The various settings of course produce a change. But HOW is the changed made? Well there's no physical alterations of white point available on CCFL LCDs. The native white point is what it is. You can alter this by altering a color lookup table, most displays are doing so in 8-bits which just introduces banding. With such displays, far better to profile this native behavior, not alter it (let the CMS do this). On higher end units, high bit adjustments are conducted in the panel, high bit. So you're not forced into using a Native white point.
No, no really - LCD displays are fundamentally very simple devices - the amount of light transmitted is controlled by the voltage on a pixel. So, simplistically 0 volts = black, 1 Volt = all light transmitted. The 8-bit signal (or more bits in high end displays) just divides that up proportionally, e.g., 0 = 0V, 255= 1 Volt.
When you change the whitepoint of the display, you're changing the voltage that equals 255. So, e.g.,
1. a 9500 whitepoint may mean: Red max voltage = 0.8V, Green max voltage = 1V, Blue max voltage = 1V
1. a 6500 whitepoint may mean: Red max voltage = 0.9V, Green max voltage = 0.9V, Blue max voltage = 1V
Max voltage always equals 255 (in an 8 bit display).
There's no need for a LUT in this process. The display might, depending on how it works internally, use a LUT, but that's not a necessary part of the equation.
Note the above is vastly simplified - e.g., I've left out gamma, black levels, contrast controls, etc. Also most LCD panels (for technical reasons) internally work with 0V = white and max volts = black, etc, but the principle remains the same.
The one thing you need to avoid is setting the display to settings such that it is in saturation, e.g., voltages of above 1V in the example above. How you tell is easy - when you calibrate the panel, check that the transfer curve doesn't have a kink in it at the top or bottom.