Lenses, lens assemblies, and mobile electronic devices

Abstract

A lens is provided. The lens includes a lens unit and a jagged layer disposed on at least a portion of a surface of the lens unit, wherein the jagged layer includes a plurality of particles interspersed therein.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2021-0182706, filed on December 20, 2021, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical Field

[0003] The following description relates to lenses, lens assemblies, and mobile electronic devices. Background Technology

[0004] As the functionality of cameras in mobile electronic devices (such as, but not limited to, mobile phones, tablet PCs, laptops, and similar devices) has improved, so too has the technology of lenses implemented therein. Lenses can collect or scatter light, and by achieving this function, they can magnify or reduce the size of an image. The representative function of a lens can utilize the linear propagation and refraction properties of light. By achieving these functions, the amount of light passing through the lens in the image can be increased or decreased. Furthermore, when implementing a lens, the field of view can differ from the actual field of view, and therefore, lenses can be implemented that can capture images wider or further magnified than the actual image seen by the human eye. However, when light is refracted, it may not converge at a single point and may diffuse or become distorted. This phenomenon can be called aberration. Due to aberration, the image captured by the lens may be distorted and may affect sharpness, potentially reducing image resolution. To address this problem, various combinations of lenses can be used, and aberrations can be corrected by combining various lenses implemented in a camera.

[0005] However, light incident on a lens may cause internal reflections on the lens's surface or inner walls. This light can cause flare on a screen, and to prevent this, it may be necessary to minimize light transmittance and reflectance in the visible light region.

[0006] The above information is presented as background information only to aid in understanding this disclosure. No determination or assertion is made as to whether any of the above content can be used as prior art with respect to this disclosure. Summary of the Invention

[0007] The summary portion of this invention is intended to provide a brief overview of the chosen inventive concepts, which will be further described in the detailed description portion below. This summary portion is not intended to identify key or essential features of the claimed subject matter, nor to help determine the scope of the claimed subject matter.

[0008] In general, the lens includes a lens unit; and a serrated layer disposed on at least a portion of the surface of the lens unit, wherein the serrated layer includes a plurality of particles dispersed therein.

[0009] The serrated layer may include nano-serrated structures.

[0010] The serrated layer may include multiple conical structures with different sizes.

[0011] The serrated layer may include irregularly shaped serrated structures.

[0012] The serrated layer may include a porous structure.

[0013] Multiple particles can include nanoparticles.

[0014] Multiple particles may include ceramic particles.

[0015] Ceramic particles may include ZrO2 particles.

[0016] The lens may also include an adhesive layer disposed between the lens unit and the serrated layer.

[0017] The adhesive layer may include at least one of SiO2, TiO2 and silane compounds.

[0018] The lens unit and the serrated layer can be configured to be integrated with each other.

[0019] The serrated layer may include at least one of Al2O3 and SiO2.

[0020] In general, the lens assembly includes a lens unit, the lens unit including at least one lens, wherein at least one of the at least one lenses is configured as a low-reflection lens, and wherein a serrated layer is disposed on at least a portion of the surface of the lens unit, the serrated layer including a plurality of particles dispersed therein.

[0021] A low-reflection lens may be positioned on the outermost side of the lens assembly in the optical axis direction within at least one lens.

[0022] The low-reflection lens may include a first surface and a second surface opposite to the first surface, and a serrated layer is disposed on the first surface but not on the second surface.

[0023] The low-reflection lens is configured such that the second surface is positioned on the outside of the lens assembly in the optical axis direction.

[0024] The lens assembly may also include a plurality of low-reflection lenses, and the plurality of low-reflection lenses are arranged on the outermost side of the lens assembly in the optical axis direction in at least one lens.

[0025] In general, the mobile electronic device includes a display; and a lens assembly, wherein the lens assembly includes a lens unit, the lens unit includes at least one lens, and at least one of the at least one lens is configured as a low-reflection lens, and a serrated layer is disposed on at least a portion of the surface of the lens unit, the serrated layer including a plurality of particles dispersed therein.

[0026] A low-reflection lens may be positioned on the outermost side of the lens assembly along the optical axis of at least one lens.

[0027] The lens assembly can be covered by the display.

[0028] The lens assembly can be covered by the tempered glass portion of the display.

[0029] In general, the lens assembly includes a plurality of lenses; wherein at least one of the plurality of lenses is configured as a low-reflection lens, wherein the low-reflection lens includes a first uneven layer disposed on a first surface of the low-reflection lens and a second uneven layer disposed on a second surface of the low-reflection lens, and wherein the low-reflection lens is disposed on the outermost side of the lens assembly on the light incident side among the plurality of lenses.

[0030] The first and second uneven layers may include multiple ceramic particles.

[0031] Ceramic particles may include ZrO2 particles.

[0032] The uneven layer can be configured to have a stepped or serrated structure.

[0033] Other features and aspects will become apparent from the appended claims, the accompanying drawings, and the detailed description below. Attached Figure Description

[0034] Figure 1 A cross-sectional view of an exemplary lens according to one or more embodiments is shown.

[0035] Figure 2 It shows Figure 1 An enlarged view of a region of an exemplary lens in the image.

[0036] Figure 3 A perspective view of an example of a serrated layer according to one or more embodiments is shown.

[0037] Figure 4 A diagram showing a portion of the process for manufacturing an exemplary lens according to one or more embodiments is illustrated.

[0038] Figure 5 , Figure 6 and Figure 7 A cross-sectional view of an exemplary lens according to one or more embodiments is shown.

[0039] Figure 8 A graph comparing the reflectivity of the lens between an exemplary implementation and a comparative example is shown.

[0040] Figure 9 A perspective view of an exemplary lens assembly is shown.

[0041] Figure 10 and Figure 11 A cross-sectional view is shown of an example of a plurality of lenses implemented in an exemplary lens assembly according to one or more embodiments.

[0042] Figure 12 and Figure 13 This is a perspective view illustrating an exemplary mobile electronic device according to one or more embodiments, showing the front and rear portions of the exemplary mobile electronic device, respectively.

[0043] Figure 14 and Figure 15 It shows Figure 12 and Figure 13 An enlarged cross-sectional view of the area surrounding an exemplary lens assembly.

[0044] Throughout the accompanying drawings and detailed embodiments, the same reference numerals refer to the same elements. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative dimensions, scale, and depiction of elements in the drawings may be exaggerated. Detailed Implementation

[0045] The following specific embodiments are provided to help readers gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein, except for operations that must occur in a specific order, but can be changed as will become apparent after understanding the disclosure of this application. Furthermore, for clarity and conciseness, descriptions of features known after understanding the disclosure of this application may be omitted; however, it should be noted that the omission of features and their descriptions is not intended to acknowledge them as common knowledge.

[0046] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways in which the methods, apparatuses, and / or systems described herein will be apparent upon understanding the disclosure of this application.

[0047] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited by these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, first part, first region, first layer, or first section mentioned in these examples may also be referred to as a second component, second part, second region, second layer, or second section.

[0048] Throughout this specification, when an element such as a layer, region, or substrate is described as being "on," "connected to," or "attached to" another element, the element may be directly "on," directly "connected to," or directly "attached to" the other element, or there may be one or more other elements between the element and the other element. Conversely, when an element is described as being "directly on," "directly connected to," or "directly attached to" another element, there are no other elements between the element and the other element.

[0049] The terminology used herein is for the purpose of describing specific examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to include the plural forms as used herein. As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more items. As used herein, the terms “comprising,” “including,” and “having” indicate the presence of the stated features, numbers, operations, elements, components, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, elements, components, and / or combinations thereof.

[0050] In addition, terms such as first, second, A, B, (a), (b) may be used herein to describe components. Each of these terms is not used to define the substance, order, or sequence of the corresponding component, but only to distinguish the corresponding component from the other components.

[0051] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as would be normally understood by one of ordinary skill in the art to which this disclosure pertains, upon understanding the disclosure of this application. For example, those terms as defined in commonly used dictionaries shall be interpreted as having meaning consistent with their meaning in the context of the relevant field and in the disclosure of this application, and shall not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0052] Furthermore, in the description of exemplary embodiments, such descriptions will be omitted when it is believed that a detailed description of a structure or function known after understanding the disclosure of this application would lead to a vague interpretation of the exemplary embodiments.

[0053] In the following description, examples will be described in detail with reference to the accompanying drawings, and the same reference numerals in the drawings denote the same elements throughout the text.

[0054] Figure 1 A cross-sectional view of an exemplary lens according to one or more embodiments is shown. Figure 2 It shows Figure 1 An enlarged view of a region of an exemplary lens in the image. Figure 3 This is a perspective view showing an example of a serrated layer. Figure 4 This is a diagram illustrating a portion of the lens manufacturing process according to an example. Figures 5 to 7 This is a cross-sectional view showing an exemplary lens according to one or more embodiments.

[0055] Reference Figure 1 and Figure 2 An exemplary lens 100 according to one or more embodiments may include a lens unit 110 and a serrated layer 120 formed or disposed on at least a portion of the surface of the lens unit 110. In an example, the serrated layer 120 may include a plurality of particles 121 injected into the serrated layer 120. Figure 2 In this context, the serrated layer 120 is emphasized in contrast to the lens unit 110, and the size of the serrated layer 120 may be smaller than that shown in the example. Although layer 120 is described as a serrated layer, this is only an example, and in one or more examples, layer 120 may have different non-uniform structures, such as a stepped structure.

[0056] Regarding lens unit 110, its shape or type is not limited to any specific example, and it can be implemented in the form of a lens in an optical device such as, but not limited to, a camera module or camera apparatus. Therefore, the shape of lens unit 110 can be modified to differ from... Figure 1 The shape shown is an example.

[0057] In a non-limiting example, the lens unit 110 may be formed of a plastic resin comprising a resin component, and in the example, the plastic resin may include at least one of polycarbonate and polyolefin, but is not limited thereto. In the example, the polyolefin may include at least one of cyclic olefin polymers and cyclic olefin copolymers. Additionally, in the example, the lens unit 110 may be configured as a glass lens.

[0058] The serrated layer 120 can be formed on at least a portion of the surface of the lens unit 110, and the serrated layer 120 can be implemented as a low-reflection structure. In the example, the serrated layer 120 can be formed on one surface S1 of the lens unit 110. However, this is merely an example, and the serrated layer 120 can be formed only on a portion of one surface S1 of the lens unit 110, and furthermore, the serrated layer 120 can be formed on both the first surface S1 and the second surface S2 of the lens unit 110.

[0059] There may be limitations in reducing reflectivity through conventionally used reflective coatings on the surface of a lens. However, in an exemplary embodiment, the reflectivity of the lens 100 can be reduced by the serrated structure of the surface of the serrated layer 120; that is, for example, a reflectivity of 0.2% or lower can be achieved. The reflectivity can be reduced because the refractive index of the serrated layer 120 and the refractive index of air can be combined to reduce the average refractive index, and the reflectivity can be reduced when incident light is scattered due to the serrated layer 120.

[0060] By applying Fresnel's equations, the greater the difference in refractive index between the different layers, the more reflections occur at the interface surface, and the reflectivity can be reduced due to the overlap and destructive interference of light reflected from the boundary surface. Based on this principle, the serrated layer 120 can preferably have a size similar to the wavelength of light, and therefore, the serrated layer 120 can include a nano-serrated structure.

[0061] In addition, such as Figure 3 As shown, the serrated layer 120 may include multiple conical structures of different sizes. When the serrated layer 120 has conical structures, the refractive index on the surface of the serrated layer 120 can be gradually changed, and therefore, the reflectivity of the serrated layer 120 can be further reduced. The serrated layer 120 may include a material layer with high reflectivity in the visible light region, i.e., in the example, an Al2O3 layer, a SiO2 layer, etc., and specifically, the Al2O3 layer and the SiO2 layer can be deposited by various deposition methods, such as, for example, atomic layer deposition (ALD) and physical vapor deposition (PVD), and appropriate processes (such as, for example, plasma etching, photolithography, imprinting, etc.) that can be applied to form irregularities on the surface to form serrations on its surface. Furthermore, in the example, the serrated layer 120 may include multiple conical structures, but the serrated structures can be formed as irregular structures, i.e., for example, a porous structure with multiple irregularly formed pores.

[0062] When a serrated structure, particularly a nano-serrated structure, is formed on the surface of the serrated layer 120, the durability may be relatively low, which may limit the surface to be coated. Furthermore, processing the layer during the assembly of the lens 100 may be difficult and manufacturing costs may increase.

[0063] In an exemplary embodiment, a structure in which a plurality of particles 121 are dispersed in the serrated layer 120 can be implemented to address the problem of reduced durability. In the example, the plurality of particles 121 may include nanoparticles, i.e., in the example, the diameter d of the nanoparticles may be 10 nm or less. The diameter d of the nanoparticles may be the average of the diameters d of the nanoparticles in an image obtained from a cross-section of the lens unit 110, i.e., in the example, a cross-section of the serrated layer 120 obtained in the thickness direction (perpendicular to the direction perpendicular to the figure), and the reliability of the diameter d value can be increased by obtaining multiple cross-sections with equal distances between them. The plurality of particles 121 can realize a material with excellent durability, and in the example, the plurality of particles 121 may include ceramic particles. More specifically, by way of example only, the ceramic particles may include ZrO2 particles. ZrO2 can have high stability to light and heat, and compared with other materials (such as, for example, Al2O3), ZrO2 can have high hardness and high tensile strength as well as excellent wear resistance. Furthermore, compared to Al2O3, ZrO2 can possess superior mechanical properties, such as a low coefficient of friction. Therefore, when multiple particles 121 include ZrO2 particles, the structural stability and durability of the serrated layer 120, as well as the structural stability and durability of the lens 100 using the serrated layer 120, can be improved. The lens 100 with this superior durability can be used as the outermost lens in a lens assembly.

[0064] The refractive index of the serrated layer 120 can vary depending on the content of the plurality of particles 121, and the plurality of particles 121 can be uniformly dispersed in the serrated layer 120. Furthermore, the content of the plurality of particles 121 can be adjusted by considering the mechanical properties, refractive index, etc., of the serrated layer 120. In the example, the plurality of particles 121 can be dispersed in the serrated layer 120 at an amount of approximately 5-50 wt% throughout the serrated layer 120.

[0065] The following describes an example of a method for manufacturing a serrated layer 120 in which multiple particles 121 are dispersed.

[0066] Reference Figure 4To form a coating 120' on the surface of the lens unit 110, a coating solution comprising ZrO2 particles with a diameter of approximately 2-10 nm can be prepared and applied to the surface of the lens unit 110. Specifically, an Al2O3 component or a SiO2 component (or both) can be formed in a solvent containing ethanol and deionized water (DI water) using a sol-gel synthesis method, and the coating solution can be obtained by mixing this solution with ZrO2 particles. The solvent can be mixed after the formation of the Al2O3 component or the SiO2 component (or both). Alternatively, ZrO2 particles can be added to the coating solution in a mixed state in a solvent including ethanol, molar, organic acids, etc., and can have a surface-modified structure to be uniformly dispersed in the coating solution. The coating solution obtained above can be applied to the surface of the lens unit 110 by methods such as, but not limited to, dip coating or spin coating, and can be annealed at a temperature of about 60-150°C to evaporate the solvent, thereby forming a coating 120'. The coating 120' can be formed to have a thickness of about 10-500 nm. In order to uniformly maintain optical properties such as the transmittance of the lens 100, a plurality of particles 121 can be uniformly dispersed in the serrated layer 120, and by implementing the above manufacturing method, particle aggregation can be prevented, and a structure in which a plurality of particles 121 are uniformly dispersed can be effectively achieved.

[0067] After forming the coating 120', a serrated structure can be formed on the surface of its lens unit 110, and in this example, a tapered structure can be achieved by plasma etching, wet etching, etc., as described above. Furthermore, a porous and irregular serrated structure can be formed on the surface of the coating 120', which can be used to form a structure with... Figure 5 The example shown is a method for forming an irregular serrated layer 120, and the irregular serrated structure can be formed by reacting the coating 120' in deionized water at about 50-90°C for about 1 hour. Furthermore, the irregular serrated structure can be formed by reacting the coating 120' with an aqueous solution containing stabilizers such as phosphoric acid and citric acid.

[0068] Reference Figure 6 and Figure 7 Describe one or more examples. Figure 6 In the example shown, an adhesive layer 130 may also be included between the lens unit 110 and the serrated layer 120. Therefore, the serrated layer 120 and the lens unit 110 can be more stably bonded to each other. By way of example only, the adhesive layer 130 may include at least one of SiO2, TiO2, and silane compounds.

[0069] After that, as in Figure 7In the example shown, the lens unit 210 and the serrated layer 220 can be formed as an integrated structure. The serrated layer 220 may include a plurality of particles 221, and the lens unit 210 may also include a plurality of particles 211. A lens with an integrated structure can be formed by means of, for example Figure 7 The imprinting method shown is used to achieve this. Specifically, a lens in which the lens unit 210 and the serrated layer 220 have an integrated structure can be obtained by imprinting a composite material in which ZrO2 particles are dispersed in a transparent thermoplastic resin using an upper mold 251 and a lower mold 252. For a lens with such an integrated structure, the serrated layer 220 with a low-reflection structure can be achieved by imprinting a composite material in which nanoparticles are dispersed in a separate coating process without a coating process, and the lens can have a very high level of structural stability when the lens unit 210 and the serrated layer 220 are formed in an integrated structure.

[0070] Figure 8 This is a graph (solid line) showing the reflectivity of a lens comprising a serrated layer 120 with multiple particles 121 dispersed therein, and a comparative example (dashed line) can indicate a lens having a serrated layer that does not include the multiple particles. Figure 8 The experimental results show that in a lens in which multiple particles 121 are dispersed in a serrated layer 120, the reflectivity is reduced to 0.2% or less in most of the visible light region, and unlike the example above, in a lens according to a comparative example in which no particles are used, the reflectivity increases throughout the wavelength band, and specifically, the reflectivity has a significant increasing trend in the long wavelength band.

[0071] Figure 9 This is a perspective view showing an exemplary lens assembly. Figure 10 and Figure 11 This is a cross-sectional view illustrating an example of multiple lenses implemented in an exemplary lens assembly.

[0072] Reference Figure 9 The lens assembly 500 may include at least one lens 301-304. In a non-limiting example, the lens assembly 500 may include four lenses 301, 302, 303, and 304, and the number of lenses 301-304 or the shape of each lens 301-304 may vary depending on implementation or size requirements. In addition to the plurality of lenses 301-304, the lens assembly 500 may also include a lens barrel 350 having a lens aperture 350h. The lens barrel 350 may have a hollow cylindrical shape, and the light-transmitting lens aperture 350h may be formed through one surface of the lens barrel 350. At least one lens 301 of the plurality of lenses 301-304 may implement the low-reflection lens described in the foregoing examples. That is, as... Figure 9As shown, a low-reflection lens 301 can be formed on the lens unit, and the first surface S1 and the second surface S2 of the low-reflection lens 301 can each include a serrated layer 120, which includes a plurality of particles dispersed therein.

[0073] In the example, among the multiple lenses 301-304, the low-reflection lens 301 can be positioned on the outermost side of the lens assembly 500 on the light incident side (i.e., in the optical axis direction (X direction in the figure)). Since the reflectivity and durability of the lens 301 positioned on the outermost side among the multiple lenses 301-304 can greatly affect the overall reflectivity and durability of the lens assembly 500, as in the example, by implementing the reflective lens 301 on the outermost side of the lens assembly 500, the effect of reducing the reflectivity of the lens assembly 500 and further improving its durability can be improved.

[0074] Reference Figure 10 If necessary, the reflectivity of the lens assembly 500 can be further reduced by implementing a greater number of low-reflection lenses in the lens assembly 500. That is, multiple low-reflection lenses 301 and 302 can be provided, and in this example, the multiple low-reflection lenses 301 and 302 can be arranged on the outermost side of the lens assembly 500 in the optical axis direction.

[0075] Reference Figure 11 In the low-reflection lens 301, the serrated layer 120 may be formed on the first surface S1, but may not be formed on the second surface S2. In this example, the low-reflection lens 301 may be configured such that the second surface S2 without the serrated layer 120 may be located on the outer side in the optical axis direction (X direction). That is, the second surface S2 without the serrated layer 120 may be located on the outermost side, and therefore, the structural stability of the lens assembly 500 may be further improved.

[0076] Figure 12 and Figure 13 This is a perspective view illustrating an exemplary mobile electronic device, showing the front and rear of the exemplary mobile electronic device, respectively. Figure 14 and Figure 15 It is shown Figure 12 and 13 The image shows a magnified cross-sectional view of the area surrounding the lens assembly. In this example, the mobile electronic device 600 can be provided in the form of various electronic devices, such as, but not limited to, smartphones, tablet PCs, and laptop PCs, and in this example, a smartphone will be used as an example for description.

[0077] Mobile electronic device 600 may include a display 601, a first lens assembly 611, and a second lens assembly 612 as main components. However, if desired, only one of the first lens assembly 611 and the second lens assembly 612 may be implemented. Other main components included in mobile electronic device 600 (e.g., processing devices, communication devices, touch sensors, etc.) may use conventionally implemented components, and their detailed descriptions will not be provided.

[0078] The first lens assembly 611 and the second lens assembly 612 may have a reference Figure 9 The described structure, and specifically, refer to Figure 14 In addition to the plurality of lenses 701, 702, 703, and 704, the first lens assembly 611 may also include a lens barrel 750 having a lens aperture 750h. At least one of the plurality of lenses 701-704 (e.g., lens 701) may realize a low-reflection lens according to the foregoing example. That is, the low-reflection lens 701 may be formed on the lens unit, and the first surface S1 and the second surface S2 of the low-reflection lens 701 may each include a serrated layer 120 comprising a plurality of particles dispersed therein. In this example, among the plurality of lenses 701-704, the low-reflection lens 701 may be disposed on the outermost side of the first lens assembly 611 in the direction of light incident (i.e., the optical axis direction (Z direction in the figure)).

[0079] Similarly, refer to Figure 15 In addition to the plurality of lenses 801, 802, 803, and 804, the second lens assembly 612 may also include a lens barrel 850 having a lens aperture 850h. At least one of the plurality of lenses 801-804 can realize the low-reflection lens described in the foregoing example. That is, the low-reflection lens 801 can be formed on the lens unit, and the first surface S1 and the second surface S2 of the low-reflection lens 801 can each include a serrated layer 120, which includes a plurality of particles dispersed therein. In this example, among the plurality of lenses 801-804, the low-reflection lens 801 can be disposed on the outermost side of the second lens assembly 612 in the direction of light incident (i.e., in the optical axis direction (Z direction in the figure)).

[0080] As shown in the figure, the first lens assembly 611 can be covered by the display 601, and in this example, the first lens assembly 611 can be covered by a tempered glass portion of the display 601. However, when the tempered glass covers the first lens assembly 611, the tempered glass may not need to be part of the display 601. When the first lens assembly 611 is covered by the display 601 as described above, the amount of light incident on the lens may be reduced, causing the reflectivity of the first lens assembly 611 to potentially significantly affect the performance of the camera module.

[0081] In other words, for the front of the mobile electronic device 600, the first lens assembly 611 can be covered by a display 601, which corresponds to an under-display camera (UDC) structure. Although the UDC structure reduces the processing of the camera aperture, the amount of light incident on the camera may be reduced because additional tempered glass can be placed on the camera to implement the UDC structure, which may lead to performance degradation. Therefore, when the reflectivity of the lens is high in the UDC structure, the performance of the camera module may be significantly reduced, and as in the example, by placing a low-reflectivity lens 701 on the incident side, i.e., closest to the display 601, the effect of reducing the reflectivity of the first lens assembly 611 can be increased, and therefore, the performance of the camera module including the first lens assembly 611 can be improved. Meanwhile, in the aforementioned example, the first lens assembly 611 can be covered by the display 601. However, in the exemplary embodiment, the second lens assembly 612 can also be covered by an optical element (i.e., tempered glass) that may cause a loss of light, and in this case, the effect of reducing the reflectivity of the second lens assembly 612 may be important. Besides... Figure 9 In addition to the exemplary implementations in, Figure 10 and Figure 11 The structure of the lens assembly 500 can also be applied to the mobile electronic devices described in the aforementioned examples.

[0082] According to the foregoing exemplary embodiments, the lens may include a reflective layer having low reflectivity and excellent durability, thereby reducing flare.

[0083] While this disclosure includes specific examples, it will be apparent upon understanding the disclosure of this application that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be understood in a descriptive sense only and not for limiting purposes. The description of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Suitable results may still be achieved if the described techniques are performed with components in the described system, architecture, device, or circuit having different orders, and / or if components are combined in different ways and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of this disclosure is not limited by the specific embodiments but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in this disclosure.

Claims

1. A lens, comprising: Lens unit; as well as A serrated layer is disposed on at least a portion of the surface of the optical region including the optical axis of the lens unit. The serrated layer comprises multiple particles dispersed within it. The serrated layer has a nano-serrated structure and is optically transparent. The serrated layer includes a porous structure. The serrated layer comprises at least one of Al2O3 and SiO2, and The plurality of particles include ZrO2 particles.

2. The lens as claimed in claim 1, wherein, The serrated layer comprises multiple conical structures with different sizes.

3. The lens as claimed in claim 1, wherein, The serrated layer comprises an irregularly shaped serrated structure.

4. The lens as claimed in claim 1, wherein, The plurality of particles include nanoparticles.

5. The lens as claimed in claim 1, further comprising: An adhesive layer is disposed between the lens unit and the serrated layer.

6. The lens as claimed in claim 5, wherein, The adhesive layer comprises at least one of SiO2, TiO2, and silane compounds.

7. The lens as claimed in claim 1, wherein, The lens unit and the serrated layer are configured to be integrated with each other.

8. Lens assembly, including: A lens unit, comprising at least one lens, At least one of the at least one lenses is configured as a low-reflection lens. In this embodiment, a serrated layer is disposed on at least a portion of the surface of the optical region including the optical axis of the lens unit, the serrated layer comprising a plurality of particles dispersed in the serrated layer. The serrated layer has a nano-serrated structure and is optically transparent. The serrated layer includes a porous structure. The serrated layer comprises at least one of Al2O3 and SiO2, and The plurality of particles include ZrO2 particles.

9. The lens assembly as claimed in claim 8, wherein, The low-reflection lens is disposed on the outermost side of the lens assembly in the optical axis direction among the at least one lens.

10. The lens assembly of claim 9, wherein, The low-reflection lens includes a first surface and a second surface opposite to the first surface, and the serrated layer is disposed on the first surface but not on the second surface.

11. The lens assembly of claim 10, wherein, The low-reflection lens is configured such that the second surface is located on the outside of the lens assembly in the optical axis direction.

12. The lens assembly of claim 8, further comprising a plurality of the low-reflection lenses, wherein the plurality of the low-reflection lenses are disposed on the outermost side of the lens assembly in the optical axis direction among the at least one lens.

13. Mobile electronic devices, including: monitor; as well as Lens assembly, The lens assembly includes a lens unit, and the lens unit includes at least one lens. At least one of the at least one lenses is configured as a low-reflection lens. In this embodiment, a serrated layer is disposed on at least a portion of the surface of the optical region including the optical axis of the lens unit, the serrated layer comprising a plurality of particles dispersed in the serrated layer. The serrated layer has a nano-serrated structure and is optically transparent. The serrated layer includes a porous structure. The serrated layer comprises at least one of Al2O3 and SiO2, and The plurality of particles include ZrO2 particles.

14. The mobile electronic device as claimed in claim 13, wherein, The low-reflection lens is disposed on the outermost side of the lens assembly in the optical axis direction of at least one lens.

15. The mobile electronic device as claimed in claim 13, wherein, The lens assembly is covered by the display.

16. The mobile electronic device of claim 15, wherein, The lens assembly is covered by the tempered glass portion of the display.

17. A lens assembly, comprising: Multiple lenses; At least one of the plurality of lenses is configured as a low-reflection lens. The low-reflection lens includes a first uneven layer disposed on a first surface of an optical region including an optical axis and a second uneven layer disposed on a second surface of the optical region. The low-reflection lens is located on the outermost side of the lens assembly on the light incident side among the plurality of lenses. The first and second uneven layers have a nano-serrated structure and are optically transparent. The serrated structure includes a porous structure. The serrated structure includes at least one of Al2O3 and SiO2. The first uneven layer and the second uneven layer comprise a plurality of ceramic particles, and The plurality of particles include ZrO2 particles.

18. The lens assembly of claim 17, wherein, The first uneven layer and the second uneven layer are configured to have a stepped structure or a serrated structure.

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