Patents by Inventor Yann-Hsiung Liang
Yann-Hsiung Liang 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: 11361706Abstract: A micro-LED display system is disclosed. The micro-LED display system includes a host, a plurality of row/column drivers and a plurality of ?ICs. The row/column drivers are coupled to the host through serial interfaces and used to provide a plurality of row clock signals and a plurality of column data signals respectively. The ?ICs are arranged as a matrix including columns of ?ICs and rows of ?ICs receiving the column data signals and the row clock signals respectively. All ?ICs in the same column of ?ICs are cascaded in order and all ?ICs in the same row of ?ICs are cascaded in order.Type: GrantFiled: January 8, 2021Date of Patent: June 14, 2022Assignee: Raydium Semiconductor CorporationInventors: Kuan-Hsien Lee, Chien-Yu Chan, Yann-Hsiung Liang, Yu-Lung Lo
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Publication number: 20210217354Abstract: A micro-LED display system is disclosed. The micro-LED display system includes a host, a plurality of row/column drivers and a plurality of ?ICs. The row/column drivers are coupled to the host through serial interfaces and used to provide a plurality of row clock signals and a plurality of column data signals respectively. The ?ICs are arranged as a matrix including columns of ?ICs and rows of ?ICs receiving the column data signals and the row clock signals respectively. All ?ICs in the same column of ?ICs are cascaded in order and all ?ICs in the same row of ?ICs are cascaded in order.Type: ApplicationFiled: January 8, 2021Publication date: July 15, 2021Inventors: Kuan-Hsien Lee, Chien-Yu Chan, Yann-Hsiung Liang, Yu-Lung Lo
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Patent number: 8736373Abstract: An output buffer of a source driver is disclosed. The output buffer includes a buffer input, a buffer output, a differential input stage, a bias current source, an output stage, a compensation capacitor, and a comparator. The output stage and the comparator are both operated between an analog supply voltage (AVDD) and a ground voltage (AGND). The comparator compares an input voltage and an output voltage and outputs a control signal to the bias current source according to the compared result to control a bias current outputted by the bias current source to enhance the slew rate of the output buffer.Type: GrantFiled: March 30, 2012Date of Patent: May 27, 2014Assignee: Raydium Semiconductor CorporationInventors: Chien-Ming Chen, Yann-Hsiung Liang, Hui-Wen Miao, Ko-Yang Tso
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Patent number: 8736372Abstract: An output buffer of a source driver is disclosed. The output buffer includes a buffer input, a buffer output, a differential input stage, a bias current source, an output stage, a compensation capacitor, and a comparator. The output stage and the comparator are both operated between an analog supply voltage (AVDD) and a half analog supply voltage (HAVDD), or both operated between the half analog supply voltage (HAVDD) and a ground voltage. The comparator compares an input signal with an output signal and outputs a control signal to the bias current source according to the compared result.Type: GrantFiled: March 30, 2012Date of Patent: May 27, 2014Assignee: Raydium Semiconductor CorporationInventors: Chien-Ming Chen, Yann-Hsiung Liang, Hui-Wen Miao, Ko-Yang Tso
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Patent number: 8659332Abstract: A signal circuit includes a clock terminal for transmitting a reference clock and a data terminal for transmitting an input/output data. In an embodiment, the frequency of the reference clock is one-eighth of the bit rate of the input/output data.Type: GrantFiled: January 4, 2012Date of Patent: February 25, 2014Assignee: Raydium Semiconductor CorporationInventors: Ko-Yang Tso, Hui-Wen Miao, Yann-Hsiung Liang, Chin-Chieh Chao, Ren-Feng Huang
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Publication number: 20120249245Abstract: An output buffer of a source driver is disclosed. The output buffer includes a buffer input, a buffer output, a differential input stage, a bias current source, an output stage, a compensation capacitor, and a comparator. The output stage and the comparator are both operated between an analog supply voltage (AVDD) and a ground voltage (AGND). The comparator compares an input voltage and an output voltage and outputs a control signal to the bias current source according to the compared result to control a bias current outputted by the bias current source to enhance the slew rate of the output buffer.Type: ApplicationFiled: March 30, 2012Publication date: October 4, 2012Inventors: Chien-Ming Chen, Yann-Hsiung Liang, Hui-Wen Miao, Ko-Yang Tso
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Publication number: 20120249244Abstract: An output buffer of a source driver is disclosed. The output buffer includes a buffer input, a buffer output, a differential input stage, a bias current source, an output stage, a compensation capacitor, and a comparator. The output stage and the comparator are both operated between an analog supply voltage (AVDD) and a half analog supply voltage (HAVDD), or both operated between the half analog supply voltage (HAVDD) and a ground voltage. The comparator compares an input signal with an output signal and outputs a control signal to the bias current source according to the compared result.Type: ApplicationFiled: March 30, 2012Publication date: October 4, 2012Inventors: Chien-Ming Chen, Yann-Hsiung Liang, Hui-Wen Miao, Ko-Yang Tso
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Publication number: 20120176168Abstract: A signal circuit includes a clock terminal for transmitting a reference clock and a data terminal for transmitting an input/output data. In an embodiment, the frequency of the reference clock is one-eighth of the bit rate of the input/output data.Type: ApplicationFiled: January 4, 2012Publication date: July 12, 2012Applicant: RAYDIUM SEMICONDUCTOR CORPORATIONInventors: Ko-Yang Tso, Hui-Wen Miao, Yann-Hsiung Liang, Chin-Chieh Chao, Ren-Feng Huang
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Patent number: 8018282Abstract: The invention discloses a driving circuit system and a method of elevating a slew rate of an operational amplifier. The driving circuit system comprises an operational amplifier, a judging module and a bias enhancing module. The operational amplifier has an input stage driven by a bias current. The bias enhancing module is electrically connected to the judging module and the input stage of the operational amplifier respectively. The judging module is used to generate a bias enhancing signal according to an edge-trigger of a control signal. When the bias enhancing module receives the bias enhancing signal, the bias enhancing module provides an additional current, which cooperates with the bias current, for driving the input stage of the operational amplifier, so as to elevating a slew rate of the operational amplifier.Type: GrantFiled: October 15, 2009Date of Patent: September 13, 2011Assignee: Raydium Semiconductor CorporationInventors: Yann-Hsiung Liang, Ko-Yang Tso, Chin-Chieh Chao
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Publication number: 20110122102Abstract: An output buffer including a first switch circuit and a buffer is provided. The first switch circuit receives first and second input signals. The buffer circuit includes first and second input stages, first and second output stages and a second switch circuit. The first and the second input stages are coupled to the first switch circuit. The first and the second output stages are coupled to the second switch circuit. The second switch circuit, coupled to the first and the second input stages and the first and the second output stages, selectively couples one of first and the second input stages to the first output stage and selectively couples the other to the second output stage. The first switch circuit further selectively provides one of the first and the second input signals to the first input stage and selectively provides the other to the second input stage.Type: ApplicationFiled: October 7, 2010Publication date: May 26, 2011Applicant: RAYDIUM SEMICONDUCTOR CORPORATIONInventors: Ko-Yang Tso, Hui-Wen Miao, Yu-Lung Lo, Yann-Hsiung Liang, Hsin-Yeh Wu
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Publication number: 20100164929Abstract: The invention discloses a source driver. The source driver comprises a plurality of channels and a control module. Each of the plurality of channels comprises an output buffer, an output pad, a driving switch, and a charge sharing switch. The control module is used to control a gate signal of the driving switch or the charge sharing switch in each channel to be changed linearly. By doing so, a peak current generated by the source driver can be lowered to reduce the electromagnetic interference (EMI).Type: ApplicationFiled: October 14, 2009Publication date: July 1, 2010Applicant: RAYDIUM SEMICONDUCTOR CORPORATIONInventors: Yi Cheng Chen, Yann Hsiung Liang, Chin Chieh Chao, Hui Wen Miao, Ko Yang Tso
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Publication number: 20100097142Abstract: The invention discloses a driving circuit system and a method of elevating a slew rate of an operational amplifier. The driving circuit system comprises an operational amplifier, a judging module and a bias enhancing module. The operational amplifier has an input stage driven by a bias current. The bias enhancing module is electrically connected to the judging module and the input stage of the operational amplifier respectively. The judging module is used to generate a bias enhancing signal according to an edge-trigger of a control signal. When the bias enhancing module receives the bias enhancing signal, the bias enhancing module provides an additional current, which cooperates with the bias current, for driving the input stage of the operational amplifier, so as to elevating a slew rate of the operational amplifier.Type: ApplicationFiled: October 15, 2009Publication date: April 22, 2010Applicant: RAYDIUM SEMICONDUCTOR CORPORATIONInventors: Yann Hsiung Liang, Ko Yang Tso, Chin Chieh Chao
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Patent number: 7595690Abstract: A voltage-clamping device used in an operational amplifier is provided. The operational amplifier comprises a first transistor. The cross-voltage between the gate and the source of the first transistor is near to a specific voltage and the cross-voltage between the drain and the source of the first transistor is not equal to zero, so as to generate a big substrate current. The voltage-clamping device comprises a second transistor whose source and gate are respectively coupled to the drain of the first transistor and used for receiving a bias signal, so that the second transistor is biased in saturation region, and the voltage at the source of the second transistor is made equal to the difference between the bias signal and the threshold voltage of the second transistor. Thus, the cross-voltage between the drain and the source of the first transistor is reduced and the substrate current is reduced accordingly.Type: GrantFiled: April 7, 2008Date of Patent: September 29, 2009Assignee: Raydium Semiconductor CorporationInventors: Ko-Yang Tso, Keh-La Lin, Yann-Hsiung Liang, Chin-Chieh Chao
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Publication number: 20080252375Abstract: A voltage-clamping device used in an operational amplifier is provided. The operational amplifier comprises a first transistor. The cross-voltage between the gate and the source of the first transistor is near to a specific voltage and the cross-voltage between the drain and the source of the first transistor is not equal to zero, so as to generate a big substrate current. The voltage-clamping device comprises a second transistor whose source and gate are respectively coupled to the drain of the first transistor and used for receiving a bias signal, so that the second transistor is biased in saturation region, and the voltage at the source of the second transistor is made equal to the difference between the bias signal and the threshold voltage of the second transistor. Thus, the cross-voltage between the drain and the source of the first transistor is reduced and the substrate current is reduced accordingly.Type: ApplicationFiled: April 7, 2008Publication date: October 16, 2008Applicant: Raydium Semiconductor CorporationInventors: Ko-Yang Tso, Keh-La Lin, Yann-Hsiung Liang, Chin-Chieh Chao