Building a liquid crystal display (LCD)
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- Опубліковано 29 лис 2013
- I've been exploring technology made possible by having clear, patterned electrodes on glass, and succeeded in making a working (barely) LCD. In this video, I explain types of liquid crystal molecules, and how they can be used to make an efficient display.
- Наука та технологія
Hi Ben,I'm an experienced LCD engineer who is still working in the field. I have to say your work is amazing even from a professional point of view! Here I'd like to remind you that most of materials, like PR, developer, are not good to health. So just be careful when using them. You may need a ventilation system to avoid breathing too much gases. Best regards:)
Jigang Zhao hi, as a professional, do you think i could extract the liquid from a broken lcd pannel?
@Frank Heuvelman wtf are you talking about
@@jus.2ne889 i cannot inform the enemy
Old Master Zhao Jigang, know the enemy.
Hi Ben, how are you? Im also very surprised that it is possible to do the LCD at home. Im texting from Central Asia and now is the summer. There are over 10 millions of people in the city, 3.6 millions are registered here and 6.4 (please correct me if im wrong) are not registered)) air and commodities temperature is over 50 plus. i gonna check now what do crystals need to grow. Have a nice day.
You explained LCDs in a way even dummies like me can understand. THANK YOU1!!!!
Lol
No building however has actually occurred. making this vid clickbait
draggy76: Yes, he built it, but it is a process that spans several episodes.
+draggy76
It is an amazing educational video, and he didn't use the words "Show" or "Tutorial" in the title, so no, its no clickbait. Also, in order to build something, you have to first understand how it works, so I would even go so far and say, yes, this counts as an instructional video. Oh and also: Actually building a macro-size LCD cell, is neither interesting, nor really difficult. If someone doesn't have the mental capacity to do it, after watching this video, instead requiring an audiovisual step-by-step instruction to do it, then someone should not concern himself with how an LCD works, and instead stick to "AMAZING LIFEHACK!!!" - quality videos, aka. "hotglueing junk that breaks after one use - now with dubsteb".
Man, you are one good explainer! And I can picture all the pleasure you had doing the research for this. Way too much fun. Fascinating. Thanks!
When I was a kid I used to take off the top polarizer from calculators and rotate it 180 degrees. It'd give me a white-on-black display instead of the usual black-on-white and I used to feel like a god damn scientist :D
wait, but rotating filter 180 doesn't change polarization?
Turning it over does (at least for some variants).
I see you like flipping stuff around. Why are your comments not flipped?
op oʇ ʇɐɥʍ ǝɯ llǝʇ ʇ,uop
Now go for the name and you're all set :)
Before I saw this video, if someone were to ask me how LCDs worked. I would have answered, "magic." Thank you for the very informative video.
Kevin lol Me too. He's so clear and precise at explaining, everything flows easily.
if the zombie Apocalypse happens someone save him so we can rebuild technology faster
he just made it from commercial products
idiot
you weren't hugged enough as a child, were you?
If a zombie apocolapse ever does happen, by that time, the media would have been so saturated with zombie related content that everybody should know how to protect themselves in case of one
you just gather the zombies and burn them
b34113411 no one said, so new technologies can be made. It was said, so we can REBUILD faster. How many technologies do you have stored in your head ALA Fahrenheit 451 survivor?
You do great work guy. You have the most interesting and in-depth channel I have seen. It is always a pleasure to watch your videos.
What a badass ! Whenever a friend comes near my computer, I tell him "Let me show you something" and then put any of your videos and say "Look at this dude."
Almost all my friends are engineers, as I am, so they appreciate the beauty of it.
Keep up the good work, Ben. You are a frigging inspiration, and I don't use that word !
The funny thing is most of us watched this video about creating primitive LCD displays on our own advanced LCD displays
Irony
Watching on oled display 😂
Extremely thorough and well thought out for a fourteen minute presentation, as well an appreciated ability to speak clearly using proper English to convey/share with the rest of us curious minded tinkerers/ engineers. Keep on keeping on, I subscribed! Thank you!
Great video - thank you very much!
About the rubbing with a cloth: Some years ago there was an article in a german magazine "c't" about how to make custom LCDs.
In the article they recommended to rub the surface with a piece of styrofoam to create the microscratches.
Very nice and clear, yet not dumbed down. I'll be watching! Thanks!
One of the best (if not *the* best) explanation of how LCDs work... This guy never ceases to amaze me.
Fascinating video. I work with LCD displays and there were still quite a few bits of information that were new to me. I especially liked the 'rubbing the plastic' to align the crystal molecules.
I'd be interested to see you manufacture a laser, not an LED one, perhaps a gas or crystal one.
Thanks again.
I hope someone has one for you, I'd love to that that.
*****
what are they used in ? 8KJ xenon flashtube. I have a question. quartz can be liquified yes? and would it act as a light focusing device in the right shape? but more importantly, what are the flash tubes used in?
Bill Kratzer Not a whole lot these days unfortunately. The flash tubes good for ruby lasers are very large and spiral in shape. Many have an outer jacket for water cooling as the heat produced inside a laser cavity is intense enough to cause thermal cracking of even a quartz envelope with even modest pulse rates.
Matt Giordano
but Matt, what type of device is this component used. there are sources out side this country.
oh yea, thanks for the response. but this guy Ben is awsome and I would like to help
Amazing explanation of how LCDs work. Thanks Ben, and good luck with this project. It's proving to be really fascinating.
since he didn't change the way he talks or explains things. videos from 8 years ago feel the same as today. really good
It always amazes me how the manufacturing processes behind these things takes it to a whole new level.
This is so amazing
Just look at an LCD display in your house and think about how much work and cleverness is put into them
The cloth rubbing trick is great. There are loads of weird industrial tricks like that in manufacturing, some times the old way is still the only way.
It reminds me of the technical challenges that were encountered during the development of the SR-71 such as the massive thermal expansion of the fuel tank pieces. We still don't have any polymers or elastomers that will stand up to the temperatures involved.
I was looking for this lecture about a month. Thank you so much for sharing your experiments.
now make a full colored LCD at 1080p resolution
Pff, 4K!
+danscalafani
It's a joke.
Ahmad Zuhdi 8k? I was thinking 20k at least
I was thinking *21k*
in a 5.2 inch form factor
The more videos of yours that I watch, the more I understand, and the more I realize how little I know.
This is the best explanation of how LCD works I've ever seen - thanks! Science is beautiful.
Thank you for taking the time to post this video. I appreciate it.
It's so refreshing here!
I'm a bit tired of all those stupid click-bait thumbnails and those youtubers who are asking us desperately (and too often) to press this damn "Like" button and to not forget to subscribe to their poor channels!
Fortunately! their is still some interesting people on UA-cam who are not only there to monetize us! Like this guy right here...
Wow! I have played around with LCD displays and thought I knew a lot about them... wrong! I thought it was a big deal rotating the polarization film thus inverting the display (dark parts became light and light parts dark). You have a gift. Nice job!
This is so cool omg I was sitting here so confused about how my calculator was showing the numbers and whatnot this was so helpful!!!! Thank you!
Awesome video Ben - simply fascinating!
This may be your best video yet, Ben. The clarity of your explanation puts it above even your electron microscope videos.
Very interesting and informative! I found this video by chance when doing some light research on liquid crystals and really enjoyed it. Thanks!
I really love your videos! Since I've always been interested in everything science related I know the operating principle of almost all the things you try, sometimes even in great detail. But what I often don't know is how things are actually made. And you show that these things can even be made at home, when I thought you'd need a clean room, large machines and perfect computer control.
Btw. not to jinx it, but you're pretty much the only one I know who can get a video with a 1000:0 like/dislike ratio. Says quite alot about you and your subscribers! Thanks alot!
Your explanations are always easy to follow, thanks!
This whole video make me understand how lcd works
Thanks for the video's Ben,
You do a fantastic job explaining your projects.
This was remarkably informative. Thanks for sharing!
Very interesting and great respect for figuring it all out.
That was amazing! Completely explains why LCD screens display colors when you press on them. I almost want to attempt making my own LCD pixel display and make a rudimentary Gameboy or something.
Didn't understand a lot of this, but understood enough to know it's FRIGGIN COOL!
LOL used to say that to my older techie friend too lol ' I dont understand a word u said....but keep talking.....first off its sexy
Your videos are so educational!
It's amazing how far they've gone from game boy days to today's stuff, they're little marvels really.
Much science and engineering that is in something that we nowadays think are so common and even old. Very interesting to hear. Thank you very much.
This is a really nicely done video! Thank you for explaining the concepts so well!
3:51 I enjoy the fact that you say "random again" instead of "turned" 👍😁
I've salvaged the polarized sheets off old LCDs before...now I know why they're there in the first place. And of course all the other layers make sense now too. Thanks.
If my lessons back in school were this interesting, I would have paid more attention in school!
Up until now, I had only a very faint concept about how liquid crystal displays worked, and this presentation helped me understand it much better :)
Such an amazing journey. When you said they were static field crystallized it made me wonder if the layer could be activated in a vacuum by interfering electron beams. I guess one of the polarizers would have to be conductive. A difficult experiment.
I never really understood the physics properly until now - this is a fantastic video!
Awesome. Good description of everything.. Thank you for taking the time to make this.
This is the best channel on UA-cam. Thanks Ben!
Man this makes you appreciate even most primitive mobile displays. I especially love the ridiculous solutions that actually work! Like putting glass beads in between sheets xD
Very interesting! You are one talented and clever individual. Thanks for sharing and keep up the excellent work!
Your work amazes me. Keep these great interesting videos coming.
Thank you for breaking down something that I thought I'd never understand
Excellent in-depth explanation.
Please continue with further tests and study to help improvements.
Crazy. How do people even figure this out? If I tried to make a tv I would have to use a flashlight and some socks.
Careful observation and playing with knowledge (safely). A lot of ideas come from serendipity.
that's the thing, they dint try to make a tv, only a piece of glass/plastic that could switch between opaque and translucent and the the polarizer and liquid crystal stuff already existed.
and the people who invented/discovered polarizers and liquid crystal were also not trying to make a tv.
everything is build up on top of other knowledge that many times doesn't even seems to have any use at the time
You're talking about the famous already invented sock 📺 TV, right?
Technological advance is incremental. For instance, the TV was not made by one person, nor was it made overnight from scratch. First was the discovery of electricity, then came the inventions that made use of electricity, various people contributing all sorts of devices.
Very informative and inspirational. Thank you man.
Excellent presentation. Thank you for presenting this in an easy to understand manner.
that's how I kept cheaters from getting my answer in school. I went in to the calculator, carefully peeled the polariser off, cut it in half and stuck it to my glasses. to everyone else, it looked broke but only I could see my answers.
Everyone who have polarized glasses will see all.
Thanks man. Your channel is phenomenal!
Very interesting. I have always wondered how different technology works. It's very good to be curious about things in our world.
it's inspirational, really, to see someone take on these kinds of challenging projects, not to mention be so damn handy
More fascinating stuff Ben - thanks. :)
@Applied Science
Your level of research is quite amazing. You have the ability to explain in detail all of the projects I have always wanted to accomplish.
Subscribed because I know that your next project is already on my list!
Wow ,your videos are super interesting.
thanks for giving the broad idea about LCD.
That was really interesting and I learnt a lot. I was happy to have guessed at the micro scratches as a solution before you said it so I feel that I did actually grasp the concept. I have been meaning to learn how lcd functions for years and this video was great to learn from thanks! :)
I LOVE THIS SO MUCH!!!!!!!! you are so knowledgeable and educated
Hello. I've been prototyping a DIY PC build with a transparent LCD on the side panel. Tearing down a few old displays and mounting them to the side panel without the back light assembly works very well but the internals of the case look very blurry and foggy.
Several other people have done this and their LCDs don't look foggy like mine. Why is this? I've been researching this and haven't found any definitive answers for which screens will be foggy and which won't.
Some people say older displays have diffusing layers attached to the rear polarizer. Others say the polarizers themselves sometimes have diffusing properties.
If you could provide any insight I'd really appreciate it!
Cheers!
I think they are probably right. I recently repaired the LCD on my motorcycle and it involved removing the polarizers and the reflective layer. The remaining glass was completely see-through and smooth as was the polarizers (other than the polarizing effect). So it may just be a coating to make the screen look better in regular use.
SrgntBallisticGaming Why don't you email one of the non blurry PC guys? I'm sure explaining would tickle their ego. :)
How did it go? 2 years on.
Dude you are on another level....
Neat stuff! Thanks for sharing your hobby with the internets :D
Thanks man! This was fascinating!
Great video. Thanks for sharing this knowledge.
You explained it perfectly 👍👍👍
Very nice explanation!
In the first 1:20 min of the vid you completely shatter in a general way the knowledge of an average student with a BSc in physics in europe. Thank you for making these interesting videos! :)
Came here from Dr. Stone, really interesting how it works. Great video and explanation
Legend says that if you drink a Liquid Crystal then your eyes can see the unseen, and you see amazing things.
This is coolest video in all of UA-cam! I have wanted to understand LCD's at this level ever since my parents replaced my red LED watch with a newfangled LCD watch in the late 1970s. I couldn't wait to take it apart and look inside. I quickly discovered the trick with rotating the two polarizers.
Problem was that most encyclopedia texts on the subject were very cursory. I eventually bought a book titled The Physics of Liquid Crystals. But it did little to explain the subject to the layman. May I ask if you have industrial experience with fabricating LCDs, or did you find the info in the public domain?
Top video the way you explained the set up made it quite easy to understand
The fact that people were smart enough to figure this out is almost hard to grasp.
Awesome video. Keep up the good work!
Thanks for the video. Very informative....
The actual best explanation
Great explanation and very interesting project!
you sir, are both genius and inspirational.
best explanation video i could find... great job and thanks!
Great job on this.
I'd be very interested in how to build a much simpler structure: "privacy film" or "smart glass", where we can make it opaque by applying or removing electricity. The commercial implementations are very expensive and some are slow.
I gained so much knowledge!
Very interesting!! Thanks for sharing!
Amazing video!
very informative and filled in some knowledge holes, many thanks
I so love your work and research you are the man,
Dude where have you been when I completed my graduation. OMG my life would have been way different if I had met you first
Great video! Thanks a lot!
Rubbing the poyimide does not only induce scratches. It actually stretches out some of the polymer chains as well. This helps with the alignment process. I think this is why your glass rubbing was not as effective as you hoped.
An alignment layer can be made by dragging a piece of PTFE across the ITO. You have to press quite hard and it helps if the glass is hot. This process leaves a layer of aligned polymer molecules on the glass surface. It works surprisingly well.
***** When I was doing my PhD back in the early nineties it was a handy way to induce alignment in other polymers when casting from solution. The effect was originally discovered by David Tabor and his co-workers in the early seventies.
David Tabor was a true giant of the scientific world - and all round really nice person. Not enough people know about him. A nice summary of his life and works can be found at: www.smf.phy.cam.ac.uk/files/574FrictFieldBMFRS54.pdf
Wow I understood all this such a good explanation! Keep up good work!
Its amazing how we come up with such things to fix our problems,.. Thanks for your explanation, it was the best i got online :)
This is incredible
Enjoyed the video, very interesting!
You really should be a professor. Awesome video! Thumbs UP!