Patents by Inventor Chang Hyeon Ji
Chang Hyeon Ji 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: 20230118492Abstract: Provided is a scanning micromirror including a reflective surface rotatable with respect to a rotation axis, a rim disposed on the outside of the reflective surface, a spring positioned on the rotation axis and connected to the reflective surface, and a connector connecting the reflective surface and the rim. The rim may include a first sub-rim disposed on one side and a second sub-rim disposed on the other side with respect to the spring.Type: ApplicationFiled: September 13, 2022Publication date: April 20, 2023Inventors: Chang Hyeon Ji, John Gu, Hwang-Sub Koo, Jong-Uk Bu
-
Publication number: 20220105360Abstract: An optical probe includes a light source configured to generate an optical signal, a plurality of waveguides configured to guide the optical signal to a target, a plurality of electrodes configured to record an electrical signal generated by the target, and a modulator configured to transmit the optical signal of the light source to at least one target waveguide from among the plurality of waveguides.Type: ApplicationFiled: October 6, 2021Publication date: April 7, 2022Inventors: Chang-Hyeon Ji, Sang Beom Jun
-
Publication number: 20220023584Abstract: Provided is an artificial intelligence-based noninvasive brain circuit control therapy system for sleep enhancement, the system including a wearable device including a first wearable member and a second wearable member formed to be wearable on a body of a user, a first sensor unit disposed on the first wearable member to detect an electroencephalogram (EEG), a second sensor unit disposed on the second wearable member to detect a biometric signal different from the EEG, and a stimulation means disposed on the first wearable member to stimulate the brain according to a stimulation signal provided thereto; a learning unit configured to machine-learn a criterion for determination of a sleep stage of the user based on a first sensing signal generated by the first sensor unit and a second sensing signal generated by the second sensor unit; and a determination unit configured to determine a current sleep stage of the user based on the criterion for determination, generate a stimulation signal corresponding to a deteType: ApplicationFiled: November 5, 2019Publication date: January 27, 2022Inventors: Hyang Woon LEE, Je Won KANG, Jung Rok LEE, Sang Beom JUN, Chang Hyeon JI
-
Patent number: 10551612Abstract: Disclosed is a scanning apparatus including a substrate, an outer gimbal connected to the substrate and including an outer coil, an inner gimbal connected to the outer gimbal and including an inner coil, a mirror connected to the inner gimbal and having a reflective face formed on one side, and a magnetic assembly disposed below the substrate, wherein a spring including a plurality of strings is provided between the inner gimbal and the mirror, the plurality of strings being symmetrical to one another with respect to a longitudinal axis of the spring.Type: GrantFiled: July 12, 2017Date of Patent: February 4, 2020Assignees: SenPlus Inc., Ewha University—Industry CollaborationInventors: Chang-Hyeon Ji, Jong Uk Bu
-
Publication number: 20180017783Abstract: Disclosed is scanning micromirror including a substrate, an outer gimbal connected to the substrate and including an outer coil, an inner gimbal connected to the outer gimbal and including an inner coil, a mirror connected to the inner gimbal and having a reflective face formed on one side, and a magnetic assembly disposed below the substrate, wherein a spring including a plurality of strings is provided between the inner gimbal and the mirror, the plurality of strings being symmetrical to one another with respect to a longitudinal axis of the spring.Type: ApplicationFiled: July 12, 2017Publication date: January 18, 2018Inventors: Chang-Hyeon JI, Jong Uk BU
-
Patent number: 9656854Abstract: Disclosed herein are a microelectromechanical systems (MEMS) microphone with a dual-back plate, and a method of manufacturing the same. The MEMS microphone according to an exemplary embodiment of the present invention includes: a substrate having a first back plate formed at a central portion thereof; a membrane plate disposed on first support parts formed at both sides on the substrate and vibrated depending on external sound pressure; and a second back plate disposed on second support parts formed at both sides of the membrane plate.Type: GrantFiled: November 29, 2012Date of Patent: May 23, 2017Assignee: KOREA INSTITUTE OF MACHINERY & MATERIALSInventors: Shin Hur, Young Do Jung, Young Hwa Lee, Jun Hyuk Kwak, Chang-Hyeon Ji
-
Patent number: 9528317Abstract: Disclosed therein is a sliding window having a cleaning unit. The sliding window includes: window panes having an inside window pane and an outside window pane; a window frame on which the window panes are mounted in a slidable manner; a vermin screen mounted at an outdoor side of the outside window pane; and a cleaning unit vertically mounted on a fixing side MC (Middle Closing) of the outside window pane or a screen side MC of the vermin screen in a longitudinal direction, wherein in the case that the cleaning unit is mounted at the fixing side MC of the outside window pane, the cleaning unit cleans the outside of the inside window pane while the inside window pane slides, and in the case that the cleaning unit is mounted at the screen side MC of the vermin screen, the cleaning unit cleans the outside of the outside window pane while the outside window pane slides.Type: GrantFiled: November 29, 2012Date of Patent: December 27, 2016Assignee: LG HAUSYS, Ltd.Inventors: Bo Ra Nam, Chang Hyeon Ji
-
Publication number: 20150129992Abstract: Disclosed herein are a microelectromechanical systems (MEMS) microphone with a dual-back plate, and a method of manufacturing the same. The MEMS microphone according to an exemplary embodiment of the present invention includes: a substrate having a first back plate formed at a central portion thereof; a membrane plate disposed on first support parts formed at both sides on the substrate and vibrated depending on external sound pressure; and a second back plate disposed on second support parts formed at both sides of the membrane plate.Type: ApplicationFiled: November 29, 2012Publication date: May 14, 2015Applicant: KOREA INSTITUTE OF MACHINERY MATERIALSInventors: Shin Hur, Young Do Jung, Young Hwa Lee, Jun Hyuk Kwak, Chang-Hyeon JI
-
Publication number: 20140318015Abstract: Disclosed therein is a sliding window having a cleaning unit. The sliding window includes: window panes having an inside window pane and an outside window pane; a window frame on which the window panes are mounted in a slidable manner; a vermin screen mounted at an outdoor side of the outside window pane; and a cleaning unit vertically mounted on a fixing side MC (Middle Closing) of the outside window pane or a screen side MC of the vermin screen in a longitudinal direction, wherein in the case that the cleaning unit is mounted at the fixing side MC of the outside window pane, the cleaning unit cleans the outside of the inside window pane while the inside window pane slides, and in the case that the cleaning unit is mounted at the screen side MC of the vermin screen, the cleaning unit cleans the outside of the outside window pane while the outside window pane slides.Type: ApplicationFiled: November 29, 2012Publication date: October 30, 2014Inventors: Bo Ra Nam, Chang Hyeon Ji
-
Publication number: 20100090566Abstract: Disclosed herein are a surface acoustic wave linear motor that can be driven in opposite directions along a predetermined path, a package including the surface acoustic wave linear motor, and a lens actuator that is capable of performing an optical zoom function by adopting the surface acoustic wave linear motor package. The surface acoustic wave linear motor includes a substrate, through which a surface acoustic wave progresses, a movable part constructed such that the movable part can perform a translating movement in the opposite direction to the progressing direction of the surface acoustic wave, and electrodes for supplying the substrate with power to generate the surface acoustic wave in the substrate. According to the present invention, the surface acoustic wave linear motor is capable of performing a translating movement without the provision of an additional mechanism, unlike the conventional actuator using the rotary motor, the gear, and the lead screw.Type: ApplicationFiled: October 22, 2009Publication date: April 15, 2010Inventors: Chang-Hyeon Ji, Jong-Uk Bu
-
Patent number: 7626312Abstract: Disclosed herein are a surface acoustic wave linear motor that can be driven in opposite directions along a predetermined path, a package including the surface acoustic wave linear motor, and a lens actuator that is capable of performing an optical zoom function by adopting the surface acoustic wave linear motor package. The surface acoustic wave linear motor includes a substrate, through which a surface acoustic wave progresses, a movable part constructed such that the movable part can perform a translating movement in the opposite direction to the progressing direction of the surface acoustic wave, and electrodes for supplying the substrate with power to generate the surface acoustic wave in the substrate. According to the present invention, the surface acoustic wave linear motor is capable of performing a translating movement without the provision of an additional mechanism, unlike the conventional actuator using the rotary motor, the gear, and the lead screw.Type: GrantFiled: January 26, 2006Date of Patent: December 1, 2009Assignee: LG Electronics Inc.Inventors: Chang-Hyeon Ji, Jong-Uk Bu
-
Patent number: 7567396Abstract: The present invention relates to a variably focusing mirror for realizing an automatic focusing and optical zooming of a miniature camera module, the mirror comprising a driving part having a supporting board and more than one permanent magnet attached on the supporting board; and a mirror having a coil, a reflective surface of which a curvature is changed by the magnitude and the direction of a current flowing through the coil and a thin film on which the reflective surface is incorporated. The variably focusing mirror according to the present invention can realize a focusing and an optical zooming by adjusting a curvature radius of a reflective surface. Therefore, it can remarkably decrease the volume of a camera module and be used in various applications requiring for a miniature camera module.Type: GrantFiled: April 7, 2006Date of Patent: July 28, 2009Assignee: LG Electronics Inc.Inventor: Chang-Hyeon Ji
-
Patent number: 7453617Abstract: A scanning device includes a mirror unit formed on a substrate so as to be pivotable centering around one axis for adjusting the direction of reflected light; a support frame formed at one surface of the mirror unit for preventing dynamic deflection of the mirror unit and supporting the mirror unit; and a driving unit provided on the substrate and driving the mirror unit. Thus, a dynamic deflection phenomenon does not occur when the mirror unit is pivoted centering around the pivoting axis. Accordingly, stable operation is possible and the angle of rotation of the mirror unit can be accurately adjusted, so that the scanning device can be effectively used in a high-speed precision scanning system.Type: GrantFiled: August 16, 2005Date of Patent: November 18, 2008Assignee: LG Electronics Inc.Inventors: Young-Joo Yee, Chang-Hyeon Ji, Seong-Hyok Kim
-
Patent number: 7433107Abstract: Disclosed herein is a raster scanning display system. The raster scanning display system includes a micro mirror and a galvanic mirror. The micro mirror rotates in two horizontal directions and forms a horizontal beam by reflecting input light. The galvanic mirror rotates in two vertical directions and forms a two-dimensional scan region by reflecting the horizontal beam.Type: GrantFiled: August 18, 2005Date of Patent: October 7, 2008Assignee: LG Electronics Inc.Inventors: Chang-Hyeon Ji, Young-Joo Yee, See-Hyung Lee
-
Publication number: 20080225419Abstract: A varifocal mirror and a camera module comprising the same are disclosed. The varifocal mirror comprises a substrate, a thin film having a circumference supported by the substrate and a variable radius of curvature, and a reflective plane attached to the thin film to reflect light. The reflective plane has a radius of curvature varying in response to variation in the radius of curvature of the thin film. The camera module embodies focus and optical zoom functions via actuation of the varifocal mirror instead of using an electromagnetic actuator, a step motor and the like when adjusting positions of lens units, significantly reducing a volume of the overall system. With this structure, the camera module can be applied to various portable digital assistances requiring a minimized camera module, such as PDAs, mobile phones and the like.Type: ApplicationFiled: September 24, 2007Publication date: September 18, 2008Inventors: Sang-Cheon Kim, Chang-Hyeon Ji, Jong-Uk Bu, Hee-Jong Moon
-
Patent number: 7412157Abstract: A lens driving device includes a substrate which generates surface acoustic waves on its surface and a movable unit which is coupled to an optical lens and executes translation above the substrate using the surface acoustic waves. The lens driving device can implement translation of the lens without a separate mechanism, unlike the conventional driving devices using motors and screws, thereby satisfying the recent trend towards miniaturization and lightness to be used in a variety of industrial fields that use optical lenses.Type: GrantFiled: September 23, 2005Date of Patent: August 12, 2008Assignee: LG Electronics Inc.Inventors: Jae-Hyoung Park, Chang-Hyeon Ji, Man-Hyo Ha, Seoung-Hyok Kim, Jong-Uk Bu, Young-Joo Yee
-
Patent number: D664267Type: GrantFiled: August 2, 2011Date of Patent: July 24, 2012Assignee: LG Hausys, LtdInventors: Jeong-Hyeon Kim, Hag-Gyu Park, Ju-Han Lee, Chang-Hyeon Ji
-
Patent number: D664678Type: GrantFiled: August 2, 2011Date of Patent: July 31, 2012Assignee: LG Hausys, Ltd.Inventors: Jeong-Hyeon Kim, Hag-Gyu Park, Ju-Han Lee, Chang-Hyeon Ji
-
Patent number: D664679Type: GrantFiled: August 2, 2011Date of Patent: July 31, 2012Assignee: LG Hausys, Ltd.Inventors: Jeong-Hyeon Kim, Hag-Gyu Park, Ju-Han Lee, Chang-Hyeon Ji
-
Patent number: D664680Type: GrantFiled: August 2, 2011Date of Patent: July 31, 2012Assignee: LG Hausys, Ltd.Inventors: Jeong-Hyeon Kim, Hag-Gyu Park, Ju-Han Lee, Chang-Hyeon Ji