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.
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.
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
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.
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.
tech engineer here, the amout of banding and DSE on panels now is disgusting and insane, spend a personal 80k on tvs between 2020-2022 just to study the insides, but also returned about 30k worth because quality control is insane right now but all brands are Chinese CRAP so it's typical, im getting on indiegogo to rise money to make TVs myself and fix these problems
The quality really is atrocious. It's sad, because I think LCD technology with local dimming has a lot of potential, especially in the computer monitor market. OLED is great but burn in is still very much a problem.
@@justinbroniszewski yep, its all big greedy corporations, ive owned LCDs since 2007, never had DSE or banding, didnt happen till they ran to Chinese flooded markets for panels
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!
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!
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...
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.
This is what all "white" LEDs are, blue plus phosphor. It's easier to generate a pure color (monochromatic) light and then color convert to broaden the spectrum. Also possible is three different colored LEDs (R/G/B) but this is costly.
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.
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"?
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
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.
@@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.
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!
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).
Yes, the DSE and banding is insane right now because all panels are made in china, ive owned LEDs since 2007 when they first came out, never had a problem till after 2018, TCL which is the worlds largest LED panel maker bought out Samsung and it all started after that, and then every other company followed because there allows to get away with it, the sony bravia 9 this year had absolutely awful dirty panels, any company that makes a person pay $3000 for a TV with a panel like that is criminal, I actually found out how to fix banding, it's because samsung buys there backlights in pieces and then it's put together, it leaves gaps between the circuitboard which shows up as grid patterns or lines across the screen, simple fix would be to make one giant solid piece of circuitboard for the backlight. It's literally that easy LOL amazing isnt it? All because its *CHEAPER* to piece it together. shows how money hungry companies really are, as for DSE, a simple machine that would scan and then switch out LED Bulbs until panel was almost DSE free is all thats needed. It's amazing how they go just up to fixing these problems and then stops......why? Because a bored member might make 120k less a year id they did............
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.
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.
I always thought edge lit was better, i had a 2014 samsung curve 4K edge lit that was $7000 new, and believe me. Its was better then ANYTHING ive seen last 5-6 years which has been absolutely Chinese crap, edge lit never got much brighter them 450nits because of no backlight, but i would like to see a edge lit using miniLED, it would be much brighter and run cooler, the 2015 samsung JS9000 edge lit after about 4 years had really bad problems with burn in image on side of screen, because traditional LED ran so hot, they should have added quiet fans inside
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
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.
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?
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.
Impressive teardown
Very informative and educational! Thank you for your effort.
Friend !
Your work is very cool.
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
Any idea what's the problem if there's black shadow on the screen? Is it something to do with LED lights?
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!
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.
Very interesting! Thank you so much for this. Cheers from Finland! ;)
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!
its incredible 😍😍
thanks for your detail explanation about this.. very enjoyable to watch it.
tech engineer here, the amout of banding and DSE on panels now is disgusting and insane, spend a personal 80k on tvs between 2020-2022 just to study the insides, but also returned about 30k worth because quality control is insane right now but all brands are Chinese CRAP so it's typical, im getting on indiegogo to rise money to make TVs myself and fix these problems
The quality really is atrocious. It's sad, because I think LCD technology with local dimming has a lot of potential, especially in the computer monitor market. OLED is great but burn in is still very much a problem.
@@justinbroniszewski yep, its all big greedy corporations, ive owned LCDs since 2007, never had DSE or banding, didnt happen till they ran to Chinese flooded markets for panels
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!
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!
I have a question can i transfer the qled flims to a another tv that is old LED tv ? Or should i just do it and see by my self ?
Very good!!! Deep analysis❤
nicely done!
Thanks!
Height of skill boys. Highly impressed Lahore Pakistan
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/
Why do they use blue leds for backlight?
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.
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!
Why are there blue LEDs used and then "transformed" into white light, instead of using white LEDs?
This is what all "white" LEDs are, blue plus phosphor. It's easier to generate a pure color (monochromatic) light and then color convert to broaden the spectrum. Also possible is three different colored LEDs (R/G/B) but this is costly.
Thank u for sharing this very informative video
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.
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).
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
These backlight light diodes works only one year.
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!
How many dimming zones are there in this tv ?
This one was 90 zones, 180 LEDs if I recall.
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).
Yes, the DSE and banding is insane right now because all panels are made in china, ive owned LEDs since 2007 when they first came out, never had a problem till after 2018, TCL which is the worlds largest LED panel maker bought out Samsung and it all started after that, and then every other company followed because there allows to get away with it, the sony bravia 9 this year had absolutely awful dirty panels, any company that makes a person pay $3000 for a TV with a panel like that is criminal, I actually found out how to fix banding, it's because samsung buys there backlights in pieces and then it's put together, it leaves gaps between the circuitboard which shows up as grid patterns or lines across the screen, simple fix would be to make one giant solid piece of circuitboard for the backlight. It's literally that easy LOL amazing isnt it? All because its *CHEAPER* to piece it together. shows how money hungry companies really are, as for DSE, a simple machine that would scan and then switch out LED Bulbs until panel was almost DSE free is all thats needed. It's amazing how they go just up to fixing these problems and then stops......why? Because a bored member might make 120k less a year id they did............
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.
It's so cool thanks i saw it first time
Mini LED samsung pls
Very interesting! Thanks
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.
I always thought edge lit was better, i had a 2014 samsung curve 4K edge lit that was $7000 new, and believe me. Its was better then ANYTHING ive seen last 5-6 years which has been absolutely Chinese crap, edge lit never got much brighter them 450nits because of no backlight, but i would like to see a edge lit using miniLED, it would be much brighter and run cooler, the 2015 samsung JS9000 edge lit after about 4 years had really bad problems with burn in image on side of screen, because traditional LED ran so hot, they should have added quiet fans inside
8:00 Favorite part
It is very cool "watching" content with no LCD, only LEDs
Very informative video
Good learning
👏🏼👏🏼👏🏼👏🏼👏🏼👏🏼👏🏼🙌🏼🙌🏼🙌🏼👍🏼👍🏼
Привет,я наконец то увидел qd film спасибо
Wow, cool
Mini led
Well explained. I repair tv.
they are a cute couple