Actual LED TVs? do they exist?

Jul 27, 2020 35 Replies

But different LED colors result from different semiconductor compositions; it is sometimes possible to grow a thin layer of (for instance) red-LED GaAsP on a silicon wafer, but subsequently growing a green or blue (InGaN) wouldn't work (might not stick to the wafer, or would damage the underlying layers...)

Multicolored integrated circuits with three (or more) LED shades are theoretically possible. There's a LOT of bugs to work out, though.

Actually assembling an array from loose parts... is possible, but impractical. Onesies of three colors is a start, but a display has millions of pixels.

F*ck you. Google didn't find the answer, the group did. I win.

When I don't know a term, which happens frequently, the first thing I do is google it. I don't bother other people at that stage.

Once I've formulated a question that I can't trivially find an answer to, then I might ask people to spend some of their remaining life helping me. But I hold off on doing that since I can't repay their time - and not considering other people is rude in my book.

What I don't do is belligerently ask "does X exist", when you can buy X in the shops and even ask a salesdroid the question. If someone provided a (snarky) answer, I wouldn't accuse them of being rude.

There was a famous example back in the mid 80s, when usenet was small but evolving. Somebody got tired of the questions that could be answered trivially, and pointedly asked "What is the time?" People realised what he meant, and modified their behaviour to be mindful of others.

That lasted several years, until "eternal September" and Canter and Siegel screwed things up.

Are you always so crabby? That's a bad way to live.

I like to live in a world where writers consider their readers.

I'm not too tolerant of people that can't be bothered to learn how to use google, and then post things like....

On 29/07/20 00:48, Commander Kinsey wrote: > F*ck you. Google didn't find the answer, the group did. I win.

If a person has never heard of an OLED, it's hard to google OLED.

I think we should be kind and helpful to people who are perhaps not as experienced, maybe not as intelligent, as we are.

In a colour CRT, the electrons are of a single "colour", but RGB phosphors produces the various colours. Just use an array of blue LED wafers and use tricolor phosphors on each pixel as in cameras.

I always thought that we could use time-sequenced RGB backlights and a uniform LCD panel. That would be very efficient. I guess the LCD elements are too slow.

John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard

So much for a polite discussion. You're not fit to command, yet. Real commanders should know how to insult without resorting to profanity.

I try to not write anything that I would not consider worth reading. You might try that approach in the future. It works.

If you had inscribed your original questions into Google: "Are any TVs just LED?" the first result is: The article goes through the major LED TV display and lighting technologies. Along the way, it mentions OLED and QOLED (quantum dot LED) with links to more detailed explanations. That should have been sufficient to answer your question.

Google and the Duck2Go have spent considerable effort producing search algorithms that will successfully parse vague questions. If I don't know or can't remember the magic buzzword, I can usually find it in the first few pages that these algorithms produce. Like flash RAM, Usenet is a read before you write system.

The second part of your question "do they exist?" is also easily answered. If Google can't find it, it doesn't exist.

Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

Because OLEDs suffers from image retention, burn-in, fade-out, color change, and brightness loss. The degree of these effect vary with LED color as well as brightness. Today's OLED TV's claim a lifetime of

100,000 hrs (11.4 years). In the not so distant past, OLED displays were lucky to make it through the warranty period[1].

"OLED TV Reliability"

"Real Life OLED Burn-In Test on 6 TVs"

[1] Look at older used OLED smartphone ad photos and you'll probably see some fairly severe example of image burn-in. That's because smartphone icons tend to be in static locations. This is one reason that "dark mode" is important with an OLED screen. OLED rely on not having the same images, in the same places, on the screen to prevent burn in, but exceptions are still a problem. One of my customers installed an OLED display as a security camera monitor. 6 months later, it started to show burn-in problems.
Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

Arguably he /is/ fit to command: he gets his underlings to do the work.

Just as Prince Charles is reputed to have a footman put toothpaste on his toothbrush.

An alternative explanation is that he is a (wannabe) troll.

How very old skool. Millennials have moved on beyond that.

He doesn't like to recognise your other points, which are accurate but inconvenient.

Nematic ones are continuously variable but very slow. Ferroelectric ones are faster and can be made to work like that, as in FLCOS displays, but are either on or off. They use RGB LED sources and duty-cycle modulation to get the full-colour effect, similar to how DMD (digital micromirror) displays work.

Cheers

Phil Hobbs

Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net https://hobbs-eo.com

Shouldn't be nowadays. They've long been able to go above 50Hz. You only need to get to 150.

And real humans know that profanity is just words. Which annoys you most?

1) You absolute and utter moronic fool. 2) You silly s**te.

With snobs maybe.

You got lucky with the right keywords then.

And sometimes those algorithms fail. It's not as bad as back in the days of Webcrawler, but it's not perfect.

Nope, it works without reading first.

Or I didn't feed it the right words.

ote:

?

It's funny that you can't come up with anything better to say that this. T he point is that using either of these phrases means you have failed.

This group brings out the worst in me sometimes. I'm pretty sure I say thi ngs here I would never say to a person standing in front of me. But then I would most likely never converse face to face with most of the people I ha ve those sorts of conversations with online.

You are pretty much at that point online. You have so little to say that a nyone wants to hear it is amazing.

of Webcrawler, but it's not perfect.

The one (of many) I have trouble with is when I can't quite describe a word that I'm looking for and can't get it to turn up in any Google searches.

Rick C. - Get 1,000 miles of free Supercharging - Tesla referral code - https://ts.la/richard11209

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