How do LCD screens work? (AKIO TV)

  Рет қаралды 151,726

AKIO TV

AKIO TV

Күн бұрын

Пікірлер: 157
@TiholchO
@TiholchO 4 жыл бұрын
thank you for uploading this, probably one of the most educational videos ive watched on youtube
@JoeBetro
@JoeBetro 4 жыл бұрын
We live in a magical world
@gauravnegi4312
@gauravnegi4312 3 жыл бұрын
@Ellis Otis stfu bots.
@fathifajar2425
@fathifajar2425 Жыл бұрын
Surely we are
@Z_kun11
@Z_kun11 15 күн бұрын
no, it's science!
@sumanbabu2380
@sumanbabu2380 3 жыл бұрын
Finally its clear now. Almost a year took me to get this beautiful lecture. Hatsoff bro.
@OriPeel
@OriPeel 5 ай бұрын
you can rarely find teachers like this. awesome video and very clear
@charakiga
@charakiga 2 жыл бұрын
Most of us are watching this video through a LCD screen. He explains something, shows a color as an example, and if you look at the color, well the phenomenon is happening in front of you.
@arshu_parshu1999
@arshu_parshu1999 11 ай бұрын
Most are actually using oled
@swendler9842
@swendler9842 3 жыл бұрын
One correction. The display cannot duplicate all the colors in the universe. They're limited to the gamut defined by their three distinct colors and it NEVER covers the universe of colors. en.m.wikipedia.org/wiki/Gamut
@MegaSunspark
@MegaSunspark 3 ай бұрын
Best and simplest explanation of how LCD monitors work!
@ZooperPlayz
@ZooperPlayz 4 жыл бұрын
So does this mean that there is a higher use of electricity when the pixels are black? Because electricity needs to be passed to the electrodes to position the liquid to not do anything. Great video and explanation!
@joudjoud1947
@joudjoud1947 4 жыл бұрын
That's right .
@andrevinicius137
@andrevinicius137 3 жыл бұрын
Actually not, the polarization of the LCD MOSFETs doesn't need any current flow (just a super tiny amount) to polarize the LCD, the only usage of electricity is to generate the electric field
@hendihart5195
@hendihart5195 3 жыл бұрын
Its yes and a no, a pixel in a screen like amoled work individually so it can turn off without use any electricity, while screen like IPS cant do that
@ZooperPlayz
@ZooperPlayz 3 жыл бұрын
I see guys, thanks a lot! :)
@sylvaintreuillet4055
@sylvaintreuillet4055 3 жыл бұрын
Yes and no. the video talks about normally white panel. , for which your comment is true. but Some are called "normally black". Normally black means in state of no current applied , light will be blocked by default.
@spearchew
@spearchew 3 жыл бұрын
Great video, very good indeed. "Any sufficiently advanced technology is indistinguishable from magic."
@wokest6588
@wokest6588 8 жыл бұрын
great video mate, great work as always. keep it up
@AKIOTV
@AKIOTV 8 жыл бұрын
Thank you
@PeterPete
@PeterPete Жыл бұрын
It's the intensity of the white light behind the RGB filter that gives you the different values of colour and creates all the colours you see on a screen. White and black are not colours so one cannot make true white or true black with RGB.
@fathifajar2425
@fathifajar2425 Жыл бұрын
Wow, Where do you know this?
@mr.pasuli3291
@mr.pasuli3291 Жыл бұрын
well combining the 3 colors at the same light power creates white and shutting them all with no light creates black so no problem.the intensity like the video said is created by how much light the liquid crystal lets pass through
@PeterPete
@PeterPete Жыл бұрын
yes, how much white light is allowed to pass through the liquid crystals onto the RGB filters. It is wrong to state that RGB make white light when it is in fact white light 'washing out' or 'over exposing' any rgb filter. White light always underpins any coloured light 👍 @@mr.pasuli3291
@serhattuluk7970
@serhattuluk7970 2 жыл бұрын
Thank you my professor couldnt explain the concept.. so beautifully explained
@thnknoutloud
@thnknoutloud Жыл бұрын
Thank you for this video. I watched other videos but this one finally got me to a point of understanding.
@fathifajar2425
@fathifajar2425 Жыл бұрын
I'm glad i can Watch Screen wherever i'd like
@Reece_Hayes
@Reece_Hayes 5 жыл бұрын
1:50 Wouldn't you only be able to make 3^255, not all the colors possible?
@AKIOTV
@AKIOTV 5 жыл бұрын
with 8 bits per channel you get 256^3 possible colors. (not 255 because 0 is also a possible value.) I may have said something like "with these three colors you can create all others", which was just to illustrate the concept of rgb. Indeed the actual amount of possible colors depends on the amount of bits per channel.
@skmuchina
@skmuchina 3 жыл бұрын
yeah so in a 8 bit channel you get 16,581,375 colours in total
@akampuliraalex7731
@akampuliraalex7731 Жыл бұрын
I had watched over 20 videos and failed to understand but this one I understood at once
@sagniksaha4179
@sagniksaha4179 2 жыл бұрын
If ultimately the l-crystal is converting a horizontal polarized light into vertical polarized light then why not remove the horizontal polarizar at first which will directly allow the passage of vertical polarize light
@dailymotivation06732
@dailymotivation06732 8 ай бұрын
I guess its because you need to turn the sub-pixel off when you dont need it. If you only have the vertical polarizer it will stay turned on all the time
@gabrielatorresvalerio2442
@gabrielatorresvalerio2442 10 ай бұрын
thanks so much, blessings!!! I think u alredy said this in your youtube description so I was just gonna say that it's a good idea to make videos more dinamic so that things that change positions and all of that can be understood a little bit better, but still, it was good!!!
@dynamicchuff609
@dynamicchuff609 4 жыл бұрын
So is it why my laptop's battery drains fast when in dark mode ?
@virtual-adam
@virtual-adam Жыл бұрын
Great explanation, got to love the 'Act kind of like prisms, not really, but kind of like prisms'. Don't think that will cut it in the real world... You lend me your car and I'll give it back, I wont ever really, but I'll give it back soon'.
@aliahmed5874
@aliahmed5874 4 жыл бұрын
So if the goal is to make a vertical beam why are the 2 layers are there? I mean the h.p with LC?
@imsohi48
@imsohi48 11 ай бұрын
But how do you get 'transparent electrodes' to a million pixels, how are they each switched to the right value?
@BRNOOB_
@BRNOOB_ 3 жыл бұрын
Great video! Was searching fpr this and this was the best
@MiScusi69
@MiScusi69 2 жыл бұрын
Fun fact: if you stare at your screen at 2:12 for a while and then look at a white surface, you're going to get the Irish flag!
@bajaj607
@bajaj607 6 жыл бұрын
Why can't you just change the intensity of the backlight to control how much each of those three bands light up?
@AKIOTV
@AKIOTV 6 жыл бұрын
If you change the intensity of the backlight, you're changing the brightness of the entire screen. The backlight is one big light that stretches over the whole thing.
@ryanringer3896
@ryanringer3896 4 жыл бұрын
Archit Bajaj some LED screens are able to do that using “local dimming” but it’s not perfect
@kurdistanindependance5471
@kurdistanindependance5471 3 жыл бұрын
There are like 2 types of backlighting: full array and edge lit. Full array has a lot more led backlights that can perform local dimming a lot better. Edge lit has leds on the edges and can turn off sections of its backlights but it doesnt have nearly enough lights as full array so local dimming will be crappy… will dim huge parts of the visible screen instead of the smaller more precise sections dimmed in full array. Obv ones more expensive
@INGIE32
@INGIE32 Жыл бұрын
2:39 Is that done in paint? If so, that's just awesome
@elsadoyle4592
@elsadoyle4592 2 жыл бұрын
Where does the colour filter come in? And how does it affect the white light?
@YFTOUCH
@YFTOUCH Жыл бұрын
wonderful video,Thanks for your sharing
@lifegamero
@lifegamero 2 жыл бұрын
why is necesary horizontal polirizer, liquid cristal and vertical polirizer ?
@DIOBrando-ur5we
@DIOBrando-ur5we 3 жыл бұрын
How did people even figure out that using an electron gun inside a vacuum while amplifying the voltage to change colours and magnets to control the direction of the electrons would end up in a television. And thats just CRT. How the hell did LCD become a thing? How did people figure out these things? The human race truly is more intelligent than we give ourselves credit for
@brettt67
@brettt67 3 жыл бұрын
They figured out the Liquid crystals back in the late 1800's and found they could rotate the polarization of light using cholesteryl benzoate. They started using it in the late 60's for display but it required hundreds or thousands of volts, so it was impractical. As technology advanced, so did the concept and we now have amazing LCD's!
@mannb1023
@mannb1023 2 жыл бұрын
Years and years of scientific breakthroughs all coming together into singular technologies. That's how most of the things we have today were created
@omniyambot9876
@omniyambot9876 2 жыл бұрын
Thousands of scientists who goes unnoticed. Spending and dedicating entire life into experiments and studies. Then transfering knowledge to other nerds.. it's just amazing.
@baseerehsan
@baseerehsan 8 ай бұрын
So well explained ❤ I have a 1080 by 1920 smartphone display
@andrewgreen1970
@andrewgreen1970 18 күн бұрын
Should have also mentioned how a device sweeps through memory and uses a clock to sweep through the screen to project a voltage level for every sub-pixel. But otherwise a really good video.
@mohammedviso2269
@mohammedviso2269 6 жыл бұрын
Great video ....Thanks a lot my friend
@vishvish5852
@vishvish5852 3 жыл бұрын
This is an amazing explanation
@wayneuzzi
@wayneuzzi 4 жыл бұрын
What subject for class will this be or will you consider?
@singlemingle6411
@singlemingle6411 3 жыл бұрын
ICT information and communication technology
@pranav_chandar_jazz
@pranav_chandar_jazz 4 жыл бұрын
how the hell did people come up with this genius idea !!!!!
@JayThaKingx
@JayThaKingx Жыл бұрын
i want to understand how to figure stuff out like this vs gaining knowledge about it. I want to know the foundation of how all of this works and have no idea where to begin
@Jobsmines
@Jobsmines 3 жыл бұрын
So if we remove the glass, what happens?
@zero_cool02
@zero_cool02 3 ай бұрын
good video and demonstration , thanks
@shmulikgoldstein4557
@shmulikgoldstein4557 3 жыл бұрын
Very good explanation!
@ThePyroraptor33
@ThePyroraptor33 3 жыл бұрын
Great explanation, I feel like I get the gist!
@Aragubas
@Aragubas 4 жыл бұрын
veery well explained, thank you soo much
@MoneylessWorld
@MoneylessWorld 3 жыл бұрын
Does each pixel then have an individual electrode?
@vimlam6027
@vimlam6027 3 жыл бұрын
But why do we only use the light which is horizontally polarised,i.e, why do we block the vertically polarised light by a horizontal polariser in the first step?
@sylvaintreuillet4055
@sylvaintreuillet4055 3 жыл бұрын
that's because unpolarized light will go through the crystal and then pass trough the second polarizor , you can never have black color is this situation.
@3018handle
@3018handle 2 жыл бұрын
@@sylvaintreuillet4055 I’m still not understanding please elaborate again. Why do we put light through the horizontal polarizer only to switch it back
@gyroninjamodder
@gyroninjamodder 2 жыл бұрын
@@3018handle because an ideal horizontal polarizer + vertical polarizer = no light. Then if we add a liquid crystal in between we can now rotate the light so that light can start getting through again. If there were no polarizers the backlight would always just shine through. The screen would be white because there's nothing to stop the light from passing through.
@GameeIN
@GameeIN Ай бұрын
if i knw that those sub pixels can help me to optimize coulours this mutch i would learn this 10y ago....This was a random click and luckly you start talking about that...I newer actualy tuch that part of calibrating,left defoult becose i try 1 time for the moment like move red bar down and its look awfull..Ty man now i see that this is wery important to knw and easy fix for your colours...I think it can hdr make better ?
@Josh23761
@Josh23761 3 жыл бұрын
More similar to LED pixel displays than I thought but I had no idea how the liquid crystals played into the situation.
@Dhirendrakumar-mg8bs
@Dhirendrakumar-mg8bs 6 жыл бұрын
Nice explanation man... I have a daubt where is the circuit board like the motherboard...and how a complete particular image is formed.... Suppose i want my photo to be displayed on to the screen...in this case how my image will be loaded onto the screen..i mean how it will be displayed...
@DylanHulme-gl5db
@DylanHulme-gl5db Жыл бұрын
Is that the same for a yamaha keyboard ?
@ryan.fathh16
@ryan.fathh16 3 ай бұрын
yes. Hard to believe that i can found this video to understand lcd's works
@W0954
@W0954 3 жыл бұрын
5:49 -> Wait.... What ?! lol.... And how each pixel is programmed ? What kind of computer code/language is used ? How it's all coded in radio waves and decoded to digital and translated ? How it's builded in a factory ? Where the liquid crystal are extracted ? So many questions.... I might start to have a panic attack by not accepting my extremely finite form of life incapaple of learning everything that I want ....LOL
@AJD...
@AJD... 3 жыл бұрын
1. An 8-bit display CAN NOT show every color in the universe. Why do you think we have 10-bit displays? and even then there will be gaps. The number of possible colors in the universe.. at least mathematically.. is infinite. 2. You didn't explain why we have to first use the horizontal polarizer if we're only going to convert horizontal rays to vertical before letting them pass?
@siavashnoorb9604
@siavashnoorb9604 4 жыл бұрын
Great explanation!
@jordie9274
@jordie9274 5 жыл бұрын
Why can the sub pixels only work with vertically polarized light, why not horizontal light or any other direction of polarized light?
@AKIOTV
@AKIOTV 5 жыл бұрын
Liquid crystals can "turn" the polarisation 90 degrees, so horizontal/vertical are relative terms. If you were in space, horizontal and vertical wouldn't even exist, as they are defined by (you guessed it) the horizon. In fact, if you turn your monitor on its side, the horizontal polariser before the liquid crystals is now actually a vertical polariser, and the vertical polariser at the end is now actually a horizontal polariser. So yes, you could do this with horizontally polarised light as well, and in fact with any orientation, so long as you line up the filters correctly; For example: if your first filter is a horizontal polariser tilted 45 degrees (making it a uhm I guess a "diagonal polariser") then of course the second polariser should be a "vertical polariser" tilted at 45 degrees too. (the first one would be \ and the second one /, instead of the first one being - and the second one | )
@jonathanvashchenko8216
@jonathanvashchenko8216 5 жыл бұрын
That’s way over my head lol. He was explaining how it works and I still couldn’t understand lol 🤦‍♂️
@TheBull06
@TheBull06 4 жыл бұрын
I understood perfectly
@gtorr47
@gtorr47 3 жыл бұрын
@@TheBull06 Good for you
@robblequoffle8456
@robblequoffle8456 18 күн бұрын
I mean, technically speaking, the only way to create any color is by using pure wavelengths, since those have the highest saturation. You couldn't actually create EVERY color.
@viplavdevoteeofshriram2520
@viplavdevoteeofshriram2520 7 жыл бұрын
Best explanation
@trainwrexk
@trainwrexk Жыл бұрын
Thank you so much for this!!!
@fcrick6967
@fcrick6967 3 жыл бұрын
clear and concise - thank you
@GirishKumar-cd2lm
@GirishKumar-cd2lm 2 жыл бұрын
Thank u for sharing...🙏🏽🙏🏽🙏🏽
@shivikasingh8360
@shivikasingh8360 7 жыл бұрын
Nice explanation
@opfax163
@opfax163 10 ай бұрын
and me thinking that the the screen was just composed of tiny little RGB LED diodes
@parhammehrparvar8265
@parhammehrparvar8265 2 жыл бұрын
technology is kinda magical
@micah2936
@micah2936 Жыл бұрын
So worst case let’s say we have 921,600 total pixels. We have a cathode and anode for each filter color, so we have 921,600 pixels X 3 filters = 2764800 filters. Each filter needs a cathode and an anode. So you need 2764800 outputs pins to control each pixel and you need 2764800 cathodes going into ground? This part does not make sense to me. If you have an 8bit shift register array, you would need 345,600 shift registers to control each individual matrix. If you do a matrix where each row and column has its own wire with a common cathode, then you still need 6,000 outputs with 1280 columns and 720 rows with 3 filter colors? In this case, you will still need 750 8bit shift registers for that many outputs. My question is how are all the pixels controlled in unison with 60 frames per second or faster refresh rated? I can’t find any freaken videos that explains 😢
@AKIOTV
@AKIOTV Жыл бұрын
The display doesn't refresh all pixels simultaneously. The pixels are "scanned" one by one, line by line, starting top left, ending bottom right.
@sangarp2001
@sangarp2001 2 жыл бұрын
well explained.Thank you.
@justimagine2403
@justimagine2403 Жыл бұрын
Not quite. It doesn't do UV or blacklight. And I can see that. It doesn't make Uranium Glass glow when turned to Ultra Violet.
@colehopper8470
@colehopper8470 4 жыл бұрын
Can someone explain to me how we are able to manufacture 2 million+ individual pixels that and invisible to the naked human eye?
@kalpeshdangar2590
@kalpeshdangar2590 3 ай бұрын
How to mack a liquid crystal.?
@creativecreepyturtle
@creativecreepyturtle Жыл бұрын
WAIT THATS IT? THAT WAS LCD? THAT WAS JUST MAGNETS
@sirrichardrichard5655
@sirrichardrichard5655 4 жыл бұрын
I was with you up until .... "hello you tubers"
@mdyusufansari8897
@mdyusufansari8897 Жыл бұрын
how about VA and ips
@mirandamanriquez1947
@mirandamanriquez1947 2 жыл бұрын
It makes sense now
@dylanfarr4834
@dylanfarr4834 3 жыл бұрын
So why have a horizontal polarizer if u are just going to make it vertical light also awesome vid
@sylvaintreuillet4055
@sylvaintreuillet4055 3 жыл бұрын
Liquid cristal don't act as a polarizer , solely as a programmable light rotation system. You still need first polarizer to polarize the light at the beginning of the systems so you can choose whether to block it or not at the second one. If you remove the first polarizer , you 'll then have unpolarized light that can pass trough the second polarizer (intensity 'll be divided by 2). By the way the video describe a normally white panel , meaning in the "no current mode" , light can go trough , it can be a cost saver if you display mostly bright picture (you don't have to apply current to the electrodes). But the vast majority of panel are "normally black" , meaning you have to apply current to let light goes through.
@dylanfarr4834
@dylanfarr4834 3 жыл бұрын
@@sylvaintreuillet4055 thank you so much
@susanclark6987
@susanclark6987 4 жыл бұрын
Good video...thank you!
@Yeeeeeehaw
@Yeeeeeehaw 5 жыл бұрын
good explanation
@Wisetechwiz
@Wisetechwiz Жыл бұрын
Well explained
@martindelgado3425
@martindelgado3425 4 жыл бұрын
Sources ?
@veervg6066
@veervg6066 4 жыл бұрын
ok i get it now.. i get it that im DUMB.. you explain well mate but my brain was like..wtf?.. Guess i would have to watch the video again
@ycdcherokee
@ycdcherokee 7 жыл бұрын
i understand there are only two possible values for a subpixel, 0 and 255. and it makes 6 different colors on the screen. how can the shades of colors be made? so this is not a good explanation.
@AKIOTV
@AKIOTV 7 жыл бұрын
I did actually explain this although you've probably missed it so here you go: the max value is 255 and the miniumum value is 0. So each subpixel has 256 possible values. This means the amount of colours that can be created is 16.7 million. (if there would be only 2 possible levels why would we use 0 and 255 rather than 0 and 1?)
@ycdcherokee
@ycdcherokee 7 жыл бұрын
i mean, if light passes through the liquid crystal, the value is 255 and if it doesn't, the value is 0. So, what about the value 100? what makes subpixel more shiny or less shiny? is it voltage or any other factor makes the difference?
@AKIOTV
@AKIOTV 7 жыл бұрын
I reccomend you go to 5:05 in the video and listen closely.
@ycdcherokee
@ycdcherokee 7 жыл бұрын
AKIO TV yes i missed that. So i have to apologize and correct my comment. This is the clearest explanation. Thanks.
@AKIOTV
@AKIOTV 7 жыл бұрын
Well I do think that in the drawing that is on the screen during that time, I should have put it in somehow, because now it's quite easy to miss since it's only in the voice over.
@fatihkan2601
@fatihkan2601 5 жыл бұрын
I can't get any of nanotechnology. Transistors or lcd screens. I'm an idiot when it comes to understand how they worked.
@tvman9720
@tvman9720 2 жыл бұрын
watching this on my 3 lcd monitors
@shubhammaurya3671
@shubhammaurya3671 3 жыл бұрын
isnt it how led also works except light sourece is led itself
@Richardk-ps7tj
@Richardk-ps7tj 9 ай бұрын
Very lacking in detail but good enough for someone who doesn't have much knowledge in physics. I also don't like how you said that every colour in the universe can be reproduced with these, which is outright misinformation.
@gamergnomegardens3538
@gamergnomegardens3538 5 жыл бұрын
noice
@chadsunderland3881
@chadsunderland3881 3 жыл бұрын
Awesome profile piture
@pramodkumarsharma1851
@pramodkumarsharma1851 5 жыл бұрын
,,👏👏👏👏👏 great job
@hadisergan1
@hadisergan1 4 жыл бұрын
thank you
@robblequoffle8456
@robblequoffle8456 18 күн бұрын
"wracktangle"
@asta0205
@asta0205 3 жыл бұрын
After Tomorrow I have a test in the same portion
@riader
@riader 4 жыл бұрын
nice video except some mistakes
@vivopencil7675
@vivopencil7675 4 жыл бұрын
Video is amazing but u have to speak a lot faster
@1ExTERMINATE1
@1ExTERMINATE1 3 жыл бұрын
No Indians just talk too fast.
@haroldhartsock2120
@haroldhartsock2120 5 ай бұрын
Well, my gosh, that was so easy I am embarrassed.
@Vidya1939
@Vidya1939 6 жыл бұрын
TKQ too.
@fearless_chrollo8213
@fearless_chrollo8213 5 жыл бұрын
Thank you!
@tylerjacome6384
@tylerjacome6384 2 жыл бұрын
magic got it
@myth6627
@myth6627 5 жыл бұрын
Tnx man
@propower4717
@propower4717 Ай бұрын
Wow
@chadsunderland3881
@chadsunderland3881 3 жыл бұрын
I call them mini pixels
@AKIOTV
@AKIOTV 3 жыл бұрын
I like that. Avoids the P right after a B.
@jayden4591
@jayden4591 4 жыл бұрын
Oh
@arvindersingh1376
@arvindersingh1376 5 жыл бұрын
👍
@zombielrama1301
@zombielrama1301 4 жыл бұрын
😮😮😮👍
@gasonmansion
@gasonmansion 5 жыл бұрын
rActangle
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