Projection apparatus and light source adjusting method thereof

摘要

A projection apparatus including a digital micro mirror device (DMD), a light source, a lens, a photoelectric conversion device, a decision device and an adjustment module is provided. When the DMD is switched to a first operating state, the DMD reflects a light beam emitted by the light source to the lens. When the DMD is switched to a second operating state, the DMD reflects the light beam to the photoelectric conversion device. The photoelectric conversion device generates a signal value according to a light intensity of the light beam. The decision device compares the signal value with a predetermined value. When the signal value is smaller than the predetermined value, the decision device generates a driving signal value. The driving signal value is used for driving the adjustment module to sequentially adjust a position of the light source along a plurality of axes.

主权项

1. A projection apparatus, comprising:
a digital micro mirror device (DMD), suitable for being switched to a first operating state or a second operating state; a light source, emitting a light beam to the DMD; a lens, wherein when the DMD is switched to the first operating state, the DMD reflects the light beam to the lens; a photoelectric conversion device, wherein when the DMD is switched to the second operating state, the DMD reflects the light beam to the photoelectric conversion device, and the photoelectric conversion device generates a signal value according to a light intensity of the light beam; a decision device, electrically connected to the photoelectric conversion device, and comparing the signal value with a predetermined value, wherein when the signal value is smaller than the predetermined value, the decision device generates a driving signal value; and an adjustment module, electrically connected to the decision device and coupled to the light source, wherein the driving signal value is used for driving the adjustment module to sequentially adjust a position of the light source along a plurality of axes.