Originally Posted by Airion
Isn't there some setting to increase the intensity of the backlight? Just turn that up if possible.
If you have your TV set for maximum brightness for 2D viewing you can't make it brighter for 3D.
What I do here is calibrate my 2D viewing for a comfortable brightness level. Then in 3D mode I have that boosted to a level where my 2D and 3D are identical. This works for movies that are produced with similar lighting. Some movies are just darker by design. The best way to calibrate this special setting is to use a movie that you own both a 2D and 3D disk and then adjust your screen for equal brightness on both the 2D and 3D, save those settings to a memory.
Now if your screen is too dark already with maximum brightness, you might need to consider a higher quality TV. My projector is so bright in maximum settings for 2D that it would cause headaches so making the matched brightness is not difficult to do.