Patent ID: 8063558

Claim:
A multi-color display apparatus comprising: organic light-emitting devices for emitting lights of at least three colors of red, blue and green, respectively, each of the devices comprising an anode including a metal layer for reflecting light, a carrier transport layer contacting the anode, a light-emitting layer contacting the carrier transport layer, and a cathode for transmitting light, wherein each of the devices further comprises a reflection plane on a surface of the metal layer of the anode; wherein the carrier transport property of the light-emitting layer of each of the devices is electron transport property; wherein an optical distance l R between the reflection plane and an interface of the light-emitting layer on the anode of the red light-emitting device is within a range expressed by 0.25λ R ×(2n−φ/π−0.7)<l R <0.25λ R ×(2n−φ/π−0.5) where λ R indicates an emission wavelength in the light-emitting layer of the red light-emitting device, n indicates a positive integer, and φ indicates a phase shift on the anode; wherein an optical distance l G ; between the reflection plane and an interface of the light-emitting layer on the anode of the green light-emitting device is within a range expressed by 0.25λ G ×(2n−φ/π−0.6)<l G <0.25λ G ×(2n−φ/π−0.4) where λ G indicates an emission wavelength in the light-emitting layer of the green light-emitting device, n indicates the positive integer, and φ indicates the phase shift on the anode; and wherein an optical distance l B between the reflection plane and an interface of the light-emitting layer on the anode of the blue light-emitting device is within a range expressed by 0.25λ B ×(2n−φ/π−0.5)<l B <0.25λ B ×(2n−φ/π−0.3) where λ B indicates an emission wavelength in the light-emitting layer of the blue light-emitting device, n indicates the positive integer, and φ indicates the phase shift on the anode.