Patents by Inventor Jia-Ming Liu
Jia-Ming Liu 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: 11719880Abstract: A perovskite optical element includes a light guiding unit and a luminescent layer. The light guiding unit is configured to conduct light and serves as a resonant cavity. The luminescent layer is a thin film made of perovskite material and clads the light guiding unit. The luminescent layer is configured to be excited by an excitation module to emit light. The light is conducted and output by the light guiding unit. A manufacturing method of a perovskite optical element includes preparing a dip coating solution; dipping a single crystal optical fiber in the dip coating solution for one hour, removing the single crystal optical fiber out of the dip coating solution, and drying the single crystal optical fiber; and placing the single crystal optical fiber into a tube furnace, heating the crystal optical fiber, and introducing synthetic molecules into the tube furnace.Type: GrantFiled: December 10, 2021Date of Patent: August 8, 2023Assignee: NATIONAL DONG HWA UNIVERSITYInventors: Duc-Huy Nguyen, Jia-Yuan Sun, Chia-Yao Lo, Jia-Ming Liu, Wan-Shao Tsai, Ming-Hung Li, Sin-Jhang Yang, Cheng-Chia Lin, Shien-Der Tzeng, Yuan-Ron Ma, Ming-Yi Lin, Chien-Chih Lai
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Publication number: 20230118309Abstract: A perovskite optical element includes a light guiding unit and a luminescent layer. The light guiding unit is configured to conduct light and serves as a resonant cavity. The luminescent layer is a thin film made of perovskite material and clads the light guiding unit. The luminescent layer is configured to be excited by an excitation module to emit light. The light is conducted and output by the light guiding unit. A manufacturing method of a perovskite optical element includes preparing a dip coating solution; dipping a single crystal optical fiber in the dip coating solution for one hour, removing the single crystal optical fiber out of the dip coating solution, and drying the single crystal optical fiber; and placing the single crystal optical fiber into a tube furnace, heating the crystal optical fiber, and introducing synthetic molecules into the tube furnace.Type: ApplicationFiled: December 10, 2021Publication date: April 20, 2023Inventors: DUC-HUY NGUYEN, JIA-YUAN SUN, CHIA-YAO LO, JIA-MING LIU, WAN-SHAO TSAI, MING-HUNG LI, SIN-JHANG YANG, CHENG-CHIA LIN, SHIEN-DER TZENG, YUAN-RON MA, MING-YI LIN, CHIEN-CHIH LAI
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Patent number: 11011817Abstract: The present disclosure provides a waveguide-excited terahertz microstrip antenna. The antenna includes a dielectric substrate, a ground plate, a rectangular waveguide, a metal pin, and a radiation patch. The dielectric substrate has a first surface and a second surface opposite to the first surface. The ground plate is located on the first surface of the dielectric substrate and defines a coupling slit. The rectangular waveguide is located on a surface of the ground plate away from the dielectric substrate and extended substantially along a first direction parallel to the first surface. The metal pin is located inside the rectangular waveguide, and is in contact with the ground plate and substantially perpendicular to the ground plate. The radiation patch is located on the second surface of the dielectric substrate.Type: GrantFiled: December 5, 2019Date of Patent: May 18, 2021Assignee: TSINGHUA UNIVERSITYInventors: Xiao-Ping Zheng, Xia-Hui Han, Sheng-Chuang Bai, Hua Geng, De-Jian Zhang, Jia-Ming Liu
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Publication number: 20200185805Abstract: The present disclosure provides a waveguide-excited terahertz microstrip antenna. The antenna includes a dielectric substrate, a ground plate, a rectangular waveguide, a metal pin, and a radiation patch. The dielectric substrate has a first surface and a second surface opposite to the first surface. The ground plate is located on the first surface of the dielectric substrate and defines a coupling slit. The rectangular waveguide is located on a surface of the ground plate away from the dielectric substrate and extended substantially along a first direction parallel to the first surface. The metal pin is located inside the rectangular waveguide, and is in contact with the ground plate and substantially perpendicular to the ground plate. The radiation patch is located on the second surface of the dielectric substrate.Type: ApplicationFiled: December 5, 2019Publication date: June 11, 2020Applicant: Tsinghua UniversityInventors: XIAO-PING ZHENG, XIA-HUI HAN, SHENG-CHUANG BAI, HUA GENG, DE-JIAN ZHANG, JIA-MING LIU
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Patent number: 8861969Abstract: A laser source is configured for all-optical AM-FM up-conversion. In one exemplary embodiment, an amplitude modulated (AM) optical input signal containing a baseband signal at a sub-microwave frequency, is injected into the laser source. The amplitude of the AM optical input signal and the optical carrier frequency are adjusted so as to place the laser source in a period-one dynamical state characterized by a transitioning of the laser source from a free-running optical frequency to at least two optical frequencies having a separation distance equal to a period-one microwave frequency. As a result of the period-one dynamical state, a frequency modulated (FM) optical output signal containing the baseband signal carried at the period-one microwave frequency, is propagated out of the laser source. The period-one microwave frequency is operative as a sub-carrier signal.Type: GrantFiled: August 13, 2007Date of Patent: October 14, 2014Assignee: The Regents of the University of CaliforniaInventors: Sze-Chun Chan, Sheng-Kwang Hwang, Jia-Ming Liu
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Patent number: 8455093Abstract: A reactive silicon dioxide compound, wherein the formula of the reactive silicon dioxide compound is shown as Formula (I): where each R is a reactive group shown as Formula (II) or Formula (III), independently: and where R1, R2 and R3 include H or CH3, independently, n1 is an integer of about 1-6 and n2 is an integer of about 0-4. An optical protective film containing the reactive silicon dioxide compound is also provided.Type: GrantFiled: May 11, 2010Date of Patent: June 4, 2013Assignee: Industrial Technology Research InstituteInventors: Te-Yi Chang, Ming-Tzung Wu, Chiunn-Wen Chen, Jia-Ming Liu, Kuo-Tung Huang
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Patent number: 8421035Abstract: Systems and methods that enhance the resolution of a microscope in all three spatial dimensions. A microscope system is provided that typically includes a first objective lens (20), an illumination source that provides excitation illumination (?ex) at a first wavelength through the objective lens (20) in a first direction onto a fluorescent sample so as to induce fluorescent emission in the sample at a second wavelength (?fl) different than the first wavelength. The system also typically includes an element (60) that provides illumination at the second wavelength (?fl) to the sample in a second direction different from the first direction, and a detector (10) for detecting the fluorescent emission. The optical gain of the fluorescent emission at the second wavelength is enhanced through stimulated emission.Type: GrantFiled: August 7, 2007Date of Patent: April 16, 2013Assignee: The Regents of the University of CaliforniaInventors: Jia-Ming Liu, Enrico Stefani
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Publication number: 20110088592Abstract: A reactive silicon dioxide compound, wherein the formula of the reactive silicon dioxide compound is shown as Formula (I): where each R is a reactive group shown as Formula (II) or Formula (III), independently: and where R1, R2 and R3 include H or CH3, independently, n1 is an integer of about 1-6 and n2 is an integer of about 0-4. An optical protective film containing the reactive silicon dioxide compound is also provided.Type: ApplicationFiled: May 11, 2010Publication date: April 21, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Te-Yi Chang, Ming-Tzung Wu, Chiunn-Wen Chen, Jia-Ming Liu, Kuo-Tung Huang
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Patent number: 7923975Abstract: An analog variable-frequency controller includes a first current generator, a second current generator, a clock generator and a light/heavy load selector. The first and second current generator receive a load current signal and then output a first voltage signal and a second voltage signal, respectively. The clock generator generates a corresponding switching frequency according to the first voltage signal or the second voltage signal. The light/heavy load selector, connected with the first current generator, the second current generator and the clock generator, receives a control signal for controlling the clock generator to receive the first voltage signal or the second voltage signal. The abovementioned controller is implemented by an analog circuit, which has a lower circuit complexity, lower cost and is easy to be integrated into a switching converter.Type: GrantFiled: September 3, 2009Date of Patent: April 12, 2011Assignees: Megawin Technology Co., Ltd., NCKU Research and Development FoundationInventors: Jia-Ming Liu, Yeong-Chau Kuo, Tai-Haur Kuo
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Publication number: 20110044692Abstract: A laser source is configured for all-optical AM-FM up-conversion. In one exemplary embodiment, an amplitude modulated (AM) optical input signal containing a baseband signal at a sub-microwave frequency, is injected into the laser source. The amplitude of the AM optical input signal and the optical carrier frequency are adjusted so as to place the laser source in a period-one dynamical state characterized by a transitioning of the laser source from a free-running optical frequency to at least two optical frequencies having a separation distance equal to a period-one microwave frequency. As a result of the period-one dynamical state, a frequency modulated (FM) optical output signal containing the baseband signal carried at the period-one microwave frequency, is propagated out of the laser source. The period-one microwave frequency is operative as a sub-carrier signal.Type: ApplicationFiled: August 13, 2007Publication date: February 24, 2011Inventors: Sze-Chun Chan, Sheng-Kwang Hwang, Jia-Ming Liu
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Publication number: 20100276608Abstract: Systems and methods that enhance the resolution of a microscope in all three spatial dimensions. A microscope system is provided that typically includes a first objective lens (20), an illumination source that provides excitation illumination (?ex) at a first wavelength through the objective lens (20) in a first direction onto a fluorescent sample so as to induce fluorescent emission in the sample at a second wavelength (?fI) different than the first wavelength. The system also typically includes an element (60) that provides illumination at the second wavelength (?fl) to the sample in a second direction different from the first direction, and a detector (10) for detecting the fluorescent emission. The optical gain of the fluorescent emission at the second wavelength is enhanced through stimulated emission.Type: ApplicationFiled: August 7, 2007Publication date: November 4, 2010Applicant: The Regents of the University of CaliforniaInventors: Jia-Ming Liu, Enrico Stefani
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Publication number: 20100134079Abstract: An analog variable-frequency controller includes a first current generator, a second current generator, a clock generator and a light/heavy load selector. The first and second current generator receive a load current signal and then output a first voltage signal and a second voltage signal, respectively. The clock generator generates a corresponding switching frequency according to the first voltage signal or the second voltage signal. The light/heavy load selector, connected with the first current generator, the second current generator and the clock generator, receives a control signal for controlling the clock generator to receive the first voltage signal or the second voltage signal. The abovementioned controller is implemented by an analog circuit, which has a lower circuit complexity, lower cost and is easy to be integrated into a switching converter.Type: ApplicationFiled: September 3, 2009Publication date: June 3, 2010Inventors: Jia-Ming LIU, Yeong-Chau Kuo, Tai-Haur Kuo
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Patent number: 6387545Abstract: A tertiary amine imparted quaterphenyl compound represented by the following formula: where R1 and R2, which can be different or the same, are hydrogen, C1-C5 alkyl, or C6-C12 aryl, and R3 is hydrogen, C1-C5 alkyl, a vinyl group, or an aryl vinyl group. The tertiary amine-imparted quaterphenyl compound exhibits good blue light luminescence and hole-transportability, and can be used in forming a hole-transporting layer, a blue light emitting layer, or a combined hole-transporting and light emitting layer of a light emitting organic electroluminescent device. Examples of the quaterphenyl compounds include N-quaterphenyl-4-yl-N,N-diphenylamine, N-(4′-(1,1-diphenylvinyl)quaterphenyl-4-yl)-N-phenyl-N-(m-tolyl)amine, or N-quaterphenyl-4-yl-N-phenyl-N-(m-tolyl)amine.Type: GrantFiled: April 14, 1999Date of Patent: May 14, 2002Assignee: Industrial Technology Research InstituteInventors: Jia-Ming Liu, Huan-Lurn Hsieh, Po-Yen Lu, Ying-Chuan Wang
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Patent number: 6284420Abstract: A peroxide-modified titanyl phthalocyanine for use in preparing charge generating layer of a photoreceptor is disclosed. The peroxide-modified titanyl phthalocyanine is obtained by subjecting titanyl phthalocyanine to a peroxide-induced complexation-mediated crystal transformation at a low temperature. The peroxide-modified titanyl phthalocyanine is characterized by having Bragg diffraction angles of 7.3, 9.4, 14.0, 24.1, 25.7, 27.2 and 28.5 degrees, and vibrational absorption resonances at 1486 cm (superscript: −1), 1420 cm (superscript: −1), 1134 cm (superscript: −1), 1078 cm (superscript: −1), 966 cm (superscript: −1), 900 cm (superscript: −1), 762 cm (superscript: −1) and 736 cm (superscript: −1). The photoreceptor exhibits excellent photosensitivity at wavelengths in the near-infrared range and has a unique crystal form, especially the peroxide-modified titanyl phthalocyanine shows a higher distinct absorption peak at the wavelength of 780 nm.Type: GrantFiled: January 26, 2000Date of Patent: September 4, 2001Assignee: Industrial Technology Research InstituteInventors: Jia-Ming Liu, Kuo-Tung Huang, Chiang-Yun Lee, Mei-Tyz Peng, Cheng-Chi Wang, Rong-Ming Ke
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Patent number: 5453343Abstract: Organic photoreceptors of the functionally separated laminated type containing a hydrazone compound in the charge transport layer thereof which provides low crystallinity and improved sensitivity, durability, and reproducibility. The hydrazone compound disclosed in the present invention is presented by the following general formula (I): ##STR1## wherein R.sub.1 represents a substituted or unsubstituted C.sub.1 -C.sub.4 alkyl group, R.sub.2 represents a hydrogen atom, or an alkyl or alkoxy group; n is an integer of either 1 or 2; R.sub.3 and R.sub.4 each independently represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted aralkyl group; or alternatively R.sub.3 and R.sub.4 form a substituted or unsubstituted aromatic heterocyclic ring residue cojointly with the nitrogen atom to which they are bonded.Type: GrantFiled: February 9, 1993Date of Patent: September 26, 1995Assignee: Industrial Technology Research InstituteInventors: Jia-Ming Liu, Shih-Ying Shen, Kuei-Fei Teng
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Patent number: 5270139Abstract: A new organophotoconductor comprising a conductive substrate, a charge generation layer and a charge transport layer wherein the charge generation layer comprises a bisazo compound and a squarylium compound as the charge generation material. The organophotoconductor exhibits high sensitivity, low residual potential and improved durability and reproducibility.Type: GrantFiled: July 2, 1992Date of Patent: December 14, 1993Assignee: Industrial Technology Research InstituteInventors: Feng-Wen Yeng, Jia-Ming Liu
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Patent number: 5046184Abstract: A passively mode-locked laser suitable for use with homogeneously broadened lasing medium or a lasing medium having a high-power output, long relaxation time or a narrow bandwidth. The laser includes a main cavity in which the lasing medium is disposed and an external cavity including a non-linear element. The non-linear element is selected to induce a non-linear phase shift in a coherent beam from the main cavity. In operation, a portion of a laser beam in the main cavity is coupled to the external cavity and a phase-shifted output from the external cavity is reflected back into the main cavity to provide a narrow pulse, mode-locked output from the laser. In one embodiment the non-linear element of the external cavity is an optical fiber with a mirror disposed adjacent one end of the optical fiber to provide dual propagation of a laser pulse through the fiber. In high-power applications the external cavity mirror is disposed proximate but spaced apart from the optical fiber end.Type: GrantFiled: April 5, 1990Date of Patent: September 3, 1991Assignee: University of CaliforniaInventors: Joseph K. Chee, Eric C. T. Cheung, Mo-Nga Kong, Jia-Ming Liu
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Patent number: 4878723Abstract: An optically controlled semiconductor waveguide interferometer apparatus includes a Mach-Zehnder interferometer formed of semiconductor laser materials. A first optoelectronic switching means is adapted to be coupled across a first voltage potential and one of the optical paths of the interferometer. The first optoelectronic switching means has a first gap therein. Likewise, a second optoelectronic switching means is adapted to be coupled across a second voltage potential and the other of the optical paths. The second optoelectronic switching means has a respective gap therein. Light pulses are applied to the two gaps for controlling the index of refraction of the optical paths, whereby the light pulses control the interferometer so that the output intensity of the interferometer is modulated.Type: GrantFiled: February 6, 1986Date of Patent: November 7, 1989Assignee: GTE Laboratories IncorporatedInventors: Ying C. Chen, Jia-ming Liu, Michael A. Newkirk
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Patent number: 4689793Abstract: A complete set of optical logic gates and circuits based upon direct polarization switching, and various types of optical flip-flops based upon polarization bistability, in semiconductor lasers are described. By operating the laser in the direct polarization switchable mode, logic gates and circuits such as inverter, AND, NAND, OR and NOR can be provided with two optoelectronic switches or photodetectors. With the laser being operated in the polarization bistable mode, clocked optical flip-flops are operable with a few optoelectronic switches or photodetectors.Type: GrantFiled: July 3, 1985Date of Patent: August 25, 1987Assignee: GTE Laboratories IncorporatedInventors: Jia-ming Liu, Ying C. Chen
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Patent number: 4685108Abstract: An optical square wave multivibrator includes a semiconductor laser that operates near the polarization transition temperature in a pure TM mode at low injection currents and switches operation to a pure TE mode at high injection currents, and vice versa. Near such temperature, the semiconductor laser experiences large hysteresis loops with high contrast ratio in its polarization-resolved power vs current characteristic while total power exhibits only slight change in hysteresis. The switching behavior of the TE mode is complementary to that of the TM mode. The laser is biased within the hysteresis loops. A current pulse applied in one direction to the laser causes it to provide a TE mode laser output, whereas a current pulse applied in the other direction causes the laser to provide a TM mode laser output.Type: GrantFiled: July 3, 1985Date of Patent: August 4, 1987Assignee: GTE Laboratories IncorporatedInventors: Robert J. Seymour, Jia-ming Liu, Ying C. Chen