Patents by Inventor Kun-Liang Lai
Kun-Liang Lai 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: 9239356Abstract: The test board serves as an interface for testing a conference phone. The test board includes a plurality of test channel selectors. Each of the test channel selectors receives a plurality of test voltages provided by the conference phone and a first and a second control signals. The test voltages are divided into a plurality test voltage pairs, and each of the test channel selectors selects one of the test voltages in each of the test voltage pairs for generating a plurality of selected voltages according to the first control signal. Each of the test channel selectors selects two of the selected voltages for generating a first and a second output voltages according to the second control signal, where the first and the second output voltages are transmitted to a test machine for testing the conference phone.Type: GrantFiled: May 28, 2013Date of Patent: January 19, 2016Assignee: Wistron CorporationInventors: I-Ming Chen, Chun-Kuan Liu, Kun-Liang Lai
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Patent number: 9188628Abstract: A load apparatus for testing is provided. The load apparatus for testing includes a first comparison circuit, a switch circuit, a voltage-dividing load circuit and a second comparison circuit. The first comparison circuit receives an input voltage from an input terminal and obtains a first sensing voltage according to the input voltage, and compares whether the first sensing voltage is greater than a first reference voltage for providing a first sensing signal. The switch circuit receives the first sensing signal and the input voltage. The switch circuit guides the input voltage to the voltage-dividing load circuit according to the first sensing signal. The voltage-dividing load circuit generates a second sensing voltage according to an input current generated at the input terminal. The second circuit is coupled to the voltage-dividing load circuit and compares whether the input current is greater than a reference current for providing a testing signal.Type: GrantFiled: January 2, 2014Date of Patent: November 17, 2015Assignee: Wistron CorporationInventors: Kung-Hao Chang, Chih-Hao Chang, Kun-Liang Lai
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Patent number: 9141500Abstract: A test board system and method for a power over Ethernet device are disclosed. The test board includes a direct current (DC) power terminal connected to a DC power supply, and includes a network connector, a detection circuit and a classification circuit. The detection and classification circuits are coupled to the network connector and both receive a DC voltage derived from the DC power supply. During different time stages, the detection circuit provides different impedances between the DC power terminal and the network connector. A voltage variation at a test terminal coupled with the network connector shows whether a powered device is connected to the network connector. During a classification stage, the classification circuit provides an impedance device between the DC power terminal and the network connector to build a current path, and classifies the powered device based on a current flowing through the current path.Type: GrantFiled: October 23, 2012Date of Patent: September 22, 2015Assignee: WISTRON CORP.Inventors: Chien-Ju Tu, Kun-Liang Lai, I-Ming Chen
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Publication number: 20150097573Abstract: A load apparatus for testing is provided. The load apparatus for testing includes a first comparison circuit, a switch circuit, a voltage-dividing load circuit and a second comparison circuit. The first comparison circuit receives an input voltage from an input terminal and obtains a first sensing voltage according to the input voltage, and compares whether the first sensing voltage is greater than a first reference voltage for providing a first sensing signal. The switch circuit receives the first sensing signal and the input voltage. The switch circuit guides the input voltage to the voltage-dividing load circuit according to the first sensing signal. The voltage-dividing load circuit generates a second sensing voltage according to an input current generated at the input terminal. The second circuit is coupled to the voltage-dividing load circuit and compares whether the input current is greater than a reference current for providing a testing signal.Type: ApplicationFiled: January 2, 2014Publication date: April 9, 2015Applicant: Wistron CorporationInventors: Kung-Hao Chang, Chih-Hao Chang, Kun-Liang Lai
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Publication number: 20140132292Abstract: A test board is disclosed. The test board serves as an interface for testing a conference phone. The test board includes a plurality of test channel selectors. Each of the test channel selectors receives a plurality of test voltages provided by the conference phone and a first and a second control signals. The test voltages are divided into a plurality test voltage pairs, and each of the test channel selectors selects one of the test voltages in each of the test voltage pairs for generating a plurality of selected voltages according to the first control signal. Each of the test channel selectors selects two of the selected voltages for generating a first and a second output voltages according to the second control signal, where the first and the second output voltages are transmitted to a test machine for testing the conference phone.Type: ApplicationFiled: May 28, 2013Publication date: May 15, 2014Inventors: I-Ming Chen, Chun-Kuan Liu, Kun-Liang Lai
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Publication number: 20130257448Abstract: A test board system and method for a power over Ethernet device are disclosed. The test board includes a direct current (DC) power terminal connected to a DC power supply, and includes a network connector, a detection circuit and a classification circuit. The detection and classification circuits are coupled to the network connector and both receive a DC voltage derived from the DC power supply. During different time stages, the detection circuit provides different impedances between the DC power terminal and the network connector. A voltage variation at a test terminal coupled with the network connector shows whether a powered device is connected to the network connector. During a classification stage, the classification circuit provides an impedance device between the DC power terminal and the network connector to build a current path, and classifies the powered device based on a current flowing through the current path.Type: ApplicationFiled: October 23, 2012Publication date: October 3, 2013Applicant: WISTRON CORP.Inventors: Chien-Ju TU, Kun-Liang LAI, I-Ming CHEN
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Patent number: 8422665Abstract: A telephone device includes a base, a light transmitter, a light penetrating element for penetrating light transmitter from the light transmitter, and a handset. When an end of the handset is on-hook with the base, the end of the handset reflects the light emitted from the light transmitter and penetrating through the light penetrating element back to the light penetrating element. The telephone device further includes a light receiver for receiving the light reflected from the handset when the end of the handset is on-hook with the base, a light concentrating element for concentrating the light emitted from the light transmitter to the light penetrating element, and a control unit for determining whether the end of the handset is on-hook with the base according to whether the light receiver receives the light reflected from the handset.Type: GrantFiled: September 21, 2011Date of Patent: April 16, 2013Assignee: Wistron CorporationInventors: I-Ming Chen, Kun-Liang Lai, Yi-Hung Chen
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Publication number: 20120093307Abstract: A telephone device includes a base, a light transmitter, a light penetrating element for penetrating light transmitter from the light transmitter, and a handset. When an end of the handset is on-hook with the base, the end of the handset reflects the light emitted from the light transmitter and penetrating through the light penetrating element back to the light penetrating element. The telephone device further includes a light receiver for receiving the light reflected from the handset when the end of the handset is on-hook with the base, a light concentrating element for concentrating the light emitted from the light transmitter to the light penetrating element, and a control unit for determining whether the end of the handset is on-hook with the base according to whether the light receiver receives the light reflected from the handset.Type: ApplicationFiled: September 21, 2011Publication date: April 19, 2012Inventors: I-Ming Chen, Kun-Liang Lai, Yi-Hung Chen