Internal structure of a liquid crystal or LCD TV screen

  Рет қаралды 102,339

e-learning électronique

e-learning électronique

2 жыл бұрын

In this episode the internal architecture of a liquid crystal display found in LCD TVs is discussed. The design of this type of screen requires an assembly of different parts such as polarizing filters, liquid crystal, electronic circuits and color filter.

Пікірлер: 69
@kentslocum
@kentslocum Жыл бұрын
The thing that blows my mind is that the circuitry to control each pixel is placed behind the liquid crystal, yet is transparent enough to let the light through. How can they print circuits that small? Seems like magic to me.
@michelangelo604
@michelangelo604 Жыл бұрын
lithography like how they make cpu waifers i believe is used to make the transistors amazing indeed
@FYMFTP
@FYMFTP Жыл бұрын
Fantastic video. I learned a ton! I had no idea that's how an LCD worked. Thank you for sharing.
@AnsariElectronics430
@AnsariElectronics430 2 жыл бұрын
Great video. Always learn something new from your videos thanks for your effort. God bless you
@nbursese
@nbursese 2 жыл бұрын
Amazing video. Thank you very much for this information.
@MarineElectrical
@MarineElectrical Жыл бұрын
I have no words how much I would like to thank you!
@mrvloga
@mrvloga Жыл бұрын
Thanks for best description about led tv internals structure
@chamanlaldewangan6591
@chamanlaldewangan6591 11 ай бұрын
Your video, animation and explanations are awesome.
@nativetravellerdeepak9562
@nativetravellerdeepak9562 2 жыл бұрын
इस वीडियो के माध्यम से मार्गदर्शन करने के लिए धन्यवाद बड़े भाई
@Valdaemonium
@Valdaemonium Жыл бұрын
This is the best explanation about the technology itself in Liquid Crystal Displays. Hope there's another one to talk about several changes which improved this technology to almost match with OLED types: The gain of contrast ratio; others LC types, as VA and LTPS; the FALD in miniLED for backlight etc. A question I have for Color filter on this screen, is: how do they get the acurate RGB pixel to show pure colors nowadays? Since oldest LCDs were so wayoff, in exhibiting blend colors, and now we have deepest reds/greens/blues we never saw before? If it is just the Quantum Dots layer, or if color filters are made with deep/solid RGB pixel? ...
@alannemeth3293
@alannemeth3293 Жыл бұрын
Wow I never dreamed it looked like that, thanks.
@abcabdi8523
@abcabdi8523 Жыл бұрын
Wow! interesting & Very well Expressed.
@saa6969
@saa6969 2 жыл бұрын
Thank you very much. I hope to get more beautiful videos
@sabasri1881
@sabasri1881 Жыл бұрын
Sir Vere Vere supper sir. iam 📺 Work very very useful sir. Naxt video waiting
@kiergo6679
@kiergo6679 Жыл бұрын
Woah, great video mate!
@Breilan517
@Breilan517 2 жыл бұрын
Exelentes videos pero serían buenos también en español
@noreezy4991
@noreezy4991 9 ай бұрын
not everyone understands the point of the capacitive structure. the point is that the E-field in the (idealized) infinite flat plane capactior that is created by this structure induces torques on the nematic liquid crystal aggregates (through the capacitor's electric field interacting with the dipole of the molecules, in the most simplistic basic idealized approximation obviously, everything "neat and nice and clean" and capable of being modeled with 1st year university calculus, lol). In practice, the important control input is the switching of the capacitors. A tremendously critical part of LCD development has been the capacitor "cell" optimization, and less about things like the light source (which is almot 100% of the focus in OLED research)
@globalteamwork4light
@globalteamwork4light 6 ай бұрын
lcds are incredibly advanced tech compared to oleds, if i have got it right. the old analogue crt tvs were a fantastic ingeneering accomplishment as well.
@thedistinguished5255
@thedistinguished5255 3 ай бұрын
if theres a vertical and a horizontal polarizing filter, what else passes through that makes the screen not black? if they block everything?
@nagiaachou3618
@nagiaachou3618 9 күн бұрын
same question
@Valdaemonium
@Valdaemonium Жыл бұрын
Why some LCD screen comes with a poor red and green pigmented resine, causing the display to show colors in a strong blueish tint? Poco x4 gt's LCD shows deep red and green, but most LCD (like on the moto g8 power's LCD) reds are orangeish and greens are so off...🤔
@GurvinderSingh-zc3je
@GurvinderSingh-zc3je Жыл бұрын
Very hard excellent explain
@YFTOUCH
@YFTOUCH Жыл бұрын
Very nice.Thanks
@sagarneupane7706
@sagarneupane7706 2 жыл бұрын
Nice video sir,
@selvakannanselva
@selvakannanselva 2 жыл бұрын
Sir please explain the panel fault like double image why that happened what is the possible solution and how long it will work after service
@aceselectronicsrepair1700
@aceselectronicsrepair1700 Жыл бұрын
Good day Sir pls. can you explain why the lcd screen turn to double image & flickering image thank you & God-bless
@crineuic3924
@crineuic3924 8 ай бұрын
why does the liquid crystal make a pattern when it leaks
@sivasuriyanplathottathil1305
@sivasuriyanplathottathil1305 2 жыл бұрын
I like your videos 😊👍🏻
@donatusobalum3966
@donatusobalum3966 2 жыл бұрын
Thank you
@NishanthSalahudeen
@NishanthSalahudeen 4 ай бұрын
2:01 you say cholesteric have twisted structure and Nematic have common orientation, yet no structure. Then in 2:14 you said Twisted Nematic is used in displays. Why take unstructured Nematic and do something (like anchoring layer) to twist it when cholesteric is already twisted? thats one question. second question is ... you said there is no layerwise structure in Nematic. then how come when you use the anchoring layer, the successive layers of moleculeas further and further away from the anchoring layer tries to align with the first layer right next to the anchoring layer? without this aligning tendency, there would be no twist. so TN have aligned layer or not?
@hassankichchou2040
@hassankichchou2040 Жыл бұрын
Very good
@samsonloyshock3465
@samsonloyshock3465 Жыл бұрын
good video
@user-jd2sf9ui9i
@user-jd2sf9ui9i 2 жыл бұрын
Thanks
@RSAT01987
@RSAT01987 2 жыл бұрын
Super sir thanks 💐💐💐
@mosharufhossain2166
@mosharufhossain2166 Жыл бұрын
you are great
@GmoSerran
@GmoSerran Жыл бұрын
Hello, I'm trying to create some electronics to test the LCD hub, but it is hard since they have a camera and microphone. Do you have any idea how to do this, something to test the LCD hub, backlight, microphone, and camera
Жыл бұрын
I will think about it
@sadiquebasha4995
@sadiquebasha4995 Жыл бұрын
Hello, Genius, I'm getting a big doubt about LCD/LED TV's COF IC. I'm not getting any idea about this, because, I don't have a Microscope or DSO. If you are interested to help, please take a small test about this COF with IC & without IC. Everybody knows all signals are coming from the T-CON board to the LCD panel with the help of the COF bonding method and its signal testing points also given in this COF. But, why need this COF and what is the role of this IC? This IC's data is hidden or this is not an IC. Please clarify the truth about this COF.🤔
@meisuci4708
@meisuci4708 Жыл бұрын
What's the function of the LCD bezel? Can I cut half of the upper side of the LCD to reduce dimension and resolution?
Жыл бұрын
The TV bezel is the frame around the screen. It's what holds the screen in place and protects it from damage. Never cut an LCD screen because it will end up in the garbage
@meisuci4708
@meisuci4708 Жыл бұрын
@ how about this? kzfaq.info/get/bejne/sMuVl66HnOCtmYk.html
Жыл бұрын
the video confirms that the screen can be destroyed with the scissors
@meisuci4708
@meisuci4708 Жыл бұрын
@ but the picture still appear, no blank or damage
@MrFido7up
@MrFido7up Жыл бұрын
Awesome @3:17
@AnsariElectronics430
@AnsariElectronics430 2 жыл бұрын
I have request to you plz make a deatail video about the detail and working of COF. Thanks❤️
2 жыл бұрын
you will find in the playlist 2 videos about COF gate driver and source driver
@AnsariElectronics430
@AnsariElectronics430 2 жыл бұрын
@ bundle of thanks
@idp4037
@idp4037 Жыл бұрын
👍👍👍👍👍👍
@antoniomartinezlopez2183
@antoniomartinezlopez2183 Жыл бұрын
Por qué no se subtitula al español?
Жыл бұрын
la razón principal es que no conozco el idioma. Eventualmente podría utilizar un traductor en línea para hacerlo.
@antoniomartinezlopez2183
@antoniomartinezlopez2183 Жыл бұрын
Hay muchos colegas que preguntan lo mismo. Es muy importante para nosotros los técnicos reparadores hispanos que por lo menos el vídeo traiga la posibilidad de subtitularlo al Español
@sureshganduri8867
@sureshganduri8867 Жыл бұрын
👌🙏🙏🙏
@safeH888
@safeH888 2 жыл бұрын
Thank you sir..
@mosharufhossain2166
@mosharufhossain2166 Жыл бұрын
@b.mandal
@b.mandal 11 ай бұрын
Please upload new video. We enjoy
@thelefttechcat
@thelefttechcat 6 ай бұрын
this wouldve been considered witchcraft 25 years ago. Fascinating
@rat_world
@rat_world 4 ай бұрын
It’s witchcraft now
@louf7178
@louf7178 8 ай бұрын
This makes it more appalling (besides sheer waste) that certain TVs are considered "disposable".
@RedDeckRedemption
@RedDeckRedemption 12 күн бұрын
Haha fear not, a lot of these don't actually end up in landfills. I'm one of many who hunt for TV's for scrap lol, steel, aluminum, copper, and the electronics for gold/silver recovery, and the LCD screen contains indium. Apartment dumpster ar as are rich with them
@GurvinderSingh-zc3je
@GurvinderSingh-zc3je Жыл бұрын
Very breaf explain
@PeterPete
@PeterPete Жыл бұрын
white is not a colour!
@louf7178
@louf7178 8 ай бұрын
White is all colors
@veroniquedaumas5200
@veroniquedaumas5200 2 жыл бұрын
😴 😒 😂 hello!
2 жыл бұрын
you welcome
@MinNeTi
@MinNeTi 2 ай бұрын
LED is not a type of LCD TV or monitor.
@suhaimiseliman8593
@suhaimiseliman8593 11 күн бұрын
DO ALL SUBPIXEL ( TRANSISTOR ) MOVE CORESPOND WITH ICON MOVEMENT...?🫣😎🤔
@mannalcd-ledtvservicecentr9698
@mannalcd-ledtvservicecentr9698 2 жыл бұрын
Very good
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