Illumination system and display device using the same
First Claim
1. An illumination system for display device, comprising:
- a tube shaped reflector having a tube-shaped wall whose inner surface is reflective, the wall including an aperture extending along a longitudinal axis of the reflector;
plural sets of LEDs arranged on the tube-shaped wall in the reflector, colors of light to be emitted from the LEDs in each of the sets being different, the LEDs in each of the sets being arranged along the longitudinal axis of the reflector to form a linear light source; and
a collecting lens fixed to the reflector in such a way as to fill the aperture of the reflector,wherein the LEDs in a first one of the sets are apart from the LEDs in a second one of the sets at a first distance in a circumferential direction of the reflector; and
the LEDs in the second one of the sets are apart from the LEDs in a third one of the sets at a second distance alone the circumferential direction, where the second distance is equal to the first distance.
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Accused Products
Abstract
An illumination system that makes it possible to generate light with less color irregularity with a simple structure while restraining the increase of size is provided. A tube-shaped reflector having a tube-shaped wall whose inner surface is reflective is provided. The wall includes an aperture extending along a longitudinal axis of the reflector. In the reflector, plural sets of LEDs are arranged, where colors of light to be emitted from the LEDs in each set are different (for example, red, green, or blue LEDs are used for each set). The LEDs in each set are arranged along the longitudinal axis of the reflector to form a linear light source. A collecting lens is fixed to the reflector in such a way as to fill the aperture of the reflector.
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Citations
18 Claims
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1. An illumination system for display device, comprising:
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a tube shaped reflector having a tube-shaped wall whose inner surface is reflective, the wall including an aperture extending along a longitudinal axis of the reflector; plural sets of LEDs arranged on the tube-shaped wall in the reflector, colors of light to be emitted from the LEDs in each of the sets being different, the LEDs in each of the sets being arranged along the longitudinal axis of the reflector to form a linear light source; and a collecting lens fixed to the reflector in such a way as to fill the aperture of the reflector, wherein the LEDs in a first one of the sets are apart from the LEDs in a second one of the sets at a first distance in a circumferential direction of the reflector; and
the LEDs in the second one of the sets are apart from the LEDs in a third one of the sets at a second distance alone the circumferential direction, where the second distance is equal to the first distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17, 18)
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13. An illumination system for display device, comprising:
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a tube shaped reflector having a tube-shaped wall whose inner surface is reflective, the wall including an aperture extending along a longitudinal axis of the reflector; plural sets of LEDs arranged on the tube-shaped wall in the reflector, colors of light to be emitted from the LEDs in each of the sets being different, the LEDs in each of the sets being arranged along the longitudinal axis of the reflector to form a linear light source; and a collecting lens fixed to the reflector in such a way as to fill the aperture of the reflector, wherein the LEDs in a first one of the sets are apart from the LEDs in a second one of the sets at a first distance in a circumferential direction of the reflector; and
the LEDs in the second one of the sets are apart from the LEDs in a third one of the sets at a second distance along the circumferential direction, where the second distance is different from the first distance.
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14. An illumination system for display device, comprising:
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a tube shaped reflector having a tube-shaped wall whose inner surface is reflective, the wall including an aperture extending along a longitudinal axis of the reflector; plural sets of LEDs arranged on the tube-shaped wall in the reflector, colors of light to be emitted from the LEDs in each of the sets being different, the LEDs in each of the sets being arranged along the longitudinal axis of the reflector to form a linear light source; and a collecting lens fixed to the reflector in such a way as to fill the aperture of the reflector, wherein the LEDs in each of the sets are located on a base and the bases are fixed onto the inner surface of the reflector at intervals along a circumferential direction of the reflector.
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Specification