An organic light emitting diode includes a display substrate assembly including an organic light emitting element; an encapsulation substrate assembly (210) disposed on the display substrate assembly (110) with a space therebetween and sealed with the display substrate assembly in a vacuum-tight manner; and a filling agent (300) filling the space between the display substrate assembly (110) and the encapsulation substrate assembly (210). The filling agent is adapted to selectively absorb external light entering through the encapsulation substrate assembly (210) and incident on the organic light emitting element as a function of wavelength in a wavelength band of the external light to control transmittance.
