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.
55 Citations
13 Claims
-
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”
-
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