Abstract:
PROBLEM TO BE SOLVED: To provide a printed wiring board having a structure capable of reducing the spacing between the pads for surface mounting and wherein an FPC can be mounted simultaneously with an electronic component by a reflow method even when the FPC is mounted, and to provide a method of manufacturing the same. SOLUTION: A solder resist 3 is formed on the surface so that the pads 2 are exposed, a solder resist 4 is formed between adjacent counterpart pads, and solder paste having a height not lower than that nearly same as the solder resist 4 is arranged by printing on the pad 2 spaced from the other pads 2 by the solder resist 3 and the solder resist 4. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a printed wiring board wherein the positioning of a PCB and a FPC can be carried out easily at solder jointing, and to provide a solder connecting structure and a method between the structure and a flexible printed board. SOLUTION: This printed wiring board 1 comprises a plurality of pads 2 for mounting on a flexible printed board. A solder resist 3 is formed on the surface of the printed wiring board 1 so that the pads 2 are exposed, and a convex portion is formed of an insulating printed layer 4 around each pad 2. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a radio base station apparatus small in the circuit scale of a searcher and short in the period of time required for path searching. SOLUTION: The radio base station equipment is provided with a transmitter-receiver 2 performing radio communication with a mobile terminal and a radio base station 1 connected with the transmitter-receiver 2 through an optical channel including an optical fiber 3, and the radio base station 1 is provided with a delay measuring part 5 for measuring a delay amount generated in the optical channel of information signals sent out from the mobile terminal. The delay measuring part 5 sends out a flag signal at a prescribed timing, measures the time until the sent-out flag signal is looped back in the transmitter-receiver 2 and returned, and calculates the delay amount from the measured time. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide an optical module which couples an optical element to an optical waveguide with high efficiency, by improving the accuracy of the interval between an end face of an optical coupling element and a coupling end face of the optical waveguide, and to provide a manufacturing method therefor. SOLUTION: The optical module comprises the optical waveguide 5, consisting of an optical waveguide forming layer including a lower cladding layer 2, a core layer 3, and an upper cladding layer 4: and an optical element mounting part, formed by a part of the optical waveguide forming layer, and optically couples the end face of the exposed optical waveguide 5 to the optical element 8 mounted on the optical element-mounting part. The end face of the optical waveguide 5 is provided with at least one projection part 18 for abutting, formed with a height that is not smaller than the upper cladding layer 4 at a position off the optical waveguide 5, and the optical element 8 is displaced in the direction of the optical axis by a predetermined distance, from a state in which the projection part 18 for abutting is made in contact with the end face of the optical element 8 on the optical waveguide 5 side, and then the optical element 8 is fixed to the optical element-mounting part. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a unit heat dissipation structure allowing independent unit replacement by achieving efficient heat dissipation in a unit with a heat generating component in a case. SOLUTION: A unit 1 with a heat generating component 2 is mounted in a cage 4 within a case. The unit 1 has a heat transmission plate 3 to convey heat generated in the heat generating component 2 to the ceiling of the case. The heat transmission plate 3 is configured in such a way that the heat transmission plate 3 is either brough into contact with the heat generating component 2 or incorporated. In addition, the bottom of the cage 4 is provided with a slide-up assembly composed of a base plate 6, a slide rail 5 and a guide pin 9. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a power supply circuit restraining a gain increase, preventing a phase margin decrease, and obtaining high-speed response characteristics even when a gap between input and output voltages of a voltage converting circuit is large. SOLUTION: Low pass filters (20, 21) are provided to a feedback control system which amplifies a gap between a reference voltage signal of a reference voltage source (12) and the output voltage of the voltage conversion circuit (11) with a gap amplifier (19), and a cutoff frequency is changed according to the reference voltage signal of the reference voltage source (12) and the output voltage of the voltage conversion circuit (11). When a gap between the input voltage and output voltage of the voltage conversion circuit (11) is large, the gain of the feedback control system is decreased, thus obtaining a stable output voltage even under various types of variation or in transition states. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a waterproof and dustproof pointing device capable of generating a travel control command of a control target in an arbitrary direction of a display screen in simple structure where with no projections from the surface of a casing or the number of projections is minimized, if any. SOLUTION: An input unit comprises: the casing having a frame section 10 on a front face; a rubber sheet 3 formed by an elastic and flexible material and is arranged nearly in parallel with an XY plane while a nearly peripheral section is adhered to the inside of the front face of the casing; a center key 1 adhered to a surface opposing to the casing of the rubber sheet 3, positioned nearly at the center of the frame section 10, and travelable in an arbitrary direction in the XY plane; and a Hall element 7 detecting the amount of travel and direction within the XY plane of the center key 1, when the XY plane is defined to be nearly in parallel with the front face of the casing. A resin sheet 6 covering the contact surface to a pressing element 4 in a metal dome 5 is arranged on a substrate 8 where the metal dome 5 for detecting the pressing of the center key 1 is installed. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an input device of a simple structure and a mobile terminal in which a pointing device with a waterproof property and a dustproof property capable of generating the movement control instruction of a control object in the optional direction of a display screen has no or infinitely small part projected from a case body surface. SOLUTION: The input device is provided near the opening of a case body with the opening in defining a plane almost parallel to a case body front surface as an XY plane indicated by an XY rectangular coordinate system. Then, the input device comprises: the case body having an almost circular frame 10 of a prescribed diameter on a front surface; a rubber sheet 3 formed of an elastic and flexible material arranged so as to face the inner side of the case body almost parallelly to the XY plane, and tightly adhered to the inner side of the case body front surface; an almost columnar center key 1 adhered to a surface facing the case body of the rubber sheet 3 positioned at almost the center of the frame 10, and movable in the optional direction within the XY plane; a Hall element 7 for detecting the moving direction and a moving amount within the XY plane of the center key 1; and a means for generating a first control signal corresponding to the moving direction and the moving amount of the center key 1 detected by the Hall element 7. COPYRIGHT: (C)2004,JPO