Patents by Inventor Chao-Hung Chang
Chao-Hung Chang 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: 8488357Abstract: Systems and methods for realizing reference currents to improve reliability of sensing operations of segmented semiconductor memory arrays have been achieved. Preferred embodiments of the invention comprise MRAM arrays but the invention could be applied to any other memories requiring access on small, segmented arrays. All embodiments of the invention comprise a folded bit lines scheme, either in adjacent bit lines or in segment-to-segment folded bit lines. In two embodiments alternate strapping of Poly-Si Word Lines in every second segment is achieved by metal layer of Read Word Line and Write Select Line. An embodiment has stored 1 and 0 cells on both sides of a selected segment to be read.Type: GrantFiled: October 22, 2010Date of Patent: July 16, 2013Assignee: MagIC Technologies, Inc.Inventors: Toshio Sunaga, Lejan Pu, Perng-Fei Yuh, Chao-Hung Chang
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Patent number: 8463678Abstract: The invention is to provide a generating method for transaction models with indicators for option. The method comprises: (S1) collecting a variety of indicators from the financial market; (S2) establishing an indicator pool saved with the indicators; (S3) distinguishing and classifying the indicators by Neural Network; (S4) determining a plurality of transaction models, the indicator of each transaction model in an independent classification; (S5) determining a date parameter for each indicator; (S6) deleting a part of the transaction models; (S7) determining a plurality of final transaction models from another transaction models; and (S8) determining a weight of each final transaction model.Type: GrantFiled: August 3, 2011Date of Patent: June 11, 2013Assignee: National Taiwan University of Science and TechnologyInventors: Chao-Hung Chang, Yen-Tseng Hsu, Jerome Yeh, Po-Lin Yeh, Yu-Tung Lin
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Patent number: 8368752Abstract: A size estimation method is used with a document camera to estimate an object size. The document camera includes a lens and an image sensor. The size estimation method includes the following steps. Firstly, an object distance between the lens and the object is detected. According to the object distance and a viewable angle of the lens, a shooting zone size is estimated. Then, the object is shot by the lens and the image sensor, thereby acquiring a digital image including an image of the object. Then, an effective pixel number corresponding to the object image is counted. Afterward, the size of the object is estimated according to the effective pixel number, a total pixel number of the image sensor and the shooting zone size.Type: GrantFiled: December 28, 2010Date of Patent: February 5, 2013Assignee: Avermedia Information, Inc.Inventors: Shi-Qiang Lin, Yu-Shan Huang, Chao-Hung Chang, Hsuan-Hung Liu
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Publication number: 20120290501Abstract: The invention is to provide a generating method for transaction models with indicators for option. The method comprises: (S1) collecting a variety of indicators from the financial market; (S2) establishing an indicator pool saved with the indicators; (S3) distinguishing and classifying the indicators by Neural Network; (S4) determining a plurality of transaction models, the indicator of each transaction model in an independent classification; (S5) determining a date parameter for each indicator; (S6) deleting a part of the transaction models; (S7) determining a plurality of final transaction models from another transaction models; and (S8) determining a weight of each final transaction model.Type: ApplicationFiled: August 3, 2011Publication date: November 15, 2012Inventors: Chao-Hung Chang, Yen-Tseng Hsu, Jerome Yeh, Po-Lin Yeh, Yu-Tung Lin
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Patent number: 8217684Abstract: Systems and methods for realizing current drivers without current or voltage feedback for devices that require accurate current drive with zero standby current has been disclosed. In a preferred embodiment of the invention this current driver is applied for write circuits for MRAMs. A fast and accurate reference current is generated by diode voltage divided by resistor without any feedback. The diode current is not fed back from the reference current. The diode current is generated from a regulated voltage. Temperature compensation of the write current is inherently built in the diode current reference. Fine-tuning of the temperature coefficient is achieved by mixing poly and diffusion resistors. A switch inserted in the current driver can turn on the driver fast and without a need for standby current. Leading boost in the current driver can fast charge the large coupling capacitance of word and bit lines and speed up write timing.Type: GrantFiled: October 12, 2010Date of Patent: July 10, 2012Assignee: MagIC Technologies, Inc.Inventors: Perng-Fei Yuh, Pokang Wang, Lejan Pu, Minh Tran, Chao-Hung Chang
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Publication number: 20120099358Abstract: Systems and methods for realizing reference currents to improve reliability of sensing operations of segmented semiconductor memory arrays have been achieved. Preferred embodiments of the invention comprise MRAM arrays but the invention could be applied to any other memories requiring access on small, segmented arrays. All embodiments of the invention comprise a folded bit lines scheme, either in adjacent bit lines or in segment-to-segment folded bit lines. In two embodiments alternate strapping of Poly-Si Word Lines in every second segment is achieved by metal layer of Read Word Line and Write Select Line. An embodiment has stored 1 and 0 cells on both sides of a selected segment to be read.Type: ApplicationFiled: October 22, 2010Publication date: April 26, 2012Inventors: Toshio Sunaga, Lejan Pu, Perng-Fei Yuh, Chao-Hung Chang
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Publication number: 20120086476Abstract: Systems and methods for realizing current drivers without current or voltage feedback for devices that require accurate current drive with zero standby current has been disclosed. In a preferred embodiment of the invention this current driver is applied for write circuits for MRAMs. A fast and accurate reference current is generated by diode voltage divided by resistor without any feedback. The diode current is not fed back from the reference current. The diode current is generated from a regulated voltage. Temperature compensation of the write current is inherently built in the diode current reference. Fine-tuning of the temperature coefficient is achieved by mixing poly and diffusion resistors. A switch inserted in the current driver can turn on the driver fast and without a need for standby current. Leading boost in the current driver can fast charge the large coupling capacitance of word and bit lines and speed up write timing.Type: ApplicationFiled: October 12, 2010Publication date: April 12, 2012Inventors: Perng-Fei Yuh, Pokang Wang, Lejan Pu, Minh Tran, Chao-Hung Chang
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Publication number: 20110157407Abstract: A size estimation method is used with a document camera to estimate an object size. The document camera includes a lens and an image sensor. The size estimation method includes the following steps. Firstly, an object distance between the lens and the object is detected. According to the object distance and a viewable angle of the lens, a shooting zone size is estimated. Then, the object is shot by the lens and the image sensor, thereby acquiring a digital image including an image of the object. Then, an effective pixel number corresponding to the object image is counted. Afterward, the size of the object is estimated according to the effective pixel number, a total pixel number of the image sensor and the shooting zone size.Type: ApplicationFiled: December 28, 2010Publication date: June 30, 2011Applicant: AVERMEDIA INFORMATION, INC.Inventors: Shi-Qiang Lin, Yu-Shan Huang, Chao-Hung Chang, Hsuan-Hung Liu
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Patent number: 7761744Abstract: The invention provides a debugging method applicable for an embedded system. The system includes a processor, a main memory and a debugging interface. A debugging program is first provided in the main memory. A debugging interruption is subsequently triggered to cause the processor to read the debugging program from the main memory and execute the debugging program. After execution, an execution result of the debugging program is stored into the main memory. The execution result is read and output via the debugging interface for further analysis. Because the architecture does not require a scan chain of ITR 104, the circuit requirement is reduced while performance is increased.Type: GrantFiled: May 14, 2007Date of Patent: July 20, 2010Assignee: Industrial Technology Research InstituteInventors: Chao-Hung Chang, Po-Chou Chen, Ming-Lun Liu
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Patent number: 7574131Abstract: An object detection system and method is applied to an active surveillance system for detecting at least one target object appeared in an area of interest. The object detection system includes a processor for defining the area of interest into at least a first and a second zone; a controller for assigning a first and a second weight to the first and the second zone, respectively, wherein the first weight is higher than the second weight; and a first image capturing device for capturing an image of the target object appeared in the first zone prior to capturing an image of the target object appeared in the second zone. With these arrangements, the detection of at least one target object appeared in more than one zone having a specific weight assigned thereto may be implemented with improved efficiency and accuracy in object selection and reduced interferences from environmental variables.Type: GrantFiled: March 29, 2006Date of Patent: August 11, 2009Assignee: Sunvision Scientific Inc.Inventors: Chao-Hung Chang, Tain-Tzu Chang, Chow-Ing Chang
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Publication number: 20080229141Abstract: The invention provides a debugging method applicable for an embedded system. The system includes a processor, a main memory and a debugging interface. A debugging program is first provided in the main memory. A debugging interruption is subsequently triggered to cause the processor to read the debugging program from the main memory and execute the debugging program. After execution, an execution result of the debugging program is stored into the main memory. The execution result is read and output via the debugging interface for further analysis. Because the architecture does not require a scan chain of ITR 104, the circuit requirement is reduced while performance is increased.Type: ApplicationFiled: May 14, 2007Publication date: September 18, 2008Inventors: Chao-Hung Chang, Po-Chou Chen, Ming-Lun Liu
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Publication number: 20080180520Abstract: A system and method for variable-resolution image saving includes an image capturing member, a data saving member, and an image data processor. A first panoramic image data is captured by the image capturing member in high resolution. The image data is then analyzed and divided into target area and background area. The resolution of background area is lowered to reduce the size of image data. A second panoramic image is then formed with the target area in original high resolution and background area in lower resolution. In this way, memory size and time required for storing and transmitting the second panoramic image data are greatly reduced without loosing important features of the target area.Type: ApplicationFiled: January 26, 2007Publication date: July 31, 2008Inventors: Chao-Hung Chang, Tain-Tzu Chang, Chow-Ing Chang
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Publication number: 20070230943Abstract: An object detection system and method is applied to an active surveillance system for detecting at least one target object appeared in an area of interest. The object detection system includes a processor for defining the area of interest into at least a first and a second zone; a controller for assigning a first and a second weight to the first and the second zone, respectively, wherein the first weight is higher than the second weight; and a first image capturing device for capturing an image of the target object appeared in the first zone prior to capturing an image of the target object appeared in the second zone. With these arrangements, the detection of at least one target object appeared in more than one zone having a specific weight assigned thereto may be implemented with improved efficiency and accuracy in object selection and reduced interferences from environmental variables.Type: ApplicationFiled: March 29, 2006Publication date: October 4, 2007Applicant: Sunvision Scientific Inc.Inventors: Chao-Hung Chang, Tain-Tzu Chang, Chow-Ing Chang
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Patent number: 7025470Abstract: An improved mechanism for rotatable image taking device, the rotatable mirror set in front of a fixed image-taking device with angle of reflection controlling mechanism at the rear side of the mirror. The mechanism includes a fixed rod with universal joint at the center, a horizontal rotating rod with universal joint, and a vertical rotating rod with universal joint. There are also three universal joints situated at the center, upper or lower side, and left or right side of the back face of the mirror. The invention can reduce the total cost of the rotatable image-taking device and improve the speed of changing angles.Type: GrantFiled: July 19, 2004Date of Patent: April 11, 2006Inventor: Chao-Hung Chang
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Publication number: 20060028547Abstract: The present invention relates to an integrated active surveillance system, which can automatically identify targets of interest, take the magnified images of such targets, and store and transmit the images to remote monitors. The system contains: one image-taking device, which includes one camera module to take the wide-angle image of the surveillance area and magnified narrow-angle images of targets of interest; one image process device, which is connected to the image-taking device, screening wide-angle images to search for the targets of interest, and the magnified images of the targets are taken; one memory device, which is connected to the image process device, saving both the wide-angle images and magnified images; one transmitting device, which is connected to the memory device, transmitting image data to at least one remote monitor; and one control device, which is connected to all devices mentioned above, to coordinate the image-taking directions, image data processing, storing, and transmitting.Type: ApplicationFiled: August 4, 2004Publication date: February 9, 2006Inventor: Chao-Hung Chang
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Publication number: 20060012900Abstract: An improved mechanism for rotatable image taking device, the rotatable mirror set in front of a fixed image-taking device with angle of reflection controlling mechanism at the rear side of the mirror. The mechanism includes a fixed rod with universal joint at the center, a horizontal rotating rod with universal joint, and a vertical rotating rod with universal joint. There are also three universal joints situated at the center, upper or lower side, and left or right side of the back face of the mirror. The invention can reduce the total cost of the rotatable image-taking device and improve the speed of changing angles.Type: ApplicationFiled: July 19, 2004Publication date: January 19, 2006Inventor: Chao-Hung Chang
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Publication number: 20060007307Abstract: The present invention relates to a system and method for partial image saving. The system contains at least one image-taking device, and one digital data saving and process device, which is connected to said image-taking device for receiving and process the latest image data. The digital data saving and process device contains at least one data saving device, and one image data process device. The data saving device contains at least one temporary data file, and at least one long-term data file. The latest complete image data taken by the image-taking device is first stored in the temporary data file. The image data process device will then identify targets of interest, within the complete image area, based on user-defined criteria. The image data around the targets of interest are finally stored in the long-term data file. The temporary data file will then be empty, ready for next image data.Type: ApplicationFiled: July 12, 2004Publication date: January 12, 2006Inventor: Chao-Hung Chang
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Publication number: 20040189801Abstract: An active video surveillance system and active video surveillance method therefore of the present invention mainly is provided to continuously taking the wide-angle image signals within a surveillance area by an image-taking device, and a processing device is employed for continuously comparing the latest and the second latest wide-angle image signals. Then, a moving target is identified when a difference occur there between and the image-taking device or a second image-taking device is immediately driven to take the enlarged image signals of the moving target, and the said wide-angle image signals and the said enlarged image signals are recorded into a recording unit. By using the above-mentioned design, the video surveillance system is able to enhance the definition and identification capability of specific moving targets.Type: ApplicationFiled: March 28, 2003Publication date: September 30, 2004Inventor: Chao-Hung Chang
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Patent number: 6002604Abstract: A 5V generator circuit is disclosed that generates a reliable 5V signal for use in integrated circuits from the available VPP or VCC supplies for a wide range of VPP and VCC voltages. When VCC is greater than approximately 4V, the generator circuit generates the 5V signal directly from VCC. When VCC is less than approximately 4V and VPP is greater than approximately 4V but less than about 9V, the generator circuit generates the 5V signal directly from VPP. When VCC is less than approximately 4V and VPP is greater than approximately 9V, the generator produces the 5V signal at approximately half of the voltage level of the VPP signal. When both VCC and VPP are less than about 4V, the 5V signal is generated at the too-low VCC level.Type: GrantFiled: November 10, 1997Date of Patent: December 14, 1999Assignee: Integrated Silicon Solution, Inc.Inventors: Julia Shau-Chang Chan, Chao-Hung Chang, Paul Jei-Zen Song