The silence if deafening! 10 days and NOTHING! This is ridiculous. This fabulous set deserves better. I still love mine so I thought I would dig around and find something useful and interesting to report on - And........here it is!
Sharp uses 300 Hz PWM to control backlighting. At anything less than full brightness Sharp strobes the back-lighting at 300 times per second to adjust overall brightness. This method is very common with both CCFL and LED displays. I found out about it here:
This is a great site to go to if you want to learn all about the different types of LCD displays and how the majority of computer monitors fare in their very comprehensive tests.
So, I followed their advice and took some pictures with my Sony A55 at 1/15 sec while scanning rapidly across the screen which was displaying ONE thin white line. 20 of them showed up so easy math tells you that the screen is being strobed 300 times per second. I am not aware of any downside to this but some people may be sensitive to strobed light. I certainly was aware of it with our company DLP projector with its rainbow artifacts.
The first picture is with -3 back-lighting and the 2nd on is with +12 back-lighting.