CAPACITIVE-INDUCTIVE TOUCH SCREEN
First Claim
1. A touch screen comprising the combination of a capacitive touch screen and an inductive touch screen using the same pattern of an ITO sensor panel.
2 Assignments
0 Petitions
Accused Products
Abstract
A touch screen uses a combination of capacitive sensing and inductive sensing applied to the same sensor pattern. A capacitive sensor uses the electric field formed by the columns and rows of the sensor matrix. An inductive sensor uses the magnetic field formed by current flowing in column and row lines to induce an inductive pen. Using the same sensor lines, the magnetic field created by the oscillating inductive pen is detected. Both methods require no moving elements in the sensor and it is possible to combine both method of detections in the same sensor pattern. Using switch matrices, the sensor lines are operated in an open loop fashion for the capacitive detection mode, and are operated in a closed loop fashion for the inductive detection mode.
120 Citations
20 Claims
- 1. A touch screen comprising the combination of a capacitive touch screen and an inductive touch screen using the same pattern of an ITO sensor panel.
- 6. A touch screen comprising an arrangement ITO lines, wherein the arrangement of ITO lines are opened for forming a capacitive touch screen in a first mode of operation, and the arrangement of ITO lines are shorted in order to form a closed for forming an inductive touch screen in a second mode of operation.
-
11. A method of operating a touch screen including a single ITO sensor pattern, the method comprising:
-
using the single ITO line pattern as a capacitive touch screen in a first mode of operation; and using the single ITO line pattern as an inductive touch screen in a second mode of operation. - View Dependent Claims (12, 13, 14, 15)
-
- 16. A method of operating a touch screen including an ITO sensor panel, wherein capacitive and inductive detection are performed on a time-sharing basis.
Specification