Patents by Inventor Chia-Cheun LIANG
Chia-Cheun LIANG 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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Patent number: 10359868Abstract: The present invention discloses a method and apparatus for controlling an object movement on a screen. The method senses a first change in a position of a pointing device in a coordinate system to obtain a first displacement, and controls the object movement by a first displacement output ratio according to the first displacement. The method senses a second change in a position of the pointing device in a coordinate system to obtain a second displacement, and controls the object movement by a second displacement output ratio when a difference between a direction of the first displacement and a direction of the second displacement exceeds a first angle threshold, wherein the second displacement output ratio is lower than the first displacement output ratio.Type: GrantFiled: July 5, 2017Date of Patent: July 23, 2019Assignee: PIXART IMAGING INCORPORATIONInventors: Chia-Cheun Liang, Yi-Hsien Ko
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Patent number: 10255518Abstract: An image determining method for scanning an image and determining specific image pixels of a specific image. The method comprises: determining at least one pixel in a first row having brightness value larger than a threshold value as the specific image pixel; defining a leftmost pixel and a rightmost pixel of the specific image pixel in the first row as a leftmost edge and a rightmost edge of a first specific image range; and defining a second specific image range in a second row of the image, which is next to the first row. Column positions of a leftmost edge and a rightmost edge of the second specific image range are respectively the same with column positions of the leftmost edge and the rightmost edge of the first specific image range. Via this method, the determining for the specific image pixels is more accurate.Type: GrantFiled: July 17, 2016Date of Patent: April 9, 2019Assignee: PixArt Imaging Inc.Inventors: Chia-Cheun Liang, Shu-Sian Yang, Yi-Hsien Ko
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Patent number: 10228772Abstract: There is provided an optical pointing system including at least one reference beacon, an image sensor, a storage unit and a processing unit. The image sensor is configured to capture an image frame containing a beacon image associated with the at least one reference beacon. The storage unit is configured to save image data of at least one object image in the image frame. The processing unit is configured to sequentially process every pixel of the image frame for identifying the object image and real-timely remove or merge the image data, saved in the storage unit, associated with two object images within a pixel range of the image frame thereby reducing the used memory space.Type: GrantFiled: February 9, 2018Date of Patent: March 12, 2019Assignee: PIXART IMAGING INC.Inventor: Chia-Cheun Liang
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Patent number: 10114473Abstract: An interactive system includes a display, a processor and a remote controller. The display includes at least one reference beacon for providing light with a predetermined feature. The remote controller includes an image sensor configured to capture an image containing the reference beacon and calculates an aiming coordinate according to an imaging position of the reference beacon in the captured image. The processor calculates a scale ratio of a pixel size of the display with respect to that of the image captured by the image sensor and moves a cursor position according to the scale ratio and the aiming coordinate.Type: GrantFiled: June 25, 2013Date of Patent: October 30, 2018Assignee: PIXART IMAGING INCInventors: Chi-Yang Huang, Chia-Cheun Liang, Chao-Chien Huang, Han-Ping Cheng, Ming-Tsan Kao
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Patent number: 10067576Abstract: An exemplary embodiment of the present disclosure provides a handheld pointer device and a tilt angle adjustment method thereof. The tilt angle adjustment method includes the following steps. Images corresponding to the position of a reference point are captured as the handheld pointer device pointing toward the reference point to generate a plurality of frames. Whether the reference point has substantially moved is subsequently determined based on the plurality of frames. When determines that the reference point has not substantially moved, causes an accelerometer unit of the handheld pointer device to detect the accelerations thereof over various axes so as to update a first tilt angle being used currently to a second tilt angle, accordingly. The handheld pointer device may thus accurately and efficiently calculate the relative position of the reference point with the appropriate tilt angle of the handheld pointer device used.Type: GrantFiled: May 8, 2014Date of Patent: September 4, 2018Assignee: PIXART IMAGING INC.Inventors: Han-Ping Cheng, Chao-Chien Huang, Chia-Cheun Liang
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Publication number: 20180164898Abstract: There is provided an optical pointing system including at least one reference beacon, an image sensor, a storage unit and a processing unit. The image sensor is configured to capture an image frame containing a beacon image associated with the at least one reference beacon. The storage unit is configured to save image data of at least one object image in the image frame. The processing unit is configured to sequentially process every pixel of the image frame for identifying the object image and real-timely remove or merge the image data, saved in the storage unit, associated with two object images within a pixel range of the image frame thereby reducing the used memory space.Type: ApplicationFiled: February 9, 2018Publication date: June 14, 2018Inventor: Chia-Cheun LIANG
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Patent number: 9958961Abstract: There is provided an optical pointing system including at least one reference beacon, an image sensor, a storage unit and a processing unit. The image sensor is configured to capture an image frame containing a beacon image associated with the at least one reference beacon. The storage unit is configured to save image data of at least one object image in the image frame. The processing unit is configured to sequentially process every pixel of the image frame for identifying the object image and real-timely remove or merge the image data, saved in the storage unit, associated with two object images within a pixel range of the image frame thereby reducing the used memory space.Type: GrantFiled: August 3, 2017Date of Patent: May 1, 2018Assignee: PIXART IMAGING INC.Inventor: Chia-Cheun Liang
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Patent number: 9933863Abstract: An optical object recognition system includes at least two beacons, an image sensor and a processing unit. The beacons operate in an emission pattern and the emission pattern of the beacons has a phase shift from each other. The image sensor captures image frames with a sampling period. The processing unit is configured to recognize different beacons according to the phase shift of the emission pattern in the image frames.Type: GrantFiled: May 30, 2013Date of Patent: April 3, 2018Assignee: PIXART IMAGING INC.Inventors: Chia-Cheun Liang, Yi-Hsien Ko, Han-Ping Cheng
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Publication number: 20170329418Abstract: There is provided an optical pointing system including at least one reference beacon, an image sensor, a storage unit and a processing unit. The image sensor is configured to capture an image frame containing a beacon image associated with the at least one reference beacon. The storage unit is configured to save image data of at least one object image in the image frame. The processing unit is configured to sequentially process every pixel of the image frame for identifying the object image and real-timely remove or merge the image data, saved in the storage unit, associated with two object images within a pixel range of the image frame thereby reducing the used memory space.Type: ApplicationFiled: August 3, 2017Publication date: November 16, 2017Inventor: Chia-Cheun LIANG
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Publication number: 20170300131Abstract: The present invention discloses a method and apparatus for controlling an object movement on a screen. The method senses a first change in a position of a pointing device in a coordinate system to obtain a first displacement, and controls the object movement by a first displacement output ratio according to the first displacement. The method senses a second change in a position of the pointing device in a coordinate system to obtain a second displacement, and controls the object movement by a second displacement output ratio when a difference between a direction of the first displacement and a direction of the second displacement exceeds a first angle threshold, wherein the second displacement output ratio is lower than the first displacement output ratio.Type: ApplicationFiled: July 5, 2017Publication date: October 19, 2017Inventors: Chia-Cheun Liang, Yi-Hsien Ko
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Patent number: 9766717Abstract: There is provided an optical pointing system including at least one reference beacon, an image sensor, a storage unit and a processing unit. The image sensor is configured to capture an image frame containing a beacon image associated with the at least one reference beacon. The storage unit is configured to save image data of at least one object image in the image frame. The processing unit is configured to sequentially process every pixel of the image frame for identifying the object image and real-timely remove or merge the image data, saved in the storage unit, associated with two object images within a pixel range of the image frame thereby reducing the used memory space.Type: GrantFiled: March 22, 2016Date of Patent: September 19, 2017Assignee: PixArt Imaging Inc.Inventor: Chia-Cheun Liang
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Patent number: 9727152Abstract: The present invention discloses a method and apparatus for controlling an object movement on a screen. The method senses a first change in a position of a pointing device in a coordinate system to obtain a first displacement, and controls the object movement by a first displacement output ratio according to the first displacement. The method senses a second change in a position of the pointing device in a coordinate system to obtain a second displacement, and controls the object movement by a second displacement output ratio when a difference between a direction of the first displacement and a direction of the second displacement exceeds a first angle threshold, wherein the second displacement output ratio is lower than the first displacement output ratio.Type: GrantFiled: September 19, 2013Date of Patent: August 8, 2017Assignee: PixArt Imaging Incorporation, R.O.C.Inventors: Chia-Cheun Liang, Yi-Hsien Ko
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Patent number: 9684386Abstract: There is provided an optical pointing system including at least one reference beacon, an image sensor, a storage unit and a processing unit. The image sensor is configured to capture an image frame containing a beacon image associated with the at least one reference beacon. The storage unit is configured to save image data of at least one object image in the image frame. The processing unit is configured to sequentially process every pixel of the image frame for identifying the object image and real-timely remove or merge the image data, saved in the storage unit, associated with two object images within a pixel range of the image frame thereby reducing the used memory space.Type: GrantFiled: March 22, 2016Date of Patent: June 20, 2017Assignee: PIXART IMAGING INC.Inventor: Chia-Cheun Liang
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Patent number: 9626007Abstract: An image detecting method, comprising: controlling a synchronizing controller to transmit a first activating signal to a light source controller; controlling the light source controller to control at least one light source to generate a predetermined radiating pattern, and controlling the light source controller to transmit back a first responding signal to the synchronizing controller when the light source controller receives the first activating signal; and controlling an image sensor to start an image detecting when the synchronizing controller receives the first responding signal.Type: GrantFiled: March 14, 2013Date of Patent: April 18, 2017Assignee: PixArt Imaging Inc.Inventors: Chia-Cheun Liang, Wen-Yu Yang, Chao-Chien Huang, Chi-Yang Huang, Hung-Yu Lee, Ming-Tsan Kao
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Patent number: 9606639Abstract: There is provided a pointing system including an image sensor, a plurality of reference marks and a processing unit. The image sensor is configured to capture image frames containing at least one reference mark image of the reference marks. The processing unit is configured to recognize an image number of the reference mark image and calculate an aiming point coordinate according to a positioning algorithm associated with the image number.Type: GrantFiled: December 4, 2013Date of Patent: March 28, 2017Assignee: PIXART IMAGING INC.Inventors: Ming-Tsan Kao, Chia-Cheun Liang
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Patent number: 9599988Abstract: There is provided a mobile carrier and an auto following system using the mobile carrier. The mobile carrier is capable of capturing at least an image of a guiding light source and automatically following the guiding light source based on the captured image of the guiding light source. The mobile carrier is further disposed with a mobile light source for a remote image sensing device to capture an image of the mobile light source while the mobile carrier cannot capture the image of the guiding light source, so that the mobile carrier can be guided by a control signal provided according to the captured image of the mobile light source.Type: GrantFiled: August 4, 2014Date of Patent: March 21, 2017Assignee: PIXART IMAGING INC.Inventors: Chia-Cheun Liang, Ming-Tsan Kao, Yi-Hsien Ko, Hsin-Chia Chen
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Publication number: 20160364627Abstract: An image determining method for scanning an image and determining specific image pixels of a specific image. The method comprises: determining at least one pixel in a first row having brightness value larger than a threshold value as the specific image pixel; defining a leftmost pixel and a rightmost pixel of the specific image pixel in the first row as a leftmost edge and a rightmost edge of a first specific image range; and defining a second specific image range in a second row of the image, which is next to the first row. Column positions of a leftmost edge and a rightmost edge of the second specific image range are respectively the same with column positions of the leftmost edge and the rightmost edge of the first specific image range. Via this method, the determining for the specific image pixels is more accurate.Type: ApplicationFiled: July 17, 2016Publication date: December 15, 2016Inventors: Chia-Cheun Liang, Shu-Sian Yang, Yi-Hsien Ko
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Patent number: 9477326Abstract: The present invention provides a method for determining an object position, including the following steps: determining the intensities of a plurality of pixels; determining that a portion of pixels in the plurality of pixels belong to an object image corresponding to an object; and determining coordinate data of the object based on a number of pixels in each row or column of the portion of the plurality of pixels belonging to the object image and the coordinates of pixels in the portion of the plurality of pixels belonging to the object image. The present invention also provides a pointing system.Type: GrantFiled: April 15, 2013Date of Patent: October 25, 2016Assignee: PIXARAT IMAGING INCORPORATIONInventors: Yi-Hsien Ko, Chia-Cheun Liang, Nien-Tse Chen
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Patent number: 9459140Abstract: A method of an optical detecting device for synchronizing an exposure timing sequence of an image detector with a light emitting timing sequence of a reference light source is disclosed. The method includes capturing a continued image set according to a predetermined period, analyzing intensity variation of the continued image set, and adjusting the exposure timing sequence of an image detector according to the intensity variation, so as to synchronize the exposure timing sequence of the image detector with the light emitting timing sequence of the reference light source.Type: GrantFiled: March 4, 2014Date of Patent: October 4, 2016Assignee: PixArt Imaging Inc.Inventors: Han-Ping Cheng, Chia-Cheun Liang, Ming-Tsan Kao
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Patent number: 9444987Abstract: An interactive imaging system includes an image system and a remote controller. The image system includes at least one reference beacon, a receiving unit and a host. The at least one reference beacon emits light in an emission pattern. The receiving unit is configured to receive a packet data. The host controls an enable time of the at least one reference beacon according to the packet data. The remote controller includes an image sensor and a transmission unit. The image sensor captures the light emitted from the at least one reference beacon at a sampling period. The transmission unit sends the packet data corresponding to the sampling period of the image sensor.Type: GrantFiled: June 28, 2013Date of Patent: September 13, 2016Assignee: PIXART IMAGING INCInventors: Chia-Cheun Liang, Chao-Chien Huang, Chi-Yang Huang, Wen-Yu Yang, Hung-Yu Lee