Just found this image... i would really call it misleading to sell it as a movie entertainment notebook, that 16.0" Acer:
http://www.notebookjournal.de/storage/s ... dd7289f915
Judging from the colors of the desk, i think it's a decent camera. But that LCD is just nothing but really horrible. Also, it doesn't look like it shows a wide range of colors at all, as suggested by the 60% chromaticity.
Oh, and let's not forget the splendid backlight leakage at the bottom, which really only Samsung can do. It's just not alright with a notebook meant for viewing movies in darkness.
Hehe, if you looked at desktop monitors from LG, some of them probably were IPS, especially their larger LCDs.
That's also another thing which is hard to judge - is the image neutral to what it ought to display?
With speakers, people generally think that louder music sounds better than softer music - this is a trick that is always used at "auditions" or tests where potential buyers attend.
The same with TVs/monitors - turn the contrast and brightness all the way up, and it's sure to be noticed first.
The 3000:1 spec is called contrast ratio. It is the ratio of luminance at full brightness with white pixels and black pixels.
If you see a 40000:1 ratio, either someones pulling your leg, or it is dynamic contrast, which is a little useless in practice. It's the ratio of luminance at full brightness with white pixels and black pixels at lowest brightness setting.
Chromaticity is a mathematical model describing how colors are perceived, and the purity of it. It relies on the fact that all colors can be generated by three primary colors: red, green, blue. Furthermore we perceive colors as a luminance (brightness) and a chrominance. Black and white has the same chrominance, but different amount of luminance. Think of chrominance for e.g. red as if it was red paint dissolved in water. The more red paint you dissolve into the water, the more red it will seem, regardless of the amount of ambient light.
The model describes these chromacities in a horse-shoe shaped chart. You can measure the chromaticity by measuring the emission of R G and B from any source which is afterwards weighted by a function called the color-matching function.
What you get from this "transformation" is the color primaries of what you wanted to measure, which can be plotted in the horseshoe shaped chart. When connecting the three data points for R, G, B it will form a triangle.
When something has a color gammut or chromaticity of 60% or 92%, it is with respect to a NTSC color space, which is just three other color primaries, defined by the NTSC standard that spans another triangle with another area. Usually, this standard is used due to the fact that the three points are far apart from each other, so that very vidid colors are defined. This is a standard from the broadcasting industry.
A 60% color gamut or chromaticity means that the area spanned by the color primaries for a particular LCD for example, equals 60% the area of the NTSC triangle.
The higher you get, the more vivid colors the LCD can show. But as it is digital, you can only tell the LCD to display a specific color range in certain steps. What this means is that if we use ten steps to display all the red levels/gamuts possible with a 40% NTSC gamut LCD, the difference between each step will be less than if we had to do the same experiment on a 92% NTSC gamut LCD for example. What this means is that you will see coarse steps between each color levels/gamuts. That doesn't look good.
Instead, we can increase the amount of steps taken to display all levels of red.
For a 6 bit lcd, which is typical with notebook lcds, the color gamut is typically around 45%. To go from red=off to red=fully on, there is merely 64 steps (2^6).
If you had a 60% or 72% LCD with 6 bit steps, that would be truely bad. That's why manufacturers use 8 bit (256 values) and 10 bit (1024 values) for desktop monitors.
This also explains why larger color gamut notebook LCDs with larger than 6 bit are never really used or put into production, due to power condumption and bandwidth.
Say you have a 1600x1200 LCD.
Each pixel consists of three subpixels. That's 5760000 pixels. Each subpixels can attain 6 bits of information. That is 368640000 different possibilities in total.
The LCDs always have a driver board with a processor to do a table lookup. This table consists of values to send to each coloumn and row driver, i.e. a binary code representing a voltage.
So it will have to do 5760000 lookups per refresh, which is typically 60 times per second.
If that takes one clock cycle, you could do that with a 345.6 MHz processor. Still, this is not what is quite done in practice i'm sure.
Having a higher bit-depth, say 8-bit requires a larger look-up table, which requires even more memory.
Eh... probably got to much into it now.
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They recently bought Gateway, if I'm not mistaken, or merged with them, or whatever, and they now have two models that are 18.4" WUXGA, but not 1920x1200, and instead 1920x1080, which is NATIVE 720p Bluray! A review of both models has revealed that the screen is supposedly top-notch. And I think I've come to the end of what else I can max my T60p out to.
Thanks guys!!
