Patents by Inventor Chien-Nan Yu

Chien-Nan Yu 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: 8917878
    Abstract: A microphone inspection method includes the following steps. Firstly, a sound wave from a speaker is received by an under-test microphone and a reference microphone. Consequently, a first characteristic point distribution chart and a second characteristic point distribution chart are created, respectively. Each of the first characteristic point distribution chart and the second characteristic point distribution chart includes plural characteristic points corresponding to respective normalized frequency values. Then, a characteristic point number difference between a number of the characteristic points of the first characteristic point distribution chart and a number of the characteristic points of the second characteristic point distribution chart within a specified normalized frequency value range is calculated. Consequently, the quality of the under-test microphone is judged according to the characteristic point number difference.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: December 23, 2014
    Assignee: Primax Electronics Ltd.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Patent number: 8736686
    Abstract: An optical analysis method is provided for judging whether a lens and a sensing element of an image pickup device are parallel with each other. The method utilizes a tested image pickup device and a standard image pickup device to shoot an object at the same fixed shooting position to acquire a standard image frame and a tested image frame. According to the difference between the position coordinate value or the area of at least one mark of the standard image frame and the tested image frame, the method can judge whether the tested lens and the tested sensing element of the tested image pickup device are parallel with each other.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: May 27, 2014
    Assignee: Primax Electronics Ltd.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Publication number: 20140029753
    Abstract: A microphone inspection method includes the following steps. Firstly, a sound wave from a speaker is received by an under-test microphone and a reference microphone. Consequently, a first characteristic point distribution chart and a second characteristic point distribution chart are created, respectively. Each of the first characteristic point distribution chart and the second characteristic point distribution chart includes plural characteristic points corresponding to respective normalized frequency values. Then, a characteristic point number difference between a number of the characteristic points of the first characteristic point distribution chart and a number of the characteristic points of the second characteristic point distribution chart within a specified normalized frequency value range is calculated. Consequently, the quality of the under-test microphone is judged according to the characteristic point number difference.
    Type: Application
    Filed: October 24, 2012
    Publication date: January 30, 2014
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Patent number: 8510938
    Abstract: The present invention discloses a method for assembling a camera module. The method includes putting plural conductive bumps on a conductive contact of a substrate such that a large conductive bump is formed, and pressing the substrate and an image chip together such that the conductive contact contacts with a pad formed on the image chip through the large conductive bump to combine the conductive contact and the pad. Since there is no contact between the substrate and the image chip but the large conductive bump, the method decreases the probability for fracture between the substrate and the image chip and improves the quality of the camera module.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: August 20, 2013
    Assignee: Primax Electronics, Ltd.
    Inventors: Chien-Nan Yu, Chung-Feng Tsao, Hang-Kau Khor, Wen-Chi Shih, Ying-Chieh Chen, Yu-Hsiao Li
  • Patent number: 8432453
    Abstract: A method of starting snapping a static scene is applied to a system, which is electrically connected with an image-capturing device and a display device. The display device has a displaying zone for display a visual field of the image-capturing device. After an instruction of setting a block in the displaying zone is received by the system, a skin color coverage percentage of the block is calculated. According to the skin color coverage percentage, the system determines whether the scene within the visual field is stored or not. By the method and system of the present invention, a self-timer function is activated according to the skin color.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: April 30, 2013
    Assignee: Primax Electronics, Ltd.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Patent number: 8368872
    Abstract: A method for determining the planting ball number of a camera module is provided. The camera module includes a substrate and a chip. The substrate includes an opening and a plurality of contact pads. The opening of the substrate has four rims. The method includes the following steps. Firstly, an image pickup device is used to detect an average contact pad distance of the distances from four specified contact pads of the substrate to the image pickup device. Then, a smallest opening distance among four opening distances from the four rims to the image pickup device is acquired. Then, plural actual contact pad distances from all contact pads to the image pickup device are acquired. The planting ball number for each contact pad is calculated according to these distances. Consequently, the quality of assembling the camera module is enhanced.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: February 5, 2013
    Assignee: Primax Electronics Ltd.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Publication number: 20130016334
    Abstract: A method for determining the planting ball number of a camera module is provided. The camera module includes a substrate and a chip. The substrate includes an opening and a plurality of contact pads. The opening of the substrate has four rims. The method includes the following steps. Firstly, an image pickup device is used to detect an average contact pad distance of the distances from four specified contact pads of the substrate to the image pickup device. Then, a smallest opening distance among four opening distances from the four rims to the image pickup device is acquired. Then, plural actual contact pad distances from all contact pads to the image pickup device are acquired. The planting ball number for each contact pad is calculated according to these distances. Consequently, the quality of assembling the camera module is enhanced.
    Type: Application
    Filed: October 24, 2011
    Publication date: January 17, 2013
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Publication number: 20120300199
    Abstract: An optical analysis method is provided for judging whether a lens and a sensing element of an image pickup device are parallel with each other. The method utilizes a tested image pickup device and a standard image pickup device to shoot an object at the same fixed shooting position to acquire a standard image frame and a tested image frame. According to the difference between the position coordinate value or the area of at least one mark of the standard image frame and the tested image frame, the method can judge whether the tested lens and the tested sensing element of the tested image pickup device are parallel with each other.
    Type: Application
    Filed: July 28, 2011
    Publication date: November 29, 2012
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Patent number: 8189942
    Abstract: A focus-quality judging method includes the following steps. Firstly, a comparing object including a target area is provided. A reference image pickup device is provided to shoot the comparing object to obtain a standard image including a standard target area image. Then, a first pixel number contained in the standard target area image is counted. The comparing object is shot by a test image pickup device to obtain a test image including a test target area image, wherein the test image has the same resolution as the standard image. Then, a second pixel number contained in the test target area image is counted. The first pixel number contained in the standard target area image is compared with the second pixel number contained in the test target area image. According to the comparing results, it is discriminated whether the test image pickup device performs an accurate focusing operation.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: May 29, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Chien-Nan Yu, Szu-Hao Lyu
  • Patent number: 8169532
    Abstract: A portable electronic device for measuring a distance of an object by performing an auto focus function and a distance measuring method are provided. The portable electronic device includes an image pickup module and a distance measuring program. The image pickup module includes a lens, an optical sensing element and a transmission mechanism. The distance measuring program includes a distance look-up table. The distance look-up table is established by correlating a plurality of lens moving step numbers with corresponding object distance values. The auto focus function is performed to capture an image of an object by the image pickup module, thereby obtaining a current lens moving step number required for performing the auto focus function. A current object distance value corresponding to the current lens moving step number is acquired according to the distance look-up table.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: May 1, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Publication number: 20120084976
    Abstract: The present invention discloses a method for assembling a camera module. The method includes putting plural conductive bumps on a conductive contact of a substrate such that a large conductive bump is formed, and pressing the substrate and an image chip together such that the conductive contact contacts with a pad formed on the image chip through the large conductive bump to combine the conductive contact and the pad. Since there is no contact between the substrate and the image chip but the large conductive bump, the method decreases the probability for fracture between the substrate and the image chip and improves the quality of the camera module.
    Type: Application
    Filed: November 22, 2010
    Publication date: April 12, 2012
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventors: Chien-Nan Yu, Chung-Feng Tsao, Hang-Kau Khor, Wen-Chi Shih, Ying-Chieh Chen, Yu-Hsiao Li
  • Publication number: 20120013747
    Abstract: An image testing method of an image pickup device and an image testing apparatus using such a method are provided. The image testing apparatus is in communication with the image pickup device. The image testing apparatus includes an image processing program, a multi-core processing unit and a storage unit. The image processing program is used for segmenting the main image, which is acquired by the image pickup device, into plural sub-image blocks, and transmitting the sub-image blocks to respective threads. The multi-core processing unit is used for synchronously executing the threads, thereby synchronously analyzing imaging quality of respective sub-image blocks. The storage unit is used for storing analyzing results of respective sub-image blocks. The analyzing results of respective sub-image blocks stored in the storage unit are combined together by the multi-core processing unit, thereby acquiring the imaging quality of the main image.
    Type: Application
    Filed: October 20, 2010
    Publication date: January 19, 2012
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Patent number: 8077254
    Abstract: A portable camera having a lens assembly switching mechanism is provided. The portable camera includes a camera main body, a camera module, a slab module and a coupling structure. The camera main body has a camera opening formed in a first surface thereof. The camera module is disposed within the camera main body and includes a lens assembly exposed through the camera opening. The slab module is used for carrying one or more selective lens assemblies with different shooting angles. The coupling structure is disposed between the first surface of camera main body and the camera module. The slab module is movable with respect to the coupling structure while the slab module is parallel with the first surface of the camera main body, so that one of the selective lens assemblies is aligned with the camera opening for providing an adjustable shooting angle.
    Type: Grant
    Filed: January 5, 2009
    Date of Patent: December 13, 2011
    Assignee: Primax Electronics Ltd.
    Inventor: Chien-Nan Yu
  • Publication number: 20110223705
    Abstract: A process for assembling a camera module is provided. Firstly, a first conductive bump and a second conductive bump are placed on a signal terminal of a substrate and a contact pad of an image sensing chip, respectively. Then, the substrate and the image sensing chip are laminated, so that the first conductive bump and the second conductive bump are combined together and the signal terminal of the substrate and the contact pad of the image sensing chip are electrically connected with each other. Then, an underfill is applied to a region between the substrate and the image sensing chip. Since the two conductive bumps are connected with each other by the assembling process, the quality of the camera module of the present invention is enhanced.
    Type: Application
    Filed: August 2, 2010
    Publication date: September 15, 2011
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventors: Chien-Nan Yu, Chung-Feng Tsao, Ying-Chieh Chen, Szu-Hao Lyu, Ching-Lung Jao, Hang-Kau Khor
  • Publication number: 20110157376
    Abstract: A method of starting snapping a static scene is applied to a system, which is electrically connected with an image-capturing device and a display device. The display device has a displaying zone for display a visual field of the image-capturing device. After an instruction of setting a block in the displaying zone is received by the system, a skin color coverage percentage of the block is calculated. According to the skin color coverage percentage, the system determines whether the scene within the visual field is stored or not. By the method and system of the present invention, a self-timer function is activated according to the skin color.
    Type: Application
    Filed: April 16, 2010
    Publication date: June 30, 2011
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Patent number: 7949240
    Abstract: A portable camera device includes a first casing, a second casing and an extendable mechanism. The second casing contains a lens module and has a lower part connected to a first connecting position of the first casing such that the lens module is arranged above the first casing. The extendable mechanism has a rear end with a document holding structure for holding a document and a front end connected to a second connecting position of the first casing via a first pivotal mechanism. The extendable mechanism is selectively folded or unfolded with respect to the first casing when the extendable mechanism is rotated in various directions by adjusting the first pivotal mechanism. A relative spatial correlation between the lens module and the document is adjusted such that the lens module is focused on a selected area of the document for capturing an image of the document.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: May 24, 2011
    Assignee: Primax Electronics Ltd.
    Inventors: Chien-Nan Yu, Szu-Hao Lyu
  • Publication number: 20110115924
    Abstract: An image pickup device is connected with a computer. A video program is installed in the computer. The image pickup device includes an image pickup module and a monitor program. The image pickup module is controlled by the video program to capture an image. The image pickup module includes a lens and a shielding cover in front of the lens. When the monitor program detects an execution status of the video program, the shielding cover is driven to move to a position where the lens is not shielded by the shielding cover. When the monitor program detects a non-execution status of the video program, the shielding cover is driven to move to a position where the lens is shielded by the shielding cover.
    Type: Application
    Filed: February 9, 2010
    Publication date: May 19, 2011
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventors: Chien-Nan Yu, Szu-Hao Lyu
  • Patent number: 7944684
    Abstract: A notebook computer that has a document holding function includes an upper cover and a base. The upper cover includes a screen and an image pickup device. The base includes a keyboard and a touchpad. A touchpad chassis is disposed under the touchpad and connected with a bottom surface of the touchpad. A fixing recess is formed in an edge surface of the touchpad chassis for holding the document. A rotatable frame is disposed under the touchpad for overturning the touchpad chassis. As such, a shooting angle is defined between the image pickup device and the document held in the fixing recess.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: May 17, 2011
    Assignee: Primax Electronics Ltd.
    Inventor: Chien-Nan Yu
  • Publication number: 20110075017
    Abstract: A portable electronic device for measuring a distance of an object by performing an auto focus function and a distance measuring method are provided. The portable electronic device includes an image pickup module and a distance measuring program. The image pickup module includes a lens, an optical sensing element and a transmission mechanism. The distance measuring program includes a distance look-up table. The distance look-up table is established by correlating a plurality of lens moving step numbers with corresponding object distance values. The auto focus function is performed to capture an image of an object by the image pickup module, thereby obtaining a current lens moving step number required for performing the auto focus function. A current object distance value corresponding to the current lens moving step number is acquired according to the distance look-up table.
    Type: Application
    Filed: November 12, 2009
    Publication date: March 31, 2011
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Publication number: 20110037889
    Abstract: A method for determining whether an auto-focus operation is re-executed and an image pickup device using such a method are provided. The image pickup device includes an image sensor, a register and a back-end chip. According to the automatic exposure value change amount and the automatic gain value change amount in a focusing environment, the back-end chip determines whether the auto-focus operation is re-executed.
    Type: Application
    Filed: November 12, 2009
    Publication date: February 17, 2011
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu