Patents by Inventor Chang-Chun Liu

Chang-Chun Liu 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: 10290914
    Abstract: The present disclosure provides a waveguide apparatus for receiving wireless signals. The waveguide apparatus includes a first waveguide member and a second waveguide member attached to the first waveguide member to form a waveguide having an aperture for receiving wireless signals. The first waveguide member includes a first wall and a second wall forming a first corner of the aperture, and the second waveguide member includes a third wall and a fourth wall forming a third corner of the aperture. After the first waveguide member is attached to the second waveguide member, the second wall and the third wall form a second corner of the aperture, and the fourth wall and the first wall form a fourth corner of the aperture.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: May 14, 2019
    Assignee: MICROELECTRONICS TECHNOLOGY, INC
    Inventors: Hui-Na Liu, Chang-Chun Chen, Wei Huang Chen
  • Patent number: 8249330
    Abstract: A method for testing a liquid crystal panel is provided. The method simulates an outside force endured by the liquid crystal panel when the liquid crystal panel is assembled as a finished product, so that unqualified liquid crystal panels can be detected before the finished product is put into use.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: August 21, 2012
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chang-Chun Liu, Guo-Fu Guo
  • Patent number: 8090121
    Abstract: An audio adapter includes a first audio interface, a second audio interface, and two second amplifiers. The power pin of the second audio interface is connected to the non-inverting terminals of the two amplifiers. The left and right ear audio pins of the second audio interface are respectively connected to the inverting terminals of the first and the second amplifiers via two current-limiting resistors respectively. Two variable resistors are respectively connected between the inverting terminal and the output terminal of the two amplifiers. The output terminals of the two amplifiers are respectively connected to the left and right ear audio interface of the first audio interface and respectively connected to the ground pin of the first audio interface via two voltage-limiting resistors respectively.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: January 3, 2012
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chang-Chun Liu, Xiao-Lin Gan, Yu-Kuang Ho
  • Patent number: 7868593
    Abstract: A charging circuit of a portable device includes a switch circuit having an input connected to a storage battery of the portable device for triggering the storage battery to supply power to an electronic device, a reference voltage circuit, a regulating circuit, a filter circuit filtering voltage signals from the storage battery, a collecting circuit, a comparator circuit, a rectangular generator, an integral circuit, and a driving circuit. The reference voltage circuit and the collecting circuit respectively output a reference voltage signal and a collecting voltage signal to the comparator circuit. The rectangular wave generator outputs a rectangular wave to the integral circuit. The integral circuit outputs a triangle wave signal to the driving circuit. The driving circuit outputs a pulse width modulation (PWM) signal to drive the regulating circuit to charge the electronic device.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: January 11, 2011
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry co., Ltd.
    Inventors: Chang-Chun Liu, Xiao-Lin Gan, Yu-Kuang Ho
  • Patent number: 7850316
    Abstract: An adjusting apparatus is provided for a projector having a base. The adjusting apparatus includes a supporting member and a rotating member. The supporting member is partially received in the base of the projector and movably coupled to the base. The supporting member forms a plurality of teeth thereon. The rotating member is rotatably coupled to the base of the projector and partially exposed out of the base. The rotating member forms a plurality of teeth mating with the teeth of the supporting member, when the rotating member is rotated in either of two directions, the base of the projector correspondingly moves up and down relative to the supporting member.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: December 14, 2010
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chang-Chun Liu, Xiao-Lin Gan, Yu-Kuang Ho
  • Patent number: 7824041
    Abstract: An adjusting apparatus is provided for a projector and received in a case of the projector. The case includes a front wall defining a through hole. Two protrusions each defining a notch are formed on the inside surface of the front wall. The adjusting apparatus includes two supporting members partially received in the case and movably coupled to the case, and an operating member partially exposed out of the through hole of the front wall of the case. A connecting member is connected to the operating member, and received in the notches. Each supporting member forms a plurality of teeth thereon. The connecting member forms a plurality of teeth at two ends thereof respectively for mating with the teeth of the supporting member. The operating member is rotated for driving the connecting member to move up and down relative to the supporting member.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: November 2, 2010
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chang-Chun Liu, Guo-Fu Guo
  • Patent number: 7755221
    Abstract: An exemplary electronic device includes a power module having an anode and a cathode; an audio module having an audio signal terminal and a ground terminal; an audio socket having an audio signal terminal and a ground terminal; a first relay-switch; a second relay-switch; and a power adapter having an audio plug, wherein the audio terminal of the audio socket is selectively connected to the anode of the power module and the audio signal terminal of the audio module via the first relay-switch, the ground terminal of the audio socket is selectively connected to the cathode of the power module and the ground terminal of the audio module via the second relay-switch, the audio terminal and the ground terminal of the audio socket are connected to the anode and cathode of the power module when the audio plug is plugged into the audio socket.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: July 13, 2010
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chang-Chun Liu, Xiao-Lin Gan, Yu-Kuang Ho
  • Patent number: 7656654
    Abstract: A mounting apparatus for a storage device includes a bracket configured for receiving the storage device and including a sidewall defining a through hole therein, a latching member pivotally mounted to the bracket and including a latching protrusion extending through the through hole of the bracket for fixing the storage device, a rotating mechanism connected between the bracket and the latching member to enable the latching member to rotate relative to the bracket, and an elastic member connected between the bracket and the latching member for urging the latching member toward the side wall of the bracket.
    Type: Grant
    Filed: December 29, 2007
    Date of Patent: February 2, 2010
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chang-Chun Liu, Xiao-Lin Gan, Yu-Kuang Ho
  • Patent number: 7656658
    Abstract: A mounting apparatus is provided to readily fix a data storage device defining at least one hole in place. The mounting apparatus includes a bracket fastened to a computer enclosure, and the bracket includes a side panel and at least one elastic tab formed at or attached to the side panel corresponding to the hole of the data storage device. The elastic tab includes a fixing portion, for engaging in the hole of the storage device, and an operation portion positioned outside the bracket for manipulating the elastic tab.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: February 2, 2010
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chang-Chun Liu, Xiao-Lin Gan, Yu-Kuang Ho
  • Patent number: 7636241
    Abstract: A heat dissipating device includes a heat sink, and a block. The heat sink includes a base and a plurality of fins formed on the base. A bottom portion of the base defines a first groove. The block defines a second groove in one surface of the block. The block is received in the first groove, and an electronic component is received in the second groove.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: December 22, 2009
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chang-Chun Liu, Xiao-Lin Gan, Yu-Kuang Ho
  • Patent number: 7594744
    Abstract: A backlight module includes a light source and a light guide plate. The light guide plate includes a base plate and a reflecting film. The base plate has an upper surface on which a plurality of protrusions is formed, a curved bottom surface opposite to the upper surface, and a housing defined therein. The light source is accommodated in the housing. The reflecting film is plated on the curved bottom surface, for reflecting the light beams reaching the curved bottom surface to emit from the upper surface. The plurality of protrusions diffuses light beams.
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: September 29, 2009
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chang-Chun Liu, Xiao-Lin Gan, Yu-Kuang Ho
  • Patent number: 7576974
    Abstract: A flat panel display device includes a display, a connector secured to a bottom of the display, and a stand. The connector includes a pivot portion and two opposing arm portions extending from the pivot portion. The stand includes a top wall with a receiving space defined thereunder. The top wall defines a mounting channel therein. The mounting channel includes a receiving groove for pivotably receiving the pivot portion of the connector, and two opposing passing grooves extending from the receiving groove to allow the corresponding arm portions to pass therethrough and enter into the receiving space. The flat panel display device with simple structure is easy for use, assembly and disassembly.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: August 18, 2009
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chang-Chun Liu, Guo-Fu Guo, Xiao-Lin Gan, Yu-Kuang Ho
  • Publication number: 20090167341
    Abstract: A method for testing a liquid crystal panel is provided. The method simulates an outside force endured by the liquid crystal panel when the liquid crystal panel is assembled as a finished product, so that unqualified liquid crystal panels can be detected before the finished product is put into use.
    Type: Application
    Filed: October 17, 2008
    Publication date: July 2, 2009
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) Co., LTD ., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Chang-Chun Liu, Guo-Fu Guo
  • Publication number: 20090161323
    Abstract: A computer enclosure includes a main body having several walls and an opening defined in a side thereof, a detachable wall slidably mounted on the main body for shielding the opening, and a locking member pivotably attached to the detachable wall. An engaging portion is disposed in the main body. A plurality of slits is defined in corresponding walls of the main body, and a plurality of hooks extends from the detachable wall configured for slidably engaging in the corresponding slits. The locking member includes an operating element and a securing strip connecting with the operating element. The securing strip is pivotable to releasably engage with the engaging portion of the main body and abut against a wall of the main body.
    Type: Application
    Filed: December 29, 2007
    Publication date: June 25, 2009
    Applicants: HONG FU JIN PRECISION INDUSTRY ( ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: CHANG-CHUN LIU, QIAN SONG
  • Publication number: 20090160398
    Abstract: A charging circuit of a portable device includes a switch circuit having an input connected to a storage battery of the portable device for triggering the storage battery to supply power to an electronic device, a reference voltage circuit, a regulating circuit, a filter circuit filtering voltage signals from the storage battery, a collecting circuit, a comparator circuit, a rectangular generator, an integral circuit, and a driving circuit. The reference voltage circuit and the collecting circuit respectively output a reference voltage signal and a collecting voltage signal to the comparator circuit. The rectangular wave generator outputs a rectangular wave to the integral circuit. The integral circuit outputs a triangle wave signal to the driving circuit. The driving circuit outputs a pulse width modulation (PWM) signal to drive the regulating circuit to charge the electronic device.
    Type: Application
    Filed: January 30, 2008
    Publication date: June 25, 2009
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: CHANG-CHUN LIU, XIAO-LIN GAN, YU-KUANG HO
  • Publication number: 20090153810
    Abstract: An adjusting apparatus is provided for a projector and received in a case of the projector. The case includes a front wall defining a through hole. Two protrusions each defining a notch are formed on the inside surface of the front wall. The adjusting apparatus includes two supporting members partially received in the case and movably coupled to the case, and an operating member partially exposed out of the through hole of the front wall of the case. A connecting member is connected to the operating member, and received in the notches. Each supporting member forms a plurality of teeth thereon. The connecting member forms a plurality of teeth at two ends thereof respectively for mating with the teeth of the supporting member. The operating member is rotated for driving the connecting member to move up and down relative to the supporting member.
    Type: Application
    Filed: December 28, 2007
    Publication date: June 18, 2009
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: CHANG-CHUN LIU, GUO-FU GUO
  • Patent number: 7544089
    Abstract: An adapter includes a first USB interface, a second USB interface, and an audio interface. The first and the second USB interfaces each have a power pin, a first data pin, a second data pin, and a ground pin. The pins of the first USB interface respectively connected to the pins of the second USB interface correspondingly. The audio interface includes a left ear audio pin, a right ear audio pin, and a ground pin. The left ear audio pin of the audio interface is connected to the first data pin of the second USB interface. The right ear audio pin of the audio interface is connected to the second data pin of the second USB interface.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: June 9, 2009
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Chang-Chun Liu, Xiao-Lin Gan, Yu-Kuang Ho
  • Publication number: 20090140790
    Abstract: An exemplary electronic device includes a power module having an anode and a cathode; an audio module having a first audio signal terminal, a second audio signal terminal and a ground terminal; and an audio socket having a first audio signal terminal, a second audio signal terminal connected to the second audio terminal of the audio module, and a ground terminal, wherein the first audio terminal of the audio socket is selectively connected to the anode of the power module and the first audio signal terminal of the audio module via a first switch, the ground terminal of the audio socket is selectively connected to the cathode of the power module and the ground terminal of the ground module of the audio module via a second switch. Therefore, users can charge the electronic device via the audio interface.
    Type: Application
    Filed: December 20, 2007
    Publication date: June 4, 2009
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: CHANG-CHUN LIU, XIAO-LIN GAN, YU-KUANG HO
  • Publication number: 20090140578
    Abstract: An exemplary electronic device includes a power module having an anode and a cathode; an audio module having an audio signal terminal and a ground terminal; an audio socket having an audio signal terminal and a ground terminal; a first relay-switch; a second relay-switch; and a power adapter having an audio plug, wherein the audio terminal of the audio socket is selectively connected to the anode of the power module and the audio signal terminal of the audio module via the first relay-switch, the ground terminal of the audio socket is selectively connected to the cathode of the power module and the ground terminal of the audio module via the second relay-switch, the audio terminal and the ground terminal of the audio socket are connected to the anode and cathode of the power module when the audio plug is plugged into the audio socket.
    Type: Application
    Filed: December 20, 2007
    Publication date: June 4, 2009
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: CHANG-CHUN LIU, XIAO-LIN GAN, YU-KUANG HO
  • Publication number: 20090135379
    Abstract: An adjusting apparatus is provided for a projector having a front wall defining a slot therein, and a bottom wall defining a D-shaped through hole therein. The adjusting apparatus includes an operating member rotatably supported in the projector and partially exposed out of the projector from the slot of the front wall, and a supporting member having a D-shaped cross section. The operating member defines a threaded hole therein. The supporting member extends through the D-shaped through hole of the bottom wall of the projector and is partially received in the projector. The supporting member forms a plurality of threads thereon for mating with the threaded hole of the operating member. When the operating member is rotated in either of two directions, the projector correspondingly moves up or down relative to the supporting member.
    Type: Application
    Filed: December 20, 2007
    Publication date: May 28, 2009
    Applicants: HONG FU JIN PRECISION INDUSTRY(ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: CHANG-CHUN LIU, XIAO-LIN GAN, YU-KUANG HO