TOUCH PAD FOR HANDHELD DEVICE
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Abstract
A touch pad system is disclosed. The system includes mapping the touch pad into native sensor coordinates. The system also includes producing native values of the native sensor coordinates when events occur on the touch pad. The system further includes filtering the native values of the native sensor coordinates based on the type of events that occur on the touch pad. The system additionally includes generating a control signal based on the native values of the native sensor coordinates when a desired event occurs on the touch pad.
6 Citations
55 Claims
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1-36. -36. (canceled)
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37. A method comprising:
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sending information identifying an initial object location on a touch pad to a host device when a signal state is changed from a first state to a second state, determining a difference between a current object location and a prior object location, and generating a message for the host device when the difference is greater than a threshold value, wherein the message comprises the current object location. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45)
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46. A touch pad assembly, comprising:
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a touch pad comprising one or more sensors configured to detect a current object location and a prior object location, a controller configured to filter an output of the current object location when a difference between the current object location and a prior object location is equal to or less than a threshold value, and a user modifiable signal state that can be set to filter the output of the current object location even when the difference in object location is greater than the threshold value.
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47. A method comprising:
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receiving a current object location on a touch pad having a surface and one or more sensors configured to map the surface into native sensor coordinates, generating a message comprising a changed object location when a difference between the current object location and a prior object location exceeds a threshold value that corresponds to a number of sensor levels in the touch pad, and filtering the message from a host device when a user modifiable signal state is in an inactive state. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55)
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Specification