Abstract: In a reader for an RFID tag for near-field wireless communication, an antenna selection switch includes a plurality of antennae arranged with an extent within a predetermined range for transmitting and receiving data to and from an RFID tag, and selects one antenna to be used for transmission and reception of data from among the plurality of antennae. A detection part acquires, when a carrier wave transmitted from the RFID tag is received by any of the plurality of antennae, information indicative of an antenna selected by the antenna selection switch under the control of an antenna changeover controlling part.

Abstract: In a reader for a radio frequency identification (RFID) tag for near-field wireless communication, an antenna selection switch includes a plurality of antennae arranged with an extent within a predetermined range for transmitting and receiving data to and from an RFID tag, and selects one antenna to be used for transmission and reception of data from among the plurality of antennae. A detection part acquires, when a carrier wave transmitted from the RFID tag is received by any of the plurality of antennae, information indicative of an antenna selected by the antenna selection switch under the control of an antenna changeover controlling part.

Abstract: In a reader for a radio frequency identification (RFID) tag for near-field wireless communication, an antenna selection switch includes a plurality of antennae arranged with an extent within a predetermined range for transmitting and receiving data to and from an RFID tag, and selects one antenna to be used for transmission and reception of data from among the plurality of antennae. A detection part acquires, when a carrier wave transmitted from the RFID tag is received by any of the plurality of antennae, information indicative of an antenna selected by the antenna selection switch under the control of an antenna changeover controlling part.

Abstract: A laptop-type personal computer operable on power supplied from at least one of an AC adaptor and a battery pack includes a memory card loader configured to detachably load a memory card powered by at least one of the AC adaptor and the battery pack; a cover mechanism configured to cover and uncover the memory card loader; a detector configured to detect whether the memory card loader is covered by the cover mechanism; and a controller configured to control the power supply to a memory card loaded on the memory card loader when the cover mechanism uncovers the memory card loader.

Abstract: A laptop-type personal computer operable on power supplied from at least one of an AC adaptor and a battery pack includes a memory card loader configured to detachably load a memory card powered by at least one of the AC adaptor and the battery pack; a cover mechanism configured to cover and uncover the memory card loader; a detector configured to detect whether the memory card loader is covered by the cover mechanism; and a controller configured to control the power supply to a memory card loaded on the memory card loader when the cover mechanism uncovers the memory card loader.

Abstract: An attachment structure for an antenna which assures a good performance of the antenna and an electronic apparatus which can be miniaturized while assuring a good performance of an antenna are disclosed. The includes a display block capable of displaying various display screens thereon, and an attachment base made of a metal and having the display block attached thereto. The attachment base is positioned at least on the rear face side of the display block. The electronic apparatus further includes an antenna for performing radio communication therethrough. Each of the attachment base and the antenna has a positioning element provided thereon such that the positioning element of the antenna is positioned on and with respect to the positioning element of the attachment base to attach the antenna to the attachment base positioned on the rear face side of the display block.

Abstract: An attachment structure for an antenna which assures a good performance of the antenna and an electronic apparatus which can be miniaturized while assuring a good performance of an antenna are disclosed. The includes a display block capable of displaying various display screens thereon, and an attachment base made of a metal and having the display block attached thereto. The attachment base is positioned at least on the rear face side of the display block. The electronic apparatus further includes an antenna for performing radio communication therethrough. Each of the attachment base and the antenna has a positioning element provided thereon such that the positioning element of the antenna is positioned on and with respect to the positioning element of the attachment base to attach the antenna to the attachment base positioned on the rear face side of the display block.

Abstract: A display control system provided between a computer and a display device includes a plurality of display control LSI's for data transfer and also displays image data stored in a plurality of image memories having planes on the display device by controlling plane groups which include one or more planes. Each display control LSI includes an enable generator for generating a synchronization enabling signal in accordance with LSI designation information and an input/output buffer for outputting a synchronization signal in response to the enabling signal. A synchronization signal from one of the plurality of display control LSI's designated by the LSI designation information is supplied to the plurality of display control LSI's inclusive of the designated display control LSI through a signal line to allow the plurality of display control LSI's to operate with each other, thereby making it possible to produce and display data to be simultaneously on the display device.

Abstract: An internetworking apparatus which handles a scale of a network flexibly without degrading high speed operation. A router manager and a plurality of routing accelerator modules for performing routing are connected to one another through a high speed bus, and a plurality of communication ports are connected to the respective routing accelerators independently of one another. The plurality of routing accelerators can perform the routing for reception data packet at high speed. If more routing accelerators are provided, the disposal to the networks having a small scale to a large scale can be readily realized.

Abstract: A frame strip method for a bridge circuit for transparently forwarding data between a plurality of LANs (Local Area Network) without frame infinite circulation. The numbers of transmission/receive frames are counted. In counting the number, the validity/invalidity of a transmission frame is judged in accordance with the kind of the transmission frame. The validity/invalidity and strip/receive of a receive frame are judged in accordance with the kind of the receive frame. In accordance with the numbers of valid transmission/receive frames, a receive frame is stripped from the transmission line if the condition of (transmission frame number)>(receive frame number) is met.

Abstract: Frontend LANs connecting plural stations are connected to plural nodes of a backbone LAN respectively. The backbone LAN is constituted by plural physical or logical links, and each node corresponds to each frontend LAN. A first data block is segmented into one or plural second data block units of fixed length and transferred to destination nodes, a bridge is provided in order to assemble the second data blocks into the first data block. The bridge can transmit the second data blocks to arbitrary links, and the receiving is performed through one link. The bridge a decoder also has a decoder for decoding whether the learning should be performed or not, based on the learning indication information existing in the second data block including the routing information.

Abstract: The present invention relates to an address filter method and unit to be used in a bridge unit or the like for connecting networks. The address filter unit carries out an address filter processing between a plurality of networks by using address information extracted from an incoming information frame registered in an entry table. In order to improve the processing efficiency of the address filter processing, the address filter unit includes timers corresponding to each address information registration, timer updating means for sequentially and intermittently advancing each timer value, and means for deleting registration of the address information corresponding to the timers from the entry table when a timer value becomes equal to or above a predetermined value.