Abstract: There is provided a power supply method including an initial setting step of performing, by a charging control device, initial setting on a plurality of battery devices each including a secondary cell therein and a charging device performing contactless power transmission to transmit power to the battery devices that are provided in a stacked manner, a power transmission instruction step of providing, by the charging control device, an instruction to start the contactless power transmission from the charging device subjected to the initial setting in the initial setting step to the battery devices, a contactless power transmission step of performing the contactless power transmission from the charging device to the battery devices and a charging completion step of notifying, when charging of the battery devices is completed, the charging control device of completion of the charging by the battery devices.

Abstract: A housing contains a fuel cell, a lithium ion secondary cell, a wiring board on which a control circuit and the like are mounted, a light-emitting diode and the like. The bottom surface of the housing is covered with a bottom plate. A plurality of air-intake holes are formed in the bottom plate to supply air to the fuel cell. Two USB ports and are provided in the periphery of the housing. A plurality of air-discharge holes are formed in the upper portion of the periphery of the housing. Gas in the housing is discharged to the outside through the air-discharge holes. Furthermore, light from an LED provided in the housing works as an illumination for the fuel cartridge, which can facilitate checking of the fluid level of the fuel cartridge, thus, checking of the amount of remaining fuel.

Abstract: A wireless communication system capable of using a plurality of frequency channels in a first predetermined frequency band being adjacent a second predetermined frequency band used in another wireless communication system, the wireless communication system includes a base station and a mobile station. The base station sends a notification for limiting each power of the plurality of frequency channels to the mobile station. The mobile station transmits data to the base station by the use of at least one of the frequency channel, and controlling data transmitting power based upon the notification. When the frequency channel for the data transmitting need more transmitting power and the frequency channel for the data transmitting is adjacent to the second predetermined frequency band, the mobile station change the frequency channel for the data transmitting.

Abstract: A lighting apparatus is provided. The lighting apparatus includes a power supply housing section, a circuit board housing section, a light source housing section, a cutout portion, and a light source. An image recorded on a record medium is displayed in the state that an end portion of the power supply housing section and an end portion of the record medium secured to the cutout portion are placed on a surface where the lighting apparatus is placed.

Abstract: A projection type display apparatus that projects video onto a screen includes a liquid crystal panel using polymer-dispersed liquid crystal that disperses light when a voltage is applied and that transmits light when a voltage is not applied, being attached to an apparatus body 2 as a screen 1; and the video output from the apparatus body 2 is projected onto the screen 1 from the front side. Accordingly, there is provided the projection type display apparatus suitable for use in small space such as at home, in which a place for setting the apparatus is flexibly selected and the feeling of oppression is mitigated when the apparatus is not used.