General > General Technical Chat
An expensive TV is a poor investment, and people spend FAR too much on them
BrianHG:
--- Quote from: tom66 on February 08, 2022, 08:49:58 pm ---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.
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I've heard about this back in 2008 at a trade show. Infinity : 1 contrast ratio. It was for Cinema grade projectors. However, at the time, the light sources were still too hot (no super-bright led/laser white) and there was no way to cool the center of the device.
tszaboo:
--- Quote from: bw2341 on February 08, 2022, 06:35:50 pm ---My criticism of LG's design shouldn't be considered an attack. The competition between LG's OLEDs and Samsung's LCDs is excellent for consumers as they've raised picture quality and lowered prices at the same time. Still, we have to acknowledge both the advantages and disadvantages of any new technology.
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Yeah, it is insane how good TVs picture quality became in the last few years. I would argue that a 4K LG OLED is plenty good for watching movies. Of course the new QD-OLED will be somewhat better, brighter. I think the most advancement in the next years is actually not going to come from the panels themseves, rather the upscaling methods, motion smoothing, and when streaming services will improve their quality.
And about burn-in: I've never heard of anyone who has OLED who would be worried about burn-in. Just use the damn thing.
Same about the SSD that I bough 7 years ago. Flash on it got used up and became extremely slow. So I went out and bought an equivalent size SSD for 30 EUR. After 7 years.
Neper:
I still prefer radio. The picture is much better.
TimFox:
50 years ago, the American comedian Stan Freberg did a series of radio commercials in favor of radio advertising showing the power of imagination in the radio listener vs. the limited vision on a TV screen.
My favorite involved converting Lake Michigan into the world's largest ice-cream soda, completed by the Royal Canadian Air Force carefully dropping the world's largest cherry on top, accompanied by 10,000 cheering extras.
Zero999:
--- Quote from: tom66 on February 08, 2022, 08:49:58 pm ---
--- 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.
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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.
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My parents used to have one of those. It was given to them by British Gas. I didn't take it apart but the rainbow effect was visible, when an object is moved across it very quickly. I suppose it's cheap and uses less battery power, than a TFT. The new one uses a TFT though.
I wonder if there are any scopemeters which use these sorts of displays? The longer battery life might outweigh being limited to only 8 colours.
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