Internal structure of a liquid crystal or LCD TV screen

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e-learning électronique

e-learning électronique

2 роки тому

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.

КОМЕНТАРІ: 67
@kentslocum
@kentslocum Рік тому
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 Рік тому
lithography like how they make cpu waifers i believe is used to make the transistors amazing indeed
@FYMFTP
@FYMFTP 11 місяців тому
Fantastic video. I learned a ton! I had no idea that's how an LCD worked. Thank you for sharing.
@MarineElectrical
@MarineElectrical Рік тому
I have no words how much I would like to thank you!
@chamanlaldewangan6591
@chamanlaldewangan6591 11 місяців тому
Your video, animation and explanations are awesome.
@AnsariElectronics430
@AnsariElectronics430 2 роки тому
Great video. Always learn something new from your videos thanks for your effort. God bless you
@mrvloga
@mrvloga Рік тому
Thanks for best description about led tv internals structure
@kiergo6679
@kiergo6679 Рік тому
Woah, great video mate!
@Valdaemonium
@Valdaemonium Рік тому
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 Рік тому
Wow I never dreamed it looked like that, thanks.
@nativetravellerdeepak9562
@nativetravellerdeepak9562 Рік тому
इस वीडियो के माध्यम से मार्गदर्शन करने के लिए धन्यवाद बड़े भाई
@nbursese
@nbursese 2 роки тому
Amazing video. Thank you very much for this information.
@saa6969
@saa6969 2 роки тому
Thank you very much. I hope to get more beautiful videos
@abcabdi8523
@abcabdi8523 Рік тому
Wow! interesting & Very well Expressed.
@sagarneupane7706
@sagarneupane7706 2 роки тому
Nice video sir,
@sabasri1881
@sabasri1881 Рік тому
Sir Vere Vere supper sir. iam 📺 Work very very useful sir. Naxt video waiting
@noreezy4991
@noreezy4991 8 місяців тому
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 5 місяців тому
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.
@YFTOUCH
@YFTOUCH 11 місяців тому
Very nice.Thanks
@GurvinderSingh-zc3je
@GurvinderSingh-zc3je Рік тому
Very hard excellent explain
@mannalcd-ledtvservicecentr9698
@mannalcd-ledtvservicecentr9698 2 роки тому
Very good
@thedistinguished5255
@thedistinguished5255 2 місяці тому
if theres a vertical and a horizontal polarizing filter, what else passes through that makes the screen not black? if they block everything?
@donatusobalum3966
@donatusobalum3966 2 роки тому
Thank you
@mosharufhossain2166
@mosharufhossain2166 Рік тому
you are great
@sivasuriyanplathottathil1305
@sivasuriyanplathottathil1305 2 роки тому
I like your videos 😊👍🏻
@samsonloyshock3465
@samsonloyshock3465 Рік тому
good video
@crineuic3924
@crineuic3924 7 місяців тому
why does the liquid crystal make a pattern when it leaks
@RSAT01987
@RSAT01987 2 роки тому
Super sir thanks 💐💐💐
@selvakannanselva
@selvakannanselva 2 роки тому
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 Рік тому
Good day Sir pls. can you explain why the lcd screen turn to double image & flickering image thank you & God-bless
@user-jd2sf9ui9i
@user-jd2sf9ui9i 2 роки тому
Thanks
@Valdaemonium
@Valdaemonium Рік тому
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...🤔
@MrFido7up
@MrFido7up Рік тому
Awesome @3:17
@GmoSerran
@GmoSerran Рік тому
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
@elearningelectronique
@elearningelectronique Рік тому
I will think about it
@Breilan517
@Breilan517 2 роки тому
Exelentes videos pero serían buenos también en español
@NishanthSalahudeen
@NishanthSalahudeen 3 місяці тому
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?
@AnsariElectronics430
@AnsariElectronics430 2 роки тому
I have request to you plz make a deatail video about the detail and working of COF. Thanks❤️
@elearningelectronique
@elearningelectronique 2 роки тому
you will find in the playlist 2 videos about COF gate driver and source driver
@AnsariElectronics430
@AnsariElectronics430 2 роки тому
@@elearningelectronique bundle of thanks
@louf7178
@louf7178 7 місяців тому
This makes it more appalling (besides sheer waste) that certain TVs are considered "disposable".
@idp4037
@idp4037 Рік тому
👍👍👍👍👍👍
@safeH888
@safeH888 2 роки тому
Thank you sir..
@meisuci4708
@meisuci4708 Рік тому
What's the function of the LCD bezel? Can I cut half of the upper side of the LCD to reduce dimension and resolution?
@elearningelectronique
@elearningelectronique Рік тому
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 Рік тому
@@elearningelectronique how about this? ukposts.info/have/v-deo/spWWmIGNbrB6yok.html
@elearningelectronique
@elearningelectronique Рік тому
the video confirms that the screen can be destroyed with the scissors
@meisuci4708
@meisuci4708 Рік тому
@@elearningelectronique but the picture still appear, no blank or damage
@sureshganduri8867
@sureshganduri8867 Рік тому
👌🙏🙏🙏
@sadiquebasha4995
@sadiquebasha4995 Рік тому
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.🤔
@b.mandal
@b.mandal 10 місяців тому
Please upload new video. We enjoy
@antoniomartinezlopez2183
@antoniomartinezlopez2183 Рік тому
Por qué no se subtitula al español?
@elearningelectronique
@elearningelectronique Рік тому
la razón principal es que no conozco el idioma. Eventualmente podría utilizar un traductor en línea para hacerlo.
@antoniomartinezlopez2183
@antoniomartinezlopez2183 Рік тому
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
@Paletina199
@Paletina199 Рік тому
I need vidio in bahasa indonesia
@mosharufhossain2166
@mosharufhossain2166 Рік тому
@thelefttechcat
@thelefttechcat 6 місяців тому
this wouldve been considered witchcraft 25 years ago. Fascinating
@rat_world
@rat_world 4 місяці тому
It’s witchcraft now
@PeterPete
@PeterPete Рік тому
white is not a colour!
@louf7178
@louf7178 7 місяців тому
White is all colors
@GurvinderSingh-zc3je
@GurvinderSingh-zc3je Рік тому
Very breaf explain
@veroniquedaumas5200
@veroniquedaumas5200 2 роки тому
😴 😒 😂 hello!
@elearningelectronique
@elearningelectronique 2 роки тому
you welcome
@MinNeTi
@MinNeTi Місяць тому
LED is not a type of LCD TV or monitor.
@hassankichchou2040
@hassankichchou2040 Рік тому
Very good
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