Patents by Inventor Cheng-Lu Liu

Cheng-Lu Liu 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: 10180737
    Abstract: A thin electromagnetic handwriting pen includes a casing unit, a circuit unit, an electromagnetic unit and a pen core unit. The casing unit includes a thin pen-shaped casing structure. The circuit unit includes a circuit substrate disposed inside the thin pen-shaped casing structure. The electromagnetic unit includes a hollow holder and an electromagnetic coil wound around the hollow holder. Both the hollow holder and the electromagnetic coil are embedded in the thin pen-shaped casing structure, and the electromagnetic coil is fixed between the thin pen-shaped casing structure and the hollow holder and electrically connected to the circuit substrate. The pen core unit includes a pen core structure movably disposed inside the thin pen-shaped casing structure and passing through the hollow holder, and one portion of the pen core structure is exposed outside the thin pen-shaped casing structure.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: January 15, 2019
    Assignee: Wacom Co., Ltd.
    Inventors: Chien-Chia Lien, Hung-I Wang, Cheng-Lu Liu
  • Publication number: 20170038858
    Abstract: A thin electromagnetic handwriting pen includes a casing unit, a circuit unit, an electromagnetic unit and a pen core unit. The casing unit includes a thin pen-shaped casing structure. The circuit unit includes a circuit substrate disposed inside the thin pen-shaped casing structure. The electromagnetic unit includes a hollow holder and an electromagnetic coil wound around the hollow holder. Both the hollow holder and the electromagnetic coil are embedded in the thin pen-shaped casing structure, and the electromagnetic coil is fixed between the thin pen-shaped casing structure and the hollow holder and electrically connected to the circuit substrate. The pen core unit includes a pen core structure movably disposed inside the thin pen-shaped casing structure and passing through the hollow holder, and one portion of the pen core structure is exposed outside the thin pen-shaped casing structure.
    Type: Application
    Filed: October 21, 2016
    Publication date: February 9, 2017
    Inventors: CHIEN-CHIA LIEN, HUNG-I WANG, CHENG-LU LIU
  • Patent number: 9535513
    Abstract: A thin electromagnetic handwriting pen includes a casing unit, a circuit unit, an electromagnetic unit and a pen core unit. The casing unit includes a thin pen-shaped casing structure. The circuit unit includes a circuit substrate disposed inside the thin pen-shaped casing structure. The electromagnetic unit includes a hollow holder and an electromagnetic coil wound around the hollow holder. Both the hollow holder and the electromagnetic coil are embedded in the thin pen-shaped casing structure, and the electromagnetic coil is fixed between the thin pen-shaped casing structure and the hollow holder and electrically connected to the circuit substrate. The pen core unit includes a pen core structure movably disposed inside the thin pen-shaped casing structure and passing through the hollow holder, and one portion of the pen core structure is exposed outside the thin pen-shaped casing structure.
    Type: Grant
    Filed: May 18, 2014
    Date of Patent: January 3, 2017
    Assignee: Wacom Co., Ltd.
    Inventors: Chien-Chia Lien, Hung-I Wang, Cheng-Lu Liu
  • Publication number: 20150212606
    Abstract: A thin electromagnetic handwriting pen includes a casing unit, a circuit unit, an electromagnetic unit and a pen core unit. The casing unit includes a thin pen-shaped casing structure. The circuit unit includes a circuit substrate disposed inside the thin pen-shaped casing structure. The electromagnetic unit includes a hollow holder and an electromagnetic coil wound around the hollow holder. Both the hollow holder and the electromagnetic coil are embedded in the thin pen-shaped casing structure, and the electromagnetic coil is fixed between the thin pen-shaped casing structure and the hollow holder and electrically connected to the circuit substrate. The pen core unit includes a pen core structure movably disposed inside the thin pen-shaped casing structure and passing through the hollow holder, and one portion of the pen core structure is exposed outside the thin pen-shaped casing structure.
    Type: Application
    Filed: May 18, 2014
    Publication date: July 30, 2015
    Inventors: CHIEN-CHIA LIEN, HUNG-I WANG, CHENG-LU LIU
  • Patent number: 8692814
    Abstract: An electromagnetic pointer is disclosed. The electromagnetic pointer comprises a pen holder assembly, a circuit board, a metal rod, a ferrite core with coils and a trigger device. The diameter of the pen holder assembly is less than 6 mm. The circuit board comprises a resonance circuit. The metal rod has a low permeability. The ferrite core with coil constitutes an inductor and the coil electrically connects to the circuit board through a conductive wire to complete the resonance circuit. The ferrite core has a hollow center so that the metal rod can move through to trigger the trigger device and change electric properties of the resonance circuit.
    Type: Grant
    Filed: July 7, 2010
    Date of Patent: April 8, 2014
    Assignee: Waltop International Corporation
    Inventors: Chien-Chia Lien, Cheng-Lu Liu
  • Patent number: 8184055
    Abstract: An electromagnetic input LCD monitor is disclosed in this invention. The electromagnetic input LCD monitor includes a back frame and a film antenna module. The back frame has at least one opening. The film antenna module includes a film antenna plate and a signal receiving module. The film antenna plate is disposed on a surface of the back frame; the signal receiving module is disposed on the other surface of the back frame. The film antenna plate has a wiring portion which is connected with the signal receiving module through the opening.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: May 22, 2012
    Assignee: Waltop International Corporation
    Inventors: Cheng-Lu Liu, Pei-Wei Lin, Sheng-Mao Lin
  • Publication number: 20120112766
    Abstract: An electromagnetic induction coordinate detecting method for detecting the trace of at least one electromagnetic pointing device on an electromagnetic sensor board is disclosed. The method includes the following steps: first, a delayed period for each electromagnetic pointing device is pre-determined. Then, whether a board-trigger signal from the electromagnetic sensor board is received is determined. If yes, the electromagnetic pointing device emits an electromagnetic signal after the delayed period. Finally, the electromagnetic sensor board calculates the coordinate and the pressure of each electromagnetic pointing device according to the received electromagnetic signal.
    Type: Application
    Filed: June 17, 2011
    Publication date: May 10, 2012
    Applicant: WALTOP INTERNATIONAL CORPORATION
    Inventors: CHUNG-WEN HSU, CHENG-LU LIU
  • Publication number: 20110175854
    Abstract: An electromagnetic pointer is disclosed. The electromagnetic pointer comprises a pen holder assembly, a circuit board, a metal rod, a ferrite core with coils and a trigger device. The diameter of the pen holder assembly is less than 6 mm. The circuit board comprises a resonance circuit. The metal rod has a low permeability. The ferrite core with coil constitutes an inductor and the coil electrically connects to the circuit board through a conductive wire to complete the resonance circuit. The ferrite core has a hollow center so that the metal rod can move through to trigger the trigger device and change electric properties of the resonance circuit.
    Type: Application
    Filed: July 7, 2010
    Publication date: July 21, 2011
    Applicant: WALTOP INTERNATIONAL CORPORATION
    Inventors: Chien-Chia LIEN, Cheng-Lu Liu
  • Publication number: 20110090171
    Abstract: The present invention relates to an integrated substrate and display with electromagnetic sensor loop, and particularly relates to a TFT/CF array substrate and flat display with electromagnetic sensor loop. In the present invention, electromagnetic sensor loop is formed on one substrate of a display panel for getting the integrated substrate with electromagnetic sensor loop. The integrated substrate with antenna loop has both a function of a detecting board and a function of one substrate of the display panel, for example a function of a TFT/CF array substrate.
    Type: Application
    Filed: April 26, 2010
    Publication date: April 21, 2011
    Applicant: WALTOP INTERNATIONAL CORPORATION
    Inventors: Wei-Chou Chen, Yun-Hsiang Yeh, Cheng-Lu Liu
  • Publication number: 20110084846
    Abstract: An electromagnetic whiteboard pen is disclosed, and particular an electromagnetic whiteboard pen capable of inking and digital inputting simultaneously is disclosed. The electromagnetic whiteboard pen has a marker for writing with ink and a coil for emitting electromagnetic signals. When user writes on an electromagnetic whiteboard by the marker, the coil emitting electromagnetic signals simultaneously. The electromagnetic whiteboard senses the electromagnetic signals to find and record the position and the moving of the electromagnetic whiteboard pen. Therefore, the writing on the electromagnetic whiteboard by inking can be record and converted to be digital signals for storing by the electromagnetic whiteboard when the electromagnetic whiteboard pen writes on the electromagnetic whiteboard.
    Type: Application
    Filed: November 12, 2009
    Publication date: April 14, 2011
    Applicant: WALTOP INTERNATIONAL CORPORATION
    Inventors: Chih-Jen Li, Yan-Chin Hsu, Cheng-Lu Liu
  • Publication number: 20110084942
    Abstract: Data processing method and system with multiple input units are disclosed. The method comprises the following steps. First of all, a plurality of antenna boards which are partially overlapped and form an integration antenna board with multiple regions are provided. Then signals from the antenna boards are processed through signal processing units corresponding to the antenna boards, and the processed signals are transmitted to an integration processing unit. Finally, the processed signals are integrated and processed via the integration processing unit and integrated signals of the integration antenna board are outputted.
    Type: Application
    Filed: November 26, 2009
    Publication date: April 14, 2011
    Applicant: WALTOP INTERNATIONAL CORPORATION
    Inventors: Cheng-Lu Liu, Yun-Hsiang Yeh
  • Publication number: 20110083912
    Abstract: An electromagnetic whiteboard eraser is disclosed, and particular an electromagnetic whiteboard eraser capable of erasing both of the writing written by ink and the writing inputted by electromagnetic induction simultaneously. The electromagnetic whiteboard eraser has an ink eraser for erasing the writing written by ink and a coil for emitting electromagnetic signals. An electromagnetic whiteboard defines an erasing area for erasing the writing inputted by electromagnetic induction by defining the position of the coil to be the center of the erasing area and defining the diameter or radius of the ink eraser to be the diameter or radius of the erasing area after the electromagnetic whiteboard induces the electromagnetic signals emitted by the coil. The coil is deposed on the place corresponding to the center of the ink eraser.
    Type: Application
    Filed: December 16, 2009
    Publication date: April 14, 2011
    Applicant: WALTOP INTERNATIONAL CORPORATION
    Inventors: Jen-Shuo Liu, Cheng-Lu Liu, Yan-Chin Hsu
  • Publication number: 20110036648
    Abstract: A notebook mountable hand writing memory system is disclosed, and particular disclosed a notebook mountable tablet. In the notebook mountable hand writing memory system, a top protective layer, a sensing board and a bottom protective layer is assembled to form the writing member of the notebook mountable hand writing memory system for reducing the weight and the thickness of the notebook mountable hand writing memory system. Therefore, the notebook mountable hand writing memory system has the characteristics of low fabricating cost, low weight, and thinner thickness. Furthermore, a plurality of through holes are provided on the writing member for integrating the notebook mountable hand writing memory system with a conventional notebook. Therefore, the information written on the paper of the conventional notebook can be digitized and stored by the notebook mountable hand writing memory system.
    Type: Application
    Filed: January 27, 2010
    Publication date: February 17, 2011
    Applicant: WALTOP INTERNATIONAL CORPORATION
    Inventors: Wei-Chou Chen, Cheng-Lu Liu, Yun-Hsiang Yeh
  • Publication number: 20110007001
    Abstract: An embodiment of the present invention discloses an input device, which comprises an electromagnetic input unit for inputting by a stylus pen, a touch input unit for inputting by fingers or pen, a first micro controller for controlling the electromagnetic input unit, a second micro controller for controlling the touch input unit, and a major controller for controlling the first and second micro controller.
    Type: Application
    Filed: October 9, 2009
    Publication date: January 13, 2011
    Applicant: WALTOP INTERNATIONAL CORPORATION
    Inventor: Cheng-Lu Liu
  • Publication number: 20110007024
    Abstract: The present invention relates to a whiteboard and method for orientation thereof, and particularly relates to an electromagnetic-and-interactive whiteboard with a battery-free pointer device and method of the electromagnetic-and-interactive whiteboard for finding the position of the battery-free pointer device. A plurality of signal handling devices are provided in the whiteboard for controlling the antenna boards of the whiteboard to emit electromagnetic power respectively. By this way, the antenna boards do not interfered with each other and the battery-free pointer device can be located precisely without deviation. Furthermore, the electromagnetic power provided by the antenna boards is applied to instead of a battery in battery-free pointer device for providing the power to the battery-free pointer device. The electromagnetic power provided by the antenna boards is used to be the power of the battery-free pointer device for emitting electromagnetic signals.
    Type: Application
    Filed: November 12, 2009
    Publication date: January 13, 2011
    Applicant: WALTOP INTERNATIONAL CORPORATION
    Inventors: Cheng-Lu Liu, Yun-Hsiang Yeh, Sheng-Mao Lin
  • Publication number: 20100271345
    Abstract: The present invention relates to an electronic white board capable of printing partial data thereon, and particularly relates to a non-interactive white board capable of printing partial data thereon. The electronic white board comprises a writing area for inputting the data to the electronic white board by writing, a selecting device for selecting the part of the data on the writing area to be printed, and a defining device for defining which part on the writing area is selected by the selecting device. In the present invention, the defining device defines a rectangle zone, a circle zone, an elliptical zone or a polygonal zone on the writing area for printing by inputting one or more points or lines with the selecting device.
    Type: Application
    Filed: August 11, 2009
    Publication date: October 28, 2010
    Applicant: WALTOP INTERNATIONAL CORPORATION
    Inventors: Cheng-Lu Liu, Yun-Hsiang Yeh, Yi-Ting Chen
  • Publication number: 20100238073
    Abstract: An electromagnetic input LCD monitor is disclosed in this invention. The electromagnetic input LCD monitor includes a back frame and a film antenna module. The back frame has at least one opening. The film antenna module includes a film antenna plate and a signal receiving module. The film antenna plate is disposed on a surface of the back frame; the signal receiving module is disposed on the other surface of the back frame. The film antenna plate has a wiring portion which is connected with the signal receiving module through the opening.
    Type: Application
    Filed: October 5, 2009
    Publication date: September 23, 2010
    Applicant: WALTOP INTERNATIONAL CORPORATION
    Inventors: Cheng-Lu Liu, Pei-Wei Lin, Sheng-Mao Lin