Panasonic Corporation

Kyocera Document Solutions Inc.

Kazuki Yoshioka

Eiichi Sadayuki

Masahiko Mizuno

George Nakane

Rei Yamagishi

Yoshitaka Mano

An image forming apparatus includes a toner cartridge that supplies toner to an image carrier. The toner cartridge includes a development unit that is connected to a toner container via a connection hole, and has an external opening for supplying the toner to the image carrier, an outer shutter that opens and closes the external opening, an inner shutter that opens and closes the connection hole, and a gear mechanism that connects the outer shutter and the inner shutter to be capable of interlocking with each other. When outer shutter is in a first closing position to close the external opening, the inner shutter is in a second closing position to close the connection hole. When the outer shutter is in a first opening position to open the external opening, the inner shutter is in a second opening position to open the connection hole.

Toner cartridge and image forming apparatus

An image forming apparatus includes a drum unit, a developing unit, a developing roller bearing, a guide portion, and an urging portion. The drum unit includes a photosensitive drum. The developing unit includes a developing roller. The developing roller bearing supports the developing roller and can move radially and rotate axially with respect to the developing unit. The guide portion is formed in the drum unit and guides the developing roller bearing in directions toward and away from the photosensitive drum. The urging portion urges the developing unit in such a direction that it presses the developing roller against the photosensitive drum. The developing unit includes a restriction portion that restricts the rotation of the developing roller bearing with respect to the developing unit within a predetermined range.

Image forming apparatus

A power source generation circuit includes a regulator circuit which receives an external power source voltage VDDA from an external power source, and generates a predetermined internal power source voltage on a given terminal VDD; and a charging circuit which connects the external power source and the given terminal when the external power source voltage VDDA supplied from the external power source is equal to or lower than a predetermined threshold voltage.

Power source generation circuit and integrated circuit

In a semiconductor device, a self-test circuit includes a write part for writing data in a given address of a special region of a nonvolatile memory; a read part for reading the written data from the given address; a verify part for determining whether or not the written data accords with the read data; and a decision part for determining soundness of the nonvolatile memory on the basis of a result of determination made by the verify part. In the case where the written data accords with the read data, the decision part determines that the nonvolatile memory is sound, and in the case where the data do not accord with each other, it determines that the nonvolatile memory is unsound.

Memory self-test circuit, semiconductor device and IC card including the same, and memory self-test method

A semiconductor device according to the present invention comprises a first non-volatile memory, a second non-volatile memory in which initial data is stored, and an initialization controller for initializing the first non-volatile memory, wherein the second non-volatile memory has anti-stress properties higher than those of the first non-volatile memory, and the initialization controller reads the initial data from the second non-volatile memory when the first non-volatile memory is initialized and copies the read initial data in the first non-volatile memory to thereby initialize the first non-volatile memory.

Growing community of inventors

Osaka, Japan

Kazuki Yoshioka