Patents by Inventor Li-Jen Chang
Li-Jen 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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Patent number: 11647592Abstract: A system for effectively curing dry film ink throughout its thickness on circuit boards being made applies an exposure system, a circuit board, and a method for making the circuit board. The exposure system includes a plurality of mixed light sources with different wavelengths within a range of 365 nm to 440 nm, the mixed light sources can output at least three different wavelengths of light each of substantially a single wavelength and a fourth source of light able to output light of a spectrum of wavelengths, the ranges of light being between 365 nm and 440 nm.Type: GrantFiled: April 23, 2021Date of Patent: May 9, 2023Assignees: QING DING PRECISION ELECTRONICS (HUAIAN) CO., LTD, Avary Holding (Shenzhen) Co., Limited.Inventors: Ching-Lung Chuang, I-Hsin Chen, Li-Jen Chang
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Publication number: 20220312599Abstract: A system for effectively curing dry film ink throughout its thickness on circuit boards being made applies an exposure system, a circuit board, and a method for making the circuit board. The exposure system includes a plurality of mixed light sources with different wavelengths within a range of 365 nm to 440 nm, the mixed light sources can output at least three different wavelengths of light each of substantially a single wavelength and a fourth source of light able to output light of a spectrum of wavelengths, the ranges of light being between 365 nm and 440 nm.Type: ApplicationFiled: April 23, 2021Publication date: September 29, 2022Inventors: CHING-LUNG CHUANG, I-HSIN CHEN, LI-JEN CHANG
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Patent number: 11409490Abstract: A multi-screen control system is provided. The multi-screen control system includes a plurality of display devices, at least one console device, a video switching device, and a centralized display device. The display device respectively shows output images provided by a plurality of video sources. The console device receives a control operation to the at least one of the output images. The video switching device is connected to the display device and the at least one console device. The video switching device transmits the output images provided by the video sources to the display device, and obtains at least one partial image from the at least one of the output images according to the control operation. The centralized display device is connected to the video switching device. The video switching device outputs the at least one partial image to the centralized display device.Type: GrantFiled: March 16, 2020Date of Patent: August 9, 2022Assignee: Aten International Co., Ltd.Inventor: Li-Jen Chang
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Publication number: 20210064321Abstract: A multi-screen control system is provided. The multi-screen control system includes a plurality of display devices, at least one console device, a video switching device, and a centralized display device. The display device respectively shows output images provided by a plurality of video sources. The console device receives a control operation to the at least one of the output images. The video switching device is connected to the display device and the at least one console device. The video switching device transmits the output images provided by the video sources to the display device, and obtains at least one partial image from the at least one of the output images according to the control operation. The centralized display device is connected to the video switching device. The video switching device outputs the at least one partial image to the centralized display device.Type: ApplicationFiled: March 16, 2020Publication date: March 4, 2021Applicant: Aten International Co., Ltd.Inventor: Li-Jen Chang
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Patent number: 10558419Abstract: The present invention discloses a video adapter for installing video wall quickly. The video adapter includes a microcontroller unit; a number generating unit coupled to the microcontroller unit to set a number for one display in the video wall and transmit the number to the microcontroller unit; a first connector coupled to the display; and a second connector coupled to one end of a video and audio cable; wherein the microcontroller unit processes the number and transmits the number to a video and audio control device coupled to the other end of the video and audio cable; wherein the video and audio control device assigns corresponding video signals according to the number, so as to transmit the corresponding video signals to the display in the video wall.Type: GrantFiled: July 18, 2017Date of Patent: February 11, 2020Assignee: ATEN International Co., Ltd.Inventor: Li-Jen Chang
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Patent number: 10476513Abstract: A successive approximation register (SAR) analog-to-digital converter (ADC) with high linearity for generating an n-bit converted output includes a first capacitor digital-to-analog (DAC) and a second capacitor DAC. One of the first capacitor DAC and the second capacitor DAC that has greater output signal is defined as a higher-voltage capacitor DAC, and the other as an un-switching capacitor DAC. In an m-th conversion phase, an (m?1)-th capacitor of the un-switching capacitor DAC is switched according to a comparison between output signals of the higher-voltage capacitor DAC and the un-switching capacitor DAC.Type: GrantFiled: November 19, 2018Date of Patent: November 12, 2019Assignees: NCKU Research and Development Foundation, Himax Technologies LimitedInventors: Soon-Jyh Chang, Li-Jen Chang
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Patent number: 10360170Abstract: The present invention provides an apparatus for expanding a serial communication port. The apparatus includes a first serial port, a second serial port and a processing and control module. The first serial port is used to transmit a first signal, and the second serial port is used to transmit a second signal. The processing and control module is coupled between the first serial port and the second serial port. The processing and control module includes a first serial bus host controller, a second serial bus host controller, a data forwarding unit and an expansion unit. The apparatus is connected between an electronic device and multiple peripheral devices, so that via the expansion unit, each peripheral device generates its own communication port on the electronic device.Type: GrantFiled: August 3, 2017Date of Patent: July 23, 2019Assignee: ATEN International Co., Ltd.Inventors: Kuo-Feng Kao, Li-Jen Chang, Hsiang-Jui Yu
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Patent number: 10001828Abstract: A signal adapter device for a display system which enables turning on and off the display device for energy conservation. The signal adapter has a signal input port coupled to a signal source, a signal output port coupled to a display, and an adapter port coupled to a sensor. Corresponding pins of the input and output ports are electrically connected to each other, except that the hot plug detect pin of the input port is electrically disconnected from that of the output port but is electrically connected to a hot plug detect pin of the adapter port. The sensor senses environmental conditions such as the presence of viewers within a certain distance, and generates a voltage signal for the hot plug detect pin. Based on this signal on its hot plug detect pin, the signal source determines whether to transmit multimedia data to the display device.Type: GrantFiled: March 16, 2016Date of Patent: June 19, 2018Assignee: ATEN INTERNATIONAL CO., LTD.Inventor: Li-Jen Chang
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Publication number: 20180039595Abstract: The present invention provides an apparatus for expanding a serial communication port. The apparatus includes a first serial port, a second serial port and a processing and control module. The first serial port is used to transmit a first signal, and the second serial port is used to transmit a second signal. The processing and control module is coupled between the first serial port and the second serial port. The processing and control module includes a first serial bus host controller, a second serial bus host controller, a data forwarding unit and an expansion unit. The apparatus is connected between an electronic device and multiple peripheral devices, so that via the expansion unit, each peripheral device generates its own communication port on the electronic device.Type: ApplicationFiled: August 3, 2017Publication date: February 8, 2018Applicant: ATEN International Co., Ltd.Inventors: KUO-FENG KAO, LI-JEN CHANG, HSIANG-JUI YU
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Publication number: 20180024801Abstract: The present invention discloses a video adapter for installing video wall quickly. The video adapter includes a microcontroller unit; a number generating unit coupled to the microcontroller unit to set a number for one display in the video wall and transmit the number to the microcontroller unit; a first connector coupled to the display; and a second connector coupled to one end of a video and audio cable; wherein the microcontroller unit processes the number and transmits the number to a video and audio control device coupled to the other end of the video and audio cable; wherein the video and audio control device assigns corresponding video signals according to the number, so as to transmit the corresponding video signals to the display in the video wall.Type: ApplicationFiled: July 18, 2017Publication date: January 25, 2018Applicant: ATEN International Co., Ltd.Inventor: Li-Jen CHANG
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Publication number: 20170003726Abstract: A signal adapter device for a display system which enables turning on and off the display device for energy conservation. The signal adapter has a signal input port coupled to a signal source, a signal output port coupled to a display, and an adapter port coupled to a sensor. Corresponding pins of the input and output ports are electrically connected to each other, except that the hot plug detect pin of the input port is electrically disconnected from that of the output port but is electrically connected to a hot plug detect pin of the adapter port. The sensor senses environmental conditions such as the presence of viewers within a certain distance, and generates a voltage signal for the hot plug detect pin. Based on this signal on its hot plug detect pin, the signal source determines whether to transmit multimedia data to the display device.Type: ApplicationFiled: March 16, 2016Publication date: January 5, 2017Applicant: ATEN International Co., Ltd.Inventor: Li-Jen Chang
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Patent number: 8113485Abstract: A leak-proof structure of an oil pipe connector includes: a connector cylinder, being a hollow housing, and having an oil inlet at a front end, and an oil outlet at a rear end, and a switch base interconnected to a shaft hole in the connector cylinder; a control device, installed in the connector cylinder; a switch device, having a transmission shaft, inserted into the shaft hole and linked with the control device, and a switch handle coupled to the top of the transmission shaft; a leak-proof device, having a bearing slot below the shaft hole, and a first leak-proof slot, a circular latch slot and a second leak-proof slot above the leak-proof device, and a bearing being disposed below the bearing slot, and a first O-ring, and a latch ring, a second O-ring for achieving a leak-proof effect.Type: GrantFiled: January 26, 2009Date of Patent: February 14, 2012Assignee: Bison, Inc.Inventors: Ching-Ching Chang, Ying-Ying Chang, Li-Jen Chang
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Patent number: 8082942Abstract: The present invention discloses an oil pipe connector including a connector cylinder (abbr. cylinder), and having an oil inlet at front and an oil outlet at rear end of the cylinder; a switch base with a pivot hole interconnected with the interior of the cylinder; a control device, including a connector cap which being a hollow conical shape, the front end having positioning shaft hole interconnected with the interior; a control mechanism including a connecting portion, a positioning shaft and a piston disc coupled together; the positioning shaft being disposed in a positioning shaft hole of the connector cap; a switch device, including a push rod which being a curved lever, a transmission shaft and a switch handle; an end of the push rod linking the control mechanism; the transmission shaft being pivotally coupled to the pivot hole of the switch base of the cylinder; the switch handle being coupled to the connecting shaft lever.Type: GrantFiled: January 15, 2009Date of Patent: December 27, 2011Assignee: Bison Inc.Inventors: Ching-Ching Chang, Ying-Ying Chang, Li-Jen Chang
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Publication number: 20110192202Abstract: A tubular lock safety structure comprises a lock cylinder assembly and a lock core assembly having a lock core body, at least one set of flat key wafer and an equal number of elastic elements. The blocking ring of the lock cylinder assembly is sheathed on the lock core body, and a plurality of transverse guide slots is formed on an external wall of the lock core body for accommodating the flat key wafers and the elastic elements, and the flat key wafer can be fixed and reset in the guide slot by the elastic element, and each flat key wafer has at least one combination notch. If a key is inserted into the lock core to push the flat key wafer, each combination notch will be aligned with the lock block and set to a free state for unlocking.Type: ApplicationFiled: January 27, 2011Publication date: August 11, 2011Inventors: LI-JEN CHANG, LI-SHIH LIAO
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Publication number: 20100176586Abstract: The present invention discloses an oil pipe connector including a connector cylinder (abbr. cylinder), and having an oil inlet at front and an oil outlet at rear end of the cylinder; a switch base with a pivot hole interconnected with the interior of the cylinder; a control device, including a connector cap which being a hollow conical shape, the front end having positioning shaft hole interconnected with the interior; a control mechanism including a connecting portion, a positioning shaft and a piston disc coupled together; the positioning shaft being disposed in a positioning shaft hole of the connector cap; a switch device, including a push rod which being a curved lever, a transmission shaft and a switch handle; an end of the push rod linking the control mechanism; the transmission shaft being pivotally coupled to the pivot hole of the switch base of the cylinder; the switch handle being coupled to the connecting shaft lever.Type: ApplicationFiled: January 15, 2009Publication date: July 15, 2010Applicant: BISON INC.Inventors: Ching-Ching Chang, Ying-Ying Chang, Li-jen Chang
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Patent number: 7076646Abstract: A selective quick boot system and method. The selective quick boot system includes a control module and a processing module with an event table. The control module receives a quick signal, provides power enabling the processing module, an event code corresponding to the quick signal is then transferred to the processing module. The processing module compares the received event code to the event table to locate a corresponding item, and drives the device recorded as the corresponding item and executes the associated application also recorded in the event table.Type: GrantFiled: November 5, 2003Date of Patent: July 11, 2006Assignee: Mitac Technology Corp.Inventor: Li-Jen Chang
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Publication number: 20050097309Abstract: A selective quick boot system and method. The selective quick boot system includes a control module and a processing module with an event table. The control module receives a quick signal, provides power enabling the processing module, an event code corresponding to the quick signal is then transferred to the processing module. The processing module compares the received event code to the event table to locate a corresponding item, and drives the device recorded as the corresponding item and executes the associated application also recorded in the event table.Type: ApplicationFiled: November 5, 2003Publication date: May 5, 2005Inventor: Li-Jen Chang