A Touchscreen

Between 2007 and 2013, capacitive touchscreens overtook resistive touchscreens in the consumer electronics market.

Invention – The 1^st touch screen was invented in 1965 by E.A. Johnson of U.K, a capacitive device.

Function – It is a surface that combines 2 functions

- To receive inputs for a computer (say, tapping on an app)
- To display the output (launching the app).
Working – It consists of 3 main components

A touch sensor – It has an electrical current going through it and touching the screen causes a voltage or signal changes which are used to determine the location of the touch.

Main technology used in sensors are

- Resistive
- Capacitive
- Surface Acoustic Wave(SAW)
- Infrared LED or Optical

A controller – It takes information’s from the touch sensor and translates it into information the PC can understand.

A software Driver – It allows the touch screen and computers to work together.

Applications – Smartphones, ATM machines, TVs, refrigerators, e-readers, billing systems, and electronic voting machines (EVMs).

Source:

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GS-III : S&T S&T

23 December, 2023
2 Min Read

A Touchscreen

Between 2007 and 2013, capacitive touchscreens overtook resistive touchscreens in the consumer electronics market.

Invention – The 1^st touch screen was invented in 1965 by E.A. Johnson of U.K, a capacitive device.
Function – It is a surface that combines 2 functions
- To receive inputs for a computer (say, tapping on an app)
- To display the output (launching the app).
Working – It consists of 3 main components
A touch sensor – It has an electrical current going through it and touching the screen causes a voltage or signal changes which are used to determine the location of the touch.
Main technology used in sensors are
- Resistive
- Capacitive
- Surface Acoustic Wave(SAW)
- Infrared LED or Optical
A controller – It takes information’s from the touch sensor and translates it into information the PC can understand.
A software Driver – It allows the touch screen and computers to work together.
Applications – Smartphones, ATM machines, TVs, refrigerators, e-readers, billing systems, and electronic voting machines (EVMs).

Source:

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