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nit is industry shorthand for candela/square meter, a unit of brightness. As far as I'm aware that's all, it doesn't refer to a specific method of measuring brightness.
Backlight brightness is easy to create. You can easily stick in a 2000cd/m² light behind a TV. You can buy a torch that bright for under a tenner. Getting that light with a good colour gamut and so on makes it a bit more high tech, but it's not the limiting factor.
The tricky bit is increasing the contrast sufficient to apply that brightness in actual scenes. This requires control over the backlight brightness in small enough areas (zones) that the extra brightness can be applied to the small bright spots on screen that are requesting it, such as light sources or glints of sunlight on polished metal.
If you can't do that it's only going to get used on rare occasions for shock value. Strobes, explosions, dawn and so on.
In short, the only brightness values with any meaning are real scene measurements. |
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