Polarization LED module, and lighting device and projector having the same
First Claim
1. A polarization light emitting diode (LED) module comprising:
- a casing comprising an opening;
a light source configured to emit light;
a reflective polarizer configured to transmit first polarized light of the light emitted from the light source through the opening of the casing toward an external polarization converter, and configured to reflect second polarized light of the light emitted from the light source toward the light source;
a reflector configured to reflect light, which is reflected from the reflective polarizer and traveling toward the light source, toward the reflective polarizer; and
a wavelength plate provided between the reflective polarizer and the reflector and configured to convert the second polarized light into the first polarized light when the second polarized light reflected from the reflective polarizer repetitively passes through the wavelength plate,wherein the light source, the reflective polarizer, the reflector, and the wavelength plate are provided inside the casing.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a polarization light emitting diode (LED) module including: a casing comprising an opening; a light source configured to emit light; a reflective polarizer configured to transmit first polarized light of the light emitted from the light source through the opening of the casing toward an external polarization converter, and configured to reflect second polarized light of the light emitted from the light source toward the light source; and a reflector configured to reflect light, which is reflected from the reflective polarizer and traveling toward the light source, toward the reflective polarizer, wherein the light source, the reflective polarizer and the reflector are provided inside the casing.
17 Citations
25 Claims
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1. A polarization light emitting diode (LED) module comprising:
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a casing comprising an opening; a light source configured to emit light; a reflective polarizer configured to transmit first polarized light of the light emitted from the light source through the opening of the casing toward an external polarization converter, and configured to reflect second polarized light of the light emitted from the light source toward the light source; a reflector configured to reflect light, which is reflected from the reflective polarizer and traveling toward the light source, toward the reflective polarizer; and a wavelength plate provided between the reflective polarizer and the reflector and configured to convert the second polarized light into the first polarized light when the second polarized light reflected from the reflective polarizer repetitively passes through the wavelength plate, wherein the light source, the reflective polarizer, the reflector, and the wavelength plate are provided inside the casing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A polarization light emitting diode (LED) module comprising:
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a casing comprising an opening; a plurality of light emitting diodes configured to emit light, the emitted light comprising; first polarized light having a first oscillating direction; and second polarized light having a second oscillating direction; a transreflective polarizer configured to transmit one of the first and second polarized light through the opening of the casing and configured to reflect the other of the first and second light of the light emitted from the light source toward the plurality of light emitting diodes; a reflector configured to reflect light, which is reflected from the transreflective polarizer and traveling toward the plurality of light emitting diodes, toward the transreflective polarizer; and a wavelength plate provided between the transreflective polarizer and the reflector and configured to convert the other of the first and second light second polarized light into the one of the first and second light second polarized light when the other of the first and second light reflected by the transreflective polarizer repetitively passes through the wavelength plate, wherein the plurality of light emitting diodes, the transreflective polarizer, the reflector, and the wavelength plate are provided inside the casing. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification