Patents by Inventor Yat Kheng Leong
Yat Kheng Leong 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: 9007305Abstract: An optical navigation system and method of estimating motion uses a plate with an aperture, a photodetector and an optical system for optical lift detection. The optical system is configured to direct an input light to a target surface through the aperture of the plate and to direct the input light reflected from the target surface and transmitted back through the aperture of the plate toward the photodetector to be detected by the photodetector for lift detection.Type: GrantFiled: January 4, 2011Date of Patent: April 14, 2015Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Yat Kheng Leong, Sai Mun Lee, Thineshwaran G. Krishnan
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Patent number: 8279178Abstract: A system and method for performing optical navigation uses an imaging lens, which is positioned between a target surface and an image sensor array, that is orientated to be substantially horizontal with respect to the target surface such that the optical axis of the imaging lens is substantially perpendicular to the target surface.Type: GrantFiled: November 30, 2007Date of Patent: October 2, 2012Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Thineshwaran Gopal Krishnan, Yat Kheng Leong, Sai Mun Lee
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Patent number: 8237684Abstract: A user input device to generate an optical navigation signal based on an edge-lit pattern. The user input device includes an optical element, a light source, a sensor array, and a navigation engine. The optical element includes a finger interface surface. At least a portion of the optical element exhibits total internal reflection (TIR). The light source provides light to the finger interface surface. The sensor array detects light reflected from the finger interface surface in response to contact between a finger and the finger interface surface. The contact between the finger and the finger interface surface disrupts the TIR and causes light to be reflected out of the optical element towards the sensor array. The navigation engine generates lateral movement information, which is indicative of lateral movement of the finger relative to the sensor array, in response to the detected light.Type: GrantFiled: September 26, 2008Date of Patent: August 7, 2012Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Yat Kheng Leong, Sai Mun Lee, Hung Kwang Lee, Jin Kiong Ang
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Patent number: 8212776Abstract: A system of a tactile switch and an optical navigation device. The system includes a user device. The user device includes an optical finger navigation device. The optical finger navigation device enables a user to control a function of the user device via the optical finger navigation device. The optical finger navigation device includes a circuit board, a sensor array electrically coupled to the circuit board, and a tactile switch electrically coupled to the circuit board. The sensor array detects light and generates a navigation signal that corresponds to the detected light. The tactile switch is physically aligned with the sensor array on the circuit board. The tactile switch generates a switch signal upon actuation of the tactile switch in response to a force on a packaging structure of the sensor array.Type: GrantFiled: September 23, 2008Date of Patent: July 3, 2012Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Hung Kwang Lee, Sai Mun Lee, Yat Kheng Leong
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Patent number: 8093545Abstract: An optical navigation device which uses optical interference to generate navigation images. The optical navigation device includes an optical element, a light source, a sensor array, a navigation engine, and a light shield. The optical element includes a finger interface surface. The light source includes a laser in optical communication with the finger interface surface to provide light to the finger interface surface. The sensor array detects light reflected from the finger interface surface in response to contact between a finger and the finger interface surface. The navigation engine is coupled to the sensor array. The navigation engine generates lateral movement information based on lateral movement of the finger relative to the sensor array. The light shield is between the optical element and the sensor array. The light shield includes an aperture linearly aligned with the sensor array.Type: GrantFiled: September 26, 2008Date of Patent: January 10, 2012Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Yat Kheng Leong, Sai Mun Lee, Hung Kwang Lee, Jin Kiong Ang
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Patent number: 8081162Abstract: An optical navigation device for operation in a surface navigation mode and a free space navigation mode is described. One embodiment of the optical navigation device includes a microcontroller, a surface navigation sensor, and a free space navigation sensor. The surface and free space navigation sensors are coupled to the microcontroller. The microcontroller is configured to process a movement of the optical navigation device. The surface navigation sensor is configured to generate a surface navigation signal in response to a surface navigation image. The free space navigation sensor is configured to generate a free space navigation signal in response to a free space navigation image. Embodiments of the optical navigation device facilitate an integrated optical solution to provide desktop navigation and scene navigation in a single optical navigation device.Type: GrantFiled: May 16, 2007Date of Patent: December 20, 2011Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Edward Kah Ching Teoh, Yat Kheng Leong, Jin Kiong Ang, Wui Pin Lee, Ban Kuan Koay
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Patent number: 8022931Abstract: A self-calibrating optical feedback system for an optical navigation device. The self-calibrating optical feedback system includes a light source, an illumination lens, a beam splitter, and an optical feedback device. The illumination lens is coupled relative to the light source. The light source emits light based on a programming current. The illumination lens directs the light towards a beam splitter. The beam splitter partially reflects the light directed from the illumination lens. The optical feedback device detects the partially reflected light from the beam splitter and generates a feedback signal to modify an intensity of the light emitted by the light source. Embodiments of the self-calibrating optical feedback system maintain the output intensity of a laser driven optical navigation device below an eye-safety level.Type: GrantFiled: November 29, 2007Date of Patent: September 20, 2011Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Kee Seng Soo, Yat Kheng Leong, Sai Mun Lee
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Patent number: 7978477Abstract: A dual-channel optical navigation system with vertically aligned sensors. The dual-channel optical navigation system includes a circuit board, a contact navigation sensor, and a free-space navigation sensor. The circuit board mechanically supports and electrically connects multiple navigation sensors on opposing sides of the circuit board. The contact navigation sensor is coupled to a first side of the circuit board. The contact navigation sensor generates a contact navigation signal based on contact navigation images of a contact navigation surface approximately adjacent to the dual-channel optical navigation system. The free-space navigation sensor is coupled to a second side of the circuit board. The free-space navigation sensor generates a free-space navigation signal based on free-space navigation images of an operating environment of the dual-channel optical navigation system.Type: GrantFiled: May 9, 2008Date of Patent: July 12, 2011Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Hun Kwang Lee, Yat Kheng Leong, Sai Mun Lee
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Publication number: 20110095984Abstract: An optical navigation system and method of estimating motion uses a plate with an aperture, a photodetector and an optical system for optical lift detection. The optical system is configured to direct an input light to a target surface through the aperture of the plate and to direct the input light reflected from the target surface and transmitted back through the aperture of the plate toward the photodetector to be detected by the photodetector for lift detection.Type: ApplicationFiled: January 4, 2011Publication date: April 28, 2011Applicant: AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD.Inventors: Yat Kheng Leong, Sai Mun Lee, Thineshwaran G. Krishnan
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Patent number: 7868281Abstract: An optical navigation system and method of estimating motion uses a plate with an aperture, a photodetector and an optical system for optical lift detection. The optical system is configured to direct an input light to a target surface through the aperture of the plate and to direct the input light reflected from the target surface and transmitted back through the aperture of the plate toward the photodetector to be detected by the photodetector for lift detection.Type: GrantFiled: November 20, 2006Date of Patent: January 11, 2011Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Yat Kheng Leong, Sai Mun Lee, Thineshwaran G. Krishnan
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Patent number: 7710570Abstract: A light pipe for an optical navigation system. The light pipe includes a collection surface, a collimation surface, and a reflective surface. The collection surface is to accept incident light into the light pipe from a light source. The collimation surface is to collimate the light and to direct the collimated light to a navigation plane for detection by a navigation sensor. The reflective surface is between the collection surface and the collimation surface and is to reflect the light along a reflective path as the light travels within the light pipe from the collection surface to the collimation surface. The reflective surface has a curved geometry oriented substantially along the path of travel of the light through the light pipe. The curved geometry of the reflective path facilitates convergence of the light with respect to a first axis.Type: GrantFiled: April 18, 2008Date of Patent: May 4, 2010Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Yat Kheng Leong, Sai Mun Lee, Kok Khian Ng
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Publication number: 20100078545Abstract: An optical navigation device which uses optical interference to generate navigation images. The optical navigation device includes an optical element, a light source, a sensor array, a navigation engine, and a light shield. The optical element includes a finger interface surface. The light source includes a laser in optical communication with the finger interface surface to provide light to the finger interface surface. The sensor array detects light reflected from the finger interface surface in response to contact between a finger and the finger interface surface. The navigation engine is coupled to the sensor array. The navigation engine generates lateral movement information based on lateral movement of the finger relative to the sensor array. The light shield is between the optical element and the sensor array. The light shield includes an aperture linearly aligned with the sensor array.Type: ApplicationFiled: September 26, 2008Publication date: April 1, 2010Applicant: AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD.Inventors: Yat Kheng Leong, Sai Mun Lee, Hung Kwang Lee, Jin Kiong Ang
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Publication number: 20100079408Abstract: A user input device to generate an optical navigation signal based on an edge-lit pattern. The user input device includes an optical element, a light source, a sensor array, and a navigation engine. The optical element includes a finger interface surface. At least a portion of the optical element exhibits total internal reflection (TIR). The light source provides light to the finger interface surface. The sensor array detects light reflected from the finger interface surface in response to contact between a finger and the finger interface surface. The contact between the finger and the finger interface surface disrupts the TIR and causes light to be reflected out of the optical element towards the sensor array. The navigation engine generates lateral movement information, which is indicative of lateral movement of the finger relative to the sensor array, in response to the detected light.Type: ApplicationFiled: September 26, 2008Publication date: April 1, 2010Applicant: AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD.Inventors: Yat Kheng Leong, Sai Mun Lee, Hung Kwang Lee, Jin Kiong Ang
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Publication number: 20100071967Abstract: A system of a tactile switch and an optical navigation device. The system includes a user device. The user device includes an optical finger navigation device. The optical finger navigation device enables a user to control a function of the user device via the optical finger navigation device. The optical finger navigation device includes a circuit board, a sensor array electrically coupled to the circuit board, and a tactile switch electrically coupled to the circuit board. The sensor array detects light and generates a navigation signal that corresponds to the detected light. The tactile switch is physically aligned with the sensor array on the circuit board. The tactile switch generates a switch signal upon actuation of the tactile switch in response to a force on a packaging structure of the sensor array.Type: ApplicationFiled: September 23, 2008Publication date: March 25, 2010Applicant: AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD.Inventors: Hung Kwang Lee, Sai Mun Lee, Yat Kheng Leong
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Publication number: 20090279270Abstract: A dual-channel optical navigation system with vertically aligned sensors. The dual-channel optical navigation system includes a circuit board, a contact navigation sensor, and a free-space navigation sensor. The circuit board mechanically supports and electrically connects multiple navigation sensors on opposing sides of the circuit board. The contact navigation sensor is coupled to a first side of the circuit board. The contact navigation sensor generates a contact navigation signal based on contact navigation images of a contact navigation surface approximately adjacent to the dual-channel optical navigation system. The free-space navigation sensor is coupled to a second side of the circuit board. The free-space navigation sensor generates a free-space navigation signal based on free-space navigation images of an operating environment of the dual-channel optical navigation system.Type: ApplicationFiled: May 9, 2008Publication date: November 12, 2009Applicant: AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD.Inventors: Hun Kwang Lee, Yat Kheng Leong, Sai Mun Lee
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Publication number: 20090262368Abstract: A light pipe for an optical navigation system. The light pipe includes a collection surface, a collimation surface, and a reflective surface. The collection surface is to accept incident light into the light pipe from a light source. The collimation surface is to collimate the light and to direct the collimated light to a navigation plane for detection by a navigation sensor. The reflective surface is between the collection surface and the collimation surface and is to reflect the light along a reflective path as the light travels within the light pipe from the collection surface to the collimation surface. The reflective surface has a curved geometry oriented substantially along the path of travel of the light through the light pipe. The curved geometry of the reflective path facilitates convergence of the light with respect to a first axis.Type: ApplicationFiled: April 18, 2008Publication date: October 22, 2009Applicant: AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD.Inventors: Yat Kheng Leong, Sai Mun Lee, Kok Khian Ng
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Publication number: 20090140984Abstract: A self-calibrating optical feedback system for an optical navigation device. The self-calibrating optical feedback system includes a light source, an illumination lens, a beam splitter, and an optical feedback device. The illumination lens is coupled relative to the light source. The light source emits light based on a programming current. The illumination lens directs the light towards a beam splitter. The beam splitter partially reflects the light directed from the illumination lens. The optical feedback device detects the partially reflected light from the beam splitter and generates a feedback signal to modify an intensity of the light emitted by the light source. Embodiments of the self-calibrating optical feedback system maintain the output intensity of a laser driven optical navigation device below an eye-safety level.Type: ApplicationFiled: November 29, 2007Publication date: June 4, 2009Applicant: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Kee Seng Soo, Yat Kheng Leong, Sai Mun Lee
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Publication number: 20090141000Abstract: A system and method for performing optical navigation uses an imaging lens, which is positioned between a target surface and an image sensor array, that is orientated to be substantially horizontal with respect to the target surface such that the optical axis of the imaging lens is substantially perpendicular to the target surface.Type: ApplicationFiled: November 30, 2007Publication date: June 4, 2009Applicant: AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD.Inventors: Thineshwaran Gopal Krishnan, Yat Kheng Leong, Sai Mun Lee
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Publication number: 20080288205Abstract: An optical navigation device for operation in a surface navigation mode and a free space navigation mode is described. One embodiment of the optical navigation device includes a microcontroller, a surface navigation sensor, and a free space navigation sensor. The surface and free space navigation sensors are coupled to the microcontroller. The microcontroller is configured to process a movement of the optical navigation device. The surface navigation sensor is configured to generate a surface navigation signal in response to a surface navigation image. The free space navigation sensor is configured to generate a free space navigation signal in response to a free space navigation image. Embodiments of the optical navigation device facilitate an integrated optical solution to provide desktop navigation and scene navigation in a single optical navigation device.Type: ApplicationFiled: May 16, 2007Publication date: November 20, 2008Inventors: Edward Kah Ching Teoh, Yat Kheng Leong, Jin Kiong Ang, Wui Pin Lee, Ban Kuan Koay
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Publication number: 20080117439Abstract: An optical navigation system and method of estimating motion uses an optical structure configured to collimate light propagating along a first direction and to internally reflect the light off an output reflective surface of the optical structure downward along a second direction perpendicular to the first direction toward a target surface. The optical structure is also configured to transmit the light reflected from the target surface through the output reflective surface toward an image sensor.Type: ApplicationFiled: December 20, 2006Publication date: May 22, 2008Inventors: Yat Kheng Leong, Hun Kwang Lee, Sai Mun Lee, Gladys Su Yin Fan