Abstract:
A red light-emitting layer (11), a green light-emitting layer (12) and a blue light-emitting layer (13) are arranged in this order between an anode (3) and a cathode (5), and an intermediate layer (a) composed of an organic material is disposed between the green light-emitting layer (12) and the blue light-emitting layer (13). The HOMO-LUMO energy gap of the intermediate layer (a) is larger than the HOMO-LUMO energy gap of a green light-emitting material constituting the green light-emitting layer (12). The intermediate layer (a) has hole transport properties. A display using this organic EL device (1) is provided with a color filter on the light taking-out surface side. By having such a structure, the organic EL device is capable to produce well-balanced, high luminance three color components, namely red, green and blue emission, which are suitable for a full color display.
Abstract:
A display unit capable of being simply designed and manufactured by using more simplified light emitting device structure while capable of high definition display and display with superior color reproducibility and a manufacturing method thereof are provided. The display unit is a display unit (1), wherein a plurality of organic EL devices (3B), (3G), and (3R), in which a function layer (6) including a light emitting layer (11) is sandwiched between a lower electrode (4) made of a light reflective material and a semi-transmissive upper electrode (7), and which has a resonator structure in which light h emitted in the light emitting layer (11) is resonated using a space between the lower electrode (4) and the upper electrode (7) as a resonant section (15) and is extracted from the upper electrode (7) side are arranged on a substrate (2). In the respective organic EL devices (3B), (3G), and (3R), the function layer (6) is made of an identical layer, and an optical distance L of the resonant section (15) is set to a value different from each other so that blue, green, or red wavelength region is resonated.
Abstract:
A red light-emitting layer (11), a green light-emitting layer (12) and a blue light-emitting layer (13) are arranged in this order between an anode (3) and a cathode (5), and an intermediate layer (a) composed of an organic material is disposed between the green light-emitting layer (12) and the blue light-emitting layer (13). The HOMO-LUMO energy gap of the intermediate layer (a) is larger than the HOMO-LUMO energy gap of a green light-emitting material constituting the green light-emitting layer (12). The intermediate layer (a) has hole transport properties. A display using this organic EL device (1) is provided with a color filter on the light taking-out surface side. By having such a structure, the organic EL device is capable to produce well-balanced, high luminance three color components, namely red, green and blue emission, which are suitable for a full color display.
Abstract:
PROBLEM TO BE SOLVED: To provide a light-emitting element having a constitution and a construction without a short circuit between a first and a second electrodes never occurs even if particles (a foreign substance) or a protruded part exists on the electrode, and reducing a driving voltage. SOLUTION: The light-emitting element is constructed by laminating the first electrode 21, an organic layer 23 with a light-emitting layer composed of an organic light-emitting material, a translucent reflecting film 40, a resistive layer 50, and the second electrode 22, in that order. The first electrode 21 reflects the light from the light-emitting layer, and the second electrode 22 transmits the light from the light-emitting layer, and the translucent reflecting film 40 is composed of a laminated structure of a first translucent reflecting film 41 and a second translucent reflecting film 42, from an organic layer side, with a mean film thickness of the translucent reflecting film 40 on the organic layer of 1 nm to 6 nm. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electroluminescent element capable of improving luminous efficiency in an upper face luminescent type structure using a lower electrode of high reflection factor, and its manufacturing method. SOLUTION: The organic electroluminescent element EL has a lower electrode 11, a light-emitting functional layer 15 including an organic light-emitting layer 15c, and an upper electrode 17 laminated in this order on a substrate 2, and takes out light generated in the organic light-emitting layer 15c from the upper electrode 17 side. The lower electrode 11 is constructed of a reflection material layer 11a composed using a metal material, an oxide film 11b installed on this surface, and a metal thin film 11c that covers the reflection material layer 11a installed with the oxide film 11b. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electroluminescent element in which emission light having high color purity can be taken out while detecting light with high sensitivity. SOLUTION: An organic layer 13 consisting of a hole transport layer 13a, a photodetection layer 13b, an electron block layer (charge block layer) 13c, an emission layer 13d, and an electron transport layer 13e formed sequentially from the first electrode (anode) 12 side is sandwiched between the first electrode (anode) 12 and a second electrode (cathode) 14 of an organic electroluminescent element 11. The electron block layer 13c prevents sequential bias charges (electrons) being fed from the second electrode (cathode) 14 from reaching the photodetection layer 13b and has trasportability of sequential bias charges (holes) being fed from the first electrode (anode) 12. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an organic EL display device capable of surely preventing deterioration of a part of an upper electrode which connects a part of the upper electrode on a laminated structural body with a part of the upper electrode on an auxiliary wiring. SOLUTION: The organic EL display device includes a plurality of organic EL elements each equipped with (A) a lower electrode 21, (B) an insulation layer 24 with an opening 26, (C) an auxiliary wiring 45, (D) a laminated structural body 43, and (E) an upper electrode. A part of the upper electrode 42 placed upward of the auxiliary wiring 45 comprises a charge injection layer and a charge transport layer from below, and is electrically connected with the auxiliary wiring 45. The laminated structural body 43 includes a part in contact with an auxiliary wiring 25. The insulation layer 24 and the auxiliary wirings are provided commonly for the plurality of organic EL elements. The upper electrode covers an entire surface of the auxiliary wirings and the laminated structural body structuring the plurality of organic EL elements. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a display device which has a resonator structure, and is structured to further improve light extraction efficiency. SOLUTION: The display device includes: (A) a plurality of light-emitting elements 10 which is composed of a lamination consisting of a first electrode 21, an organic layer 23, and a second electrode 22, and causes light emitted from a light-emitting layer 23 to resonate between the first electrode 21 and the second electrode 22 to emit light from the second electrode 22; and (B) a transparent upper substrate 33 fixed above the second electrode 22. When the distance from the maximum emission position of the light-emitting layer 23 to a first interface is L 1 , an optical distance is OL 1 , the distance from the maximum emission position of the light-emitting layer 23 to a second interface is L 2 , an optical distance is OL 2 , and m 1 and m 2 are integers, these satisfy a given equation. A light reflecting portion 40 is formed on the transparent upper substrate 33. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a display device capable of improving color reproducibility, reducing power consumption and extending service life, to provide a driving method thereof, and to provide an electronic apparatus using the display device. SOLUTION: The display device has a red pixel a(R) provided with a red light-emitting element EL(r), a green pixel a(G) provided with a green light-emitting element EL(g), and two blue pixels a(B) and a(Db) provided with blue light-emitting elements EL(b) having the same structures. At least the deep blue pixel a(Db), between the two blue pixels a(B) and a(Db), is provided with a color filter 33(Db) on a light guide-out side, so blue light beams h(B) and h(Db) having different (y) values in an xy chromaticity coordinate system are produced by the blue pixels a(B) and a(Db). COPYRIGHT: (C)2008,JPO&INPIT