Patents by Inventor Kun Wah Yip
Kun Wah Yip 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: 9357614Abstract: The invention provides an illumination apparatus and a method of generating light by the illumination apparatus. The illumination apparatus comprises a light generation unit, configured to generate light having a color temperature in the range of [a first color temperature, a second color temperature]; and a controller, configured to control the light generation unit to generate light having a color temperature changing from a third color temperature to a fourth color temperature over time, wherein the third and the fourth color temperatures are in the range of [the first color temperature, the second color temperature]. The illumination apparatus of the invention could generate light having a changing color temperature over time, for example a color temperature changing from a less preferred color temperature to a preferred color temperature.Type: GrantFiled: December 14, 2011Date of Patent: May 31, 2016Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Di Lou, Kun-Wah Yip
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Patent number: 9247616Abstract: This invention provides an illumination apparatus and an illumination method. The illumination apparatus comprises: a first light source for illuminating a first area; a second light source for illuminating a second area; a first measuring unit for measuring the illuminance of the first area; a second measuring unit for measuring the illuminance of the second area; and an adjusting unit for adjusting at least one of the first light source and the second light source to make the contrast ratio of the measured illuminance of the first area to the measured illuminance of the second area change gradually from a first predefined value to a second predefined value lower than the first predefined value during a first predefined duration. In this way, the relative higher contrast ratio (i.e. the first predefined value) enables the users to improve their work efficiency and the relative lower contrast ratio (i.e. the second predefined value) allows the users' eyes to be comfortable.Type: GrantFiled: June 20, 2011Date of Patent: January 26, 2016Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Kun-Wah Yip, Di Lou, Lucius Theodorus Vinkenvleugel
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Patent number: 8810133Abstract: The invention relates to illumination, especially to a grid for illumination apparatus. This invention provides a grid (100) for attenuating electromagnetic radiation from a light source. The grid comprises a plurality of baffles (110), each baffle being electro conductive, wherein the plurality of baffles are configured to form a plurality of cells (120), each cell being formed as a waveguide so as to attenuate the electromagnetic radiation from the light source. In this way, the electromagnetic radiation from the light source can be reduced or prevented so as to decrease the danger to users.Type: GrantFiled: June 29, 2010Date of Patent: August 19, 2014Assignee: Koninklijke Philips N.V.Inventors: Yong Liu, Kun-Wah Yip, Di Lou
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Publication number: 20130271033Abstract: The invention provides an illumination apparatus and a method of generating light by the illumination apparatus. The illumination apparatus comprises a light generation unit, configured to generate light having a color temperature in the range of [a first color temperature, a second color temperature]; and a controller, configured to control the light generation unit to generate light having a color temperature changing from a third color temperature to a fourth color temperature over time, wherein the third and the fourth color temperatures are in the range of [the first color temperature, the second color temperature]. The illumination apparatus of the invention could generate light having a changing color temperature over time, for example a color temperature changing from a less preferred color temperature to a preferred color temperature.Type: ApplicationFiled: December 14, 2011Publication date: October 17, 2013Applicant: KONINKLIJKE PHILIPS N.V.Inventors: Di Lou, Kun-Wah Yip
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Patent number: 8553810Abstract: The present invention relates to an apparatus, method and computer program product for enhanced data reception, wherein a tracking procedure is enhanced to support long payloads by introducing additional channel-gain tracking applied together with frequency-offset tracking to the payload data. Thereby, both residual frequency offset and residual channel gain are reduced.Type: GrantFiled: April 13, 2010Date of Patent: October 8, 2013Assignee: Koninklijke Philips N.V.Inventor: Kun-Wah Yip
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Publication number: 20130106309Abstract: This invention provides an illumination apparatus and an illumination method. The illumination apparatus comprises: a first light source for illuminating a first area; a second light source for illuminating a second area; a first measuring unit for measuring the illuminance of the first area; a second measuring unit for measuring the illuminance of the second area; and an adjusting unit for adjusting at least one of the first light source and the second light source to make the contrast ratio of the measured illuminance of the first area to the measured illuminance of the second area change gradually from a first predefined value to a second predefined value lower than the first predefined value during a first predefined duration. In this way, the relative higher contrast ratio (i.e. the first predefined value) enables the users to improve their work efficiency and the relative lower contrast ratio (i.e. the second predefined value) allows the users' eyes to be comfortable.Type: ApplicationFiled: June 20, 2011Publication date: May 2, 2013Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Kun-Wah Yip, Di Lou, Lucius Theodorus Vinkenvleugel
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Patent number: 8189652Abstract: The invention provides a method of detecting high-mobility state of mobile terminal, comprising steps of: estimating a channel impulse response (CIR) based on received signal samples; performing channel equalization based on said received signal samples and the estimated channel impulse response; computing at least one characteristic value for a particular region of a relevant time slot based on the equalized signal samples; and deciding if said at least one characteristic value satisfies a predetermined condition that mobile terminal is in high-mobility state. The invention also provides a corresponding apparatus comprising: a channel estimator; a channel equalizer; computing means for computing at least one characteristic value for a particular region of a relevant time slot based on the equalized signal samples; and deciding means for deciding if said at least one characteristic value satisfies a predetermined condition of mobile terminal being in high-mobility state.Type: GrantFiled: November 2, 2005Date of Patent: May 29, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Kun-Wah Yip, Yanzhong Dai
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Publication number: 20120098431Abstract: The invention relates to illumination, especially to a grid for illumination apparatus. This invention provides a grid (100) for attenuating electromagnetic radiation from a light source. The grid comprises a plurality of baffles (110), each baffle being electro conductive, wherein the plurality of baffles are configured to form a plurality of cells (120), each cell being formed as a waveguide so as to attenuate the electromagnetic radiation from the light source. In this way, the electromagnetic radiation from the light source can be reduced or prevented so as to decrease the danger to users.Type: ApplicationFiled: June 29, 2010Publication date: April 26, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Yong Liu, Kun-Wah Yip, Di Lou
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Publication number: 20120051417Abstract: The present invention relates to an apparatus, method and computer program product for enhanced data reception, wherein a tracking procedure is enhanced to support long payloads by introducing additional channel-gain tracking applied together with frequency-offset tracking to the payload data. Thereby, both residual frequency offset and residual channel gain are reduced.Type: ApplicationFiled: April 13, 2010Publication date: March 1, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventor: Kun-Wah Yip
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Publication number: 20090213920Abstract: The invention provides a method of detecting high-mobility state of mobile terminal, comprising steps of: estimating a channel impulse response (CIR) based on received signal samples; performing channel equalization based on said received signal samples and the estimated channel impulse response; computing at least one characteristic value for a particular region of a relevant time slot based on the equalized signal samples; and deciding if said at least one characteristic value satisfies a predetermined condition that mobile terminal is in high-mobility state. The invention also provides a corresponding apparatus comprising: a channel estimator; a channel equalizer; computing means for computing at least one characteristic value for a particular region of a relevant time slot based on the equalized signal samples; and deciding means for deciding if said at least one characteristic value satisfies a predetermined condition of mobile terminal being in high-mobility state.Type: ApplicationFiled: November 2, 2005Publication date: August 27, 2009Applicant: Koninklijke Philips Electronics, N.V.Inventors: Kun-Wah Yip, Dai Yanzhong
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Patent number: 7395291Abstract: A sliding correlator for timing synchronization in HIPERLAN/2 and IEEE 802.11a wireless local area networks by correlating the received signal with a known waveform is disclosed. The disclosed sliding correlator avoids the large number of complex multiplications per second, about 320 million by one estimate, by employing an implementation that avoids multiplication operations while also avoiding complexity. This invention discloses methods and apparatus to implement this correlator, using alternative correlator coefficients well suited for digital implementations, whereby the need to perform multiplication is eliminated.Type: GrantFiled: February 24, 2004Date of Patent: July 1, 2008Assignee: The University of Hong KongInventors: Kun Wah Yip, Yik Chung Wu, Tung Sang Ng
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Publication number: 20050187996Abstract: A sliding correlator for timing synchronization in HIPERLAN/2 and IEEE 802.11a wireless local area networks by correlating the received signal with a known waveform is disclosed. The disclosed sliding correlator avoids the large number of complex multiplications per second, about 320 million by one estimate, by employing an implementation that avoids multiplication operations while also avoiding complexity. This invention discloses methods and apparatus to implement this correlator, using alternative correlator coefficients well suited for digital implementations, whereby the need to perform multiplication is eliminated.Type: ApplicationFiled: February 24, 2004Publication date: August 25, 2005Inventors: Kun Wah Yip, Yik Chung Wu, Tung Sang Ng
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Patent number: 6868115Abstract: An all-lag correlator is provided that correlates a received spread-spectrum signal with a reference code and produces at each sampling instance N correlation lags corresponding to the correlation of the received signal with 0, 1, . . . , N?1 lags (or delays) of the reference code, wherein N is the length of the reference code. The correlator includes a spread spectrum signal storage means, subtraction means, multiplication means, correlation lag storage means and addition means configured such that a correlation lag for a present sampling instance is based on a correlation lag of a previous sampling instance.Type: GrantFiled: June 30, 2000Date of Patent: March 15, 2005Assignee: University of Hong KongInventors: Chin Long Cheng, Tung Sang Ng, Kun Wah Yip
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Patent number: 6847676Abstract: An all-lag rotating-reference correlator correlates a received spread-spectrum signal with a rotating reference code, and produces in each sampling instance N correlation lags corresponding to the correlation of the received signal with 0, 1, . . . , N?1 lags (or delays) of the rotating reference code, wherein N is the length of the rotating reference code. The rotating reference code is time-variant and is generated by a rotation of a basic reference code. The received signal, possibly embedded in noise and interference, consists of periodic replicas of the basic reference code with or without data modulation. The first embodiment of the present invention describes a method and apparatus of an all-lag rotating-reference correlator which is applicable to situations where data modulation is not present in the received signal.Type: GrantFiled: June 30, 2000Date of Patent: January 25, 2005Assignee: University of Hong KongInventors: Tung Sang Ng, Chin Long Cheng, Kun Wah Yip
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Publication number: 20010032318Abstract: A method an apparatus for protecting a configuration data sequence from reverse engineering is provided. The configuration data sequence includes a plurality of configuration bits and is used to configure the operation of a programmable device, such as an FPGA or other reconfigurable logic. According to a method of the present invention, the configuration bits of the configuration data sequence are partially encrypted by altering some, but not all, of the bits, and subsequently storing the partially-encrypted configuration data sequence external to the programmable device. Corresponding decryption information is then stored within the programmable device, which decrypts the partially-encrypted configuration data sequence using the decryption information stored therein to thereby configure internal logic of the programmable device.Type: ApplicationFiled: December 1, 2000Publication date: October 18, 2001Inventors: Kun Wah Yip, Tung Sang Ng