Patent ID: 9128338
Filing Date: 2015-09-08
Classification: G02F,H01L

Abstract:
1. A display apparatus for controlling optical transmissivity, the display apparatus comprising: a transparent display device, the transparent display device including a pixel divided into a first region for emitting light and a second region adjacent to the first region for transmitting external light therethrough; a first polarizer on a first surface of the transparent display device, the first polarizer being configured to linearly polarize the external light and to transmit the linearly polarized light therethrough; a first retarder between the first polarizer and the first surface of the transparent display device, the first retarder being configured to delay a phase of the external light and to transmit the phase-delayed light therethrough; a second polarizer on a second surface of the transparent display device, the first and second surfaces of the transparent display device being opposite to each other, and the second polarizer being configured to linearly polarize the external light and to transmit the linearly polarized light therethough; and a conversion retarder between the second polarizer and the second surface of the transparent display device, the conversion retarder being configured to delay a wavelength of the external light within a range from a first phase to a second phase according to power supplied to the conversion retarder and to transmit the wavelength-delayed light therethrough, wherein the pixel includes: