| 摘要 |
A projection device with an illumination adjustment function includes a polarization beam splitter (PBS), a display, a light source, a lens module, a power supply unit, a light detection unit and a power controller. The light source emits light to the PBS. The lens module projects the images to be displayed by the display. The power supply unit supplies power for the light source. The light detection unit acquires a digital value of a portion of the light transmitted from the PBS, and compares the digital value with a predetermined digital value to generate a control signal. The power controller adjusts power from the power supply unit to the light source according the control signal until the digital value matches the predetermined digital value of the light from the light source. |
