How to upgrade LED screen to touch screen

How to upgrade LED screen to touch screen At present, the LED large screen is upgraded to interactive touch screen in the market, and most of them use infrared frame and radar to realize interaction
These two methods have their own disadvantages
The radar has the problems of troublesome installation and insufficient accuracy, which can not reach the high accuracy level of writing and closing windows; There is no problem with the accuracy of the infrared frame, but it needs to be customized
The larger the picture, the more expensive it is
The frame needs to be installed, and the manual positioning and debugging is also more complex; In conclusion, these two schemes do not meet the market demand
Here is an easy to see laser touch technology, which is affordable High precision, easy installation, automatic positioning, frameless scheme, how to realize the interaction of LED screen Description of advantages of laser interaction: large screen: support 3 * 36m large screen touch control, high precision: touch accuracy up to 2mm, can achieve writing accuracy, no frame: the two sensors are only fist size, no frame
High frame rate: fast response speed
Products above 120 inches are 2-3 times faster than infrared frames
Installation and debugging: 5S automatic positioning gesture function: support 10 kinds of gesture recognition of win and whiteboard
Multi screen fusion: support 6-channel projection fusion, giving users an immersive interactive projection experience
1
Principle of laser touch
The laser touch interactive module is simple in structure and consists of two parts: laser transmitter and signal receiver camera
The laser transmitter is installed on any screen (projection screen, LED screen, LCD splicing screen, etc
), forming an invisible light film 1-2mm higher than the surface and about 1mm thick on the screen surface
When the finger or any opaque object contacts the surface, the light is reflected on the image sensor (camera) set above the screen, and then the coordinates of the mouse are obtained through the accurate calculation of the photoelectric position Application scenario: the laser touch interactive module can be combined with any screen (such as projector, LED screen / floor tile screen, splicing screen, transparent screen, holographic screen, etc
) to turn the ordinary display screen into a large touch screen with high precision, large picture and no frame
It can be used in exhibition halls, exhibition halls, science and technology museums, art galleries, multimedia conference rooms, multi-functional teaching, new retail, children's entertainment, immersive interactive projection and other fields 2
Easy to see laser touch upgrade LED screen to touch screen detailed description Installation instructions for laser touch control of LED screen installation of signal receiver (camera): the camera module is installed on the ceiling or wall hanging in front of the screen through universal support, and the installation and fixation are firm to ensure that the camera module cannot shake
1
The installation position of a single camera is the center position of the corresponding whole splicing screen
2
The installation position of the two cameras is to divide the whole splicing screen equally into two halves, which corresponds to the middle position of the two halves
The left camera takes the left part and the right camera takes the right part
By analogy, it can support 4 camera splicing cascades
3
The camera is standard equipped with a 12 meter USB cable connected to the computer; If the cable length is not enough, use the USB extension cable with power supply
4
The installation and fixing method of the camera is the universal support (strong adhesive) of the ordinary height ceiling
The ultra-high is hung on the wall with the telescopic support or the ceiling, and the support screw is fixed
Laser installation instructions: 1 The laser is fixed 5-20cm away from the center of the upper edge of the splicing screen; The laser adopts 6m USB power line and 3
3v/2a adapter to connect with strong current
The laser is installed on the same plane as the LED screen
2
When multiple lasers need to be installed on large-size LED display screen, take four as an example; The interactive picture needs to be divided into 4 equal parts, and the laser is installed in the middle of each equal part Multiple lasers are installed, each of which needs to be fixed and connected to strong current separately; Each individual commissioning can be qualified Software installation and debugging: install IWB software on the computer; Debug the camera picture on the interface to ensure that the camera takes the whole LED screen picture; Then, in the laser mode, adjust the light film by adjusting the knob on the laser, so that the light film is tiled on the picture about 3mm higher than the surface; Execute automatic positioning
After 5S positioning is successful, it can be used by touch Technical parameter setting , Bit: automatically correct the number of touch points: ten points (multiple pens are required for pen touch) delay , When: & le; 30ms push-pull mode: the software automatically controls the push-pull filter to enhance the stability
Touch mode: finger touch, pen touch, laser imaging technology (lict) positioning accuracy: the deviation is less than 2 pixels, projection ratio: 0
15-1
36 laser wavelength: 808nm, total power consumption: 5W, optical power: 280mW * 2 electricity , Source: 3
3v/2a signal receiver: 120 frames / second weight , Quantity: 0
5kg system requirements: windows7 / 8 / 10 Comparison table between laser touch scheme and infrared frame scheme in summary, both schemes are high-precision interactive schemes, which are comprehensive comparison
Laser touch still has obvious advantages: infrared frame: 1 The appearance is not enough
The screen has a black border
More than 2
100 inches need to be customized, which is expensive
3
Trouble in installation and commissioning, manual calibration
Laser interaction 1 Beautiful and interactive without borders
2
A single set can realize 3M * 4
5m interaction, and the 6-level connected screen supports 3 * 30m high-precision touch control, which can be applied to immersive interactive projection
3
2mm high precision touch control
4
Automatic positioning, completed in 5 seconds, easy to install and debug