CAPACITIVE CONTROL INTERFACE DEVICE INTEGRATED WITH A DISPLAY SCREEN
First Claim
Patent Images
1. A human-machine interface device comprising:
- a display with display pixels distributed in a display area;
display control elements arranged in said display area and used for controlling said display pixels;
capacitive measurement electrodes distributed in said display area;
capacitive means of excitation and detection suited for (i) exciting the capacitive measurement electrodes to an alternating electric potential for excitation with at least one excitation frequency; and
(ii) detecting the presence of command objects in a neighborhood of said capacitive measurement electrodes, on a viewing surface of the display by capacitive coupling between said capacitive measurement electrodes and the one or more command objects; and
at least one guard element arranged near the capacitive measurement electrodes in a layer separate from the capacitive measurement electrodes and the display control elements, and polarized to a guard potential identical or substantially identical to the excitation potential at the one or more excitation frequencies;
wherein at least one display control element is also used as a guard element or as a capacitance measurement electrode.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a man-machine interface device comprising (i) a display with display pixels distributed within a display zone, (ii) display control elements (302, 304) disposed in said display zone and used to control said display pixels, (iii) capacitive measurement electrodes (502) distributed within said display zone, (iv) capacitive excitation and detection means, (v) at least one guard element disposed in proximity to the capacitive measurement electrodes (502), in which at least one display control element (302, 304) is also used as guard element or as capacitive measurement electrode (502). The invention also relates to an apparatus comprising the device.
-
Citations
21 Claims
-
1. A human-machine interface device comprising:
-
a display with display pixels distributed in a display area; display control elements arranged in said display area and used for controlling said display pixels; capacitive measurement electrodes distributed in said display area; capacitive means of excitation and detection suited for (i) exciting the capacitive measurement electrodes to an alternating electric potential for excitation with at least one excitation frequency; and
(ii) detecting the presence of command objects in a neighborhood of said capacitive measurement electrodes, on a viewing surface of the display by capacitive coupling between said capacitive measurement electrodes and the one or more command objects; andat least one guard element arranged near the capacitive measurement electrodes in a layer separate from the capacitive measurement electrodes and the display control elements, and polarized to a guard potential identical or substantially identical to the excitation potential at the one or more excitation frequencies; wherein at least one display control element is also used as a guard element or as a capacitance measurement electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 20)
-
-
17. (canceled)
-
19. (canceled)
-
21-31. -31. (canceled)
Specification