Patents by Inventor Cheng-chung Shih
Cheng-chung Shih 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).
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Publication number: 20110016166Abstract: A numeric decision device for determining a numeric of a specific order in a plurality of numerics includes a plurality of reception ends, a plurality of multiplexer modules each for outputting a numeric received by a reception end or a default value, a comparison module for comparing output signals of the plurality of multiplexer modules to generate a plurality of comparison results and for determining an extreme value, a decoding module for generating a plurality of decoding results according to the plurality of comparison result, a driving module for controlling the plurality of multiplexer modules, the comparison module and the decoding module to operate a default time corresponding to the specific order, and an output unit for outputting the extreme value after the comparison module operates for the default time to determine the numeric of the specific order.Type: ApplicationFiled: October 28, 2009Publication date: January 20, 2011Inventor: Cheng-Chung Shih
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Publication number: 20100277711Abstract: The present invention discloses an optical quantized distance measuring apparatus and a method thereof. The optical distance quantized measuring apparatus comprises an illuminating module, a sensing component array and a processing module. The illuminating module projects a light source onto an object to generate a reflecting light. The sensing component array receives the reflecting light, which generates a light source location on the sensing component array. The processing module determines the light source location, and determines an interval between the object and the sensing component array according to the light source location. The processing module determines the light source location with the binary search algorithm.Type: ApplicationFiled: May 4, 2009Publication date: November 4, 2010Applicant: CAPELLA MICROSYSTEMS, CORP.Inventors: Cheng-Chung Shih, Yuh-Min Lin
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Publication number: 20100097009Abstract: A light emitting apparatus comprises a light emitting element and a switching converter comprising a conversion circuit for converting an operating electric signal to generate the driving electric signal, a feedback circuit having a light detecting element for detecting a luminous intensity of the light emitting element and generating a feedback signal, and a control circuit for receiving the feedback signal, comparing the received feedback signal with a reference electric signal, and controlling the conversion circuit based on comparison results to adjust the driving electric signal. Alternatively, the light detecting element detects ambient light and the control circuit controls the conversion circuit based on comparison results to stop or enable outputting of the driving electric signal.Type: ApplicationFiled: October 16, 2008Publication date: April 22, 2010Applicant: CAPELLA MICROSYSTEMS, CORP.Inventors: Yuh-Min Lin, Cheng-Chung Shih
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Publication number: 20100040377Abstract: A optical sensing module based on signals having pulse width modulation and a method thereof are disclosed for sensing a light source and providing an output signal having pulse width modulation. The optical sensing module comprises an optical sensor, a signal processing unit, and a duty cycle modulation unit. The signal processing unit provides a modulation control signal based on a sensing signal generated by sensing the light source from the optical sensor in conjunction with a gain control signal. The duty cycle modulation unit modulates the duty cycle of the pulse width modulation input signal to generate the pulse width modulation output signal based on the modulation control signal. The duty cycle difference between the duty cycle of the input signal and the duty cycle of the output signal is proportional to the intensity difference between the light source and a reference light source.Type: ApplicationFiled: August 15, 2008Publication date: February 18, 2010Applicant: CAPELLA MICROSYSTEMS(Taiwan),LtdInventors: Jinn-Ann Kuo, Cheng-Chung Shih, Yuh-Min Lin, Chih-Cheng Chien, Chien-Min Hsieh
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Patent number: 7649399Abstract: A signal generating and switching apparatus and a method thereof are provided. According to a simple layout technique, the signal switching apparatus is formed in each layer of a plurality of metal layers in an integrated circuit. When there is a need to correct any one of the plurality of conductive layers in the integrated circuit, the changing of the signal switching apparatus in that conductive layer can be achieved by changing mask patterns of the conductive layer. As a result, the transmission path of signals in the conductive layer is changed, and the purpose to change output logic signals is achieved. Therefore, there is no need to change additional conductive layers, thereby significantly reducing the correcting cost of the integrated circuit.Type: GrantFiled: May 23, 2007Date of Patent: January 19, 2010Assignee: Novatek Microelectronics Corp.Inventors: Chang-Tien Tsai, Cheng-Chung Shih, Shih-Pin Hsu
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Patent number: 7595786Abstract: This invention discloses an illumination method and an illumination control method. An embodiment of the illumination system includes two light detection modules for detecting a light produced by a light emitting diode and an ambient light, calculating a reference spectral distribution based on a detection result of the ambient light, comparing the detection result of the light emitting diode with the reference spectral distribution, and driving the illumination module to emit a light matching with the reference spectral distribution based on a comparison result. Another embodiment of the illumination system includes a light detection module for periodically switching the light emitting diode to emit light and stop emitting light. When the light emitting diode stops an illumination period, the light detection module detects an ambient light, and when the light emitting diode continues an illumination period, the light detection module detects a light produced by the light emitting diode.Type: GrantFiled: November 13, 2007Date of Patent: September 29, 2009Assignee: Capella Microsystems, Corp.Inventor: Cheng-Chung Shih
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Publication number: 20090237423Abstract: This invention discloses a display apparatus capable of adjusting gamma and brightness based on ambient light and its display adjustment method. The display apparatus is adjusted to display an image output signal based on an image input signal and the correlated color temperature and brightness of an ambient light. The display apparatus includes a plurality of light sensing circuits, a memory unit, an image processing module, and a display module. The light sensing circuit senses the ambient light to produce a digital ambient color temperature index value. The memory unit stores a lookup table of brightness expression rates and gamma adjustment parameters corresponding to different color temperature index values. The image processing module produces a gamma adjustment parameter by a lookup table based on the color temperature index value and generates the gamma expression rate of the image input signal.Type: ApplicationFiled: March 20, 2008Publication date: September 24, 2009Inventors: Cheng-Chung Shih, Koon Wing Tsang
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Publication number: 20090121641Abstract: This invention discloses an illumination method and an illumination control method. An embodiment of the illumination system includes two light detection modules for detecting a light produced by a light emitting diode and an ambient light, calculating a reference spectral distribution based on a detection result of the ambient light, comparing the detection result of the light emitting diode with the reference spectral distribution, and driving the illumination module to emit a light matching with the reference spectral distribution based on a comparison result. Another embodiment of the illumination system includes a light detection module for periodically switching the light emitting diode to emit light and stop emitting light. When the light emitting diode stops an illumination period, the light detection module detects an ambient light, and when the light emitting diode continues an illumination period, the light detection module detects a light produced by the light emitting diode.Type: ApplicationFiled: November 13, 2007Publication date: May 14, 2009Inventor: Cheng-Chung Shih
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Publication number: 20090079714Abstract: An apparatus for improving display quality of dynamic image on liquid crystal display (LCD) and a method thereof are provided. The apparatus includes an image data processing unit and an overdrive correcting unit. The overdrive correcting unit is coupled to the image data processing unit. The image data processing unit receives the image data and performs image processing. Then the image data processing unit stores the image data of previous frame after image processing. The overdrive correcting unit receives the image data of previous frame and current frame from the image data processing unit, and generates overdrive image data corresponding to the image data according to the image data of the previous frame and the image data of the current frame.Type: ApplicationFiled: January 22, 2008Publication date: March 26, 2009Applicant: NOVATEK MICROELECTRONICS CORP.Inventors: Cheng-Chung Shih, Liang-Kuei Hsu, Tsun-Tu Wang
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Publication number: 20090020684Abstract: The present invention discloses an illumination apparatus and an optical radiation control method. The illumination apparatus includes at least one light emitting module, an optical detector, a temperature calculating module and a control module. These emitting modules are for producing a light beam and the control module is for generating a PWM signal to drive the emitting modules. The optical detector electrically connected to the control module is for detecting the optical radiation of light emitted from the light modules. The temperature calculating module is for calculating the temperature of the illumination apparatus based on the PWM signal and a predetermined PWM width. The control module can adjust the optical radiation of light emitted from the light modules based on the temperature and the detected data of the optical detector.Type: ApplicationFiled: July 16, 2007Publication date: January 22, 2009Inventors: Cheng-Chung Shih, Yuh-Min Lin, Jia-Yang Koo
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Publication number: 20080054985Abstract: A signal generating and switching apparatus and a method thereof are provided. According to a simple layout technique, the signal switching apparatus is formed in each layer of a plurality of metal layers in an integrated circuit. When there is a need to correct any one of the plurality of conductive layers in the integrated circuit, the changing of the signal switching apparatus in that conductive layer can be achieved by changing mask patterns of the conductive layer. As a result, the transmission path of signals in the conductive layer is changed, and the purpose to change output logic signals is achieved. Therefore, there is no need to change additional conductive layers, thereby significantly reducing the correcting cost of the integrated circuit.Type: ApplicationFiled: May 23, 2007Publication date: March 6, 2008Applicant: NOVATEK MICROELECTRONICS CORP.Inventors: Chang-Tien Tsai, Cheng-Chung Shih, Shih-Pin Hsu
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Patent number: 7251217Abstract: A communications network switch includes a plurality of network ports for transmitting and receiving packets to and from network nodes via network links, each of the packets having a destination address and a source address, the switch being operative to communicate with at least one trunking network device via at least one trunk formed by a plurality of aggregated network links. The communications network switch provides a method and apparatus for balancing the loading of aggregated network links of the trunk, thereby increasing the data transmission rate through the trunk.Type: GrantFiled: August 7, 2003Date of Patent: July 31, 2007Assignee: Broadcom CorporationInventors: David Wong, Cheng-chung Shih, Jun Cao, William Dai
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Publication number: 20070019969Abstract: An apparatus and a method for converting optical signal into electrical signal are disclosed. The apparatus includes a photo diode (PD) and a charge pump circuit. The PD receives an optical signal. The optical signal is then converted into a current signal. The charge pump circuit is electrically connected to the PD and performs a charge-discharge to generate a pulse signal based on the current signal. The characteristic of the pulse signal relates to the intensity of the optical signal.Type: ApplicationFiled: September 5, 2006Publication date: January 25, 2007Inventors: Cheng-chung Shih, Yuh-Min Lin
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Publication number: 20040037278Abstract: A communications network switch includes a plurality of network ports for transmitting and receiving packets to and from network nodes via network links, each of the packets having a destination address and a source address, the switch being operative to communicate with at least one trunking network device via at least one trunk formed by a plurality of aggregated network links. The communications network switch provides a method and apparatus for balancing the loading of aggregated network links of the trunk, thereby increasing the data transmission rate through the trunk.Type: ApplicationFiled: August 7, 2003Publication date: February 26, 2004Applicant: Broadcom CorporationInventors: David Wong, Cheng-Chung Shih, Jun Cao, William Dai
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Patent number: 6614758Abstract: A communications network switch includes a plurality of network ports for transmitting and receiving packets to and from network nodes via network links, each of the packets having a destination address and a source address, the switch being operative to communicate with at least one trunking network device via at least one trunk formed by a plurality of aggregated network links. The communications network switch provides a method and apparatus for balancing the loading of aggregated network links of the trunk, thereby increasing the data transmission rate through the trunk.Type: GrantFiled: January 10, 2002Date of Patent: September 2, 2003Inventors: David Wong, Cheng-chung Shih, Jun Cao, William Dai
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Publication number: 20020141412Abstract: A communications network switch includes a plurality of network ports for transmitting and receiving packets to and from network nodes via network links, each of the packets having a destination address and a source address, the switch being operative to communicate with at least one trunking network device via at least one trunk formed by a plurality of aggregated network links. The communications network switch provides a method and apparatus for balancing the loading of aggregated network links of the trunk, thereby increasing the data transmission rate through the trunk.Type: ApplicationFiled: January 10, 2002Publication date: October 3, 2002Applicant: Broadcom CorporationInventors: David Wong, Cheng-Chung Shih, Jun Cao, William Dai
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Patent number: 6363077Abstract: A communications network switch includes a plurality of network ports for transmitting and receiving packets to and from network nodes via network links, each of the packets having a destination address and a source address, the switch being operative to communicate with at least one trunking network device via at least one trunk formed by a plurality of aggregated network links. The communications network switch provides a method and apparatus for balancing the loading of aggregated network links of the trunk, thereby increasing the data transmission rate through the trunk.Type: GrantFiled: February 12, 1999Date of Patent: March 26, 2002Assignee: Broadcom CorporationInventors: David Wong, Cheng-chung Shih, Jun Cao, William Dai
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Patent number: 6288604Abstract: An amplifier circuit is responsive to an input data signal which is substantially DC balanced. The amplifier circuit is operative to generate an amplified data signal, and includes: a limiting amplifier responsive to the input data signal and to an error correcting signal, the limiting amplifier being operative to generate the amplified data signal; a feed back circuit responsive to a signal proportional to the amplified data signal, the feed back circuit being operative to generate the error correcting signal. The feed back circuit includes: a low pass filter responsive to the signal proportional to the amplified data signal, and operative to generate a filtered signal; and an error amplifier responsive to the filtered signal, and operative to provide the error correcting signal to the limiting amplifier; whereby offset voltage caused by process characteristics of the limiting amplifier, and temperature variations in the limiting amplifier are canceled by the error correcting feedback signal.Type: GrantFiled: February 3, 1999Date of Patent: September 11, 2001Assignee: Broadcom CorporationInventors: Cheng-chung Shih, Jiann-chyi Shieh
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Patent number: 6246692Abstract: A packet switching fabric includes a data ring, a control ring, a plurality of network links each coupled to at least one network node, and a plurality of switching devices coupled together by the data ring and the control ring so that the network links can be selectively communicatively coupled.Type: GrantFiled: June 5, 1998Date of Patent: June 12, 2001Assignee: Broadcom CorporationInventors: William Dai, Jason Chao, Cheng-chung Shih
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Patent number: 5267269Abstract: A data communication system employing predetermined equalized waveforms for transmit equalization is disclosed. Serial NRZ data is received from a network controller and utilized to select from memory its equivalent as predistorted and filtered Manchester encoded data. Predetermined waveforms in memory are representative of the analog waveform produced when predistorted digital Manchester encoded data is passed through a high order transmit filter. Data from memory drives a digital to analog converter (DAC) to reconstruct the waveforms into analog form. A line driver having an integrated single pole low pass filter impresses the equalized waveform on to the transmission line.Type: GrantFiled: September 4, 1991Date of Patent: November 30, 1993Assignee: Level One Communications, Inc.Inventors: Cheng-chung Shih, Haim Shafir, Stefan M. Wurster, Cecil Aswell, Daniel L. Ray, Joseph E. Heideman