Här finns lite mer information om TN och andra LCD-typer:
http://en.wikipedia.org/wiki/TFT_LCD
Så här står det på Wikipedia:
The TN display suffers from limited viewing angles, especially in the vertical direction, and most are unable to display the full 16.7 million colors (24-bit truecolor) available from modern graphics cards.
These particular panels, with 6 bits per color channel as opposed to 8, can approach 24-bit color using a dithering method which combines adjacent pixels to simulate the desired shade.
They can also use FRC (Frame Rate Control), the less conspicuous of the two. FRC quickly cycles pixels over time to simulate a given shade. These color simulation methods are noticeable to most people and discomforting for some. FRC tends to be most noticeable in darker tones. Dithering has the tendency to appear as if the individual pixels of the LCD were actually visible.
Overall, color reproduction and linearity on TN panels is poor.
