Patents by Inventor Yung-Ching Chang
Yung-Ching 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: 20240139142Abstract: Provided is a method for preventing or treating a liver disease, including administering a therapeutically effective amount of pharmaceutical composition to a subject in need, and the pharmaceutical composition includes the isothiocyanate structural modified compound and a pharmaceutically acceptable carrier thereof.Type: ApplicationFiled: September 14, 2023Publication date: May 2, 2024Applicants: TAIPEI VETERANS GENERAL HOSPITAL, NATIONAL YANG MING CHIAO TUNG UNIVERSITY, PHARMAESSENTIA CORPORATIONInventors: Jaw-Ching WU, Yung-Sheng CHANG, Kuo-Hsi KAO, Chan-Kou HWANG, Ko-Chung LIN
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Publication number: 20240126327Abstract: The present disclosure provides an electronic wearable device. The electronic wearable device includes a first module having a first contact and a second module having a second contact. The first contact is configured to keep electrical connection with the second contact in moving with respect to each other during a wearing period.Type: ApplicationFiled: October 14, 2022Publication date: April 18, 2024Applicant: Advanced Semiconductor Engineering, Inc.Inventors: Chao Wei LIU, Wei-Hao CHANG, Yung-I YEH, Jen-Chieh KAO, Tun-Ching PI, Ming-Hung CHEN, Hui-Ping JIAN, Shang-Lin WU
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Publication number: 20180127881Abstract: A process for producing aluminum-based metal composite, an aluminum-based composite obtained by using the same, and an aluminum-based structure having the said aluminum-based composite are provided. The aluminum-based metal treating method applies borax on the surface of an aluminum-based metal and heats such metal to a temperature over the melting point of borax. The aluminum-based composite includes aluminum in the range of 7 to 9 atomic %, sodium in the range of 11 to 13 atomic %, and oxygen in the range of 79 to 81 atomic %. The aluminum-based structure includes an aluminum-based substrate formed by an aluminum-based metal and an aluminum-based composite disposed in the aluminum based substrate.Type: ApplicationFiled: November 10, 2016Publication date: May 10, 2018Inventors: YUNG-CHING CHANG, CHIA-HUNG CHANG
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Patent number: 8684579Abstract: An electronic device includes a display module, a base and a keyboard module. The display module is pivoted on the base. The keyboard module is disposed on the base. The keyboard module has a plurality of keys. Each of the keys includes a main body and an imprinted structure. The main body has a top surface. The imprinted structure is disposed on the top surface of the main body and includes a light guiding portion and a light scattering portion. A light emitted by the display module illuminates the keyboard module. The light is guided towards a specific direction when the light passes through the light guiding portion, and the light is scattered in other directions when the light passes through the light scattering portion.Type: GrantFiled: May 22, 2012Date of Patent: April 1, 2014Assignee: Compal Electronics, Inc.Inventors: Wan-Li Chuang, Chien-Min Chang, Li-Jung Yu, Mei-Hsiung Tsai, Yung-Ching Chang, Ju-Chen Chiu
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Publication number: 20130265799Abstract: An electronic device includes a display module, a base and a keyboard module. The display module is pivoted on the base. The keyboard module is disposed on the base. The keyboard module has a plurality of keys. Each of the keys includes a main body and an imprinted structure. The main body has a top surface. The imprinted structure is disposed on the top surface of the main body and includes a light guiding portion and a light scattering portion. A light emitted by the display module illuminates the keyboard module. The light is guided towards a specific direction when the light passes through the light guiding portion, and the light is scattered in other directions when the light passes through the light scattering portion.Type: ApplicationFiled: May 22, 2012Publication date: October 10, 2013Applicant: COMPAL ELECTRONICS, INC.Inventors: Wan-Li Chuang, Chien-Min Chang, Li-Jung Yu, Mei-Hsiung Tsai, Yung-Ching Chang, Ju-Chen Chiu
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Publication number: 20130046192Abstract: An image-based PWV measurement device and method are provided. The measurement device comprises at least two light emitting units respectively projecting light beams to at least two detected regions on body surface; at least two light transmitting units respectively receiving and transmitting light signals measured at the different detected regions; an image sensing unit converting the light signals measured at the detected regions into image signals; a length measurement unit used to measure the distance between the detected regions; and an image analysis unit analyzing the image signals to obtain PPG signals for the detected regions. According to the PPG signals, the image analysis unit calculates the physiological parameters, including the perfusion index, respiration rate, pulse rate, stiffness index, reflection index, and PWV between the detected regions, which is derived according to the distance and the pulse transit time from the PPG signals of the two detected regions.Type: ApplicationFiled: November 30, 2011Publication date: February 21, 2013Inventors: Yue-Der LIN, Ching Che TSAI, Hu Ying HO, Shih Fan WANG, Kang Ping LIN, Hen Hong CHANG, Yung Ching CHANG
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Publication number: 20130046154Abstract: The present invention discloses a PPG imaging device and a PPG measuring method. The PPG imaging device comprises a light emitting unit, a collimator unit, a beam splitter unit, an image sensing unit, and an image analysis unit. The light emitting unit provides an incident light signal. The collimator unit receives the incident light signal and transforms the incident light signal into a parallel light signal. The beam splitter unit receives the parallel light signal and reflects it to a tested region. The image sensing unit receives a reflected light signal reflected from the tested region and converts it into image signals. The image analysis unit connects with the image sensing unit and analyzes the image signals to obtain PPG signals of the tested region. The PPG imaging device may be arranged in an anti-light pollution unit, whereby to prevent from optical interference and obtain higher measurement precision.Type: ApplicationFiled: November 29, 2011Publication date: February 21, 2013Inventors: Yue Der Lin, Shih Fan Wang, Hu Ying Ho, Ching Che Tsai, Kang Ping Lin, Hen Hong Chang, Yung Ching Chang
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Publication number: 20120088074Abstract: A workpiece with three-dimensional pattern having a three-dimensional surface and suitable for an electronic device is provided. A multiple three-dimensional micro patterns formed on the three-dimensional surface reflects an environment light to form images with a visual effect. The workpiece with three-dimensional pattern includes a workpiece and an adhesive layer. The adhesive layer is disposed on the workpiece and impressed to form the multiple three-dimensional micro patterns, and the workpiece is punched to form the three-dimensional surface. A first part of the multiple three-dimensional micro patterns on the three-dimensional surface reflects the environment light to form a first reflecting light beam. A second part of the multiple three-dimensional micro patterns on the three-dimensional surface reflects the environment light to form a second reflecting light beam.Type: ApplicationFiled: December 19, 2011Publication date: April 12, 2012Applicant: COMPAL ELECTRONICS, INC.Inventors: Wan-Li Chuang, Chien-Min Chang, Li-Jung Yu, Yung-Ching Chang, Ying-Ching Chen, Tsung-Sheng Chuang
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Patent number: 7812668Abstract: A multi-input operational amplifier comprises two transconductors, two current mirrors, and a current source. Each transconductor generates a current according to a corresponding voltage difference. When the voltage difference is less than or equal to zero, the current is a constant. When the voltage difference exceeds zero, the current is proportional to the voltage difference.Type: GrantFiled: September 23, 2008Date of Patent: October 12, 2010Assignee: Advanced Analog Technology, Inc.Inventor: Yung Ching Chang
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Publication number: 20090261904Abstract: A multi-input operational amplifier comprises two transconductors, two current mirrors, and a current source. Each transconductor generates a current according to a corresponding voltage difference. When the voltage difference is less than or equal to zero, the current is a constant. When the voltage difference exceeds zero, the current is proportional to the voltage difference.Type: ApplicationFiled: September 23, 2008Publication date: October 22, 2009Applicant: ADVANCED ANALOG TECHNOLOGY, INC.Inventor: YUNG CHING CHANG
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Publication number: 20080225034Abstract: The image sticking erasing circuit includes a detection circuit and a switching circuit connected to the detection circuit. The detection circuit is for use in detecting a first voltage signal, which closely follows the variation of the voltage source, and a reference voltage, which loosely follows the variation of the voltage source. When the detection circuit determines that the first voltage signal is lower than a first threshold value, the switching circuit switches the gate of a driving transistor to a second voltage signal, which loosely follows the voltage source. When the detection circuit determines that the reference voltage signal is lower than a second threshold value, the switching circuit switches the gate of a driving transistor to a low voltage state.Type: ApplicationFiled: March 29, 2007Publication date: September 18, 2008Applicant: ADVANCED ANALOG TECHNOLOGY, INC.Inventors: Wen Chia Pi, Yung Ching Chang, Yen Kuo Lo, Ko Ching Su
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Patent number: 7391916Abstract: A quantization matrix adjusting method for quality improvement by scaling down the default quantization matrix. The adjusting method comprises the steps of: updating a used bits BB_X and an average quantizer scale Avg_Q; allocating a bit budget BB_C for a current picture; calculating an estimated quantizer scale EstQ_C according to the used bits BB_X, the average quantizer scale Avg_Q and the bit budget BB_C deciding the operation mode, when the estimated quantizer scale EstQ_C is smaller than a threshold Th_Q, assigning the operation mode as an adjusting mode, otherwise remaining at normal mode; scaling down a default quantization matrix as a new quantization matrix when the operation mode is the adjusting mode; and coding the current picture using the new quantization matrix and default quantization matrix in the adjusting mode and normal mode, respectively.Type: GrantFiled: May 21, 2003Date of Patent: June 24, 2008Assignee: Silicon Integrated Systems Corp.Inventor: Yung-Ching Chang
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Patent number: 7388995Abstract: A quantization matrix adjusting method for avoiding underflow of VBV by enlarging the default quantization matrix. The adjusting method comprises the steps of: updating a used bits BB_X and an average quantizer scale Avg_Q; allocating the bit budget BB_C for the current picture; calculating an estimated quantizer scale EstQ_C according to the used bits BB_X, the average quantizer scale Avg_Q and the bit budget BB_C; deciding the operation mode, when the estimated quantizer scale EstQ_C is larger than a threshold Th_Q, assigning the operation mode as an alert mode, otherwise remaining at normal mode; enlarging the default quantization matrix as a new quantization matrix when the operation mode is the alert mode; and coding the current picture using the new quantization matrix and default quantization matrix in the alert mode and normal mode, respectively.Type: GrantFiled: May 21, 2003Date of Patent: June 17, 2008Assignee: Silicon Integrated Systems Corp.Inventor: Yung-Ching Chang
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Patent number: 7373004Abstract: An apparatus for constant quality rate control in moving picture compression. First, a total activity measure for the current picture to be encoded in a set of consecutive pictures is calculated. Based on the total activity measure of the current picture and an activity-to-complexity ratio of a previously encoded picture of the same type in the set of consecutive pictures, a complexity measure of the current picture is estimated. Thus, an instantaneous complexity measure is updated using the complexity measure and then an instantaneous rate is calculated. A target bit budget is allocated to the current picture depending on the instantaneous rate, the complexity measure and the instantaneous complexity measure. After encoding, the activity-to-complexity ratio for the just encoded picture is computed based on the total activity measure, actual bits consumed by the picture and the average of actual quantization step sizes used to encode the picture.Type: GrantFiled: May 23, 2003Date of Patent: May 13, 2008Assignee: Silicon Integrated Systems Corp.Inventors: Yung-Ching Chang, Chia-Chieh Chen, Teng-Kai Wang
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Patent number: 7352162Abstract: A PWM (pulse width modulation) boost system includes a boost circuit, a voltage dividing circuit, a comparator, a PWM circuit, a pre-oscillator, and a current limit circuit. A start-up method of the PWM boost system includes (1) providing an error voltage; (2) generating a PWM signal according to the error voltage; (3) controlling a switch in a boost circuit with the PWM signal, so as to control an inductor current flowing through a boost inductor in the boost circuit; (4) charging a capacitor in the boost circuit with the inductor current, wherein charges stored in the capacitor define a DC output voltage; and (5) providing a feedback voltage according to the DC output voltage to adjust the error voltage.Type: GrantFiled: January 9, 2007Date of Patent: April 1, 2008Assignee: Advanced Analog Technology, Inc.Inventors: Yung Ching Chang, Yen Kuo Lo, Wen Chia Pi
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Publication number: 20080067985Abstract: A PWM (pulse width modulation) boost system includes a boost circuit, a voltage dividing circuit, a comparator, a PWM circuit, a pre-oscillator, and a current limit circuit. A start-up method of the PWM boost system includes (1) providing an error voltage; (2) generating a PWM signal according to the error voltage; (3) controlling a switch in a boost circuit with the PWM signal, so as to control an inductor current flowing through a boost inductor in the boost circuit; (4) charging a capacitor in the boost circuit with the inductor current, wherein charges stored in the capacitor define a DC output voltage; and (5) providing a feedback voltage according to the DC output voltage to adjust the error voltage.Type: ApplicationFiled: January 9, 2007Publication date: March 20, 2008Applicant: ADVANCED ANALOG TECHNOLOGY, Inc.Inventors: Yung Ching Chang, Yen Kuo Lo, Wen Chia Pi
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Patent number: 7289564Abstract: A video encoding method with support for editing when scene changed. The video encoding method reads and stores the pictures by the display order and detects whether the scene change occurred. The method encodes the pictures by the coding order when there are not scenes changed and encodes the pictures by a special coding process when there are scenes changed. Because the video encoding method encodes the pictures with considering the states of scenes changed and generates a new GOP when a scene change occurred, the video sequence can be cut into two parts by an image editing process without re-encoding. Therefore, the video can be edited without any loss and the editing performance of the editing process can be better.Type: GrantFiled: September 10, 2003Date of Patent: October 30, 2007Assignee: Silicon Integrated Systems Corp.Inventor: Yung-Ching Chang
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Patent number: 7254176Abstract: An apparatus for variable bit rate control in moving picture compression. First, a total activity measure for the current picture to be encoded in a set of consecutive pictures is calculated. Based on the total activity measure of the current picture and an activity-to-complexity ratio of a previously encoded picture of the same type in the set of consecutive pictures, a complexity measure of the current picture is estimated. A statistical complexity measure is then calculated from the complexity measure of the current picture. A target bit budget is allocated to the current picture depending on the instantaneous rate, the complexity measure and the instantaneous complexity measure. After encoding the current picture, the activity-to-complexity ratio for the current picture is computed based on the total activity measure, actual bits consumed by the current picture and an average of actual quantization step sizes used to encode the current picture.Type: GrantFiled: May 23, 2003Date of Patent: August 7, 2007Assignee: Silicon Integrated Systems Corp.Inventors: Yung-Ching Chang, Jo-Tan Yao, Kuo-Ping Hsu
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Patent number: 7194031Abstract: A rate control method with region of interesting support, which coding macroblocks in a current picture with different priority. The rate control method calculates a weighted macroblock activity according to the priority and a macroblock activity and a picture activity for the current picture according to the weighted macroblock activity. Then, the method allocates a bit budget for each macroblock according to the priority and calculates an estimated complexity for the current picture according to a complexity of a previously coded picture, an activity of the previously coded picture and the weighted macroblock activity. The method also calculates an estimated quantizer scale according to the estimated complexity and the bit budget, an initial virtual buffer occupancy according to an reaction factor and the estimated quantizer scale and a macroblock quantizer scale according to a virtual buffer occupancy of a previously coded macroblock, the priority and the reaction factor.Type: GrantFiled: July 9, 2003Date of Patent: March 20, 2007Assignee: Silicon Integrated Systems Corp.Inventor: Yung-Ching Chang
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Patent number: 7133448Abstract: A total activity measure for a current picture to be encoded in a set of consecutive pictures of a video sequence is calculated first. Based on the total activity measure of the current picture and an activity-to-complexity ratio of a previously encoded picture of the same type in the set of consecutive pictures, a complexity measure of the current picture is estimated. With the estimated complexity measure of the current picture, an instantaneous complexity measure for the set of consecutive pictures is updated. A target bit budget is allocated to the current picture depending on the estimated complexity measure and the instantaneous complexity measure. The current picture is encoded according to the target bit budget, and the activity-to-complexity ratio for the current picture is computed based on the total activity, actual bits consumed by the current picture, and the average quantization step size of the current picture.Type: GrantFiled: November 7, 2002Date of Patent: November 7, 2006Assignee: Silicon Integrated Systems Corp.Inventors: Yung-Ching Chang, Jo-Tan Yao, Kuo-Ping Hsu