Abstract: There is a manufacturing error even if an RGB coupler is appropriately designed, and thus a problem that it is difficult to achieve the function as designed with good yield arises. To solve this problem, an optical circuit with a first waveguide in which light in a zero-th order mode is guided and a second waveguide having a larger width than the first waveguide, in which light in a primary mode is guided in which the first and second waveguides at least include a first curved portion in a curve shape curved toward the first waveguide while maintaining a combination of waveguide widths satisfying mode conversion conditions is provided.

Abstract: A touch-panel display device in which a plurality of operation items are displayed in arrangement includes a tilt detector detecting an inclination of a portable equipment, and controls a display ratio of the plurality of operation items according to the direction of an inclination detected by the tilt detector and displays an operation item in large scale.

Abstract: A cathode material for a secondary battery containing a cathode active material represented by the general formula LinFePO4 (wherein n represents a number from 0 to 1) as a primary component and molybdenum (Mo), wherein the cathode active material LinFePO4 is composited with the Mo. In a preferred embodiment, the cathode material has conductive carbon deposited on the surface thereof.

Abstract: A positive electrode material is disclosed which contains an iron lithium phosphate as a positive electrode active material and has a large charge/discharge capacity, high-rate adaptability, and good charge/discharge cycle characteristics at the same time. Also disclosed are a simple method for producing such a positive electrode material and a high-performance secondary battery employing such a positive electrode material. Specifically, disclosed is a positive electrode material for secondary battery characterized by mainly containing a positive electrode active material represented by the general formula: LinFePO4 (wherein n is a number of 0-1) and further containing at least one different metal element selected from the group consisting of vanadium (V), chromium (Cr), copper (Cu), zinc (Zn), indium (In) and tin (Sn). This positive electrode material can be produced using a halide of such a metal element as the raw material.

Abstract: A touch-panel display device in which a plurality of operation items are displayed in arrangement includes a tilt detector detecting an inclination of a portable equipment, and controls a display ratio of the plurality of operation items according to the direction of an inclination detected by the tilt detector and displays an operation item in large scale.

Abstract: A method for producing a cathode material for a secondary battery, characterized in that it comprises admixing a compound liberating a phosphate ion in a solution (phosphoric acid H3PO4, phosphorus pentoxide PO5, ammonium dihydrogenphosphate NH4H2PO4 and the like), water and metallic iron, adding lithium carbonate, lithium hydroxide or a hydrate thereof to the resultant mixture, and firing the resultant reaction product, to thereby synthesize LiFePO4.

Abstract: A cathode material for a secondary battery containing a cathode active material represented by the general formula LinFePO4 (wherein n represents a number from 0 to 1) as a primary component and molybdenum (Mo), wherein the cathode active material LinFePO4 is composited with the Mo. In a preferred embodiment, the cathode material has conductive carbon deposited on the surface thereof.

Abstract: A positive electrode material is disclosed which contains an iron lithium phosphate as a positive electrode active material and has a large charge/discharge capacity, high-rate adaptability, and good charge/discharge cycle characteristics at the same time. Also disclosed are a simple method for producing such a positive electrode material and a high-performance secondary battery employing such a positive electrode material. Specifically, disclosed is a positive electrode material for secondary battery characterized by mainly containing a positive electrode active material represented by the general formula: LinFePO4 (wherein n is a number of 0-1) and further containing at least one different metal element selected from the group consisting of vanadium (V), chromium (Cr), copper (Cu), zinc (Zn), indium (In) and tin (Sn). This positive electrode material can be produced using a halide of such a metal element as the raw material.

Abstract: A method for producing a cathode material for a secondary battery, characterized in that it comprises admixing a compound liberating a phosphate ion in a solution (phosphoric acid H3PO4, phosphorus pentoxide PO5, ammonium dihydrogenphosphate NH4H2PO4 and the like), water and metallic iron, adding lithium carbonate, lithium hydroxide or a hydrate thereof to the resultant mixture, and firing the resultant reaction product , to thereby synthesize LiFePO4.

Abstract: A water-repellent film is applied on to the surface of a welding member such as of a welding backing member disposed backside a joint defined between two mating welding bevels, a welding bevel of a base member to be welded, and a coated welding rod formed by coating a metallic core wire with a flux. The water-repellent film is formed of a hydrophobic material having a contact angle of 90.degree. or above and providing minute concavities and convexities. In a highly humid environment, during rainfall or in water, welding can be effected without weld defects such as blow holes, cracks and the like.

Abstract: A surge absorbing device of composite construction comprising a high resistance element of metal oxide and a pair of electrodes connected to the high resistance element with a discharging gap formed between the electrodes. At a normal state, a fine current flows through the high resistance element, but when a surge voltage is transiently applied across the high resistance element, a triggering discharge is produced across the electrodes by a voltage drop of the product of the resistance value of the high resistance element and the value of surge current whereby it is immediately transferred to a main discharge of large current to absorb the surge current at a high velocity. A heat-proof and reduction-proof protective film is formed on the surface of the high resistance element to stabilize the characteristic of surge absorption.