How Do Touchscreens Work?

We use touchscreen displays for hours every day, but do you know about all the intricate layers and components that make them work? This episode goes into the structure and basic function of a touchscreen display. What goes into making toughened glass strong, how do capacitive touchscreens work, and how do OLEDs work? The merging of these technologies is what arguably makes the smartphone what it is! Take a look and learn more.

Table of Contents:
00:53 The Layers
01:35 Section 1: Toughened Glass
03:18 Section 2: Capacitive Touchscreen
05:07 Section 3: OLED Display
07:18 Section 4: Summary
07:48 Section 8: Outro

Key Branches from this video are: Multitouch, Electric Fields, Capacitors, OLEDs, LCDs, Material Transparency, Interface Aesthetics

Made by Teddy Tablante

Addendum & Erratum
LG Prada Predated the Iphone. LG Prada was released announced December 12th 2006 and sales started in May 2007.

5:43 Most smartphones use a pentile subpixel layout which is 2x Green for 1x Red and 1x Blue.

7:25 1Pixel = 1G+1B or 1G + 1R. Thus the latest phones are closer to 6.67Million itty bitty lights.

See sub-pixel details here:

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Post with Adobe Premiere Pro and Adobe After Effects
Sound editing with Reaper

Work Cited:
Wikipedia contributors. "Touchscreen." , "OLED."  Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, August 30th, 2018

3M Touch Technology Brief. (2013). “Projected Capacitive Technology” 

Varshneya, A.K., Bihuniak, P.P. (2017). Cover Screens For Personal Electronic Devices: Strengthened Glaass or Sapphire. American Ceramic Society Bulletin Vol. 96, No. 5

Blankenbach Karlheinz. (2014). "Organic Light Emitting diodes (OLED)." Pforzheim University, Germany.

Images of Cellphones acquired from Wikimedia Commons. "HP150" , "Motorola DynaTAC 800x" ,"Appled Newton", "IBM Simon", "Nokia 1610", "Nokia 3310" , "Ipod [1]" , "Blackberry 5810", "Motorola Razr", "IPhone [1]"  Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, August 30th, 2018

Music Attribution in Order:

Morning Dew from YouTube Audio Library

Plaidness from YouTube Audio Library

Water Lillies from YouTube Audio Library

Sunburst, Tobu & Itro is licensed under Creative Commons Attribution License

Car and character models acquired from Blender Market

#Touchscreen #Smartphone #HowDo

[BranchEducation]

I'm wondering whether you all think the content is too in-depth or there are too many details. What are your thoughts?

[tosolini]

I can only imagine the amount of work it takes for you to research, storyboard, model, animate, post-produce these videos. I’m very impressed by the quality of the content and presentation. Thanks for your effort!

[jakkuwolfinsomnia]

The level of ingenuity required for this small device is truly worthy of one of the greatest technological advancements the world has ever known

[harsh.sharma]

No one appreciates the quality content he provided.... efforts put to create this video... That too is a piece of art!

[wuxnd]

Absolutely brilliant video! This was extremely educational & animated perfectly. I'm over here scratching my head as to why schools aren't like this. We could have so many young minds much more fascinated with learning. Keep up the great work Branch Education this is amazing.

[zaynaly]

Damn,

We have taken technology for granted!

Why those brilliant minds behind such tech not highlighted, instead we get to see faces of some good businessmen?

[Mighty.Bishop]

I've always wondered how the touchscreen works. you filled my curious mind with knowledge.

[harbored]

3 years later and exactly what i've been looking for. Took a couple vids but the consistency in quality is staggering and i'm subscribed and ringing the bell! Bravo!

[RicoGalassi]

Touching my screen while watching this video lol hands on learning

It also blows my mind how humans have been able to create so many pixels in such a small display. It's truly incredible

[ZachHixsonTutorials]

Whoa, you nailed this one! Animations and transitions were smooth, and information was organized very well. I always wondered how capacitive touch worked and you explained it perfectly, well done :)

[ПавликГерман]

This is such a high quality content, I'm surprised that here's less than a million subscribers

[thomasreilly]

"Now you too are a touchscreen expert"

[X[ Doubt

[sxbmissive]

“Ugh why do these phones cost so much? What a scam, phones shouldn’t have to cost so much..”

5:46 - and that’s just one aspect of COUNTLESS mind blowing things about smartphones.
You’re literally holding a miracle in your hand. That’s why.

[ELECTRONOOBS]

Content is perfect! I'm here from Learn Engineering. But you have a very high quality channel. Thank you for your work!

[davisdiercks]

I've scoured the internet looking for an in-depth explanation of how touch screens work, and this has by far surpassed them all. INSANE visuals, I am absolutely in love with it. Well done.

[bikeman]

As someone who worked in LCD displays and thin film coating, this is a super explanation.

[mellyhong]

After watching this video, I feel like I don't have the right to rant about the prices of smartphones nowadays.

[jeecodetv]

this is beautiful, although hard to understand. yet i still love exploring this world full of complexities.

[sahand]

Sure, here is a positive comment for the video "How Do Touchscreens Work?":

I really enjoyed this video! It was very informative and easy to understand. I had always wondered how touchscreens worked, but I never really took the time to learn about it. This video explained the science behind touchscreens in a clear and concise way.

I also appreciated the way the video was presented. The visuals were clear and helpful, and the narration was engaging. I learned a lot about touchscreens from this video, and I would definitely recommend it to anyone who is interested in learning more about this technology.

Thanks for making such a great video!

[retinadogames]

Thank you so much for this video. Im a 11 year old boy that is a fan of tech and this video helped me to understand how can my smartphone recognize my touches. Have a Great week!