Patent ID: 8421959

Claim:
A see-through, display device comprising: a liquid crystal plate filled with liquid crystals; first and second orientation plates respectively positioned on upper and lower surfaces of the liquid crystal plate, and controlling an initial alignment state of the liquid crystals; first and second conductive plates respectively positioned on an upper surface of the first orientation plate and a lower surface of the second orientation plate, and being filled with a conductive material; first and second transparent plates respectively positioned on an upper surface of the first conductive plate and a lower surface of the second conductive plate; first and second polarizing plates respectively positioned on an upper surface of the first transparent plate and a lower surface of the second transparent plate; a transparent light guide plate spaced apart from a lower surface of the second polarizing plate; and a light source positioned adjacent a side edge of the transparent light guide plate; the transparent light guide plate allowing beams generated by the light source incident from the side edge to be totally reflected and emitted upward; and the see-through display device being optically transparent so that a background at a rear of the see-through display device can be observed from a front of the see-through display device.