Patents by Inventor Wen-Chang Chang

Wen-Chang 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).

  • Publication number: 20180212337
    Abstract: An electrical connector includes an insulating body, a middle shielding sheet, an upper power terminal, a lower power terminal, and a cable. The middle shielding sheet is arranged in the insulating body, and has a base and an extending portion extending backward from the base. The extending portion is recessed with at least one yield slot. The upper power terminal extends to form an upper soldering portion entering a part above the yield slot. The lower power terminal extends to form a lower soldering portion entering a part below the yield slot. The cable has at least one power wire. The power wire has a wire core. The wire core enters the yield slot, extends to a part between the upper soldering portion and the lower soldering portion, and is soldered with the upper soldering portion and the lower soldering portion.
    Type: Application
    Filed: January 10, 2018
    Publication date: July 26, 2018
    Inventor: Wen Chang Chang
  • Publication number: 20180083399
    Abstract: An electrical connector includes a terminal module, which includes a first terminal and a positioning seat. The first terminal has a first connecting portion, a first soldering portion extending from a rear side of the first connecting portion, and a first contact portion extending forward from the first connecting portion. The first connecting portion includes a first retaining portion connected to the first soldering portion and retained into the positioning seat. A mold core cavity is concavely formed upward from a bottom surface of the positioning seat. A second terminal is located above the first terminal. An insulating body is formed outside the terminal module and the second terminal by injection-molding. A first mold core hole is concavely formed upward from a bottom surface of the insulating body, and a second mold core hole is concavely formed downward from a top surface of the insulating body.
    Type: Application
    Filed: August 23, 2017
    Publication date: March 22, 2018
    Inventors: Wen Chang Chang, Quan Long, Jin Zhu Wang
  • Publication number: 20180062319
    Abstract: An electrical connector includes a terminal module, which includes an insulating block and multiple first terminals retained at the insulating block. Each first terminal has a first contact portion exposed from a bottom surface of the insulating block. A top surface or the bottom surface of the insulating block is concavely provided with at least one groove, each of the at least one groove located between two adjacent first terminals. The groove runs forward through a front end surface of the insulating block and extends backward beyond a rear end of the first contact portion. A second terminal is located on the insulating block. The second terminal has a second contact portion, which is exposed from the top surface of the insulating block. An insulating body is formed outside the terminal module and the second terminal by injection-molding.
    Type: Application
    Filed: August 23, 2017
    Publication date: March 1, 2018
    Inventors: Wen Chang Chang, Quan Long, Jin Zhu Wang
  • Patent number: 9627817
    Abstract: An electrical connector includes an insulating body, multiple terminals received in the insulating body, and a metal member fixed to the insulating body. The terminals includes at least one ground terminal. The metal member has a first section and a second section. The second section is higher than the first section. The first section has at least one first elastic piece, the second section has at least one second elastic piece. The first elastic piece and the second elastic piece contact with a same terminal of the at least one ground terminal.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: April 18, 2017
    Assignee: LOTES CO., LTD
    Inventor: Wen Chang Chang
  • Patent number: 9590364
    Abstract: An electrical connector including an insulating body, multiple terminals received in the insulating body, and a contact member. The insulating body includes a base and a tongue extending forward from the base. The tongue has a rear segment and a front segment, and the rear segment is higher than the front segment. Each terminal has a mating portion exposed from the front segment. The front segment has an isolation portion close to the rear segment, and the isolation portion is higher than the mating portion and lower than the rear segment. The contact member is disposed at the rear segment, and used for buckling a grounding elastic sheet of a mating connector during mating. The isolation portion is at least partially located on an insertion path of the grounding elastic sheet.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: March 7, 2017
    Assignee: LOTES CO., LTD
    Inventors: Wen Chang Chang, Jin Ke Hu
  • Patent number: 9577387
    Abstract: An electrical connector includes an insulating body, a shielding sheet disposed in the insulating body, and a ground terminal received in the insulating body for mating with a mating connector. The ground terminal is fixed between a plate surface of the shielding sheet and the insulating body. The ground terminal includes a front end, a middle section, and a rear end having a soldering portion. A first contacting portion is disposed at the front end, a second contacting portion is disposed at the middle section, and the first contacting portion and the second contacting portion respectively electrically contact with the shielding sheet.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: February 21, 2017
    Assignee: LOTES CO., LTD.
    Inventors: Jin Ke Hu, Wen Chang Chang
  • Publication number: 20160352050
    Abstract: An electrical connector includes an insulating body, a shielding sheet disposed in the insulating body, and a ground terminal received in the insulating body for mating with a mating connector. The ground terminal is fixed between a plate surface of the shielding sheet and the insulating body. The ground terminal includes a front end, a middle section, and a rear end having a soldering portion. A first contacting portion is disposed at the front end, a second contacting portion is disposed at the middle section, and the first contacting portion and the second contacting portion respectively electrically contact with the shielding sheet.
    Type: Application
    Filed: May 17, 2016
    Publication date: December 1, 2016
    Inventors: Jin Ke Hu, Wen Chang Chang
  • Patent number: 9379494
    Abstract: An electrical connector includes an insulating body, upper row terminals and lower row terminals disposed in the insulating body, and a shielding casing placed on an outer side of the insulating body. The insulating body includes a base portion, and an elevated portion disposed below the base portion. Each of the terminals has a connecting portion located in the elevated portion. A shielding plate integrally extends from a bottom wall of the shielding casing to be located in front of the elevated portion. A back cover integrally bends from a top wall of the shielding casing to be located behind the elevated portion. When the electrical connector is soldered to a circuit board, the shielding plate and the back cover isolate the connecting portion from an external environment, so that the electrical connector is not affected by external electromagnetic interference (EMI) during transmission of high-frequency signals.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: June 28, 2016
    Assignee: LOTES CO., LTD
    Inventors: Jin Ke Hu, Wen Chang Chang
  • Publication number: 20160058256
    Abstract: An intelligent cleaning robot includes a housing, and a floor brush assembly and a dust suction apparatus mounted therein. The floor brush assembly has a first and second accommodating cavities, a partition plate separating the cavities, and a first and second rotatable brushes exposed from the bottom of the housing and accommodated in the cavities. A gap exists between a bottom of the partition plate and the floor. A slit is formed between the first rotatable brush and the partition plate. The dust suction apparatus includes a dust suction conduit and a dust collecting box. Two ends of the conduit are in communication with the first accommodating cavity and the box respectively. The two brushes rotate in opposite directions, the rotation of the first rotatable brush makes dirt enter the conduit through the slit, and the rotation of the second rotatable brush makes dirt enter the slit through the gap.
    Type: Application
    Filed: August 4, 2015
    Publication date: March 3, 2016
    Inventors: Ted Ju, Wen Chang Chang, Chih Kun Chen
  • Publication number: 20160028171
    Abstract: An electrical connector assembly for connecting a chip module, includes an insulation body, multiple conducting terminals and a separation plate. The insulation body has a conducting area. Two opposite side walls extend upward from two opposite sides of the conducting area. The side walls have a positioning block protruded upward. The multiple conducting terminals are located in the conducting area and used for contacting the chip module. The separation plate is located above the conducting area and positioned by the positioning block. When the chip module is mounted downward into the insulation body, the chip module is located on the separation plate.
    Type: Application
    Filed: September 24, 2014
    Publication date: January 28, 2016
    Inventors: Wen Chang Chang, Bin Wu He
  • Publication number: 20130059458
    Abstract: A card edge connector for receiving an electronic card to be inserted therein includes an insulating body, with a slot formed therein for receiving the electronic card therein; multiple conductive terminals, accommodated in the insulating body, in which each of the conductive terminals at least partially enters the slot and contacts the electronic card therein; and at least one latch. The latch includes a connecting arm with one end disposed in the insulating body and located at a side of the slot; a bent section, extending backward from the other end of the connecting arm and bent toward a side away from the electronic card; and a guide chamfer, disposed at a side of the bent section close to the electronic card and inclined downward.
    Type: Application
    Filed: December 14, 2011
    Publication date: March 7, 2013
    Applicant: LOTES CO., LTD.
    Inventor: Wen Chang Chang
  • Patent number: 8081676
    Abstract: Method and apparatus for data reception are provided, retrieving digital values transmitted through a cable. In a data receiver, an equalizer equalizes an input signal based on a boost value to generate an equalized signal, and a data extractor samples the equalized signal to extract output values from each symbol period. The data extractor detects signal quality of the equalized signal to adjust the boost value accordingly. An optimal time point is detected within one symbol period where an output value is an ensured valid, and variation rate of the optimal time point is counted as an inverse indicator of the signal quality.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: December 20, 2011
    Assignee: Mediatek Inc.
    Inventors: Chien Ming Chen, Wen-Chang Chang
  • Publication number: 20110175812
    Abstract: A radio-frequency mouse is used for receiving an electromagnetic wave transmitted by an electronic device. The radio-frequency mouse includes a RF transceiver, a sensor, a micro-controller, a battery, and a power management circuit. The RF transceiver receives and converts an electromagnetic wave into a RF power. The sensor outputs an operation signal according to an operating condition of the RF mouse. The micro-controller transfers an operation signal to the RF transceiver, and the RF transceiver transmits the operation signal to the electronic device. The power management circuit receives the RF power, and selectively supplies the RF power or the battery power of the battery to the sensor and the micro-controller according to RF power. Thus, when the RF power is higher than a preset value, the RF mouse is supplied with power, thereby saving the battery power of the RF mouse and improving a battery life of the RF mouse.
    Type: Application
    Filed: January 13, 2011
    Publication date: July 21, 2011
    Applicant: KYE SYSTEMS CORP.
    Inventors: Chun-Nan Hsien, Ruei-Chen Mao, Chien-Lung Lu, Yao-Hung Chuang, Wen-Chang Chang
  • Patent number: 7967618
    Abstract: A memory card connector is used for being plugged with a memory card. The memory card connector includes an insulating body having a plugging slot and two pivoting bases, two locking parts, and a plurality of conducting pins received in the insulating body. The memory card is plugged into the plugging slot. The two pivoting bases are respectively located at two sides of the insulating body. The pivoting base that is close to the plugging slot has a blocking portion. The two locking parts are respectively pivoted with the two pivoting bases for holding the memory card and can be entered by the blocking portion. The total height of the memory card connector is reduced. The required space for packaging and shipping the memory card connector is reduced to lower the shipping cost.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: June 28, 2011
    Assignee: Lotes Co., Ltd.
    Inventor: Wen Chang Chang
  • Publication number: 20110081797
    Abstract: A memory card connector is used for being plugged with a memory card. The memory card connector includes an insulating body having a plugging slot and two pivoting bases, two locking parts, and a plurality of conducting pins received in the insulating body. The memory card is plugged into the plugging slot. The two pivoting bases are respectively located at two sides of the insulating body. The pivoting base that is close to the plugging slot has a blocking portion. The two locking parts are respectively pivoted with the two pivoting bases for holding the memory card and can be entered by the blocking portion. The total height of the memory card connector is reduced. The required space for packaging and shipping the memory card connector is reduced to lower the shipping cost.
    Type: Application
    Filed: December 23, 2009
    Publication date: April 7, 2011
    Applicant: LOTES CO., LTD.
    Inventor: WEN CHANG CHANG
  • Patent number: 7874875
    Abstract: An electrical connector for electrically connecting an element to a circuit board includes at least two adjacent insulation bodies, a plugging slot located on the insulation bodies for being plugged with the element, and a set of conductive terminals disposed on the insulation bodies and electrically connected with the circuit board. One side of each of the insulation bodies is movably connected with the adjacent insulation body. When the circuit board undergoes soldering process, the relation position of the insulation bodies at the adjacent location is automatically adjusted according to the warp caused by the high temperature of soldering so as to reduce the warp and deformation. Thereby, the soldering portion of each conductive terminal received in the insulation bodies can be soldered onto the circuit board well, such that electrical connector is normally and electrically connected with the circuit board.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: January 25, 2011
    Assignee: Lotes Co., Ltd.
    Inventor: Wen Chang Chang
  • Patent number: 7796193
    Abstract: A video signal processing system for slicing binary data transmitted in a video signal is provided, comprising a synchronous separator, a line counter, a slicing signal generator and a comparator. The synchronous separator detects Hsync and Vsync carried in the video signal. The line counter generates an enable signal by counting the number of scanning lines based on the detected Hsync and Vsync, wherein the enable signal is activate when the video signal carrying teletext and/or other binary data. The slicing signal generator further comprises an extreme value detector determining local maximum values and local minimum values of the video signal, and a slicing level determiner generating an adaptive slicing signal based on the local maximum values and the local minimum values. The comparator enabled by the enable signal compares the video signal with the slicing signal.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: September 14, 2010
    Assignee: Mediatek Inc.
    Inventors: Wen-Chang Chang, Siou-Shen Lin
  • Patent number: 7771209
    Abstract: The electrical connecting apparatus according to the present invention is used for providing electrical contacts for an electronic device and comprises a housing and a plurality of electrical contacts. At least one passageway is set on the housing. At least two ribs are set in the passageways. Within the passageways, at least one holding space is formed between two adjacent ribs. The electrical contacts are set in the passageways, respectively. In addition, portions of at least two electrical contacts are accommodated in the same holding space. The electrical contact has a base portion located underneath the rib. A pair of contact portions is formed by extending upwards from the base portion along corresponding two sides of the rib. Besides, at least one contact portion pass through the holding space. When the paired contact portions of each said electrical contact make contact with the electronic device, the contact portions move away from said rib.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: August 10, 2010
    Assignee: Lotes Co., Ltd
    Inventor: Wen-Chang Chang
  • Publication number: 20100062630
    Abstract: An electrical connector for electrically connecting an element to a circuit board includes at least two adjacent insulation bodies, a plugging slot located on the insulation bodies for being plugged with the element, and a set of conductive terminals disposed on the insulation bodies and electrically connected with the circuit board. One side of each of the insulation bodies is movably connected with the adjacent insulation body. When the circuit board undergoes soldering process, the relation position of the insulation bodies at the adjacent location is automatically adjusted according to the warp caused by the high temperature of soldering so as to reduce the warp and deformation. Thereby, the soldering portion of each conductive terminal received in the insulation bodies can be soldered onto the circuit board well, such that electrical connector is normally and electrically connected with the circuit board.
    Type: Application
    Filed: December 1, 2008
    Publication date: March 11, 2010
    Inventor: Wen Chang Chang
  • Publication number: 20100062619
    Abstract: The electrical connecting apparatus according to the present invention is used for providing electrical contacts for an electronic device and comprises a housing and a plurality of electrical contacts. At least one passageway is set on the housing. At least two ribs are set in the passageways. Within the passageways, at least one holding space is formed between two adjacent ribs. The electrical contacts are set in the passageways, respectively. In addition, portions of at least two electrical contacts are accommodated in the same holding space. The electrical contact has a base portion located underneath the rib. A pair of contact portions is formed by extending upwards from the base portion along corresponding two sides of the rib. Besides, at least one contact portion pass through the holding space. When the paired contact portions of each said electrical contact make contact with the electronic device, the contact portions move away from said rib.
    Type: Application
    Filed: September 8, 2008
    Publication date: March 11, 2010
    Inventor: Wen-Chang Chang