@Ellis Otis stfu bots.

Surely we are

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.

Thank you

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

Most are actually using oled

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

ICT information and communication technology

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

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 | )

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

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 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.

I understood perfectly

@@TheBull06 Good for you

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

The display doesn't refresh all pixels simultaneously. The pixels are "scanned" one by one, line by line, starting top left, ending bottom right.

No Indians just talk too fast.

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.

I like that. Avoids the P right after a B.

Awesome profile piture