Touch controller, touch system, and method for detecting a touch screen
First Claim
1. A method for detecting a touch screen, comprising:
- continuously performing a plurality of full screen driven detections on a touch screen to determine whether at least one external object touches or approaches the touch screen, wherein the touch screen comprises a plurality of first conductive strips and a plurality of second conductive strips, and each of the plurality of full screen driven detections comprises;
simultaneously providing a driving signal to all of the first conductive strips; and
detecting mutual capacitive signals of all of the second conductive strips to generate a 1D (one-dimensional) sensing information based on the signals of all of the second conductive strips while all of the first conductive strips are provided with the driving signal;
performing an updating determination to determine whether a plurality of reference values are updated during a predetermined updating period of time if each of the plurality of full screen driven detections represents that no external object touches or approaches the touch screen; and
updating the reference values based on a first 2D (two-dimensional) sensing information if the updating determination represents that the reference values are not updated during the predetermined updating period of time.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention discloses a touch controller, a touch system, and a method for detecting a touch screen. At first, a full screen driven detection is performed on a touch screen to determine whether at least one external object touches or approaches the touch screen. Then, if the full screen driven detection represents that no external object touches or approaches the touch screen, an updating determination is performed to determine whether a plurality of reference values are updated during a predetermined updating period of time. If the updating determination represents that the reference values are not updated during the predetermined updating period of time, the reference values will be updated based on a first 2D sensing information.
-
Citations
15 Claims
-
1. A method for detecting a touch screen, comprising:
-
continuously performing a plurality of full screen driven detections on a touch screen to determine whether at least one external object touches or approaches the touch screen, wherein the touch screen comprises a plurality of first conductive strips and a plurality of second conductive strips, and each of the plurality of full screen driven detections comprises; simultaneously providing a driving signal to all of the first conductive strips; and detecting mutual capacitive signals of all of the second conductive strips to generate a 1D (one-dimensional) sensing information based on the signals of all of the second conductive strips while all of the first conductive strips are provided with the driving signal; performing an updating determination to determine whether a plurality of reference values are updated during a predetermined updating period of time if each of the plurality of full screen driven detections represents that no external object touches or approaches the touch screen; and updating the reference values based on a first 2D (two-dimensional) sensing information if the updating determination represents that the reference values are not updated during the predetermined updating period of time. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A touch controller, executing the following operations:
-
continuously performing a plurality of full screen driven detections on a touch screen to determine whether at least one external object touches or approaches the touch screen, wherein the touch screen comprises a plurality of first conductive strips and a plurality of second conductive strips, and each of the plurality of full screen driven detections comprises; simultaneously providing a driving signal to all of the first conductive strips; and detecting mutual capacitive signals of all of the second conductive strips to generate a 1D (one-dimensional) sensing information based on the signals of all of the second conductive strips while all of the first conductive strips are provided with the driving signal; performing an updating determination to determine whether a plurality of reference values are updated during a predetermined updating period of time if each of the plurality of full screen driven detections represents that no external object touches or approaches the touch screen; and updating the reference values based on a first 2D (two-dimensional) sensing information if the updating determination represents that the reference values are not updated during the predetermined updating period of time. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A touch system, comprising:
-
a touch screen; and a touch controller, executing the following operations; continuously performing a plurality of full screen driven detection on a touch screen to determine whether at least one external object touches or approaches the touch screen, wherein the touch screen comprises a plurality of first conductive strips and a plurality of second conductive strips, and each of the plurality of full screen driven detections comprises; simultaneously providing a driving signal to all of the first conductive strips; and detecting mutual capacitive signals of all of the second conductive strips to generate a 1D (one-dimensional) sensing information based on the signals of all of the second conductive strips while all of the first conductive strips are provided with the driving signal; performing an updating determination to determine whether a plurality of reference values are updated during a predetermined updating period of time if each of the plurality of full screen; and updating the reference values based on a first 2D (two-dimensional) sensing information if the updating determination represents that the reference values are not updated during the predetermined updating period of time. - View Dependent Claims (12, 13, 14, 15)
-
Specification