摘要:
The present invention provides a planer acoustic transducer including a vibrating diaphragm including a spiral voice coil provided on both surfaces or on one surface of an insulating base film; and a permanent magnet corresponding to the voice coil, wherein, in the vibrating diaphragm, the spiral voice coil is formed by applying a wire conductor, in a coil pattern, onto a sheet-like substrate having an adhesive layer on at least one surface thereof. Alternatively, at least a portion of the vibrating diaphragm, which portion corresponds to the loop of a first or second vibration mode, is reinforced with a rigidity-imparting member; the substrate of the vibrating diaphragm is formed of a resin foam; or the voice coil is formed three-dimensionally.
摘要:
This invention provides a planar acoustic converting apparatus including a support having a flat plate portion, a diaphragm which has an insulating base film having a liquid crystalline polymer film and being opposed to the flat plate portion of the support and at least one spiral coil provided on one major surface or both major surfaces of the insulating base film, at least one permanent magnet supported by the support and opposing a magnetic pole to the diaphragm, and a holding portion provided to the support and holding the diaphragm such that the diaphragm can vibrate and is positioned apart from the at least one permanent magnet.
摘要:
The present invention provides a planer acoustic transducer including a vibrating diaphragm including a spiral voice coil provided on both surfaces or on one surface of an insulating base film; and a permanent magnet corresponding to the voice coil, wherein, in the vibrating diaphragm, the spiral voice coil is formed by applying a wire conductor, in a coil pattern, onto a sheet-like substrate having an adhesive layer on at least one surface thereof. Alternatively, at least a portion of the vibrating diaphragm, which portion corresponds to the loop of a first or second vibration mode, is reinforced with a rigidity-imparting member; the substrate of the vibrating diaphragm is formed of a resin foam; or the voice coil is formed three-dimensionally.
摘要:
A multilayer circuit board formed by integrally laminating a plurality of printed wiring boards in a multilayer structure so as to provide air gaps therebetween. An insulating layer is formed on each of both surfaces of a metal core substrate having through-hole forming apertures and a printed wiring layer is formed on the each insulating layer. Metal projections integrally formed on the metal core substrate serve as bonding electrodes between the adjacent wiring boards in the multilayer structure. The width of the air gap provided between the adjacent wiring boards is determined by the height of the metal projections.
摘要:
Provided is a broadcast control apparatus that realizes broadcasting to a predetermined distribution area, as in an existing public mobile communication network in a communication system using a femto cell base station. The broadcast control apparatus includes a database, in which location information of the femto cell base station existing in a predetermined distribution area section is associated with the distribution area section. The broadcast control apparatus also includes update means for updating the association in the database based on the location information of the femto cell base station received by reception means.
摘要:
An apparatus concealing member in which a film-type information input device (4) is placed under a film-type transparent base member (3), a functional liquid crystal film (5) is placed under the information input device (4) at a position where the functional liquid crystal film (5) covers a portion to be concealed (1b) of an apparatus and can be electrically changed over between being transparent and being non-transparent, and a non-metal and film-type glossy layer (6) is placed under the functional liquid crystal film and exhibits transparency and a gloss due to reflection.
摘要:
A housing case (1) for a small electric device and communication device includes a flat plate (2) having a dimension substantially the same as that of the front portion of the housing case and comprising at least a glass plate, and a resin frame (3) integrated with the flat plate (2) to support the backside periphery of the flat plate (2).
摘要:
A two-color molding equipment for shaping a two-color molded product by placing a film in primary mold tool configured by a fixed mold and a movable mold, injecting a resin into a first cavity formed by closing the molds to shape a primary molded piece, shifting the primary molded piece provided with the film to secondary mold tool configured by the fixed mold and the movable mold, and injecting a resin into a second cavity formed by closing the molds to shape a secondary molded piece, the two-color molded product composed of an integrated combination of the primary molded piece, the secondary molded piece, and the film interposed therebetween, wherein the first cavity is configured to shape the primary molded piece to be smaller than the film so that a part of the film protrudes from the primary molded piece, and a wall surface located at the protruding portion of the film to constitute the first cavity is provided with a convex portion that restricts mold shrinkage of the film protruding portion in the primary molded piece.
摘要:
A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power. In the zoom lens, an interval between the first and second lens units becomes smaller at a telephoto end than at a wide-angle end during zooming. The first lens unit includes, in order from the object side to the image side, a first lens having a negative refractive power, a second lens having a negative refractive power, which is made of a plastic and has an aspheric lens surface, and a third lens unit having a positive refractive power. In the zoom lens, a refractive index and an Abbe number of the plastic (Nd, νd), a focal length of the second lens (fn), and a focal length of the first lens unit (f1) are appropriately set.
摘要:
A display device for displaying information is provided with an optical system for guiding the light of the display device to the eye, the optical system having, in the order in the proceeding direction of the light, an entrance face for receiving the light, a curved face for totally reflecting the light and a reflecting face concave to the eye side and adapted to reflect the light toward the eye. The reflected light is transmitted by the curved face and reaches the eye. Thus there is obtained a compact display device with satisfactorily suppressed aberrations.