Parameters:
Machine Model Billund Belong-80SP
3200 lumens Display Technology 3LCD technology 3X0.63-inch polysilicon TFT LCD panel Brightness 3200 lumens
1 On the ratio of 500:1
Standard resolution XGA (1024x768)
Compatible resolution VGA SVGA XGA SXGA WXGA UXGA
1.2X zoom lens, projection lens f = 18.53 ~ 22.18mm F/1.65 ~ F/1.93
SHP 220 W light bulb
3000-4000 hours lamp life (ECO)
Fan noise 30dB @ ECO
Projection size of 40 to 300 英寸 projection than 1.45 ~ 1.73
Scanning frequency levels 31 to 92 kHz Vertical 48 to120 Hz 
Colors, NTSC / NTSC 4.43 / PAL (including PAL-M, N) / SECAM/PAL60 
Video Compatibility 480i / p 576i / p 720p 1080i 
Keystone correction vertical + / -30 °
Input Interface RGB: Mini D-sub 15pin x 1 DVI-I X 1 Composite Video: RCA X 1 S-Video X 1
Audio mini jack x 2 RCA (L, R) x 1 Composite video: RCA x 3
USB mouse control interface type BX1
Control Interface RS-232D-sub 9 pin x 1
Network interface (RJ45) Optional speaker 8W x 1
Dimensions 325 x 97 x 260 mm 
Net weight 2.7 kg
Start cooling time 10 seconds Power source AC 100 TO 240 V 50/60 Hz
Power Max. 310W Standby <2.6W

Intelligent Interactive projector features:
Directly at the projector out of the projection screen to do any computer function click, Internet, writing, text, graphics, no need to add any equipment; 
Baton or with the wireless pen operation is very convenient to use;
Then comes with easy-utility software;
Distance learning can be done with computers and video conferencing

Interactive whiteboard works diagram

Working principle: the principle is divided into pressure sensitive whiteboard theory and principle of laser tracking of two. Principle of using pressure sensitive touch white board equivalent of a computer touch screen, a finger or a brush and the options displayed on the screen to complete the work specified in human-machine interactive input device.  This has two internal sense of laminated whiteboard, whiteboard surface, a point when under pressure, the two films at this point cause a short circuit, the electronic controller to detect pressure points of coordinates (a finger or brush and the location), through RS232 interface into the computer. Use the principle of laser tracking

The white board on both sides of the top emitter of a laser. Whiteboard starts, laser emitted laser fire whiteboard surface characteristics document with laser sensor function to feedback pen position.

1) Computer Interface: Interface type refers to the whiteboard with the computer system is how to connect. Common types of parallel port interface (also known as IEEE 1284) and the serial port (also known as RS-232 interface) and USB interfaces. The core of the quality of technical decisions whiteboard, but technology alone can not represent the entire product.

2) Stability: Stability is the product (including hardware) the stability of the aid of market experience and the experience of older users, easy to determine product stability;

3) Sensitivity: draw a line on the board, if the line is not strong continuity, it shows sensitivity is not high;

4) Accuracy: accuracy is calibrated, the mouse cursor tip pen tip and the degree of coincidence;

5) Resolution: Resolution is the number of points in each line (or pixel) number. Usually along a screen or monitor the horizontal and vertical edges to represent the number of points;

6) Output: whiteboard to write on the whiteboard content through a certain way to scan and print them out.Printout of the way to have thermal, inkjet and ribbons, etc.;

7) panel size: refers to the actual size of the whiteboard, the unit is mm, usually refers to the whiteboard length × width;

8) Effective reading size: refers to the whiteboard can be written using the effective size in this region can be written and to copy any output, its size generally smaller than the actual panel size;