User Interface Responsiveness in an Electronic Device Having a Touch Screen Display
First Claim
1. A method of operating an electronic device that includes a capacitive touch screen display, comprising:
- placing a graphics circuit that renders images to the touch screen display in an inactive mode;
while in the inactive mode, sensing a user input device in a capacitive field of the touch screen prior to the input device contacting the touch screen; and
in response to sensing the user input device within the capacitive field, activating the graphics circuit and rendering an image on the touch screen.
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Accused Products
Abstract
An electronic device with a touch screen display that includes capacitive sensing to determine the point of contact between the display and an input device. The device also includes a graphics circuit for rendering images on the touch screen display. The graphics circuit may be inactivated when not in use. The inactive mode provides a variety of advantages, such as a lower power drain on the power source. The device is further configured to sense the approach of an input device in proximity to the display. The device is configured to start activating the graphics circuit upon sensing the approach of the input device prior to contact with the display. The timing of the activation improves responsiveness of the electronic device.
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Citations
20 Claims
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1. A method of operating an electronic device that includes a capacitive touch screen display, comprising:
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placing a graphics circuit that renders images to the touch screen display in an inactive mode; while in the inactive mode, sensing a user input device in a capacitive field of the touch screen prior to the input device contacting the touch screen; and in response to sensing the user input device within the capacitive field, activating the graphics circuit and rendering an image on the touch screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of operating an electronic device with a capacitive touch screen, comprising:
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placing a graphics circuit in an inactive mode; while in the inactive mode, sensing a disturbance in a capacitive field of the touch screen display prior to sensing a contact with the touch screen display; in response to sensing the disturbance, activating the graphics circuit; and rendering an image on the touch screen display. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An electronic device comprising:
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a touch screen display having an outwardly-extending capacitive field; a sensor that detects a disturbance in the capacitive field caused by a user input device that is distanced away from the touch screen display; a graphics circuit configured to render images on the touch screen display; a battery that powers at least the graphics circuit; a control circuit that maintains the graphics circuit in an inactive mode prior to the sensor detecting the disturbance in the capacitive field, the control circuit configured to activate the graphics circuit to render an image on the touch screen display in response to the sensor detecting the disturbance in the capacitive field and prior to detecting contact with the touch screen. - View Dependent Claims (17, 18, 19, 20)
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Specification