Patent ID: 9019448
Filing Date: 2015-04-28
Classification: G02B,G02F

Abstract:
1. A display apparatus comprising: a light guide plate to emit light that enters through a side surface of the light guide plate through an upper surface of the light guide plate; a light source arranged on at least one side of the light guide plate; a reflection plate arranged under the light guide plate; a color filter layer arranged above the light guide plate; and an optical shutter arranged above the color filter layer to transmit or block at least a part of light according to electric control, wherein the color filter layer comprises: a first color filter layer sequentially comprising a second reflection type color filter, a first reflection type color filter, and a third reflection type color filter; an optical switching layer arranged on the first color filter layer; and a second color filter layer arranged on the optical switching layer and sequentially comprising the first reflection type color filter, the third reflection type color filter, and the second reflection color filter, wherein the display apparatus is configured to switch between a transmission mode in which an image is formed by transmitting light provided by the light source and a reflection mode in which an image is formed by reflecting outdoor light, and the optical switching layer is configured to switch between a transparent state so that the display apparatus operates in the transmission mode by providing white light to the light guide plate and a black state so that the display apparatus operates in the reflection mode wherein the light source is turned off and no light is transmitted.