The present invention provides a liquid crystal display device in which increase in manufacturing costs is minimized and the utilization rate of illumination light emitted by a backlight source is also improved.A pixel electrode is formed at the intersection of each signal line and each gate line on the liquid-crystal-layer side of a first transparent substrate. A color filter is provided for each pixel electrode on the liquid-crystal-layer side of a second transparent substrate. A dichroic half mirror is provided for each of the color filters.