Abstract: A heat sink that radiates n exoergic circuit elements mounted on a circuit board includes a housing that has a heat-receiving surface that receives heat from the n exoergic circuit elements, and n+2 fixture parts to each of which a fixture member is attachable, each fixture member compressively fixing the housing onto the circuit board, wherein n is equal to or greater than 2, the heat sink is used to commonly radiate the n exoergic circuit elements, and a line that connects two fixture members to each other among n+2 fixture members passes between two centers of gravity of two adjacent exoergic circuit elements.

Abstract: A display unit has a display module and a housing case holding the display module. The housing case has a first member made of an electrically conductive material and a second member. The second member has an inner edge portion superposed with an outer edge portion of the first member and is made of an electrically nonconductive material. The second member is positioned outside the first member and is fixed to the first member. The first member has a step in its outer edge portion. The step extends over a whole area superposed with the second member. The step has an inner wall protruding and end outer wall dented as compared with a middle portion inside the outer edge portion of the first member. The second member has an inner edge portion arranged in a recess of the outer wall of the step.

Abstract: An electronic apparatus includes a first housing; a second housing; and a coupling unit that openably/closably and rotatably couples the second housing with the first housing. The coupling unit is a biaxial coupling unit having: a rotation axis that vertically extends when the first housing is placed on a horizontal table, and is rotatably coupled to the first housing; and an opening/closing axis that is fixed to the rotation axis, horizontally extends, openably/closably supports the second housing with respect to the first housing, and rotates as the rotation axis rotates. The coupling unit includes a stopper to rotate the rotation axis-only when the second housing is opened with respect to the first housing within a range of rotation-allowing opening angle that allows for rotation.

Abstract: A display device is provided with a display module that has a display panel, which has a display screen where information is displayed, and an elastic member that is attached to both edges of the display panel. The display device is further provided with a housing case that has holding protrusions, which stand apart from one another at positions spreading beyond the outline of the display module and matching the outline of the display module, and come into contact with the elastic member to hold the display module between one another.

Abstract: An electoronic apparatus includes a first housing; a second housing that has a periphery having a first edge, and a second edge intersecting the first edge; and a coupling unit that has a first rotation axis in a direction intersecting with the surface of the first housing, and couples the first housing and the first edge of the second housing so that the second housing is rotatable about the first rotation axis with respect to the first housing. The electoronic apparatus further incldues; a fingerprint reading sensor provided on the first edge of the second housing; and an antenna that is incorporated into the second edge of the second housing.

Abstract: A multi-bit D/A converter circuit that prevents a bit inversion and requires a reduced layout area is offered. A first switching circuit is provided in order to select a pair of analog voltages generated across one of resistors in a first resistor string. The selected pair of analog voltages is provided as reference voltages to a second resistor string. A second switching circuit is provided in order to select a pair of analog voltages generated across one of the resistors in the second resistor string. The selected pair of analog voltages is provided as reference voltages to a third resistor string. A third switching circuit is provided in order to select one of analog voltages generated in the third resistor string.

Abstract: The present relates to an electronic device represented by, for example, a personal computer and aims to reinforce a connector as well as suppress the increase in the number of parts. The electronic device includes: a motherboard 29; a USB connector 23 whose one side is secured to the motherboard 29 with its mating surface 231 pointing outward; and a support member 51 for supporting a woofer 25 which is larger than the USB connector 23, and which is disposed in a position adjacent to the USB connector 23; and the support member 51 further has a reinforcement section 512 for reinforcing the USB connector by adjoining the USB connector 23.

Abstract: The present invention relates to an electronic device represented by, for example, a personal computer and aims to dispose an IC card in a suitable position. The electronic device includes: a main unit 20 in the shape of a small board equipped with a keyboard 21 disposed at a rearward position on the upper surface; a heat-producing part incorporated within the main unit 20 so as to make the amount of heat produced in the back half of the main unit 20 become larger than the amount of heat produced in the front half; and a card slot formed in the front end face of the main unit 20, into which a removable IC card can be inserted.

Abstract: The present invention relates to various types of electronic apparatus having a folding structure via hinges and aims to help further enrich and compact functions. The apparatus includes: a first enclosure having a circuit component; a hinge unit rotatably connected to the first enclosure via a hinge; and a second enclosure having a circuit component and connected to the first enclosure via the hinge unit, in which the hinge unit has a circuit component.

Abstract: A wall stands upright from the surface of the bottom plate in the vertical direction in an electronic apparatus. An opening is defined in the wall. A connector defines a cylindrical portion located in the opening to receive a plug. A rib stands upright from the surface of the bottom plate. The rib defines a lock surface and an inclined surface. The lock surface extends in the vertical direction so as to hold the connector between the wall and the lock surface itself. The inclined surface is connected to the upper end of the lock surface. When the connector is set within the enclosure, the connector is received on the inclined surface. The connector slides on the inclined surface. The cylindrical portion enters the opening. When the connector drops off the inclined surface, the connector is fitted between the lock surface and the wall.

Abstract: A method for detecting the charged state of a battery based on the measurements of open circuit voltage in which the charged state of a battery can be detected precisely regardless of the degradation state of the battery. Internal impedance of a battery is measured, voltage of the battery is measured under stable state, measurement of the battery voltage under stable state is subjected to raising correction depending on the measurement of internal impedance, and then charged state of the battery is determined based on the corrected value of battery voltage under stable state.

Abstract: A heat sink that radiates n exoergic circuit elements mounted on a circuit board includes a housing that has a heat-receiving surface that receives heat from the n exoergic circuit elements, and n+2 fixture parts to each of which a fixture member is attachable, each fixture member compressively fixing the housing onto the circuit board, wherein n is equal to or greater than 2, the heat sink is used to commonly radiate the n exoergic circuit elements, and a line that connects two fixture members to each other among n+2 fixture members passes between two centers of gravity of two adjacent exoergic circuit elements.

Abstract: The present invention relates to an electronic apparatus having: a base section to be placed on a flat surface such as the top of a desk; a standing section standing on the base section; an open/close section rotatably supported by the standing section and openable/closable with respect to the standing section; and an electronic circuit incorporated therein. The present invention aims to achieve appropriate distribution of weight. The base section has a battery-pack storing section that stores a battery pack for supplying power to the electronic circuit of the electronic apparatus.

Abstract: A cover is coupled to a base with the inner surface of the cover opposed to the inner surface of the base. In this case, a rib standing from the inner surface of the cover is guided along the contour of a printed wiring board fixed to the inner surface of the base. The method allows the printed wiring board on the base to guide the movement of the rib of the cover. The printed wiring board is utilized to align the cover with the base with a higher accuracy. The cover is thus reliably prevented from colliding against an electronic component mounted on the printed wiring board. This results in a reliable avoidance of damage to the electronic component.

Abstract: A fan has a casing defining a protuberance swelling from a flat surface in an electronic apparatus. A printed wiring board defines a recess. The recess is allowed to receive the protuberance of the casing. The printed wiring board receives the flat surface of the casing at a position adjacent to the protuberance. This results in a reduction in the height of the casing from the upper surface of the printed wiring board as compared with the case where the protuberance is received on the upper surface of the printed wiring board. The thickness of the electronic component can be reduced. The recess is formed along the contour of the printed wiring board. The recess can be formed in a facilitated manner as compared with the case where a bore is formed in the printed wiring board.

Abstract: A wall stands upright from the surface of the bottom plate in the vertical direction in an electronic apparatus. An opening is defined in the wall. A connector defines a cylindrical portion located in the opening to receive a plug. A rib stands upright from the surface of the bottom plate. The rib defines a lock surface and an inclined surface. The lock surface extends in the vertical direction so as to hold the connector between the wall and the lock surface itself. The inclined surface is connected to the upper end of the lock surface. When the connector is set within the enclosure, the connector is received on the inclined surface. The connector slides on the inclined surface. The cylindrical portion enters the opening. When the connector drops of f the inclined surface, the connector is fitted between the lock surface and the wall.

Abstract: A switch element is enclosed in the enclosure. The switch element includes a movable piece designed to move along a straight line between a switch-on position and a switch-off position. An operating piece is located along the outer surface of the enclosure. A connecting piece is located along the inner surface of the enclosure. The connecting piece is connected to the movable piece of the switch element. A sliding piece extends around the edge of the enclosure to connect one end of the operating piece to one end of the connecting piece. The sliding piece is designed to slide on the edge of the enclosure. The movable piece of the switch element moves between the switch-on position and the switch-off position in response to the movement of the operating piece.

Abstract: A power supply apparatus includes a diode that is disposed in the path of a main current that is a subject of power control. The diode includes a substrate; a gallium-nitride buffer layer formed on the substrate; a gallium-nitride layer formed on the gallium-nitride buffer layer; and an n-type aluminum-gallium-nitride layer formed on the gallium-nitride layer.

Abstract: A fuel cell comprised of a proton conductive electrolyte film sandwiched between a pair of catalyst layers, wherein the catalyst layer of at least the cathode is comprised of a mixture including a catalyst ingredient, an electrolytic material, and a carbon material, the carbon material is comprised of a catalyst-carrying carbon material carrying the catalyst ingredient and a gas-diffusing carbon material not carrying the catalyst ingredient, and the catalyst-carrying carbon material has an amount of adsorption of water vapor at 25° C. and a relative humidity of 90% of 50 ml/g or more.

Abstract: A display device comprising: a housing; a plate-shaped display unit having respective side walls; and a fixing means for fixing the display unit to the housing; the fixing means including a Z-direction holding means for holding the display unit in the thickness direction and also including an X-direction holding means and a Y-direction holding means for holding the display unit in the X-direction and the Y-direction perpendicular to the X-direction; at least one of the X-direction holding means and the Y-direction holding means being composed of wall sections, which are opposed to each other, of the housing adjacent to respective side walls of the display unit; a protruding section being formed which protrudes from the side wall of the display unit to the wall section; the wall section having a cutout engaging with the protruding section at a position of the wall section corresponding to the protruding section; and the other of the X-direction holding means and the Y-direction holding means being composed by