Patents by Inventor Chien-Nan Yeh
Chien-Nan Yeh 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: 10914368Abstract: A ball screw with force sensor in radial direction including a screw rod, a screw nut, a plurality of balls, and a force sensor is provided. The screw nut has a cavity. The cavity is extended along a radial direction from an outer surface of the screw nut. The force sensor is disposed in the cavity of the screw nut, and the force sensor includes a stationary base and an elastic component. The stationary base includes a displacement restraint, and the elastic component includes a contact end and a fixed end. The displacement restraint is coupled to the cavity to prevent the stationary base from being displaced in the radial direction for fixing stationary base firmly in the cavity. The fixed end is connected to the stationary base, and the contact end contacts a bottom surface of the cavity in order to sense a force along the radial direction.Type: GrantFiled: December 17, 2018Date of Patent: February 9, 2021Assignee: Industrial Technology Research InstituteInventors: Chih-Yuan Chen, Chung-Yuan Su, Chien-Nan Yeh, Chao-Ta Huang, Yu-Wen Hsu
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Publication number: 20210018041Abstract: A linear guideway with an embedded sensor includes a track, a slider, a plurality of rolling members, and a sensing module. The track extends in a first direction and has a first recess. The slider can move in the first direction and include a second recess, a channel, at least one hole, and a deforming region. The channel is formed by coupling the first recess and the second recess, and extends in the first direction. The hole extends from the surface of the slider along the insertion axis and into the slider. The rolling members are disposed in the channel. The sensing module is disposed in the hole, and contacts the deforming region to detect the amount of deformation.Type: ApplicationFiled: May 8, 2020Publication date: January 21, 2021Inventors: Chien-Nan YEH, Chung-Yuan SU, Chao-Ta HUANG
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Publication number: 20200287104Abstract: A package includes a substrate and a plurality of light-emitting chips. The substrate has a top surface. The light-emitting chips are disposed on the top surface of the substrate, in which a sum of the vertical projection areas of the light-emitting chips on the top surface of the substrate is less than 5% of an area of the top surface of the substrate.Type: ApplicationFiled: March 4, 2020Publication date: September 10, 2020Inventors: Shiou-Yi KUO, Jian-Chin LIANG, Yu-Chun LEE, Fu-Hsin CHEN, Jo-Hsiang CHEN, Chien-Nan YEH
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Patent number: 10703625Abstract: A MEMS apparatus with adjustable spring includes a central portion, a peripheral portion and at least one spring. The peripheral portion surrounds the central portion and is spaced apart from the central portion. The spring includes a peripheral section, an outward extension section and a central section. The peripheral section is connected to the outward extension section. An amount of thermal expansion per unit temperature change of the outward extension section is greater than that of the peripheral section or greater than that of the central section.Type: GrantFiled: March 29, 2019Date of Patent: July 7, 2020Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chien-Nan Yeh, Yu-Wen Hsu, Chao-Ta Huang
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Publication number: 20200025281Abstract: A ball screw with force sensor in radial direction including a screw rod, a screw nut, a plurality of balls, and a force sensor is provided. The screw nut has a cavity. The cavity is extended along a radial direction from an outer surface of the screw nut. The force sensor is disposed in the cavity of the screw nut, and the force sensor includes a stationary base and an elastic component. The stationary base includes a displacement restraint, and the elastic component includes a contact end and a fixed end. The displacement restraint is coupled to the cavity to prevent the stationary base from being displaced in the radial direction for fixing stationary base firmly in the cavity. The fixed end is connected to the stationary base, and the contact end contacts a bottom surface of the cavity in order to sense a force along the radial direction.Type: ApplicationFiled: December 17, 2018Publication date: January 23, 2020Applicant: Industrial Technology Research InstituteInventors: Chih-Yuan Chen, Chung-Yuan Su, Chien-Nan Yeh, Chao-Ta Huang, Yu-Wen Hsu
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Publication number: 20190196520Abstract: An apparatus with two anchors including a housing, a movable element, and a rotary element is provided. The housing includes a first expansion unit, a second expansion unit, and a linkage. First alignment structures are disposed in the movable element and anti-rotation structures are disposed in the linkage. When the movable element and the rotary element enter the housing from two ends and are coupled along an axis, the movable element and the rotary element can approach each other to expand the first expansion unit and the second expansion unit to fonn two anchors. The apparatus :with two anchors secures a sensor in a variety of environments such as walls or machines. When the apparatus with two anchors fixes a sensor in a hole of a stamping machine, the impact force does not cause stress concentration on the sensor so as to improve the reliability of the sensor.Type: ApplicationFiled: December 25, 2017Publication date: June 27, 2019Applicant: Industrial Technology Research InstituteInventors: Chien-Nan Yeh, Chung-Yuan Su, Chih-Yuan Chen, Chao-Ta Huang, Yu-Wen Hsu
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Patent number: 10172205Abstract: A dimming module includes a triggering circuit, a control signal generating circuit, a voltage converting circuit, and a linear driving circuit. The triggering circuit is configured to control a trigger delay angle of an AC input voltage according to a dimming command, in order to output a first voltage signal correspondingly. The control signal generating circuit is configured to output a control voltage according to the first voltage signal. The voltage converting circuit is configured to output a DC operating voltage having an operating level according to the first voltage signal, and output the DC operating voltage to a lighting module, in which the lighting module includes a light-emitting diode. The linear driving circuit is configured to drive the lighting module according to the control voltage.Type: GrantFiled: May 9, 2017Date of Patent: January 1, 2019Assignee: LEXTAR ELECTRONICS CORPORATIONInventors: Jhao-Cyuan Huang, Chien-Nan Yeh, Chun-Jong Chang, Ching-Piao Chen, Po-Shen Chen
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Patent number: 9967938Abstract: A solid state light source device and a dimming circuit are provided. The dimming circuit includes a rectifier circuit, a switch unit, and a control unit. The rectifier circuit is configured to convert an AC voltage signal to a rectified voltage signal. The switch unit is electrically connected between the rectifier circuit and a lighting module and configured to undergo switching according to a pulse width modulation signal to connect or disconnect the rectifier circuit and the lighting module. The control unit is electrically connected to the switch unit and configured to generate the pulse width modulation signal to control the switch unit.Type: GrantFiled: June 16, 2015Date of Patent: May 8, 2018Assignee: Lextar Electronics CorporationInventors: Po-Shen Chen, Chun-Jong Chang, Chien-Nan Yeh
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Patent number: 9867241Abstract: A dimming module and a solid state lighting device are shown. The dimming module includes a rectifying circuit, a first driving circuit, and a processing circuit. The rectifying circuit is configured to convert an AC voltage to a rectified voltage. The first driving circuit is configured to receive the rectified voltage to provide a first current so as to drive a first lighting module. The first driving circuit includes a first switch. The first switch turns ON or OFF selectively according to a first control voltage signal so as to control the first current. The processing circuit is configured to receive a dimming command, and adjust the first control voltage signal according to the dimming command. The first control voltage signal is configured to control a phase delay angle and a duty cycle of the first current.Type: GrantFiled: November 27, 2016Date of Patent: January 9, 2018Assignee: Lextar Electronics CorporationInventors: Chien-Nan Yeh, Chun-Jong Chang, Po-Shen Chen, Kai-Hsiang Shih, Jhao-Cyuan Huang, Ku-Cheng Lin
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Patent number: 9867248Abstract: A dimming module and a solid state lighting device are shown. The dimming module includes a rectifying circuit, a phase control circuit, a processing circuit and a first driving circuit. The rectifying circuit is configured to convert an input AC voltage to a rectified voltage signal. The phase control circuit is configured to receive the rectified voltage signal and a dimming command, and output a control voltage signal correspondingly in which the phase control circuit controls a phase delay angle of the control voltage signal according to the dimming command. The processing circuit is configured to receive the control voltage signal and adjust a first driving voltage signal according to the phase delay angle. The first driving circuit is configured to receive the first driving voltage signal to drive a first lighting module.Type: GrantFiled: November 25, 2016Date of Patent: January 9, 2018Assignee: LEXTAR ELECTRONICS CORPORATIONInventors: Chien-Nan Yeh, Chun-Jong Chang, Po-Shen Chen, Kai-Hsiang Shih, Jhao-Cyuan Huang, Ku-Cheng Lin
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Publication number: 20170339763Abstract: A dimming module includes a triggering circuit, a control signal generating circuit, a voltage converting circuit, and a linear driving circuit. The triggering circuit is configured to control a trigger delay angle of an AC input voltage according to a dimming command, in order to output a first voltage signal correspondingly. The control signal generating circuit is configured to output a control voltage according to the first voltage signal. The voltage converting circuit is configured to output a DC operating voltage having an operating level according to the first voltage signal, and output the DC operating voltage to a lighting module, in which the lighting module includes a light-emitting diode. The linear driving circuit is configured to drive the lighting module according to the control voltage.Type: ApplicationFiled: May 9, 2017Publication date: November 23, 2017Inventors: Jhao-Cyuan HUANG, Chien-Nan YEH, Chun-Jong CHANG, Ching-Piao CHEN, Po-Shen CHEN
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Publication number: 20170223793Abstract: A dimming module and a solid state lighting device are shown. The dimming module includes a rectifying circuit, a first driving circuit, and a processing circuit. The rectifying circuit is configured to convert an AC voltage to a rectified voltage. The first driving circuit is configured to receive the rectified voltage to provide a first current so as to drive a first lighting module. The first driving circuit includes a first switch. The first switch turns ON or OFF selectively according to a first control voltage signal so as to control the first current. The processing circuit is configured to receive a dimming command, and adjust the first control voltage signal according to the dimming command. The first control voltage signal is configured to control a phase delay angle and a duty cycle of the first current.Type: ApplicationFiled: November 27, 2016Publication date: August 3, 2017Inventors: Chien-Nan YEH, Chun-Jong CHANG, Po-Shen CHEN, Kai-Hsiang SHIH, Jhao-Cyuan HUANG, Ku-Cheng LIN
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Publication number: 20170215244Abstract: A dimming module and a solid state lighting device are shown. The dimming module includes a rectifying circuit, a phase control circuit, a processing circuit and a first driving circuit. The rectifying circuit is configured to convert an input AC voltage to a rectified voltage signal. The phase control circuit is configured to receive the rectified voltage signal and a dimming command, and output a control voltage signal correspondingly in which the phase control circuit controls a phase delay angle of the control voltage signal according to the dimming command. The processing circuit is configured to receive the control voltage signal and adjust a first driving voltage signal according to the phase delay angle. The first driving circuit is configured to receive the first driving voltage signal to drive a first lighting module.Type: ApplicationFiled: November 25, 2016Publication date: July 27, 2017Inventors: Chien-Nan YEH, Chun-Jong CHANG, Po-Shen CHEN, Kai-Hsiang SHIH, Jhao-Cyuan HUANG, Ku-Cheng LIN
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Publication number: 20170215245Abstract: A light-emitting device includes a dimmer, a rectifier, a first light-emitting module, a first controller, a second light-emitting module and a second controller. The dimmer is coupled to an alternating current for modulating the alternating current into an alternating signal. The rectifier couples the dimmer to the alternating current for rectifying the alternating signal into a direct current signal. The first light-emitting module is for emitting a first light with a first color temperature. The first controller is coupled to the first light-emitting module for controlling the first light-emitting module to emit the first light. The second light-emitting module is for emitting a second light with a second color temperature different from the first color temperature. The second controller coupled to the second light-emitting module for controlling the second light-emitting module to emit the second light.Type: ApplicationFiled: November 28, 2016Publication date: July 27, 2017Inventors: Chien-Nan Yeh, Chun-Jong Chang, Po-Shen Chen, Jhao-Cyuan Huang
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Patent number: 9717127Abstract: A dimming system includes a signal generating circuit, a first dimming circuit and a second dimming circuit. The signal generating circuit generates the driving signal according to the input signal, and switches the driving signal between multiple states according to the switch signal. The first dimming circuit generates the dimming signal to adjust the luminance of the LED device according to the driving signal. When the driving signal is switched from the first states to the second states, the dimming signal is changed by the first dimming circuit so that the luminance of the LED device is adjusted from the first luminance to the second luminance. The second dimming circuit adjusts the input signal according to the control signal so that the dimming signal is adjusted and the luminance of the LED device is between the first luminance and minimum luminance, or between the second luminance and minimum luminance.Type: GrantFiled: November 1, 2016Date of Patent: July 25, 2017Assignee: LEXTAR ELECTRONICS CORPORATIONInventors: Chien-Nan Yeh, Chun-Jong Chang, Po-Shen Chen, Jhao-Cyuan Huang, Tzu-Hao Liu
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Publication number: 20170202066Abstract: A dimming system includes a signal generating circuit, a first dimming circuit and a second dimming circuit. The signal generating circuit generates the driving signal according to the input signal, and switches the driving signal between multiple states according to the switch signal. The first dimming circuit generates the dimming signal to adjust the luminance of the LED device according to the driving signal. When the driving signal is switched from the first states to the second states, the dimming signal is changed by the first dimming circuit so that the luminance of the LED device is adjusted from the first luminance to the second luminance. The second dimming circuit adjusts the input signal according to the control signal so that the dimming signal is adjusted and the luminance of the LED device is between the first luminance and minimum luminance, or between the second luminance and minimum luminance.Type: ApplicationFiled: November 1, 2016Publication date: July 13, 2017Inventors: Chien-Nan Yeh, Chun-Jong Chang, Po-Shen Chen, Jhao-Cyuan Huang, Tzu-Hao Liu
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Patent number: 9538595Abstract: An illumination device includes a rectifier circuit, M light-emitting modules, and a control module. The rectifier circuit has a positive output terminal and a negative output terminal, and generates a driving voltage between the positive output terminal and the negative output terminal according to an input power. The M light-emitting modules are coupled between the positive output terminal and the negative output terminal. Each of the M light-emitting modules has a conduction voltage, and includes a light-emitting unit that includes at least one light-emitting diode. The control module is coupled between the rectifier circuit and the M light-emitting modules, and controls the M light-emitting modules to dynamically form S light-emitting diode strings coupled in parallel with each other. A number of the light-emitting units in each of the S light-emitting diode strings is N, in which S×N=M, where M, S, N are positive integers.Type: GrantFiled: November 29, 2015Date of Patent: January 3, 2017Assignee: LEXTAR ELECTRONICS CORPORATIONInventors: Chun-Jong Chang, Jhao-Cyuan Huang, Po-Shen Chen, Chien-Nan Yeh
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Patent number: 9538594Abstract: A lamp includes a lamp tube, a carrier, a light bar circuit board, a driver circuit board, a plurality of first luminous elements and a parallel-connected type luminous unit. The carrier is accommodated in the lamp tube. The light bar circuit board is disposed on the carrier. The driver circuit board is disposed on the carrier and adjoins the light bar circuit board. The first luminous elements are disposed on the light bar circuit board. The parallel-connected type luminous unit is disposed on the driver circuit board, and includes a plurality of luminous element groups connected in parallel.Type: GrantFiled: May 24, 2013Date of Patent: January 3, 2017Assignee: LEXTAR ELECTRONICS CORPORATIONInventors: Chun-Kuang Chen, Chien-Nan Yeh
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Patent number: 9474115Abstract: A dimming circuit is disclosed herein. The dimming circuit includes a control voltage receiving module and a driving module. The control voltage receiving module is configured to output a reference voltage according to a control voltage. The driving module is electrically connected to the control voltage receiving module, in which the driving module includes a driving transistor, a first transistor and a feedback circuit. The driving transistor is configured to provide a driving current to drive a lighting module. The first transistor is configured to control the driving transistor with feedback according to the reference voltage. The feedback circuit is electrically connected between the driving transistor and the first transistor and configured to determine the operating state of the first transistor according to the driving current.Type: GrantFiled: March 6, 2016Date of Patent: October 18, 2016Assignee: LEXTAR ELECTRONICS CORPORATIONInventors: Chun-Jong Chang, Po-Shen Chen, Jhao-Cyuan Huang, Chien-Nan Yeh
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Publication number: 20160278173Abstract: A dimming circuit is disclosed herein. The dimming circuit includes a control voltage receiving module and a driving module. The control voltage receiving module is configured to output a reference voltage according to a control voltage. The driving module is electrically connected to the control voltage receiving module, in which the driving module includes a driving transistor, a first transistor and a feedback circuit. The driving transistor is configured to provide a driving current to drive a lighting module. The first transistor is configured to control the driving transistor with feedback according to the reference voltage. The feedback circuit is electrically connected between the driving transistor and the first transistor and configured to determine the operating state of the first transistor according to the driving current.Type: ApplicationFiled: March 6, 2016Publication date: September 22, 2016Inventors: Chun-Jong CHANG, Po-Shen CHEN, Jhao-Cyuan HUANG, Chien-Nan YEH