Laser light source device and projection system

Abstract

The utility model discloses a laser light source device and a projection system. The laser light source device at least comprises a first laser, a second laser, a third laser and a light combination assembly, the first laser comprises a plurality of first laser chips, and the second laser and the third laser each comprise a plurality of second laser chips and a plurality of third laser chips. The light combining assembly combines the laser emitted by the first laser and the laser emitted by the second laser. Therefore, light combination is performed on the at least three lasers, and the light emitting brightness of the laser light source device can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of projection, in particular to a laser light source device and a projection system. Background Art

[0002] Projection display is a technology that uses a flat image information to control the light source, and uses an optical system and projection space to magnify the image and display it on the projection surface. With the development of projection display technology, projection display has gradually been applied to business activities, conferences and exhibitions, scientific education, military command, traffic management, centralized monitoring, advertising and entertainment, and other fields. Its advantages such as large display screen size and clear display are also suitable for large-screen display requirements.

[0003] Compared with other light sources, laser light sources have the advantages of high color gamut and high brightness, making them more and more widely used in the projection field. The lasers currently used in mainstream applications have been upgraded from monochromatic lasers to tri-color lasers. However, although the power of tri-color lasers has been improved, they still cannot meet the brightness requirements in many application scenarios. Utility Model Content

[0004] In a first aspect of an embodiment of the present utility model, a laser light source device is provided, comprising at least:

[0005] A first laser, a second laser and a third laser; the first laser includes a plurality of first laser chips, and the second laser and the third laser each include a plurality of second laser chips and a plurality of third laser chips;

[0006] The light combining component is located at the light output side of the first laser, the second laser and the third laser, and is used to combine the lasers emitted by the first laser, the second laser and the third laser.

[0007] In some embodiments of the utility model, the third laser further comprises a plurality of first laser chips;

[0008] The first laser comprises a light emitting area, in which a plurality of first laser chips are arranged;

[0009] The second laser comprises a first light emitting area and a second light emitting area; a plurality of second laser chips are arranged in the first light emitting area of ​​the second laser, and a plurality of third laser chips are arranged in the second light emitting area of ​​the second laser;

[0010] The third laser comprises a first light emitting area and a second light emitting area; a plurality of first laser chips are arranged in the first light emitting area of ​​the third laser, and a plurality of second laser chips and a plurality of third laser chips are arranged in the second light emitting area of ​​the third laser;

[0011] The light combining component includes: a first component and a second component; the first component is used to combine the laser light emitted by the first laser with the laser light emitted by the second light emitting area of ​​the third laser; the second component is used to combine the laser light emitted by the first light emitting area of ​​the third laser with the laser light emitted by the second laser.

[0012] In some embodiments of the utility model, the light emitting directions of the second laser and the third laser are the same, the light emitting direction of the first laser and the light emitting direction of the third laser are perpendicular to each other, and the third laser is located between the first laser and the second laser;

[0013] The first component is used to receive the laser light emitted by the first laser and the laser light emitted by the second light emitting area of ​​the third laser, and combine the received laser light emitted by the first laser with the laser light emitted by the second light emitting area of ​​the third laser;

[0014] The second component includes: a first light combining component, a second light combining component and a third light combining component; the first light combining component is used to receive the laser light emitted from the first light emitting area of ​​the third laser and emit it to the second light combining component; the second light combining component is used to combine the laser light emitted from the first light emitting area of ​​the third laser and the laser light emitted from the second light emitting area of ​​the second laser, and emit them to the third light combining component; the third light combining component is used to combine the laser light emitted from the first light emitting area of ​​the third laser, the laser light emitted from the second light emitting area of ​​the second laser and the laser light emitted from the first light emitting area of ​​the second laser.

[0015] In some embodiments of the utility model, the laser light source device further comprises: a phase delay element, located at the light output side of the third laser; the phase delay element is used to delay the phase of the incident laser by π.

[0016] In some embodiments of the utility model, the first laser, the second laser and the third laser are divided into a first light emitting area and a second light emitting area; a plurality of laser chips are arranged in the first light emitting area and the second light emitting area;

[0017] A plurality of first laser chips are disposed in both the first light emitting area and the second light emitting area of ​​the first laser;

[0018] A plurality of second laser chips are arranged in the first light emitting area of ​​the second laser, and a plurality of third laser chips are arranged in the second light emitting area of ​​the second laser;

[0019] A plurality of second laser chips are arranged in the first light emitting area of ​​the third laser, and a plurality of third laser chips are arranged in the second light emitting area of ​​the second laser;

[0020] The light combining component includes: a first component and a second component; the first component is used to combine the laser light emitted from the first light emitting area of ​​the first laser with the laser light emitted from the second laser; the second component is used to combine the laser light emitted from the second light emitting area of ​​the first laser with the laser light emitted from the third laser.

[0021] In some embodiments of the utility model, the light emitting directions of the first laser, the second laser and the third laser are the same;

[0022] The first component includes: a first light combining component, a second light combining component and a third light combining component; the second component includes: a fourth light combining component, a fifth light combining component and a sixth light combining component; the light combining component also includes: a seventh light combining component and an eighth light combining component; the first component and the second component share the seventh light combining component and the eighth light combining component;

[0023] The first light combining component is used to receive the laser light emitted from the second light emitting area of ​​the second laser and emit it to the second light combining component; the second light combining component is used to combine the laser light emitted from the second light emitting area of ​​the second laser with the laser light emitted from the first light emitting area of ​​the second laser, and emit them to the seventh light combining component; the third light combining component is used to receive the laser light emitted from the first light emitting area of ​​the first laser and emit it to the eighth light combining component; the fourth light combining component is used to receive the laser light emitted from the second light emitting area of ​​the third laser and emit it to the fifth light combining component; the fifth The light combining component is used to combine the laser light emitted from the second light emitting area of ​​the third laser with the laser light emitted from the first light emitting area of ​​the third laser, and emit them to the seventh light combining component; the sixth light combining component is used to receive the laser light emitted from the second light emitting area of ​​the first laser and emit it to the eighth light combining component; the eighth light combining component is used to emit the laser light emitted from the first laser to the seventh light combining component; the seventh light combining component is used to combine the laser light emitted from the first laser with the laser light emitted from the second laser and the laser light emitted from the third laser.

[0024] In some embodiments of the utility model, the light emitting directions of the first laser and the third laser are the same, the first laser and the third laser are arranged side by side, and the second laser and the third laser are arranged opposite to each other;

[0025] The first component includes: a first light combining component and a second light combining component, the second component includes a third light combining component and a fourth light combining component; the light combining component also includes a fifth light combining component, and the first component and the second component share the fifth light combining component;

[0026] The first light combining component is used to receive the laser light emitted from the second light emitting area of ​​the second laser and emit it to the second light combining component; the second light combining component is used to combine the laser light emitted from the second light emitting area of ​​the second laser with the laser light emitted from the first light emitting area of ​​the second laser, and emit them to the fifth light combining component; the third light combining component is used to receive the laser light emitted from the second light emitting area of ​​the third laser and emit it to the fourth light combining component; the fourth light combining component is used to combine the laser light emitted from the second light emitting area of ​​the third laser with the laser light emitted from the first light emitting area of ​​the third laser, and emit them to the fifth light combining component; the fifth light combining component is used to combine the laser light emitted from the first laser with the laser light emitted from the second laser and the laser light emitted from the third laser.

[0027] In some embodiments of the utility model, the laser light source device further comprises: a phase delay element, the phase delay element being used to delay the phase of the incident laser by π;

[0028] The phase delay element includes a first phase delay element and a second phase delay element. The first phase delay element is located at the light-emitting side of one of the light-emitting regions of the first laser, and the second phase delay element is located at the light-emitting side of the third laser.

[0029] In some embodiments of the present invention, the first laser chip is a red laser chip, the second laser chip is a green laser chip, and the third laser chip is a blue laser chip; the red laser chip is used to emit red laser, the green laser chip is used to emit green laser, and the blue laser chip is used to emit blue laser.

[0030] A second aspect of the embodiments of the present utility model provides a projection system, comprising any one of the above-mentioned laser light source devices, an illumination system and a projection lens;

[0031] The illumination system comprises: a light homogenizing element and a light modulator located at the light emitting side of the laser light source device; and the projection lens is located at the light emitting side of the light modulator.

[0032] The laser light source device and projection system provided by the embodiment of the utility model at least include a first laser, a second laser, a third laser and a light combining component; the first laser includes a plurality of first laser chips, and the second laser and the third laser each include a plurality of second laser chips and a plurality of third laser chips. The light combining component combines the lasers emitted by the first laser and the second laser. Thus, combining at least three lasers can effectively improve the light output brightness of the laser light source device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model will be briefly introduced below. Obviously, the drawings introduced below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 One of the planar structural schematic diagrams of the laser provided in the embodiment of the utility model;

[0035] Figure 2 A schematic diagram of the structure of a light emitting device provided in an embodiment of the utility model;

[0036] Figure 3 The second schematic diagram of the planar structure of the laser provided in the embodiment of the utility model;

[0037] Figure 4 The third schematic diagram of the planar structure of the laser provided in the embodiment of the utility model;

[0038] Figure 5 One of the side structural schematic diagrams of the laser light source device provided in the embodiment of the utility model;

[0039] Figure 6 For passing Figure 5 Schematic diagram of the combined light spot after the combined light path is shown;

[0040] Figure 7 The second schematic diagram of the side structure of the laser light source device provided by the embodiment of the utility model;

[0041] Figure 8 for Figure 7 Schematic diagram of the principle of the central contraction component;

[0042] Fig. 9 The third schematic diagram of the side view structure of the laser light source device provided in the embodiment of the utility model;

[0043] Fig.10 The schematic diagram of the light combining spot is a light combining light path in which a beam reducing component is provided;

[0044] Fig.11 A fourth schematic diagram of the side structure of the laser light source device provided in an embodiment of the utility model;

[0045] Fig.12 One of the planar structural schematic diagrams of the first laser provided in an embodiment of the utility model;

[0046] Fig.13 One of the schematic diagrams of the planar structure of the second laser and the third laser provided in the embodiment of the utility model;

[0047] Fig.14 The second schematic diagram of the planar structure of the first laser provided in the embodiment of the utility model;

[0048] Fig.15 The second schematic diagram of the planar structure of the second laser and the third laser provided in the embodiment of the utility model;

[0049] Fig.16 A fifth side structural diagram of a laser light source device provided in an embodiment of the utility model;

[0050] Fig.17 For passing Fig.16 Schematic diagram of the combined light spot after the combined light path is shown;

[0051] Fig.18 A sixth side structural schematic diagram of the laser light source device provided in an embodiment of the utility model;

[0052] Fig.19 The seventh side structural diagram of the laser light source device provided in the embodiment of the utility model;

[0053] Fig. 20 For passing Fig.18 or Fig.19 Schematic diagram of the combined light spot after the combined light path is shown;

[0054] Fig.21 A schematic diagram of the structure of a projection system provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0055] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the utility model will be further described in conjunction with the drawings and examples below. However, the example embodiments can be implemented in various forms and should not be understood as being limited to the embodiments described herein; on the contrary, these embodiments are provided to make the utility model more comprehensive and complete, and to fully convey the concepts of the example embodiments to those skilled in the art. The same figure marks in the figures represent the same or similar structures, and their repeated descriptions will be omitted. The words expressing position and direction described in the utility model are all explained with the drawings as examples, but changes can be made as needed, and the changes made are all included in the scope of protection of the utility model. The drawings of the utility model are only used to illustrate the relative position relationship and do not represent the true proportion.

[0056] Projection display is a technology that uses a flat image information to control the light source, and uses an optical system and projection space to magnify the image and display it on the projection surface. With the development of projection display technology, projection display has gradually been applied to business activities, conferences and exhibitions, scientific education, military command, traffic management, centralized monitoring, advertising and entertainment, and other fields. Its advantages such as large display screen size and clear display are also suitable for large-screen display requirements.

[0057] Compared with other light sources, laser light sources have the advantages of high color gamut and high brightness, making them more and more widely used in the projection field. Figure 1 This is one of the planar structural schematic diagrams of the laser provided in the embodiment of the utility model.

[0058] like Figure 1 As shown, the laser includes a mounting substrate 1101 and a light emitting device 1102 located on the mounting substrate. The mounting substrate 1101 is provided with circuits and electrical connections; an insulating layer is located on the surface of the circuits and electrical connections, and the insulating layer has a plurality of openings, exposing the area to be connected to the light emitting device 1102 and the electrical connection to be connected to the external circuit.

[0059] In some embodiments, one or more light-emitting devices 1102 may be mounted on each mounting substrate 1101 , and the light-emitting devices 1102 on one mounting substrate 1101 may be controlled individually or electrically connected to each other so as to be controlled uniformly.

[0060] Figure 2 A schematic diagram of the structure of a light emitting device provided in an embodiment of the utility model.

[0061] like Figure 2 As shown, the light emitting device 1102 includes: a tube shell 11021, a laser chip x, a heat sink 11022, a wire 11023, a reflection part 11024, a cover plate 11025, a connection part 11026, a support plate 11027 and a lens part 11028.

[0062] The tube shell 11021 forms a accommodating space for encapsulating light-emitting elements. The laser chip x, the heat sink 11022, the wire 11023, and the reflective portion 11024 are all located in the tube shell 11021. The tube shell 11021 and the cover plate 11025 are sealed to form a sealed space for encapsulating light-emitting elements. The laser chip x and the heat sink 11022 are welded using a high-precision eutectic welding machine to form a laser chip assembly, also known as a Cos (Chip on submount, referred to as Cos) assembly. Each laser chip assembly corresponds to a reflective portion 11024, and each laser chip assembly corresponds to a lens portion 11028. The laser emitted by the laser chip assembly is incident on the corresponding reflective portion 11024 and is reflected by the reflective portion 11024 toward the opening direction of the tube shell 11021, so that the laser is incident on the corresponding lens portion 11028, and the lens portion 11028 collimates the laser. The laser chip components in the same tube shell 11021 can be electrically connected to each other through the wire 11023. The laser chip components at the edge are connected to the electrical connection part in the tube shell, so that the electrical connection part in the tube shell is connected to the electrical connection part at the bottom of the tube shell. By connecting the tube shell to the mounting substrate 1101, the mounting substrate 1101 is electrically connected to the laser chip inside the tube shell. The connecting part 11026 is used to fix the support plate 11027 and the cover plate 11025 to each other. The support plate 11027 serves as a supporting component of the lens part 11028.

[0063] Depend on Figure 2 It can be seen that a plurality of laser chips x can be disposed in each light emitting device 1102, and the plurality of laser chips x can be arranged in a row along the long side direction of the light emitting device 1102. When two or more light emitting devices 1102 are disposed on the mounting substrate 1101, the long sides of the light emitting devices 1102 are disposed adjacent to each other, and the laser chips in the laser can be arranged in multiple rows and columns.

[0064] In order to facilitate the reflection of the type of laser chip in the laser, the position of the laser chip indicated in the attached drawings of the embodiments of the present invention is actually the position of the lens portion 11028. Since the laser chip is located under the lens portion 11028, in order to reflect the overall structure of the laser and the type of laser chip contained therein, the lens positions indicated in the following attached drawings of the embodiments of the present invention are all for referring to the laser chip thereunder.

[0065] In some embodiments, Figure 1 As shown in FIG. 1 , the laser chip in the laser may include multiple types for emitting lasers of different wavelengths. Figure 1 For example, the laser may include a first laser chip x1, a second laser chip x2, and a third laser chip x3, wherein the wavelengths of lasers emitted by the first laser chip x1, the second laser chip x2, and the third laser chip x3 are different.

[0066] In some embodiments, Figure 1 As shown, the first laser chip x1 is arranged in a row, and the second laser chip x2 and the third laser chip x3 are arranged in a row. Optionally, the first laser chip x1 can be a red laser chip, the second laser chip x2 can be a green laser chip, and the third laser chip x3 can be a blue laser chip. The red laser chip can emit red laser, the green laser chip can emit green laser, and the blue laser chip can emit blue laser.

[0067] The laser used in the embodiment of the utility model can be a semiconductor laser. Since different laser chips use different materials, the luminous efficiency varies, resulting in uneven brightness of the three-color laser. Although various means are used to increase the power of the laser, the brightness changes greatly when adjusting the white balance, affecting the projection display effect.

[0068] In view of this, an embodiment of the present invention provides a laser light source device, Figure 3 The second schematic diagram of the planar structure of the laser provided in the embodiment of the utility model; Figure 4 The third schematic diagram of the planar structure of the laser provided in the embodiment of the utility model; Figure 5 This is one of the side structural schematic diagrams of the laser light source device provided in an embodiment of the utility model.

[0069] like Figure 3 , Figure 4 and Figure 5 As shown, the laser light source device at least includes: a first laser 111, a second laser 112 and a light combining component 12. The first laser 111 includes a plurality of first laser chips x1, and the second laser 112 includes a plurality of second laser chips x2 and a plurality of third laser chips x3.

[0070] The lasers used in laser light source devices are mostly semiconductor lasers. The lasers emitted by semiconductor lasers have a certain divergence angle, and the emitted lasers will form an elliptical pattern in the far field. Among them, the laser chip is composed of a plurality of stacked semiconductor layers. The major axis direction of the ellipse corresponds to the plane parallel to the stacking structure of the laser chip, and the minor axis direction of the ellipse corresponds to the stacking direction of the laser chip. The divergence angle of the laser emitted by the laser chip along the plane direction parallel to the stacking structure is greater than the divergence angle along the stacking direction. Therefore, the major axis direction of the ellipse can be called the fast axis direction of the laser, and the minor axis direction of the ellipse can be called the slow axis direction of the laser.

[0071] like Figure 3 and Figure 4The laser shown in the figure may include a first side parallel to the fast axis direction and a second side parallel to the slow axis direction. The first laser 111 and the second laser 112 may be arranged along a first direction x, and the first side of the laser is parallel to the first direction x, then the fast axis direction of the laser emitted by the laser is parallel to the first direction x. The second side of the laser is parallel to the second direction y, and the plane formed by the first direction x and the second direction y is the plane on which the laser is installed. The third direction z is the height direction of the laser, and is also the laser emission direction of the laser. Figure 5 As shown, the light combining component 12 is located at the light output side of the first laser 111 and the second laser 112 , and is used to combine the lasers emitted by the first laser 111 and the second laser 112 .

[0072] In the embodiment of the present utility model, Figure 3 and Figure 4 As shown, the first laser 111 includes a plurality of first laser chips x1, and the second laser 112 includes a plurality of second laser chips x2 and a plurality of third laser chips x3; the number of the first laser chips x1 is greater than the number of the second laser chips x2, and the number of the first laser chips x1 is greater than the number of the third laser chips x3.

[0073] By increasing the number of first laser chips x1, the brightness ratio of lasers emitted by the first laser chips x1 can be increased, so that the brightness of lasers of different colors is more balanced, and when adjusting the white balance, a large change in brightness can be avoided.

[0074] In some application scenarios, the red brightness of the three-color laser is low. In this case, in a specific implementation, the first laser chip x1 is a red laser chip, the second laser chip x2 is a green laser chip, and the third laser chip x3 is a blue laser chip; the red laser chip is used to emit red laser, the green laser chip is used to emit green laser, and the blue laser chip is used to emit blue laser. In this way, the brightness of the red laser is increased by increasing the number of red laser chips.

[0075] In some embodiments, Figure 3 and Figure 4 As shown, the first laser 111 and the second laser 112 each include two light emitting devices, each of which can be used as a light emitting area, so the first laser 111 and the second laser 112 each include two light emitting areas, which can be called the first light emitting area c1 and the second light emitting area c2. The first light emitting areas c1 and the second light emitting areas c2 of the first laser 111 and the second laser 112 are alternately arranged along the first direction x.

[0076] A plurality of first laser chips x1 are disposed in both the first light emitting area c1 and the second light emitting area c2 of the first laser 111; a plurality of second laser chips x2 are disposed in the first light emitting area c1 of the second laser 112; a plurality of third laser chips x3 are disposed in the second light emitting area c2 of the second laser 112.

[0077] like Figure 5 As shown, the light combining component 12 includes: a first light combining component 121, a second light combining component 122 and a third light combining component 123. The first light combining component 121 is located at the light emitting side of the second light emitting area c2 of the second laser 112, the second light combining component 122 is located at the light emitting side of the first light emitting area c1 of the second laser 112, and the third light combining component 123 is located at the light emitting side of the first laser 111. The first light combining component 121 receives the laser light emitted from the second light emitting area c2 of the second laser 112, and reflects the laser light emitted from the second light emitting area c2 of the second laser 112 received to the second light combining component 122; the second light combining component 122 transmits the laser light emitted from the second light emitting area c2 of the second laser 112 received, receives the laser light emitted from the first light emitting area c1 of the second laser 112, and reflects the laser light emitted from the first light emitting area c1 of the second laser 112 received, thereby the second laser 112 is transmitted to the second light combining component 122. The laser emitted from the first light emitting area c1 of the optical device is combined with the laser emitted from the second light emitting area c2, and emitted to the third light combining component 123; the third light combining component 123 receives the laser emitted by the second laser 112 after the combination, and transmits the laser emitted by the second laser 112, and at the same time receives the laser emitted by the first laser 111, and reflects the received laser emitted by the first laser 111, thereby achieving the combination of the laser emitted by the first laser 111 and the laser emitted by the second laser 112.

[0078] In some embodiments, the first light combining component 121 may use a reflective film or a reflective mirror to reflect light of the entire wavelength band; the second light combining component 122 and the third light combining component 123 may use a dichroic film or a dichroic mirror to combine lasers of different wavelengths. In some embodiments, the first laser chip x1 is a red laser chip, the second laser chip x2 is a green laser chip, and the third laser chip x3 is a blue laser chip, then the second light combining component 122 is used to reflect green laser light and transmit blue laser light, and the third light combining component 123 is used to reflect red laser light and transmit blue laser light and green laser light.

[0079] In some embodiments, Figure 3As shown, the first laser 111 may include two light-emitting devices, each of which includes four first laser chips x1, and the second laser 112 may include two light-emitting devices, each of which includes five laser chips, wherein the light-emitting device corresponding to the first light-emitting area c1 of the second laser 112 may include five second laser chips x2, and the light-emitting device corresponding to the second light-emitting area c2 of the second laser 112 may include five third laser chips x3. Thus, the ratio of the number of the first laser chips x1, the second laser chips x2, and the third laser chips x3 is 8:5:5, thereby increasing the number of the first laser chips x1, thereby improving the brightness of the laser emitted by the first laser chip x1.

[0080] In some embodiments, Figure 4 As shown, the first laser 111 may include two light-emitting devices, each of which includes five first laser chips x1, and the second laser 112 may include two light-emitting devices, each of which includes five laser chips, wherein the light-emitting device corresponding to the first light-emitting area c1 of the second laser 112 may include five second laser chips x2, and the light-emitting device corresponding to the second light-emitting area c2 of the second laser 112 may include five third laser chips x3. Thus, the ratio of the number of the first laser chip x1, the second laser chip x2, and the third laser chip x3 is 10:5:5, and the number of the first laser chip is twice the number of the second laser chip or the third laser chip. Thus, the brightness of the laser emitted by the first laser chip x1 is further improved.

[0081] The laser provided in the embodiment of the utility model adopts a modular packaging form. Each light-emitting device is packaged separately. Each light-emitting device can be installed on a mounting substrate as an independent module as required. The mounting substrate is then connected to an external circuit board. Therefore, it is easy to make individual improvements to the wiring inside the light-emitting device or the circuit board, and the versatility is stronger.

[0082] When the laser used in the embodiment of the utility model is connected to an external circuit, it can be welded to the circuit board through the pad at the bottom or plugged into the circuit board through the plug pins. It is not necessary to set rigid pins around the laser, which reduces the occupied area on the circuit board and is conducive to miniaturization design.

[0083] The first laser 111 provided in the embodiment of the utility model includes two light-emitting devices, each of which is provided with four or five first laser chips. The second laser 112 includes two light-emitting devices, each of which includes five second laser chips or five third laser chips. The number of light-emitting devices included in the above lasers and the number of laser chips provided in each light-emitting device are only for illustration.

[0084] Figure 6 For passing Figure 5 Schematic diagram of the combined light spot after the combined light path is shown.

[0085] In some embodiments, Figure 6 As shown, the first laser chip x1 can emit red laser, the second laser chip x2 can emit green laser, and the third laser chip x3 can emit blue laser. The divergence angles of lasers of different colors are different. The red laser has a larger divergence angle than the green laser and the blue laser. Therefore, as the optical path increases, the size of the red laser spot R will be larger. The size of the combined light spot restricts the size of the focusing lens in the subsequent optical path, and thus affects the size of the optical engine to a certain extent. Due to the physical distance between the two light-emitting devices in the first laser 111, according to Figure 5 After the three-color lasers are combined in the combined light path shown, the size of the red laser spot is relatively large, which is not conducive to the miniaturization of the optical engine.

[0086] In view of this, a beam reduction component 12s may be provided in the light combining assembly 12 to reduce the beam of the laser emitted by the first laser, thereby reducing the size of the light combining spot.

[0087] Figure 7 The second schematic diagram of the side structure of the laser light source device provided by the embodiment of the utility model; Figure 8 for Figure 7 Schematic diagram of the principle of the central contraction component; Fig. 9 This is a third schematic diagram of the side view structure of the laser light source device provided in an embodiment of the utility model.

[0088] like Figure 7 and Fig. 9 As shown, the light combining component 12 also includes: a beam reducing component 12s, which is located between the first laser 111 and the third light combining component 123. The beam reducing component 12s is used to transfer the laser emitted from the second light emitting area c2 of the first laser 111 to the direction of the first light emitting area c1 of the first laser 111, thereby making the laser spots emitted by the two light emitting devices of the first laser closer.

[0089] In some embodiments, Figure 7 and Figure 8 As shown, the focusing component 12s includes parallel plates, which include a first surface s1 and a second surface s2 that are oppositely and parallelly arranged, and a third surface s3 and a fourth surface s4 located on both sides of the first surface s1 and the second surface s2; a reflective layer is arranged on the third surface s3 and the fourth surface s4, and the reflective layer can reflect the incident light.

[0090] The first surface s1 is the light incident surface, the second surface s2 is the light emitting surface, and the parallel plate is arranged on the light emitting side of the second light emitting area c2 of the first laser 111. The laser emitted from the first light emitting area c1 of the first laser 111 is incident from the first surface s1 to the inside of the parallel plate. When the laser is incident on the third surface s3 of the parallel plate, it is reflected by the third surface s3 to the fourth surface s4, so that the laser propagates in the parallel plate. When the laser is incident on the fourth surface s4, the incident laser is reflected to the second surface s2, so as to be emitted outward from the second surface s2.

[0091] The first surface s1 and the second surface s2 are perpendicular to the incident laser, and the third surface s3 and the fourth surface s4 are arranged at an angle relative to the incident laser. The third surface s3 and the fourth surface s4 can be parallel to each other and arranged at an angle of 45 degrees relative to the incident laser, and the distance between the third surface s3 and the fourth surface s4 can be set according to the moving distance of the laser.

[0092] The cut angles produced during the processing of the parallel flat plates may cause light leakage. To avoid loss of efficiency, in some embodiments, Figure 8 As shown, the beam reduction component 12s may include a first light reflecting portion 12f1 and a second light reflecting portion 12f2, and the first light reflecting portion 12f1 and the second light reflecting portion 12f2 are arranged in parallel with each other and at a certain distance from each other. The first light reflecting portion 12f1 is used to receive the laser light emitted from the second light emitting area c2 of the first laser 111, and reflect the received laser light emitted from the second light emitting area c2 of the first laser 111 to the second light reflecting portion 12f2; the second light reflecting portion 12f2 then reflects the received laser light to the third light combining component 123. The laser light emitted from the first light emitting area c1 of the first laser 111 directly enters the third light combining component 123, so the laser light emitted from the second light emitting area c1 can be transferred to the direction of the first light emitting area c1 by setting two light reflecting portions, so that the light spots of the laser light emitted from the two light emitting areas are closer, which is conducive to reducing the size of the light combining spot.

[0093] The first reflective portion 12f1 and the second reflective portion 12f2 can be reflective films or reflective mirrors. By using the first reflective portion 12f1 and the second reflective portion 12f2 to compress the light spot of the laser emitted by the first laser, the uniformity of the projection picture of the whole machine can reach 93%.

[0094] Fig.10 Schematic diagram of the light combining spot with a beam reducing component set in the light combining optical path.

[0095] contrast Figure 6 and Fig.10By setting a beam reduction component 12s on the light output side of the first laser 111, the spot size of the three-color laser after light combination can be reduced by nearly 30%, thereby achieving the miniaturization of the optical engine while ensuring the uniformity and speckle of the entire screen.

[0096] Fig.11 This is a fourth side structural schematic diagram of the laser light source device provided in an embodiment of the utility model.

[0097] In some embodiments, Fig.11 As shown, the laser light source device also includes: a phase delay element (12z1 and 12z2), a focusing lens 13 and a diffusion element (141 and 142).

[0098] The phase delay element may include a first phase delay element 12z1 and a second phase delay element 12z2, wherein the first phase delay element 12z1 may be located at the light output side of the first laser 111 and the first light output area c1 or the second light output area c2; the second phase delay element 12z2 may be located on half of the output path of the second laser.

[0099] The lasers emitted by the laser are all polarized light, and the phase delay element can delay the phase of the incident laser by π, so that the polarization direction of the laser is rotated by 90 degrees, then the polarization direction of the laser that has not passed through the phase delay element 13 is perpendicular to the polarization direction of the laser that has passed through the phase delay element 13, thereby greatly reducing the coherence between the lasers, thereby reducing the contrast of the speckle. The phase delay element can be a half-wave plate or a liquid crystal wave plate, which is not limited here.

[0100] When a light-homogenizing element such as a light guide 21 is provided in the projection device, the outgoing laser needs to be focused so that more light can be incident on the light guide 21. Therefore, a focusing lens 13 needs to be provided in the light path. Fig.11 Taking only one convex lens as the focusing lens 13 as an example for illustration, in specific implementation, a lens group may also be provided as required to achieve the focusing effect, which is not limited here.

[0101] The diffusion element can be located at the light output side of the light combining component 12, and can further diffuse the incident laser light, thereby improving the uniformity of the combined light beam and improving the laser speckle. The diffusion element can be a diffusion sheet 141, a moving diffusion sheet 142, a diffusion wheel, etc., which are not limited here.

[0102] The combined laser beams pass through a diffuser to increase the transmission angle, reduce speckle and improve the uniformity of the image. The beams are then converged by a focusing lens into the light guide, where they are reflected multiple times. A speckle elimination device such as a vibrating diffuser or a diffuser wheel is added between the focusing lens and the light guide. The rapid rotation of the diffuser wheel increases the emission angles of the three wavelength lasers, and combined with the light guide, high-brightness, low-speckle and high-uniformity laser illumination is achieved.

[0103] The embodiment of the utility model increases the number of first laser chips by setting the first laser, thereby improving the brightness of the laser emitted by the first laser chip, which is beneficial to adjusting the white balance. However, the emission brightness of the laser light source device needs to be further improved.

[0104] Fig.12 One of the planar structural schematic diagrams of the first laser provided in an embodiment of the utility model; Fig.13 One of the schematic diagrams of the planar structure of the second laser and the third laser provided in the embodiment of the utility model; Fig.14 The second schematic diagram of the planar structure of the first laser provided in the embodiment of the utility model; Fig.15 The second schematic diagram of the planar structure of the second laser and the third laser provided in the embodiment of the utility model; Fig.16 This is a fifth side structural schematic diagram of the laser light source device provided in an embodiment of the utility model.

[0105] In some embodiments, Figure 12 to Figure 16 As shown, the laser light source device further includes a third laser 113 , and the third laser 113 may include a plurality of first laser chips x1 , a plurality of second laser chips x2 , and a plurality of third laser chips x3 .

[0106] like Fig.12 and Fig.14 As shown, the first laser 111 can be provided with a light emitting device, and the first laser 111 includes a light emitting area, in which a plurality of first laser chips x1 are provided. Fig.13 and Fig.15 As shown, the second laser 112 and the third laser 113 each include two light emitting devices, each of which can be used as a light emitting area, so the second laser 112 and the third laser 113 each include a first light emitting area c1 and a second light emitting area c2.

[0107] In some embodiments, Fig.15 and Fig.16As shown, the second laser 112 and the third laser 113 can be arranged side by side, and the first light emitting areas c1 and the second light emitting areas c2 of the second laser 112 and the third laser 113 are arranged alternately along the first direction x. A plurality of second laser chips x2 are arranged in the first light emitting area c1 of the second laser 112, and a plurality of third laser chips x3 are arranged in the second light emitting area c2 of the second laser 112. A plurality of first laser chips x1 are arranged in the first light emitting area c1 of the third laser 113, and a plurality of second laser chips x2 and a plurality of third laser chips x3 are arranged in the second light emitting area c1 of the third laser 113.

[0108] like Fig.16 As shown, the second laser 112 and the third laser 113 are located in the same plane, and the light emitting directions of the two are the same, and the first laser and the third laser 113 are arranged perpendicular to each other. The light combining component may include: a first component 12a and a second component 12b; the first component 12a includes a light combining component, and the second component 12b includes a first light combining component 121, a second light combining component 122 and a third light combining component 123. The first component 12a is located at the intersection of the emitted light of the second light emitting area c2 of the first laser 111 and the third laser 113, and the first component 12a is used to combine the laser emitted by the first laser 111 with the laser emitted by the second light emitting area c2 of the third laser 113. The first light combining element 121 receives the laser light emitted from the first light emitting area c1 of the third laser 113, and reflects the received laser light to the second light combining element 122; the second light combining element 122 transmits the laser light emitted from the first light emitting area c1 of the third laser 113, and receives the laser light emitted from the second light emitting area c2 of the second laser 112, and reflects the laser light emitted from the second light emitting area c2 of the second laser 112, thereby combining the laser light emitted from the first light emitting area c1 of the third laser 113 with the laser light emitted from the second light emitting area c2 of the second laser 112. The lasers emitted from the two light emitting areas c2 are combined and emitted to the third light combining component 123; the third light combining component 123 transmits the combined lasers of the first light emitting area c1 of the third laser 113 and the second light emitting area c2 of the second laser 112, and simultaneously receives the laser emitted from the first light emitting area c1 of the second laser 112, and reflects the laser emitted from the first light emitting area c1 of the second laser 112, thereby combining the laser emitted from the first light emitting area c1 of the third laser 113 with the laser emitted from the second laser 112.

[0109] In some embodiments, the first light combining component 121 may use a reflective film or a reflective mirror to reflect light of the entire wavelength band; the first component 12a, the second light combining component 122, and the third light combining component 123 may use a dichroic film or a dichroic mirror to combine lasers of different wavelengths. In some embodiments, the first laser chip x1 is a red laser chip, the second laser chip x2 is a green laser chip, and the third laser chip x3 is a blue laser chip, then the first component 12a is used to reflect green laser and blue laser, and transmit red laser; the second light combining component 122 is used to reflect blue laser and transmit red laser, and the third light combining component 123 is used to reflect green laser, and transmit blue laser and red laser.

[0110] In some embodiments, the first laser 111 in the laser light source device can be used as follows: Fig.12 The laser shown, the second laser 112 and the third laser 113 can be used as Fig.13 The laser shown. The first laser 111 includes a light-emitting device, in which four first laser chips x1 are arranged. The second laser 112 includes two light-emitting devices, each of which includes five laser chips, wherein the light-emitting device corresponding to the first light-emitting area c1 of the second laser 112 includes five second laser chips x2, and the light-emitting device corresponding to the second light-emitting area c2 of the second laser 112 may include five third laser chips x3. The third laser 113 includes two light-emitting devices, wherein the light-emitting device corresponding to the first light-emitting area c1 includes four first laser chips x1, and the light-emitting device corresponding to the second light-emitting area c2 includes three second laser chips x2 and two third laser chips x3. As a result, the ratio of the number of the first laser chip x1, the second laser chip x2 and the third laser chip x3 is 8:8:7, and the number of the second laser chip x2 and the third laser chip x3 is increased on the basis of the above embodiment, thereby improving the output brightness of the laser light source device.

[0111] In some embodiments, the first laser 111 in the laser light source device can be used as follows: Fig.14 The laser shown, the second laser 112 and the third laser 113 can be used as Fig.15The laser shown. The first laser 111 includes a light-emitting device, in which five first laser chips x1 are arranged. The second laser 112 includes two light-emitting devices, each of which includes five laser chips, wherein the light-emitting device corresponding to the first light-emitting area c1 of the second laser 112 includes five second laser chips x2, and the light-emitting device corresponding to the second light-emitting area c2 of the second laser 112 may include five third laser chips x3. The third laser 113 includes two light-emitting devices, wherein the light-emitting device corresponding to the first light-emitting area c1 includes five first laser chips x1, and the light-emitting device corresponding to the second light-emitting area c2 includes three second laser chips x2 and two third laser chips x3. Thus, the ratio of the number of the first laser chip x1, the second laser chip x2 and the third laser chip x3 is 10:8:7, thereby adding two first laser chips x1 on the basis of the above embodiment, thereby increasing the brightness of the laser light source device while increasing the brightness of the laser emitted by the first laser chip x1.

[0112] In some embodiments, Fig.16 As shown, the laser light source device also includes: a phase delay element 12z. As mentioned above, the phase delay element 12z can delay the phase of the incident laser by π, thereby rotating the polarization direction of the laser by 90 degrees. The polarization direction of the laser emitted by the first laser chip is perpendicular to the polarization directions of the laser emitted by the second laser chip and the third laser chip. A phase delay element is arranged on the light output side of the third laser 113, which can rotate the polarization direction of half or approximately half of the lasers of the same wavelength by 90 degrees, thereby reducing the coherence between lasers of the same wavelength, thereby reducing the contrast of the speckle. The phase delay element can be a half-wave plate or a liquid crystal wave plate, which is not limited here.

[0113] Fig.17 For passing Fig.16 Schematic diagram of the combined light spot after the combined light path is shown.

[0114] In some embodiments, the first laser chip x1 may emit red laser light, the second laser chip x2 may emit green laser light, and the third laser chip x3 may emit blue laser light. Fig.17 As shown, in the light spot after the first laser 111, the second laser 112 and the third laser 113 are combined by the light combining component, due to the asymmetric arrangement of the second laser chip x2 and the third laser chip x3 of the third laser 113, the arrangement of the green laser spot G and the blue laser spot B in the combined light spot is asymmetric, resulting in uneven color of the combined light spot.

[0115] In view of this, the embodiment of the utility model further provides a light combining optical path. Fig.18 The sixth side view structural diagram of the laser light source device provided in the embodiment of the utility model is as follows: Fig.19 This is the seventh side structural schematic diagram of the laser light source device provided in the embodiment of the utility model.

[0116] In some embodiments, the laser light source device further includes a third laser 113. The third laser 113 has the same structure as the second laser 112. For example, the first laser 111 and the second laser can both be Figure 4 The first laser and the second laser, the third laser and Figure 4 The structure of the second laser in is the same.

[0117] like Figure 4 As shown, the first laser 111 and the second laser 112 are each provided with two light-emitting devices, thereby being divided into a first light-emitting area c1 and a second light-emitting area c2, and each light-emitting device includes five laser chips. Among them, the light-emitting devices corresponding to the first light-emitting area c1 and the second light-emitting area c2 of the first laser 111 are each provided with five first laser chips x1; the light-emitting device corresponding to the first light-emitting area c1 of the second laser 112 is provided with five second laser chips x2, and the light-emitting device corresponding to the second light-emitting area c2 of the second laser 112 is provided with five third laser chips x3. Similarly, the third laser 113 may also include two light-emitting devices, and the light-emitting device corresponding to the first light-emitting area c1 of the third laser 113 is provided with five second laser chips x2, and the light-emitting device corresponding to the second light-emitting area c2 of the third laser 113 is provided with five third laser chips x3.

[0118] In some embodiments, Fig.18 As shown, the light emitting directions of the first laser 111, the second laser 112 and the third laser are the same. The second laser 112 and the third laser 113 can be arranged side by side, and the first laser 111 and the second laser 112 are arranged overlapping along the light emitting direction of the laser, that is, the third direction z. The light combining component includes: a first component and a second component; the first component includes a first light combining part 121, a second light combining part 122 and a third light combining part 123, and the second component includes a fourth light combining part 124, a fifth light combining part 125 and a sixth light combining part 126, and the first component and the second component share a seventh light combining part 127 and an eighth light combining part 128.

[0119] The first light combining element 121 receives the laser light emitted from the second light emitting area c2 of the second laser 112, and reflects the received laser light toward the second light combining element 122; the second light combining element 122 transmits the received laser light emitted from the second light emitting area c2 of the second laser 112, and simultaneously receives and reflects the laser light emitted from the first light emitting area c1 of the second laser 112, thereby combining the laser light emitted from the second laser 112 and emitting it toward the seventh light combining element 127. The third light combining element 123 receives the laser light emitted from the first light emitting area c1 of the first laser 111, and reflects the received laser light toward the eighth light combining element 128; the eighth light combining element 128 emits the received laser light emitted from the first light emitting area c1 of the first laser 111 toward the seventh light combining element 127, and the seventh light combining element 127 combines the laser light emitted from the first light emitting area c1 of the first laser 111 with the laser light emitted from the second laser 112.

[0120] The fourth light combining element 124 receives the laser light emitted from the second light emitting area c2 of the third laser 113, and reflects the received laser light to the fifth light combining element 125; the fifth light combining element 125 transmits the received laser light emitted from the second light emitting area c2 of the third laser 113, and simultaneously receives and reflects the laser light emitted from the first light emitting area c1 of the third laser 113, thereby combining the laser light emitted from the third laser 113 and emitting it to the seventh light combining element 127. The sixth light combining element 126 receives the laser light emitted from the second light emitting area c2 of the first laser 111, and reflects the received laser light to the eighth light combining element 128; the eighth light combining element 128 emits the received laser light emitted from the second light emitting area c2 of the first laser 111 to the seventh light combining element 127, and the seventh light combining element 127 combines the laser light emitted from the second light emitting area c2 of the first laser 111 with the laser light emitted from the third laser 113.

[0121] In order to avoid blocking between optical paths, the light combining components located on the light emitting sides of the second laser 112 and the third laser 113 are arranged at different heights in the third direction z, and the light combining components located on the light emitting sides of the first light emitting area and the second light emitting area of ​​the first laser are arranged at different heights in the third direction z. Among them, the first light combining component 121, the third light combining component 123, the fourth light combining component 124, the sixth light combining component 126 and the eighth light combining component 128 can adopt a reflective film or a reflective mirror to reflect light of the full band; the second light combining component 122, the fifth light combining component 125 and the seventh light combining component 127 can adopt a dichroic film or a dichroic mirror to combine lasers of different wavelengths. In some embodiments, the first laser chip x1 is a red laser chip, the second laser chip x2 is a green laser chip, the third laser chip x3 is a blue laser chip, the second light combining component 122 is used to reflect green laser and transmit blue laser, the fifth light combining component 125 is used to reflect green laser and transmit blue laser, and the seventh light combining component 127 is used to reflect red laser and transmit green laser and blue laser.

[0122] In some embodiments, the first laser 111 may also be staggered with the position of the second laser 112, so that the third light combining component 123, the sixth light combining component 126 and the eighth light combining component 128 are no longer required. The laser light emitted by the first laser 111 can be directly incident on the seventh light combining component to be combined with the laser light emitted by the second laser and the third laser.

[0123] According to different application scenarios, the setting direction and setting position of the laser can also be adjusted. The above embodiments are only used for illustration and do not limit the placement posture of the laser.

[0124] In some embodiments, Fig.19 As shown, the second laser 112 and the third laser 113 are arranged opposite to each other, the first laser 111 and the third laser 113 are arranged side by side, and the light emitting directions of the first laser 111 and the third laser 113 are the same. The light combining component includes: a first component and a second component; the first component includes a first light combining part 121 and a second light combining part 122, the second component includes a third light combining part 123 and a fourth light combining part 125, and the first component and the second component also share a fifth light combining part 125.

[0125] The first light combining component 121 receives the laser light emitted from the second light emitting area c2 of the second laser 112, and reflects the received laser light toward the second light combining component 122; the second light combining component 122 transmits and receives the laser light emitted from the second light emitting area c2 of the second laser 112, and simultaneously receives and reflects the laser light emitted from the first light emitting area c1 of the second laser 112, thereby combining the laser light emitted from the second laser 112 and emitting it toward the fifth light combining component 121.

[0126] The third light combining component 123 receives the laser emitted from the second light emitting area c2 of the third laser 113, and reflects the received laser to the fourth light combining component 124; the fourth light combining component 124 transmits and receives the laser emitted from the second light emitting area c2 of the third laser 113, and simultaneously receives and reflects the laser emitted from the first light emitting area c1 of the third laser 113, thereby combining the laser emitted by the third laser 113 and emitting it to the fifth light combining component 125.

[0127] The fifth light combining element 125 transmits and receives the laser beams emitted by the second laser 112 and the third laser 113 , and simultaneously receives and reflects the laser beam emitted by the first laser 111 , thereby combining the laser beams emitted by the first laser 111 , the second laser 112 , and the third laser 113 .

[0128] The first light combining element 121 and the third light combining element 123 may use a reflective film or a reflective mirror to reflect light of the entire wavelength band; the second light combining element 122, the fourth light combining element 124, and the fifth light combining element 125 may use a dichroic film or a dichroic mirror to combine lasers of different wavelengths. In some embodiments, the first laser chip x1 is a red laser chip, the second laser chip x2 is a green laser chip, and the third laser chip x3 is a blue laser chip. The second light combining element 122 and the fourth light combining element 124 are used to reflect green laser light and transmit blue laser light, and the fifth light combining element 125 is used to reflect red laser light and transmit green laser light and blue laser light.

[0129] Fig. 20 For passing Fig.18 or Fig.19 Schematic diagram of the combined light spot after the combined light path is shown.

[0130] When using Fig.18 or Fig.19 When the combined light path is shown, since the number of the second laser chip and the third laser chip in the second laser and the third laser are the same and arranged symmetrically, the color distribution of the combined light spot is more uniform. In some embodiments, the first laser chip x1 can emit red laser, the second laser chip x2 can emit green laser, and the third laser chip x3 can emit blue laser. Fig. 20 As shown, in the light spots after the first laser 111 and the second laser 112 are combined by the light combining component, the red laser spot R, the green laser spot G and the blue laser spot B are arranged symmetrically, and the combined light spots have uniform colors.

[0131] In some embodiments, Fig.18 and 19 As shown, the laser light source device also includes: a phase delay element, which is used to delay the phase of the incident laser by π, so that the polarization direction of the laser is rotated by 90 degrees. The phase delay element includes a first phase delay element 12z1 and a second phase delay element 12z2. The first phase delay element 12z1 is located on the light-emitting side of one of the light-emitting areas of the first laser 111, and the second phase delay element 12z2 is located on the light-emitting side of the third laser. The polarization direction of the laser emitted by the first laser chip is perpendicular to the polarization direction of the laser emitted by the second laser chip and the third laser chip. The phase delay element is arranged on the light-emitting side of the third laser 113, so that the polarization direction of half of the lasers of the same wavelength can be rotated by 90 degrees, thereby reducing the coherence between lasers of the same wavelength, thereby reducing the contrast of the speckle. The phase delay element can be a half-wave plate or a liquid crystal wave plate, which is not limited here.

[0132] The laser light source device provided by the embodiment of the utility model can achieve small volume and high uniformity while supporting the overall luminous flux requirement of 1000lm to 2000lm.

[0133] It should be noted that when the laser light source device includes three or more lasers, optical elements such as focusing lenses and diffusion elements can also be set on the light output side of the light combining component to further homogenize and focus the laser light beam after combining to meet the needs of the subsequent optical path.

[0134] Based on the same utility model concept, the embodiment of the utility model also provides a projection system, Fig.21 A schematic diagram of the structure of a projection system provided in an embodiment of the utility model.

[0135] like Fig.21 As shown, the projection system includes: a laser light source device 1, an illumination system 2 and a projection lens 3.

[0136] The laser light source device 1 can be any of the above laser light source devices. The illumination system 2 is located at the light output side of the laser light source device 1 and is used to shape and homogenize the laser light beam emitted by the laser light source device. The illumination system 2 includes: a light homogenization element 21, a shaping lens 22 and a light modulator 23.

[0137] The light homogenizing element 21 may be a light pipe or a fly-eye lens. The shaping lens 22 may adjust the shape and size of the laser spot incident on the light modulator 23 so that the laser beam is incident on the light modulator 23 at a suitable angle.

[0138] The light modulator 23 is used to modulate the incident light to form an image. In specific implementation, the light modulator can be a transmission light modulator or a reflection light modulator.

[0139] In some embodiments, the light modulator 23 may be a liquid crystal on silicon (LCoS) or a digital micromirror (DMD). LCoS is based on semiconductor technology, which is formed by bonding a complementary metal oxide semiconductor (CMOS) substrate to a glass substrate containing a transparent electrode, and then injecting liquid crystal packaging. LCoS has the characteristics of high aperture ratio and high resolution of each pixel, and can form a high-resolution image. DMD includes a large number of tiny reflectors, each of which can be driven to deflect individually. By controlling the deflection angle of the DMD, the brightness of the light incident on the projection lens is controlled.

[0140] After the light modulator 23 modulates the incident light to form an image, the light is reflected toward the projection lens 3, which forms an image, thereby projecting the image to a suitable size for viewing.

[0141] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0142] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A laser light source device, characterized in that: At least: A first laser, a second laser and a third laser; the first laser includes a plurality of first laser chips, and the second laser and the third laser each include a plurality of second laser chips and a plurality of third laser chips; The light combining component is located at the light output side of the first laser, the second laser and the third laser, and is used to combine the lasers emitted by the first laser, the second laser and the third laser.

2. The laser light source device according to claim 1, characterized in that: The third laser also includes a plurality of first laser chips; The first laser comprises a light emitting area, in which a plurality of first laser chips are arranged; The second laser comprises a first light emitting area and a second light emitting area; a plurality of second laser chips are arranged in the first light emitting area of ​​the second laser, and a plurality of third laser chips are arranged in the second light emitting area of ​​the second laser; The third laser comprises a first light emitting area and a second light emitting area; a plurality of first laser chips are arranged in the first light emitting area of ​​the third laser, and a plurality of second laser chips and a plurality of third laser chips are arranged in the second light emitting area of ​​the third laser; The light combining component includes: a first component and a second component; the first component is used to combine the laser light emitted by the first laser with the laser light emitted by the second light emitting area of ​​the third laser; the second component is used to combine the laser light emitted by the first light emitting area of ​​the third laser with the laser light emitted by the second laser.

3. The laser light source device according to claim 2, characterized in that: The light emitting directions of the second laser and the third laser are the same, the light emitting direction of the first laser and the light emitting direction of the third laser are perpendicular to each other, and the third laser is located between the first laser and the second laser; The first component is used to receive the laser light emitted by the first laser and the laser light emitted by the second light emitting area of ​​the third laser, and combine the received laser light emitted by the first laser with the laser light emitted by the second light emitting area of ​​the third laser; The second component includes: a first light combining component, a second light combining component and a third light combining component; the first light combining component is used to receive the laser light emitted from the first light emitting area of ​​the third laser and emit it to the second light combining component; the second light combining component is used to combine the laser light emitted from the first light emitting area of ​​the third laser and the laser light emitted from the second light emitting area of ​​the second laser, and emit them to the third light combining component; the third light combining component is used to combine the laser light emitted from the first light emitting area of ​​the third laser, the laser light emitted from the second light emitting area of ​​the second laser and the laser light emitted from the first light emitting area of ​​the second laser.

4. The laser light source device according to claim 3, characterized in that: The laser light source device further includes: a phase delay element located at the light output side of the third laser; the phase delay element is used to delay the phase of the incident laser by π.

5. The laser light source device according to claim 1, wherein: The first laser, the second laser and the third laser are all divided into a first light emitting area and a second light emitting area; a plurality of laser chips are arranged in the first light emitting area and the second light emitting area; A plurality of first laser chips are disposed in both the first light emitting area and the second light emitting area of ​​the first laser; A plurality of second laser chips are arranged in the first light emitting area of ​​the second laser, and a plurality of third laser chips are arranged in the second light emitting area of ​​the second laser; A plurality of second laser chips are arranged in the first light emitting area of ​​the third laser, and a plurality of third laser chips are arranged in the second light emitting area of ​​the second laser; The light combining component includes: a first component and a second component; the first component is used to combine the laser light emitted from the first light emitting area of ​​the first laser with the laser light emitted from the second laser; the second component is used to combine the laser light emitted from the second light emitting area of ​​the first laser with the laser light emitted from the third laser.

6. The laser light source device according to claim 5, characterized in that: The first laser, the second laser and the third laser have the same light emission direction; The first component includes: a first light combining component, a second light combining component and a third light combining component; the second component includes: a fourth light combining component, a fifth light combining component and a sixth light combining component; the light combining component also includes: a seventh light combining component and an eighth light combining component; the first component and the second component share the seventh light combining component and the eighth light combining component; The first light combining component is used to receive the laser light emitted from the second light emitting area of ​​the second laser and emit it to the second light combining component; the second light combining component is used to combine the laser light emitted from the second light emitting area of ​​the second laser with the laser light emitted from the first light emitting area of ​​the second laser, and emit them to the seventh light combining component; the third light combining component is used to receive the laser light emitted from the first light emitting area of ​​the first laser and emit it to the eighth light combining component; the fourth light combining component is used to receive the laser light emitted from the second light emitting area of ​​the third laser and emit it to the fifth light combining component; the fifth The light combining component is used to combine the laser light emitted from the second light emitting area of ​​the third laser with the laser light emitted from the first light emitting area of ​​the third laser, and emit them to the seventh light combining component; the sixth light combining component is used to receive the laser light emitted from the second light emitting area of ​​the first laser and emit it to the eighth light combining component; the eighth light combining component is used to emit the laser light emitted from the first laser to the seventh light combining component; the seventh light combining component is used to combine the laser light emitted from the first laser with the laser light emitted from the second laser and the laser light emitted from the third laser.

7. The laser light source device according to claim 5, characterized in that: The first laser and the third laser have the same light emitting direction, the first laser and the third laser are arranged side by side, and the second laser and the third laser are arranged opposite to each other; The first component includes: a first light combining component and a second light combining component, the second component includes a third light combining component and a fourth light combining component; the light combining component also includes a fifth light combining component, and the first component and the second component share the fifth light combining component; The first light combining component is used to receive the laser light emitted from the second light emitting area of ​​the second laser and emit it to the second light combining component; the second light combining component is used to combine the laser light emitted from the second light emitting area of ​​the second laser with the laser light emitted from the first light emitting area of ​​the second laser, and emit them to the fifth light combining component; the third light combining component is used to receive the laser light emitted from the second light emitting area of ​​the third laser and emit it to the fourth light combining component; the fourth light combining component is used to combine the laser light emitted from the second light emitting area of ​​the third laser with the laser light emitted from the first light emitting area of ​​the third laser, and emit them to the fifth light combining component; the fifth light combining component is used to combine the laser light emitted from the first laser with the laser light emitted from the second laser and the laser light emitted from the third laser.

8. The laser light source device according to claim 6 or 7, characterized in that: The laser light source device further comprises: a phase delay element, the phase delay element being used to delay the phase of the incident laser by π; The phase delay element includes a first phase delay element and a second phase delay element. The first phase delay element is located at the light-emitting side of one of the light-emitting regions of the first laser, and the second phase delay element is located at the light-emitting side of the third laser.

9. The laser light source device according to any one of claims 1 to 7, characterized in that: The first laser chip is a red laser chip, the second laser chip is a green laser chip, and the third laser chip is a blue laser chip; the red laser chip is used to emit red laser, the green laser chip is used to emit green laser, and the blue laser chip is used to emit blue laser.

10. A projection system, characterized in that: Comprising the laser light source device, the lighting system and the projection lens as claimed in any one of claims 1 to 9; The illumination system comprises: a light homogenizing element and a light modulator located at the light emitting side of the laser light source device; and the projection lens is located at the light emitting side of the light modulator.

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