Patent application number | Description | Published |
20090111510 | MULTIMODE PORTABLE TERMINAL AND MODE SWITCH-OVER METHOD - [PROBLEMS] To provide a multimode portable terminal capable of variously switching over the mode of a network connection according to various needs such as high-quality and high-speed data communication or inexpensive data communication, and a mode switch-over method. [MEANS FOR SOLVING THE PROBLEMS] A multimode portable terminal capable to any one of a plurality of radio communication networks with different standards includes a mode selecting device | 04-30-2009 |
20110058503 | RADIO COMMUNICATION SYSTEM, BASE STATION, INTER-BASE STATION SYNCHRONIZATION METHOD, AND PROGRAM - A radio communication system includes a terminal and base stations that transmit subframes to and receive subframes from said terminal by means of OFDMA/TDD. The base stations include a first base station and a second base station that is adjacent to the first base station and that establishes frame synchronization with the first base station. The second base station: receives a specific uplink signal contained in an uplink subframe that is transmitted to the first base station from the terminal that is located at the cell boundary of the first base station and the second base station; based on the timing of the reception of the specific uplink signal, estimates the timing of the transmission of the header of uplink subframes transmitted from the terminal; and based on the timing of the transmission of the header of the uplink subframes that was estimated, controls the timing of the transmission of downlink subframes that are transmitted to the terminal. | 03-10-2011 |
20110243086 | RADIO COMMUNICATION SYSTEMS, BASE STATION DEVICES, AND CHANNEL ALLOCATION METHOD - One region of a plurality of regions into which channels are divided over the radio link as a main region is designated for each of groups into which the cells of the plurality of base stations are divided. When a mobile terminal receives a signal from a second base station other than a first base station to which the own mobile terminal is connected, the mobile terminal notifies the first base station of adjacent status information that represents a group to which a cell of the second base station belongs. The first base station allocates a channel that belongs to a region other than the main region of the group represented by the adjacent status information that the mobile terminal notifies to the first base station. | 10-06-2011 |
20140006835 | PROCESSING DEVICE AND CONTROL METHOD FOR SAME | 01-02-2014 |
Patent application number | Description | Published |
20090123804 | Polymer Electrolyte Membrane For Solid Polymer Fuel Cell, Membrane-Electrode Assembly And Fuel Cell - This invention relates to a polymer electrolyte membrane for polymer electrolyte fuel cells, comprising a block copolymer which comprises, as its constituents, a polymer block (A) having as a main unit an aromatic vinyl compound unit whose α-carbon is quaternary carbon, and a flexible polymer block (B), and has ion-conducting groups on the polymer block (A). | 05-14-2009 |
20100098997 | POLYMER ELECTROLYTE MEMBRANE AND PROCESS FOR PREPARATION THEREOF, AND MEMBRANE-ELECTRODE ASSEMBLY AND POLYMER ELECTROLYTE FUEL CELL - A polymer electrolyte membrane comprising as a main ingredient a block copolymer (P) which comprises, as its constituents, a vinyl alcoholic polymer block (A) and a polymer block (B) having ion-conducting groups, which block copolymer | 04-22-2010 |
20100159353 | POLYMER ELECTROLYTE, POLYMER ELECTROLYTE MEMBRANE, MEMBRANE-ELECTRODE ASSEMBLY AND POLYMER ELECTROLYTE FUEL CELL - Disclosed are: a polymer electrolyte which comprises, as the main component, a block/graft copolymer comprising, as constituent components, polymer blocks (A), (B) and (C) which cause phase-separation from one another, wherein the polymer block (A) comprises a vinyl compound unit as the main repeating unit and has an ion-conductive group, the polymer block (B) comprises a vinyl compound unit capable of forming a flexible phase as the main repeating unit and forms a flexible phase, and the polymer block (C) comprises a styrene derivative unit carrying an alicyclic hydrocarbon group having a polycyclic structure as the main repeating unit and forms a restrained phase; a membrane; a membrane-electrode assembly; and a solid polymer fuel cell. The polymer electrolyte has excellent durability and heat resistance, and shows little change in properties, such as the change in dimension between a dried state and a wet state, the change in mechanical properties and the change in methanol cross-over before and after the immersion in a methanol solution. The polymer electrolyte can be used stably in a solid polymer fuel cell during the long-term operation of the solid polymer fuel cell and enables excellent start-up performance of the solid polymer fuel cell. | 06-24-2010 |
20100167159 | POLYELECTROLYTE FILM, FILM-ELECTRODE ASSEMBLY, AND SOLID-POLYMER-TYPE FUEL CELL - A polymer electrolyte membrane comprising as a main ingredient a block copolymer which comprises, as its constituents, a polymer block (A) having as a main unit an aromatic vinyl compound unit and a polymer block (B) forming a flexible phase, and has ion-conducting groups on the polymer block (A), said aromatic vinyl compound unit being such that the hydrogen atom bonded to the α-carbon atom is non-replaced or replaced with an alkyl group or an aryl group optionally having substituent(s), and at least one of hydrogen atoms directly bonded to the aromatic ring is replaced with an alkyl group; and a membrane electrode assembly and a polymer electrolyte fuel cell both of which uses it. The polymer block (A) can have a restraining phase, and/or can be cross-linked. The electrolyte membrane is mild to the environment, has a high ion conductivity and good bonding properties to electrodes, is excellent in moldability, and is not easily influenced by methanol; and displays excellent performance in polymer electrolyte fuel cells, particularly direct methanol fuel cells. | 07-01-2010 |
20100233569 | ELECTROLYTE MULTILAYER MEMBRANE FOR SOLID POLYMER FUEL CELL, MEMBRANE-ELECTRODE ASSEMBLY, AND FUEL CELL - A multilayer electrolyte membrane for polymer electrolyte fuel cells, consisting of a laminate of at least two polymer electrolyte membranes at least one of which membranes comprises a block copolymer (I) which comprises, as its constituents, a polymer block (A) having as a main unit an aromatic vinyl compound unit and a flexible polymer block (B), and has ion-conducting groups on polymer block (A); and a membrane electrode assembly and a polymer electrolyte fuel cell. The multilayer membrane is economical, mild to the environment, and has high ion conductivity and high methanol barrier properties, together. It is preferred, from the object, that at least two of the constitutive electrolyte membranes comprise block copolymer (I), and/or at least one of the constitutive electrolyte membranes has an ion exchange capacity of 0.7 meq/g or more and at least one of them has an ion exchange capacity of less than 0.7 meq/g. | 09-16-2010 |
20100310965 | MEMBRANE-ELECTRODE ASSEMBLY AND POLYMER ELECTROLYTE FUEL CELL - A membrane-electrode assembly for polymer electrolyte fuel cells comprising a polymer electrolyte membrane and two gas diffusion electrodes being bonded to the membrane so that the membrane can be between them, in which assembly each gas diffusion electrode is comprised of an electrode catalyst layer and a gas diffusion layer, intermediate layer(s) being an ion conductor is/are arranged between the electrode catalyst layer(s) and the membrane, the ion conductor mainly comprises a block copolymer comprising a polymer block (A) having ion-conductive groups and a polymer block (B) having no ion-conductive group, both blocks phase-separate from each other, (A) forms a continuous phase, and the contact part(s) of the intermediate layer(s) with the polymer electrolyte membrane and the contact part(s) of the intermediate layer(s) with the electrode catalyst layer(s) are comprised of polymer block (A) having ion-conductive groups; and a polymer electrolyte fuel cell wherein the assembly is used. By the invention, a membrane-electrode assembly and a fuel cell are provided which are economical, environment-friendly, good in moldability, and small in interface resistance and excellent in power generation efficiency. | 12-09-2010 |
20100323269 | CATALYST LAYER AND PREPARATION PROCESS THEREOF, AND MEMBRANE-ELECTRODE ASSEMBLY AND POLYMER ELECTROLYTE FUEL CELL USING THE CATALYST LAYER - In a membrane-electrode assembly for polymer electrolyte fuel cells comprising a polymer electrolyte membrane and two gas diffusion electrodes being bonded to the membrane so that the membrane can be between them, at least one catalyst layer constituting the gas diffusion electrodes characterized in that the ion-conductive binder comprises a block copolymer having a particle size of 1 μm or less comprising a polymer block (A) having ion-conductive groups and a polymer block (B) having no ion-conductive group, both polymer blocks phase separate from each other, polymer block (A) forms a continuous phase, and the contact parts of the block copolymer with catalyst particles are comprised of polymer block (A) having ion-conductive groups; a membrane-electrode assembly and a polymer electrolyte fuel cell. | 12-23-2010 |
20110300469 | ELECTROLYTE MEMBRANE AND MEMBRANE-ELECTRODE ASSEMBLY - An electrolyte membrane having a structure wherein fine rubber particles having substantially no ion-conducting group and having an average particle size of 20 nm to 1 μm are uniformly dispersed in a matrix including a resin component having ion-conducting group. The electrolyte membrane has high bonding ability to electrodes and does not cause cracks and ruptures because it is kept flexible even under low humid or absolutely dried condition, in addition, shows high ion conductivity even under low humid or absolutely dried condition because the matrix having ion-conducting groups are continuous. | 12-08-2011 |