Patents by Inventor Chi Keung Chan

Chi Keung Chan 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: 8487326
    Abstract: An LED package and a lead frame include a reflector cup having a bottom surface with an LED asymmetrically positioned on the bottom surface and a wall surface inclined relative to the bottom surface and defining an opening at an upper end thereof. The bottom surface of the reflector cup has a first axial dimension along a first axis and a second axial dimension along a second axis, orthogonal to the first axis. A display having an asymmetrical FFP and asymmetrical screen curve includes an array of the LED modules including a plurality of LED packages. At least some of the LED packages include a dome-shaped lens asymmetrically positioned with respect to a geometric center of the bottom surface of the reflector cup.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: July 16, 2013
    Assignee: Cree, Inc.
    Inventors: Chi Keung Chan, Zhi Kuan Zhang, Yue Kwong Lau, Xiang Fei, Hao Liu, Ju Zuo Sheng, David Todd Emerson
  • Publication number: 20130015738
    Abstract: An end cap assembly for an electric motor has an end cap body and at least two motor terminals. The end cap body has at least two holding structures for respectively holding the at least two motor terminals, each holding structure having at least one holder and a through slot. Each motor terminal has a base portion, a terminal portion and at least one mounting portion. The at least one mounting portion is mounted to the at least one holder of a corresponding holding structure. The terminal portion is inserted in the through slot to electrically connect to a male terminal of an external power supply plug. The terminal portion and the at least one mounting portion integrally extend from the base portion.
    Type: Application
    Filed: July 12, 2012
    Publication date: January 17, 2013
    Inventors: Chi Keung CHAN, Wu Chuan LIU
  • Patent number: 8350370
    Abstract: The present invention is directed to LED packages and LED displays utilizing LED packages where the peak emission of the LED displays can exhibit improved emission characteristics. In some embodiments the improved characteristics include a wider horizontal emission angle for the LED packages according to the present invention, which results in improved emission characteristics for the LED display such as a wider far field pattern. This provides improved picture intensity and quality when viewing the display at different horizontal viewing angles. Different embodiments also provide for improved emission characteristics for LED packages emitting different colors of light when viewing at different vertical angles. In one embodiment the red and green LED packages can have emission patterns that are substantially the same at different vertical viewing angles within a range. This helps the colors of the display appear consistent at those angles.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: January 8, 2013
    Assignee: Cree Huizhou Opto Limited
    Inventors: Chi Keung Chan, Zhang Zhikuan, Yue Kwong Lau, Hao Liu, Xiang Fei, Meigui Luo, Juzuo Sheng
  • Publication number: 20120132937
    Abstract: The present invention is directed to LED packages and methods utilizing waterproof and UV resistant packages with improved structural integrity. In some embodiments, the improved structural integrity is provided by various features in the lead frame that the casing material encompasses to improve the adhesion between the lead frame and the casing for a stronger, waterproof package. Moreover, in some embodiments the improved structural integrity and waterproofing is further provided by improved adhesion between the encapsulant and the casing. Some embodiments also provide for improved wire bonds, with the length, thickness, and loop height of the wire bonds controlled and optimized for improved adhesion between the wire bonds and the encapsulant as well as improved reliability.
    Type: Application
    Filed: November 30, 2010
    Publication date: May 31, 2012
    Inventors: ALEX CHI KEUNG CHAN, Charles Chak Hau Pang, Li Fei Hong
  • Publication number: 20120120118
    Abstract: LED devices includes a lead frame having a reflector cup with a round bottom surface and a wall surface having a variable inclination with respect to the bottom surface and defining an opening at an upper end thereof. An LED is mounted on the bottom surface of the reflector cup, and an LED module includes first and second LED device that emit different colors. The first and second LED devices have substantially matched far field patterns in a first and second direction, where a first viewing angle in the first direction is less than about 99°.
    Type: Application
    Filed: June 15, 2011
    Publication date: May 17, 2012
    Inventors: Chi Keung Chan, Zhi Kuan Zhang, Xiang Fei, Hao Liu, Ju Zuo Sheng, David Todd Emerson
  • Publication number: 20120119230
    Abstract: An LED package and a lead frame include a reflector cup having a bottom surface with an LED asymmetrically positioned on the bottom surface and a wall surface inclined relative to the bottom surface and defining an opening at an upper end thereof. The bottom surface of the reflector cup has a first axial dimension along a first axis and a second axial dimension along a second axis, orthogonal to the first axis. A display having an asymmetrical FFP and asymmetrical screen curve includes an array of the LED modules including a plurality of LED packages. At least some of the LED packages include a dome-shaped lens asymmetrically positioned with respect to a geometric center of the bottom surface of the reflector cup.
    Type: Application
    Filed: June 15, 2011
    Publication date: May 17, 2012
    Inventors: Chi Keung CHAN, Zhi Kuan Zhang, Yue Kwong Lau, Xiang Fei, Hao Liu, Ju Zuo Sheng, David Todd Emerson
  • Publication number: 20120104427
    Abstract: One embodiment of the surface mount LED package includes a lead frame and a plastic casing at least partially encasing the lead frame. The lead frame includes a plurality of electrically conductive chip carriers. There is an LED disposed on each one of the plurality of electrically conductive chip carriers. A profile height of the surface mount LED package is less than about 1.0 mm.
    Type: Application
    Filed: June 6, 2011
    Publication date: May 3, 2012
    Inventors: Chi Keung Chan, Chak Hau Pang, Fei Hong Li, Yue Kwong Lau, Jun Zhang, David Todd Emerson
  • Publication number: 20120104426
    Abstract: The present invention is directed to leadless LED packages and LED displays utilizing white ceramic casings and thin/low profile packages with improved color mixing and structural integrity. In some embodiments, the improved color mixing is provided, in part, by the white ceramic package casing, which can help reflect light emitted from each LED in many directions away from the device. The non-linear arrangement of the LEDs can also contribute to improved color-mixing. The improved structural integrity can be provided by various features in the bond pads that cooperate with the casing for a stronger package structure. Moreover, in some embodiments the thinness/low profile of each package is attributed to its leadless structure, with the bond pads and electrodes electrically connected via through-holes.
    Type: Application
    Filed: November 3, 2010
    Publication date: May 3, 2012
    Inventors: Alex Chi Keung Chan, Charles Chak Hau Pang, Victor Yue Kwong Lau
  • Publication number: 20120025227
    Abstract: The present invention is directed to LED packages and LED displays utilizing water resistant packages with improved structural integrity and customizable attributes. In some embodiments, the improved structural integrity is provided by various features in the lead frame that the casing material encompasses to improve the adhesion between the lead frame and the casing for a stronger, water resistant package. Moreover, in some embodiments the improved structural integrity and water resistance is further provided by cavity features that improve adhesion between the cavity and a protective encapsulant. Some embodiments also provide for packages with a greater overall height than the length of their side-exposed solder pins, which improves gel coverage of the side-exposed solder pins between adjacent packages.
    Type: Application
    Filed: July 27, 2011
    Publication date: February 2, 2012
    Inventors: ALEX CHI KEUNG CHAN, Charles Chak Hau Pang
  • Publication number: 20110248293
    Abstract: The present invention is directed to LED packages and LED displays utilizing thin/low profile LED packages with improved structural integrity, emission characteristics, and customizable attributes. In some embodiments the improved structural integrity is provided by various features in the lead frame that cooperate with the casing for a stronger package. Moreover, in some embodiments the improved emission characteristics are provided by cavity features such as shape and depth, which provide for increased surface bonding area for multiple LED chips and increased viewing angle, respectively. Some embodiments also provide for gradated packages having customizable top portions for applications using smaller packages, with bottom portions comprising dimensions compatible with customary mechanical/electrical supports.
    Type: Application
    Filed: April 12, 2010
    Publication date: October 13, 2011
    Inventors: Alex Chi Keung Chan, Charles Chak Hau Pang, Ruan Fei Fei
  • Publication number: 20110186865
    Abstract: The present invention is directed to LED packages and LED displays utilizing LED packages where the peak emission of the LED displays can exhibit improved emission characteristics. In some embodiments the improved characteristics include a wider horizontal emission angle for the LED packages according to the present invention, which results in improved emission characteristics for the LED display such as a wider far field pattern. This provides improved picture intensity and quality when viewing the display at different horizontal viewing angles. Different embodiments also provide for improved emission characteristics for LED packages emitting different colors of light when viewing at different vertical angles. In one embodiment the red and green LED packages can have emission patterns that are substantially the same at different vertical viewing angles within a range. This helps the colors of the display appear consistent at those angles.
    Type: Application
    Filed: January 29, 2010
    Publication date: August 4, 2011
    Inventors: Chi Keung Chan, Zhang Zhikuan, Yue Kwong Lau, Hao Liu, Xiang Fei, Meigui Luo, Juzuo Sheng
  • Publication number: 20110042698
    Abstract: The present invention is directed to LED packages and LED displays utilizing the LED packages, wherein the LED chips within the packages are arranged in unique orientations to provide the desired package or display FFP. One LED package according to the present invention comprises a reflective cup and an LED chip mounted in the reflective cup. The reflective cup has a first axis and a second axis orthogonal to the first axis, wherein the LED chip is rotated within the reflective cup so that the LED chip is out of alignment with said first axis. Some of the LED packages can comprise a rectangular LED chip having a chip longitudinal axis and an oval shaped reflective cup having a cup longitudinal axis. The LED chip is mounted within the reflective cup with the chip longitudinal axis angled from the cup longitudinal axis.
    Type: Application
    Filed: August 25, 2010
    Publication date: February 24, 2011
    Inventors: Alex Chi Keung Chan, David Todd Emerson
  • Publication number: 20110037083
    Abstract: LED packages and LED displays utilizing the LED packages are disclosed, with the LED packages arranged to provide good contrast between the different pixels in an LED display while not reducing the perceived luminous flux or brightness of the display. One embodiment of an LED package comprises an LED chip and conversion material arranged to convert at least some light emitted from the LED chip. The package emits light from the conversion material or a combination of light from the conversion material and the LED chip. A reflective area is included around the LED chip that substantially reflects the package light and a contrasting area is included outside the reflective area and has a color that contrasts with the package light. LED displays according to the present invention comprise a plurality of LED packages arranged in relation to one another to produce messages or images, with the package providing improved pixel contrast.
    Type: Application
    Filed: September 3, 2010
    Publication date: February 17, 2011
    Inventors: ALEX CHI KEUNG CHAN, DAVID EMERSON, CHAK HAU PANG, JUN ZHANG
  • Publication number: 20110001149
    Abstract: LED packages and LED displays utilizing the LED packages are disclosed where the peak emission of the LED display can be tilted or shifted to customize its peak emission to the mounting height or location of the LED display. One embodiment of an LED display comprises a plurality of LED package where the peak emission from at least some of the LED packages is tilted off the package centerline. The LED packages are mounted within the display in such a way as to generate an image having a peak emission that is tilted off the perpendicular emission direction of the display.
    Type: Application
    Filed: July 6, 2009
    Publication date: January 6, 2011
    Inventors: Chi Keung Chan, Yue Kwong Lau, Zhang Zhikuan, Yan Xingtao
  • Publication number: 20090072251
    Abstract: In one embodiment, a surface-mount device comprises a casing having opposed, first and second main surfaces, side surfaces, and end surfaces. A lead frame partially encased by the casing comprises (1) an electrically conductive LED chip carrier part having a surface carrying a linear array of three LEDs adapted to be energized to produce in combination a substantially full range of colors, each LED having a first electrical terminal and a second electrical terminal, the first terminal of each of the three LEDs being electrically and thermally coupled to the chip carrying surface of the chip carrier part; and (2) three electrically conductive connection parts separate from the chip carrier part, each of the three connection parts having a connection pad, the second terminal of each of the three LEDs being electrically coupled to the connection pad of a corresponding one of the three connection parts with a single wire bond.
    Type: Application
    Filed: December 14, 2007
    Publication date: March 19, 2009
    Inventors: Alex Chi Keung Chan, Xuan Wang
  • Patent number: D567177
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: April 22, 2008
    Assignee: Johnson Electric S.A.
    Inventor: Chi Keung Chan
  • Patent number: D684545
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: June 18, 2013
    Assignee: Cree Huizhou Solid State Lighting Company Limited
    Inventors: Chi Keung Chan, Chak Hau Pang, Fei Hong Li, David Todd Emerson