Abstract: Disclosed is a method for manufacturing a dry electrode. The method allows determination of the micro-fibrilization degree of a binder resin from the crystallinity of the binder resin. Based on this, the processing conditions of mixed powder for electrode or an electrode film may be controlled. In this manner, it is possible to check and control the processing conditions easily and efficiently. In addition, the method for manufacturing a dry electrode includes a kneading step using a kneader under a low speed and high temperature and pulverization step. Therefore, there is no problem of blocking of a flow path caused by aggregation of the ingredients, which is favorable to mass production.

Abstract: Disclosed herein is an apparatus and method for detecting an emotional change through facial expression analysis. The apparatus for detecting an emotional change through facial expression analysis includes a memory having at least one program recorded thereon, and a processor configured to execute the program, wherein the program includes a camera image acquisition unit configured to acquire a moving image including at least one person, a preprocessing unit configured to extract a face image of a user from the moving image and preprocess the extracted face image, a facial expression analysis unit configured to extract a facial expression vector from the face image of the user and cumulatively store the facial expression vector, and an emotional change analysis unit configured to detect a temporal location of a sudden emotional change by analyzing an emotion signal extracted based on cumulatively stored facial expression vector values.

Abstract: A light scanning unit includes a light source to emit a light beam; a polygonal mirror to deflect the light beam in a main scanning direction; and an imaging optical system to image the light beam onto a scanning surface. The polygonal mirror includes a plurality of reflection surfaces that are formed in an outer portion of the polygonal mirror and rotate around a rotational axis and an internal mirror surface that defines a hole. A ratio of an internal diameter d to an outer diameter D satisfies 0.1?d/D?0.3. The polygonal mirror is adhered to a motor unit that supports and rotates the polygonal mirror, using an adhesive. The internal mirror surface of the polygonal mirror defining the hole is point-bonded to the motor unit using the adhesive, and the point-bonding is conducted in a direction toward a corner of the reflection surfaces.

Abstract: A polygon mirror assembly, a light scanning unit employing the polygon mirror assembly, and an image forming apparatus. The polygon mirror assembly includes a polygon mirror formed of a plastic material and having a plurality of reflection surfaces; and a motor unit to support and rotate the polygon mirror, where the polygon mirror is coupled to the motor unit by using an adhesive material.

Abstract: A polygon mirror assembly, a light scanning unit employing the polygon mirror assembly, and an image forming apparatus. The polygon mirror assembly includes a polygon mirror formed of a plastic material and having a plurality of reflection surfaces; and a motor unit to support and rotate the polygon mirror, where the polygon mirror is coupled to the motor unit by using an adhesive material.

Abstract: A polygon mirror assembly, a light scanning unit employing the polygon mirror assembly, and an image forming apparatus. The polygon mirror assembly includes a polygon mirror formed of a plastic material and having a plurality of reflection surfaces; and a motor unit to support and rotate the polygon mirror, where the polygon mirror is coupled to the motor unit by using an adhesive material.

Abstract: A light scanning unit includes a light source to emit a light beam; a polygonal mirror to deflect the light beam in a main scanning direction; and an imaging optical system to image the light beam onto a scanning surface. The polygonal mirror includes a plurality of reflection surfaces that are formed in an outer portion of the polygonal mirror and rotate around a rotational axis and an internal mirror surface that defines a hole. A ratio of an internal diameter d to an outer diameter D satisfies 0.1?d/D?0.3. The polygonal mirror is adhered to a motor unit that supports and rotates the polygonal mirror, using an adhesive. The internal mirror surface of the polygonal mirror defining the hole is point-bonded to the motor unit using the adhesive, and the point-bonding is conducted in a direction toward a corner of the reflection surfaces.

Abstract: A polygonal mirror, a light scanning unit using the polygonal mirror, and an image forming apparatus. The polygonal mirror is formed of a plastic and includes a plurality of reflection surfaces that are formed in an outer portion of the polygonal mirror and rotate around a rotational axis, and an internal mirror surface that defines a hole, wherein a ratio of an internal diameter d to an outer diameter D satisfies 0.1?d/D?0.3.

Abstract: A polygonal mirror, a light scanning unit using the polygonal mirror, and an image forming apparatus. The polygonal mirror is formed of a plastic and includes a plurality of reflection surfaces that are formed in an outer portion of the polygonal mirror and rotate around a rotational axis, and an internal mirror surface that defines a hole, wherein a ratio of an internal diameter d to an outer diameter D satisfies 0.1?d/D?0.3.

Abstract: A polygon mirror assembly, a light scanning unit employing the polygon mirror assembly, and an image forming apparatus. The polygon mirror assembly includes a polygon mirror formed of a plastic material and having a plurality of reflection surfaces; and a motor unit to support and rotate the polygon mirror, where the polygon mirror is coupled to the motor unit by using an adhesive material.

Abstract: Provided are a semiconductor laser diode, and a printhead and an image forming apparatus including the semiconductor laser diode. The semiconductor laser diode includes a concave-convex pattern, and emits light having a Gaussian light intensity distribution. High quality images are provided by applying the semiconductor laser diode to a printhead and an image forming apparatus.

Abstract: A beam deflector having a base, the beam deflector including a polygon mirror to reflect a light beam, a mirror driving unit including a rotor shaft erected from the base and a rotor to support the polygon mirror and to rotate about the rotor shaft, a friction member to contact with and be separated from the rotor so as to obstruct and release rotation of the rotor, respectively, and a friction member driving unit to drive the friction member.

Abstract: A beam deflector having a base, the beam deflector including a polygon mirror to reflect a light beam, a mirror driving unit including a rotor shaft erected from the base and a rotor to support the polygon mirror and to rotate about the rotor shaft, a friction member to contact with and be separated from the rotor so as to obstruct and release rotation of the rotor, respectively, and a friction member driving unit to drive the friction member.

Abstract: A light scanning unit that corrects skew of a scanning line. The light scanning unit, which scans light on an exposed surface of a photosensitive medium, includes a light source to generate and illuminate at least one beam that corresponds to an image signal while being controlled on and off. A beam deflector deflects and scans a beam provided from the light source. A reflection mirror is obliquely arranged so that a scanning line directed to the exposed surface may be inclined with respect to a segment perpendicular to a transferring direction of the exposed surface to direct the scanning line to the exposed surface of the photosensitive medium by reflecting the scanning line provided from the beam deflector.

Abstract: Provided are an optical scanning device and a method for detecting a synchronization signal. In the optical scanning device, a beam incident on a scanning area of an object's surface to be scanned and a beam incident on a synchronization signal detector are emitted by a light source but deflected from different deflecting surfaces of a beam deflector.

Abstract: Provided is a light scanning apparatus, including a light source, a light source controller to control an on/off operation of the light source, a light deflector deflecting light emitted from the light source, an image formation optical system to direct light deflected by the light deflector on a scan area of a to-be-scanned surface, a synchronous signal detector to receive the light emitted from the light source and to detect a synchronous signal for light scanning, and a light path changer changing a path of light emitted from the light source and incident upon the light deflector.

Abstract: A multi-beam scanning unit is provided in which optical interference does not occur between a plurality of image-forming beams on an image-forming surface, and an image forming apparatus including the multi-beam scanning unit. The multi-beam scanning unit comprises a light unit having a plurality of light-emitting points for irradiating laser beams, and a light unit controller controlling the light-emitting points so that the adjacent light-emitting points do not start light emission simultaneously. A beam deflector deflects laser beams irradiated by each of the light-emitting points on a photosensitive medium.

Abstract: A light scanning apparatus is provided. The light scanning apparatus includes a beam splitter, which is located between a polygonal mirror and an f? lens and reflects a portion of light incident thereon to the polygonal mirror. A laser beam reflected from the beam splitter is reflected by the polygonal mirror and incident on the f? lens. The path of a laser beam incident on the polygonal mirror and the path of the laser beam reflected from the polygonal mirror are at the same level with each other. Therefore, by installing a beam splitter in a laser scanning apparatus, it is possible to reduce the length of each reflective surface of the polygonal mirror in a main scanning direction without increasing the length of each reflective surface of the polygonal mirror in a sub scanning direction. In addition, it is possible to perform high-speed scanning while making less noise.

Abstract: Provided is a light scanning apparatus, including a light source, a light source controller to control an on/off operation of the light source, a light deflector deflecting light emitted from the light source, an image formation optical system to direct light deflected by the light deflector on a scan area of a to-be-scanned surface, a synchronous signal detector to receive the light emitted from the light source and to detect a synchronous signal for light scanning, and a light path changer changing a path of light emitted from the light source and incident upon the light deflector.

Abstract: Provided is a light scanning apparatus, including a light source, a light source controller to control an on/off operation of the light source, a light deflector deflecting light emitted from the light source, an image formation optical system to direct light deflected by the light deflector on a scan area of a to-be-scanned surface, a synchronous signal detector to receive the light emitted from the light source and to detect a synchronous signal for light scanning, and a light path changer changing a path of light emitted from the light source and incident upon the light deflector.