Projection light source from light emitting diodes
First Claim
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1. A projection light source, comprising:
- at least one light emitting diode (LED) mounted on a substrate;
a first set of optical element placed in front of said LED for converting emitted light from said LED into parallel light beam; and
a second set of optical element for projecting said parallel light beam, wherein said first set of optical element is a set of lenses, and wherein said light source is enclosed in a light bulb.
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Abstract
The light emitted from a bank of light emitting diodes is converted through a set of lenses into parallel light beams, which, in turn, is focused or diversified as projection light source. Such a light source can replace traditional incandescent bulb. Reflection mirrors can be used to deflect or reflect the light beams. Phosphorescent material can be added in the transmission path to convert blue or ultraviolet short wave light into white light.
154 Citations
9 Claims
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1. A projection light source, comprising:
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at least one light emitting diode (LED) mounted on a substrate;
a first set of optical element placed in front of said LED for converting emitted light from said LED into parallel light beam; and
a second set of optical element for projecting said parallel light beam, wherein said first set of optical element is a set of lenses, and wherein said light source is enclosed in a light bulb.
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2. A projection light source, comprising:
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at least one light emitting diode (LED) mounted on a substrate;
a first set of optical element placed in front of said LED for converting emitted light from said LED into parallel light beam; and
a second set of optical element for projecting said parallel light beam, wherein said second set of optical element is a Fresnel lens for focusing said parallel light beam as a focused light. - View Dependent Claims (3, 4, 5)
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6. A projection light source, comprising:
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at least one light emitting diode (LED) mounted on a substrate;
a first set of optical element placed in front of said LED for converting emitted light from said LED into parallel light beam; and
a second set of optical element for projecting said parallel light beam, wherein said first set of optical element is a set of lenses, and wherein said second optical element is a concave lens for focusing said parallel light beam.
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7. A projection light source, comprising:
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at least one light emitting diode (LED) mounted on a substrate;
a first set of optical element placed in front of said LED for converting emitted light from said LED into parallel light beam; and
a second set of optical element for projecting said parallel light beam, wherein said second optical element is a concave lens for reflecting said parallel light beam as the light source. - View Dependent Claims (8, 9)
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Specification