| 摘要 |
A luminous body is described, in particular in the form of a planar lighting device for general lighting or for back-lighting of displays, which luminous body comprises a plurality of light sources ( 2 ), for example LED elements, arranged in a housing ( 10 ), in particular an optical waveguide plate ( 1 ). The optical waveguide plate ( 1 ) forms a first optical medium ( 1 ) with a first optical scattering power, into which the light of the light sources ( 2 ) is coupled. Furthermore, at least one second optical medium ( 5 ) with a second optical scattering power is provided, such that the light propagating in the second optical medium ( 5 ) is at least substantially coupled in from the first optical medium ( 1 ), and the scattering power of at least one of the media is chosen for the purpose of influencing the flow of light in the housing ( 10 ) such that a given brightness distribution of the light on the light emission surface ( 4 ) is achieved. |
