Patents by Inventor Eng Hock Lim
Eng Hock Lim 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: 9466879Abstract: The subject disclosure relates to solar energy collection and use in communications systems and to enhancements thereof. In an aspect, dual function antennas are disclosed that can simultaneously function as an antenna and as a solar energy collection system. In further aspects, disclosed embodiments can focus incident solar radiation to increase output voltage of conventional solar cells. Measured and simulated results demonstrate various aspects of the subject disclosure.Type: GrantFiled: February 26, 2014Date of Patent: October 11, 2016Assignee: CITY UNIVERSITY OF HONG KONGInventors: Kwok Wa Leung, Eng Hock Lim
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Patent number: 9123995Abstract: An aesthetic dielectric antenna (e.g., a dielectric resonator antenna) includes an aesthetically shaped decoration having at least one shaped dielectric (swan, apple or building shape) with a dielectric constant of more than one. A waveguide, feedline, probe or other means of excitation is electronically coupled to the dielectric to emit a radiation pattern for carrying analog or digital information.Type: GrantFiled: September 13, 2012Date of Patent: September 1, 2015Assignee: CITY UNIVERSITY OF HONG KONGInventors: Kwok Wa Leung, Xiaosheng Fang, Eng Hock Lim
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Patent number: 8988297Abstract: Provided is a circuit for an electronic device having a non-planar transparent resonator. The transparent resonator is mounted on said circuit so as to at least partially occupy a footprint of another component of the circuit. The transparent resonator forms part of a light pathway on said circuit for transmitting light to or from said another component. Also provided is a transparent dielectric resonator antenna (DRA) for optical applications. Since the DRA is transparent, it can let light pass through itself and, thus, the light can be utilized by an optical part of a system or device. The transparent DRA can be placed on top of a solar cell. Since the DRA does not block the light, the light can reach the solar cell panel and power can be generated for the system or device. The system or device so obtained is very compact because no extra footprint is needed within the system or device for the DRA. It finds application in compact wireless applications that need a self-sustaining power device.Type: GrantFiled: May 14, 2013Date of Patent: March 24, 2015Assignee: City University of Hong KongInventors: Kwok Wa Leung, Eng Hock Lim
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Publication number: 20140176375Abstract: The subject disclosure relates to solar energy collection and use in communications systems and to enhancements thereof. In an aspect, dual function antennas are disclosed that can simultaneously function as an antenna and as a solar energy collection system. In further aspects, disclosed embodiments can focus incident solar radiation to increase output voltage of conventional solar cells. Measured and simulated results demonstrate various aspects of the subject disclosure.Type: ApplicationFiled: February 26, 2014Publication date: June 26, 2014Applicant: City University of Hong KongInventors: Kwok Wa Leung, Eng Hock Lim
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Patent number: 8698681Abstract: The subject disclosure relates to solar energy collection and use in communications systems and to enhancements thereof. In an aspect, dual function antennas are disclosed that can simultaneously function as an antenna and as a solar energy collection system. In further aspects, disclosed embodiments can focus incident solar radiation to increase output voltage of conventional solar cells. Measured and simulated results demonstrate various aspects of the subject disclosure.Type: GrantFiled: April 21, 2010Date of Patent: April 15, 2014Assignee: City University of Hong KongInventors: Kwok Wa Leung, Eng Hock Lim
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Patent number: 8599081Abstract: The subject disclosure relates to solar energy collection and use in communications systems and to enhancements thereof. In an aspect, dual function antennas are disclosed that can simultaneously function as an antenna and as a solar energy collection system. In further aspects, disclosed embodiments can focus incident solar radiation to increase output voltage of conventional solar cells. Measured and simulated results demonstrate various aspects of the subject disclosure.Type: GrantFiled: April 21, 2010Date of Patent: December 3, 2013Assignee: City University of Hong KongInventors: Kwok Wa Leung, Eng Hock Lim
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Patent number: 8547287Abstract: Provided is a circuit for an electronic device having a non-planar transparent resonator. The transparent resonator is mounted on said circuit so as to at least partially occupy a footprint of another component of the circuit. The transparent resonator forms part of a light pathway on said circuit for transmitting light to or from said another component. Also provided is a transparent dielectric resonator antenna (DRA) for optical applications. Since the DRA is transparent, it can let light pass through itself and, thus, the light can be utilized by an optical part of a system or device. The transparent DRA can be placed on top of a solar cell. Since the DRA does not block the light, the light can reach the solar cell panel and power can be generated for the system or device. The system or device so obtained is very compact because no extra footprint is needed within the system or device for the DRA. It finds application in compact wireless applications that need a self-sustaining power device.Type: GrantFiled: November 24, 2009Date of Patent: October 1, 2013Assignee: City University of Hong KongInventors: Kwok Wa Leung, Eng Hock Lim
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Publication number: 20130249757Abstract: Provided is a circuit for an electronic device having a non-planar transparent resonator. The transparent resonator is mounted on said circuit so as to at least partially occupy a footprint of another component of the circuit. The transparent resonator forms part of a light pathway on said circuit for transmitting light to or from said another component. Also provided is a transparent dielectric resonator antenna (DRA) for optical applications. Since the DRA is transparent, it can let light pass through itself and, thus, the light can be utilized by an optical part of a system or device. The transparent DRA can be placed on top of a solar cell. Since the DRA does not block the light, the light can reach the solar cell panel and power can be generated for the system or device. The system or device so obtained is very compact because no extra footprint is needed within the system or device for the DRA. It finds application in compact wireless applications that need a self-sustaining power device.Type: ApplicationFiled: May 14, 2013Publication date: September 26, 2013Applicant: City University of Hong KongInventors: Kwok Wa Leung, Eng Hock Lim
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Publication number: 20130234898Abstract: An aesthetic dielectric antenna (e.g., a dielectric resonator antenna) includes an aesthetically shaped decoration having at least one dielectric with a dielectric constant of more than one. A waveguide, feedline, probe or other means of excitation is electronically coupled to the dielectric to emit a radiation pattern for carrying analog or digital information.Type: ApplicationFiled: September 13, 2012Publication date: September 12, 2013Applicant: CITY UNIVERSITY OF HONG KONGInventors: Kwok Wa LEUNG, Xiaosheng FANG, Eng Hock LIM
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Publication number: 20110260936Abstract: The subject disclosure relates to solar energy collection and use in communications systems and to enhancements thereof. In an aspect, dual function antennas are disclosed that can simultaneously function as an antenna and as a solar energy collection system. In further aspects, disclosed embodiments can focus incident solar radiation to increase output voltage of conventional solar cells. Measured and simulated results demonstrate various aspects of the subject disclosure.Type: ApplicationFiled: April 21, 2010Publication date: October 27, 2011Applicant: CITY UNIVERSITY OF HONG KONGInventors: Kwok Wa Leung, Eng Hock Lim
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Publication number: 20110260937Abstract: The subject disclosure relates to solar energy collection and use in communications systems and to enhancements thereof. In an aspect, dual function antennas are disclosed that can simultaneously function as an antenna and as a solar energy collection system. In further aspects, disclosed embodiments can focus incident solar radiation to increase output voltage of conventional solar cells. Measured and simulated results demonstrate various aspects of the subject disclosure.Type: ApplicationFiled: April 21, 2010Publication date: October 27, 2011Applicant: CITY UNIVERSITY OF HONG KONGInventors: Kwok Wa Leung, Eng Hock Lim
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Publication number: 20110122036Abstract: Provided is a circuit for an electronic device having a non-planar transparent resonator. The transparent resonator is mounted on said circuit so as to at least partially occupy a footprint of another component of the circuit. The transparent resonator forms part of a light pathway on said circuit for transmitting light to or from said another component. Also provided is a transparent dielectric resonator antenna (DRA) for optical applications. Since the DRA is transparent, it can let light pass through itself and, thus, the light can be utilized by an optical part of a system or device. The transparent DRA can be placed on top of a solar cell. Since the DRA does not block the light, the light can reach the solar cell panel and power can be generated for the system or device. The system or device so obtained is very compact because no extra footprint is needed within the system or device for the DRA. It finds application in compact wireless applications that need a self-sustaining power device.Type: ApplicationFiled: November 24, 2009Publication date: May 26, 2011Applicant: CITY UNIVERSITY OF HONG KONGInventors: Kwok Wa Leung, Eng Hock Lim
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Patent number: 6931425Abstract: A method and random number generator are provided for generating random numbers. Under the method, a filter coefficient value that is used by a filter to filter an input signal is set and then compared to a default value for the filter coefficient. At least one bit of the random number is then set based on the comparison between the filter coefficient value and the default value.Type: GrantFiled: June 20, 2002Date of Patent: August 16, 2005Assignee: Seagate Technology LLCInventors: WenXiang Xie, Wei Loon Ng, Eng Hock Lim
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Patent number: 6822815Abstract: A magnetoresistive element measurement circuit configured for measuring resistance of a magnetoresistive element biased by a current source is disclosed. In a preferred embodiment, the measurement circuit includes the magnetoresistive element, a current source providing a fixed current to the magnetoresistive element, at least one current bypass switch controllingly engaging a measurement resistor in an electrical parallel configuration with the biased magnetoresistive element, and an analogue voltage detector measuring voltage first across the biased magnetoresistive element and then across the biased magnetoresistive element in electrical parallel communication with the measurement resistor. The measured voltages are factored with the measurement resistor to determine the resistance of the magnetoresistive element.Type: GrantFiled: June 28, 2002Date of Patent: November 23, 2004Assignee: Seagate Technology LLCInventors: Eng Hock Lim, Khai Sheng Ng, Fong Kheon Chong, Chew Weng Khin Victor, Myint Ngwe
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Patent number: 6798596Abstract: A guardband portion is written on a disc surface in a disc drive. A predetermined data pattern is written on at least one data track adjacent to the guardband portion. A predetermined guardband pattern is written at a plurality of different guardband frequencies in the guardband portion. For each guardband frequency, at least one performance criterion is measured for the data track. A desired guardband pattern is written on the guardband portion of the disc surface at a guardband frequency chosen based on the measured performance criterion.Type: GrantFiled: November 27, 2001Date of Patent: September 28, 2004Assignee: Seagate Technology LLCInventors: Eng Hock Lim, Quek Leong Choo, Kok Leong Loh, Myint Ngwe, Kah Liang Gan
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Patent number: 6765736Abstract: A disc drive with on-the-fly verification of an enabled condition of the write element, comprising a rotatable disc having a magnetic recording surface, and a data reading and writing assembly. The data reading and writing assembly comprises a read/write head comprising a write element and a read element, both adjacent the recording surface; a preamplifier comprising a write driver applying a series of write currents for writing data to the recording surface and a read amplifier for reading stored data from the recording surface; and an interconnect joining the write driver to the write element so as to generate time-varying magnetic fields selectively magnetizing the recording surface in response to the write currents, and joining the read amplifier to the read element so as to transduce magnetization vectors on the recording surface associated with stored data.Type: GrantFiled: January 24, 2002Date of Patent: July 20, 2004Assignee: Seagate Technology LLCInventors: Beng Theam Ko, Eng Hock Lim, Victor WengKhin Chew, Myint Ngwe, Kah Liang Gan
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Patent number: 6724550Abstract: A method for the adaptive dampening of a peak amplitude of a thermal asperity signal in a disc drive to minimize loss of read data integrity, including the steps of determining a peak-to-peak preamble signal amplitude for identifying an amplitude signal range of the peak amplitude of the thermal asperity signal; measuring the peak amplitude of the thermal asperity signal; separating the peak-to-peak preamble signal amplitude into substantially even portions for use in calculating a value of the amplitude signal range of the peak amplitude of the thermal asperity signal; calculating the value of the amplitude signal range of the peak amplitude of the thermal asperity signal for use in determining a dampening resistance used by a dampening circuit to adaptively dampen the peak amplitude of the thermal asperity signal; and activating the dampening circuit to dampen the peak amplitude of the thermal asperity signal.Type: GrantFiled: September 19, 2001Date of Patent: April 20, 2004Assignee: Seagate Technology LLCInventors: Eng Hock Lim, Beng Theam Ko, Hweepeng Teo, Fong Kheon Chong, Myint Ngwe, Kah Liang Gan
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Patent number: 6646448Abstract: A writer coil in a data head of a data storage system is tested by coupling detection circuitry to the writer coil and driving the writer coil with a periodic pulse signal generated by the detection circuitry. As a result, voltage is generated, with the detection circuitry, as a function of an inductance of the writer coil. An inductance of the writer coil is calculated as a function of the generated voltage. Electrical short circuits and discontinuities in the writer coil are identified as a function of the calculated inductance.Type: GrantFiled: September 21, 2001Date of Patent: November 11, 2003Assignee: Seagate Technology LLCInventors: Beng Theam Ko, Eng Hock Lim, Myint Ngwe, Kah Liang Gan, Beng Wee Quak
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Publication number: 20030172096Abstract: A method and random number generator are provided for generating random numbers. Under the method, a filter coefficient value that is used by a filter to filter an input signal is set and then compared to a default value for the filter coefficient. At least one bit of the random number is then set based on the comparison between the filter coefficient value and the default value.Type: ApplicationFiled: June 20, 2002Publication date: September 11, 2003Inventors: WenXiang Xie, Wei Loon Ng, Eng Hock Lim
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Publication number: 20030169528Abstract: A magnetoresistive element measurement circuit configured for measuring resistance of a magnetoresistive element biased by a current source is disclosed. In a preferred embodiment, the measurement circuit includes the magnetoresistive element, a current source providing a fixed current to the magnetoresistive element, at least one current bypass switch controllingly engaging a measurement resistor in an electrical parallel configuration with the biased magnetoresistive element, and an analogue voltage detector measuring voltage first across the biased magnetoresistive element and then across the biased magnetoresistive element in electrical parallel communication with the measurement resistor. The measured voltages are factored with the measurement resistor to determine the resistance of the magnetoresistive element.Type: ApplicationFiled: June 28, 2002Publication date: September 11, 2003Applicant: Seagate Technology LLCInventors: Eng Hock Lim, Khai Sheng Ng, Fong Kheon Chong, Chew Weng Khin Victor, Myint Ngwe