TouchlessTouchscreen

- Saptarshi Dey,CSE, 3rd Year,

MCKVIE

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.

How Touchscreen Works

TouchSensor

Controller

Software Driver

Problems faced by touchscreen users

Finger Marks!!!!Screen Cracked!!!

What is Touchscreen Technology?

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.

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

Optical Matrix Sensor In each of these sensors there is a matrix of pixels Each pixel is coupled to photodiodes incorporating charge storage regions.

WorkflowMoving 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

APPLICATIONS…….

Touchless Monitor

3D Navigation of Hand Movementsin Touchless Screen

Glimpses of GBUI

Touchscreen Demo

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

Conclusion

Touchless Technology is still developing

Many Future Aspects

With this in few years our body can become a input device