Light source module

Abstract

The present invention provides a light source module including a first light source, a first wavelength conversion unit, a second spectroscopic unit, a second light source, a second wavelength conversion unit and a first spectroscopic unit. The first light source emits a first light having a first wavelength. The first wavelength conversion unit converts at least a portion of the first light into a first converted light having a second wavelength. The second spectroscopic unit allows light having a first wavelength to pass through, while reflecting light having a second wavelength. The second light source can emit a second light having a first wavelength. The second wavelength conversion unit can convert at least a portion of the second light into a second converted light having a second wavelength. The first spectroscopic unit is disposed between the first wavelength conversion unit and the second wavelength conversion unit, and is used to reflect light having a first wavelength and allow light having a second wavelength to pass through.

Description

Technical Field

[0001] The present invention relates to a light source module, and in particular to a light source module with increased conversion efficiency. Background Art

[0002] Conventional light source modules provide at least one color light. Generally speaking, the light source of a light source module mostly emits a single color light. In order to increase the color richness of the light emitted by the light source module, a wavelength conversion unit is usually required to change the wavelength of the light emitted by the light source, and more light splitting units are required to obtain the required color light through the characteristics of penetration and / or reflection. However, these components result in a large volume of the light source module.

[0003] Therefore, it is necessary to design a new type of light source module to overcome the above defects. Summary of the invention

[0004] The object of the present invention is to provide a light source module, which realizes a light source module with a small volume and improves conversion efficiency by converting light through a double conversion unit.

[0005] To achieve the above-mentioned object, the present invention provides a light source module, characterized in that it includes: a first light source, which is used to emit a first light with a first wavelength; a first wavelength conversion unit, which is arranged relative to the first light source and is used to convert at least a part of the first light into a first converted light with a second wavelength, and the second wavelength is different from the first wavelength; a second light splitting unit, which is arranged relative to the first wavelength conversion unit and is used to allow one of the first wavelength and the second wavelength to pass through and reflect the other; a second light source, which is arranged relative to the second light splitting unit and is used to emit a second light with the first wavelength; a second wavelength conversion unit, which is arranged relative to the second light splitting unit and is used to convert at least a part of the second light into a second converted light with the second wavelength; and a first light splitting unit, which is arranged between the first wavelength conversion unit and the second wavelength conversion unit and is used to reflect the first wavelength and allow the second wavelength to pass through.

[0006] Preferably, the first light splitting unit is used to reflect the first light and the second light having the first wavelength back to the first wavelength conversion unit and the second wavelength conversion unit respectively, and the first light splitting unit allows the first converted light having the second wavelength to penetrate.

[0007] Preferably, it also includes: a third light source, which is arranged relative to the second splitter unit and emits a third light, wherein the third light has a wavelength different from the second wavelength; wherein the second splitter unit is used to reflect the third light and allow the first converted light and the second converted light having the second wavelength to pass through.

[0008] Preferably, it also includes: a third light source, which is arranged relative to the second splitting unit and emits a third light with the first wavelength; wherein the second splitting unit is used to allow the second light and the third light with the first wavelength to be reflected and the first converted light and the second converted light with the second wavelength to be transmitted.

[0009] Preferably, the third light source and the second light source are respectively located on two opposite sides of the second light splitting unit.

[0010] Preferably, it also includes: a third light source, which is arranged relative to the second splitter unit and emits a third light with the first wavelength; wherein the second splitter unit is used to allow the second light and the third light with the first wavelength to penetrate and the first converted light and the second converted light with the second wavelength to be reflected.

[0011] Preferably, the third light source and the second light source are located on the same side of the second light splitting unit.

[0012] Preferably, it also includes: a fourth light source for emitting a fourth light having a third wavelength, wherein the third wavelength, the second wavelength and the first wavelength are different; and a third spectroscopic unit, which is arranged relative to the second spectroscopic unit and is used to allow the third light having the first wavelength to pass through, the first converted light and the second converted light having the second wavelength to pass through, and the fourth light having the third wavelength to be reflected.

[0013] Preferably, the third light splitting unit and the second wavelength conversion unit are respectively located on two opposite sides of the second light splitting unit.

[0014] Preferably, the second light source and the second wavelength conversion unit are respectively located on two opposite sides of the second light splitting unit.

[0015] Preferably, a reflection unit is further included, and the first light source and the first wavelength conversion unit are configured between the reflection unit and the first light splitting unit.

[0016] Preferably, the first light source has a light emitting surface and a back surface opposite to each other, the first light is emitted from the light emitting surface, and the light source module further comprises: a reflection unit disposed on the back surface and used for reflecting the first light and the second converted light.

[0017] Preferably, the thickness of the first wavelength conversion unit is greater than the thickness of the second wavelength conversion unit.

[0018] Preferably, the first light source, the first wavelength conversion unit, the first light splitting unit, the second wavelength conversion unit and the second light splitting unit are arranged in sequence from the first light source to the second light splitting unit.

[0019] Preferably, two adjacent ones of the first wavelength conversion unit, the first light splitting unit and the second wavelength conversion unit are in contact with each other.

[0020] Preferably, the first light source and the first wavelength conversion unit are in contact with each other.

[0021] Preferably, the first light source and the second light source are respectively located on two opposite sides of the first light splitting unit.

[0022] Preferably, the first wavelength conversion unit has a first surface and a third surface relative to each other, the second wavelength conversion unit has a second surface and a fourth surface relative to each other, the third surface and the fourth surface are respectively located on opposite sides of the first light splitting unit, the first light is incident on the first surface, and the second light is incident on the second surface.

[0023] Preferably, the second light, the first converted light and the second converted light are incident on the same surface of the second light splitting unit.

[0024] Preferably, the second light and the first converted light are incident on two opposite surfaces of the second light splitting unit respectively.

[0025] Compared with the prior art, an optical film set provided by an embodiment of the present invention can be applied to any device that requires light. The optical film set includes two light sources, two wavelength conversion units and two spectroscopic units. The two rays of light emitted by the two light sources are respectively converted into two converted lights with the same wavelength by the two wavelength conversion units, and are emitted through one of the spectroscopic units, while the other spectroscopic unit is located between the two wavelength conversion units and can reflect the light emitted by one of the light sources back to one of the wavelength conversion units. In this way, a small-volume light source module and improved conversion efficiency are achieved by converting light with dual conversion units. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of a light source module according to a first embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a light source module according to another embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of a light source module according to another embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of a light source module according to another embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of a light source module according to another embodiment of the present invention;

[0031] Figure 6 FIG. 4 is a schematic diagram of a light source module according to another embodiment of the present invention. DETAILED DESCRIPTION

[0032] The technical terms in this specification refer to the customary terms in the technical field. If some terms are explained or defined in this specification, the interpretation of these terms shall be based on the explanation or definition in this specification. Each embodiment of the present invention has one or more technical features. Under the premise of possible implementation, a person with ordinary knowledge in the technical field can selectively implement some or all of the technical features in any embodiment, or selectively combine some or all of the technical features in these embodiments.

[0033] Please refer to Figure 1 As shown, Figure 1 FIG. 1 is a schematic diagram of a light source module 100 according to an embodiment of the present invention. The light source module 100 can be applied to a device requiring a light source, such as a projector, an illuminator, a display or other types of devices. For application in a projection device, the light source module 100 can also be called a light combining module.

[0034] The light source module 100 includes a first light source 110 , a first wavelength conversion unit 120 , a first light splitting unit 130 , a second light source 140 , a second wavelength conversion unit 150 , a second light splitting unit 160 and a reflection unit 170 .

[0035] The first light source 110 is used to emit a first light B1 having a first wavelength. The first wavelength conversion unit 120 is disposed relative to the first light source 110, and is used to convert at least a portion of the first light B1 into a first converted light G1 having a second wavelength, which is different from the first wavelength. The second light splitting unit 160 is disposed relative to the first wavelength conversion unit 120, and is used to allow one of the first wavelength and the second wavelength to pass through, while reflecting the other. The second light source 140 is disposed relative to the second light splitting unit 160, and is used to emit a second light B2 having a first wavelength. The second wavelength conversion unit 150 is disposed relative to the second light splitting unit 160, and is used to convert at least a portion of the second light B2 into a second converted light G2 having a second wavelength. The first light splitting unit 130 is disposed between the first wavelength conversion unit 120 and the second wavelength conversion unit 150, and is used to reflect the first wavelength and allow the second wavelength to pass through. In this embodiment, the second light splitting unit 160 is described by taking an example that allows the light having the first wavelength to be reflected, while allowing the light having the second wavelength to pass through.

[0036] As can be seen from the above, the first converted light G1 and the second converted light G2 are converted by two separate wavelength conversion units. Due to the relative relationship of these optical components of the light source module 100, a small-volume light source module 100 can be obtained. In addition, the light emitted by the light source module 100 has a mixed light of two converted lights of the second wavelength, so the light brightness can be increased.

[0037] The first wavelength is, for example, one of red light, blue light and green light, and the second wavelength is, for example, the other of red light, blue light and green light. The first wavelength and the second wavelength of the embodiment of the present invention are respectively illustrated by taking blue light and green light as examples. The first light source 110 and the second light source 140 are, for example, light emitting diodes or laser light sources. The proportion of green light to white light is about 70%. The higher the proportion of green light, the higher the brightness of white light. Since the light emitted by the light source module 100 is a mixture of two green lights (the first converted light G1 and the second converted light G2), the brightness of white light downstream of the optical path can be enhanced.

[0038] like Figure 1 As shown, taking the optical paths of the first light B1 and the first converted light G1 as an example, the first light B1 is emitted from the first light source 110, and is converted into the first converted light G1 after passing through the first wavelength conversion unit 120; the first converted light G1 passes through the first light splitting unit 130, the second wavelength conversion unit 150, and the second light splitting unit 160 in sequence, and is emitted from the second light splitting unit 160. After passing through the second light splitting unit 160, the first converted light G1 is incident on the module 10, such as the lighting module or the imaging module.

[0039] like Figure 1 As shown, in the optical path of the second light B2 and the second converted light G2, the second light B2 is emitted from the second light source 140, reflected by the second light splitting unit 160 to the second wavelength conversion unit 150, and converted into the second converted light G2 by the second wavelength conversion unit 150; the second converted light G2 passes through the first light splitting unit 130, the first wavelength conversion unit 120, the first light source 110, the reflection unit 170, the first wavelength conversion unit 120, the first light splitting unit 130, the second wavelength conversion unit 150 and the second light splitting unit 160 in sequence, and is emitted from the second light splitting unit 160. The second converted light G2 penetrates the second light splitting unit 160 and is incident on the module 10.

[0040] like Figure 1 As shown, the first light source 110 has a light emitting surface 110u and a back surface 110b opposite to each other, and the first light B1 is emitted from the light emitting surface 110u. The reflection unit 170 is disposed on the back surface 110b and is used to reflect the first light B1 and the second converted light G2.

[0041] like Figure 1 As shown, the first light source 110 and the second light source 140 are respectively located at two opposite sides of the first light splitting unit 130 , so that the first light B1 emitted by the first light source 110 and the second light B2 emitted by the second light source 140 are respectively incident on two opposite sides of the first light splitting unit 130 .

[0042] like Figure 1As shown, two adjacent ones of the first light source 110, the first wavelength conversion unit 120, the first light splitting unit 130, the second wavelength conversion unit 150 and the reflection unit 170 are in contact with each other, which can reduce light loss. In addition, in terms of relative positions, the reflection unit 170, the first light source 110, the first wavelength conversion unit 120, the first light splitting unit 130, the second wavelength conversion unit 150 and the second light splitting unit 160 are arranged in sequence from the first light source 110 to the second light splitting unit 160 (e.g., along a straight line).

[0043] like Figure 1 As shown, the first wavelength conversion unit 120 has a first surface 120i and a third surface 120e opposite to each other, and the second wavelength conversion unit 150 has a second surface 150i and a fourth surface 150e opposite to each other, and the third surface 120e and the fourth surface 150e are respectively located at two opposite sides of the first light splitting unit 130. The first light B1 is incident into the first wavelength conversion unit 120 through the first surface 120i, and is converted into the first converted light G1 by the first wavelength conversion unit 120, and the second light B2 is incident into the second wavelength conversion unit 150 through the second surface 150i, and is converted into the second converted light G2 by the second wavelength conversion unit 150. In summary, the first light B1 and the second light B2 are respectively incident into the two separate wavelength conversion units, and the first converted light G1 and the second converted light G2 are respectively converted by the two separate wavelength conversion units.

[0044] The first wavelength conversion unit 120 and the second wavelength conversion unit 150 are conversion units with the same wavelength conversion characteristics. Figure 1 As shown, the first wavelength conversion unit 120 includes a plurality of fluorescent particles 121, which can excite light to convert the wavelength of the light. For example, the first wavelength conversion unit 120 converts the first light B1 having a first wavelength into the first converted light G1 having a second wavelength. The second wavelength conversion unit 150 includes a plurality of fluorescent particles 151, which can excite light to convert the wavelength of the light. For example, the second wavelength conversion unit 150 converts the second light B2 having a first wavelength into the second converted light G2 having a second wavelength.

[0045] like Figure 1As shown, the thickness T1 of the first wavelength conversion unit 120 is greater than the thickness T2 of the second wavelength conversion unit 150. In one embodiment, the thickness T1 is, for example, 1.1 to 3 times the thickness T2, and may be larger or smaller. In terms of specific dimensions, the thickness T1 is, for example, between 0.15 millimeters (mm) and 0.3 mm, and the thickness T2 is, for example, between 0.1 mm and 0.25 mm. Since the first wavelength conversion unit 120 has a certain thickness, the path length of the first light B1' reflected back and forth between the first light splitting unit 130 and the reflection unit 170 can be increased to increase the probability or efficiency of converting the first light B1' into the first converted light G1.

[0046] The first light splitting unit 130 is, for example, a dichroic mirror. Figure 1 As shown, the first light B1 and the second light B2 are blocked by the first light splitting unit 130 and cannot penetrate the first light splitting unit 130. The first light splitting unit 130 can reflect the first light B1 and the second light B2 having the first wavelength back to the first wavelength conversion unit 120 and the second wavelength conversion unit 150, respectively, and allow the first converted light G1 having the second wavelength and the second converted light G2 having the third wavelength to penetrate.

[0047] For example, Figure 1 As shown, since the first light splitter unit 130 allows the first wavelength to be reflected, the first light B1 with the first wavelength (not converted by the first wavelength conversion unit 120) is reflected by the first light splitter unit 130 back to the first wavelength conversion unit 120 (referred to as the first light B1'), so as to increase the probability or efficiency of the first light B1' being converted into the first converted light G1. The reflected first light B1' is incident on the reflection unit 170 and then reflected back to the first wavelength conversion unit 120, so as to increase the probability or efficiency of the first light B1' being converted into the first converted light G1. In addition, the first light source 110 and the first wavelength conversion unit 120 are disposed between the reflection unit 170 and the first light splitter unit 130, so that the first light B1' can be reflected back and forth between the first light splitter unit 130 and the reflection unit 170, so as to increase the probability or efficiency of the first light B1' being converted into the first converted light G1.

[0048] like Figure 1 As shown, the second light B2 with the first wavelength is reflected by the first beam splitter unit 130 back to the second wavelength conversion unit 150 (referred to as the second light B2”). The second light B2” penetrates the second wavelength conversion unit 150 and is incident on the second beam splitter unit 160, and is reflected from the second beam splitter unit 160 out of the light source module 100 or is processed by the light source module 100 separately. The light amount of the second light B2” accounts for less than a preset proportion of the light amount of the second light B2, so the light loss caused by the second light B2 is very small. The aforementioned preset proportion is, for example, equal to or less than 5%.

[0049] The second light splitting unit 160 is, for example, a dichroic light splitter. Figure 1 As shown, the configuration angle of the second light splitting unit 160 (e.g., relative to the optical axis direction of the second light B2, or relative to the optical axis direction of the converted light) is, for example, 45 degrees, but the embodiments of the present invention are not limited thereto. In addition, the first light source 110, the first wavelength conversion unit 120, the first light splitting unit 130, the second light source 140, the second wavelength conversion unit 150 and the reflection unit 170 are located on the same side of the second light splitting unit 160, so the second light B2, the first converted light G1 and the second converted light G2 can be incident on the same surface of the second light splitting unit 160.

[0050] Please refer to Figure 2 As shown, Figure 2 Schematic diagram of a light source module 200 according to another embodiment of the present invention. The light source module 200 includes a first light source 110, a first wavelength conversion unit 120, a first light splitting unit 130, a second light source 140, a second wavelength conversion unit 150, a second light splitting unit 160, a reflection unit 170, a third light source 210, a fourth light source 220, and a third light splitting unit 260. The light source module 200 according to the embodiment of the present invention has technical features similar to or the same as those of the aforementioned light source module 100, except that the light source module 200 further includes a third light source 210 and a fourth light source 220. The third light source 210 and the fourth light source 220 are, for example, light emitting diodes or laser light sources. The third light splitting unit 260 is, for example, a dichroic beam splitter.

[0051] The third light source 210 is arranged relative to the second light splitting unit 160 to emit a third light B3 having a first wavelength. The second light splitting unit 160 is used to allow light having a first wavelength (e.g., the second light B2 and the third light B3) to be reflected and allow light having a second wavelength (e.g., the first converted light G1 and the second converted light G2) to be transmitted. After the third light B3 is reflected from the second light splitting unit 160, it transmits through the third light splitting unit 260 and then enters the module 10. In this way, the first converted light G1, the second converted light G2, and the third light B3 of different light colors are transmitted through the second light splitting unit 160 and enter the module 10, so that the light source module 200 provides more color-changing light.

[0052] like Figure 2 As shown, the fourth light source 220 is used to emit a fourth light R1 having a third wavelength, wherein the third wavelength, the second wavelength and the first wavelength are different. In this embodiment, the first wavelength is, for example, one of red light, blue light and green light, the second wavelength is, for example, the other of red light, blue light and green light, and the third wavelength is, for example, the other of red light, blue light and green light. The first wavelength, the second wavelength and the third wavelength of the embodiment of the present invention are respectively described by taking blue light, green light and red light as examples.

[0053] The third light splitting unit 260 is arranged relative to the second light splitting unit 160 and is used to allow light with a first wavelength (e.g., the third light B3) to pass through, light with a second wavelength (e.g., the first converted light G1 and the second converted light G2) to pass through, and light with a third wavelength (e.g., the fourth light R1) to reflect. The fourth light R1 is reflected from the third light splitting unit 260 and then incident on the module 10. In this way, the first converted light G1, the second converted light G2, the third light B3, and the fourth light R1 of different light colors pass through the third light splitting unit 260 and are incident on the module 10, so that the light source module 200 provides more color-changing light.

[0054] like Figure 2 As shown, the third light source 210 and the second light source 140 are respectively located at two opposite sides of the second light splitting unit 160 , so that the third light B3 emitted by the third light source 210 and the second light B2 emitted by the second light source 140 are respectively reflected in two opposite directions to the module 10 and the second wavelength conversion unit 150 .

[0055] like Figure 2 As shown, the third beam splitter unit 260 and the second wavelength conversion unit 150 are respectively located on opposite sides of the second beam splitter unit 160, so that the first converted light G1, the second converted light G2 and the third light B3 transmitted through the second beam splitter unit 160 can be incident on the third beam splitter unit 260 along a straight optical path, that is, there is no need to configure an optical component for changing the direction of the light between the third beam splitter unit 260 and the second beam splitter unit 160.

[0056] Please refer to Figure 3 As shown, Figure 2 FIG. 3 is a schematic diagram of a light source module 300 according to another embodiment of the present invention. The light source module 300 includes a first light source 110, a first wavelength conversion unit 120, a first beam splitter unit 130, a second light source 140, a second wavelength conversion unit 150, a second beam splitter unit 360, and a reflection unit 170. The light source module 300 according to the embodiment of the present invention has technical features similar to or the same as those of the aforementioned light source module 100, except that the beam splitting characteristics of the second beam splitter unit 360 of the light source module 300 are different from those of the second beam splitter unit 160. The second beam splitter unit 360 is, for example, a dichroic beam splitter.

[0057] In this embodiment, the second light splitting unit 360 allows the light with the first wavelength (eg, the second light B2 ) to pass through, and allows the light with the second wavelength (eg, the first converted light G1 and the second converted light G2 ) to be reflected.

[0058] like Figure 3As shown, in the optical path of the first light B1 and the first converted light G1, the first light B1 is emitted from the first light source 110 and converted into the first converted light G1 by the first wavelength conversion unit 120; the first converted light G1 passes through the first light splitting unit 130, the second wavelength conversion unit 150 and the second light splitting unit 360 in sequence, and is reflected by the second light splitting unit 160 to the module 10.

[0059] like Figure 3 As shown, in the optical path of the second light B2 and the second converted light G2, the second light B2 is emitted from the second light source 140, and is incident on the second wavelength conversion unit 150 after passing through the second light splitting unit 360, and is converted into the second converted light G2 by the second wavelength conversion unit 150; the second converted light G2 passes through the first light splitting unit 130, the first wavelength conversion unit 120, the first light source 110, the reflection unit 170, the first wavelength conversion unit 120, the first light splitting unit 130, the second wavelength conversion unit 150 and the second light splitting unit 360 in sequence, and is reflected by the second light splitting unit 360 to the module 10.

[0060] like Figure 3 As shown, the first wavelength conversion unit 120 and the second light source 140 are respectively located on opposite sides of the second light splitting unit 360, so the second light B2 emitted by the second light source 140 and the converted light (first converted light G1 and second converted light G2) converted by the wavelength conversion unit are respectively incident on opposite sides of the second light splitting unit 360.

[0061] Please refer to Figure 4 As shown, Figure 4 Schematic diagram of a light source module 400 according to another embodiment of the present invention. The light source module 400 includes a first light source 110, a first wavelength conversion unit 120, a first light splitting unit 130, a second light source 140, a second wavelength conversion unit 150, a second light splitting unit 360, a reflection unit 170, a third light source 210, a fourth light source 220, and a third light splitting unit 260. The light source module 400 according to the embodiment of the present invention has technical features similar to or the same as those of the aforementioned light source module 300, except that the light source module 400 further includes a third light source 210, a fourth light source 220, and a third light splitting unit 260.

[0062] like Figure 4As shown, the third light source 210 is arranged relative to the second light splitting unit 160 to emit a third light B3 having a first wavelength. The second light splitting unit 360 allows light having a first wavelength (e.g., the second light B2 and the third light B3) to pass through and allows light having a second wavelength (e.g., the first converted light G1 and the second converted light G2) to be reflected. The third light B3 emitted from the third light source 210 sequentially passes through the second light splitting unit 160 and the third light splitting unit 260 and then enters the module 10. In this way, the first converted light G1, the second converted light G2, and the third light B3 of different light colors can pass through the second light splitting unit 360 and enter the module 10, so that the light source module 400 provides more color-changing light.

[0063] like Figure 4 As shown, the fourth light source 220 is used to emit a fourth light R1 having a third wavelength, wherein the third wavelength, the second wavelength and the first wavelength are different. In this embodiment, the first wavelength is, for example, one of red light, blue light and green light, the second wavelength is, for example, the other of red light, blue light and green light, and the third wavelength is, for example, the other of red light, blue light and green light. The first wavelength, the second wavelength and the third wavelength of the embodiment of the present invention are respectively described by taking blue light, green light and red light as examples.

[0064] like Figure 4 As shown, the third light splitting unit 260 is arranged relative to the second light splitting unit 360 and is used to allow light with a first wavelength (e.g., the third light B3) to pass through, light with a second wavelength (e.g., the first converted light G1 and the second converted light G2) to pass through, and light with a third wavelength (e.g., the fourth light R1) to reflect. After the fourth light R1 is reflected from the third light splitting unit 260, it is incident on the module 10. In this way, the first converted light G1, the second converted light G2, the third light B3, and the fourth light R1 of different light colors pass through the third light splitting unit 260 and are incident on the module 10, so that the light source module 400 provides more color-changing light.

[0065] like Figure 4 As shown, the second light source 140 and the second wavelength conversion unit 150 are respectively located on opposite sides of the second light splitting unit 360 , so that the second light splitting unit 360 is located on the optical path of the second light B2 emitted by the second light source 140 and the second converted light G2 converted by the second wavelength conversion unit 150 .

[0066] like Figure 4 As shown, the third light source 210 and the second light source 140 are located at the same side of the second light splitting unit 360 , and the third light B3 emitted by the third light source 210 and the second light B2 emitted by the second light source 140 are incident on the same surface of the second light splitting unit 360 .

[0067] Please refer to Figure 5 As shown, Figure 5Schematic diagram of a light source module 500 according to another embodiment of the present invention. The light source module 500 includes a first light source 110, a first wavelength conversion unit 120, a first light splitting unit 130, a second light source 140, a second wavelength conversion unit 150, a second light splitting unit 160, a reflection unit 170, and a third light source 510. The light source module 500 according to the embodiment of the present invention has technical features similar to or the same as those of the aforementioned light source module 100, except that the light source module 500 further includes a third light source 510.

[0068] The third light source 510 is disposed relative to the second light splitting unit 160 and emits a third light L3. The third light L3 has a wavelength different from the second wavelength, such as the first wavelength or the third wavelength. The second light splitting unit 160 is used to reflect the third light L3 and allow light with the second wavelength (such as the first converted light G1 and the second converted light G2) to pass through. In this way, the first converted light G1, the second converted light G2, and the third light L3 of different light colors are incident on the module 10 through the second light splitting unit 160, so that the light source module 500 provides more color-changing light.

[0069] Please refer to Figure 6 As shown, Figure 6 FIG. 6 is a schematic diagram of a light source module 600 according to another embodiment of the present invention. The light source module 600 includes a first light source 110, a first wavelength conversion unit 120, a first light splitting unit 130, a second light source 140, a second wavelength conversion unit 150, a second light splitting unit 360, a reflection unit 170, and a third light source 610. The light source module 600 according to the embodiment of the present invention has technical features similar to or the same as those of the aforementioned light source module 300, except that the light source module 600 further includes a third light source 610.

[0070] The third light source 610 is disposed relative to the second light splitting unit 260 and emits a third light L3. The third light L3 has a wavelength different from the second wavelength, such as the first wavelength or the third wavelength. The second light splitting unit 360 allows the third light L3 to pass through and allows the light with the second wavelength (such as the first converted light G1 and the second converted light G2) to be reflected. In this way, the first converted light G1, the second converted light G2, and the third light L3 of different light colors are incident on the module 10 through the second light splitting unit 360, so that the light source module 600 provides more color-changing light.

[0071] In summary, an embodiment of the present invention proposes an optical film group, and the light source module includes a first light source, a first wavelength conversion unit, a second spectroscopic unit, a second light source, a second wavelength conversion unit and a first spectroscopic unit. The first light source is used to emit a first light having a first wavelength. The first wavelength conversion unit is arranged relative to the first light source, and is used to convert at least part of the first light into a first converted light having a second wavelength, and the second wavelength is different from the first wavelength. The second spectroscopic unit is arranged relative to the first wavelength conversion unit, and is used to allow one of the first wavelength and the second wavelength to penetrate, and the other to reflect. The second light source is arranged relative to the second spectroscopic unit, and is used to emit a second light having a first wavelength. The second wavelength conversion unit is arranged relative to the second spectroscopic unit, and is used to convert at least part of the second light into a second converted light having a second wavelength. The first spectroscopic unit is arranged between the first wavelength conversion unit and the second wavelength conversion unit, and is used to reflect the first wavelength and allow the second wavelength to penetrate. The optical film group can be applied to any device that requires light. The optical film group includes two light sources, two wavelength conversion units and two spectroscopic units. The two light beams emitted by the two light sources are respectively converted into two converted lights with the same wavelength by the two wavelength conversion units, and are emitted through one of the light splitting units. The other light splitting unit is located between the two wavelength conversion units and can reflect the light emitted by one of the light sources back to one of the wavelength conversion units to increase the conversion efficiency.

[0072] Although the present invention is described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplify the preferred embodiments of the present invention and should not be construed as limiting the present invention. In order to clearly describe the required components, the proportions in the schematic drawings do not represent the proportional relationship of the actual components.

[0073] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A light source module, characterized in that: Include: A first light source, configured to emit a first light having a first wavelength, the first light source having a light emitting surface and a back surface opposite to each other, the first light being emitted from the light emitting surface; A first wavelength conversion unit is disposed relative to the first light source and is used to convert at least a portion of the first light into a first converted light having a second wavelength, the second wavelength being different from the first wavelength; A second light splitting unit is disposed opposite to the first wavelength conversion unit and is used to allow one of the first wavelength and the second wavelength to pass through and the other to reflect; A second light source is disposed opposite to the second light splitting unit and is used to emit a second light having the first wavelength; A second wavelength conversion unit is disposed opposite to the second light splitting unit and is used to convert at least a portion of the second light into a second converted light having the second wavelength; A first light splitting unit is disposed between the first wavelength conversion unit and the second wavelength conversion unit and is used to reflect the first wavelength and allow the second wavelength to pass through; as well as The reflection unit is disposed on the back surface and is used for reflecting the first light and the second converted light.

2. The light source module according to claim 1, wherein: The first light splitting unit is used for reflecting the first light and the second light having the first wavelength back to the first wavelength conversion unit and the second wavelength conversion unit respectively, and the first light splitting unit allows the first converted light having the second wavelength to pass through.

3. The light source module according to claim 1, wherein: Also includes: a third light source disposed opposite to the second light splitting unit and emitting a third light having a wavelength different from the second wavelength; The second light splitting unit is used for reflecting the third light and allowing the first converted light and the second converted light having the second wavelength to pass through.

4. The light source module according to claim 1, wherein: Also includes: A third light source is disposed opposite to the second light splitting unit and emits a third light having the first wavelength; The second light splitting unit is used to allow the second light and the third light with the first wavelength to be reflected and the first converted light and the second converted light with the second wavelength to be transmitted.

5. The light source module according to claim 4, characterized in that: The third light source and the second light source are respectively located at two opposite sides of the second light splitting unit.

6. The light source module according to claim 1, wherein: Also includes: A third light source is disposed opposite to the second light splitting unit and emits a third light having the first wavelength; The second light splitting unit is used to allow the second light and the third light having the first wavelength to penetrate and the first converted light and the second converted light having the second wavelength to reflect.

7. The light source module according to claim 6, wherein: The third light source and the second light source are located on the same side of the second light splitting unit.

8. The light source module according to claim 1, wherein: Also includes: a fourth light source for emitting fourth light having a third wavelength, wherein the third wavelength, the second wavelength and the first wavelength are different; as well as The third light splitting unit is arranged opposite to the second light splitting unit and is used for allowing the third light with the first wavelength to penetrate, the first converted light and the second converted light with the second wavelength to penetrate, and the fourth light with the third wavelength to reflect.

9. The light source module according to claim 8, wherein: The third light splitting unit and the second wavelength conversion unit are respectively located at two opposite sides of the second light splitting unit.

10. The light source module according to claim 8, wherein: The second light source and the second wavelength conversion unit are respectively located at two opposite sides of the second light splitting unit.

11. The light source module according to claim 1, wherein: The first light source and the first wavelength conversion unit are disposed between the reflection unit and the first light splitting unit.

12. The light source module according to claim 1, wherein: The first light source has a light-emitting surface and a back surface opposite to each other, and the first light is emitted from the light-emitting surface. The light source module further includes: The reflection unit is disposed on the back surface and is used for reflecting the first light and the second converted light.

13. The light source module according to claim 1, wherein: The thickness of the first wavelength conversion unit is greater than the thickness of the second wavelength conversion unit.

14. The light source module according to claim 1, wherein: The first light source, the first wavelength conversion unit, the first light splitting unit, the second wavelength conversion unit and the second light splitting unit are arranged in sequence from the first light source to the second light splitting unit.

15. The light source module according to claim 1, wherein: The first wavelength conversion unit, the first light splitting unit and the second wavelength conversion unit are adjacent to each other.

16. The light source module according to claim 1, wherein: The first light source and the first wavelength conversion unit are in contact with each other.

17. The light source module according to claim 1, wherein: The first light source and the second light source are respectively located at two opposite sides of the first light splitting unit.

18. The light source module according to claim 1, wherein: The first wavelength conversion unit has a first surface and a third surface opposite to each other, the second wavelength conversion unit has a second surface and a fourth surface opposite to each other, the third surface and the fourth surface are respectively located on two opposite sides of the first light splitting unit, the first light is incident on the first surface, and the second light is incident on the second surface.

19. The light source module according to claim 1, wherein: The second light, the first converted light and the second converted light are incident on the same surface of the second light splitting unit.

20. The light source module according to claim 1, wherein: The second light and the first converted light are incident on two opposite surfaces of the second light splitting unit respectively.

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