Laser light source structure

Abstract

A laser light source structure, comprising a packaging light source unit, a first lens unit and a second lens unit. The packaging light source unit comprises: a circuit substrate; a first laser light source arranged on the circuit substrate and configured to emit first light in a first direction; and a second laser light source arranged on the circuit substrate, spaced apart from the first laser light source and packaged on the circuit substrate together with the first laser light source, and configured to emit second light in the first direction. The first lens unit is arranged on a light path of the first laser light source, and the second lens unit is arranged on a light path of the second laser light source. The first light is incident to the first lens unit and is reflected to a second direction, the first light is transmitted through the second lens unit in the second direction, the second light is incident to the second lens unit and is reflected to the second direction, and the second light and the first light are combined in the second direction to form mixed-color light.

Description

Laser light source structure TECHNICAL FIELD

[0001] The present invention relates to a light source structure, and more particularly to a laser light source structure. BACKGROUND

[0002] Laser light is used as a light source of a projector, and has the advantage of super wide color gamut. However, in the trade-off between brightness and overall size, the current laser projectors have the disadvantage of large size. Therefore, the current laser light source system developed for high brightness requirement has a relatively large size and cannot be applied to general projectors.

[0003] Since the size of the laser light source system limits the brightness, how to provide a laser light source design with small size and high brightness is one of the current breakthrough directions.

[0004] SUMMARY

[0005] The present invention can provide a laser light source structure with small size and high brightness.

[0006] In one embodiment, the present invention provides a laser light source structure, comprising a package light source unit, a first lens unit and a second lens unit. The package light source unit comprises: a circuit substrate; a first laser light source disposed on the circuit substrate and emitting a first light along a first direction; and a second laser light source disposed on the circuit substrate and spaced apart from the first laser light source and commonly packaged on the circuit substrate, and emitting a second light along the first direction. A first lens unit is disposed on the light path of the first laser light source; a second lens unit is disposed on the light path of the second laser light source. Wherein the first light is incident on the first lens unit and reflected to a second direction, and the first light transmits the second lens unit along the second direction, the second direction is perpendicular to the first direction, the second light is incident on the second lens unit and reflected to the second direction, and the second light and the first light are combined into a mixed light in the second direction.

[0007] In some embodiments, the first light and the second light are substantially coaxial in the second direction.

[0008] In some embodiments, the first light and the second light are complementary colors of light.

[0009] In some embodiments, the first lens unit and the second lens unit are parallel to each other in the second direction.

[0010] In some embodiments, the first lens unit and the second lens unit partially overlap as viewed from the second direction.

[0011] In some embodiments, the laser light source structure further comprises a third lens unit disposed on the light path of the mixed color light and disposed in a V shape. The mixed color light is incident on the third lens unit in the second direction and is reflected to the first direction, and is reflected to the second direction by the third lens unit.

[0012] In some embodiments, the laser light source structure further comprises a fourth lens unit disposed on the light path of the mixed color light. After being reflected by the third lens unit, the mixed color light is incident on the fourth lens unit in the second direction and is reflected to a third direction.

[0013] In some embodiments, the first laser light source and the second laser light source are spaced apart by a first distance, the mixed color light has two light spots, and the light spots at least partially overlap or overlap each other.

[0014] In some embodiments, the optical axis of the first light in the second direction and the optical axis of the second light in the second direction are spaced apart by a second distance, and the second distance is smaller than the first distance.

[0015] In some embodiments, the first lens unit and the second lens unit are spaced apart by the first distance in the second direction.

[0016] In one embodiment, the present application provides a laser light source structure, comprising a first packaged light source unit, a second packaged light source unit, a first lens unit and a second lens unit. The first packaged light source unit comprises: a first circuit substrate; a first laser light source disposed on the first circuit substrate and emitting a first light along a first direction; and a second laser light source disposed on the first circuit substrate and spaced apart from the first laser light source and packaged together on the first circuit substrate, and emitting a second light along the first direction, the first light and the second light being parallel. The second packaged light source unit is disposed orthogonally to the first packaged light source unit and comprises: a second circuit substrate disposed orthogonally to the first circuit substrate; a third laser light source disposed on the second circuit substrate and emitting a third light along a second direction, the second direction being perpendicular to the first direction; and a fourth laser light source disposed on the second circuit substrate and spaced apart from the third laser light source and packaged together on the second circuit substrate, and emitting a fourth light along the second direction, the third light and the fourth light being parallel. The first lens unit is disposed on a light path of the first laser light source and a light path of the third laser light source. The second lens unit is disposed on a light path of the second laser light source and a light path of the fourth laser light source. The first light is incident to the first lens unit and reflected to the second direction, the third light is transmitted through the first lens unit along the second direction and merged with the first light as a first mixed color light, the second light is incident to the second lens unit and reflected to the second direction, the fourth light is transmitted through the second lens unit along the second direction and merged with the second light as a second mixed color light, the first mixed color light and the second mixed color light being parallel.

[0017] In some embodiments, the first light and the third light are substantially coaxial in the second direction, and the second light and the fourth light are substantially coaxial in the second direction.

[0018] In some embodiments, the first light and the third light are complementary colors of each other, and the second light and the fourth light are complementary colors of each other.

[0019] In some embodiments, the first lens unit and the second lens unit are both disposed at a preset angle relative to the first circuit substrate or the second circuit substrate.

[0020] In some embodiments, a surface of the first lens unit and a surface of the second lens unit are coplanar.

[0021] In some embodiments, the first lens unit and the second lens unit do not overlap as viewed from the second direction.

[0022] In some embodiments, the laser light source structure further comprises a third lens unit disposed on the light path of the first mixed color light and the light path of the second mixed color light. The first mixed color light and the second mixed color light are incident to the third lens unit along the second direction and are reflected to a third direction.

[0023] In some embodiments, the laser light source structure further comprises a fourth lens unit disposed on the light path of the first mixed color light and the light path of the second mixed color light, and disposed in a V shape. The mixed color light is incident to the third lens unit along the third direction and is reflected to the second direction, and is reflected to the third direction by the fourth lens unit.

[0024] In some embodiments, the first laser light source and the second laser light source are spaced apart by a first distance, and the third laser light source and the fourth laser light source are spaced apart by the first distance.

[0025] In some embodiments, the first mixed color light and the second mixed color light are spaced apart by the first distance in the second direction.

[0026] In summary, the packaging light source unit of the laser light source structure of an embodiment of the present application has at least two laser light sources disposed at intervals, and lens units corresponding to the light paths of the laser light sources are respectively provided, one of which is a reflector and the other is a dichroic mirror, and the lens units can guide the light emitted by the laser light sources to be coaxial. Therefore, the laser light source structure of an embodiment of the present application can combine the light emitted by the multiple laser light sources packaged together by the lens units into mixed color light of a single spot, thereby reducing the area of the spot and increasing the number of packaging light source units in the same volume, and further increasing the brightness of the laser light source structure.

[0027] In addition, the laser light source structure of another embodiment of the present application has at least two packaging light source units disposed orthogonally, and each packaging light source unit also has at least two laser light sources disposed at intervals. Furthermore, corresponding to the laser light sources of the packaging light source units, two laser light sources of different packaging light source units form a group, lens units corresponding to the light paths of the laser light sources are respectively provided, the lens units are dichroic mirrors, and the lens units can guide the light emitted by the corresponding laser light sources of different packaging light source units to be coaxial. Therefore, the laser light source structure of another embodiment of the present application can combine the light emitted by the corresponding laser light sources of different packaging light source units by the lens units into mixed color light of a single spot, thereby reducing the area of the spot and increasing the number of packaging light source units in the same volume, and further increasing the brightness of the laser light source structure. BRIEF DESCRIPTION OF DRAWINGS

[0028] Fig. 1 is a schematic view of a laser light source structure of a first embodiment of the present application;

[0029] Fig. 2 is a schematic view of a laser light source structure of a conventional example;

[0030] Fig. 3 is a schematic view of a laser light source structure of a second embodiment of the present application;

[0031] Fig. 4A is a sectional view of the laser light source structure along the A-A line of Fig. 3;

[0032] Fig. 4B is a sectional view of the laser light source structure along the B-B line of Fig. 3;

[0033] Fig. 5 is a schematic view of a laser light source structure of a third embodiment of the present application;

[0034] Fig. 6 is a schematic view of a laser light source structure of a fourth embodiment of the present application;

[0035] Fig. 7A is a sectional view of the laser light source structure along the A-A line of Fig. 6;

[0036] Fig. 7B is a sectional view of the laser light source structure along the B-B line of Fig. 6.

[0037] Reference Signs 1, 2, 3, 4, 9: Laser light source structure 11, 21, 31A, 31B, 41A, 41B: Package light source unit 111, 211, 311A, 311B, 411A, 411B: Circuit substrate 112, 113, 212, 213, 312A, 312B, 313A, 313B, 412A, 413A, 412B, 413B: Laser light source 12, 13, 22, 23, 24, 25, 32, 33, 42, 43, 44, 45: Lens unit 26, 93: Condenser lens 91: Light source unit 92: Reflective mirror D1, D2, D3: Direction G1: Distance L1, L2, L3, L11, L12, L1A, L1B, L2A, L2B: Light DETAILED DESCRIPTION

[0038] As used herein, such as the terms "first", "second", and so on, describe various elements, components, regions, layers, and / or portions, which should not be limited by these terms. These terms can be used merely to distinguish one element, component, region, layer, or portion from another. Unless the context clearly indicates otherwise, as used herein, the terms such as "first", "second", and so on are not intended to imply a sequence or an order, but to distinguish one element, component, region, layer, or portion from another.

[0039] Figure 1 is a schematic diagram of a laser light source structure 1 according to a first embodiment of the present application. The laser light source structure 1 can be used in a multi-color laser light source projector, such as an RGB laser light source projector. The laser light source has a good wavelength monochromaticity and other features, and thus can achieve perfect color reproduction. Meanwhile, the laser light source has super-high brightness and a long service life, and reduces the maintenance cost in the later stage. As shown in Figure 1, the laser light source structure 1 according to the first embodiment includes a packaged light source unit 11, a first lens unit 12, and a second lens unit 13.

[0040] The packaged light source unit 11 includes a circuit substrate 111, a first laser light source 112, and a second laser light source 113. The first laser light source 112 is disposed on the circuit substrate 111 and emits first light L1 in a first direction D1. In some embodiments, the first laser light source 112 can include a plurality of laser diode chips (not shown in the figure). The laser diode chips can emit light of the same color or light of different colors, which is not limited herein. In the present embodiment, the laser diode chips of the first laser light source 112 emit light of the same color, such as red light, which is used as an example for illustration, but is not used to limit the present application.

[0041] The second laser light source 113 is disposed on the circuit substrate 111 and is spaced apart from the first laser light source 112 and is commonly packaged on the circuit substrate 111. That is, the first laser light source 112 and the second laser light source 113 are commonly packaged on the circuit substrate 111 to form a single packaged laser light source unit. In some embodiments, the first laser light source 112 and the second laser light source 113 are spaced apart by a first distance G1. Here, the first distance G1 is defined as the distance between the center point of the first laser light source 112 and the center point of the second laser light source 113. The first distance G1 is not limited, but the main requirement is that the first laser light source 112 and the second laser light source 113 are not connected to each other and the light does not interfere with each other. That is, the first distance G1 is greater than zero. However, in order to reduce the overall volume of the laser light source structure 1, the first distance G1 is also not suitable to be greater than a certain requirement.

[0042] The second laser light source 113 emits second light L2 in the first direction Dl, and the first light LI and the second light L2 are parallel. The second laser light source 113 can include a plurality of laser diode chips (not shown in the figure), for example. The laser diode chips can emit light of the same color, or light of different colors to mix the color tone, which is not limited herein. In the embodiment, the laser diode chips of the second laser light source 113 emit light of different colors, such as blue light and green light, for example, which is not used to limit the present application. In other words, in the embodiment, the second laser light source 113 can emit cyan light. It is worth mentioning that the first light LI and the second light L2 are complementary colors. That is, the first light LI emitted by the first laser light source 112 and the second light L2 emitted by the second laser light source 113 will form white light after mixing. It should be noted that the light emitted by the first laser light source 112 and the second laser light source 113 is not limited to red light and cyan light, and different complementary colors can be used according to different designs. Furthermore, the colors of the first laser light source 112 and the second laser light source 113 can also be exchanged.

[0043] The first lens unit 12 is disposed on the light path of the first laser light source 112. That is, the first lens unit 12 is disposed on the light path of the first light LI emitted by the first laser light source 112. The first lens unit 12 is a reflector, for example. The first light LI emitted by the first laser light source 112 is reflected by the first lens unit 12 to the second direction D2 after being incident on the first lens unit 12. The second direction D2 is perpendicular to the first direction Dl. It should be noted that in FIG. 1, the first light LI is reflected to the lower side of the second direction D2, which is not limited, and according to different design methods, the first light LI can also be reflected to the upper side of the second direction D2.

[0044] The second lens unit 13 is disposed on the light path of the second laser light source 113. That is, the second lens unit 13 is disposed on the light path of the second light L2 emitted by the second laser light source 113. Meanwhile, the second lens unit 13 is also located on the light path of the first light LI reflected to the second direction D2. In some embodiments, the first lens unit 12 and the second lens unit 13 are parallel to each other in the second direction D2. The first lens unit 12 and the second lens unit 13 are disposed at the same angle of inclination with respect to the direction of incidence of the light rays. Furthermore, the first lens unit 12 and the second lens unit 13 partially overlap when viewed from the second direction D2 (for example, when viewed from above in Figure 1 to below). In addition, in some embodiments, the first lens unit 12 and the second lens unit 13 are spaced apart from each other by a first distance G1 in the second direction D2. Here, the first distance G1 is defined as the distance between the center point of the first lens unit 12 and the center point of the second lens unit 13. Thus, the first laser light source 112 and the second laser light source 113, which are spaced apart by the first distance G1, can cause the first light LI and the second light L2 to be incident on the first lens unit 12 and the second lens unit 13 in parallel. The second lens unit 13 is, for example, a dichroic mirror. The second lens unit 13 can transmit light of a certain wavelength and reflect light of a certain wavelength. In the present embodiment, the first light LI is transmitted and the second light L2 is reflected.

[0045] Thus, after the first light LI emitted by the first laser light source 112 is reflected by the first lens unit 12 from the first direction D1 to the second direction D2, the first light LI is transmitted through the second lens unit 13 along the second direction D2. Meanwhile, the second light L2 emitted by the second laser light source 113 is incident on the second lens unit 13 from the first direction D1 and is reflected by the second lens unit 13 to the second direction D2. It is worth mentioning that the first light LI and the second light L2 are substantially coaxial in the second direction D2. Alternatively, if the optical axis of the first light LI in the second direction D2 and the optical axis of the second light L2 in the second direction D2 are spaced apart by a second distance G2, the second distance G2 is smaller than the first distance G1. In other words, the first light LI and the second light L2 share a light path in the second direction D2. Thus, the second light (blue light) L2 and the first light (red light) LI are combined into a single light spot of mixed color light L3 (i.e., white light) in the second direction D2.

[0046] As mentioned above, the package light source unit 11 of the laser light source structure 1 of the present embodiment has at least two laser light sources 112, 113 arranged in a spaced manner, and a lens unit 12, 13 is arranged corresponding to the light path of each laser light source 112, 113, wherein one lens unit 12 is a mirror, for example, and the other lens unit 13 is a dichroic mirror, for example, and the lens units 12, 13 can guide the light rays L1, L2 emitted by the laser light sources 112, 113 to be coaxial. Therefore, the laser light source structure 1 of the present embodiment can combine the light rays L1, L2 emitted by the multiple laser light sources 112, 113 packaged together into a single spot of mixed color light L3 through the lens units 12, 13.

[0047] FIG. 2 is a schematic diagram of a conventional laser light source structure 9. As shown in FIG. 2, the conventional laser light source structure 9 has only one mirror 92 arranged corresponding to each light source unit 91, and the different color light rays L11, L12 emitted by each light source unit 91 form two spots on the condenser lens 93 after being reflected by the mirror 92 to generate mixed color light. Therefore, the mixed color light generated by the light source unit 91 of the conventional laser light source structure 9 needs the area of two spots, and if one of the two spots cannot be presented, the problem of color deviation will occur. In other words, when the conventional laser light source structure 9 is used as the light source of a projector, one light source unit 91 of the laser light source structure 9 must consider the area of two spots, so that the number of light source units 91 of the laser light source structure 9 will be limited in a limited volume, thereby reducing the overall brightness of the laser light source structure 9.

[0048] On the other hand, as shown in FIG. 1, the laser light source structure 1 of the present embodiment combines the light rays L1, L2 emitted by the multiple laser light sources 112, 113 packaged together into a single spot of mixed color light L3 through the lens units 12, 13, so that the original two spots at least partially overlap or even overlap with each other, that is, the area of the spot will be reduced, the number of package light source units 11 can be increased in the same volume, and thereby the brightness of the laser light source structure 1 can be increased.

[0049] It should be noted that the present embodiment takes two laser light sources cooperating with two lens units as an example for illustration, which is not limited. For example, if the package light source unit has more than three laser light sources, more than three lens units can be arranged to cooperate to form a single spot of mixed color light.

[0050] FIG. 3 is a schematic diagram of a laser light source structure 2 according to a second embodiment of the present application. FIG. 4A is a cross-sectional view of the laser light source structure 2 along the A-A line of FIG. 3. FIG. 4B is a cross-sectional view of the laser light source structure 2 along the B-B line of FIG. 3. As shown in FIGS. 1, 3, 4A and 4B, the laser light source structure 2 according to the second embodiment differs from the laser light source structure 1 according to the first embodiment in that the laser light source structure 2 includes a plurality of packaged light source units 21, and the first lens unit 22 and the second lens unit 23 are arranged in a strip shape corresponding to the plurality of packaged light source units 21. It is worth mentioning that in the present embodiment, the packaged light source units 21 are arranged on both sides (e.g., the left and right sides of FIG. 3) as an example for illustration, but this is not limiting. For example, the plurality of packaged light source units 21 can also be arranged on the top side, the bottom side and / or the inner side (e.g., the top side, the bottom side and / or the inner side of FIG. 3), or other different arrangements.

[0051] In addition, as shown in FIGS. 3, 4A and 4B, in some embodiments, the laser light source structure 2 can further include a third lens unit 24 and a fourth lens unit 25. The third lens unit 24 is arranged on the light path of the mixed light L3 and is arranged in a V shape. It is noted that corresponding to the packaged light source units 21 on one side, the third lens unit 24 is arranged in a V shape. In the present embodiment, since the packaged light source units 21 are arranged on both sides, two third lens units 24 are arranged in a W shape. After the mixed light L3 is emitted from the second lens unit 23, it is incident on the third lens unit 24 along the second direction D2, and the mixed light L3 is reflected by the third lens unit 24 toward the first direction D1 and then reflected by the third lens unit 24 toward the second direction D2. That is, as shown in FIG. 4A, the mixed light L3 is incident on the third lens unit 24 along the second direction D2 downward, is first reflected along the first direction D1 to the right, and then is reflected along the second direction D2 upward.

[0052] The fourth lens unit 25 is also arranged on the light path of the mixed light L3. After the mixed light L3 is reflected by the third lens unit 24, it is incident on the fourth lens unit 25 along the second direction D2, and the mixed light L3 is then reflected by the fourth lens unit 25 toward the third direction D3 to be emitted toward the condenser lens 26. The third direction D3 is perpendicular to the first direction D1 and the second direction D2. That is, as shown in FIG. 4B, the mixed light L3 is incident on the fourth lens unit 25 along the second direction D2 upward, and is then reflected by the fourth lens unit 25 along the third direction D3 to the right to be emitted toward the condenser lens 26. It is noted that corresponding to the packaged light source units 21 at different positions, the fourth lens unit 25 can be arranged at different heights.

[0053] As mentioned above, the laser light source structure 2 of the present embodiment combines the light rays L1, L2 emitted by the plurality of laser light sources 212, 213 commonly packaged on the circuit substrate 211 into a single light spot of mixed color light L3 through the lens units 22, 23, so that the area of the light spot is reduced, and thus the packaged light source unit 21 can be closely arranged. Therefore, the number of packaged light source units 21 in the same volume can be increased, and thus the brightness of the laser light source structure 2 can be increased.

[0054] It is noted that if the packaged light source unit is arranged on the upper side and / or the lower side, the third lens unit 24 and the fourth lens unit 25 can also not be arranged, since the mixed color light can be directly emitted toward the condenser direction. The third lens unit 24 and the fourth lens unit 25 are mainly used to guide the mixed color light to the condenser direction.

[0055] FIG. 5 is a schematic view of a laser light source structure 3 of a third embodiment of the present application. As shown in FIG. 1 and FIG. 5, the laser light source structure 3 of the third embodiment differs from the laser light source structure 1 of the first embodiment in that the laser light source structure 3 comprises a first packaged light source unit 31A and a second packaged light source unit 31B, and the second packaged light source unit 31B is arranged orthogonally to the first packaged light source unit 31A. In other words, a second circuit substrate 311B of the second packaged light source unit 31B is arranged orthogonally to a first circuit substrate 311A of the first packaged light source unit 31A. The first packaged light source unit 31A and the second packaged light source unit 31B can be completely identical packaged light source units, but this is not limited. Furthermore, the arrangement of a first lens unit 32 and a second lens unit 33 comprised by the laser light source structure 3 is different from the arrangement of the first lens unit 12 and the second lens unit 13 of the laser light source structure 1.

[0056] The first packaged light source unit 31A comprises the first circuit substrate 311A, a first laser light source 312A and a second laser light source 313A. Similarly, the first laser light source 312A and the second laser light source 313A are spaced apart by a distance (for example, the first distance G1 in FIG. 1). The first circuit substrate 311A, the first laser light source 312A and the second laser light source 313A are similar to the circuit substrate 111, the first laser light source 112 and the second laser light source 113, and will not be described here. The first laser light source 312A emits first light L1A along a first direction D1, and the second laser light source 113 emits second light L2A along the first direction D1, and the first light L1A and the second light L2A are parallel.

[0057] Similarly, the second packaged light source unit 31B includes a second circuit substrate 311B, a third laser light source 312B, and a fourth laser light source 313B. Similarly, the third laser light source 312B and the fourth laser light source 313B are spaced apart by a distance (e.g., the first distance G1 in FIG. 1). The second circuit substrate 311B, the third laser light source 312B, and the fourth laser light source 313B are similar to the circuit substrate 111, the first laser light source 112, and the second laser light source 113, and thus are not described again. The third laser light source 312B emits third light L1B along the second direction D2, and the fourth laser light source 313B emits fourth light L2B along the second direction D2. The third light L1B and the fourth light L2B are parallel.

[0058] It is worth mentioning that the first light L1A and the third light L1B are complementary colors of each other, and the second light L2A and the fourth light L2B are complementary colors of each other. For example, the first light L1A emitted by the first laser light source 312A and the third light L1B emitted by the third laser light source 312B are red light and cyan light, respectively, and the second light L2A emitted by the second laser light source 313A and the fourth light L2B emitted by the fourth laser light source 313B are cyan light and red light, respectively, but this is not limited. Different complementary colors can be used according to different designs. Furthermore, the colors of the first laser light source 312A and the second laser light source 313A can also be interchanged, and the colors of the third laser light source 312B and the fourth laser light source 313B must also be correspondingly interchanged.

[0059] The first lens unit 32 is disposed on the light path of the first laser light source 312A and the light path of the third laser light source 312B. The second lens unit 33 is disposed on the light path of the second laser light source 313A and the light path of the fourth laser light source 313B. The first lens unit 32 and the second lens unit 33 are, for example, dichroic mirrors. That is, the first lens unit 32 and the second lens unit 33 can transmit light of a certain wavelength and reflect light of a certain wavelength.

[0060] In some embodiments, the first lens unit 32 and the second lens unit 33 are both disposed at a preset angle relative to the first circuit substrate 311A or the second circuit substrate 311B. As shown in FIG. 5, for example, the first lens unit 32 is disposed at a preset angle (e.g., a required reflection angle relative to incident light) relative to the first laser light source 312A of the first circuit substrate 311A, and the second lens unit 33 is also disposed at a preset angle relative to the second laser light source 313A of the first circuit substrate 311A. In some embodiments, the surface of the first lens unit 32 and the surface of the second lens unit 33 are coplanar. That is, from the second direction D2 (e.g., observing from the top to the bottom in FIG. 5), the first lens unit 32 and the second lens unit 33 do not overlap.

[0061] Therefore, the first light L1A emitted by the first laser light source 312A is incident on the first lens unit 32 from the first direction D1 and is reflected toward the second direction D2, and the third light L1B emitted by the third laser light source 312B is transmitted through the first lens unit 32 along the second direction D2, and the third light L1B is combined with the first light L1A into mixed light (first mixed light) L3 in the second direction D2. It is worth mentioning that the first light L1A and the third light L1B are substantially coaxial in the second direction D2. Alternatively, if the optical axis of the first light L1A in the second direction D2 and the optical axis of the third light L1B in the second direction D2 are separated by a distance (for example, the second distance G2 in FIG. 1), the distance between the optical axes of the two light rays L1A, L1B will be less than the distance between the first laser light source 312A and the third laser light source 312B. In other words, the first light L1A and the third light L1B share the same optical path in the second direction D2. Thus, the third light (blue light) L1B and the first light (red light) L1A are combined into a single spot of mixed light L3 (i.e., white light) in the second direction D2, so that the original two spots at least partially overlap each other, that is, the area of the spot is reduced.

[0062] Similarly, the second light L2A emitted by the second laser light source 313A is incident on the second lens unit 33 from the first direction D1 and is reflected toward the second direction D2, and the fourth light L2B emitted by the fourth laser light source 313B is transmitted through the second lens unit 33 along the second direction D2, and the fourth light L2B is combined with the second light L2A into mixed light (second mixed light) L3 in the second direction D2, and the two mixed lights (first mixed light, second mixed light) L3 are parallel to each other. Similarly, the second light L2A and the fourth light L2B are substantially coaxial in the second direction D2. Alternatively, if the optical axis of the second light L2A in the second direction D2 and the optical axis of the fourth light L2B in the second direction D2 are separated by a distance (for example, the second distance G2 in FIG. 1), the distance between the optical axes of the two light rays L2A, L2B will be less than the distance between the second laser light source 313A and the fourth laser light source 313B. In other words, the second light L2A and the fourth light L2B share the same optical path in the second direction D2. Thus, the second light (blue light) L2A and the fourth light (red light) L2B are combined into a single spot of mixed light L3 (i.e., white light) in the second direction D2, so that the original two spots at least partially overlap each other, that is, the area of the spot is reduced.

[0063] It is worth mentioning that the two mixed lights (first mixed light, second mixed light) L3 generated by the first packaged light source unit 31A and the second packaged light source unit 31B are separated by a distance in the second direction. That is, the two mixed lights L3 are separated by the same distance as between the laser light sources, such as the first distance G1 in FIG. 1.

[0064] As mentioned above, the laser light source structure 3 of the present embodiment has at least two packaging light source units 31A, 31B arranged orthogonally, and each of the packaging light source units 31A, 31B has at least two laser light sources 312A, 313A, 312B, 313B arranged at intervals. Furthermore, the laser light sources 312A, 313A, 312B, 313B corresponding to the packaging light source units 31A, 31B are grouped into two laser light sources (e.g., the laser light sources 312A, 312B and the laser light sources 313A, 313B) of different packaging light source units 31A, 31B, and the light paths corresponding to the laser light sources 312A, 313A, 312B, 313B are respectively provided with lens units 32, 33, such as dichroic mirrors, which can guide the light rays L1A, L2A, L1B, L2B emitted by the corresponding laser light sources 312A, 313A, 312B, 313B of different packaging light source units 31A, 31B to be coaxial. In detail, when the first light L1A is a complementary color light to the third light L1B and the second light L2A, the transmission and reflection spectra of the first lens unit 32 and the second lens unit 23 are designed to be exactly opposite. Therefore, the laser light source structure 3 of the present embodiment can combine the light rays (e.g., the first light L1A and the third light L1B, and the second light L2A and the fourth light L2B) emitted by the corresponding laser light sources 312A, 313A, 312B, 313B of different packaging light source units 31A, 31B into a single spot of mixed color light L3 through the lens units 32, 33.

[0065] Similarly, the laser light source structure 1 of the present embodiment combines the light rays (e.g., the first light L1A and the third light L1B, and the second light L2A and the fourth light L2B) emitted by the laser light sources 312A, 313A, 312B, 313B into a single spot of mixed color light L3 through the lens units 32, 33, so that the area of the spot is reduced, the number of packaging light source units 31A, 31B can be increased under the same volume, and the brightness of the laser light source structure 1 can be increased.

[0066] FIG. 6 is a schematic diagram of a fourth embodiment of the laser light source structure 4 of the present application. FIG. 7A is a cross-sectional view of the laser light source structure 4 along the A-A line of FIG. 6. FIG. 7B is a cross-sectional view of the laser light source structure 4 along the B-B line of FIG. 6. As shown in FIGS. 5, 6, 7A, and 7B, the laser light source structure 4 of the fourth embodiment differs from the laser light source structure 3 of the third embodiment in that the laser light source structure 4 includes multiple groups of packaged light source units 41A, 41B. In this embodiment, the packaged light source units 41A, 41B are arranged on the upper and lower sides and on the left and right sides (as shown in FIG. 6), but this is not limiting. In addition, the first lens unit 42 and the second lens unit 43 are arranged corresponding to each group of packaged light source units 41A, 41B, and the first lens unit 42 and the second lens unit 43 can also be arranged in a long strip shape according to different designs.

[0067] In addition, as shown in FIGS. 6, 7A, and 7B, in some embodiments, the laser light source structure 4 can further include a third lens unit 44 and a fourth lens unit 45. The third lens unit 44 is arranged on the light path of the mixed color light L3 of each group of packaged light source units 41A, 41B. After the mixed color light L3 is emitted from the lens units 42, 43, it is incident on the third lens unit 44 in the second direction D2 downward or upward (as shown in FIG. 7A). The mixed color light L3 generated by the packaged light source units 41A, 41B located on the upper part is reflected by the third lens unit 44 to the third direction D3 to the right (as shown in FIG. 7B) to be emitted toward the condenser lens 46. On the other hand, the mixed color light L3 generated by the packaged light source units 41A, 41B located on the lower part is reflected by the third lens unit 44 to the third direction D3 to the left (as shown in FIG. 7B) to be incident on the fourth lens unit 45. It should be noted that multiple third lens units 44 located at different heights can be arranged corresponding to packaged light source units 41A, 41B located at different positions.

[0068] The fourth lens unit 45 is also arranged on the light path of the mixed color light L3 and is arranged in a V shape. A portion of the mixed color light L3 is reflected by the third lens unit 44 and is incident on the fourth lens unit 45 in the third direction D3. The mixed color light L3 is reflected by the fourth lens unit 45 downward in the second direction D2 (as shown in FIG. 7B) and is then reflected by the fourth lens unit 45 to the right in the third direction D3 (as shown in FIG. 7B) to be emitted toward the condenser lens 46.

[0069] As described above, the laser light source structure 4 of the present embodiment combines the light rays L1A, L2A, L1B, L2B emitted from the plurality of laser light sources 412A, 413A, 412B, 413B packaged in the circuit substrates 411A, 411B into a single light spot mixed color light L3 by the lens units 42, 43, 44, 45, whereby the area of the light spot is reduced, and the number of the packaged light source units 41A, 41B can be increased in the same volume, and the brightness of the laser light source structure 4 can be increased.

[0070] As described above, the laser light source structure of the present embodiment has at least two laser light sources arranged at intervals in the packaged light source unit, and the optical paths corresponding to the laser light sources are respectively provided with lens units, one of which is a mirror, and the other of which is a dichroic mirror, and the lens units can guide the light rays emitted from the laser light sources to be coaxial. Therefore, the laser light source structure of the present embodiment can combine the light rays emitted from the plurality of laser light sources packaged together into a single light spot mixed color light by the lens units, whereby the area of the light spot can be reduced, and the number of the packaged light source units can be increased in the same volume, and the brightness of the laser light source structure can be increased.

[0071] In addition, the laser light source structure of another embodiment of the present application has at least two packaged light source units arranged orthogonally, and each of the packaged light source units has at least two laser light sources arranged at intervals. Furthermore, the optical paths corresponding to the laser light sources of the packaged light source units are respectively provided with lens units, one of which is a dichroic mirror, and the other of which is a dichroic mirror, and the lens units can guide the light rays emitted from the corresponding laser light sources of different packaged light source units to be coaxial. Therefore, the laser light source structure of another embodiment of the present application can combine the light rays emitted from the corresponding laser light sources of different packaged light source units into a single light spot mixed color light by the lens units, whereby the area of the light spot can be reduced, and the number of the packaged light source units can be increased in the same volume, and the brightness of the laser light source structure can be increased.

[0072] The foregoing outlines some of the features of the embodiments of the present application so that those skilled in the art can better understand the present application. Those skilled in the art should appreciate that they can readily use the present application as a basis for designing or modifying other processes and structures for carrying out the same purposes and / or achieving the same benefits without departing from the spirit and scope of the present application. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present application and that they can make various changes, substitutions and alterations herein without departing from the spirit and scope of the present application. Hence, the scope of the present application is set forth with the following claims.

Claims

1. A laser light source structure, comprising: a package light source unit, comprising: a circuit substrate; a first laser light source disposed on the circuit substrate and emitting a first light along a first direction; and a second laser light source disposed on the circuit substrate and spaced apart from the first laser light source and collectively packaged on the circuit substrate, and emitting a second light along the first direction; a first lens unit disposed on a light path of the first laser light source; and a second lens unit disposed on a light path of the second laser light source, wherein the first light is incident to the first lens unit and reflected to a second direction, and the first light is transmitted through the second lens unit along the second direction, the second direction being perpendicular to the first direction, the second light is incident to the second lens unit and reflected to the second direction, and the second light is combined with the first light in the second direction into a mixed light.

2. The laser light source structure of claim 1, wherein the first light and the second light are substantially coaxial in the second direction.

3. The laser light source structure of claim 1, wherein the first light and the second light are complementary colors of light.

4. The laser light source structure of claim 1, wherein the first lens unit and the second lens unit are parallel to each other in the second direction.

5. The laser light source structure of claim 2, wherein the first lens unit and the second lens unit partially overlap each other as viewed from the second direction.

6. The laser light source structure of claim 1, further comprising: a third lens unit disposed on a light path of the mixed light and disposed in a V shape, wherein, the mixed light is incident to the third lens unit along the second direction and reflected to the first direction, and then reflected to the second direction by the third lens unit.

7. The laser light source structure of claim 6, further comprising: a fourth lens unit disposed on a light path of the mixed light, wherein the mixed light is incident to the fourth lens unit along the second direction and reflected to a third direction after being reflected by the third lens unit.

8. The laser light source structure of claim 1, wherein the first laser light source and the second laser light source are spaced apart by a first distance, the mixed light has two light spots, and the two light spots at least partially overlap each other or overlap each other.

9. The laser light source structure of claim 8, wherein an optical axis of the first light in the second direction and an optical axis of the second light in the second direction are spaced apart by a second distance, the second distance being smaller than the first distance.

10. The laser light source structure of claim 8, wherein the first lens unit and the second lens unit are spaced apart by the first distance in the second direction.

11. A laser light source structure, comprising: a first package light source unit, comprising: a first circuit substrate; a first laser light source disposed on the first circuit substrate and emitting a first light along a first direction; and a second laser light source disposed on the first circuit substrate and spaced apart from the first laser light source and collectively packaged on the first circuit substrate, and emitting a second light along the first direction; a second laser light source disposed on the first circuit substrate and spaced apart from the first laser light source and commonly packaged in the first circuit substrate, and emitting second light along the first direction, the first light and the second light being parallel; a second packaged light source unit disposed orthogonally to the first packaged light source unit and comprising: a second circuit substrate disposed orthogonally to the first circuit substrate; a third laser light source disposed on the second circuit substrate and emitting third light along a second direction, the second direction being perpendicular to the first direction; and a fourth laser light source disposed on the second circuit substrate and spaced apart from the third laser light source and commonly packaged in the second circuit substrate, and emitting fourth light along the second direction, the third light and the fourth light being parallel; a first lens unit disposed on a light path of the first laser light source and a light path of the third laser light source; and a second lens unit disposed on a light path of the second laser light source and a light path of the fourth laser light source, wherein the first light is incident to the first lens unit and reflected to the second direction, the third light is transmitted through the first lens unit along the second direction and combined with the first light as first mixed color light, the second light is incident to the second lens unit and reflected to the second direction, the fourth light is transmitted through the second lens unit along the second direction and combined with the second light as second mixed color light, the first mixed color light and the second mixed color light are parallel.

12. The laser light source structure of claim 11, wherein the first light and the third light are substantially coaxial in the second direction, and the second light and the fourth light are substantially coaxial in the second direction.

13. The laser light source structure of claim 11, wherein the first light and the third light are complementary color lights, and the second light and the fourth light are complementary color lights.

14. The laser light source structure of claim 11, wherein the first lens unit and the second lens unit are both disposed at a preset angle relative to the first circuit substrate or the second circuit substrate.

15. The laser light source structure of claim 14, wherein a surface of the first lens unit and a surface of the second lens unit are coplanar.

16. The laser light source structure of claim 11, wherein the first lens unit and the second lens unit do not overlap as viewed from the second direction.

17. The laser light source structure of claim 11, further comprising: a third lens unit disposed on a light path of the first mixed color light and a light path of the second mixed color light, wherein the first mixed color light and the second mixed color light are incident to the third lens unit along the second direction and reflected to a third direction.

18. The laser light source structure of claim 17, further comprising: a fourth lens unit disposed on the light paths of the first mixed color light and the second mixed color light and disposed in a V shape, wherein The mixed color light is incident to the third lens unit in the third direction and is reflected to the second direction, and is reflected to the third direction again by the fourth lens unit.

19. The laser source structure of claim 11, wherein the first laser source is spaced a first distance from the second laser source, and the third laser source is spaced the first distance from the fourth laser source.

20. The laser source structure of claim 19, wherein the first mixed color light and the second mixed color light are spaced the first distance in the second direction.

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