Patents by Inventor Chin-Chi Chang
Chin-Chi 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: 20240066669Abstract: A high-precision and high-torsion ratchet wrench comprises a handle head. A center mounting through hole is formed in the middle of a top surface of the handle head. A ratchet head is inserted into the center mounting through hole. A first outer tooth part and a second outer tooth part which longitudinally correspond to each other are formed on an outer wall of the ratchet head. Teeth of the first outer tooth part are located right above the middle of corresponding tooth sockets of the second outer tooth part. Teeth of the second outer tooth part are located right below the middle of corresponding tooth sockets of the first outer tooth part. The first outer tooth part and the second outer tooth part are disposed on the outer wall of the ratchet head.Type: ApplicationFiled: November 23, 2022Publication date: February 29, 2024Applicant: Zhejiang Toolking Hardware & Tools Co.,Ltd.Inventors: Chin-man CHANG, Fong-chi CHANG
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Patent number: 11737141Abstract: One wireless communication device includes a transmitter circuit and a control circuit, wherein the control circuit sets a request to send (RTS) frame, and controls the transmitter circuit to transmit the RTS frame via at least one channel excluding a preamble punctured channel. Another wireless communication device includes a transmitter circuit and a control circuit, wherein the control circuit sets an RTS frame, and controls the transmitter circuit to transmit the RTS frame via a plurality of channels including the preamble punctured channel.Type: GrantFiled: June 21, 2021Date of Patent: August 22, 2023Assignee: MEDIATEK INC.Inventors: Cheng-Yi Chang, Chao-Wen Chou, Kun-Sheng Huang, Chin-Chi Chang
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Publication number: 20210400728Abstract: One wireless communication device includes a transmitter circuit and a control circuit, wherein the control circuit sets a request to send (RTS) frame, and controls the transmitter circuit to transmit the RTS frame via at least one channel excluding a preamble punctured channel. Another wireless communication device includes a transmitter circuit and a control circuit, wherein the control circuit sets an RTS frame, and controls the transmitter circuit to transmit the RTS frame via a plurality of channels including the preamble punctured channel.Type: ApplicationFiled: June 21, 2021Publication date: December 23, 2021Applicant: MEDIATEK INC.Inventors: Cheng-Yi Chang, Chao-Wen Chou, Kun-Sheng Huang, Chin-Chi Chang
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Patent number: 8390262Abstract: The present invention relates to methods for LED driver applications, comprising the steps: providing an input voltage, Vin; generating an output voltage, Vout, for driving a plurality of LED channels, wherein a boost converter is used to convert the input voltage Vin to the output voltage Vout; determining a lowest voltage, VLVS, from the LED channels; generating a comparator voltage, Vcomp, by comparing the lowest voltage of the channels, VLVS, with a feedback reference voltage, VFBREF, wherein the feedback reference voltage, VFBREF, and a LED current, ILED, for the LED channels are determined by a current ISET; generating a summed voltage, Vsum, for stabilizing the output voltage, Vout; and generating a PWM voltage, VPWM, as a function of the Vcomp and the Vsum to control the output voltage, Vout.Type: GrantFiled: November 17, 2009Date of Patent: March 5, 2013Assignee: LePower Semiconductor Inc.Inventors: Ronald Chang, Chin-Chi Chang, Chung-Kuang Huang
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Publication number: 20110215011Abstract: A retaining structure with double-face carrier function includes a carrier unit, an elastic unit and a retaining unit. The carrier unit has a carrier body and a through hole passing through the carrier body. The elastic unit has a plurality of elastic arms extended from an inner surface of the through hole. The retaining unit has a plurality of retaining elements passing through the through hole. Each retaining element has a retaining portion connected to at least two of the elastic arms and extended above and under the through hole, a pressing portion extended inwards from one end of the retaining portion and at least one protrusion portion disposed on an outer surface of the retaining portion and adjacent to the pressing portion. The pressing portions above the through hole are arranged alternately and the pressing portions under the through hole are arranged alternately.Type: ApplicationFiled: March 4, 2010Publication date: September 8, 2011Inventors: CHIN-CHI CHANG, HSUN-CHENG CHAN, HUI-CHI HUANG
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Publication number: 20100289424Abstract: The present invention relates to methods for LED driver applications, comprising the steps: providing an input voltage, Vin; generating an output voltage, Vout, for driving a plurality of LED channels, wherein a boost converter is used to convert the input voltage Vin to the output voltage Vout; determining a lowest voltage, VLVS, from the LED channels; generating a comparator voltage, Vcomp, by comparing the lowest voltage of the channels, VLVS, with a feedback reference voltage, VFBREF, wherein the feedback reference voltage, VFBREF, and a LED current, ILED, for the LED channels are determined by a current ISET; generating a summed voltage, Vsum, for stabilizing the output voltage, Vout; and generating a PWM voltage, VPWM, as a function of the Vcomp and the Vsum to control the output voltage, Vout.Type: ApplicationFiled: November 17, 2009Publication date: November 18, 2010Applicant: LEPOWER SEMICONDUCTOR INC.Inventors: Ronald Chang, Chin-Chi Chang, Chung-Kuang Huang
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Patent number: 7691463Abstract: A rewritable phase change optical recording medium includes a substrate, a dielectric layer deposited on a surface of the substrate, and an optical recording layer deposited on the dielectric layer, wherein the dielectric layer may be omitted. The optical recording layer contains a composition of GexSb100-x-y-zMyEz, wherein 0.5?x?14.5; 0.5?y?14.5; 0?z?14.5; and M and E are different and are selected from the group consisting of Te, Cr, V, Ti, Ag, Sn, Si, Bi, Se, Al, Au, Ni, Fe, Cu, Mn, O, Ga, Cd, In, Pb and Hf, wherein M is not Te, when x is zero; and E is not Sn, when M is Te. The optical recording composition has a small crystal grain, a high ratio of reflectivity of the amorphous phase to that of the crystalline phase thereof, and a high crystallization rate, so that a blue light laser can be used to write/erase the recording medium.Type: GrantFiled: November 24, 2004Date of Patent: April 6, 2010Assignee: Industrial Technology Research InstituteInventors: Lih-Hsin Chou, Mei-Rurng Tseng, Chung-Chih Chang, Chin-Chi Chang, Shun-Te Cheng, Chien-Ming Huang, Feng-Pin Hsu, Wei-Chih Hsu, Song-Yeu Tsai, Ming-Hsun Hsieh
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Publication number: 20080017534Abstract: A multiple optical disc storage case includes a upper cover, a lower supporting plate, an outer fastener, and a plurality of inner hooks. The upper cover is hollow, and the lower supporting plate is used to assemble with the upper cover. The outer fastener is positioned at one of the upper cover and a lower supporting plate, and has at least one outer hook, at least one stop block and a plurality of resilient block. The outer hooks and the stop blocks are positioned at one side of the outer fastener, and the resilient blocks are equally separated and positioned at the other side of the outer fastener. The outer fastener also has a plurality of inner hooks positioned at the other of the upper case and the lower supporting plate so that the inner hooks are hooked up with the outer hooks.Type: ApplicationFiled: July 19, 2006Publication date: January 24, 2008Inventors: Ming-Chien Lo, Chin-Chi Chang, Hsun-Cheng Chan, Hui-Chi Huang
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Patent number: 7305027Abstract: This invention discloses a receiver and a signal compensation method therefor. An adaptive equalizer and a baseline wander compensator are provided on the front end of the receiver to improve the quality of output signals. The signal compensation method enables the adaptive equalizer to use a long T as its observation unit when the transmission cable is idle, and enables the baseline wander compensator for operation and controls both the adaptive equalizer and the baseline wander compensator to use a short T as its observation unit when the transmission cable is transmitting data signals. The disclosed adaptive equalizer can achieve its optimal processing effects, and the efficiency of the baseline wander compensator can be increased.Type: GrantFiled: June 28, 2002Date of Patent: December 4, 2007Assignee: Via Technologies, Inc.Inventors: Chin-Chi Chang, Chu-Yu Hsiao, Yu-En Tzeng, Ming-Yu Wu
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Publication number: 20070158218Abstract: A disc box structure according to the present invention includes a shell and an auxiliary support. The shell has a base, and a stand protruding upwardly from the base for accommodating a disc. The auxiliary support includes a pivot connected to the base, a lateral arm arranged to a side of the pivot, a pressing portion disposed over the lateral arm, and a stand connected to an opposite side of the pivot. Therefore, the pressing portion is pressed down to release the disc in order to lift the auxiliary support upwards, so that the disc is raised for easy removal.Type: ApplicationFiled: January 12, 2006Publication date: July 12, 2007Inventors: Hsun-Cheng Chan, Chin-Chi Chang, Ming-Chien Lo, Hui-Chi Huang
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Patent number: 7236739Abstract: The present invention details a novel application of wireless networking and digital music technologies to achieve coordinated and synchronized music playback among peer listeners connected by wireless ad-hoc networks. Two or more listeners in local proximity allowed by short-range wireless transmission can participate and listen to the same song at the same time. Moreover, the present invention allows listeners in the transmission range to discover each other through profile matching. A high matching score may indicate similar preference or taste to a certain music style thereby easily locating mutual interests, which would not have been possible.Type: GrantFiled: June 29, 2004Date of Patent: June 26, 2007Inventor: Chin-chi Chang
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Patent number: 7136421Abstract: A signal compensation circuit and associated method dynamically compensate for signal baseline wandering in a transmission line. The compensation circuit has a detection circuit and a correction circuit. The detection circuit first compares a transmission signal with a reference level and generates a comparison result. The correction circuit then corrects the transmission signal according to the comparison result. The compensation circuit can adjust its compensation over time based on the quality of the transmission signal.Type: GrantFiled: August 8, 2002Date of Patent: November 14, 2006Assignee: VIA Technologies Inc.Inventors: Jyh-Fong Lin, Chu-Yu Hsiao, Chin-Chi Chang, Ming-Yu Wu
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Patent number: 7103123Abstract: This invention discloses an adaptive equalizer disposed on the front end of a receiver to improve the quality of a transmission signal comprising a data signal from a transmission cable. The signal compensation of the adaptive equalizer uses a long T as its observation unit when the transmission cable is idle, and uses a short T as its observation unit when the transmission cable is transmitting data signals. This invention further discloses a baseline wander compensator worked with the adaptive equalizer during the transmitting data period of the transmission cable. The disclosed adaptive equalizer can achieve its optimal processing effects.Type: GrantFiled: July 29, 2002Date of Patent: September 5, 2006Assignee: VIA Technologies, Inc.Inventors: Chin-Chi Chang, Chu-Yu Hsiao, Yu-En Tzeng, Ming-Yu Wu
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Patent number: 7092534Abstract: A method and system are disclosed for controlling pop noises in a sound broadcasting system. After controllably connecting an output of a drive amplifier to a first predetermined low voltage level through a first switch, a first portion of an operation control data set is input to a digital-to-analog converter (DAC) circuit for driving an output thereof to a second predetermined low voltage level, and a second portion of the operation control data set is also input to the DAC circuit and further to the drive amplifier to bring the output of the drive amplifier to a common mode voltage level over a predetermined rise-up time period for controlling the pop noises.Type: GrantFiled: June 7, 2004Date of Patent: August 15, 2006Assignee: VIA Telecom Co., Ltd.Inventors: Yuhe Wang, Peter P. White, Daniel Ho, Frank Nguyen, Chin-Chi Chang, Jeetin Rathore
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Publication number: 20060110567Abstract: A rewritable phase change optical recording medium includes a substrate, a dielectric layer deposited on a surface of the substrate, and an optical recording layer deposited on the dielectric layer, wherein the dielectric layer may be omitted. The optical recording layer contains a composition of GexSb100-x-y-zMyEz, wherein 0.5?x?14.5; 0.5?y?14.5; 0?z?14.5; and M and E are different and are selected from the group consisting of Te, Cr, V, Ti, Ag, Sn, Si, Bi, Se, Al, Au, Ni, Fe, Cu, Mn, O, Ga, Cd, In, Pb and Hf, wherein M is not Te, when x is zero; and E is not Sn, when M is Te. The optical recording composition has a small crystal grain, a high ratio of reflectivity of the amorphous phase to that of the crystalline phase thereof, and a high crystallization rate, so that a blue light laser can be used to write/erase the recording medium.Type: ApplicationFiled: November 24, 2004Publication date: May 25, 2006Applicant: Industrial Technology Research InstituteInventors: Lih-Hsin Chou, Mei-Rurng Tseng, Chung-Chih Chang, Chin-Chi Chang, Shun-Te Cheng, Chien-Ming Huang, Feng-Pin Hsu, Wei-Chih Hsu, Song-Yeu Tsai, Ming-Hsun Hsieh
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Publication number: 20050204118Abstract: The present invention is a method for inter-cluster communication that employs register permutation by dynamically mapping the registers to the functional units. Because only the mapping between registers and functional units is changed and no actual data movement occurs, the present invention greatly diminishes the power consumption. Owing to the inter-cluster communication mechanism, a centralized register file can be replaced with small register sub-blocks, where the silicon area is greatly reduced, and the access time and the power consumption are also diminished.Type: ApplicationFiled: February 27, 2004Publication date: September 15, 2005Inventors: Chein-Wei Jen, Tay-Jyi Lin, Chen-Chia Lee, Chin-Chi Chang, Chih-Wei Liu
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Publication number: 20050195991Abstract: A method and system are disclosed for controlling pop noises in a sound broadcasting system. After controllably connecting an output of a drive amplifier to a first predetermined low voltage level through a first switch, a first portion of an operation control data set is input to a digital-to-analog converter (DAC) circuit for driving an output thereof to a second predetermined low voltage level, and a second portion of the operation control data set is also input to the DAC circuit and further to the drive amplifier to bring the output of the drive amplifier to a common mode voltage level over a predetermined rise-up time period for controlling the pop noises.Type: ApplicationFiled: June 7, 2004Publication date: September 8, 2005Inventors: Yuhe Wang, Peter White, Daniel Ho, Frank Nguyen, Chin-Chi Chang, Jeetin Rathore
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Patent number: 6935975Abstract: A sports racquet extending along a longitudinal axis. The racquet includes a head portion and a handle portion. The head portion defines a string bed area. The handle portion has a distal end and a proximal end. The distal end of the handle portion is coupled to the head portion. The handle portion has a length and an outer surface. The handle portion includes at least two spaced apart channels. Each channel inwardly extends into the outer surface and extends generally parallel to the longitudinal axis from the distal end of the handle portion and over at least a portion of the length of the handle portion. Each channel is configured for receiving at least one string and for guiding the string along at least a portion of the length of the handle portion.Type: GrantFiled: April 10, 2003Date of Patent: August 30, 2005Assignees: Wilson Sporting Goods Co., Li Mao Sports Co., Inc.Inventors: Chin-Chi Chang, Po-Jen Cheng
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Publication number: 20040248601Abstract: The present invention details a novel application of wireless networking and digital music technologies to achieve coordinated and synchronized music playback among peer listeners connected by wireless ad-hoc networks. Two or more listeners in local proximity allowed by short-range wireless transmission can participate and listen to the same song at the same time. Moreover, the present invention allows listeners in the transmission range to discover each other through profile matching. A high matching score may indicate similar preference or taste to a certain music style thereby easily locating mutual interests, which would not have been possible.Type: ApplicationFiled: June 29, 2004Publication date: December 9, 2004Inventor: Chin-chi Chang
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Publication number: 20040204270Abstract: A sports racquet extending along a longitudinal axis. The racquet includes a head portion and a handle portion. The head portion defines a string bed area. The handle portion has a distal end and a proximal end. The distal end of the handle portion is coupled to the head portion. The handle portion has a length and an outer surface. The handle portion includes at least two spaced apart channels. Each channel inwardly extends into the outer surface and extends generally parallel to the longitudinal axis from the distal end of the handle portion and over at least a portion of the length of the handle portion. Each channel is configured for receiving at least one string and for guiding the string along at least a portion of the length of the handle portion.Type: ApplicationFiled: April 10, 2003Publication date: October 14, 2004Applicants: Wilson Sporting Goods Co., Lli Mao Sports, Co., Inc.Inventors: Chin-Chi Chang, Po-Jen Cheng