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WO2021232911A1 - 移动终端 - Google Patents

移动终端 Download PDF

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Publication number
WO2021232911A1
WO2021232911A1 PCT/CN2021/081250 CN2021081250W WO2021232911A1 WO 2021232911 A1 WO2021232911 A1 WO 2021232911A1 CN 2021081250 W CN2021081250 W CN 2021081250W WO 2021232911 A1 WO2021232911 A1 WO 2021232911A1
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WO
WIPO (PCT)
Prior art keywords
light
camera
sub
mobile terminal
hole
Prior art date
Application number
PCT/CN2021/081250
Other languages
English (en)
French (fr)
Inventor
陈嘉伟
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202010444229.XA external-priority patent/CN111510610A/zh
Priority claimed from CN202020878497.8U external-priority patent/CN212381271U/zh
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Publication of WO2021232911A1 publication Critical patent/WO2021232911A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof

Definitions

  • This application relates to the field of imaging technology, and in particular to a mobile terminal.
  • the macro camera can be used for close macro shooting
  • the super macro camera can be used for super macro shooting.
  • the flash used to fill light is far away from the camera.
  • the distance between the functional camera and the subject is generally only a few centimeters or even a few millimeters.
  • the illuminance in the field of view is obviously insufficient, and the subject in the field of view cannot be photographed clearly.
  • the embodiments of the present application expect to provide a mobile terminal that can provide sufficient illumination for the field of view in the close-range shooting mode.
  • an embodiment of the present application provides a mobile terminal, including:
  • a light-filling module includes a light-filling light source, and a light guide with a first escape port; a plane perpendicular to the optical axis of the camera is a projection surface, and the camera is close to the end surface of the object side
  • the projection on the projection surface is located in the projection of the first relief opening on the projection surface; the end of the light guide near the object side has a plurality of convex portions arranged at intervals, and each convex
  • the rising portion includes a reflective surface and a light-emitting surface corresponding to the reflective surface.
  • the light from the supplemental light source enters the light guide, and the reflective surface reflects a part of the light from the supplemental light source to the corresponding
  • the light-emitting surface is guided to the field of view of the camera through the corresponding light-emitting surface.
  • the reflecting surfaces of a plurality of the protrusions are arranged in parallel and spaced apart, and the angle between the reflecting surface of one of the protrusions and the light-emitting surface is equal to that of the other protrusion.
  • the angle between the reflecting surface and the light emitting surface is the same.
  • the included angle between the reflective surface and the light emitting surface of the same convex portion ranges from 15° to 45°.
  • the light-emitting surfaces of a plurality of the protrusions are arranged in parallel and spaced apart, and among the two adjacent protrusions, the reflective surface and the light-emitting surface of the protrusions that are close to the optical axis are The included angle therebetween is greater than the included angle between the reflective surface of the convex portion far away from the optical axis and the light-emitting surface; or,
  • the light-emitting surfaces of the plurality of protrusions are arranged in parallel and spaced apart. Among the two adjacent protrusions, the light-emitting surface of the protrusion near the optical axis is between the reflective surface and the light-emitting surface. The included angle is smaller than the included angle between the reflective surface and the light-emitting surface of the convex portion away from the optical axis.
  • the light-emitting surface is perpendicular to the projection surface; or, the light-emitting surface is inclined with respect to the projection surface.
  • the end of the camera close to the object side is inserted in the first avoidance opening; or, the light guide is arranged at the end of the camera close to the object side, and the camera is located at the first avoidance opening Outside.
  • the light guide includes a plurality of sub light guides, and the plurality of sub light guides are arranged at intervals to form the first escape opening.
  • the number of the supplementary light sources is multiple, and the multiple supplementary light sources are arranged at intervals along the circumferential direction of the functional camera.
  • the light guide has an installation space provided on a peripheral side of the first escape opening, and the supplemental light source is provided in the installation space.
  • the mobile terminal further includes a protective lens, and a housing with an accommodation cavity, and the housing has a second escape hole communicating with the accommodation cavity;
  • the camera and the light supplement module are both arranged in the accommodating cavity, and the end of the camera close to the object side and the light guide are both located at the second escape hole, and the protective lens is arranged at The second escape hole.
  • the second escape hole includes a first sub-hole and a second sub-hole
  • the protective lens includes a first sub-lens and a second sub-lens
  • the second sub-hole is surrounded by the peripheral side of the first sub-hole, the end of the camera close to the object side is located at the first sub-hole, and the light guide is located at the second sub-hole;
  • the first sub-lens is disposed in the first sub-hole, and the second sub-lens is disposed in the second sub-hole.
  • the end surface of the light guide member far away from the object side is a non-transparent surface.
  • the embodiment of the present application provides a mobile terminal.
  • the light source can be supplemented from the peripheral side of the camera through the protrusions.
  • the light is guided to the subject, thus, as much light as possible can be guided to the field of view of the camera in the limited structural space, so that in the close-range shooting mode, sufficient light can be provided for the field of view of the camera, and then , You can clearly shoot the subject in the field of view.
  • FIG. 1 is a schematic structural diagram of a camera according to an embodiment of the application.
  • Figure 2 is a schematic diagram of a mobile phone photographing a subject
  • FIG. 3 is a partial cross-sectional view of a mobile terminal according to an embodiment of the application, and the continuous arrows in the figure indicate the direction in which a part of the light of the light guide light source propagates;
  • FIG. 4 is a partial cross-sectional view of a second type of mobile terminal provided by an embodiment of the application, and the continuous arrows in the figure indicate the direction in which a part of the light of the light guide light source propagates;
  • FIG. 5 is a partial cross-sectional view of a third type of mobile terminal provided by an embodiment of the application, and the continuous arrows in the figure indicate the direction in which a part of the light of the light guide light source propagates;
  • FIG. 6 is a schematic structural diagram of a second light supplement module provided by an embodiment of the application.
  • FIG. 7 is a schematic structural diagram of a third light supplement module provided by an embodiment of the application.
  • FIG. 8 is a schematic diagram of a part of the external structure of the mobile terminal shown in FIG. 3;
  • FIG. 9 is a schematic diagram of a part of the external structure of a fourth type of mobile terminal provided by an embodiment of the application.
  • the camera 12 described in the present application includes a lens 121, a Sensor (image sensor) 122, a PCB board (printed circuit board) 123 and a holder 124.
  • Sensor 122 includes but is not limited to CCD (Charged Coupled Device), CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor).
  • the Sensor 122 is fixed on the PCB board 123, and the holder 124 is arranged on the side of the Sensor 122 close to the subject 20 and connected to the PCB board 123.
  • the holder 124 is provided with a cavity for accommodating the lens 121, and the lens 121 is opposite to the Sensor 122.
  • the light of the subject 20 enters the camera 12, the incident light first enters the lens 121, and then reaches the Sensor 122. The photons in the light hit the Sensor 122 to generate movable charges. This is the internal photoelectric effect, and the movable charges are collected and formed
  • the electrical signal undergoes digital-to-analog conversion through an A/D converter, that is, the charge signal is converted into a digital signal, and the digital signal is sent to DSP (Digital Signal Processor) for processing, and finally transmitted to the screen 16 of the terminal device to form
  • DSP Digital Signal Processor
  • the structure of the DSP includes an ISP (Image Signal Processor) and a JPEG encoder (JPEG image decoder).
  • ISP Image Signal Processor
  • JPEG image decoder JPEG image decoder
  • the ISP is the key to determining the smoothness of the image. It is understandable that for CMOS, DSP can be integrated in CMOS. CMOS has the advantages of high integration, low power consumption, and low cost, and is more suitable for mobile phones with limited internal space.
  • the PCB board 123 may be a rigid board, a flexible board, or a rigid-flex board.
  • CMOS can be applied to any one of hard board, soft board or soft-hard combined board.
  • CCD only the soft and hard board can be used, and the price of the soft and hard board is the highest among the above three kinds of boards. Therefore, when the CCD is used, the cost of the mobile phone will be high.
  • the camera may be a macro camera capable of macro shooting.
  • the macro camera refers to the optical capability of the lens 121.
  • the optical magnification refers to the ratio between the imaging height of the sensor and the height of the object.
  • magnification that the user feels optical magnification * screen magnification * digital magnification
  • optical magnification refers to the ratio of the height of the image on the sensor to the height of the subject
  • screen magnification refers to the screen size and the sensor
  • the digital magnification is the ratio of the size of the same part on the screen after the user has artificially enlarged the part of the screen to the size on the screen before the enlargement.
  • an example of the magnification principle of the image that the user feels after shooting is illustrated. As shown in FIG. 2, the light reflected on the object 20 reaches the Sensor 122 after passing through the lens 121, and then generates an electrical signal, which passes through the analog-to-digital conversion device.
  • the electrical signal is converted into a digital signal, after being processed by the DSP digital signal processing chip, it is transmitted to the screen 16 of the mobile terminal to form an image, and the user can enlarge the part of the image on the screen 16 as needed.
  • the displayed image is the enlarged screen image 30.
  • FOV Field Of View
  • the field of view refers to the two sides of the optical instrument with the lens center of the optical instrument as the vertex, and the maximum range of the measured or photographed object that can pass through the lens center.
  • Angle. FOV is usually used to measure the field of view of a lens.
  • the viewing angle of a conventional standard lens is about 45 degrees
  • the viewing angle of the wide-angle lens 121 is above 60 degrees.
  • the lens 121 should be as close as possible to the subject and increase The focal length of the lens 121 is achieved.
  • the working distance refers to the distance from the subject to the front end of the lens.
  • 1/f 1/u+1/v.
  • f the focal length
  • u the object distance
  • v the image distance
  • v and u show opposite trends.
  • macro shooting is a way of shooting at close range to obtain an enlarged image of the subject, that is, the subject becomes a magnified real image on the Sensor. Therefore, when close-up macro shooting, the object distance u is relatively small, which works The distance is correspondingly smaller. Therefore, in order to meet the need of focusing, the focal length of the lens 121 needs to be smaller to ensure that f ⁇ u ⁇ 2f, and the image distance and the object distance meet the above-mentioned Gaussian imaging formula.
  • the camera may also be a super macro camera capable of super macro shooting.
  • Super macro camera refers to a macro camera that can still achieve focus when the working distance is less than 10mm, that is, the sensor can still image clearly when the working distance is less than 10mm. It should be noted that "less than” in the embodiments of the present application does not include the number.
  • the ultra-macro range is 3mm-9mm. In other words, when the working distance is 3mm-9mm, the ultra-macro camera can image, and it can image clearly on the Sensor122.
  • the super macro camera can be a telephoto super macro lens or a wide-angle super macro lens.
  • the focal length f of the wide-angle super macro lens ranges from 1.3 mm to 2.2 mm, and the FOV is 70° to 78°.
  • the effective focal length f of the wide-angle super macro lens is 1.335 mm, and the maximum image
  • the high FOV is 77.6 degrees, the f-number is 2.8, and the working distance is 3mm, the image can be clearly imaged. That is to say, the lens 121 can focus on the subject with a working distance of about 3mm.
  • multiple fingers are greater than or equal to two.
  • the field of view refers to the area where the object can be seen on the screen of the mobile terminal; the object side refers to the side close to the object.
  • the mobile terminals in the embodiments of the present application may include terminal devices such as mobile phones, notebook computers, tablet computers, PDAs (Personal Digital Assistant, personal digital assistants), and portable computers.
  • terminal devices such as mobile phones, notebook computers, tablet computers, PDAs (Personal Digital Assistant, personal digital assistants), and portable computers.
  • the mobile terminal is a mobile phone as an example for description.
  • the mobile terminal 10 includes a camera 12 and a light supplement module 13.
  • the light supplement module 13 includes a light supplement light source 132 and a light guide 131 having a first escape opening 131a.
  • the plane perpendicular to the optical axis A of the camera 12 is the projection surface, and the projection of the end surface of the camera 12 close to the object side on the projection surface is located in the projection of the first escape opening 131a on the projection surface.
  • the end of the light guide 131 close to the object side has a plurality of raised portions 131b arranged at intervals.
  • Each raised portion 131b includes a reflective surface 131c and a light emitting surface 131d corresponding to the reflective surface 131c.
  • the light from the light source 132 enters the light guide.
  • the reflecting surface 131c reflects a part of the light of the supplementary light source 132 to the corresponding light-emitting surface 131d, and the light is refracted on the light-emitting surface 131d, so that a part of the light of the supplementary light source 132 can be guided to the camera through the corresponding light-emitting surface 131d 12 field of view.
  • the plurality of protrusions 131b can guide the light from the supplementary light source 132 to the subject 20 from the peripheral side of the camera 12, and the light reflected on the subject 20 passes through the first escape opening 131a Shoot into the camera 12 to achieve imaging.
  • a plurality of protrusions 131b are spaced apart at one end of the light guide 131 close to the object side, and each protrusion 131b is provided with a reflective surface 131c and a light emitting surface corresponding to the reflective surface 131c.
  • the surface 131d can enable the reflective surface 131c to reflect as much light as possible to the light-emitting surface 131d, thus, as much light as possible can be directed to the field of view of the camera 12 in a limited structural space, so that it can be in close proximity
  • sufficient illumination is provided for the field of view of the camera 12, and further, the object 20 in the field of view can be clearly photographed.
  • the reflective surfaces 131c of the plurality of protrusions 131b in this embodiment are arranged in parallel and spaced apart, and the included angle ⁇ between the reflective surface 131c of one protrusion 131b and the light emitting surface 131d (see FIG. 6) It is the same as the angle ⁇ between the reflective surface 131c of the other protrusion 131b and the light-emitting surface 131d.
  • each reflective surface 131c may intersect the corresponding light-emitting surface 131d to form a sharp corner at the intersection.
  • each reflective surface 131c may not intersect the corresponding light-emitting surface 131d, which is equivalent.
  • the end of each reflecting surface 131c and the corresponding light-emitting surface 131d close to the object side is a flat surface or a curved surface.
  • the included angle ⁇ between the reflective surface 131c and the light emitting surface 131d of the same protrusion 131b ranges from 15° to 45°.
  • each protrusion 131b is perpendicular to the projection surface. In other embodiments, the light-emitting surface 131d of each protrusion 131b may also be arranged obliquely with respect to the projection surface.
  • the light-emitting surfaces 131d of the plurality of protrusions 131b may be arranged in parallel and spaced apart. Each light-emitting surface 131d may be perpendicular to the projection surface, or may be opposite to the projection surface.
  • the angle ⁇ between the reflective surface 131c of the protrusion 131b close to the optical axis A and the corresponding light-emitting surface 131d is greater than the protrusion away from the optical axis A
  • the angle ⁇ between the reflective surface 131c of the portion 131b and the corresponding light-emitting surface 131d, that is, the reflective surfaces 131c of the plurality of protrusions 131b are not parallel, and move from the direction close to the optical axis A to away from the optical axis In the direction of A, the angle ⁇ between the reflective surface 131c and the corresponding light-emitting surface 131d gradually becomes smaller, so that the light guiding effect can be further improved.
  • the angle ⁇ between the reflective surface 131c close to the optical axis A and the corresponding light-emitting surface 131d is smaller than that between the reflective surface 131c far away from the optical axis A and the corresponding reflective surface 131c.
  • the angle ⁇ between the light-emitting surfaces 131d is smaller than that between the reflective surface 131c far away from the optical axis A and the corresponding reflective surface 131c.
  • the light guide 131 of the embodiment of the present application is a continuous ring structure. Specifically, the light guide 131 of the embodiment of the present application is a circular ring.
  • the embodiment of the present application is provided with a plurality of supplementary light sources 132, and the plurality of supplementary light sources 132 are arranged at intervals along the circumferential direction of the camera 12.
  • the angle size can be the same or different.
  • the light guide 131 is not limited to a circular ring shape.
  • the outer ring of the ring-shaped light guide 131 may also be rectangular, triangular, elliptical, irregular, etc.
  • the inner ring may be Any one of circular, rectangular, triangular, elliptical, special shape, etc., that is, the outer ring and inner ring of the ring-shaped light guide 131 can be the same shape or different shapes, which is not limited here.
  • the light guide 131 may not be a continuous ring structure.
  • the light guide 131 may include a plurality of sub-light guides 1311.
  • the light guides 1311 are arranged at intervals to form the first escape opening 131a by surrounding them.
  • one or more supplementary light sources 132 can be provided at the end of each sub-light guide 1311 away from the object side.
  • the supplemental light source 132 in the embodiment of the present application may be any of LED (Light Emitting Diode) lamps, metal halide lamps, fluorescent lamps, high pressure sodium, incandescent lamps, iodine tungsten lamps, and xenon lamps.
  • the supplemental light source 132 is an LED lamp, which has stable operation, low heat generation, low energy consumption, and long service life.
  • the mobile terminal 10 of this embodiment further includes a protective lens 14 and a housing 11 having a receiving cavity 11a.
  • the housing 11 has a second escape hole 11b communicating with the receiving cavity 11a.
  • the camera 12 and the light supplement module 13 are both arranged in the accommodating cavity 11a, and the end of the camera 12 close to the object side and the light guide 131 are both located at the second avoiding hole 11b, and the protective lens 14 is arranged in the second avoiding hole 11b.
  • the protective lens 14 mainly plays a role in protecting the camera 12.
  • the light refracted from the multiple light-emitting surfaces 131d passes through the protective lens 14 and is guided to the field of view of the functional camera 12. Similarly, the light reflected on the object 20 The light also enters the camera 12 after passing through the protective lens 14, and finally achieves imaging.
  • the second escape hole 11 b may further include a first sub-hole 11 c and a second sub-hole 11 d
  • the protective lens 14 includes a first sub-lens 141 and a second sub-lens 142.
  • the second sub-hole 11d is arranged on the peripheral side of the first sub-hole 11c, the end of the camera 12 close to the object side is located at the first sub-hole 11c, and the light guide 131 is located at the second sub-hole 11d.
  • the first sub-lens 141 is disposed in the first sub-hole 11c
  • the second sub-lens 142 is disposed in the second sub-hole 11d.
  • the opening gap of the second sub-hole 11d may be 1 to 3 mm, and the gap between the second sub-hole 11d and the first sub-hole 11c may be 0.5-2 mm, that is, the light refracted from the multiple light-emitting surfaces 131d After passing through the second sub-lens 142, it is directed to the field of view of the functional camera 12, and the light reflected on the subject 20 passes through the first sub-lens 141 and then enters the camera 12, and finally imaging is realized.
  • the end of the camera 12 close to the object side can be inserted into the first escape opening, so that the camera 12 and the light guide 131 can be arranged in the accommodating cavity 11a of the mobile terminal 10. It is more compact to save the internal space of the mobile terminal 10.
  • the light guide 131 is disposed at an end of the camera 12 close to the object side, and the camera 12 is located outside the first escape opening 131a, that is, the end of the camera 12 close to the object side It is not penetrated in the first escape opening 131a, thus, the opening size of the second escape hole 11b on the housing 11 can be reduced.
  • the light guide 131 of this embodiment has an installation space 131f provided on the peripheral side of the first escape opening 131a, and the supplemental light source 132 is provided in the installation space 131f.
  • a part of the end surface of the light guide 131 at the end away from the object side of the embodiment of the present application is recessed toward the direction closer to the object side to form an installation space 131f.
  • a part of the sidewall of the light guide 131 on the side away from the optical axis A may be recessed toward the direction close to the optical axis A to form an installation space 131f.
  • the supplementary light source 132 is arranged in the installation space 131f of the light guide 131. It is convenient to guide light, and can also make the overall structure of the light supplement module 13 more compact.
  • the supplemental light source 132 may also be disposed outside the light guide 131.
  • the light guide 131 is made of a light-transmitting material, in order to prevent the user from seeing the internal structure of the mobile terminal 10 through the light guide 131, referring to FIGS. 3 to 7, the light guide 131 can be moved away from the object side end.
  • the end surface of is set as a non-transmissive surface 131e.
  • the end surface of the light guide 131 at the end away from the object side can be atomized to achieve a frosting effect.
  • setting the end surface of the end of the light guide 131 away from the object side as a non-transmissive surface 131e is mainly for the end surface not serving as the light incident surface of the light source 132, for example, for the light incident surface used in this embodiment
  • the end surface of the light guide 131 far away from the object side can be set as a non-transparent surface 131e, but when the supplementary light source 132 is arranged
  • the end surface of the light guide 131 is used as the light incident surface of the supplementary light source 132, the end surface cannot be set as a non-transmissive surface 131e, and at least the area used as the light incident surface of the end surface cannot be set as non-transmissive. Light zone.
  • the side wall on the side of the light guide 131 away from the optical axis A can also be set as a non-transparent surface.

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Abstract

本申请实施例提供了一种移动终端，包括：摄像头和补光模组；所述补光模组包括补光光源、以及具有第一避让口的导光件；与所述摄像头的光轴垂直的平面为投影面，所述摄像头靠近物侧一端的端面在所述投影面上的投影位于所述第一避让口在所述投影面上的投影中；所述导光件靠近物侧的一端具有多个间隔设置的凸起部，每个所述凸起部包括反射面和与所述反射面对应的出光面，所述补光光源的光线进入所述导光件，所述反射面将所述补光光源的一部分光线反射至对应的所述出光面，并通过对应的所述出光面导向所述摄像头的视场。本申请实施例的移动终端可以在近距离拍摄模式下，为摄像头的视场提供足够的光照，进而，可以清晰地拍摄视场内的被拍摄物。

Description

移动终端
相关申请的交叉引用
本申请基于申请号为202010444229.X、申请日为2020年05月22日以及202020878497.8、申请日为2020年05月22日的中国专利申请提出，并要求上述中国专利申请的优先权，上述中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及成像技术领域，尤其涉及一种移动终端。
背景技术
为了满足用户不同的拍照需求，移动终端上出现了多种功能不同的摄像头，比如，微距摄像头，超微距摄像头，广角摄像头、长焦摄像头等等。使用微距摄像头可以进行近距离的微距拍摄，使用超微距摄像头可以进行超微距拍摄。
相关技术中，用于补光的闪光灯与摄像头的距离较远，当进行近距离微距或超微距拍摄时，由于功能摄像头与被拍摄物之间的距离一般只有几厘米，甚至几毫米，视场内光照度明显不足，无法拍清楚视场内的被拍摄物。
发明内容
有鉴于此，本申请实施例期望提供一种能够为近距离拍摄模式下的视场提供足够光照的移动终端。
为达到上述目的，本申请实施例提供一种移动终端，包括：
摄像头；
补光模组，所述补光模组包括补光光源、以及具有第一避让口的导光件；与所述摄像头的光轴垂直的平面为投影面，所述摄像头靠近物侧一端的端面在所述投影面上的投影位于所述第一避让口在所述投影面上的投影中；所述导光 件靠近物侧的一端具有多个间隔设置的凸起部，每个所述凸起部包括反射面和与所述反射面对应的出光面，所述补光光源的光线进入所述导光件，所述反射面将所述补光光源的一部分光线反射至对应的所述出光面，并通过对应的所述出光面导向所述摄像头的视场。
进一步地，多个所述凸起部的所述反射面平行间隔设置，一个所述凸起部的所述反射面与所述出光面之间的夹角与另一个所述凸起部的所述反射面与所述出光面之间的夹角相同。
进一步地，同一个所述凸起部的所述反射面与所述出光面之间的夹角范围为15°～45°。
进一步地，多个所述凸起部的所述出光面平行间隔设置，相邻的两个所述凸起部中，靠近光轴的所述凸起部的所述反射面与所述出光面之间的夹角大于远离光轴的所述凸起部的所述反射面与所述出光面之间的夹角；或，
多个所述凸起部的所述出光面平行间隔设置，相邻的两个所述凸起部中，靠近光轴的所述凸起部的所述反射面与所述出光面之间的夹角小于远离光轴的所述凸起部的所述反射面与所述出光面之间的夹角。
进一步地，所述出光面与所述投影面垂直；或，所述出光面相对于所述投影面倾斜设置。
进一步地，所述摄像头靠近物侧的一端穿设在所述第一避让口中；或，所述导光件设置在所述摄像头靠近物侧的一端，且所述摄像头位于所述第一避让口的外侧。
进一步地，所述导光件包括多个子导光件，多个所述子导光件间隔设置，以围设形成所述第一避让口。
进一步地，所述补光光源的数量为多个，多个所述补光光源沿所述功能摄像头的周向间隔设置。
进一步地，所述导光件具有设置在所述第一避让口周侧的安装空间，所述补光光源设置在所述安装空间中。
进一步地，所述移动终端还包括保护镜片、以及具有容纳腔的壳体，所述 壳体上具有所述容纳腔连通的第二避让孔；
所述摄像头和所述补光模组均设置在所述容纳腔中，且所述摄像头靠近物侧的一端和所述导光件均位于所述第二避让孔处，所述保护镜片设置在所述第二避让孔中。
进一步地，所述第二避让孔包括第一子孔和第二子孔，所述保护镜片包括第一子镜片和第二子镜片；
所述第二子孔围设在所述第一子孔的周侧，所述摄像头靠近物侧的一端位于所述第一子孔处，所述导光件位于所述第二子孔处；
所述第一子镜片设置在所述第一子孔中，所述第二子镜片设置在所述第二子孔中。
进一步地，所述导光件远离物侧一端的端面为非透光面。
本申请实施例提供了一种移动终端，通过在导光件靠近物侧的一端间隔设置多个具有反射面和出光面的凸起部，可以通过凸起部从摄像头的周侧将补光光源的光线导向被拍摄物，由此，可以在有限的结构空间内将尽可能多的光线导向摄像头的视场，从而，可以在近距离拍摄模式下，为摄像头的视场提供足够的光照，进而，可以清晰地拍摄视场内的被拍摄物。
附图说明
图1为本申请实施例的摄像头的结构示意图；
图2为手机拍摄被拍摄物的示意图；
图3为本申请实施例提供的一种移动终端的局部剖视图，图中连续的箭头表示导光光源的一部分光线传播的方向；
图4为本申请实施例提供的第二种移动终端的局部剖视图，图中连续的箭头表示导光光源的一部分光线传播的方向；
图5为本申请实施例提供的第三种移动终端的局部剖视图，图中连续的箭头表示导光光源的一部分光线传播的方向；
图6为本申请实施例提供的第二种补光模组的结构示意图；
图7为本申请实施例提供的第三种补光模组的结构示意图；
图8为图3中所示的移动终端的部分外部结构示意图；
图9为本申请实施例提供的第四种移动终端的部分外部结构示意图。
具体实施方式
下面结合附图及具体实施例对本申请再作进一步详细的说明。
需要说明的是，在不冲突的情况下，本申请实施例及实施例中的技术特征可以相互组合，具体实施方式中的详细描述应理解为对本申请宗旨的解释说明，不应视为对本申请的不当限制。
请参阅图1和图2，本申请所述的摄像头12包括镜头121、Sensor(图像传感器)122、PCB板(印刷电路板)123和固定器124。Sensor122包括但不限于CCD(Charged Coupled Device，电荷耦合器件)、CMOS(Complementary Metal Oxide Semiconductor，互补金属氧化物半导体)。Sensor122固定在PCB板123上，固定器124设置在Sensor122的靠近被拍摄物20的一侧并与PCB板123连接，固定器124设置有容纳镜头121的空腔，镜头121与Sensor122相对。在拍照过程中，被拍摄物20的光线进入摄像头12，入射光首先进入镜头121，然后到达Sensor122，光线中的光子打到Sensor122上产生可移动电荷，这是内光电效应，可移动电荷汇集形成电信号，经过A/D转换器进行数模转换，即把电荷信号转换成数字信号，数字信号送到DSP(Digital Signal Processor，数字信号处理器)处理，最终传输到终端设备的屏幕16上形成显示图像，即实现了对被拍摄物20的拍照。具体的，DSP的结构包括ISP(Image Signal Processor，图像信号处理器)和JPEG encoder(JPEG图像解码器)，其中，ISP是决定影像流畅的关键。可以理解的是，对于CMOS，可以将DSP集成在CMOS内。CMOS具有集成度高、功耗低、成本低等优点，比较适合内部空间受限的手机。
PCB板123可以是硬板、软板或者软硬结合板。当手机采用CMOS时，CMOS可适用硬板、软板或者软硬结合板中的任何一种。当手机采用CCD，则只能用软硬结合板，而软硬结合板在上述三种板中的价格最高，因此，当采用 CCD时，会导致手机成本偏高。
在一些实施例中，摄像头可以是能够进行微距拍摄的微距摄像头，微距摄像头是指通过镜头121的光学能力，在保证被拍摄物成像清楚的前提下，在距离被拍摄物较近时以较大的光学放大率进行拍摄的摄像头，其中，光学放大率指的是sensor的成像高度与被拍摄物的高度之间的比值。
需要说明的是，用户感受到的放大率＝光学放大率*屏幕放大率*数码放大率，光学放大率指sensor上成像的高度与被拍摄物的高度的比值，屏幕放大率指屏幕尺寸与sensor尺寸的比值，数码放大率是用户人为放大屏幕中部分而产生同一部分的放大后在屏幕上的尺寸与放大前在屏幕上的尺寸的比值。具体地，举例说明用户在拍摄后所感受到的图像的放大原理，如图2所示，被拍摄物20上反射的光线在经过镜头121后到达Sensor122上，然后产生电信号，经过模数转换器件，电信号转换成数字信号，经过DSP数字信号处理芯片处理后，传输到移动终端的屏幕16上形成图像，而用户可在屏幕16上按需对图像的局部进行放大，此时在屏幕16上所显示的图像便为屏幕放大图像30。
具体地，根据基本的光学成像原理，tan(FOV/2)＝成像高度/焦距＝被拍摄物高度/物距，光学放大率＝成像高度/被拍摄物高度＝焦距/物距。其中，FOV(Field Of View)为视场角，视场角是指光学仪器中以光学仪器的镜头中心为顶点，以被测或被拍摄物可通过镜头中心的最大范围的两条边构成的夹角。FOV通常用于衡量镜头的视野范围，例如，常规的标准镜头的视角在45度左右，广角镜头121的视角在60度以上。根据上面的光学放大率的计算公式，要增大光学放大率，可通过减小工作距离或增大焦距来实现，即在保证成像清楚的前提下，镜头121尽可能的靠近被拍摄物和增加镜头121的焦距来实现。其中，工作距离指的是被拍摄物到镜头前端的距离。
根据高斯成像公式，1/f＝1/u+1/v。其中f为焦距；u为物距；v为像距；
当u>2f，被拍摄物在Sensor122上成缩小倒立的实像；
当u＝2f，v＝f，即焦距等于像距，被拍摄物在Sensor122上成等大倒立的实像；
当f<u<2f，被拍摄物在Sensor122上成放大倒立的实像；
当u＝f，被拍摄物在Sensor122上不成像；
当u<f，呈虚像，被拍摄物不能在Sensor122上成实像。
因此，在焦距f不变的情况下，v和u呈相反的变化趋势，u增加，则v减小，u减小，则v增加。由于微距拍摄是一种近距离拍摄以得到放大的被拍摄物的图像的拍摄方式，即被拍摄物在Sensor上成放大的实像，因此，近景微距拍摄时，物距u比较小，工作距离也相应地较小，因此，为了满足合焦的需要，镜头121的焦距需要更小，以保证f<u<2f，且像距和物距满足上述的高斯成像公式。
摄影界国际公认的说法是，达到1∶1～1∶4左右光学放大率的拍摄都属微距摄影，在一些实施例中，摄像头还可以是能够进行超微距拍摄的超微距摄像头。超微距摄像头指的是工作距离小于10mm时仍能够实现合焦的一种微距摄像头，即工作距离小于10mm时sensor仍能够清晰成像。需要说明的是，本申请实施例中的“小于”不包括本数。一实施例中，超微距范围为3mm～9mm。也就是说，当工作距离为3mm～9mm时，超微距摄像头能够成像，在Sensor122上能够清晰成像。
超微距摄像头可以是长焦超微距镜头，也可以是广角超微距镜头。示例性地，广角超微距镜头的焦距f的取值范围为1.3mm～2.2mm，FOV为70°～78°，示例性地，广角超微距镜头的有效焦距f为1.335mm，最大像高处的FOV为77.6度，光圈值(f-number)为2.8，工作距离为3mm的情况下能够清晰成像，也就是说镜头121能够对工作距离在3mm左右的被拍摄物体合焦。
本申请实施例中，多个指大于或等于两个。
本申请实施例中，视场是指在移动终端的屏幕上能够看到被拍摄物的区域；物侧指靠近被拍摄物的一侧。
本申请实施例中的移动终端可以包括手机、笔记本电脑、平板电脑、PDA(Personal Digital Assistant，个人数字助理)和便携计算机等终端设备。为了便于描述，本申请实施例中，以移动终端为手机为例进行描述。
本申请一实施例提供了一种移动终端，请参阅图3，该移动终端10包括：摄像头12和补光模组13。补光模组13包括补光光源132、以及具有第一避让口131a的导光件131。与摄像头12的光轴A垂直的平面为投影面，摄像头12靠近物侧一端的端面在投影面上的投影位于第一避让口131a在投影面上的投影中。导光件131靠近物侧的一端具有多个间隔设置的凸起部131b，每个凸起部131b包括反射面131c和与反射面131c对应的出光面131d，补光光源132的光线进入导光件131，反射面131c将补光光源132的一部分光线反射至对应的出光面131d，光线在出光面131d上发生折射，由此使得补光光源132的一部分光线可以通过对应的出光面131d导向摄像头12的视场。也就是说，在进行拍摄时，多个凸起部131b能够从摄像头12的周侧将补光光源132的光线导向被拍摄物20，被拍摄物20上所反射的光线通过第一避让口131a射入到摄像头12上，以实现成像。
需要说明的是，在实际应用中，补光光源132还有少量的光线在进入相应的凸起部131b之后，不会投射到凸起部131b的反射面131c上，而是会直接投射到凸起部131b的出光面131d上，并且直接在出光面131d上通过折射导向摄像头12的视场，但是，导向摄像头12的视场的大部分光线还是主要来自反射面131c的反射。
本申请实施例的移动终端10，通过在导光件131靠近物侧的一端间隔设置多个凸起部131b，且每个凸起部131b均设置有反射面131c和与反射面131c对应的出光面131d，可以使得反射面131c能够将尽可能多的光线反射至出光面131d上，由此，可以在有限的结构空间内将尽可能多的光线导向摄像头12的视场，从而，可以在近距离拍摄模式下，为摄像头12的视场提供足够的光照，进而，可以清晰地拍摄视场内的被拍摄物20。
请参阅图3和图6，本实施例的多个凸起部131b的反射面131c平行间隔设置，一个凸起部131b的反射面131c与出光面131d之间的夹角α(参阅图6)与另一个凸起部131b的反射面131c与出光面131d之间的夹角α相同。
具体地，请参阅图3，每个反射面131c可以与对应出光面131d相交，以在相交处形成尖角，请参阅图6，每个反射面131c也可以不与对应出光面131d相交，相当于每个反射面131c与对应的出光面131d靠近物侧一端的端部为平面或曲面。可选地，同一个凸起部131b的反射面131c与出光面131d之间的夹角α范围为15°～45°。
本实施例的每个凸起部131b的出光面131d均与投影面垂直，在其它实施方式中，每个凸起部131b的出光面131d也可以相对于投影面倾斜设置。
请参阅图7，在另一实施方式中，也可以是多个凸起部131b的出光面131d平行间隔设置，每个出光面131d既可以均与投影面垂直，也可以均相对于投影面以相同的角度倾斜设置，相邻的两个凸起部131b中，靠近光轴A的凸起部131b的反射面131c与对应的出光面131d之间的夹角α大于远离光轴A的凸起部131b的反射面131c与对应的出光面131d之间的夹角α，也就是说，多个凸起部131b的反射面131c之间不是平行的，从靠近光轴A的方向朝远离光轴A的方向，反射面131c与对应的出光面131d之间的夹角α逐渐变小，由此，可以进一步提高导光效果。在其它实施方式中，也可以是相邻的两个反射面131c中，靠近光轴A的反射面131c与对应的出光面131d之间的夹角α小于远离光轴A的反射面131c与对应的出光面131d之间的夹角α。
请参阅图8，本申请实施例的导光件131为一个连续的环状结构，具体地，本申请实施例的导光件131为圆环形。为提高补光的均匀性，本申请实施例设置了多个补光光源132，多个补光光源132沿摄像头12的周向间隔设置，相邻的两个的补光光源132之间的夹角大小可以相同，也可以不同。
可以理解的是，导光件131也并不限于是圆环形，在其它实施方式中，环状导光件131的外环还可以是矩形、三角形、椭圆形、异形等，内环可以是圆形、矩形、三角形、椭圆形、异形等任意一种，即环状导光件131的外环和内环可以是相同的形状，也可以是不同的形状，在此不做限制。
在其它实施方式中，导光件131也可以不是一个连续的环状结构，比如，请参阅图9，在另一种实施例中，导光件131可以包括多个子导光件1311，多个子 导光件1311间隔设置，以围设形成第一避让口131a。同样地，为提高补光的均匀性，在每个子导光件1311远离物侧的一端都可以设置一个或多个补光光源132。
本申请实施例的补光光源132可以是LED(Light Emitting Diode，发光二极管)灯、金卤灯、荧光灯、高压钠、白炽灯、碘钨灯、氙气灯中的任一种。示例性地，一实施例中，补光光源132为LED灯，LED灯运行稳定，发热量低，低能耗，使用寿命长。
请参阅图3，本实施例的移动终端10还包括保护镜片14、以及具有容纳腔11a的壳体11，壳体11上具有容纳腔11a连通的第二避让孔11b。摄像头12和补光模组13均设置在容纳腔11a中，且摄像头12靠近物侧的一端和导光件131均位于第二避让孔11b处，保护镜片14设置在第二避让孔11b中。保护镜片14主要起到对摄像头12进行保护的作用，从多个出光面131d折射出的光线穿过保护镜片14之后，导向功能摄像头12的视场，同样地，被拍摄物20上所反射的光线也是穿过保护镜片14之后射入到摄像头12上，最终实现成像。
请参阅图4，在另一种实施方式中，第二避让孔11b还可以包括第一子孔11c和第二子孔11d，保护镜片14包括第一子镜片141和第二子镜片142。第二子孔11d围设在第一子孔11c的周侧，摄像头12靠近物侧的一端位于第一子孔11c处，导光件131位于第二子孔11d处。第一子镜片141设置在第一子孔11c中，第二子镜片142设置在第二子孔11d中。第二子孔11d的开孔间隙可以为1～3mm，第二子孔11d与第一子孔11c之间的间隙可以为0.5～2mm，也就是说，从多个出光面131d折射出的光线穿过第二子镜片142之后，导向功能摄像头12的视场，而被拍摄物20上所反射的光线是穿过第一子镜片141之后射入到摄像头12上，最终实现成像。
进一步地，在一种实施方式中，摄像头12靠近物侧的一端可以穿设在第一避让口中，由此，可以使得摄像头12与导光件131在移动终端10的容纳腔11a中能够布置地更加紧凑，以节省移动终端10的内部空间。请参阅图5，在另一种实施方式中，导光件131设置在摄像头12靠近物侧的一端，且摄像头12位 于第一避让口131a的外侧，也就是说，摄像头12靠近物侧的一端没有穿设在第一避让口131a中，由此，可以减小壳体11上的第二避让孔11b的开孔尺寸。
请参阅图3至图7，本实施例的导光件131具有设置在第一避让口131a周侧的安装空间131f，补光光源132设置在安装空间131f中。
具体地，请参阅图3，本申请实施例的导光件131远离物侧一端的端面的一部分朝靠近物侧的方向凹陷，以形成安装空间131f，请参阅图6，在另一实施方式中，也可以导光件131远离光轴A一侧的侧壁的一部分朝靠近光轴A的方向凹陷，以形成安装空间131f将补光光源132设置在导光件131的安装空间131f中，不仅便于导光，还可以使得补光模组13的整体结构能够更加紧凑。
可以理解的是，在其它实施方式中，补光光源132也可以设置在导光件131外。
另外，由于导光件131是由透光材料制成，为了避免用户透过导光件131看见移动终端10的内部结构，请参阅图3至图7，可以将导光件131远离物侧一端的端面设置为非透光面131e，比如，可以将导光件131远离物侧一端的端面进行雾化处理，以达到磨砂效果。
需要说明的是，将导光件131远离物侧一端的端面设置为非透光面131e主要是针对该端面不作为补光光源132的入光面而言，比如，对于本实施例所采用的将补光光源132设置在导光件131的安装空间131f中的结构形式来说，可以将导光件131远离物侧一端的端面设置为非透光面131e，但是，当补光光源132设置在导光件131的外侧，并且该端面作为补光光源132的入光面时，该端面不能全部设置为非透光面131e，该端面上至少作为入光面使用的区域不能设置为非透光区。
在其它实施方式中，也可以将导光件131远离光轴A一侧的侧壁设置为非透光面。
上述仅为本申请的较佳实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (12)

  1. 一种移动终端，包括：
    摄像头；
    补光模组，所述补光模组包括补光光源、以及具有第一避让口的导光件；与所述摄像头的光轴垂直的平面为投影面，所述摄像头靠近物侧一端的端面在所述投影面上的投影位于所述第一避让口在所述投影面上的投影中；所述导光件靠近物侧的一端具有多个间隔设置的凸起部，每个所述凸起部包括反射面和与所述反射面对应的出光面，所述补光光源的光线进入所述导光件，所述反射面将所述补光光源的一部分光线反射至对应的所述出光面，并通过对应的所述出光面导向所述摄像头的视场。
  2. 根据权利要求1所述的移动终端，多个所述凸起部的所述反射面平行间隔设置，一个所述凸起部的所述反射面与所述出光面之间的夹角与另一个所述凸起部的所述反射面与所述出光面之间的夹角相同。
  3. 根据权利要求2所述的移动终端，同一个所述凸起部的所述反射面与所述出光面之间的夹角范围为15°～45°。
  4. 根据权利要求1所述的移动终端，多个所述凸起部的所述出光面平行间隔设置，相邻的两个所述凸起部中，靠近光轴的所述凸起部的所述反射面与所述出光面之间的夹角大于远离光轴的所述凸起部的所述反射面与所述出光面之间的夹角；或，
    多个所述凸起部的所述出光面平行间隔设置，相邻的两个所述凸起部中，靠近光轴的所述凸起部的所述反射面与所述出光面之间的夹角小于远离光轴的所述凸起部的所述反射面与所述出光面之间的夹角。
  5. 根据权利要求1-4任意一项所述的移动终端，所述出光面与所述投影面垂直；或，所述出光面相对于所述投影面倾斜设置。
  6. 根据权利要求1-4任意一项所述的移动终端，所述摄像头靠近物侧的一端穿设在所述第一避让口中；或，所述导光件设置在所述摄像头靠近物侧的一 端，且所述摄像头位于所述第一避让口的外侧。
  7. 根据权利要求1-4任意一项所述的移动终端，所述导光件包括多个子导光件，多个所述子导光件间隔设置，以围设形成所述第一避让口。
  8. 根据权利要求1-4任意一项所述的移动终端，所述补光光源的数量为多个，多个所述补光光源沿所述功能摄像头的周向间隔设置。
  9. 根据权利要求1-4任意一项所述的移动终端，所述导光件具有设置在所述第一避让口周侧的安装空间，所述补光光源设置在所述安装空间中。
  10. 根据权利要求1-4任意一项所述的移动终端，所述移动终端还包括保护镜片、以及具有容纳腔的壳体，所述壳体上具有所述容纳腔连通的第二避让孔；
    所述摄像头和所述补光模组均设置在所述容纳腔中，且所述摄像头靠近物侧的一端和所述导光件均位于所述第二避让孔处，所述保护镜片设置在所述第二避让孔中。
  11. 根据权利要求10所述的移动终端，所述第二避让孔包括第一子孔和第二子孔，所述保护镜片包括第一子镜片和第二子镜片；
    所述第二子孔围设在所述第一子孔的周侧，所述摄像头靠近物侧的一端位于所述第一子孔处，所述导光件位于所述第二子孔处；
    所述第一子镜片设置在所述第一子孔中，所述第二子镜片设置在所述第二子孔中。
  12. 根据权利要求1-4任意一项所述的移动终端，所述导光件远离物侧一端的端面为非透光面。
PCT/CN2021/081250 2020-05-22 2021-03-17 移动终端 WO2021232911A1 (zh)

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