LAMINATED-TYPE LIGHT-EMITTING DISPLAY DEVICE

• Main Authors: KIMURA TOSHIHIDE, KOGORI MANABU
• Format: Patent
• Language: English
• Published: 04.11.2010
• Subjects: ADVERTISING; BASIC ELECTRIC ELEMENTS; CRYPTOGRAPHY; DISPLAY; DISPLAYING; EDUCATION; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; LABELS OR NAME-PLATES; PHYSICS; SEALS; SEMICONDUCTOR DEVICES; SIGNS

PROBLEM TO BE SOLVED: To provide a laminated-type light-emitting display device suppressing a fluctuation in chromaticity due to a fluctuation in film thickness, in a laminated element manufacturing process. SOLUTION: The device has a structure in which plural electrodes 30, 40, 50, 60 and EL (electroluminescent) layers 31, 41, 51 are laminated alternately. The device includes a reflecting surface for reflecting the light emitted from at least one EL layer on the outer side of a light-emitting layer of the outermost laminated EL layer 31 and a transparent thick film layer 21, formed such that the optical distance L from the reflecting surface to a reflecting surface side interface of a light-emitting layer radiating emitted light which is reflected from the reflection surface satisfies the conditional expression (1): 2L/λ+δ/2π≥8, where λ: a peak wavelength of taken out light, and δ: a phase shift amount of the reflection surface. COPYRIGHT: (C)2011,JPO&INPIT