Patents Assigned to Primax Electronics
  • METHOD FOR BLURRED IMAGE JUDGMENT
    Publication number: 20070252907
    Abstract: A method for blurred image judgment is provided. Firstly, a focus value FV1 of an original image is calculated. By using a blur function, the original image is obfuscated to generate a blurred image, and then the focus value FV2 of the blurred image is calculated. A blur ratio FV1/FV2 is compared with a blur threshold value Tp, thereby discriminating whether the original image is blurred according to the comparing result. The method for blurred image judgment is applicable to a digital image capture device. If the original image is deemed blurred, a blur image signal is issued to notify the user whether the retaking operation is done.
    Type: Application
    Filed: July 6, 2006
    Publication date: November 1, 2007
    Applicants: Primax Electronics Ltd.
    Inventor: Wei Hsu
  • METHOD FOR EVALUATING EFFECTIVE SAMPLING STEPS OF AUTO FOCUS
    Publication number: 20070253691
    Abstract: A method of evaluating effective sampling steps of auto focus is provided. By utilizing the depth-of-field feature, many sampling steps are ignored and some representative steps in the depth-of-field range are used as the effective sampling steps. Since the sampling steps are minimized, the search time is largely reduced without deteriorating the search effectiveness.
    Type: Application
    Filed: July 6, 2006
    Publication date: November 1, 2007
    Applicant: Primax Electronics Ltd.
    Inventor: Wei Hsu
  • ROLLER FUNCTION SWITCHING METHOD
    Publication number: 20070242045
    Abstract: A roller function switching method is used between a mouse device and a computer system operated with a browser program. Firstly, the computer system is operated in a roller function switching mode. Then, the computer system controls the browser program to change a browsing page in response to a directional rolling signal generated by rotating the roller of the mouse device in a first function state. Afterward, the computer system controls the browser program to scroll the browsing page in response to the directional rolling signal generated by rotating the roller of the mouse device in a second function state. The roller function is switched between the first function state and the second function state in response to a function state switching signal generated by the operation of the mouse device.
    Type: Application
    Filed: July 5, 2006
    Publication date: October 18, 2007
    Applicant: Primax Electronics Ltd.
    Inventors: Chih-Feng Chien, Tzu-Chiang Shih
  • System for speeding up the arithmetic coding processing and method thereof
    Patent number: 7283073
    Abstract: A system for speeding up the arithmetic coding processing and method thereof is used in a calculating method in which when the input data are two successive same pixel values and the context values (CX) thereof. The output interval size A and base C are determined by adding a set of operation circuits and a set of speed-up tables, such that the A, C values which needed two clock cycles previously may be calculated within a clock cycle, thereby achieving the object of speeding up the arithmetic coding processing.
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: October 16, 2007
    Assignee: Primax Electronics Ltd.
    Inventor: Pei-Chung Chen
  • Method for image processing by unsharp masking
    Patent number: 7283680
    Abstract: A method for adjusting an image signal by a processor includes providing a first low pass filter and a second low pass filter, generating an energy ratio of a band-pass image signal and the image signal according to the standard deviation of a first low pass signal of the first low pass filter and a second low pass signal of the second low pass filter, providing an image adjustment parameter and generating a weighting coefficient of the image signal according to the energy ratio and the image adjustment parameter, generating a third low pass filter according to the weighting coefficient of the image signal, the image adjustment parameter, the first low pass signal of the first low pass filter and the second low pass signal of the second low pass filter, and adjusting the image signal according to the image signal and the third low pass filter.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: October 16, 2007
    Assignee: Primax Electronics Ltd.
    Inventor: Tzu-Hung Cheng
  • System for determining return of photo sensor in scanner and method thereof
    Patent number: 7265880
    Abstract: A system for determining the return of the photo sensor in the scanner and the method thereof are disclosed. There are two base position sensing units in the system. Each of the base position sensing units computes the currents in two sections of a line resistance material defined by the position of the photo sensor after a document is scanned to determine which base position sensing unit the photo sensor should return to. This method reduces the return time of the photo sensor than the prior art in which the photo sensor can only return to a single end. Therefore, the system helps achieving the goals of increasing the scanning efficiency and saving power. Moreover, the system realizes the image scanning in both directions.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: September 4, 2007
    Assignee: Primax Electronics Ltd.
    Inventor: Fu-Wen Lee
  • Document feeder
    Patent number: 7264240
    Abstract: A document feeder includes a housing, a control lever and a sheet pick-up module. The housing includes a feeding path defined by a first sidewall and a second sidewall. The control lever is mounted on the first sidewall, and includes a pivotal part, a collar and a handle part. The collar is arranged between the pivotal portion and the handle part. The sheet pick-up module includes a driving shaft mounted on the collar and the second sidewall.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: September 4, 2007
    Assignee: Primax Electronics Ltd.
    Inventor: Hsin-Wen Lee
  • Reconfigurable peripheral device for use with wireless apparatus
    Patent number: 7266392
    Abstract: A reconfigurable peripheral device for use with a wireless apparatus is employed for receiving a signal from the wireless apparatus and transmitting a signal to the wireless apparatus. The reconfigurable peripheral device includes a first member, a second member and a third member. The first member includes a badge. The second member is detachably coupled to the first member, and includes a wireless signal processing circuit for receiving the signal from the wireless apparatus and transmitting the signal to the wireless apparatus. The third member is coupled to the second member, and includes an output device for outputting the signal received by the second member to the user.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: September 4, 2007
    Assignee: Primax Electronics Ltd.
    Inventors: Jong-Ding Wang, Meng-Stephen Su, Kris Verstockt
  • SCANNING MODULE OF IMAGE SCANNER
    Publication number: 20070195440
    Abstract: A scanning module of an image scanner for scanning a document is provided. The scanning module of the image scanner includes a base, a reflective mirror stand, a shaft, a reflective mirror member and a gear set. The reflective mirror stand is mounted on the base. The shaft is rotatably mounted on the reflective mirror stand. The reflective mirror member is fixed on the shaft and rotated with the shaft. The gear set is pivotally coupled to the shaft for rotating and driving the shaft to adjust the reflective angle of the reflective mirror member, which is fixed on the shaft.
    Type: Application
    Filed: June 5, 2006
    Publication date: August 23, 2007
    Applicant: Primax Electronics Ltd.
    Inventors: Hsi-Yu Chen, Kuan-Yang Chen
  • OPTICAL SCANNING MODULE
    Publication number: 20070194120
    Abstract: An optical scanning module includes a housing, a light source and a first heat-dissipating sheet. The light source is disposed inside the housing for emitting a source light to be projected onto the object. The light source includes an electrode wrapped by an electric-insulating and heat-conducting rubber. The first heat-dissipating sheet is arranged on a surface of the housing and in contact with the electric-insulating and heat-conducting rubber.
    Type: Application
    Filed: June 5, 2006
    Publication date: August 23, 2007
    Applicant: Primax Electronics Ltd.
    Inventors: Hsi-Yu Chen, Kuan-Yang Chen
  • Optical scanner
    Patent number: 7256914
    Abstract: An optical scanner for scanning a document includes a housing, a glass platform, an optical scanning module and a heat dissipating member. The glass platform is disposed on the housing for placing thereon the document to be scanned. The optical scanning module is disposed inside the housing for scanning the document. The heat dissipating member is disposed inside the housing and in contact with a first lateral edge of the glass platform for conducting the heat generated from the optical scanning module to the glass platform such that the heat is then radiated from the glass platform to the outside of the housing.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: August 14, 2007
    Assignee: Primax Electronics Ltd.
    Inventors: Hsi-Yu Chen, Kuan-Yang Chen
  • Digital image interpolation method
    Patent number: 7257276
    Abstract: A digital image interpolation method is disclosed which a projection point (x, y) of the original image corresponding to a pixel of the transformed image first is determined. According to neighboring pixels (m, n) of the projection point, Gauss weights Wi then are determined. Lastly, according to the Gauss weights Wi and the corresponding color value Vi of the neighboring pixels, a color value f (x, y) of the projection point is computed. Via an interpolation method using Gauss weight, the computation time is reduced while qualitatively improving the image processing.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: August 14, 2007
    Assignee: Primax Electronics Ltd.
    Inventors: Yan-Ru Jiang, Po-Chiang Yeh
  • WIRELESS CURSOR CONTROL DEVICE
    Publication number: 20070171096
    Abstract: A wireless cursor control device for use with a computer system includes a main body, a wireless signal receiver, a storing portion and a resilient pad member. The main body generates a wireless signal to control a cursor of the computer system. The wireless signal receiver is swappable to be electrically connected to the computer system for receiving the wireless signal. The storing portion is disposed in the main body for accommodating the wireless signal receiver. The resilient pad member is engaged with the bilateral sides of the storing portion, and deformed to generate a restoring force when the wireless signal receiver is inserted into the storing portion. The resilient pad member is sustained against the wireless signal receiver according to the restoring force.
    Type: Application
    Filed: June 6, 2006
    Publication date: July 26, 2007
    Applicant: Primax Electronics Ltd.
    Inventors: Hsiao-Lung Chiang, Chin-Kuan Lou
  • Detection method and device for detecting quality of optical element
    Patent number: 7248348
    Abstract: A detection method for detecting quality of an optical element includes the following steps. Firstly, a point light source is provided. Then, the point light source is allowed to penetrate through the optical element, thereby forming a first optical image on an optical image processing device. Then, the position of the optical element is adjusted when there is a shade block included in the first optical image, and the point light source is allowed to penetrate through the optical element after the adjusting step, thereby forming a second optical image on the optical image processing device. Afterward, the first optical image is compared with the second optical image to discriminate whether the shade block is synchronously moved with position adjustment of the optical element so as to realize the quality of the optical element.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: July 24, 2007
    Assignee: Primax Electronics Ltd.
    Inventors: Hou-Ching Chin, Hsaing-Nan Chen
  • INPUT DEVICE WITH TILTABLE SCROLL WHEEL MODULE
    Publication number: 20070159462
    Abstract: A tiltable scroll wheel module for use in an input device is provided. Two confining members with complementary shapes are arranged inside the tiltable scroll wheel module. When the scroll wheel is pressed down, these two confining members are engaged with each other. Under this circumstance, the carrier member is confined in position without largely swinging the carrier member toward the left or right side thereof.
    Type: Application
    Filed: June 5, 2006
    Publication date: July 12, 2007
    Applicant: Primax Electronics Ltd.
    Inventors: Hong-Che Yen, Hsiao-Lung Chiang, Bing-Jhang Tu
  • HEADPHONE DEVICE
    Publication number: 20070154051
    Abstract: A headphone device includes a sound amplifying member, a connecting member and a fixing member. The sound amplifying member includes a first speaker and a second speaker for outputting a sound. The connecting member is interconnected between the first speaker and the second speaker and made of first flexible material. The connecting member is flexibly wound around the first speaker and the second speaker. The fixing member is coupled to the sound amplifying member for securing the connecting member thereon after the connecting member is wound around the first speaker and the second speaker.
    Type: Application
    Filed: July 18, 2006
    Publication date: July 5, 2007
    Applicant: Primax Electronics Ltd.
    Inventors: Han-Kai Wang, Kris Verstockt, Chen-Han Sung
  • Belt tension adjustment mechanism
    Publication number: 20070129189
    Abstract: A belt tension adjustment mechanism for use in an optical module of a scanning apparatus includes a sliding member, a fixture member, a supporting member and a resilient member. The sliding member is arranged on a surface of the optical module and movable on the surface of the optical module. The fixture member is used to fix the belt. The supporting member supports the belt. By means of the resilient member, a tension is applied onto the belt.
    Type: Application
    Filed: January 17, 2006
    Publication date: June 7, 2007
    Applicant: Primax Electronics Ltd.
    Inventors: Kuo-Ching Huang, Yu-Cheng Chang
  • Method of compressing and decompressing images
    Patent number: 7218786
    Abstract: A method of compressing and decompressing images is disclosed for applications in compression and decompression chips with the JBIG standard. The pipeline of computing a pixel is divided into three parts: memory access, numerical operations, renormalization and byteout/bytein. Each steps takes a work cycle; therefore, three pixels are processed in parallel at the same time. In comparison, the work cycle of the prior art without pipeline improvement is longer. This method can effectively shorten the work cycle of each image data process, increasing the speed of compressing and decompressing image data.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: May 15, 2007
    Assignee: Primax Electronics Ltd.
    Inventor: Che-Sheng Lin
  • Scanning method of image scanner and image scanner having a plurality of color light sources with a control circuit
    Patent number: 7208715
    Abstract: An image scanner and scanning method thereof are provided. By simultaneously using two light emitting diodes of different colors as light sources and cooperatively performing simple image data computations, three color image signals are obtained so as to shorten the exposure time and improve signal-to-noise ratio of the image signal.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: April 24, 2007
    Assignee: Primax Electronics Ltd.
    Inventor: Chien Kuo Kuan
  • Connector for coupling a data communication socket with a computer's peripheral device
    Patent number: 7207813
    Abstract: A connector is provided for coupling a computer peripheral device with a RJ11 or RJ45 data communication socket. The computer peripheral device has a rectangular recess. The connector includes an elongated main body including a first terminal and a second terminal. The first terminal has a shape mating with the data communication socket. The second terminal has a shape mating with the rectangular recess of the computer peripheral device. As a consequence, the computer peripheral device is attached onto the notebook computer in a cost-effective manner.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: April 24, 2007
    Assignee: Primax Electronics Ltd.
    Inventors: Hsiao-Lung Chiang, Yu-Chih Cheng