Patent ID: 8638411
Filing Date: 2014-01-28
Classification: G02B,G02F

Abstract:
1. A transparent liquid crystal display device, comprising: a liquid crystal panel; a light guide plate disposed at a lower portion of the liquid crystal panel, the light guide plate including: a light source facing to the third surface of the light guide plate to supply the light to the light guide plate through the third surface thereof; a first polarizing plate between the third surface of the light guide plate and the light source to polarize the light supplied to the light guide plate; a second polarizing plate disposed at an upper portion of the liquid crystal panel to control the amount of the polarized light transmitting the liquid crystal panel; and a first positive A-film disposed at a lower portion of the liquid crystal panel to change the polarized state of the light supplying to the liquid crystal panel through the light guide plate, the horizontal direction phase difference value (Re) of the first positive A-film being approximately 100-150 nm, wherein an optical axis of the first polarizing plate is perpendicular to an optical axis of the second polarizing plate, wherein the light from the light source is polarized by the first polarizing plate such that the polarized light is incident to the light guide plate through the third surface thereof to supply to the liquid crystal panel in order to display an image, and wherein a non-polarized natural light is incident to the light guide plate through the second surface thereof to supply to the liquid crystal panel in order to display the image of the object at a rear portion of the light guide plate.