Patents by Inventor Chun Kit Hung
Chun Kit Hung 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: 20240065596Abstract: A method and system for detecting short-term stress of a subject person and generating alerts in an indoor environment are disclosed. The system may receive data on the subject person's heart rate, galvanic skin response, and accelerometer movement from a wearable device, and also capture image frames through a camera. After that, the system may perform bio-signal analysis in accordance with the heart rate and the galvanic skin response data, and perform skeletal motion analysis in accordance with the image frames. Based on bio-signal index and skin conductance index generated from the bin-signal analysis and skeletal motion analysis respectively, the system may perform data fusion to determine the short-term stress.Type: ApplicationFiled: August 31, 2022Publication date: February 29, 2024Inventors: Chun Kit HUNG, Fu Tuen LEUNG, Ka Fai SUK, Kar-Wing Edward LOR
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Patent number: 8514166Abstract: A method of reducing power consumption in a liquid crystal display illuminated by a backlight device includes dimming the backlight and adjusting the intensity of the image to compensate for the dimmed backlight. A dimming factor for the backlight is based on a clipping point determining from the pixel intensity distribution of the image signal. The intensity of the image is adjusted based on the dimming factor, wherein a first tone mapping function is used to adjust pixel intensities below an intensity threshold and a second tone mapping function is used to adjust pixel intensities above the intensity threshold.Type: GrantFiled: May 29, 2008Date of Patent: August 20, 2013Assignee: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Min Chen, Huajun Peng, Guoping Qiu, Chun Kit Hung, Wei Zhang
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Patent number: 8400385Abstract: A method and apparatus for image enhancement in a display illuminated by a lighting device. Enhancement is via use of a non-linear mapping function. An illumination level for the lighting device is determined and used with the mapping function to find a compensation factor for each pixel of the image. The brightness property of each pixel is adjusted by its compensation factor.Type: GrantFiled: December 21, 2007Date of Patent: March 19, 2013Assignee: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Huajun Peng, Wei Zhang, Chun Kit Hung
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Patent number: 8243007Abstract: An image display device is presented to solve problems of high power consumption, insufficient contrast, image flicker, and distortion of image display devices. The image display device includes an image display management module which includes a backlight control unit. The backlight control unit includes an image brightness analyzer, generating a brightness value according to an input image data; a weight generator, generating a weight according to the brightness value; an image variation analyzer, analyzing the input image data to generate an image variance; and a backlight factor generator, coupled to the weight generator and the image variation analyzer to generate a backlight adjusting signal according to the weight and the image variance. By the backlight adjusting signal, the image display device achieves the power-saving and contrast enhancement effects.Type: GrantFiled: May 22, 2008Date of Patent: August 14, 2012Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventors: Wei Zhang, Huajun Peng, Chen-Jung Tsai, Chun-Kit Hung
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Publication number: 20090295705Abstract: A method of reducing power consumption in a liquid crystal display illuminated by a backlight device includes dimming the backlight and adjusting the intensity of the image to compensate for the dimmed backlight. A dimming factor for the backlight is based on a clipping point determining from the pixel intensity distribution of the image signal.Type: ApplicationFiled: May 29, 2008Publication date: December 3, 2009Inventors: Min CHEN, Huajun PENG, Guoping QIU, Chun Kit HUNG, Wei ZHANG
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Publication number: 20090167670Abstract: A controller for a backlight for a liquid crystal display (LCD) panel has at least two methods for determining illumination value for the backlight. The controller selects between the two methods based on properties of the image being displayed. The properties of the image include its color and its intensity.Type: ApplicationFiled: December 26, 2007Publication date: July 2, 2009Applicant: HONG KONG APPLIED SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE COMPANY LIMITEDInventors: Huajun Peng, Wei Zhang, Chen-Jung Tsai, Chun Kit Hung
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Publication number: 20090160877Abstract: A method and apparatus for image enhancement in a display illuminated by a lighting device. Enhancement is via use of a non-linear mapping function. An illumination level for the lighting device is determined and used with the mapping function to find a compensation factor for each pixel of the image. The brightness property of each pixel is adjusted by its compensation factor.Type: ApplicationFiled: December 21, 2007Publication date: June 25, 2009Applicant: HONG KONG APPLIED SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE COMPANY LIMITEDInventors: Huajun Peng, Wei Zhang, Chun Kit Hung
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Publication number: 20090122001Abstract: An LCD display apparatus arranged to display image on an image display surface at an image frame rate of M image frames per second, the apparatus including a backlight arrangement comprising an LED backlight device for providing backlight illumination to said image display surface and a backlight controller for controlling the generation of backlight and intensity distribution of backlight illumination on said image display surface; wherein the backlight controller comprises a processor configured to generate a set of backlight illumination data with reference to the intensity distribution characteristics of the image content of said image frame according to a predetermined relationship, wherein said set of backlight illumination data contains information on the required intensity distribution of backlight on said image display surface for said image frame; and to generate a plurality of backlight illumination frames for each said image frame during the duration of said image frame based on said set of backliType: ApplicationFiled: November 9, 2007Publication date: May 14, 2009Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventors: Yuk Lung Cheung, Kwan Wah Ng, Chen Jung Tsai, Huajun Peng, Chun Kit Hung
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Patent number: 7518536Abstract: A debinarizer and a hardware-based method for debinarizing a binary bit stream into symbols comprising predefined binary sequences are disclosed in which predefined binary sequences and their corresponding symbols are represented as tree structures. A binary sequence is debinarized by traversing one of the tree structures to determine a corresponding symbol. Similar tree structures may be combined to form a single tree structure. The tree structures may be implemented as a finite state machine.Type: GrantFiled: March 30, 2007Date of Patent: April 14, 2009Assignee: Hong Kong Applied Science and Technology Research Institute Co. Ltd.Inventors: Chun Kit Hung, Kin Wing Au, Bojun Meng
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Publication number: 20080291153Abstract: An image display device is presented to solve problems of high power consumption, insufficient contrast, image flicker, and distortion of image display devices. The image display device includes an image display management module which includes a backlight control unit. The backlight control unit includes an image brightness analyzer, generating a brightness value according to an input image data; a weight generator, generating a weight according to the brightness value; an image variation analyzer, analyzing the input image data to generate an image variance; and a backlight factor generator, coupled to the weight generator and the image variation analyzer to generate a backlight adjusting signal according to the weight and the image variance. By the backlight adjusting signal, the image display device achieves the power-saving and contrast enhancement effects.Type: ApplicationFiled: May 22, 2008Publication date: November 27, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co. Ltd.Inventors: Wei Zhang, Huajun Peng, Chen-Jung Tsai, Chun-Kit Hung
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Patent number: 7443318Abstract: Disclosed is a context modeller (103) used in decoding data (202) encoded using Context Adaptive Binary Arithmetic Coding, said context modeler (103) comprising a Read Only Memory (1001) for storing uninitialized context model values, said uninitialized context model values being stored in the Read Only Memory (1001) in a manner that enables a plurality of uninitialized context model values to be read from the Read Only Memory (1001) in a single clock cycle, an Arithmetic Logic Module (1003) comprising a plurality of parallel processing paths (2202-2207), each said processing path comprising a plurality of pipeline stages, a Random Access Memory (1005) and a memory controller (1008) for determining, using the Arithmetic Logic Module (1005) operating on said plurality of uninitialized context model values read from the Read Only Memory (1001) in each clock cycle, initialized context model values for storage in the Random Access Memory (1001) based upon header information in said incoming encoded data (202).Type: GrantFiled: March 30, 2007Date of Patent: October 28, 2008Assignee: Hong Kong Applied Science and Technology Research Institute Co. Ltd.Inventors: Chun Kit Hung, Kin Wing An
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Publication number: 20080240234Abstract: Disclosed is a context modeller (103) used in decoding data (202) encoded using Context Adaptive Binary Arithmetic Coding, said context modeler (103) comprising a Read Only Memory (1001) for storing uninitialized context model values, said uninitialized context model values being stored in the Read Only Memory (1001) in a manner that enables a plurality of uninitialized context model values to be read from the Read Only Memory (1001) in a single clock cycle, an Arithmetic Logic Module (1003) comprising a plurality of parallel processing paths (2202-2207), each said processing path comprising a plurality of pipeline stages, a Random Access Memory (1005) and a memory controller (1008) for determining, using the Arithmetic Logic Module (1005) operating on said plurality of uninitialized context model values read from the Read Only Memory (1001) in each clock cycle, initialized context model values for storage in the Random Access Memory (1001) based upon header information in said incoming encoded data (202).Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Inventors: Chun Kit Hung, Kin Wing An
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Publication number: 20080238731Abstract: A debinarizer and a hardware-based method for debinarizing a binary bit stream into symbols comprising predefined binary sequences are disclosed in which predefined binary sequences and their corresponding symbols are represented as tree structures. A binary sequence is debinarized by traversing one of the tree structures to determine a corresponding symbol. Similar tree structures may be combined to form a single tree structure. The tree structures may be implemented as a finite state machine.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Inventors: Chun Kit Hung, Kin Wing An, Bojun Meng