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US 10,474,257 B2Granted
Optical navigation device and system with changeable smoothing
AssigneePixart Imaging Inc.
InventorsZi-Hao Tan, Kevin Len-Li Lim
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Abstract
An optical navigation device including an image sensor, a navigation engine, a smoothing engine and an adjusting interface. The image sensor generates image frames. The navigation engine calculates displacement according to the image frames. The smoothing engine changes a smoothing level for smoothing the calculated displacement according to a trigger signal sent from the adjusting interface.
Claims20
An optical navigation device, coupled to a display, the optical navigation device comprising:
- an adjusting interface configured to generate a trigger signal;
- an image sensor configured to capture image frames;
- and
- a processor electrically coupled to the image sensor and the adjusting interface, and configured to
- calculate displacement according to the captured image frames, and
- control a cursor movement on the display using a first smoothing level before receiving the trigger signal, and control the cursor movement on the display using a second smoothing level, different from the first smoothing level, after receiving the trigger signal,
- wherein the first and second smoothing levels are different numbers of successive image frames being averaged, summed, accumulated or delayed in calculating the displacement.
4 more elements
An optical navigation system, comprising:
- a display;
- an optical navigation device configured to capture image frames and output displacement according to the captured image frames;
- an adjusting interface configured to generate a trigger signal;
- and
- a host coupled to the optical navigation device, and configured to receive the outputted displacement, and
- control a cursor movement on the display using a first smoothing level before receiving the trigger signal, and control the cursor movement on the display using a second smoothing level, different from the first smoothing level, after receiving the trigger signal,
- wherein the first and second smoothing levels are different numbers of successive image frames being averaged, summed, accumulated or delayed in calculating the displacement.
4 more elements
An optical navigation system, comprising:
- a display;
- an adjusting interface configured to generate a trigger signal;
- a host coupled to the adjusting interface and configured to output the trigger signal;
- and
- an optical navigation device configured to
- capture image frames,
- calculate displacement according to the captured image frames, and
- control a cursor movement on the display using a first smoothing level before receiving the trigger signal from the host, and control the cursor movement on the display using a second smoothing level, different from the first smoothing level, after receiving the trigger signal from the host,
- wherein the first and second smoothing levels are different numbers of successive image frames being averaged, summed, accumulated or delayed in calculating the displacement.
6 more elements
Dependencies are inferred from the claim text.