Two lamp, single light valve projection system

A projection system comprising:

• a segmented rotatable wheel;
• first and second light sources disposed at an angle with respect to each other and with respect to said wheel such that each light source illuminates a focused spot on a different side of the wheel at the same location;
• power supply means for alternately energizing said first and second light sources during respective different phases of a light source illumination cycle;
• and
• a light valve positioned to receive light from the spot illuminated by the first light source after transmission through the wheel and from the spot illuminated by the second light source after reflection from the wheel, for modulating the received light in response to a signal representing an image to form an image carrying output light beam,
• wherein said wheel has six color filtering segments, three segments which are used in transmission for transmitting different ones of a set of three colors from said first light source toward said light valve and three segments which are used in reflection for reflecting different ones of said three colors from said second light source toward said light valve, said segments being arranged and said wheel being synchronized in rotation with the activation of the first and second light sources such that the path portion from the first light source to said one side of the wheel and the path portion from said other side of the wheel to the light value are coupled by a segment used in transmission when the first light source is energized and said path portion from the second light source to said other side of the wheel and said path portion from said other side of the wheel to the light valve are coupled by a segment used in reflection when the second light source is energized.

a projection system comprising:

• a segmented rotatable wheel;
• first and second light sources disposed at an angle with respect to each other and with respect to said wheel such that each light source illuminates a focused spot on a different side of the wheel at the same location;
• power supply means for alternately energizing said first and second light sources during respective different phases of a light source illumination cycle;
• and
• a light valve positioned to receive light from the spot illuminated by the first light source after transmission through the wheel and from the spot illuminated by the second light source after reflection from the wheel, for modulating the received light in response to a signal representing an image to form an image carrying output light beam,
• wherein said wheel has at least three light filtering segments for producing a set of first, second and third colors, including a first segment for transmitting the first color of said set from said first light source toward said light valve, a second segment for transmitting a second color of said set from said first light source toward said light valve and a third segment for reflecting the third color of said set from said second light source to said light valve.

A projection system comprising:

• a segmented rotatable wheel;
• first and second light sources disposed at an angle with respect to each other and with respect to said wheel such that each light source illuminates a focused spot on a different side of the wheel at the same location;
• power supply means for alternately energizing said first and second light sources during respective different phases of a light source illumination cycle;
• and
• a light valve positioned to receive light from the spot illuminated by the first light source after transmission through the wheel and from the spot illuminated by the second light source after reflection from the wheel, for modulating the received light in response to a signal representing an image to form an image carrying output light beam,
• wherein said wheel has at least three light filtering segments for producing a set of first, second and third colors, including a first segment for transmitting the first color of said set from said first light source toward said light valve, a second segment for reflecting a second color of said set from said second light source toward said light valve and a third segment for reflecting the third color of said set from said second light source to said light valve.