CN212259082U - Terminal equipment - Google Patents

Abstract

The embodiment of the application provides a terminal device, including camera, light filling lamp and optic fibre, optic fibre will the light direction of light filling lamp the visual field of camera. According to the terminal equipment, light emitted by the light supplementing lamp enters the optical fiber, and enters the view field of the camera from the light emitting surface of the optical fiber after optical fiber transmission, so that light supplementing of the view field of the camera is realized. The optical fiber has relatively small pipe diameter and can be flexibly bent into a required shape, so that the bending shape can be properly adjusted according to other stacking structures around the camera, the adaptability is good, and the design freedom of the other stacking structures around the camera can be increased; in addition, optical fiber only occupies little installation space, reduces the influence to other stacked structure around the camera for terminal equipment's compact structure is favorable to terminal equipment complete machine frivolous design, for example, can be with terminal equipment complete machine gross thickness control within 9mm, promotes user experience and feels.

Description

Terminal equipment

Technical Field

The utility model belongs to the technical field of the formation of image, especially, relate to a terminal equipment.

Background

The light supplement lamp of the existing mobile phone lens is far away from the lens, when the short-distance ultra-micro distance shooting is carried out, the distance between the lens and an object distance is very close to the object distance and can be only a few millimeters, and the illumination in a view field is obviously insufficient at the moment, so that objects in the view field can not be shot clearly.

SUMMERY OF THE UTILITY MODEL

In view of this, the present disclosure provides a terminal device capable of performing light supplement in a short-distance shooting.

The embodiment of the application provides a terminal device, including camera, light filling lamp and optic fibre, optic fibre will the light direction of light filling lamp the visual field of camera.

In some embodiments, the terminal device includes a protection lens disposed on the object side of the camera, and the light exit surface of the optical fiber is located on a side of the protection lens close to the camera.

In some embodiments, the terminal device includes a protection lens disposed on the camera object side, the protection lens is provided with a receiving hole, and the optical fiber is inserted into the receiving hole.

In some embodiments, the number of the optical fibers is multiple, and the light emitting surfaces of the optical fibers are arranged at intervals along the circumferential direction of the camera.

In some embodiments, the luminous intensity of at least one of the fill-in lamps can be varied to adjust the illuminance in the field of view.

In some embodiments, the light exit surface of the optical fiber is an inclined surface inclined toward an extension line of an optical axis of the camera.

In some embodiments, the terminal device includes a main board, the camera is located on one side of the main board, and the camera and the main board are arranged at intervals along an optical axis direction of the camera.

In some embodiments, the terminal device includes a lens unit disposed between the fill light and the optical fiber, and the lens unit couples light of the fill light into the optical fiber.

In some embodiments, one end of the optical fiber has an expansion structure, and the light emitting surface of the light supplement lamp is accommodated in the expansion structure.

In some embodiments, the camera is capable of imaging with a working distance in the ultramicro range, the ultramicro range being 3mm to 10 mm.

According to the terminal equipment, light emitted by the light supplementing lamp enters the optical fiber, and enters the view field of the camera from the light emitting surface of the optical fiber after optical fiber transmission, so that light supplementing of the view field of the camera is realized. The optical fiber has relatively small pipe diameter and can be flexibly bent into a required shape, so that the bending shape can be properly adjusted according to other stacking structures around the camera, the adaptability is good, and the design freedom of the other stacking structures around the camera can be increased; in addition, optical fiber only occupies little installation space, reduces the influence to other stacked structure around the camera for terminal equipment's compact structure is favorable to terminal equipment complete machine frivolous design, for example, can be with terminal equipment complete machine gross thickness control within 9mm, promotes user experience and feels.

Drawings

Fig. 1 is a schematic structural diagram of a camera according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a mobile phone shooting a subject;

fig. 3 is a partial structural diagram of a terminal device according to an embodiment of the present application, in which a dotted arrow illustrates a propagation path of light;

fig. 4 is a partial structural diagram of a terminal device according to another embodiment of the present application, in which a dotted arrow illustrates a propagation path of light.

Reference numerals:

a terminal device 10; a main board 11; a front case 12; a screen 13; a fill-in lamp 14; an optical fiber 15; a protective lens 16; an object 17; a subject real image 17'; screen magnified image 17 "; a camera 20; a lens 21; a Sensor 22; a PCB board 23; a holder 24; a main camera 31; a sub-camera 32; floodlight 33

Detailed Description

The present application will now be described in further detail with reference to the accompanying drawings and specific examples.

It should be noted that, in the case of no conflict, the technical features in the examples and examples of the present application may be combined with each other, and the detailed description in the specific embodiments should be interpreted as an explanation of the gist of the present application and should not be construed as an improper limitation of the present application.

In the description of the present application, the "thickness" orientation or positional relationship is based on the orientation or positional relationship shown in fig. 3, and the "thickness" direction is the up-down direction shown in fig. 3. It is to be understood that such directional terms are merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application.

The terminal device 10 in the embodiment of the present application may include a mobile phone, a notebook computer, a tablet computer, a PDA (Personal Digital Assistant), a portable computer, and the like. For convenience of description, in the embodiment of the present application, the terminal device 10 is described as an example of a mobile phone.

Referring to fig. 3 and 4, the terminal device 10 includes a camera 20, an optical fiber 15, and a fill-in light 14. Illustratively, the terminal device 10 further includes a front case 12, a rear cover, a screen 13, and a main board 11. Preceding shell 12 encloses jointly with the backshell and establishes to be accommodation space, and mainboard 11 and camera 20 set up in accommodation space, and screen 13 sets up in the one side that preceding shell 12 deviates from the back lid.

The camera 20 in the embodiment of the present application can implement close-range shooting, and specifically, referring to fig. 1, the camera 20 includes a lens 21, a Sensor (image Sensor) 22, a PCB 23, and a holder 24. The Sensor22 includes but is not limited to a CCD (Charge Coupled Device), a CMOS (Complementary Metal Oxide Semiconductor). The Sensor22 is fixed on the PCB 23, the holder 24 is disposed on the side of the Sensor22 close to the subject 17 and connected to the PCB 23, the holder 24 is provided with a cavity for accommodating the lens 21, and the lens 21 is opposite to the Sensor 22. In the photographing process, light of the object 17 enters the camera 20, incident light firstly enters the lens 21, an inverted real image 17' of the object is formed through the lens 21, then the incident light reaches the Sensor22, photons in the light strike the Sensor22 to generate movable charges, which are internal photoelectric effects, the movable charges are collected to form electric signals, the electric signals are subjected to Digital-to-analog conversion through an a/D converter, namely the electric signals are converted into Digital signals, the Digital signals are sent to a Digital Signal Processor (DSP) for processing, and finally the Digital signals are transmitted to the screen 18 of the terminal device 10 to form a display image, namely photographing of the object 17 is achieved. Specifically, the DSP includes an ISP (Image Signal Processor) and a JPEG encoder (JPEG Image decoder), wherein the ISP is a key for determining the smoothness of the Image. It will be appreciated that for CMOS, the DSP may be integrated within the CMOS. The CMOS has the advantages of high integration level, low power consumption, low cost and the like, and is more suitable for mobile phones with limited installation space.

The PCB board 23 may be a hard board, a soft board, or a rigid-flex board. When the mobile phone adopts the CMOS, the CMOS can be applied to any one of a hard board, a soft board, or a rigid-flex board. When the mobile phone adopts the CCD, only the rigid-flexible board can be used, and the rigid-flexible board has the highest price among the three boards, so that when the CCD is adopted, the cost of the mobile phone is higher.

In some embodiments, the camera 20 may be a macro camera, which refers to a camera 20 that performs shooting at a larger optical magnification when being closer to the object under the premise of ensuring that the object is clearly imaged, through the optical power of the lens 21, where the optical magnification refers to a ratio between an imaging height of the sensor and a height of the object.

It should be noted that, the magnification sensed by the user is an optical magnification, i.e., a screen magnification, i.e., a digital magnification, the optical magnification refers to a ratio of a height of an image formed on the sensor to a height of the subject, the screen magnification refers to a ratio of a screen size to a sensor size, and the digital magnification is a ratio of a size on the screen after the user manually enlarges a part of the screen to generate enlargement of the same part to a size on the screen before enlargement. Specifically, to illustrate the principle of enlarging an image sensed by a user after shooting, as shown in fig. 2, light reflected by a shot object 17 passes through a lens 21 and then reaches a Sensor22, then an electric signal is generated and converted into a digital signal by an analog-to-digital conversion device, and the digital signal is processed by a DSP digital signal processing chip and then transmitted to a screen of the terminal device 10 to form an image, and the user can enlarge a part of the image on the screen 18 as needed, and the image displayed on the screen 18 is a screen enlarged image 17 ″.

Specifically, according to the basic optical imaging principle, tan (FOV/2) is the imaging height/focal length which is the subject height/object distance, and the optical magnification is the imaging height/subject height which is the focal length/object distance. Wherein, fov (field Of view) is the angle Of view, which is the angle formed by two sides Of the optical instrument that the center Of the lens Of the optical instrument is the vertex and the measured or shot object can pass through the maximum range Of the center Of the lens. The FOV is typically measured as the field of view of the lens, e.g., a conventional standard lens with an angle of view around 45 degrees and a wide-angle lens with an angle of view above 60 degrees. According to the above formula for calculating the optical magnification, the increase of the optical magnification can be realized by reducing the working distance or increasing the focal length, that is, on the premise of ensuring clear imaging, the lens is as close to the object to be shot as possible and the focal length of the lens is increased. The working distance is a distance from the subject to the front end of the lens.

According to the gaussian imaging formula, 1/f is 1/u + 1/v. Wherein f is the focal length; u is the object distance; v is the image distance;

when u is more than 2f, the shot object forms a reduced inverted real image on the Sensor 22;

when u is 2f, v is f, namely the focal length is equal to the image distance, the shot object forms an equal-size inverted real image on the Sensor 22;

when f < u <2f, the shot object forms an enlarged inverted real image on the Sensor 22;

when u is f, the shot does not image on the Sensor 22;

when u < f is a virtual image, the subject cannot be imaged on Sensor22 in real.

Therefore, v and u have opposite changing trends with constant focal length f, and v decreases with increasing u and v increases with decreasing u. Since macro photography is a photography method for obtaining an enlarged image of an object in a close range, that is, the object is an enlarged real image on a Sensor, when close range macro photography is performed, the object distance u is relatively small, and the working distance is also relatively small, so that the focal length of the lens 21 needs to be smaller to satisfy the requirement of focusing, so as to ensure that f < u <2f, and the image distance and the object distance satisfy the above gaussian imaging formula.

The internationally acknowledged statement in the photographic world is that the shooting with optical magnification of about 1: 1-1: 4 belongs to macro photography, and in the embodiment of the application, the ultra-macro camera refers to a macro lens which can still realize focusing when the working distance is less than 10mm, namely, the sensor can still clearly image when the working distance is less than 10 mm.

The macro camera 20 may be a telephoto or a wide-angle macro lens. Illustratively, the focal length f of the wide-angle ultramicro lens ranges from 1.3mm to 2.2mm, and the FOV is 70 to 78 °, illustratively, the effective focal length f of the wide-angle ultramicro lens is 1.335mm, the FOV at the maximum image height is 77.6 degrees, the aperture value (f-number) is 2.8, and clear imaging can be achieved when the working distance is 3mm, that is, the lens 21 can focus on a shot object with the working distance of about 3mm, in this embodiment, the ultramicro range is 3mm to 10 mm.

In the embodiment of the present application, the field of view refers to an area where a subject can be seen on the screen of the terminal device 10; the object side refers to a side close to the subject.

In the related art, for some cameras 20, for example, macro cameras and super-macro cameras, when shooting in macro or super-macro mode, because the distance between the camera 20 and the object to be shot is generally only 1-2 cm, even only a few millimeters, in order to ensure that the illumination in the field of view can meet the shooting requirement, light needs to be supplemented to the field of view.

For this reason, in the embodiment of the present application, please refer to fig. 3 and 4, the optical fiber 15 guides the light of the fill-in lamp 14 to the field of view of the camera 20.

In the terminal device 10 of the embodiment of the present application, light emitted by the light supplement lamp 14 enters the optical fiber 15, and enters the field of view of the camera 20 from the light emitting surface of the optical fiber 15 after being transmitted by the optical fiber 15, so as to supplement light to the field of view of the camera 20. The optical fiber 15 has a relatively small pipe diameter and can be flexibly bent into a required shape, so that the bending shape can be appropriately adjusted according to other stacking structures around the camera 20, the adaptability is good, and the design freedom of the other stacking structures around the camera 20 can be increased; in addition, the optical fiber 15 only occupies a small installation space, and the influence on other stacking structures around the camera 20 is reduced, so that the terminal device 10 is compact in structure, and the terminal device 10 is beneficial to the light and thin design of the whole machine, for example, the total thickness of the terminal device 10 can be controlled within 9mm, and the user experience is improved.

It should be noted that the light supplement lamp 14 may be automatically turned on when the close-range shooting mode is turned on; in the close-range shooting mode, the terminal device 10 may determine whether to turn on the fill light 14 according to the illuminance of the field of view; it may also be opened manually by the user, without limitation.

In an embodiment, in order to make the field of view of the camera 20 have more uniform light supplement light, the light supplement lamps 14 are multiple in number, the optical fibers 15 are multiple in number, and the light exit surfaces of the optical fibers 15 are arranged at intervals along the circumferential direction of the camera 20.

In one embodiment, the light intensity of at least one fill-in light 14 can be varied to adjust the illumination in the field of view. For example, the terminal device determines the intensity without fill-in light according to the illuminance of the field of view, so as to control the light-emitting intensity of the fill-in light 14, for example, when the illuminance of the field of view is lower than a preset value, the light-emitting intensity of the fill-in light 14 is increased; when the illuminance of the field of view is lower than the preset value, the light intensity of the fill-in lamp 14 is reduced.

In an embodiment where the number of the light supplement lamps 14 is multiple, the light emitting intensity of all the light supplement lamps 14 may be adjustable, or only part of the light supplement lamps 14 may be adjustable. The relative illumination in the field of view can be adjusted by independently adjusting the luminous intensity between the light supplement lamps 14.

The fill Light 14 may be any one of an LED (Light Emitting Diode) lamp, a metal halide lamp, a fluorescent lamp, a high-voltage sodium lamp, an incandescent lamp, a tungsten-iodine lamp, and a xenon lamp. Illustratively, in an embodiment, the light supplement lamp 14 is an LED lamp, and the LED lamp operates stably, generates low heat, consumes low energy, and has a long service life.

In an embodiment, referring to fig. 3, the terminal device includes a protection lens 16 disposed on an object side of the camera 20, and the light exit surface of the optical fiber 15 is located on a side of the protection lens 16 close to the camera 20. That is, the optical fiber 15 does not penetrate the protective lens 16.

In another embodiment, referring to fig. 4, the protection lens 16 has a receiving hole, and the optical fiber 15 is inserted into the receiving hole. It is understood that the receiving hole may be a through hole or a blind hole. In the embodiment where the receiving hole is a through hole, the light from the optical fiber 15 does not enter the protection lens 16, but is directly guided to the field of view of the camera 20, so that the light energy loss is small and the light guiding efficiency is high. In the embodiment that the accommodating hole is a blind hole, the end of the optical fiber 15 is located in the accommodating hole, but the optical fiber 15 does not penetrate through the protective lens 16, on one hand, the accommodating hole has a positioning effect on the light emitting position of the optical fiber 15, so as to prevent the optical fiber 15 from being displaced relative to the protective lens 16, on the other hand, the light emitted from the optical fiber 15 does not need to penetrate through the whole protective lens 16, and the loss of light energy can be reduced to a certain extent.

In one embodiment, the light exit surface of the optical fiber 15 is an inclined surface inclined toward the extension line of the optical axis of the camera 20. The light emitted from the optical fiber 15 can be collected to the field of view of the camera 20, so that the illumination in the field of view is improved, and the utilization rate of the light is improved.

In the embodiment of the present application, the optical axis direction of the camera 20 is the same as the thickness direction of the terminal device.

In some embodiments, referring to fig. 3 and 4, the terminal device includes a main board 11, and the camera 20 is located on one side of the main board 11, and the camera 20 is spaced apart from the main board 11 along an optical axis direction of the camera 20. In this embodiment, since the optical fiber 15 is used for guiding light, the optical fiber 15 does not additionally increase the installation space along the optical axis direction of the camera 20, that is, the optical fiber 15 basically does not substantially affect the thickness of the terminal device 10, so that the terminal device 10 can be made thinner and lighter without performing a board breaking design on the main board 11.

The Optical Fiber 15 is not limited to a specific type, and may be a quartz Optical Fiber, a Plastic Optical Fiber (POF), or other types of Optical fibers 15. The optical fiber 15 is mainly used for guiding light, and therefore, the optical fiber 15 is not limited to the optical fiber 15 for communication, and a common plastic optical fiber can also satisfy the use requirement.

The plastic optical fiber has the characteristics of light weight, flexibility, vibration resistance, bending resistance, excellent tensile strength, durability, small occupied space and low cost. Due to the large diameter and numerical aperture of the plastic optical fiber, the light transmission capability is large. Due to the large diameter, the optical coupling connection of the plastic optical fiber and other optical devices is easier.

It can be understood that plastic optical fibers for communication mostly adopt optical fibers with the diameter of 1mm, which is 8-20 times of quartz optical fibers. The optical coupling of thick plastic fibers is much easier than that of quartz fibers. Therefore, in the embodiment using the plastic optical fiber, the light-incident end surface of the plastic optical fiber can be directly aligned to the light supplement lamp 14, and the area of the light-emitting surface of the light supplement lamp 14 is matched with the cross-sectional area of the plastic optical fiber, so that most of the light emitted by the light supplement lamp 14 can enter the plastic optical fiber; moreover, the cross-sectional size of the plastic optical fiber is relatively large, so that the requirement on the light emitting area of the light supplement lamp 14 is low, the manufacturing difficulty of the light supplement lamp 14 cannot be increased additionally, and the manufacturing cost of the terminal device 10 cannot be increased additionally.

In some embodiments, the terminal device 10 includes a lens unit disposed between the fill-in lamp 14 and the optical fiber 15, and the lens unit couples the light of the fill-in lamp 14 into the optical fiber 15. In this embodiment, regardless of the thickness of the optical fiber 15, a large amount of light from the fill-in lamp 14 can be coupled into the optical fiber 15 by providing the lens unit.

The lens unit may be a single lens, or may be a lens group formed by a plurality of lenses, which is not limited herein as long as the light of the fill-in light 14 can be coupled into the optical fiber 15.

In other embodiments, the one end of optical fiber 15 is provided with the expanded structure, and the play plain noodles of light filling lamp 14 holds in the expanded structure, that is to say, stretch into optical fiber 15's tip with light filling lamp 14 partial structure in, so can make in the light that light filling lamp 14 sent all gets into optical fiber 15, greatly promote light energy utilization of light filling lamp 14.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A terminal device, comprising:

a camera;

a light-compensating lamp is arranged on the light-compensating lamp,

and the optical fiber guides the light of the light supplementing lamp to the view field of the camera.

2. The terminal device according to claim 1, wherein the terminal device includes a protection lens disposed on the camera object side, and a light exit surface of the optical fiber is located on a side of the protection lens close to the camera.

3. The terminal device according to claim 1, wherein the terminal device includes a protective lens disposed on the camera object side, the protective lens being provided with a receiving hole, the optical fiber being inserted into the receiving hole.

4. The terminal device according to claim 1, wherein the number of the optical fibers is multiple, and light emitting surfaces of the multiple optical fibers are arranged at intervals along a circumferential direction of the camera.

5. The terminal device of claim 1, wherein the light intensity of at least one of the fill lights is variable to adjust the illumination in the field of view.

6. The terminal device according to claim 1, wherein the light exit surface of the optical fiber is an inclined surface inclined toward an extension of an optical axis of the camera.

7. The terminal device according to claim 1, wherein the terminal device comprises a main board, the camera is located on one side of the main board, and the camera is spaced from the main board along an optical axis direction of the camera.

8. The terminal device according to any one of claims 1 to 7, wherein the terminal device comprises a lens unit disposed between the fill light and the optical fiber, and the lens unit couples light from the fill light into the optical fiber.

9. The terminal device according to any one of claims 1 to 7, wherein one end of the optical fiber has an expanding structure, and the light emitting surface of the fill light is accommodated in the expanding structure.

10. The terminal device according to any one of claims 1 to 7, wherein the camera is capable of imaging with a working distance in the macro range, the macro range being 3mm to 10 mm.

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