METHOD FOR IMPROVING SCAN TIME AND SENSITIVITY IN TOUCH SENSITIVE USER INTERFACE DEVICE
First Claim
1. A method for scanning a plurality of capacitive sensors, the method comprising:
- detecting a stimulus in a field of capacitive sensors comprising said plurality of capacitive sensors;
scanning said field of capacitive sensors to determine a first position of said stimulus in said field of capacitive sensors; and
scanning a subsection of said plurality of capacitive sensors within said field of capacitive sensors at a first sensitivity level,wherein said subsection comprises capacitive sensors proximate to said first position of said stimulus.
6 Assignments
0 Petitions
Accused Products
Abstract
System and method for optimizing the consumption of power while maintaining performance in capacitive sensor arrays. A limited sensing area is used to improve the update rate and sensitivity of a row/column array of capacitive sensors. According to one embodiment, a method is provided for scanning a plurality of capacitive sensors by: detecting a stimulus in the field of capacitive sensors, scanning the field of capacitive sensors to determine the position of the stimulus. Once the position of the stimulus is determined, a subsection of the field comprising window corresponding to the position of the stimulus remains activated while the remaining sensors in the field are deactivated.
-
Citations
20 Claims
-
1. A method for scanning a plurality of capacitive sensors, the method comprising:
-
detecting a stimulus in a field of capacitive sensors comprising said plurality of capacitive sensors; scanning said field of capacitive sensors to determine a first position of said stimulus in said field of capacitive sensors; and scanning a subsection of said plurality of capacitive sensors within said field of capacitive sensors at a first sensitivity level, wherein said subsection comprises capacitive sensors proximate to said first position of said stimulus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method for scanning a capacitive sensor array, the method comprising:
-
detecting a presence of a finger in said capacitive sensor array using a first scan rate; determining a location of said finger in said capacitive sensor array during a first mode; determining a halo of capacitive sensors corresponding to said location of said finger in said capacitive sensor array; scanning said halo of capacitive sensors during a second mode at a second scan rate; and modifying said halo of capacitive sensors according to a displacement of said finger during said second mode. - View Dependent Claims (13, 14, 15)
-
-
16. A system for scanning for a position of a stimulus in a field of sensors, the system comprising:
-
a controller; and an array of sensors, said sensors comprising; a conductive pad; surrounding ground; and a connection coupling said sensors to said controller, wherein, said sensors comprising said array are scanned at a high rate to determine a position of said stimulus during a first state, and a subsection of sensors comprising said position of said stimulus along with a plurality of sensors corresponding to a subsequent displacement of said stimulus is scanned during a second state. - View Dependent Claims (17, 18, 19, 20)
-
Specification