Patent ID: 8129712

Claim:
An organic electroluminescent (EL) panel comprising: a first pixel; and an organic EL element disposed in the first pixel and selected from the group consisting of a red (R) light emitting organic EL element, a green (G) light emitting organic EL element, and a blue (B) light emitting organic EL element, wherein the organic EL element of the pixel has a multilayered structure including a luminous element layer having at least a light emitting function, disposed between a reflection film and a semi-transmissive film which are opposed to each other, the organic EL has a microcavity structure having a cavity length, representing an interlayer distance between the reflection film and the semi-transmissive film, which can enhance the light of a predetermined wavelength, and a first region within the organic EL element where the cavity length is a first length and a second region within the same organic EL element where the cavity length is a second length are included in the first pixel, and an area ratio of the region where the cavity length is the first length and the region where the cavity length is the second length is differentiated depending on the color of the light emitted from the first pixel; and the organic EL element comprises: a hole transporting layer; wherein a thickness of the hole transporting layer in the region where the cavity length is the first length is thicker than a thickness of the hole transporting layer in the region where the cavity length is the second length.