Patents by Inventor Hong-chul Shin

Hong-chul Shin 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).

  • Publication number: 20130300328
    Abstract: Disclosed herein are a switching control apparatus for two phase switched reluctance motor and a method thereof. The switching control apparatus includes a rectifier rectifying commercial power; and an active converter including a pair of common switches commonly connected to two phase windings of two phase SRMs, a pair of first phase switches bridge-connected to the pair of common switches at any one of the two phase windings, a pair of second phase switches bridge-connected to the pair of common switches at the other one of the two phase windings, and a plurality of current feedback diodes each connected to the switches, wherein the active converter is operated in operation modes 1 to 3 to drive the two phase SRM.
    Type: Application
    Filed: August 31, 2012
    Publication date: November 14, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Se Joo Kim, Han Kyung BAE, Hyung Joon KIM, Hong Chul SHIN
  • Publication number: 20130293170
    Abstract: Disclosed herein are a switching control apparatus and method of a two-phase switched reluctance motor. The witching control apparatus includes: a rectifying unit rectifying commercial power; and an active converter including a pair of common switches commonly connected to two phase windings of the two-phase SRM, a pair of first phase switches bridge-connected to the pair of common switches at any one of the two phase windings, a pair of second phase switches bridged-connected to the pair of common switches at the other of the two phase windings and connected in series with each other, and a plurality of current feedback diodes each connected to the switches and operated in operation modes 1 to 3 to drive the two-phase SMR.
    Type: Application
    Filed: August 21, 2012
    Publication date: November 7, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Hong Chul SHIN, Han Kyung BAE, Hyung Joon KIM, Guen Hong LEE
  • Patent number: 8551679
    Abstract: A toner including a plurality of fine particles includes a core including first latex particles, a wax and a pigment, or a first latex particle-wax complex and a pigment, and a first shell layer including second latex particles and covering at least a portion of the surface of the core, a method of preparing the toner, a method of forming images using the toner, and an image forming device including a toner transferring unit. The toner can have improved fixing and charging properties, preserving properties at a high temperature and high humidity, glossness and anti-offset properties by reducing a domain size of a wax dispersed in the toner and improving dispersibility of the wax.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: October 8, 2013
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventors: Kyeong Pang, Hong-chul Shin, Kyung-yoi Yon
  • Publication number: 20130236824
    Abstract: A toner to develop electrostatic latent images, which has surface characteristics that may simultaneously improve charge uniformity, charge stability, transferability, and cleaning ability. The toner to develop electrostatic latent images may include core particles comprising a binder resin, a colorant, and a releasing agent; and an external additive including silica particles and titanium dioxide particles, wherein the external additive is attached to external surfaces of the core particles, wherein an iron intensity [Fe], a silicon intensity [Si], and a titanium intensity [Ti] that are measured by X-ray fluorescence (XRF) satisfy both conditions, 0.004?[Si]/[Fe]?0.009 and 0.8?[Ti]/[Fe]?2.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 12, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Se-young YOON, Sung-jin PARK, Hong-chul SHIN, Seung-sik WOO, Hae-ree JOO
  • Patent number: 8492061
    Abstract: The disclosure provides electrophotographic toner and a method of preparing the same. The toner includes a latex, a colorant, and a releasing agent, wherein the toner has a weight-average molecular weight of about 50,000 to about 80,000; a complex viscosity of about 1×103 to about 5×104 (Pa·s) at a temperature ranging from about 100° C. to about 140° C.; and a storage modulus Pa (dG?) to a loss modulus Pa (dG?) (dG?/dG?) ratio of about 1.10 to about 1.25.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: July 23, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-Hyeuk Jeong, Kyeong Pang, Jung-Ik Choi, Soon-Cheol Jeong, Hong-Chul Shin
  • Publication number: 20130181641
    Abstract: Disclosed herein is a unipolar switching apparatus of a switched reluctance motor, including: a control unit outputting a unipolar switching control signal; and a transformer driving an SRM according to the unipolar switching control signal output from the control unit, thereby minimizing vibration and noise.
    Type: Application
    Filed: August 13, 2012
    Publication date: July 18, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Se Joon Kim, Sung Tai Jung, Han Kyung Bae, Hong Chul Shin, Guen Hong Lee
  • Publication number: 20130106337
    Abstract: Disclosed herein are an apparatus and a method of driving a switched reluctance motor. The apparatus includes: a power supply unit; N pairs of coils; N pairs of upper switch devices each connected in series with an upper portion of each of the N pairs of coils; N pairs of lower switch devices each connected in series with a lower portion of each of the N pairs of coils; 2N first freewheel diodes; 2N second freewheel diodes; and a switch driving unit providing a control signal to the N pairs of upper switch devices and the N pairs of lower switch devices to sequentially supply current to the N pairs of coils.
    Type: Application
    Filed: February 23, 2012
    Publication date: May 2, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Changsung Sean Kim, Guen Hong Lee, Hong Chul Shin, Han Tae Kim, Han Kyung Bae
  • Publication number: 20130094686
    Abstract: A portable terminal is provided. The portable terminal includes a display panel, a case member provided to surround at least both sides of the display panel, and a speaker hole formed in the case member and opened to at least one side of the display panel. The portable terminal includes the speaker hole in at least a side of the display panel by changing only a structure of the case member, such that the volume and quality of sound output from the speaker device can be fully delivered to a user who uses the terminal while viewing the display panel.
    Type: Application
    Filed: September 13, 2012
    Publication date: April 18, 2013
    Applicant: SAMSUNG ELECTRONICS CO. LTD.
    Inventors: Hong-Chul SHIN, Jae-Han LEE, Seung-Hyun LEE, Soon-Ik CHO
  • Publication number: 20130082548
    Abstract: Disclosed herein is a switched reluctance motor in which a position detection part capable of detecting a rotational position of the rotor part is formed in a balancing member coupled to a rotor part and a sensor part is positioned at a position corresponding to that of the position detection part and on a cover surface of an inner side of the motor housing. According to a preferred embodiment of the present invention, the sensor part is positioned in the motor housing, thereby making it possible to protect the sensor part and improve reliability in sensing of a rotational position of the rotor part by the sensor part.
    Type: Application
    Filed: June 12, 2012
    Publication date: April 4, 2013
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Hyung Joon Kim, Han Kyung Bae, Jin Wook Baek, Se Joo Kim, Tae Ho Yun, Hong Chul Shin
  • Publication number: 20130057091
    Abstract: Disclosed herein is a switched reluctance motor having a double rotor structure. An out stator salient pole corresponding to an out rotor salient pole is formed to have an “E” shape by sequentially disposing a main salient pole, a first auxiliary salient pole, and a second auxiliary salient pole and an in stator salient pole corresponding to an in rotor salient pole is formed to have a pi (?) shape by sequentially disposing a first salient pole and a second salient pole, such that a magnetic flux path is reduced, thereby making it possible to prevent the loss of magnetic force.
    Type: Application
    Filed: November 29, 2011
    Publication date: March 7, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Changsung Sean Kim, Guen Hong Lee, Chang Hwan Choi, Han Kyung Bae, Hong Chul Shin
  • Patent number: 8232034
    Abstract: The disclosure provides an electrophotographic toner and methods for preparing the electrographic toner. The electrographic toner includes a binder, a colorant and a releasing agent, wherein the electrophotographic toner includes strontium (Sr), iron (Fe), titanium (Ti), and silicon (Si) containing particles; wherein, if [Sr], [Fe], [Ti] and [Si] denote the intensities of Sr, Fe, Ti, and Si in the electrophotographic toner, respectively, as measured by X-ray fluorescence spectrometry, then the [Sr]/[Fe] ratio is in the range of about 5.0×10?1 to about 4.5, the [Ti]/[Fe] ratio is in the range of about 5.0×10?1 to about 8.1×10?1, and the [Si]/[Fe] ratio is in the range of about 2.0×10?3 to about 4.0×10?3.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: July 31, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyung-yeon Kang, Sang-yup Kim, Hong-chul Shin, Sung-jin Park
  • Publication number: 20120171602
    Abstract: Disclosed is a toner for developing an electrostatic charge image, including a toner particle coated with a combination of sol-gel silica particles, hydrophobically surface-treated fumed silica particles, and hydrophobically surface-treated titanium dioxide particles.
    Type: Application
    Filed: December 15, 2011
    Publication date: July 5, 2012
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Se-young Yoon, Song-Won Hyun, Hong-Chul Shin, Sung-dong Lee, Jong-in Kim
  • Publication number: 20110159427
    Abstract: The disclosure provides an electrophotographic toner and methods for preparing the electrographic toner. The electrographic toner includes a binder, a colorant and a releasing agent, wherein the electrophotographic toner includes strontium (Sr), iron (Fe), titanium (Ti), and silicon (Si) containing particles; wherein, if [Sr], [Fe], [Ti] and [Si] denote the intensities of Sr, Fe, Ti, and Si in the electrophotographic toner, respectively, as measured by X-ray fluorescence spectrometry, then the [Sr]/[Fe] ratio is in the range of about 5.0×10?1 to about 4.5, the [Ti]/[Fe] ratio is in the range of about 5.0×10?1 to about 8.1×10?1, and the [Si]/[Fe] ratio is in the range of about 2.0×10?3 to about 4.0×10?3.
    Type: Application
    Filed: August 10, 2010
    Publication date: June 30, 2011
    Applicant: Samsung Electronics co., Ltd.
    Inventors: Kyung-yeon KANG, Sang-yup Kim, Hong-chul Shin, Sung-jin Park
  • Publication number: 20100167194
    Abstract: The disclosure provides electrophotographic toner and a method of preparing the same. The toner includes a latex, a colorant, and a releasing agent, wherein the toner has a weight-average molecular weight of about 50,000 to about 80,000; a complex viscosity of about 1×103 to about 5×104 (Pa·s) at a temperature ranging from about 100° C. to about 140° C.; and a storage modulus Pa (dG?) to a loss modulus Pa (dG?) (dG?/dG?) ratio of about 1.10 to about 1.25.
    Type: Application
    Filed: November 4, 2009
    Publication date: July 1, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-Hyeuk JEONG, Kyeong Pang, Jung-Ik Choi, Soon-Cheol Jeong, Hong-Chul Shin
  • Publication number: 20090155700
    Abstract: A toner including a plurality of fine particles includes a core including first latex particles, a wax and a pigment, or a first latex particle-wax complex and a pigment, and a first shell layer including second latex particles and covering at least a portion of the surface of the core, a method of preparing the toner, a method of forming images using the toner, and an image forming device including a toner transferring unit. The toner can have improved fixing and charging properties, preserving properties at a high temperature and high humidity, glossness and anti-offset properties by reducing a domain size of a wax dispersed in the toner and improving dispersibility of the wax.
    Type: Application
    Filed: June 27, 2008
    Publication date: June 18, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Kyeong Pang, Kyung-yol Yon, Hong-chul Shin
  • Publication number: 20090017394
    Abstract: Hollow toner and a process of preparing the same are provided. The hollow toner has a hollow sphere shape, wherein an outer layer surrounding the hollow sphere includes a polymer, a wax and a pigment. The hollow toner has excellent fixing properties under low energy and low pressure, and can be efficiently used at high-speed fixing. Also, a small amount of the hollow toner is consumed. Thus, the hollow toner can be efficiently applied to various apparatuses of forming an image such as a two-component low-temperature printer and super high-speed printer, and the hollow toner can be prepared by using a relatively simple process.
    Type: Application
    Filed: February 4, 2008
    Publication date: January 15, 2009
    Inventors: Kyeong Pang, Chang-shin Park, Kyung-yol Yon, Min-young Cheong, Hong-chul Shin