Since death of Cathode Ray Tube (CRT) tv sets in 2007, probably the most prominent manufacturing method for televisions has been Liquid Crystal Display (LCD). LCD technology work by layering the display screen using a sheet of liquid crystal followed by shooting white light through small filter-shutters at it. The white light originates from a source of cold cathode fluorescent lamps at the back of the television and highly accurate calibrations of the shutter-filters are used to determine the hue of the light received by the liquid crystal. The shutter-filters operate in groups of three, one passing the red part of the light, another passing the blue part of the light and the last moving the green portion of the light (RGB). These three types of light are known as sub-pixels, and when viewed from even a close distance, blend together into one color, dependant upon the mix proportions of each colored light let through, to create a pixel.