Patents by Inventor Pochi Yeh

Pochi Yeh 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: 7527834
    Abstract: The compensator design, which comprises at least two layers of birefringent material, one of them is a positive A-plate and another one is a negative A-plate, makes possible a significant improvement in color rendering properties and contrast ratios of liquid crystal displays over a wide range of viewing angle.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: May 5, 2009
    Assignee: Nitto Denko Corporation
    Inventors: Michael V. Paukshto, Pochi Yeh
  • Patent number: 7453640
    Abstract: Devices of information displays, in particular liquid crystal displays, which can be utilized in indication devices for various purposes. Liquid crystal displays, according to this disclosure, contain at least one layer of liquid crystal placed between two plates, on each plate there has been formed or applied at least one electrode or a system of electrodes, or an active matrix, and at least one layer of polarizer; while at least one polarizing layer is an E-type polarizer and at least one polarizing layer is an O-type polarizer.
    Type: Grant
    Filed: January 7, 2006
    Date of Patent: November 18, 2008
    Assignee: Nitto Denko Corporation
    Inventors: Pochi Yeh, Alla Y Sakharova, Yuri A Bobrov
  • Patent number: 7324181
    Abstract: The present invention relates to the field of color filters, in particular, to a non-absorbing polarization color filters and to high-brightness color liquid crystal display panel with improved image contrast employing non-absorbing polarization color filters and light recycling among neighboring subpixels. The disclosed invention represents a non-absorbing polarization color filter comprising the following elements: a rear broadband multilayer lossless polarizer, a front broadband multilayer lossless polarizer, and a color polarization rotator. The rear broadband multilayer lossless polarizer has a predefined-oriented transmission axis AB. Said front broadband multilayer lossless polarizer is located approximately in parallel with the rear broadband multilayer lossless polarizer, and has a transmission axis approximately parallel or approximately orthogonal with respect to transmission axis AB.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: January 29, 2008
    Assignee: Nitto Denko Corporation
    Inventors: Pavel I. Lazarev, Michael V. Paukshto, Louis D. Silverstein, Pochi Yeh
  • Patent number: 7315338
    Abstract: The disclosure pertains to the devices of information displays, in particular liquid crystal displays, and could be utilized in indication devices for various purposes. Liquid crystal displays, according to this disclosure, contain at least one layer of liquid crystal placed between two plates, on each plates there has been formed or applied at least one electrode or a system of electrodes, or an active matrix, and at least one layer of polarizer; while at least one polarizing layer is the E-type polarizer and at least one polarizing layer is an O-type polarizer. The polarizer, according to the invention, consists of at least two polarizers, at least one of which is the E-type polarizer and at least one is the O-type polarizer.
    Type: Grant
    Filed: January 7, 2006
    Date of Patent: January 1, 2008
    Assignee: Nitto Denko Corporation
    Inventors: Pochi Yeh, Alla Y. Sakharova, Yuri A. Bobrov
  • Publication number: 20060292372
    Abstract: The compensator design, which comprises at least two layers of birefringent material, one of them is a positive A-plate and another one is a negative A-plate, makes possible a significant improvement in color rendering properties and contrast ratios of liquid crystal displays over a wide range of viewing angle.
    Type: Application
    Filed: August 11, 2005
    Publication date: December 28, 2006
    Inventors: Michael Paukshto, Pochi Yeh
  • Publication number: 20060114375
    Abstract: The disclosure pertains to the devices of information displays, in particular liquid crystal displays, and could be utilized in indication devices for various purposes. Liquid crystal displays, according to this disclosure, contain at least one layer of liquid crystal placed between two plates, on each plates there has been formed or applied at least one electrode or a system of electrodes, or an active matrix, and at least one layer of polarizer; while at least one polarizing layer is the E-type polarizer and at least one polarizing layer is an O-type polarizer. The polarizer, according to the invention, consists of at least two polarizers, at least one of which is the E-type polarizer and at least one is the O-type polarizer.
    Type: Application
    Filed: January 7, 2006
    Publication date: June 1, 2006
    Inventors: Pochi Yeh, Alla Sakharova, Yuri Bobrov
  • Publication number: 20060114384
    Abstract: The disclosure pertains to the devices of information displays, in particular liquid crystal displays, and could be utilized in indication devices for various purposes. Liquid crystal displays, according to this disclosure, contain at least one layer of liquid crystal placed between two plates, on each plates there has been formed or applied at least one electrode or a system of electrodes, or an active matrix, and at least one layer of polarizer; while at least one polarizing layer is the E-type polarizer and at least one polarizing layer is an O-type polarizer. The polarizer, according to the invention, consists of at least two polarizers, at least one of which is the E-type polarizer and at least one is the O-type polarizer.
    Type: Application
    Filed: January 7, 2006
    Publication date: June 1, 2006
    Inventors: Pochi Yeh, Alla Sakharova, Yuri Bobrov
  • Publication number: 20060114376
    Abstract: The disclosure pertains to the devices of information displays, in particular liquid crystal displays, and could be utilized in indication devices for various purposes. Liquid crystal displays, according to this disclosure, contain at least one layer of liquid crystal placed between two plates, on each plates there has been formed or applied at least one electrode or a system of electrodes, or an active matrix, and at least one layer of polarizer; while at least one polarizing layer is the E-type polarizer and at least one polarizing layer is an O-type polarizer. The polarizer, according to the invention, consists of at least two polarizers, at least one of which is the E-type polarizer and at least one is the O-type polarizer.
    Type: Application
    Filed: January 7, 2006
    Publication date: June 1, 2006
    Inventors: Pochi Yeh, Alla Sakharova, Yuri Bobrov
  • Patent number: 7015990
    Abstract: The disclosure pertains to the devices of information displays, in particular liquid crystal displays, and could be utilized in indication devices for various purposes. Liquid crystal displays, according to this disclosure, contain at least one layer of liquid crystal placed between two plates, on each plates there has been formed or applied at least one electrode or a system of electrodes, or an active matrix, and at least one layer of polarizer; while at least one polarizing layer is the E-type polarizer and at least one polarizing layer is an O-type polarizer. The polarizer, according to the invention, consists of at least two polarizers, at least one of which is the E-type polarizer and at least one is the O-type polarizer.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: March 21, 2006
    Assignee: Nitto Denko Corporation
    Inventors: Pochi Yeh, Alla Y. Sakharova, Yuri A. Bobrov
  • Publication number: 20050231661
    Abstract: The present invention relates to the field of color filters, in particular, to a non-absorbing polarization color filters and to high-brightness color liquid crystal display panel with improved image contrast employing non-absorbing polarization color filters and light recycling among neighboring subpixels. The disclosed invention represents a non-absorbing polarization color filter comprising the following elements: a rear broadband multilayer lossless polarizer, a front broadband multilayer lossless polarizer, and a color polarization rotator. The rear broadband multilayer lossless polarizer has a predefined-oriented transmission axis AB. Said front broadband multilayer lossless polarizer is located approximately in parallel with the rear broadband multilayer lossless polarizer, and has a transmission axis approximately parallel or approximately orthogonal with respect to transmission axis AB.
    Type: Application
    Filed: April 7, 2005
    Publication date: October 20, 2005
    Inventors: Pavel Lazarev, Michael Paukshto, Louis Silverstein, Pochi Yeh
  • Publication number: 20040105049
    Abstract: The disclosure pertains to the devices of information displays, in particular liquid crystal displays, and could be utilized in indication devices for various purposes. Liquid crystal displays, according to this disclosure, contain at least one layer of liquid crystal placed between two plates, on each plates there has been formed or applied at least one electrode or a system of electrodes, or an active matrix, and at least one layer of polarizer; while at least one polarizing layer is the E-type polarizer and at least one polarizing layer is an O-type polarizer. The polarizer, according to the invention, consists of at least two polarizers, at least one of which is the E-type polarizer and at least one is the O-type polarizer.
    Type: Application
    Filed: April 14, 2003
    Publication date: June 3, 2004
    Inventors: Pochi Yeh, Alla Sakharova, Yuri A Bobrov
  • Patent number: 6429915
    Abstract: The present invention provides a liquid crystal display apparatus and a method for viewing liquid crystal displays over a wide range of viewing angles with minimal loss in image contrast and gray level. Prior art liquid crystal displays (LCDs) exhibit low contrast and gray level inversion when viewed at large viewing angles. Prior art solutions to these problems include using a phase retardation plate or film interposed between the liquid crystal layer and a polarizer layer as an optical compensator. While such a solution improves image contrast and reduces some undesirable angular effects, the fabrication of such phase retardation compensator films requires precise thickness control and is expensive.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: August 6, 2002
    Assignee: Santa Barbara Photonics, Inc.
    Inventors: Pochi Yeh, Claire Gu