Patents by Inventor Chun-Huang Lin

Chun-Huang Lin 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: 7342570
    Abstract: An optical mouse and image capture chip thereof. The image capture chip comprises an image sensor, a calculating logic circuit, and a refreshing logic circuit. The image sensor has a plurality of sensor units, capturing an image according to an exposure parameter to provide a plurality of exposure values. The calculating logic circuit provides an average exposure value by calculating the exposure values. If the exposure sample is within a first exposure range, the refreshing logic circuit maintains the exposure parameter and accordingly drives the image sensor to capture a next image. If the average exposure value is within a second exposure range, the refreshing logic circuit adjusts the exposure parameter with a first exposure extreme and accordingly drives the image sensor to capture a next image.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: March 11, 2008
    Assignee: PixArt Imaging, Inc.
    Inventors: Chun-Huang Lin, Jeng-Feng Lan
  • Patent number: 7324088
    Abstract: A pointing device with a locus smoothing function. The pointing device comprises a locus processing circuit receiving a digitized displacement and executing an accumulation procedure to generate an accumulated value of displacement, wherein when the accumulated value satisfies a preset condition, the accumulated value is output to a processing device for smoothing a locus of a pointer on a display device and a reset procedure is executed to reset the accumulated value.
    Type: Grant
    Filed: April 19, 2004
    Date of Patent: January 29, 2008
    Assignee: PixArt Imaging Inc.
    Inventors: Chun-Huang Lin, Jeng-Feng Lan
  • Publication number: 20070297545
    Abstract: A displacement estimation method is disclosed which comprises: a signal capturing step for capturing a signal; a displacement estimation step for calculating a displacement based on a state change of the signal; and an output step for outputting the displacement, in which the displacement estimation step includes one or more of the steps of: (A) consistency check to determine whether the state change of the signal is consistent with the waveform of the signal; (B) period prediction and compensation to count in the present period according to a proportional length of a previous period; and (C) adaptive threshold update to adjust the definition of the state change corresponding to the amplitude of the signal. A displacement estimation device employing this method, and a method for estimation of signal frequency based on bumping algorithm are also disclosed.
    Type: Application
    Filed: January 29, 2007
    Publication date: December 27, 2007
    Inventors: Hsin Chia Chen, Tzu Yi Chao, Chun Huang Lin, Jeng Feng Lan, Yi Fang Lee
  • Patent number: 7242391
    Abstract: An optical navigation chip. The optical navigation chip is appropriate for an optical pointing device and used for calculating a displacement of the optical navigation chip relative to an operating surface. The optical navigation chip comprises a photo sensor array driven by a photo sensor control circuit for detecting an image of the operating surface, a signal readout circuit coupled with the photo sensor array for reading out the image in analog format, an analog-to-digital conversion (ADC) circuit coupled with the signal readout circuit for converting the image from analog format to digital format, an image qualification circuit coupled with the ADC circuit for determining quality of the image and outputting a quality index accordingly, and a motion detection circuit for outputting the displacement according to the quality index.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: July 10, 2007
    Assignee: PixArt Imaging Inc.
    Inventors: Chun-Huang Lin, Jeng-Feng Lan, Chien-Chang Huang
  • Publication number: 20070053552
    Abstract: An image qualification method. A movements-determining method utilizes the image qualification, the image qualification method of which requires only an image frame to determine if the image frame is qualified. Thus, the image qualification proceeds in real time. The image qualification counts peaks of images of the frame to determine if a number of the peaks exceed a certain number, depending on application.
    Type: Application
    Filed: September 8, 2006
    Publication date: March 8, 2007
    Inventor: Chun-Huang Lin
  • Patent number: 7173652
    Abstract: A method to detect the movement of an image sensor. Movement is detected according to a first, second, third, and fourth frame, all captured by the image sensor. A first captured image region is captured from the first frame. Then, a first corresponding region matching the first captured image region is captured from the second frame, wherein the first corresponding region shifts in a predetermined direction relative to the first captured image region. Next, a second captured image region is captured from the third frame, wherein the second captured image region shifts in a direction opposite to the predetermined direction relative to the first captured image region. Then, a second corresponding region matching the second captured image region is captured from the fourth frame. Finally, the movement of the image sensor is determined according to the second captured image region and the second corresponding region.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: February 6, 2007
    Assignee: PixArt Imaging Inc.
    Inventors: Chun-Huang Lin, Jeng-Feng Lan, Chien-Chang Huang
  • Publication number: 20070002021
    Abstract: A method for adjusting an operation frequency of an optical input device is introduced. The method includes capturing and setting a first image as a reference frame of the optical input device; capturing and setting a plurality of frames as a plurality of sample frames of the optical input device; analyzing the plurality of sample frames according to the reference frame; capturing a second image according to a predetermined rule and setting the second image as the reference frame of the optical input device instead of the first image; and adjusting an operation frequency of the optical input device according to a time interval between setting the first image as the reference frame of the optical input device and setting the second image as the reference frame of the optical input device.
    Type: Application
    Filed: June 7, 2006
    Publication date: January 4, 2007
    Inventor: Chun-Huang Lin
  • Patent number: 7151561
    Abstract: A method to detect the movement of an image sensor according to captured images. An image region is captured from a first image. Then, a first corresponding region matching the first region is captured from a second image. A second image region is captured from the second image. Then, a second corresponding region matching the second captured image region is captured from the first image. Finally, the movement of the image sensor is determined according to the first region and the first corresponding region when a first relative distance between the first region and the first corresponding region is the same as a second relative distance of the second captured image region and the second corresponding region, but in the opposite direction.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: December 19, 2006
    Assignee: PixArt Imaging Inc
    Inventors: Chun-Huang Lin, Jeng-Feng Lan, Chien-Chang Huang
  • Patent number: 7142695
    Abstract: An image qualification method. A movements-determining method utilizes the image qualification, the image qualification method of which requires only an image frame to determine if the image frame is qualified. Thus, the image qualification proceeds in real time. The image qualification counts peaks of images of the frame to determine if a number of the peaks exceed a certain number, depending on application.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: November 28, 2006
    Assignee: PixArt Imaging Inc.
    Inventor: Chun-Huang Lin
  • Patent number: 7116801
    Abstract: An image qualification method. A movements-determining method utilizes the image qualification, the image qualification method of which requires only an image frame to determine if the image frame is qualified. Thus, the image qualification proceeds in real time. The image qualification counts peaks of images of the frame to determine if a number of the peaks exceed a certain number, depending on application.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: October 3, 2006
    Assignee: PixArt Imagning Inc.
    Inventor: Chun-Huang Lin
  • Publication number: 20060203094
    Abstract: A method to detect the movement of an image sensor. Movement is detected according to a first, second, third, and fourth frame, all captured by the image sensor. A first captured image region is captured from the first frame. Then, a first corresponding region matching the first captured image region is captured from the second frame, wherein the first corresponding region shifts in a predetermined direction relative to the first captured image region. Next, a second captured image region is captured from the third frame, wherein the second captured image region shifts in a direction opposite to the predetermined direction relative to the first captured image region. Then, a second corresponding region matching the second captured image region is captured from the fourth frame. Finally, the movement of the image sensor is determined according to the second captured image region and the second corresponding region.
    Type: Application
    Filed: May 1, 2006
    Publication date: September 14, 2006
    Inventors: Chun-Huang Lin, Jeng-Feng Lan, Chien-Chang Huang
  • Publication number: 20060181513
    Abstract: A method for increasing a report rate of a wireless mouse for decreasing delay time of the wireless mouse includes selecting a packet mode, inputting data corresponding to the selected packet mode according to control signals inputted into the wireless mouse, performing a first error check operation according to a first data, performing a second error check operation according to the first error check operation and the inputted data, forming an error check block according to the second error check operation, forming a packet according to the error check block and the inputted data, and outputting the packet through a radio-frequency channel.
    Type: Application
    Filed: March 14, 2006
    Publication date: August 17, 2006
    Inventors: Bi-Hui Lin, Chin-Hsin Yang, Chin-Chou Lee, Chun-Huang Lin, Wen-Yu Yang
  • Publication number: 20060146022
    Abstract: The present invention provides a method for increasing a report rate of a wireless mouse for decreasing delay time of the wireless mouse, which includes: selecting a packet mode from a plurality of packet modes and inputting data corresponding to the selected packet mode for forming a packet according to control signals inputted into the wireless mouse; and outputting the packet through a radio-frequency channel. The present invention further provides a method for reducing power consumption of a mouse, which includes: detecting a moving speed of the mouse; and transmitting packets with a low report rate when the moving speed of the mouse is less than a default value.
    Type: Application
    Filed: April 27, 2005
    Publication date: July 6, 2006
    Inventors: Bi-Hui Lin, Chin-Hsin Yang, Chin-Chou Lee, Chun-Huang Lin, Wen-Yu Yang
  • Publication number: 20060147091
    Abstract: An image qualification method. A movements-determining method utilizes the image qualification, the image qualification method of which requires only an image frame to determine if the image frame is qualified. Thus, the image qualification proceeds in real time. The image qualification counts peaks of images of the frame to determine if a number of the peaks exceed a certain number, depending on application.
    Type: Application
    Filed: February 28, 2006
    Publication date: July 6, 2006
    Inventor: Chun-Huang Lin
  • Patent number: 7053932
    Abstract: A method to detect the movement of an image sensor. Movement is detected according to a first, second, third, and fourth frame, all captured by the image sensor. A first captured image region is captured from the first frame. Then, a first corresponding region matching the first captured image region is captured from the second frame, wherein the first corresponding region shifts in a predetermined direction relative to the first captured image region. Next, a second captured image region is captured from the third frame, wherein the second captured image region shifts in a direction opposite to the predetermined direction relative to the first captured image region. Then, a second corresponding region matching the second captured image region is captured from the fourth frame. Finally, the movement of the image sensor is determined according to the second captured image region and the second corresponding region.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: May 30, 2006
    Assignee: PixArt Imaging Inc.
    Inventors: Chun-Huang Lin, Jeng-Feng Lan, Chien-Chang Huang
  • Patent number: 7050043
    Abstract: An optical apparatus. The optical apparatus is applied to an object surface, comprising a frame, a light emitting device and an optical sensor. The frame is disposed in the optical apparatus, having a first compartment and a second compartment, wherein the first compartment has a first opening and the second compartment has a second opening. The light emitting device is disposed in the first compartment, wherein light emitted from the light emitting device passes through the first opening and is reflected by the object surface outside the frame. The optical sensor is disposed in the second compartment to receive light reflected from the object surface passing through the second opening.
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: May 23, 2006
    Assignee: PixArt Imagning Inc.
    Inventors: Chien-Chang Huang, Chun-Huang Lin, Jeng-Feng Lan
  • Patent number: 7039218
    Abstract: A motion correction and compensation method for image sensors. A new flag and an old flag are used to detect the directions of movement and correct movements. A value of the new flag is set according to a direction of the present movement. A value of the old flag is set according to a previous movement. The values of the new flag and the old flag are compared to determine if the movement of a time is in the same direction as the movement of a previous time. The value of the old flag has a value for correcting the movement if movements at different time are in opposite direction. If movement is determined incorrect according to a reference image and a new image, previous movement is output and occurrences of incorrect movements are counted. If the occurrences do not exceed a maximum number, the next movement is predicted. If the next movement exceeds a maximum movement or the occurrences exceed a maximum number, the reference image is updated.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: May 2, 2006
    Assignee: PixArt Imaging Inc.
    Inventor: Chun-Huang Lin
  • Publication number: 20050289251
    Abstract: A single chip device includes a first transmission interface connected to an external testing device, a second transmission interface connected to the testing device, and a processor unit coupled to the first and second transmission interfaces and operable in one of a normal operating mode, where data transmission between the single chip device and the testing device is performed at a first transmission rate via the first transmission interface, and a testing mode, where data transmission between the single chip device and the testing device is performed at a second transmission rate different from the first transmission rate via the second transmission interface. A method and system for testing the single chip device are also disclosed.
    Type: Application
    Filed: October 25, 2004
    Publication date: December 29, 2005
    Inventors: Chin-Chou Lee, Chun-Huang Lin
  • Publication number: 20050200597
    Abstract: A computer system includes a display, a graphics chip capable of controlling the display and modulating light signals emitted from a plurality of sub-blocks in a main block on the display sequentially according to a predetermined rule, a digitizer comprising a light signal detecting module which is capable of detecting a light signal emitted from the display and sending a corresponding signal when the light signal emitted from the display is detected, a light signal processing unit for processing signals sent from the light signal detecting module and generating a detection succeeded signal when the result of the processing shows the modulation of the light signals emitted by the display according to the predetermined rule is detected by the light signal detecting module, and a positioning unit for determining the position of the digitizer on the display according to the predetermined rule.
    Type: Application
    Filed: December 26, 2004
    Publication date: September 15, 2005
    Inventors: Shao-Chih Peng, Jeng-Feng Lan, Chun-Huang Lin
  • Publication number: 20050168444
    Abstract: A light control module appropriate for an optical pointing device. The light control module comprises a processing unit outputting a first signal and a second signal, a photo sensor unit executing a capture operation according to an impulse of the first signal, and a light emitting unit executing a light emitting operation according to an impulse of the second signal, wherein when a frequency value of the first signal is less than a first preset value, at least one impulse is inserted between two successive impulses of the second signal for adjusting a frequency value of the second signal such that an equivalent frequency value corresponding to any two successive impulses of the second signal is greater than a second preset value, thus rendering flickers of the light emitting unit imperceptible.
    Type: Application
    Filed: December 6, 2004
    Publication date: August 4, 2005
    Inventors: Chun-Huang Lin, Jeng-Feng Lan