The I-Tech Virtual Keyboard
What is it?
The Virtual Laser Keyboard (VKB) uses both infrared and laser technology to generate an invisible field and project a full-size virtual QWERTY keyboard on any surface.
You can use the VKB (Virtual PC Keyboard) with both your laptop and PC or with a compatible mobile device, Smartphone and PDA.
The I-Tech VKB reacts exactly like a real keyboard.
Direction technology based on optical recognition enables the user to tap the images of the keys, complete with realistic tapping sounds(!), which feeds into the compatible PDA, Smartphone, laptop or PC.
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How does it work?
Step 1: Template creation (Projection Module)
A template of the desired interface is projected onto the adjacent interface surface. The template is produced by illuminating a specially designed, highly efficient holographic optical element with a red diode laser.
Note: the template serves only as a reference for the user and is not involved in the detection process. In a fixed environment, the template can just as easily be printed onto the interface surface.
Step 2: Reference plane illumination (Micro-illumination ModuleTM)
An infra-red plane of light is generated just above, and parallel to, the interface surface. This light is invisible to the user and hovers a few millimeters above the surface.
When the user touches a key position on the interface surface light is reflected from this plane in the vicinity of the key and directed towards the sensor module.
Step 3: Map reflection coordinates (Sensor Module)
Reflected light from user interactions with the interface surface is passed through an infra-red filter and imaged on to a CMOS image sensor in the sensor module.
Custom hardware embedded in the sensor chip (the Virtual Interface Processing CoreTM) then makes a real-time determination of the location of the reflected light.
The processing core can track multiple reflection events simultaneously and can thus support both multiple keystrokes and overlapping cursor control inputs.
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