Hewlett-Packard Development Company, L.p.

Samsung Electro-Mechanics Co., Ltd.

Jong Hwa Park

Jong Hyun Park

Mitsuru Oikawa

Dong Geun Lee

Jeong Hyun Lee

Min Su Han

Jang Hyun Son

A developing device including a developing roller mounted in a developing chamber is provided. In the developing device, the developing roller is partially exposed to an environment outside the developing chamber through an opening portion of the developing chamber, an air inlet is provided between an upstream boundary of the opening portion in a rotational direction of the developing roller and an outercircumference of the developing roller, wherein air may pass into the developing chamber through the air inlet, and an air outlet may be formed near the upstream boundary of the opening portion and communicatively connected to the developing chamber so as to discharge the air in the developing chamber. The air outlet is located outside an effective image area in a length direction of the developing roller.

Developing device having air outlet

A developing device comprising a developer transporting unit including a developer inlet through which a developer is reintroduced, a developer outlet through which the developer is discharged, and a developing roller mounted in the developer transporting unit; and a developer circulator including a first connection opening connected to the developer outlet, to receive the developer discharged through the developer outlet, a second connection opening connected to the developer inlet to reintroduce the developer through the developer inlet into the developer transporting unit, a waste opening through which the developer is discarded, and a guide member mounted in the developer circulator to selectively guide the developer received through the first connection opening to the second connection opening or to the waste opening.

Developer circulator to guide developer

A solenoid driving apparatus for a compact disc player (CDP) for use in cars which enables the CDP to operate effectively and to continue to a following operation smoothly utilizing a latch type solenoid. The apparatus includes a disc detecting section for detecting an insertion state of a compact disc into the CDP to produce first and second detection signals, a microcomputer for receiving the first and second detection signals from the disc detecting section and producing first and second control signals in accordance with the first and second detection signals, a motor driving section for providing a driving force to a driving mechanism of the CDP in accordance with the first control signal of the microcomputer, and a solenoid driving section for driving the latch type solenoid for a predetermined time when the second control signal of the microcomputer is supplied to the solenoid driving section.

Solenoid driving circuit for compact disc players for cars

Growing community of inventors

Suwon, South Korea

Jong Hwa Park