Patents by Inventor Chih-Kuang Chang

Chih-Kuang 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).

  • METHOD FOR SPLICING POINT CLOUDS TOGETHER
    Publication number: 20130314403
    Abstract: A computing device receives more than one point cloud. There are mark point clouds on each point cloud. The computing device fits each mark point cloud to an ellipse. A point cloud is selected and a group of the selected point cloud is taken as a first group. Each group of other point clouds is taken as a second group. The computing device aligns a second group to the first group and obtains a rotation matrix corresponding to the second group. The point cloud corresponding to the second group is aligned to the point cloud corresponding to the first group according to the rotation matrix.
    Type: Application
    Filed: May 6, 2013
    Publication date: November 28, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: CHIH-KUANG CHANG, XIN-YUAN WU, JIN-GANG RAO
  • ELECTRONIC DEVICE AND METHOD FOR SIMULATING THREE-DIMENSIONAL MODEL OF WORKPIECE
    Publication number: 20130307853
    Abstract: In a method for simulating a three-dimensional (3D) model of a workpiece using an electronic device, the method meshes a 3D model using triangles, and outputs a first sequence of triangles of the 3D model. The method further normalizes vertexes of each of the triangles in the first triangle sequence, and obtains a meshed model of the workpiece. A 2D image of the workpiece is divided and a second sequence of triangles of the divided 2D image is obtained. The method further traverses the second sequence of triangles and obtains a pixel set and vertex coordinates of each of the triangles in the second sequence, and electronically pastes each of the triangles in the second sequence to a corresponding position in the meshed 3D model. The pasted 3D model is displayed on a display device.
    Type: Application
    Filed: April 24, 2013
    Publication date: November 21, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: CHIH-KUANG CHANG, XIN-YUAN WU, LU YANG
  • Computing device and method for analyzing profile tolerances of products
    Patent number: 8588507
    Abstract: A computing device reads pixels of an image of a product along an x-direction and a y-direction of the image. In response to reading two neighboring pixels having different color values, the device regards one pixel having a predetermined color value from the two neighboring pixels as a profile point of the image, to generate one or more point-clouds consisting of all profile points of the image. Furthermore, the device reads one or more theoretical profile curves of the product from the storage device, aligns the one or more point-clouds and the one or more theoretical profile curves, and determines a minimum distance from each profile point in the one or more point-clouds to the one or more adjusted theoretical profile curves. A profile tolerance of the product is then determined according to a maximum value and a minimum value of the minimum distances.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: November 19, 2013
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chih-Kuang Chang, Xin-Yuan Wu
  • Electronic device and method for meshing curved surface
    Patent number: 8587586
    Abstract: In a method for creating a mesh over a curved surface of an electronic model of an object using an electronic device, sampled points of a boundary line of the electronic model of the object are obtained. The method stores the sampled points of the boundary line in a linked list, obtains sampled points of the curved surface of the electronic model of the object, stores the sampled points of the curved surface in a first queue, and inserts each point stored in the linked list into the first queue. The method further divides a parameter plane of the curved surface into small boxes, determines intersection points of the vertical lines of the parameter plane and the boundary line, and generates triangles by connecting the intersection points, the sampled points of the boundary line, and the curved surface in each small box.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: November 19, 2013
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chih-Kuang Chang, Xin-Yuan Wu
  • COMPUTING DEVICE AND METHOD OF MEASURING SURFACE DIMENSIONS OF OBJECTS
    Publication number: 20130289937
    Abstract: In a method for measuring surface dimension of an object, an enclosing box of a triangular mesh surface of the object is constructed, and divided into sub-boxes. Relationships between the triangles and the sub-boxes are generated according to intersections. A measuring point is selected, and coordinates and a searching vector of the measuring point are obtained. A ray, which starts from the selected measuring point along the direction where the searching vector is directed to, is constructed, and sub-boxes intersecting with the ray are obtained sequentially. One of the obtained sub-boxes is selected and triangles which intersect with the selected sub-box are obtained. An intersection point of the ray and one of the obtained triangles, and a vector of the obtained triangle are recorded into a measuring file. Measurements on the surface of the object are implemented according to the measuring file.
    Type: Application
    Filed: April 16, 2013
    Publication date: October 31, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD
    Inventors: CHIH-KUANG CHANG, XIN-YUAN WU, LU YANG
  • SYSTEM AND METHOD FOR TEMPERATURE COMPENSATION OF MEASUREMENT MACHINE
    Publication number: 20130289917
    Abstract: A computing device connects with a measurement machine. The measurement machine includes a raster ruler and a measurement unit. The computing device reads environmental temperatures from a temperature sensor. Compensation coefficients of the standard workpiece and compensation coefficients of the raster ruler are calculated. The computing device calculates total compensation coefficients of the standard workpiece and the raster ruler. When the measurement machine measures an object workpiece, the computing device calculates a total error of the object workpiece according to the total compensation coefficients of the standard workpiece and the total compensation coefficients of the raster ruler. Coordinates of the object workpiece are calculated according to the total error and mechanism coordinates of each axis of the measurement machine.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 31, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: CHIH-KUANG CHANG, HUA-WEI YANG
  • COMPUTING DEVICE AND METHOD FOR SIMULATING MEASUREMENT PATH OF PROBE OF MEASUREMENT MACHINE
    Publication number: 20130289954
    Abstract: In a method for simulating a measurement path of a probe using a computing device, a standard ball is constructed by meshing shell surface points. Measurement points from the surface of the standard ball are selected, and a coordinate value of each of the measurement points is calculated. The method calculates a coordinate value of each moving point of the probe, and inserts the coordinate value of each moving point between the two adjacent measurement points into the data array. The method simulates probe movement path of the probe according to coordinate values stored in the data array, and detects any collision between the probe and the standard ball at each point of the probe movement path. A probe calibration program is generated according to the probe movement path when no collisions with the standard ball is found.
    Type: Application
    Filed: April 9, 2013
    Publication date: October 31, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: CHIH-KUANG CHANG, XIN-YUAN WU, WEI WANG
  • COMPUTING DEVICE AND METHOD OF COMPENSATING PRECISION OF MEASUREMENTS USING PROBES OF THREE-DIMENSIONAL MEASUREMENT MACHINES
    Publication number: 20130282329
    Abstract: In compensating precision of measurements using a probe of a measurement machine, a physical ball is provided. Surface of the physical ball is divided into horizontal slices. Points are selected on the slices, and coordinates and vectors of the points are computed. A rotating vector N3 is computed by cross-multiplying a vector N1 of a pole of the probe and a vector N2 of the physical ball, and a rotating matrix is generated by rotating the physical ball around the rotating vector N3. The coordinates in the reference point set are updated by multiplying the coordinates with the rotating matrix. A measuring program is generated according to the reference point set. The measurement machine measures points on the physical ball twice using the measuring program, to generate measuring point sets Refs and Meas. Compensation values for the probe are computed using the measuring point sets Refs and Meas.
    Type: Application
    Filed: April 15, 2013
    Publication date: October 24, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD
    Inventors: CHIH-KUANG CHANG, XIN-YUAN WU
  • COMPUTING DEVICE AND METHOD FOR ANALYZING ASSEMBLY DEFORMATION OF PRODUCT
    Publication number: 20130278606
    Abstract: In a method for analyzing assembly deformation of a product using a computing device, the computing device loads a reference drawing of a product and an actual drawing of the product after assembly into a storage system. The actual drawing is aligned with the reference drawing. A nearest distance from each point in the actual drawing to a similar point in the reference drawing is calculated, and a range that the nearest distance falls within is determined. The computing device marks each point in the actual drawing to indicate the range that the nearest distance falls within. The marked actual drawing is displayed on a display device.
    Type: Application
    Filed: April 22, 2013
    Publication date: October 24, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO.,LTD.
    Inventors: CHIH-KUANG CHANG, XIN-YUAN WU, YI LIU
  • SYSTEM AND METHOD FOR MEASURING CUTTING TOOL
    Publication number: 20130268109
    Abstract: A computing device is electronically connected with an image measuring machine. A cutting tool is fixed on a rotatable holder of the image measurement machine. The rotatable holder rotates the cutting tool, and an image capturing device captures one or more images of the cutting tool. The image measurement machines transmits image data in relation to the cutting tool, including X, Y coordinate values of pixels in each image measured by X, Y raster rulers, and a Z coordinate value of each image measured by a Z raster ruler, to the computing device. The computing device determines three-dimensional (3D) contour points of the cutting tool by processing the image data, aligns the set of 3D contour points with a reference contour image of the cutting tool, and determines whether a design of the cutting tool is qualified according to the set of 3D contour points and the reference contour image.
    Type: Application
    Filed: February 26, 2013
    Publication date: October 10, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD
    Inventors: CHIH-KUANG CHANG, XIN-YUAN WU
  • COMPUTING DEVICE AND METHOD FOR MANAGING MEASUREMENT OBJECT
    Publication number: 20130265324
    Abstract: A computing device displays an entire graphic of a measurement object on an interface displayed on a display device, and displays a tree object region on the interface, where the tree object region covers part of the entire graphic. The device redisplays the entire graphic of the measurement object by copying pixel information of the covered part from a memory of the computing device to the tree object region, creates a hierarchical tree object in the tree object region according to information of the measurement object, and stores a name of each node and coordinate information of a region occupied by each node's name into an array. When a cursor points to the tree object region, the device determines a node selected by the cursor by comparing coordinate information of the cursor with the coordinate information stored in the array.
    Type: Application
    Filed: August 29, 2012
    Publication date: October 10, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: CHIH-KUANG CHANG, XIN-YUAN WU, ZONG-TAO YANG
  • MEASUREMENT DEVICE AND METHOD OF GRAPHIC PROCESSING FOR MEASURING ELEMENTS OF OBJECTS
    Publication number: 20130265313
    Abstract: In a measurement device and a method of graphic processing for measuring elements of an object, original measuring points which are sampled on the object are acquired, a measuring element is fitted using the original measuring points. Vectors of the original measuring points are computed based on the measuring element, and the measuring element and the original measuring points are drawn based on the vectors. New measuring points are generated according to a number of the original measuring points, and corrected coordinates of the new measuring points are computed according to a predetermined deviation. The new measuring points are drawn on the measuring element according to the corrected coordinates, and the original measuring points are deleted from the measuring element. A measuring sequence of the new measuring points is determined to generate a measuring program.
    Type: Application
    Filed: April 2, 2013
    Publication date: October 10, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD
    Inventors: CHIH-KUANG CHANG, XIN-YUAN WU, ZHENG-ZHI ZHANG
  • COMPUTING DEVICE, STORAGE MEDIUM, AND METHOD FOR CALIBRATING LIGHT CHANNELS OF LIGHT SOURCE DEVICE
    Publication number: 20130257286
    Abstract: In a method of a computing device for calibrating light channels, one or more channel options of an illumination selecting unit of the computing device are selected to turn on the one or more light channels of a light source device. A camera unit captures a first image of the light source device. A zone and a serial number of each light channel are marked on the first image. Each channel option of the illumination selecting unit is eliminated. The camera unit captures a second image of the light source device when a light channel is turned off. The first image and the second image are compared, and a correlation between the light channel that is turned off and the eliminated channel option is determined. The serial numbers of the channel options are modified and remapped according to correlations between each light channel and each channel option.
    Type: Application
    Filed: October 12, 2012
    Publication date: October 3, 2013
    Inventors: CHIH-KUANG CHANG, ZHONG-KUI YUAN, JIAN-HUA LIU, NA YU, LI JIANG
  • SYSTEM AND METHOD FOR PROCESSING SHAREWARE USING A HOST COMPUTER
    Publication number: 20130262663
    Abstract: In a method for processing shareware using a host computer, a plurality of installation modes and authorization modes are sent to a client computer if the client computer requests the host computer for a shareware installation file of the shareware in the host computer. A selected installation mode and a selected authorization mode of the client computer are determined by decrypting encrypted data from the client computer using a preset decryption formula. The method further monitors the client computer according to the selected authorization mode to determining whether the client computer is allowed to run the shareware. When the client computer runs the shareware, the method records usage status of all functions of the shareware in the client computer and receiving error reports from the client computer. The method further sends solutions to the client computer in response to the error reports.
    Type: Application
    Filed: August 31, 2012
    Publication date: October 3, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: CHIH-KUANG CHANG, XIN-YUAN WU, HUA-HUI TANG
  • ELECTRONIC DEVICE AND METHOD FOR MEASURING POINT CLOUD OF OBJECT
    Publication number: 20130251195
    Abstract: A method obtains an original point-cloud of the object, filters discrete points from the original point-cloud, determines a first sub-point-cloud and a second sub-point-cloud from the filtered point-cloud, and creates an updated point-cloud of the object based on the first sub-point-cloud and the second sub-point-cloud, determines points to be fitted from the updated point-cloud. The method further fits a figure according to the determined points, determines a reference figure according to the fitted figure, determines a first point from the first sub-point-cloud and a second point from the second-point-cloud, calculates a gap width and a gap height of the updated point-cloud according to the first determined point, the second determined point, and the reference figure, and displays the gap width and the gap height on a display device.
    Type: Application
    Filed: October 9, 2012
    Publication date: September 26, 2013
    Inventors: CHIH-KUANG CHANG, XIN-YUAN WU, YI LIU
  • OPTICAL MODULE FOR IMAGE MEASURING APPARATUS
    Publication number: 20130242178
    Abstract: An optical module includes a first sleeve, a second sleeve, a connecting member and a beam splitter. The first sleeve defines a first hollow cavity and includes a first light source and a pattern plate. The second sleeve defines a second hollow cavity and a second light source. The connecting member is connected to the first sleeve and the second sleeve, and communicates with the first hollow cavity and the second hollow cavity. The beam splitter is positioned in the connecting member. Light from the first light source passes through the pattern plate, and the beam splitter, light from the second light source passes through the beam splitter, the beam splitter refracts the light from the first light source and the second light source to a tested workpiece.
    Type: Application
    Filed: October 31, 2012
    Publication date: September 19, 2013
    Inventors: CHIH-KUANG CHANG, DONG-HAI LI, LI JIANG, JIAN-HUA LIU, DONG-SHENG LIU
  • System and method for verifying manufacturing consistency of manufactured items
    Patent number: 8503756
    Abstract: In a method and system for verifying manufacturing consistency of manufactured items, N point clouds of the manufactured items are read. A first point cloud is selected from the N point clouds, and each point of the first point cloud is projected onto a predetermined ideal outline for obtaining a nearest point in the ideal outline of each point of the first point cloud. Intersections of the N point clouds and each line formed by a point in the first point cloud and the nearest point of the point are further determined, and a vertical distance between each of the intersections and the ideal outline is calculated for obtaining a deviation value of each of the intersections. At least one outline is fitted according to the deviation values of each of the intersections and the at least one fitted outline is output to a display device.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: August 6, 2013
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chih-Kuang Chang, Xin-Yuan Wu
  • Method for fabricating high voltage transistor
    Patent number: 8501603
    Abstract: A method for fabricating a high voltage transistor includes the following steps. Firstly, a substrate is provided. A first sacrificial oxide layer and a hard mask layer are sequentially formed over the substrate. The hard mask layer is removed, thereby exposing the first sacrificial oxide layer. Then, a second sacrificial oxide layer is formed on the first sacrificial oxide layer. Afterwards, an ion-implanting process is performed to introduce a dopant into the substrate through the second sacrificial oxide layer and the first sacrificial oxide layer, thereby producing a high voltage first-type field region of the high voltage transistor.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: August 6, 2013
    Assignee: United Microelectronics Corp.
    Inventors: Chih-Kuang Chang, Hsin-Hsueh Hsieh
  • COMPUTING DEVICE AND METHOD FOR IDENTIFYING BORDER LINES OF ELEMENTS ON IMAGES OF OBJECTS
    Publication number: 20130195366
    Abstract: In a method for identifying border lines of elements on an image of an object using a computing device, a Dynamic Link Library (DLL) name and one or more measuring parameters are received from the computing device. A DLL is obtained according to the received DLL name. Measuring functions of the obtained DLL are provided for selection. A constructed function of the DLL is obtained according to the number and types of the received measuring parameters to transmit the received measuring parameters to a selected measuring function. Coordinates of points on the image are computed according to the received measuring parameters using the selected measuring function, and a border line of an element on the image is fitted according to the coordinates of the points.
    Type: Application
    Filed: November 21, 2012
    Publication date: August 1, 2013
    Inventors: CHIH-KUANG CHANG, LI JIANG, ZHONG-KUI YUAN, ZHI-JUN ZOU
  • COMPUTING DEVICE AND METHOD FOR SCANNING EDGES OF AN OBJECT
    Publication number: 20130169975
    Abstract: In a method for scanning edges of an object using a computing device, the computing device is connected to an image measuring machine including an image capturing device. A start point, an end point, a scan direction, and a scan distance interval are set. Scan points on the edges of the object are determined. For each scan point, the computing device aims the image capturing device at the scan point, controls the image capturing device to capture images of the object at different depths, and records focal points. Definition values of the images are calculated and an image with a highest definition value is determined. A focal point corresponds to the image with the highest definition value and so coordinates of the scan point are determined. Scanned edges of the object are formed based on all the scan points.
    Type: Application
    Filed: August 26, 2012
    Publication date: July 4, 2013
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: CHIH-KUANG CHANG, LI JIANG, ZHONG-KUI YUAN, DONG-HAI LI, ZHI-JUN ZOU