Fujitsu Corporation

Kazuhito Fukuoka

Nobuo Tanaka

Hidekiyo Ozawa

Yoshiro Takeda

Haruhiko Mio

Yasunori Kanda

The device for charging a secondary battery, comprises: a measuring circuit for measuring the terminal voltage of the battery; a control circuit for controlling a charging current fed through the battery; and an abnormality determining portion which starts a preliminary charging of the battery (S ), finishes the charging (S ) when the voltage of the battery has reached a first threshold value which is decided based on the normal-state upper limit of the internal resistance and the current of the battery (S ), measures the open-circuit voltage of the battery after finishing the charging, determines that the battery is abnormal when the open-circuit voltage is less than a second threshold value (S ), determines that the battery is abnormal when the open-circuit voltage is larger than a third threshold value for detecting that the battery is abnormal (S ), and indicates that the battery is abnormal (S ).

Device and method for charging a secondary battery

An electronic apparatus system includes a battery pack housing batteries and a battery pack connection section connecting the battery pack to the electronic apparatus, the electronic apparatus operable with one of electric power from an external power supply and electric power from the battery pack. A pseudo battery pack includes a power holding unit holding electric power to be supplied to the electronic apparatus, wherein if the external power supply is used and the external power supply fails to supply the electric power, the pseudo battery pack is mounted on the battery pack connection section.

Pseudo battery pack, battery pack, electronic apparatus, and electronic apparatus system and method

Method and apparatus for creating multi-gradation data. The method and apparatus generates data having pixel values for respective pixels which comprise each of a plurality of characters in a font, and divides the respective pixels into a plurality of unit regions, a number of the respective pixels being obtained by multiplying a desired number of pixels by a number of pixels included in one unit region of the plurality of unit regions; extracts, for every unit region of the plurality of unit regions, the generated data; generates a multi-gradation data including a plurality of gradation values each gradually representing a different pixel brightness value, by converting, for every unit region, the data into the multi-gradation data in accordance with a plurality of pixel values included in the extracted unit region; and reduces the number of the respective pixels to the desired number of pixels by representing each unit region including the number of pixels with one pixel having a pixel value determined in accordance with the multi-gradation value.

Growing community of inventors

Kawasaki, Japan

Kazuhito Fukuoka