Samsung Electronics Co., Ltd.

Samsung Electro-mechanics Co., Ltd.

Hewlett-packard Development Company, L.p.

Jun-o Kim

Hee-moon Jeong

Jin-han Kim

Young-dae Ko

Tatsuhiro Otsuka

Keon Kuk

Dae-Hwan Kim

Sang-Hun Lee

Sang-Wook Kwon

Yong-hwa Park

Jin-woo Cho

Jong-seok Kim

Che-Heung Kim

Young-tack Hong

In-sang Song

Sang-Woo Lee

Jong-Chul Choi

Jin-ho Lee

Kyung-hwan Kim

Byung-sang Yun

Seok-mo Chang

Kyoung-ho Ha

Woo-sup Han

Yong-kyu Byun

Yong-Kweun Mun

Seok-chul Yun

Kyu-yong Kim

Young-Chul Ko

Byeung-leul Lee

Seok-Mo Chang

Ji-Yoon Kang

Woo-hyek Choi

The apparatus includes a heating roller that generates heat for melting toner attached to a printing medium; a first induction coil that is disposed outside the heating roller and heats the heating roller by using induced current generated according to current flowing through the first induction coil; two second induction coils that are disposed at upper portions of both ends of the first induction coil and heat the heating roller by using induced current generated according to current flowing through the two second induction coils; a power supply unit that supplies current to the first induction coil and the two second induction coils; and a control unit that controls the power supply unit to supply current flowing in the same direction or different directions to the first induction coil and the second induction coils according to the size of paper fed into the heating roller.

Apparatus and method to control temperature of heating roller used in fusing device of image forming apparatus

An induction heating type fusing device and an image forming apparatus including the fusing device. The fusing device includes a magnetic flux generator and a compressing roller outside a fusing belt, first and second fusing rollers and a nip guide inside the fusing belt. The compressing roller compresses against the first and second fusing rollers and the nip guide to form nips, while the fusing belt is disposed between the compressing roller and the first and second fusing rollers and the nip guide.

Induction heating type fusing device and image forming apparatus employing the same

A heating roller including a resistive heating layer and a fusing device including the heating roller. By separately disposing a plurality of electrodes in an axis direction of the heating roller, and by independently controlling each electrode, the heating roller may correspond to various papers having different sizes. Accordingly, the temperature of the heating roller may be stably controlled.

Fusing device of an electrophotography image forming apparatus including a heating roller

Disclosed are several embodiments of a micro-electro-mechanical systems (MEMS) mirror and a mirror scanner employing the same. An optical scanning unit employing such mirror scanner and an image forming apparatus including the optical scanning unit are also disclosed. The MEMS mirror may include a movable unit, which may in turn include a mirror portion and a magnet frame portion. The mirror portion may have mirror surfaces on the face surface(s) thereof. The magnet frame portion may include an opening into which a magnet is received. The MEMS mirror may also include a first fixing end and a second fixing end, to which the moving unit may be elastically supported by one or more elastic members that allows oscillating or pivoting movement of the moving unit.

MEMS mirror, mirror scanner, optical scanning unit and image forming apparatus including the optical scanning unit

The present invention provides a heating roller including a resistive heating layer and a fusing device including the heating roller. By separately disposing a plurality of electrodes in an axis direction of the heating roller, and by independently controlling each electrode, the heating roller may correspond to various papers having different sizes. Accordingly, the temperature of the heating roller may be stably controlled.

Heating roller having resistive heating element and fusing device including heating roller

Disclosed are an image forming apparatus capable of, and method of, improving color registration. The image forming apparatus can employ a beam deflector having a double-sided mirror portion that pivots to bi-directionally scan multiple light beams on multiple photosensitive media at different phases by using both mirror sides of the double-sided mirror portion. The individual monochromic images developed on the photosensitive media are transferred onto a transfer medium to overlap one another in phase to form a full color image.

Image forming apparatus and method of correcting color registration

A microelectromechanical systems (MEMS) device includes a frame, an actuator formed on the same layer as the frame and connected to the frame to be capable of performing a relative motion with respect to the frame, and at least one stopper restricting a displacement of the actuator in a direction along the height of the actuator. The MEMS device is fabricated by bonding a second substrate to a first substrate, forming the frame and the actuator by partially removing the first substrate, and forming the at least one stopper by partially removing the second substrate.

MEMS device and fabrication method of the same

A 2-axis driving electromagnetic scanner, having a structure in which a mirror is separated from a driving unit and directly driven, is provided. The electromagnetic scanner includes: an outer driving unit which is capable of rotating around a first axis; an inner driving unit which is suspended from the outer driving unit so as to rotate around a second axis perpendicular to the first axis; and a stage which is located on an upper surface of the inner driving unit so as to rotate together with the inner driving unit. In the electromagnetic scanner, the stage is connected to the inner driving unit by a link unit protruding from a center of a lower surface of the stage.

2-axis driving electromagnetic scanner

A vertical comb actuator radio frequency (RF) micro-electro-mechanical system (MEMS) switch. The RF MEMS switch includes a substrate; first and second signal lines spaced at a predetermined interval from each other and deposited on an upper surface of the substrate; an actuator positioned over the first and second signal lines when viewed from the upper surface of the substrate and spaced at a predetermined interval from the first and second signal lines; and a fixing portion positioned over the actuator when viewed from the upper surface of the substrate, wherein the fixing portion permits the actuator to come in contact with the first and second signal lines when a predetermined driving voltage is applied. Thus, it is possible to prevent the actuator from sticking to the substrate. In addition, the RF MEMS switch can be operated with a low voltage and insertion loss and power loss can be reduced.

Vertical comb actuator radio frequency micro-electro-mechanical system switch

A speckle reduction laser and a laser display apparatus having the speckle reduction laser are provided. The speckle reduction laser includes a semiconductor unit that comprises an active layer and emits laser light through a first side surface thereof by resonating light generated from the active layer, and a vibration mirror unit disposed adjacent to a second side surface of the semiconductor unit. The laser further includes a mirror, and the resonance of the laser light is generated between the first side surface of the semiconductor unit and the mirror, and a resonance mode of the laser light is changed according to the vibration of the mirror.

Speckle reduction laser and laser display apparatus having the same

A MEMS switch including a substrate at least one fixed electrode formed on top of the substrate and at least one restoring electrode formed on top of the substrate and formed at a lateral surface of the fixed electrode. At least one signal line is formed on top of the substrate and has a switching contact part. A movable electrode is distantly connected from the top of the substrate at a predetermined space via an elastic connector on the substrate and at least one contact member formed on a bottom surface of the movable electrode or on a bottom surface of the elastic connector for attachment to or detachment from the switching contact part. At least one pivot boss is formed on either the bottom surface of the movable electrode or on the top of the substrate.

MEMS switch and manufacturing method thereof

An RF MEMS switch having asymmetrical spring rigidity. The RF MEMS switch has supporting members spaced apart in a certain interval on a substrate, a membrane being a motion member suspended by plural spring members extended on both sides of the membrane, and a bottom electrode being a contact surface on an upper surface of the substrate facing a bottom surface of the membrane, wherein the plural spring members placed on opposite sides of the membrane have asymmetrical rigidity, and a portion of the membrane on a side of stronger spring rigidity is first separated from the contact surface when the RF MEMS switch is turned off. The present invention has an advantage of easy separation of the switch from the contact surface, when the switch is turned off, due to the different rigidity of the springs located on the sides of the membrane.

Growing community of inventors

Yongin-si, South Korea

Jun-o Kim