Abstract: A liquid crystal display device capable of improving display quality by enabling proper execution of receipt and acceptance of image signals through compensation for variation in duty ratios of clock signals as input to liquid crystal driver circuitry, is provided.

Abstract: A net detecting unit detects a set of component terminal interconnection information showing a critical net from a component terminal interconnection information list. A conductor detecting unit detects a conductor corresponding to the critical net. A component detecting unit detects two components from the set of component terminal interconnection information. A terminal detecting unit detects a power and/or ground terminal of each of the detected components. A power/ground layer detecting unit detects at least one layer, among power and ground layers, to which the detected power and/or ground terminals are connected. A layer detecting unit specifies a layer, among the detected layers, that is nearest to a signal layer on which the conductor is placed. A prohibition area generating unit generates a via prohibition area on the specified layer. As a result, vias are placed on the specified layer, avoiding the via prohibition area.

Abstract: An electronic unit device includes a connector and a casing. The connector is connectable to a to-be-connected device. The casing includes a cover panel which can be opened and closed. The cover panel comprises a panel body and a partial panel. The panel body has a cut section. The partial panel is attachable and detachable to and from the cut section, and covers at least the surface of the connector, when the partial panel is attached into the cut section. The panel body includes a falling-prevention section, for preventing the installed partial panel from falling from the cut section, and a guide section for guiding the partial panel. The partial panel includes at least one engagement section to be engaged with the falling prevention section. The partial panel includes a section, to be in contact with the panel body, which is formed in such a shape as to be fit into the guide section.

Abstract: A bidirectional transmission circuit for inputting/outputting a signal from/onto a bidirectional transmission line includes: a transceiver for transmitting/receiving a signal; a first element having an impedance; a second element being a short line; and a switching unit for coupling the transceiver to the bidirectional transmission line via the first element when the transceiver transmits a signal, and coupling the transceiver to the bidirectional transmission line via the second element when the transceiver receives a signal.

Abstract: A design aiding apparatus and a method, and a storage medium storing a design aiding program enable the efficient layout design of components in a multilayer wiring board formed by laminating a plurality of wiring layers. The design aiding apparatus includes (a) a first acquiring unit for acquiring information showing a first location in a lamination direction of the wiring layers, (b) a second acquiring unit for acquiring information showing a second location on a two-dimensional plane that is orthogonal to the lamination direction, and (c) a placement unit for generating information showing a space to be occupied when the component is placed in such a manner that a placement reference point of the component coincides with the second location that is on the two-dimensional plane including the first location. According to the above construction, the present invention is capable of aiding layout design of components in the wiring board.

Abstract: A method of evaluating noise immunity of a semiconductor device is provided. An actual circuit including the semiconductor device is represented by an equivalent circuit which has a target equivalent circuit, a noise source equivalent circuit, and an external equivalent circuit connected in parallel. The target equivalent circuit represents the semiconductor device. The noise source equivalent circuit represents a noise source outside the semiconductor device, and supplies noise to the target equivalent circuit. The external equivalent circuit represents a circuit outside the semiconductor device. The noise immunity is evaluated based on a voltage or current which arises in the target equivalent circuit by the noise. In this way, the immunity of the semiconductor device against extraneous noise can be evaluated in consideration of the effects of the circuitry outside the semiconductor device.

Abstract: A device unit housing apparatus provided with a simple structure to easily engage and disengage a device unit such as a magnetic disk drive unit with or from an apparatus main body. The device unit housing apparatus includes an apparatus main body provided with an engaging through-hole formed therein for accommodating a device unit or an engaged subject, and a unit engaging mechanism provided on the device unit. The unit engaging mechanism includes a unit engaging body movable and engageable with the engaging through-hole, and an elastic member which can always press the unit engaging body against the engaging through-hole.

Abstract: An LCD fastening method and equipment for using common portions necessary for fastening a color LCD display, that is, common portions suitable for various kinds of color LCD display are disclosed, thereby omitting the process of attaching the LCD by using screws inserted from the outside of an external frame and improving the appearance. The method comprises the steps of attaching brackets to a color LCD using first fastening screws inserted through holes provided in the brackets; attaching the brackets to an LCD base by inserting second fastening screws through holes provided in the brackets into bosses provided in the LCD base; and attaching an LCD cover to the LCD base by engaging a predetermined number of latches provided in the LCD cover with corresponding first ribs provided in the LCD base.

Abstract: An authentication communication system includes an storage medium having an area for storing digital information and an access device for reading/writing digital information from/into the area. The access device authenticates whether the storage medium is authorized according to a challenge-response authentication protocol in which scrambled access information generated by scrambling the access information which shows the area is used. The storage medium authenticates whether the access device is authorized. When the access device and the storage medium have authenticated each other as authorized devices, the access device reads/writes digital information from/into the area in the storage medium according to the access information separated from the scrambled access information by the access device.

Abstract: A signal line, being in a six-layer board and connecting terminal 102 of component 101 with terminal 115 of component 114, requires tamper-resistance. The signal line is composed of foil 103 on an outside layer, a via 104, foil 111 on the third layer, via 105, foil 112 on the fourth layer, via 106, and foil 113 on the sixth layer. Portions of the signal line that exist on outside layers are all hidden under circuit components. Foil 103 and an end of via 104 are placed under component 101 on first layer 116, an end of via 105 is placed under component 107 on layer 116, an end of via 106 is placed under component 108 on layer 116, the other end of via 104 is placed under component 109 on sixth layer 121, the other end of via 105 is placed under component 110 on layer 121, and foil 113 and the other end of via 106 are placed under component 114 on layer 121.

Abstract: A tape loading apparatus comprises a base, a roller post about which a tape is wrapped for tape loading, and a carrying member for carrying the roller post. The roller post includes a rotation shaft and a roller rotating about the rotation shaft, and a shaft engagement member is provided on the base for holding the roller post at a predetermined position, the shaft engagement member directly contacting and pressing one or both ends of the rotation shaft.

Abstract: A tape loading device for loading a tape from a first state, in which the tape is mounted on a chassis, to a second state, in which a tape running path is formed as a result of a tape guide post pulling out and winding the tape at a prescribed position is provided. The tape loading device includes a transportation member having the tape guide post thereon; a forward wall integrated with the transportation member and disposed rearward to the tape guide post and inclined so that normal thereto is directed forward and obliquely upward; and a pressure-contact member, which is in pressure-contact with the forward wall in the second state, for urging the transportation member forward and obliquely upward.

Abstract: A magnetic recording and reproduction apparatus includes a tape guide element guiding member for guiding a tape guide element; a bendable chain-like driving member having a first end and a second end, the chain-like driving member being connected to the tape guide element guiding member at the first end, and the second and of the chain-like driving member being pulled or pushed so as to produce a reciprocating movement of the tape guide element guiding member; and a chain guiding member for guiding the chain-like driving member. The chain-like driving member includes a plurality of flexures for facilitating a bending movement of the chain-like driving member. The chain-like driving member causes a reciprocating movement of the tape guide element while being bent during a loading operation and an unloading operation.

Abstract: The present invention provides a dental-mixture pouring device for pouring a mixture into a target site while minimizing catching of bubbles in the mixture, wherein vibration generated by a vibration generating mechanism 11 is transmitted by vibration transmitting means 17 including a storage section 30 for a mixture 23, and wherein a flexible tip 85 is provided at a terminal portion of the vibration transmitting means 17 for supplying a target site with the mixture 23 flowing out from an orifice 31, 32, 33 of the storage section 30.

Abstract: A liquid crystal display device capable of improving display quality by enabling proper execution of receipt and acceptance of image signals through compensation for variation in duty ratios of clock signals as input to liquid crystal driver circuitry, is provided.

Abstract: A design aiding apparatus and a method, and a storage medium storing a design aiding program enable the efficient layout design of components in a multilayer wiring board formed by laminating a plurality of wiring layers. The design aiding apparatus includes (a) a first acquiring unit for acquiring information showing a first location in a lamination direction of the wiring layers, (b) a second acquiring unit for acquiring information showing a second location on a two-dimensional plane that is orthogonal to the lamination direction, and (c) a placement unit for generating information showing a space to be occupied when the component is placed in such a manner that a placement reference point of the component coincides with the second location that is on the two-dimensional plane including the first location. According to the above construction, the present invention is capable of aiding layout design of components in the wiring board.

Abstract: A device unit housing apparatus provided with a simple structure to easily engage and disengage a device unit such as a magnetic disk drive unit with or from an apparatus main body. The device unit housing apparatus includes an apparatus main body provided with an engaging through-hole formed therein for accommodating a device unit or an engaged subject, and a unit engaging mechanism provided on the device unit. The unit engaging mechanism includes a unit engaging body movable and engageable with the engaging through-hole, and an elastic member which can always press the unit engaging body against the engaging through-hole.

Abstract: A decryption device includes: an internal-key storage section for storing an internal-key; a content-key storage section for storing a content-key; a determination section for determining whether or not a value of the content-key storage section in its initial state and a current value of the content-key storage section are different; and an operation section, the operation section including a first decrypting section which, when an encrypted content-key is input to the operation section, decrypts the encrypted content-key using the internal-key so as to obtain a content-key and stores the content-key in the content-key storage section, and a second decrypting section which, when an encrypted content is input to the operation section and the determination section determines that the value of the content-key storage section in its initial state and the current value of the content-key storage section are different, decrypts the encrypted content using the current value of the content-key storage section as a c

Abstract: An electronic unit device includes a connector and a casing. The connector is connectable to a to-be-connected device. The casing includes a cover panel which can be opened and closed. The cover panel comprises a panel body and a partial panel. The panel body has a cut section. The partial panel is attachable and detachable to and from the cut section, and covers at least the surface of the connector, when the partial panel is attached into the cut section. The panel body includes a falling-prevention section, for preventing the installed partial panel from falling from the cut section, and a guide section for guiding the partial panel. The partial panel includes at least one engagement section to be engaged with the falling prevention section. The partial panel includes a section, to be in contact with the panel body, which is formed in such a shape as to be fit into the guide section.

Abstract: The magnetic recording/reproduction apparatus of the present invention records/reproduces information on/from a magnetic tape by drawing out the magnetic tape from a tape cassette and allowing the magnetic tape to pass around a rotary head cylinder, having a rotary head, for a predetermined arc. The tape cassette is drawn by moving tape guide members located at an opening of the tape cassette. The recording/reproduction apparatus includes: a first chassis on which the tape cassette is placed; and a second chassis having thereon the rotary head cylinder. The magnetic recording/reproduction apparatus includes: a first state in which the tape cassette is placed on the first chassis by a user; and a second state in which a tape running path enabling recording/reproduction of the magnetic tape is established.