CN203966475U - There is the LED display system of multiple cameras - Google Patents
There is the LED display system of multiple cameras Download PDFInfo
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- CN203966475U CN203966475U CN201420220648.5U CN201420220648U CN203966475U CN 203966475 U CN203966475 U CN 203966475U CN 201420220648 U CN201420220648 U CN 201420220648U CN 203966475 U CN203966475 U CN 203966475U
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Abstract
Have the LED display system of multiple cameras, this LED display system comprises: CCD camera assembly, and this CCD camera assembly comprises more than two pick-up lens; LED display, this LED display comprises LED luminescence unit and printed circuit board (PCB), described printed circuit board (PCB) also comprises the mounting hole identical with described pick-up lens quantity, and each described pick-up lens is housed inside in a described mounting hole, and the front end face of this pick-up lens is towards the emission side of described LED display.LED display system of the present utility model has utilized more than two pick-up lens to carry out image acquisition, can meet the requirement of various application to image acquisition.
Description
Technical field
The utility model relates to display technique field, particularly relates to a kind of LED display system with multiple cameras.
Background technology
In prior art, the various requirement and applications that display system is combined with camera system are more and more, such as video conferencing system, interaction game system etc.As the structural representation that Fig. 1 is a kind of video conferencing system of the prior art, as shown in Figure 1, video conferencing system comprises tv display screen 110 and CCD camera assembly 120.Tv display screen 110 is for showing the picture of far-end transmission, and CCD camera assembly 120 is positioned at the top of tv display screen 110, for gathering image information.But in fact, participant is generally seated at the dead ahead of tv display screen 110 and looks at tv display screen 110 straight, due to angle problem, can not photograph face all positive in the time taking for CCD camera assembly 120, thereby far-end participant cannot face completely with local participant, cause inharmonious on sense organ to participant, and cannot know more information.
In fact, it is not video conferencing system, other some systems, for example there is the display device of interaction function, this display device obtains picture by camera and is presented on display screen through certain processing, its camera is also mounted in top or the side of display screen, thereby likely allows experiencer feel inharmonious to picture personage.In addition, because camera cannot photograph the other side in front, judge for subsequent analysis thereby cannot accurately obtain the characteristic informations such as limb action.In order to obtain better image effect, prior art also occur respectively above display screen, the scheme of establishing multiple cameras on two side bodies, to obtain the better image of effect, but still cannot obtain desirable result by combinatory analysis subsequent treatment.Particularly along with the development of various application, the demand of accuracy that multiple cameras and the image information to camera collection are set in system is also strong all the more, only is also still difficult to address the above problem by the pick-up lens that improves CCD camera assembly.
Optimal result is camera can be arranged on to display screen area and can't block display screen picture, and conventionally there is a technology prejudice in those skilled in the art, that is exactly that camera can only be mounted on the housing of display screen outside, the mounting hole of camera cannot be set in display screen area, therefore not occur so far camera to be arranged on the technical scheme of display screen area.
Utility model content
The technical matters that the utility model embodiment mainly solves has been to provide a kind of Information Monitoring and has had more accurately the LED display system of multiple cameras.
For achieving the above object, the utility model has adopted following technical scheme:
Have a LED display system for multiple cameras, this LED display system comprises: CCD camera assembly, and this CCD camera assembly comprises more than two pick-up lens; LED display, this LED display comprises LED luminescence unit and printed circuit board (PCB), described printed circuit board (PCB) also comprises the mounting hole identical with described pick-up lens quantity, and each described pick-up lens is housed inside in a described mounting hole, and the front end face of this pick-up lens is towards the emission side of described LED display.
Further, described CCD camera assembly comprises two horizontally or the pick-up lens that can be used for producing 3D rendering of homeotropic alignment setting, and the distance W between two pick-up lenss is 55-65 millimeter.
Further, described LED display system also comprises 3D rendering processing module, and this 3D rendering processing module receives the image information that described CCD camera assembly is obtained, and produces 3D rendering according to this image information, and this 3D rendering can be passed to described LED display.
Further, described LED display system also comprises the 3 D grating of the realized bore hole 3D that is arranged on LED luminescence unit dead ahead, on described 3 D grating, is provided with aperture or transparent glasses lens or optical filter with described mounting hole corresponding position.
Further, the front end face of described pick-up lens is provided with between the surface of LED luminescence unit and the light-emitting area of described LED luminescence unit at described printed circuit board (PCB).
Further, the front end face of described pick-up lens is between the light-emitting area and 3 D grating of LED luminescence unit.
Further, described LED display shows that by polylith LED module is spliced, described 3 D grating shows that by polylith and LED the 3 D grating piece that module mate is spliced, and described 3 D grating piece is fixed on the printed circuit board (PCB) of LED demonstration module and is positioned at LED luminescence unit dead ahead.
Further, described LED display system also comprises the communication module that can carry out video conference communication transmission, the 3D rendering that described communication module can produce 3D rendering processing module send other end of video conference to, and vision signal that can other end of receiver, video meeting sends to 3D rendering processing module.
Further, described CCD camera assembly comprises and is arranged on the camera that is applicable to interactive game by three on three perpendicular line of the LED display quartern.
Further, described LED display shows that by polylith LED module is spliced, and part LED shows that module is provided with multiple mounting holes that can be used for adjusting camera installation site.
In the utility model embodiment, CCD camera assembly comprises more than two pick-up lens, the printed circuit board (PCB) of LED display also comprises the mounting hole identical with pick-up lens quantity, and each pick-up lens is housed inside in a mounting hole, thereby display system has utilized more than two pick-up lens to carry out image acquisition, can meet the requirement of various application to image acquisition.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of video conferencing system of the prior art;
Fig. 2 a is the three-dimensional structure diagram of an embodiment of the utility model LED display system;
Fig. 2 b is the structural representation of LED display 210 shown in Fig. 2 a;
Fig. 2 c is the vertical view in the A-A cross section of LED display system shown in Fig. 2 b;
Fig. 3 is the embodiment schematic diagram that the utility model LED display system is applied to 3D field;
Fig. 4 is a system construction drawing of LED display system shown in Fig. 3;
Fig. 5 is another embodiment schematic diagram that LED display system of the present utility model is applied to 3D field;
Fig. 6 is another embodiment schematic diagram that LED display system of the present utility model is applied to 3D field;
Fig. 7 is the embodiment schematic diagram that LED display system of the present utility model is applied to interactive game;
Fig. 8 is a system construction drawing of LED display system shown in Fig. 7;
Fig. 9 is the structural representation of LED display in prior art;
Figure 10 is the structural representation of the utility model LED display one embodiment;
Figure 11 is the structural representation that the LED shooting of the LED display shown in Figure 10 shows module;
Figure 12 is the structural representation of the another embodiment of the utility model LED display;
Figure 13 is the structural representation that the LED of the LED display shown in Figure 11 shows module.
Embodiment
Below in conjunction with drawings and embodiments, the utility model embodiment is elaborated.
Refer to Fig. 2 a, Fig. 2 a is the utility model LED (Light Emitting Diode, light emitting diode) three-dimensional structure diagram of an embodiment of display system, as shown in Figure 2 a, LED display system comprises LED display 210 and CCD camera assembly 220, CCD camera assembly 220 comprises pick-up lens 221 and pick-up lens 222, and LED display 210 comprises LED luminescence unit 212 and printed circuit board (PCB) 211.
Fig. 2 b is the structural representation of LED display 210 shown in Fig. 2 a, and as shown in Figure 2 b, printed circuit board (PCB) 211 also comprises mounting hole 211a and 211b, and the mounting hole 211a here and mounting hole 211b are manhole.LED luminescence unit 212 is weldingly fixed on the front surface of printed circuit board (PCB) 211.LED luminescence unit 212 is single or the encapsulation unit of plural LED chip, and in actual applications, the quantity of LED luminescence unit 212 can design according to actual quantity.
In some display system practical applications, as video conferencing system, advertisement machine, interaction game machine etc., owing to watching the spectators of display system to get used to watching in the position of the right opposite of display screen, and in prior art, pick-up lens is arranged at upside, downside or the left and right sides of display screen substantially, thereby making pick-up lens is not to face spectators completely, the characteristic information that causes pick-up lens to gather is inaccurate.Therefore, obtain the accuracy of characteristic information in order to improve pick-up lens, the utility model is arranged on multiple pick-up lenss in the viewing area of LED display, be fixed on the back side of LED display, when spectators watch LED display, pick-up lens can face spectators, improves the precision of Information Monitoring.The multiple pick-up lenss that arrange, can select according to customer location the pick-up lens of optimum position, can also carry out analyzing and processing, synthetic according to the image that need to take multiple pick-up lenss of application system, to obtain better effect.
Conventionally there is a technology prejudice in those skilled in the art, that is exactly that camera can only be mounted on outside display, for example be positioned on display screen frame in addition, or be positioned over after the display screen with transparent window, cannot be arranged in the viewing area of display screen leading portion.Because display screen of the prior art is liquid crystal display, plasma substantially, punching or arrange that the technique of transparent region is will be quite complicated, cost is very high on display screen, and can change the production technology of display screen, cannot implement.
If inventor of the present utility model finds CCD camera assembly and LED (Light-Emitting Diode, light emitting diode) display screen to combine and can obtain unforeseeable good result through research.Because LED display comprises LED luminescence unit and printed circuit board (PCB), on printed circuit board (PCB), drilling technology is relatively ripe, and cost is lower, and between LED luminescence unit, itself is with regard to gapped existence, and therefore, punching itself can obviously not destroy the globality of picture.
Particularly, Fig. 2 c is the vertical view in the A-A cross section of LED display system shown in Fig. 2 b, and as shown in Figure 2 c, pick-up lens 221 is housed inside in mounting hole 211a, and the front end face of this pick-up lens 221 is towards the emission side of LED display 210.Angle and the sharpness of taking are all very good, and the LED display thickness of integrated CCD camera assembly is also very thin.Printed circuit board (PCB) when punching mounting hole 211a can occupy according to actual conditions the position of a LED luminescence unit, region that also can be between LED luminescence unit.
Both indentation mounting hole 211a slightly of the front end face of pick-up lens 221, also can exceed mounting hole 211a.In actual design, find, pick-up lens 221 exceeds through hole 211a and likely can block too much the emergent light of LED luminescence unit 212, the pick-up lens 221 indentation through holes 211 impact visual angle of finding a view likely too much.Therefore, preferably, the front end face of pick-up lens 221 is positioned between the front surface (being provided with the surface of LED luminescence unit 212) and the light-emitting area of LED luminescence unit 212 of printed circuit board (PCB) 211, now neither can block the emergent light of LED luminescence unit 212, make again the visual angle of finding a view of pick-up lens 221 larger.
In order CCD camera assembly 220 to be fixed on printed circuit board (PCB) 211 to the surface of LED luminescence unit 212 dorsad, in the present embodiment, the back side of printed circuit board (PCB) 211 also comprises pad 211b is set, and this pad 211b is distributed in the side of mounting hole 211a, and pick-up lens 221 comprises welding pin 221a.By welding pin 221a is weldingly fixed on pad 211b, the back side that CCD camera assembly 220 is fixed on printed circuit board (PCB) 211 is printed circuit board (PCB) 211 surface of LED luminescence unit 212 dorsad, and this fixed form can not hinder coordinating of pick-up lens 221 and mounting hole 211a.
Being welded and fixed is the fixed form that a kind of reliability is higher, in other embodiments of the present utility model, CCD camera assembly 220 can adopt other modes to fix, for convenient fixing, preferably, on printed circuit board (PCB), the surface of LED luminescence unit comprises pad dorsad, and CCD camera assembly can be welded on this pad.
Hold and be intelligiblely, in other embodiments of the present utility model, the mode that CCD camera assembly 220 is fixed on the back side of printed circuit board (PCB) 211 can also be other modes, for example be adhesively fixed, screw is fixing etc., as long as ensure that the fixed position of CCD camera assembly 220 is positioned on printed circuit board (PCB) 211 surface of LED luminescence unit 212 dorsad, and this fixed position is positioned at the side of pick-up lens 221, can make like this fixed form can not hinder coordinating of pick-up lens 221 and mounting hole 211a.In addition, pick-up lens 222 is also fixing in the mode same with pick-up lens 221.
In the present embodiment, mate with the profile of pick-up lens 221 and pick-up lens 222 respectively in order to make mounting hole 211a and mounting hole 211b shape, the shape of mounting hole 211a and mounting hole 211b is all manhole, hold and be intelligiblely, in other embodiments of the present utility model, the shape of mounting hole 211a and mounting hole 211b can design as required.
In sum, in the present embodiment, LED display system has adopted the pick-up lens 221,222 of two to carry out image acquisition and improved image acquisition precision on the one hand, on the other hand, the fixed position of CCD camera assembly 220 is positioned on printed circuit board (PCB) 211 surface of LED luminescence unit 212 dorsad, and this fixed position lays respectively at the side of pick-up lens 221, pick-up lens 222, with respect to being positioned over LED display around, pick-up lens is more accurate to the collection of human body information like this.Therefore, this LED display system has improved the accuracy of camera collection information from two aspects, through experimental verification, can be applied in the LED display system that acquisition precision has relatively high expectations.
In addition, be easy to expect, in other embodiments of the present utility model, LED display system can arrange more pick-up lens to improve the precision of image acquisition, and now the printed circuit board (PCB) correspondence of LED display arranges the hole of equal number.
Embodiment bis-
Fig. 3,4 is the schematic diagram that the utility model LED display system is applied to an embodiment in 3D field, as shown in Figure 3,4, LED display system comprises CCD camera assembly, 3D rendering processing module, LED display, described CCD camera assembly comprises two horizontally or the pick-up lens that can be used for producing 3D rendering of homeotropic alignment setting, and the distance W between two pick-up lenss is 55-65 millimeter.
Existing 3D video camera is due to excessive, cannot be arranged in LED display viewing area at all, as shown in Figure 3, the present embodiment horizontally arranges two pick-up lenss on the printed circuit board (PCB) of LED display, distance W between two pick-up lenss is 55-65 millimeter, take people's left eye and right eye for the captured image of Same Scene for simulating, LED display system also comprises 3D rendering processing module, this 3D rendering processing module is for receiving the image information that CCD camera assembly is obtained, and produce 3D rendering according to this image information, and this 3D rendering is passed to LED display.Correspondingly, LED display is used for showing 3D rendering.This LED display system can be in 3D display device, and user can realize by LED display system the 3D video capture of What You See Is What You Get, can be for aspects such as video conference, interactive game, nautch teaching.
Particularly, 3D rendering processing module can be the elements such as microprocessor, this 3D rendering processing module can arrange separately, also can be integrated on the printed circuit board (PCB) of LED display, preferably, the common printed circuit board of 3D rendering processing module and LED display, 3D rendering processing module ratio is easier to be integrated in LED display like this, and structure is compact.Two pick-up lenss can be horizontally also can homeotropic alignment, apparent, the configuration of two pick-up lenss is consistent with various camera parameters, can unify configuration.Preferably, CCD camera assembly can comprise 3 above pick-up lenss, to improve the precision of image acquisition.
Embodiment tri-
Fig. 5 is the schematic diagram of another embodiment of LED display system of the present utility model, and as shown in Figure 5, LED display system comprises CCD camera assembly, 3D rendering processing module, LED display and communication module.The difference of the present embodiment and embodiment bis-is, described LED display system also comprises the communication module that can carry out video conference communication transmission, the 3D rendering that described communication module can produce 3D rendering processing module send other end of video conference to, and vision signal that can other end of receiver, video meeting sends to 3D rendering processing module.Increase after communication module, LED display system can, for video conference, also can, for networking storage shooting content, be networked and participate in interactive game.
Embodiment tetra-
Fig. 6 is the schematic diagram of another embodiment of LED display system of the present utility model, as shown in Figure 6, described LED display system also comprises the 3 D grating 230 that can realize bore hole 3D, the difference of the present embodiment and embodiment bis-is, described LED display system also comprises the 3 D grating 230 of the realized bore hole 3D that is arranged on LED luminescence unit dead ahead, on described 3 D grating, be provided with aperture 231 with described mounting hole corresponding position, pick-up lens can be taken through aperture.Certainly, on described 3 D grating, with described mounting hole corresponding position, transparent glasses lens or optical filter can also be set.And due to the existence of 3 D grating 230, when pick-up lens is installed, the front end face of pick-up lens can be higher than the light-emitting area of LED luminescence unit, between the light-emitting area and 3 D grating of LED luminescence unit, avoid the impact of LED light on photographic effect, to obtain better shooting effect.Further, described LED display shows that by polylith LED module is spliced conventionally, described 3 D grating shows that by polylith and LED the 3 D grating piece that module mate is spliced, and described 3 D grating piece is fixed on the printed circuit board (PCB) of LED demonstration module and is positioned at LED luminescence unit dead ahead.
Embodiment five
Fig. 7 is the schematic diagram that LED display system of the present utility model is applied to another embodiment in interactive game field, as shown in Figure 7, in LED display system, described CCD camera assembly comprises and is arranged on the camera that is applicable to interactive game by three on three perpendicular line near zones of the LED display quartern.Existing interactive game great majority are to be applicable to 1 people or 2 people's participations, in the time that being only set, a camera is difficult to obtain good effect, therefore will on three perpendicular line of the LED display quartern, three cameras be set, can make most interactive game obtain better effect.
Embodiment six
Fig. 8 is the schematic diagram of another embodiment of LED display system of the present utility model, and as shown in Figure 8, LED display system comprises CCD camera assembly, human body induction module, signal processing module, LED display.
The difference of the LED display system shown in LED display system and Fig. 2 a in the present embodiment is: in the present embodiment, LED display system also comprises human body induction module and signal processing module.
Human body induction module is used for obtaining human action information, such as gesture etc.Human body induction module can comprise sonac and/or infrared sensor.The measurement mechanism that infrared sensor is is medium with infrared ray, can detect the direction of motion of human body, can also detect the spectrum information of human body, due to everyone spectrum information difference, can improve the accuracy of detection information.
Ultrasonic sensor is the sensor that utilizes hyperacoustic characteristic to develop.Ultrasound wave refers to the mechanical wave of frequency higher than 20kHz, and generation of vibration is occurred under the excitation of voltage by transducing wafer, and it has, and frequency is high, wavelength is short, diffraction phenomenon is little, particularly good directionality, can become ray and the features such as direction propagation.Ultrasound wave is very large to the penetrating power of liquid, solid, especially in the opaque solid of sunlight, and its degree of depth of penetrable tens meters.Therefore ultrasound examination is widely used in the aspects such as industry, national defence, biomedicine.
The human action information that message processing module transmits for receiving human body sensing device, and carry out analyzing and processing, show accordingly information and this demonstration information is passed to LED display selecting, or according to human action information, LED display system is carried out the operations such as menu setting, as startup/Exit Game, start video conference etc.Here, message processing module can be processed the information that CCD camera assembly is transmitted simultaneously, can make like this structure of LED display system simpler, but in other embodiments of the present utility model, the information of CCD camera assembly can be utilized other mode processing, need not share a message processing module with human body induction module.
Preferably, in order to improve the structural integrity of LED display system, human body induction module and LED display can common printed circuit boards, can also simplify the structure of LED display system simultaneously.
In fact, except gathering action message, LED display system can also gather other information and show, for example, in other embodiments of the present utility model, human body induction module can replace gathering acoustic information with the equipment such as microphone, acoustic pickup, selects display frame according to acoustic information.
Embodiment seven
As shown in Figure 9; LED display shows that by polylith same size LED module 213 is spliced conventionally; when showing while pick-up lens being set on module 213 at LED; just need on printed circuit board (PCB), punch and corresponding installing mechanism is set; and the position difference of the pick-up lens that different application need to be installed; the installation accuracy difference requiring, is difficult to large-scale production, and cost is higher.
For these reasons, as shown in Figure 10,11, the present embodiment provides a kind of and has shown that with LED the LED shooting that module 213 sizes are identical shows module 215, shows on module 215 and is provided with multiple mounting holes that can be used for adjusting camera installation site in LED shooting.LED shooting demonstration module 215 is convenient to large-scale production, and can be used for pick-up lens position accuracy demand is not too high application, assembled LED display together with LED demonstration module 213.When use, the first requirement to pick-up lens installation site according to different application, determines that LED shooting shows the stitching position of module 215 in LED display, and then definite pick-up lens selects LED shooting to show which mounting hole on module 215 can.
As shown in Figure 12,13, the present embodiment provides another scheme, described LED display shows that by polylith LED module is spliced, and described LED shows that module has two kinds of sizes, and the LED that described CCD camera assembly is arranged on reduced size shows on module 214.Being used for is not too high application to pick-up lens position accuracy demand, assembled LED display together with LED demonstration module 213.
Preferred LED shows that module 214 prolongs horizontal direction or vertical direction has one side and LED to show that module 213 equates.In embodiment as shown in 12, LED shows that module 214 shows that with LED module 213 equates in vertical direction, and limit is in the horizontal direction less than LED and shows module 213, is applicable to the pick-up lens adjusting of installation site in the horizontal direction.Obviously LED shows that module 214 also can show that with LED module 213 is identical in limit in the horizontal direction, is applicable to the pick-up lens adjusting of installation site in vertical direction.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. a LED display system with multiple cameras, is characterized in that, this LED display system comprises:
CCD camera assembly, this CCD camera assembly comprises more than two pick-up lens;
LED display, this LED display comprises LED luminescence unit and printed circuit board (PCB), described printed circuit board (PCB) also comprises the mounting hole identical with described pick-up lens quantity,
And each described pick-up lens is housed inside in a described mounting hole, and the front end face of this pick-up lens is towards the emission side of described LED display.
2. LED display system according to claim 1, is characterized in that: described CCD camera assembly comprises two horizontally or the pick-up lens that can be used for producing 3D rendering of homeotropic alignment setting, and the distance W between two pick-up lenss is 55-65 millimeter.
3. LED display system according to claim 2, it is characterized in that: described LED display system also comprises 3D rendering processing module, this 3D rendering processing module receives the image information that described CCD camera assembly is obtained, and produce 3D rendering according to this image information, and this 3D rendering can be passed to described LED display.
4. LED display system according to claim 3, it is characterized in that: described LED display system also comprises the 3 D grating of the realized bore hole 3D that is arranged on LED luminescence unit dead ahead, on described 3 D grating, be provided with aperture or transparent glasses lens or optical filter with described mounting hole corresponding position.
5. LED display system according to claim 1, is characterized in that: the front end face of described pick-up lens is provided with between the surface of LED luminescence unit and the light-emitting area of described LED luminescence unit at described printed circuit board (PCB).
6. LED display system according to claim 4, is characterized in that: the front end face of described pick-up lens is between the light-emitting area and 3 D grating of LED luminescence unit.
7. LED display system according to claim 4, it is characterized in that: described LED display shows that by polylith LED module is spliced, described 3 D grating shows that by polylith and LED the 3 D grating piece that module mate is spliced, and described 3 D grating piece is fixed on the printed circuit board (PCB) of LED demonstration module and is positioned at LED luminescence unit dead ahead.
8. LED display system according to claim 3, it is characterized in that: described LED display system also comprises the communication module that can carry out video conference communication transmission, the 3D rendering that described communication module can produce 3D rendering processing module send other end of video conference to, and vision signal that can other end of receiver, video meeting sends to 3D rendering processing module.
9. LED display system according to claim 1, is characterized in that: described CCD camera assembly comprises and is arranged on the camera that is applicable to interactive game by three on three perpendicular line of the LED display quartern.
10. according to the arbitrary described LED display system of claim 1-9, it is characterized in that: described LED display shows that by polylith LED module is spliced, part LED shows that module is provided with multiple mounting holes that can be used for adjusting camera installation site.
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| US10701313B2 (en) | 2018-03-28 | 2020-06-30 | Beijing Funate Innovation Technology Co., Ltd. | Video communication device and method for video communication |
| US10819948B2 (en) | 2018-03-28 | 2020-10-27 | Beijing Funate Innovation Technology Co., Ltd. | Window system based on video communication |
| TWI710247B (en) * | 2018-03-28 | 2020-11-11 | 大陸商北京富納特創新科技有限公司 | Video communication device and method for connecting video communication to other device |
| WO2021108913A1 (en) * | 2019-12-04 | 2021-06-10 | Studio Thinkwell Montréal Inc. | Video system, method for calibrating the video system and method for capturing an image using the video system |
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2014
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| US10623698B2 (en) | 2018-03-28 | 2020-04-14 | Beijing Funate Innovation Technology Co., Ltd. | Video communication device and method for video communication |
| US10645340B2 (en) | 2018-03-28 | 2020-05-05 | Beijing Funate Innovation Technology Co., Ltd. | Video communication device and method for video communication |
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