WO2021227778A1 - Lentille pour lumière d'appoint, module de lampe d'appoint, ensemble objectif et dispositif électronique - Google Patents

Lentille pour lumière d'appoint, module de lampe d'appoint, ensemble objectif et dispositif électronique Download PDF

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Publication number
WO2021227778A1
WO2021227778A1 PCT/CN2021/087949 CN2021087949W WO2021227778A1 WO 2021227778 A1 WO2021227778 A1 WO 2021227778A1 CN 2021087949 W CN2021087949 W CN 2021087949W WO 2021227778 A1 WO2021227778 A1 WO 2021227778A1
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WIPO (PCT)
Prior art keywords
lens
light
fill
view
field
Prior art date
Application number
PCT/CN2021/087949
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English (en)
Chinese (zh)
Inventor
陈传书
石昌寿
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华为技术有限公司
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Publication date
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Publication of WO2021227778A1 publication Critical patent/WO2021227778A1/fr

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the embodiments of the present application relate to the technical field of electronic equipment, and in particular to a light-filling lens, a light-filling lamp module, a lens assembly, and an electronic device.
  • the lens is often paired with a fill light module, and the fill light module is used to fill the field of view of the lens, so that the lens can also capture clear images in low-illuminance scenes.
  • Fill light modules can be classified according to the bright way: basic lighting and accent lighting.
  • Basic lighting is ambient lighting, which refers to the comprehensive basic lighting in the entire scene.
  • the main problem of basic lighting used for supplementary light is low optical efficiency.
  • Accent lighting refers to the targeted lighting of specific parts of the scene.
  • the lens generally has a specific shooting area. Under the guidance of the concept of high efficiency, energy saving, low light pollution and environmental protection, the accent lighting fill light module with higher optical efficiency is in the electronic
  • the application on the device is an inevitable trend.
  • Some lenses have barrel or pincushion distortion at the edge of the shooting field of view, that is, the field of view of the lens is generally barrel or pincushion.
  • Most of the existing fill light modules are circular lighting areas, and a few are elliptical or rectangular lighting areas.
  • FIG. 1 shown in FIG. 1 is a schematic diagram of the positions of the fill light range of the existing fill light module and the field of view range of the lens. Among them, the circular area enclosed by the solid line is the fill light range of the fill light module, and the pincushion area enclosed by the dotted line is the field of view range of the lens.
  • the application provides a light supplement lens, a light supplement lamp module, a lens assembly and electronic equipment.
  • the supplementary light module can form a supplementary light range that matches the field of view of the lens of the electronic device, thereby reducing the energy waste of the supplementary light module and reducing the hardware power consumption of the electronic device.
  • the present application provides a light supplement lens, which is used with a light source to supplement light in the field of view of the lens.
  • the light-filling lens includes a first surface and a second surface that are opposed to each other, and a peripheral surface connected between the first surface and the second surface.
  • the peripheral surface is a reflective surface for reflecting the light emitted by the light source;
  • the size of the cross section perpendicular to the optical axis of the fill lens in the first direction is the first size
  • the size of the second surface in the first direction is the third size
  • the field of view of the lens is in the first direction.
  • the size in one direction is the second size
  • the first size is negatively related to the second size
  • the third size is negatively related to the second size.
  • the negative correlation is a change in the opposite direction.
  • the first size is negatively related to the second size, that is, as the first direction changes, the larger the second size, the smaller the first size.
  • the third size is negatively related to the second size, that is, as the first direction changes, the larger the second size, the smaller the third size.
  • the optical axis of the fill light lens refers to the center line of the fill light lens, and the direction of light entering the fill light lens along the optical axis of the fill light lens does not change when it exits.
  • the first direction is a direction that forms a first angle with the direction of the vertical field of view of the lens, and when the first direction changes, the first angle changes.
  • the first size of the cross section of the fill lens is negatively related to the second size of the lens's field of view
  • the third size of the second surface of the fill lens is The size is negatively related to the second size of the field of view of the lens, so that the light fill range emitted after the light fill lens is basically the same as the field of view of the lens, so as to avoid the waste of energy of the fill light module.
  • the field of view of the lens is pincushion-shaped
  • the fill lens is obtained according to the design corresponding to the field of view of the pincushion lens, so that the first size of the cross-section of the fill lens is equal to that of the lens's field of view.
  • the second dimension is negatively correlated
  • the third dimension of the second surface is also negatively correlated with the second dimension of the field of view of the lens, so that the light fill range emitted by the light fill lens is also corresponding to the field of view of the lens Pillow shape to avoid the waste of energy of the fill light module.
  • the fill light range of the fill light module is basically the same as the field of view range of the lens, or the fill light range of the fill light module is slightly larger than the field of view range of the lens, and the field of view range of the lens is located in the fill light. It is within the fill light range of the module, so as to ensure that the fill light module can fill the field of view of the lens, and try to avoid the waste of energy of the fill light module.
  • the field of view of the lens is rectangular, pincushion or barrel-shaped
  • the second surface is rhomboid-like or square-like
  • the cross section of the fill lens perpendicular to the optical axis of the fill lens is also It is rhombus-like or square-like
  • the first surface is round, elliptical, rhombus-like or square-like
  • the peripheral surface transitionally connects the first surface and the second surface, that is, the light fill lens is perpendicular to
  • the cross section of the optical axis of the fill lens gradually changes from the same shape as the first surface to the same shape as the second surface in the direction from the first surface to the second surface.
  • the designed fill lens is perpendicular to the optical axis of the fill lens
  • the cross-section and the second surface are rhombus-like or square-like.
  • the field of view of any lens module is close to the optical axis of the lens module and there is almost no distortion, that is, the paraxial light of the lens module can almost be transformed into an image, so the field of view
  • the optical axis area is suitable for circular or rectangular fill light; the farther the field of view of the lens module is from the optical axis of the lens module, the greater the distortion and distortion, that is, the farther away the lens module is from the optical axis of the lens module.
  • the larger the imaging distortion (barrel distortion or pincushion distortion) is, therefore, it is more suitable to use pillow fill light or barrel fill light for areas far from the optical axis of the lens module.
  • the optical axis of the lens module refers to the center line of the lens module, and the direction of the light rays entering the lens module along the optical axis of the lens module does not change when it exits.
  • the first surface may be set to be circular or elliptical
  • the second surface may be set to be rhombus-like or square-like
  • the peripheral surface is transitionally connected to the first surface and the second surface, so that The illuminance distribution in the fill light area can correspond to the different distortion degrees of different positions in the field of view of the lens module, so as to meet the fill light needs of different positions in the field of view of the lens module, so that the fill light can be more Evenly.
  • the first face is recessed with a receiving cavity in the direction of the second surface, the receiving cavity is used for receiving the light source;
  • the receiving cavity includes a bottom wall surface and a peripheral wall surface, the peripheral wall surface is connected to the The bottom wall surface and the first surface;
  • the second surface is a flat surface, the distance from the boundary of the bottom wall surface in the first direction to the second surface is a first distance, and the first distance is The second dimension is positively correlated.
  • the positive correlation is a change in the same direction.
  • the first distance is positively correlated with the second size, that is, as the first direction changes, the larger the second size, the larger the first distance.
  • the structure of the bottom wall surface of the corresponding accommodating cavity is obtained according to the field of view of the lens, so that the light enters and passes through the bottom wall surface of the fill lens.
  • the fill light range formed after the second surface emits light can also be basically the same shape as the field of view of the corresponding lens, and the light enters through the bottom wall surface of the fill lens, and the fill light range formed after the second surface emits light can be Covers the field of view of the corresponding lens, so as to ensure that the fill light module including the fill lens can fill light for each position within the lens's field of view, and at the same time further improve the fill light including the fill lens
  • the light energy utilization rate of the lamp module can further reduce the stray light outside the field of view of the lens module and reduce light pollution.
  • the receiving cavity is in the shape of a truncated cone or an ellipse, and the opening area of the receiving cavity is larger than the area of the orthographic projection of the bottom wall surface of the receiving cavity on the first surface.
  • the orthographic projection of the bottom wall surface of the containing cavity on the first surface is the projection of the bottom wall surface of the containing cavity on the first surface when the light parallel to the central axis of the containing cavity irradiates the bottom wall surface of the containing cavity.
  • the opening area of the accommodating cavity is larger than the area of the orthographic projection of the bottom wall surface of the accommodating cavity on the first surface, so that the accommodating cavity has a draft inclination, which is convenient for demolding and other operations when making a light supplement lens through a mold.
  • the receiving cavity When the receiving cavity is in the shape of a truncated cone or ellipse, it can ensure that the light path of the light entering the fill light lens through the bottom wall of the containing cavity and the light reflected by the peripheral surface of the fill light lens can be decoupled from each other, thereby making the fill light
  • the lamp module has a higher degree of freedom in the size and shape of the target fill light range, which reduces design variables, so that the required fill light module can be easily and accurately designed to obtain the shape and size of the target fill light range.
  • the light-filling lens includes a light-reflective housing and a light-emitting lens
  • the inner surface of the light-reflective housing is the peripheral surface
  • the plane enclosed by the bottom contour of the light-reflective housing is the second surface.
  • the plane enclosed by the top profile of the reflective housing is the first surface; the light-emitting lens is fixed on the side of the reflective housing close to the first surface, and part of the light from the light source is emitted through the light-emitting lens, Part of the light exits after being reflected by the reflective shell.
  • the inner surface of the reflective housing is the peripheral surface
  • the plane enclosed by the bottom contour of the reflective housing is the second surface
  • the plane enclosed by the top contour of the reflective housing is the first surface.
  • the surface, that is, the cross section of the reflective housing perpendicular to the optical axis of the fill lens and the size of the second surface in the first direction are negatively related to the second dimension, so that the light reflected by the reflective housing of the fill lens can be emitted.
  • the fill light range is basically the same as the field of view of the lens, avoiding the waste of energy of the fill light module.
  • the edge thickness of the light exit lens in the first direction is a first thickness
  • the first thickness is positively correlated with the second size.
  • the fill light range formed by the light entering the light exit lens after exiting can be basically the same shape as the field of view of the corresponding lens, and the fill light range formed after the light entering the light exit lens exits can basically cover its corresponding lens This ensures that the fill light module including the fill light lens can fill light for each position within the lens's field of view, and at the same time further improves the light of the fill light module including the fill light lens. Energy utilization, and further reduce the stray light outside the field of view of the lens module, and reduce light pollution.
  • the surface of the light-emitting lens facing the first surface is a curved surface, and the surface away from the first surface is a flat surface, so that the edge thickness of the light-emitting lens in the first direction is the same as the second dimension.
  • the surface of the light-emitting lens facing the second surface is a curved surface, and the surface away from the second surface is a flat surface, so that the edge thickness of the light-emitting lens in the first direction is equal to that of the second surface.
  • the size is positively correlated.
  • the first direction includes at least a vertical field of view direction of the lens, a horizontal field of view direction of the lens, and a diagonal field of view direction of the lens.
  • the first included angle is any value
  • the first direction is a direction at any included angle with the vertical field of view of the lens
  • the peripheral surface is a continuous curved surface, so that the fill light
  • the fill light area of the module can more accurately correspond to the field of view of the lens, so that the fill light module can achieve higher light utilization, reduce energy waste, and more reduce the field of view of the lens. Stray light.
  • the present application also provides another light-filling lens for cooperating with the light source to fill the field of view of the lens.
  • the light-filling lens includes a first surface and a second surface that are opposed to each other, and is connected to The peripheral surface between the first surface and the second surface, the peripheral surface is a reflective surface for reflecting light emitted by the light source; the second surface is a light-emitting surface, and the first surface is A receiving cavity is recessed in the direction of the second surface, and the receiving cavity is used for receiving the light source; the receiving cavity includes a bottom wall surface and a peripheral wall surface, and the peripheral wall surface connects the bottom wall surface and the first surface;
  • the second surface is a plane, and the distance from the boundary of the bottom wall surface in the first direction to the second surface is the first distance; the size of the field of view of the lens in the first direction is The second dimension, the first distance is positively related to the second dimension.
  • the structure of the bottom wall surface of the corresponding accommodating cavity is obtained according to the field of view of the lens, so that the light enters and passes through the bottom wall surface of the fill lens.
  • the fill light range formed after the second surface emits light can also have the same shape as the corresponding lens's field of view range, and the fill light range formed after the light enters the bottom wall of the fill lens and exits through the second surface can cover
  • the corresponding field of view of the lens so as to ensure that the fill light module including the fill lens can fill light for each position within the lens's field of view, and at the same time further improve the fill light including the fill lens
  • the light energy utilization rate of the module can further reduce the stray light outside the field of view of the lens module and reduce light pollution.
  • the accommodating cavity is in the shape of a truncated cone or an ellipse, and the opening area of the accommodating cavity is larger than the area of the orthographic projection of the bottom wall surface of the accommodating cavity on the first surface.
  • the opening area of the accommodating cavity is larger than the area of the orthographic projection of the bottom wall surface of the accommodating cavity on the first surface, so that the accommodating cavity has a draft inclination, which is convenient for demolding and other operations when making a light supplement lens through a mold.
  • the receiving cavity When the receiving cavity is in the shape of a truncated cone or ellipse, it can ensure that the light path of the light entering the fill light lens through the bottom wall of the containing cavity and the light reflected by the peripheral surface of the fill light lens can be decoupled from each other, thereby making the fill light
  • the lamp module has a higher degree of freedom in the size and shape of the target fill light range, which reduces design variables, so that the required fill light module can be easily and accurately designed to obtain the shape and size of the target fill light range.
  • the light-filling lens includes a light-reflective housing and a light-emitting lens
  • the inner surface of the light-reflective housing is the peripheral surface
  • the plane enclosed by the bottom contour of the light-reflective housing is the second surface.
  • the plane enclosed by the top profile of the reflective housing is the first surface; the light-emitting lens is fixed on the side of the reflective housing close to the first surface, and the light-emitting lens and the reflective housing are close to the first surface.
  • a part of one side encloses the receiving cavity, and the side of the light-emitting lens away from the receiving cavity is a flat surface.
  • the light-emitting lens and the portion of the reflective housing close to the first surface enclose the containing cavity, that is, the surface of the light-emitting lens facing the containing cavity is the bottom wall surface of the containing cavity. Since the first distance from the boundary in the first direction to the second surface of the light-emitting lens facing the accommodating cavity is positively correlated with the second dimension, the first distance is positively correlated with the second dimension according to the corresponding relationship of the lens
  • the field of view is obtained from the structure of the bottom wall surface of the corresponding housing cavity, so that the light fills the light through the bottom wall of the fill lens and exits through the second surface to form a fill light range that corresponds to the shape of the lens's field of view.
  • the fill light range formed after the light enters the bottom wall surface of the fill light lens and exits through the second surface can cover the field of view of the corresponding lens, thereby ensuring the fill light module including the fill light lens It can fill light for each position in the field of view of the lens, and at the same time further improve the light energy utilization rate of the fill light module including the fill light lens, and further reduce the stray light outside the field of view of the lens module , Reduce light pollution.
  • the first direction includes at least a vertical field of view direction of the lens, a horizontal field of view direction of the lens, and a diagonal field of view direction of the lens.
  • the first included angle is any value
  • the first direction is a direction at any included angle with the vertical field of view of the lens
  • the bottom wall surface is a continuous curved surface, so that the fill light
  • the fill light area of the module can more accurately correspond to the field of view of the lens, so that the fill light module can achieve higher light utilization, reduce energy waste, and more reduce the noise outside the field of view. Light.
  • the present application provides a supplementary light module for supplementing light for the field of view of the lens.
  • the supplementary light module includes a light source and the above-mentioned supplementary lens, and the light source is fixed to the supplementary light.
  • One side of the first surface of the optical lens; the field of view of the lens is within the fill light range of the fill light module, and the shape of the fill light range of the fill light module is the same as that of the lens
  • the shape of the field of view is the same.
  • the shape of the fill light range of the fill light module and the shape of the field of view of the lens may be the same as: the shape of the fill light range of the fill light module is the same as the shape of the lens.
  • the shape of the field of view is exactly the same or there are some slight deviations.
  • the light supplement lens can reflect or refract the light generated by the light source, so that the light emitted by the light source is emitted by the light supplement lens to form a supplement light range with substantially the same shape and size as the field of view of the lens, that is,
  • the field of view range of the lens is within the fill light range of the fill light module, and the shape of the fill light range of the fill light module is basically the same as that of the lens, so that the fill light
  • the lamp module can more accurately fill the field of view of the lens, achieve higher light utilization, reduce energy waste, and can reduce stray light outside the field of view of the lens, and reduce light pollution.
  • the present application also provides a lens assembly that includes a lens module and a fill light module;
  • the lens module includes a photosensitive element and a lens, and the light reflected from the surface of the scene to be imaged passes through the lens Imaging on the photosensitive element;
  • the fill light module includes a light source and the above fill light lens, the light source is fixed on one side of the first surface of the fill light lens;
  • the fill light module is used To fill light for the field of view range of the lens, the field of view range of the lens is located within the fill light range of the fill light module, and the shape of the fill light range of the fill light module is the same as that of the The shape of the field of view of the lens is basically the same, so that the fill light module can more accurately fill the field of view of the lens to achieve higher light utilization, thereby reducing the energy waste of the lens assembly, and can reduce Stray light outside the field of view of the lens reduces light pollution.
  • the shape of the fill light range of the fill light module and the shape of the field of view of the lens may be the same as: the shape of the fill light range of the fill light module is the same as the shape of the lens.
  • the shape of the field of view is exactly the same or there are some slight deviations.
  • the present application also provides an electronic device that includes a processor and the aforementioned lens assembly.
  • the photosensitive element of the lens assembly is used to detect the illuminance of the field of view of the lens.
  • the illuminance of the field of view of the lens controls the fill light module, so as to realize the automatic adjustment of the fill light module, so that the electronic device can shoot better images in different usage scenarios.
  • the electronic device further includes a photosensitive sensor for detecting the illuminance of the environment in which the electronic device is located, and the processor is used for detecting the illuminance of the field of view of the lens and the electronic The illuminance of the environment where the equipment is located controls the fill light module.
  • the processor is used to control the fill light module according to the illuminance of the field of view of the lens and the illuminance of the environment in which the electronic device is located, so that the illuminance within the field of view of the lens can be more controlled. Accurate.
  • the electronic device further includes a memory
  • the processor is configured to store the imaging of the lens module in the memory by controlling, so as to facilitate the subsequent review of the imaging of the lens module.
  • FIG. 1 is a schematic diagram of the positions of the fill light range of the existing fill light module and the field of view range of the lens;
  • FIG. 2 is an exploded schematic diagram of a partial structure of an electronic device according to an embodiment of the present application.
  • FIG. 3 is a schematic cross-sectional view of the lens module in FIG. 2 along the optical axis direction of the lens module;
  • FIG. 4 is a schematic cross-sectional view of the fill light module in FIG. 2 along the optical axis direction of the fill light module;
  • FIG. 5 is a schematic diagram of the structure of the light supplement lens shown in FIG. 2;
  • FIG. 6 is a view from the first surface to the second surface of the fill lens shown in FIG. 5;
  • FIG. 7 is a schematic diagram of the position of the field of view range of the lens of the electronic device of the embodiment shown in FIG. 2 and the position of the fill light range of the fill light module;
  • 8a and 8b are schematic diagrams of the principle of the light-filling range formed by the light-filling lens shown in FIG. 5;
  • FIG. 9 is a schematic cross-sectional view of the fill light lens shown in FIG. 5 perpendicular to the optical axis of the fill light lens;
  • FIG. 10 is a schematic diagram of the field of view range of the lens of the electronic device shown in FIG. 2;
  • FIG. 11 is a schematic diagram of the structure of a supplementary lens according to another embodiment of the present application.
  • FIG. 12 is a schematic cross-sectional view of a light supplement lens in another embodiment of the present application along the optical axis direction of the light supplement lens;
  • FIG. 13 is a view from the first surface to the second surface of the fill lens shown in FIG. 12;
  • FIGS. 14a and 14b are schematic diagrams of the light fill range after passing through the first part of the fill light lens shown in FIG. 12;
  • FIG. 15 is a schematic diagram of the structure of the first part of the fill lens shown in FIG. 14a;
  • FIG. 16 is a schematic structural diagram of the first part of a light supplement lens according to another embodiment of the present application.
  • FIG. 17 is a schematic diagram of the structure of a light supplement lens according to another embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of a supplementary light module according to another embodiment of the present application.
  • FIG. 19 is a schematic diagram of the structure of the fill light lens shown in FIG. 18;
  • FIG. 20 is a shape diagram of the field of view range under different focal lengths of the zoom lens
  • FIG. 21 is a schematic structural diagram of a supplementary light module according to another embodiment of this application.
  • FIG. 22 is a schematic structural diagram of an electronic device according to an embodiment of this application.
  • Figure 23 is a flow chart of the processor controlling the turn-on or turn-off of the fill light module
  • FIG. 24 is a flow chart of the processor to adjust the brightness of the fill light of the fill light module or dim the brightness of the fill light of the fill light module.
  • the present application provides an electronic device that includes a lens module and a light supplement lamp module.
  • the light supplement light module is used to supplement light for the field of view of the lens module, so that the lens module can achieve better illuminance. It can still have better shooting results in low scenes.
  • the electronic device can be a mobile phone, a tablet, a computer, a camera, a monitoring device, a driving recorder and other devices with shooting functions.
  • FIG. 2 shows an exploded schematic diagram of a partial structure of an electronic device 1000 according to an embodiment of the present application.
  • the electronic device 1000 is a monitoring device.
  • This application uses a monitoring device as an example to describe the electronic device 1000.
  • the electronic device 1000 includes a lens assembly, and the lens assembly includes a lens module 100 and a fill light module 200 corresponding to the lens module 100.
  • the fill light module 200 is used to fill the field of view of the lens module 100.
  • FIG. 3 is a schematic cross-sectional view of the lens module 100 in FIG. 2 along the direction of the optical axis a of the lens module 100.
  • the optical axis a of the lens module 100 refers to the center line of the lens module 100, and the direction of the light rays entering the lens module 100 along the optical axis a does not change when emitted.
  • the lens module 100 includes a lens 10 and a photosensitive element 20.
  • the lens 10 includes a plurality of lenses 11 arranged coaxially. Wherein, the optical axis of each lens 11 is collinear with the optical axis a of the lens module 100, where the optical axis of the lens 11 refers to the center line of the lens 11, along the optical axis of the lens 11.
  • the photosensitive element 20 is located on the image side of the lens 10.
  • the image side of the lens 10 refers to the imaging side of the lens 10 close to the scene to be imaged.
  • the photosensitive element 20 is a semiconductor chip with hundreds of thousands to millions of photodiodes on its surface, which generate electric charges when irradiated by light, thereby converting optical signals into electrical signals.
  • the photosensitive element 20 may be any device capable of converting optical signals into electrical signals.
  • the photosensitive element 20 may be a charge coupled device (CCD) or a complementary metal-oxide conductor device (CMOS).
  • CCD charge coupled device
  • CMOS complementary metal-oxide conductor device
  • the photosensitive element 20 is rectangular, and its center is located on the optical axis of the lens 10.
  • the optical axis of the lens 10 is the optical axis of the multiple lenses 11 in the lens 10, and the optical axis of the lens 10 is collinear with the optical axis a of the lens module 100.
  • the lens module 100 has a vertical field of view direction and a horizontal field of view direction.
  • the vertical field of view direction of the lens module 100 is perpendicular to the long side of the photosensitive element 20, and the horizontal field of view direction of the lens module 100 is perpendicular to that of the photosensitive element 20. Short side, so that a rectangular image can be obtained through the lens module 100.
  • the photosensitive element 20 may also have other shapes according to actual needs, so as to obtain images of different shapes.
  • the photosensitive element 20 may also have a shape such as a square or a circle.
  • the lens 10 further includes a diaphragm 12, and the diaphragm 12 may be disposed on the object side of the plurality of lenses 11, or between the lenses 11 close to the object side of the plurality of lenses 11.
  • the diaphragm 12 may be located between the first lens and the second lens near the object side, or between the second lens and the third lens near the object side of the plurality of lenses 11.
  • the diaphragm 12 may be an aperture diaphragm 12, and the aperture diaphragm 12 is used to limit the amount of light entering to change the brightness of the imaging.
  • the lens 10 further includes an electromagnetic/motor filter switch (IR-cut removable, ICR).
  • ICR electromagnetic/motor filter switch
  • the ICR is located between the photosensitive element 20 and the lens 11 of the lens 10. In the case of sufficient light (such as daytime), the ICR will automatically install an infrared filter between the photosensitive element 20 and the lens 11 of the lens 10. The light refracted by each lens 11 of the lens 10 irradiates the infrared filter 30 and is transmitted to the photosensitive element 20 through the infrared filter 30.
  • the infrared filter 30 can filter out unnecessary light projected on the photosensitive element 20, prevent the photosensitive element 20 from generating false colors or ripples, so as to improve its effective resolution and color reproduction, so that the lens 10 can monitor in a color mode.
  • ICR In low illuminance (such as night or extremely low light conditions), ICR can automatically remove the infrared filter, so that the lens 10 can automatically switch to black and white mode for monitoring, so as to ensure that the lens 10 can be used in any illuminance scene working.
  • the lens 10 further includes a lens barrel 10a, and a plurality of lenses 11 of the lens 10 are fixed in the lens barrel 10a.
  • a plurality of lenses 11 are fixed in the lens barrel 10a, the distance between the lenses 11 is fixed, and the lens 10 is a lens with a fixed focal length.
  • the multiple lenses 11 of the lens 10 can be relatively moved within the lens barrel 10a to change the distance between the multiple lenses 11, so that the focal length of the lens 10 can be changed, and the lens 10 can be changed. Zoom and focus.
  • the ICR may be fixed to the end of the lens barrel 10 a close to the image side of the lens 10.
  • the lens module 100 further includes a holder 50, a circuit board 60 and other structures.
  • the fixed base 50 includes a fixed barrel 51, and the lens 10 is accommodated in the fixed barrel 51 of the fixed base 50 and fixed relative to the fixed barrel 51.
  • the circuit board 60 is fixed on the side of the fixed base 50 away from the lens 10.
  • the circuit board 60 is used to transmit electrical signals.
  • the circuit board 60 may be a flexible printed circuit (FPC) or a printed circuit board (printed circuit board, PCB), where the FPC may be a single-sided flexible board, a double-sided flexible board, a multilayer flexible board, or a rigid flexible board Or mixed-structure flexible circuit boards, etc.
  • FPC flexible printed circuit
  • PCB printed circuit board
  • the ICR may be fixed to the cylinder wall of the fixed cylinder 51 of the fixed base 50. It can be understood that, in some embodiments, the ICR may also be supported and fixed on the circuit board 60 by a bracket.
  • the photosensitive element 20 is fixed on the circuit board 60 by bonding or bonding.
  • the photosensitive element 20 is located on the image side of the lens 10 and is disposed opposite to the lens 10; the photosensitive element 20 is located on the focal plane of the lens 10, and the optical image generated by the lens 10 can be projected to the photosensitive element 20.
  • the photosensitive element 20 is connected to other components of the electronic device 1000 through the circuit board 60, so as to realize the communication connection between the photosensitive element 20 and other components of the electronic device 1000.
  • the electronic device 1000 further includes components such as a processor and a memory.
  • components such as a processor and a memory can also be integrated on the circuit board 60 by bonding or patching, so that the communication connection between the photosensitive element 20, the processor, the memory and the like is realized through the circuit board 60.
  • the photosensitive element 20 can convert the optical image into an electrical signal and transmit it to the processor.
  • the processor is used to process the electrical signal of the image to get a better picture or image.
  • the processor stores the captured images or images obtained after processing into the memory.
  • the lens 10 can be retractably accommodated in the fixed barrel 51 of the fixed base 50 so as to change the distance between the lens 10 and the photosensitive element 20.
  • the distance between the multiple lenses 11 in the lens 10 is adjustable. As the distance between the multiple lenses 11 in the lens 10 changes, the focal length of the lens 10 will change, correspondingly The lens 10 is moved relative to the fixed base 50, thereby changing the distance between the photosensitive element 20 and the lens 10, ensuring that the photosensitive element 20 is always located on the focal plane of the lens 10, and ensuring that the focal length of the lens 10 is arbitrarily changed. Always get better imaging.
  • the lens 10 can be contracted relative to the fixed base 50 so that one end of the lens 10 is close to the photosensitive element 20; when the camera module 100 is working, the lens 10 is fixed to the base 50 The extension is carried out so that one end of the lens 10 is far away from the photosensitive element 20 until the photosensitive element 20 is located on the focal plane of the lens 10. That is, by extending and retracting the lens 10 relative to the fixed base 50 in different usage scenarios, it is possible to reduce the size of the lens module 100 as much as possible while ensuring the shooting effect, so that the lens module 100 can be more suitable for miniaturization and thinness. ⁇ 1000 ⁇ The electronic device 1000.
  • FIG. 4 is a schematic cross-sectional view in the direction of the optical axis b of the fill light module 200 in FIG. 2.
  • the optical axis b of the light supplement lamp module 200 refers to the center line of the light supplement lamp module 200, and the direction of the light that enters the light supplement lamp module 200 along the optical axis b does not change when it exits.
  • the fill light module 200 includes a light board 210, a light source 220 and a fill lens 230.
  • the optical axis of the fill light lens 230 refers to the center line of the fill light lens 230. The direction of the light entering the fill light lens 230 along the optical axis of the fill light lens 230 does not change.
  • the optical axis b of the group 200 is collinear.
  • the light source 220 is a component for emitting light, and may be composed of one light-emitting device or an array composed of multiple light-emitting devices.
  • the light source 220 is a single LED lamp.
  • the light source 220 may also be an LED lamp array composed of multiple LED lamps. It is understandable that the type of the light source 220 in the present application can be changed adaptively as required.
  • the light source 220 may also be various types of light sources such as a laser, a xenon lamp, an incandescent lamp, a fluorescent lamp, and a high-pressure mercury lamp.
  • the light source 220 and the light supplement lens 230 are both fixed on the light board 210.
  • the light supplement lens 230 is fixed to the light board 210 and covered on the light source 220.
  • the light emitted by the light source 220 is refracted or reflected by the light supplement lens 230 and then emitted.
  • the light exit angle of the light is adjusted by the light supplement lens 230 to obtain a supplement light range of a desired shape and size.
  • the light board 210 is a circuit board, and the light source 220 is fixed on the light board 210 and electrically connected with the wires in the light board 210.
  • the electronic device 1000 further includes a drive control circuit, and the drive control circuit is used to control the light source 220 to turn on and off, or to control the brightness of the light source 220.
  • the circuit in the light board 210 is connected with the drive control circuit, and the light board 210 realizes the electrical connection between the light source 220 and the drive control circuit, so as to realize the control of the light source 220 by the drive control circuit.
  • FIG. 5 is a schematic diagram of the structure of the light-filling lens 230 shown in FIG. 2, and FIG. 6 is a side view of the light-filling lens 230 shown in FIG. 5.
  • the fill lens 230 has an integrated lens structure.
  • the fill lens 230 includes a first surface 231 and a second surface 232 oppositely disposed, and a peripheral surface 233 connected between the first surface 231 and the second surface 232.
  • the area of the first surface 231 of the fill lens 230 is smaller than the area of the second surface 232.
  • the light source 220 is located on the side of the fill lens 230 close to the first surface 231.
  • the first surface 231 is recessed with a receiving cavity 234 toward the second surface 232, and the receiving cavity 234 is used for accommodating the light source 220.
  • the receiving cavity 234 includes a bottom wall surface 2341 and a peripheral wall surface 2342, the bottom wall surface 2341 is opposite to the first surface 231, and the peripheral wall surface 2342 connects the bottom wall surface 2341 and the first surface 231.
  • the light emitted by the light source 220 is incident into the light-filling lens 230 through the bottom wall surface 2341 and the peripheral wall surface 2342 of the receiving cavity 234.
  • the peripheral surface 233 is a reflective surface for reflecting part of the light emitted by the light source 220.
  • the refractive index of the material forming the fill lens 230 is greater than that of air, so that the light emitted by the light source 220 will be totally reflected when irradiated on the peripheral surface 233, so that the peripheral surface 233 serves as Reflective surface.
  • the peripheral surface 233 may also be coated with a reflective film or other surface treatment methods, so that the peripheral surface 233 can serve as a reflective surface.
  • the second surface 232 is a light-emitting surface.
  • the light source 220 can also be directly arranged on the side of the first surface 231 away from the second surface 232.
  • the first surface 231 is the light incident surface, and the light emitted by the light source 220 enters the light through the first surface 231, and The light is emitted from the second surface 232 after being reflected and refracted by the light-filling lens 230.
  • both the first surface 231 and the second surface 232 are planes perpendicular to the optical axis of the fill lens 230.
  • the bottom wall surface 2341 of the receiving cavity 234 is a plane perpendicular to the optical axis of the fill lens 230, or a rotationally symmetric curved surface with the optical axis of the fill lens 230 as the central axis.
  • the receiving cavity 234 has a truncated cone shape or an elliptical cone shape.
  • the opening area of the accommodating cavity 234 is larger than the area of the orthographic projection of the bottom wall surface 2341 of the accommodating cavity 234 on the first surface 231, so that the accommodating cavity 234 has a draft slope, which is convenient for demolding and other operations when making the fill light lens 230 through a mold. .
  • the accommodating cavity 234 when the accommodating cavity 234 is in the shape of a truncated cone, the cross section of the accommodating cavity 234 at any position perpendicular to the optical axis b is circular; when the accommodating cavity 234 is in the shape of an elliptical cone, the cross section of the accommodating cavity 234 at any position perpendicular to the optical axis b is Oval.
  • the accommodating cavity 234 is in the shape of a truncated cone or ellipse, it can be ensured that the light path of the light entering the fill lens 230 through the bottom wall surface 2341 of the accommodating cavity 234 and the light reflected by the peripheral surface 233 of the fill lens 230 can be mutually resolved. Coupled.
  • the curved shape of the peripheral surface 233 that is, changing the shape of the cross-section of the fill lens 230 perpendicular to the optical axis b
  • the part of the light incident through the side wall surface 2342 of the receiving cavity and reflected by the peripheral surface 233 can be emitted.
  • the required size and shape of the fill light range can be formed.
  • the size and shape of the required supplementary light range can be formed by the part of the light incident through the bottom wall surface 2341.
  • the size and shape of the target fill light range controlled by the bottom wall surface 2341 and the size and shape of the target fill light range controlled by the peripheral surface 233 have no influence on each other, that is, it can be achieved that the bottom wall surface 2341 of the receiving cavity 234 enters the fill light lens 230
  • the light inside and the light path of the light reflected by the peripheral surface 233 of the light supplement lens 230 are decoupled from each other, so that the fill light module 200 can achieve a higher degree of freedom in the size and shape of the target supplement light range, and reduces design variables.
  • the required fill light module 200 can be easily and accurately designed to obtain the shape and size of the target fill light range (that is, the shape and size of the fill light range of the fill light module 200 are basically the same as the shape of the field of view. And the same size), so that each position of the field of view can be uniformly filled, so as to achieve precise key lighting, avoid light waste, improve the optical efficiency of the fill light module 200, and reduce stray light outside the field of view .
  • the accommodating cavity 234 has a truncated cone shape. It can be understood that, in some embodiments, the receiving cavity 234 may also be cylindrical or elliptical.
  • the size of the cross section of the fill lens 230 perpendicular to the optical axis b in the first direction is the first size
  • the size of the second surface 232 in the first direction is the third size
  • the cross section of the light supplement lens 230 perpendicular to the optical axis b refers to the area surrounded by the contour of the light supplement lens 230 after the light supplement lens 230 is cut by a plane perpendicular to the optical axis b.
  • the size of the field of view of the lens 10 in the first direction is the second size.
  • the first direction and the vertical field of view direction of the lens 10 form a first angle, and both the first size and the third size are negatively related to the second size.
  • the negative correlation is a change in the opposite direction.
  • the first size is negatively correlated with the second size, that is, as the first direction changes, the larger the second size, the smaller the first size.
  • the third size is negatively related to the second size, that is, as the first direction changes, the larger the second size, the smaller the third size.
  • the corresponding fill lens 230 is obtained according to the field of view range of the lens 10, so that the fill light range of the fill light module 200 is
  • the shape of the field of view of the corresponding lens 10 is basically the same, and the fill light range of the fill light module 200 can completely cover the field of view of the corresponding lens 10, thereby ensuring that the fill light module 200 can be the same as the lens 10
  • Various positions within the field of view are filled with light, and at the same time, waste of light energy of the fill light module 200 can be avoided, stray light outside the field of view of the lens 10 can be reduced, and light pollution can be reduced.
  • the field of view range of the lens module 100 is the field of view taken by the lens 10, in other words, the field of view range of the lens module 100 is the field of view of the lens 10.
  • the fill light range of the fill light module 200 can completely cover the field of view range of the lens 10, that is, the fill light range of the fill light module 200 can coincide with the field of view range of the lens 10, or the fill light module 200
  • the fill light range of the lens 10 can also be slightly larger than the field of view range of the lens 10. In other words, when the shooting plane of the lens 10 and the illumination plane of the fill light module 200 are coplanar, the field of view of the lens 10 on the shooting plane completely coincides with the spot area of the fill light module 200 on the illumination plane. , Or located in the spot area of the fill light module 200 on the illumination plane. Please refer to FIG. 7. FIG.
  • the field of view range of the lens 10 is a pincushion shape.
  • the fill light range of the fill light module 200 is the same pincushion shape as the field of view formed by the lens 10, and is slightly larger than the view field range of the lens 10, which is located in the fill light of the fill light module 200 Scope.
  • the field of view formed by the lens 10 can be barrel-shaped, pincushion-shaped, rectangular, square, etc., according to the negative correlation between the first size and the third size and the second size.
  • the light-filling lens 230 whose light-filling range is substantially the same as the shape and size of the field of view formed by the lens 10.
  • the field of view formed by the lens module 100 is barrel-shaped, and the light-filling range of the light-filling module 200 where the light-filling lens 230 is located is obtained according to the corresponding relationship between the first size and the negative correlation between the third size and the second size.
  • the light-filling range of the light-filling module 200 where the light-filling lens 230 is located is obtained according to the corresponding relationship between the first size and the negative correlation between the third size and the second size Also rectangular.
  • FIG. 8a and FIG. 8b are schematic diagrams of the principle that light forms a light-filling range A after passing through the light-filling lens 230 shown in FIG. 5.
  • the dashed line shows the schematic diagram of the transmission direction of the light.
  • the field of view of the lens 10 is pincushion
  • the fill lens 230 is obtained according to the corresponding relationship between the first size and the negative correlation between the third size and the second size.
  • the light is refracted and reflected by the light supplement lens 230 to form a pincushion-shaped light supplement area A corresponding to the field of view of the lens 10.
  • FIG. 9 is a schematic cross-sectional view of the fill lens 230 shown in FIG. 5 perpendicular to the optical axis b
  • FIG. 10 is a schematic view of the field of view of the lens 10 of the electronic device shown in FIG. 2.
  • the first direction includes at least the vertical field of view direction of the lens 10 (the Y-axis direction in FIG. 10), the horizontal field of view direction of the lens 10 (the X-axis direction in FIG. 10), and the diagonal view of the lens 10.
  • Field direction that is, the diagonal direction of the field of view of the lens 10).
  • the first included angle ⁇ is 0°, the size of the first dimension is d1, and the size of the second dimension is L1;
  • the second direction is the horizontal field of view of the lens 10 In the direction, the first included angle ⁇ is 90°, the size of the first dimension is d2, and the size of the second dimension is L2;
  • the third direction is the diagonal field of view direction of the lens 10
  • the first included angle ⁇ is If it is greater than 0° and less than 90°, the size of the first size is d3, and the size of the second size is L3.
  • d2 is greater than d1, and L2 is less than L1;
  • d3 is greater than d2, and L3 is less than L2.
  • first included angles ⁇ that is, the size of any cross-section of the fill lens 230 in any direction is negatively related to the size of the field of view of the lens 10 in that direction.
  • the fill light area of the fill light module 200 can more accurately correspond to the field of view of the lens 10, so that the fill light module 200 can achieve higher light utilization, reduce energy waste, and more To reduce stray light outside the field of view. Since the size in each direction within the field of view of the lens 10 changes continuously, and the first included angle ⁇ has an infinite number, the size in each direction on any cross section of the fill lens 230 also changes continuously.
  • the peripheral surface 233 of the fill lens 230 is a continuous curved surface, that is, there is no sudden curvature change on the peripheral surface 233, that is, the curvature continuity changes at different positions of the curved surface, so as to ensure that the light reflected by the peripheral surface 233 exits.
  • the fill light in the fill light area formed later is more uniform.
  • the field of view of the lens 10 when the field of view of the lens 10 is pincushion, barrel, or rectangular, the field of view of the lens 10 corresponds to the size of the vertical field of view and the size of the horizontal field of view is different, and the diagonal view
  • the size of the field direction is larger than the size of the vertical field of view and the size of the horizontal field of view, according to the negative correlation between the first size and the third size and the second size, the obtained fill lens 230 is perpendicular to the optical axis b.
  • Both the cross section and the second surface 232 are rhombus-like. Among them, the rhombus is a shape similar to the rhombus, and its diagonal is vertical and the length is different.
  • the diagonal direction of the rhombus corresponds to the vertical field of view direction and the horizontal field of view direction of the lens 10 respectively.
  • the supplemental light module 200 is arranged close to the lens module 100, and the optical axis b of the supplementary light module 200 is parallel to the optical axis a of the lens module 100, thereby ensuring the supplementary light module 200
  • the light area can cover the field of view of the lens module 100. It can be understood that, in some embodiments, the optical axis b of the supplementary light module 200 and the optical axis a of the lens module 100 are at a certain angle, so as to meet the actual supplementary light requirements.
  • the field of view of the lens module 100 is pincushion, barrel, or square.
  • the field of view of the lens module 100 corresponds to the size of the vertical field of view and the size of the horizontal field of view.
  • the size of the diagonal field of view is larger than the size of the vertical field of view and the field of view of the horizontal field of view, according to the corresponding relationship between the first size and the third size and the second size, the complementary light lens is obtained
  • the cross section of 230 perpendicular to the optical axis b and the second surface 232 are both square-like. Among them, a square-like shape is a shape similar to a square, and its two diagonal lines are perpendicular and the length is the same.
  • the contour line of the cross-section perpendicular to the optical axis b of the diamond-like or square-like fill lens 230 is a free curve, and the curvature of each position changes continuously.
  • the first surface 231 of the light supplement lens 230 may be circular, elliptical, rhomboid-like or square-like, and the peripheral surface 233 transitionally connects the first surface 231 and the second surface 232, that is, the light supplement lens 230 is perpendicular to the light.
  • the cross section of the shaft b gradually changes from the same shape as the first surface 231 to the same shape as the second surface 232 in the direction from the first surface 231 to the second surface 232. For example, in the embodiment shown in FIG.
  • the first surface 231 of the light supplement lens 230 is circular
  • the second surface 232 is a rhombus-like shape
  • the peripheral surface 233 transitionally connects the first surface 231 and the second surface 232, that is, the light supplement lens
  • the cross section of 230 perpendicular to the optical axis b gradually changes from a circular shape to the same rhombus-like shape as the second surface 232 in the direction from the first surface 231 to the second surface 232.
  • the field of view of any lens module 100 close to the optical axis a of the lens module 100 has almost no distortion, that is, the paraxial light of the lens module 100 can almost be transformed into an image without distortion, so the field of view is close to
  • the area of the optical axis a is suitable for circular or rectangular fill light; the farther the field of view of the lens module 100 is from the optical axis a, the greater the distortion and distortion, that is, the farther away the lens module 100 is from the optical axis a, the imaging distortion (Barrel distortion or pincushion distortion) is larger, therefore, it is more suitable to fill light with pincushion or barrel for the area far from the optical axis a.
  • the first surface 231 is circular
  • the second surface 232 is rhombus-like
  • the peripheral surface 233 transitionally connects the first surface 231 and the second surface 232, so that the light fill area of the fill light module 200 is
  • the illuminance distribution can correspond to different degrees of distortion at different positions in the field of view of the lens module 100, so as to meet the needs of supplementary light at different positions in the field of view of the lens module 100, so that the supplementary light can be more uniform.
  • the first surface 231 of the light supplement lens 230 may also be rhombus-like.
  • the two diagonals of the first surface 231 are in the same direction as the two diagonals of the second surface 232, and are respectively aligned with the vertical and horizontal directions of the lens module 100.
  • the direction of the field of view is the same, so that any cross-section of the fill light lens 230 perpendicular to the optical axis b is rhombus-like, ensuring that the fill light area of the fill light module 200 can match the field of view range of the lens module 100, improving the compensation
  • the optical efficiency of the light module 200 reduces light pollution outside the field of view.
  • FIG. 11 is a schematic structural diagram of a light supplement lens 230 according to another embodiment of this application.
  • the light supplement lens 230 is also provided with a foolproof structure 235.
  • the foolproof structure 235 can ensure that the light supplement lens 230 can be installed on the light board 210 in the correct direction, thereby ensuring that the light supplement lens 230 is vertical.
  • the cross section in the direction of the optical axis b and the diagonal direction of the second surface 232 correspond to the vertical field of view and the horizontal field of view of the lens 10 respectively, ensuring that the first dimension and the third dimension are negatively correlated with the second dimension.
  • the foolproof structure 235 includes two protrusions provided on the first surface 231 and two grooves or openings provided at corresponding positions on the light board 210.
  • the line connecting the two protrusions on the first surface 231 is the diagonal direction of the second surface 232.
  • FIG. 12 is a schematic cross-sectional view of the fill lens 230 along the optical axis b according to another embodiment of the application
  • FIG. 13 is a side view of the fill lens 230 shown in FIG. 12 .
  • the difference between this embodiment and the fill lens 230 shown in FIG. 5 is that: in this embodiment, the bottom wall surface 2341 of the accommodating cavity 234 is curved, and the distance from the boundary of the bottom wall surface 2341 in the first direction to the second surface 232 is the first One distance, the first distance is positively related to the second dimension. Wherein, the positive correlation is a change in the same direction.
  • the first distance is positively correlated with the second size, that is, as the first direction changes, the larger the second size, the larger the first distance.
  • the fill lens 230 includes a first part 230a and a second part 230b disposed around the first part 230a.
  • the peripheral edge of the bottom wall surface 2341 extends along the direction of the optical axis b to form a dummy surface 230c, wherein the part of the fill lens 230 surrounded by the dummy surface 230c is the first part 230a, and the dummy surface 230c extends to the peripheral surface of the fill lens 230
  • the part of the fill lens 230 between 233 is the second part 230b.
  • the first distance refers to the thickness of the edge position of the first portion 230a in the first direction. It should be noted that in some embodiments, the first part 230a and the second part 230b are integrally formed, and the dummy surface 230c is not an actual surface, but is only used to divide the first part 230a and the second part of the fill lens 230. The surface defined by 230b.
  • the corresponding structure of the first part 230a of the fill lens 230 is obtained according to the field of view of the lens 10, so that the light passes through the first part of the fill lens 230.
  • the fill light range formed by a part 230a after exiting can also be basically the same shape as the field of view of the corresponding lens 10, and the fill light range formed by the first part 230a of the fill lens 230 after exiting can cover the view of the corresponding lens 10.
  • the fill light range formed after light exits the first part 230a of the fill light lens 230 refers to the area irradiated by the light after it passes through the fill light lens 230 and exits from the light exit surface of the fill light lens.
  • the light energy utilization rate of the supplementary light module 200 can reach 80% to 85%, which can be increased by 10% to 15% compared with the general supplementary light module 200.
  • FIGS. 14a and 14b are schematic diagrams of light supplementing light after passing through the first portion 230a of the light supplement lens 230 shown in FIG. 12.
  • the first part 230a of the fill lens 230 in FIG. 14a and FIG. 14b is obtained according to the positive correlation between the first distance and the second size, corresponding to the field of view of the pincushion lens module 100.
  • the fill light area obtained by the first part 230a of the fill lens 230 shown in FIGS. 14a and 14b is a pincushion shape corresponding to the field of view of the lens module 100, so as to ensure the fill light lamp module
  • the group 200 achieves a better fill light for the lens module 100, while reducing energy waste and achieving higher energy utilization.
  • FIG. 15 is a schematic structural diagram of the first part 230 a of the fill lens 230 shown in FIG. 14 a.
  • the structure of the first part 230a of the fill lens 230 shown in FIG. 15 is correspondingly obtained according to the field of view of the lens 10 shown in FIG. 10, so that the first part 230a of the first part 230a of the fill lens 230 shown in FIG.
  • the distance is positively correlated with the second size of the field of view range of the lens 10 shown in FIG. 10.
  • the first direction includes at least the vertical field of view direction of the lens 10, the horizontal field of view direction of the lens 10, and the diagonal field of view direction of the lens 10.
  • the first included angle ⁇ is 0°, the first distance is ⁇ 1, and the second dimension is L1; when the second direction is the horizontal field of view of the lens 10, The first included angle ⁇ is 90°, the first distance is ⁇ 2, and the second dimension is L2; when the third direction is the diagonal field of view direction of the lens 10, the first included angle ⁇ is greater than 0° and less than 90° At this time, the first distance is ⁇ 3, and the second dimension is L3.
  • first included angles ⁇ that is, the first distance in any direction of the first portion 230a of the fill lens 230 is the same as the second dimension of the field of view of the lens 10 in this direction.
  • the positive correlation enables the fill light area of the fill light module 200 to more accurately correspond to the field of view of the lens 10, so that the fill light module 200 can achieve higher light utilization, reduce energy waste, and Reduce the stray light outside the field of view more.
  • the thickness of the first part 230a at different positions changes continuously, that is, the bottom wall surface 2341 is a continuous curved surface, and the curvature of each position of the bottom wall surface 2341 changes continuously, and there is no position where the curvature changes suddenly, so that the first part 230a passes through
  • the fill light in the fill light area formed after the emission is relatively uniform.
  • the bottom wall surface 2341 of the fill lens 230 may be an outer convex surface facing the first surface 231 or an inner concave surface away from the first surface 231.
  • the bottom wall surface 2341 of the fill lens 230 shown in FIG. 15 is a convex surface facing the first surface 231, so that the first portion 230a has a positive refractive power and has a function of converging light.
  • FIG. 16 is a schematic structural diagram of the first part 230 a of the light supplement lens 230 according to another embodiment of the application.
  • the bottom wall surface 2341 of the fill lens 230 is a concave surface away from the first surface 231, so that the first portion 230a has a negative refractive power and has a function of diverging light.
  • the fill light range formed by the same light rays through the first part 230a of the fill lens 230 shown in FIG. 16 is larger than the fill light range formed by the first part 230a of the fill lens 230 shown in FIG. 15.
  • the fill light range of the fill light module 200 can also be Fill light with the field of view of the lens module 100.
  • the size and shape of the fill light area of the first part 230a can be the same as the size and shape of the field of view of the lens module 100, the light energy utilization rate of the fill light module 200 can also be improved, and the field of view range can be reduced. Stray light outside.
  • FIG. 17 is a schematic diagram of the structure of the light supplement lens 230 according to another embodiment of the application.
  • the fill lens 230 has a rotationally symmetric truncated cone structure with the optical axis b as the axis. That is, the cross-section of the fill lens 230 perpendicular to the optical axis b is circular rather than rhombus-like.
  • the bottom wall surface 2341 is a free-form surface, the fill light range of the light emitted through the bottom wall surface 2341 matches the field of view range of the lens 10, that is, the shape and size of the fill light range of the light emitted through the bottom wall surface 2341
  • the shape and size of the field of view of the lens 10 are basically the same.
  • the supplementary light range of the light emitted by the bottom wall surface 2341 is also pincushion; when the field of view of the lens 10 is a barrel shape, the supplementary light range of the light emitted by the bottom wall surface 2341 It is also barrel-shaped, so that the light energy of the fill light module 200 can be efficiently used, and off-site stray light can be avoided.
  • FIG. 18 is a schematic structural diagram of a fill light module 200 according to another embodiment of this application
  • FIG. 19 is a schematic structural diagram of the fill light lens 230 shown in FIG. 18.
  • the light-filling lens 230 includes a light-reflecting housing 230d and a light-emitting lens 230e, and the light-emitting lens 230e is fixed in the light-reflecting housing 230d.
  • the inner surface of the reflective housing 230d is a peripheral surface 233 for reflecting part of the light emitted by the light source 210.
  • the plane enclosed by the bottom contour of the reflective housing 230 d is the second surface 232, and the plane enclosed by the top contour of the reflective housing 230 d is the first surface 231.
  • the light emitting lens 230e is fixed on the side of the reflective housing 230d close to the first surface 231. Specifically, in some embodiments, the light-emitting lens 230e is fixed in the reflective housing 230d through a bracket 230f, part of the light emitted by the light source 220 is refracted by the light-emitting lens 230e and then emitted, and part of the light is reflected by the reflective housing 230d and then emitted.
  • the bracket 230f is a transparent bracket 230f or a bracket 230f formed by a thin rod with a smaller volume, so as to prevent the bracket 230f from blocking the light emitted by the light source 220.
  • the structure of the light-emitting lens 230e may be similar to the structure of the first part 230a of the light-filling lens 230 shown in FIGS. 15 and 16. That is, the edge thickness of the light emitting lens 230e in the first direction is the first thickness, and the first thickness is positively correlated with the second size, so as to ensure that the shape and size of the fill light range formed by the light refracted by the light emitting lens 230e are the same as those of the lens 10.
  • the shape and size of the field of view range are basically the same, so that the fill light range of the fill light module 200 and the field of view range of the lens 10 basically coincide, improve the light utilization rate of the fill light module 200, and reduce the field of view of the lens 10 Stray light outside the range.
  • the structure of the inner surface of the reflective housing 230d is the same as the structure of the peripheral surface 233 of the fill lens 230 shown in FIG. 5.
  • the cross section of the fill lens 230 perpendicular to the optical axis b refers to the area enclosed by the inner surface contour of the reflective housing 230d located on the plane after the reflective housing 230d is cut by a plane perpendicular to the optical axis b .
  • the cross section of the fill lens 230 perpendicular to the optical axis b or the size of the second surface 232 in the first direction is the first size, and the first size is negatively related to the second size, and the size of the second surface 232 in the first direction is The third size, and the third size is also negatively related to the second size, so that the size and shape of the fill light range formed by the light emitted by the light source 220 after being reflected by the reflective housing 230d and emitted is the same as the field of view range of the lens module 100 It is basically the same, thereby further improving the light-filling efficiency of the light-filling lens 230 and reducing stray light outside the field of view.
  • the light-filling lens 200 may only include the reflective housing 230d shown in the embodiment of FIG. 18 without the light-emitting lens 230e.
  • the light-filling lens 200 includes the light-emitting lens 230e shown in the embodiment of FIG. 17, and the light-reflecting housing 230d included in the light-filling lens 200 may have other structures different from the embodiment shown in FIG. 18.
  • the space enclosed by the inner surface of the reflective housing 230d may be in the shape of a truncated cone or an elliptical cone.
  • a supplementary lens 230 with a certain structure is correspondingly designed, so as to ensure that the shape and size of the supplementary light range of the supplementary lamp module 200 are consistent with the field of view range of the lens module 100.
  • the shapes and sizes are basically the same, so that better key lighting can be achieved, the light utilization rate of the fill light module 200 can be improved, the waste of energy can be reduced, and the stray light outside the field of view can be more reduced.
  • the lens module 100 included in the mobile phone is a wide lens and a fill light module 200 that fills the field of view of the wide lens.
  • the field of view of a wide-angle lens is generally pincushion.
  • the fill light lens 230 of the fill light module 200 in this embodiment is designed according to the field of view range of the wide-angle lens. Therefore, the fill light range of the fill light module 200 in this embodiment is the same as that of the wide-angle lens in this embodiment.
  • the shape and size of the field of view are basically the same, so as to achieve better focused illumination of the field of view of the wide-angle lens, improve the light utilization rate of the fill light module 200, reduce energy waste, and reduce the field of view more Stray light outside.
  • the field of view of the lens module 100 can be changed according to the focal length of the lens module 100.
  • FIG. 20 is a shape diagram of the field of view range of the zoom lens under different focal lengths.
  • the field of view formed by the lens module 100 is the area enclosed by the contour A in FIG. 20, and its shape is pincushion;
  • the focal length of the zoom lens is adjusted to the tele end, the lens
  • the field of view formed by the module 100 is the area enclosed by the contour B in FIG.
  • the shape of the area formed by the contour C transitions from the pincushion shape enclosed by the contour A to the barrel shape enclosed by the contour B.
  • the fill light module can accurately illuminate the field of view of the zoom lens, improve the light utilization rate of the fill light module 200, reduce energy waste, and more reduce the stray light outside the field of view .
  • FIG. 21 is a schematic structural diagram of a supplementary light module 200 according to another embodiment of this application.
  • the fill light module 200 of this embodiment is a zoom lens for fill light.
  • the fill light module 200 has two light sources 220 and two fill lenses 230.
  • the two light sources 220 and the two fill lenses 230 are both installed on the light board 210, and the light source 220 corresponds to the fill lens 230 one-to-one, and the two fill lenses 230 respectively correspond to the fill light range of the wide end and the tele end of the zoom lens. Match the field of view.
  • the light source 220 corresponding to the fill lens 230 that matches the field of view at the wide end is turned on, so that the fill light module 200 has the same shape and size as the field of view at the wide end.
  • the light source 220 corresponding to the fill light lens 230 that matches the tele end’s field of view is turned on, so that the fill light module produces the shape, size and tele end view
  • the field range is basically the same as the fill light range.
  • the number of the fill light lens 230 and the light source 220 included in the fill light module 200 may be three or more.
  • the intermediate magnification fill light requirement between the Wide end and the tele end of the lens is relatively high. Therefore, the fill light module 200 corresponding to the fill light module 200 except for the two light fill lenses 230 that are connected to the wide end of the zoom lens.
  • the fill light lens 230 can match the focal length between the wide end and the tele end of the zoom lens.
  • the field of view formed by the zoom lens is to match the view formed when the focal lengths of the zoom lens are located at the Wide end of the lens, the Tele end of the lens, and between the Wide end and the Tele end of the lens through three or more fill lenses 230. Field range. Or, in some embodiments, when the zoom magnification of the zoom lens is small, and the focal length of the zoom lens is located at the Wide end, the Tele end, or between the Wide end and the Tele end, the field of view formed by the zoom lens changes less.
  • the fill light module 200 can also be equipped with only one fill lens 230.
  • the fill light module 200 may only be configured with the fill light lens 230 corresponding to the focal length of the zoom lens in the field of view formed by the wide end.
  • FIG. 22 is a schematic structural diagram of an electronic device 1000 according to an embodiment of this application.
  • the electronic device 1000 further includes a driving module 300, a processor 400, and the aforementioned lens assembly.
  • the driving module may be a driving control circuit.
  • the photosensitive element 20 of the lens assembly can be used to detect the illuminance of the field of view range of the lens 10 of the lens assembly.
  • the processor 400 can be used to control the fill light module 200 according to the illuminance of the environment where the electronic device 100 is located and the illuminance of the field of view of the lens 10.
  • the processor 400 controls the driving module according to the illuminance of the environment in which the electronic device 100 is located, so as to control the fill light module 200 through the driving module.
  • the processor 400 controlling the supplementary light module 200 may control the supplementary light module 200 to be turned on or off.
  • FIG. 23 is a flowchart of the processor 400 controlling the turn-on or turn-off of the fill light module 200.
  • the processor 400 controlling the fill light module 200 to turn on or turn off includes the following steps:
  • the photosensitive element 20 detects the illuminance of the field of view of the lens 10 and sends the illuminance information of the field of view to the processor 400.
  • the lens 10 of the lens module 100 collects the light signal of the target scene 1 in the field of view and transmits it to the photosensitive element 20, and the photosensitive element 20 converts the light signal of the target scene 1 in the field of view collected by the lens 10 into electric signal.
  • the processor 400 judges the magnitude of the illuminance of the field of view according to the illuminance information.
  • the processor 400 includes an image signal processor (ISP), and the image processing module converts the electrical information transmitted from the photosensitive element 20 into image or video information, and reads the image brightness information in the image or video information. size.
  • ISP image signal processor
  • the brightness of the image is positively correlated with the illuminance of the field of view of the lens 10, and therefore, the size of the illuminance of the field of view can be judged by the brightness of the image.
  • the driving module 300 responds to the first signal to control the fill light module 200 to turn on, so that the fill light module 200 fills the field of view of the lens 10 to increase the illuminance in the field of view of the lens 10.
  • the driving module 300 adjusts the lens module 100 before controlling the fill light module 200 to turn on. If adjusting the lens module 100 can increase the brightness of the image, there is no need to control the fill light module 200 to turn on; if Adjusting the lens module 100 cannot increase the brightness of the image, so the fill light module 200 is controlled to be turned on.
  • adjusting the lens module 100 may be controlling the ICR of the lens module 100, changing the size of the aperture, or changing the focal length of the lens 10.
  • the driving module 300 responds to the second signal to control the fill light module 200 to turn off, thereby saving energy consumption.
  • the processor 400 controlling the supplemental light module 200 may also adjust the supplementary light brightness of the supplementary light module 200 or dim the supplementary light brightness of the supplementary light module 200.
  • FIG. 24 is a flowchart of the processor 400 adjusting the brightness of the fill light module 200 or dimming the brightness of the fill light module 200.
  • the processor 400 adjusting the brightness of the fill light of the fill light module 200 or dimming the brightness of the fill light of the fill light module 200 includes the steps:
  • the photosensitive element 20 detects the illuminance of the field of view of the lens 10 and sends the illuminance information of the field of view to the processor 400.
  • the processor 400 judges the magnitude of the illuminance of the field of view according to the illuminance information.
  • the driving module 300 responds to the third signal to adjust the brightness of the fill light of the fill light module 200, so that the fill light module 200 has a good fill light effect for the field of view of the lens 10.
  • the lens module 100 is adjusted before the driving module 300 adjusts the brightness of the fill light module 200. If adjusting the lens module 100 can increase the image brightness, there is no need to adjust the brightness of the fill light module.
  • adjusting the lens module 100 may be controlling the ICR of the lens module 100, changing the size of the aperture, or changing the focal length of the lens 10.
  • the driving module 300 responds to the fourth signal to dim the brightness of the fill light of the fill light module 200, thereby saving energy consumption.
  • the processor 400 controls the fill light module 200 to adjust the brightness of the fill light module 200 or dim the brightness of the fill light module 200. And control the fill light module 200 to turn on or turn off. That is, the processor 400 can control the opening, closing, and closing of the supplement light module 200, and control the brightness of the supplement light of the supplement light module 200 to be bright or dark.
  • the electronic device 1000 may further include a photosensitive sensor 500, and the photosensitive sensor 500 is used to detect the illuminance of the environment in which the electronic device 1000 is located.
  • the processor 400 can control the fill light module 200 according to the illuminance of the field of view of the lens 10 detected by the photosensitive element 20 and the environmental illuminance of the electronic device 1000 detected by the photosensitive sensor 500, so that the fill light module can be used
  • the 200-pair illuminance control within the field of view of the lens 10 is more accurate.
  • the processor 400 can also control the fill light module 200 only according to the illuminance of the environment in which the electronic device 1000 is detected by the photosensitive sensor 500.
  • the electronic device 1000 further includes a memory 600, and the memory 600 can store imaging of the lens module 100.
  • the lens module 100 converts the optical signal into an electrical signal and then transmits it to the processor 400.
  • the processor 400 converts the electrical signal obtained from the lens module 100 into image information or video information and performs processing (for example, for dead pixels, black level, etc.). After correction processing of brightness, sharpness, white balance, noise reduction, color, etc.), the processed image information or video information is transferred to the memory 600 for storage.
  • the processor 400 is configured to store the imaging of the lens module 100 in the memory 600 through control.
  • the lens module 100 directly stores image information or video information in the memory under the control of the processor 400 (the data transmission channel between the memory 600 and the lens module 100 is not shown in the figure).
  • the processor 400 extracts structured data (such as the occurrence time, movement track, facial features, license plate, etc.) of the suspected case in the image or video from the image information or video information, so that only the structured information can be extracted. Store in the memory 600 to save storage space.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Studio Devices (AREA)

Abstract

L'invention concerne une lentille pour lumière d'appoint (230), un module de lampe d'appoint (200), un ensemble objectif et un dispositif électronique (1000). La structure de la lentille pour lumière d'appoint (230) est obtenue au moyen d'une conception correspondante en fonction du champ de vision d'un objectif de dispositif de prise de vues (100), c'est-à-dire qu'une première taille de la section transversale de la lentille pour lumière d'appoint (230) perpendiculaire à un axe optique (b) est en corrélation négative avec une deuxième taille du champ de vision de l'objectif de dispositif de prise de vues (10), et une troisième taille d'une seconde surface (232) de la lentille pour lumière d'appoint (230) est en corrélation négative avec la deuxième taille du champ de vision de l'objectif de dispositif de prise de vues (10) ; et/ou une première distance entre la paroi inférieure (2341) d'une cavité de réception (234) de la lentille pour lumière d'appoint (230), destinée à recevoir une source de lumière (220), et la seconde surface (232) est en corrélation positive avec la deuxième taille du champ de vision de l'objectif de dispositif de prise de vues (10), ce qui permet de garantir que la forme et la taille d'une zone de lumière d'appoint du module de lampe d'appoint (200) sont fondamentalement identiques à la forme et à la taille du champ de vision de l'objectif de dispositif de prise de vues (10). Par conséquent, l'utilisation de la lumière émise par le module de lampe d'appoint (200) est améliorée, le gaspillage énergétique est réduit, la lumière parasite à l'extérieur du champ de vision est encore réduite et la pollution lumineuse est également réduite.
PCT/CN2021/087949 2020-05-15 2021-04-17 Lentille pour lumière d'appoint, module de lampe d'appoint, ensemble objectif et dispositif électronique WO2021227778A1 (fr)

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CN202010415372.6 2020-05-15

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