Patents by Inventor Yu-Huan Liu

Yu-Huan Liu 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).

  • Patent number: 10907095
    Abstract: The present invention relates to novel phosphor mixtures and to a light-emitting device which comprises at least one of the novel phosphor mixtures. The phosphor mixtures can be used in phosphor-converted LEDs with a semiconductor that emits in the violet spectral region. The present invention furthermore relates to a lighting system which may comprise the light-emitting devices according to the invention, and to a dynamic lighting system. The present invention furthermore relates to a process for the preparation of the phosphor mixtures according to the invention and to the use thereof in light-emitting devices for use in general lighting and/or in specialty lighting.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: February 2, 2021
    Assignee: LITEC-VERMOGENSVERWALTUNGSGESELLSCHAFT MBH
    Inventors: Andreas Benker, Ralf Petry, Ingo Koehler, Irene (Yu Huan) Liu, Christof Hampel, Aleksander Zych
  • Publication number: 20200010759
    Abstract: The present invention relates to novel phosphor mixtures and to a light-emitting device which comprises at least one of the novel phosphor mixtures. The phosphor mixtures can be used in phosphor-converted LEDs with a semiconductor that emits in the violet spectral region. The present invention furthermore relates to a lighting system which may comprise the light-emitting devices according to the invention, and to a dynamic lighting system. The present invention furthermore relates to a process for the preparation of the phosphor mixtures according to the invention and to the use thereof in light-emitting devices for use in general lighting and/or in specialty lighting.
    Type: Application
    Filed: March 5, 2018
    Publication date: January 9, 2020
    Applicant: MERCK PATENT GMBH
    Inventors: Andreas BENKER, Ralf PETRY, Ingo KOEHLER, Irene (Yu Huan) LIU, Christof HAMPEL, Aleksander ZYCH
  • Patent number: 9279081
    Abstract: A phosphor composition and a white light emitting device using the same are disclosed. The white light emitting device includes a blue light emitting diode and a phosphor composition disposed on the blue light emitting diode, wherein the phosphor composition includes a yellow lanthanum silicon nitride, a yellow ?-SiAlON and a red CaAlSiN, and the weight proportion of the yellow lanthanum silicon nitride, the yellow ?-SiAlON and the red CaAlSiN is 1: 1:0.3˜0.45.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: March 8, 2016
    Assignee: Everlight Electronics Co., Ltd.
    Inventors: Yao-Yu Yang, Yu-Huan Liu
  • Patent number: 8604510
    Abstract: A light-emitting diode (LED) and manufacturing method thereof are disclosed. The LED includes a transparent substrate, a plurality of transparent conductive layers, a plurality of metal circuits, and a LED chip. The LED chip is suitable for emitting a light and a portion of the light emits toward the transparent substrate. The manufacturing method of LED includes the following steps. First, a transparent conductive layer is formed on the transparent substrate. Next, a conductive pattern is formed by etching transparent conductive layer. The intersection metal circuit is formed by disposing the metal on a portion of the transparent conductive layer. Finally, the LED chip is disposed on the metal circuit so that the LED chip is electrically connected to the metal circuit.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: December 10, 2013
    Assignee: Everlight Electronics Co., Ltd.
    Inventors: Ssu-Yuan Weng, Yu-Huan Liu
  • Patent number: 8431948
    Abstract: A light emitting diode package and a fabrication method thereof are provided. The light emitting diode package comprises a lead frame, having a frame body and a conductive layer covering the frame body. A reflector has a first portion and a second portion sandwiching the lead frame, wherein the first portion has a depression to expose the lead frame, and a light emitting diode chip is disposed on the lead frame in the depression. The fabrication method comprises forming a frame body and forming a conductive layer covering the frame body to form a lead frame. A first portion and a second portion of a reflector are formed to sandwich the lead frame, wherein the first portion has a depression to expose the lead frame. A light emitting diode chip is disposed on the lead frame in the depression.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: April 30, 2013
    Assignee: Everlight Electronics Co., Ltd.
    Inventor: Yu-Huan Liu
  • Patent number: 8389307
    Abstract: A light emitting diode package and a fabrication method thereof are provided. The light emitting diode package comprises a lead frame, having a frame body and a conductive layer covering the frame body. A reflector has a first portion and a second portion sandwiching the lead frame, wherein the first portion has a depression to expose the lead frame, and a light emitting diode chip is disposed on the lead frame in the depression. The fabrication method comprises forming a frame body and forming a conductive layer covering the frame body to form a lead frame. A first portion and a second portion of a reflector are formed to sandwich the lead frame, wherein the first portion has a depression to expose the lead frame. A light emitting diode chip is disposed on the lead frame in the depression.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: March 5, 2013
    Assignee: Everlight Electronics Co., Ltd.
    Inventor: Yu-Huan Liu
  • Publication number: 20130045603
    Abstract: A semiconductor process is described as follows. A material layer is provided on a substrate. A low-temperature oxidation treatment is performed to the material layer. A photoresist layer is formed on the material layer after the low-temperature oxidation treatment. The photoresist layer is patterned.
    Type: Application
    Filed: August 19, 2011
    Publication date: February 21, 2013
    Applicant: UNITED MICROELECTRONICS CORP.
    Inventors: Chao-Yu Tsai, Chih-Chung Huang, Tsz-Yuan Chen, Kung-Hsun Tsao, Huan-Hsin Yeh, Yu-Huan Liu
  • Publication number: 20130032850
    Abstract: A light-emitting diode (LED) and manufacturing method thereof are disclosed. The LED includes a transparent substrate, a plurality of transparent conductive layers, a plurality of metal circuits, and a LED chip. The LED chip is suitable for emitting a light and a portion of the light emits toward the transparent substrate. The manufacturing method of LED includes the following steps. First, a transparent conductive layer is formed on the transparent substrate. Next, a conductive pattern is formed by etching transparent conductive layer. The intersection metal circuit is formed by disposing the metal on a portion of the transparent conductive layer. Finally, the LED chip is disposed on the metal circuit so that the LED chip is electrically connected to the metal circuit.
    Type: Application
    Filed: October 11, 2012
    Publication date: February 7, 2013
    Applicant: EVERLIGHT ELECTRONICS CO., LTD.
    Inventors: Ssu-Yuan Weng, Yu-Huan Liu
  • Publication number: 20120168804
    Abstract: A light emitting diode package and a fabrication method thereof are provided. The light emitting diode package comprises a lead frame, having a frame body and a conductive layer covering the frame body. A reflector has a first portion and a second portion sandwiching the lead frame, wherein the first portion has a depression to expose the lead frame, and a light emitting diode chip is disposed on the lead frame in the depression. The fabrication method comprises forming a frame body and forming a conductive layer covering the frame body to form a lead frame. A first portion and a second portion of a reflector are formed to sandwich the lead frame, wherein the first portion has a depression to expose the lead frame. A light emitting diode chip is disposed on the lead frame in the depression.
    Type: Application
    Filed: March 7, 2012
    Publication date: July 5, 2012
    Applicant: EVERLIGHT ELECTRONICS CO., LTD.
    Inventor: Yu-Huan Liu
  • Patent number: 8154033
    Abstract: A light emitting diode (LED) device including a transparent substrate, a plurality of LED chips, a circuit, and a transparent encapsulant is provided. The LED chips are fixed on the transparent substrate, and utilized for radiating at least a light beam. The circuit is disposed on the transparent substrate and electrically connected to the LED chips. The transparent encapsulant is utilized for packaging the LED chips. The light beam of the LED chips can propagate from two opposite sides of the transparent substrate. Blue LED chips and the circuit of the transparent substrate can be directly soldered, and the phosphors are arranged to convert the wavelength of blue light, so a dual-side white light emitting device can therefore be provided.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: April 10, 2012
    Assignee: Everlight Electronics Co., Ltd.
    Inventor: Yu-Huan Liu
  • Patent number: 7965028
    Abstract: A white-light emitting device comprises a substrate, a short wavelength light source, a protective layer, a first structure, and a second structure. The short wavelength light source is disposed on the substrate for generating a first light, and the protective layer covering the short wavelength light source is pervious to the first light. The first structure is disposed on the protective layer for generating a second light, in which the first structure includes a first quantum well and a transmission layer. The second structure is disposed on the first structure for generating a third light. Finally, the first light, the second light, and the third light are mixed to generate a white light.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: June 21, 2011
    Assignee: Au Optronics Corporation
    Inventors: Yu-Huan Liu, Chieh-Hsiu Lin, Chih-Lin Wang, Yun-Yi Tien
  • Publication number: 20110121349
    Abstract: A light-emitting diode (LED) and manufacturing method thereof are disclosed. The LED includes a transparent substrate, a plurality of transparent conductive layers, a plurality of metal circuits, and a LED chip. The LED chip is suitable for emitting a light and a portion of the light emits toward the transparent substrate. The manufacturing method of LED includes the following steps. First, a transparent conductive layer is formed on the transparent substrate. Next, a conductive pattern is fromed by etching transparent conductive layer. The intersection metal circuit is formed by disposing the metal on a portion of the transparent conductive layer. Finally, the LED chip is disposed on the metal circuit so tat the LED chip is electrically connected to the metal circuit.
    Type: Application
    Filed: May 17, 2010
    Publication date: May 26, 2011
    Applicant: EVERLIGHT ELECTRONICS CO., LTD.
    Inventors: Szu-Yuan Weng, Yu-Huan Liu
  • Publication number: 20100264429
    Abstract: A light emitting device and an electronic device using the same are provided. The light emitting device includes a light emitting chip having a wavelength between 460 nm and 650 nm and phosphor powders, in which the phosphor powders can be stimulated by light emitted from the chip to emit light with a wavelength between 700 nm and 1200 nm. The phosphor powders are selected from the group consisting of Cu-doped CdS, Cu-doped SeS, Cu-doped CdTe and combinations thereof.
    Type: Application
    Filed: October 26, 2009
    Publication date: October 21, 2010
    Applicant: EVER LIGHT ELECTRONICS CO., LTD.
    Inventor: Yu-Huan Liu
  • Publication number: 20100193816
    Abstract: A light emitting diode package and a fabrication method thereof are provided. The light emitting diode package comprises a lead frame, having a frame body and a conductive layer covering the frame body. A reflector has a first portion and a second portion sandwiching the lead frame, wherein the first portion has a depression to expose the lead frame, and a light emitting diode chip is disposed on the lead frame in the depression. The fabrication method comprises forming a frame body and forming a conductive layer covering the frame body to form a lead frame. A first portion and a second portion of a reflector are formed to sandwich the lead frame, wherein the first portion has a depression to expose the lead frame. A light emitting diode chip is disposed on the lead frame in the depression.
    Type: Application
    Filed: October 26, 2009
    Publication date: August 5, 2010
    Applicant: EVERLIGHT ELECTRONICS CO., LTD.
    Inventor: Yu-Huan Liu
  • Publication number: 20100163892
    Abstract: A light emitting diode (LED) device including a transparent substrate, a plurality of LED chips, a circuit, and a transparent encapsulant is provided. The LED chips are fixed on the transparent substrate, and utilized for radiating at least a light beam. The circuit is disposed on the transparent substrate and electrically connected to the LED chips. The transparent encapsulant is utilized for packaging the LED chips. The light beam of the LED chips can propagate from two opposite sides of the transparent substrate. Blue LED chips and the circuit of the transparent substrate can be directly soldered, and the phosphors are arranged to convert the wavelength of blue light, so a dual-side white light emitting device can therefore be provided.
    Type: Application
    Filed: December 29, 2009
    Publication date: July 1, 2010
    Inventor: Yu-Huan Liu
  • Patent number: 7718551
    Abstract: A method for forming a photoresist layer is provided. The method includes following steps. A wafer is provided in a semiconductor machine. The wafer is spun at a first spin speed. A pre-wet solvent is dispensed on the spinning wafer by using a nozzle disposed at a fixed position. The pre-wet solvent then stops dispensing. The spin speed of the wafer is adjusted from the first spin speed to a second spin speed which is faster than the first spin speed. Thereafter, a photoresist layer is coated on the wafer.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: May 18, 2010
    Assignee: United MIcroelectronics Corp.
    Inventors: Yu-Huan Liu, Chih-Jung Chen, Chih-Chung Huang
  • Publication number: 20090227120
    Abstract: A method for forming a photoresist layer is provided. The method includes following steps. A wafer is provided in a semiconductor machine. The wafer is spun at a first spin speed. A pre-wet solvent is dispensed on the spinning wafer by using a nozzle disposed at a fixed position. The pre-wet solvent then stops dispensing. The spin speed of the wafer is adjusted from the first spin speed to a second spin speed which is faster than the first spin speed. Thereafter, a photoresist layer is coated on the wafer.
    Type: Application
    Filed: March 7, 2008
    Publication date: September 10, 2009
    Applicant: UNITED MICROELECTRONICS CORP.
    Inventors: Yu-Huan Liu, Chih-Jung Chen, Chih-Chung Huang
  • Publication number: 20090153024
    Abstract: A white-light emitting device comprises a substrate, a short wavelength light source, a protective layer, a first structure, and a second structure. The short wavelength light source is disposed on the substrate for generating a first light, and the protective layer covering the short wavelength light source is pervious to the first light. The first structure is disposed on the protective layer for generating a second light, in which the first structure includes a first quantum well and a transmission layer. The second structure is disposed on the first structure for generating a third light. Finally, the first light, the second light, and the third light are mixed to generate a white light.
    Type: Application
    Filed: April 21, 2008
    Publication date: June 18, 2009
    Applicant: AU OPTRONICS CORPORATION
    Inventors: Yu-Huan Liu, Chieh-Hsiu Lin, Chih-Lin Wang, Yun-Yi Tien
  • Publication number: 20070034834
    Abstract: A compound represented by the following formula: SrxMyAlzSi12?zN16?zO2+z wherein, M is selected from the group consisting of rare earth elements and yttrium, x>0, y>0, x+y=2, and 0?z?5. The compound may be used as a phosphor. It emits a visible light upon being excited by a blue light and/or an ultra-violet light. When M is Eu, the compound emits a yellow-green light upon being excited by a blue light and/or an ultra-violet light.
    Type: Application
    Filed: November 7, 2005
    Publication date: February 15, 2007
    Inventors: Yu-Huan Liu, Ru-Shi Liu, Yi-Shan Lin, Chuen-Ming Gee, Ching-Jang Lin, Biing-Jyh Weng, Tzong-Liang Tsai, Tzer-Perng Chen