CN209691133U - A kind of camera shooting experience system - Google Patents
A kind of camera shooting experience system Download PDFInfo
- Publication number
- CN209691133U CN209691133U CN201822172442.0U CN201822172442U CN209691133U CN 209691133 U CN209691133 U CN 209691133U CN 201822172442 U CN201822172442 U CN 201822172442U CN 209691133 U CN209691133 U CN 209691133U
- Authority
- CN
- China
- Prior art keywords
- camera
- array
- video
- video camera
- shooting
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Landscapes
- Closed-Circuit Television Systems (AREA)
Abstract
The utility model discloses a kind of camera shooting experience systems, it is related to practice-training teaching field, the system can influence with visual simulation different cameras parameter to shooting picture using the video camera of shooting effects different in video camera array, influence of the different shooting angles to shooting picture can be simulated using the camera crane that video camera array can be driven to go up and down, influence of the different illuminating effects to shooting picture can be simulated using adjustable lamplight array；It can be intuitively displayed the difference of shooting effect brought by factor difference using array of display, the variation of the customized every factor of teacher can be made targetedly to be imparted knowledge to students using the manipulation of console, this system allows teacher to carry out practice-training teaching to camera shooting learned lesson, optimize the teaching pattern of camera shooting study, practice operability, specific aim and the intuitive in teaching process are improved, helps to optimize teaching efficiency.
Description
Technical field
The utility model relates to practice-training teaching field, especially a kind of camera shooting experience system.
Background technique
Imaging learned lesson is a complicated course, this is because photographic effect will receive the influence of several factors, than
Parameter setting, the ambient light of such as video camera shine strong and weak and ambient angle, therefore student is in camera shooting learned lesson
It just needs to know influence of these factors to shooting effect in the process, it in varied situations can shooting effect to could grasp
The ability of preferable picture.But current camera shooting study is the teaching material using forms such as text, pattern and videos mostly
Based on, the practicality of student is poor, and these teaching materials are the teaching effects that targetedly, teaching intuitive is not also poor
Fruit is not ideal enough.
Utility model content
The present inventor regarding to the issue above and technical need, proposes a kind of camera shooting experience system, which makes teacher
Practice-training teaching can be carried out to camera shooting learned lesson, can targetedly the influence to different factors to shooting effect carried out intuitively
It shows, optimizes teaching method.
The technical solution of the utility model is as follows:
A kind of camera shooting experience system, the camera shooting experience system include classroom main body and the control that is arranged in the main body of classroom
Platform, video camera array, camera crane, driving device, video matrix, network hard disk video recorder NVR and array of display, classroom master
There is one piece of outdoor scene place comprising presumptive area in body, accommodate static and/or mobile entity elements in outdoor scene place；
Camera crane is arranged in around outdoor scene place, and camera crane includes longitudinal stand and horizontal frame, longitudinal direction
The sliding rail of vertical direction is provided in stand, horizontal frame is crossed in longitudinal stand and is placed in sliding rail, driving device connection
And horizontal frame is driven to go up and down in the vertical direction along sliding rail；
Video camera array includes at least two video cameras, and the shooting effect of at least two video cameras is different, each to take the photograph
Camera is arranged in parallel and is fixed on horizontal frame, and each video camera towards outdoor scene place and acquires the video counts in outdoor scene place
According to；
Each video camera in video camera array is separately connected video matrix, and video matrix connects NVR, NVR connection display
Array, array of display is for showing the collected video data of each video camera；
The control panel of video matrix and NVR integrate in the console respectively, and console is also connected with and controls driving device.
Its further technical solution is, the field angle of each video camera in video camera array, resolution ratio, support number
It is different according at least one parameter in standard, aperture size, focal length effect, sensitivity, photosensitive type and imaging color.
Its further technical solution is, including being set up directly on the video camera of horizontal frame and leading in video camera array
Cross the video camera that horizontal frame is arranged in holder.
Its further technical solution is that camera shooting experience system further includes lamplight array, and lamplight array is arranged in outdoor scene field
Around ground, lamplight array includes several lighting sources, and each lighting source is respectively facing outdoor scene place, and console connects respectively
The simultaneously each lighting source of independent control is connect, so that lamplight array provides corresponding illuminating effect for outdoor scene place.
Its further technical solution is that the side wall for offering window of classroom main body is linked with openable and closable shading window
Curtain, normal lighting lamp is also equipped in the main body of classroom, and side wall, bottom surface and the top surface of classroom main body are brushed as black, console
It is in appearance of black with camera crane；When not carrying out camera shooting practice-training teaching in the main body of classroom, window shade is opened and/or day
Normal headlamp is opened；When carrying out camera shooting practice-training teaching in the main body of classroom, window shade closure and the closing of normal lighting lamp.
Its further technical solution is that camera shooting experience system further includes projector, and projector is hung on classroom main body
Top and towards the side wall of classroom main body carry out image projection, projector connect console.
Its further technical solution is, camera crane includes two longitudinal stands disposed in parallel and is crossed on two
Horizontal frame in longitudinal stand is respectively arranged with the sliding rail of vertical direction, the both ends point of horizontal frame in two longitudinal stands
It is not placed in the sliding rail of two longitudinal stands；Driving device includes two driving motors, and each driving motor is separately connected and drives
One end of dynamic horizontal frame is gone up and down in corresponding sliding rail.
The advantageous effects of the utility model are:
This application discloses a kind of camera shooting experience system, which allows teacher to carry out real training to camera shooting learned lesson
Teaching, can be with visual simulation different cameras parameter to shooting picture using the video camera of shooting effects different in video camera array
Influence, using can drive video camera array go up and down camera crane can simulate different shooting angles to the shadow of shooting picture
It rings, influence of the different illuminating effects to shooting picture can be simulated using adjustable lamplight array；It can be with using array of display
The difference of shooting effect brought by intuitive display factor difference, can make the customized items of teacher using the manipulation of console
Targetedly to be imparted knowledge to students, this system optimizes the teaching pattern of camera shooting study for the variation of factor, improves teaching process
In practice operability, specific aim and intuitive, help to optimize teaching efficiency.
Detailed description of the invention
Fig. 1 is the system construction drawing of camera shooting experience system disclosed in the present application.
Fig. 2 is the circuit connection diagram of camera shooting experience system disclosed in the present application.
Specific embodiment
Specific embodiments of the utility model will be further explained with reference to the accompanying drawing.
This application discloses a kind of camera shooting experience system, the structure chart of the system shown in FIG. 1 and shown in Fig. 2 is please referred to
The automatically controlled figure of the system, the system include classroom main body and the console being arranged in the main body of classroom, video camera array 1, phase
Machine crane 2, driving device, video matrix, NVR (Network Video Recorder, network hard disk video recorder) and display
Array.There is one piece of outdoor scene place, which is one piece of arbitrary area size comprising presumptive area in the main body of classroom
Region, static and/or mobile entity elements are accommodated in outdoor scene place, and entity elements can be the entities such as people, object, entity
It can be still life form, be also possible to motion morphology, for example personage runs on foot, around field and the forms such as cycling, for another example model
The forms such as trolley operating.
Video camera array 1 includes at least two video cameras 11, and the shooting effect of this at least two video camera 11 is different,
Specifically, the field angle of at least two video cameras 11 in video camera array 1, shooting pixel, the data standard of support, aperture are big
At least one parameter in small, focal length effect, sensitivity, photosensitive type and imaging color is different.Wherein, the visual field of video camera
Angle includes the classifications such as focal length, wide-angle and flake；The resolution ratio of video camera such as can be 360P, 720P, 1080P value；It takes the photograph
The data standard that camera is supported mainly includes digital system and analog system；The aperture size of video camera such as can be f/1.4,
The values such as f/2.8, f/4, f/11, f/16, f/22；The focal length effect of video camera includes fixed-focus and zoom；The sensitivity of video camera
For example it can be the values such as ISO100, ISO200, ISO400, ISO800；The photosensitive type of video camera mainly include visible light and
The classifications such as infrared ray；The imaging color of video camera includes the classifications such as colored and black and white.Shoot pixel, the data standard of support, sense
Luminosity, photosensitive type and imaging color determined by the characteristic of video camera itself, field angle, aperture size and focal length effect by
The characteristic for the camera lens that video camera is equipped with determines.
The quantity for the video camera 11 for including in video camera array 1 and the parameter configuration of each video camera 11 are according to practical need
Want customized.When practical application, comparison learns influence of each element to shooting effect for convenience, can be according to camera shooting real training
The course of teaching needs, and different combinations is carried out according to the following terms element: (1), field angle element: focal length, wide-angle, flake；
(2), resolution ratio element: high definition, SD；(3), data standard element: number, simulation；(4), aperture element: aperture size is not
Together；(5), sensitivity element: sensitivity is of different sizes；(6), focal length element: fixed-focus and zoom；(7), color essential: colored, black
It is white；(8), low-light (level) element: infrared.
At least two video cameras 11 in video camera array 1 are other than camera parameters configuration is different, with horizontal frame
Connection type there may also be difference, a part of video camera is set up directly on horizontal frame, is another in video camera array 1
Part video camera is arranged on horizontal frame by holder, and these two types can distinguish analog video camera answering in different scenes
With.When in the occasion that video camera is applied to such as square etc, video camera is needed to carry out comprehensive monitoring, it is therefore desirable to take the photograph
Camera rotating monitoring, application in this scene can be simulated by being mounted on the video camera on horizontal frame by holder.It is imaging
It when machine is applied in the occasions such as corridor, doorway, only needs video camera to carry out fixed point monitoring, does not need to rotate, therefore directly pacify
Video camera on horizontal frame can simulate the application in this scene.
Video camera array 1 is arranged on camera crane 2, specifically, the camera crane 2 in the application includes longitudinal vertical
Frame and horizontal frame are provided with the sliding rail of vertical direction in longitudinal stand, and horizontal frame is connected across in longitudinal stand, horizontal frame
It is placed in sliding rail.Each video camera 11 is arranged in parallel and is fixed on horizontal frame, each video camera towards outdoor scene place simultaneously
Acquire the video data in outdoor scene place.Driving device connects and horizontal frame is driven to go up and down in the vertical direction along sliding rail, drives
Dynamic device can use the screw rod driving device of motor driven screw rod.Due to needing to carry more on the horizontal frame in the application
Video camera, quantity possibly even have more than 20, therefore the camera crane 2 in the application includes two longitudinal directions disposed in parallel
Stand and the horizontal frame being crossed in two longitudinal stands are respectively arranged with the sliding rail of vertical direction in two longitudinal stands,
The both ends of horizontal frame are respectively placed in the sliding rail of two longitudinal stands, then the practical driving device in the application includes two drives
Dynamic motor, each driving motor are separately connected and one end of horizontal frame are driven to go up and down in corresponding sliding rail.Using bi-motor
The structure of driving can make the both ends of horizontal frame drive active lifting by driving motor, to guarantee driving force and driving
Stability.
Each video camera 11 in video camera array 1 is separately connected video matrix, and the video matrix expression of a M × N can
To support the input of the road M image and the output of the road N image simultaneously, video matrix is exactly every in video camera array per the input of image all the way
A collected video data of video camera, video matrix are existing commercial equipment, can be chosen according to required data number
Suitable model, the application are not defined product type.Video matrix connects NVR, NVR connection array of display, video square
Battle array will be transferred to NVR after video camera each in video camera array collected video data processing distribution, NVR to video data into
Row stores and video data is sent to array of display and shows, the array of display in the application is shown including at least one
Screen, the application use LCD display.Video matrix and NVR are controlled by respective control panel, this is video matrix and NVR
Intrinsic working attributes, the application are not developed in details.The control panel of video matrix and NVR integrate console in this application respectively
In, console, which passes through the control panel being internally integrated, may be implemented following function: 1, adjusting field angle, focal length and the aperture of video camera
Etc. parameters；2, it realizes and the video image record and picture of any video camera is captured；3, the holder connected to video camera is realized
Rotation control；4, control array of display display mode, such as control on one display using divided frame show it is more
A collected video data of video camera；One collected view of video camera of full screen display on one display is controlled for another example
Frequency evidence switches the display collected video data of different cameras by key；Array of display includes multiple displays for another example
Screen, control show that the collected video data of each video camera, each display screen are all made of full frame respectively on each display screen
Mode of display, etc..
Optionally, which further includes lamplight array 3, and lamplight array is arranged in around outdoor scene place, lamp
It include several lighting sources 30 in optical arrays 3, each lighting source 30 is respectively facing outdoor scene place.Specifically, in the application
Lamplight array 3 may include the direction that video camera array 1 is set relative to the same side in outdoor scene place and with video camera 11
Preceding light lamp array column 31 in the same direction are arranged in video camera array 1 relative to the other side in outdoor scene place and set with 11 opposite direction of video camera
The backlight array 32 set, and the side light lamp array 33 of outdoor scene place two sides is set.
Console additionally provides control panel and carries out for teacher other than being integrated with the control panel of video matrix and NVR
Manual control can control driving device just by operating control panel specifically, console connects and control driving device
Turn, reversion, so that horizontal frame be driven to go up and down.Console is also respectively connected with and each lighting source 30 of independent control, so that logical
It crosses operation control panel and can control part of lighting source 30 and light, when the number of lights of lighting source 30 in lamplight array 3
When the position difference for the lighting source 30 that amount is different, lights, lamplight array 3 provides different brightness and different irradiations for outdoor scene place
The light of angle, to provide different illuminating effects for outdoor scene place.
Optionally, which further includes projector, and projector is hung on the top of classroom main body and towards religion
The side wall of room main body carries out image projection, and projector is electrically connected console, is imaged using disclosed system
When practice-training teaching, it can synchronize and project to teaching courseware on the side wall of classroom main body.
Fig. 1 shows the normal arrangement top view of disclosed system, and the front of classroom main body is arranged in console
Region, is usually also implemented as the dais of teacher, teacher can exist while imparting knowledge to students at console to various components into
Row manual control.Outdoor scene place is located at the Background Region of classroom main body, and lamplight array 3 is arranged in around outdoor scene place, camera shooting
Machine array 1 and camera crane 2 are arranged between console and outdoor scene place and video camera face outdoor scene place, projector suspension
On the furred ceiling of classroom main body and on projection to classroom main body rear metope namely on the wall on 1 opposite of video camera array, in Fig. 1
Projector is not shown.
Window is usually offered on the side wall of the classroom main body, guarantees the normal daylighting of entire classroom main body, opens up fenestrate
The side wall at family is linked with openable and closable window shade, and normal lighting lamp is also equipped in the main body of classroom, meanwhile, classroom main body
It is black that side wall, bottom surface and top surface, which are brushed, and console and camera crane are also in appearance of black, this structure can make
The classroom main body function of commonly giving lessons and image practice-training teaching compatible simultaneously, when not needing to carry out camera shooting real training in the main body of classroom
Teaching when only needing commonly to give lessons, can be opened and/or be opened normal lighting lamp with window shade, provide commonly give lessons it is required
Illumination；When needing to carry out camera shooting practice-training teaching in the main body of classroom, window shade and normal lighting lamp are closed, opens light battle array
Column 3 provide illumination, and the effect in a similar film studio can be built in the main body of classroom, carries out illumination simulation by lamplight array 3,
The influence of ambient is avoided, provides a good lighting simulation environment for camera shooting practice-training teaching, and black in the main body of classroom
Component can reduce parts surface generation light interference, thus preferably carry out camera shooting illumination simulation.
Teacher is as follows using the application that camera shooting experience system disclosed in the present application carries out camera shooting real training:
1, the picture that can be shot to the video camera using different shooting effects carries out across comparison.Specifically, teacher's root
It is needed according to the course of camera shooting practice-training teaching, according to different factor combination video cameras, corresponding illuminating effect is set by console
With the position of horizontal frame, then controls the video camera of each different shooting effects while acquiring the video data in outdoor scene place,
Then the collected video data of each video camera is shown simultaneously on array of display, can intuitively be presented at this time same
In the case where outdoor scene place, equal illumination effect and identical shooting angle, photographic effect brought by different cameras parameter
Difference.
For example, the factor combination situation of 4 video cameras in an example can be such that
| Label | Field angle element | Color essential | Aperture element |
| 1 | Focal length | It is colored | f/1.4 |
| 2 | Wide-angle | It is colored | f/1.4 |
| 3 | Focal length | Black and white | f/1.4 |
| 4 | Focal length | Black and white | f/22 |
The image comparison that can be then shot by label 1 and 2 learns influence of the field angle element to shooting effect, pass through by
Influence of the image comparison color learning element that label 1 and 3 is shot to shooting effect, passes through the image pair for shooting label 3 and 4
Influence than study aperture element to shooting effect.
2, across comparison can be carried out to the shooting picture under different illuminating effects.Specifically, teacher is set by console
Fixed corresponding illuminating effect and horizontal frame position, the video data in control video camera acquisition outdoor scene place, then pass through control
The light on and off that platform changes lighting source make lamplight array provide different illuminating effects, acquire outdoor scene again using same video camera
Then the video data in place shows same video camera collected video data twice on array of display, at this time can be straight
That sees shows same camera in the case where the same outdoor scene place and identical shooting angle, takes the photograph brought by illuminating effect difference
As the difference of effect.
3, across comparison can be carried out to the picture shot under different shooting angle.Specifically, teacher passes through console
Corresponding illuminating effect and horizontal frame position are set, then the video data in control video camera acquisition outdoor scene place passes through control
Platform control driving device driving horizontal frame lifting processed, so that video camera array is in different shooting heights, is taken the photograph using same
Camera acquires the video data in outdoor scene place again, and same video camera collected video twice is then shown on array of display
Data can intuitively show same camera in the case where the same outdoor scene place and equal illumination effect at this time, and shooting is high
Spend the difference of photographic effect brought by the difference of (namely shooting angle).
Above-described is only the preferred embodiment of the application, and the utility model is not limited to above embodiments.It can manage
Solution, those skilled in the art do not depart from the utility model spirit and design under the premise of directly export or associate other
Improvements and changes are considered as being included within the scope of protection of this utility model.
Claims (7)
1. a kind of camera shooting experience system, which is characterized in that the camera shooting experience system includes classroom main body and is arranged described
Console, video camera array, camera crane, driving device, video matrix, network hard disk video recorder NVR in the main body of classroom
And array of display, include the outdoor scene place of presumptive area with one piece in the classroom main body, is accommodated in the outdoor scene place
Static and/or mobile entity elements；
The camera crane is arranged in around the outdoor scene place, and the camera crane includes longitudinal stand and laterally arranges
Frame is provided with the sliding rail of vertical direction in the longitudinal direction stand, and the horizontal frame is crossed in longitudinal stand and is placed in
In the sliding rail, the driving device connects and the horizontal frame is driven to go up and down in the vertical direction along the sliding rail；
The video camera array includes at least two video cameras, and the shooting effect of at least two video camera is different, respectively
A video camera is arranged in parallel and is fixed on the horizontal frame, each video camera towards the outdoor scene place simultaneously
Acquire the video data in the outdoor scene place；
Each video camera in the video camera array is separately connected the video matrix, described in the video matrix connection
NVR, the NVR connection array of display, the array of display is for showing each collected video counts of the video camera
According to；
The control panel of the video matrix and the NVR are integrated in respectively in the console, and the console is also connected with and controls
Make the driving device.
2. camera shooting experience system according to claim 1, which is characterized in that each in the video camera array described takes the photograph
Field angle, resolution ratio, the data standard of support, aperture size, focal length effect, sensitivity, photosensitive type and the imaging of camera
At least one parameter in color is different.
3. camera shooting experience system according to claim 1, which is characterized in that include directly being arranged in the video camera array
The video camera of the horizontal frame is set in the video camera of the horizontal frame and by holder.
4. camera shooting experience system according to claim 1 to 3, which is characterized in that the camera shooting experience system further includes
Lamplight array, the lamplight array are arranged in around the outdoor scene place, and the lamplight array includes several lighting sources,
Each lighting source is respectively facing the outdoor scene place, and the console is separately connected and each illumination of independent control
Light source, so that the lamplight array provides corresponding illuminating effect for the outdoor scene place.
5. camera shooting experience system according to claim 4, which is characterized in that the side for offering window of the classroom main body
Wall is linked with openable and closable window shade, and normal lighting lamp, the side of the classroom main body are also equipped in the classroom main body
It is black that wall, bottom surface and top surface, which are brushed, and the console and the camera crane are in appearance of black；In the classroom master
When not carrying out camera shooting practice-training teaching in body, the window shade is opened and/or the normal lighting lamp is opened；In the classroom master
When carrying out camera shooting practice-training teaching in body, the window shade closure and normal lighting lamp closing.
6. camera shooting experience system according to claim 1 to 3, which is characterized in that the camera shooting experience system further includes
Projector, the projector are hung on the top of the classroom main body and carry out picture throwing towards the side wall of the classroom main body
Shadow, the projector connect the console.
7. camera shooting experience system according to claim 1 to 3, which is characterized in that the camera crane includes two
Longitudinal direction stand disposed in parallel and the horizontal frame being crossed in two longitudinal stands are distinguished in two longitudinal stands
It is provided with the sliding rail of vertical direction, the both ends of the horizontal frame are respectively placed in the sliding rail of two longitudinal stands；It is described
Driving device includes two driving motors, and each driving motor is separately connected and drives one end of the horizontal frame in phase
It is gone up and down in the sliding rail answered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822172442.0U CN209691133U (en) | 2018-12-21 | 2018-12-21 | A kind of camera shooting experience system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822172442.0U CN209691133U (en) | 2018-12-21 | 2018-12-21 | A kind of camera shooting experience system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209691133U true CN209691133U (en) | 2019-11-26 |
Family
ID=68596621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822172442.0U Active CN209691133U (en) | 2018-12-21 | 2018-12-21 | A kind of camera shooting experience system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209691133U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109410684A (en) * | 2018-12-21 | 2019-03-01 | 无锡职业技术学院 | A kind of camera shooting experience system |
-
2018
- 2018-12-21 CN CN201822172442.0U patent/CN209691133U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109410684A (en) * | 2018-12-21 | 2019-03-01 | 无锡职业技术学院 | A kind of camera shooting experience system |
| CN109410684B (en) * | 2018-12-21 | 2024-04-16 | 无锡职业技术学院 | Real standard system of making a video recording |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Froehlich et al. | Creating cinematic wide gamut HDR-video for the evaluation of tone mapping operators and HDR-displays | |
| US6481851B1 (en) | Adjustable contrast reflected display system | |
| CN1167967C (en) | Lighting device for microscope | |
| TWI252350B (en) | LCD device | |
| CN112104794A (en) | Virtual micro-classroom studio system and device | |
| CN110099261B (en) | LED (light-emitting diode) dot matrix backlight source of projection equipment, projection device and projection method | |
| CN105611237A (en) | Method for simulating five cameras by utilizing double cameras for education recording and broadcasting | |
| DE202005008776U1 (en) | Flat television (TV) image-screen, has additional small background illumination image screen | |
| CN108391077A (en) | A kind of simple Classic Course video automatic shooting record device | |
| CN209691133U (en) | A kind of camera shooting experience system | |
| CN111954024A (en) | Course recording live broadcasting method and system | |
| CN109410684A (en) | A kind of camera shooting experience system | |
| CN115052114B (en) | Electronic semitransparent green curtain image matting and lesson recording system | |
| US8576336B2 (en) | Progressive video reformatting for film-based content | |
| CN102881197A (en) | Dual-purpose multi-media projection demonstration system used for dome screen and dome | |
| CN207199111U (en) | A kind of remote-controlled historical teaching projecting apparatus | |
| CN209804031U (en) | Security monitoring application test system | |
| WO1995014252A1 (en) | 3-d video microscope | |
| Bermingham | Location lighting for television | |
| CN111093301B (en) | Light control method and system | |
| CN206058563U (en) | Interactive liquid crystal electronic whiteboard embeds video show stand | |
| CN215730275U (en) | Education technique is with propaganda exhibition device | |
| RU110210U1 (en) | STREET VIDEO ROLLER DISPLAY DEVICE | |
| US20120327313A1 (en) | Wallpaper Projection System | |
| CN201909934U (en) | Projection video camera |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |