Patents by Inventor De-An Chang
De-An 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).
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Publication number: 20200021021Abstract: A low-profile dual-band high-isolation antenna module is fixed on a substrate and includes two high-frequency antennas and two low-frequency antennas located on two opposite sides of the substrate respectively. The bottom ends of the low-frequency antennas are connected to a grounding of the substrate. A decoupling element is disposed between the high-frequency antennas and the low-frequency antennas. The top end of each high-frequency antenna forms a bent portion, and so does the top end of each low-frequency antenna. The decoupling element has two ends extending to positions corresponding respectively to the low-frequency antennas but is not in contact with the low-frequency antennas or the high-frequency antennas. The bottom end of the decoupling element is connected to the grounding through at least one metal strip. The bent portions effectively reduce the space occupied by the antennas while the decoupling element provides isolation between the antennas.Type: ApplicationFiled: January 3, 2019Publication date: January 16, 2020Inventors: Kuang-Wei Lin, De-Chang Su
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Publication number: 20190326683Abstract: An antenna assembly with compact layout traces includes a circuit board and at least one wireless antenna unit, wherein the circuit board is provided with an antenna module, the at least one wireless antenna unit can be located at the same edge or at different edges of the circuit board, each of the at least one wireless antenna unit includes two antennas of the planar inverted-F antenna (PIFA) structure and a neutralization line, and the two antennas are spaced apart from each other and the two ends of the neutralization line are electrically connected to and overlap the two antennas respectively. By arranging antennas of the same working band along the same edge of the circuit board, the corresponding layout traces can be effectively shortened.Type: ApplicationFiled: January 3, 2019Publication date: October 24, 2019Inventors: De-Chang SU, Chih-Kai YANG
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Publication number: 20170158578Abstract: A means for energy storage includes: a Li-B alloy, wherein the molecular formula of the Li—B alloy is Lix B1-x, x is the atomic fraction of Li, and x is between 0.1 and 0.95. A means for energy release includes: a Li—B alloy adapted to react with oxygen at ambient temperature, wherein the molecular formula of the Li—B alloy is Lix B1-x, x is the atomic fraction of Li, and x is between 0.1 and 0.95. A method for controlling a released heat of a Li—B alloy includes the steps of: providing a Li—B alloy placed in a container; and controlling oxygen flux to the container.Type: ApplicationFiled: November 28, 2016Publication date: June 8, 2017Inventors: Frederick E. WANG, De-Chang TSAI
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Publication number: 20170157658Abstract: An automatic-alignment load-detection apparatus includes: a drawing die, an adapter ring, a tapered spacer and a force sensor. An automatic-alignment load-detection method includes steps of: providing an automatic-alignment load-detection apparatus used for a wire drawing machine, and applying a pulling force, to enable a wire to pass through the drawing die, the adapter ring, the tapered spacer and the force sensor. At the same time when the wire is being pulled, the wire can pass through the drawing die and rub against the drawing die, to enable the drawing die to apply a force on the adapter ring, the tapered spacer, and the force sensor, so as to further enable the force sensor to detect an axial-direction load, so that a wear degree of the drawing die can be detected in real time by using the axial-direction load, and the quality of a wire can be determined in real time.Type: ApplicationFiled: December 28, 2015Publication date: June 8, 2017Inventors: Hsu-Fu Wu, Cheng-Hsueh CHIANG, De-Chang TSAI
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Publication number: 20170151631Abstract: An additive manufacturing apparatus including a supporting plate, an energy source and a temperature control device is provided. A plurality of powder layers are adapted to be stacked on the supporting plate in sequence. The energy source is adapted to provide energy beams to the powder layers in sequence, such that each of the powder layers is at least partially shaped. The temperature control device is adapted to heat the power layers, so as to control a temperature of each of the powder layers being shaped.Type: ApplicationFiled: November 27, 2015Publication date: June 1, 2017Inventors: Che-Nan Kuo, Cheng-Wen Lin, Yu-Lun Su, Meng-Hsiu Tsai, Sebastien Husson, De-Chang Tsai, Cheng-Tsung Kuo, Ying-Cherng Lu, Ho-Chung Fu
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Publication number: 20170151720Abstract: An additive manufacturing method is provided. A plurality of powder layers is stacked on a supporting plate in sequence. Energy beams are provided to the powder layers in sequence by using an energy source, such that each of the powder layers is at least partially shaped. The powder layers are heated by using a temperature control device, so as to control a temperature of each of the powder layers being shaped.Type: ApplicationFiled: November 27, 2015Publication date: June 1, 2017Inventors: Che-Nan Kuo, Cheng-Wen Lin, Yu-Lun Su, Meng-Hsiu Tsai, Sebastien Husson, De-Chang Tsai, Cheng-Tsung Kuo, Ying-Cherng Lu, Ho-Chung Fu
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Publication number: 20170147723Abstract: A method of simulatively predicting a metal solidification microstructure for a continuous casting process is provided, the method including steps of: providing a physical model simulation environment, providing a simulated temperature grid zone, providing an initial condition, calculating a temperature field, performing grain nucleation calculation and performing grain growth calculation. By means of the best metal microstructure, the best setting condition required by actual continuous casting is found, and a metal casting having the best microstructure is obtained.Type: ApplicationFiled: October 25, 2016Publication date: May 25, 2017Inventors: De-Chang TSAI, Chen-Hsueh CHIANG, Chien-Tzu CHENG, Chun-Lin YEH
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Publication number: 20160180994Abstract: A method of manufacturing soft magnetic material, including smelting magnetic and metallic glass forming compositions, to form a uniform molten master alloy block material, melting the master alloy material into liquid, and exerting a force on the liquid master alloy block material to make it into coarse powder. The coarse powder is screened to separate the working powder, and the working powder is put into an additive manufacturing device, to make the working powder melt, cool and condense into the soft magnetic material. The soft magnetic material is made by a simple process, with low iron loss rate and better electromagnetic shielding feature and other properties, and can improve magnetic permeability and save energy when applied to the electronic products.Type: ApplicationFiled: December 19, 2014Publication date: June 23, 2016Inventors: Che-Nan Kuo, De-Chang Tsai, Ho-Chung Fu, Ying-Cheng Lu, Chun-Lin Yeh, Meng-Hsiu Tsai
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Publication number: 20150267966Abstract: A method of fabricating a heat exchanger unit is provided. The method includes forming a first heat exchange component by providing a first inlet interface device; providing a first outlet interface device; providing a first set of pipes; and connecting respective first ends of each of the first set of pipes to the first inlet interface device and connecting a respective second ends of the each of the first set of pipes to the first outlet interface device. The method further includes forming a second heat exchange component in the same fashion as the first heat exchange component. The method also includes overlapping the first and second heat exchange components and cross-coupling the first set of pipes and the second set of pipes at a plurality of joints.Type: ApplicationFiled: March 18, 2014Publication date: September 24, 2015Applicant: Metal Industries Research & Development CentreInventors: Kuo-Wei Lin, Hung-Lu Yen, Tai-Hsin Hsu, Yuan-Chih Lin, Da-Yu Lin, De-Chang Tsai
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Patent number: 9081553Abstract: A power supply includes an integrated cable manager board. The integrated cable manager board is configured to integrate elements of the power supply on the integrated cable manager board. The integrated cable manager board includes a circuit monitoring device and a plurality of connectors. The circuit monitoring device is disposed on the integrated cable manager board and monitors the circuit status of the power supply. The connectors are disposed on the integrated cable manager board and each of the connectors is operable to provide power.Type: GrantFiled: March 21, 2012Date of Patent: July 14, 2015Assignee: DELTA ELECTRONICS, INC.Inventors: Cheng-Yi Lo, De-Chang Jin, Yi-Han Su
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Publication number: 20140035376Abstract: An uninterruptible power system includes a power distribution apparatus and an interruptible power apparatus. The power distribution apparatus has a plurality of power supply units, which receive an external AC power and convert the external AC power into a first DC output power to supply a DC load. The interruptible power apparatus has a plurality of power conversion modules, which receive an external DC power and convert the external DC power into a second DC output power to supply the DC load. The DC load is supplied by the first DC output power when the external AC power normally operates; whereas the DC load is supplied by the second DC output power when the external AC power abnormally operates.Type: ApplicationFiled: September 26, 2012Publication date: February 6, 2014Applicant: DELTA ELECTRONICS, INC.Inventors: Chia-Hsiang LI, Wei-Chun WANG, De-Chang JIN
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Publication number: 20120242297Abstract: A power supply includes an integrated cable manager board. The integrated cable manager board is configured to integrate elements of the power supply on the integrated cable manager board. The integrated cable manager board includes a circuit monitoring device and a plurality of connectors. The circuit monitoring device is disposed on the integrated cable manager board and monitors the circuit status of the power supply. The connectors are disposed on the integrated cable manager board and each of the connectors is operable to provide power.Type: ApplicationFiled: March 21, 2012Publication date: September 27, 2012Applicant: DELTA ELECTRONICS, INC.Inventors: Cheng-Yi LO, De-Chang JIN, Yi-Han SU
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Patent number: 7505325Abstract: In a p-type flash memory array, separate programming and read bit lines are provided. The programming bit line is used only to program the floating gate transistors in the memory cells connected to that bit line. The read bit line is used only to read the state of a floating gate transistor in a selected memory cell connected to that bit line during the operation of the memory circuit. The resulting structure allows the use of low voltages during both programming and operation of the memory array. This makes possible the use of transistors in the memory array with feature sizes less than, for example, 0.18 microns. At the same time variable, unpredictable capacitances associated with each bit line in prior art p-type flash memory structures using comparable low programming voltages are eliminated when a particular memory cell attached to that bit line is being read out.Type: GrantFiled: September 28, 2006Date of Patent: March 17, 2009Assignee: Chingis Technology CorporationInventor: Shang-De Chang
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Publication number: 20080080247Abstract: In a p-type flash memory array, separate programming and read bit lines are provided. The programming bit line is used only to program the floating gate transistors in the memory cells connected to that bit line. The read bit line is used only to read the state of a floating gate transistor in a selected memory cell connected to that bit line during the operation of the memory circuit. The resulting structure allows the use of low voltages during both programming and operation of the memory array. This makes possible the use of transistors in the memory array with feature sizes less than, for example, 0.18 microns. At the same time variable, unpredictable capacitances associated with each bit line in prior art p-type flash memory structures using comparable low programming voltages are eliminated when a particular memory cell attached to that bit line is being read out.Type: ApplicationFiled: September 28, 2006Publication date: April 3, 2008Inventor: Shang-De Chang
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Publication number: 20060244043Abstract: A single-poly two-transistor PMOS memory cell for multiple-time programming applications includes a PMOS floating gate transistor sharing a drain/source P+ diffusion region with a PMOS select gate transistor all formed within a first n-well. A control plate for the floating gate transistor is formed in a second n-well. A single-poly two-transitor PMOS memory cell for one-time programming applications includes a PMOS floating gate transistor having a source formed as a p+ diffusion region in a single n-well. The source is adapted to also serve as control plate for the floating gate transistor.Type: ApplicationFiled: June 16, 2006Publication date: November 2, 2006Inventors: Alex Wang, Shang-De Chang, Han-Chih Lin, Tzeng-Huei Shiau, I-Sheng Liu, Hsien-Wen Liu
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Patent number: 7008283Abstract: In a method for manufacturing a high-brightness planar lamp, a reflecting plate is first provided, and several UV light sources are placed on the reflecting plate. Next, liquid macromolecular polymer is uniformly coated on the reflecting plate and the UV light sources, and fluorescent powder is then uniformly coated on the macromolecular polymer. In another method for manufacturing a high brightness planar lamp, a reflecting plate is first provided, and several UV light sources are placed on the reflecting plate. Next, fluorescent powder and liquid macromolecular polymer are mixed up and uniformly coated on the reflecting plate and the UV light sources. A solidification procedure is then performed. The solidification ways of the mixture of fluorescent powder and macromolecular polymer includes solidification by heating and solidification by illumination of UV light.Type: GrantFiled: February 25, 2003Date of Patent: March 7, 2006Assignee: Candle Laboratory Co., Ltd.Inventors: Chih Yung Liu, De-An Chang, Sheng Chih Wan
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Patent number: 7004081Abstract: The present disclosure discloses a computer desk, comprising a main desk; two side rods, vertically disposed at the side of the main desk; two adjusting members, respectively sheathed into the two side rods, and sliding along the side rod and being secured onto the said side rod; a loading board with one end coupled to an upper section of one of the adjusting members; a supporting stand having a threaded rod on one end and a slightly elevated Y-shape rod on the other end; the threaded rod with a screw nut being disposed in a through pipe at the external lower section of the adjusting member of the loading board, and the open end of the Y-shape rod being secured onto the bottom of the loading board; a side desk, movably foldable on a side of the main desk; and a side desk link rod having one end pivotally coupled to the exterior of another adjusting member, and the other end pivotally coupled to the bottom of the side desk.Type: GrantFiled: March 4, 2003Date of Patent: February 28, 2006Inventor: Wu-De Chang
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Patent number: 6994034Abstract: A computer desk includes a foldable frame and a plurality of desk boards. The desk boards are pivotally connected to the frame and can be folded for storage and unfolded and moved to a horizontal position for use.Type: GrantFiled: March 4, 2003Date of Patent: February 7, 2006Inventor: Wu-De Chang
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Patent number: 6946062Abstract: The present invention is an electropolishing/grinding device for an inner surface of a long tube, including at least one long tube, one electrode, at least two partitions, one fixed magnet mechanism, one driving apparatus and an axial driven mechanism. The fixed magnet mechanism and the driving apparatus form a magnetic levitation effect, which uses magnetic repulsiveness and magnetic attraction to keep the partitions away from the inner surface and avoid an eccentric situation. One of the two partitions has a plurality of springs, a plurality of protruding objects and a plurality of abrasive devices interconnected and firmly touching the inner surface of the tube for grinding.Type: GrantFiled: March 1, 2002Date of Patent: September 20, 2005Assignee: Industrial Technology Research InstituteInventors: Chun-Hung Lin, Chen-Der Tsai, Hann-Tsong Wang, Jiun-Hung Chen, De-Chang Lin
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Publication number: 20050199936Abstract: A single-poly two-transistor PMOS memory cell for multiple-time programming applications includes a PMOS floating gate transistor sharing a drain/source P+ diffusion region with a PMOS select gate transistor all formed within a first n-well. A control plate for the floating gate transistor is formed in a second n-well. A single-poly two-transitor PMOS memory cell for one-time programming applications includes a PMOS floating gate transistor having a source formed as a p+ diffusion region in a single n-well. The source is adapted to also serve as control plate for the floating gate transistor.Type: ApplicationFiled: March 5, 2004Publication date: September 15, 2005Inventors: Alex Wang, Shang-De Chang, Han-Chih Lin, Tzeng-Huei Shiau, I-Sheng Liu, Hsien-Wen Lin