QLED TV teardown and analysis
Вставка
- Опубліковано 22 чер 2024
- Taking apart and analyzing a 65 inch Vizio MQ8 LCD TV. This TV has full array local dimming (FALD) and quantum dot (QLED) technology. We take a look at the inner workings and analyze the color quality of the QD film as well as got a unique look at how LEDs behave in a FALD TV by watching an epic game of "snake" with the LCD panel completely removed.
- Наука та технологія
Pretty cool tear-down Peter. The layer-by-layer film analysis was actually slick and very educational! Looking forward to much more with the latest QLED/miniled versions.
I would love to get my hands on a 10k+ mini led QLED display to take apart! Next two videos will be TCL and Samsung QLEDs for now.
I agree it was an amazing breakdown
As someone who was recently introduced to all these led technologies while surveying for my new tv, this is really great to show how they are actually working. ❤
Thank You for taking the time to make this video.
I was referred here by Scott Wilkinson (home theater geek) on a show called
The Tech Guy with Leo Laporte.
Glad you enjoyed it, and thanks to Scott and Leo for the shout out!
This upload was just mentioned on the Leo Laporte tech show on KFI.
Awesome, thanks! Is there a link to a recording or something?
Very good !!!
I really liked the analysis, it taught me a lot.
Please more videos.
Impressive teardown
its incredible 😍😍
thanks for your detail explanation about this.. very enjoyable to watch it.
Very good!!! Deep analysis❤
Friend !
Your work is very cool.
Very interesting! Thank you so much for this. Cheers from Finland! ;)
Thank u for sharing this very informative video
nicely done!
Thanks!
Awesome! Never realized that the BEF/DBEF films would also "rebalance" the red, green and blue spectrum.
I think during almost every teardown I do I have an "a ha!" moment like this.
Very informative video
It's so cool thanks i saw it first time
Cool!
Nice to see the way the zones operate.
I know, right!? We had a blast playing with different videos and loved the way the snake game came out. Now I want to do this with a TV that has 10k zones!
Very interesting! Thanks
Good learning
Wow, cool
Amazing video! I wish to see the same, but in a mini-LED backlit LCD. The red-geeen nano crystals do convert blue light in an almost pure white exhibition, whereas the colors quality becomes enhanced...
That was super interesting to see! What's the idea of the pairs of LEDs? Just one of those "it's cheaper and it doesn't make enough difference to modulate each one separately"?
Yeah, I think it's a cost thing, maybe for redundancy too in case one fails (but with only 190 LEDs I'm sure if one fails it will look horrible).
how was the pc connected to show fald ? the 8 min mark was awesome to show off what it looks like without the lcd. I sub your channel as it's awesome
It was mini display to hdmi through an adaptor. Thanks for the sub!
It would also be good to know what the other major circuit boards are and their functions.
Good idea, I'll see if I can identify these better on future teardowns!
@@NanoPalomaki would you teardown a QN65Q70AAFXZA?
Hi I love your videos. There is no other video that in-depthly shows the layers of film and diffusion. I accidentally got the order of the layers mixed up I would love if you could do a video on a older model Vizio smart tv 65 inch or 55 or higher. I replaced the backlights and I’m struggling to put the tv back together And there are so many screws
awesome! i want to know which instrument you have been using for color spectrum analyzer?
It is a UCB spectrometer from Avantes. www.avantes.com/products/spectrometers/compactline/avantes-spectrometer-mini-2048cl/
Before I started watching the video I thought: I would be great if they showed the spectra of the film.
I was pleasant surprised when you pulled out the spectrometer.
Love my trusty little spectrometer!
Very Interesting!
What kind of spectrometer did you use?
Thanks
It's from Avantes. Nice little USB powered spectrometer, I encourage you to check them out if you are in the market for one!
Please make teardown of various type of screen.....OLED, qd OLED, mini LED, micro LED currently available in the market
Will do my best! No true microLED is available yet, but I do hope to compare OLED, QD-OLED, and mini LED back lit and edge lit displays with and without QLED.
wow, that is really interesting.. i have opened and repaird many conventional led tv's but never opened a Qled TV. It seems those led strips are different and can be controlled in zones of 2 leds.
It would have been interesting to show us that unusual board that controls the leds and that it is not present in a normal led tv.
Yes, the zones appear to be in twos. I wouldn't know where to start with the board to be honest! I know the optical system well, but not the control electronics!
Привет,я наконец то увидел qd film спасибо
Could you test if qd film changes the polarization of light? Let's say I'd shine a polarised blue light on to it, is the output also polarised?
Good question! QD emission is by it's very nature non-polarized. If you excite it with polarized light you will get non-polarized light out. This is why it exists in the backlight before any polarizer films and LC.
8:00 Favorite part
It is very cool "watching" content with no LCD, only LEDs
👏🏼👏🏼👏🏼👏🏼👏🏼👏🏼👏🏼🙌🏼🙌🏼🙌🏼👍🏼👍🏼
It also looks like you can see some [self?] absorption going on in the green QD. By visual inspection, the peak red shifts as you add in the BEFs, which I'm assuming is due to the the blue edge self-absorption. It's not as apparent in the red peak.
Why did I never think to film my tear downs?
Word to the wise, if you want to save the TV, be ULTRA careful with the ribbon to the LCD...
Keen eye there Jonathan!
so a qled tv is basically a led with a quantum film?? if so then could i chage my led tv to a qled one just with adding the film?
Not quite that simple, it would definitely impact your color if you simply add an extra film because the LEDs in a "normal" TV are white LEDs (blue + phosphors) while in a QLED tv they are blue only.
could I ask a simple "silly" question about the panel? I see a kind of a film like those films used on mobile phones. Is it for anti-glare? Or something more complex about the display technology?
I ask for knowledge reason but mainly because of a 3-4 inch scratch in length that I got from someone working in my rooms wall.
Often there is an antiglare film on the front of the display, yes. Scratch in this film may be difficult to repair.
@@NanoPalomaki I would say it is impossible to fix the scratch on this film. What I would like to know if this film has something to do with the reproduction of image. If it's only for anti glare purpose I could remove it.
@@NanoPalomaki thanks for the answer dear
Hey...can you suggest me one thing...i have accidentally removed the polarizing film from the Samsung neoQLED TV ..as I thought it as a protective layer on the screen...and my screen appears white now... SAMSUNG have refused to replace my tv since it is a physical damage..it doesn't comes under warranty....they are suggesting to replace the whole display panel...which is almost the cost of the TV...what should I do now...should I buy a local polarizing film.from the market???will it cause quality difference??...plz suggest me something...I am helpless now...
I'm surprised that a polarizing film removed so easily! Finding a replacement polarizing film may be difficult, but they should not be too expensive so it could be worth a try if you can find one. The orientation will matter, so test it before you adhere it!
This was remarkably interesting. I feel like I was taught how modern TV's lighting works by the guy who invented LED TV's with local dimming. I just took apart a broken LED with the array about half as dense. I took them all out 0about 5 strips that look identical to your TV. Any ideas what to do with these? Or what about the Fresnel lens or other light diffusing layers?
The strips can be sold to others who have LEDs go out. They can be in series or individually powered depending on the TV. Individually they are about a 2.5V-3V forward bias/breakover voltage. They are extremely bright, but the strip also acts as a heat sink. If you power one up not soldered onto the strip, even with the proper resistor, it will burn itself out or very dim in a matter of minutes.
Mini led
So if the layers aren’t perfectly lined up is that what DSE comes from?
DSE (Dirty Screen Effect) is from uneven colors/light. If the LEDs are not all uniform in color/brightness this can cause DSE, also non-uniformities in any of the layers (including films, LCD, etc). Certainly if one of the films were to become dislodged or something you would be able to see this optically. However they are all held in place together and unlikely to become damaged unless you tear them apart like me (or drop them or something).
Dr. Palomaki. You have all the expertise needed to answer this one question. Which screen cleaner is both safe and effective for HDTV's? There are so many snake oil products out there it is impossible to decide. I assume different manufacturers and various technologies might require different surfaces. Manufacturers duck this question and a drop of "Dawn" and distilled water does not always does the job. HELP
Many of these TVs have a plastic-based film on the front, but each manufacturer will be different so I'm not sure what is best for yours. I use a regular screen cleaner with microfiber cloth.
@@NanoPalomaki That is exactly the issue I'm struggling with. My hope was that you had the expertise to perform a few tests on different manufacturers screens and determine if there was any damage after a few applications of a sample of cleaners and were even simple finger prints effectively removed. But if this does not appeal to you or seems tedious, I understand. I'd very much like to know your "regular screen cleaner". My HDTV is a Samsung QN90A.
I honestly believe there is a real need for this information and given your expertise on plastics / optical characteristics I thought you ideal
How many dimming zones are there in this tv ?
This one was 90 zones, 180 LEDs if I recall.
Mini LED samsung pls
How does a full array of LED's compare to a TV set that promotes edge lit LED's?
The full array of LEDs allows for generally brighter, more uniform displays as well as the ability to locally dim when the images have dark areas. Edge lit is much cheaper though.
Well explained. I repair tv.