Organic light emitting diode display and method for manufacturing the same
View Patent ↗An organic light emitting device including a first pixel, a second pixel and a third pixel displaying different colors from each other according to the present invention, the organic light emitting device includes a reflecting electrode and a translucent member forming a micro-cavity along with the reflecting electrode, wherein a optical path length is an interval between the reflecting electrode and the translucent member, and wherein the light path lengths of at least two pixels among the first pixel, the second pixel and the third pixel are the same.
1. An organic light emitting diode (OLED) display comprising a first pixel, a second pixel and a third pixel displaying different colors from each other, the OLED display comprises:
a substrate;
a reflecting electrode on the substrate; and
a translucent member forming a micro-cavity along with the reflecting electrode,
wherein an optical path length is a gap between the reflecting electrode and the translucent member,
wherein the first pixel is a green pixel, the second pixel is a blue pixel, and the third pixel is a red pixel,
wherein optical path lengths of the first pixel and the second pixel are the same, and
wherein the optical path length of the first pixel is greater than an optical path length of the third pixel.
2. The OLED display of claim 1 , further comprising
a transparent member disposed between the reflecting electrode and the translucent member, and the transparent member is formed in a portion of at least one pixel among the first pixel, the second pixel and the third pixel.
3. The OLED display of claim 2 , wherein
the translucent member includes silver or aluminum, and
the transparent member includes ITO or IZO.
4. The OLED display of claim 2 , wherein
the transparent member is formed in the first pixel the second pixel and not in the third pixel.
5. The OLED display of claim 1 , wherein
the optical path length L 2 of the third pixel satisfies L 2 ≈mλ 3 /2 and
the optical path length L 1 of the first pixel and the second pixel satisfies L 1 ≈(m+1)λ 1 /2≈(m+2)λ 2 /2,
where m is a natural number, λ 1 is a wavelength of the green region, λ 2 is a wavelength of the blue region, and λ 3 is a wavelength of the red region.
6. The OLED display of claim 1 , further comprising
a white pixel,
wherein the translucent member is absent in the white pixel.
7. The OLED display of claim 1 , wherein
the first pixel, the second pixel and the third pixel include a corresponding color filter.
8. The OLED display of claim 7 , further comprising
an emission layer disposed between the reflecting electrode and the translucent member, and the emission layer includes a plurality of sub-emission layers emitting light of different wavelengths and emits a white light by combining the light of the different wavelengths.