Laser and projection device

Abstract

This application discloses a laser and a projection device, belonging to the field of optoelectronic technology. The laser includes: a tube housing with an opening on one side, and multiple light-emitting components arranged in multiple rows and columns within the accommodating space of the tube housing; each light-emitting component includes a light-emitting chip and a reflecting prism, the light-emitting chip emitting laser light towards the reflecting prism, and the reflecting prism reflecting the laser light back to the opening; the multiple light-emitting components include: a first light-emitting component and a second light-emitting component, the light-emitting chips in the first and second light-emitting components having their light-emitting directions perpendicular, and the laser light emitted by the light-emitting chips in the first and second light-emitting components having the same polarization direction after reflection by the reflecting prism. This application solves the problem of poor projection display effect in projection devices. This application is used for light emission.

Description

Technical Field

[0001] This application relates to the field of optoelectronic technology, and in particular to a laser and a projection device. Background Technology

[0002] With the development of optoelectronic technology, lasers are widely used, such as as a light source in projection equipment.

[0003] like Figure 1 As shown, the laser 00 in the related technology includes a housing 001, multiple light-emitting chips 002, and multiple reflecting prisms 003 corresponding to each of the multiple light-emitting chips 002. One side of the housing 001 has an opening, and the multiple light-emitting chips 002 and the multiple reflecting prisms 003 are all located within the accommodating space of the housing 001. The light-emitting chips 002 all emit light in the same direction, such as emitting light in the y1 direction. Each light-emitting chip 002 emits laser light towards its corresponding reflecting prism 003. The laser light is reflected by the reflecting prism 003 and then exits from the opening of the housing 001, thus realizing the emission of light by the laser. Furthermore, different light-emitting chips in the laser can emit red laser light, green laser light, and blue laser light respectively. The polarization direction of the red laser light is perpendicular to the polarization directions of the blue and green laser lights, therefore the laser light emitted by the laser light emits two different polarization directions.

[0004] Because display images formed using light with multiple polarization directions can exhibit color distortion, projection images formed using lasers as the light source in related technologies will also exhibit color distortion, resulting in poor projection display effects. Summary of the Invention

[0005] This application provides a laser and a projection device that can solve the problem of poor projection display effect in projection devices. The technical solution is as follows:

[0006] On one hand, a laser is provided, the laser comprising: a housing having an opening on one side, and a plurality of light-emitting components located in an accommodating space of the housing and arranged in multiple rows and columns;

[0007] The light-emitting component includes a light-emitting chip and a reflecting prism. The light-emitting chip is used to emit laser light into the reflecting prism, and the reflecting prism is used to reflect the laser light into the opening.

[0008] The plurality of light-emitting components include: a first light-emitting component and a second light-emitting component, wherein the light-emitting chip in the first light-emitting component and the light-emitting chip in the second light-emitting component have perpendicular light-emitting directions, and the laser emitted by the light-emitting chips in the first light-emitting component and the second light-emitting component have the same polarization direction after being reflected by the reflecting prism.

[0009] In another aspect, a projection device is provided, which includes the above laser, and an optical engine and a lens.

[0010] The technical scheme provided by the present application has at least the following beneficial effects:

[0011] In the laser provided by the present application, the light emitting chips in the first light emitting component and the light emitting chips in the second light emitting component are perpendicular to the light emitting direction, and the polarized directions of the laser emitted by the light emitting chips in the first light emitting component and the light emitting chips in the second light emitting component are the same after being reflected by the reflecting prism, that is, the laser emitted by the laser has only one polarized direction. In this way, when the laser is used as the light source of the projection device, the projection picture can be directly formed by using only light with one polarized direction, so that the color cast phenomenon of the projection picture is avoided, and the display effect of the projection picture is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical schemes in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0013] Figure 1 is a structural schematic diagram of a laser provided by the related art;

[0014] Figure 2 is a propagation schematic diagram of P-polarized light provided by an embodiment of the present application;

[0015] Figure 3 is a propagation schematic diagram of S-polarized light provided by an embodiment of the present application;

[0016] Figure 4 is a partial structural schematic diagram of a projection device provided by the related art;

[0017] Figure 5 is a structural schematic diagram of a laser provided by an embodiment of the present application;

[0018] Figure 6 is a structural schematic diagram of another laser provided by an embodiment of the present application;

[0019] Figure 7 is a structural schematic diagram of still another laser provided by an embodiment of the present application;

[0020] Figure 8 is a structural schematic diagram of yet another laser provided by an embodiment of the present application;

[0021] Figure 9 is a structural schematic diagram of a laser provided by another embodiment of the present application;

[0022] Figure 10 is a structural schematic diagram of another laser provided by another embodiment of the present application;

[0023] Figure 11 is a structural schematic diagram of still another laser provided by another embodiment of the present application;

[0024] Figure 12 is a schematic diagram of a light spot formed by laser emitted by a laser provided by an embodiment of the present application;

[0025] Figure 13 is a structural schematic diagram of yet another laser provided by another embodiment of the present application;

[0026] Figure 14 is a structural schematic diagram of a laser provided by still another embodiment of the present application;

[0027] Figure 15 is a structural schematic diagram of a projection device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0029] With the development of optoelectronic technology, lasers are widely used as light sources in projection devices. The laser currently emits laser light including two kinds of laser light with perpendicular polarization directions, and the display effect of a projection picture formed by laser light with multiple polarization directions is poor, thus leading to poor projection display effect of the projection device. In order to ensure that a projection picture is formed by laser light with only one polarization direction, a half-wave plate is arranged in the light-emitting direction of the laser in the projection device in the related art to modulate the polarization directions of the two kinds of laser light to the same direction. However, the projection device includes more structures, the volume of the projection device is large, and it is difficult to realize miniaturization of the projection device.

[0030] Please continue to refer to Figure 1 , the laser 00 includes 20 light-emitting chips 002, and the 20 light-emitting chips 002 are arranged in four rows and five columns, and the 20 light-emitting chips 002 all emit light in the y1 direction. Figure 1 The x1 direction in the light-emitting chip can be a row direction of the light-emitting chip, the y1 direction can be a column direction of the light-emitting chip, and the x1 direction is perpendicular to the y1 direction.

[0031] The laser 00 may include multiple light-emitting chips 002, such as a red light-emitting chip for emitting red laser light, a green light-emitting chip for emitting green laser light, and a blue light-emitting chip for emitting blue laser light. The red laser light is P-polarized, while the blue and green laser lights are S-polarized, with the polarization directions of the P-polarized and S-polarized light perpendicular to each other. It should be noted that when P-polarized light penetrates the surface of the optical element at a non-perpendicular angle, the polarization vector of the P-polarized light lies in the plane containing both the incident and reflected rays; when S-polarized light penetrates the surface of the optical element at a non-perpendicular angle, the polarization vector of the S-polarized light is perpendicular to the plane containing both the incident and reflected rays. Figure 2 This is a schematic diagram illustrating the propagation of P-polarized light according to an embodiment of this application. When P-polarized light passes through... Figure 2 When the plane A is shown, the polarization direction of the P-polarized light can be... Figure 2 The direction p shown, Figure 2 The waveform in the text refers to the waveform of P-polarized light. Figure 3 This is a schematic diagram illustrating the propagation of S-polarized light according to an embodiment of this application. When S-polarized light passes through... Figure 3 When the plane A is shown, the polarization direction of the S-polarized light can be... Figure 3 The direction s shown, Figure 3 The waveform in the text refers to the waveform of the S-polarized light wave. In plane A, direction p is perpendicular to direction s.

[0032] Combination Figure 1 , Figure 2 and Figure 3 It can be seen that, Figure 1 In the laser 00 shown, the red laser, after being reflected by the reflecting prism 003 and then emitted from the laser 20, has a polarization direction parallel to the y1 direction; the blue and green lasers, after being reflected by the reflecting prism 003 and then emitted from the laser 20, have polarization directions parallel to the x1 direction. Therefore, Figure 1 The polarization direction of the red laser emitted by the laser 20 shown is still perpendicular to the polarization directions of the blue and green lasers.

[0033] Figure 4 This is a partial structural diagram of a projection device provided by related technologies. For example... Figure 4 As shown, the projection device may include a laser 20 and a half-wave plate B. The half-wave plate B is configured to correspond to a portion of the laser emitted by the laser 20, such as by positioning the half-wave plate B along the transmission direction of that portion of the laser. This portion of the laser includes blue laser and green laser. Figure 4 The laser 00 shown can be Figure 1The diagram shows a left view of laser 00 after being rotated 180 degrees. A half-wave plate can be used to rotate the polarization direction of the laser to change its polarization polarity. Therefore, after passing through the half-wave plate, the polarization directions of the blue and green lasers become consistent with those of the red laser. Consequently, the projection device can use red, blue, and green lasers with the same polarization direction for projection, thus achieving color uniformity in the laser projection image.

[0034] Since the thickness of a half-wave plate is related to the wavelength of the laser light it transmits, related technologies require designing half-wave plates of corresponding thicknesses based on the wavelengths of the blue and green laser light emitted by the laser. Furthermore, half-wave plates are grown through crystal growth, resulting in high costs. They also require a support frame for fixation, which is challenging, and the installation of the half-wave plate occupies significant space within the projection equipment. Therefore, the resulting projection equipment is both expensive and bulky.

[0035] The following embodiments of this application provide a laser. Using this laser as the light source of a projection device can improve the projection display effect of the projection device, reduce the size of the projection device, reduce the cost of the projection device, and facilitate the miniaturization of the projection device.

[0036] Figure 5 This is a schematic diagram of the structure of a laser provided in an embodiment of this application. Figure 6 This is a schematic diagram of another laser structure provided in an embodiment of this application, and Figure 5 It can be Figure 6 A top view of the laser shown. Figure 5 and Figure 6 As shown, the laser 20 includes a housing 201 with an opening on one side, and a plurality of light-emitting components (not shown) located in the accommodating space of the housing 201. Each light-emitting component includes a light-emitting chip (such as a first-type light-emitting chip 202a or a second-type light-emitting chip 202b) and a reflecting prism 203. The light-emitting chip emits laser light into the reflecting prism 203, which reflects the laser light back to the opening of the housing 201, thereby enabling the laser to emit light. For example, the surface of the reflecting prism 203 facing the light-emitting chip can be a reflective surface used to reflect the laser light.

[0037] In this embodiment of the application, the plurality of light-emitting components are arranged in multiple rows and columns, such as... Figure 5 and Figure 6The row direction of the plurality of light-emitting components is the x2 direction, and the column direction is the y2 direction. The plurality of light-emitting components includes a first light-emitting component and a second light-emitting component. The light-emitting direction of the light-emitting chip in the first light-emitting component is perpendicular to the light-emitting direction of the light-emitting chip in the second light-emitting component. Furthermore, the polarization direction of the laser emitted by the light-emitting chip in the first light-emitting component after reflection by a reflecting prism is the same as the polarization direction of the laser emitted by the light-emitting chip in the second light-emitting component after reflection by a reflecting prism; that is, the polarization directions of the laser emitted by the first light-emitting component and the second light-emitting component are the same. In this embodiment, the light-emitting direction of the light-emitting chip refers to the transmission direction of the main ray in the laser beam emitted by the light-emitting chip. For example, the light-emitting chip in the first light-emitting component is a first-type light-emitting chip 202a, and the light-emitting chip in the second light-emitting component is a second-type light-emitting chip 202b. The light-emitting directions of the first-type light-emitting chip 202a and the second-type light-emitting chip 202b are perpendicular. For example, the light emission direction of the first type of light-emitting chip 202a is the y2 direction, and the light emission direction of the second type of light-emitting chip 202b is the x2 direction, which is perpendicular to the y2 direction.

[0038] In this embodiment, the light emission directions of the first type of light-emitting chip 202a and the second type of light-emitting chip 202b can both be parallel to or approximately parallel to the bottom surface M of the accommodating space of the housing 201, which is opposite to the opening of the housing 201. The housing 201 may include a base plate 2011 and an annular shell wall 2012 located on the base plate 2011. The light-emitting chips and the reflecting prism 203 are attached to the base plate 2011 and surrounded by the shell wall 2012. The bottom surface M of the accommodating space of the housing 201 is the mounting surface of the base plate 2011, that is, the surface of the base plate 2011 surrounded by the shell wall 2012. It should be noted that this embodiment takes the arrangement of the various light-emitting components in the laser as an example of multiple rows and columns. Optionally, the multiple light-emitting components can also be arranged randomly or in other ways, as long as the light emission direction of the first type of light-emitting chip is perpendicular to the light emission direction of the second type of light-emitting chip.

[0039] In this embodiment, the polarization directions of the lasers emitted by the first type of light-emitting chip 202a and the second type of light-emitting chip 202b are perpendicular (or orthogonal). That is, the polarization direction of the laser emitted from the first type of light-emitting chip 202a towards the corresponding reflecting prism 203 is perpendicular to the polarization direction of the laser emitted from the second type of light-emitting chip 202a towards the corresponding reflecting prism 203. In this embodiment, the corresponding light-emitting chip and reflecting prism refer to the light-emitting chip and reflecting prism within the same light-emitting component. It should be noted that the polarization direction of the laser is perpendicular to its transmission direction. In this embodiment, the light-emitting directions of both the first type of light-emitting chip 202a and the second type of light-emitting chip 202b are parallel to the bottom surface M, and the light-emitting direction of the first type of light-emitting chip 202a is perpendicular to the light-emitting direction of the second type of light-emitting chip 202b. Therefore, in the first type of light-emitting chip 202a and the second type of light-emitting chip 202b, the polarization direction of the laser emitted by one type of light-emitting chip is parallel to the bottom surface M, while the polarization direction of the laser emitted by the other type of light-emitting chip is perpendicular to the bottom surface M. For example, the polarization direction of the laser emitted by the first type of light-emitting chip 202a is perpendicular to the bottom surface M, and the polarization direction of the laser emitted by the second type of light-emitting chip 202b is parallel to the bottom surface M. The polarization direction of the laser emitted by the second type of light-emitting chip 202b is parallel to the light emission direction of the first type of light-emitting chip 202a.

[0040] In this embodiment, the reflecting surface of the reflecting prism forms an acute angle with the bottom surface M, such as 45 degrees. For laser light incident on the reflecting surface of the prism, if the polarization direction of the laser light is parallel to the reflecting surface, the polarization direction of the laser light will not change after being reflected by the reflecting surface. If the polarization direction of the laser light intersects the reflecting surface, the polarization direction of the laser light will change after being reflected by the reflecting surface, and the angle of change in polarization direction can be the same as the angle between the incident light and the reflected light. In this embodiment, the polarization direction of the laser light is linear, and the bottom surface of the housing space of the tube forms an acute angle with the reflecting surface of the reflecting prism. Therefore, when the polarization direction of the laser light is parallel to the bottom surface M, the polarization direction of the laser light is parallel to the reflecting surface, and thus the polarization direction will not change after reflection by the reflecting prism; when the polarization direction of the laser light is perpendicular to the bottom surface M, the polarization direction of the laser light intersects with the reflecting surface of the reflecting prism, and thus the polarization direction will change after reflection by the reflecting prism, such as by rotating the polarization direction by 90 degrees.

[0041] It should be noted that a change in the polarization direction of a laser beam means a change in its polarization polarity. For example, the lasers emitted by both the first and second type of light-emitting chips change from a propagation direction parallel to the bottom surface to a propagation direction perpendicular to the bottom surface, with the angle between the incident and reflected light being 90 degrees. The polarization direction of the laser emitted by the first type of chip intersects the reflecting surface towards which it is directed, thus changing its polarization direction by 90 degrees to be parallel to the bottom surface and parallel to its original propagation direction. The polarization direction of the laser emitted by the second type of chip is parallel to the reflecting surface towards which it is directed, so its polarization direction remains unchanged and is still parallel to the original propagation direction of the laser emitted by the first type of chip. Therefore, after being reflected and emitted from the reflecting prism, the lasers emitted by each chip have the same polarization direction.

[0042] For example, in this embodiment, the laser emitted by the first type of light-emitting chip 202a can be P-polarized light, and the laser emitted by the second type of light-emitting chip 202b is S-polarized light, with the transmission directions of the P-polarized light and the S-polarized light perpendicular. For instance, if the first type of light-emitting chip 202a is used to emit red laser light, the second type of light-emitting chip 202b includes a light-emitting chip for emitting green laser light and a light-emitting chip for emitting blue laser light, wherein the red laser light is P-polarized light, and both the blue and green laser lights are S-polarized light.

[0043] Figure 7 This is a schematic diagram of another laser structure provided in the embodiments of this application. Figure 7 It can be Figure 5 and Figure 6 The diagram shows a cross-section a-a' in the laser, and Figure 7 The propagation mode of laser emitted by the first type of light-emitting chip is illustrated. Figure 7 The waveform shown is used to illustrate the waveform of the laser light wave emitted by the first type of light-emitting chip. For example... Figure 7 As shown, after the first type of light-emitting chip 202a emits laser light, the laser propagates towards the corresponding reflecting prism 203. The propagation direction of the laser is parallel to direction y2, and the polarization direction of the laser is perpendicular to the base plate 2011, that is, perpendicular to the y2 direction. Figure 5 or Figure 6 The polarization direction of the laser emitted by the first type of light-emitting chip 202a intersects with the reflecting surface of the corresponding reflecting prism 203. Therefore, after the laser is reflected on the reflecting surface of the reflecting prism 203 and propagates in a direction away from the base plate 201, the polarization direction of the laser changes and becomes parallel to the y2 direction. This situation is also the case where the polarity of the laser undergoes a 90-degree reversal.

[0044] Figure 8 This is a schematic diagram of another laser structure provided in the embodiments of this application. Figure 8 It can beFigure 5 and Figure 6 The diagram shows a cross-section b-b' in the laser, and Figure 8 The propagation mode of laser light emitted by the second type of light-emitting chip is illustrated. For example... Figure 8 As shown, after the second type of light-emitting chip 202b emits laser light, the laser propagates towards the corresponding reflecting prism 203. The propagation direction of the laser is parallel to direction x2, and the polarization direction of the laser is parallel to the base plate 201 and perpendicular to the laser propagation direction x2. The polarization direction of the laser is perpendicular to the plane of the paper. It should be noted that... Figure 8 The direction perpendicular to the paper is Figure 5 , Figure 6 and Figure 7 Since the polarization direction of the laser is parallel to the x2 direction, and the laser beam is reflected from the reflective surface of the prism 203 and propagates away from the base plate 2011, the polarization direction of the laser remains unchanged and is still parallel to the y2 direction. Therefore, the polarization polarity of the laser beam has not changed.

[0045] Combination Figure 7 and Figure 8 As can be seen, in the embodiments of this application, the lasers emitted by the first type of light-emitting chip 202a and the second type of light-emitting chip 202b have the same polarization direction after exiting the laser, and the polarization direction is parallel to the y2 direction. Therefore, the laser 20 can emit lasers with the same polarization direction.

[0046] It should be noted that, in this embodiment of the application, the laser 20 includes 12 light-emitting chips as an example for illustration. Optionally, the number of light-emitting chips in the laser 20 can also be 16, 12 or other numbers, and this embodiment of the application does not limit it.

[0047] In summary, in the laser provided in this application embodiment, the light-emitting chips in the first and second light-emitting components have perpendicular light-emitting directions. The lasers emitted by the light-emitting chips in both components are polarized in the same direction after reflection by a reflecting prism; that is, the laser emits laser light with only one polarization direction. Therefore, when this laser is used as the light source for a projection device, light with only one polarization direction can be directly used to form the projected image, avoiding color distortion and improving the display effect.

[0048] In addition, in this embodiment, the polarization direction of the laser emitted by the laser is the same, which solves the problem of color deviation in the projected image from the source. Therefore, it is not necessary to add a half-wave plate to the projection device to adjust the polarization direction of the laser, nor is it necessary to set up a large fixing device for fixing the half-wave plate, which is conducive to the miniaturization of the projection device.

[0049] Please continue to refer to this. Figure 5 to Figure 8 The laser 20 may further include multiple heat sinks 204, and each light-emitting component may also include one heat sink. The light-emitting chip in each light-emitting component can be mounted on the base plate 2011 via the heat sink 204; that is, the heat sink 204 is mounted on the base plate 2011, and the light-emitting chip is mounted on the surface of the heat sink 204 away from the base plate 2011. Optionally, the heat sink may have a high thermal conductivity, thereby quickly dissipating the heat generated by the light-emitting chip when it emits light, preventing damage to the light-emitting chip. For example, the material of the heat sink may include one or more of aluminum nitride and silicon carbide. Optionally, the material of the base plate may include one or more of oxygen-free copper and Kovar. When the base plate material includes oxygen-free copper, since oxygen-free copper also has a high thermal conductivity, the base plate can assist the heat sink in conducting the heat generated by the light-emitting chip. Optionally, the thickness of the base plate may range from 1 mm to 3 mm.

[0050] In this embodiment, the multiple light-emitting components in the laser can be arranged in various specific ways. Three of these arrangements are described below as examples:

[0051] In the first arrangement of the light-emitting components, the multiple light-emitting components arranged in multiple rows and columns in the laser may include multiple rows of first light-emitting components and multiple rows of second light-emitting components, and the first light-emitting components and the second light-emitting components are respectively located in two different staggered regions within the accommodating space of the housing. For example... Figure 5 and Figure 6 As shown, the laser contains multiple light-emitting components, including two rows of first light-emitting components and two rows of second light-emitting components. The first light-emitting components are located in a first region Q1 on the bottom surface M of the accommodating space, and the second light-emitting components are located in a second region Q2 on the bottom surface M. These two regions are independent of each other and do not overlap. For example, these two regions can be located on opposite sides of the center line of the bottom surface. It should be noted that this embodiment of the application takes the arrangement of the first region Q1 and the second region Q2 along the y2 direction as an example. Optionally, these two regions can also be arranged along the x2 direction, and this embodiment of the application is not limited. Optionally, the number of rows of light-emitting chips in the laser can be in the range of 3 to 5, which can avoid the laser size from being too large and is conducive to the miniaturization of the laser.

[0052] Optionally, the boundary shapes of the first and second regions can be congruent, meaning the first and second regions have the same dimensions. For example, the bottom surface M can be divided into two equal regions, which are the first and second regions. This ensures that the light-emitting chip in either region can be configured using the same method as in the other region, thus allowing the housing to be used for only one type of light-emitting chip, improving its versatility.

[0053] In the second arrangement of the light-emitting components, the light-emitting components arranged in multiple rows and columns in the laser may include: multiple rows of first light-emitting components and multiple rows of second light-emitting components arranged alternately along the column direction. For example, Figure 9 This is a schematic diagram of the structure of a laser provided in another embodiment of this application. Figure 9 As shown, the light-emitting components in the laser 20 are arranged in four rows and four columns, including two rows of first light-emitting components and two rows of second light-emitting components. The first and second light-emitting components are arranged alternately along the column direction (i.e., the y2 direction). For example, in the order from top to bottom (i.e., the opposite direction of the y2 direction), all light-emitting components in the first row are first light-emitting components, all light-emitting components in the second row are second light-emitting components, all light-emitting components in the third row are first light-emitting components, and all light-emitting components in the fourth row are second light-emitting components. Optionally, the light-emitting components in odd-numbered rows can all be second light-emitting components, and the light-emitting components in even-numbered rows can all be first light-emitting components. This embodiment of the application does not limit this.

[0054] In the third arrangement of the light-emitting components, the laser emitters are arranged in multiple rows and columns. Each row of light-emitting components includes alternating first and second light-emitting components, or alternating pairs of first and second light-emitting components. Each column of light-emitting components also includes alternating first and second light-emitting components, or alternating pairs of first and second light-emitting components. It should be noted that this arrangement can further include four specific arrangements: the first is where both the row and column of light-emitting components include alternating first and second light-emitting components; the second is where both the row and column of light-emitting components include alternating pairs of first and second light-emitting components; the third is where each row and column of light-emitting components includes alternating pairs of first and second light-emitting components, and the fourth is where each row and column of light-emitting components includes alternating pairs of first and second light-emitting components. In the embodiments of this application, the alternating arrangement of two objects (such as A and B) along a certain direction means that two A objects are arranged along that direction, then two B objects are arranged, then two A objects are arranged, and so on.

[0055] The following illustrations only show the first and third of these four specific arrangement methods. For example, Figure 10 This is a schematic diagram of another laser structure provided in another embodiment of this application. Figure 11 This is a schematic diagram of another laser structure provided in another embodiment of this application. Figure 10 The first of the four specific arrangement methods described above is illustrated. Figure 11 The third of the four specific arrangement methods described above is illustrated below. Figure 10 and 11 Taking the arrangement of the light-emitting components in laser 20 in a four-row, six-column configuration as an example. Figure 10 As shown, in each row of light-emitting components, the (2i-1)th light-emitting component is the first light-emitting component, and the 2ith light-emitting component is the second light-emitting component. In each column of light-emitting components, the (2i-1)th light-emitting component is the first light-emitting component, and the 2ith light-emitting component is the second light-emitting component, where i ≥ 1, that is, 2i-1 is an odd number, and 2i is an even number. Figure 10 In each row of LEDs, the first, third, and fifth LEDs are designated as the first LEDs, and the second, fourth, and sixth LEDs are designated as the second LEDs. Similarly, in each column of LEDs, the first and third LEDs are designated as the first LEDs, and the second and fourth LEDs are designated as the second LEDs. For example... Figure 11 As shown, in each row of light-emitting components, the (4i-3)th and (4i-2)th light-emitting components are the first light-emitting components, and the (4i-1)th and 4ith light-emitting components are the second light-emitting components; in each column of light-emitting components, the (2i-1)th light-emitting component is the first light-emitting component, and the 2ith light-emitting component is the second light-emitting component. For example... Figure 11 In each row of light-emitting components, the first, second, fifth, and sixth light-emitting components are the first light-emitting components, and the third and fourth light-emitting components are the second light-emitting components; in each column of light-emitting components, the first and third light-emitting components are the first light-emitting components, and the second and fourth light-emitting components are the second light-emitting components.

[0056] It should be noted that for the lasers with the second and third arrangements of the light-emitting components mentioned above, the first light-emitting component is evenly and dispersed within the housing, and the second light-emitting component is also evenly and dispersed within the housing. This ensures that even if only the first or only the second light-emitting component emits light, the overall size of the emitted laser spot is only slightly different from the spot size when all light-emitting components are emitting light, thus ensuring the stability of the laser's emitted spot size. Furthermore, the mixing effect of the laser emitted by the first and second light-emitting components is good, resulting in high uniformity of the emitted laser.

[0057] In this embodiment, the light-emitting chips in the laser can be arranged based on the structure of the housing. For example, please refer to...Figure 5 The bottom surface M of the accommodating space of the housing 201 may have a target edge. The light emission direction of the first type of light-emitting chip 202a is parallel to the target edge, and the light emission direction of the second type of light-emitting chip 202b is perpendicular to the target edge. For example, the bottom surface is rectangular, and the target edge is the long side of the rectangle. The target edge can also be the short side of the rectangle; this application embodiment does not limit this. In the accompanying drawings of this application embodiment, the light emission direction of the light-emitting chip is related to the target edge of the bottom surface as an example. Optionally, the light emission direction of the light-emitting chip may also be independent of the shape of the bottom surface and the target edge, as long as the light emission direction of the first type of light-emitting chip is perpendicular to the light emission direction of the second type of light-emitting chip.

[0058] For example, in the first arrangement of the light-emitting components described above, the row direction of the light-emitting chips is perpendicular to the target edge, and the arrangement direction of the first region Q1 and the second region Q2 is parallel to the target edge of the bottom surface. In this embodiment of the application, the arrangement direction of the first region Q1 and the second region Q2 can also be perpendicular to the target edge of the bottom surface; this embodiment of the application does not impose any limitation. Please continue to refer to... Figure 5 and Figure 6 In this embodiment, the first type of light-emitting chip 202a and the second type of light-emitting chip 202b can also be arranged in multiple rows and columns, with the row and column directions of the light-emitting chips being the same as the row and column directions of the light-emitting components. The number of columns of the first type of light-emitting chip 202a can be equal to the number of columns of the second type of light-emitting chip 202b, and the multiple columns of the first type of light-emitting chip 202a can correspond one-to-one with the multiple columns of the second type of light-emitting chip 202b. The distance between each column of the first type of light-emitting chip 202a and the corresponding column of the second type of light-emitting chip 202b in the row direction is less than a distance threshold, that is, the distance between each column of the first type of light-emitting chip 202a and the corresponding column of the second type of light-emitting chip 202b in the row direction is relatively close. The centers of the light spots formed by the laser emitted by each column of the first type of light-emitting chip 202a and the laser emitted by the corresponding column of the second type of light-emitting chip 202b after reflection by the reflecting prism 203 can be collinear.

[0059] In this embodiment, the laser spots formed by the lasers emitted by multiple light-emitting components in the laser can be arranged in multiple rows and columns. The centers of the spots in each row can be collinear, and the centers of the spots in each column can also be collinear. Each row of spots is formed by the lasers emitted by one row of light-emitting components, and each column of spots is formed by the lasers emitted by one column of light-emitting components. That is, the centers of the laser spots formed after reflection by the light-emitting chips in each row of light-emitting components are collinear, and the centers of the laser spots formed after reflection by the light-emitting chips in each column of light-emitting components are collinear.

[0060] For example, Figure 12 This is a schematic diagram of a laser spot formed by a laser emitted from a laser, provided in an embodiment of this application. Figure 12Taking the arrangement of the light-emitting components in this laser based on the first arrangement method described above as an example. For example... Figure 12 As shown, the laser emitted by the laser forms multiple light spots arranged in multiple rows and columns. Each light spot is formed by the reflection of the laser emitted by a light-emitting chip on a reflecting prism. Figure 12 The first two rows of light spots can be the light spots formed by the reflection of the laser emitted by the first type of light-emitting chip on the reflecting prism. The last two rows of light spots can be the light spots formed by the reflection of the laser emitted by the second type of light-emitting chip on the reflecting prism. Each column of light spots can be the light spot formed by a column of lasers emitted by the first type of light-emitting chip and a corresponding column of lasers emitted by the second type of light-emitting chip. For example... Figure 12 As shown, the centers of multiple spots in each column can be collinear, and the centers of multiple spots in each row can also be collinear; for example, the centers of the first column of spots can all be located on straight line g1, and the centers of the first row of spots can all be located on straight line g2. This ensures that the laser emitted by the laser is relatively focused, facilitates the mixing of the emitted laser light, and ensures high uniformity of the emitted laser light.

[0061] It should be noted that the center of each light spot and the center of the laser-injected area on the reflecting prism are located on the same vertical line. Therefore, the collinearity of the centers of the laser-injected areas on the reflecting prisms of each row of light-emitting components ensures that the centers of the light spots formed by the laser emitted by that row of light-emitting components are collinear; similarly, the collinearity of the centers of the laser-injected areas on the reflecting prisms of each column of light-emitting components ensures that the centers of the light spots formed by the laser emitted by that column of light-emitting components are collinear. In this embodiment, when mounting the reflecting prisms, the position of the reflecting prism corresponding to each light-emitting chip can be adjusted to ensure that the centers of the laser-injected areas on the reflecting prisms of each row of light-emitting components, as well as the centers of the laser-injected areas on the reflecting prisms of each column of light-emitting components, are collinear.

[0062] In this embodiment, the size of the light spot formed by the laser emitted by the first type of light-emitting chip can be larger than the size of the light spot formed by the laser emitted by the second type of light-emitting chip. Please refer to [further details omitted]. Figure 12The laser emitted by the light-emitting chip forms an elliptical spot, with the major axis of the ellipse parallel to the light-emitting direction of the chip and the minor axis perpendicular to it. The red laser emitted by the first type of light-emitting chip forms a larger spot, while the green and blue lasers emitted by the second type of light-emitting chip form smaller spots. In this embodiment, the arrangement direction of the first region Q1 and the second region Q2 is parallel to the target edge of the bottom surface, and the light-emitting direction of the first type of light-emitting chip 202a is parallel to the target edge, while the light-emitting direction of the second type of light-emitting chip 202b is perpendicular to the target edge. Therefore, the arrangement direction of the first region Q1 and the second region Q2 is parallel to the light-emitting direction of the first type of light-emitting chip. Consequently, the major axis of the laser spot formed by the first type of light-emitting chip 202a is parallel to the target edge, and the minor axis is perpendicular to it; similarly, the major axis of the laser spot formed by the second type of light-emitting chip 202b is perpendicular to the target edge, and the minor axis is parallel to it. In the direction perpendicular to the target edge (i.e., the x2 direction), the size of the laser spot formed by the laser emitted by the first type of light-emitting chip 202a (i.e., the minor axis width of the spot) is relatively small compared to the size of the laser spot formed by the laser emitted by the second type of light-emitting chip 202b (i.e., the major axis width of the spot). This ensures that the laser spot emitted by the laser is relatively uniformly distributed, guaranteeing high uniformity of the emitted laser.

[0063] Optionally, the number of first-type light-emitting chips 202a in the laser can be equal to the number of second-type light-emitting chips 202b, and the number of rows of the first-type light-emitting chips 202a can be equal to the number of rows of the second-type light-emitting chips 202b. For example, in the embodiments of this application... Figure 5 and 6 As shown, the laser may include six first-type light-emitting chips 202a and six second-type light-emitting chips 202b, with the six first-type light-emitting chips 202a arranged in two rows and the six second-type light-emitting chips 202b also arranged in two rows. Both rows of first-type light-emitting chips 202a can be used to emit red laser light, and the two rows of second-type light-emitting chips 202a may include one row for emitting blue laser light and one row for emitting green laser light. Since the laser emitter needs to mix light to obtain white light, a 2:1:1 ratio of red, green, and blue laser light can be mixed to obtain white light. Therefore, two rows of light-emitting chips can be set up to emit red laser light, one row for emitting blue laser light, and one row for emitting green laser light. Optionally, when the laser emitted by the laser needs to meet the requirements of other colors, the number of different light-emitting chips can be adjusted accordingly. For example, two rows of light-emitting chips for emitting green lasers can be set; or light-emitting chips for emitting lasers of other colors can be set, such as light-emitting chips for emitting yellow lasers. This application embodiment does not limit the scope of the application.

[0064] In this embodiment, the light-emitting chip is strip-shaped, and the light-emitting direction of the light-emitting chip is the same as the extension direction of the light-emitting chip (i.e., the length direction of the strip). Furthermore, the arrangement direction of the light-emitting chip and the reflecting prism in the light-emitting component is also the same as the light-emitting direction of the light-emitting chip. For the first arrangement of the light-emitting component described above, where both the first and second types of light-emitting chips are arranged in multiple rows and columns, since the light-emitting direction of the first type of light-emitting chip 202b is perpendicular to its row direction, and the light-emitting direction of the second type of light-emitting chip 202b is parallel to its row direction, in the row direction, the area occupied by each column of second light-emitting chips 202b is wider than the area occupied by each column of first light-emitting chips 202a. Therefore, the column spacing of the first type of light-emitting chips 202a can be greater than the column spacing of the second type of light-emitting chips 202b. The row spacing of the light-emitting chips in the laser can be equal, such as the spacing between two adjacent rows of first-type light-emitting chips 202a and the spacing between two adjacent rows of second-type light-emitting chips 202b. The spacing between first-type light-emitting chips 202a and second-type light-emitting chips 202b in an adjacent row can also be equal. Optionally, the row spacing of the first-type light-emitting chips and the row spacing of the second-type light-emitting chips can also be unequal, such as the row spacing of the first-type light-emitting chips being less than the row spacing of the second-type light-emitting chips.

[0065] Optionally, since each light-emitting chip is mounted on a corresponding heat sink and then fixed to the substrate, such as a light-emitting chip being mounted in the middle of a corresponding heat sink, the heat sinks corresponding to the first type of light-emitting chip and the second type of light-emitting chip in this embodiment can be arranged in multiple rows and columns. In this embodiment, the distance between the heat sinks can be used to characterize the distance between the light-emitting chips. For example, the heat sink is rectangular, with its length direction being the same as the length direction of the light-emitting chip mounted on it, and its width direction being the same as the width direction of the light-emitting chip mounted on it. The length of the heat sink can range from 1.7 mm to 2.7 mm, and its width can range from 1.4 mm to 2.4 mm. The column spacing of the heat sinks corresponding to the first type of light-emitting chip can range from 3.6 mm to 6.6 mm, and the column spacing of the heat sinks corresponding to the second type of light-emitting chip can range from 3.3 mm to 6.3 mm; the row spacing of the heat sinks corresponding to the first type of light-emitting chip can range from 3.3 mm to 6.3 mm, and the row spacing of the heat sinks corresponding to the second type of light-emitting chip can range from 1.6 mm to 6.6 mm.

[0066] It should be noted that the foregoing description uses the example of the row and column spacing of the first and second type of light-emitting chips satisfying certain conditions to illustrate the position of the light-emitting chips. Optionally, the spacing between the light-emitting centers of the light-emitting chips can also satisfy certain conditions, and the position of each light-emitting chip can be determined based on these conditions. Each light-emitting chip has a light-emitting port, from which the laser emitted by the chip exits. The center point of this light-emitting port is the light-emitting center of the chip. For example, in the row direction, the distance between the light-emitting centers of two adjacent first-type light-emitting chips is equal to the distance between the light-emitting centers of two adjacent first-type light-emitting chips, such as a distance ranging from 6 mm to 8 mm. This ensures that the laser emitted by each column of first-type light-emitting chips and the laser emitted by the corresponding column of second-type light-emitting chips form collinear light spots after reflection by a reflecting prism. For example, in the column direction, the distance between the light-emitting centers of two adjacent first-type light-emitting chips can be equal to or unequal to the distance between the light-emitting centers of two adjacent second-type light-emitting chips. For instance, the distance between the light-emitting centers of two adjacent first-type light-emitting chips in the column direction can range from 6 mm to 8 mm, and the distance between the light-emitting centers of two adjacent second-type light-emitting chips in the column direction can also range from 3 mm to 8 mm. In this embodiment, the larger distance between adjacent light-emitting chips ensures better heat dissipation during light emission, preventing heat accumulation that could damage the light-emitting chips.

[0067] Optionally, in the embodiments of this application, for the first arrangement of the light-emitting chips, the light-emitting chips in each row of the first light-emitting components have the same light-emitting direction and are all perpendicular to the row direction, and the reflective prism in each row of the first light-emitting components is integrally formed; the light-emitting chips in each column of the second light-emitting components have the same light-emitting direction and are all parallel to the row direction, and the reflective prism in each column of the second light-emitting components is integrally formed. For example, the reflective prism can be strip-shaped, and each reflective prism can correspond to multiple light-emitting chips. The light-emitting directions of these multiple light-emitting chips are all the same, and the light-emitting direction is parallel to the extension direction (i.e., the length direction) of the reflective prism. Thus, only one pasting process is needed for the reflective prisms corresponding to multiple light-emitting chips, eliminating the need to paste the reflective prisms corresponding to each light-emitting chip separately, reducing the laser fabrication process and lowering the complexity of laser fabrication. Figure 13 This is a schematic diagram of another laser structure provided in another embodiment of this application, as shown below. Figure 13As shown, the light emission direction of the light-emitting chips in each row of the first light-emitting component is the y2 direction, and the reflective prism in each row of the first light-emitting component is integrally formed as a strip-shaped reflective prism. The light emission direction of the light-emitting chips in each column of the second light-emitting component is the x2 direction, and the reflective prism in each column of the second light-emitting component is integrally formed as a strip-shaped reflective prism. That is, each row of the first type of light-emitting chip 202a corresponds to one reflective prism 203, and the light emission direction (i.e., the y2 direction) of each row of the first type of light-emitting chip 202a is perpendicular to the extension direction (i.e., the x2 direction) of the corresponding reflective prism 203. Each column of the second type of light-emitting chip 202b corresponds to one reflective prism 203, and the light emission direction (i.e., the x2 direction) of each column of the second type of light-emitting chip 202b is perpendicular to the extension direction (i.e., the y2 direction) of the corresponding reflective prism 203. Optionally, in a row of the first type of light-emitting chips, only two adjacent light-emitting chips may correspond to the same reflective prism, or three adjacent light-emitting chips may correspond to the same reflective prism; this embodiment of the application is not limited to this.

[0068] Figure 14 This is a schematic diagram of the structure of a laser provided in another embodiment of this application. For example... Figure 14 As shown, the laser 20 may further include a sealing cover 205, a sealing light-transmitting layer 206, and a collimating lens assembly 207. The sealing cover 205 is annular, and its outer edge is fixed to the surface of the shell wall 2012 away from the bottom plate 2011. The sealing light-transmitting layer 206 is located on the side of the sealing cover 205 away from the bottom plate 2011, and its edge is fixed to the inner edge of the sealing cover 205. The shell 201, the sealing cover 205, and the light-transmitting sealing layer 206 can form a sealed space, within which the light-emitting chip and the reflecting prism in the laser 20 can be located. Optionally, the sealed space can be filled with an inert gas, such as nitrogen, to protect the light-emitting chip and prevent it from being oxidized. The collimating lens assembly 207 is located on the side of the light-transmitting sealing layer 206 away from the bottom plate 2011, and its edge is fixed to the outer edge of the sealing cover 205 away from the bottom plate 2011. Optionally, the collimating lens assembly 207 can be fixed by adhesive or mechanical fixation. The collimating lens assembly 207 includes multiple collimating lenses T corresponding one-to-one with each light-emitting chip in the laser. The laser emitted by each light-emitting chip, after being reflected by the corresponding reflecting prism 203, can be directed towards the corresponding collimating lens T, which then collimates the laser before it is emitted. It should be noted that collimating the light rays is equivalent to converging them to a certain extent, reducing the divergence angle and making the light rays closer to parallel light.

[0069] In the embodiments of this application, such as Figure 14As shown, the collimating lenses corresponding to the first type of light-emitting chip 202a in the collimating lens group 207 can be integrally formed, and the collimating lenses corresponding to the second type of light-emitting chip 202b can also be integrally formed. For example, the collimating lens group 207 may include a first lens group 2071 and a second lens group 2072 that are independent of each other. The first lens group includes the collimating lenses corresponding to the first type of light-emitting chip 202a, and the second lens group 2072 includes the collimating lenses corresponding to the second type of light-emitting chip 202b. This allows for the coupling of the laser emitted by the first type of light-emitting chip and the laser emitted by the second type of light-emitting chip separately, ensuring that the laser emitted by the first type of light-emitting chip can accurately enter the corresponding collimating lens in the first lens group, and also ensuring that the laser emitted by the second type of light-emitting chip can accurately enter the corresponding collimating lens in the second lens group.

[0070] Furthermore, the structural shapes of the first and second lens groups can be designed separately, increasing the fabrication flexibility of the collimating lens group. For example, the shape of the collimating lens can be designed according to the shape of the light spot incident on each collimating lens, such as... Figure 12 As shown, the shape of the light spot can be elliptical, which makes the orthographic projection of the collimating lens on the base plate rectangular, ensuring that the collimating lens can collect all the incident laser light while maintaining a small size. Each collimating lens includes a first surface and a second surface, where the first surface is a rectangular plane closer to the base plate than the second surface, and the second surface is a convex arc surface farther from the base plate than the first surface. Figure 12 In the collimating lens group shown, which matches the light spot, the long side of the first surface of the collimating lens in the first lens group is parallel to the y2 direction, and the short side is parallel to the x2 direction; the long side of the first surface of the collimating lens in the second lens group is parallel to the x2 direction, and the short side is parallel to the y2 direction. This design can also be called a vertical arrangement of collimating lenses in the first lens group and a horizontal arrangement of collimating lenses in the second lens group.

[0071] In this embodiment, the thickness of the outer edge of the sealing cover 205 can be less than a preset thickness threshold. This thin outer edge can be fixed to the surface of the shell wall 2012 away from the bottom plate using parallel sealing welding technology. The sealing cover 205 can be a sheet metal part, and the thickness of each position of the sealing cover 205 is the same or approximately the same. It should be noted that when fixing the outer edge of the sealing cover 205 to the shell wall 2012 using parallel sealing welding technology, the sealing cover 205 is first placed on the side of the shell wall 2012 away from the bottom plate 2011, with the outer edge of the sealing cover 205 overlapping the surface of the shell wall 2012 of the tube shell 201 away from the bottom plate 2011. Then, the outer edge needs to be heated using sealing welding equipment to melt the connection between the outer edge and the shell wall 2012, thereby welding the outer edge to the shell wall 2012 of the tube shell 201 together. Optionally, before fixing the sealing cover 205 to the tube shell 201, the light-transmitting sealing layer 206 can be fixed to the sealing cover 205 first. For example, the edge of the light-transmitting sealing layer 206 can be fixed to the inner edge of the sealing cover 205 with sealant.

[0072] In this embodiment, the casing material can be copper, such as oxygen-free copper; the light-transmitting sealing layer material can be glass; and the sealing cover material can be stainless steel. It should be noted that copper has a high thermal conductivity. The casing material in this embodiment is copper, which ensures that the heat generated by the light-emitting chip on the base plate of the casing during operation can be quickly conducted through the casing and dissipated, preventing heat accumulation and damage to the light-emitting chip. Optionally, the casing material can also be one or more of aluminum, aluminum nitride, and silicon carbide. The sealing cover material in this embodiment can also be other Kovar materials, such as iron-nickel-cobalt alloys or other alloys. The light-transmitting sealing layer material can also be other light-transmitting and reliable materials, such as resin materials.

[0073] Please continue to refer to this. Figure 5 , 6 8-11 and 13, the shell wall 2012 may have multiple openings on opposite sides. The laser 20 may also include multiple conductive pins 208, which can extend through the openings in the shell wall 2012 into the receiving space of the tube shell 201, and thus be fixed to the shell wall 2012. The conductive pins 208 can be electrically connected to the electrodes of the light-emitting chip to transmit external power to the light-emitting chip, thereby exciting the light-emitting chip to emit laser light. Optionally, the aperture of the opening can be 1.2 mm, and the diameter of the conductive pins 208 can be 0.55 mm.

[0074] Optionally, in the embodiments of this application, when assembling the laser, an annular solder structure (such as an annular glass bead) can be placed in the opening on the shell wall of the tube first, and the conductive pins can be passed through the solder structure and the opening where the solder structure is located. Then, the shell wall is placed around the perimeter of the base plate, and an annular silver-copper solder is placed between the base plate and the tube. Next, the structure of the base plate, shell wall and conductive pins is placed in a high-temperature furnace for sealing sintering. After sealing sintering and curing, the base plate, shell wall, conductive pins and solder can be integrated into a whole, thereby achieving airtightness at the opening of the shell wall. Alternatively, the light-transmitting sealing layer can be fixed to the sealing cover plate, such as by attaching the edge of the light-transmitting sealing layer to the inner edge of the sealing cover plate to obtain the upper cover assembly. Next, the light-emitting chip and heat sink assembly, along with the reflecting prism, can be welded to the base plate of the housing. Then, the upper cover assembly is welded to the surface of the housing wall away from the base plate using parallel sealing technology. Finally, the collimating lens assembly is optically coupled and fixed to the side of the upper cover assembly away from the base plate using epoxy adhesive, thus completing the laser assembly. It should be noted that the above assembly process is only an exemplary process provided by the embodiments of this application. The welding process used in each step can be replaced by other processes, and the order of each step can also be adjusted. This application embodiment does not limit this.

[0075] It should be noted that the above embodiments in this application are all described using the bottom plate and shell wall as two separate structures to be assembled. Optionally, the bottom plate and shell wall can also be integrally formed. This can avoid wrinkles on the bottom plate caused by the difference in thermal expansion coefficients between the bottom plate and shell wall during high-temperature welding, thereby ensuring the flatness of the bottom plate, ensuring the reliability of the light-emitting chip on the bottom plate, and ensuring that the light emitted by the light-emitting chip is emitted at a predetermined emission angle, thus improving the light emission effect of the laser.

[0076] In summary, in the laser provided in this application embodiment, the light emission directions of the first type of light-emitting chip and the second type of light-emitting chip are perpendicular, and the lasers emitted by the first type of light-emitting chip and the second type of light-emitting chip have the same polarization direction after being reflected by the reflecting prism. That is, the laser emits laser light with only one polarization direction. In this way, when using this laser as the light source of a projection device, light with only one polarization direction can be directly used to form a projected image, avoiding color distortion in the projected image and improving the display effect of the projected image.

[0077] Figure 15 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application. For example... Figure 15As shown, the projection device may include a laser 20, an optical engine 30, and a lens 40. The laser 20 emits light to the optical engine 30, which modulates the incoming light and directs it towards the lens 40. The lens 40 projects the incoming light. The laser 20 can be any of the lasers described above. Because the lasers emitted by the laser 20 have a consistent polarization direction, a projection device using this laser as a light source can form a projected image with good display quality based on this consistent polarization direction.

[0078] Optionally, the optical engine may include a lens group, a total internal reflection prism (TIR) ​​prism group, and a light modulation component. Light emitted from the light source assembly passes sequentially through the lens group, the TIR prism group, and the light modulation component before exiting through the lens. The light-emitting surface of the light guide and the light-incident surface of the light modulation device have a conjugate object-image relationship. The light modulation component can be a liquid crystal on silicon (LCOS), a liquid crystal display (LCD), or a digital micromirror device (DMD).

[0079] It should be noted that, in the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise explicitly defined. "Approximately" means within an acceptable margin of error, meaning that those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error. In the accompanying drawings, the dimensions of layers and regions may be exaggerated for clarity. It is also understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on other elements, or there may be intermediate layers. Similar reference numerals throughout indicate similar elements.

[0080] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A laser, characterized in that, The laser includes: a tube shell with an opening on one side, and a plurality of light-emitting components located in the accommodating space of the tube shell and arranged in multiple rows and columns; The light-emitting component includes a light-emitting chip and a reflecting prism. The light-emitting chip is used to emit laser light into the reflecting prism, and the reflecting prism is used to reflect the laser light into the opening. The plurality of light-emitting components include: a first light-emitting component and a second light-emitting component, wherein the polarization direction of the light emitted by the first light-emitting component and the second light-emitting component is perpendicular, the light-emitting chip in the first light-emitting component is perpendicular to the light-emitting chip in the second light-emitting component, and the polarization direction of the laser emitted by the light-emitting chip in the first light-emitting component and the light-emitting chip in the second light-emitting component is the same after being reflected by the reflecting prism. The plurality of light-emitting components satisfy any of the following conditions: The plurality of light-emitting components include: multiple rows of first light-emitting components and multiple rows of second light-emitting components arranged alternately along the column direction; Alternatively, in the plurality of light-emitting components, each row of light-emitting components includes a first light-emitting component and a second light-emitting component arranged alternately one by one or two by two, and each column of light-emitting components includes a first light-emitting component and a second light-emitting component arranged alternately one by one or two by two. Alternatively, the plurality of light-emitting components may include: multiple rows of the first light-emitting components and multiple rows of the second light-emitting components, wherein the first light-emitting components and the second light-emitting components are respectively located in two different areas staggered in the accommodating space.

2. The laser according to claim 1, characterized in that, The plurality of light-emitting components include: multiple rows of first light-emitting components and multiple rows of second light-emitting components, wherein the first light-emitting components and the second light-emitting components are respectively located in two different areas staggered in the accommodating space; In each row of the first light-emitting component, the light-emitting chip has the same light emission direction and is perpendicular to the row direction; the reflective prism is integrally formed. In each column of the second light-emitting component, the light-emitting chip has the same light emission direction and is parallel to the row direction, and the reflective prism is integrally formed.

3. The laser according to claim 1 or 2, characterized in that, The plurality of light-emitting components include: multiple rows of first light-emitting components and multiple rows of second light-emitting components, wherein the first light-emitting components and the second light-emitting components are respectively located in two different regions staggered in the accommodating space; the boundary shape of the two different regions is a congruent figure.

4. The laser according to claim 1 or 2, characterized in that, In the plurality of light-emitting components arranged in multiple rows and columns, the centers of the light spots formed by the laser emitted by the light-emitting chips in each row of light-emitting components after being reflected by the reflective prism are collinear, and the centers of the light spots formed by the laser emitted by the light-emitting chips in each column of light-emitting components after being reflected by the reflective prism are collinear.

5. The laser according to claim 1 or 2, characterized in that, In the first light-emitting component, the light-emitting chip emits light in a direction parallel to the target side of the bottom surface of the accommodating space. In the second light-emitting component, the light-emitting chip emits light in a direction perpendicular to the target side. The bottom surface of the accommodating space is opposite to the opening.

6. The laser according to claim 1 or 2, characterized in that, The light-emitting chips in the first light-emitting component are all used to emit red laser light, and the light-emitting chips in the second light-emitting component include: a light-emitting chip for emitting green laser light and a light-emitting chip for emitting blue laser light.

7. A projection device, characterized in that, The projection device includes: a laser as described in any one of claims 1 to 6, as well as an optical engine and a lens.

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