Touch scan modes during device charging
First Claim
1. A method comprising:
- scanning a touch sensor panel of a first device in a mode;
receiving a first indication from a power supply circuit of the first device; and
in response to receiving the first indication;
in accordance with a determination that the first indication corresponds to a notification that the first device is not coupled to a charger located external to the first device, setting the mode to a first mode,in accordance with a determination that the first indication corresponds to a signal received at a first time from the charger and indicating that the charger is at the first time supplying charge to the first device, setting the mode to a second mode, andin accordance with a determination that the first indication corresponds to a low power state of a battery of the first device, setting the mode to a third mode,wherein;
the first mode comprises a non-charging scan mode,the second mode comprises a power charging scan mode, the power charging scan mode comprising dynamically changing a length of sample time during a touch scan, andthe third mode comprises a low power consumption mode.
1 Assignment
0 Petitions
Accused Products
Abstract
Touch scan modes for touch sensitive devices during device charge is disclosed. To prevent adverse effects to the touch sensor panel due to inductive noise while the device is charging, the touch controller can switch to a touch scan mode (i.e., power charging touch mode) that can cancel or reduce noise from the touch scan or touch image. Power charging touch modes can include low noise frequency selection, increased number of touch samples employed to calculate an average, and simultaneous sampling. In some examples, a power charging touch mode can be different from a normal touch scan mode (i.e., a touch scan mode when the device is not charging). With the one or more power charging touch modes, false touch readings, erroneous touch location identification, and/or undetected touches can be eliminated or reduced.
31 Citations
18 Claims
-
1. A method comprising:
-
scanning a touch sensor panel of a first device in a mode; receiving a first indication from a power supply circuit of the first device; and in response to receiving the first indication; in accordance with a determination that the first indication corresponds to a notification that the first device is not coupled to a charger located external to the first device, setting the mode to a first mode, in accordance with a determination that the first indication corresponds to a signal received at a first time from the charger and indicating that the charger is at the first time supplying charge to the first device, setting the mode to a second mode, and in accordance with a determination that the first indication corresponds to a low power state of a battery of the first device, setting the mode to a third mode, wherein; the first mode comprises a non-charging scan mode, the second mode comprises a power charging scan mode, the power charging scan mode comprising dynamically changing a length of sample time during a touch scan, and the third mode comprises a low power consumption mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A touch sensor panel comprising:
-
logic configured to scan the touch sensor panel in a mode and to receive a first indication from a power supply circuit, wherein the logic is further configured to, in response to receiving the first indication; in accordance with a determination that the first indication corresponds to a notification that the touch sensor panel is not coupled to a charger located external to the touch sensor panel, set the mode to a first mode, in accordance with a determination that the first indication corresponds to a signal received at a first time from the charger and indicating that the charger is at the first time supplying charge to the touch sensor panel, set the mode to a second mode, and in accordance with a determination that the first indication corresponds to a low power state of a battery, set the mode to a third mode, wherein; the first mode comprises a non-charging scan mode, the second mode comprises a power charging scan mode, the power charging scan mode comprising dynamically changing a length of sample time during a touch scan, and the third mode comprises a low power consumption mode. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
Specification