“Lip light” automatically controlled by the position of the head
A lighting device for helmet comprises a helmet including an arm to which are fixed a microphone and a lamp, called “lip light”, lighting with at least one lighting level. The device comprises a head tracking system comprising a computer for measuring and collecting data concerning the attitude of the helmet in motion and its position in space. Lamp activation means are automatically controlled by positions calculated by the computer so that the lip light lights, with one of its lighting levels, when it is oriented in a direction contained within a predefined area.
1. A lighting device for a helmet comprising:
a helmet including an arm to which are fixed a microphone and a lamp, the lamp lighting with at least one lighting level;
a head tracking system comprising a computer for measuring and collecting data concerning an attitude of the helmet in motion and a position of the helmet in space; and
lamp activation means, the lamp activation means being automatically controlled by information calculated by the computer defining at least one orientation of the helmet so that the lamp lights to the at least one lighting level, when the helmet is oriented in a direction contained within a predefined area.
2. The lighting device for a helmet according to claim 1 , wherein the lamp activation means are controlled by a switch that has at least two states, “ON” and “OFF”.
3. The lighting device for a helmet according to claim 2 , wherein the “ON” or “OFF” state of the switch is defined for each area of a plurality of areas dividing an instrument panel of a cockpit, each of the areas being contained between a maximum and minimum lateral orientation predefined based on a point and a straight line of the cockpit that are predefined and a maximum and minimum longitudinal orientation predefined based on the predefined point and straight line of the cockpit, the predefined point corresponding to a known position of the helmet and the straight line corresponding to a known orientation of the helmet.
4. The lighting device for a helmet according to claim 3 , wherein the lamp comprises at least one diode of variable intensity, defining a plurality of lighting levels, controlled by a first potentiometer.
5. The lighting device for a helmet according to claim 4 , wherein the lamp comprises a plurality of diodes, the number of diodes lit being controlled by a second potentiometer.
6. The lighting device for a helmet according to claim 5 , wherein lighting levels of each diode comprise a predefined intensity corresponding to the number of diodes lit, the number of diodes lit at a given instant, defining a plurality of lighting levels, being controlled by the second potentiometer.
7. The lighting device for a helmet according to claim 6 , wherein each of the areas of the cockpit corresponds to a predefined lighting level, the first or the second potentiometer being automatically controlled by the orientation of the helmet.