Patents by Inventor Chun-Tsung Chen
Chun-Tsung Chen 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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Patent number: 11940692Abstract: An electronic device includes a substrate, a plurality of first retaining walls, a second retaining wall, and a light emitting element. The first retaining walls are arranged on the substrate. The second retaining wall is arranged on the substrate and disposed within one of the first retaining walls. The light emitting element is arranged on the substrate and disposed between the second retaining wall and one of the first retaining walls adjacent to the second retaining wall. In a cross section, there are a first distance between the light emitting element and the one of the first retaining walls, and a second distance between the light emitting element and the second retaining wall, wherein the second distance is smaller than the first distance.Type: GrantFiled: January 19, 2023Date of Patent: March 26, 2024Assignee: INNOLUX CORPORATIONInventors: Wei-Tsung Hsu, Chun-Fang Chen, Wei-Ning Shih
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Patent number: 11931776Abstract: Provided are an actuator, method for manufacturing the actuator, and acoustic transmitter having the actuator. The actuator includes: an elastic metal member having a plurality of curved segments and a plurality of connection segments which constitute a ring structure with a long-axis direction and a short-axis direction; a multilayer piezoelectric member disposed within the ring structure and having a plurality of stacked piezoelectric units along the long-axis direction; and a plurality of coupling members disposed within the ring structure, wherein the multilayer piezoelectric member has two ends in the long-axis direction that are coupled to the connection segments of the elastic metal member in the long-axis direction. A preload stress is imparted to the elastic metal member. A plurality of coupling members having a size corresponding to the preload stress are disposed between the elastic metal member and the multilayer piezoelectric member.Type: GrantFiled: December 26, 2018Date of Patent: March 19, 2024Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chia-Hsin Lin, Ching-Iuan Sheu, Yu-Tsung Chiu, Chun-Ti Chen
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Patent number: 8203234Abstract: A power safety system includes a first MOS, a second MOS, a switch and a body controller. The first MOS is connected between a power input and a power output. The second MOSFET is connected between the power output and a charging output. The switch has an end connected to the body of the first MOS, and the opposite end switched between the source and the drain of the first MOS. A body controller controls the switch according to the voltage at the power input and the voltage at the power output, to connect the body of the first MOS to the source or the drain of the first MOS. By switching the switch, the first MOS will have a parasitic diode effective to prevent a reverse current from the power output to the power input.Type: GrantFiled: March 9, 2010Date of Patent: June 19, 2012Assignee: Richtek Technology Corp.Inventors: Li-Wei Lee, Nien-Hui Kung, Kwan-Jen Chu, Chun-Tsung Chen
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Patent number: 8159195Abstract: The present invention discloses an overvoltage protection (OVP) circuit for use in a charger circuit system, comprising: a power transistor electrically connected between a voltage supply and a battery; an OVP circuit which turns off the transistor when a voltage supply exceeds a threshold value; and a multiplexing circuit electrically connected between an output of the OVP circuit and the gate of the transistor. The present invention also discloses a charger circuit with an OVP function, comprising: a single power transistor electrically connected between a voltage supply and a battery; an OVP control circuit which turns off the power transistor when a voltage supply exceeds a threshold value; and a charger control circuit which controls the gate of the power transistor to determine a charge current to the battery when the voltage supply does not reach the threshold value.Type: GrantFiled: March 10, 2009Date of Patent: April 17, 2012Assignee: Richtek Technology CorporationInventors: Chien-Ping Lu, Nien-Hui Kung, Li-Wei Lee, Kwan-Jen Chu, Ying-Hsin Hsing, Chun-Tsung Chen
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Patent number: 8159138Abstract: A LED driving topology includes a LED array and a current source connected in series between two power inputs receiving a positive voltage and a negative voltage respectively. This topology increases the voltage difference across the LED array and hence has the capability of lighting up more serially connected LEDs, without requiring an additional boost circuit or a high voltage. In addition, the circuit of the current source can be made by a low-voltage manufacturing process.Type: GrantFiled: March 5, 2009Date of Patent: April 17, 2012Assignee: Richtek Technology Corp.Inventors: Chun-Tsung Chen, Chun-Hsiung Chang, Tsan-Huei Wu, Shih-Hui Chen
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Patent number: 8085014Abstract: The present invention discloses a dual power switch and a voltage regulator using the dual power switch. The dual power switch comprises a PMOS power switch and an NMOS power switch connected in parallel and operating according to corresponding predetermined conditions, respectively.Type: GrantFiled: February 17, 2009Date of Patent: December 27, 2011Assignee: Richtek Technology CorporationInventors: Nien-Hui Kung, Kwan-Jen Chu, Chun-Tsung Chen, Tzu-Huan Chiu
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Patent number: 8018280Abstract: A class-D audio amplifier is protected by thermal regulation which decreases the gain of the class-D audio amplifier by asserting an over-temperature signal when the temperature of the class-D audio amplifier is detected to be higher than a threshold. The output of the class-D audio amplifier is therefore reduced by the smaller gain, and the chance for the class-D audio amplifier to stop working due to overheating is greatly reduced.Type: GrantFiled: November 5, 2009Date of Patent: September 13, 2011Assignee: Richtek Technology Corp.Inventors: Chun-Tsung Chen, Jwin-Yen Guo, Chung-Fu Wang
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Publication number: 20100231047Abstract: A power safety system includes a first MOS, a second MOS, a switch and a body controller. The first MOS is connected between a power input and a power output. The second MOSFET is connected between the power output and a charging output. The switch has an end connected to the body of the first MOS, and the opposite end switched between the source and the drain of the first MOS. A body controller controls the switch according to the voltage at the power input and the voltage at the power output, to connect the body of the first MOS to the source or the drain of the first MOS. By switching the switch, the first MOS will have a parasitic diode effective to prevent a reverse current from the power output to the power input.Type: ApplicationFiled: March 9, 2010Publication date: September 16, 2010Applicant: RICHTEK TECHNOLOGY CORP.Inventors: LI-WEI LEE, NIEN-HUI KUNG, KWAN-JEN CHU, CHUN-TSUNG CHEN
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Publication number: 20100117731Abstract: A class-D audio amplifier is protected by thermal regulation which decreases the gain of the class-D audio amplifier by asserting an over-temperature signal when the temperature of the class-D audio amplifier is detected to be higher than a threshold. The output of the class-D audio amplifier is therefore reduced by the smaller gain, and the chance for the class-D audio amplifier to stop working due to overheating is greatly reduced.Type: ApplicationFiled: November 5, 2009Publication date: May 13, 2010Inventors: Chun-Tsung Chen, Jwin-Yen Guo, Chung-Fu Wang
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Publication number: 20100066312Abstract: The present invention discloses an overvoltage protection (OVP) circuit for use in a charger circuit system, comprising: a power transistor electrically connected between a voltage supply and a battery; an OVP circuit which turns off the transistor when a voltage supply exceeds a threshold value; and a multiplexing circuit electrically connected between an output of the OVP circuit and the gate of the transistor. The present invention also discloses a charger circuit with an OVP function, comprising: a single power transistor electrically connected between a voltage supply and a battery; an OVP control circuit which turns off the power transistor when a voltage supply exceeds a threshold value; and a charger control circuit which controls the gate of the power transistor to determine a charge current to the battery when the voltage supply does not reach the threshold value.Type: ApplicationFiled: March 10, 2009Publication date: March 18, 2010Inventors: Chien-Ping Lu, Nien-Hui Kung, Li-Wei Lee, Kwan-Jen Chu, Ying-Hsin Hsing, Chun-Tsung Chen
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Publication number: 20100060233Abstract: A charger for a battery system detects the voltage level of a data pin of the battery system to determine whether an external power source plugged in to the battery system is a USB voltage source. When the external power source is a USB voltage source, the charger will provide power for a USB transceiver of the battery system or enable it.Type: ApplicationFiled: September 2, 2009Publication date: March 11, 2010Inventors: Nien-Hui Kung, Chun-Tsung Chen
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Publication number: 20090174388Abstract: The present invention discloses a dual power switch and a voltage regulator using the dual power switch. The dual power switch comprises a PMOS power switch and an NMOS power switch connected in parallel and operating according to corresponding predetermined conditions, respectively.Type: ApplicationFiled: February 17, 2009Publication date: July 9, 2009Inventors: Nien-Hui Kung, Kwan-Jen Chu, Chun-Tsung Chen, Tzu-Huan Chiu
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Patent number: 7148666Abstract: A direct current voltage boosting/bucking device includes a direct current voltage boosting circuit and a low drop-out (LDO) linear voltage converting circuit. The direct current voltage boosting circuit boosts an input voltage so as to generate an output voltage higher than the input voltage. The LDO linear voltage converting circuit converts the output voltage into a load voltage that is to be provided to a load, and controls the direct current voltage boosting circuit in accordance with a feedback signal from the load such that the output voltage and the load voltage have a minimum drop-out voltage differential therebetween and such that current flow through the load is maintained at a determined level.Type: GrantFiled: July 18, 2005Date of Patent: December 12, 2006Assignee: Richtek Technology Corp.Inventors: Liang-Pin Tai, Chun-Tsung Chen, Chin-Chiang Yeh, Po-Shun Chung, Kwan-Jen Chu, Chung-Lung Pai
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Publication number: 20060261790Abstract: A direct current voltage boosting/bucking device includes a direct current voltage boosting circuit and a low drop-out (LDO) linear voltage converting circuit. The direct current voltage boosting circuit boosts an input voltage so as to generate an output voltage higher than the input voltage. The LDO linear voltage converting circuit converts the output voltage into a load voltage that is to be provided to a load, and controls the direct current voltage boosting circuit in accordance with a feedback signal from the load such that the output voltage and the load voltage have a minimum drop-out voltage differential therebetween and such that current flow through the load is maintained at a determined level.Type: ApplicationFiled: July 18, 2005Publication date: November 23, 2006Inventors: Liang-Pin Tai, Chun-Tsung Chen, Chin-Chiang Yeh, Po-Shun Chung, Kwan-Jen Chu, Chung-Lung Pai