| 摘要 |
An LED projector has a main body containing a switching power supply 1. Current entering the switching power supply 1 is rectified and then input to a process control mainboard 3 which is connected to an operating control digital board and LEDs 15 on LED substrate 9. A light variation structure 12 which may be a grating 12 or a 2D grating (17, fig 10) is set in front of LEDs 15, along with a Freznel lens (13, fig 10). The relative position between the grating 12, the 2D grating (17, fig 10) and the Freznel lens (13, Fig 10) may be changed. |
