Dynamic self-switchable CPI resolution for an optical mouse sensor
View Patent ↗An optical mouse employs an optical mouse controller and an optical mouse sensor. In operation, the optical mouse sensor generates an image sensing report signal indicative of a movement of the optical mouse over a surface of an object and communicates the image sensing report signal to the optical mouse controller based on a CPI resolution setting of the optical mouse sensor. To be responsive to varying applications, the optical mouse sensor detects a dynamic movement variable associated with the movement of the optical mouse over the surface of the object and controls a switching of the CPI resolution setting among at least two different CPI resolutions based on a detection of the dynamic movement variable.
1. An optical mouse, comprising:
an optical mouse controller; and
an optical mouse sensor operable to dynamically set a CPI resolution for generating an image sensing report signal indicative of a movement of the optical mouse over a surface of an object and to communicate the image sensing report signal to the optical mouse controller, wherein dynamically setting the CPI resolution includes
determining a dynamic movement variable associated with the movement of the optical mouse over the surface of the object, and
selecting from amongst a plurality of CPI resolutions, the selecting comprising: a) automatically selecting a high CPI resolution upon determining that the dynamic movement variable falls within a first range of predetermined variable values, and b) automatically selecting a low CPI resolution upon determining that the dynamic movement variable falls within a second range of predetermined variable values, wherein the second range is different than the first range.
2. The optical mouse of claim 1 , wherein the dynamic movement variable is a velocity of the movement of the optical mouse over the surface of the object.
3. The optical mouse of claim 1 , wherein the first range of predetermined variable values correspond to a low velocity range of movement of the optical mouse over the surface of the object; and the second range of the predetermined variable values correspond to a high velocity range of the movement of the optical mouse over the surface of the object.
4. The optical mouse of claim 1 , wherein the dynamic movement variable is an acceleration of the movement of the optical mouse over the surface of the object.
5. The optical mouse of claim 1 , wherein the first range of predetermined variable values correspond to a low acceleration range of movement of the optical mouse over the surface of the object; and wherein the second range of the predetermined variable values correspond to a high acceleration range of the movement of the optical mouse over the surface of the object.
6. The optical mouse of claim 1 , wherein determining the dynamic movement variable is based on a cross-correlation of at least two images of the surface of the object as sensed by the optical motion sensor.
7. The optical mouse of claim 1 , wherein selecting from amongst the plurality of CPI resolutions further comprises using a user CPI resolution preference.
8. An optical mouse, comprising:
an optical mouse controller; and
an optical mouse sensor,
wherein the sensor includes a processor and a memory operable with the processor to dynamically set a CPI resolution for generating an image sensing report signal indicative of a movement of the optical mouse over a surface of an object and to communicate the image sensing report signal to the optical mouse controller,
wherein dynamically setting the CPI resolution includes determining a dynamic movement variable associated with the movement of the optical mouse over the surface of the object, and selecting from amongst a plurality of CPI resolutions, the selecting comprising: a) automatically selecting a high CPI resolution upon determining that the dynamic movement variable falls within a first range of predetermined variable values, and b) automatically selecting a low CPI resolution upon determining that the dynamic movement variable falls within a second range of predetermined variable values.
9. The optical mouse of claim 8 , wherein the dynamic movement variable is a velocity of the movement of the optical mouse over the surface of the object.
10. The optical mouse of claim 8 , wherein the first range of predetermined variable values correspond to a low velocity range of movement of the optical mouse over the surface of the object; and the second range of the predetermined variable values correspond to a high velocity range of the movement of the optical mouse over the surface of the object.
11. The optical mouse of claim 8 , wherein the dynamic movement variable is an acceleration of the movement of the optical mouse over the surface of the object.
12. The optical mouse of claim 8 , wherein the first range of predetermined variable values correspond to a low acceleration range of movement of the optical mouse over the surface of the object; and the second range of the predetermined variable values correspond to a high acceleration range of the movement of the optical mouse over the surface of the object.
13. The optical mouse of claim 8 , wherein determining the dynamic movement variable is based on a cross-correlation of at least two images of the surface of the object as sensed by the optical motion sensor.
14. The optical mouse of claim 8 , wherein selecting from amongst the plurality of CPI resolutions further comprises using a user CPI resolution preference.
15. In an optical mouse including an optical mouse controller and an optical mouse sensor, a method of operating an optical mouse sensor in dynamically setting a CPI resolution for generating an image sensing report signal indicative of a movement of the optical mouse over a surface of an object and communicating the image sensing report signal to the optical mouse controller, the method comprising:
determining a dynamic movement variable associated with the movement of the optical mouse over the surface of the object, and
selecting from amongst a plurality of CPI resolutions, the selecting comprising: a) automatically selecting a high CPI resolution upon determining that the dynamic movement variable falls within a first range of predetermined variable values, and b) automatically selecting a low CPI resolution upon determining that the dynamic movement variable falls within a second range of predetermined variable values.
16. The method of claim 15 , wherein the dynamic movement variable is a velocity of the movement of the optical mouse over the surface of the object.
17. The method of claim 15 , wherein the first range of predetermined variable values correspond to a low velocity range of movement of the optical mouse over the surface of the object; and the second range of the predetermined variable values correspond to a high velocity range of the movement of the optical mouse over the surface of the object.
18. The method of claim 15 , wherein the dynamic movement variable is an acceleration of the movement of the optical mouse over the surface of the object.
19. The method of claim 15 , wherein the first range of predetermined variable values correspond to a low acceleration range of movement of the optical mouse over the surface of the object; and the second range of the predetermined variable values correspond to a high acceleration range of the movement of the optical mouse over the surface of the object.
20. The method of claim 15 , wherein the detection of the dynamic movement variable is based on a cross-correlation of at least two images of the surface of the object as sensed by the optical motion sensor.
21. The method of claim 15 , wherein selecting from amongst the plurality of CPI resolutions further comprises using a user CPI resolution preference.