Display Activated by the Presence of a User
First Claim
1. A display of the type having both an activated, “
- on”
, state and an inactivated, “
off”
, state, and being switchable between the two, which display incorporates a capacitance sensor, able to detect the near presence of a user, together with circuitry arranged to utilise the output of this sensor to effect activation of the display accordingly.
1 Assignment
0 Petitions
Accused Products
Abstract
A display, typically an electroluminescent display, of the type having both an activated, “on”, state and an inactivated, “off”, state, and being switchable between the two, which display incorporates a capacitance sensor, able to detect the near presence of a user, together with means able to utilise the output of this sensor to effect activation of the display accordingly. Preferably, the capacitance sensor comprises a pair of electrodes, one of which may be a front electrode of the electroluminescent display. The capacitance may be sensed by determining the time taken to charge a capacitance; the capacitance may be charged at two or more rates so as to decrease the time taken to measure the capacitance and so reduce the energy consumed.
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Citations
13 Claims
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1. A display of the type having both an activated, “
- on”
, state and an inactivated, “
off”
, state, and being switchable between the two, which display incorporates a capacitance sensor, able to detect the near presence of a user, together with circuitry arranged to utilise the output of this sensor to effect activation of the display accordingly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- on”
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13. A electroluminescent display of the type having both an activated, “
- on”
, state and an inactivated, “
off”
, state, and which is arranged to be switched between the two states, in which the display incorporates a capacitance sensor comprising a pair of spaced electrodes and electronics arranged to measure the capacitance of the pair and to output a signal in dependence thereon, wherein one of the pair of electrodes is a front electrode arranged to activate light-emitting areas of the electroluminescent display and the other electrode of the pair forms one of a case of the display and a power terminal of a circuit arranged to drive and control the display, the electronics being further arranged to process the signal and to determine the near presence of a user and further to effect activation of the display accordingly in dependence of the presence of the user.
- on”
Specification