| 摘要 |
A flat panel lighting device 1 comprises: a plate of transparent material 2, on which is applied an array of electroluminescent point sources 3 (such as LEDs, quantum wells or laser diodes); a second plate 7 which collimates light from the sources 3; an electrically and thermally conductive layer 4 (which may be transparent) connecting first electrodes of sources 3; and a second conductive layer (6, fig. 2) connecting second electrodes of sources 3. The collimating means 7 may be an array of microprojections with a reflective layer (8, fig.3), refractive microlenses, or a diffraction grating. |
