Abstract: A vehicle lamp has at least one transparent element (10), and at least one main light source, whose emitted light passes the optical boundary layers of the at least one transparent element (10) substantially perpendicularly. The at least one transparent element (10) has at least two optical areas (12, 20, 26) with different optical indices of refraction which adjoin one another along at least one optical boundary layer (16, 24), and at least in one of the adjoining optical areas (12), whose index of refraction is greater than the index of refraction of the adjoining optical area (20, 26), the light of at least one light source is coupled via at least one light coupling point (22) into a direction pointing substantially along the at least one optical boundary layer (16, 24), and the introduced light is decoupled via at least one light decoupling point (14).

Abstract: A vehicle lamp has at least one transparent element (10), and at least one main light source, whose emitted light passes the optical boundary layers of the at least one transparent element (10) substantially perpendicularly. The at least one transparent element (10) has at least two optical areas (12, 20, 26) with different optical indices of refraction which adjoin one another along at least one optical boundary layer (16, 24), and at least in one of the adjoining optical areas (12), whose index of refraction is greater than the index of refraction of the adjoining optical area (20, 26), the light of at least one light source is coupled via at least one light coupling point (22) into a direction pointing substantially along the at least one optical boundary layer (16, 24), and the introduced light is decoupled via at least one light decoupling point (14).

Abstract: A device for monitoring air pressure in the tires of a vehicle includes devices for determining the wheel speed or other characteristic variables for the speed of the tires of the vehicle, a device for calculating differential variables on the basis of the wheel speed variables, a device for evaluating the differential variables with respect to a setpoint value deviation and for generating a warning signal if the setpoint value deviation exceeds a threshold value, and a device for directly measuring the air pressure in the tire of a wheel and for transferring an air pressure characteristic variable to the evaluation device. A warning signal is generated if the deviation of the air pressure characteristic variable with respect to a setpoint value exceeds a corresponding threshold value. A method of monitoring tire pressures is also provided.

Abstract: A device for monitoring air pressure in the tires of a vehicle includes devices for determining the wheel speed or other characteristic variables for the speed of the tires of the vehicle, a device for calculating differential variables on the basis of the wheel speed variables, a device for evaluating the differential variables with respect to a setpoint value deviation and for generating a warning signal if the setpoint value deviation exceeds a threshold value, and a device for directly measuring the air pressure in the tire of a wheel and for transferring an air pressure characteristic variable to the evaluation device. A warning signal is generated if the deviation of the air pressure characteristic variable with respect to a setpoint value exceeds a corresponding threshold value. A method of monitoring tire pressures is also provided.