Patent ID: 8690355

Claim:
A projecting apparatus, comprising light emitting diodes, a light guide plate and a projecting component, wherein the light guide plate is mounted between the light emitting diodes and the projecting component, characterized in that: a switching control valve is mounted between the light guide plate and the projecting component, and the switching control valve is switched between an on position and an off position between the light guide plate and the projecting component; wherein when the switching control valve is in the on position, lights of the light guide plate is guided to the projecting component as a light source of the projecting component; when in the off position, the switching control valve cuts off the lights guided from the light guide plate to the projecting component, and thereby cuts off the light source of the projecting components; wherein the switching control valve has a reflection layer mounted on a side thereof to which the light guide plate is connected; and while the switching control valve is switched to the off position, the reflection layer reflects the lights of the light guide plate back to the light guide plate.