Patents by Inventor Yung-Fu Chen
Yung-Fu Chen 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: 11955397Abstract: A semiconductor structure is provided. The semiconductor structure includes a substrate, a channel layer, a barrier layer, a compound semiconductor layer, a gate electrode, and a stack of dielectric layers. The channel layer is disposed on the substrate. The barrier layer is disposed on the channel layer. The compound semiconductor layer is disposed on the barrier layer. The gate electrode is disposed on the compound semiconductor layer. The stack of dielectric layers is disposed on the gate electrode. The stack of dielectric layers includes layers having different etching rates.Type: GrantFiled: November 9, 2020Date of Patent: April 9, 2024Assignee: Vanguard International Semiconductor CorporationInventors: Shin-Cheng Lin, Cheng-Wei Chou, Ting-En Hsieh, Yi-Han Huang, Kwang-Ming Lin, Yung-Fong Lin, Cheng-Tao Chou, Chi-Fu Lee, Chia-Lin Chen, Shu-Wen Chang
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Publication number: 20240108409Abstract: A laser device for photocoagulation surgery is disclosed, wherein the laser device includes a multi-wavelength laser source having a first direction and a second direction different from the first direction. The laser device includes a positioning light source, a first laser light source, a first lens, a second laser light source, a second lens, a third laser light source, a third lens, a fourth laser light source and a fourth lens. The positioning light source configured to project a positioning visible light along the first direction, wherein the positioning visible light has a specific wavelength being about 635 nm. The first laser light source configured to project a first laser light having a first wavelength along the second direction. The first lens disposed in a main optical path of the positioning visible light, and configured to receive the first laser light and reflect the first laser light along the first direction.Type: ApplicationFiled: February 9, 2023Publication date: April 4, 2024Inventors: Yung-Fu Chen, Hsing-Chih Liang, Chia-Han Tsou
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Publication number: 20230036257Abstract: The invention discloses a Raman laser apparatus including a linear cavity having a first direction and a second direction opposite to the first direction, the linear cavity including along the first direction: a first optical component, a gain medium, a Raman medium, a lithium triborate (LBO) crystal and a second optical component. The first optical component receives an incident pumping light in the first direction. The gain medium receives the pumping light from the first optical component, and generates a first infrared base laser having a first wavelength. The Raman medium receives the first infrared base laser, and generates a second infrared base laser having a second wavelength. The LBO crystal receives the first and the second infrared base lasers, and generates a visible laser light having a third wavelength. The second optical component is configured to allow the visible laser light to be transmitted out along the first direction.Type: ApplicationFiled: October 19, 2021Publication date: February 2, 2023Applicant: National Yang Ming Chiao Tung UniversityInventors: Yung-Fu Chen, Hsing-Chih Liang, Chia-Han Tsou
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Patent number: 11522333Abstract: A high repetition rate pulse laser including a linear cavity having a first direction and a second direction opposite to the first direction is disclosed. The pulse laser includes, along the first direction, a first optical component, a gain and Raman medium, an acousto-optic crystal, a first lithium triborate (LBO) crystal and a second optical component. The first optical component allows a pumping light incident in the first direction to transmit therethrough. The gain and Raman medium receives the pumping light from the first optical component, and generates a first infrared base laser light having a first wavelength and a second infrared base laser light having a second wavelength. The acousto-optic crystal receives a radio frequency control signal from a radio frequency controller, wherein the radio frequency control signal has a signal period including a low level period and a high level period.Type: GrantFiled: March 15, 2021Date of Patent: December 6, 2022Assignee: National Yang Ming Chiao Tung UniversityInventors: Yung-Fu Chen, Hsing-Chih Liang, Chia-Han Tsou
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Publication number: 20220294178Abstract: The invention discloses a visible laser apparatus including a linear cavity. The linear cavity includes along the first direction: a first optical component, a gain medium, a second optical component, a Raman crystal, a double-harmonic crystal and a third optical component. The first optical component receives an incident pumping light in the first direction. The gain medium receives the pumping light from the first optical component, and generates a first infrared base laser having a first wavelength. The second optical component has a first high transmittance in a first wave band including the first wavelength in the first and the second directions. The Raman crystal receives the first infrared base laser, and generates a second infrared base laser having a second wavelength. The double-harmonic crystal receives the first and the second infrared base lasers, and generates a visible laser light having a third wavelength.Type: ApplicationFiled: September 2, 2021Publication date: September 15, 2022Applicant: National Yang Ming Chiao Tung UniversityInventors: Yung-Fu Chen, Hsing-Chih Liang, Chia-Han Tsou
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Patent number: 11316317Abstract: A multi-wavelength laser device equipped with a linear cavity along which a first direction and a second direction opposite to the first direction are defined is disclosed. The apparatus includes, along the first direction, a first optical component, a gain and Raman medium, a sum frequency generation crystal, a first second-harmonic generation crystal and a second optical component. The first optical component allows a pumping light to transmit therethrough and be incident in the first direction. The gain and Raman medium receives the pumping light from the first optical component and generates a first infrared base laser light having a first wavelength and a second infrared base laser light having a second wavelength. The first and second optical components form a laser cavity for oscillation of these two infrared base laser lights. The sum frequency generation crystal receives the first and second infrared base laser lights and generates a first visible laser light having a third wavelength.Type: GrantFiled: January 31, 2020Date of Patent: April 26, 2022Assignee: Lightmed CorporationInventors: Yung-Fu Chen, Hsing-Chih Liang, Chia-Han Tsou
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Publication number: 20220115831Abstract: A high repetition rate pulse laser including a linear cavity having a first direction and a second direction opposite to the first direction is disclosed. The pulse laser includes, along the first direction, a first optical component, a gain and Raman medium, an acousto-optic crystal, a first lithium triborate (LBO) crystal and a second optical component. The first optical component allows a pumping light incident in the first direction to transmit therethrough. The gain and Raman medium receives the pumping light from the first optical component, and generates a first infrared base laser light having a first wavelength and a second infrared base laser light having a second wavelength. The acousto-optic crystal receives a radio frequency control signal from a radio frequency controller, wherein the radio frequency control signal has a signal period including a low level period and a high level period.Type: ApplicationFiled: March 15, 2021Publication date: April 14, 2022Inventors: Yung-Fu Chen, Hsing-Chih Liang, Chia-Han Tsou
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Patent number: 11211771Abstract: A mode-locked solid state laser apparatus including an optical film, a gain medium crystal, a Fabry-Perot element, a first mirror, a second mirror, a third mirror and an output coupler is disclosed. The optical film is configured to receive a pumping light having a first wavelength incident in a first direction. The gain medium crystal receives the pumping light passing the optical film, and generates an initial laser beam having a second wavelength, wherein the initial laser beam forms a first optical path starting at one end thereof from the gain medium crystal. The Fabry-Perot element is disposed on the other end of the first optical path opposite to the one end, and reflects the initial laser beam along a second optical path having one end thereof starting from the Fabry-Perot element.Type: GrantFiled: October 30, 2019Date of Patent: December 28, 2021Assignee: HONG YANG LASER SERVICE CO., LTD.Inventors: Yung-Fu Chen, Hsing-Chih Liang, Tzu-Lin Huang, Shu-Ching Li, Chia-Han Tsou
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Patent number: 11126815Abstract: The disclosure provides a fingerprint sensor and a fingerprint sensing method thereof. The fingerprint sensor includes an optical sensing array, an analog front end circuit and an image processing circuit. The optical sensing array is configured for sequentially outputting a plurality of analog fingerprint images corresponding to a finger. The analog front end circuit is coupled to the optical sensing array. The analog front end circuit is configured for sequentially receiving and converting the plurality of analog fingerprint images into a plurality of first digital fingerprint images. The image processing circuit is coupled to the analog front end circuit. The image processing circuit is configured for sequentially superimposing the plurality of first digital fingerprint images to generate an enhanced fingerprint image.Type: GrantFiled: September 28, 2019Date of Patent: September 21, 2021Assignee: Egis Technology Inc.Inventors: Yung-Fu Chen, Chih-Hsien Weng, Chih-Ming Yuan
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Patent number: 11100891Abstract: An electronic device using an under-display fingerprint identification technology and a waking method of the electronic device are provided. The electronic device includes a display panel, a central processing unit and a fingerprint sensing module. The electronic device executes an operating system. When the central processing unit and the operating system are in a power-saving mode, the fingerprint sensing module enters a default operation mode and the display panel enters an always-on display mode. Then, the fingerprint sensing module senses a specified region of the display panel to acquire a first image. If the content of the first image contains an image of a finger, the fingerprint sensing module issues an interrupt signal to the central processing unit. Consequently, the central processing unit is woken up from the power-saving mode and the operating system is woken up.Type: GrantFiled: October 15, 2019Date of Patent: August 24, 2021Assignee: Egis Technology Inc.Inventors: Tong-Long Fu, Chen-Chih Fan, Chun-Ching Tseng, Wei-Jung Wang, Chun-Feng Kao, Yung-Fu Chen
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Publication number: 20200403374Abstract: A mode-locked solid state laser apparatus including an optical film, a gain medium crystal, a Fabry-Perot element, a first mirror, a second mirror, a third mirror and an output coupler is disclosed. The optical film is configured to receive a pumping light having a first wavelength incident in a first direction. The gain medium crystal receives the pumping light passing the optical film, and generates an initial laser beam having a second wavelength, wherein the initial laser beam forms a first optical path starting at one end thereof from the gain medium crystal. The Fabry-Perot element is disposed on the other end of the first optical path opposite to the one end, and reflects the initial laser beam along a second optical path having one end thereof starting from the Fabry-Perot element.Type: ApplicationFiled: October 30, 2019Publication date: December 24, 2020Applicant: Hong Yang Laser Service Co., Ltd.Inventors: Yung-Fu Chen, Hsing-Chih Liang, Tzu-Lin Huang, Shu-Ching Li, Chia-Han Tsou
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Publication number: 20200366047Abstract: A multi-wavelength laser device equipped with a linear cavity along which a first direction and a second direction opposite to the first direction are defined is disclosed. The apparatus includes, along the first direction, a first optical component, a gain and Raman medium, a sum frequency generation crystal, a first second-harmonic generation crystal and a second optical component. The first optical component allows a pumping light to transmit therethrough and be incident in the first direction. The gain and Raman medium receives the pumping light from the first optical component and generates a first infrared base laser light having a first wavelength and a second infrared base laser light having a second wavelength. The first and second optical components form a laser cavity for oscillation of these two infrared base laser lights. The sum frequency generation crystal receives the first and second infrared base laser lights and generates a first visible laser light having a third wavelength.Type: ApplicationFiled: January 31, 2020Publication date: November 19, 2020Applicant: Lightmed CorporationInventors: Yung-Fu Chen, Hsing-Chih Liang, Chia-Han Tsou
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Publication number: 20200193936Abstract: An electronic device using an under-display fingerprint identification technology and a waking method of the electronic device are provided. The electronic device includes a display panel, a central processing unit and a fingerprint sensing module. The electronic device executes an operating system. When the central processing unit and the operating system are in a power-saving mode, the fingerprint sensing module enters a default operation mode and the display panel enters an always-on display mode. Then, the fingerprint sensing module senses a specified region of the display panel to acquire a first image. If the content of the first image contains an image of a finger, the fingerprint sensing module issues an interrupt signal to the central processing unit. Consequently, the central processing unit is woken up from the power-saving mode and the operating system is woken up.Type: ApplicationFiled: October 15, 2019Publication date: June 18, 2020Inventors: TONG-LONG FU, CHEN-CHIH FAN, CHUN-CHING TSENG, WEI-JUNG WANG, CHUN-FENG KAO, YUNG-FU CHEN
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Publication number: 20200175240Abstract: The disclosure provides a fingerprint sensor and a fingerprint sensing method thereof. The fingerprint sensor includes an optical sensing array, an analog front end circuit and an image processing circuit. The optical sensing array is configured for sequentially outputting a plurality of analog fingerprint images corresponding to a finger. The analog front end circuit is coupled to the optical sensing array. The analog front end circuit is configured for sequentially receiving and converting the plurality of analog fingerprint images into a plurality of first digital fingerprint images. The image processing circuit is coupled to the analog front end circuit. The image processing circuit is configured for sequentially superimposing the plurality of first digital fingerprint images to generate an enhanced fingerprint image.Type: ApplicationFiled: September 28, 2019Publication date: June 4, 2020Applicant: Egis Technology Inc.Inventors: Yung-Fu Chen, Chih-Hsien Weng, Chih-Ming Yuan
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Patent number: 10630125Abstract: The present invention provides a rotor with magnet protection mechanism comprising a core, a plurality of magnets and a magnet protection mechanism. The core comprises a plurality of slots in a radial arrangement, and the magnets are held within the slots. The magnet protection mechanism is set against the core and comprises a plurality of segments corresponding to the slots in a circular configuration.Type: GrantFiled: November 8, 2017Date of Patent: April 21, 2020Assignee: HIWIN MIKROSYSTEM CORP.Inventors: Yung-Fu Chen, Cheng-Xun Pan
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Publication number: 20190140510Abstract: The present invention provides a rotor with magnet protection mechanism comprising a core, a plurality of magnets and a magnet protection mechanism. The core comprises a plurality of slots in a radial arrangement, and the magnets are held within the slots. The magnet protection mechanism is set against the core and comprises a plurality of segments corresponding to the slots in a circular configuration.Type: ApplicationFiled: November 8, 2017Publication date: May 9, 2019Inventors: Yung-Fu CHEN, Cheng-Xun PAN
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Patent number: 10257760Abstract: Methods and apparatus are provided for inter-RAT bearer change for the 3GPP network. In one novel aspect, a bearer termination procedure is performed upon detecting one or more triggering events for the inter-RAT bearer modification. In one embodiment, the UE established the 4G EPS bearer. The UE successfully performs a bearer change from 4G to 3G. Subsequently, the UE detects missing mandatory parameters during inter-RAT bearer change from 3G to 2G in an idle state. The UE performs bearer termination by releasing the PDP context. In one embodiment, the PDP context is locally released. In other embodiments, the UE explicitly releases bearer using the PDP context deactivation procedure. The locally released procedure can be triggered by the UE, or by the network, or by both the UE and the network. The explicitly PDP context release procedure can be triggered by the UE, or by the network, or by both the UE and the network.Type: GrantFiled: September 15, 2015Date of Patent: April 9, 2019Assignee: MEDIATEK INC.Inventors: Chien-Chun Huang-Fu, Shang-Ru Mo, Yuan-Chieh Lin, Yung Hsiang Hsieh, Yung-Fu Chen
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Patent number: 9888421Abstract: Methods and apparatus are provided for enhanced bearer continuity for the 3GPP network. In one novel aspect, the UE detects missing parameters for the inter-RAT bearer change in an idle state. The UE performs bearer preservation procedures to maintain the bearer continuity. In one embodiment, predefined/preconfigured parameter settings are used. In one embodiment, a mapping rule is used to map the missing parameter to a predefined value based on one or more known parameters. In another embodiment, the missing parameters are obtained from the network. In another embodiment, signaling procedures used to obtain the missing parameters. The signaling procedures include a service request, a UE-initiated bearer modification procedure. In one embodiment, the cell reselection is suspended such that the signaling procedure is performed to obtain the missing parameters before the cell reselection. In another embodiment, a RAU procedure is used upon detecting the missing of parameters.Type: GrantFiled: September 15, 2015Date of Patent: February 6, 2018Assignee: MEDIATEK INC.Inventors: Shang-Ru Mo, Chien-Chun Huang-Fu, Yuan-Chieh Lin, Yung Hsiang Hsieh, Yung-Fu Chen
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Publication number: 20160080978Abstract: Methods and apparatus are provided for enhanced bearer continuity for the 3GPP network. In one novel aspect, the UE detects missing parameters for the inter-RAT bearer change in an idle state. The UE performs bearer preservation procedures to maintain the bearer continuity. In one embodiment, predefined/preconfigured parameter settings are used. In one embodiment, a mapping rule is used to map the missing parameter to a predefined value based on one or more known parameters. In another embodiment, the missing parameters are obtained from the network. In another embodiment, signaling procedures used to obtain the missing parameters. The signaling procedures include a service request, a UE-initiated bearer modification procedure. In one embodiment, the cell reselection is suspended such that the signaling procedure is performed to obtain the missing parameters before the cell reselection. In another embodiment, a RAU procedure is used upon detecting the missing of parameters.Type: ApplicationFiled: September 15, 2015Publication date: March 17, 2016Inventors: Shang-Ru Mo, Chien-Chun Huang-Fu, Yuan-Chieh Lin, Yung Hsiang Hsieh, Yung-Fu Chen
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Publication number: 20160080992Abstract: Methods and apparatus are provided for inter-RAT bearer change for the 3GPP network. In one novel aspect, a bearer termination procedure is performed upon detecting one or more triggering events for the inter-RAT bearer modification. In one embodiment, the UE established the 4G EPS bearer. The UE successfully performs a bearer change from 4G to 3G. Subsequently, the UE detects missing mandatory parameters during inter-RAT bearer change from 3G to 2G in an idle state. The UE performs bearer termination by releasing the PDP context. In one embodiment, the PDP context is locally released. In other embodiments, the UE explicitly releases bearer using the PDP context deactivation procedure. The locally released procedure can be triggered by the UE, or by the network, or by both the UE and the network. The explicitly PDP context release procedure can be triggered by the UE, or by the network, or by both the UE and the network.Type: ApplicationFiled: September 15, 2015Publication date: March 17, 2016Inventors: Chien-Chun Huang-Fu, Shang-Ru Mo, Yuan-Chieh Lin, Yung Hsiang Hsieh, Yung-Fu Chen