Cypress Semiconductor Corporation

John Frame

Yansun Xu

Steven Sanders

Brian Todoroff

Brett Alan Spurlock

Viktor Kremin

Andriy Ryshtun

Ke-Cai Zeng

Dmytro Puyda

Jinghui Mu

Jing Mu

Chunguang Xia

KeCai Zeng

Huy Tae

A spatial frequency based capacitive motion system and method of operating the same are disclosed. In one embodiment, the system includes an array of sense cells to sense capacitance variations induced by a detected surface in proximity to the array. The system further includes processing circuitry including one or more differential detectors and a processor to process output signals from the one or more differential detectors to measure displacement of the detected surface in a direction parallel to the array. Other embodiments are also disclosed.

Spatial-frequency-based capacitive motion sensor and method of using the same

A spatial frequency based capacitive motion sensor and method of operating the same are disclosed. In one embodiment, the motion sensor includes an array of sense cells to capacitively sense capacitance variations induced by a surface in proximity to the array. The motion sensor further includes processing circuitry including a multiplexer and a processor to process motion dependent output signals from the array to measure motion of the surface in a direction parallel to a surface of the array. Generally, processor is adapted to execute a program to control the multiplexer to interconnect the sense cells of the array to configure the array as a comb-filter to detect at least one spatial frequency component of the capacitance variations, and to measure motion of the surface in a direction parallel to the array. Other embodiments are also disclosed.

A method of operating an optical navigation system which includes disabling a light source to measure the ambient or external light level, comparing the measurement to a threshold level to determine whether the ambient light would cause false detection and light induced motion, and adjusting sensing parameter(s) to mitigate the effect of the ambient light.

Optical navigation systems and methods for background light detection and avoiding false detection and auto-movement

Optical navigation sensors and methods are provided for use in an input device. In one embodiment, the input device comprises: (i) a button configured to in a first mode of operation of the input device receive user input when a surface of the button is pressed; (ii) an optical navigation sensor (ONS) configured to in a second mode of operation of the input device illuminate an object in proximity to the surface of the button and to sense and provide input related to motion of the object; and (iii) means for disabling input from the ONS in the first mode of operation. Other embodiments are also disclosed.

Optical navigation sensor and method

Optical navigation modules and methods of operating the same to sense relative movement between the optical navigation module and a tracking surface are provided. In one embodiment, the optical navigation module comprises: (i) a light source to illuminate at least a portion of a surface relative to which the optical navigation module is moved; (ii) an integrated circuit (IC) including a photo-detector array (PDA) to detect a light pattern propagated onto the PDA from the surface, and a signal processor to translate changes in the light pattern propagated onto the PDA into data representing motion of the optical navigation module relative to the surface; and (iii) a substrate to which the light source and IC are mounted, the substrate including an aperture in a light path between the surface and the PDA. Other embodiments are also disclosed.

Optical navigation module with capacitive sensor

Embodiments of optical navigation modules (ONM) and methods of operating the same to block auto-movement due to ambient light are described. Generally, the method includes: (i) collecting a plurality of PD signal samples from a photodiode (PD) in an optical navigation module (ONM); (ii) determining a peak-to-peak variation (&#x394;PD) in the plurality of PD signal samples; (iii) comparing the peak-to-peak variation (&#x394;PD) to a specified threshold peak-to-peak variation (&#x394;PD); and (iv) if &#x394;PD is less than &#x394;PD, suppressing reporting of motion data derived from signals from a photodetector array (PDA) in the ONM to block auto-movement in an output from the ONM. Other embodiments are also described.

Adaptive ambient light auto-movement blocking in optical navigation modules

An optical navigation apparatus including a package incorporating a light source and a single die of silicon. The single die of silicon includes a photodiode array configured at the detection plane to receive the speckle pattern of the scattered light from the collection optics, circuitry configured to process signals from the photodiode array to determine changes in position of the apparatus relative to the tracking surface, analog circuitry configured to control and drive current through the light source, interface circuitry configured to communicate position data by outputting the position data via a data interface, a microcontroller comprising a processor core and memory for storing computer-readable code and data, and a system bus configured to communicate instructions and data between the microcontroller and said digital, analog, and interface circuitries. Other embodiments, aspects and features are also disclosed.

Optical navigation system using a single-package motion sensor

One embodiment relates to a user input device for tracking motion. The device includes a tracking ball and a user-accessible touching area for user manipulation of the tracking ball. First and second two-dimensional sensors are positioned at tracking heights away from the tracking ball. The first two-dimensional sensor may be positioned across the tracking ball and opposite to the user-accessible touching area. The second two-dimensional sensor may be positioned at an angle with respect to a z-axis defined as extending from the user-accessible touching area through a center of the tracking ball to the first two-dimensional sensor. Other embodiments, aspects and features are also disclosed.

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Arcadia, CA, United States of America

John Frame