Illumination system, projection apparatus and illumination control method

A projection apparatus, comprising an illumination system, a light valve and a projection lens, wherein:

• the illumination system is configured to provide an illumination beam and comprises an excitation light source, an optical component, a light source driver, a temperature sensing module and a controller, wherein:
• the excitation light source is configured to emit an excitation light beam;
• the optical component is located on a transmission path of the excitation light beam;
• the light source driver is electrically connected with the excitation light source and configured to drive the excitation light source;
• the temperature sensing module is located in a neighboring region of the optical component and configured to sense a temperature of the neighboring region of the optical component to output a sensing voltage;
• and
• the controller is electrically connected with the light source driver and the temperature sensing module, configured to receive the sensing voltage to determine whether the sensing voltage falls out of a predetermined voltage range and configured to output a control signal to the light source driver, so as to adjust the excitation light beam by the light source driver;
• the light valve is located on a transmission path of the illumination beam and configured to convert the image beam into an image beam;
• and
• the projection lens is located on a transmission path of the image beam and configured to convert the illumination beam into a projection beam.

An illumination control method for controlling an illumination system in a projection apparatus, wherein the illumination system comprises an excitation light source, an optical component, a light source driver and a temperature sensing module, the light source driver is configured to drive the excitation light source to emit the excitation light beam, the optical component is located on a transmission path of the excitation light beam, and the temperature sensing module is located in a neighboring region of the optical component, the illumination control method comprising:

• sensing a temperature of the neighboring region of the optical component to output a sensing voltage;
• receiving the sensing voltage and determining whether the sensing voltage falls out of a predetermined voltage range;
• and
• when the sensing voltage falls out of the predetermined voltage range, outputting a control signal to the light source driver, so as to adjust the excitation light beam.