Abstract: After a workpiece introduced into a welding station by a feed mechanism is positioned and fixed in the welding station, the workpiece is welded by laser beams guided by scan heads. Each laser beam is applied from one of the scan heads to a location on the workpiece through a beam path switching mirror of a beam path switcher to weld the location on the workpiece. Thereafter, the beam path switching mirror is retracted to guide the laser beam from another one of the scan heads to another location on the workpiece to weld the other location on the workpiece.

Abstract: In an organic electroluminescent device according to the present invention, at least a luminescent layer using an organic material is provided between a hole injection electrode and an electron injection electrode, and a luminescent material composed of a condensed polycyclic aromatic compound having condensed rings each having a benzene ring as a basic unit the number of which is in the range of 2 to 10, along with an organic material having hole transporting characteristics, is contained as the organic material in the luminescent layer.

Abstract: In an organic electroluminescent device according to the present invention, at least a carrier transporting layer and a luminescent layer which use an organic material are provided between a hole injection electrode and an electron injection electrode, and at least one of a compound having a pyrimidine ring as its center skeleton and a compound having a triazine ring as its center skeleton is used for a hole transporting material in a hole transporting layer in the carrier transporting layer and the organic material in the luminescent layer.

Abstract: In an organic electroluminescent device according to the present invention, at least a carrier transporting layer and a luminescent layer which use an organic material are provided between a hole injection electrode and an electron injection electrode, wherein a luminescent portion having a luminescent peak wavelength different from a luminescent peak wavelength in the luminescent layer is partially provided in such a manner that it is laminated on the luminescent layer, or at least a hole transporting layer having luminous characteristics and an electron transporting layer having luminous characteristics which respectively contain organic materials emitting fluorescence in different colors in a visible region are provided between the hole injection electrode and the electron injection electrode, wherein a hole transporting portion having non-luminous characteristics is partially provided between the hole transporting layer having luminous characteristics and the electron transporting layer having luminous ch

Abstract: Organic electroluminescent elements capable of operating at a low driving voltage, leading to saving of electric power and operating cost for a driving circuit. In an organic electroluminescent element in which a hole transport layer and a luminous layer are formed between a hole injecting electrode layer and an electron injecting electrode layer which are oppositely arranged in a pair and in which the hole transport layer is overlaid on the hole injecting electrode layer, the hole transport layer is doped with a hole injection material at least at a region near the interface between the hole transport layer and a hole injecting electrode. The hole injection material has an ionization potential which is lower than that of the material of the hole transport layer and higher than that of the material of the hole injecting electrode layer.

Abstract: An organic EL element that exhibits excellent durability by reducing the amount of accumulated carriers and curbing degradation by heat generated while the organic EL element is driven.

Abstract: The present invention provides an organic EL element improved in durability. The organic EL element comprises a hole-injecting electrode and an electron-injecting electrode, and at least a film made of a luminous material therebetween, wherein the luminous material is one of a metal complex polymer, an inner complex salt having two or more ligands, and 10-hydroxybenzo [h] quinoline-metal complex.

Abstract: An electroluminescent (EL) device is disclosed which has a pair of electrodes, an organic film therebetween including at least organic emitting material, and a vacuum evaporated metal film extending from the electrodes on to the outer surface of the organic film. The metal film protects at least an area on the outer surface of the organic film against air. The area is part of the border between the exposed area of the organic film and one of the electrodes, the part of the border corresponding to the crossing region of the electrodes and its vicinity.

Abstract: An electroluminescent device having a hole injection electrode, an electron injection electrode, and at least an organic emitting layer therebetween, said organic emitting layer includes an 8-quinolinol derivative-metal complex whose ligand is selected from the group consisting of chemical formulas 102 through 106:chemical formula 102 ##STR1## chemical formula 103 ##STR2## chemical formula 104 ##STR3## chemical formula 105 ##STR4## chemical formula 106 ##STR5##

Abstract: There is disclosed an EL element having at least one layer made from an organic material between an electron injection electrode and a hole injection electrode. The organic material consists of an oxadiazole series compound which has a plurality of oxadiazole rings, each of the oxadiazole rings being substituted by a condensed polycyclic aromatic group.

Abstract: There is disclosed an electroluminescent (EL) element having an electron injection electrode, a hole injection electrode, and at least one layer therebetween, the layer comprising either a Rhodamine metal complex, a chromone metal complex, an azomethine metal complex, or another metal complex whose ligand is either thiobromine, flaviosin, or acriflavine.

Abstract: ISDN (Integrated Services Digital Network) terminal equipment connected to an ISDN basic rate interface and capable of enhancing efficient communication. The terminal equipment reoriginates a call as soon as an idle channel occurs. This reduces the waiting time up to call reorigination and enhances efficient communication.

Abstract: An optical wavelength converting device includes a substrate, and a waveguide layer of a nonlinear organic material formed on one major surface of the substrate and having a thickness tapered along one axis parallel to the major surface, in which a waveguide with a desired thickness can be selected in a direction normal to the axis.

Abstract: A focus adjusting apparatus comprises a focus lens device provided in an optical system. The focus lens device comprises a transparent container of a rectangular prism form, a lens member supported in the container and formed of poly(acrylic amide) gel as a polymer gel substance having electro-reactive deformability, and a pair of transparent electrodes, the container being filled with water-aceton mixture solution. The lens member is formed by two lens materials having different proportions of acrylic acid group. A voltage is applied to the transparent electrodes under control of an automatic focusing circuit to cause electric field in the container, whereby the lens member is deformed in a concentric spherical form to form a lens. When the application of the voltage is stopped, the lens member returns to the initial form. A focal distance of the lens member is changed according to degrees of such deformation of the lens member.

Abstract: An ultrafine tube is produced by a method comprising the steps of applying a highly polymerized material on a substrate to form a resist layer on a surface of said substrate, applying a laser beam to the resist layer under such a condition that said resist layer is melted to form an ultrafine tube between the substrate and resist layer in the predetermined pattern.