Lighting device for a motor vehicle

A lighting device (1) for a motor vehicle, the lighting device comprising:

• an optical waveguide;
• a printed circuit board having an upper surface and an opposite, lower surface in the vertical direction (Z), wherein the printed circuit board is populated with a first light source and second light source;
• wherein the optical waveguide includes:
• a light-emitting section that forms a closed loop, wherein the light-emitting section propagates light along the light-emitting section based on total internal reflection, wherein the light-emitting section has light-emitting optics along the light-emitting section for emitting a portion of the light propagated along the light-emitting section;
• a first light-entry section;
• a second light-entry section;
• a third light source on the upper surface of the printed circuit board;
• and
• a fourth light source on the lower surface of the printed circuit board;
• wherein the first light-entry section and second light-entry section each have exposed ends with light-entry surfaces through which light enters the respective light-entry sections,
• wherein the light-entry surfaces open into the light-emitting section,
• wherein the exposed end of the first light-entry section is placed such that the light emitted by the first light source enters the first light-entry section through the entry surface,
• wherein the exposed end of the second light-entry section is placed such that the light emitted by the second light source enters the second light-entry section through the entry surface;
• wherein the first light source is on the upper surface of the printed circuit board, and the second light source is on the lower surface of the printed circuit board;
• wherein the optical waveguide has a third light-entry section and a fourth light-entry section,
• wherein the third light-entry section and fourth light-entry section each have an exposed end with an entry surface through which light enters the respective light-entry sections,
• wherein the exposed end on the third light-entry section is placed such that light emitted by the third light source enters the third light-entry section through the entry surface,
• wherein the exposed end of the fourth light-entry section is placed such that light emitted by the fourth light source enters the fourth light-entry section through the entry surface;
• and
• wherein the printed circuit board has a first section, wherein the first light source and second light source are on the first section, and wherein the printed circuit board has a second section, wherein the third light source and fourth light source are on the second section.