KEYPAD ASSEMBLY AND METHOD TO ACCESS A CAR
First Claim
Patent Images
1. An optical keypad assembly to access a car, comprising:
- a plurality of keys, each key comprising at least an emitter for emitting visible light and an associated receiver for receiving reflected visible light;
a processing unit configured for controlling emitters and receivers and for determining if a key has been selected by analysing signal generated by the receiver of said key; and
said keys successively selected constituting an identification code entered by a user to access the car,
1 Assignment
0 Petitions
Accused Products
Abstract
A system is provided for vehicle access. Advantageously, the present system includes an optical keypad and an RFID antenna working through a windscreen which can be athermal including a thin metal layer. The keypad measures the reflection of visible light on the fingers of the user. The keypad assembly has very low power consumption as it includes a capacitive sensor for a standby mode. The capacitive sensor shape limits the induction with the RFD antenna. The present system therefore proposes a new access system for which the installation is fully reversible and not harmful to the vehicle.
-
Citations
15 Claims
-
1. An optical keypad assembly to access a car, comprising:
-
a plurality of keys, each key comprising at least an emitter for emitting visible light and an associated receiver for receiving reflected visible light; a processing unit configured for controlling emitters and receivers and for determining if a key has been selected by analysing signal generated by the receiver of said key; and said keys successively selected constituting an identification code entered by a user to access the car, - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for accessing a car by using an optical keypad assembly comprising a plurality of keys, each key comprising at least an emitter for emitting visible light and an associated receiver for receiving reflected visible light, and a processing unit for controlling emitters and receivers and for determining if a key has been selected by analysing signal generated by the receiver of said key;
- keys successively selected constituting an identification code entered by a user to access the car;
the method comprising following steps; successively activating an emitter and an associated receiver during a predetermined period of time for emitting a visible light and detecting the reflected visible light; comparing the signal from the receiver with a value. - View Dependent Claims (11, 12, 13, 14, 15)
- keys successively selected constituting an identification code entered by a user to access the car;
Specification