Patents Assigned to Primax Electronics Ltd.
  • Mouse with changeable footpads
    Patent number: 8184098
    Abstract: A mouse with changeable footpads is provided. The mouse includes an upper case, a lower cover and a plurality of mouse footpad modules. The lower cover is disposed under the upper case. The lower cover includes a plurality of footpad holes. The footpad modules are disposed in respective footpad holes. Each of the mouse footpad modules includes a base, a first footpad and a second footpad. The first footpad is disposed on the upper surface of the mouse footpad module. The second footpad is disposed on the lower surface of the mouse footpad module. By rotating the mouse footpad module, the first footpad or the second footpad is selectively exposed to the external surface of the lower cover.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: May 22, 2012
    Assignee: Primax Electronics Ltd.
    Inventor: Chun-Che Wu
  • Thin type illuminated keyboard
    Patent number: 8173922
    Abstract: A thin type illuminated keyboard includes a light source, a light-guiding frame plate, a keycap, a membrane plate, a switch circuit plate and a base plate. The light source is used for emitting light. The light-guiding frame plate has a concave structure in a bottom surface thereof. The keycap is connected with the light-guiding frame plate and movable upwardly or downwardly with respect to the light-guiding frame plate. The keycap has a light-transmissible character portion. The light source is disposed on the membrane plate and accommodated within the concave structure of the light-guiding frame plate. The keycap, the light-guiding frame plate, the membrane plate, the switch circuit plate and the base plate are sequentially arranged from top to bottom. The light emitted by the light source is guided by the light-guiding frame plate to irradiate the light-transmissible character portion.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: May 8, 2012
    Assignee: Primax Electronics Ltd.
    Inventor: Bo-An Chen
  • Continuously variable speed-changing transmission mechanism of sheet laminating apparatus
    Patent number: 8172719
    Abstract: A continuously variable speed-changing transmission mechanism of a sheet laminating apparatus includes a control module, a speed changing module, a speed reducing module and a hot press roller module. The continuously variable speed-changing transmission mechanism can laminate a sheet article at a stepless variable speed.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: May 8, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Yung-Tai Pan, Chang-Qi Wu
  • Portable electronic device and method for measuring distance by performing auto focus function
    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
  • Illuminated keyboard
    Patent number: 8168903
    Abstract: An illuminated keyboard includes a frame plate, a character keycap, a light source, a membrane plate, a switch circuit plate and a base plate. The character keycap is connected with the frame plate, and movable upwardly or downwardly with respect to the frame plate. The light source is disposed under the character keycap for emitting invisible light. The character keycap, the frame plate, the membrane plate, the switch circuit plate and the base plate are sequentially arranged from top to bottom. The illuminated keyboard further includes a luminous substance, which is excited by the light source to generate visible light to irradiate the illuminated keyboard.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: May 1, 2012
    Assignee: Primax Electronics Ltd.
    Inventor: Bo-An Chen
  • Key structure and keyboard having such key structure
    Patent number: 8164017
    Abstract: A key structure and a keyboard including multiple key structures are provided. The key structure includes a keycap, a base plate and a scissors-type support member between the keycap and the base plate. The scissors-type support member includes an inner frame having a convex part and an outer frame having a recess. The convex part is accommodated within the recess. By controlling relative positions between the convex part and the recess, the keycap is stably moved in the vertical direction.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: April 24, 2012
    Assignee: Primax Electronics Ltd.
    Inventor: Yu-Chih Cheng
  • Sheet pick-up device of automatic document feeder
    Patent number: 8162312
    Abstract: A sheet pick-up device of an automatic document feeder is provided. The sheet pick-up device includes a two-way clutch transmission mechanism, a sheet pick-up arm, a stopper and a linking assembly. When the two-way clutch transmission mechanism is operated to have the sheet pick-up arm move to a standby position, the stopper is moved with the linking assembly to be in a stopping position. Whereas, when the two-way clutch transmission mechanism is operated to have the sheet pick-up arm move to a sheet pick-up position, the stopper is in a non-stopping position. The sheet pick-up device has enhanced operating stability.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: April 24, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Tung-Wen Tu, Jian Zeng, Jian-Gju Yu
  • Automatic document feeder with sheet pick-up module
    Patent number: 8152158
    Abstract: An automatic document feeder includes a top cover having a fixing structure and first attracting element, a sheet pick-up module and a second attracting element. The fixing structure and the first attracting element are disposed on an inner surface of the top cover. The sheet pick-up module includes a sheet pick-up arm. The sheet pick-up arm is rotated to either a standby position or a sheet feeding position. The second attracting element is disposed on the sheet pick-up arm. When the sheet pick-up arm is rotated to the sheet feeding position, the sheet pick-up module feeds the sheet into an internal portion of the automatic document feeder. When the sheet pick-up arm is rotated to the standby position, the first attracting element and the second attracting element are attracted by each other so that the sheet pick-up arm is fixed on the standby position.
    Type: Grant
    Filed: January 11, 2010
    Date of Patent: April 10, 2012
    Assignee: Primax Electronics Ltd.
    Inventor: Wei-Hsun Hsu
  • Keyboard device
    Patent number: 8154429
    Abstract: The present invention relates to a keyboard device. The keyboard device includes a base, a main circuit board, a base cover, a touching membrane switch, a touching thin plate, an upper cover and a plurality of keys. The touching membrane switch is activated to implement a predefined hot key function so as to reduce fabricating cost.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: April 10, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Chien-Ming Su, Yuan-Lan Yang, Chih-Wen Su, Chun-Nan Su, Chin-Lung Lai
  • Variable frequency controlling system and method of shredder
    Patent number: 8152082
    Abstract: A variable frequency controlling system of a shredder is provided. The variable frequency controlling system includes a thickness sensor, a speed-variable motor and a controlling module. The controlling module is electrically connected to the speed-variable motor and the thickness sensor, and includes a look-up table. The thickness sensor is used for detecting a thickness of an article fed into the shredder. The speed-variable motor is operated at a variable rotating speed. When a thickness-detecting signal is received by the controlling module, the operating data corresponding to the thickness-detecting signal are searched from the look-up table and outputted from the controlling module to the speed-variable motor, thereby controlling the speed-variable motor to be operated at a proper rotating speed. As a consequence, a power-saving purpose is achieved by the variable frequency controlling system.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: April 10, 2012
    Assignee: Primax Electronics Ltd.
    Inventor: Yung-Tai Pan
  • Multi-function wheel mouse with two scroll wheels
    Patent number: 8154516
    Abstract: A wheel mouse includes a first scroll wheel, a second scroll wheel, a first encoder, a second encoder and a control unit. The first encoder generates a first rotation signal according to the rotating condition of the first scroll wheel. The second encoder generates a second rotation signal according to the rotating condition of the second scroll wheel. The control unit is electrically connected to the first encoder and the second encoder for executing a corresponding function in response to the first rotation signal and the second rotation signal. The control unit executes a first function when only the first rotation signal is generated. The control unit executes a second function when only the second rotation signal is generated. The control unit executes a third function when the first rotation signal and the second rotation signal are simultaneously generated.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: April 10, 2012
    Assignee: Primax Electronics Ltd.
    Inventor: Chun-Che Wu
  • Speed changing transmission mechanism of sheet laminating apparatus
    Patent number: 8141446
    Abstract: A speed changing transmission mechanism of a sheet laminating apparatus includes a reverse module, a power output shaft, a first power output roller, a second power output roller, a first belt, a second belt, a power input module and a shift module. Utilizing the reverse module, the power input module and the shift module, the speed changing transmission mechanism is capable of hot laminating the sheet article and withdrawing the jammed sheet article.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: March 27, 2012
    Assignee: Primax Electronics Ltd.
    Inventor: Yung-Tai Pan
  • Duplex scanning apparatus
    Patent number: 8144377
    Abstract: The present invention relates to a duplex scanning apparatus. The duplex scanning apparatus includes a sheet input tray for placing a stack of documents thereon. For performing duplex scanning operations on the stack of paper sheets, the documents are successively scanned from the bottommost one to the uppermost one. As a consequence, the scanned documents are stacked in the sheet ejecting tray in the same order as that of the original stack.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: March 27, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Chung-Kai Wang, Chien-Kuo Kuan
  • Speed changing transmission mechanism of sheet laminating apparatus
    Patent number: 8136565
    Abstract: A speed changing transmission mechanism of a sheet laminating apparatus includes a speed changing module, a motor, a switching gear, a hot press gear, a first connecting gear and a second connecting gear. By switching the switching gear to be engaged with different gear, the speed changing transmission mechanism is capable of hot laminating the sheet article and withdrawing the jammed sheet article.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: March 20, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Yung-Tai Pan, Chang-Qi Wu
  • Automatic document feeder
    Patent number: 8136811
    Abstract: An automatic document feeder includes a paper guide casing, a photo interrupter, a first sensing unit, a second sensing unit and a controller. During the paper is transported through the paper guide casing, the first sensing unit and the second sensing unit are respectively triggered by two ends of the paper. Consequently, the photo interrupter is conducted for a first duration T1 or a second duration T2. According to the first duration T1 or the second duration T2, a skew angle of the paper is calculated by the controller.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: March 20, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Ping-Hung Kuo, Wei-Hsun Hsu, Szu-Chieh Wu
  • Duplex printing apparatus
    Patent number: 8137014
    Abstract: The present invention relates to a duplex printing apparatus. The duplex printing apparatus includes a paper input tray, a paper ejecting tray, a paper pick-up roller, a paper feeding channel, a first paper transfer roller assembly, a scanning and developing print unit, a print region, a paper ejecting channel, a second paper transfer roller assembly, an inverting channel, a paper guide slice, a third paper transfer roller assembly and a paper ejecting roller assembly. By arranging the inverting channel between the print region and the paper ejecting tray, the printing speed is enhanced.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: March 20, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Chung-Kai Wang, Chien-Kuo Kuan
  • Sheet alignment and ejection mechanism
    Patent number: 8136810
    Abstract: A sheet alignment and ejection mechanism includes a sheet alignment device, a sheet ejection device, a power device and a transmission unit. The sheet alignment device includes a first one-way element. The sheet ejection device includes a second one-way element. The transmission unit includes plural gears. The transmission unit is connected with the power device, the first one-way element and the second one-way element for driving rotation of the first one-way element and the second one-way element. The first one-way element and the second one-way element are rotated in opposite directions. When the first one-way element is rotated in a first direction, the sheets aligned on a sheet placement tray are aligned by the sheet alignment device. When the second one-way element is rotated in the first direction, the stapled sheets are ejected out of the sheet placement tray by the sheet ejection device.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: March 20, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Ching-Tse Wang, Chung-Kai Wang, Ming-Han Chiu
  • Automatic keyboard testing system
    Patent number: 8117504
    Abstract: An automatic keyboard testing system includes a computer, an automatic testing program and a testing frame. A keyboard circuit board to be tested in placed on the testing frame. The automatic testing program is installed in the computer for generating a testing signal and has a predetermined time period. The testing frame generates a simulating signal according to the testing signal and conducts a key intersection point corresponding to the simulating signal, so that the keyboard circuit board output a key scanning code corresponding to the conducted key intersection point to the computer. The automatic testing program discriminates whether the key scanning code is transmitted to the computer within the predetermined time period.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: February 14, 2012
    Assignee: Primax Electronics Ltd.
    Inventor: Pei-Ming Chang
  • Image processing method for deriving text characteristic image from input image and related apparatus
    Patent number: 8111926
    Abstract: An image processing method for deriving text characteristic images from an input image includes: performing a plurality of edge detecting processes upon the input image to generate a plurality of edge images, respectively, and deriving a first text characteristic image according to the edge images. The image detecting processes include: performing a first edge detecting process upon the input image to derive a first edge image according to a first upper threshold and a first lower threshold, and performing a second edge detecting process upon the input image to derive a second edge image according to a second upper threshold and a second lower threshold.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: February 7, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Wu-Jie Liao, Ting-Yuan Cheng, Pai-Yu Tien, Hui-Jan Chien, Tsai-Hsing Chen
  • Image brightness adjusting method
    Patent number: 8107763
    Abstract: An image brightness adjusting method is provided. The brightness values of all pixels of the image are firstly increased in various increasing degrees. Next, the increased brightness values are decreased in various decreasing degrees according to the original brightness values, thereby avoiding over-increasing the brightness values of the image. Moreover, the use of the color saturation values to adjust the brightness values can avoid the unnatural image appearance.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: January 31, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Ying-Jieh Huang, Chiou-Shann Fuh, Hsiang-Ting Chen