How does LCD display technology produce color displays?

An LCD is nothing more than a light valve that either allows light to go through the display or
blocks the light from passing. To create a full-color display, each pixel is actually divided into
three rectangular sub-pixels. When combined, these three sub-pixels are dimensionally similar
to a typical square pixel. These sub-pixels are then aligned perfectly with an RGB color filter
that is printed into the LCD cell itself. The color filter is a repeating pattern of Red-Green-Blue
columns, with each color the width of a single rectangular sub-pixel. The result is a display with
3x the original resolution. To obtain a wide range of color combinations, the gray shades of each sub pixels are used in combination to achieve the thousands of unique colors.