CN202976030U - Infrared laser wireless no-screen electronic whiteboard - Google Patents
Infrared laser wireless no-screen electronic whiteboard Download PDFInfo
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- CN202976030U CN202976030U CN 201220154018 CN201220154018U CN202976030U CN 202976030 U CN202976030 U CN 202976030U CN 201220154018 CN201220154018 CN 201220154018 CN 201220154018 U CN201220154018 U CN 201220154018U CN 202976030 U CN202976030 U CN 202976030U
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- electronic whiteboard
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- infrared
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Abstract
The utility model discloses an infrared laser wireless no-screen electronic whiteboard which belongs to the field of teaching equipment. The infrared laser wireless no-screen electronic whiteboard is characterized in that: a receiver communicates with a computer through Bluetooth wireless communication technique; and the infrared laser wireless no-screen electronic whiteboard can simultaneously support writing of a red or blue laser pointer or touch control infrared writing pen on a projection area of a projector and computer operation.
Description
Affiliated technical field
The utility model relates to a kind of identification infrared ray motion track, and particularly a kind of ultrared motion track and computer mouse are controlled combines, to realize controlling the wireless without shielding electronic whiteboard of computer with red laser, green laser or infrared light sources.
Background technology
At present, known electronic whiteboard needs a special-purpose blank with circuit control that adopts hitech materials to make on hardware, carry out wire communication by proprietary connecting line and computer, need simultaneously install driver on computers to complete the communication function with computer.
The electronic whiteboard user can be with finger or special-purpose electronic pen direct control computer on electronic whiteboard, realizes writing and the function such as computer desktop mark by software.
According to electronic whiteboard realize technological means distinguish induction, resistance pressure-sensitive is arranged, the type electronic whiteboard such as infrared type.No matter adopt which kind of technological means, all can't do without needing the blank that electronic circuit is installed, we are referred to as " the screen electronic whiteboard is arranged " usually.
Development along with technology, electronic whiteboard is progressively from " having screen " to " without screen " future development, that is to say that the function that realizes electronic whiteboard might not need that piece to comprise the blank of electronic circuit, but independent the circuit part in electronic whiteboard, making separately an equipment installs in addition, this equipment is referred to as " orientator " or " receiver " usually, original " screen " can be vertical surface any white, that the also suitable Projection Display of diffuse reflection is used, such as the metope of projection screen or white.This electronic whiteboard is called " without the screen electronic whiteboard ".
" without the screen electronic whiteboard " distinguished according to the technological means that realizes surface acoustic wave type and the large class of camera head type two.Pen (electronic pen) occurs by surface acoustic wave receiver and sound wave and forms in the surface acoustic wave type electronic whiteboard, realizes the coordinate setting of electronic pen according to the know-why of three-point fix.Due to surface acoustic wave can only transmit on even curface just can be not impaired, therefore this electronic whiteboard is not suitable for using on projection screen, can only use in hard smooth projection surface.
The core component of camera head type electronic whiteboard receiver is camera, and electronic pen is an infrared light supply, and the position of positioning mouse is come in the position of the light source of seeing according to camera.Simple camera head type electronic whiteboard receiver is exactly a camera, by the USB line, the transmission of video images that camera photographs is arrived computer, process by the computer software of installing the video acquisition data of inputting by USB port, determine the position of the infrared light supply that electronic pen sends.The advantage of this camera head type electronic whiteboard is to go for any Projection Display surface, comprises projection screen or the large-screen receiver that uses as display etc.Shortcoming is that Performance Ratio is lower, has write hysteresis phenomenon, and using on the low side computer has obvious operating delay.Main cause is that computer will be born a large amount of infrared light supply position calculation tasks, and will process the video image of at least 30 frames a common second, and a large amount of video image Processing tasks has consumed the hardware resource of computer.
Summary of the invention
The utility model provides a kind of camera head type without screen electronic whiteboard receiver, has particularly overcome existing camera head type without the defective on screen electronic whiteboard receiver performance and the wiring problem that needs USB line transmitting video data to bring.
The utility model will determine that the video image of infrared light supply position processes computing and move on to receiver from the host computer end and bring in and complete.Receiver is directly processed vedio data, the identification infrared light sources also obtains the positional information of light source, then the positional information of infrared light supply is transferred to computer by wireless communication technique, computer does not again need to bear the task of processing vedio data, has greatly improved system effectiveness.
The utility model has been realized wireless telecommunications, and receiver carries out communication by bluetooth wireless communication technology and computing machine, can support simultaneously redness or blue laser pen and touch infrared light lettering pen to write and operating computer in the projection in zone of projector.
Receiver of the present utility model adopts 4 LED lamps to show the battery electric quantity situation.
Infrared light and redness or green laser are installed by filter on receiver casing of the present utility model, can absorb visible light, allow the non-visible light in infrared light and redness or green laser pass through.
The utility model has adopted the multiple power sources scheme, not only can use the dry cell power supply of No. 5 1.5V of 2 joints, also can external 5V direct supply, exchange by using 220V the transformer that turns the 5V direct current, indirectly can adopt the electric main of 220V as power supply of the present utility model.
The technical matters that solves
Technical problem to be solved in the utility model is to provide a kind of camera head type without the screen electronic whiteboard, adopting receiver end to carry out video image processes and wireless communication technique, greatly improve system effectiveness, simultaneously, support to support the multiple power sources scheme with redness or green laser pen and infrared light lettering pen operating computer.
Technical scheme
The purpose of this utility model is to realize like this.
The installation infrared line passes through filter in the camera front of receiver, filter out visible light, allow sightless infrared ray pass through, the video reflection that captures of camera only only has the infrared light image like this, other visible images have all become black, and infrared ray reflection is also grayscale image, are not chromatic images, simple like this image processing operations has improved the efficient that image is processed.
Image is processed and is adopted the detected image pixel value to confirm infrared light sources greater than the picture element of 0xAAAAAA (sexadecimal) as the method for infrared light spot, and algorithm is simple, has improved arithmetic speed.
Wireless communication technique adopts blue-tooth technology, obtains the co-ordinate position information of infrared light sources from graphics processing unit by the I2C bus interface, sends to host computer to process.
Power supply adopts the dry cell of 3 joint 1.5V, perhaps transforms by voltage external 5V voltage step-down is arrived 3.3V, comes which kind of power supply of choice for use with Double-phase switch.
Beneficial effect
The beneficial effects of the utility model are, have improved the reaction velocity without the screen electronic whiteboard, and the hardware requirement of host computer is reduced greatly, have greatly improved system performance.With wired trouble of exempting installation wiring of wireless generation, support laser pen to control the function that computer has realized carrying out 50 meters distances far away the operated from a distance computer.
Description of drawings
Fig. 1 is application schematic diagram of the present utility model
Fig. 2 is the system architecture schematic diagram of the utility model receiver.
Embodiment
Below in conjunction with embodiment and accompanying drawing, use of the present utility model is described further.
In Fig. 1, projector 5 is connected to computer 4 by signal wire, and electronic whiteboard receiver 3 is connected to obtain the 5V direct supply that computer 4 is exported by USB port with computer 4 by the USB connecting line.Projector 5 amplifies demonstration to the information projection of computer 4 to projection screen 1, the user uses directly operating computer or write on projection screen 1 of lettering pen 2.
Infrared laser shown in Figure 2 is wireless without screen electronic whiteboard receiver, comprise graphics processing unit, wireless transmission unit and power-supply unit, graphics processing unit by the I2C data bus with video image processing result information data transmission to wireless transmission unit, wireless transmission unit sends to host computer to result by the bluetooth communication agreement again.
Graphics processing unit comprises with infrared camera and video image processor by filter.Resolution ratio of camera head can reach the 1024*768 pixel, horizontal view angle (HFOV) 42 degree, and vertical angle of view (VFOV) 32 degree are with the speed acquisition image of per second 60 frames.Video image processor carries out the hardware level image to be processed, and directly reads the vedio data of camera, can identify 4 infrared light spots simultaneously, and export the positional information of infrared light spot with the I2C bus, and output rating can reach 200Hz.
Wireless transmission unit comprises I2C bus read module and bluetooth communication microprocessor.I2C bus read module as core parts, has been stored handling procedure and receiver No. ID with EEPROM inside EEPROM, it utilizes the bluetooth communication microprocessor that the infrared light spot coordinate information that graphics processing unit produces is sent to host computer.
Power-supply unit provides the direct supply of 3.3V for whole circuit, input voltage can be 3.3V or 5V.
Infrared light, redness or green laser are installed by filter on receiver casing, can absorb visible light, allow the non-visible light in infrared light, redness or green laser pass through.
Experiment showed, that also utility model has improved wired class greatly without the system performance of screen electronic whiteboard, can realize the requirement that arbitrary speed is write fully, dependable with function is all very high.
Claims (4)
1. infrared laser is wireless without the screen electronic whiteboard, it is characterized in that: receiver carries out communication by bluetooth wireless communication technology and computing machine, can support simultaneously redness or blue laser pen and touch infrared light lettering pen to write and operating computer in the projection in zone of projector.
2. infrared laser according to claim 1 is wireless without the screen electronic whiteboard, it is characterized in that: receiver adopts 4 LED lamps to show the battery electric quantity situation.
3. infrared laser according to claim 1 is wireless without the screen electronic whiteboard, it is characterized in that: infrared light is installed by filter on receiver casing, can absorbs visible light, allow infrared light pass through.
4. infrared laser according to claim 1 is wireless without the screen electronic whiteboard, it is characterized in that: redness or green laser are installed by filter on receiver casing, can absorb visible light, allow the non-visible light in redness or green laser pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220154018 CN202976030U (en) | 2012-04-10 | 2012-04-10 | Infrared laser wireless no-screen electronic whiteboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220154018 CN202976030U (en) | 2012-04-10 | 2012-04-10 | Infrared laser wireless no-screen electronic whiteboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202976030U true CN202976030U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220154018 Expired - Fee Related CN202976030U (en) | 2012-04-10 | 2012-04-10 | Infrared laser wireless no-screen electronic whiteboard |
Country Status (1)
| Country | Link |
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| CN (1) | CN202976030U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105630252A (en) * | 2016-04-05 | 2016-06-01 | 苏州佳像视讯科技有限公司 | Trajectory tracking camera |
-
2012
- 2012-04-10 CN CN 201220154018 patent/CN202976030U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105630252A (en) * | 2016-04-05 | 2016-06-01 | 苏州佳像视讯科技有限公司 | Trajectory tracking camera |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LIN BANGDING Free format text: FORMER OWNER: VANCIFIC TECHNOLOGY (BEIJING) CO., LTD. Effective date: 20141013 Owner name: ZHEJIANG HLBOARD INFO-TECH CO,. LTD. Free format text: FORMER OWNER: LIN BANGDING Effective date: 20141013 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 334119 SHANGRAO, JIANGXI PROVINCE TO: 310000 HANGZHOU, ZHEJIANG PROVINCE Free format text: CORRECT: ADDRESS; FROM: 100081 HAIDIAN, BEIJING TO: 334119 SHANGRAO, JIANGXI PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20141013 Address after: Hangzhou City, Zhejiang province 310000 Binjiang District Jianye Road No. 511 Building 2 Room 201, China Patentee after: ZHEJIANG HANLINBODE INFORMATION TECHNOLOGY CO.,LTD. Address before: 334119 Jiangxi city of Shangrao province Shangrao County Lu Zhen Meng Lin Chun Village No. 3 Patentee before: Lin Bangding Effective date of registration: 20141013 Address after: 334119 Jiangxi city of Shangrao province Shangrao County Lu Zhen Meng Lin Chun Village No. 3 Patentee after: Lin Bangding Address before: 100081, room 683, building 5, 9069 South Avenue, Haidian District, Beijing, Zhongguancun Patentee before: VanCifiC SCienCe and TeChnology(beijing)Corporation Ltd. |
|
| DD01 | Delivery of document by public notice |
Addressee: Lin Haizhu Document name: payment instructions |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Lin Haizhu Document name: Notice of termination of patent right |
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| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20210410 |
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| CF01 | Termination of patent right due to non-payment of annual fee |