Patent ID: 9116384
Filing Date: 2015-08-25
Classification: G02F

Abstract:
1. A display device comprising: a light source unit generating light; a display unit displaying an image using the light generated from the light source unit; and a display part displaying a symbol, the display part disposed on the display unit, wherein the symbol is determined based on a type of the light source unit, a driving method of the light source unit or a luminance generated from the light source unit, wherein the display unit comprises: a display panel changing a light transmissivity of liquid crystal; and an optical plate disposed on the display panel, the optical plate including first and second polarizing plates, wherein the display part is formed directly on the second polarizing plate of the optical plate, wherein the display part comprises an afterglow changing material emitting light based on external light projected onto the afterglow changing material, and wherein the afterglow changing material not emitting the light when the external light is removed or heat applied from outside has a temperature higher than a reference temperature, the afterglow changing material maintaining an afterglow for a predetermined time period when the heat has a temperature lower than the reference temperature.