU disposed on one side of the first upper plate P1U is exposed to the conductive first-first liquid LQ11 to be electrically connected to the first-first liquid LQ11.

The plurality of upper individual electrodes LLU may be disposed only on the other side (for example, the upper surface) of the first upper plate P1U, but may be disposed to extend to the inner surface i1 of the first upper plate P1U. Alternatively, the first upper plate P1U may be further extended to one side (eg, a lower surface).

The upper common electrode CEU is one electrode, and the number of upper individual electrodes LLU may be two or more, for example, four or eight.

For example, the plurality of upper individual electrodes LLU may be sequentially arranged along the optical axis LX in the clockwise direction (or counterclockwise direction).

Each of the upper common electrode CEU and the plurality of upper individual electrodes LLU may be made of a conductive material, for example, metal.

Meanwhile, the upper insulating layer 148U may be disposed while covering a part of the lower surface of the third upper plate P3U in the upper region of the first cavity CA1. That is, the upper insulating layer 148U may be disposed between the 1-2 liquid LQ12 and the third upper plate P3U.

In addition, the upper insulating layer 148U may be disposed while covering a plurality of upper individual electrodes LLU. If a plurality of upper individual electrodes LLU are disposed to extend to the first inner surface i1 of the first upper plate P1U, the upper insulating layer 148U is disposed on the first inner surface i1. It may be disposed while covering the upper individual electrode (LLU). In addition, when the upper individual electrode LLU is spaced apart from the upper common electrode CEU and is further extended to the lower surface of the first upper plate P1U, the upper insulating layer 148U is the upper common electrode CEU. A portion and a plurality of upper individual electrodes LLU may be disposed while covering the entirety.

As such, the upper insulating layer 148U is in contact with the plurality of upper individual electrodes LLU and the first-first liquid LQ11, and the contact between the plurality of upper individual electrodes LLU and the 1-2 liquid LQ12, and Contact between the third upper plate P3U and the 1-2 liquid LQ12 may be blocked.

The upper insulating layer 148U covers one electrode (eg, a plurality of upper individual electrodes LLU) of the upper common electrode CEU and a plurality of upper individual electrodes LLU, and the other electrode (eg, For example, a portion of the upper common electrode CEU may be exposed to allow electric energy to be applied to the first-first liquid LQ11 having conductivity.

The second lens unit 120 according to an embodiment includes a plurality of different types of second liquids LQ21 and LQ22, first to third lower plates P1L, P2L, and P3L, and a plurality of lower individual electrodes LLL , A lower common electrode (CEL) and a lower insulating layer (148L).

The plurality of second liquids LQ21 and LQ22 are filled, received, or disposed in the second cavity CA2, and the second liquid LQ21 having conductivity (hereinafter referred to as '2-1 liquid') and non-conductive. It may include a second liquid (LQ22) having (hereinafter referred to as '2-2 liquid'). The 2-1 liquid (LQ21) and the 2-2 liquid (LQ22) do not mix with each other, and the second interface (BO20, BO21) is in contact with the portion between the 2-1 and 2-2 liquids (LQ21, LQ22). It can be formed. For example, the 2-1 liquid LQ21 may be disposed on the 2-2 liquid LQ22, but the embodiment is not limited thereto.

The second inner surface i2 of the first lower plate P1L may define a side portion of the second cavity CA2. At this time, the second inner surface i2 of the first lower plate P1L may be inclined as illustrated in FIG. 1, but the embodiment is not limited thereto.

The second cavity CA2 may include third and fourth openings O3 and O4. The third opening O3 is located on the other side (eg, a lower surface) of the first lower plate P1L, and may define a lower portion of the second cavity CA2. The fourth opening O4 is located on one side (eg, an upper surface) of the first lower plate P1L and may define an upper portion of the second cavity CA2. That is, the second cavity CA2 may be defined as a region surrounded by the second inner surface i1, the third opening O3, and the fourth opening O4 of the first lower plate P1L. The second cavity CA2 may be disposed to overlap the first cavity CA1 on the optical axis LX.

The third opening O3 and the fourth opening O4 may overlap the optical axis LX, and the fourth opening O4 may face the second opening O2.

The diameter of the wider opening among the third and fourth openings O3 and O4 is the optical device 200 to be described later including the field of view (FOV) or the second lens unit 120 required by the second lens unit 120 It may vary depending on the role to be played. According to an embodiment, the size (or area or width) of the third opening O3 may be smaller than the size (or area or width) of the fourth opening O4. Here, the size of each of the third and fourth openings O3 and O4 may be a cross-sectional area in a horizontal direction (eg, x-axis and y-axis directions). For example, the size of each of the third and fourth openings O3 and O4 may mean a radius when the cross section of the opening is circular, and may mean a length of a diagonal line when the cross section of the opening is square. Each of the third and fourth openings O3 and O4 may have a hole shape having a circular plane.

The second cavity CA2 is a portion through which light incident from the outside is transmitted. Therefore, the first lower plate P1L constituting the second cavity CA2 may be made of a transparent material, or may contain impurities so that light is not easily transmitted.

The light may be incident through the fourth opening O4 wider than the third opening O3 in the second cavity CA2, and may be emitted through the third opening O3, or the third narrower than the fourth opening O4 It may be incident through the opening O3 and exit through the fourth opening O4.

In addition, the sizes of the first opening O1 and the third opening O3 may be the same, and the sizes of the second opening O2 and the fourth opening O4 may be the same. Alternatively, the sizes of the first opening O1 and the third opening O3 may be different, and the sizes of the second opening O2 and the fourth opening O4 may be different.

In addition, the first cavity CA1 and the second cavity CA2 may have cross-sectional shapes that are symmetrical to each other based on a horizontal plane orthogonal to the optical axis LX (ie, a horizontal plane formed by the x-axis and the y-axis).

In general, when the lens unit performs the OIS function than when performing the AF function, a wave front error (WFE) may occur more. If the light is incident on the first lens unit 110 and proceeds to the second lens unit 120 and the first cavity CA1 and the second cavity CA2 are symmetric to each other, the first lens unit 110 The wavefront error (WFE) caused by may be canceled in the second lens unit 120.

Hereinafter, after light is incident through the first opening O1, it is emitted from the first lens unit 110 through the second opening O2, and after being incident through the fourth opening O4, the third opening O3 It is described as being emitted from the second lens unit 120 through ), but after light is incident through the third opening O3, it is emitted from the second lens unit 120 through the fourth opening O4. The above-described description and the following description may also be applied when incident from the first lens unit 110 through the first opening O1 after being incident through the two openings O2.

In addition, the second lower plate P2L is disposed on one side (for example, the upper side) of the first lower plate P1L where the fourth opening O4 is located, and the third lower plate P3L is the third opening ( O3) may be disposed on the other side (eg, below) of the first lower plate P1L. That is, the second lower plate P2L may be disposed on the lower common electrode CEL and the second cavity CA2, and the third lower plate P3L may include a plurality of lower individual electrodes LLL and the second cavity. (CA2).

The second lower plate P2L and the third lower plate P3L may be disposed to face each other with the first lower plate P1L interposed therebetween. Also, at least one of the second lower plate P2L or the third lower plate P3L may be omitted.

At least one of the second or third lower plates P2L and P3L may have a rectangular planar shape. Each of the second and third lower plates P2L and P3L is a region through which light passes, and may be made of a light-transmissive material. For example, each of the second and third lower plates P2L and P3L may be made of glass, and may be formed of the same material for convenience of processing.

The second lower plate P2L may have a configuration that allows the incident light to proceed into the second cavity CA2 of the first lower plate P1L. The third lower plate P3L may have a configuration that allows light passing through the second cavity CA2 of the first lower plate P1L to be emitted. The second lower plate P2L may directly contact the 2-1 liquid LQ21.

Also, the actual effective lens area of the second lens unit 120 may be narrower than the diameter of the wide fourth opening O4 among the third and fourth openings O3 and O4 of the first lower plate P1L.

The lower common electrode CEL is disposed on one side of the first lower plate P1L (eg, above the first lower plate P1L), and the other side of the first lower plate P1L (eg, the first A plurality of lower individual electrodes LLL may be disposed on the lower plate P1L). The lower common electrode CEL may be disposed to be spaced apart from the plurality of lower individual electrodes LLL in at least a portion of one side (eg, an upper surface) of the first lower plate P1L. A portion of the lower common electrode CEL disposed on one side of the first lower plate P1L is exposed to the conductive 2-1 liquid LQ21 to be electrically connected to the 2-1 liquid LQ21. The plurality of lower individual electrodes LLL may be disposed only on the other side (for example, the lower surface) of the first lower plate P1L, and extend to the second inner surface i2 of the first lower plate P1L. It may be disposed, or may be further extended to one side (eg, an upper surface) of the first lower plate P1L while being spaced apart from the lower common electrode CEL.

The lower common electrode CEL is one electrode, and the number of lower individual electrodes LLL may be two or more, for example, four or eight.

Each of the first lens unit 110 and the second lens unit 120 may perform an image stabilization or an image stabilization (OIS) function. To this end, the number of upper individual electrodes LLU is also plural, and the number of lower individual electrodes LLL is plural.

For example, the plurality of lower individual electrodes LLL may be sequentially arranged along the optical axis LX in the clockwise direction (or counterclockwise direction).

Each of the lower common electrode CEL and the plurality of lower individual electrodes LLL may be made of a conductive material.

Meanwhile, the lower insulating layer 148L may be disposed while covering a part of the upper surface of the third lower plate P3L in the lower region of the second cavity CA2. That is, the lower insulating layer 148L may be disposed between the 2-2 liquid LQ22 and the third lower plate P3L.

In addition, the lower insulating layer 148L may be disposed while covering a plurality of lower individual electrodes LLL. If a plurality of lower individual electrodes LLL are disposed to extend to the second inner surface i2 of the first lower plate P1L, the lower insulating layer 148L is disposed on the second inner surface i2. It may be disposed while covering the lower individual electrode (LLL). In addition, when the lower individual electrode LLL is spaced apart from the lower common electrode CEL and is further extended to the upper surface of the first lower plate P1L, the lower insulating layer 148L is the lower common electrode CEL. A portion and a plurality of lower individual electrodes LLL may be disposed while covering the entirety.

As such, the lower insulating layer 148L contacts between the plurality of lower individual electrodes LLL and the 2-1 liquid LQ21, and contacts between the plurality of lower individual electrodes LLL and the 2-2 liquid LQ22, and Contact between the third lower plate P3L and the 2-2 liquid LQ22 may be blocked.

The lower insulating layer 148L covers one electrode (eg, a plurality of lower individual electrodes LLL) of the lower common electrode CEL and a plurality of lower individual electrodes LLL, and the other electrode (eg, For example, a portion of the lower common electrode CEL may be exposed to allow electric energy to be applied to the 2-1 liquid LQ21 having conductivity.

Meanwhile, the first lens unit 110 according to the embodiment may further include a first upper connection substrate 141U and a second upper connection substrate 144U.

The first upper connection substrate 141U may be electrically connected to an electrode pad formed on a main substrate (not shown) through a connection pad electrically connected to a plurality of upper individual electrodes LLU. The second upper connection substrate 144U may be electrically connected to the electrode pad formed on the main substrate through a connection pad electrically connected to the upper common electrode CEU.

In addition, the second lens unit 120 may further include a first lower connection substrate 141L and a second lower connection substrate 144L.

The first lower connection substrate 141L may be electrically connected to an electrode pad formed on the main substrate through a connection pad electrically connected to a plurality of lower individual electrodes LLL. The second lower connection substrate 144L may be electrically connected to the electrode pad formed on the main substrate through a connection pad electrically connected to the lower common electrode CEL.

For example, each of the second upper and second

lower connection substrates

144U, 144L is implemented as an FPCB or a single metal substrate (conductive metal plate), and each of the first upper and first

lower connection substrates

141U, 141L is It may be implemented as a flexible printed circuit board (FPCB), but embodiments are not limited thereto.

The second upper connection substrate 144U may transmit one driving voltage (hereinafter referred to as “common voltage”) to the first lens unit 110, and the first upper connection substrate 141U may drive a plurality of different driving voltages. The voltage (hereinafter referred to as “individual voltage”) may be transmitted to the first lens unit 110. The common voltage may include a DC voltage or an AC voltage, and when the common voltage is applied in the form of a pulse, the width or duty cycle of the pulse may be constant. The plurality of individual voltages supplied through the first upper connection substrate 141U may be applied to the plurality of upper individual electrodes LLU exposed at each corner of the first lens unit 110. That is, a voltage may be supplied to the first lens unit 110 through the first upper connection substrate 141U and the second upper connection substrate 144U.

The second lower connection substrate 144L may transmit one common voltage to the second lens unit 120, and the first lower connection substrate 141L may transmit a plurality of different individual voltages to the second lens unit 120. Can deliver. The plurality of individual voltages supplied through the first lower connection substrate 141L may be applied to the plurality of lower individual electrodes LLL exposed at the corners of the second lens unit 120. That is, a voltage may be supplied to the second lens unit 120 through the first lower connection substrate 141L and the second lower connection substrate 144L.

The first interface BO10 formed in the first lens unit 110 in response to the driving voltage may be 0 diopters, or the tilting angle of the first interface BO11 is changed from 0 diopters, thereby eliminating the An optical device including one lens unit 110 may perform an OIS function.

The second interface BO20 formed in the second lens unit 120 in response to the driving voltage may be 0 diopters, or the tilting angle of the second interface BO21 is changed from 0 diopters, thereby eliminating the 2 The optical device including the lens unit 120 may perform an OIS function.

2 is a sectional view of a lens module 100B according to another embodiment.

In the case of the lens module 100A according to an embodiment shown in FIG. 1, the second upper plate P2U and the second lower plate P2L are parallel to the optical axis LX with an air spacer interposed therebetween. It may be arranged spaced apart from each other by a predetermined distance (d) in the direction (for example, the z-axis direction).

However, in the case of the lens module 100B according to another embodiment illustrated in FIG. 2, the second upper plate P2U and the second lower plate P2L are integral. That is, the second plate P2 illustrated in FIG. 2 corresponds to the integrated second upper plate P2U and the second lower plate P2L. In this case, the second upper connection substrate 144U and the second lower connection substrate 144L may also be integral. That is, the second connection substrate 144 illustrated in FIG. 2 corresponds to the integrated second upper connection substrate 144U and the second lower connection substrate 144L.

As described above, since the second upper plate P2U and the second lower plate P2L are integrated, the overall size of the lens module 100B shown in FIG. 2 is reduced than the lens module 100A shown in FIG. 1. Can.

Except for the above-mentioned differences, the lens module 100B illustrated in FIG. 2 is the same as the lens module 100A illustrated in FIG. 1, and thus the same reference numerals are used, and duplicate descriptions are omitted.

In the case of the

lens modules

100A and 100B according to the above-described embodiment, since the plurality of

lens units

110 and 120 performing the OIS function are aligned with the optical axis LX, even if the degree of shaking or hand shaking is large, it is compensated for. Can have improved OIS performance. That is, the first interface BO10 and the second interface BO20 are tilted in the same direction as shown in FIG. 1 (BO11, BO21), thereby compensating for this even when the degree of shaking or shaking is large.

For example, if the optical device including the

lens modules

100A and 100B is shaken or shaken by 1°, the interface BO between the two liquids in one lens unit should be tilted by 10° to compensate for this. However, it is difficult to tilt the interface BO between two liquids in one lens unit by about 10°. However, in the case of the

lens modules

100A and 100B according to the embodiment, since the plurality of

lens units

110 and 120 performing the OIS function are aligned with the optical axis LX, the interface of each lens unit 110 and 120 ( BO10, BO20) When each is tilted about 5°, the entire tilt is 10°, so the

lens modules

100A and 100B can compensate for the degree of shaking or shaking of the optical device by 1°.

In the case of the

lens modules

100A and 100B according to the above-described embodiment, the plurality of

lens units

110 and 120 performing the OIS function are aligned with the optical axis LX to cooperate with each other, so that they react more than when using one lens unit. Speed can be improved.

The

lens modules

100A and 100B according to the above-described embodiment may be applied to various fields.

Hereinafter, the optical device 200 according to the embodiment will be described with reference to the accompanying drawings, but the optical device 200 according to the embodiment is not limited thereto.

3 shows a schematic block diagram of an optical device 200 according to an embodiment.

The optical device 200 may include a prism unit 210, a lens module 220, a camera actuator 230, and an image sensor 240. Here, the lens module 220 may correspond to any one of the

lens modules

100A and 100B shown in FIGS. 1 and 2 described above.

The prism unit 210 serves to change the path of light incident in the direction indicated by IN in the direction of the optical axis LX of the lens module 220.

The lens module 220 enters the light whose optical path is changed from the prism unit 210 and performs the OIS function as described above, and outputs it to the camera actuator 230. That is, the lens module 220 may correct the shaking or shaking of the optical device 200 in a direction perpendicular to the optical axis LX (eg, x-axis and y-axis directions). For example, when the camera shake is generated in the +x axis direction, the lens module 220 corrects the optical path to L1, and when the camera shake is generated in the -x axis direction, the lens module 220 can correct the optical path to L2. have. As described above, the paths L1 and L2 of light emitted from the lens module 220 may be changed according to the direction in which the shaking or shaking occurs.

The camera actuator 230 may perform a zooming function and an AF function on the light emitted from the lens module 220. Here, the zooming function may mean a function of zooming in or zooming out by increasing or decreasing the magnification of a distant subject.

4 shows a block diagram according to an embodiment 230A of the camera actuator 230 shown in FIG. 3.

The camera actuator 230A may include an optical system and a lens driver. The optical system includes first to

third lens assemblies

232, 234, and 236, and a guiding unit 238, and the lens driving unit may include a coil driving unit (not shown) and a magnet driving unit (not shown).

The AF function and the high magnification zooming function may be performed by driving the optical system through the coil driving unit and the magnet driving unit in the camera actuator 230A.

For example, the first lens assembly 232 may include at least one fixed lens. The second lens assembly 234 and the third lens assembly 236 may be moving lenses moving in the direction of the optical axis LX through the coil driving unit, the magnet driving unit, and the guiding unit 238.

For example, the second lens assembly 234 and the third lens assembly 236 may be driven by electromagnetic force by the interaction between the coil driving unit and the magnet driving unit, and through this, the camera actuator 230A defocuss the lens when zooming. It can solve the problem of (decenter) or tilt. Accordingly, alignment between the plurality of lens groups is well aligned to prevent a change in the angle of view or out-of-focus, so that the image quality or resolution can be significantly improved.

Referring to FIG. 3 again, the image sensor 240 may perform a function of converting light emitted from the camera actuator 230 into image data. More specifically, the image sensor 240 may convert light into an analog signal through a pixel array including a plurality of pixels, and synthesize digital signals corresponding to the analog signals to generate image data.

Although only a few are described as described above in connection with the embodiments, various forms of implementation are possible. The technical contents of the above-described embodiments may be combined in various forms, unless the technologies are incompatible with each other, and may be implemented as a new embodiment.

Meanwhile, an optical device according to another embodiment may be implemented using a camera module including a lens assembly having

lens modules

100A and 100B. Here, the optical device may include a device capable of processing or analyzing an optical signal. Examples of the optical device may include a camera/video device, a telescope device, a microscope device, an interferometer device, a photometer device, a polarimeter device, a spectrometer device, a reflectometer device, an autocollimator device, a lens meter device, and the like, and a

lens module

100A, 100B), the present embodiment may be applied to an optical device that may include a lens assembly.

Also, the optical device may be implemented as a portable device such as a smart phone, a notebook computer, and a tablet computer. The optical device includes a camera module having

lens modules

100A and 100B, a display unit (not shown) that outputs an image, a battery (not shown) that supplies power to the camera module, and a camera module, a display unit, and a battery. It may include a body housing. The optical device may further include a communication module capable of communicating with other devices and a memory unit capable of storing data. The communication module and the memory unit may also be mounted in the body housing.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential features of the present invention. Accordingly, the above detailed description should not be construed as limiting in all respects, but should be considered illustrative. The scope of the invention should be determined by rational interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Modes for carrying out the invention have been fully explained in the above-described "Best Mode for Invention".

The lens module according to the embodiment and the optical device including the module include a camera/video device, a telescope device, a microscope device, an interferometer device, a photometer device, a polarimeter device, a spectrometer device, a reflectometer device, an autocollimator device, a lens meter device, It can be used in smartphones, notebook computers, tablet computers, and the like.

Claims

A first lens unit having a first cavity; And

And a second lens unit having a second cavity disposed on the optical axis overlapping with the first cavity,

The first cavity

A first opening; And

The second opening overlaps the optical axis, and includes a second opening larger than the first opening,

The second cavity

A third opening; And

A lens module overlapping the third opening with the optical axis and facing the second opening, the fourth opening being larger than the third opening.
According to claim 1,

The first lens unit

First liquids filled, received, or disposed in the first cavity;

A first upper plate having an inner surface defining a side portion of the first cavity;

A second upper plate disposed on one side of the first upper plate on which the second opening is located; And

And a third upper plate disposed on the other side of the first upper plate in which the first opening is located,

The second lens unit

Second liquids filled, received, or disposed in the second cavity;

A first lower plate having an inner surface defining a side portion of the second cavity;

A second lower plate disposed on one side of the first lower plate on which the fourth opening is located; And

A lens module including a third lower plate disposed on the other side of the first lower plate on which the third opening is located.
According to claim 1,

The sizes of the first opening and the third opening are the same,

The size of the second opening and the fourth opening is the same lens module.
According to claim 1,

The first opening and the third opening have different sizes,

Lens modules having different sizes of the second opening and the fourth opening.
The lens module of claim 1, wherein the first cavity and the second cavity have cross-sectional shapes that are symmetrical to each other based on a horizontal plane orthogonal to the optical axis.
The lens module of claim 2, wherein the second upper plate and the second lower plate are spaced apart from each other in a direction parallel to the optical axis with an air spacer therebetween.
The lens module of claim 2, wherein the second upper plate and the second lower plate are integral.
According to claim 2,

The first lens unit

An upper common electrode disposed on the one side of the first upper plate; And

And a plurality of upper individual electrodes disposed on the other side of the first upper plate,

The second lens unit

A lower common electrode disposed on the one side of the first lower plate; And

A lens module including a plurality of lower individual electrodes disposed on the other side of the first lower plate.
The method of claim 8,

The first lens unit

A first upper connecting substrate electrically connected to the plurality of upper individual electrodes; And

And a second upper connection substrate electrically connected to the upper common electrode,

The second lens unit

A first lower connection substrate electrically connected to the plurality of lower individual electrodes; And

A second lower connection substrate electrically connected to the lower common electrode,

The second upper connecting board and the second lower connecting board are integral lens modules.
The lens module according to any one of claims 1 to 9;

A prism that changes a path of light incident from the outside in the optical axis direction of the lens module;

A camera actuator that performs a zooming function and an AF function on the light passing through the lens module; And

And an image sensor that generates image data from light emitted from the camera actuator.