Composite polymer and camera module composed of composite polymer

Abstract

A composite polymer according to the present embodiment includes an ester-based resin, wherein the ester-based resin includes a first repeating unit including one aromatic ring and an ester group and a second repeating unit including two to six (both inclusive) aromatic rings and ester groups, with the ratio of the weight of a first part composed of the first repeating unit to the weight of a second part composed of the second repeating unit in the ester-based resin being 1: 2 to 1: 6.

Description

A camera module composed of a composite polymer and a composite polymer

[0001] This embodiment relates to a composite polymer and a camera module composed of the composite polymer.

[0002] A composite polymer refers to a polymer material composed of a combination of two or more materials. A composite polymer includes a matrix and a filler or reinforcement.

[0003] The matrix is ​​a resin that forms the basic structure of the composite polymer, and thermoplastic and thermosetting resins may be used. Examples of thermoplastic resins that may be used include polycarbonate (PC), polypropylene (PP), polyamide (PA), and polyester (PET, PBT). Examples of thermosetting resins that may be used include epoxy resin, unsaturated polyester resin, and polyurethane resin. The selection of the matrix is ​​determined by the environment and purpose in which the composite polymer will be used, and is optimized by considering the interaction with fillers and reinforcing materials.

[0004] In composite polymers, fillers are dispersed within the matrix and play a role in improving properties such as strength, hardness, durability, thermal stability, and electrical or thermal conductivity.

[0005] Composite polymers possess excellent mechanical strength, heat resistance, chemical resistance, and processability, making them suitable for use as components in precision electronic devices such as camera modules.

[0006] As camera modules are components requiring high precision and durability, the parts included in the camera module must be composed of materials that exhibit minimal shrinkage and warping, and possess sufficient dent resistance and hardness.

[0007] The present embodiment aims to provide a filler to be included in a composite polymer for constituting at least one component of a camera module, a composite polymer including the filler, and a camera module composed of the composite polymer. Additionally, the present embodiment aims to provide a composite polymer including an ester-based resin as a matrix and a camera module composed of the composite polymer.

[0008] The composite polymer according to the present embodiment comprises an ester resin, wherein the ester resin comprises a first repeating unit comprising one aromatic ring and an ester group and a second repeating unit comprising two or more and six or fewer aromatic rings and ester groups, and the ratio of the weight of the first part composed of the first repeating unit and the weight of the second part composed of the second repeating unit in the ester resin may be 1:2 to 1:6.

[0009] FT-IR analysis results for the composite polymer according to the present embodiment, 1400 cm⁻¹ - ¹ and 1500 cm - Two peaks are identified between ¹, and the peak value of the first peak having a higher wavenumber among the two peaks may be 0.85 times or more of the peak value of the second peak having a lower wavenumber among the two peaks.

[0010] The peak value of the first peak above may be at least 1 times the peak value of the second peak above.

[0011] The peak value of the first peak above may be at least twice the peak value of the second peak above.

[0012] The second repeating unit comprises three aromatic rings, and in the FT-IR analysis results for the ester resin or the composite polymer, at least one peak corresponding to three aromatic rings is higher than the peak corresponding to one aromatic ring, respectively; or the second repeating unit comprises four aromatic rings, and in the FT-IR analysis results for the ester resin or the composite polymer, at least one peak corresponding to four aromatic rings is higher than the peak corresponding to one aromatic ring, respectively; or the second repeating unit comprises five aromatic rings, and in the FT-IR analysis results for the ester resin or the composite polymer, at least one peak corresponding to five aromatic rings is higher than the peak corresponding to one aromatic ring, respectively; or the second repeating unit comprises six aromatic rings, and in the FT-IR analysis results for the ester resin or the composite polymer, at least one peak corresponding to six aromatic rings is higher than the peak corresponding to one aromatic ring, respectively. The peaks can be higher in each case.

[0013] The second repeating unit includes two aromatic rings, and in the Pyro-GC / MS (Pyrolysis-Gas Chromatography / Mass Spectrometry) analysis results for the ester resin or the composite polymer, the fourth peak corresponding to two aromatic rings may be higher than the third peak corresponding to one aromatic ring.

[0014] The second repeating unit includes three aromatic rings, and in the Pyro-GC / MS analysis results for the ester resin or the composite polymer, the fourth peak corresponding to three aromatic rings may be higher than the third peak corresponding to one aromatic ring.

[0015] The second repeating unit includes four aromatic rings, and in the Pyro-GC / MS analysis results for the ester resin or the composite polymer, the fourth peak corresponding to four aromatic rings may be higher than the third peak corresponding to one aromatic ring.

[0016] The second repeating unit includes five aromatic rings, and in the Pyro-GC / MS analysis results for the ester resin or the composite polymer, the fourth peak corresponding to five aromatic rings may be higher than the third peak corresponding to one aromatic ring.

[0017] The second repeating unit includes six aromatic rings, and in the Pyro-GC / MS analysis results for the ester resin or the composite polymer, the fourth peak corresponding to six aromatic rings may be higher than the third peak corresponding to one aromatic ring.

[0018] The weight ratio of the first part to the weight of the ester-based resin is 15 wt% or more and 30 wt% or less, the weight ratio of the second part to the weight of the ester-based resin is 70 wt% or more and 85 wt% or less, and the sum of the weight ratio of the first part and the weight ratio of the second part to the weight of the ester-based resin may be 100 wt%.

[0019] The weight ratio of the first part to the weight of the composite polymer may be 9 wt% or more and 18 wt% or less, and the weight ratio of the second part to the weight of the composite polymer may be 42 wt% or more and 51 wt% or less.

[0020] The composite polymer according to the present embodiment may include a filler comprising a first mineral composed of crystals including barium and calcium.

[0021] The above first mineral may have a hexagonal crystal structure.

[0022] The crystal of the first mineral above may further include silicon and oxygen.

[0023] The molecular formula of the first mineral mentioned above is Ba x Ca (2-x) It is SiO4, and x can be greater than 0 and less than 2.

[0024] The above filler may further include at least one of a second mineral having BaSiO as the unit crystal, a third mineral having CaSiO as the unit crystal, and a fourth mineral having BaSO4 as the unit crystal.

[0025] The above-mentioned fourth mineral may have an orthorhombic crystal structure.

[0026] The weight ratio of the filler to the weight of the composite polymer may be 5 wt% or more and 70 wt% or less.

[0027] The weight ratio of the filler to the weight of the composite polymer may be 40 wt% or more and 50 wt% or less.

[0028] A camera module according to the present embodiment comprises a base, a carrier disposed on the base, and a ball bearing, and at least a portion of at least one of the base and the carrier may be composed of a composite polymer according to the present embodiment.

[0029] The above carrier includes an AF carrier and an OIS carrier disposed within the AF carrier, and at least a portion of at least one of the AF carrier and the OIS carrier may be composed of a composite polymer according to the present embodiment.

[0030] The composite polymer according to the present embodiment has excellent indentation resistance and strength due to enhanced intercrystalline bonding. In addition, the composite polymer according to the present embodiment exhibits minimal shrinkage and warping after injection molding.

[0031] FIG. 1 illustrates an exemplary structure of a mineral included in a filler according to the present embodiment.

[0032] FIG. 2 illustrates thermogravimetric analysis data for determining the weight ratio of the filler to the weight of the composite polymer according to the present embodiment.

[0033] Figure 3 illustrates the chemical structure of an ester-based resin included in a composite polymer according to the present embodiment.

[0034] FIG. 4 illustrates an example of an aromatic ring included in a repeating unit constituting an ester-based resin included in a composite polymer according to the present embodiment.

[0035] Figure 5 shows the FT-IR (Fourier Transform Infrared Spectroscopy) analysis results for the composite polymer according to the comparative example and the composite polymer according to the present embodiment.

[0036] Figure 6 shows the Pyro-GC / MS (Pyrolysis-Gas Chromatography / Mass Spectrometry) analysis results for a composite polymer according to a comparative example and a composite polymer according to the present embodiment.

[0037] FIG. 7 is a perspective view of a camera module according to the present embodiment.

[0038] FIG. 8 is an exploded perspective view of a camera module according to the present embodiment.

[0039] FIG. 9 is a perspective view of a base according to the present embodiment.

[0040] FIG. 10 is a perspective view of an AF carrier according to the present embodiment.

[0041] Figure 11 is a cross-sectional view taken along line A-A' of Figure 7.

[0042] FIG. 12 illustrates a magnetic levitation operation according to the present embodiment.

[0043] FIG. 13 is a cross-sectional view of a camera module according to the present embodiment.

[0044] Figure 14 is an enlarged view of areas A and B of Figure 7.

[0045] FIG. 15 is a cross-sectional view of a camera module according to another embodiment of the present invention.

[0046] FIG. 16 is a cross-sectional view of a camera module according to another embodiment of the present invention.

[0047] Figure 17 is a cross-sectional view of Figure 10 seen from a different angle.

[0048] FIG. 18 is a cross-sectional view of a camera module according to another embodiment of the present invention.

[0049] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0050] However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted.

[0051] In addition, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology.

[0052] Furthermore, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention.

[0053] In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as "at least one of A and B and C (or more than one)," it may include one or more of all combinations that can be formed from A, B, and C.

[0054] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are used merely to distinguish the components from other components and are not intended to limit the essence, order, or sequence of the components.

[0055] And, where it is stated that a component is 'connected', 'combined', or 'connected' to another component, this may include not only cases where the component is directly 'connected', 'combined', or 'connected' to the other component, but also cases where it is 'connected', 'combined', or 'connected' due to another component located between the component and the other component.

[0056] According to the present embodiment, a filler to be included in a composite polymer may include a first mineral composed of crystals containing barium and calcium. FIG. 1 illustrates the structure of the first mineral. As shown in FIG. 1, the first mineral may be composed of crystals containing barium and calcium. The first mineral may have a hexagonal crystal structure. The crystals of the first mineral may further contain silicon and oxygen. The molecular formula of the first mineral is Ba x Ca (2-x) It can be expressed as SiO4, where x can be any number greater than 0 and less than 2.

[0057] According to one embodiment, the filler may further include a second mineral having BaSiO as the unit crystal. According to one embodiment, the filler may further include a third mineral having CaSiO as the unit crystal. According to one embodiment, the filler may further include a fourth mineral having BaSO4 as the unit crystal. The fourth mineral may have an orthorhombic crystal structure. According to one embodiment, the filler may further include at least one of the second mineral, the third mineral, and the fourth mineral.

[0058] According to the present embodiment, the composite polymer may include the filler and ester-based resin described above.

[0059] FIG. 2 illustrates thermogravimetric analysis data for determining the weight ratio of the filler to the weight of the composite polymer according to the present embodiment. In section A, the composite polymer sample is placed under N2 gas conditions and the temperature is raised to 800°C at a rate of 10°C per minute. In section B, the N2 gas conditions and the temperature conditions of 800°C are maintained for 1 hour. In section C, the composite polymer sample is placed under O2 gas conditions while maintaining the temperature conditions of 800°C for 1 hour. After section C, the temperature is lowered at a constant rate, for example, at a rate of 10°C per minute. Since the matrix contained in the composite polymer undergoes thermal decomposition in sections A to C, the value obtained by dividing the sample mass after the end of section C by the sample mass at the start of section A can be determined as the weight ratio of the filler to the weight of the composite polymer.

[0060] Alternatively, to determine the weight ratio of the filler to the weight of the composite polymer, methods other than thermogravimetric analysis may be used. After exposing the composite polymer sample to HFIP (1,1,1,3,3,3-Hexafluoro-2-propanol), which can decompose the matrix, for more than 10 hours, only the undecomposed filler can be filtered out using a filter. The weight of the filtered filler divided by the weight of the composite polymer sample before exposure to HFIP can be determined as the weight ratio of the filler to the weight of the composite polymer.

[0061] In one embodiment, the weight ratio of the filler to the weight of the composite polymer may be 5 wt% or more and 70 wt% or less. If the weight ratio of the filler to the weight of the composite polymer is less than 5 wt%, transverse shrinkage is not suppressed. If the weight ratio of the filler to the weight of the composite polymer exceeds 70 wt%, filler particles may protrude above the surface of the composite polymer.

[0062] In one embodiment, the weight ratio of the filler to the weight of the composite polymer may be 40 wt% or more and 50 wt% or less. When the weight ratio of the filler to the weight of the composite polymer is less than 40 wt%, the transverse shrinkage is significantly higher compared to when the weight ratio is 40 wt%. When the weight ratio of the filler to the weight of the composite polymer exceeds 50 wt%, filler particles may protrude above the surface of the composite polymer when impact is applied to the composite polymer.

[0063] The composite polymer according to the present embodiment may include a filler and an ester-based resin. FIG. 3 illustrates the chemical structure of an ester-based resin included in the composite polymer according to the present embodiment. FIG. 4 illustrates an example of an aromatic ring included in a repeating unit constituting the ester-based resin included in the composite polymer according to the present embodiment.

[0064] Referring to FIG. 3, the ester resin included as a matrix in the composite polymer according to the present embodiment may include a first monomer and a second monomer. The ester resin included as a matrix in the composite polymer according to the present embodiment may be composed of a first monomer and a second monomer. The first monomer and the second monomer are repeating units within the ester resin. The first monomer may include one aromatic ring and an ester group as shown in FIG. 4 (a). The second monomer may include two aromatic rings and an ester group as shown in FIG. 4 (b). Although FIG. 3 illustrates an example in which the second monomer includes two aromatic rings, the number of aromatic rings included in the second monomer may vary depending on various embodiments. As shown in FIG. 4(c), the second monomer may include three aromatic rings, four aromatic rings, five aromatic rings, or six aromatic rings.

[0065] Referring to FIG. 3, the number of times the first monomer and the second monomer are repeated may differ. FIG. 3 illustrates an example in which one polymer formed by polymerizing X number of first monomers and one polymer formed by polymerizing Y number of second monomers are combined, but the matrix of the composite polymer according to the present embodiment is not limited thereto. For example, one end of a second polymer formed by polymerizing a plurality of second monomers may be combined with a first polymer formed by polymerizing a plurality of first monomers, and a third polymer formed by polymerizing a plurality of first monomers may be combined with the other end of the second polymer to constitute at least a part of the matrix of the composite polymer. Similarly, one end of a second polymer formed by polymerizing a plurality of first monomers may be combined with a first polymer formed by polymerizing a plurality of second monomers, and a third polymer formed by polymerizing a plurality of second monomers may be combined with the other end of the second polymer to constitute at least a part of the matrix of the composite polymer.

[0066] A first portion composed of the first monomer can be defined in the matrix of the composite polymer, whether the first monomer is polymerized continuously in the matrix of the composite polymer or the polymer of the second monomer is bonded within the chain of the first monomer. The first portion is not necessarily formed continuously, and a set of discontinuously distributed portions composed of the first monomer within the matrix can be defined as the first portion. Similarly, a set of one or more continuously or discontinuously distributed portions composed of the second monomer within the matrix can be defined as the second portion.

[0067] In the ester-based resin of the composite polymer according to the present embodiment, the ratio of the weight of the first part composed of the first monomer to the weight of the second part composed of the second monomer may be 1:2 to 1:6, which is a numerical range including 1:2 and 1:6. When the ratio of the weight of the first part to the weight of the second part is less than 1:2, the number of pi-pi stacking interactions between aromatic rings is low, resulting in low indentation resistance and strength. When the ratio of the weight of the first part to the weight of the second part is less than 1:2, the indentation resistance and strength appear significantly lower compared to the case where the ratio of the weight of the first part to the weight of the second part is 1:2. When the ratio of the weight of the first part to the weight of the second part exceeds 1:6, the number of pi-pi stacking interactions between aromatic rings is excessive, resulting in excessively high viscosity, and consequently, the injection of the composite polymer containing the ester-based resin cannot be performed smoothly. When the ratio of the weight of the first part to the weight of the second part exceeds 1:6, the viscosity of the composite polymer containing the ester resin is significantly higher compared to when the ratio of the weight of the first part to the weight of the second part is 1:6.

[0068] The weight ratio of the first part to the weight of the ester-based resin of the composite polymer according to the present embodiment is 15 wt% or more and 30 wt% or less, the weight ratio of the second part to the weight of the ester-based resin is 70 wt% or more and 85 wt% or less, and the sum of the weight ratio of the first part and the weight ratio of the second part to the weight of the ester-based resin may be 100 wt%.

[0069] The weight ratio of the first part to the weight of the composite polymer according to the present embodiment may be 9 wt% or more and 18 wt% or less, and the weight ratio of the second part to the weight of the composite polymer may be 42 wt% or more and 51 wt% or less.

[0070] FIG. 5 illustrates the Fourier Transform Infrared Spectroscopy (FT-IR) analysis results for the composite polymer according to the comparative example and the composite polymer according to the present embodiment. For example, a Nicolet iN FTIR Spectrometer from Thermofisher may be used as the equipment for FT-IR analysis. The frequency range is 7,600 cm⁻¹. -1 ~ 450 cm -1 , the resolution is 0.09 cm -1 Less than, wavelength precision is 0.01 cm -1 Analysis can be performed. In the graph of Fig. 5, the x-axis represents the wavenumber, which indicates the reciprocal of the wavelength of infrared light. In the graph of Fig. 5, the y-axis represents absorbance, which is an indicator of how much infrared light of a specific wavenumber the sample has absorbed. Graph (a) of Fig. 5 is the FT-IR analysis result of the E525T polymer, which is the comparison group, and graph (b) is the FT-IR analysis result of the composite polymer according to the present embodiment, that is, the composite polymer containing the ester-based resin described above with reference to Figs. 3 and 4 as a matrix. The wavenumbers of the 5120 peak and the 5220 peak correspond to the naphthalene ring, i.e., two aromatic rings, and the wavenumbers of the 5110 peak and the 5210 peak correspond to the benzene ring, i.e., one aromatic ring.

[0071] Referring to graph (a) of Fig. 5, the analysis results of the comparative E525T polymer show that the 5120 peak corresponding to two aromatic rings is lower than the 5110 peak corresponding to one aromatic ring. This indicates that in the comparative E525T polymer, the number of monomers containing one aromatic ring is greater than the number of monomers containing two aromatic rings.

[0072] On the other hand, referring to graph (b) of FIG. 5, the analysis results of the composite polymer according to the present embodiment show that the 5220 peak corresponding to two aromatic rings is higher than the 5210 peak corresponding to one aromatic ring. This indicates that in the composite polymer according to the present embodiment, the number of monomers containing two aromatic rings is greater than the number of monomers containing one aromatic ring.

[0073] Although the analysis results of an example in which the second monomer contains two aromatic rings are illustrated in FIG. 5, the analysis results of a composite polymer according to various embodiments may also be similar to FIG. 5. That is, when the second monomer contains three aromatic rings, in the FT-IR analysis results for a matrix containing such a second monomer or a composite polymer containing such a matrix containing such a second monomer, the peak corresponding to three aromatic rings may be higher than the peak corresponding to one aromatic ring. Similarly, when the second monomer contains four aromatic rings, in the FT-IR analysis results for a matrix containing such a second monomer or a composite polymer containing such a matrix containing such a second monomer, the peak corresponding to four aromatic rings may be higher than the peak corresponding to one aromatic ring. Likewise, if the second monomer contains five aromatic rings, in the FT-IR analysis results for a matrix containing such second monomer or a composite polymer containing such second monomer, the peak corresponding to five aromatic rings may be higher than the peak corresponding to one aromatic ring. Likewise, if the second monomer contains six aromatic rings, in the FT-IR analysis results for a matrix containing such second monomer or a composite polymer containing such second monomer, the peak corresponding to six aromatic rings may be higher than the peak corresponding to one aromatic ring.

[0074] FIG. 6 illustrates the Pyro-GC / MS (Pyrolysis-Gas Chromatography / Mass Spectrometry) analysis results for a composite polymer according to a comparative example and a composite polymer according to the present embodiment. In FIG. 6, the x-axis represents the mass-to-charge ratio, and the y-axis represents the relative signal intensity, which is proportional to the number of detections of a specific chemical structure, i.e., the number of molecules. Graph (a) of FIG. 6 is the Pyro-GC / MS analysis result of the E525T polymer, which is the comparative group, and graph (b) is the Pyro-GC / MS analysis result of the composite polymer according to the present embodiment, that is, a composite polymer containing the ester-based resin described above with reference to FIG. 3 and FIG. 4 as a matrix. The mass-to-charge ratio of the 6110 and 6210 peaks corresponds to phenol, i.e., one aromatic ring, and the mass-to-charge ratio of the 6120 and 6220 peaks corresponds to 2-naphthalenol, i.e., two aromatic rings.

[0075] Referring to graph (a) of Fig. 6, the analysis results of the comparative E525T polymer show that the 6120 peak corresponding to two aromatic rings is lower than the 6110 peak corresponding to one aromatic ring. This indicates that in the comparative E525T polymer, the number of monomers containing one aromatic ring is greater than the number of monomers containing two aromatic rings.

[0076] On the other hand, referring to graph (b) of FIG. 6, the analysis results of the composite polymer according to the present embodiment show that the 6220 peak corresponding to two aromatic rings is higher than the 6210 peak corresponding to one aromatic ring. This indicates that in the composite polymer according to the present embodiment, the number of monomers containing two aromatic rings is greater than the number of monomers containing one aromatic ring. In graph (b) of FIG. 6, the ratio of the height of the 6210 peak to the height of the 6220 peak is approximately 1:5.

[0077] Although the analysis results of an example in which the second monomer contains two aromatic rings are illustrated in FIG. 6, the analysis results of a composite polymer according to various embodiments may also be similar to FIG. 6. That is, when the second monomer contains three aromatic rings, in the Pyro-GC / MS analysis results for a matrix containing such a second monomer or a composite polymer containing such a matrix containing such a second monomer, the peak corresponding to three aromatic rings may be higher than the peak corresponding to one aromatic ring. Similarly, when the second monomer contains four aromatic rings, in the Pyro-GC / MS analysis results for a matrix containing such a second monomer or a composite polymer containing such a matrix containing such a second monomer, the peak corresponding to four aromatic rings may be higher than the peak corresponding to one aromatic ring. Likewise, if the second monomer contains five aromatic rings, in the Pyro-GC / MS analysis results for a matrix containing such second monomer or a composite polymer containing such second monomer, the peak corresponding to five aromatic rings may be higher than the peak corresponding to one aromatic ring. Likewise, if the second monomer contains six aromatic rings, in the Pyro-GC / MS analysis results for a matrix containing such second monomer or a composite polymer containing such second monomer, the peak corresponding to six aromatic rings may be higher than the peak corresponding to one aromatic ring.

[0078] The results of the mechanical property evaluation of the composite polymer containing the filler described above with reference to FIGS. 1 and 2 and the matrix described above with reference to FIGS. 3 and 4 are as shown in Table 1.

[0079] Strength [HRD] Depression [㎛] Comparison Group 37.7 21.5 V 27 9.7 9.5 V 39 2.9 7.4

[0080] In Table 1, the comparative group is the E525T polymer. V2 is a composite polymer according to the present embodiment, comprising the filler described above with reference to FIGS. 1 and 2 and the matrix described above with reference to FIGS. 3 and 4, wherein the weight ratio of the filler to the weight of the composite polymer is 40 wt%. V3 is a composite polymer according to the present embodiment, comprising the filler described above with reference to FIGS. 1 and 2 and the matrix described above with reference to FIGS. 3 and 4, wherein the weight ratio of the filler to the weight of the composite polymer is 50 wt%. The depression in Table 1 refers to the depth of the depression formed on the sample after placing an indenter on a sample with a thickness of 0.5 mm and applying a load of 1.5 kgf. In Table 1, it is confirmed that V2 and V3 are improved compared to the comparative group in terms of strength and depression.

[0081] The results of evaluating the shrinkage rate of a composite polymer containing the filler described above with reference to FIGS. 1 and 2 and the matrix described above with reference to FIGS. 3 and 4 are as shown in Table 2.

[0082] x-axis change[%] ​​y-axis change[%] ​​z-axis change[%] ​​total[%] comparison group 0.0 3 0.0 3 0.3 5 0.4 1V 3 0.0 4 0.0 1 0.2 3 0.28

[0083] The evaluation of the shrinkage rate in Table 2 is performed by immersing a sample with a length of 15 mm in the x-axis direction, a length of 15 mm in the y-axis direction, and a thickness of 0.5 mm in the z-axis direction in water at 90 ℃ for 20 hours, and measuring the change in size of the sample before and after immersion. In Table 1, the comparison group is the E525T polymer. V3 is a composite polymer according to the present embodiment, comprising the filler described above with reference to FIGS. 1 and 2 and the matrix described above with reference to FIGS. 3 and 4, wherein the weight ratio of the filler to the weight of the composite polymer is 50 wt%. Referring to Table 2, it can be confirmed that the sum of the changes in size in the x-axis, y-axis, and z-axis directions is smaller in V3 compared to the comparison group, that is, V3 undergoes less shrinkage compared to the comparison group.

[0084] FIG. 7 is a perspective view of a camera module according to the present embodiment, FIG. 8 is an exploded perspective view of a camera module according to the present embodiment, FIG. 9 is a perspective view of a base according to the present embodiment, FIG. 10 is a perspective view of an AF carrier according to the present embodiment, FIG. 11 is a cross-sectional view taken along line A-A' of FIG. 7, FIG. 12 is a drawing for explaining magnetic levitation operation according to another embodiment of the present invention, FIG. 13 is a cross-sectional view of a camera module according to the present embodiment, FIG. 14 is an enlarged view of areas A and B of FIG. 13, FIG. 15 is a cross-sectional view of a camera module according to another embodiment of the present invention, FIG. 16 is a cross-sectional view of a camera module according to yet another embodiment of the present invention, FIG. 17 is a cross-sectional view taken from a different angle of FIG. 16, and FIG. 18 is a cross-sectional view of a camera module according to yet another embodiment of the present invention.

[0085] As used below, the 'Optical Axis Direction' is defined as the optical axis direction of the lens and / or image sensor coupled to the lens driving device.

[0086] As used below, the 'vertical direction' may be a direction parallel to or the same as the optical axis. The vertical direction may correspond to the 'z-axis direction'. As used below, the 'horizontal direction' may be a direction perpendicular to the vertical direction. That is, the horizontal direction may be a direction perpendicular to the optical axis. Therefore, the horizontal direction may include the 'x-axis direction' and the 'y-axis direction'.

[0087] As used below, the 'Auto Focus (AF) function' is defined as a function that automatically focuses on a subject by adjusting the distance to the image sensor through the movement of the lens along the optical axis according to the distance to the subject, so that a sharp image of the subject can be obtained on the image sensor. Additionally, 'Closed-loop Auto Focus (CLAF) control' is defined as real-time feedback control of the lens position by detecting the distance between the image sensor and the lens to improve the accuracy of focus adjustment.

[0088] The 'optical image stabilization (OIS) function' used below is defined as a function that moves or tilts the lens in a direction perpendicular to the optical axis to offset hand shake in order to prevent the image or video from shaking due to the user's hand shake. Additionally, 'closed-loop auto focus (CLAF) control' is defined as a function that detects the position of the lens relative to the image sensor and provides real-time feedback control of the lens position to improve the accuracy of image stabilization.

[0089] In the following, either "AF moving part" or "OIS moving part" may be referred to as "first moving part" and the other as "second moving part".

[0090] In the following, either the "AF drive unit" or the "OIS drive unit" may be referred to as the "first drive unit" and the other as the "second drive unit."

[0091] In the following, any one of the "AF drive unit," "OIS-x drive unit," and "OIS-y drive unit" may be referred to as the "first drive unit," the other as the "second drive unit," and the other as the "third drive unit."

[0092] In the following, one of "AF magnet (410)", "OIS-x magnet (510)" and "OIS-y magnet (610)" may be referred to as "first magnet", another as "second magnet", and the other as "third magnet".

[0093] In the following, one of the “AF coil (420)”, “OIS-x coil (520)”, and “OIS-y coil (620)” may be referred to as the “first coil”, another as the “second coil”, and the other as the “third coil”.

[0094] In the following, one of “AF magnet (410)”, “OIS-x magnet (510)”, “OIS-y magnet (610)”, “AF coil (420)”, “OIS-x coil (520)”, and “OIS-y coil (620)” may be referred to as the “first driving unit”, another as the “second driving unit”, another as the “third driving unit”, another as the “fourth driving unit”, another as the “fifth driving unit”, and another as the “sixth driving unit”.

[0095] In the following, one of the “AF sensor (430),” “OIS-x sensor (530)” and “OIS-y sensor (630)” may be referred to as the “first sensor,” the other as the “second sensor,” and the other as the “third sensor.”

[0096] And, where it is stated that a component is 'connected', 'combined', or 'connected' to another component, this may include not only cases where the component is directly 'connected', 'combined', or 'connected' to the other component, but also cases where it is 'connected', 'combined', or 'connected' due to another component located between the component and the other component.

[0097] Furthermore, when described as being formed or placed "above" or "below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as "above" or "below," it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0098] The lens driving device (10) may be a voice coil motor (VCM). The lens driving device (10) may be a lens driving motor. The lens driving device (10) may be a lens driving actuator. The lens driving device (10) may include an AF module. The lens driving device (10) may include an OIS module.

[0099] The lens driving device (10) may include a fixed part. The fixed part may be a part that is fixed relatively when the moving part moves. The moving part may move relative to the fixed part.

[0100] The lens driving device (10) may include a base (110). The fixed part may include the base (110). The base (110) may be placed below the AF carrier (210). The base (110) may be placed below the OIS carrier (310). The base (110) may be coupled with a cover (700). The AF carrier (210) and the OIS carrier (310) may be placed on the base (110). The AF carrier (210) and the OIS carrier (310) may be placed on the lower plate (190) of the base (110). The AF carrier (210) and the OIS carrier (310) may be placed within the base (110).

[0101] The base (110) may include a lower plate portion (190). The lower plate portion (190) of the base (110) may support the lower surface of the AF moving portion. The lower plate portion (190) of the base (110) may support the lower surface of the AF carrier (210). The lower plate portion (190) may include an opening (192) having a shape that penetrates from one surface to the other surface in the direction of the optical axis. Through the opening (192), an image sensor and a lens may be positioned facing each other in the direction of the optical axis.

[0102] The base (110) may include a side plate (170) extending upward from the bottom plate (190). The base (110) may include four side plates (170). The four side plates (170) may include a first side plate and a third side plate positioned opposite each other, and a second side plate and a fourth side plate positioned opposite each other. The side plates (170) of the base (110) may include holes (111-113). Each side plate (170) of the base (110) may have one hole formed therein. The holes (111-113) of the base (110) may be formed corresponding to the shape of the coil. The inner surface of the holes (111-113) of the base (110) may face the outer surface of the coil. A coil placed on a substrate (120) that is positioned to surround the side plate (170) of the base (110) through a hole (111-113) formed in the side plate (170) of the base (110) can face the internal space of the base (110).

[0103] The side plate (170) of the base (110) may include first to third holes (111-113). The side plate (170) on which the first hole (111) is placed and the side plate (170) on which the second hole (112) is placed may face each other. The side plate (170) on which the first hole (111) is placed and the side plate (170) on which the second hole (112) is placed may be arranged vertically. The side plate (170) on which the first hole (111) is placed and the side plate (170) on which the third hole (113) is placed may be arranged vertically.

[0104] The AF coil (420) placed on the substrate (120) through the first hole (111) can be exposed inwardly toward the base (110). The OIS-x coil (520) placed on the substrate (120) through the second hole (112) can be exposed inwardly toward the base (110). The OIS-y coil (620) placed on the substrate (120) through the third hole (113) can be exposed inwardly toward the base (110).

[0105] The base (110) may include a stepped portion (180). The stepped portion (180) may be formed at the lower end of the outer surface of the base (110). The stepped portion (180) may protrude from the outer surface of the base (110). The stepped portion (180) may have a shape that protrudes outward from the outer surface of the side plate (170) of the base (110). The stepped portion (180) may be placed at the lower end of the side plate (170). The side plate (720) of the cover (700) may be placed on the stepped portion (180) of the base (110). A substrate (120) may be placed on the stepped portion (180) of the base (110).

[0106] The surface of the base (110) may have areas of different light intensity to increase bonding strength with other components and prevent light scattering. This will be described later.

[0107] The lens driving device (10) may include a substrate (120). The substrate (120) may include a flexible printed circuit board (FPCB). The substrate (120) may be electrically connected to a coil (420, 520, 620). The substrate (120) may be electrically connected to a sensor (430, 530, 630).

[0108] A substrate (120) may be placed on a base (110). The substrate (120) may include a flexible substrate. The substrate (120) may include a flexible printed circuit board (FPCB). The substrate (120) may include an elastic portion.

[0109] The substrate (120) may include four substrates disposed on four sides of the base (110). The four substrates may be formed to wrap around the sides of the base (110). The four substrates may include a first substrate and a third substrate disposed opposite each other, and a second substrate and a fourth substrate disposed opposite each other. At least one of the four substrates may include a terminal portion. The four substrates may include two terminal portions. The two terminal portions may be disposed opposite each other with respect to the optical axis. The terminal portion may include a terminal.

[0110] The substrate (120) may include a terminal. The terminal may be positioned at the bottom of the base (110). The terminal may be coupled to the printed circuit board (50). The terminal may be coupled to the terminal of the printed circuit board (50) through solder. The terminal may be coupled to the terminal of the printed circuit board (50) through a conductive member. The terminal may be connected to the terminal of the printed circuit board (50). The terminal may be electrically connected to the terminal of the printed circuit board (50).

[0111] The lens driving device (10) may include a cover (700). The fixed part may include a cover (700). The cover (700) may be placed on the base (110). The cover (700) may be placed on the base (110). The cover (700) may be coupled to the base (110). The cover (700) may be fixed to the base (110). The cover (700) may accommodate an AF carrier (210) inside. The cover (700) may accommodate an OIS carrier (310) inside. The cover (700) may be a shield member. The cover (700) may be a shield can.

[0112] The cover (700) may include a top plate (710). The top plate (710) may be placed on a moving part. The upward movement of the moving part may be limited by the moving part coming into contact with the top plate (710). The top plate (710) may include a hole through which light passes. The hole may be placed in the center of the top plate (710).

[0113] The cover (700) may include a side plate (720). The side plate (720) may extend downward from the top plate (710). The side plate (720) may be placed on the base (110). The side plate (720) may be placed on a stepped portion that protrudes from the lower end of the outer surface of the base (110). The side plate (720) may include a plurality of side plates. The side plate (720) may include four side plates. The side plate (720) may include a first side plate and a third side plate placed opposite each other, and a second side plate and a fourth side plate placed opposite each other.

[0114] The lens driving device (10) may include a moving part. The moving part may be positioned in a fixed part. The moving part may be positioned within the fixed part. The moving part may be positioned on the fixed part. The moving part may be movably positioned in the fixed part. The moving part may be moved relative to the fixed part by a driving part. The moving part may be moved during AF driving. The moving part may be moved during OIS driving. A lens may be coupled to the moving part.

[0115] The lens driving device (10) may include an AF moving unit. The AF moving unit may be positioned in a fixed part. The AF moving unit may be positioned within the fixed part. The AF moving unit may be positioned on the fixed part. The AF moving unit may be positioned between the fixed part and the OIS moving unit. The AF moving unit may be movably positioned in the fixed part. The AF moving unit may be moved in the direction of the optical axis relative to the fixed part by the AF driving unit. The AF moving unit may be moved during AF driving.

[0116] In the modified example, the AF moving unit and the AF driving unit may be omitted. That is, the OIS moving unit may be placed on the fixed part. Alternatively, the OIS moving unit may be placed on the fixed part, and the AF moving unit may be placed within the OIS moving unit.

[0117] The lens drive unit (10) may include an AF carrier (210). The AF moving unit may include an AF carrier (210). The AF carrier (210) may be an 'AF holder'. The AF carrier (210) may be a 'housing'. The AF carrier (210) may be placed within a base (110). The AF carrier (210) may be placed on the base (110). The AF carrier (210) may be placed within a cover (700). The AF carrier (210) may be placed between the base (110) and the OIS carrier (310). The AF carrier (210) may be placed so as to be movable in the direction of the optical axis.

[0118] The AF carrier (210) may include a bottom plate. The bottom plate may be placed on the base (110). The bottom plate may be placed between the OIS carrier (310) and the bottom plate of the base (110).

[0119] The AF carrier (210) may include a side wall. The side wall may extend upward from the bottom plate. A substrate (120) may be placed on the side wall. An AF coil (420) may be placed on the side wall. An OIS-x coil (520) may be placed on the side wall. An OIS-y coil (620) may be placed on the side wall. The side wall may include a groove that avoids the coil. An AF magnet (410) may be placed on the side wall. An OIS-x magnet (510) may be placed on the side wall. An OIS-y magnet (610) may be placed on the side wall.

[0120] The side wall may include a plurality of side walls. The side wall may include four side walls. The side wall may include a first side wall and a second side wall positioned opposite each other, and a third side wall and a fourth side wall positioned opposite each other. The AF carrier (210) may include a column portion that is not a side wall. One of an AF coil (420), an OIS-x coil (520), and an OIS-y coil (620) may be positioned between two adjacent columns. One of an AF magnet (410), an OIS-x magnet (510), and an OIS-y magnet (610) may be positioned between two adjacent columns.

[0121] The AF carrier (210) may include a hole. The hole may be formed in the side wall of the AF carrier (210). The hole may be open inward. The hole may be formed as a groove. The hole may be replaced by a groove.

[0122] The lens driving device (10) may include an OIS moving part. The OIS moving part may be placed in a fixed part. The OIS moving part may be placed within the fixed part. The OIS moving part may be placed on the fixed part. The OIS moving part may be placed within an AF moving part. The OIS moving part may be movably placed. The OIS moving part may be moved in a direction perpendicular to the optical axis with respect to the fixed part and the AF moving part by an OIS driving part. The OIS moving part may be moved in the x-axis direction by an OIS-x driving part. The OIS moving part may be moved in the y-axis direction by an OIS-y driving part. The OIS moving part may be moved when OIS is driven.

[0123] The lens driving device (10) may include an OIS carrier (310). The OIS moving part may include an OIS carrier (310). The OIS carrier (310) may be an 'OIS holder'. The OIS carrier (310) may be a 'bobbin'. The OIS carrier (310) may be placed within an AF carrier (210). The OIS carrier (310) may be placed within a base (110). The OIS carrier (310) may be placed on the base (110). The OIS carrier (310) may be placed within a cover (700). The OIS carrier (310) may be placed so as to be movable in a direction perpendicular to the optical axis.

[0124] The OIS carrier (310) may include an outer surface. The OIS carrier (310) may include a plurality of sides. The OIS carrier (310) may include a first side and a third side positioned opposite each other, and a second side and a fourth side positioned opposite each other. A magnet may be disposed on at least one of the plurality of sides of the OIS carrier (310). An OIS-x magnet (510) and an OIS-y magnet (610) may be disposed on the sides of the OIS carrier (310). An AF magnet (410) may be disposed on the first side of the OIS carrier (310). An OIS-x magnet (510) may be disposed on the second side of the OIS carrier (310). An OIS-y magnet (610) may be disposed on the third side of the OIS carrier (310).

[0125]

[0126] The lens driving device (10) may include a driving unit. The driving unit may move a moving unit relative to a fixed unit. The driving unit may include an AF driving unit. The driving unit may include an OIS driving unit. The driving unit may include an OIS-x driving unit. The driving unit may include an OIS-y driving unit. The driving unit may include a coil and a magnet.

[0127] The lens driving device (10) may include an AF driving unit. The AF driving unit may move the AF moving unit in the direction of the optical axis. The AF driving unit may move the AF carrier (210) in the direction of the optical axis. The AF driving unit may move the AF carrier (210) in the direction of the optical axis through electromagnetic force. The AF driving unit may include a coil and a magnet.

[0128] In this embodiment, the AF carrier (210) and the OIS carrier (310) can move in the optical axis direction through the interaction between the AF coil (420) and the AF magnet (410). The AF coil (420), the AF carrier (210), and the OIS carrier (310) can move together in the optical axis direction.

[0129] The lens drive unit (10) may include an AF magnet (410). The AF drive unit may include an AF magnet (410). The AF magnet (410) may be an 'AF magnet'. The AF magnet (410) may be a permanent magnet. The AF magnet (410) may be placed in a fixed part. The AF magnet (410) may be placed in a base (110). The AF magnet (410) may be placed in a cover (700). The AF magnet (410) may be placed on a side plate of the cover (700). The AF magnet (410) may be placed on an outer surface of the base (110). The AF magnet (410) may be placed on an inner surface of the base (110). The AF magnet (410) may be fixed to the base (110). The AF magnet (410) can be attached to the base (110). The AF magnet (410) can be attached to the base (110) with adhesive. The AF magnet (410) can be placed inside the cover (700). The AF magnet (410) can interact with the AF coil (420). The AF magnet (410) can have electromagnetic interaction with the AF coil (420). The AF magnet (410) can be placed at a position corresponding to the AF coil (420). The AF magnet (410) can face the AF coil (420). The AF magnet (410) can be opposite the AF coil (420). The AF magnet (410) can overlap the AF coil (420) in a direction perpendicular to the optical axis.

[0130] The lens drive unit (10) may include an AF coil (420). The AF drive unit may include an AF coil (420). The AF coil (420) may interact with the AF magnet (410). The AF coil (420) may face the AF magnet (410). The AF coil (420) may face the AF magnet (410). The AF coil (420) may be positioned at a location corresponding to the AF magnet (410). The AF coil (420) may overlap the AF magnet (410) in a direction perpendicular to the optical axis. The AF coil (420) may be placed on the AF carrier (210). The AF coil (420) may be placed on the AF moving unit.

[0131] In this embodiment, the AF coil (420) can move in the direction of the optical axis. The AF coil (420) can move in the direction of the optical axis through interaction with the AF magnet (410). The AF coil (420) can move together with the AF moving part. The AF coil (420) can move in the direction of the optical axis together with the AF moving part. During the AF driving process, the AF coil (420) can move in the direction of the optical axis together with the AF moving part. The AF coil (420) can be placed in the AF moving part. The AF coil (420) can be fixed to the AF moving part. The AF coil (420) can be coupled to the AF moving part.

[0132] The lens drive unit (10) may include an AF sensor (430). The AF drive unit may include an AF sensor (430). The AF sensor (430) may be a Hall sensor. The AF sensor (430) may be placed on an inner substrate. The AF sensor (430) may detect an AF magnet (410). The AF sensor (430) may detect movement of the AF magnet (410). The amount of movement or position of the AF magnet (410) detected by the AF sensor (430) may be used for feedback of the autofocus drive.

[0133] The AF sensor (430) may be a driver IC. The driver IC may include a sensing unit. The sensing unit may include a Hall element (Hall IC). The driver IC may be electrically connected to the AF coil (420). The driver IC may supply current to the AF coil (420).

[0134] The AF sensor (430) may be placed within the AF coil (420). The AF sensor (430) may overlap with the AF magnet (410) in a direction perpendicular to the optical axis. As a variation, the AF sensor (430) may be placed outside the AF coil (420). The AF sensor (430) may overlap with the AF coil (420) in the direction of the optical axis. The AF sensor (430) may overlap with the AF coil (420) in a direction perpendicular to the optical axis.

[0135] The lens driving device (10) may include an AF yoke (160). The AF yoke (160) may be positioned at a location corresponding to the AF magnet (410). An attractive force may act between the AF yoke (160) and the AF magnet (410). The AF yoke may be positioned on the outside of the substrate (120) on which the AF coil (420) is placed.

[0136] The lens driving device (10) may include an OIS driving unit. The OIS driving unit can move the OIS moving unit in a direction perpendicular to the optical axis. The OIS driving unit can move the OIS carrier (310) in a direction perpendicular to the optical axis. The OIS driving unit can move the OIS carrier (310) in a direction perpendicular to the optical axis through electromagnetic force.

[0137] The lens driving device (10) may include an OIS-x driving unit. The OIS driving unit may include an OIS-x driving unit. The OIS-x driving unit may move the OIS carrier (310) in the x-axis direction perpendicular to the optical axis. The OIS-x driving unit may move the OIS carrier (310) in the x-axis direction perpendicular to the optical axis through electromagnetic force. The OIS-x driving unit may include a coil and a magnet.

[0138] In this embodiment, the OIS-x magnet (510) and the OIS-x coil (520) can move the OIS moving part in a first direction perpendicular to the optical axis direction. At this time, the first direction may be the x-axis direction. Due to the interaction between the OIS-x coil (520) and the OIS-x magnet (510), the OIS carrier (310) can move in the x-axis direction perpendicular to the optical axis direction. The OIS-x magnet (510) and the OIS carrier (310) can move together in the x-axis direction.

[0139] The lens driving device (10) may include an OIS-x magnet (510). The OIS driving unit may include an OIS-x magnet (510). The OIS-x magnet (510) may be an 'OIS-x magnet'. The OIS-x magnet (510) may be a permanent magnet. The OIS-x magnet (510) may be placed in the OIS moving unit. The OIS-x magnet (510) may be spaced apart from the AF magnet (410). The OIS-x magnet (510) may be placed on the OIS carrier (310). The OIS-x magnet (510) may be placed on the outer surface of the OIS carrier (310). The OIS-x magnet (510) may be fixed to the OIS carrier (310). The OIS-x magnet (510) can be coupled to the OIS carrier (310). The OIS-x magnet (510) can be bonded to the OIS carrier (310) with adhesive. The OIS-x magnet (510) can be placed inside the cover (700). The OIS-x magnet (510) can interact with the OIS-x coil (520). The OIS-x magnet (510) can have electromagnetic interaction with the OIS-x coil (520). The OIS-x magnet (510) can be placed at a position corresponding to the OIS-x coil (520). The OIS-x magnet (510) can face the OIS-x coil (520). The OIS-x magnet (510) can be opposite the OIS-x coil (520). The OIS-x magnet (510) can overlap with the OIS-x coil (520) in a direction perpendicular to the optical axis. The OIS-x magnet (510) can overlap with the OIS-x coil (520) in the x-axis direction. The OIS-x magnet (510) can move in the x-axis direction perpendicular to the optical axis.

[0140] The lens driving device (10) may include an OIS-x coil (520). The OIS driving unit may include an OIS-x coil (520). The OIS-x coil (520) may interact with the OIS-x magnet (510). The OIS-x coil (520) may move the OIS-x magnet (510) in the x-axis direction perpendicular to the optical axis. The OIS-x coil (520) may move the OIS-x magnet (510) in the x-axis direction through interaction with the OIS-x magnet (510). The OIS-x coil (520) may face the OIS-x magnet (510). The OIS-x coil (520) may face the OIS-x magnet (510). The OIS-x coil (520) can be positioned at a location corresponding to the OIS-x magnet (510). The OIS-x coil (520) can overlap the OIS-x magnet (510) in a direction perpendicular to the optical axis. The OIS-x coil (520) can be positioned on the AF carrier (210).

[0141] In this embodiment, the OIS-x coil (520) can move together with the AF moving part. The OIS-x coil (520) can move in the optical axis direction together with the AF moving part. During the AF driving process, the OIS-x coil (520) can move in the optical axis direction together with the AF moving part. The OIS-x coil (520) can be placed in the AF moving part. The OIS-x coil (520) can be fixed to the AF moving part. The OIS-x coil (520) can be coupled to the AF moving part.

[0142] The lens driving device (10) may include an OIS-x sensor (530). The OIS driving unit may include an OIS-x sensor (530). The OIS-x sensor (530) may include a Hall sensor. The OIS-x sensor (530) may detect an OIS-x magnet (510). The OIS-x sensor (530) may detect the magnetic force of the OIS-x magnet (510). The OIS-x sensor (530) may be positioned above the OIS-x magnet (510). The OIS-x sensor (530) may overlap with the OIS-x magnet (510) in the direction of the optical axis. As a variation, the OIS-x sensor (530) may be positioned within the OIS-x coil (520). The OIS-x sensor (530) may overlap with the OIS-x coil (520) in the direction of the optical axis. The OIS-x sensor (530) may overlap with the OIS-x coil (520) in a direction perpendicular to the optical axis. The OIS-x sensor (530) may face the OIS-x magnet (510). The OIS-x sensor (530) may be positioned at a location corresponding to the OIS-x magnet (510). The OIS-x sensor (530) may detect the movement of the OIS-x magnet (510). The amount of movement or position of the OIS-x magnet (510) detected by the OIS-x sensor (530) may be used for feedback of the hand shake correction drive in the x-axis direction.

[0143] The lens driving device (10) may include an OIS-x yoke. The OIS-x yoke may be placed on the OIS-x magnet (510). The OIS-x yoke may be placed between the OIS-x magnet (510) and the OIS carrier (310). The OIS-x yoke can prevent magnetic flux leakage of the OIS-x magnet (510) to improve the interaction force with the OIS-x coil (520).

[0144] When viewed from above, the AF magnet (410), AF coil (420), OIS-y magnet (610), and OIS-y coil (620) can be arranged in order along a virtual straight line. When viewed from above, the AF magnet (410), AF coil (420), OIS-y magnet (610), and OIS-y coil (620) can be arranged in order along a virtual straight line. When viewed from above, the AF magnet (410), AF coil (420), OIS-y magnet (610), and OIS-y coil (620) can be arranged in order. When viewed from above, the AF magnet (410), AF coil (420), OIS-y magnet (610), and OIS-y coil (620) can be arranged in order along the y-axis direction. When viewed from above, the AF magnet (410), AF coil (420), OIS-y magnet (610) and OIS-y coil (620) can overlap in the y-axis direction.

[0145] The lens driving device (10) may include a guide member (not shown). The guide member may include a ball. The guide member may include a pin. The guide member may include a cylindrical member. The guide member may guide the movement of the moving part relative to the fixed part in a specific direction.

[0146] The lens driving device (10) may include an AF guide ball (not shown). The AF guide ball may include a plurality of ball bearings arranged along the optical axis direction. The AF guide ball may guide the movement of the AF moving part relative to the fixed part in the optical axis direction. The AF guide ball may guide the movement relative to the base (110) of the AF carrier (210) in the optical axis direction. The AF guide ball may be positioned between the fixed part and the AF moving part. The AF guide ball may be positioned between the base (110) and the AF carrier (210). The AF guide ball may be positioned between the base (110) and the AF carrier (210) in the x-direction. Alternatively, the AF guide ball may be positioned between the base (110) and the AF carrier (210) in the y-direction. The base (110) may include a side wall extending upward from the bottom plate. A groove recessed inwardly may be formed in the side wall of the base (1100) to accommodate an AF guide ball. The AF guide ball may be placed in the groove of the base (110). The AF guide ball may be placed in the groove of the AF carrier (210). The AF guide ball may be spherical. The AF guide ball may be formed of metal. Grease may be applied to the surface of the AF guide ball.

[0147] The lens driving device (10) may include an OIS guide member. The OIS guide member may be a guide member. The OIS guide member may be a guide portion. The OIS guide member may be a guide plate. The OIS guide member may be a guide plate. The OIS guide member may be a guide structure.

[0148] The OIS guide member can guide the movement of the OIS carrier (310) relative to the AF carrier (210) in a direction perpendicular to the optical axis. The OIS guide member can be positioned between the AF moving part and the OIS moving part. The OIS guide member can be positioned between the AF carrier (210) and the OIS carrier (310). The OIS guide member can be positioned between the AF carrier (210) and the OIS carrier (310) in the direction of the optical axis. The OIS guide member may be referred to as a moving member. An OIS ball bearing part (710) can be positioned between the AF carrier (210) and the OIS guide member. An OIS ball bearing part (710) can be positioned between the OIS carrier (310) and the OIS guide member. The carrier (310) may have an inwardly recessed groove formed in the corner of the lower plate so that the OIS ball bearing part (710) is positioned. The AF carrier (210) may have an inwardly recessed groove formed in the bottom plate so that the OIS ball bearing part (710) is positioned therein.

[0149] The lens driving device (10) may include an elastic member (150). The elastic member may be formed to support OIS driving. The elastic member may support the movement of the OIS moving part. The elastic member may be formed to press the OIS guide member. The elastic member may be formed to guide both OIS-x axis driving and OIS-y axis driving using only the OIS guide member. The elastic member may include a plate spring. The elastic member may include a wire. The elastic member may have elasticity. The elastic member may be formed of metal.

[0150] The elastic member can press the OIS guide member in the direction of the AF moving part. The elastic member can press the OIS moving part in the direction of the AF moving part. At this time, the elastic member may include an upper elastic member, a lower elastic member, and a wire.

[0151] Referring to FIG. 9, the side wall of the base (110) may include a groove formed symmetrically with respect to the first hole (111). A second guide magnet part (Mb) may be symmetrically arranged with respect to the first hole (111) on the side wall of the base (110). The second guide magnet part (Mb) may include a second guide magnet (M2) and a fourth guide magnet (M4). The length (Lb) in the optical axis direction of the second guide magnet part (Mb) may be formed to be greater than the length (La) in the optical axis direction of the first guide magnet part (Ma).

[0152] Referring to FIG. 10, the side wall of the AF carrier (210) may include a groove formed symmetrically with respect to the AF magnet (410). A first guide magnet section (Ma) may be symmetrically arranged with respect to the AF magnet (410) on the side wall of the AF carrier (210). The first guide magnet section (Ma) may include a first guide magnet (M1) and a third guide magnet (M3).

[0153] The first guide magnet part (Ma) and the second guide magnet part (Mb) can be arranged to face each other. The first guide magnet part (Ma) can overlap the second guide magnet part (Mb) in a direction perpendicular to the optical axis. The first guide magnet (M1) can be arranged to face the second guide magnet (M2). The third guide magnet (M3) can be arranged to face the fourth guide magnet (M4). The length of the first guide magnet (M1) in the optical axis direction can be smaller than the length of the second guide magnet (M2) in the optical axis direction. The length of the third guide magnet (M3) in the optical axis direction can be smaller than the length of the fourth guide magnet (M4) in the optical axis direction.

[0154] Referring to FIGS. 13 and 14, a step may be formed between the first surface (115) where the first hole (111) is formed on the side wall of the base (110) and the surface where the second guide magnet part (Mb) is placed. The second surface (116a) where the second guide magnet (M2) is placed may protrude inwardly more than the first surface (115). The third surface (116b) where the fourth guide magnet (M4) is placed may protrude inwardly more than the first surface (115). The side wall of the base (110) may include a first stepped surface (117a) connecting the first surface (115) and the second surface (116a), and a second stepped surface (117b) connecting the first surface (115) and the third surface (116b).

[0155] A step difference may be formed between the fourth surface (211) where the AF magnet (410) is positioned and the surface where the first guide magnet part (Ma) is positioned on the side wall of the AF carrier (210). The fifth surface (212a) where the first guide magnet (M1) is positioned may be recessed inwardly compared to the fourth surface (211). The sixth surface (212b) where the third guide magnet (M3) is positioned may be recessed inwardly compared to the fourth surface (211). The side wall of the AF carrier (210) may include a third stepped surface (213a) connecting the fourth surface (211) and the fifth surface (212a), and a fourth stepped surface (213b) connecting the fourth surface (211) and the sixth surface (212b).

[0156] The first surface (115) of the base (110) and the fourth surface (211) of the AF carrier (210) may be arranged to face each other. The second surface (116a) of the base (110) and the fifth surface (212a) of the AF carrier (210) may be arranged to face each other. The third surface (116b) of the base (110) and the sixth surface (212b) of the AF carrier (210) may be arranged to face each other. The first stepped surface (117a) of the base (110) may be arranged to face the third stepped surface (213a) of the AF carrier (210). The second stepped surface (117b) of the base (110) may be arranged to face the fourth stepped surface (213b) of the AF carrier (210). The first to third surfaces (115, 116a, 116b) of the base (110), the first and second stepped surfaces (117a, 117b), and the fourth to sixth surfaces (211, 212a, 212b) and the third and fourth stepped surfaces (213a, 213b) of the AF carrier may be spaced apart in a direction perpendicular to the optical axis.

[0157] Excessive tilting can be prevented through a structure in which the inner side of the side wall of the base (110) and the outer side of the side wall of the AF carrier (210) interlock with each other. Additionally, a space for tilting during AF correction and OIS correction can be secured through a gap formed between the inner side of the side wall of the base (110) and the inner side of the side wall of the AF carrier (210).

[0158] Referring to FIG. 11, the first guide magnet part (Ma) and the second guide magnet part (Mb) may have the same polarity. A mutual repulsive force may act between the first guide magnet part (Ma) and the second guide magnet part (Mb). While the AF carrier (210) moves at maximum stroke, the first guide magnet part (Ma) may overlap with the second guide magnet part (Mb) in a direction perpendicular to the optical axis. While the AF carrier (210) moves at maximum stroke, the first guide magnet part (Ma) may face the second guide magnet part (Mb).

[0159] When the AF carrier (210) moves in the direction of the optical axis, the magnetic levitation effect can prevent tilting of the AF carrier (210) and guide the stroke movement. In addition, the second guide magnet part (Mb) acts as a guide rail, and can reduce the dynamic tilt effect caused by perpendicularity and flatness during the injection of the actuator, and since no ball is used, dents caused by impact can be prevented.

[0160] Referring to FIG. 12, according to another embodiment of the present invention, the first guide magnet part (Ma) and the second guide magnet part (Mb) can generate AF driving driving force and increase AF driving speed. In the first guide magnet part (Ma), magnets having different polarities can be arranged alternately along the optical axis direction. For example, in the first guide magnet part (Ma), magnets with S-pole, N-pole, S-pole, and N-pole can be arranged alternately along the optical axis direction. In the second guide magnet part (Mb), magnets having different polarities can be arranged alternately along the optical axis direction. For example, in the second guide magnet part (Mb), magnets with S-pole and N-pole can be arranged alternately along the optical axis direction.

[0161] A magnet having one polarity in the second guide magnet section (Mb) can be positioned to face a magnet having two different polarities in the first guide magnet section (Ma). For example, a magnet having an S pole in the second guide magnet section (Mb) may have an attractive force with a magnet having an N pole in the first guide magnet section (Ma), and a repulsive force with a magnet having an S pole in the first guide magnet section (Ma). That is, the first guide magnet section (Ma) and the second guide magnet section (Mb) can generate a driving force in one direction of the AF carrier (210).

[0162] Referring to FIG. 15, the first guide magnet section (Ma) may additionally include a fifth guide magnet (M5) and a seventh guide magnet (M7) in addition to the first guide magnet (M1) and the third guide magnet (M3). The second guide magnet section (Mb) may additionally include a sixth guide magnet (M6) and an eighth guide magnet (M8) in addition to the second guide magnet (M2) and the fourth guide magnet (M4). Descriptions of the fifth guide magnet (M5) and the seventh guide magnet (M7) that overlap with the description of the first guide magnet section (Ma) described above are omitted. Descriptions of the sixth guide magnet (M6) and the eighth guide magnet (M8) that overlap with the description of the second guide magnet section (Mb) described above are omitted.

[0163] The fifth guide magnet (M5) and the seventh guide magnet (M7) can be symmetrically positioned on the AF carrier (210) with respect to the OIS-x magnet (510). The sixth guide magnet (M6) and the eighth guide magnet (M8) can be symmetrically positioned on the base (110) with respect to the second hole (112) of the base (110). The fifth guide magnet (M5) can be positioned to face the sixth guide magnet (M6). The seventh guide magnet (M7) can be positioned to face the eighth guide magnet (M8). The first guide magnet (M1), the second guide magnet (M2), the fifth guide magnet (M5), and the sixth guide magnet (M6) can be positioned to overlap in a direction perpendicular to the optical axis. The third guide magnet (M3), the fourth guide magnet (M4), the seventh guide magnet (M7), and the eighth guide magnet (M8) can be arranged to overlap in a direction perpendicular to the optical axis.

[0164] At least one set of the first guide magnet (M1) and the second guide magnet (M2), the third guide magnet (M3) and the fourth guide magnet (M4), the fifth guide magnet (M5) and the sixth guide magnet (M6), and the seventh guide magnet (M7) and the eighth guide magnet (M8) may have the same polarity and have a magnetic levitation effect. At least one set of the first guide magnet (M1) and the second guide magnet (M2), the third guide magnet (M3) and the fourth guide magnet (M4), the fifth guide magnet (M5) and the sixth guide magnet (M6), and the seventh guide magnet (M7) and the eighth guide magnet (M8) may include a plurality of magnets having different polarities and may generate AF driving force. For example, the first guide magnet (M1) and the second guide magnet (M2), and the seventh guide magnet (M7) and the eighth guide magnet (M8), which are arranged diagonally, may each have the same polarity and provide a magnetic levitation effect. Additionally, the third guide magnet (M3) and the fourth guide magnet (M4), and the fifth guide magnet (M5) and the sixth guide magnet (M6) may include multiple magnets having different polarities and may generate AF driving force. This is merely illustrative and is not specifically limited thereto.

[0165] Referring to FIGS. 16 to 18, a guide coil portion (Ca) may be disposed on the side wall of the base (110) at a position where a first guide magnet portion (Ma) is disposed. The guide coil portion (Ca) may be disposed to face the second guide magnet portion (Mb). The guide coil portion (Ca) may include a first guide coil (C1) and a second guide coil (C2) disposed on both sides based on the AF coil (420). The first guide coil (C1) may face the first guide magnet (M1). The second guide coil (C2) may face the third guide magnet (M3).

[0166] The length of the guide coil section (Ca) in the optical axis direction may be greater than the length of the second guide magnet section (Mb) in the optical axis direction. The second guide magnet section (Mb) may overlap the guide coil section (Ca) in a direction perpendicular to the optical axis. When power is applied to the guide coil section (Ca), the guide coil section (Ca) and the second guide magnet section (Mb) can drive the AF carrier (210) in one direction through electromagnetic interaction. Through the electromagnetic interaction between the guide coil section (Ca) and the second guide magnet section (Mb), the AF driving force can be reinforced in the AF driving section, and the AF driving speed can be increased.

[0167] At least a portion of the base (110) of the camera module according to the present embodiment may be composed of a composite polymer including the filler described above with reference to FIGS. 1 and FIG. 2. At least a portion of the base (110) of the camera module according to the present embodiment may be composed of a composite polymer including the matrix described above with reference to FIGS. 3 to 6.

[0168] At least a portion of the AF carrier (210) of the camera module according to the present embodiment may be composed of a composite polymer including the filler described above with reference to FIGS. 1 and FIG. 2. At least a portion of the AF carrier (210) of the camera module according to the present embodiment may be composed of a composite polymer including the matrix described above with reference to FIGS. 3 to 6.

[0169] At least a portion of the OIS carrier (310) of the camera module according to the present embodiment may be composed of a composite polymer including the filler described above with reference to FIGS. 1 and FIGS. 2. At least a portion of the OIS carrier (310) of the camera module according to the present embodiment may be composed of a composite polymer including the matrix described above with reference to FIGS. 3 to 6.

[0170] Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without changing its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

Claims

1. In the case of composite polymers, Includes ester-based resin, The above ester-based resin comprises a first repeating unit comprising one aromatic ring and an ester group, and a second repeating unit comprising two to six aromatic rings and ester groups, and A composite polymer in which the ratio of the weight of the first part consisting of the first repeating unit and the weight of the second part consisting of the second repeating unit in the above ester-based resin is 1:2 to 1:

6.

2. In Paragraph 1, FT-IR analysis results for the above composite polymer, 1400 cm -1 Wow, 1500 cm -1 Two peaks were identified in between, and A composite polymer in which the peak value of the first peak having the higher wavenumber among the two peaks is at least 0.85 times the peak value of the second peak having the lower wavenumber among the two peaks.

3. In Paragraph 1, The second repeating unit comprises three aromatic rings, and in the FT-IR analysis results for the ester resin or the composite polymer, at least one peak corresponding to the three aromatic rings is higher than the peak corresponding to one aromatic ring, or The second repeating unit comprises four aromatic rings, and in the FT-IR analysis results for the ester resin or the composite polymer, at least one peak corresponding to the four aromatic rings is higher than the peak corresponding to one aromatic ring, or The second repeating unit comprises five aromatic rings, and in the FT-IR analysis results for the ester resin or the composite polymer, at least one peak corresponding to the five aromatic rings is higher than the peak corresponding to one aromatic ring, or A composite polymer in which the second repeating unit comprises six aromatic rings, and in which, as a result of FT-IR analysis of the ester resin or the composite polymer, at least one peak corresponding to six aromatic rings is higher than the peak corresponding to one aromatic ring.

4. In Paragraph 1, The above second repeating unit includes two aromatic rings, and A composite polymer in which, according to the Pyro-GC / MS (Pyrolysis-Gas Chromatography / Mass Spectrometry) analysis results for the above ester resin or the above composite polymer, the fourth peak corresponding to two aromatic rings is higher than the third peak corresponding to one aromatic ring.

5. In Paragraph 1, The above second repeating unit includes three aromatic rings, and A composite polymer in which, in the Pyro-GC / MS analysis results for the above ester resin or the above composite polymer, the fourth peak corresponding to three aromatic rings is higher than the third peak corresponding to one aromatic ring.

6. In Paragraph 1, A composite polymer comprising a filler comprising a first mineral composed of crystals including barium and calcium.

7. In Paragraph 6, The first mineral above is a composite polymer having a hexagonal crystal structure.

8. In Paragraph 6, The molecular formula of the first mineral mentioned above is Ba x Ca (2-x) A composite polymer of SiO4, where x is greater than 0 and less than 2.

9. In Paragraph 6, The above filler is a composite polymer further comprising at least one of a second mineral having BaSiO as a unit crystal, a third mineral having CaSiO as a unit crystal, and a fourth mineral having BaSO4 as a unit crystal.

10. Regarding the camera module, It includes a base, a carrier disposed on the base, and a ball bearing. A camera module in which at least a portion of at least one of the base and the carrier is composed of a composite polymer according to one of claims 1 to 9.

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