Optical touch screen utilize CMOS/CCD camera. Receive Infrared reflection bar data. Get the coordinates by calculating reflection bar.

Please see following specification:

Because of optical technology theory defect, it reaches 2-touchs and be easy to read wrong coordinates. Though could reach 4-touchs by adding camera, it is also exist reading wrong coordinates. Surface Light Wave is easy to reach 10, 16, 32 points

Optical touch screen utilize camera, then add the touch frame thickness. Surface Light wave don’t have this problem, only 5mm.

Multitouch Technology	Surface light wave
Touch Activation Force	Zero
Transmittance	100%(92% contain glass)
Report Resolution	32767x32767
Minimum Tracking Size	3mm×3mm
Minimum Tracking Distance	3mm
Surface Hardness	Moh's 7H
Fault Tolerance	Even up to 10% sensor broken, still work
Touching points	2,4,6,10,16,32,48
Workin voltage	4.75-5.25V
Average current	<300mA
Power	1.5W-2.25W
Max current	<450mA
Sleep current	<10mA
Response time	<10ms
Interface	USB 2.0 HID optional
Touch Refresh rate	95-105Hz
Lifetime	60,000 Hours
Life span	Sensor:5000H Total Sensor:100,000H Saving Mode:1,000,000H
Recognize material shape	Support
Control material	Opaque Object
OS	Win XP, Win Vista, Win 7, Win 8,
Multi Touch Protocol	TUIO protocol(UDP Mode),TUIO Adobe Flash Mode(TCP Mode) Win 7 Multitouch HID protocol
Size Available	15-200 inch+
Humidity	Working/storage up to 90%
Temperature Range	Working:-25℃-50℃ Storage:-40℃-85℃
Package	Carton
Package size	Optional
Weight	Optional

 

Infrared touch tech. the X, Y direction are arranged in uniform infrared emission tube and infrared receiver tube, format cross-horizontal infrared matrix. the finger block the light when you touch.

The controller determines the location of touch points on the screen.

Infrared touch screen can’t achieve real multi-touch, only through time-arrange technology realize pseudo 2-point touch, and multi-touch. the touch affection is very bad in this situation. IR tech is commonly called "1.5-touch tech." because of theory defect, the problem can’t solve.

Resolution: IR touch screen Physical resolution is only 300*300.reporting resolution is 4096*4096.the program usually have staircases slash.

Surface Light Wave Physical resolution is 1000*1000.reporting resolution is 32767*32767.can distinguishes minor jitter.

Support sharp recognition. Infrared touch technology can not distinguish a specific shape.

Surface light wave technology can support shape recognition, such as cup and cell phone, and support recognize multiple objects at the same time.

Anti-interference infrared touch frame can not adapt to strength light environments. Surface Light Wave uses a new anti-jamming technology. It can adapt strength light environments.

 

  

  

ITD could offer you SLW touch monitors or SLW touch panels from 19” to 82”. Custom-made service is also available. For more information, please contact sales@itd-tech.com

Next：Display Modules for Various Industries
Previous：Industrial LCD monitors usage in varied environmental conditions offered by ITD