Light-emitting device for emitting diffuse light

摘要

A light-emitting device which has a plate-shaped light guide (102) having front and rear surfaces (106, 108), being major surfaces, and edge surfaces (110, 112, 114, 116); and a light source (104) arranged at the plate-shaped light guide at such a position that the generated light is entered into the plate-shaped light guide and propagates in a substantial direction of propagation that is parallel with the front surface. At least a portion of the plate-shaped light guide includes a three-dimensional surface structure (118) arranged to provide a controlled light output through at least one of the front and rear surfaces and at least one of the edge surfaces. The controlled light output is controlled in terms of light output characteristics.

主权项

1. A light-emitting system comprising:
a plurality of light-emitting devices arranged adjacent to each other, wherein each of the plurality of light-emitting devices comprises a plate-shaped light guide having front and rear surfaces, being major surfaces, and edge surfaces, each of the edge surfaces being distinct from said major surfaces; and one or more light sources arranged at such a position relative to the plurality of light-emitting devices that the generated light is entered into the plate-shaped light guides and propagates in a substantial direction of propagation that is parallel with the front surfaces, wherein at least a portion of each plate-shaped light guide comprises a three-dimensional surface structure arranged to provide a controlled light output through at least one of the edge surfaces and at least one of the front and rear surfaces, and wherein the controlled light output is controlled in terms of light output characteristics.