Patent ID: 8842242

Claim:
A liquid crystal display comprising: a first electrode and a second electrode generating an electric field; liquid crystal molecules disposed between the first electrode and the second electrode and having an orientation state which is changed as a result of the generated electric field; and a photodetector sensing light passing through the liquid crystal molecules, wherein ambient light is incident into the liquid crystal molecules, and an ambient light shielding film is further disposed above the liquid crystal molecules for preventing the ambient light from being incident into the liquid crystal molecules, the ambient light shielding film including an opening formed to conform to a periphery of the photodetector, the liquid crystal display further comprising: a first polarizer disposed below the liquid crystal molecules; a reflecting sheet disposed below the first polarizer; and a second polarizer disposed above the ambient light shielding film, wherein the ambient light is incident from an upper side of the second polarizer, sequentially passes through the second polarizer, the liquid crystal molecules, and the first polarizer, and is then reflected at the reflecting sheet, and then passes through the first polarizer until it reaches the photodetector.