Patents by Inventor Li-Tao Hsu

Li-Tao Hsu 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: 9816032
    Abstract: The invention relates to a liquid crystal alignment agent which provides a polymer composition (A), a solvent (B), and a poly(oxyalkyleneglycol)dialkylether compound (C); wherein the number average molecular weight of the poly(oxyalkyleneglycol)dialkylether compound (C) is from 250 to 2000. The invention also provides a liquid crystal alignment film made by the liquid crystal alignment agent as mentioned above and a liquid crystal display element which provides the liquid crystal alignment film, and the liquid crystal display element has high voltage holding rate and low ion density.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: November 14, 2017
    Assignee: CHI MEI CORPORATION
    Inventor: Li-Tao Hsu
  • Patent number: 9453164
    Abstract: The invention relates to a horizontal liquid crystal alignment agent which provides a polymer (A) and a solvent (B). The polymer (A) is obtained by reacting a mixture comprising a tetracarboxylic acid dianhydride component (a) and a diamine component (b). The invention also provides a liquid crystal alignment film made by the liquid crystal alignment agent as mentioned above and a liquid crystal display element having the liquid crystal alignment film. The liquid crystal alignment film has high rubbing resistance.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: September 27, 2016
    Assignee: CHI MEI CORPORATION
    Inventor: Li-Tao Hsu
  • Publication number: 20150329781
    Abstract: A liquid crystal alignment agent having both good ultraviolet reliability and low ion density, a liquid crystal alignment film formed by the liquid crystal alignment agent, and a liquid crystal display element having the liquid crystal alignment film are provided. The liquid crystal alignment agent includes a polymer composition (A) and a solvent (B). The polymer composition (A) is obtained by reacting a mixture. The mixture includes a carboxylic anhydride component (a) and a diamine component (b). The carboxylic anhydride component (a) includes a tetracarboxylic dianhydride compound (a-1) and a tricarboxylic anhydride compound (a-2). The diamine component (b) includes a diamine compound (b-1) represented by formula (I).
    Type: Application
    Filed: May 14, 2015
    Publication date: November 19, 2015
    Inventors: Wei-Lun Chang, Li-Tao Hsu
  • Publication number: 20150329779
    Abstract: The invention relates to a horizontal liquid crystal alignment agent which provides a polymer (A) and a solvent (B). The polymer (A) is obtained by reacting a mixture comprising a tetracarboxylic acid dianhydride component (a) and a diamine component (b). The invention also provides a liquid crystal alignment film made by the liquid crystal alignment agent as mentioned above and a liquid crystal display element having the liquid crystal alignment film. The liquid crystal alignment film has high rubbing resistance.
    Type: Application
    Filed: May 13, 2015
    Publication date: November 19, 2015
    Inventor: LI-TAO HSU
  • Patent number: 9150754
    Abstract: A liquid crystal alignment agent includes a polymer composition obtained by subjecting a diamine component and a tetracarboxylic dianhydride component to a reaction, a solvent, and a hydroxyl compound. Preferably, the hydroxyl compound has a weight average molecular weight ranging from 300 to 1,000,000. A liquid crystal alignment film formed from the liquid crystal alignment agent and a liquid crystal display element including the liquid crystal alignment film are also disclosed.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: October 6, 2015
    Assignee: Chi Mei Corporation
    Inventors: Li-Tao Hsu, Yu-Hao Liang, Huai-Pin Hsueh
  • Publication number: 20150232665
    Abstract: The present invention relates to a liquid crystal alignment composition, a liquid crystal alignment film made by the liquid crystal alignment composition and a liquid crystal display device having the liquid crystal alignment film. The liquid crystal alignment composition includes a polymer (A) and a solvent (B). The polymer (A) is synthesized by a mixture that includes a tetracarboxylic dianhydride component (a) and a diamine component (b). The aforementioned liquid crystal alignment composition has a better UV reliability.
    Type: Application
    Filed: February 10, 2015
    Publication date: August 20, 2015
    Inventor: Li-Tao HSU
  • Publication number: 20140163146
    Abstract: The invention relates to a liquid crystal alignment agent comprising a polymer composition (A), a solvent (B), and a poly(oxyalkyleneglycol)dialkylether compound (C); wherein the number average molecular weight of the poly(oxyalkyleneglycol)dialkylether compound (C) is from 250 to 2000. The invention also provides a liquid crystal alignment film made by the liquid crystal alignment agent as mentioned above and a liquid crystal display element comprising the liquid crystal alignment film, and the liquid crystal display element has high voltage holding rate and low ion density.
    Type: Application
    Filed: December 9, 2013
    Publication date: June 12, 2014
    Applicant: CHI MEI CORPORATION
    Inventor: LI-TAO HSU
  • Patent number: 8729178
    Abstract: A polysiloxane-grafted polyimide resin composition includes a polysiloxane-grafted polyimide resin, and a solvent. The polysiloxane-grafted polyimide resin is represented by formula (I): wherein W represents a tetravalent organic group, R represents a trivalent organic group, and X represents a polysiloxane-containing group.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: May 20, 2014
    Assignee: Chi Mei Corporation
    Inventors: Yu-Hao Liang, Li-Tao Hsu, Huai-Pin Hsueh
  • Publication number: 20140024752
    Abstract: A liquid crystal alignment agent includes a polymer composition obtained by subjecting a diamine component and a tetracarboxylic dianhydride component to a reaction, a solvent, and a hydroxyl compound. Preferably, the hydroxyl compound has a weight average molecular weight ranging from 300 to 1,000,000. A liquid crystal alignment film formed from the liquid crystal alignment agent and a liquid crystal display element including the liquid crystal alignment film are also disclosed.
    Type: Application
    Filed: June 18, 2013
    Publication date: January 23, 2014
    Inventors: Li-Tao Hsu, Yu-Hao Liang, Huai-Pin Hsueh
  • Patent number: 8618236
    Abstract: A polysiloxane-grafted polyimide resin composition includes a polysiloxane-grafted polyimide resin, and a solvent. The polysiloxane-grafted polyimide resin is represented by Formula (I): wherein W represents a tetravalent organic group, R represents a trivalent organic group, and X1 and X2 independently represent a polysiloxane-containing group.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: December 31, 2013
    Assignee: Chi Mei Corporation
    Inventors: Yu-Hao Liang, Li-Tao Hsu, Huai-Pin Hsueh