2. Touchscreen…..
A Quick Recap
A touchscreen is an electronic visual display that the
user can control through simple or multi-touch gestures
Can be controlled by fingers or by a special styles/pen Common in devices such as game consoles, Pcs,mobiles,etc.
6. In Touchless Touchscreen the there is no physical contact between the user and the
device
It works by detecting hand movements in front of it.
7. This is based on optical pattern recognition using a solid state optical
matrix sensor
This sensor is then connected to a digital image processor, which
interprets the patterns of motion and outputs the results as signals
8. In each of these sensors there is a matrix of pixels
Each pixel is coupled to photodiodes incorporating charge storage regions.
9. Moving
Images in front
of the sensor
Detected by
the sensor
Light enters to
the sensor and
hits the pixel
matrix
The photodiodes
inside the pixel
converts incoming
light into electric
charge
The sensor
generates
electric signals
Signals are
processed by a
DIP to provide
output to the
devices
10.
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15. Advantages
No de-sensitization of screen
Can be controlled from a distance
Useful for physically handicapped people
Drawbacks
Not much, except the line of sight
16. Touchless Technology is still developing
Many Future Aspects
With this in few years our body can become a
input device