Patents by Inventor Wai Y. Leung
Wai Y. Leung 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: 9401442Abstract: A three-dimensional, microscale-textured, grating-shaped organic solar cell geometry. The solar cells are fabricated on gratings to give them a three-dimensional texture that provides enhanced light absorption. Introduction of microscale texturing has a positive effect on the overall power conversion efficiency of the devices. This grating-based solar cell having a grating of pre-determined pitch and height has shown improved power-conversion efficiency over a conventional flat solar cell. The improvement in efficiency is accomplished by homogeneous coverage of the grating with uniform thickness of the active layer, which is attributed to a sufficiently high pitch and low height of the underlying gratings. Also the microscale texturing leads to suppressed reflection of incident light due to the efficient coupling of the incident light into modes that are guided in the active layer.Type: GrantFiled: September 1, 2011Date of Patent: July 26, 2016Assignee: Iowa State University Research Foundation, Inc.Inventors: Sumit Chaudhary, Kai-Ming Ho, Joong-Mok Park, Kanwar Singh Nalwa, Wai Y. Leung
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Patent number: 8742406Abstract: Provided are microlens arrays for use on the substrate of OLEDs to extract more light that is trapped in waveguided modes inside the devices and methods of manufacturing same. Light extraction with microlens arrays is not limited to the light emitting area, but is also efficient in extracting light from the whole microlens patterned area where waveguiding occurs. Large microlens array, compared to the size of the light emitting area, extract more light and result in over 100% enhancement. Such a microlens array is not limited to (O)LEDs of specific emission, configuration, pixel size, or pixel shape. It is suitable for all colors, including white, for microcavity OLEDs, and OLEDs fabricated directly on the (modified) microlens array.Type: GrantFiled: February 16, 2012Date of Patent: June 3, 2014Assignee: Iowa State University Research Foundation, Inc.Inventors: Wai Y. Leung, Joong-Mok Park, Zhengqing Gan, Kristen P. Constant, Joseph Shinar, Ruth Shinar, Kai-Ming Ho
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Publication number: 20120048368Abstract: A three-dimensional, microscale-textured, grating-shaped organic solar cell geometry. The solar cells are fabricated on gratings to give them a three-dimensional texture that provides enhanced light absorption. Introduction of microscale texturing has a positive effect on the overall power conversion efficiency of the devices. This grating-based solar cell having a grating of pre-determined pitch and height has shown improved power-conversion efficiency over a conventional flat solar cell. The improvement in efficiency is accomplished by homogeneous coverage of the grating with uniform thickness of the active layer, which is attributed to a sufficiently high pitch and low height of the underlying gratings. Also the microscale texturing leads to suppressed reflection of incident light due to the efficient coupling of the incident light into modes that are guided in the active layer.Type: ApplicationFiled: September 1, 2011Publication date: March 1, 2012Applicant: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.Inventors: Sumit Chaudhary, Kai-Ming Ho, Joong-Mok Park, Kanwar Singh Nalwa, Wai Y. Leung
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Patent number: 6859974Abstract: A low pressure blower operated airknife having a housing with an elongated primary air discharge orifice for directing a narrow width curtain of air. The airknife includes an air-augmenting shroud which defines auxiliary discharge orifices on opposite longitudinal sides of the primary air discharge orifice such that air discharging from the primary discharge orifice creates a low pressure condition adjacent the auxiliary air discharge orifices for drawing additional air through the auxiliary discharge orifices which augments the velocity and volume of the discharging air current without the necessity for increasing the air inlet pressure or blower size. The shroud may take alternative forms, including pairs of wings disposed on opposite sides of the primary discharge orifice or hollow structures that surround the airknife housing. The airknife further is adapted for low pressure direction and application of air laden particles, such as preatomized liquid particles.Type: GrantFiled: January 27, 2004Date of Patent: March 1, 2005Assignee: Spraying Systems Co.Inventors: James Haruch, Wai Y. Leung, Emily Smith, Timothy H. Hennessy
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Publication number: 20040182681Abstract: A low pressure blower operated airknife having a housing with an elongated primary air discharge orifice for directing a narrow width curtain of air. The airknife includes an air-augmenting shroud which defines auxiliary discharge orifices on opposite longitudinal sides of the primary air discharge orifice such that air discharging from the primary discharge orifice creates a low pressure condition adjacent the auxiliary air discharge orifices for drawing additional air through the auxiliary discharge orifices which augments the velocity and volume of the discharging air current without the necessity for increasing the air inlet pressure or blower size. The shroud may take alternative forms, including pairs of wings disposed on opposite sides of the primary discharge orifice or hollow structures that surround the airknife housing. The airknife further is adapted for low pressure direction and application of air laden particles, such as preatomized liquid particles.Type: ApplicationFiled: January 27, 2004Publication date: September 23, 2004Applicant: Spraying Systems Co.Inventors: James Haruch, Wai Y. Leung, Emily Smith, Timothy H. Hennessy
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Patent number: 6702101Abstract: A low pressure blower operated airknife having a housing with an elongated primary air discharge orifice for directing a narrow width curtain of air. The airknife includes an air-augmenting shroud which defines auxiliary discharge orifices on opposite longitudinal sides of the primary air discharge orifice such that air discharging from the primary discharge orifice creates a low pressure condition adjacent the auxiliary air discharge orifices for drawing additional air through the auxiliary discharge orifices which augments the velocity and volume of the discharging air current without the necessity for increasing the air inlet pressure or blower size. The shroud may take alternative forms, including pairs of wings disposed on opposite sides of the primary discharge orifice or hollow structures that surround the airknife housing. The airknife further is adapted for low pressure direction and application of air laden particles, such as preatomized liquid particles.Type: GrantFiled: December 21, 2001Date of Patent: March 9, 2004Assignee: Spraying Systems Co.Inventors: James Haruch, Wai Y. Leung, Emily Smith, Timothy H. Hennessy
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Publication number: 20030115709Abstract: A low pressure blower operated airknife having a housing with an elongated primary air discharge orifice for directing a narrow width curtain of air. The airknife includes an air-augmenting shroud which defines auxiliary discharge orifices on opposite longitudinal sides of the primary air discharge orifice such that air discharging from the primary discharge orifice creates a low pressure condition adjacent the auxiliary air discharge orifices for drawing additional air through the auxiliary discharge orifices which augments the velocity and volume of the discharging air current without the necessity for increasing the air inlet pressure or blower size. The shroud may take alternative forms, including pairs of wings disposed on opposite sides of the primary discharge orifice or hollow structures that surround the airknife housing. The airknife further is adapted for low pressure direction and application of air laden particles, such as preatomized liquid particles.Type: ApplicationFiled: December 21, 2001Publication date: June 26, 2003Applicant: Spraying Systems Co.Inventors: James Haruch, Wai Y. Leung, Emily Smith, Timothy H. Hennessy
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Patent number: D832491Type: GrantFiled: May 15, 2017Date of Patent: October 30, 2018Assignee: Molex, LLCInventors: Joseph F. Murphy, Wai Y. Leung, Thomas J. McCollum
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Patent number: D832492Type: GrantFiled: May 15, 2017Date of Patent: October 30, 2018Assignee: Molex, LLCInventors: Joseph F. Murphy, Wai Y. Leung, Thomas J. McCollum
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Patent number: D832493Type: GrantFiled: May 15, 2017Date of Patent: October 30, 2018Assignee: Molex, LLCInventors: Joseph F. Murphy, Wai Y. Leung, Thomas J. McCollum
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Patent number: D893271Type: GrantFiled: November 14, 2018Date of Patent: August 18, 2020Assignee: Molex, LLCInventors: Joseph F. Murphy, Wai Y. Leung
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Patent number: D913062Type: GrantFiled: November 14, 2018Date of Patent: March 16, 2021Assignee: Molex, LLCInventor: Wai Y. Leung