Patents by Inventor Ben-Chuan Du

Ben-Chuan Du 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: 9063723
    Abstract: A method for comparing a first subroutine and a second subroutine in functionality, includes: defining a plurality of instruction sets, each instruction set associated with a corresponding instruction set process; obtaining a first program section and a second program section from a first subroutine and a second subroutine, respectively, and categorizing the first subroutine and the second subroutine to one of the instruction sets, respectively; performing a program section comparison process to select and perform one of the instruction sets according to the instruction set to which the first program section is categorized and the instruction set to which the second program section is categorized, so as to compare whether the first program section and the second program section have identical functions, and to accordingly determine whether the first subroutine and the second subroutine are equivalent in functionality.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: June 23, 2015
    Assignee: MStar Semiconductor, Inc.
    Inventor: Ben-Chuan Du
  • Publication number: 20130262843
    Abstract: A method for comparing a first subroutine and a second subroutine in functionality, includes: defining a plurality of instruction sets, each instruction set associated with a corresponding instruction set process; obtaining a first program section and a second program section from a first subroutine and a second subroutine, respectively, and categorizing the first subroutine and the second subroutine to one of the instruction sets, respectively; performing a program section comparison process to select and perform one of the instruction sets according to the instruction set to which the first program section is categorized and the instruction set to which the second program section is categorized, so as to compare whether the first program section and the second program section have identical functions, and to accordingly determine whether the first subroutine and the second subroutine are equivalent in functionality.
    Type: Application
    Filed: January 23, 2013
    Publication date: October 3, 2013
    Applicant: MSTAR SEMICONDUCTOR, INC.
    Inventor: Ben-Chuan Du
  • Patent number: 7671566
    Abstract: A method for predicting remaining capacity of a battery includes: (a) determining an initial battery capacity; (b) measuring a second voltage; (c) calculating a maximum possible battery voltage and a minimum possible battery voltage according to the second voltage, a maximum possible battery current and a minimum possible battery current, and an internal resistance; (d) calculating a maximum possible battery remaining capacity and a minimum possible battery remaining capacity according to the maximum possible battery voltage, the minimum possible battery voltage, and the voltage-remaining capacity table; (e) comparing the maximum possible battery current with the minimum possible battery current; and (f) calculating a remaining capacity of the battery according to a comparison result in step (e), the maximum possible battery remaining capacity, and the minimum possible battery remaining capacity.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: March 2, 2010
    Assignee: Qisda Corporation
    Inventor: Ben-Chuan Du
  • Patent number: 7471794
    Abstract: The method includes: associating different cell phones to different enciphering and deciphering keys of an asymmetric encryption algorithm. Access information of the network lock corresponding to the cell phone is enciphered by the corresponding enciphering key. Then, the enciphered network lock is stored in the cell phone, and the corresponding deciphering key is recorded in an inerasable memory of the cell phone. The original plaintext access information of the network lock and the enciphering key is stored only in a service provider of the communication network. When the cell phone tries to access the communication network, it deciphers the enciphered network lock using the deciphering key stored in the inerasable memory to verify the network lock of the cell phone.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: December 30, 2008
    Assignee: Qisda Corporation
    Inventors: Chen-Huang Fan, Ben-Chuan Du, Yi-Wen Cheng
  • Publication number: 20080116853
    Abstract: A method for predicting remaining capacity of a battery includes: (a) determining an initial battery capacity; (b) measuring a second voltage; (c) calculating a maximum possible battery voltage and a minimum possible battery voltage according to the second voltage, a maximum possible battery current and a minimum possible battery current, and an internal resistance; (d) calculating a maximum possible battery remaining capacity and a minimum possible battery remaining capacity according to the maximum possible battery voltage, the minimum possible battery voltage, and the voltage-remaining capacity table; (e) comparing the maximum possible battery current with the minimum possible battery current; and (f) calculating a remaining capacity of the battery according to a comparison result in step (e), the maximum possible battery remaining capacity, and the minimum possible battery remaining capacity.
    Type: Application
    Filed: November 21, 2007
    Publication date: May 22, 2008
    Inventor: Ben-Chuan Du
  • Patent number: 7295858
    Abstract: A device for ring tone output. The device comprises a phone speaker, a ringing speaker, a receiver, a switching device and a micro-controller. The receiver acquires audio data via a traffic channel. The audio data comprises a ring tone. The switching device receives the ring tone and selectively transmits the ring tone to the phone speaker and the ringing speaker. The micro-controller directs the switching device to transmit the ring tone to the ringing speaker.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: November 13, 2007
    Assignee: Benq Corporation
    Inventors: Chen-Huang Fan, Ben-Chuan Du, Yi-Wen Cheng
  • Publication number: 20070194758
    Abstract: When charging a battery in an electronic device, if a charging current or voltage is too high, the electronic device sends a command to stop the charging. However, if an error occurs in the charge circuit, leading to continuous charging of the battery instead of stopping the charging, then the electronic device enters a power consumption mode to consume electric power charged to the battery in the electronic device. This reduces damage due to overcharging the battery.
    Type: Application
    Filed: February 15, 2007
    Publication date: August 23, 2007
    Inventor: Ben-Chuan Du
  • Publication number: 20070197191
    Abstract: A method for checking a wireless communication device includes detecting whether the configuration of the wireless communication device conforms to a predetermined rule when a status of the wireless communication device conforms to a predetermined status, and executing a corresponding procedure when the configuration of the wireless communication device does not conform to the predetermined rule.
    Type: Application
    Filed: February 15, 2007
    Publication date: August 23, 2007
    Inventor: Ben-Chuan Du
  • Patent number: 7127228
    Abstract: A portable electronic device with power failure recovery, powered by a main power source, the device comprising a power detection module, a processor, a timing unit and a power management unit. The power detection module detects an output characteristic from the main power source and asserts an interrupt signal if the characteristic is below a threshold value. The processor asserts a turn-off signal and an enable signal in response to the interrupt signal. The timing unit asserts a notification signal at a predetermined time interval when the enable signal is asserted. Upon receipt of the turn-off signal, the power management unit disconnects the main power source from a circuit block. Moreover, the power management unit reconnects the main power source to the circuit block when the notification signal is asserted and the output characteristic of the main power source is beyond the threshold value.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: October 24, 2006
    Assignee: Acer Communications and Multimedia Inc.
    Inventors: Hsin-Chin Chang, Chen-Huang Fan, Ben-Chuan Du
  • Patent number: 7079873
    Abstract: A method and related apparatus for reducing power consumption of a cell phone. The method includes: when the cell phone is in an idle state, connecting to a base station after a time interval several times that of the discrete receiving (DRX) time interval assigned by the base station so as to still maintain a logged-in state to the base station but to decrease radio transmissions and save power.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: July 18, 2006
    Assignee: BenQ Corporation
    Inventors: Chen-Huang Fan, Ben-Chuan Du
  • Patent number: 7063400
    Abstract: The present invention is related to an apparatus and a method for improving the quality of printing. The reference timings are adjusted by random values to decrease the cyclic unevenness of images associated with the conventional technique. The random values may be generated by the apparatus itself or may be received from an external device, such as a personal computer. The distance between two adjacent dots changes, and the unevenness of images is scattered to provide a higher quality of printing.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: June 20, 2006
    Assignee: Benq Corporation
    Inventors: Ben-Chuan Du, Yung-Li Li
  • Patent number: 6999571
    Abstract: The invention provides a device, used in a communication apparatus, for generating a mediate ring information and playing a ring signal based on the mediate ring information. The device comprises a receiving module, a processing module, an analyzing module, a storage module and a playing module. The receiving module receives an audio digital signal. The processing module divides the audio digital signal into a plurality of sub-signals in a predetermined period and then transfers the plurality of sub-signals into a plurality of sets of frequency spectrums. The analyzing module retrieves at least one frequency with largest amplitude in each of the plurality of sets of frequency spectrums respectively, and stores the retrieved frequencies in series to generate the mediate ring information. The storage module stores the mediate ring information and a plurality of predetermined tone information.
    Type: Grant
    Filed: July 9, 2003
    Date of Patent: February 14, 2006
    Assignee: Benq Corporation
    Inventor: Ben-Chuan Du
  • Publication number: 20050195180
    Abstract: A method of displaying additional colors is provided to enable a flat panel display (FPD) to display a required color which is originally unavailable due to hardware limitations of the FPD by using two available colors of the FPD, such as, a first and a second color. At least a pixel of the FPD is initiated to display the first color and a response time of the FPD is allowed to substantially elapse. Next, the pixel is initiated to display the second color, and at least a time equivalent to a display-achieving period is allowed to elapse, in which the period is based on, numerically, the first and second colors, the required color, and the response time. The pixel is then initiated to change its color alternately in a sufficiently small scale, thus achieving displaying the required color substantially.
    Type: Application
    Filed: March 7, 2005
    Publication date: September 8, 2005
    Inventors: Ben-Chuan Du, Yi-Wen Cheng
  • Publication number: 20050119033
    Abstract: A device for ring tone output. The device comprises a phone speaker, a ringing speaker, a receiver, a switching device and a micro-controller. The receiver acquires audio data via a traffic channel. The audio data comprises a ring tone. The switching device receives the ring tone and selectively transmits the ring tone to the phone speaker and the ringing speaker. The micro-controller directs the switching device to transmit the ring tone to the ringing speaker.
    Type: Application
    Filed: August 5, 2004
    Publication date: June 2, 2005
    Inventors: Chen-Huang Fan, Ben-Chuan Du, Yi-Wen Cheng
  • Publication number: 20050088143
    Abstract: A mobile electronic device includes a battery, a battery voltage indication module, a compensation database and a compensation processing module. The battery voltage indication module is for showing battery voltages. The compensation database is for storing compensating values of corresponding power consumption devices. The compensation processing module is for detecting whether the power consumption devices are turned on, for gathering corresponding compensating values of the actuated power consumption devices from the compensation database, and for defining compensation results in accordance with the battery voltage and the compensating values then transmits to the battery voltage indication so as to stabilize the battery voltage indication.
    Type: Application
    Filed: October 18, 2004
    Publication date: April 28, 2005
    Inventors: Tung-Feng Yang, Ben-Chuan Du
  • Publication number: 20050053241
    Abstract: The method includes: associating different cell phones to different enciphering and deciphering keys of an asymmetric encryption algorithm. Access information of the network lock corresponding to the cell phone is enciphered by the corresponding enciphering key. Then, the enciphered network lock is stored in the cell phone, and the corresponding deciphering key is recorded in an inerasable memory of the cell phone. The original plaintext access information of the network lock and the enciphering key is stored only in a service provider of the communication network. When the cell phone tries to access the communication network, it deciphers the enciphered network lock using the deciphering key stored in the inerasable memory to verify the network lock of the cell phone.
    Type: Application
    Filed: April 2, 2004
    Publication date: March 10, 2005
    Inventors: Chen-Huang Fan, Ben-Chuan Du, Yi-Wen Cheng
  • Publication number: 20040185918
    Abstract: A method and related apparatus for reducing power consumption of a cell phone. The method includes: when the cell phone is in an idle state, connecting to a base station after a time interval several times that of the discrete receiving (DRX) time interval assigned by the base station so as to still maintain a logged-in state to the base station but to decrease radio transmissions and save power.
    Type: Application
    Filed: March 19, 2004
    Publication date: September 23, 2004
    Inventors: Chen-Huang Fan, Ben-Chuan Du
  • Publication number: 20040101129
    Abstract: The invention provides a device, used in a communication apparatus, for generating a mediate ring information and playing a ring signal based on the mediate ring information. The device comprises a receiving module, a processing module, an analyzing module, a storage module and a playing module. The receiving module receives an audio digital signal. The processing module divides the audio digital signal into a plurality of sub-signals in a predetermined period and then transfers the plurality of sub-signals into a plurality of sets of frequency spectrums. The analyzing module retrieves at least one frequency with largest amplitude in each of the plurality of sets of frequency spectrums respectively, and stores the retrieved frequencies in series to generate the mediate ring information. The storage module stores the mediate ring information and a plurality of predetermined tone information.
    Type: Application
    Filed: July 9, 2003
    Publication date: May 27, 2004
    Applicant: Benq Corporation
    Inventor: Ben-Chuan Du
  • Patent number: 6705699
    Abstract: An image output device includes two color ink cartridges. The first color ink cartridge is filled with yellow ink, magenta ink, and cyan ink. Besides, the yellow ink nozzle, first magenta ink nozzle, first cyan ink nozzle eject the yellow ink, magenta ink, and cyan ink respectively. The second color ink cartridge is filled with black ink, magenta ink, and cyan ink. Besides, the black ink nozzle, second magenta ink nozzle, and second cyan ink nozzle ejects the black ink, magenta ink, and cyan ink respectively. The second magenta ink nozzle has a diameter smaller that of the first magenta ink nozzle, and the second cyan ink nozzle has a diameter smaller that of the first cyan ink nozzle. The color ink cartridge ink having the nozzle with small diameter is driven to create small ink drops or light ink drops. It improves the image resolution and creates a six-color tone expression. Moreover, the cost of manufacturing the printhead will not increase and the controlling method will not become complicated.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: March 16, 2004
    Assignee: Benq Corporation
    Inventors: Ben-Chuan Du, Yung-Yi Li
  • Publication number: 20040013269
    Abstract: The invention provides a device, used in a communication apparatus including a cipher-key generating module, for securing a subscriber's information. The device includes a storage module, a cipher-key acquiring module, an encrypting module and a decrypting module. The subscriber's information is stored in the storage module. The cipher-key acquiring module transmits an input to the cipher-key generating module, and then receives a cipher key generated by the cipher-key generating module in response to the input. The encrypting module retrieves the cipher key through the cipher-key acquiring module, retrieves the subscriber's information from the storage module, and encrypts the subscriber's information using the cipher key to generate an encrypted information. After generated, the encrypted information is stored into the storage module and replaces the subscriber's information.
    Type: Application
    Filed: July 10, 2003
    Publication date: January 22, 2004
    Applicant: BENQ CORPORATION
    Inventors: Ben-Chuan Du, Chen-Huang Fan