CN-116560171-B - Light source module

Abstract

The invention provides a light source module which comprises a phase delay layer, a first light source, a second light source, a first polarization beam splitting layer, a second polarization beam splitting layer, a first refraction layer and a second refraction layer. The phase delay layer, the first light source, the second light source, the first polarization beam splitting layer, the second polarization beam splitting layer, the first refraction layer and the second refraction layer are symmetrically arranged relative to the symmetry axis. The first light source and the second light source each emit polarized light having a first linear polarization direction and polarized light having a second linear polarization direction. The phase retardation layer is used for converting the first linear polarization direction of polarized light into the second linear polarization direction. The polarization splitting layer allows polarized light having a first linear polarization direction to pass through but reflects polarized light having a second linear polarization direction. The refraction layer is used for reflecting polarized light with a second linear polarization direction.

Inventors

• LI PENG

Assignees

• 苏州佳世达光电有限公司
• 佳世达科技股份有限公司

Dates

Publication Date

20260505

Application Date

20220128

Claims (16)

1. 1. A light source module, comprising: The first light source and the second light source are symmetrically arranged relative to the symmetry axis and are used for emitting first polarized light with a first linear polarization direction and second polarized light with a second linear polarization direction; the first polarization beam splitting layer and the second polarization beam splitting layer are symmetrically arranged relative to the symmetry axis; a first phase delay layer disposed between the first polarization beam splitting layer and the second polarization beam splitting layer, and The first refraction layer and the second refraction layer are symmetrically arranged relative to the symmetry axis; The first phase delay layer is used for converting the first linear polarization direction of the first polarized light into the second linear polarization direction, the first polarization splitting layer and the second polarization splitting layer allow the first polarized light with the first linear polarization direction to penetrate but reflect the first polarized light with the second linear polarization direction, and the first refraction layer and the second refraction layer are used for reflecting the polarized light with the second linear polarization direction; The light path of the first polarized light emitted by the first light source sequentially passes through the first polarization beam splitting layer, the first phase delay layer and the second polarization beam splitting layer; the light path of the first polarized light emitted by the second light source passes through the second polarized light splitting layer, the first phase delay layer and the first polarized light splitting layer in sequence; wherein, the light path of the second polarized light emitted by the first light source sequentially passes through the first refraction layer and the first polarization splitting layer; the light path of the second polarized light emitted by the second light source sequentially passes through the second refraction layer and the second polarized light splitting layer.
2. 2. The light source module of claim 1, wherein the first retarder is disposed on the symmetry axis.
3. 3. The light source module of claim 1, wherein the first light source and the second light source are further configured to emit third polarized light having the second linear polarization direction, wherein an optical path of the third polarized light emitted by the first light source sequentially passes through the first refraction layer and the first polarization beam splitting layer, and an optical path of the third polarized light emitted by the second light source sequentially passes through the second refraction layer and the second polarization beam splitting layer.
4. 4. The light source module of claim 1, wherein the first light source and the second light source each comprise a first light-emitting element and a second light-emitting element, the first light-emitting element is configured to emit the first polarized light having the first linear polarization direction, the second light-emitting element is configured to emit the second polarized light having the second linear polarization direction, the first light-emitting element of the first light source is configured with respect to the first polarization beam splitter layer, the second light-emitting element of the first light source is configured with respect to the first refractive layer, the first light-emitting element of the second light source is configured with respect to the second polarization beam splitter layer, and the second light-emitting element of the second light source is configured with respect to the second refractive layer.
5. 5. The light source module of claim 4, wherein the first light source and the second light source each comprise a third light emitting element for emitting third polarized light having the second linear polarization direction, the third light emitting element of the first light source is disposed opposite to the first refraction layer, and the third light emitting element of the second light source is disposed opposite to the second refraction layer.
6. 6. A light source module as recited in claim 1, further comprising: The first prism and the second prism are symmetrically arranged relative to the symmetry axis; the first phase delay layer is formed between the first prism and the second prism.
7. 7. A light source module as recited in claim 6, further comprising: the third prism and the fourth prism are symmetrically arranged relative to the symmetry axis; the first polarization beam splitting layer is formed between the first prism and the third prism, and the second polarization beam splitting layer is formed between the second prism and the fourth prism.
8. 8. The light source module of claim 1, further comprising: a prism symmetrically arranged with respect to the symmetry axis; the first refraction layer and the second refraction layer are configured on the prism.
9. 9. A light source module as recited in claim 7, further comprising: a fifth prism symmetrical with respect to the symmetry axis; The first refraction layer is configured between the fifth prism and the third prism, and the second refraction layer is configured between the fifth prism and the fourth prism.
10. 10. The light source module of claim 1, wherein the first polarized light has a first wavelength and the second polarized light has a second wavelength, the first polarization splitting layer and the second polarization splitting layer allow the polarized light having the first wavelength and the first linear polarization direction to pass through but reflect the polarized light having the first wavelength and the second linear polarization direction.
11. 11. The light source module of claim 1, wherein the first refractive layer and the second refractive layer are reflective layers.
12. 12. The light source module of claim 1, wherein the first refractive layer and the second refractive layer are polarization splitting layers.
13. 13. A light source module as recited in claim 12, further comprising: A third light source for emitting third polarized light having the second linear polarization direction, and And a second phase retardation layer disposed opposite to the third light source and configured to convert the second linear polarization direction of the third polarized light into the first linear polarization direction.
14. 14. The light source module of claim 13, wherein the third polarized light has a second wavelength, and the first refractive layer and the second refractive layer are configured to allow the polarized light having the second wavelength and the first linear polarization direction to pass through but reflect the polarized light having the second wavelength and the second linear polarization direction.
15. 15. The light source module of claim 13, wherein the third light source and the second phase retardation layer are symmetrical with respect to the symmetry axis.
16. 16. The light source module of claim 13, wherein the second retardation layer is disposed opposite to the first refractive layer and the second refractive layer.

Description

Light source module Technical Field The invention relates to a light source module. Background In order to make the projector possess high color rendition and vividness, the color light sources are directly from pure laser diodes with different wavelengths such as red, green or blue. To accommodate small and high lumen commercial projectors, single-package pure tri-color laser diodes are currently being used in the market. However, if the laser diode is improperly configured, color unevenness of the light emission color is easily caused. Therefore, how to enhance the uniformity of the color of the light is an important issue for the skilled person. Disclosure of Invention The present invention provides a light source module capable of improving the conventional problems. The first light source and the second light source are symmetrically arranged relative to the symmetry axis, the first light source and the second light source are used for emitting first polarized light with a first linear polarization direction and second polarized light with a second linear polarization direction, the first polarized light splitting layer and the second polarized light splitting layer are symmetrically arranged relative to the symmetry axis, the first phase delay layer is arranged between the first polarized light splitting layer and the second polarized light splitting layer, the first refraction layer and the second refraction layer are symmetrically arranged relative to the symmetry axis, the first phase delay layer is used for converting the first linear polarization direction of the first polarized light into the second linear polarization direction, the first polarized light splitting layer and the second polarized light splitting layer allow the first polarized light with the first linear polarization direction to penetrate and reflect the first polarized light with the second linear polarization direction, the first refraction layer and the second refraction layer are used for reflecting polarized light with the second linear polarization direction, and the first polarized light and the second polarized light with different light respectively. Preferably, the light path of the first polarized light emitted by the first light source sequentially passes through the first polarization beam splitting layer, the first phase delay layer and the second polarization beam splitting layer, and the light path of the first polarized light emitted by the second light source sequentially passes through the second polarization beam splitting layer, the first phase delay layer and the first polarization beam splitting layer. Preferably, the light path of the second polarized light emitted by the first light source sequentially passes through the first refraction layer and the first polarization beam splitting layer, and the light path of the second polarized light emitted by the second light source sequentially passes through the second refraction layer and the second polarization beam splitting layer. Preferably, the first light source and the second light source are further used for emitting third polarized light with the second linear polarization direction, the light path of the third polarized light emitted by the first light source sequentially passes through the first refraction layer and the first polarization beam splitting layer, and the light path of the third polarized light emitted by the second light source sequentially passes through the second refraction layer and the second polarization beam splitting layer. Preferably, the first light source and the second light source both comprise a first light emitting element and a second light emitting element, the first light emitting element is used for emitting the first polarized light with the first linear polarization direction, the second light emitting element is used for emitting the second polarized light with the second linear polarization direction, the first light emitting element of the first light source is configured relative to the first polarized light splitting layer, the second light emitting element of the first light source is configured relative to the first refraction layer, the first light emitting element of the second light source is configured relative to the second polarized light splitting layer, and the second light emitting element of the second light source is configured relative to the second refraction layer. Preferably, the first light source and the second light source both comprise a third light emitting element, the third light emitting element is used for emitting the third polarized light with the second linear polarization direction, the third light emitting element of the first light source is configured relative to the first refraction layer, and the third light emitting element of the second light source is configured relative to the second refraction layer. Preferably, the optical fiber further comprises a first prism and a sec