Patents by Inventor Cheng-Hao Chang

Cheng-Hao Chang 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).

  • Publication number: 20140175383
    Abstract: The present invention discloses a new indenotriphenylene derivatives and organic light emitting device using the derivatives. The organic light emitting device employing new indenotriphenylene derivatives as host material can lower driving voltage, prolong half-lifetime, increasing efficiency. The new indenotriphenylene derivatives are represented by the following formula (A): Wherein A1, A2 are substituted or unsubstituted fused ring hydrocarbon units with one to five rings. Preferably A1, A2 are phenyl group, naphthyl group, anthracenyl group, pyrenyl group, chrysenyl group, perylenyl group. R1 to R4 are identical or different. R1 to R4 are independently selected from the group consisting of a hydrogen atom, a halide, alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 6 to 30 carbon atoms.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 26, 2014
    Applicant: LUMINESCENCE TECHNOLOGY CORPORATION
    Inventors: Feng-Wen Yen, Cheng-Hao Chang, Hsu-Kai Chang, Feng-Ying Wang
  • Publication number: 20140151645
    Abstract: The present invention discloses a new fluorene compound and organic EL device using the compound. The organic EL device employing the new fluorene compound as host material can lower driving voltage, prolong half-lifetime. The fluorene compound can functions as blue emitting host material of a light emitting layer and improve CIE colour purity in blue emitting device. The fluorene compound are represented by the following formula(A): Wherein R1 to R6 are identical or different. R1 to R6 are independently selected from the group consisting of a hydrogen atom, a halide, alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 6 to 30 carbon atoms. R7˜R13 are identical or different R7 to R13 are independently selected from the group consisting of hydrogen atom, halide, alkyl group, aryl group, heteroaryl group.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Inventors: FENG-WEN YEN, CHENG-HAO CHANG, HSU-KAI CHANG, FENG-YING WANG
  • Publication number: 20140131664
    Abstract: The present invention discloses a new indenotriphenylene derivatives and organic light emitting device using the derivatives. The organic light emitting device employing new indenotriphenylene derivatives as host material can lower driving voltage, prolong half-lifetime, increasing efficiency. The new indenotriphenylene derivatives are represented by the following formula (A): Wherein A1, A2 are substituted or unsubstituted fused ring hydrocarbon units with one to five rings. Preferably A1, A2 are phenyl group, naphthyl group, anthracenyl group, pyrenyl group, chrysenyl group. Perylenyl group. R1 to R4 are identical or different. R1 to R4 are independently selected from the group consisting of a hydrogen atom, a halide, alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 6 to 30 carbon atoms.
    Type: Application
    Filed: November 12, 2012
    Publication date: May 15, 2014
    Applicant: LUMINESCENCE TECHNOLOGY CORPORATION
    Inventors: FENG-WEN YEN, CHENG-HAO CHANG, HSU-KAI CHANG, FENG-YING WANG
  • Publication number: 20130180589
    Abstract: The present invention relates to organic photovoltaic cell materials and components and particularly, to the organic photovoltaic cell materials and the components with high optical conversion efficiency, simple preparation process and low cost. The chemical formula of the materials is represented by chemical formula (I): where n is a natural number and X is the following chemical formula (II): where m is 1˜3 and A is hydrogen, fluorine, chlorine, C1˜C18-alkyl, thienyl, phenyl or pyridyl in which thienyl, phenyl or pyridyl may be substituted with C1˜C18-alkyl in any position.
    Type: Application
    Filed: April 3, 2012
    Publication date: July 18, 2013
    Applicant: LUMINESCENCE TECHNOLOGY CORPORATION
    Inventors: Feng-Wen YEN, Cheng-Hao CHANG, Chin-Min TENG
  • Publication number: 20100056394
    Abstract: The present invention discloses a bio-reaction module, the so called mini bio-reactor, for providing a stable environment for the hybridization or immuno-reaction on biochips with constant temperature and humidity. Moreover, the mini bio-reactor can be a tool for studying the bio-reaction mechanism. Any variations in bio-reaction mechanism and environmental factors may affect experiment outcomes. Hence, when bulky equipment is miniaturized into a module system, the researchers can utilize a mini bio-reactor to perform bio-experiments or reactors in series connection to perform batch experiments. The structure design of mini reactor is able to promote better reaction efficiency and to shorten reaction time for a variety of bio experiments. Hence what is developed is an automatic, handy and inexpensive device for bio researches with high sensitivity and reliability.
    Type: Application
    Filed: September 4, 2008
    Publication date: March 4, 2010
    Applicant: CHUNG YUAN CHRISTIAN UNIVERSITY
    Inventors: Yaw-Jen Chang, Cheng-Hao Chang
  • Publication number: 20100048420
    Abstract: The present invention discloses a biochip and the forming method thereof. The disclosed biochip comprises a substrate and a divalent metal compound layer on the substrate. The method for forming a biochip comprises two major steps. The first step is providing a substrate, and the second step is forming a divalent metal compound layer on the substrate.
    Type: Application
    Filed: August 22, 2008
    Publication date: February 25, 2010
    Applicant: CHUNG YUAN CHRISTIAN UNIVERSITY
    Inventors: Yaw-Jen Chang, Cheng-Hao Chang, Chih-Yu Hu
  • Publication number: 20080192466
    Abstract: A reflective light guiding mechanism (10) for illuminating a keypad assembly of a portable electronic device is provided. The reflective light guiding mechanism includes a light guiding plate (12), a reflective layer (14), and a plurality of light sources (16). The reflective layer is formed on a surface of the light guiding plate. The reflective layer is made of aluminum, aluminized polyester or their combination. The plurality of light sources is structured and arranged on the reflective layer.
    Type: Application
    Filed: September 5, 2007
    Publication date: August 14, 2008
    Applicant: CHI MEI COMMUNICATION SYSTEMS, INC.
    Inventor: CHENG-HAO CHANG
  • Publication number: 20070161822
    Abstract: The present invention discloses an oligofluorene-based compound, wherein the general formula of the oligofluorene-based compound is as following: , wherein n is an integer of 0 to 3, A is polyaryl moiety or amino group, and B is amino group or hydrogen. Furthermore, the mentioned oligofluorene-based compound can be used as electro-luminescent materials or host-guest materials.
    Type: Application
    Filed: January 10, 2006
    Publication date: July 12, 2007
    Inventors: Feng-Wen Yen, Chao-Yu Chiu, Cheng-Hao Chang, I-Feng Lin, Pei-Chi Yen
  • Publication number: 20070077450
    Abstract: The present invention discloses conjugated compounds containing triarylamine structural elements with a general formula ABm, wherein A is aryl moiety with or without hetero atom(s), m is integers from 2 to 4, and B is as following: wherein Ar is aryl moiety. Moreover, the conjugated compounds of the invention are used as hole transport material, hole injection material and/or as host material in organic electroluminescence devices and/or phosphorescence devices, and as hole transport material in solar cells.
    Type: Application
    Filed: October 4, 2005
    Publication date: April 5, 2007
    Inventors: Feng-wen Yen, Chao-Yu Chiu, Cheng-Hao Chang, Chin-Ming Teng, Feng-Ying Wang, Yung-Fan Cheng