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Originally Posted by nighthawkx
Mr. Wonderful, only TN panels(the cheapest ones) are incapable of displaying full color, SIPS and MVA/PVA can display full color.
Only thing that kills LCDs to me would be the low refresh rate.
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No, most have trouble getting to that standard due to lack of contrast and the backlighting. I've scoured TV specs for two and a half years now, and have seen it listed in the specs on many occasions. I can't find a specific spec sheet for you at the moment, but
hover over video and click CCFL here to get the idea.
More Information.
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Liquid crystal display (LCD) screens filter the light emitted by a backlight. The gamut of an LCD screen is therefore limited to the emitted spectrum of the backlight. Typical LCD screens use fluorescent bulbs for backlights. LCD Screens with certain LED backlights yield a more comprehensive gamut than CRTs.
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Television uses a CRT display (usually), but does not take full advantage of its color display properties, due to the limitations of broadcasting. HDTV is far better, but still somewhat less than, for example, computer displays using the same display technology.
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You're probably thinking along the idea of computer colors. As you said, all but the very cheap LCDs can do 8-bit per channel color (24-bit). But...
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It is not uncommon for displays with CCFL (Cold Cathode Fluorescent Lamps) based lighting to range from 40% to 76% of the NTSC color gamut, whereas displays utilizing white LED backlights may extend past 100% of the NTSC color gamut - a difference quite perceivable by the human eye.
The number of bits (6 or 8) is often emphasized, but with LCD displays, the transmittance of a pixel is typically not linear with the applied voltage[1], and even if it were, the sRGB standard for computer monitors requires a specific nonlinear dependence of the amount of emitted light as a function of the RGB value. From the curve in Ref. [1] it can be derived that especially for accurate display of low (dark) RGB values even an 8-bit D-A converter is not sufficient to display 8 bits per color channel with sufficient resolution without dithering.
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Sometimes the TV can accept the colors, but when it comes to the actual colors on screen, things like the backlighting can get in the way.
And I agree about the LCD refresh rates. Though I don't notice the flicker that I do when a CRT monitor is set to 60hz, it still is terribly low. For TV and console gaming it can be acceptable, but for other uses, it can really get in the way.