Patents by Inventor Chih-Jen Cheng

Chih-Jen Cheng 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: 9189116
    Abstract: A noise compensating touch panel includes a touch module and a signal compensating module. The touch module includes transmission electrodes and sensing electrodes. The signal compensating module has a first input, a second input and an output. The signal compensating module couples to the touch module. The transmission electrodes receive scanning voltage signals sequentially. When the scanning voltage signals sense the touching by object at crossover points of a first transmission electrode and the sensing electrodes, the sensing electrodes provide sensing signals. The sensing signals include the value of a first parasitical capacitor. The second transmission electrode senses the value of a second parasitical capacitor which the second transmission electrode isn't touched by object when the second transmission electrode receives the scanning voltage signals. Then the second transmission electrode provides compensating signals.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: November 17, 2015
    Assignee: ILI TECHNOLOGY CORP.
    Inventors: Chih-Jen Cheng, Cheng-Chung Hsu
  • Patent number: 9024664
    Abstract: A current-to-voltage converter which is used to receive an input current and to generate an output voltage accordingly comprises a current tracking bias circuit, a current-to-voltage unit, and a voltage clamp bias circuit. The current tracking bias circuit generates a first bias according to the input current. The current-to-voltage unit receives the first bias and the input current, and generates the output voltage according to the input current, wherein the first bias determines a range of the input current, the current-to-voltage unit has a first current control device, and the first current control device changes a current conduction level thereof in response to the first bias, such that a rising or falling speed of the output voltage is enhanced. The voltage clamp bias circuit clamps voltage levels of two ends where the voltage clamp bias circuit is connected to the current-to-voltage unit.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: May 5, 2015
    Assignee: ILI Technology Corp.
    Inventors: Chih-Jen Cheng, Cheng-Chung Hsu
  • Publication number: 20150062092
    Abstract: An exemplary embodiment of the present disclosure illustrates a baseline calibration method for touch panel. Firstly, the baseline calibration method calculates each first differential value associated with each respective transmission electrode through a first-axis calculation procedure. Next, the baseline calibration method calculates each second differential value associated with each respective sensing electrode through a second-axis calculation procedure. Finally, the baseline calibration method calculates a baseline calibration value based on each of the first differential values and each of the respective second differential values calculated.
    Type: Application
    Filed: November 30, 2013
    Publication date: March 5, 2015
    Applicant: ILI TECHNOLOGY CORP.
    Inventors: CHIH-JEN CHENG, CHENG-CHUNG HSU
  • Publication number: 20150029137
    Abstract: A noise compensating touch panel includes a touch module and a signal compensating module. The touch module includes transmission electrodes and sensing electrodes. The signal compensating module has a first input, a second input and an output. The signal compensating module couples to the touch module. The transmission electrodes receive scanning voltage signals sequentially. When the scanning voltage signals sense the touching by object at crossover points of a first transmission electrode and the sensing electrodes, the sensing electrodes provide sensing signals. The sensing signals include the value of a first parasitical capacitor. The second transmission electrode senses the value of a second parasitical capacitor which the second transmission electrode isn't touched by object when the second transmission electrode receives the scanning voltage signals. Then the second transmission electrode provides compensating signals.
    Type: Application
    Filed: November 25, 2013
    Publication date: January 29, 2015
    Applicant: ILI TECHNOLOGY CORP.
    Inventors: CHIH-JEN CHENG, CHENG-CHUNG HSU
  • Publication number: 20140333348
    Abstract: A current-to-voltage converter which is used to receive an input current and to generate an output voltage accordingly comprises a current tracking bias circuit, a current-to-voltage unit, and a voltage clamp bias circuit. The current tracking bias circuit generates a first bias according to the input current. The current-to-voltage unit receives the first bias and the input current, and generates the output voltage according to the input current, wherein the first bias determines a range of the input current, the current-to-voltage unit has a first current control device, and the first current control device changes a current conduction level thereof in response to the first bias, such that a rising or falling speed of the output voltage is enhanced. The voltage clamp bias circuit clamps voltage levels of two ends where the voltage clamp bias circuit is connected to the current-to-voltage unit.
    Type: Application
    Filed: September 5, 2013
    Publication date: November 13, 2014
    Applicant: ILI TECHNOLOGY CORP.
    Inventors: Chih-Jen CHENG, Cheng-Chung HSU
  • Publication number: 20140320172
    Abstract: A current-to-voltage converter comprises a gain circuit, a flip circuit, and a chopper circuit. The gain circuit receives an input current, and amplifies the input current to generate an amplified current. The flip circuit receives the amplified current, and uses the amplified current to charge or discharge a capacitor thereof according to a charge signal and a discharge signal, so as to generate an output voltage, wherein before using the amplified current to charge or discharge the capacitor, the flip circuit resets the output voltage respectively to a charge reset voltage and a discharge reset voltage according to a charge reset signal and a discharge reset signal. When the capacitor is charged, the chopper circuit samples and holds the output voltage to generate a recovered voltage. When the capacitor is discharged, the chopper circuit samples, holds, and flips the output voltage to generate the recovered voltage.
    Type: Application
    Filed: August 22, 2013
    Publication date: October 30, 2014
    Applicant: ILI TECHNOLOGY CORP.
    Inventors: CHENG-CHUNG HSU, CHIH-JEN CHENG
  • Publication number: 20120165887
    Abstract: An implantable closed-loop micro-stimulation device, comprising: a wireless receiver, a wireless energy conversion and storage interface, a demodulator circuit, a modulator, a main controller, a front end sensor, and a stimulation generator. The wireless energy conversion and storage interface receives AC signal through the wireless receiver, and converts it into DC voltage to charge the battery and provide a stable operation voltage. The demodulator circuit receives a wireless control signal through the wireless receiver, and demodulates it into control data and a control clock, and outputs them to the main controller. When the main controller determines that the control data is correct, the main controller outputs the stimulation parameters to the front end sensor and the stimulation generator based on the control data and the control clock, so that the stimulation generator generates a stimulation pulse signal for applying it onto the stimulation object.
    Type: Application
    Filed: February 18, 2011
    Publication date: June 28, 2012
    Inventors: Shuenn-Yuh Lee, Chih-Jen Cheng, Mario Yucheng Su
  • Publication number: 20100149063
    Abstract: A dual-frequency antenna includes a substrate, a ground layer, a plurality of signal feed portions, at least one first radiation portion, a plurality of second radiation portions, a plurality of first signal transmission lines, a plurality of second signal transmission lines, a plurality of first filters, and a plurality of second filters. The signal feed portions are disposed between the first radiation portions and the second radiation portions that are disposed on the first surface of the substrate in a staggered manner. The first signal transmission lines and the second signal transmission lines are respectively used to connect the signal feed portions with the first radiation portions and the second radiation portions. The first filters and the second filters are respectively disposed on the first signal transmission lines and the second signal transmission lines. The dual-frequency antenna is applicable for providing broadband and high gain features.
    Type: Application
    Filed: December 16, 2008
    Publication date: June 17, 2010
    Applicant: SMARTANT TELECOM CO., LTD.
    Inventors: Te-Jung CHAN, Chih-Jen CHENG, Jun-Zhi CHEN
  • Publication number: 20100123637
    Abstract: An antenna includes a substrate, a signal feed portion, and a plurality of radiation units. The substrate has a first surface and a second surface. The signal feed portion is located on the substrate. The plurality of radiation units is located on the substrate, connected to the signal feed portion, and arranged in a radial shape. Each of the radiation units includes a radiation portion and a ground portion. The radiation portion is located on the first surface with one end connected to the signal feed portion. The ground portion is located on the second surface in symmetry with the radiation portion, with one end connected to the signal feed portion. A plurality of dipole antennas connected in parallel to the signal feed portion, so as to avoid a zero point generated on the single dipole antenna, such that a wave width of the antenna radiation has a large angle.
    Type: Application
    Filed: November 14, 2008
    Publication date: May 20, 2010
    Applicant: SMARTANT TELECOM CO., LTD.
    Inventors: Chih-Jen CHENG, Sheng-Mou HUANG
  • Publication number: 20100060526
    Abstract: An omnidirectional antenna includes a substrate, a signal feed-in portion, a first radiation unit, and a second radiation unit. The first radiation unit is located on a first surface of the substrate, and electrically connected to a first circuit of the first surface. The first radiation unit has a first extension end and a second extension end. The second radiation unit is located on a second surface of the substrate, and electrically connected to a second circuit of the second surface. The second radiation unit has a third extension end and a fourth extension end. The first extension end is disposed corresponding to the third extension end, and the second extension end is disposed corresponding to the fourth extension end. The signal feed-in portion is located on the first circuit and the second circuit. Thus, the impedance is improved, a wider bandwidth is achieved, and the process is simplified.
    Type: Application
    Filed: September 5, 2008
    Publication date: March 11, 2010
    Applicant: SMARTANT TELECOM CO., LTD.
    Inventor: Chih-Jen CHENG
  • Publication number: 20030148664
    Abstract: A connection port structure of CF card provides a primary port for CF socket capable of connecting with the application devices such as PDA or digital camera and so on, in which it is characterized by extending from the primary port to form a secondary port locating at the opposite end of the primary port or at one side of the CF card. The secondary port can be a type of socket or a type of pin.
    Type: Application
    Filed: February 6, 2002
    Publication date: August 7, 2003
    Inventor: Chih-Jen Cheng
  • Patent number: 4854007
    Abstract: The present disclosure relates to a dust-proof caster assembly including a caster having a peripheral annular recess disposed thereon and a casing having a corresponding annular peripheral flange which can be fitly engaged with the annular recess when the caster and the casing are assembled together, thus effectively preventing dust or fragmental threads in a textile factory from getting into the fissure between the wheel hub and the bearing, improving the operation of the caster and enhancing the longevity thereof.
    Type: Grant
    Filed: July 19, 1988
    Date of Patent: August 8, 1989
    Inventor: Chih-Jen Cheng