Patent ID: 8314902
Filing Date: 2012-11-20
Classification: G02B,G02F

Abstract:
1. A transparent display device, comprising: a liquid crystal display panel; a light source disposed at one side of a lower portion of the liquid crystal display panel to emit light; a first polarizing plate for polarizing the light emitted from the light source; a light guide plate disposed at a lower portion of the liquid crystal display panel to reflect totally the light polarized in an axis-direction by the first polarizing plate to a lateral surface of the light guide plate to supply the light into the liquid crystal display panel, and transmit natural light entered from a lower direction therethrough; a second polarizing plate disposed at an upper portion of the liquid crystal display panel to control the amount of polarized light passing through the liquid crystal display panel; and an optical sheet disposed at a lower portion of the light guide plate to change the polarized state of a first polarized light entered from the light guide plate and reflect the light, and transmit a second polarized component entered from the lower portion therethrough.