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!
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
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.
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
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.
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
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
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.
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!!!
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'.
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
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
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...
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.
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 | )
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
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!
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.
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
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?
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 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.
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.
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
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.
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?
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
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.
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 😢
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.
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?)
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?
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.
liquid crystal is not a crystal tak is a liquid, it;s the fourth state of matter, this is sth between liquid and solid, and it;s only calle liquid crysyal. And this was very bad video, if i haven't watched more about irt earlier, i would believe you, thank god i didn't
thank you for uploading this, probably one of the most educational videos ive watched on youtube
We live in a magical world
@Ellis Otis stfu bots.
Surely we are
Finally its clear now. Almost a year took me to get this beautiful lecture. Hatsoff bro.
Great video, very good indeed.
"Any sufficiently advanced technology is indistinguishable from magic."
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!
That's right .
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
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
I see guys, thanks a lot! :)
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.
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
Thank you for this video. I watched other videos but this one finally got me to a point of understanding.
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.
Wow, Where do you know this?
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
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
Thank you my professor couldnt explain the concept.. so beautifully explained
great video mate, great work as always. keep it up
Thank you
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.
Most are actually using oled
Great video! Was searching fpr this and this was the best
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!!!
clear and concise - thank you
Great explanation!
Best explanation
Great video ....Thanks a lot my friend
This is an amazing explanation
I'm glad i can Watch Screen wherever i'd like
I had watched over 20 videos and failed to understand but this one I understood at once
veery well explained, thank you soo much
Where does the colour filter come in? And how does it affect the white light?
Very good explanation!
So if the goal is to make a vertical beam why are the 2 layers are there? I mean the h.p with LC?
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'.
Great explanation, I feel like I get the gist!
wonderful video,Thanks for your sharing
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
I was thinking the same thing.
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
Explained perfectly. 10/10
Does each pixel then have an individual electrode?
So is it why my laptop's battery drains fast when in dark mode ?
well explained.Thank you.
Nice explanation
So well explained ❤ I have a 1080 by 1920 smartphone display
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...
More similar to LED pixel displays than I thought but I had no idea how the liquid crystals played into the situation.
Is that the same for a yamaha keyboard ?
why is necesary horizontal polirizer, liquid cristal and vertical polirizer ?
Thank you so much for this!!!
But how do you get 'transparent electrodes' to a million pixels, how are they each switched to the right value?
Good video...thank you!
good explanation
how the hell did people come up with this genius idea !!!!!
What subject for class will this be or will you consider?
ICT information and communication technology
Well explained
Thank u for sharing...🙏🏽🙏🏽🙏🏽
,,👏👏👏👏👏 great job
Thank you
It makes sense now
So if we remove the glass, what happens?
2:39 Is that done in paint? If so, that's just awesome
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!
Tnx man
thank you
1:50 Wouldn't you only be able to make 3^255, not all the colors possible?
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.
yeah so in a 8 bit channel you get 16,581,375 colours in total
Why can the sub pixels only work with vertically polarized light, why not horizontal light or any other direction of polarized light?
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 | )
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
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!
Years and years of scientific breakthroughs all coming together into singular technologies. That's how most of the things we have today were created
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.
That’s way over my head lol. He was explaining how it works and I still couldn’t understand lol 🤦♂️
I understood perfectly
@@TheBull06 Good for you
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
noice
Awesome profile piture
👍
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?
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.
@@sylvaintreuillet4055 I’m still not understanding please elaborate again. Why do we put light through the horizontal polarizer only to switch it back
@@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.
Why can't you just change the intensity of the backlight to control how much each of those three bands light up?
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.
Archit Bajaj some LED screens are able to do that using “local dimming” but it’s not perfect
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
how about VA and ips
TKQ too.
technology is kinda magical
Sources ?
Can someone explain to me how we are able to manufacture 2 million+ individual pixels that and invisible to the naked human eye?
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.
and me thinking that the the screen was just composed of tiny little RGB LED diodes
Thank you!
I was with you up until .... "hello you tubers"
So why have a horizontal polarizer if u are just going to make it vertical light also awesome vid
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.
@@sylvaintreuillet4055 thank you so much
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
WAIT THATS IT?
THAT WAS LCD?
THAT WAS JUST MAGNETS
watching this on my 3 lcd monitors
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?
😮😮😮👍
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
After Tomorrow I have a test in the same portion
isnt it how led also works except light sourece is led itself
Oh
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.
magic got it
nice video except some mistakes
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 😢
The display doesn't refresh all pixels simultaneously. The pixels are "scanned" one by one, line by line, starting top left, ending bottom right.
I can't get any of nanotechnology. Transistors or lcd screens. I'm an idiot when it comes to understand how they worked.
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.
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?)
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?
I reccomend you go to 5:05 in the video and listen closely.
AKIO TV yes i missed that. So i have to apologize and correct my comment. This is the clearest explanation. Thanks.
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.
Video is amazing but u have to speak a lot faster
No Indians just talk too fast.
rActangle
I call them mini pixels
I like that. Avoids the P right after a B.
liquid crystal is not a crystal tak is a liquid, it;s the fourth state of matter, this is sth between liquid and solid, and it;s only calle liquid crysyal. And this was very bad video, if i haven't watched more about irt earlier, i would believe you, thank god i didn't
😫😫😫stop soo soo sound
Nice explanation
noice