Patents by Inventor Peter L. Cheng

Peter L. 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: 6650436
    Abstract: A printer in which the speed at which the recording medium is loaded into the printer prior to printing, at which the recording medium is moved through the printer during printing, and at which the recording medium is ejected from the printer after printing, are automatically selected based upon existing print modes and printing-related conditions, and which provides for concurrent pre-printing processes and tasks to occur during the loading of the recording medium.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: November 18, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Hamamoto, Peter L. Cheng, Takao Aichi, Kazuyuki Masumoto, Akitoshi Yamada
  • Patent number: 6594028
    Abstract: A printer driver executable in a computer connectable to a driven printer. In response to initiation of a print job, the print driver obtains current status of the printer. Based on the status of the printer, the print driver modifies operational parameters of the printer prior to commencement of the print job, so that the operational parameters are different from default ones of such parameters. In addition, the print driver modifies its own operational sequence based on the printer status, so that the operational sequence of the printer is different from a default sequence without such status information.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: July 15, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Hamamoto, Peter L. Cheng, Steven Noyes, Tetsu Kaneko, Takao Aichi, Kazuyuki Masumoto, Akitoshi Yamada
  • Patent number: 6587038
    Abstract: A system and method for generating an audible sound in an imaging device is provided, the device having an electronic motor controllable by a first operation sequence to perform a first function. When a condition is detected for which an audible sound is to be generated as notification of the condition, a motor is rotated according to a second operation sequence so as to create the audible sound as notification of the condition, wherein the second operation sequence causes the motor to rotate in a manner, other than the motor rotation resulting from the first operation sequence, so as to cause the motor to perform only the notification function.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: July 1, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Peter L. Cheng, Akihiko Hamamoto, Takao Aichi
  • Patent number: 6557961
    Abstract: A method of preventing printing artifacts by detecting a distance between the print head and the recording medium as the print head and the recording medium and utilizes the detected distance in determining an adjusted ink ejection frequency. The adjusted ejection frequency for each print head scan position may be stored in a look up table.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: May 6, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Peter L. Cheng, Akihiko Hamamoto, Takao Aichi
  • Publication number: 20020196130
    Abstract: A system and method for generating an audible sound in an imaging device is provided, the device having an electronic motor controllable by a first operation sequence to perform a first function. When a condition is detected for which an audible sound is to be generated as notification of the condition, a motor is rotating according to a second operation sequence so as to create the audible sound as notification of the condition, wherein the second operation sequence causes the motor to rotate in a manner, other than the motor rotation resulting from the first operation sequence, so as to cause the motor to perform only the notification function.
    Type: Application
    Filed: June 22, 2001
    Publication date: December 26, 2002
    Inventors: Peter L. Cheng, Akihiko Hamamoto, Takao Aichi
  • Publication number: 20020196298
    Abstract: Control of an ink ejection frequency to compensate for recording medium unevenness in printing by inducing a predetermined unevenness pattern into the recording medium, determining an adjusted ink ejection frequency for each of a plurality of print head scan positions for a scan of the print head across the recording medium, the adjusted ink ejection frequency being determined at least in part based on the induced unevenness pattern, adjusting a base ink ejection frequency for each scan position of the print head based on the determined adjusted ejection frequency, and controlling ink ejection by the print head based on the adjusted ink ejection frequency. The determined adjusted ink ejection frequency may be stored in a recording medium in a look-up table with the adjusted ink ejection frequency being obtained from the look-up table.
    Type: Application
    Filed: June 22, 2001
    Publication date: December 26, 2002
    Inventors: Peter L. Cheng, Akihiko Hamamoto, Takao Aichi
  • Patent number: 6421581
    Abstract: Feeding a plurality of successive sheets of a recording medium by calculating an expected time for a page end detection of a current sheet, and feeding a next sheet of the successive sheets in accordance with the calculated time, but prior to detection of the page end of the current sheet. Calculating the expected time may be detecting the page end for the current sheet, and mathematically filtering the page end detection of the current sheet with a current estimate of expected time for page end detection of the next sheet. The current estimate may be initialized after a first sheet of the successive sheets with a page end detection of the first sheet. The feeding of the next sheet may be controlled by controlling a time between the current sheet and the next sheet based on a time between the page end detection of the current sheet and a detection of the next sheet so as to obtain and maintain the time within a target range.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: July 16, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Hamamoto, Akitoshi Yamada, Peter L. Cheng, Takao Aichi, Hiromitsu Hirabayashi
  • Patent number: 6108101
    Abstract: A printing method is provided for use with a printer which reads and then outputs to a printer head a fixed number of bits at a time so as to permit the printer to use a printer head having a number of nozzles which is different than the fixed number of bits. According to this technique, bit data corresponding to an image band to be printed is obtained, the band including multiple pixel arrays, the pixels in each pixel array being arranged in a manner similar to the nozzles in a printer head. In a first loading step, bit data for m pixels of an i-th pixel array are loaded into a register in the printer head, m being a predetermined integer, and i being an arbitrary integer. In a second loading step, bit data for n pixels of an (i+1)-th pixel array are loaded into the register in the printer head, n being a predetermined integer.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: August 22, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Peter L. Cheng, Tetsuya Kawanabe, Hiroyuki Ueda