CN107506055A - Slide demonstration control device - Google Patents
Slide demonstration control device Download PDFInfo
- Publication number
- CN107506055A CN107506055A CN201710741747.6A CN201710741747A CN107506055A CN 107506055 A CN107506055 A CN 107506055A CN 201710741747 A CN201710741747 A CN 201710741747A CN 107506055 A CN107506055 A CN 107506055A
- Authority
- CN
- China
- Prior art keywords
- camera
- button
- control module
- laser
- stepper motor
- 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.)
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03542—Light pens for emitting or receiving light
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/10—Program control for peripheral devices
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
- G06F3/0383—Signal control means within the pointing device
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Projection Apparatus (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The present invention relates to lantern slide control technology field, in particular to a kind of slide demonstration control device, including camera, laser pen, adjustment support, control module, infrared projection device, input module, memory module and demonstration glasses.Camera is adjustable focal length camera, laser pen can send the laser flashed with different frequency, laser pen is provided with function button, different function buttons corresponds to different flicker frequencies, function button includes angle correction button and ratio correction button, also include adjustment support, adjustment support, which is provided with, to be used for adjusting the first stepper motor of the camera angle of pitch and for adjusting the second stepper motor of camera yaw angle.Slide demonstration control device provided by the invention, the problem of laser spots detection is inaccurate caused by camera installation site deviation is can solve the problem that, while user can be helped to be smoothed out demonstrating.
Description
Technical field
The present invention relates to lantern slide control technology field, in particular to a kind of slide demonstration control device.
Background technology
In demonstration or meeting, opened up usually using slide demonstration software and by projecting apparatus or large-screen display equipment
Show the material content of correlation.And laser pen is used for the instruction on projecting apparatus or giant-screen in demonstration or meeting and tells about content.
But this laser pen can not interact with slide demonstration software.So we usually see wants extra using the people of laser pen
Drawing explanation is carried out using blank, either to indicate how the people of operating computer operates or oneself go to operate computer,
Obviously this makes troubles to instructor, also to say that solution preocess is not smooth enough.
Existing solution method is mostly by the tracing and positioning of the laser spots to laser pen, and it is hard to be equipped with corresponding communication
Part, such as bluetooth, WiFi are by the operation of user（Page turning, motor, setting-out etc.）It is transferred on computer, so as to realize laser pen and electricity
The interaction of brain, simplify the control flow of slide demonstration.To laser point tracking typically by camera and corresponding image
What the modules such as correction, coordinate mapping and Coordinate Conversion were completed, generally comprise following steps：1. use camera capture images；
2. a pair image is corrected；3. detect laser spot position in capture images；4. by laser spot position coordinate by capture images
Coordinate system is converted to computer screen coordinate system；5. utilize coordinate information drawing or control computer mouse pointer.
But user, when installing camera manually, there is larger difference in its putting position and angle, will make to take the photograph sometimes
The image gathered as head produces larger distortion, and image flame detection algorithm can not tackle all situations, therefore in the use of reality
In, it will usually the problem of laser point location is not accurate enough be present.
The content of the invention
The invention is intended to provide a kind of slide demonstration control device, it can solve the problem that camera installation site deviation and cause
Laser spots detection it is inaccurate the problem of.
In order to solve the above-mentioned technical problem, this patent provides following basic technology scheme：
Slide demonstration control device, including camera and laser pen, the camera are adjustable focal length camera, laser pen energy
The laser flashed with different frequency is enough sent, the laser pen is provided with function button, and different function buttons corresponds to different
Flicker frequency, the function button include angle correction button and ratio correction button, in addition to：
Support is adjusted, the adjustment support is used for installing camera, and the adjustment support, which is provided with, to be used for adjusting camera pitching
First stepper motor at angle and for adjusting the second stepper motor of camera yaw angle；
Control module, the control module are connected with camera, the first stepper motor and the equal signal of the second stepper motor, the control
Molding block is also connected with pcs signal, and the control module is used to be tracked laser spots positioning and according to the position of laser spots
With the projection of the operational control computer-made lantern slide of user, the control module can by camera obtain projecting apparatus image with
And the laser spots of laser pen, the control module can detect the flicker frequency of laser spots, the control module can detect
First step stepper motor and the second stepper motor point are controlled when to laser dot flicker rate being the frequency corresponding to angle correction button
Not Tiao Zheng camera the angle of pitch and yaw angle to laser spots be located at camera collection image center, the control module energy
Enough focal lengths that camera is adjusted when detecting laser dot flicker rate as ratio and correcting the frequency corresponding to button are to projecting apparatus
Image it is maximum in camera acquisition range.
The present invention working principle and beneficial effect be：
Camera is arranged on adjustment support first, laser pen is then opened, laser spots is placed into projector pattern
Center, press angle correction button, laser spots collect sharp according to default frequency scintillation, control module by camera
The position of luminous point and the flicker frequency of laser spots, judged angle correction function is being currently used according to laser dot flicker rate,
Control module controls the first stepper motor to rotate, and then adjusts the angle of pitch of camera, when detecting that laser spots are located at camera
During the center of the vertical direction of coverage, stop the first stepper motor, then control the second stepper motor to rotate, regulation shooting
Head yaw angle, until laser spots are located at the center in the horizontal direction of camera coverage, then press ratio correction
Button, laser spots are controlled with other frequency scintillation, control module and adjust camera focal length, and then constantly regulate camera is clapped
The scope taken the photograph, until the up-and-down boundary or a left side of the up-and-down boundary or right boundary of projector pattern with camera coverage
Right margin overlaps, and complete and maximum projector pattern is now included in camera coverage, then can is opened
Beginning slide demonstration, control module can obtain position and the flicker frequency of laser spots in real time, then pass through coordinate transform etc.
Be converted to the control to computer-made lantern slide presentation process.
In technical scheme, button is corrected by adjusting support, angular adjustment button and ratio, adjustment can be made
Support adjusts to the shooting angle of camera automatically, and the pattern of projection is filled substantially with the coverage of camera, from
And after making the complete device of different user installations, angle and the essentially identical image of scope can be obtained, using the flicker frequency of laser spots
Rate carrys out transmission information, can be directly using camera without increasing extra communication module, simpler convenience, with prior art
Compare, technical solution of the present invention, which can reduce, makes the distortion of image essentially identical while pattern distortion, improve the unification of image
Property, so as to facilitate control module to handle these images using default correction algorithm, it is ensured that the effect of correction, and then improve laser
The accuracy of point position, makes laser point location more accurate.
Further, the function button also includes left button button, line button, page up button and lower one page button,
The control module controls computer cursor corresponding when can click frequency corresponding to button detecting hot spot flicker frequency
Position performs the function that left button is pressed, and the control module can detect hot spot flicker frequency for corresponding to line button
Computer-made lantern slide is controlled to enter paintbrush function during frequency, the control module can detect that hot spot flicker frequency is page up
Computer-made lantern slide is controlled to play page up during frequency corresponding to button, the control module can detect hot spot flicker frequency
To control computer-made lantern slide to play lower one page corresponding to lower one page button during frequency.
Realize laser pen to slide demonstration by left button button, line button, page up button and lower one page button
The control of common function.
Further, in addition to input module, memory module, infrared projection device and demonstration glasses, the infrared projection device are pacified
Mounted in camera side, first stepper motor and the second stepper motor are also able to control the angle of pitch of infrared projection device
And yaw angle, the infrared projector are connected with controller signals, the controller can control the focal length of infrared projector with
Camera is identical, and the input module, memory module signal are connected with control module signal, and the input module is used for depositing
Store up and default word is set in module, the infrared projection device can be default in memory module to being projected with infrared light on curtain
Infrared light can be converted into visible ray by word, the demonstration eyeglass.
User can be inputted by input module some be used for demonstrate prompt text, and projected by infrared projection device
Come, due to that can not be immediately seen these words using infrared light spectators, and demonstrator can see this by demonstrating glasses
A little promptings, and then user is helped on the premise of spectators are not influenceed, the demonstration of user is more successfully carried out；Infrared throwing
Shadow device is arranged on the side of camera, makes to adjust infrared projection while controller regulation camera focal length, the angle of pitch, yaw angle
Focal length, the angle of pitch and the yaw angle of device, so as to avoid the trouble of repetition adjustment infrared projection device, it is ensured that the throwing of infrared projection device
Shadow effect.
Further, the making material of an eyeglass of the demonstration glasses is ordinary resin material, the demonstration glasses
The making material of another eyeglass is the material that infrared light can be converted into visible ray.
One eyeglass is made by ordinary resin material, it is ensured that wearer can see normal picture, be easy to demonstrate
Be smoothed out.
Further, the material that infrared light can be converted into visible ray is the optics that potassium titanyl oxygenic phosphate(KTP) crystal is made
Frequency-doubling crystal material.
Optical frequency-doubling chip made of potassium titanyl oxygenic phosphate(KTP) crystal can convert infrared light to green visible, light conversion effect
Rate is high.
Further, WiFi connections are used between the control module and computer.
Notebook all has WiFi connections, therefore can avoid extra circuit using WiFi connections, simple and convenient.
Brief description of the drawings
Fig. 1 is the structural representation of the adjustment support in slide demonstration control device embodiment of the present invention.
Embodiment
Below by embodiment, the present invention is further detailed explanation：
Description of reference numerals：Second stepper motor 1, the first stepper motor 2, camera 3, infrared projection device 4.
The present embodiment slide demonstration control device includes camera 3, laser pen, adjustment support, control module, infrared throwing
Shadow device 4, input module, memory module and demonstration glasses, wherein：
Camera 3 is used for shooting the image of projecting apparatus and laser pen, and camera 3 is focus adjustable camera 3, in order to ensure to shoot
The definition and resolution ratio of picture, camera 3 is preferably Huawei VPC800 series high-definition camera 3 in the present embodiment；Camera 3
On adjustment support, supporting plate that adjustment support includes being used to install camera 3, for adjusting the of the angle of pitch of camera 3
One stepper motor 2, for adjusting the second stepper motor 1 of the yaw angle of camera 3 and for installing supporting plate and the second stepper motor 1
Pallet, pallet side welds together with the output shaft of the first stepper motor 2, and the first stepper motor 2 is fixed by screws in support
On disk, tray bottom is fixedly connected with the output shaft of the second stepper motor 1, and the output shaft of the second stepper motor 1 is vertically set；
Infrared projection device 4 is arranged on the side of camera 3, and infrared projector can adjust the angle of pitch and yaw angle with camera 3；
Laser pen can send the laser flashed with different frequency, and laser pen is provided with function button, different function buttons pair
Different flicker frequencies is answered, function button includes angle correction button, ratio correction button, left button button, line button, upper one
Page button and lower one page button；
Control module is connected with camera 3, the first stepper motor 2 and 1 equal signal of the second stepper motor, control module also with computer
Signal is connected, and WiFi connected modes are used between control module and computer, and control module is used to be tracked laser spots positioning
And it can be obtained according to the projection of the positions of laser spots and the operational control computer-made lantern slide of user, control module by camera 3
The image of projecting apparatus and the laser spots of laser pen are taken, control module can detect the flicker frequency of laser spots；In the present embodiment
Control module is made up of K60 series monolithics and corresponding peripheral circuit；
Control module can control the first step when detecting frequency of the laser dot flicker rate corresponding to angle correction button
The stepper motor 1 of stepper motor 2 and second adjusts the angle of pitch of camera 3 respectively and yaw angle to laser spots are located at camera 3 and gathered
Image center, control module can detect laser dot flicker rate for ratio correct button corresponding to frequency when adjust
The focal length of whole camera 3 to projecting apparatus image in the acquisition range of camera 3 it is maximum, control module can detect hot spot
Flicker frequency is the function of controlling computer cursor to be pressed in correspondence position execution left button when clicking frequency corresponding to button, is controlled
Module can detect hot spot flicker frequency to control computer-made lantern slide to enter paintbrush function during frequency corresponding to line button,
Control module can control computer-made lantern slide to play when detecting that hot spot flicker frequency is frequency corresponding to page up button
One page, control module can control computer-made lantern slide to broadcast when detecting that hot spot flicker frequency is frequency corresponding to lower one page button
Put down one page；
Input module, memory module signal are connected with control module signal, and input module is preferably keyboard, and input module is used for
Set default word into memory module, infrared projection device 4 can be preset to being projected with infrared light in memory module on curtain
Word；
One eyeglass of demonstration glasses is made up of ordinary resin material, and the material of another eyeglass is used by potassium titanyl oxygenic phosphate(KTP) crystal
The Optical doubling frequency crystal material being made, optical frequency-doubling chip made of potassium titanyl oxygenic phosphate(KTP) crystal can will pass through 1064nm
Infrared light be converted to the green visible that wavelength is about 532nm, it is therefore red used by infrared projection device 4 in the present embodiment
The infrared light wavelength of external transmitter is arranged to 1064nm.
The present embodiment in use, be arranged on camera 3 and infrared projection device 4 on adjustment support, then opening swashs first
Light pen, laser spots are placed into the center of projector pattern, press angle correction button, laser spots are according to default frequency
Rate is flashed, and control module is collected the position of laser spots and the flicker frequency of laser spots by camera 3, flashed according to laser spots
Angle correction function is being currently used in frequency judgement, and control module controls the first stepper motor 2 to rotate, and then adjusts camera
3 angle of pitch, when detecting that laser spots are located at the center of the vertical direction of the coverage of camera 3, stop the first stepping electricity
Machine 2, then control the second stepper motor 1 to rotate, adjust the yaw angle of camera 3, until laser spots are located at the coverage of camera 3
Horizontal direction on center, then press ratio correction button, laser spots are with other frequency scintillation, control module control
Make and adjust the focal length of camera 3, and then the scope that constantly regulate camera 3 is shot, until projector pattern is upper following
Boundary or right boundary overlap with the up-and-down boundary or right boundary of the coverage of camera 3, are now wrapped in the coverage of camera 3
Containing complete and maximum projector pattern, control module is connected by WiFi with computer, user can pass through input
Module input some be used for demonstrate prompt text, and wear demonstration glasses, then can starts slide demonstration, demonstrator
The broadcasting of lantern slide can be controlled by function buttons such as lower one page, page ups, control module can obtain laser spots in real time
Position and flicker frequency, the control to computer-made lantern slide presentation process, infrared projection are then converted to by coordinate transform etc.
Device 4 will be prompted to word and be cast out with infrared light, due to these words can not be immediately seen using infrared light spectators, and
Demonstrator can see these promptings by demonstrating glasses, and then help to demonstrate to be smoothed out.
Above-described is only embodiments of the invention, and the general knowledge such as known concrete structure and characteristic is not made herein in scheme
Excessive description, technical field that the present invention belongs to is all before one skilled in the art know the applying date or priority date
Ordinary technical knowledge, prior art all in the field can be known, and with using normal experiment hand before the date
The ability of section, one skilled in the art can improve and implement under the enlightenment that the application provides with reference to self-ability
This programme, some typical known features or known method should not implement the application as one skilled in the art
Obstacle.It should be pointed out that for those skilled in the art, without departing from the structure of the invention, it can also make
Go out several modifications and improvements, these should also be considered as protection scope of the present invention, these effects implemented all without the influence present invention
Fruit and practical applicability.The scope of protection required by this application should be based on the content of the claims, the tool in specification
The records such as body embodiment can be used for the content for explaining claim.
Claims (6)
1. slide demonstration control device, including camera and laser pen, it is characterised in that：The camera is taken the photograph for adjustable focal length
As head, laser pen can send the laser flashed with different frequency, and the laser pen is provided with function button, and different functions is pressed
Key corresponds to different flicker frequencies, and the function button includes angle correction button and ratio correction button, in addition to：
Support is adjusted, the adjustment support is used for installing camera, and the adjustment support, which is provided with, to be used for adjusting camera pitching
First stepper motor at angle and for adjusting the second stepper motor of camera yaw angle；
Control module, the control module are connected with camera, the first stepper motor and the equal signal of the second stepper motor, the control
Molding block is also connected with pcs signal, and the control module is used to be tracked laser spots positioning and according to the position of laser spots
With the projection of the operational control computer-made lantern slide of user, the control module can by camera obtain projecting apparatus image with
And the laser spots of laser pen, the control module can detect the flicker frequency of laser spots, the control module can detect
First step stepper motor and the second stepper motor point are controlled when to laser dot flicker rate being the frequency corresponding to angle correction button
Not Tiao Zheng camera the angle of pitch and yaw angle to laser spots be located at camera collection image center, the control module energy
Enough focal lengths that camera is adjusted when detecting laser dot flicker rate as ratio and correcting the frequency corresponding to button are to projecting apparatus
Image it is maximum in camera acquisition range.
2. slide demonstration control device as claimed in claim 1, it is characterised in that：The function button is also pressed including left button
Key, line button, page up button and lower one page button, the control module can detect hot spot flicker frequency for list
The function of controlling computer cursor to be pressed in correspondence position execution left button when hitting frequency corresponding to button, the control module can
When detecting that hot spot flicker frequency is frequency corresponding to line button, control computer-made lantern slide enters paintbrush function, the control
Module can control computer-made lantern slide to play page up when detecting that hot spot flicker frequency is frequency corresponding to page up button,
The control module can control computer-made lantern slide to broadcast when detecting that hot spot flicker frequency is frequency corresponding to lower one page button
Put down one page.
3. slide demonstration control device as claimed in claim 1, it is characterised in that：Also include input module, memory module,
Infrared projection device and demonstration glasses, the infrared projection device are arranged on camera side, first stepper motor and second step
Stepper motor is also able to control the angle of pitch and yaw angle of infrared projection device, and the infrared projector connects with controller signals
Connect, the controller can control the focal length of infrared projector identical with camera, and the input module, memory module signal are equal
It is connected with control module signal, the input module is used for setting default word, the infrared projection device energy into memory module
It is enough to default word in memory module is projected with infrared light on curtain, the demonstration eyeglass can turn infrared light
Turn to visible ray.
4. slide demonstration control device as claimed in claim 3, it is characterised in that：One eyeglass of the demonstration glasses
Making material is ordinary resin material, and the making material of another eyeglass of the demonstration glasses can for that can be converted into infrared light
See the material of light.
5. slide demonstration control device as claimed in claim 4, it is characterised in that：It is described infrared light can be converted into it is visible
The material of light is the Optical doubling frequency crystal material that potassium titanyl oxygenic phosphate(KTP) crystal is made.
6. slide demonstration control device as claimed in claim 1, it is characterised in that：Adopted between the control module and computer
Connected with WiFi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710741747.6A CN107506055B (en) | 2017-08-25 | 2017-08-25 | Slide show control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710741747.6A CN107506055B (en) | 2017-08-25 | 2017-08-25 | Slide show control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107506055A true CN107506055A (en) | 2017-12-22 |
| CN107506055B CN107506055B (en) | 2020-05-22 |
Family
ID=60693652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710741747.6A Expired - Fee Related CN107506055B (en) | 2017-08-25 | 2017-08-25 | Slide show control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107506055B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196702A (en) * | 2017-12-27 | 2018-06-22 | 威创集团股份有限公司 | A kind of splicing video wall interactive approach and system, laser pen |
| CN110213407A (en) * | 2019-05-28 | 2019-09-06 | Oppo（重庆）智能科技有限公司 | A kind of operating method of electronic device, electronic device and computer storage medium |
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|---|---|---|---|---|
| US20070273845A1 (en) * | 2006-05-26 | 2007-11-29 | Tom Birmingham | System and method for multi-directional positioning of projected images |
| CN101620485A (en) * | 2009-07-16 | 2010-01-06 | 广东威创视讯科技股份有限公司 | Device and method for positioning light source |
| CN102945091A (en) * | 2012-11-20 | 2013-02-27 | 深圳市中科睿成智能科技有限公司 | Method and system for man-machine interaction and based on laser projection location |
| CN106598288A (en) * | 2016-11-22 | 2017-04-26 | 张新民 | Positioning system and method for laser pen mouse |
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2017
- 2017-08-25 CN CN201710741747.6A patent/CN107506055B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070273845A1 (en) * | 2006-05-26 | 2007-11-29 | Tom Birmingham | System and method for multi-directional positioning of projected images |
| CN101620485A (en) * | 2009-07-16 | 2010-01-06 | 广东威创视讯科技股份有限公司 | Device and method for positioning light source |
| CN102945091A (en) * | 2012-11-20 | 2013-02-27 | 深圳市中科睿成智能科技有限公司 | Method and system for man-machine interaction and based on laser projection location |
| CN106598288A (en) * | 2016-11-22 | 2017-04-26 | 张新民 | Positioning system and method for laser pen mouse |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196702A (en) * | 2017-12-27 | 2018-06-22 | 威创集团股份有限公司 | A kind of splicing video wall interactive approach and system, laser pen |
| CN110213407A (en) * | 2019-05-28 | 2019-09-06 | Oppo（重庆）智能科技有限公司 | A kind of operating method of electronic device, electronic device and computer storage medium |
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| Publication number | Publication date |
|---|---|
| CN107506055B (en) | 2020-05-22 |
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