| 摘要 |
Methods and systems are described for illumination in different applications. Real thin illumination systems (200) with good luminance uniformity, good efficiency and good colour mixing uniformity are obtained, even if different light sources emitting different colours are used. A plurality of light sources (102), emitting light from different colours, couple their light sideways, i.e. substantially parallel to the plane of light out-coupling, into a light guiding means (104) through recesses (108) distributed over the light guiding means (104). Providing a specially structured surface pattern (106), in combination with light in-coupling parallel to the plane of light out-coupling of the light guiding means (104) allows to obtain a good colour mixing of the differently coloured light originating from the plurality of light sources (102). The light then is only coupled out after it has been in the light guiding means (104) for a significant long time such that the light emanating from different light sources (102) is significantly mixed. The illumination system (200) has an important application in non-emissive displays. |
