User identification for multi-user touch screens
First Claim
1. A multi-user touch screen system, comprising:
- a touch screen, including,a transparent and electrically conductive surface configured to receive touches from users of the touch screen system;
touch sensitive elements configured to detect a touch on said transparent and electrically conductive surface to generate a touch signal; and
at least one control unit connected to said touch sensitive elements and configured to detect a position of the touch based on the touch signal; and
a touch identification system, including,at least two electrodes;
a plurality of transmitting units configured to transmit a plurality of unique identifying signals, each of the at least two electrodes being associated with one of the plurality of transmitting units; and
a receiving unit connected to the transparent and electrically conductive surface and configured to detect said unique identifying signals and said touch signal,wherein said transmitting units and said receiving unit are arranged with respect to said electrically conductive surface and said at least two electrodes so that said receiving unit detects said unique identifying signals from said transmitting units when a user simultaneously touches the electrically conductive surface and one of the at least two electrodes, andwherein the receiving unit is configured to receive the unique identifying signals as signals separate from the touch signal.
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Accused Products
Abstract
The invention relates to a touch screen system with a touch screen (400) comprising a transparent and electrically conductive surface (450) arranged to receive touches from users (UA, UB) of the touch screen system; and touch sensitive elements (420) arranged to detect the position of said touches on said electrically conductive surface (450). The touch screen system is further comprising a touch identification system (900) comprising at least two electrodes (EA-ED), at least one transmitting unit (910) connected to the electrically conductive surface (450) for transmitting an identifying signal to said electrically conductive surface (450), and at least two receiving units (900A-900D), each connected to at least one of said electrodes (EA-ED) for detecting said identifying signal when a user (UA, UB) simultaneously touches the electrically conductive surface (450) and an electrode (EA-ED) that is connected to the receiving unit (900A-900D).
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Citations
17 Claims
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1. A multi-user touch screen system, comprising:
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a touch screen, including, a transparent and electrically conductive surface configured to receive touches from users of the touch screen system; touch sensitive elements configured to detect a touch on said transparent and electrically conductive surface to generate a touch signal; and at least one control unit connected to said touch sensitive elements and configured to detect a position of the touch based on the touch signal; and a touch identification system, including, at least two electrodes; a plurality of transmitting units configured to transmit a plurality of unique identifying signals, each of the at least two electrodes being associated with one of the plurality of transmitting units; and a receiving unit connected to the transparent and electrically conductive surface and configured to detect said unique identifying signals and said touch signal, wherein said transmitting units and said receiving unit are arranged with respect to said electrically conductive surface and said at least two electrodes so that said receiving unit detects said unique identifying signals from said transmitting units when a user simultaneously touches the electrically conductive surface and one of the at least two electrodes, and wherein the receiving unit is configured to receive the unique identifying signals as signals separate from the touch signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A multi-user touch screen system, comprising:
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a touch screen, including a transparent and electrically conductive surface configured to conduct at least one identifying signal upon direct contact of a user of the touch screen system with the transparent and electrically conductive surface; touch sensitive elements configured to detect a touch on said transparent and electrically conductive surface to generate a touch signal; at least one control unit connected to said touch sensitive elements and configured to detect a position of the touch based on the touch signal; and a touch identification system, including, at least two electrodes; a plurality of transmitting units configured to transmit the identifying signal, each of the at least two electrodes being associated with one of the plurality of transmitting units; and a receiving unit connected to the transparent and electrically conductive surface and configured to detect the transmitted identifying signal and the touch signal, wherein said transmitting units and said receiving unit are arranged with respect to said electrically conductive surface and said at least two electrodes so that the receiving unit detects the transmitted identifying signal from the one of the transmitting units when a user simultaneously touches the electrically conductive surface and one of the at least two electrodes, and wherein the receiving unit is configured to receive the transmitted identifying signal as a signal separate from the touch signal.
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17. A multi-user touch screen system, comprising:
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a touch screen, including, a transparent and electrically conductive surface configured to receive touches from users of the touch screen system; touch sensitive elements configured to detect a touch on said transparent and electrically conductive surface to generate a touch signal; and at least one control unit connected to said touch sensitive elements and configured to detect a position of the touch based on the touch signal; and a touch identification system, including, at least two electrodes; a plurality of transmitting units configured to transmit a plurality of unique identifying signals, each of the at least two electrodes being associated with one of the plurality of transmitting units; and a receiving unit connected to said transparent and electrically conductive surface and configured to detect said unique identifying signals and said touch signal, wherein said transmitting units and said receiving unit are arranged with respect to said electrically conductive surface and said at least two electrodes so that said receiving unit detects said unique identifying signals from said transmitting units when a user simultaneously touches the electrically conductive surface and one of the at least two electrodes, wherein the unique identifying signals are not the same as the touch signal, and wherein the transmitting units and the receiving unit are connected to a same ground potential.
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Specification