Patents by Inventor Jong-wuk Ku
Jong-wuk Ku has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10218871Abstract: A plurality of light sources, an optical deflector including a rotational member configured to be rotational about an axis of rotation thereof, and a plurality of reflective members, are provided in a light scanning unit for an image forming apparatus. The optical deflector is arranged to deflect light incident obliquely from the plurality of light sources and the plurality of reflective members are arranged to reflect the light deflected by the optical deflector to a plurality of surfaces, which are to be scanned and correspond to the plurality of light sources, and arranged such that scan lines on opposite surfaces with respect to the axis of rotation of the optical deflector among the plurality of surfaces to be scanned are bent in the same direction.Type: GrantFiled: November 16, 2016Date of Patent: February 26, 2019Assignee: HP PRINTING KOREA CO., LTD.Inventor: Jong-Wuk Ku
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Publication number: 20170149994Abstract: A plurality of light sources, an optical deflector including a rotational member configured to be rotational about an axis of rotation thereof, and a plurality of reflective members, are provided in a light scanning unit for an image forming apparatus. The optical deflector is arranged to deflect light incident obliquely from the plurality of light sources and the plurality of reflective members are arranged to reflect the light deflected by the optical deflector to a plurality of surfaces, which are to be scanned and correspond to the plurality of light sources, and arranged such that scan lines on opposite surfaces with respect to the axis of rotation of the optical deflector among the plurality of surfaces to be scanned are bent in the same direction.Type: ApplicationFiled: November 16, 2016Publication date: May 25, 2017Applicant: S-PRINTING SOLUTION CO., LTD.Inventor: Jong-Wuk KU
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Patent number: 9075339Abstract: 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.Type: GrantFiled: September 5, 2014Date of Patent: July 7, 2015Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Heon-hee Lim, Jae-hwan Yoo, Jin-kwon Chun, Jong-wuk Ku
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Publication number: 20140376966Abstract: 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.Type: ApplicationFiled: September 5, 2014Publication date: December 25, 2014Applicant: Samsung Electronics Co., Ltd.Inventors: Heon-hee Lim, Jae-hwan Yoo, Jin-kwon Chun, Jong-wuk Ku
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Patent number: 8848014Abstract: 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.Type: GrantFiled: October 3, 2011Date of Patent: September 30, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Heon-hee Lim, Jae-hwan Yoo, Jin-kwon Chun, Jong-wuk Ku
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Patent number: 8570620Abstract: A light scanning unit and an electrophotographic image forming apparatus using the same. The light scanning unit uses a reduced number of optical components by forming an optical unit disposed between a light source and an optical deflector by using only a single lens and ensures optical and mechanical properties by having an appropriate main/sub scanning magnification ratio.Type: GrantFiled: September 16, 2010Date of Patent: October 29, 2013Assignee: Samsung Electronics Co., Ltd.Inventor: Jong-Wuk Ku
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Patent number: 8305673Abstract: Disclosed is a light scanning unit that includes an imaging optical system disposed between a beam deflector and a surface to be scanned. The imaging optical system includes two adjacent imaging optical devices that are inclined with respect to the light path. The inclination directions of the two adjacent imaging optical devices may be determined according to the number of reflection units that are disposed on the light path between the two adjacent imaging optical devices. The disclosed light scanning unit of the above configuration may advantageously exhibit reduced ghost images, reduced bowing of the scan line, improved beam diameter uniformity, and/or improved color registration.Type: GrantFiled: December 31, 2009Date of Patent: November 6, 2012Assignee: SAMSUNG Electronics Co., Ltd.Inventors: Heon-Hee Lim, Jong-Wuk Ku
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Publication number: 20120127252Abstract: 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.Type: ApplicationFiled: October 3, 2011Publication date: May 24, 2012Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Heon-hee Lim, Jae-hwan Yoo, Jin-kwon Chun, Jong-wuk Ku
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Publication number: 20110080624Abstract: A light scanning unit and an electrophotographic image forming apparatus using the same. The light scanning unit uses a reduced number of optical components by forming an optical unit disposed between a light source and an optical deflector by using only a single lens and ensures optical and mechanical properties by having an appropriate main/sub scanning magnification ratio.Type: ApplicationFiled: September 16, 2010Publication date: April 7, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Jong-Wuk Ku
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Publication number: 20100232835Abstract: An optical scanning unit that includes a first optical device that forms collimated light from light radiated from a light source, a second optical device that focuses the collimated light onto a deflector, and an imaging optical device that focuses light deflected by the deflector onto an exposure object. The optical scanning unit further includes a refraction unit and a diffraction unit, and the power of the refraction unit is ?r, the power of the diffraction unit is ?d, and the ratio ?r/?d is such that 0.5<?r/?d<1.3.Type: ApplicationFiled: May 19, 2010Publication date: September 16, 2010Applicant: Samsung Electronics Co., Ltd.Inventor: Jong-wuk Ku
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Patent number: 7750933Abstract: An optical scanning unit that includes a first optical device that forms collimated light from light radiated from a light source, a second optical device that focuses the collimated light onto a deflector, and an imaging optical device that focuses light deflected by the deflector onto an exposure object. The optical scanning unit further includes a refraction unit and a diffraction unit, and the power of the refraction unit is ?r, the power of the diffraction unit is ?d, and the ratio ?r/?d is such that 0.5<?r/?d<1.3.Type: GrantFiled: October 4, 2007Date of Patent: July 6, 2010Assignee: Samsung Electronics Co., Ltd.Inventor: Jong-wuk Ku
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Publication number: 20100165434Abstract: Disclosed is a light scanning unit that includes an imaging optical system disposed between a beam deflector and a surface to be scanned. The imaging optical system includes two adjacent imaging optical devices that are inclined with respect to the light path. The inclination directions of the two adjacent imaging optical devices may be determined according to the number of reflection units that are disposed on the light path between the two adjacent imaging optical devices. The disclosed light scanning unit of the above configuration may advantageously exhibit reduced ghost images, reduced bowing of the scan line, improved beam diameter uniformity, and/or improved color registration.Type: ApplicationFiled: December 31, 2009Publication date: July 1, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Heon-Hee LIM, Jong-Wuk KU
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Publication number: 20080292358Abstract: An optical scanning unit that includes a first optical device that forms collimated light from light radiated from a light source, a second optical device that focuses the collimated light onto a deflector, and an imaging optical device that focuses light deflected by the deflector onto an exposure object. The optical scanning unit further includes a refraction unit and a diffraction unit, and the power of the refraction unit is ?r, the power of the diffraction unit is ?d, and the ratio ?r/?d is such that 0.5<?r/?d<1.3.Type: ApplicationFiled: October 4, 2007Publication date: November 27, 2008Applicant: Samsung Electronics Co., Ltd.Inventor: JONG-WUK KU
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Publication number: 20080062495Abstract: A laser scanning unit includes a light source, a rotary polygon mirror to deflect a laser beam emitted from the light source, an f-theta lens to image the laser beam deflected from the rotary polygon mirror on a photoconductor, and a flat plate disposed between the light source and the photoconductor to correct a scanning line of the light source. The laser scanning unit can correct an inclination and/or a curvature of a scanning line caused by rotations of the rotary polygon mirror and the photoconductor and other working and assembling processes in order to minimize a deterioration in other performances, thereby allowing product quality to improve.Type: ApplicationFiled: March 22, 2007Publication date: March 13, 2008Applicant: Samsung Electronics Co., Ltd.Inventor: Jong-wuk KU
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Publication number: 20080002246Abstract: A laser scanning unit including a polygon mirror which has a plurality of reflecting faces reflecting an incident light onto a predetermined image forming part and is rotatably operated, a first light source scanning a first laser onto the reflecting faces at a predetermined scanning angle with respect to a centering line connecting a rotating axial line of the polygon mirror with a predetermined reference position on the image forming part, a second light source scanning a second laser symmetrical with the first laser with respect to the centering line onto the reflecting faces, a first F? lens which is positioned on the first optical path between the image forming part and the polygon mirror, and a second F? lens which is positioned on the second optical path between the image forming part and the polygon mirror, and has an optical characteristic symmetrical with the first F? with respect to the centering line.Type: ApplicationFiled: March 6, 2007Publication date: January 3, 2008Applicant: Samsung Electronics Co., Ltd.Inventor: Jong-wuk KU