Liquid crystal display device

A liquid crystal display device, comprising:

• a liquid crystal cell and a backlight module, wherein the liquid crystal cell is disposed on the backlight module, and the backlight module is configured to provide a light source;
• wherein the liquid crystal cell comprises a color filter, an array substrate, a liquid crystal layer, an upper polarizer, and a lower polarizer, the color filter is opposed to the array substrate, the liquid crystal layer is disposed between the color filter and the array substrate, the upper polarizer is attached to the color filter, and the lower polarizer is attached to the array substrate;
• the color filter comprises a glass substrate, a plurality of black matrixes, and a plurality of color blocks, the black matrixes are disposed on the glass substrate, the color blocks are disposed on the glass substrate, and the color blocks and the black matrixes are alternately arranged with each other;
• and
• wherein the color blocks are doped with infrared quantum dots, the array substrate comprises a plurality of infrared sensing layers, the infrared sensing layers are located within corresponding shielding areas of the array substrate on which the black matrixes project, the infrared sensing layers are configured to transmit at least one signal to a sensor chip, the infrared sensing layers are arranged along and located at a first side edge of the shielding area, and the first side edge of the shielding area is adjacent to the corresponding color blocks.