Light source module

Abstract

This invention provides a light source module comprising a phase retardation layer, a first light source, a second light source, a first polarization beam splitter, a second polarization beam splitter, a first refractive layer, and a second refractive layer. The phase retardation layer, the first light source, the second light source, the first polarization beam splitter, the second polarization beam splitter, the first refractive layer, and the second refractive layer are symmetrically arranged relative to a symmetry axis. The first light source and the second light source each emit polarized light with a first linear polarization direction and polarized light with a second linear polarization direction. The phase retardation layer converts the first linear polarization direction of the polarized light into the second linear polarization direction. The polarization beam splitter allows the polarized light with the first linear polarization direction to pass through but reflects the polarized light with the second linear polarization direction. The refractive layer reflects the polarized light with the second linear polarization direction.

Description

Technical Field

[0001] This invention relates to a light source module. Background Technology

[0002] To achieve high color fidelity and vibrancy in projectors, the color light source comes directly from pure laser diodes of different wavelengths, such as red, green, or blue. To accommodate small-sized, high-lumen commercial projectors, single-package pure tri-color laser diodes are currently widely used in the market. However, improper configuration of the laser diodes can easily lead to uneven color output. Therefore, enhancing the uniformity of color output is an important issue for companies in this field. Summary of the Invention

[0003] This invention proposes a light source module that can improve upon conventional problems.

[0004] To achieve the above objectives, the present invention proposes a light source module comprising: a first light source and a second light source, symmetrically arranged relative to an axis of symmetry, wherein the first light source and the second light source are both used to emit first polarized light having a first linear polarization direction and second polarized light having a second linear polarization direction; a first polarization beam splitter layer and a second polarization beam splitter layer, symmetrically arranged relative to the axis of symmetry; a first phase retardation layer disposed between the first polarization beam splitter layer and the second polarization beam splitter layer; and a first refractive layer and a second refractive layer, symmetrically arranged relative to the axis of symmetry; wherein the first phase retardation layer is used to convert the first linear polarization direction of the first polarized light into the second linear polarization direction; the first polarization beam splitter layer and the second polarization beam splitter layer allow the first polarized light having the first linear polarization direction to pass through but reflect the first polarized light having the second linear polarization direction; the first refractive layer and the second refractive layer are used to reflect the polarized light having the second linear polarization direction; and the first polarized light and the second polarized light have different colors.

[0005] Preferably, the optical path of the first polarized light emitted by the first light source passes through the first polarization beam splitter, the first phase retardation layer and the second polarization beam splitter in sequence; the optical path of the first polarized light emitted by the second light source passes through the second polarization beam splitter, the first phase retardation layer and the first polarization beam splitter in sequence.

[0006] Preferably, the light path of the second polarized light emitted by the first light source passes through the first refractive layer and the first polarized beam splitter in sequence; the light path of the second polarized light emitted by the second light source passes through the second refractive layer and the second polarized beam splitter in sequence.

[0007] Preferably, the first light source and the second light source are also used to emit third polarized light having the second linear polarization direction; the optical path of the third polarized light emitted by the first light source passes through the first refractive layer and the first polarization beam splitter in sequence; the optical path of the third polarized light emitted by the second light source passes through the second refractive layer and the second polarization beam splitter in sequence.

[0008] Preferably, both the first light source and the second light source include a first light-emitting element and a second light-emitting element; the first light-emitting element is used to emit the first polarized light having the first linear polarization direction, and the second light-emitting element is used to emit the second polarized light having the second linear polarization direction; the first light-emitting element of the first light source is configured relative to the first polarization beam splitter, and the second light-emitting element of the first light source is configured relative to the first refractive layer; the first light-emitting element of the second light source is configured relative to the second polarization beam splitter, and the second light-emitting element of the second light source is configured relative to the second refractive layer.

[0009] Preferably, both the first light source and the second light source include a third light-emitting element; the third light-emitting element is used to emit the third polarized light having the second linear polarization direction, the third light-emitting element of the first light source is disposed relative to the first refractive layer; the third light-emitting element of the second light source is disposed relative to the second refractive layer.

[0010] Preferably, it further includes: a first prism and a second prism, which are symmetrically arranged with respect to the axis of symmetry; wherein the first phase delay layer is formed between the first prism and the second prism.

[0011] Preferably, it also includes a third prism and a fourth prism, which are symmetrically arranged with respect to the axis of symmetry; wherein 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.

[0012] Preferably, it further includes: a fifth prism, symmetrical with respect to the axis of symmetry; wherein the first refractive layer is disposed between the fifth prism and the third prism, and the second refractive layer is disposed between the fifth prism and the fourth prism.

[0013] Preferably, it also includes: a prism, symmetrically arranged with respect to the axis of symmetry; wherein the first refractive layer and the second refractive layer are disposed on the prism.

[0014] Preferably, the first polarized light has a first wavelength, and the second polarized light has a second wavelength. The first polarization beam splitter and the second polarization beam splitter allow polarized light with the first wavelength and the first linear polarization direction but reflect polarized light with the first wavelength and the second linear polarization direction.

[0015] Preferably, the first refractive layer and the second refractive layer are reflective layers.

[0016] Preferably, the first refractive layer and the second refractive layer are polarized beam-splitting layers.

[0017] Preferably, it further includes: a third light source for emitting third polarized light having the second linear polarization direction; and a second phase retardation layer disposed relative to the third light source and used to convert the second linear polarization direction of the third polarized light into the first linear polarization direction.

[0018] Preferably, the third polarized light has a second wavelength; the first refractive layer and the second refractive layer are used to allow polarized light having the second wavelength and the first linear polarization direction to pass through but reflect polarized light having the second wavelength and the second linear polarization direction.

[0019] Preferably, the third light source and the second phase delay layer are symmetrical with respect to the axis of symmetry.

[0020] Preferably, the second phase delay layer is configured relative to the first refractive layer and the second refractive layer.

[0021] Compared with existing technologies, the light source module proposed in this invention includes a symmetry axis, two sets of optical components, and a phase retardation layer. The two optical components are symmetrically arranged relative to this symmetry axis. The phase retardation layer is used to delay the phase of specific light rays and reflect them to the output end via a polarization beam splitter. By using the two symmetrically arranged optical components, uniform energy distribution can be achieved, thereby improving the color uniformity of the light (mixed light) provided by the light source module. Attached Figure Description

[0022] Figure 1 A schematic diagram of a light source module according to an embodiment of the present invention is shown.

[0023] Figure 2 A schematic diagram of a light source module according to another embodiment of the present invention is shown.

[0024] Figure 3 A schematic diagram of a light source module according to another embodiment of the present invention is shown. Detailed Implementation

[0025] To provide a further understanding of the purpose, structure, features, and functions of the present invention, detailed descriptions are provided below with reference to specific embodiments.

[0026] Please refer to Figure 1 The diagram illustrates a light source module 100 according to an embodiment of the present invention. The light source module 100 can be applied to a device that requires a light source, such as a projector, illuminator, display, or other type of device. When applied to a projection device, the light source module 100 can also be referred to as a light combining module.

[0027] The light source module 100 includes a first phase delay layer 110, at least one first light source 120, at least one second light source 130, a first polarization beam splitter (PBS) 140, a second polarization beam splitter 150, a first refractive layer 160, and a second refractive layer 170.

[0028] A first phase delay layer 110 is disposed on the symmetry axis AX. A first light source 120 and a second light source 130 are symmetrically arranged with respect to the symmetry axis AX, and each of the first light source 120 and the second light source 130 is used to emit first polarized light L having a first linear polarization direction. R1,1 (The subscript "R1" indicates the first linear polarization direction) and the second polarized light L with the second linear polarization direction. R2,2 (The subscript "R2" indicates the second linear polarization direction). The first polarization beam splitter 140 and the second polarization beam splitter 150 are symmetrically arranged with respect to the symmetry axis AX. The first refractive layer 160 and the second refractive layer 170 are symmetrically arranged with respect to the symmetry axis AX. The first phase retardation layer 110 is used to refract the first polarized light L... R1,1 The first linear polarization direction is converted into the second linear polarization direction (its light is in the direction of L). R2,1 (represented); the first polarization beam splitter 140 and the second polarization beam splitter 150 allow polarized light with a first linear polarization direction (e.g., first polarized light L). R1,1 (e.g., first polarized light L) penetrates but reflects polarized light with a second linear polarization direction. R2,1 The first refractive layer 160 and the second refractive layer 170 are used to reflect polarized light with a second linear polarization direction. The first polarized light L... R1,1 and the second polarization light L R2,2 They each have different colors of light.

[0029] Compared to asymmetrical configurations, since the first light source 120, the first refractive layer 160, and the first polarized beam-splitting layer 140 in this disclosed embodiment are symmetrical with respect to the axis of symmetry AX as the second light source 130, the second refractive layer 170, and the second polarized beam-splitting layer 150 are symmetrical, the first polarized light L emitted by the first light source 120 is... R1,1 The second polarized light L emitted by the second light source 130 R2,2 The color uniformity of the mixed light after light is emitted from the polarized spectral layer is better.

[0030] The first linear polarization direction is, for example, one of the P-polarization direction and the S-polarization direction, while the second linear polarization direction is, for example, the other of the P-polarization direction and the S-polarization direction. In this disclosed embodiment, the first linear polarization direction is illustrated using the P-polarization direction and the second linear polarization direction using the S-polarization direction as examples. Furthermore, the first polarized light L... R1,1 (The subscript "1" indicates the first wavelength) It has the first wavelength, while the second polarized light L R2,2(The subscript "2" indicates a second wavelength) It has a second wavelength. The first wavelength is, for example, one of red, blue, and green light, and the second wavelength is, for example, another of red, blue, and green light, wherein the wavelength of red light is, for example, between about 620 nanometers (nm) and about 750 nm, the wavelength of blue light is, for example, between about 450 nm and about 495 nm, and the wavelength of green light is, for example, between about 495 nm and about 570 nm. In this disclosed embodiment, the first wavelength is described using the red light wavelength and the second wavelength using the blue light wavelength as examples.

[0031] The first phase delay layer 110 is, for example, a half-wave plate (HWP). Figure 1 As shown, the extension direction of the first phase delay layer 110 is approximately parallel to or coincides with the axis of symmetry AX.

[0032] like Figure 1 As shown, the first polarized light L emitted by the first light source 120 R1,1 The light path sequentially passes through the first polarization beam splitter layer 140, the first phase retardation layer 110, and the second polarization beam splitter layer 150, and is reflected from the second polarization beam splitter layer 150 to the module 10. The module 10 is, for example, an illumination module or an imaging module. The first polarized light L emitted by the second light source 130... R1,1 The optical path passes sequentially through the second polarization beam splitter 150, the first phase delay layer 110 and the first polarization beam splitter 140, and is reflected from the first polarization beam splitter 140 to the module 10.

[0033] like Figure 1 As shown, the second polarized light L emitted by the first light source 120 R2,2 The light path sequentially passes through the first refractive layer 160 and the first polarized beam-splitting layer 140, and after penetrating the first polarized beam-splitting layer 140, it enters the module 10. The second polarized light L emitted by the second light source 130... R2,2 The light path passes sequentially through the second refractive layer 170 and the second polarized beam splitter 150, and then enters the module 10 after penetrating the second polarized beam splitter 150.

[0034] like Figure 1 As shown, the first light source 120 includes at least one first light-emitting element 121 and at least one second light-emitting element 122. The first light-emitting element 121 is used to emit first polarized light L having a first linear polarization direction. R1,1 The second light-emitting element 122 is used to emit second polarized light L having a second linear polarization direction. R2,2 The first light-emitting element 121 of the first light source 120 is configured relative to the first polarized beam-splitting layer 140, therefore the first polarized light L emitted by the first light source 120... R1,1It can be incident on the first polarized beam-splitting layer 140. The second light-emitting element 122 of the first light source 120 is disposed opposite to the first refractive layer 160, so the second polarized light L emitted by the first light source 120 R2,2 It can be incident on the first refractive layer 160.

[0035] like Figure 1 As shown, the second light source 130 includes at least one first light-emitting element 131 and at least one second light-emitting element 132. The first light-emitting element 131 is used to emit first polarized light L having a first linear polarization direction. R1,1 The second light-emitting element 132 is used to emit second polarized light L having a second linear polarization direction. R2,2 The first light-emitting element 131 of the second light source 130 is configured relative to the second polarization beam splitter 150, therefore the first polarized light L emitted by the first light source 120... R1,1 It can be incident on the second polarized beam-splitting layer 150. The second light-emitting element 132 of the second light source 130 is disposed opposite to the second refractive layer 170, therefore the second polarized light L emitted by the second light source 130 R2,2 It can be incident on the second refractive layer 170.

[0036] like Figure 1 As shown, the first light source 120 further includes at least one third light-emitting element 123. The third light-emitting element 123 is used to emit third polarized light L having a second linear polarization direction. R2,3 The third light-emitting element 123 of the first light source 120 is configured relative to the first refractive layer 160, therefore the third polarized light L emitted by the first light source 120... R2,3 It can be incident on the first refractive layer 160. The second light source 130 further includes at least one third light-emitting element 133. The third light-emitting element 133 is used to emit third polarized light L having a second linear polarization direction. R2,3 The third light-emitting element 133 of the second light source 130 is configured relative to the second refractive layer 170, therefore the third polarized light L emitted by the second light source 130... R2,3 It can be incident on the second refractive layer 170. In this embodiment, the third polarized light L R2,3 (The subscript "3" indicates the third wavelength) It has a third wavelength, which is different from the first and second wavelengths mentioned above. The third wavelength is, for example, other colors of light such as red, blue and green, such as the wavelength of green light.

[0037] like Figure 1 As shown, the third polarized light L emitted by the first light source 120 R2,3 The light path sequentially passes through the first refractive layer 160 and the first polarized beam-splitting layer 140, and after penetrating the first polarized beam-splitting layer 140, it enters the module 10. The third polarized light L emitted by the second light source 130... R2,3The light path passes sequentially through the second refractive layer 170 and the second polarized beam splitter 150, and then enters the module 10 after penetrating the second polarized beam splitter 150.

[0038] like Figure 1 As shown, taking the first light source 120 as an example, the first light-emitting element 121, the second light-emitting element 122, and the third light-emitting element 123 are arranged along the Z-axis. Furthermore, multiple first light-emitting elements 121 are arranged in two rows along the X-axis, multiple second light-emitting elements 122 are arranged in one row along the X-axis, and multiple third light-emitting elements 123 are arranged in one row along the X-axis. However, the embodiments of the present invention do not limit the number of rows of the first light-emitting elements 121, the second light-emitting elements 122, and the third light-emitting elements 123, nor do they limit the order in which the first light-emitting elements 121, the second light-emitting elements 122, and the third light-emitting elements 123 are arranged along the Z-axis. The light-emitting elements of the second light source 130 have the same or similar features as the light-emitting elements of the first light source 120, and will not be described further here.

[0039] like Figure 1 As shown, the first polarization beam splitter 140 and the second polarization beam splitter 150, for example, only affect light with a first wavelength (e.g., for light with a first wavelength, polarized light with a first polarization direction is allowed to pass through but polarized light with a second polarization direction is reflected), but light with other wavelengths (e.g., second and third wavelengths) is allowed to pass through (regardless of the polarization state of these wavelengths, they are all allowed to pass through). In other words, in this embodiment, the first polarization beam splitter 140 and the second polarization beam splitter 150 allow polarized light with a first wavelength and a first linear polarization direction to pass through but reflect polarized light with a first wavelength and a second linear polarization direction.

[0040] In this embodiment, the first refractive layer 160 and the second refractive layer 170 are, for example, mirrors that can reflect light having a first polarization direction or a second polarization direction and any wavelength (e.g., a first wavelength, a second wavelength, and a third wavelength).

[0041] Please refer to Figure 2 The diagram illustrates a light source module 200 according to another embodiment of the present invention. The light source module 200 can be applied to devices requiring a light source, such as projectors, illuminators, displays, or other types of devices. When applied to a projection device, the light source module 200 can also be referred to as a light combining module.

[0042] The light source module 200 includes a first phase delay layer 110, at least one first light source 120, at least one second light source 130, a first polarization beam splitter (PBS) 140, a second polarization beam splitter 150, a first refractive layer 160, a second refractive layer 170, a first prism 280A, a second prism 280B, a third prism 280C, a fourth prism 280D, a fifth prism 280E, a first light-transmitting layer 210, a second light-transmitting layer 240, a third light-transmitting layer 250, a fourth light-transmitting layer 260, and a fifth light-transmitting layer 270.

[0043] The light source module 200 has the same or similar technical features as the light source module 100, except that the light source module 200 further includes multiple prisms 280A to 280E. In this embodiment, the first prism 280A, the second prism 280B, the third prism 280C, the fourth prism 280D, and the fifth prism 280E are composed of or connected to form a light combining element.

[0044] like Figure 2 As shown, the first prism 280A and the second prism 280B are symmetrically arranged with respect to the axis of symmetry AX. The third prism 280C and the fourth prism 280D are symmetrically arranged with respect to the axis of symmetry AX. The fifth prism 280E is symmetrically arranged with respect to the axis of symmetry AX, for example, the axis of symmetry AX passes through the center of the fifth prism 280E.

[0045] like Figure 2 As shown, the first phase retardation layer 110 is formed between the first prism 280A and the second prism 280B. The first phase retardation layer 110 can be formed on the surface of the first prism 280A facing the second prism 280B, or on the surface of the second prism 280B facing the first prism 280A, or it can be formed on the third light-transmitting element between the first prism 280A and the second prism 280B. The specific implementations regarding the formation between two optical elements are similar to the former and will not be repeated hereafter. The first polarization beam splitting layer 140 is formed between the first prism 280A and the third prism 280C. The second polarization beam splitting layer 150 is formed between the second prism 280B and the fourth prism 280D. The first refractive layer 160 is disposed between the fifth prism 280E and the third prism 280C. The second refractive layer 170 is disposed between the fifth prism 280E and the fourth prism 280D.

[0046] like Figure 2As shown, a first light-transmitting layer 210 is formed between a first prism 280A and a second prism 280B. A second light-transmitting layer 240 is formed between a first prism 280A and a third prism 280C. A third light-transmitting layer 250 is formed between a second prism 280B and a fourth prism 280D. A fourth light-transmitting layer 260 is formed between a first prism 280A and a fifth prism 280E. A fifth light-transmitting layer 270 is formed between a fourth prism 280D and a fifth prism 280E. The light-transmitting layers have, for example, a transmittance of at least 98%, which can reduce light loss. In another embodiment, the light source module 200 may omit at least one of the first light-transmitting layer 210, the second light-transmitting layer 240, the third light-transmitting layer 250, the fourth light-transmitting layer 260, and the fifth light-transmitting layer 270.

[0047] In terms of manufacturing process, in one embodiment, the first phase retardation layer 110 may pre-form one of the first prism 280A and the second prism 280B, while the first light-transmitting layer 210 may pre-form the other of the first prism 280A and the second prism 280B. The first polarization beam-splitting layer 140 may pre-form one of the first prism 280A and the third prism 280C, while the second light-transmitting layer 240 may pre-form the other of the first prism 280A and the third prism 280C. The second polarization beam-splitting layer 150 may pre-form one of the second prism 280B and the fourth prism 280D, while the third light-transmitting layer 250 may pre-form the other of the second prism 280B and the fourth prism 280D. The first refractive layer 160 can be pre-formed on one of the third prism 280C and the fifth prism 280E, while the fourth light-transmitting layer 260 can be pre-formed on the other of the third prism 280C and the fifth prism 280E. The second refractive layer 170 can be pre-formed on one of the fourth prism 280D and the fifth prism 280E, while the fifth light-transmitting layer 270 can be pre-formed on one of the fourth prism 280D and the fifth prism 280E. The aforementioned "pre-formation method" is, for example, coating, attaching, or spraying techniques.

[0048] Please refer to Figure 3 The diagram illustrates a light source module 300 according to another embodiment of the present invention. The light source module 300 can be applied to a device requiring a light source, such as a projector, illuminator, display, or other type of device. When applied to a projection device, the light source module 300 can also be referred to as a light combining module.

[0049] The light source module 300 includes a first phase retardation layer 110, at least one first light source 120, at least one second light source 130, a first polarization beam splitter 140, a second polarization beam splitter 150, a first refractive layer 360, a second refractive layer 370, at least one third light source 390, and a second phase retardation layer 310. The light source module 300 has the same or similar technical features as the light source module 100, except that the light source module 300 further includes a third light source 390 and a second phase retardation layer 310.

[0050] The third light source 390 is used to emit third polarized light L with a second linear polarization direction. R2,3 The third light source 390 includes at least one fourth light-emitting element 391, which emits third polarized light L. R2,3 In another embodiment, the fourth light-emitting element 391 can emit second polarized light L. R2,2 The second phase delay layer 310 is configured relative to the third light source 390, so that the third polarized light L emitted by the third light source 390... R2,3 It can be incident on the second phase retardation layer 310. The second phase retardation layer 310 is used to convert the third polarized light L... R2,3 The second linear polarization direction is converted to the first linear polarization direction (its light is in the direction of L). R1,3 (Represented). The extension direction of the second phase retardation layer 310 is approximately perpendicular to the axis of symmetry AX. The third light source 390 and the second phase retardation layer 310 are symmetrical about the axis of symmetry AX; for example, the axis of symmetry AX passes through the center of the third light source 390 and the center of the second phase retardation layer 310. The second phase retardation layer 310 is configured relative to the first refractive layer 360 and the second refractive layer 370, such that light passing through the second phase retardation layer 310 can be incident on both the first refractive layer 360 and the second refractive layer 370.

[0051] like Figure 3 As shown, the first refractive layer 360 and the second refractive layer 370 are, for example, polarized beam-splitting layers. For example, the first refractive layer 360 and the second refractive layer 370 only affect light having a second wavelength and a third wavelength (e.g., allowing light having a second wavelength and a third wavelength to have polarized light with a first polarization direction, such as polarized light L). R1,3 Polarized light that passes through but reflects a second polarization direction (e.g., polarized light L) R2,3 L R2,2 However, light with other wavelengths (e.g., the first wavelength) is allowed to pass through (regardless of the polarization state of the light in this wavelength band, all light is allowed to pass through).

[0052] like Figure 3 As shown, since the first polarization beam splitter 140 and the second polarization beam splitter 150 only affect light with the first wavelength, the polarized light L with the third wavelength... R1,3and L R2,3 and polarized light L with a second wavelength R2,2 Regardless of its polarization direction, the polarized light can penetrate the first polarization beam splitter layer 140 and the second polarization beam splitter layer 150. The polarized light that penetrates the first polarization beam splitter layer 140 and the second polarization beam splitter layer 150 is incident on module 10.

[0053] In this embodiment, the third polarized light L emitted by the third light source 390 R2,3 It emits green light. Compared to light source modules 100 and 200, light source module 300 provides more green light. Green light accounts for approximately 70% of white light; the higher the proportion of green light, the higher the brightness of the white light. Because the third light source 390 of light source module 300 provides more green light, the brightness of the white light emitted by light source module 300 can be improved.

[0054] In summary, the light source module of this invention includes a symmetry axis, two sets of optical components, and a phase retardation layer. Each optical component includes at least one light source, at least one polarization beam splitter, and at least one refractive layer. The two optical components are symmetrically arranged with respect to this symmetry axis. The phase retardation layer is also symmetrically arranged with respect to this symmetry axis; for example, the extension direction of the phase retardation layer is approximately parallel or perpendicular to the symmetry axis, or the axis passes through the entire length of the phase retardation layer. By using the symmetrically arranged two optical components, uniform energy distribution can be achieved, thereby improving the color uniformity of the light (mixed light) provided by the light source module.

[0055] The present invention has been described in the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A light source module, characterized in that, include: The first light source and the second light source are symmetrically arranged relative to the axis of symmetry. Both the first light source and the second light source are used to emit first polarized light with a first linear polarization direction and second polarized light with a second linear polarization direction. The first polarization beam splitter and the second polarization beam splitter are symmetrically arranged with respect to the axis of symmetry; A first phase delay layer is disposed between the first polarization beam splitter layer and the second polarization beam splitter layer; as well as The first and second refractive layers are symmetrically arranged with respect to the axis of symmetry. The first phase retardation layer is used to convert the first linear polarization direction of the first polarized light into the second linear polarization direction; the first polarization beam splitter and the second polarization beam splitter allow the first polarized light with the first linear polarization direction to pass through but reflect the first polarized light with the second linear polarization direction; the first refractive layer and the second refractive layer are used to reflect the polarized light with the second linear polarization direction; the first polarized light and the second polarized light have different colors. The light path of the first polarized light emitted by the first light source passes through the first polarization beam splitter, the first phase retardation layer, and the second polarization beam splitter in sequence; the light path of the first polarized light emitted by the second light source passes through the second polarization beam splitter, the first phase retardation layer, and the first polarization beam splitter in sequence. The light path of the second polarized light emitted by the first light source passes through the first refractive layer and the first polarized beam splitter in sequence; the light path of the second polarized light emitted by the second light source passes through the second refractive layer and the second polarized beam splitter in sequence.

2. The light source module as described in claim 1, characterized in that, The first phase delay layer is configured on the axis of symmetry.

3. The light source module as described in claim 1, characterized in that, The first light source and the second light source are also used to emit third polarized light having the second linear polarization direction; the optical path of the third polarized light emitted by the first light source passes through the first refractive layer and the first polarization beam splitter in sequence; the optical path of the third polarized light emitted by the second light source passes through the second refractive layer and the second polarization beam splitter in sequence.

4. The light source module as described in claim 1, characterized in that, Both the first light source and the second light source include a first light-emitting element and a second light-emitting element; the first light-emitting element is used to emit the first polarized light having the first linear polarization direction, and the second light-emitting element is used to emit the second polarized light having the second linear polarization direction; the first light-emitting element of the first light source is configured relative to the first polarization beam splitter, and the second light-emitting element of the first light source is configured relative to the first refractive layer; the first light-emitting element of the second light source is configured relative to the second polarization beam splitter, and the second light-emitting element of the second light source is configured relative to the second refractive layer.

5. The light source module as described in claim 4, characterized in that, Both the first light source and the second light source include a third light-emitting element; the third light-emitting element is used to emit third polarized light having the second linear polarization direction, the third light-emitting element of the first light source is disposed relative to the first refractive layer; the third light-emitting element of the second light source is disposed relative to the second refractive layer.

6. The light source module as described in claim 1, characterized in that, Also includes: The first prism and the second prism are symmetrically arranged with respect to the axis of symmetry. The first phase delay layer is formed between the first prism and the second prism.

7. The light source module as described in claim 6, characterized in that, Also includes: The third and fourth prisms are symmetrically arranged with respect to this axis of symmetry. The first polarization beam splitter layer is formed between the first prism and the third prism, and the second polarization beam splitter layer is formed between the second prism and the fourth prism.

8. The light source module as described in claim 1, characterized in that, Including: The prisms are arranged symmetrically with respect to this axis of symmetry; The first refractive layer and the second refractive layer are disposed on the prism.

9. The light source module as described in claim 7, characterized in that, Also includes: The fifth prism is symmetrical about this axis of symmetry; The first refractive layer is disposed between the fifth prism and the third prism, while the second refractive layer is disposed between the fifth prism and the fourth prism.

10. The light source module as described in claim 1, characterized in that, The first polarized light has a first wavelength, and the second polarized light has a second wavelength. The first polarization beam splitter and the second polarization beam splitter allow polarized light with the first wavelength and the first linear polarization direction to pass through but reflect polarized light with the first wavelength and the second linear polarization direction.

11. The light source module as described in claim 1, characterized in that, The first and second refractive layers are reflective layers.

12. The light source module as described in claim 1, characterized in that, The first and second refractive layers are polarized beam-splitting layers.

13. The light source module as described in claim 12, characterized in that, Also includes: A third light source is used to emit third polarized light having the second linear polarization direction; as well as A second phase delay layer is configured relative to the third light source and is used to convert the second linear polarization direction of the third polarized light into the first linear polarization direction.

14. The light source module as described in claim 13, characterized in that, The third polarized light has a second wavelength; the first refractive layer and the second refractive layer are used to allow polarized light having the second wavelength and the first linear polarization direction to pass through but reflect polarized light having the second wavelength and the second linear polarization direction.

15. The light source module as described in claim 13, characterized in that, The third light source and the second phase delay layer are symmetrical about the axis of symmetry.

16. The light source module according to claim 13, characterized in that, The second phase delay layer is configured relative to the first refractive layer and the second refractive layer.

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