LCD
Liquid crystal displays have traditionally been slow to change from one polarization state to another. Users of early 1990s laptops are familiar with the smearing and blurring that occurs when something moves too fast for the LCD to keep up. This smearing can result in a completely unviewable image when using shutter glasses.
LCD technology is not usually rated by frames per second but rather the time it takes to transition from darkness to brightness and back to darkness, in milliseconds. In order to achieve an equivalent minimum refresh rate of 120 Hz, an LCD must be able to transition at a speed of not more than 8.33 ms. However, each frame is displayed for at most 8.33 ms, and minimizing the response is key. For example: if it takes 8.33 ms for the LCD to transition to the desired image, and a sequential black/white image is shown, the 8.33 ms which should be displaying "white" will begin at black, and after 8.33 ms finally achieve white. Similarly, the next 8.33 ms which should be displaying "black" will begin as white, and after 8.33 ms finally achieve black.
However, because pixel transition speed has become a strong selling point of LCD monitors, marketing hype has unfortunately obscured these speed-of-transition specifications with what some consider tortuous qualifying statements that make inadequate technology appear to be better than it really is (see PMPO for another example of such marketing distortions). While the average person attempting to buy a high quality LCD for normal home use might not notice these minor performance differences, a slowly transitioning LCD can have a severely negative impact on usability with shutter glasses. For stereoscopic applications, it is important that the LCD be truly capable of what is being claimed.
Read more about this topic: Active Shutter 3D System, Hardware