| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce irregularities at pixel parts as much as possible and suppress color mixture due to reflection from a vertical conduction part while maintaining high light extraction efficiency, in a top emission type light emitting device comprising a combination of a white organic EL element and a resonance structure. <P>SOLUTION: A light emitting device E1 has an optical structure in which an expression of D=ä(2πm+ϕ<SB POS="POST">L</SB>+ϕ<SB POS="POST">U</SB>)/4π}λ is satisfied, where D represents a distance between a reflective layer 12 and a counter electrode 22, ϕ<SB POS="POST">L</SB>represents a phase shift in reflection at the reflective layer 12, ϕ<SB POS="POST">U</SB>represents a phase shift in reflection at the counter electrode 22, λ represents a peak wavelength of a standing wave generated between the reflective layer 12 and the counter electrode 22, and m represents an integer of 2 or less. In the light emitting device E1, a length from an interface between a pixel electrode 15 and a vertical conduction part 330 to the counter electrode 22 is set to a value from the distance D at which a red peak wavelength can be obtained when m is equal to 0 in the expression to the distance D at which a blue peak wavelength can be obtained when m is equal to 1 in the expression. <P>COPYRIGHT: (C)2013,JPO&INPIT |
