1. Touchless Touchscreen
- Saptarshi Dey,
CSE, 3rd Year,
MCKVIE

2. Touchscreen….. A Quick Recap
Common in devices such as game consoles, Pcs,mobiles,etc.
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

3. How Touchscreen Works
TouchSensor
Controller
Software Driver

4. Problems faced by touchscreen users

5. Screen Cracked!!!
Finger Marks!!!!

6. What is Touchscreen Technology?
It works by detecting hand movements in front of it.
In Touchless Touchscreen the there is no physical contact between the user and the device

7. Technology behind this
This is based on optical pattern recognition using a solid state optical matrix sensor
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. Optical Matrix Sensor
In each of these sensors there is a matrix of pixels
Each pixel is coupled to photodiodes incorporating charge storage regions.

9. Workflow Light enters to the sensor and hits the pixel matrix
Moving Images in front of the sensor
Detected by the sensor
Light enters to the sensor and hits the pixel matrix
The sensor generates electric signals
The photodiodes inside the pixel converts incoming light into electric charge
Signals are processed by a DIP to provide output to the devices

10. APPLICATIONS…….

11. Touchless Monitor

12. 3D Navigation of Hand Movements in Touchless Screen

13. Glimpses of GBUI

14. Touchscreen Demo

15. Drawbacks Advantages Not much, except the line of sight
No de-sensitization of screen
Can be controlled from a distance
Useful for physically handicapped people

16. Conclusion Touchless Technology is still developing
Many Future Aspects
With this in few years our body can become a input device