Patents by Inventor Vei-Han Chan
Vei-Han Chan 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).
-
Patent number: 11630245Abstract: A three-dimensional camera having a micro lens (ML) array configured with variable ML height and variable ML shift is described herein. The ML array includes micro lens that are configured to direct backscattered light that is transmitted through an image lens into corresponding pixels. Heights of individual micro lenses within the ML array vary according to image height. For example, the height of micro lenses at the center of the ML array, near the axis of the image lens, may be relatively larger than the height of other micro lenses toward the perimeter of the ML array. Furthermore, the shift of individual micro lenses with respect to corresponding pixels may also vary according to the image height. For example, the shift of micro lenses at the center of the ML array may be relatively smaller than the shift of the other micro lenses toward the perimeter of the ML array.Type: GrantFiled: July 28, 2021Date of Patent: April 18, 2023Assignee: MICROSOFT TECHNOLOGY LICENSING, LLCInventors: Zhanping Xu, Vei-Han Chan
-
Patent number: 11435476Abstract: A three-dimensional time-of-flight (TOF) RGB-IR image sensor is provided, including a signal generator configured to generate a modulated electrical signal. The three-dimensional TOF RGB-IR image sensor may further include a light-emitting diode (LED) configured to receive the modulated electrical signal and emit modulated light. The three-dimensional TOF RGB-IR image sensor may further include a TOF sensor integrated circuit configured to receive light at the light-receiving surface and generate a photoelectrical signal based on the received light. The received light may include ambient light and reflected modulated light. The three-dimensional TOF RGB-IR image sensor may further include a filter array located on the light-receiving surface of the TOF sensor integrated circuit.Type: GrantFiled: October 12, 2018Date of Patent: September 6, 2022Assignee: Microsoft Technology Licensing, LLCInventors: Zhanping Xu, Vei-Han Chan, Sunil Prakash Acharya
-
Publication number: 20210356628Abstract: A three-dimensional camera having a micro lens (ML) array configured with variable ML height and variable ML shift is described herein. The ML array includes micro lens that are configured to direct backscattered light that is transmitted through an image lens into corresponding pixels. Heights of individual micro lenses within the ML array vary according to image height. For example, the height of micro lenses at the center of the ML array, near the axis of the image lens, may be relatively larger than the height of other micro lenses toward the perimeter of the ML array. Furthermore, the shift of individual micro lenses with respect to corresponding pixels may also vary according to the image height. For example, the shift of micro lenses at the center of the ML array may be relatively smaller than the shift of the other micro lenses toward the perimeter of the ML array.Type: ApplicationFiled: July 28, 2021Publication date: November 18, 2021Inventors: Zhanping Xu, Vei-Han Chan
-
Patent number: 11079515Abstract: A three-dimensional time-of-flight (3D TOF) camera having a micro lens (ML) array configured with variable ML height and variable ML shift. The ML array includes micro lens that are configured to direct backscattered light that is transmitted through an image lens into corresponding pixels. Heights of individual micro lenses within the ML array vary according to image height. For example, the height of micro lenses at the center of the ML array, near the axis of the image lens, may be relatively larger than the height of other micro lenses toward the perimeter of the ML array. Furthermore, the shift of individual micro lenses with respect to corresponding pixels may also vary according to the image height. For example, the shift of micro lenses at the center of the ML array may be relatively smaller than the shift of the other micro lenses toward the perimeter of the ML array.Type: GrantFiled: December 18, 2019Date of Patent: August 3, 2021Assignee: Microsoft Technology Licensing, LLCInventors: Zhanping Xu, Vei-Han Chan
-
Publication number: 20210190996Abstract: A three-dimensional time-of-flight (3D TOF) camera having a micro lens (ML) array configured with variable ML height and variable ML shift. The ML array includes micro lens that are configured to direct backscattered light that is transmitted through an image lens into corresponding pixels. Heights of individual micro lenses within the ML array vary according to image height. For example, the height of micro lenses at the center of the ML array, near the axis of the image lens, may be relatively larger than the height of other micro lenses toward the perimeter of the ML array. Furthermore, the shift of individual micro lenses with respect to corresponding pixels may also vary according to the image height. For example, the shift of micro lenses at the center of the ML array may be relatively smaller than the shift of the other micro lenses toward the perimeter of the ML array.Type: ApplicationFiled: December 18, 2019Publication date: June 24, 2021Inventors: Zhanping XU, Vei-Han CHAN
-
Publication number: 20200116862Abstract: A three-dimensional time-of-flight (TOF) RGB-IR image sensor is provided, including a signal generator configured to generate a modulated electrical signal. The three-dimensional TOF RGB-IR image sensor may further include a light-emitting diode (LED) configured to receive the modulated electrical signal and emit modulated light. The three-dimensional TOF RGB-IR image sensor may further include a TOF sensor integrated circuit configured to receive light at the light-receiving surface and generate a photoelectrical signal based on the received light. The received light may include ambient light and reflected modulated light. The three-dimensional TOF RGB-IR image sensor may further include a filter array located on the light-receiving surface of the TOF sensor integrated circuit.Type: ApplicationFiled: October 12, 2018Publication date: April 16, 2020Applicant: Microsoft Technology Licensing, LLCInventors: Zhanping XU, Vei-Han CHAN, Sunil Prakash ACHARYA
-
Patent number: 9923003Abstract: A CMOS time-of-flight image sensor must be robust to interface traps and fixed charges which may be present due to fabrication and which may cause an undesired induced electric field in the silicon substrate. This undesired induced electrical field is reduced by introducing a hydrogen-enriched dielectric material. Further remedial techniques can include applying ultraviolet light and/or performing a plasma treatment. Another possible approach adds a passivation doping layer at a top of the detector as a shield against the undesired induced electric field. One or more of the above techniques can be used to prevent any unstable behavior of the time-of-flight sensor.Type: GrantFiled: June 30, 2015Date of Patent: March 20, 2018Assignee: MICROSOFT TECHNOLOGY LICENSING, LLCInventors: Tamer Elkhatib, Vei-Han Chan, William Qian, Onur Can Akkaya, Swati Mehta, Cyrus Bamji
-
Publication number: 20170005124Abstract: A CMOS time-of-flight image sensor must be robust to interface traps and fixed charges which may be present due to fabrication and which may cause an undesired induced electric field in the silicon substrate. This undesired induced electrical field is reduced by introducing a hydrogen-enriched dielectric material. Further remedial techniques can include applying ultraviolet light and/or performing a plasma treatment. Another possible approach adds a passivation doping layer at a top of the detector as a shield against the undesired induced electric field. One or more of the above techniques can be used to prevent any unstable behavior of the time-of-flight sensor.Type: ApplicationFiled: June 30, 2015Publication date: January 5, 2017Inventors: Tamer Elkhatib, Vei-Han Chan, William Qian, Onur Can Akkaya, Swati Mehta, Cyrus Bamji
-
Patent number: 8822967Abstract: Phase change devices, particularly multi-terminal phase change devices, include first and second active terminals bridged together by a phase-change material whose conductivity can be modified in accordance with a control signal applied to a control electrode. Structure allows application in which an electrical connection can be created between two active terminals, with control of the connection being effected using a separate terminal or terminals. Accordingly, the resistance of the heater element can be increased independently from the resistance of the path between the two active terminals, allowing use of smaller heater elements thus requiring less current to create the same amount of Joule heating per unit area. The resistance of the heating element does not impact the total resistance of the phase change device. Programming control can be placed outside of main signal path through the phase change device, reducing impact of associated capacitance and resistance of the device.Type: GrantFiled: March 28, 2012Date of Patent: September 2, 2014Assignee: Agate Logic, Inc.Inventors: Louis Charles Kordus, II, Antonietta Oliva, Narbeh Derhacobian, Vei-Han Chan
-
Patent number: 8639952Abstract: A programmable logic device (PLD) provides voltage identification (VID) codes to a voltage regulator module having VID capabilities. The voltage regulator module generates supply Vdd and/or body bias Vbb voltages according to a selected VID code. The value of the supply Vdd and/or body bias Vbb voltages generated and applied to the PLD determine the operating characteristics of the PLD. The VID codes can be provided and stored in various ways: by an addressable lookup table (LUT) integrated with the PLD, by a memory device in which the VID codes are transferred from an external memory. The VID codes may also be self-generated by auto-detect circuitry integrated with the PLD. The ability to select a particular VID code for each individual PLD allows the user to optimize operational characteristics of the device to satisfy power and/or performance requirements.Type: GrantFiled: March 9, 2007Date of Patent: January 28, 2014Assignee: Agate Logic, Inc.Inventors: Vei-Han Chan, Louis Charles Kordus, II
-
Patent number: 8486745Abstract: Phase change devices, and particularly multi-terminal phase change devices, include first and second active terminals bridged together by a phase-change material whose conductivity can be modified in accordance with a control signal applied to a control electrode. This structure allows an application in which an electrical connection can be created between the two active terminals, with the control of the connection being effected using a separate terminal or terminals. Accordingly, the resistance of the heater element can be increased independently from the resistance of the path between the two active terminals. This allows the use of smaller heater elements thus requiring less current to create the same amount of Joule heating per unit area. The resistance of the heating element does not impact the total resistance of the phase change device.Type: GrantFiled: June 7, 2007Date of Patent: July 16, 2013Assignee: Agate Logic, Inc.Inventors: Louis Charles Kordus, II, Antonietta Oliva, Narbeh Derharcobian, Vei-Han Chan
-
Publication number: 20120182794Abstract: Phase change devices, particularly multi-terminal phase change devices, include first and second active terminals bridged together by a phase-change material whose conductivity can be modified in accordance with a control signal applied to a control electrode. Structure allows application in which an electrical connection can be created between two active terminals, with control of the connection being effected using a separate terminal or terminals Accordingly, the resistance of the heater element can be increased independently from the resistance of the path between the two active terminals, allowing use of smaller heater elements thus requiring less current to create the same amount of Joule heating per unit area. The resistance of the heating element does not impact the total resistance of the phase change device. Programming control can be placed outside of main signal path through the phase change device, reducing impact of associated capacitance and resistance of the device.Type: ApplicationFiled: March 28, 2012Publication date: July 19, 2012Applicant: Agate Logic Inc.Inventors: Louis Charles Kordus, II, Antonietta Oliva, Narbeh Derhacobian, Vei-Han Chan
-
Patent number: 8222917Abstract: Impedance matching and trimming apparatuses and methods using programmable resistance devices. According to one exemplary embodiment, the impedance matching circuit includes a programmable resistance element, a comparator, a resistor divider having a common node coupled to a first input of the comparator, and an impedance element control circuit coupled between an output of the comparator and the programmable resistance element. The programmable resistance element includes one or more programmable resistance devices (PRDs). Programmed resistances of the programmable resistance element combine with the resistance of an external reference resistor to provide an impedance matched termination. A change in the resistance of the termination impedance causes a change in the output of the comparator.Type: GrantFiled: November 2, 2006Date of Patent: July 17, 2012Assignee: Agate Logic, Inc.Inventors: Antonietta Oliva, Louis Charles Kordus, Vei-Han Chan
-
Patent number: 8183551Abstract: Phase change devices, and particularly multi-terminal phase change devices, include first and second active terminals bridged together by a phase-change material whose conductivity can be modified in accordance with a control signal applied to a control electrode. This structure allows an application in which an electrical connection can be created between the two active terminals, with the control of the connection being effected using a separate terminal or terminals. Accordingly, the resistance of the heater element can be increased independently from the resistance of the path between the two active terminals. This allows the use of smaller heater elements thus requiring less current to create the same amount of Joule heating per unit area. The resistance of the heating element does not impact the total resistance of the phase change device.Type: GrantFiled: November 3, 2005Date of Patent: May 22, 2012Assignee: Agale Logic, Inc.Inventors: Louis Charles Kordus, II, Antonietta Oliva, Narbeh Derhacobian, Vei-Han Chan
-
Method for selectively establishing an electrical connection in a multi-terminal phase change device
Patent number: 8178380Abstract: Phase change devices, and particularly multi-terminal phase change devices, include first and second active terminals bridged together by a phase-change material whose conductivity can be modified in accordance with a control signal applied to a control electrode. This structure allows an application in which an electrical connection can be created between the two active terminals, with the control of the connection being effected using a separate terminal or terminals. Accordingly, the resistance of the heater element can be increased independently from the resistance of the path between the two active terminals. This allows the use of smaller heater elements thus requiring less current to create the same amount of Joule heating per unit area. The resistance of the heating element does not impact the total resistance of the phase change device.Type: GrantFiled: July 9, 2009Date of Patent: May 15, 2012Assignee: Agate Logic, Inc.Inventors: Louis Charles Kordus, II, Antonietta Oliva, Narbeh Derharcobian, Vei-Han Chan -
Patent number: 7910429Abstract: Conventional fabrication of sidewall oxide around an ONO-type memory cell stack usually produces Bird's Beak because prior to the fabrication, there is an exposed sidewall of the ONO-type memory cell stack that exposes side parts of a plurality of material layers respectively composed of different materials. Certain materials in the stack such as silicon nitrides are more difficult to oxidize than other materials in the stack such polysilicon. As a result oxidation does not proceed uniformly along the multi-layered height of the sidewall. The present disclosure shows how radical-based fabrication of sidewall dielectric can help to reduce the Bird's Beak formation. More specifically, it is indicated that short-lived oxidizing agents (e.g.Type: GrantFiled: April 7, 2004Date of Patent: March 22, 2011Assignee: ProMOS Technologies, Inc.Inventors: Zhong Dong, Chuck Jang, Ching-Hwa Chen, Chunchieh Huang, Jin-Ho Kim, Vei-Han Chan, Chung Wai Leung, Chia-Shun Hsiao, George Kovall, Steven Ming Yang
-
Patent number: 7755389Abstract: Reconfigurable electronic structures and circuits using programmable, non-volatile memory elements. The programmable, non-volatile memory elements may perform the functions of storage and/or a switch to produce components such as crossbars, multiplexers, look-up tables (LUTs) and other logic circuits used in programmable logic structures (e.g., (FPGAs)). The programmable, non-volatile memory elements comprise one or more structures based on Phase Change Memory, Programmable Metallization, Carbon Nano-Electromechanical (CNT-NEM), or Metal Nano-Electromechanical device technologies.Type: GrantFiled: January 7, 2009Date of Patent: July 13, 2010Assignee: Agate Logic, Inc.Inventors: Colin Neal Murphy, Narbeh Derhacobian, Louis Charles Kordus, II, Antonietta Oliva, Vei-Han Chan, Thomas E. Stewart, Jr.
-
Patent number: 7746682Abstract: Apparatus and methods for reducing single-event upsets (SEUs) in latch-based circuitry (e.g., static random access memory (SRAM) cells) and other digital circuitry. According to an exemplary embodiment, a latch-based circuit includes a radiation-hardened latch having first and second cross-coupled inverters and first and second programmable resistance devices (PRDs). The first PRD is coupled between the output of the first inverter and the input of the second inverter. The second PRD is coupled between the output of the second inverter and the input of the first inverter. The PRDs may be programmed to low or high-resistance states. When SET to a low-resistance state, the latch of the latch-based circuitry may be accessed to read the current logic state stored by the latch or to write a new logic state into the latch. When RESET to a high-resistance state, the latch is in a radiation-hard state, thereby preventing the latch from generating SEUs.Type: GrantFiled: November 2, 2006Date of Patent: June 29, 2010Assignee: Agata Logic Inc.Inventors: Antonietta Oliva, Vei-Han Chan
-
Publication number: 20100091560Abstract: Phase change devices, and particularly multi-terminal phase change devices, include first and second active terminals bridged together by a phase-change material whose conductivity can be modified in accordance with a control signal applied to a control electrode. This structure allows an application in which an electrical connection can be created between the two active terminals, with the control of the connection being effected using a separate terminal or terminals. Accordingly, the resistance of the heater element can be increased independently from the resistance of the path between the two active terminals. This allows the use of smaller heater elements thus requiring less current to create the same amount of Joule heating per unit area. The resistance of the heating element does not impact the total resistance of the phase change device.Type: ApplicationFiled: July 9, 2009Publication date: April 15, 2010Inventors: Louis Charles Kordus, II, Antonietta Oliva, Narbeh Derharcobian, Vei-Han Chan
-
Patent number: 7696018Abstract: Phase change devices, and particularly multi-terminal phase change devices, include first and second active terminals bridged together by a phase-change material whose conductivity can be modified in accordance with a control signal applied to a control electrode. This structure allows an application in which an electrical connection can be created between the two active terminals, with the control of the connection being effected using a separate terminal or terminals. Accordingly, the resistance of the heater element can be increased independently from the resistance of the path between the two active terminals. This allows the use of smaller heater elements thus requiring less current to create the same amount of Joule heating per unit area. The resistance of the heating element does not impact the total resistance of the phase change device.Type: GrantFiled: May 7, 2008Date of Patent: April 13, 2010Assignee: Agate Logic, Inc.Inventors: Antonietta Oliva, Louis Charles Kordus, II, Narbeh Derharcobian, Vei-Han Chan, Thomas E. Stewart, Jr.