Abstract: An organic electoroluminescent display device includes organic electroluminescent films, each containing organic electroluminescent materials and sandwiched by a pair of electrodes, each forming a plurality of light-emitting elements above a substrate. Each pixel of the display device is composed of two different colors light-emitting elements, and the chromaticity of each color is controlled by changing the concentration of organic electroluminescent materials or by adding foreign materials the reto. For example, if the chromaticity of the red light-emitting element is set to a value shifted toward green side, various colors including white can be produced by mixing this red with blue of the blue light-emitting element. Then, the organic electroluminescent display device can produce high-quality quasi-color images by mixing two colors of which chromaticity values are properly controlled. By virtue of a two-color structure, the aperture ratio becomes high and the manufacturing process becomes simple.

Abstract: An aging method applied to a display apparatus having light emitting devices arrayed, includes the steps of: setting integral driving time for the light emitting devices based on a property of luminance deterioration of the light emitting devices relative to the integral driving time so that the lowering of luminance per unit time is not larger than a set value; and driving and aging the light emitting devices only for the set integral driving time.

Abstract: An organic electroluminescence element is comprised of a laminate of an anode, a light emitting layer made of an organic compound including phosphorescent materials, an electron transport layer made of an organic compound, and a cathode In the electroluminescence element, a hole blocking layer made of a specific aluminium chelate complex is laminated between the light emitting layer and the electron transport layer.

Abstract: In a method of forming organic EL display, after ITO films 13 and TFT layers 14 are disposed on the transparent substrate 11 via an inter-layer insulating film 12, mask supporting layers 18 are disposed on the inter-layer insulating film 12, and the metal mask 19 of a predetermined pattern is overlaid on the transparent substrate 11 so as to be supported by the supporting layers 18. The organic EL thin film 16 and the cathode thin film 17 are deposited on the ITO films 13 through openings of the metal mask 19.

Abstract: A display panel using an organic electroluminescent material, includes: a substrate; a plurality of first type electrodes formed on the surface of one side of the substrate; a plurality of electrically insulating partition wall groups each including a plurality of partition walls, partially covering and partially exposing the first type electrodes; a plurality of organic electroluminescent layers formed on exposed portions of the first type electrodes; and a plurality of second type electrodes formed on the organic electroluminescent layers. In particular, each partition wall group has one or more internal spaces each formed between two adjacent partition walls.

Abstract: An organic electroluminescence element has a laminate of an anode, a hole injecting layer made of an organic compound and laminated in contact with said anode, a light emitting layer made of an organic compound, an electron transport layer made of an organic compound, and a cathode. The light emitting layer comprises of a carbasol compound as a main component and includes a iridium complex compound at a concentration of 0.5 wt % to 8 wt %.

Abstract: An organic electroluminescence element has a laminate of an anode, a hole injecting layer made of an organic compound and laminated, a light emitting layer made of an organic compound, an electron transport layer made of an organic compound, and a cathode. The light emitting layer includes a phosphorescent material. The hole injecting layer is made of a specific porphyrin compound.

Abstract: An organic electroluminescence element is comprised of a laminate of an anode, a light emitting layer made of an organic compound including phosphorescent materials, an electron transport layer made of an organic compound, and a cathode In the electroluminescence element, a hole blocking layer made of a specific aluminium chelate complex is laminated between the light emitting layer and the electron transport layer.

Abstract: An organic electroluminescence element is comprised of a laminate of an anode, a light emitting layer made of an organic compound, an electron transport layer made of an organic compound, and a cathode. In the electroluminescence element, a hole blocking layer made of an organic compound is laminated between the light emitting layer and the electron transport layer. The hole blocking layer is a mixed layer made of plural kinds of electron transport materials.

Abstract: An organic electroluminescence element comprised of a laminate of an anode, a light emitting layer made of an organic compound, a hole blocking layer made of an organic compound, an electron transport layer made of an organic compound, and a cathode. Additionally, the element has a mixed layer, between the light emitting layer and the hole blocking layer, including a material constituting the light emitting layer and a material constituting the hole blocking layer.

Abstract: An organic electroluminescent device comprises an anode, a positive-hole transport layer made of an organic compound, an emitting layer made of an organic compound, and a cathode which are layered in sequence, further comprising an electron-injecting layer containing at least one of alkaline earth metal oxides and disposed between the emitting layer and the cathode. This device emits light at a high luminance and a high efficiency upon application of a low voltage together with reduction of the decrement of luminance in the running of emitting light of the device. Selection scope for cathode materials is expanded because of the device is free from the restriction of a low work function for the cathode layer. The cathode can be made a transparent electrode such as ITO. Anode and cathode lines may be formed with low resistance material. As a result, emitting efficiency and life time of the device is improved.

Abstract: Disclosed are organic EL elements having high environmental stability as well as high luminous efficiency and luminance. In an organic EL element comprising a transparent anode, a hole-carrying layer, a light-emitting layer and an alloy cathode consisting of a first metal Li and a stabilizing second metal Al, all laminated on a substrate, the concentration of the first metal Li contained in the alloy region with a predetermined thickness from the interface between the alloy cathode and the organic layer is controlled to a minute amount ranging from 0.005 wt. % to 0.3 wt. %.

Abstract: An organic electroluminescent device comprises a cathode, an emitting layer of organic compound including a quinoline derivative, a positive-hole transport layer of organic compound and an anode which are laminated in sequence, further comprising a metal film having a work function equal to or lower than that of the anode and partially disposed between the anode and the positive-hole transport layer. This device achieves a high luminance efficiency per se. The existence of the metal film reduces resistance values of whole anodes. The entering efficiency of the positive-hole carrier is partially decreased due to the metal film line. This metal film line decreases the waste electric current that does not contribute the emission of the emitting layer.

Abstract: Disclosed is an organic electroluminescent display apparatus that has small panels each constituted by forming light-emitting sections, each comprising an organic electroluminescent layer, a transparent electrode and a metal electrode, on one major surface of the substrate. The transparent electrode has an extending portion formed to continuously extend from one major surface of the substrate to one side surface. The associated transparent electrodes of adjoining small panels are electrically connected via an anisotropic conductive sheet which has a conductivity only in the thickness direction. This design can narrow the non-light emitting area of each joint of the small panels.