DETERMINING TOUCH ON KEYS OF TOUCH SENSITIVE INPUT DEVICE
First Claim
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1. A method of determining a touched key of a touch sensitive input device including a plurality of touch sensitive keys, the method comprising:
- receiving first signals indicative of touch on one or more of the touch sensitive keys;
selecting a first key as a user-selected key, if the first key is associated with maximum signal among the first signals continuously for longer than a first predetermined period;
receiving second signals indicative of touch on one or more of the touch sensitive keys; and
changing the user-selected key from the first key to a second key, if the second key is associated with the maximum signal among the second signals continuously for longer than a second predetermined period.
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Abstract
A key is determined to be the user-selected key of a touch sensitive input device if the touch on the key is determined to be valid continuously for longer than a first predetermined period of time. Another key may be determined to the user-selected key, replacing the previously determined user-selected key, if the touch on another key is valid continuously for a second predetermined period of time that may be longer than the first predetermined period of time.
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Citations
20 Claims
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1. A method of determining a touched key of a touch sensitive input device including a plurality of touch sensitive keys, the method comprising:
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receiving first signals indicative of touch on one or more of the touch sensitive keys; selecting a first key as a user-selected key, if the first key is associated with maximum signal among the first signals continuously for longer than a first predetermined period; receiving second signals indicative of touch on one or more of the touch sensitive keys; and changing the user-selected key from the first key to a second key, if the second key is associated with the maximum signal among the second signals continuously for longer than a second predetermined period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A touch sensitive input device comprising:
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a plurality of touch sensitive keys; a touch sensor coupled to one or more of the touch sensitive keys and configured to generate touch sensor signals indicative of touch on one or more of the touch sensitive keys; and touch control logic coupled to the touch sensor to receive the touch sensor signals, the touch controller logic configured to; select a first key as a user-selected key, if the first key is associated with maximum signal among first touch sensor signals continuously for longer than a first predetermined period; and change the user-selected key from the first key to a second key, if the second key is associated with the maximum signal among second touch sensor signals continuously for longer than a second predetermined period, the first touch sensor signals corresponding to touches on one or more of the touch sensitive keys over a first plurality of scan periods and the second touch sensor signals corresponding to touches on one or more of the touch sensitive keys over a second plurality of scan periods subsequent to the first plurality of scan periods. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification