How Does Touchscreen Work? | BRITLAB

Greg Foot takes a look at what is happening in your handset when he answers the community submitted question of 'How do Touchscreens work?

[TheHuesSciTech]

I love how you just read out three questions at the start and didn't answer them!

[ChompNom]

This series is the only reason why I'm still subscribed to headsqueeze

[TheBlizzardMuffin]

Is James May no longer doing videos on this channel?

[SenpaiTorpidDOW]

Why do we get nervous?

Because getting nervous has evolutionary utility. We get nervous when we have to do something we dislike doing. There's a reason we don't like doing everything. Either it brings us pain and therefore can damage us physically, or it brings us which all damage our reputation. Assuming everything else is equal the person with the better reputation and who experiences few things which cause pain has better survival/reproductive prospects than those who have poor reputation and who experience lots of things which cause pain. 

This dawned on your body overtime so at some point it started doing whatever it does to make you feel uneasy about being in situations which may lead to humiliation/pain so that you avoid them. Of course sometimes it is best to deal with the nervousness and not run away, but nervousness does, for the most part, protect you from doing things that really aren't beneficial - like trying to satisfy your curiosity with regards to how it feels to shoot yourself with a gun, or the curiosity with regards to seeing how others react if you get up and run around in a circle screaming on a bus. 

[tommyxboy]

Symbols on the "potassium bath" are backwards, or the arrows at least

[harrypotter]

I am still a bit confuse.
First is for the capacitive touch screen. It uses 3 layers that the LCD and Protecting Glass are separated by Capacitive Layer. How could the LCD is still visible while it is covered by the Capacitive Layer?

Second is for the resistive touch screen. Where do you put the LCD? if it is also separated with the top layer by the middle layer, how could the LCD is still visible, too?

By the way, thank you for upgrading my knowledge :)

[xmerxmer]

*WRONG!* Capacitive touchscreen was introduced by LG with model Prada, released a full year before the iphone. So once again, just replicating, not innovating.

[alkss]

would a touchscreen work with a dead finger?

[Kanglar]

3:07
In a capacitive touch screen no charge actually moves between the phone and your finger (i.e. there is no current going into or out of your body). The charge in the phone simply induces an opposite charge in your finger, and your finger and the driving lines become a capacitor. Good info tho, just wanted to clarify that part.

[HeylonNHP]

My LG F3 has a capacitive touch screen. The glass on the front is wonderful, I have not gotten a single scratch on it since I got the phone, and its been through a lot. All of my other devices with screens have managed to catch a few scratches in the past, but not this phone.

[AGUYMON]

How dose contactles charging your phone work. There are phones that don't have to be physically plugged in they just half to sit on some kind of pad.

[ratanbharadwaj]

if there are conducting lines crossing the screen. then how can i see the screen?
please tell me if you know
thanks in advance

[IA]

This is probably the best explanation of touch screen I've seen...

[ManosTheOne]

I've heard that there is another type of touchscreen which is based on something like an optic field and when you place your finger on it you disrupt it and camera like sensors can tell the position of the disruption.

[PunkSceneEmoSkater]

not that this channel isn't good because i enjoy it, but most of the questions asked at the beginning are answered by Michael Stevens on VSauce, another great channel

[haithamar]

it was an interesting lecture about touch screens, simply explained and straight forward.
I wonder if you can make an explanation about wifi frequency, how does it hold and transfer data, and how does the receptors on the terminals receive that data ..
thanx in advance

[jas]

Great vid.... If you get a. iPhone 3G In at sun at the right angle these lines can be seen. Fascinating!

[AristotelisMitsiou]

this is what we need! not: what happens if the internet blows up and other future stuff!

I've got a question here. My Galaxy S4 has a option called " Touch Sensitivity ". When  I check it I can use my smartphone with gloves? How does that work? Based on what you said you can not use gloves to control a smartphone.

[NorwegianCrazyGuy]

Could you guys make a video about the first touch screen at CERN and the making of it? Never heard about it before. Love your show, would like to se more of Captain Slow.