To truly understand the ShadowSense advantage, it’s important to explore other touch technologies, how they work, and what they can do.
Infrared touch screens operate by calculating light-beam interruption, or “beam break”, to determine the location of touch events. This is a perimeter-based touch technology differing from Surface Acoustic Wave, in that infrared light beams are used and not ultrasonic waves.
Using LEDs and light sensors placed on the vertical and horizontal axis of a bezel, the Infrared system casts a grid of light across the screen. When an object touches the screen, it interrupts the light beams on the grid causing the light to be blocked from the sensor. This loss of light is used to determine the location of the touch. Since the LEDs and sensors make a grid, the touch results in an X and Y coordinate from the beam break. These coordinates then communicate with the display to react with the software on screen.
|Operates with gloves or wet hands||●||●|
|Durable & long lasting||●||●|
|4K touch resolution||●||●|
|Ambient light immunity||●||●|
|Object transparency detection||●||●|
|False touch rejection||●||●|
|Touch response time||10 ms and up||under 10 ms|
Infrared touch screens have several issues that can impact their performance. ShadowSense touch screens are similar to infrared touch screens as both use infrared light and both have sensors, but that is where the similarity ends. ShadowSense has significant advantages over conventional infrared touch technology. Curious? – discover the ShadowSense advantage.