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Q.

How does touch screens work?

Tags: money, relationships, entertainment
Asked by narendra sharma, 28 Feb '13 12:23 pm
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Answers (5)

 
1.

When you touch the icon on the screen a grid under the screen caculates where you touched and what program is there.To allow people to use touch commands that require multiple fingers, the iPhone uses a new arrangement of existing technology. Its touch-sensitive screen includes a layer ofcapacitive material, just like many other touch-screens. However, the iPhone's capacitors are arranged according to a coordinate system. Its circuitry can sense changes at each point along the grid. In other words, every point on the grid generates its own signal when touched and relays that signal to the iPhone's processor. This allows the phone to determine the location and movement of simultaneous touches in multiple locations. Because of its reliance on this capacitive material, the iPhone works only if you touch it with your fingertip -- it won't work if you use a stylus or wear non-conductive gloves.
Answered by Quest, 28 Feb '13 12:35 pm

 
  
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2.

I have seen this function with mobiles but no idea about what happens inside ?
Answered by Leo, 09 Nov '13 08:22 am

 
  
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3.

It depends on the device and the type of touchscreen youre using. There are two different kinds used in most consumer electronics:

Resistive touchscreens - which are used on some Samsung, HTC and LG phones, and are typical of ATMs, supermarket checkout stations and the electronic signature doodad the UPS guy carries - have a glass panel thats covered with conductive and resistive metallic layers. These two layers are held apart by spacers, and an electrical current runs through them when the screen is operational. When a user touches the screen, the two layers make contact in that spot. The change in the electrical field is noted and the device coordinates the point of contact so a device driver can translate user touches and movements into something that the OS can understand.

Capacitive touchscreens - used on the iPhone, Droid Eris and Blackberry Storm, among other smartphones - have a glass screen covered by a transparent conductor layer that stores an electrical charge. When ...more
Source: google search
Answered by anil garg, 02 Mar '13 12:15 am

 
  
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4.

When you touch the icon on the screen a grid under the screen caculates where you touched and what program is there.To allow people to use touch commands that require multiple fingers, the iPhone uses a new arrangement of existing technology. Its touch-sensitive screen includes a layer ofcapacitive material, just like many other touch-screens. However, the iPhone's capacitors are arranged according to a coordinate system. Its circuitry can sense changes at each point along the grid. In other words, every point on the grid generates its own signal when touched and relays that signal to the iPhone's processor. This allows the phone to determine the location and movement of simultaneous touches in multiple locations. Because of its reliance on this capacitive material, the iPhone works only if you touch it with your fingertip -- it won't work if you use a stylus or wear non-conductive gloves.
Answered by iqbal seth, 01 Mar '13 05:28 am

 
  
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5.

When you touch the icon on the screen a grid under the screen caculates where you touched and what program is there.To allow people to use touch commands that require multiple fingers, the iPhone uses a new arrangement of existing technology. Its touch-sensitive screen includes a layer ofcapacitive material, just like many other touch-screens. However, the iPhone's capacitors are arranged according to a coordinate system. Its circuitry can sense changes at each point along the grid. In other words, every point on the grid generates its own signal when touched and relays that signal to the iPhone's processor. This allows the phone to determine the location and movement of simultaneous touches in multiple locations. Because of its reliance on this capacitive material, the iPhone works only if you touch it with your fingertip -- it won't work if you use a stylus or wear non-conductive gloves.
The iPhone's screen detects touch through one of two methods: Mutual capacitance or self capacit ...more
Answered by Ataur Rahman, 28 Feb '13 12:24 pm

 
  
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