A laser light source device and a projection system

Abstract

The application discloses a kind of laser light source device and projection system, comprising: laser and light combination component, laser includes the first laser chip, second laser chip and third laser chip of different wavelengths of outgoing laser, the laser chip of same color is arranged into laser chip group, and each laser chip is arranged into matrix;Light combination component is located at the light exit side of laser, for the laser beam of different colors that each laser chip group emits is combined to the same position after the turning of optical path, and then emits to the direction of setting back.The light combination component includes mirror and light combiner, the laser beam is turned by mirror to the turning of optical path, and the laser beam of different colors is combined by light combiner, finally the laser beam of each laser chip group is combined to the same position to emit, so that the position of different color laser spot is coincided, spot size is reduced, and different color laser light is more fully mixed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of projection display technology, and in particular to a laser light source device and a projection system. BACKGROUND

[0002] At present, the laser projection industry is developing very rapidly, and the laser, as one of the core components, plays an irreplaceable role. The semiconductor laser is packaged after the chip is produced.

[0003] The small laser (Multi Chip LD, referred to as MCL) is beneficial to the development of the small laser light source module due to its small space occupation, and is the development trend of the laser projection system. The MCL laser has the advantages of long service life, high brightness and high power, and the MCL laser can replace multiple BANK lasers. The chips of different colors can be packaged in the same MCL laser, so that the functions of multiple monochromatic lasers can be realized.

[0004] Due to the difference in the number and arrangement of the light-emitting chips of different colors, the sizes and positions of the light spots of different colors emitted by the laser are not the same. After the light beams of different colors are combined, the size of the light spot is large, and the mixing is not uniform, which affects the subsequent homogenization effect and display effect. SUMMARY

[0005] In a first aspect of the embodiments of the present application, a laser light source device is provided, comprising: a laser and a light combining assembly, the laser comprising a first laser chip, a second laser chip and a third laser chip, the first laser chip, the second laser chip and the third laser chip emitting laser beams of different wavelengths; the first laser chip, the second laser chip and the third laser chip are arranged into at least one laser chip group, and each laser chip is arranged in a matrix; the light combining assembly is located on the light emitting side of the laser, and is used for combining the laser beams of different colors emitted by each laser chip group after the light path is turned to the same position and then emitting to a set direction. The light combining assembly comprises a mirror and a light combining mirror. The laser beams are turned in the light path by the mirror, and the laser beams of different colors are combined by the light combining mirror. Finally, the laser beams emitted by each laser chip group are combined to the same position, so that the positions of the laser light spots of different colors are coincided, the size of the light spot is reduced, and the mixing of the laser light of different colors is more sufficient.

[0006] In a second aspect, the present application provides a projection system, comprising the laser light source device as described above, a diffusion sheet located at the light exit side of the laser light source device, a telescope imaging lens group located at the side of the diffusion sheet away from the laser light source device, a light uniformizing component located at the light exit path of the telescope imaging lens group, an illumination light path located at the side of the light uniformizing component away from the telescope imaging lens group, a light valve modulation component located at the light exit side of the illumination light path, and a projection lens located at the light exit side of the light valve modulation component. The laser light source device can make the spot positions of the combined laser beams of different colors substantially the same, thereby effectively reducing the spot size and making the light mixing more uniform. The laser spot size is more matched with the light entrance surface size of the light uniformizing component, which is conducive to improving the light uniformizing effect. The exit light of the laser light source device is first diffused by the diffusion sheet, then is incident on the light uniformizing component for further uniformization, the uniformized light beam is incident on the light valve modulation component, and finally is imaged by the projection lens. BRIEF DESCRIPTION OF DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings to be introduced below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0008] Figure 1 One of the optical path schematic diagrams of the laser light source device provided by the embodiments of the present application;

[0009] Figure 2 One of the plane structure schematic diagrams of the laser provided by the embodiments of the present application;

[0010] Figure 3 The second optical path schematic diagram of the laser light source device provided by the embodiments of the present application;

[0011] Figure 4 The third optical path schematic diagram of the laser light source device provided by the embodiments of the present application;

[0012] Figure 5 The second plane structure schematic diagram of the laser provided by the embodiments of the present application;

[0013] Figure 6 The fourth optical path schematic diagram of the laser light source device provided by the embodiments of the present application;

[0014] Figure 7 The structure schematic diagram of the projection system provided by the embodiments of the present application.

[0015] Wherein, 1-laser light source device, 2-diffuser, 3-telescopic imaging lens group, 4-homogenization component, 5-illumination light path, 6-light valve modulation component, 7-projection lens, 100-laser, 200-light combination assembly, 10-laser chip, 11-first laser chip, 12-second laser chip, 13-third laser chip, 31-first half-wave plate, 32-second half-wave plate, s-laser chip group, s1-first laser chip group, s2-second laser chip group, s3-third laser chip group, s4-fourth laser chip group, a1-first mirror, a2-second mirror, a3-third mirror, b1-first light combination mirror, b2-second light combination mirror, c-polarization light combination mirror. DETAILED DESCRIPTION

[0016] In order to make the above objectives, features and advantages of the present application more apparent, comprehensible and easier to understand, the present application will be further described below with reference to the accompanying drawings and examples. However, the example embodiments can be implemented in various forms, and should not be understood as being limited to the embodiments set forth herein; on the contrary, these embodiments are provided to make the present application more comprehensive and complete, and to fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings represent the same or similar structures, and thus repeated description thereof will be omitted. The expressions of position and direction described in the present application are described with reference to the drawings, but can be changed as needed, and the changes made are included in the scope of protection of the present application. The drawings of the present application are only used to illustrate the relative positional relationship and do not represent the true proportions.

[0017] The projection display is a method or device for controlling a light source by a planar image information, and magnifying and displaying an image on a projection screen by an optical system and a projection space. With the development of projection display technology, the projection display is gradually applied to business activities, conference exhibitions, scientific education, military command, traffic management, centralized monitoring and advertising entertainment, and has advantages such as a larger display screen size and clear display, which are also suitable for the requirements of large screen display.

[0018] The commonly used projection system at present is a digital light processing (DLP) architecture, which uses a digital micromirror device (DMD) as a core device. Light rays emitted by a projection light source are incident on the DMD to generate an image, and the emitted light of the image generated by the DMD is incident on a projection lens to form an image, and finally received by a projection screen.

[0019] The projection light source can adopt an MCL laser, and the MCL laser has high integration, which is beneficial to the miniaturization development of the laser light source.

[0020] However, due to the difference in the number and arrangement of laser chips of different colors, the spot sizes and positions of laser beams of different colors emitted by the laser are not the same. After the laser beams of different colors are mixed, the spot size is large, and the mixing is uneven, which affects the subsequent homogenization effect and display effect.

[0021] Therefore, the embodiment of the present application provides a laser light source device which can reduce the spot size after the laser beams of different colors are mixed and make the color mixing more uniform.

[0022] Figure 1 The laser light source device provided by the embodiment of the present application is shown in one of the optical path diagrams.

[0023] As shown in Figure 1 The laser light source device includes a laser 100 and a light mixing assembly 200.

[0024] The laser 100 can adopt an MCL laser, and the laser 100 is provided with at least two kinds of laser chips 10. Laser chips of the same color are arranged into a laser chip group s, and each laser chip 10 in each laser chip group s is arranged into an M-row N-column matrix. M and N are both integers greater than or equal to 1, and M and N are not 1 at the same time.

[0025] The laser beams emitted by the laser chips 10 have high collimation, and the laser beams emitted by the laser chips 10 of different colors do not overlap.

[0026] The light mixing assembly 200 is located on the light emitting side of the laser 100 and is used to fold and combine the laser beams of different colors emitted by each laser chip group s through an optical path to the same position and then emit them to a set direction.

[0027] The light mixing assembly 200 includes a mirror and a light mixing mirror. The mirror is used to fold the laser beams through an optical path, and the light mixing mirror is used to mix the laser beams of different colors. Finally, the laser beams emitted by each laser chip group are combined to the same position, so that the positions of the laser spots of different colors are overlapped, the spot size is reduced, and the color mixing of the laser beams of different colors is more sufficient.

[0028] In specific implementation, the light emitting side of the laser is also provided with a light homogenizing component. The spot size of the laser after light mixing through the light mixing assembly is small, which is more matched with the size of the light homogenizing component, which is beneficial to improving the light homogenizing effect of the light homogenizing component, and further optimizing the projection display effect.

[0029] by Figure 1 Taking the laser source device shown as an example, the laser chips 10 form a 2×7 chip array, i.e., M=2, N=7. This array can include laser chips of three colors, forming three laser chip groups: the first laser chip group s1, the second laser chip group s2, and the third laser chip group s3. The three laser chip groups are arranged side-by-side.

[0030] The light combining component 200 may include a first reflector a1, a second reflector a2, a first light combining mirror b1, and a second light combining mirror b2.

[0031] The first reflector a1 is located on the light-emitting side of the first laser chip group s1, the second laser chip group s2, and the third laser chip group s3; the second reflector a2 is located on the reflection path of the first reflector a1; the first beam combiner b1 is located at the intersection of the reflection paths of the second reflector a2 and the first reflector a1; and the second beam combiner b2 is located at the intersection of the emission path of the first beam combiner b1 and the reflection path of the first reflector a1. The second reflector a2, the first beam combiner b1, and the second beam combiner b2 are arranged parallel to each other.

[0032] Specifically, the emitted beams from the first laser chip group s1, the second laser chip group s2, and the third laser chip group s3 are incident on the first reflecting mirror a1 and reflected. Specifically, the emitted beam from the first laser chip group s1 is reflected by the first reflecting mirror a1 to the second reflecting mirror a2; the emitted beam from the second laser chip group s2 is reflected by the first reflecting mirror a1 to the first beam combiner b1; and the emitted beam from the third laser chip group s3 is reflected by the first reflecting mirror a1 to the second beam combiner b2. The second reflecting mirror a2 reflects the received emitted beam from the first laser chip group s1 back to the first beam combiner b1. The first beam combiner b1 transmits the emitted beam from the first laser chip group s1 and reflects the emitted beam from the second laser chip group s2, thereby combining the emitted beams from the first laser chip group s1 and the second laser chip group s2, with the beam spots of the emitted beams from the first laser chip group s1 and the second laser chip group s2 being at essentially the same position. The second beam combiner b2 transmits the emitted beams from the first laser chip group s1 and the second laser chip group s2, and reflects the emitted beam from the third laser chip group s3, thereby combining the emitted beams from the first laser chip group s1, the second laser chip group s2, and the third laser chip group s3, and the spot positions of the emitted beams from the first laser chip group s1, the second laser chip group s2, and the third laser chip group s3 are basically the same.

[0033] When the three color laser chips are respectively a red light laser chip, a green light laser chip and a blue light laser chip, the laser light source structure can combine the red laser light beams, the green laser light beams and the blue laser light beams at the same position, so that the spot size of the combined light is reduced, and the mixed light is uniform white light, which matches the incident light size of the light homogenizing component.

[0034] Figure 2 A schematic diagram of a planar structure of a laser provided by an embodiment of the present application is shown.

[0035] As shown in Figure 2 , the laser provided by the embodiment of the present application can include three laser chips, which are a first laser chip 11, a second laser chip 12 and a third laser chip 13. The laser wavelengths emitted by the first laser chip 11, the second laser chip 12 and the third laser chip 13 are different, and the laser beams emitted by the first laser chip 11, the second laser chip 12 and the third laser chip 13 are mixed into white light.

[0036] The first laser chip 11, the second laser chip 12 and the third laser chip are one of a red light laser chip, a green light laser chip and a blue light laser chip. For example, the first laser chip 11 can be a green light laser chip, the second laser chip 12 can be a red light laser chip, and the third laser chip 13 can be a blue light laser chip, which is not limited herein.

[0037] As shown in Figure 2 , a plurality of first laser chips 11 are arranged into a first laser chip group s1, a plurality of second laser chips 12 are arranged into a second laser chip group s2, and a plurality of third laser chips 13 are arranged into a third laser chip group s3. The second laser chip group s2 and the third laser chip group s3 are arranged in a row along a first direction x, and the first laser chip group s1 and the second laser chip group s2 are arranged in a column along a second direction y. The first direction x can be the row direction of the laser chip array, and the second direction y can be the column direction of the laser chip array. The first direction x and the second direction y are perpendicular to each other.

[0038] In the embodiment of the present application, a plurality of laser chips emitting different color laser beams can be packaged in the same laser, so that a plurality of color laser beams can be emitted by using only one laser, and the purpose of emitting three primary color light beams can be achieved. Figure 2 As shown in , the laser chip array is a 2x7 array, and other forms of arrays can also be arranged, which are not limited herein.

[0039] When the two-row laser chip array as shown in Figure 2 is used, the array size formed by the first laser chip group s1 is equal to the array size formed by the second laser chip group s2 and the third laser chip group s3, so that the laser chips can form a regular array arrangement.

[0040] Figure 3 Fig. 2 is a schematic diagram of a light path of a laser light source device according to an embodiment of the present application.

[0041] In some embodiments, as shown in Fig. 2, when the laser chip array arrangement as shown in Fig. 1 is adopted, the light combining assembly includes a first mirror a1, a second mirror a2, a third mirror a3, a first light combining mirror b1, and a second light combining mirror b2. Figure 3 Figure 2 In some embodiments, as shown in Fig. 2, when the laser chip array arrangement as shown in Fig. 1 is adopted, the light combining assembly includes a first mirror a1, a second mirror a2, a third mirror a3, a first light combining mirror b1, and a second light combining mirror b2.

[0042] In some embodiments, as shown in Fig. 2, when the laser chip array arrangement as shown in Fig. 1 is adopted, the light combining assembly includes a first mirror a1, a second mirror a2, a third mirror a3, a first light combining mirror b1, and a second light combining mirror b2.

[0043] In some embodiments, as shown in Fig. 2, when the laser chip array arrangement as shown in Fig. 1 is adopted, the light combining assembly includes a first mirror a1, a second mirror a2, a third mirror a3, a first light combining mirror b1, and a second light combining mirror b2.

[0044] ​Using the first reflecting mirror a1 to deflect the light, the first beam combiner b1 first combines the emitted beams from the first laser chip group s1 and the third laser chip group s3, resulting in beams with essentially the same spot position. Then, using the second reflecting mirror a2 and the third reflecting mirror a3 to deflect the light, the second beam combiner b2 combines the beams from the first laser chip group s1 and the third laser chip group s3 with the beams from the second laser chip group s2, again resulting in beams with essentially the same spot position.

[0045] When the first laser chip 11, the second laser chip 12, and the third laser chip 13 are respectively red laser chips, green laser chips, and blue laser chips, the above-mentioned laser source structure can combine the red laser beam, the green laser beam, and the blue laser beam at the same position, thereby reducing the size of the combined light spot and mixing it into uniform white light, which matches the incident light size of the homogenizing component.

[0046] Figure 4 The third schematic diagram of the optical path of the laser source device provided in the embodiment of the present invention.

[0047] In some embodiments, such as Figure 4 As shown, when using as Figure 2 When the laser chip array shown is arranged, the light combining component includes: a first reflector a1, a second reflector a2, a third reflector a3, a first light combining mirror b1, and a second light combining mirror b2.

[0048] The first reflector a1 is located on the light-emitting side of the first laser chip group s1; the first beam combiner b1 is located at the intersection of the reflection path of the first reflector a1 and the light-emitting path of the second laser chip group s2; the second reflector a2 is located on the light-emitting side of the third laser chip group s3; the third reflector a3 is located on the emission path of the first beam combiner b1; and the second beam combiner b2 is located at the intersection of the reflection path of the second reflector a2 and the reflection path of the third reflector a3.

[0049] Specifically, the outgoing light beams of the first laser chip group s1 are incident to the first mirror a1, which is configured to reflect the outgoing light beams of the first laser chip group s1 towards the first light combiner b1. The outgoing light beams of the second laser chip group s2 are incident to the first light combiner b1, which is configured to transmit the outgoing light beams of the first laser chip group s1 reflected by the first mirror a1 and reflect the outgoing light beams of the second laser chip group s2, so that the outgoing light beams of the first laser chip group s1 and the outgoing light beams of the second laser chip group s2 are combined and then exit towards the third mirror a3. The outgoing light beams of the third laser chip group s3 are incident to the second mirror a2, which is configured to reflect the outgoing light beams of the third laser chip group s3 towards the second light combiner b2. The third mirror a3 is configured to reflect the outgoing light beams of the first laser chip group s1 and the outgoing light beams of the second laser chip group s2, which are combined by the first light combiner b1, towards the second light combiner b2. The second light combiner b2 is configured to transmit the outgoing light beams of the first laser chip group s1 and the outgoing light beams of the second laser chip group s2, which are reflected by the third mirror a3, and reflect the outgoing light beams of the third laser chip group s3, which are reflected by the second mirror a2, so that the combined light beams of the first laser chip group s1 and the second laser chip group s2 are combined with the outgoing light beams of the third laser chip group s3.

[0050] By means of the turning of the light beams by the first mirror a1, the first light combiner b1 is used to combine the outgoing light beams of the first laser chip group s1 and the outgoing light beams of the second laser chip group s2, so that the spot positions of the outgoing light beams of the first laser chip group s1 and the outgoing light beams of the second laser chip group s2 after the combination are substantially the same. By means of the turning of the light beams by the second mirror a2 and the third mirror a3, the second light combiner b2 is used to combine the outgoing light beams of the first laser chip group s1 and the outgoing light beams of the second laser chip group s2 after the combination with the outgoing light beams of the third laser chip group s3, so that the spot positions of the outgoing light beams of the first laser chip group s1, the outgoing light beams of the second laser chip group s2 and the outgoing light beams of the third laser chip group s3 after the combination are substantially the same.

[0051] When the first laser chip 11, the second laser chip 12 and the third laser chip 13 are red laser chips, green laser chips and blue laser chips respectively, the above laser light source structure can be used to combine the red laser beams, the green laser beams and the blue laser beams at the same position, so that the spot size of the combined light is reduced and the combined light is mixed into uniform white light, which matches the size of the incident light of the light homogenizing component.

[0052] Therefore, when the above laser light source structure is used, Figure 2The same structure of the laser chip array shown can change the setting position of the mirror and the light combiner as needed, so as to obtain different light combination. In a specific implementation, the positions of the mirror and the light combiner can be adjusted according to the distribution of the laser chips, and any deformation scheme in which the laser beams of two colors are first combined, and then the combined laser beams are combined with laser beams of another color, so that the positions of the light spots of laser beams of different colors are substantially the same, belongs to the protection scope of the present application.

[0053] Figure 5 The second schematic diagram of the planar structure of the laser provided by the embodiment of the present application.

[0054] As shown in the figure, Figure 5 The laser provided by the embodiment of the present application can include three laser chips, which are a first laser chip 11, a second laser chip 12, and a third laser chip 13.

[0055] The first laser chip 11, the second laser chip 12, and the third laser chip are one of a red laser chip, a green laser chip, and a blue laser chip. For example, the first laser chip 11 can be a red laser chip, the second laser chip 12 can be a green laser chip, and the third laser chip 13 can be a blue laser chip, which is not limited herein.

[0056] As shown in the figure, Figure 5 A plurality of first laser chips 11 are arranged into two laser chip groups, which are a first laser chip group s1 and a second laser chip group s2; a plurality of second laser chips 12 are arranged into the second laser chip group s2, and a plurality of third laser chips 13 are arranged into a fourth laser chip group s4. Among them, the first laser chip group s1 and the third laser chip group s3 are arranged in a row along a first direction x, and the second laser chip group s2 and the fourth laser chip group s4 are arranged in a row along the first direction x; the first laser chip group s1 and the second laser chip group s2 are arranged in a column along a second direction y, and the third laser chip group s3 and the fourth laser chip group s4 are arranged in a column along the second direction y. The first direction x can be the row direction of the laser chip array, and the second direction y can be the column direction of the laser chip array, wherein the first direction x and the second direction y are perpendicular to each other.

[0057] In the embodiment of the present application, a plurality of laser chips emitting laser beams of different colors can be packaged in the same laser, so that a plurality of colors of laser beams can be emitted by using only one laser, and the purpose of emitting three primary color lights can be achieved. Figure 5 The laser chip array shown is a 2x7 array, and in addition, other forms of arrays can also be arranged, which are not limited herein.

[0058] When the laser chip array shown in the figure is used, Figure 5As shown in the two rows of laser chip arrays, the array size formed by the first laser chip group s1 and the third laser chip group s3 is equal to the array size formed by the second laser chip group s2 and the fourth laser chip group s4, so that the laser chips can form a regular array arrangement.

[0059] Figure 6 A fourth optical path schematic diagram of the laser light source device provided by the embodiment of the present application.

[0060] In some embodiments, as Figure 6 shown, when the laser chip array arrangement as Figure 5 shown is adopted, the first laser chip group s1 and the second laser chip group s2 emit first linearly polarized light; the third laser chip group s3 and the fourth laser chip group s4 emit second linearly polarized light; the polarization directions of the first linearly polarized light and the second linearly polarized light are perpendicular to each other. For example, the first linearly polarized light emitted by the first laser chip group s1 and the second laser chip group s2 is s light, and the second linearly polarized light emitted by the third laser chip group s3 and the fourth laser chip group s4 is p light. Among them, the p light refers to linearly polarized light whose polarization direction is parallel to the light entrance surface, and the s light refers to linearly polarized light whose polarization direction is perpendicular to the light entrance surface.

[0061] As Figure 6 shown, the projection system further includes: a first half-wave plate 31 and a second half-wave plate 32; wherein the first half-wave plate 31 is located on the light exit side of the first laser chip group s1 and the third laser chip group s3; the second half-wave plate 32 is located on the light exit side of the fourth laser chip group s4; the first half-wave plate 31 and the second half-wave plate 32 are both used to convert the first linearly polarized light into the second linearly polarized light, or to convert the second linearly polarized light into the first linearly polarized light.

[0062] The first linearly polarized light emitted by the first laser chip group s1 is converted into the second linearly polarized light after passing through the first half-wave plate 31, for example, the s light emitted by the first laser chip group s1 is converted into p light after passing through the first half-wave plate 31. The second linearly polarized light emitted by the third laser chip group s3 is converted into the first linearly polarized light after passing through the first half-wave plate 31, for example, the p light emitted by the third laser chip group s3 is converted into s light after passing through the first half-wave plate 31. The second linearly polarized light emitted by the fourth laser chip group s4 is converted into the first linearly polarized light after passing through the first half-wave plate 31, for example, the p light emitted by the third laser chip group s3 is converted into s light after passing through the first half-wave plate 31.

[0063] The light combination assembly comprises a first reflector a1, a second reflector a2, a first light combination mirror b1, a second light combination mirror b2 and a polarization light combination mirror c. The first reflector a1 is located at the light emitting side of the first laser chip group s1 and the third laser chip group s3; the first light combination mirror b1 is located at the intersection of the light emitting path of the fourth laser chip group s4 and the reflection path of the first reflector a1; the polarization light combination mirror c is located at the intersection of the light emitting path of the second laser chip group s2 and the reflection path of the first reflector a1; the second reflector a2 is located on the light emitting path of the first light combination mirror b1; and the second light combination mirror b2 is located at the intersection of the reflection path of the second reflector a2 and the light emitting path of the polarization light combination mirror c.

[0064] The following takes the first laser chip group s1 and the second laser chip group s2 to emit s light and the third laser chip group s3 and the fourth laser chip group s4 to emit p light as an example to describe the specific light path.

[0065] Specifically, the outgoing beams of the first laser chip group s1 and the third laser chip group s3 are first incident to the first half-wave plate 31, the s light emitted by the first laser chip group s1 is converted into p light, and the p light emitted by the third laser chip group s3 is converted into s light. Then the converted p light of the first laser chip group s1 and the converted s light of the third laser chip group s3 are incident to the first mirror a1, the first mirror a1 is used to reflect the p light emitted by the first laser chip group s1 to the direction of the polarization combining mirror c, and reflect the s light emitted by the third laser chip group s3 to the first combining mirror b1. The s light emitted by the second laser chip group s2 is incident to the polarization combining mirror c, the polarization combining mirror c is used to transmit the p light and reflect the s light, so the p light reflected by the first mirror a1 is transmitted, and the s light emitted by the second laser chip group s2 is reflected, so that the outgoing beams of the first laser chip group s1 and the second laser chip group s2 are combined, and the combined beams are emitted to the direction of the second combining mirror b2. The p light emitted by the fourth laser chip group s4 is first incident to the second half-wave plate 32 and is converted into s light. The converted p light of the fourth laser chip group s4 is incident to the first combining mirror b1, the first combining mirror b1 is used to transmit the p light of the third laser chip group s3 reflected by the first mirror a1 and reflect the s light emitted by the fourth laser chip group s4, so that the outgoing beams of the third laser chip group s3 and the fourth laser chip group s4 are combined, and the combined beams are emitted to the direction of the second mirror a2. The second mirror a2 is used to reflect the combined beams of the third laser chip group s3 and the fourth laser chip group s4 emitted by the first combining mirror to the second combining mirror b2. The second combining mirror b2 is used to transmit the combined beams of the third laser chip group s3 and the fourth laser chip group s4 reflected by the second mirror a2 and reflect the combined beams of the first laser chip group s1 and the second laser chip group s2 emitted by the polarization combining mirror c, so that the outgoing beams of the first laser chip group s1, the second laser chip group s2, the third laser chip group s3 and the fourth laser chip group s4 are combined.

[0066] The laser chips contained in the first laser chip group s1 and the second laser chip group s2 are of the same type, therefore, the embodiment of the present application changes the polarization direction of the emergent light of the first laser chip group s1 by using the first half-wave plate 31, so that the polarization directions of the first laser chip group s1 and the second laser chip group s2 are perpendicular to each other, the light is turned by using the first mirror a1, and the two beams of light of the same color and perpendicular to each other in polarization direction are combined by using the polarization combining mirror, so that the spot positions of the emergent beams of the first laser chip group s1 and the second laser chip group s2 after combination are basically the same. The light is turned by using the first mirror a1 again, the emergent beams of the third laser chip group s3 and the fourth laser chip group s4 of different colors are combined by using the first combining mirror b1, so that the spot positions of the emergent beams of the third laser chip group s3 and the fourth laser chip group s4 after combination are basically the same. The emergent directions of the two beams of light after combination are parallel to each other, one of the combined beams is reflected by using the second mirror a2 towards the direction of the second combining mirror b2, so that the two beams of light after combination are combined again by using the second combining mirror b2, thereby combining the emergent beams of the first laser chip group s1, the second laser chip group s2, the third laser chip group s3 and the fourth laser chip group s4, and the spot positions of the emergent beams of the first laser chip group s1, the second laser chip group s2, the third laser chip group s3 and the fourth laser chip group s4 after combination are basically the same.

[0067] In the embodiment of the present application, the combining mirror can be a dichroic mirror, since the first laser chip group s1 and the second laser chip group s2 emit laser beams of the same color, the dichroic mirror cannot be used to combine the two laser beams, therefore, the embodiment of the present application adds a half-wave plate to convert the laser beams of the same color into two laser beams of perpendicular polarization directions, and then combine the two laser beams by using the polarization combining mirror. The laser beams of different colors can be combined by using the dichroic mirror, because the transmittance of the polarization combining mirror is lower than that of the dichroic mirror, and the polarization combining mirror will lose a part of light. In the laser, the output brightness of the green laser is the highest, therefore, as long as the brightness of the green laser is not lost, the output brightness of the laser will not be affected too much.

[0068] Therefore, in the embodiment of the present application, the first laser chip 11 can adopt a red laser chip or a blue laser chip which has less influence on brightness. For example, when the first laser chip 11 adopts a red laser chip, the second laser chip 12 can adopt a blue laser chip, and the third laser chip 13 can adopt a green laser chip; or, the second laser chip 12 can adopt a green laser chip, and the third laser chip 13 can adopt a blue laser chip. When the first laser chip 11 adopts a blue laser chip, the second laser chip 12 can adopt a red laser chip, and the third laser chip 13 can adopt a green laser chip; or, the second laser chip 12 can adopt a green laser chip, and the third laser chip 13 can adopt a red laser chip, which is not limited herein.

[0069] In another aspect, the embodiment of the present application further provides a projection system, Figure 7 The structure schematic diagram of the projection system provided by the embodiment of the present application is shown in the figure.

[0070] As shown in the figure, Figure 7 the projection system provided by the embodiment of the present application comprises the laser light source device 1 described above, a diffusion sheet 2 located at the light emitting side of the laser light source device 1, a telescope imaging lens group 3 located at the side of the diffusion sheet 2 away from the laser light source device 1, a light uniformizing component 4 located on the light emitting path of the telescope imaging lens group 3, an illumination light path 5 located at the side of the light uniformizing component 4 away from the telescope imaging lens group 3, a light valve modulation component 6 located at the light emitting side of the illumination light path 5, and a projection lens 7 located at the light emitting side of the light valve modulation component 6.

[0071] The laser light source device provided by the embodiment of the present application can make the spot positions of the combined laser beams of different colors basically the same, thereby effectively reducing the spot size and making the mixed light more uniform.

[0072] In the embodiment of the present application, as shown in the figure, Figure 7 the light uniformizing component 4 can adopt a compound eye lens group, the compound eye lens group comprises a first compound eye lens and a second compound eye lens arranged oppositely, and the surfaces of the first compound eye lens and the second compound eye lens each comprise micro lens units arranged in an array. The laser beams emitted by the laser light source device 1 are focused to the centers of the micro lens units of the second compound eye lens after passing through the first compound eye lens, and the second compound eye lens overlaps the imaging light rays of the first compound eye lens to form an image on an illumination surface. In this way, the uniformity and the illumination brightness of the illumination light beams are effectively improved. The laser light source device provided by the embodiment of the present application effectively reduces the size of the laser spot, makes the mixed light more uniform, and makes the size of the emitted spot more matched with the size of the light entrance surface of the compound eye lens group, so that the laser spot can be effectively incident to the compound eye lens group, which is beneficial to improve the light uniformizing effect of the compound eye lens group.

[0073] The emergent light of the laser light source device 1 firstly passes through the diffusion sheet 2 for diffusion and the telescope imaging system 3, and then is incident to the homogenizing component 4 for further homogenization. The homogenized light beam is incident to the light valve modulation component 6, which can be a DMD, and is the core device of the whole projection system. The following is described by taking the single-chip DMD application as an example. The DMD is a reflective light valve device. After passing through the illumination light path, the light beam meets the illumination size and incident angle required by the DMD. The surface of the DMD includes thousands of tiny mirrors, each of which can be driven to deflect individually. By controlling the deflection angle of the DMD, the reflected light is incident to the projection lens 7, and after imaging through the projection lens 7, is used for projection imaging.

[0074] According to the first application concept, the laser light source device comprises: a laser and a light combination assembly, the laser comprises at least two colors of laser chips, laser chips of the same color are arranged into a laser chip group, and each laser chip is arranged in an array; the light combination assembly is located on the light emergent side of the laser, and is used for combining different color laser beams emitted by each laser chip group through light path turning to the same position and then emitting to a set direction. The light combination assembly comprises a mirror and a light combination lens, the laser beams are turned through the light path by the mirror, different color laser beams are combined by the light combination lens, and finally the laser beams emitted by each laser chip group are combined to the same position, so that the positions of laser spots of different colors are overlapped, the spot size is reduced, and the mixing of laser beams of different colors is more sufficient.

[0075] According to the second application concept, the laser chip comprises: a first laser chip, a second laser chip and a third laser chip, the laser beams emitted by the first laser chip, the second laser chip and the third laser chip are different in wavelength, and the laser beams emitted by the first laser chip, the second laser chip and the third laser chip are mixed into white light.

[0076] According to the third application concept, the first laser chip, the second laser chip and the third laser chip are one of red laser chips, green laser chips and blue laser chips respectively.

[0077] According to the fourth application concept, a plurality of first laser chips are arranged into a first laser chip group, a plurality of second laser chips are arranged into a second laser chip group, and a plurality of third laser chips are arranged into a third laser chip group; wherein the second laser chip group and the third laser chip group are arranged in a row along a first direction, the first laser chip group and the second laser chip group are arranged in a column along a second direction; the first direction and the second direction are perpendicular to each other; the array size formed by the first laser chip group is equal to the array size formed by the second laser chip group and the third laser chip group, so that the laser chips can form a regular array arrangement.

[0078] According to the fifth inventive concept, the light combination assembly comprises: a first mirror, a second mirror, a third mirror, a first light combination mirror and a second light combination mirror; the first mirror is used for reflecting the outgoing light beams of the first laser chip group; the second mirror is used for reflecting the outgoing light beams of the second laser chip group; the first light combination mirror is used for transmitting the outgoing light beams of the first laser chip group emitted by the first mirror and reflecting the outgoing light beams of the third laser chip group; the third mirror is used for reflecting the outgoing light beams of the second laser chip group emitted by the second mirror; the second light combination mirror is used for transmitting the outgoing light beams of the second laser chip group emitted by the third mirror and reflecting the outgoing light beams of the first laser chip group and the third laser chip group emitted by the first light combination mirror to form white light emission. The first mirror is used for turning the light rays, the first light combination mirror is used for combining the outgoing light beams of the first laser chip group and the outgoing light beams of the third laser chip group first, so that the spot positions of the outgoing light beams of the first laser chip group and the outgoing light beams of the third laser chip group after the combination are basically the same. The second mirror and the third mirror are used for turning the light rays again, and the second light combination mirror is used for combining the outgoing light beams of the first laser chip group and the third laser chip group after the combination with the second laser chip group again, so that the spot positions of the outgoing light beams of the first laser chip group, the outgoing light beams of the second laser chip group and the outgoing light beams of the third laser chip group after the combination are basically the same.

[0079] According to the sixth inventive concept, the light combination assembly comprises: a first mirror, a second mirror, a third mirror, a first light combination mirror and a second light combination mirror; the first mirror is used for reflecting the outgoing light beams of the first laser chip group; the first light combination mirror is used for reflecting the outgoing light beams of the second laser chip group and transmitting the outgoing light beams of the first laser chip group emitted by the first mirror; the second mirror is used for reflecting the outgoing light beams of the third laser chip group; the third mirror is used for reflecting the outgoing light beams of the first laser chip group and the second laser chip group emitted by the first light combination mirror; the second light combination mirror is used for transmitting the outgoing light beams of the first laser chip group and the second laser chip group emitted by the third mirror and reflecting the outgoing light beams of the third laser chip group emitted by the second mirror to form white light emission. The first mirror is used for turning the light rays, the first light combination mirror is used for combining the outgoing light beams of the first laser chip group and the outgoing light beams of the second laser chip group first, so that the spot positions of the outgoing light beams of the first laser chip group and the outgoing light beams of the second laser chip group after the combination are basically the same. The second mirror and the third mirror are used for turning the light rays again, and the second light combination mirror is used for combining the outgoing light beams of the first laser chip group and the second laser chip group after the combination with the third laser chip group again, so that the spot positions of the outgoing light beams of the first laser chip group, the outgoing light beams of the second laser chip group and the outgoing light beams of the third laser chip group after the combination are basically the same.

[0080] According to the seventh inventive concept, the plurality of first laser chips are arranged into two groups of laser chips, respectively a first group of laser chips and a second group of laser chips; the plurality of second laser chips are arranged into a third group of laser chips, and the plurality of third laser chips are arranged into a fourth group of laser chips; wherein the first group of laser chips and the third group of laser chips are arranged in a row along a first direction, and the second group of laser chips and the fourth group of laser chips are arranged in a row along the first direction; the first group of laser chips and the second group of laser chips are arranged in a column along a second direction, and the third group of laser chips and the fourth group of laser chips are arranged in a column along the second direction; the first direction and the second direction are perpendicular to each other.

[0081] According to the eighth inventive concept, the first laser chip group and the second laser chip group emit first linearly polarized light; the third laser chip group and the fourth laser chip group emit second linearly polarized light; the polarization directions of the first linearly polarized light and the second linearly polarized light are perpendicular to each other; the laser light source device further comprises: a first half-wave plate and a second half-wave plate; wherein the first half-wave plate is located on the light-emitting side of the first laser chip group and the third laser chip group; the second half-wave plate is located on the light-emitting side of the fourth laser chip group; the first half-wave plate and the second half-wave plate are both used to convert the first linearly polarized light into the second linearly polarized light, or convert the second linearly polarized light into the first linearly polarized light; the light combining assembly comprises: a first mirror, a second mirror, a first light combining mirror, a second light combining mirror and a polarization light combining mirror; the first mirror is used to reflect the emitted beams of the first laser chip group and the third laser chip group; the first light combining mirror is used to transmit the emitted beam of the third laser chip group emitted by the first mirror and reflect the emitted beam of the fourth laser chip group; the polarization light combining mirror is used to transmit the emitted beam of the first laser chip group emitted by the first mirror and reflect the emitted beam of the second laser chip group; the second mirror is used to reflect the emitted beams of the third laser chip group and the fourth laser chip group emitted by the first light combining mirror; the second light combining mirror is used to transmit the emitted beams of the third laser chip group and the fourth laser chip group emitted by the second mirror and reflect the emitted beams of the first laser chip group and the second laser chip group emitted by the polarization light combining mirror, forming white light emission. The types of laser chips contained in the first laser chip group and the second laser chip group are the same, the polarization direction of the emitted light of the first laser chip group is changed by using the first half-wave plate, so that the polarization directions of the first laser chip group and the second laser chip group are perpendicular to each other, the light is turned by using the first mirror, and the polarization light combining mirror is used to combine two beams with the same color and perpendicular polarization directions, so that the spot positions of the emitted beams of the first laser chip group and the second laser chip group after combining are basically the same. The light is turned by using the first mirror again, and the first light combining mirror is used to combine the emitted beams of the third laser chip group and the fourth laser chip group with different colors, so that the spot positions of the emitted beams of the third laser chip group and the fourth laser chip group after combining are basically the same. The emission directions of the two combined beams are parallel to each other, and one of the combined beams is reflected by the second mirror towards the second light combining mirror, so that the second light combining mirror combines the two combined beams again, thereby combining the emitted beams of the first laser chip group, the second laser chip group, the third laser chip group and the fourth laser chip group, and the spot positions of the emitted beams of the first laser chip group, the second laser chip group, the third laser chip group and the fourth laser chip group after combining are basically the same.

[0082] According to the ninth inventive concept, the light combining mirror is a dichroic mirror.

[0083] According to the tenth inventive concept, the first laser chip can adopt a red laser chip or a blue laser chip which has less impact on brightness. When the first laser chip adopts a red laser chip, the second laser chip can adopt a blue laser chip, and the third laser chip can adopt a green laser chip; or, the second laser chip can adopt a green laser chip, and the third laser chip can adopt a blue laser chip. When the first laser chip adopts a blue laser chip, the second laser chip can adopt a red laser chip, and the third laser chip can adopt a green laser chip; or, the second laser chip can adopt a green laser chip, and the third laser chip can adopt a red laser chip.

[0084] According to the eleventh inventive concept, the projection system comprises any of the laser light source devices described above, a diffusion sheet located at the light exit side of the laser light source device, a telescope imaging lens group located at the side of the diffusion sheet away from the laser light source device, a light uniformizing component located on the light exit path of the telescope imaging lens group, an illumination light path located at the side of the light uniformizing component away from the telescope imaging lens group, a light valve modulation component located at the light exit side of the illumination light path, and a projection lens located at the light exit side of the light valve modulation component.

[0085] According to the twelfth inventive concept, the light uniformizing component adopts an ommatidium lens group, the laser spot size emitted by the laser light source device is effectively reduced, the light mixing is more uniform, the exit spot size is more matched with the light entrance size of the ommatidium lens group, the laser spot can be effectively incident to the ommatidium lens group, and the light uniformizing effect of the ommatidium lens group is improved.

[0086] Although preferred embodiments of the application have been described, those skilled in the art will be able to make additional changes and modifications without departing from the spirit and scope of the application. Therefore, the appended claims are intended to cover all such changes and modifications that fall within the scope of the application.

[0087] Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the spirit and scope of the present application. Thus, it is intended that the present application embrace all such modifications and changes and accordingly, the appended claims are intended to cover all such modifications and changes as fall within the scope of the application.

Claims

1. A laser source device, characterized in that, include: A laser, comprising a first laser chip, a second laser chip, and a third laser chip, wherein the first laser chip, the second laser chip, and the third laser chip emit laser wavelengths of different wavelengths; the first laser chip, the second laser chip, and the third laser chip are respectively arranged into multiple laser chip groups, and each laser chip is arranged into an M-row N-column matrix; wherein M and N are both integers greater than or equal to 1, and M and N are not both 1; A beam combining component is located on the light-emitting side of the laser; the beam combining component includes: a first component, a second component, and a third component; the first component is used to reflect the emitted beam of at least one of the laser chip groups toward the second component along a third direction; the second component is used to combine the received beams and emit them toward the third component along a third direction; the third component is used to combine all the beams along a fourth direction and emit them; the third direction and the fourth direction are not parallel; The first component includes a first reflector; the second component includes a second reflector and a first beam combiner; and the third component includes a third reflector and a second beam combiner. Alternatively, the first component may include a first reflecting mirror; the second component may include a first beam combiner and a polarizing beam combiner; and the third component may include a second reflecting mirror and a second beam combiner.

2. The laser source device as described in claim 1, characterized in that, Multiple first laser chips are arranged into a first laser chip group, multiple second laser chips are arranged into a second laser chip group, and multiple third laser chips are arranged into a third laser chip group; Wherein, the second laser chip group and the third laser chip group are arranged in a row along a first direction, and the first laser chip group and the second laser chip group are arranged in a column along a second direction; the first direction and the second direction are perpendicular to each other. The array size formed by the first laser chip group is equal to the array size formed by the second laser chip group and the third laser chip group.

3. The laser source device as described in claim 2, characterized in that, The first component includes a first reflector; the second component includes a second reflector and a first beam combiner; the third component includes a third reflector and a second beam combiner; wherein, the first reflector is located on the light-emitting side of the first laser chip group; the second reflector is located on the light-emitting side of the second laser chip group; the first beam combiner is located at the intersection of the light-emitting path of the third laser chip group and the reflection path of the first reflector; the third reflector is located on the reflection path of the second reflector; and the second beam combiner is located at the intersection of the light-emitting path of the first beam combiner and the reflection path of the third reflector. The first reflector is used to reflect the emitted beam of the first laser chip group; The second reflector is used to reflect the emitted beam of the second laser chip group; The first beam combiner is used to transmit the emitted beam of the first laser chip group emitted from the first reflector and to reflect the emitted beam of the third laser chip group. The third reflector is used to reflect the emitted beam of the second laser chip group emitted from the second reflector; The second beam combiner is used to transmit the emitted beam of the second laser chip group emitted from the third reflector, and to reflect the emitted beams of the first laser chip group and the third laser chip group emitted from the first beam combiner to form white light emission.

4. The laser source device as described in claim 3, characterized in that, The first component includes a first reflector; the second component includes a second reflector and a first beam combiner; the third component includes a third reflector and a second beam combiner; wherein the first reflector is located on the light-emitting side of the first laser chip group; the first beam combiner is located at the intersection of the reflection path of the first reflector and the light-emitting path of the second laser chip group; the second reflector is located on the light-emitting side of the third laser chip group; the third reflector is located on the emission path of the first beam combiner; and the second beam combiner is located at the intersection of the reflection path of the second reflector and the reflection path of the third reflector. The first reflector is used to reflect the direction of the emitted beam from the first laser chip group; The first beam combiner is used to reflect the output beam of the second laser chip group and transmit the output beam of the first laser chip group emitted from the first reflector. The second reflector is used to reflect the emitted beam of the third laser chip group; The third reflector is used to reflect the emitted beams of the first laser chip group and the second laser chip group emitted from the first beam combiner. The second beam combiner is used to transmit the emitted beams of the first laser chip group and the second laser chip group emitted from the third reflector, and to reflect the emitted beam of the third laser chip group emitted from the second reflector, thereby forming white light emission.

5. The laser source device as described in claim 3 or 4, characterized in that, The first laser chip, the second laser chip, and the third laser chip are respectively one of a green laser chip, a blue laser chip, and a red laser chip.

6. The laser source device as described in claim 1, characterized in that, Multiple first laser chips are arranged into two laser chip groups, namely a first laser chip group and a second laser chip group; multiple second laser chips are arranged into a third laser chip group, and multiple third laser chips are arranged into a fourth laser chip group; Wherein, the first laser chip group and the third laser chip group are arranged in a row along a first direction, and the second laser chip group and the fourth laser chip group are arranged in a row along the first direction; the first laser chip group and the second laser chip group are arranged in a column along a second direction, and the third laser chip group and the fourth laser chip group are arranged in a column along the second direction; the first direction and the second direction are perpendicular to each other.

7. The laser source device as described in claim 6, characterized in that, The first laser chip group and the second laser chip group emit first linearly polarized light; the third laser chip group and the fourth laser chip group emit second linearly polarized light; the polarization directions of the first linearly polarized light and the second linearly polarized light are perpendicular to each other; The laser source device further includes: a first half-wave plate and a second half-wave plate; wherein, the first half-wave plate is located on the light-emitting side of the first laser chip group and the third laser chip group; the second half-wave plate is located on the light-emitting side of the fourth laser chip group; both the first half-wave plate and the second half-wave plate are used to convert the first linearly polarized light into the second linearly polarized light, or to convert the second linearly polarized light into the first linearly polarized light; The first component includes a first reflector; the second component includes a first beam combiner and a polarizing beam combiner; the third component includes a second reflector and a second beam combiner; wherein, the first reflector is located on the light-emitting side of the first laser chip group and the third laser chip group; the first beam combiner is located at the intersection of the light-emitting path of the fourth laser chip group and the reflection path of the first reflector; the polarizing beam combiner is located at the intersection of the light-emitting path of the second laser chip group and the reflection path of the first reflector; the second reflector is located on the emission path of the first beam combiner; the second beam combiner is located at the intersection of the reflection path of the second reflector and the emission path of the polarizing beam combiner. The first reflector is used to reflect the emitted beams of the first laser chip group and the third laser chip group; The first beam combiner is used to transmit the emitted beam of the third laser chip group emitted from the first reflector and to reflect the emitted beam of the fourth laser chip group. The polarizing beam combiner is used to transmit the emitted beam of the first laser chip group emitted from the first reflector and to reflect the emitted beam of the second laser chip group. The second reflector is used to reflect the emitted beams of the third laser chip group and the fourth laser chip group emitted from the first beam combiner. The second beam combiner is used to transmit the emitted beams of the third and fourth laser chip groups emitted from the second reflector, and to reflect the emitted beams of the first and second laser chip groups emitted from the polarizing beam combiner, thereby forming white light emission.

8. The laser source device as described in claim 7, characterized in that, The first laser chip is a red laser chip, the second laser chip is a blue laser chip, and the third laser chip is a green laser chip; Alternatively, the first laser chip may be a red laser chip, the second laser chip may be a green laser chip, and the third laser chip may be a blue laser chip; Alternatively, the first laser chip may be a blue laser chip, the second laser chip may be a red laser chip, and the third laser chip may be a green laser chip; Alternatively, the first laser chip may be a blue laser chip, the second laser chip may be a green laser chip, and the third laser chip may be a red laser chip.

9. A projection system, characterized in that, include: The laser source device as described in any one of claims 1-8; A diffuser is located on the light-emitting side of the laser source device; The telescope imaging lens group is located on the side of the diffuser that is away from the laser source device; The light-uniforming component is located on the light exit path of the telescope imaging lens group; The illumination optical path is located on the side of the uniform light component that is away from the telescope imaging lens group; A light valve modulation component is located on the light-emitting side of the illumination light path; and The projection lens is located on the light-emitting side of the light valve modulation component.

10. The projection system as claimed in claim 9, characterized in that, The light-diffusing component is a compound eye lens group.

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