- Видео 10
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NanoPalomaki
США
Добавлен 22 фев 2022
I'm a scientist who loves to understand the inner workings of technology and share them with the world. I have a keen interest in Quantum Dots and optical materials (especially in display technology). Follow my page to see teardowns of displays and other optical technologies including in-depth analysis that you won't see anywhere else.
Why Are Streetlights Turning Purple? In Depth Analysis and Fix
Have you noticed weird colored purple or blue LED streetlights where you live? In this teardown we take apart a streetlight that has shown significant color shift to blue, and diagnose what has gone wrong as well as propose a possible fix (without complicated and costly replacement). Comparison to a new, good streetlight and analysis of the differences at the LED level are performed.
Major findings include:
-LED phosphor layer has physically removed (delaminated) from the LED die, causing increase in blue light output and reduction in down-converted colors (white).
-Significant loss of useful light output (illuminance) for failed LED lights
-Adding remote phosphor layer can improve color poin...
Major findings include:
-LED phosphor layer has physically removed (delaminated) from the LED die, causing increase in blue light output and reduction in down-converted colors (white).
-Significant loss of useful light output (illuminance) for failed LED lights
-Adding remote phosphor layer can improve color poin...
Просмотров: 331 495
Видео
Rebuild of a TCL-Roku TV
Просмотров 7 тыс.Год назад
Reassembly of a TCL-Roku TV 55 inch (QLED, 55S555). Putting it back together and testing to see if it still works. This is a follow up to my teardown video of the same TV - Video here: ruclips.net/video/KEV3fxrNBnc/видео.html
Inside a TCL Roku QLED TV with the LCD removed
Просмотров 14 тыс.Год назад
Deep inside a Roku TCL QLED TV (5 series 55S555, 2022/2023) I take this TV apart and operate the LCD separated from the backlight. You can see that it is actually partially transparent and see how the color filters operate to generate colors. Also I take a look at what is generating color in the back light unit (BLU) including the LED and phosphors and quantum dots. A new technology using an ex...
Peek inside QD-enabled Displays (TechBlick 2022)
Просмотров 3,1 тыс.Год назад
Presentation by Peter Palomaki at TechBlick microLED and QD conference in 2022.
Dissecting a Samsung QLED TV (75 inch)
Просмотров 40 тыс.2 года назад
We are taking apart a Samsung QLED TV. This model (Q7) is a 75 inch LCD display with QD (quantum dot) technology. We removed the LCD to expose the full backlight unit and analyze the optical spectra including QD film. Interestingly we find phosphor converted LED in the back light contributing to the red and green color (in addition to the QD film). Full teardown and analysis of what we find on ...
Destroying a QD-OLED - Part 2
Просмотров 14 тыс.2 года назад
We go deep inside a QD-OLED to look at pixel structure, the OLED source, and reflection handling. Found some very interesting things along the way! Part 1 of the series: ruclips.net/video/0esg-HFbRkw/видео.html
Destroying a QD-OLED (Samsung S95B) - Part 1
Просмотров 61 тыс.2 года назад
Teardown of a Samsung S95B QD-OLED TV with spectral analysis of color and piece-by-piece disassembly. Part 1 of 2. Part 2 is now live! ruclips.net/video/o-LbIBRuyog/видео.html
Surprise inside a QLED TV
Просмотров 10 тыс.2 года назад
Taking apart a TCL QLED TV with quantum dots inside we found some other interesting optical materials. This LCD TV contains both quantum dots and phosphors along with a unique lens design for optimizing performance.
QLED TV teardown and analysis
Просмотров 52 тыс.2 года назад
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.
You don't need to wear those ridiculous glasses. There's no benefit to them
These backlight light diodes works only one year.
Ive gone thru a 1 mile road that has nothing but purple leds, kinda cool and i dont think they'll fix it till they burn out
Oh they aren't supposed to be blue? lmao
Around 2022, the market started to see the emergence of these types of QD TVs. They are usually priced at about 1/3-1/2 of what normal QD TVs used to ask for, and they all use White backlight with KSF + a tiny bit of QD, in comparison to the traditional Blue LED backlight on QD TVs. As a result, these can only achieve 94-95% DCI-P3 and have weaker red-green coverage. If anyone is looking for 97-98% coverage in traditional QD TV reproduction, you need to stay away from mid-tier products from like TCL and Hisense. Samsung is still using blue backlights for their QD TVs.
In other words, cheap coating of the led . I used to go the restroom at Starbucks in a neighborhood of Seattle. The light inside was a dull purple and I asked when leaving why. I was told it was to dissuade drug use in the restroom. So, I take the streetlamps are just because of poor manufacture and not for drug use discouragement.
The street lights in my neighborhood, one night they would be blue and the next night they would be white, they would kind of go back and forth each night between blue and white.
Why do you think we are watching this on an iphone? I am watching on my desktop PC!
I was told they were to prevent people from doing dr*gs underneath them due to the blue light supposedly making it harder to see your veins or something. That explanation never really sat well with me because it was just random lights like that.
I love the bluish purple, so sci-fi
If you know, you know.
I’ve noticed the purple lights when traveling back home to NC for years now. It’s an ongoing conversation with my brother. None to be found in mid to Eastern TN.
From what I understood at the time, most, if not all of these defective roadway fixtures came from one fixture manufacturer, American Electric Lighting (AEL), which is part of Acuity Group. It was quite entertaining to watch all the conspiracy theory videos on these fixtures, especially during the peak Covid fiasco, where people would say these blue LED fixtures were purposely and strategically placed to detect people who were unvaccinated, lol. I think what really sent these conspiracy theories through the roof was the fact the defective fixtures were not being immediately replaced once found, most likely due to warranty replacement process overwhelmed due to the number of fixtures out there that were bad, and manufacturer could not build new fixtures fast enough and shipped out fast enough to meet demand. Upon watching the fix portion of this video, it seems to me painting the phosphor layer on the back side of the plastic lenses would be a better solution and the phosphor paint would be protected from the elements, of which painting the phosphor on exterior of lense which is exposed to the elements. This would require removal of lense sections, painting and reinstallation, but would protect the phosphor coating and place it closer to actual diode. Back in 2010, I did a large roadway fixtures fast enough replacement project on two military bases from HID to LED. The first shipment of fixtures had the wrong optics (type II, which was supposed to be type III). So rather than ship the fixtures back to Florida from California, the manufacturer’s rep had the factory ship out replacement optics, the plastic cover sections containing control lenses which aligned over each LED diode. Me and a co-worker spent around a week replacing the lenses in roughly 150 fixtures, which was a bit tedious, but after doing a few, it got easier and faster. Each fixture required replacing two lense sections, making sure the lenses were installed in correct orientation, and all gaskets seated properly and secured. There is a multilevel parking structure in the downtown area of my town. The top level of structure has four poles with shoebox LED fixtures. All the fixtures have blue LEDs, and it appears they were purposely manufactured this way most likely to keep the homeless off the lot. I might be wrong.
i actually like the purple lights
Do you think after painting, the phosphorus would still delaminate after heat cycles? Would it be better to paint the inside of the lenses? Great video, THANKS!
When the manufacturer skimps on every criteria in order to provide a product that undercuts the competition, and regulations compell the buyer to purchase the lowest bid... I recommend that the bidding contract language include that the supplier will promptly reimburse all reasonable labor for repair within the warranty period, and be given priority in the event of bankruptcy. 6:59 The white strips (that are carriers for the conductors) are wrinkled. They may not be durably bonded to the aluminum backing plate. This would cause the LEDs to overheat and then delaminate the phosphor coating. It is also possible that all the LEDs are overdriven for the application. It is also possible that the backing plate is not thick enough to dissipate the heat. It is also likely that the LEDs are not current regulated to limit junction temperatue by throttling current (and brightness) at higher ambient temperatures.
Here in nc (charlotte/gastonia area) they told us on the news they were bad lights that were used and they was not going to change them until they went out
Guess that means the streetlights on the highway in Pittsburgh are bad. They just replaced them not to long ago and now they all purple. 279 north leaving Pittsburgh.
thank thank you for showing
How many dollars did he spend to destroy those TVs?
These blue lights are actually producing UV light
Theyre intentionally like that. Ive seen them put new ones up like this.
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 ?
What's the par for the led lights
I think they broken lights look really cool I don't want them to be replaced
Bright white LED lights suck. Horrible for your eyes. They should have left the high pressure sodium lights up everywhere
In my city, people got so sick of poorly made LEDs in their neighborhoods that the city actually switched back to High Pressure Sodium!
Just let us have the option of keeping the blue. Or go back to high pressure sodiums, mercury vapors and metal halides. LED's are over rated anyways. Too many eco bros humping the idea of costs over quality.
These are NOT defects these are due to legitimate design flaws
I stumbled across your video while trying to find videos showing how to repair a TCL 65R617 on which the backlights had gone. Kind of crazy that a TV which was known as the best midrange TV for gaming in 2018 has no videos on RUclips showing repairs. Even searching 65R or 55R had very few results, though this wasn't helped by uploaders rarely providing the model number of the TV they were working on. Plenty of S models, but no R series. Nonetheless, I watched enough videos to think I had the skills to attempt the repair myself. Ordered an LED tester, replacement strips, suction cups, other tools, and all was going well until it came to removing the bezel. Like the model in your video, it seems to require a heatgun to access the screws holding the side and top bezel in place. Just absurd. I gave up at that point. With the high failure rate of TCL TVs, you can't tell me this isn't a deliberate choice to discourage repairs. I can understand the adhesive on phones and tablets I suppose, given they are advertised as waterproof these days, but gluing glass to the BACK of a TV? Ridiculous. As luck would have it, Amazon dropped the price on a 65" LG OLED G3 to $999 for a whopping 13 minutes tonight but I was able to snag one.
I actually like the purple, I mean don’t get me wrong I wouldn’t want them everywhere, but when a certain street has a few of them, it looks kinda cool
Damn LEDs. Expensive, containing tons of elements that have to be *mined* first. Usually, the power supply module is a failure point, as it's as chintzy as humanly possible - just to work a couple hours after leaving China's factory. But seeing flaking off phosphor is a different layer of abstraction. If that alone wouldn't be enough, LED's power output decreases quickly over time *especially* in HP LEDs, as heat is another thing that destroys LED's chip quickly (just like in case of every other semiconductors). And contrary to what's advertised, LEDs are not that remarkably power efficient, especially compared to high-pressure sodium lamps and even to metal-halide lamps. Damn hype both in high and low power applications, with CRI comparable to banana set on fire (yet advertised as "white").
Thank you. Spread the truth.
I have a couple of streetligths that supposedly work but are blue. However, im having issues wiring them. I connect hot, neutral, and ground to a 120v outlet and nothing... am i missing something?
The phosphor excited by blue LEDs burns out. The same happens in an LCD TV when you run it at 100% backlight.
Sir. Next video O LED manual send sir
How do you think that the LED phosphor coating is applied. I ask because in my recent video titled "Hunting for purple streetlights in Kansas City video 365 Exhibit B: Important evidence of chimerism" (December 2024) I see that the odd positions remained white at least 14 months after all evens had turned purple on both neighboring streetlight poles. These seem like an example of a rare case in which the phosphor coatings were not the same (one was defective while the other was not and they are interlaced in this case). So that you can see what I mean, without copying a link, here which will just result in this comment not registering, you can see video 218 Exhibit A at the 1;57 and the 3;38 mark (from back in October 2023). Usually both the odds and evens change, but usually with a lag in one or the other. Nonetheless, in a video recordings in Dodge Center MN of purple parking lot lights and in Kansas City videos 202 Exhibit B, 232 Exhibit B, 238 Exhibit A, and 280, you can see that sometimes these predispositions or batches exist for phosphor coating or something that eventually fails, but by different modes of application or something.
Nope, private prisons installed All New purple lights across the whole property months ago, purposely. Dig deeper y’all.
So, what's the big advantage that makes LEDs worth all the downsides? Energy efficiency isn't enough by itself.
This is the only visual of a disassembled (modern) OLED TV panel that I can find on the internet. I've never actually seen someone remove the metal backing of the panel, I guess panel repairs are flat out impossible on OLEDs.
Thanks for sharing first time I seen this I thought the city did it on purpose lol.
I noticed they use the purple ones in front of none crimnals houses or area
Cuz their faulty pretty sure.
This happened to some hisense tv also. Happened to me, out of warranty 😢
I heard from a friend centain..... fluids show up under these lights.
I smell a grift. The cheapest possible lights sold for a huge markup as a “green initiative”. They fail rapidly. “Improved” Replacements are sold using the money the cities would have saved from the reduced electricity.
Our streetlights are white. Where are they purple? lol
I've seen them put these new lights up and they were never white. Always or already purple as soon as they fire them up.
I was probably an hour and a half away from home and randomly drove over a bridge that had these purple looking street lights. Honestly thought it was a holiday/festive thing.
Almost anything is better than these garish, harsh, ultra-bright white LEDs they’ve been putting up the last few years. The old HPS and MH street lights gave off a faint glow. Enough to illuminate but not be intrusive. Even in my small town, the street lights look like mall parking lot security lights. My street is lit up like a sports stadium all night and I hate it. Street lights a full block away cast a sharp shadow against a wall or the ground. It’s so obnoxious.
as the guy who does this electrical thing for a living, I can say that this did not happen in VA or DC. Hmmm. yet in the state I live in it did. they were pink, orange, blue, and purple as soon as they got the juice. They were ordered in bulk with tax dollars, and it was said to be an error in ordering info and no they will not give the money back as they are in China and they company was already bought out after selling them to several States in the USA. The same happened when we got the "new" ones from a different source so there are different lights now on different blocks and it looks crazy. It has been this way for 4 damn years now. It sucks when its foggy on the highways and it changes colors as you drive. They were rejects and bought and resold, then resold again. As I said the government places do have this problem as everything is not from foreign nations. No federal building or military base allows foreign materials ( even nails and screws) because this is a breach of security and it has been this way for government work sites my entire life. The lights at Nasa do not have this problem as an example, but at one of the major suppliers of tobacco products there is this problem down every road and parking at that factory and that is a huge complex too.