TOUCH SENSING OUTPUT DEVICE
First Claim
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1. An output device having touch sensor input functionality, comprising:
- at least first and second control electrodes (40,42) lying in a common plane over a common substrate (46) for controlling a light transmission characteristic of the device, anda suspension of charged particles (50) in a layer overlying the common substrate (46),wherein the device is operable in at least two modes, comprising;
a first mode in which the light transmission characteristics are altered by controlling the movement of the charged particles (50) under the influence of control signals applied to the first and second control electrodes (40,42), anda second mode in which the first and second control electrodes (40,42) are coupled to a capacitance sensing means (56), for detecting a change in capacitance caused by the proximity of an object to be detected.
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Abstract
A device having touch sensor input functionality, comprises first and second control electrodes (40,42) lying in a common plane. The device is operable in at least two modes, comprising: a first mode in which the light transmission characteristics are altered by controlling the movement of the charged particles under the influence of control signals applied to the first and second control electrodes; and a second mode in which the first and second control electrodes are coupled to a capacitance sensing means, for detecting a change in capacitance caused by the proximity of an object to be detected.
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Citations
15 Claims
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1. An output device having touch sensor input functionality, comprising:
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at least first and second control electrodes (40,42) lying in a common plane over a common substrate (46) for controlling a light transmission characteristic of the device, and a suspension of charged particles (50) in a layer overlying the common substrate (46), wherein the device is operable in at least two modes, comprising; a first mode in which the light transmission characteristics are altered by controlling the movement of the charged particles (50) under the influence of control signals applied to the first and second control electrodes (40,42), and a second mode in which the first and second control electrodes (40,42) are coupled to a capacitance sensing means (56), for detecting a change in capacitance caused by the proximity of an object to be detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling the light transmission characteristics of an output device and implementing a touch sensor function, using an output device comprising at least first and second control electrodes (40,42) lying in a common plane over a common substrate (46) for controlling a light transmission characteristic of the device and a suspension of charged particles (50) in a layer overlying the common substrate (46), comprising:
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in a first mode, altering the light transmission characteristics by controlling the movement of the charged particles (50) under the influence of control signals applied to the first and second control electrodes (40,42), and in a second mode, coupling the first and second control electrodes (40,42) to a capacitance sensing means, for detecting a change in capacitance caused by the proximity of an object to be detected. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification