ELECTRODE SYSTEM FOR PROXIMITY DETECTION AND HAND-HELD DEVICE WITH ELECTRODE SYSTEM
First Claim
1. Electrical hand-held device, which can be placed on a surface (A), comprising at least a transmission electrode (TE), a reception electrode (RE) and a compensation electrode (CE) arranged between the transmission electrode (TE) and the reception electrode (RE), with which an approach of a hand (D1, D2) to the hand-held device is detectable,wherein from the transmission electrode (TE) a first alternating electric field (AS) and from the compensation electrode (CE) a second alternating electric field (AK) can be radiated, wherein the first alternating electric field (AS) with respect to the second alternating electric field (AK) is phase-delayed and wherein the alternating electric fields (AS, AK) can be coupled into the surface (A) and into the reception electrode (RE),wherein the alternating electric fields (AS, AK) coupled to reception electrode (RE) generate a current (I) in the reception electrode (RE), which is representative of an approach (D1, D2) of a hand to the hand-held device,wherein the transmission electrode (TE) and the reception electrode (RE) on the hand-held device are arranged in such a way, that the sum of the impedances between the transmission electrode (TE) and the reception electrode (RE), which consist ofthe impedance between the transmission electrode (TE) and the surface (A),the impedance of the surface (A) andthe impedance between the surface (A) and the reception electrode (RE) when a hand-held device is placed on a surface (A) exceeds a predetermined value (Z0), which is suitable to keep the current (I) generated in the reception electrode (RE) under a predetermined value (I0).
5 Assignments
0 Petitions
Accused Products
Abstract
An electrical hand-held device is provided with improved proximity detection, which can be placed on a surface and has at least one transmission electrode, at least one reception electrode and at least one compensation electrode arranged between transmission electrode and reception electrode. The transmission electrode and the compensation electrode can be supplied with an electric switching signal of predetermined signal frequency and predetermined signal amplitude. Switching electric signal at the compensation electrode is phase-delayed with respect to the switching electric signal at the transmission electrode. Alternating electric fields radiated at the transmission electrode and the compensation electrode generate a current in the reception electrode, which is representative of an approach of a hand to the hand-held device. The transmission electrode and the reception electrode are arranged in such a way, that the impedance between the transmission electrode and the reception electrode exceeds a predetermined value, which is suitable to keep the current generated in the reception electrode under a predetermined value.
28 Citations
35 Claims
-
1. Electrical hand-held device, which can be placed on a surface (A), comprising at least a transmission electrode (TE), a reception electrode (RE) and a compensation electrode (CE) arranged between the transmission electrode (TE) and the reception electrode (RE), with which an approach of a hand (D1, D2) to the hand-held device is detectable,
wherein from the transmission electrode (TE) a first alternating electric field (AS) and from the compensation electrode (CE) a second alternating electric field (AK) can be radiated, wherein the first alternating electric field (AS) with respect to the second alternating electric field (AK) is phase-delayed and wherein the alternating electric fields (AS, AK) can be coupled into the surface (A) and into the reception electrode (RE), wherein the alternating electric fields (AS, AK) coupled to reception electrode (RE) generate a current (I) in the reception electrode (RE), which is representative of an approach (D1, D2) of a hand to the hand-held device, wherein the transmission electrode (TE) and the reception electrode (RE) on the hand-held device are arranged in such a way, that the sum of the impedances between the transmission electrode (TE) and the reception electrode (RE), which consist of the impedance between the transmission electrode (TE) and the surface (A), the impedance of the surface (A) and the impedance between the surface (A) and the reception electrode (RE) when a hand-held device is placed on a surface (A) exceeds a predetermined value (Z0), which is suitable to keep the current (I) generated in the reception electrode (RE) under a predetermined value (I0).
-
2. Electrical hand-held device, which can be placed on a surface (A), comprising several electrode structures (ES1, ES2), each electrode structure comprising at least one transmission electrode (TE), at least one reception electrode (RE) and at least one compensation electrode (CE) arranged between the transmission electrode (TE) and the reception electrode (RE), wherein with each of the several electrode structures (ES1, ES2) an approach of a hand to the hand-held device is detectable, wherein each of the several electrode structures (ES1, ES2) is formed in such a way that
from the transmission electrode (TE) a first alternating electric field (AS) and from the compensation electrode (CE) a second alternating electric field (AK) can be radiated, wherein the first alternating electric field (AS) with respect to the second alternating electric field (AK) is phase-delayed and wherein the alternating electric fields (AS, AK) can be coupled into the surface (A) and into the reception electrode (RE), the alternating electric fields (AS, AK) coupled into the reception electrode (RE) generate a current (I) in the reception electrode (RE), which is representative of an approach of a hand to the electrode structures (ES1, ES2) on the hand-held device, and transmission electrode (TE) and reception electrode (RE) at the hand-held device are in such a way arranged, that the sum of the impedances between the transmission electrode (TE) and the reception electrode (RE), which consist of the impedance between the transmission electrode (TE) and the surface (A), the impedance of the surface (A) and the impedance between the surface (A) and the reception electrode (RE) when the hand-held device is placed on the surface (A) exceeds a predetermined value (Z0), which is suitable, to keep the current (I) generated in the reception electrode (RE) under a predetermined value (I0).
-
21. Hand-held device with:
-
a casing device, a shifting detection arrangement to generate control data that correlate as such with the shifting of the casing device to a X- and a Y-axial direction, and a hand detection arrangement to generate signals that describe as such the approaching status of a hand facing the casing device, wherein the hand detection arrangement comprises an electrode group with three field electrodes (TE, CE, RE) and a circuit arrangement coupled with these field electrodes, a circuit arrangement is so formed, that at least one of field electrodes (TE, CE, RE) can be supplied with a generator voltage alternating on an operating frequency, and a tapping circuit is provided for generation of an electrode signal that is conducted to a signal control unit implemented as a microcontroller unit (MCU). - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
-
-
31. Electrode system for an arrangement at a hand-held device with at least a transmission electrode (TE), a reception electrode (RE) and a compensation electrode (CE), wherein the compensation electrode (CE) can be arranged between transmission electrode (TE) and the reception electrode (RE), wherein the electrode system is formed in such a way, that
from the transmission electrode (TE) a first alternating electric field (AS) and from the compensation electrode (CE) a second alternating electric field (AK) can be radiated, wherein a first alternating electric field (AS) with respect to a second alternating electric field (AK) is phase-delayed and wherein alternating electric fields (AS, AK) can be coupled into the reception electrode (RE), and alternating electric fields (AS, AK) coupled with the reception electrode (RE) generate a current (I) in the reception electrode (RE), which is representative of an approach of a hand to an electrode system.
Specification