Light assembly for mounting on a bicycle and for providing a lighting function, and lighting system with two such light assemblies

1 . A light system configured for mounting on a bicycle and for implementing a lighting function or part thereof,

wherein the light system comprises two light assemblies configured to implement the lighting function or part thereof;

wherein each of the two light assemblies comprises as a respective integral unit, each having,

a handlebar grip configured for mounting on a distal handle end of a handlebar tube of the bicycle,

a light fixture with at least one light source comprising at least one semiconductor light source,

control electronics for controlling the at least one light source and for realizing the lighting function, and

an operating element for controlling the at least one light source; and

wherein each of the two light assemblies is configured for mounting on the distal handle end as a respective unit;

wherein the two light assemblies include a first light assembly configured to mount as a first integral unit on a first distal handle end of a first handlebar tube of the bicycle, and includes a second light assembly configured to mount as a second integral unit on a second distal handle end of a second handlebar tube opposite to the first distal handle end; and

wherein the light system comprises an electrical signal cable between the two light assemblies, which is configured to transmit synchronisation signals between the two light assemblies for synchronising respective lighting functions generated by the two light assemblies.

2 . The light system according to claim 1 , wherein

the handlebar grip has a substantially hollow cylindrical shape and, on a first end face, an opening for receiving a distal end of a handle end of the handlebar tube of the bicycle; and

the light fixture is arranged on a second end face of the handlebar grip opposite to the first end face.

3 . The light system according to claim 1 , wherein

the handlebar grip has a substantially hollow cylindrical shape and, on a first end face, an opening for receiving a distal end of a handle end of the handlebar tube of the bicycle; and

the operating element is arranged on a circumferential surface of the handlebar grip in the region of the first end face of the handlebar grip.

4 . The light system according to claim 1 , wherein the control electronics comprise a microcontroller on which a computer program is executable, which is programmed to control the at least one light source and the lighting function when running on the microcontroller.

5 . The light system according to claim 4 , wherein the microcontroller and the at least one light source are arranged and electrically contacted on a common main circuit board of the light fixture.

6 . The light system according to claim 1 , wherein the light fixture has at least one optical assembly which is configured to bundle light emitted by the at least one light source in a main radiation direction and/or to deflect it into at least one main emission direction of the lighting function; and

the at least one optical assembly comprises a solid light-transmissive material into which the light emitted by the at least one light source in the main radiation direction is coupled and which comprises at least one boundary surface which is configured to redirect coupled-in light by means of total internal reflection into the main emission direction when it strikes the at least one boundary surface.

7 . The light system according to claim 6 , wherein

the at least one optical assembly is configured to deflect light emitted from the at least one light source in the main radiation direction into two main emission directions directed opposite to each other, and

a first direction of the two main emission directions is directed in the direction of travel of the bicycle equipped with the two light assembly and a second direction of the two main emission directions is directed opposite to the direction of travel of the bicycle.

8 . The light system according to claim 7 , wherein the light fixture has at least two light sources arranged at a distance from each other, a first one of the at least two light sources is configured to emit light which, after being deflected by the at least one optical assembly, is directed in the direction of travel of the bicycle, and a second one of the at least two light sources being configured to emit light which, after being deflected by the at least one optical assembly, is directed opposite to the direction of travel of the bicycle.

9 . The light system according to claim 1 , wherein the at least one light source is configured to emit amber light so that a respective lighting function provided by at least one of the two light assemblies includes a turn signal indicator light function and/or a position light function.

10 . The light system according to claim 9 , wherein

the light fixture comprises at least one further light source which is configured to emit light of a different colour than the at least one light source; and

the light emitted by the at least one further light source is white light either alone or by superposition with the light emitted by the at least one light source, so that a respective lighting function realized by at least one of the two light assemblies includes a position light function.

11 . The light system according to claim 10 , wherein the light fixture comprises at least one further light source which is configured to emit red light, so that a respective the lighting function realized by at least one of the two light assemblies includes a rear light function and/or a brake light function.

12 . The light system according to claim 9 , wherein the light fixture comprises at least one further light source which is configured to emit red light, so that a respective lighting function realized by at least one of the two light assemblies includes a rear light function and/or a brake light function.

13 . The light system according to claim 1 , wherein the operating element is arranged and designed in at least one of the two light assemblies, and is mounted on the handle end of the handlebar tube of the bicycle, so as to be operated by a finger or thumb of a rider of the bicycle equipped with the at least one of the two light assemblies to activate and/or deactivate a respective lighting function depending on the actuation of the operating element by the rider, or to select one of the respective lighting functions that can be realized by the at least one of the two light assemblies.

14 . The light system according to claim 1 , wherein

the light fixture comprises a main circuit board on which the at least one light source is arranged and electrically contacted, and a metal housing;

the main circuit board is thermally coupled to the metal housing so that heat loss produced during operation of the light assembly is dissipated to the environment via the metal housing, and

thermal coupling of the main circuit board to the metal housing is effected via a heat-conductive adhesive connection.

15 . The light system according to claim 1 , wherein

the light system has an electrical connection cable between the two light assemblies and a power source of the bicycle, which is configured to transmit electrical energy from the power source to the two light assemblies.

16 . The light system according to claim 1 , wherein

the light fixture comprises at least one further light source which is configured to emit light of a different colour than the at least one light source; and

the light emitted by the at least one further light source is white light either alone or by superposition with the light emitted by the at least one light source, so that a respective lighting function realized by at least one of the two light assemblies includes a position light function.

17 . The light system according to claim 1 , wherein the light fixture comprises at least one further light source which is configured to emit red light, so that a respective lighting function realized by at least one of the two light assemblies includes a rear light function and/or a brake light function.