Abstract: The present invention provides an organic EL device that can prevent an organic EL layer(s) from being damaged when the organic EL device is bent. An organic EL device (10) of the present invention includes: a first substrate (11); a second substrate (12); one or more organic EL elements; and a sealing layer (14). Each of the one or more organic EL elements includes an organic EL layer (13) and a pair of electrodes (16, 17). One surface of the first substrate (11) is a mounting surface on which the one or more organic EL elements are disposed. The first substrate (11) and the second substrate (12) are laminated in such a manner that the mounting surface of the first substrate (11) and one surface of the second substrate (12) face each other with the sealing layer (14) interposed therebetween.

Abstract: The present invention provides a novel organic EL panel adapted to be color tunable by a user, for example. An organic EL panel 10 of the present invention includes: a first substrate 11; a second substrate 12; an organic EL element 13; and a sealing layer 14. One surface of the first substrate 11 is a mounting surface on which the organic EL element 13 is disposed. The first substrate 11 and the second substrate 12 are laminated in such a manner that the mounting surface of the first substrate 11 and one surface of the second substrate 12 face each other with the sealing layer 14 interposed therebetween. The sealing layer 14 seals a gap between the first substrate 11 and the second substrate 12 along an entire periphery of a region where the first substrate 11 and the second substrate 12 face each other. The first substrate 11 includes a light incident section 15 on which laser light is incident and a light guide section 16 that directs the incident laser light in an in-plane direction.

Abstract: A light emitting element circuit includes a light emitting element (1), a current supply path to the light emitting element (1), a constant current circuit (2) that supplies a current to the light emitting element (1) via the current supply path, and an electric discharge path that discharges an electric charge accumulated at the light emitting element (1) and at a region connected between the both electrodes when the constant current circuit (2) stops a current supply to the light emitting element (1). A light emitting element failure detector (4) that detects a short-circuit of the light emitting element (1) in a light emitting element circuit includes a current instantaneous interruption circuit (5), a voltage detector (60), and a determiner (62).

Abstract: A light emitting element failure detector (4) includes a light emitting element (1), a constant current circuit (2) which supplies an electric current to the light emitting element (1), and an electric discharge path which discharges an electric charge such as the light emitting element (1). A light emitting element failure detector (4) further includes an instantaneous current interruption circuit (5) which instantaneously interrupts an electric current to the light emitting element (1) by a current supply path different from the electric discharge path, a diode (60), a DC power supply (61), and a current detector (62). The DC power supply (61) generates a direct-current reference voltage having a positive value lower than a voltage between the anode and cathode of the light emitting element (1) in a normal state. The DC power supply (61), the diode (60), and the current detector (62) which are connected in series constitute a parallel electric path of the light emitting element (1).

Abstract: An organic EL luminescent device (1) includes: organic EL panels of no smaller than 2 (10, 11) including a light-transmitting organic EL panel (10, 11), the light-transmitting organic EL panel having a first electrode (32), formed on a transparent substrate (31), having optical transparency, an organic layer (33), formed on the first electrode (32), having a light emitting layer and a second electrode (35), formed on the organic layer (33), having optical transparency; and a support (21) to support the no-smaller-than-2 organic EL panels in a manner overlapping each other.

Abstract: The present invention addresses the problem of providing an organic electroluminescent lighting device in which it is difficult for an organic light emitting film to be scratched.

Abstract: An organic EL light emitting device includes a transparent substrate, a transparent electrode film formed on the substrate, a positive electrode contact portion in contact with a part of the transparent electrode film and electrically connected therewith, an insulating layer formed on the transparent electrode film such that the an insulating layer covers a portion excluding a light emitting part, an organic light emitting layer formed on the transparent electrode film and on the insulating layer, a negative electrode film formed on the organic light emitting layer, a negative electrode contact portion in contact with at least a part of the negative electrode film and electrically connected therewith, and a protective layer for separating and electrically insulating the positive electrode contact portion and the transparent electrode film from the negative electrode contact portion.

Abstract: Anodes of a plurality of organic EL elements are connected together. A forward bias voltage relative to the potential of anodes and a reverse bias voltage are alternately applied to cathodes of the plurality of organic EL elements at a predetermined period. The ratio of the time for which the reverse bias voltage is applied and the time for which the forward bias voltage is applied is increased.

Abstract: In the organic EL illumination device including m (m is an integer greater than 1) series circuits each of which includes n (n is an integer greater than 1) organic EL panels connected in series, each of the organic EL panels is provided with one organic EL element, a positive electrode and a negative electrode, the m series circuits are connected in parallel between the positive electrode and the negative electrode, and among the organic EL panels in the m series circuits, the organic EL panels having the same place in series connections in the direction from the positive electrode to the negative electrode are connected with each other in parallel.

Abstract: An organic electroluminescent lighting device includes: a pair of rectangular electrode films stacked to face each other sandwiching an organic light-emitting element, and different from each other in polarity; wherein a first electrode film includes power supply terminal sections which are each of edge sides which face each other at a surface of the first electrode film; and auxiliary electrode film group including at least one of a plurality of first auxiliary electrode films and a plurality of second auxiliary electrode films located away from each other on the surface of the first electrode film. A sectional area viewed where the plurality of first auxiliary electrode films cuts perpendicularly to the edge sides increases relative to increasing distance from the edge sides. A sectional area viewed where the plurality of second auxiliary electrode films cuts parallel to the edge sides increases relative to increasing distance from the edge sides.

Abstract: This invention provides an organic EL light-emitting device, which can prevent the occurrence of brightness unevenness due to resistance of a transparent electrode, in a large surface light-emitting panel of an organic EL element. The organic EL light-emitting device includes an element formation substrate 1, on which an organic EL element 2 including an organic light-emitting layer is stacked, and a sealing substrate 3 for sealing the organic EL element so as to accommodate the organic EL element between the element formation substrate and the sealing substrate. A sealing portion 4 formed of an adhesive is formed in the peripheral edge portion between the element formation substrate 1 and the sealing substrate 3, and a grease layer 5 or a gel layer 5 is accommodated in between the element formation substrate, on which the organic EL element surrounded by the sealing portion is formed, and the plate-shaped sealing substrate so as to adhere to the element formation substrate and the sealing substrate.

Abstract: A light emitting device comprises a light emitting element disposed within a space surrounded by a reflective surface of a reflector disposed on a board. A lower portion of the reflector is placed within a recess formed in the board, and a side wall of the recess is interposed between the lower end of the reflective surface of the reflector and the light emitting element.

Abstract: Provided is a fluorescent lamp electrode, having excellent sputtering resistance and able to retain excellent dark-start characteristics over a long period of time when used as an electrode in a cold cathode fluorescent lamp, and which can be produced inexpensively. A fluorescent lamp of this invention has a prolonged life resulting from the use of said electrode. Said electrode is made by dispersing in a nickel or nickel alloy base one or more rare earth metals selected from among lanthanum, cerium, yttrium, samarium, praseodymium, niobium, europium and gadolinium in the form of a precipitated boride phase.

Abstract: A surface light-emitting element radiates light emitted to a side of a surface light-emitting device. The surface light-emitting device includes: a polygonal transparent substrate, and a light-emitting element disposed on one face of the transparent substrate. The light-emitting element is a laminated body including a transparent electrode which is positively charged and functions as an anode, a negative electrode which becomes negatively charged and functions as a cathode opposite the transparent electrode, and a light-emitting layer between the transparent electrode and a negative electrode. Lengths of respective sides and a thickness of the transparent substrate have a relationship that if b denotes the thickness of transparent substrate, dividing the lengths of the respective sides by 4b results in values ranging from 0.5 (inclusive) to 10 (inclusive).

Abstract: A translucent material substrate is shaped such that high luminous efficiency can be obtained in an organic EL light source in which light is emitted from a translucent material substrate to the atmosphere. The organic EL light source includes a luminescent layer composed of an organic luminescent element, a transparent electrode and a counter electrode, and a translucent material substrate. The translucent material substrate has a truncated quadrangular pyramidal shape having a surface in abutment with the luminescent layer as the bottom face of the shape. The bottom face is formed in the shape of a square in which the length of one side is “b”, and the top face opposite the bottom face is formed in the shape of a square in which the length of one side with respect to the same extending direction as that of the “b”-length side is “a”. In addition, the shape of the translucent material substrate has thickness “c”.

Abstract: In a ceiling fan having a blade surface light, an annular blade surface light including a plurality of LEDs that are light emitters that are continuously placed is secured on a circumference that connects sides near tips of a plurality of rotary blades of the ceiling fan, and the light emitters are lit by a lighting controller only when they are in a predetermined range on a rotation reference circumference. LED devices housing the LEDs that are the light emitters and that are provided with cooling fins are housed in an annular LED case, and the LED case is secured to the rotary blades. Thus, the LEDs radiate heat from the cooling fins provided in the LED devices by rotation of the rotary blades, and they are intermittently lit and extinguished to prevent a temperature increase. The LEDs only in the predetermined range are lit, thereby preventing any uncomfortable feeling when LEDs are caused to flash.

Abstract: A light emitting device includes a light emitting element (LEE) on a mounting board, a metal reflector surrounding the side surfaces of the LEE on the mounting board, a conductor electrically connecting the LEE with the mounting board, and a sealing resin fitted within the reflector to cover and seal the LEE and the conductor. The mounting board includes a metal baseboard, and an insulating board laminated on the base board with a window hole larger than the outer periphery of the LEE. A mount for the LEE is on the base board within the window hole with a clearance defined from window hole side surfaces. The conductor straddles the clearance, and electrically connects the wiring pattern on the insulating board with the LEE and mount. Part of the clearance associated with the area that projects from the conductor to the mounting board is narrower than the remainder.

Abstract: In an illuminating device that includes a cold cathode fluorescent lamp, and a device main body on which the cold cathode fluorescent lamp is disposed, cable connectors to which a power supply cable for supplying an electric power to the illuminating device is connected are provided on a first side surface of the device main body and a second side surface that is opposite to the first side surface.

Abstract: A fluorescent substance capable of remarkably increasing the luminous intensity of a I-III-VI2 chalcopyrite type compound having a large band gap among chalcopyrite type compounds with manganese as luminescence centers, and being favorably used for a lighting device using a light emitting diode, a light emitting element of a display device or the like, a light emitting device such as fluorescent lamps such as a cold cathode fluorescent lamp and a hot cathode fluorescent lamp, as a fluorescent substance generating fluorescence by ultraviolet excitation, is provided. The fluorescent substance is expressed by composition formula (1) Cu(Al1-xGax)(S1-ySey)2:Mn,Si??(1) (wherein x represents a number satisfying 0?x?0.4, and y represents a number satisfying 0?y?0.4), including manganese as a luminescence center atom.

Abstract: An illuminating device according to the present invention includes light guide plate 1, cold cathode fluorescent lamp 2 disposed to face a rear surface of light guide plate 1, and prism 3 that allows light emitted from cold cathode fluorescent lamp 2 to be incident on light guide plate 1, and prism 3 is disposed in a region inward from an edge of light guide plate 1.