A liquid crystal display device comprises a backlight module and a liquid crystal display module in a light emitting path of the backlight module. The liquid crystal display module includes a first conductive substrate facing the backlight module, a second conductive substrate spaced apart from the first conductive substrate, and a liquid crystal layer sandwiched between the first conductive substrate and the second conductive substrate. The second conductive substrate includes a transparent substrate, a color filter layer formed on the transparent substrate, and a light converting layer formed on the color filter layer, and a transparent conductive layer formed on the light converting layer.