General > General Technical Chat
An expensive TV is a poor investment, and people spend FAR too much on them
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tooki:
I’m aware of that approach too, but does anyone beside Samsung make panels like that?
bw2341:
Everyone?

It seems like every brand, including the discount ones offer quantum dot products at the top of their lineup.
tooki:
Huh, it looks like Sony reused the Triluminos name to mean quantum dots long ago. I hadn’t realized they’d abandoned the RGB LED Triluminos.
Jester:

in·vest·ment
/inˈves(t)mənt/

the action or process of investing money for profit or material result.

I have never viewed a TV as an investment.

We don't watch a lot of TV so when the old one dies, we do a quick review search to find out what's good and what's bad mostly from a reliability perspective and then go purchase what is on sale that day that matches the list we just spent 10 minutes researching. There is usually some enthusiastic shopper while we go that is into the latest and greatest and will probably pay  5 or 10 x what we will pay to get the latest feature.

Years ago when big screens were all the rage our neighbors the "Joneses" just could not help themselves and purchased this massive monstrosity. They put the cardboard box on the front lawn for like two weeks supposedly so there son could play in it. There son was about 13 YO at the time. I felt sorry for them, but we did have a few good chuckles.
tom66:

--- Quote from: tooki on February 08, 2022, 06:51:10 pm ---I’d be curious to know why RGB LED backlighting hasn’t become widespread in LCDs, instead we create broad-spectrum white light and filter it. Sony does it in some models (“Triluminos”), but I’m not aware of others.

--- End quote ---

A few years ago there was hype over blue-phase displays that would work kind of similar to this display Mike tore apart:


... but for full-colour active matrix.  The advantage is obvious: you eliminate the three subpixels, so you can simplify the manufacturing of the panel and drive electronics.  The RGB transition rate however would need to be quite fast to get over the rainbow effect, probably above 100Hz (I'm not sure how fast DLP colour wheels go in the real world) which would put the necessary switching speed around a couple milliseconds.  Allegedly blue-phase could achieve 1ms, but we've still not seen it appear commercially.

Sharp demonstrated a small mobile MEMS display that operated on a similar principle, but instead of an LCD panel, a MEMS array of shutters blocks the backlight.   Another technology I've not heard much from since it debuted - I expect it cost too much.  LCD panels are *really* cheap for what they are, and it's going to take some seriously disruptive technology to shift them.


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