Patents by Inventor Ching-Tung Tseng

Ching-Tung Tseng 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).

  • LIGHT-EMITTING ELEMENT
    Publication number: 20150123152
    Abstract: A light-emitting element includes a light-emitting stacked layer including an upper surface, wherein the upper surface includes a first flat region; a protective layer including a current blocking region on the first flat region; and a cap region on the upper surface, wherein the current blocking region is spatially separate from the cap region; and a first electrode covering the current blocking region.
    Type: Application
    Filed: November 5, 2014
    Publication date: May 7, 2015
    Inventors: CHI-NAN LIN, CHIEN-FU SHEN, YU-CHEN YANG, Ching-Tung Tseng, Cheng-Hsiang Ho, Chun-Wei Chang, Chen Ou
  • Error-correction apparatus for step-motor transmission system and a method for the same
    Patent number: 6967460
    Abstract: An error-correction method and apparatus are used for a step motor transmission system. The step motor has a plurality of inductor coils therein for rotating an internal shaft thereof. A rotational error gamma table is established by measuring an error value for each rotational step of the step motor. The error-correction apparatus receives an external digital displacement signal for producing a rotational step signal. A compensation current is produced according to the rotational step signal and an error value in the rotational error gamma table. The inductor coils are driven by the compensation current to rotate the internal shaft precisely.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: November 22, 2005
    Assignee: Service & Quality Technology Co., Ltd.
    Inventor: Ching-Tung Tseng