General > General Technical Chat

An expensive TV is a poor investment, and people spend FAR too much on them

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TimFox:
In non-foolish audio, the usual threshold for concern is 1 dB, which is a power increment of 26%.
In critical color photography, the usual threshold for concern is 1/3 stop, which corresponds to 1 dB in optical power, or 26% again.
If you tell a 10-year-old kid to turn down the volume, he will turn it down by 1 dB.

PlainName:

--- Quote --- How in the world can you equate a 40% measurable photograph-able difference to a 0% measurable actual difference of the audio foolery BS.
--- End quote ---

You are missing my point where I said "the criteria is whether it is good to watch". Clearly, if the picture is as bad as you show then it ISN'T good to watch. How hard is that to grasp?

You were complaining earlier that the nice-to-watch stuff (like the Sony make-it-up-so-it's-smooth thing and the white's being too white or something) is bad because it's not 'true to the original' and that kind of thing. Who the hell cares? Did I enjoy watching it <-- that should be the criteria unless you've got OCD about technology.

tooki:

--- Quote from: BrianHG on February 07, 2022, 02:27:18 pm ---
--- Quote from: tooki on February 07, 2022, 11:41:09 am ---
--- Quote from: BrianHG on February 07, 2022, 12:42:24 am ---
--- Quote from: tooki on February 06, 2022, 02:47:01 pm ---
--- Quote from: BrianHG on February 06, 2022, 12:49:33 pm ---Warning, QD-OLED has just hit the market.

Unlike OLED, true pure colors (no stupid white pixels to boost OLED's weak brightness), 3 year no-burn in guarantee, brighter overall white level and also already available in desktop PC monitors.

--- End quote ---
Adding the white subpixel isn’t stupid, it’s smart. Any time you have all three RGB subpixels lit simultaneously, the “common” brightness level is just white. (E.g. if the RGB levels are 230/175/60, then you can subtract 60 from all of them and instead run the white subpixel at the equivalent brightness of 60/60/60, sparing the blue subpixel some wear.)

Mind you that like plasma, OLED really isn’t intended for high ambient light environments; LCD is better for that. But in ordinary household light levels they’re totally fine.

--- End quote ---
LOL... Right... OK....

--- End quote ---
Why don’t you actually explain why you disagree instead of just a dismissive smirk?

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    What if you want 100% red.  Or 100% Green, or 100% blue, or 100% yellow, or 100% cyan, or 100% magenta.  You wasted surface area of each pure color pixel for white loosing the maximum possible color saturation brightness.  1 chip DLP projectors did the same thing when they went from the first original RGB color wheel filters in the early 2000s to the newer ones with a transparent and yellow portions of the newer color wheel to get brighter whites known as 'Brilliant Color'.  It messes up the natural colors through processing to achieve a stronger brightness, but false color rusty looking image wherever there supposed to be rich skin tones and rich greens and blues look dark.  The side-by-side photographs of OLED vs QD-OLED from CES shows this exact same color limitation errors.  Disabling the 'Brilliant Color' on those 1 chip DLP projectors fixes the color to it's proper levels, but with that color wheel having that dumb white and yellow sections now not in use, you get a net loss of around 40% brightness where as if they kept the original full RGB color wheels, this would have only been around a 20% loss of brightness, but true color.
    Take a zoomed up magnification look at the RGBW OLED screens.  The white pixels are the largest ones wasting the potential output capability of the much tinier red/green/blue which must now fit in the remaining available space.
    If the 'white' was such a good idea, then the same would have been done with every LCD screens and even old CRTs which would have been manufactured with 4 guns and 4 types of phosphor, RGBW, to get those brighter whites.  The white is a cheap countermeasure fix hoping that people don't know what the original image supposed to look like and without a reference monitor side-by-side, you know tricks are being made to fool you into thinking what you have is correct and king when the colors are actually all wrong.  Never accept backup correction countermeasures for the true thing as those tricks always fail to give the true representation whenever compared to the original source unless your source image doesn't exceed a combination of 40-50% color saturation+brightness drive.

--- End quote ---
There have been LCDs with subpixels beyond RGB, notably Sharp’s Quattron which added yellow. Single-chip DLP projectors all use multicolor filter wheels, including very high end ones.

Why wasn’t this widespread in the past? Cost. It takes a lot of image computation to separate out to more colors, and in the days of CRTs that would have been a ton of cost for little reward. LCD doesn’t need that help because it can achieve more brightness simply by using a beefier backlight. OLED lifespan being limited by the blue subpixel lifespan, it makes a ton of sense to relieve it as much as possible. Additionally, it gives the ability to have a truer white than RGB “white” can achieve.

You seem to be a sort of image purist (based on this and your comment about motion interpolation), but that requires ignoring that photography and videography are inherently interpretations of reality, not a theoretically “authentic” rendition.

BrianHG:

--- Quote from: tooki on February 07, 2022, 07:07:37 pm ---Why wasn’t this widespread in the past? Cost. It takes a lot of image computation to separate out to more colors, and in the days of CRTs that would have been a ton of cost for little reward.

--- End quote ---
Computation? To get a boosting white channel beyond the RGB, you would use 3 appropriate resistors plus a driver amp.  Hello, analog world...
Yes, mechanically, a 4 point aperture grill and phosphor coating will be the bulk of the cost.

tooki:

--- Quote from: BrianHG on February 07, 2022, 09:20:05 pm ---
--- Quote from: tooki on February 07, 2022, 07:07:37 pm ---Why wasn’t this widespread in the past? Cost. It takes a lot of image computation to separate out to more colors, and in the days of CRTs that would have been a ton of cost for little reward.

--- End quote ---
Computation? To get a boosting white channel beyond the RGB, you would use 3 appropriate resistors plus a driver amp.  Hello, analog world...
Yes, mechanically, a 4 point aperture grill and phosphor coating will be the bulk of the cost.

--- End quote ---
It’s not a boost, dude.  :palm: It’s replacing the white component of the RGB channels. That’a a dynamic subtractive process.

And you do realize that computation can be analog? (Just like the YUV->RGB transform done in analog color TVs.) I never said it had to be digital.

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