Method, device, and system for detecting transmitter approaching or touching touch sensitive display
First Claim
1. A method for detecting a transmitter approaching or touching a touch sensitive display, the transmitter transmitting an electrical signal mixed from a plurality of frequencies, the touch sensitive display including sequentially a plurality of second electrodes, common electrodes, a liquid crystal layer and pixel electrodes, wherein the common electrodes include a plurality of first electrodes and a plurality of third electrodes and wherein a plurality of sensing points are formed at intersections of the first and second electrodes;
- the method including the following steps of;
calculating the total signal strength of a received signal corresponding to the electrical signal with respect to each of the first electrodes;
calculating the total signal strength of a received signal corresponding to the electrical signal with respect to each of the second electrodes; and
calculating a relative position between the transmitter and the touch sensitive display according to the calculated total signal strengths of the received signals with respect to each of the first electrodes and the second electrodes,wherein when the third electrodes are coupled to a direct-current (DC) potential to form a shielding region, the total signal strength of the received signal with respect to each of the second electrodes is not calculated.
1 Assignment
0 Petitions
Accused Products
Abstract
A method is provided for detecting a transmitter approaching or touching a touch sensitive display. The transmitter transmits an electrical signal which is mixed from a plurality of signals having different frequencies. The display includes a liquid crystal layer between pixel electrodes and common electrodes and a plurality of second electrodes. The common electrodes include a plurality of first electrodes. A plurality of sensing points is located in the intersections of the plurality of first electrodes and the plurality of second electrodes. The method includes: calculating the total signal strength of a received signal with respect to each of the first electrodes; calculating the total signal strength of a received signal with respect to each of the second electrodes; calculating a relative position between the transmitter and the display according to the calculated total signal strengths of the received signals with respect to each of the first and second electrodes.
-
Citations
16 Claims
-
1. A method for detecting a transmitter approaching or touching a touch sensitive display, the transmitter transmitting an electrical signal mixed from a plurality of frequencies, the touch sensitive display including sequentially a plurality of second electrodes, common electrodes, a liquid crystal layer and pixel electrodes, wherein the common electrodes include a plurality of first electrodes and a plurality of third electrodes and wherein a plurality of sensing points are formed at intersections of the first and second electrodes;
- the method including the following steps of;
calculating the total signal strength of a received signal corresponding to the electrical signal with respect to each of the first electrodes; calculating the total signal strength of a received signal corresponding to the electrical signal with respect to each of the second electrodes; and calculating a relative position between the transmitter and the touch sensitive display according to the calculated total signal strengths of the received signals with respect to each of the first electrodes and the second electrodes, wherein when the third electrodes are coupled to a direct-current (DC) potential to form a shielding region, the total signal strength of the received signal with respect to each of the second electrodes is not calculated. - View Dependent Claims (2, 3, 4, 5)
- the method including the following steps of;
-
6. A touch processing device for detecting a transmitter approaching or touching a touch sensitive display, wherein the transmitter transmits an electrical signal mixed from a plurality of frequencies, and the touch sensitive display includes sequentially a plurality of second electrodes, common electrodes, a liquid crystal layer and pixel electrodes, wherein the common electrodes include a plurality of first electrodes and a plurality of third electrodes and wherein a plurality of sensing points are formed at intersections of the first and second electrodes, the touch processing device being configured for:
-
calculating the total signal strength of a received signal corresponding to the electrical signal with respect to each of the first electrodes; calculating the total signal strength of a received signal corresponding to the electrical signal with respect to each of the second electrodes; and calculating a relative position between the transmitter and the touch sensitive display according to the calculated total signal strengths of the received signals with respect to each of the first electrodes and the second electrodes, wherein when the third electrodes are coupled to a direct-current (DC) potential to form a shielding region, the total signal strength of the received signal with respect to each of the second electrodes is not calculated. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A touch sensitive display system for detecting a transmitter approaching or touching a touch sensitive display, wherein the transmitter transmits an electrical signal mixed from a plurality of frequencies, the touch sensitive display system comprising:
-
the touch sensitive display including sequentially; a plurality of second electrodes; common electrodes; a liquid crystal layer; and pixel electrodes, wherein the common electrodes include a plurality of first electrodes and a plurality of third electrodes and wherein a plurality of sensing points are formed at intersections of the first and second electrodes; and a touch processing device connected to the touch sensitive display, the touch processing device being configured for; calculating the total signal strength of a received signal corresponding to the electrical signal with respect to each of the first electrodes; calculating the total signal strength of a received signal corresponding to the electrical signal with respect to each of the second electrodes; and calculating a relative position between the transmitter and the touch sensitive display according to the calculated total signal strengths of the received signals with respect to each of the first electrodes and the second electrodes, wherein when the third electrodes are coupled to a direct-current (DC) potential to form a shielding region, the total signal strength of the received signal with respect to each of the second electrodes is not calculated. - View Dependent Claims (12, 13, 14, 15, 16)
-
Specification