8/17/2019 speech about touchscreen

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.Good morning everyone.Thanks for coming in such big number.I’m Robu Marcelin

and This morning I’m going to be talking to you about touchscreen technology.Feel

free to interrupt me if you have any questions about hat I’m going to talk about.

!o many of you still use an old mobile phone ith more than " buttons# $ecause a

recent study shoed that only %& of mobile phones are not using touch screentechnology.

'o( hat is a touchscreen#

) touch screen is an electronic visual display that locates the coordinates of a user’s

touch ithin the display and it orks independentlyof hat is being displayed on

the screen.

It as developed by *.). +ohnson in ,-/ but the technology can be traced back in

,-"0 in music industry.1ther important steps for the evolution of touchscreen ere2

3,--% )pple’s 4eton

35665 Microsoft’s 7indos 89 tablet

3566: )pple’s iphone

;o you remember the old touchscreen phones#!o hard it as to touch

something and launch it#That as because the old phones used resistive

touchscreen techonoly but I’m going to provide more information about the types of 

touchscreen.

 The resistive one2contains to layer of conductive materials.The touch creates

contact beteen resistive layers completing the circuit.The voltage in circuit

changes based on position and a controller determines the location based on

voltage.This can be activated by any ob<ect(it is accurate and cheap but it has a

loer endurance=%/ million touches> and can’t support multiple touches.

It’s used in old touchscreen phones and gaming consoles=4intendo ds>

 The capacitive one.?ou need @ngers for this.It’s made ith a glass panel ith a

conductive layer.) small amount if voltage is applied to four corners of display.The

touch dras minute amount of current creating a voltage drop detectable by the

controller hich calculates the coordinates of point of contact.

ItAs very accurate( durable( high endurance but (as I said( you need to use a

conductive ob<ect to activate this=@ngers or stylus> and supports multiple touches

It’s used in modern smartphones( tablets all in one pc etc.

 The ')7 one.The surface consists of glass overlay ith transmitting and receiving

sensors.*lectric signals sent to the transmitting transducers converts to ultrasonic

8/17/2019 speech about touchscreen

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aves hich are directed across the screen.7hen the @nger touches it absorbs

aves and the received values are compared to stored digital maps to calculate the

coordinates.It has the best optical quality( supports mutli3touch but it is eBpensive.

It’s used forC.

 The optical one.Dses infra E*;s and matching photodetectors.Touching screen

intrerupts E*;s and the cameras detect the reected E*;.The controller calculate

the coordinates from camera data.It is durable(supports multi3touch but it’s

eBpensive.

Eet’s have a look at this graph.!ere e can see the shipment of touch panels from

566: to 56,/.i’d like us to look at the years 566: and 5660.?ou can see the increase

beteen these years#it’s because in 566: apple’s iphone as launched and the

companies orldide implemented this technology into their devices.7e could say

that the iphone launch as like a ramp hich led to this rise of touchscreen panels.

 The touchscreen technology is used on a variety of devices2all in one 9(tablets(pda

and the biggest category2smartphones and many more.

I need anend