Illumination device and image projection apparatus including the same

An illumination device, comprising:

• a plurality of light emitting devices;
• at least an array of taper light pipes, disposed in front of the light source;
• and
• a uniform illuminating means, disposed in front of the array taper light pipes and covering a range of the array of taper light pipes from which a light is coming out.

An illumination device, comprises:

• at least a light source;
• at least an array of taper light pipes, disposed in front of the light source;
• an array of gradient refractive index lenses, disposed in front of the array of taper light pipes to cover a surface range from which a light coming out;
• and
• a converging means, in front of the array of gradient refractive index lenses.

An illumination device, comprising:

• at least a light source;
• at least an array of taper light pipes, disposed in front of the light source;
• a first lens array in front of the array of the taper light pipes;
• a second lens array in front of the first lens array;
• a plurality of polarization converters in front of the second lens array;
• and
• a converging means in front of the polarization converters.

An image projecting apparatus, comprising:

• a green illumination device;
• a green light valve with respect to the green illumination device to collect a green light emitted from the green illumination device;
• a blue illumination device;
• a blue light valve with respect to the blue illumination device to collect a blue light emitted from the blue illumination device;
• a red illumination device;
• a red light valve with respect to the red illumination device to collect a red light emitted from the red illumination device;
• a color synthesizing means located at a position, to receive and synthesize the green light, the blue light and the red light transmitting through the green, blue and red light valves;
• wherein each of the green, blue, and red illumination devices further comprising at least:
• a light source;
• an array of taper light pipes;
• and
• a uniformizing device.