Patents by Inventor Nai-Heng Chang

Nai-Heng 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).

  • Patent number: 8531365
    Abstract: A liquid crystal display device includes a plurality of pixel units. Each of the pixel units includes a first thin film transistor and a second thin film transistor, a reflective sheet, and a storage capacitor. The channel width/length ratio of the first thin film transistor and the channel width/length ratio of the second thin film transistor are both larger than 12/5. The reflective sheet is disposed adjacent to the first thin film transistor and the second thin film transistor to reflect ambient light. The storage capacitor is formed at a position overlapping the reflective sheet and has a capacitance of larger than 1 pF.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: September 10, 2013
    Assignee: Wintek Corporation
    Inventors: Chih-Chang Lai, Nai Heng Chang, Wen-Chun Wang, Po-Hsien Wang, Jyun-Sian Li, Ching-Fu Hsu, Wei-Jian Chang
  • Patent number: 8106324
    Abstract: A touch panel including a first substrate, a second substrate, a first conductive layer, a second conductive layer, a third conductive layer, and a number of spacers is provided. The first substrate has an upper surface and a bottom surface opposite to the upper surface. The second substrate is parallel to the first substrate. The first conductive layer is disposed on the upper surface of the first substrate, while the second conductive layer is disposed on the bottom surface of the first substrate. The third conductive layer is disposed on the second substrate and interposed between the second substrate and the second conductive layer. The spacers are interposed between the second conductive layer and the third conductive layer. The touch panel has functions of multi-touch, contact-touch and non-contact touch, and the touch panel can be operated by conductive objects or dielectric objects.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: January 31, 2012
    Assignee: Wintek Corporation
    Inventors: Chih-Chang Lai, Nai-Heng Chang
  • Publication number: 20110102344
    Abstract: A portable electronic device including a main body and a wireless input unit is provided. The main body has a display surface and an accommodating portion opposite the display surface. The accommodating portion defines an accommodating space substantially parallel to the display surface. The wireless input unit is placed inside the accommodating space and capable of being extracted from the accommodating space. The wireless input unit is separate from the main body. The wireless input unit includes a touch panel, a pattern layer, and a control circuit. The touch panel has an operation surface and a back surface opposite the operation surface. The pattern layer is disposed on the back surface of the touch panel and has a plurality of control area patterns. The control circuit is disposed on the touch panel.
    Type: Application
    Filed: October 28, 2010
    Publication date: May 5, 2011
    Inventors: Nai Heng Chang, Cheng-Chieh Liu, Chih-Chang Lai
  • Publication number: 20100259700
    Abstract: A liquid crystal display device includes a plurality of pixel units. Each of the pixel units includes a first thin film transistor and a second thin film transistor, a reflective sheet, and a storage capacitor. The channel width/length ratio of the first thin film transistor and the channel width/length ratio of the second thin film transistor are both larger than 12/5. The reflective sheet is disposed adjacent to the first thin film transistor and the second thin film transistor to reflect ambient light. The storage capacitor is formed at a position overlapping the reflective sheet and has a capacitance of lager than 1 pF.
    Type: Application
    Filed: April 8, 2010
    Publication date: October 14, 2010
    Inventors: Chih-Chang LAI, Nai Heng CHANG, Wen-Chun WANG, Po-Hsien WANG, Jyun-Sian LI, Ching-Fu HSU, Wei-Jian CHANG
  • Publication number: 20090211891
    Abstract: A touch panel including a first substrate, a second substrate, a first conductive layer, a second conductive layer, a third conductive layer, and a number of spacers is provided. The first substrate has an upper surface and a bottom surface opposite to the upper surface. The second substrate is parallel to the first substrate. The first conductive layer is disposed on the upper surface of the first substrate, while the second conductive layer is disposed on the bottom surface of the first substrate. The third conductive layer is disposed on the second substrate and interposed between the second substrate and the second conductive layer. The spacers are interposed between the second conductive layer and the third conductive layer. The touch panel has functions of multi-touch, contact-touch and non-contact touch, and the touch panel can be operated by conductive objects or dielectric objects.
    Type: Application
    Filed: February 19, 2009
    Publication date: August 27, 2009
    Applicant: WINTEK CORPORATION
    Inventors: Chih-Chang Lai, Nai-Heng Chang
  • Publication number: 20080165301
    Abstract: A liquid crystal display panel with electrostatic discharge protection capability has an array substrate having an active area, a driver IC, a Vcom wire and an electrostatic reduction element formed on. The driver IC is formed beside the active area. The Vcom wire is formed around the active area and is connected with the electrostatic reduction element to the driver IC. When an electrostatic discharge current flows on the Vcom wire to the driver IC, the electrostatic reduction element mitigates or obviates damage to the driver IC.
    Type: Application
    Filed: January 7, 2008
    Publication date: July 10, 2008
    Applicant: WINTEK CORPORATION
    Inventors: Nai-Heng CHANG, Chih-Ming CHEN, Lin LIN, Chih-Chang LAI, Wen-Chun WANG, Shyh-Jeng CHEN, Chun Chieh WU, Chi-Ming HSIEH