Patents by Inventor Kok Wai Cheah

Kok Wai Cheah 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: 11837842
    Abstract: The present invention relates to a solid-state blended polymer system that has the property of tunable lasing wavelength through adjusting the blending ratio. It can be used for health monitoring, environmental monitoring sensor and tissue imaging. Current materials do not have the broad tunable range; from blue to infra-red across the optical range. By using the same two polymers, it is possible to produce laser emitting blue to red colour. It simplifies the design, eases multi-wavelength laser sensor system integration and therefore, making the production cost-effective.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: December 5, 2023
    Assignee: Hong Kong Baptist University
    Inventors: Kok Wai Cheah, Yi Jiang
  • Patent number: 11713503
    Abstract: A method for forming a substrate with a multi-layered, flexible, and anti-scratch metal oxides protective coating being deposited onto the substrate is provided in the present invention, wherein the top most layer of the coating comprises Al2O3 or a mixture thereof such that the top most layer acts as an anti-scratching layer. The multi-layered, flexible and anti-scratch metal oxides protective coating also retains the flexibility of the underlying substrate.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: August 1, 2023
    Assignees: Hong Kong Baptist University, Cathay Photonics Limited
    Inventors: Kok Wai Cheah, Wing Yui Lam, Yu Wai Chan, Shing Chi Tse, Suet Ying Ching, Hoi Lam Tam
  • Patent number: 11535926
    Abstract: A method to transfer a layer of harder thin film substrate onto a softer, flexible substrate. In particular, the present invention provides a method to deposit a layer of sapphire thin film on to a softer and flexible substrate e.g. quartz, fused silica, silicon, glass, toughened glass, PET, polymers, plastics, paper and fabrics. This combination provides the hardness of sapphire thin film to softer flexible substrates.
    Type: Grant
    Filed: January 21, 2019
    Date of Patent: December 27, 2022
    Assignee: HKBU R&D LICENSING LIMITED
    Inventors: Kok Wai Cheah, Wing Yui Lam, Hoi Lam Tam
  • Publication number: 20210203122
    Abstract: The present invention relates to a solid-state blended polymer system that has the property of tunable lasing wavelength through adjusting the blending ratio. It can be used for health monitoring, environmental monitoring sensor and tissue imaging. Current materials do not have the broad tunable range; from blue to infra-red across the optical range. By using the same two polymers, it is possible to produce laser emitting blue to red colour. It simplifies the design, eases multi-wavelength laser sensor system integration and therefore, making the production cost-effective.
    Type: Application
    Filed: December 7, 2020
    Publication date: July 1, 2021
    Inventors: Kok Wai CHEAH, Yi JIANG
  • Patent number: 11028471
    Abstract: A composition of AR layer that is aimed to match the refractive index of the underlying substrate e.g. glass, chemically strengthened glass, plastics etc., so as maximum light is transmitting through it. For a device with an sapphire film for anti-scratch protection, because sapphire has a different refractive index to that of the substrate, therefore existing AR layer will not function as well as it should; not only the transmitted light is reduced in quantity, its transmitted range will be changed such that imaging or display color is compromised. Therefore an integrated AR with sapphire film with the top most AR layer as Al2O3 which also acts as anti-scratching layer will eliminate this problem. This claim involves replacing one of the materials for AR layer is Al2O3 such that the top most AR layer as Al2O3 which also acts as anti-scratching layer.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: June 8, 2021
    Assignee: HKBU R&D LICENSING LIMITED
    Inventors: Kok Wai Cheah, Wing Yui Lam, Yu Wai Chan
  • Patent number: 10941480
    Abstract: A method to transfer a layer of harder thin film substrate onto a softer, flexible substrate. In particular, the present invention provides a method to deposit a layer of sapphire thin film on to a softer and flexible substrate e.g. PET, polymers, plastics, paper and fabrics. This combination provides the hardness of sapphire thin film to softer flexible substrates.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: March 9, 2021
    Assignee: HKBU R&D LICENSING LIMITED
    Inventors: Kok Wai Cheah, King Fai Li, Hoi Lam Tam, Guixin Li, Wing Yui Lam, Yu Wai Chan
  • Publication number: 20190249292
    Abstract: A method for forming a substrate with a multi-layered, flexible, and anti-scratch metal oxides protective coating being deposited onto the substrate is provided in the present invention, wherein the top most layer of the coating comprises Al2O3 or a mixture thereof such that the top most layer acts as an anti-scratching layer. The multi-layered, flexible and anti-scratch metal oxides protective coating also retains the flexibility of the underlying substrate.
    Type: Application
    Filed: April 24, 2019
    Publication date: August 15, 2019
    Inventors: Kok Wai CHEAH, Wing Yui LAM, Yu Wai CHAN, Shing Chi TSE, Suet Ying CHING, Hoi Lam TAM
  • Publication number: 20190242004
    Abstract: A composition of AR layer that is aimed to match the refractive index of the underlying substrate e.g. glass, chemically strengthened glass, plastics etc., so as maximum light is transmitting through it. For a device with an sapphire film for anti-scratch protection, because sapphire has a different refractive index to that of the substrate, therefore existing AR layer will not function as well as it should; not only the transmitted light is reduced in quantity, its transmitted range will be changed such that imaging or display color is compromised. Therefore an integrated AR with sapphire film with the top most AR layer as Al2O3 which also acts as anti-scratching layer will eliminate this problem. This claim involves replacing one of the materials for AR layer is Al2O3 such that the top most AR layer as Al2O3 which also acts as anti-scratching layer.
    Type: Application
    Filed: September 27, 2017
    Publication date: August 8, 2019
    Inventors: Kok Wai CHEAH, Wing Yui LAM, Yu Wai CHAN
  • Publication number: 20190169735
    Abstract: The present disclosure relates to display, windows, camera cover, lens and lens cover, optical/infra-red sensors, glasses and spectacles.
    Type: Application
    Filed: February 4, 2019
    Publication date: June 6, 2019
    Inventors: Kok Wai CHEAH, Shing Chi TSE, Hoi Lam TAM
  • Publication number: 20190169734
    Abstract: A method to transfer a layer of harder thin film substrate onto a softer, flexible substrate. In particular, the present invention provides a method to deposit a layer of sapphire thin film on to a softer and flexible substrate e.g. quartz, fused silica, silicon, glass, toughened glass, PET, polymers, plastics, paper and fabrics.
    Type: Application
    Filed: January 21, 2019
    Publication date: June 6, 2019
    Inventors: Kok Wai CHEAH, Wing Yui LAM, Hoi Lam TAM
  • Patent number: 10227689
    Abstract: A method to transfer a layer of harder thin film substrate onto a softer, flexible substrate. In particular, the present invention provides a method to deposit a layer of sapphire thin film on to a softer and flexible substrate e.g. quartz, fused silica, silicon, glass, toughened glass, PET, polymers, plastics, paper and fabrics. This combination provides the hardness of sapphire thin film to softer flexible substrates.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: March 12, 2019
    Assignee: Hong Kong Baptist University
    Inventors: Kok Wai Cheah, Wing Yui Lam, Hoi Lam Tam
  • Patent number: 10191193
    Abstract: The present invention relates to a nano bi-material, electromagnetic spectrum shifter based on said nano bi-material and method to produce said electromagnetic spectrum shifter using said nano bi-material. In particular, the present invention provides nano bi-material based electromagnetic spectrum shifter, e.g. color filters, with a wide range of transmission and color tunability and methods to produce said color filters. The present invention has applications in color filtration and production of color filters; reflector and production of reflectors; and electromagnetic spectrum shifter and production of electromagnetic spectrum shifters.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: January 29, 2019
    Assignee: Hong Kong Baptist University
    Inventors: Kok Wai Cheah, Suet Ying Ching
  • Publication number: 20180347028
    Abstract: A method to transfer a layer of harder thin film substrate onto a softer, flexible substrate. In particular, the present invention provides a method to deposit a layer of sapphire thin film on to a softer and flexible substrate e.g. PET, polymers, plastics, paper and fabrics. This combination provides the hardness of sapphire thin film to softer flexible substrates.
    Type: Application
    Filed: August 9, 2018
    Publication date: December 6, 2018
    Inventors: Kok Wai CHEAH, King Fai LI, Hoi Lam TAM, Guixin LI, Wing Yui LAM, Yu Wai CHAN
  • Patent number: 10072329
    Abstract: A method to transfer a layer of harder thin film substrate onto a softer, flexible substrate. In particular, the present invention provides a method to deposit a layer of sapphire thin film on to a softer and flexible substrate e.g. PET, polymers, plastics, paper and fabrics. This combination provides the hardness of sapphire thin film to softer flexible substrates.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: September 11, 2018
    Assignee: Hong Kong Baptist University
    Inventors: Kok Wai Cheah, King Fai Li, Hoi Lam Tam, Ka Suen Lee, Guixin Li, Wing Yui Lam, Yu Wai Chan
  • Publication number: 20180202036
    Abstract: A method to transfer a layer of harder thin film substrate onto a softer, flexible substrate. In particular, the present invention provides a method to deposit a layer of sapphire thin film on to a softer and flexible substrate e.g. quartz, fused silica, silicon, glass, toughened glass, PET, polymers, plastics, paper and fabrics. This combination provides the hardness of sapphire thin film to softer flexible substrates.
    Type: Application
    Filed: February 15, 2018
    Publication date: July 19, 2018
    Inventors: Kok Wai CHEAH, Wing Yui LAM, Hoi Lam TAM
  • Patent number: 9932663
    Abstract: A method to transfer a layer of harder thin film substrate onto a softer, flexible substrate. In particular, the present invention provides a method to deposit a layer of sapphire thin film on to a softer and flexible substrate e.g. quartz, fused silica, silicon, glass, toughened glass, PET, polymers, plastics, paper and fabrics. This combination provides the hardness of sapphire thin film to softer flexible substrates.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: April 3, 2018
    Assignee: HONG KONG BAPTIST UNIVERSITY
    Inventors: Kok Wai Cheah, Wing Yui Lam, Hoi Lam Tam
  • Patent number: 9923339
    Abstract: This invention relates to a tunable amplified spontaneous emission (ASE) laser source comprising at least two laser sources excited by a single pump laser. More particularly, the present invention relates to a tunable amplified spontaneous emission (ASE) laser source comprising at least two laser sources excited by a single pump laser wherein said at least two laser sources each comprise an organic laser or a cascaded organic laser. The invention is used for providing a tunable amplified spontaneous emission (ASE) laser source comprising at least two laser sources excited by a single pump laser.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: March 20, 2018
    Assignee: HONG KONG BAPTIST UNIVERSITY
    Inventors: Kin Long Chan, Gui Xin Li, Ka Suen Lee, Kok Wai Cheah
  • Publication number: 20170260620
    Abstract: A method to transfer a layer of harder thin film substrate onto a softer, flexible substrate. In particular, the present invention provides a method to deposit a layer of sapphire thin film on to a softer and flexible substrate e.g. quartz, fused silica, silicon, glass, toughened glass, PET, polymers, plastics, paper and fabrics. This combination provides the hardness of sapphire thin film to softer flexible substrates.
    Type: Application
    Filed: May 17, 2017
    Publication date: September 14, 2017
    Inventors: Kok Wai CHEAH, Wing Yui LAM, Hoi Lam TAM
  • Patent number: 9695501
    Abstract: A method to deposit a layer of harder thin film substrate onto a softer substrate. In particular, the present invention provides a method to deposit a layer of sapphire thin film on to a softer substrate e.g. quartz, fused silica, silicon and (toughen) glass. This combination is better than pure sapphire substrate.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: July 4, 2017
    Assignee: HONG KONG BAPTIST UNIVERSITY
    Inventors: Kok Wai Cheah, King Fai Li, Hoi Lam Tam, Wing Yui Lam, Ka Suen Lee
  • Publication number: 20170163011
    Abstract: This invention relates to a tunable amplified spontaneous emission (ASE) laser source comprising at least two laser sources excited by a single pump laser. More particularly, the present invention relates to a tunable amplified spontaneous emission (ASE) laser source comprising at least two laser sources excited by a single pump laser wherein said at least two laser sources each comprise an organic laser or a cascaded organic laser. The invention is used for providing a tunable amplified spontaneous emission (ASE) laser source comprising at least two laser sources excited by a single pump laser.
    Type: Application
    Filed: February 20, 2017
    Publication date: June 8, 2017
    Inventors: Kin Long Chan, Gui Xin Li, Ka Suen Lee, Kok Wai Cheah