General > General Technical Chat

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

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tooki:
P.S. Take a look at the HSB color model. Replacing part of the RGB with white is sorta like considering the B component of a color and pushing that alone onto the white subpixel.

G0HZU:
I'm still watching an old Pioneer Kuro plasma that I purchased new in 2009. These were the last of their kind and the image quality can be really good with plasma. It also has its limitations so I've always yearned for something better when it finally dies.

I expect I'll buy a decent OLED model to replace it and this will probably cost more than I paid for the Pioneer plasma in 2009. I'd happily pay double if I get a significant improvement compared to the (flawed but still impressive) plasma image quality.

tom66:

--- Quote from: tooki on February 07, 2022, 09:39:58 pm ---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.

--- End quote ---

If R+G+B = W, and the colour balance of the white pixel is set such that the output of the white pixel equals the sum of three equivalent RGB pixels at similar luminosity, I can't see why it would change anything about the colour balance.  All of this colour mixing nonsense just sounds like "videophoolery".  Our eyes have three cones, and the red and green cones sense very similar wavelengths.  What we see is going to be limited to that - so why would using a colour model that is different create such a vastly different experience?

Talking about weird displays (Quattron was weird!)   Samsung demonstrated a plasma back in (2010?) that used a white pixel.    As far as I know it never reached production but we did see a weird PenTile matrix plasma as one of their last: the PN60F5300.  Widely regarded as one of the strangest plasma displays ever produced, because all prior PDPs had been RGB vertical striped.  There was much speculation on why this was done, but the likely reason was just cost (reducing the number of 60V driver ICs that are embedded in the panel surely helps), though it may also have increased brightness somewhat too.

Someone:

--- Quote from: tom66 on February 07, 2022, 11:29:23 pm ---
--- Quote from: tooki on February 07, 2022, 09:39:58 pm ---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.

--- End quote ---

If R+G+B = W, and the colour balance of the white pixel is set such that the output of the white pixel equals the sum of three equivalent RGB pixels at similar luminosity, I can't see why it would change anything about the colour balance.  All of this colour mixing nonsense just sounds like "videophoolery".  Our eyes have three cones, and the red and green cones sense very similar wavelengths.  What we see is going to be limited to that - so why would using a colour model that is different create such a vastly different experience?
--- End quote ---
Because some manufacturers were tempted by marketing specs, so instead of just using W (or some other additional component beyond RGB) to maintain the same luminance range, they would turn every channel on hard to get a higher peak brightness. Which has a limited gamut in those brighter regions....

...at which point you head away from linear color theory and need to consider perceptual colors, which arent as well agreed upon.

TV/Video capture chains are already working inside a synthetic gamut, which is why mono chromatic LED lighting can look so bad/wrong in images. Chopping out some of the possible color gamut for more brightness was a trade off plenty of consumers were happy to go with.

NiHaoMike:
There exist color LCD displays that have no color filters and instead use a backlight that rapidly switches between the 3 primary colors. It hasn't caught on due to the difficulty of making a LCD fast enough for that to work well, the main niche it had limited success in are ebook oriented tablets that can also display color. In principle, such a display can switch between any combination of the 3 colors at any time, but the power use of the DSP needed to coordinate it all would likely cancel out the power savings.

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