Patents by Inventor Chao-Kai Cheng
Chao-Kai Cheng 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: 20150077954Abstract: A rotary paddle level switch has a housing, a driving unit, two switches, a resilient member, a clutch, a transmission shaft, and a propeller. A resilient clip of the clutch holds a non-circular actuation section of the transmission shaft. When the driving unit drives the clutch to rotate, the transmission shaft and the propeller are driven by the clutch. When the propeller is rapidly rotated by suddenly exerting an excessively large external force thereon, as the resilient clip holds the transmission shaft by elastic force, the fast rotating transmission shaft removes itself from the holding of the resilient clip and is rotated without driving the resilient clip to rotate, thereby avoiding the transmission of the external force and damage to the driving unit. As the clutch just needs a clutch stand and a resilient clip to achieve the foregoing function, the level switch is structurally simple and relatively inexpensive.Type: ApplicationFiled: September 19, 2013Publication date: March 19, 2015Applicant: Finetek Co., Ltd.Inventors: Chih-Wen Wang, Ching-Jui Chen, Cheng-Tao Lee, Ting-Kuo Wu, Chao-Kai Cheng
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Patent number: 8950255Abstract: A sensing device can detect material depth, liquid-level, and temperature. The sensing device has a probe, a control module, a volume sensing module, a thermal sensing module, an output module, and a power module. The probe has two material electrodes connected to the volume sensing module and a thermal electrode connected to the thermal sensing module. A rated voltage is applied at the material electrodes based on radio frequency admittance. A current deviation of the material electrodes is obtained by the volume sensing module, and calculated via the control module by material characteristics to obtain a correct storage amount of material. A temperature at each material depth is correctly detected by the thermal electrode. Steel cable is used as the material of the material electrodes of the probe to detect material depth or liquid level with high impact resistant ability.Type: GrantFiled: May 3, 2012Date of Patent: February 10, 2015Assignee: Finetek Co., Ltd.Inventors: Liang-Chi Chang, Cheng-Lun Chang, Ching-Jui Chen, Chao-Kai Cheng
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Publication number: 20150033844Abstract: A measuring method for a frequency modulation continuous wave radar level meter is performed after presetting a previous-cycle weight and a current-cycle weight and acquiring a measured result in a previous cycle, and has steps of constantly transmitting a frequency modulation (FM) signal and receiving multiple reflected signals, obtaining a frequency difference between the FM signal and each reflected signal, selecting a characteristic frequency from a frequency spectrum, and calculating a measured result in the current cycle taken as the measured result in the previous cycle for calculating a measured result in a next cycle with a sum of a product of the measured result in the previous cycle and the previous-cycle weight and a product of a distance corresponding to the characteristic frequency so as to reduce variations of the measured result in each cycle and facilitate statistical analysis.Type: ApplicationFiled: July 30, 2013Publication date: February 5, 2015Applicant: FINETEK CO., LTD.Inventors: Jia-Hung CHEN, Shu-Chien CHENG, Chao-Kai CHENG, Yi-Wei LIU
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Publication number: 20150035695Abstract: An FMCW radar level meter has an RF signal processing module, an intermediate frequency (IF) signal processing module, and a computation and display module. A signal generator of the RF signal processing module generates a first RF signal, which is radiated by an antenna to a measured object. The antenna received a second RF signal reflected by the measured object. The IF signal processing module processes the second RF signal and compares the first RF signal with the second RF signal. The computation and display module calculates and displays a distance between the FMCW radar level meter and the measured object. Using the RF signal processing module and the IF signal processing module to process the second RF signal, the issues of noise and temperature coefficient shift can be resolved.Type: ApplicationFiled: August 5, 2013Publication date: February 5, 2015Applicant: Finetek Co., Ltd.Inventors: I-Chu Lin, Shu-Chien Cheng, Yi-Yan Lee, Hui-Chih Hsu, Chao-Kai Cheng
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Publication number: 20150029065Abstract: The present invention relates to a horn antenna device. The horn antenna device has a step-shaped signal feed-in apparatus and a conical horn antenna. The step-shaped signal feed-in apparatus has a stepped body having multiple stairs and a connecting pin. The stepped body is adapted to radiate electromagnetic waves and receive a reflection of the electromagnetic waves. According to the structure of the step-shaped signal feed-in apparatus of the invention, the resonating modes are easy to be determined. The directivity and the signal-to-noise rate are improved. In addition, the connecting pin is directly connected to the stairs for improving the signal stability of the horn antenna device.Type: ApplicationFiled: July 28, 2013Publication date: January 29, 2015Applicant: FINETEK CO., LTD.Inventors: Shu-Chien Cheng, I-Chu Lin, Yi-Yan Lee, Tzu-Chuan Tsai, Chao-Kai Cheng
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Publication number: 20140352425Abstract: A level transducer has a power supply module, a tuning fork module, a sensing-phase corrector and a controller. The tuning fork module has a tuning fork, at least one piezoelectric driving element, and at least one piezoelectric sensing element. The at least one piezoelectric driving element and the at least one piezoelectric sensing element are stacked on each other, and are mounted on the tuning fork. The power supply module is electrically connected and outputs a voltage to the at least one piezoelectric driving element to deform the at least one piezoelectric driving element. The at least one piezoelectric sensing element is extruded and outputs a voltage signal. The sensing-phase corrector obtains the voltage signal and outputs a clock signal to feedback control the voltage on the at least one piezoelectric driving element to optimize a deformation frequency of each piezoelectric element.Type: ApplicationFiled: November 21, 2013Publication date: December 4, 2014Applicant: FINETEK CO., LTD.Inventors: Jen-Shun WANG, Chi-Fan LIAO, Jun-Da CHEN, Shih-Ying WANG, Chao-Kai CHENG
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Publication number: 20140263978Abstract: The invention relates to a self-calibration method for a photoelectric liquid level switch and apparatus using the same. The apparatus has a control module, a light emitting module and a light sensing module. The light emitting module emits a light beam into a container. The light sensing module then detects a reflected light beam. The control module acquires two values respectively standing for a first liquid level status and a second liquid level status. When a default threshold value is beyond a range between the two values, the control module calculates a new threshold value in the range between the two values. The control module then replaces the default threshold value with the new threshold value. The threshold value is adjustable for any kind of liquid.Type: ApplicationFiled: March 13, 2013Publication date: September 18, 2014Applicant: FINETEK CO., LTD.Inventors: BO-YI WU, CHI-FAN LIAO, CHIU-HSING LIU, CHAO-KAI CHENG
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Publication number: 20140264098Abstract: A self-alignment filling level detecting device has a reflector and a sensor detachable from each other. The sensor has a light emitter, a light sensor, and a controller. The light sensor receives different light intensities when the reflector is assembled to the sensor and when the reflector is not assembled to the sensor. Thus, the controller determines whether the reflector has been accurately engaged and aligned with the sensor or not based on sensing results of the light sensor. Since the reflector and the sensor are detachable from each other, either the reflector or the sensor can be replaced individually if any one of them malfunctions.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: FINETEK CO., LTD.Inventors: BO-YI WU, CHI-FAN LIAO, CIU-HSING LIU, CHAO-KAI CHENG
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Patent number: 8720365Abstract: A method for fabricating a display is provided. The method includes providing a substrate having a pixel area, forming a plurality of patterned first electrodes on the pixel area, forming a plurality of partitions on both sides of the patterned first electrodes, respectively filling in spaces between the partitions with various colored material to cover the patterned first electrodes by a depositing process, and forming a cover on the partitions and the colored materials.Type: GrantFiled: September 24, 2008Date of Patent: May 13, 2014Assignee: Industrial Technology Research InstituteInventors: Chao-Kai Cheng, Wan-Wen Chiu, Yuh-Zheng Lee, Yuan-Chang Liao, Jyh-Wen Shiu, Jen-Chieh Yang
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Patent number: 8651729Abstract: A turbine vibrator has a housing, an eccentric rotor mounted in an air chamber of the housing and two covers mounted respectively in two mounting recesses of the housing. Two threaded walls defined respectively around the mounting recesses of the housing have same threaded directions. Therefore, the mounting recesses, the air chamber and the other mounting recess are formed sequentially so axes of the mounting recesses and the air chamber are disposed along a same line. Manufacturing processes of the housing is reduced and shearing forces applied to the shafts of the eccentric rotor are reduced so the turbine vibrator has a prolonged useful life. Moreover, as a rotating direction of the eccentric rotor and the fastening directions of the covers are the same, when the turbine vibrator operates, the covers tighten against the housing. The first and second covers do not drop from the housing.Type: GrantFiled: September 14, 2010Date of Patent: February 18, 2014Inventors: Tzu-Chuan Tsai, Chung-Wei Lu, Chao-Kai Cheng
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Publication number: 20130182742Abstract: A sensing device can detect material depth, liquid-level, and temperature. The sensing device has a probe, a control module, a volume sensing module, a thermal sensing module, an output module, and a power module. The probe has two material electrodes connected to the volume sensing module and a thermal electrode connected to the thermal sensing module. A rated voltage is applied at the material electrodes based on radio frequency admittance. A current deviation of the material electrodes is obtained by the volume sensing module, and calculated via the control module by material characteristics to obtain a correct storage amount of material. A temperature at each material depth is correctly detected by the thermal electrode. Steel cable is used as the material of the material electrodes of the probe to detect material depth or liquid level with high impact resistant ability.Type: ApplicationFiled: May 3, 2012Publication date: July 18, 2013Applicant: FINETEK CO., LTD.Inventors: Liang-Chi CHANG, Cheng-Lun CHANG, Ching-Jui CHEN, Chao-Kai CHENG
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Publication number: 20130106411Abstract: A magnetostrictive position transducer and a magnetostrictive sensing element thereof are characterized that a magnetostrictive sensing element is mounted inside an outer tube, the magnetostrictive sensing element has two end mounts respectively mounted on two ends of an insulating and hollow tube and a magnetostrictive wire mounted through the tube, the magnetostrictive wire has two wire adapters respectively mounted on two ends of the magnetostrictive wire and respectively mounted in the end mounts so that the magnetostrictive wire is contactlessly mounted through the tube, a sensing module is mounted in one of wire adapter to sense signal variation on the magnetostrictive wire. With the foregoing structure, the magnetostrictive sensing element does not require devices for applying pre-stress and damping, thereby simplifying structure and ensuring high stability in measurement of the magnetostrictive position transducer.Type: ApplicationFiled: October 26, 2011Publication date: May 2, 2013Applicant: FINETEK CO., LTDInventors: Wei-Wu Chen, Teng-Jin You, Chao-Kai Cheng
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Patent number: 8248656Abstract: A pattern printing system and data processing method thereof are disclosed, which are suitable for printing patterns on printed circuit boards or data format rearrangement printing used in displays. The pattern printing method includes a process for interpreting scription data into matrix data, a procedure for modulating the print head resolution and the printing resolution, a procedure for interpreting and transmitting data commands, a procedure for rearranging memory data, and a procedure for firing data synchronously so as to achieve high-resolution printing and to continuously modulate any print data.Type: GrantFiled: June 16, 2006Date of Patent: August 21, 2012Assignee: Industrial Technology Research InstituteInventors: Chih-Jian Lin, Chia-Ming Chang, Gian-Hung Liu, Chih-Hsuan Chiu, Yung-Kuo Ho, Hung-Pin Shih, Chieh-Yi Huang, Chao-Kai Cheng
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Publication number: 20120206538Abstract: A supply system capable of providing a working fluid is provided. The supply system includes an access device, a first energizer, a second energizer, a third energizer and an output device. The access device utilized to access the working fluid includes a connecting port. The first energizer provides a first energy to energize the working fluid, thereby expelling the bubbles from the working fluid. The second energizer provides a second energy to energize the working fluid received in the access device, thereby expelling the working fluid through the connecting port of the access device. The output device is connected to the access device, thereby receiving and outputting the working fluid. The third energizer provides a third energy to heat the working fluid passing through the access device and the output device.Type: ApplicationFiled: March 23, 2012Publication date: August 16, 2012Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Cheng-Yi WANG, Wan-Wen CHIU, Kuo-Hua WU, Chen-Chu TSAI, Chao-Kai CHENG
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Patent number: 8172387Abstract: A supply system capable of providing a working fluid is provided. The supply system includes an access device, a first energizer, a second energizer, a third energizer and an output device. The access device utilized to access the working fluid includes a connecting port. The first energizer provides a first energy to energize the working fluid, thereby expelling the bubbles from the working fluid. The second energizer provides a second energy to energize the working fluid received in the access device, thereby expelling the working fluid through the connecting port of the access device. The output device is connected to the access device, thereby receiving and outputting the working fluid. The third energizer provides a third energy to heat the working fluid passing through the access device and the output device.Type: GrantFiled: August 22, 2008Date of Patent: May 8, 2012Assignee: Industrial Technology Research InstituteInventors: Cheng-Yi Wang, Wan-Wen Chiu, Kuo-Hua Wu, Chen-Chu Tsai, Chao-Kai Cheng
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Patent number: 8139008Abstract: Bi-stable display systems and driving methods thereof are presented. The bi-stable display system includes a bi-stable display panel having at least one substrate, at least one electrode disposed on the substrate, and a bi-stable display medium between the at least one electrode, wherein the at least one electrode extends to pluralities of electrode pads on the at least one side of peripheral regions. A data input device for inputting display data to the bi-stable display panel includes a plurality of input terminals corresponding to the electrode pads of the bi-stable display panel. A trigger device detects relative movement between the bi-stable display panel and the data input device and generates a trigging signal to shift data address in a data shifter, thereby renewing image data in the bi-stable display panel.Type: GrantFiled: February 10, 2009Date of Patent: March 20, 2012Assignee: Industrial Technology Research InstituteInventors: Chieh-Yi Huang, Chao-Kai Cheng, Yuh-Zheng Lee, Jyh-Wen Shiu, Yuan-Chang Liao
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Publication number: 20120063260Abstract: A turbine vibrator has a housing, an eccentric rotor mounted in an air chamber of the housing and two covers mounted respectively in two mounting recesses of the housing. Two threaded walls defined respectively around the mounting recesses of the housing have same threaded directions. Therefore, the mounting recesses, the air chamber and the other mounting recess are formed sequentially so axes of the mounting recesses and the air chamber are disposed along a same line. Manufacturing processes of the housing is reduced and shearing forces applied to the shafts of the eccentric rotor are reduced so the turbine vibrator has a prolonged useful life. Moreover, as a rotating direction of the eccentric rotor and the fastening directions of the covers are the same, when the turbine vibrator operates, the covers tighten against the housing. The first and second covers do not drop from the housing.Type: ApplicationFiled: September 14, 2010Publication date: March 15, 2012Applicant: FINETEK CO., LTD.Inventors: Tzu-Chuan TSAI, Chung-Wei LU, Chao-Kai CHENG
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Patent number: 7926758Abstract: An apparatus for roll-to-roll processing includes a first roller for converting the transmission of a roll of flexible material from a first direction to a second direction substantially orthogonal to the first direction, a second roller spaced apart from the first roller and extending transversely with respect to the first roller for converting the transmission of the roll of flexible material from the second direction to a third direction substantially orthogonal to the first direction and the second direction, and a third roller spaced apart from the second roller and extending perpendicularly with respect to the first roller for converting the transmission of the roll of flexible material from the third direction to a fourth direction, wherein the roll of flexible material includes a first side and a second side, and wherein the first roller, the second roller and the third roller contact the same one of the first side and the second side of the roll of flexible material.Type: GrantFiled: July 31, 2006Date of Patent: April 19, 2011Assignee: Industrial Technology Research InstituteInventors: Wan-Wen Chiu, Chao-Kai Cheng, Jie-Kai Chang, Cheng-Yi Wang
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Patent number: 7891752Abstract: An Inkjet apparatus is provided. An Inkjet apparatus includes a piezoelectric inkjet print head, a plurality of driving unit, a detection unit and a control unit. The piezoelectric inkjet print head comprises a plurality of nozzles, wherein each the nozzle outputs an ink drop according to a driving voltage. The driving unit generates the driving voltage according to a control signal. The detection unit detects a state of the ink drop corresponding to the nozzle to generate a detection signal. The control unit generates the control signal to control the driving voltage according to the detection signal.Type: GrantFiled: March 26, 2008Date of Patent: February 22, 2011Assignee: Industrial Technology Research InstituteInventors: Tsu-Min Liu, Jeng-Han Lee, Chieh-Yi Huang, Chia-Ming Chang, Chao-Kai Cheng, Yuh-Zheng Lee
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Patent number: 7883181Abstract: Atmospheric plasma inkjet printing apparatus and methods for fabricating color filters using the same. The atmosphere plasma inkjet printing apparatus includes a nozzle plate having a first column of nozzles and a second column of nozzles. An inkjet printhead module corresponds to the first column of nozzles. An atmospheric plasma module is corresponds to the second column of nozzles.Type: GrantFiled: October 12, 2007Date of Patent: February 8, 2011Assignee: Industrial Technology Research InstituteInventors: Chun-Hung Lin, Chia-Chiang Chang, Chao-Kai Cheng, Chieh-Yi Huang, Wan-Wen Chiu