Abstract: A display device including: a first substrate; a transflective layer disposed on a surface of the first substrate; a wavelength conversion layer disposed on the transflective layer; a capping layer disposed on the wavelength conversion layer, a first polarizing layer disposed on the capping layer; and a second polarizing layer disposed on the other surface of the first substrate. The first polarizing layer and the second polarizing layer have different polarization directions.

Abstract: The present invention relates, in general, to an air supply device, which supplies fresh atmospheric air to an air conditioning system, such as an air purifier, an air conditioner, a heater and/or a cooler that is installed in a ceiling of a building. More particularly, the present invention relates to an air supply device, which includes an air supply pipe having a double pipe structure and constituting a passage for guiding atmospheric air to the air conditioning system. Described in detail, the present invention provides an air supply device, which includes an air inlet panel (3) mounted on an outer wall (1) of a building, and an air supply pipe (5) connected at a first end thereof to the air inlet panel (3) and connected at a second end thereof to an air conditioning system (4), such as an air purifier, an air conditioner, a heater and/or a cooler that is installed in a ceiling (2) of the building, thus supplying fresh atmospheric air to a room.