Light source apparatus and optical imaging system

Abstract

The present application discloses a light source apparatus and an optical imaging system. The light source apparatus may comprise a laser module, an LED module and an adjustable light combining module. The laser module is used for generating specified laser, and the LED module is used for generating specified light. The adjustable light combining module is provided with an adjustable light transmitting region allowing specified light to pass through, and the adjustable light combining module is disposed on optical paths where the specified laser and the specified light are located, and is used for combining the specified laser and the specified light to generate emergent light. The adjustable light transmitting region is used for adjusting the content of the specified light in the emergent light. According to the present application, the size of the adjustable light transmitting region in the adjustable light combining module is changed by means of mechanical adjustment, so as to adjust the color gamut of the emergent light. Compared with the prior art, there is no need to use a controller having good hardware performance, so that the hardware costs of the light source apparatus can be reduced.

Description

Light source device and optical imaging system Technical Field

[0001] The present application relates to the field of optical imaging technology, and more specifically, to a light source device and an optical imaging system. Background Art

[0002] In existing optical engines that combine laser and fluorescent light (e.g., LED light), extended light combining is typically used to combine the laser and fluorescent light to form the output light. Because the laser and fluorescent light have different spectra and color gamuts, dynamic adjustment of the color gamut of the output light can be achieved by adjusting the corresponding parameters of the laser and fluorescent light (e.g., intensity, duty cycle). For example, a controller can send control signals to the corresponding light source generators of the laser and fluorescent light to achieve these parameter adjustments.

[0003] However, when adjusting the color gamut of the emitted light, the control signal needs to be switched and output quickly and accurately. Therefore, the above solution has high requirements on the hardware performance of the controller in the optical engine.

[0004] Utility Model Content

[0005] Embodiments of the present application provide a light source device and an optical imaging system.

[0006] According to the first aspect of the present application, an embodiment of the present application provides a light source device, which may include a laser module, an LED module, and an adjustable light combining module. The laser module is used to generate a specified laser, and the LED module is used to generate a specified light. The adjustable light combining module is provided with an adjustable light-transmitting area that allows the specified light to pass through; the adjustable light combining module is arranged on the optical path where the specified laser and the specified light are located, and is used to combine the specified laser and the specified light to generate output light. The adjustable light-transmitting area is used to adjust the content of the specified light in the output light.

[0007] In some optional embodiments, the light source device further includes a controller, which is electrically connected to the adjustable light module and is used to adjust the size of the adjustable light-transmitting area to adjust the content of the specified light in the emitted light.

[0008] In some optional embodiments, the adjustable light combining module includes a first light combining component, which includes a first functional portion and a plurality of second functional portions. The plurality of second functional portions are arranged around the rotation center of the first light combining component at intervals; the second functional portion is used to reflect a specified laser, and the areas of at least two second functional portions are different; the first functional portion surrounds the periphery of the plurality of second functional portions and is used to transmit a specified light. When the first light combining component combines the specified laser and the specified light, one of the second functional portions is located on the optical path of the specified laser, and some of the first functional portions are located on the optical path of the specified light.

[0009] In some optional embodiments, the first light combining member includes a body and a plurality of reflective units; the surface of the body is divided into a first region and a plurality of second regions adjacent to each other, the plurality of second regions being arranged around a rotational center at intervals; the first region is arranged around the periphery of the plurality of second regions. The plurality of reflective units cover the plurality of second regions in a one-to-one correspondence to form a plurality of second functional portions, and at least two of the reflective units have different areas. The reflective units are configured to reflect a specified laser beam.

[0010] In some optional embodiments, the adjustable light combining module further includes a transmission component, which is disposed between the LED module and the first light combining component and is located on the light path where the designated light is located, and is used to transmit the designated light.

[0011] In some optional embodiments, the first light combining element further includes a transmission unit, which covers the first area to form the first functional portion, and is used to transmit designated light.

[0012] In some optional embodiments, the adjustable light combining module includes a second light combining component and a first adjustable aperture. The second light combining component is disposed in the optical path of the designated laser and the designated light, and is configured to combine the designated laser and the designated light. The first adjustable aperture is disposed in the optical path of the outgoing light and is provided with a first light-transmitting hole for allowing the outgoing light to pass through.

[0013] In some optional embodiments, the adjustable light combining module includes a second light combining component and a second adjustable aperture. The second light combining component is disposed in the optical path of the designated laser and the designated light, and is configured to combine the designated laser and the designated light. The second adjustable aperture is disposed in the optical path of the designated light and is provided with a second light-transmitting aperture for allowing the designated light to pass through.

[0014] In some optional embodiments, the laser module includes a laser unit and a scattering unit; the laser unit is used to generate a specified laser; and the scattering unit is arranged between the laser unit and the adjustable optical module and is located on the optical path of the specified laser.

[0015] In some optional embodiments, the scattering unit includes a scattering plate and a scattering wheel, and the scattering plate and the scattering wheel are sequentially arranged on the optical path where the laser is located.

[0016] According to a second aspect of the present application, an embodiment of the present application provides an optical imaging system, comprising the aforementioned light source device and a light modulator. The light source device is configured to generate outgoing light. The light modulator is disposed on an optical path of the outgoing light.

[0017] The present application provides a light source device and an optical imaging system. The light source device may include a laser module, an LED module, and an adjustable light combining module. The adjustable light combining module is arranged on the optical path of the designated laser generated by the laser module and the designated light generated by the LED module, and is used to combine the designated laser and the designated light to generate output light. Specifically, the adjustable light combining module is provided with an adjustable light-transmitting area, the adjustable light-transmitting area allows the designated light to pass through, and the adjustable light-transmitting area is used to adjust the content of the designated light in the output light. For example, the adjustable light-transmitting area can be a light-transmitting hole, and a mechanical structure (for example, a paddle transmission structure, a dial transmission structure) can be provided on the adjustable light combining module to adjust the size of the light-transmitting hole to adjust the content of the designated light in the output light. Specifically, when the light-transmitting hole is smaller, the light transmittance of the designated light is less. In this case, the content of the designated light in the output light is reduced, and the color gamut of the output light is increased. Conversely, when the light-transmitting hole is larger, the light transmittance of the designated light is greater. In this case, the content of the designated light in the output light is increased, and the color gamut of the output light is reduced.

[0018] Therefore, the present invention adopts mechanical adjustment to change the size of the adjustable light-transmitting area in the adjustable light-combining module to adjust the color gamut of the emitted light. Compared with the prior art, it does not require a controller with better hardware performance, which can reduce the hardware cost of the light source device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] FIG1 is a schematic structural diagram of a light source device provided in an embodiment of the present application.

[0021] FIG. 2 is a schematic structural diagram of a laser module in the light source device shown in FIG. 1 .

[0022] FIG3 is a schematic structural diagram of an LED module in the light source device shown in FIG1 .

[0023] FIG. 4 is another schematic structural diagram of the light source device shown in FIG. 1 .

[0024] FIG5 is a schematic structural diagram of the first light combining element in the light source device shown in FIG4 .

[0025] FIG6 is a schematic cross-sectional view of the first light combining element in the light source device shown in FIG4 .

[0026] FIG. 7 is another structural schematic diagram of the light source device shown in FIG. 1 .

[0027] FIG8 is a schematic structural diagram of the first adjustable aperture in the light source device shown in FIG7 .

[0028] FIG. 9 is a schematic diagram of another structure of the light source device shown in FIG. 1 .

[0029] FIG10 is a schematic structural diagram of an optical imaging system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0031] An embodiment of the present application provides a light source device 100, which is a hybrid light source formed by combining a laser light source and a fluorescent light source. It has the advantages of high light source brightness, simple optical path and low hardware cost. It can be widely used in projection equipment (for example, micro projectors, short-focus projectors, car-mounted micro projectors), laser TVs, engineering projectors, laser splicing walls and other equipment.

[0032] Referring to Figure 1, the light source device 100 may include a laser module 10, an LED module 20, and an adjustable light combining module 30. The laser module 10 is used to generate a specified laser L, and the LED module 20 is used to generate a specified light F. The adjustable light combining module 30 is arranged on the optical path where the specified laser L and the specified light F are located, and is used to combine the specified laser L and the specified light F to generate an output light O. Specifically, the adjustable light combining module 30 is provided with an adjustable light-transmitting area 310, which allows the specified light F to pass through. The adjustable light-transmitting area 310 is used to adjust the content of the specified light F in the output light O. For example, the adjustable light-transmitting area 310 can be a light-transmitting hole, and a mechanical structure (for example, a paddle transmission structure, a dial transmission structure) can be provided on the adjustable light combining module 30 to adjust the size of the light-transmitting hole. Specifically, the smaller the light-transmitting hole, the less light is transmitted through the specified light F. At this time, the content of the specified light F in the output light O is reduced, and the color gamut of the output light O is increased. On the contrary, when the light transmission hole is larger, the light transmission amount of the specified light F is greater. At this time, the content of the specified light F in the output light O increases, and the color gamut of the output light O decreases.

[0033] Therefore, the present application can adjust the color gamut of the output light O by mechanically adjusting the size of the adjustable light-transmitting area 310 in the adjustable light-combining module 30. Compared with the prior art, there is no need to use a controller 40 with better hardware performance, which can reduce the hardware cost of the light source device 100.

[0034] The various components of the light source device 100 are described in detail below.

[0035] In this embodiment, the laser module 10 is used to generate a designated laser L. Referring to Figure 2, the laser module 10 may include a laser unit 120 and a scattering unit 140, wherein the laser unit 120 may be used to generate the designated laser L. In some possible embodiments, the laser unit 120 may include one or more laser generators, each of which is used to generate a monochromatic laser. Exemplarily, the laser unit 120 may include a first laser generator, a second laser generator, and a third laser generator. The first laser generator may be used to generate a green laser, the second laser generator may be used to generate a blue laser, and the third laser generator may be used to generate a red laser, so that the designated laser L is a mixed laser of red, green, and blue. In some other possible embodiments, the laser unit 120 may be a broadband laser generator, which is electrically connected to the controller 40 and is used to generate a laser of a designated wavelength (i.e., the designated laser L) under the control of the controller 40.

[0036] The scattering unit 140 is disposed between the laser unit 120 and the adjustable optical module 30 and is located on the optical path of the designated laser light L. It is used to scatter the designated laser light L to eliminate speckle in the designated laser light L. The scattering unit 140 includes a scattering plate 141 and a scattering wheel 143, which are sequentially disposed on the optical path of the laser light. The controller 40 is also electrically connected to the scattering wheel 143 and is used to drive the scattering wheel 143 to rotate. Specifically, the scattering plate 141 and the laser unit 120 can be integrated into the same device to reduce the difficulty of installing the scattering plate 141. Therefore, by providing two scattering devices to eliminate speckle, this embodiment can further enhance the speckle elimination effect and improve the imaging quality of the optical imaging system 900 equipped with the light source device 100.

[0037] In some possible embodiments, the laser module 10 may further include a collimating lens assembly 160. The collimating lens assembly 160 is disposed between the laser unit 120 and the adjustable optical module 30 and is located in the optical path of the designated laser light L. The collimating lens assembly 160 is used to collimate the designated laser light L so that the designated laser light L enters the adjustable optical module 30 as substantially parallel light, thereby avoiding energy loss caused by divergent propagation of the designated laser light L. Specifically, the collimating lens assembly 160 may include a first collimating lens 161 and a second collimating lens 163. The scattering plate 141, the first collimating lens 161, the scattering wheel 143, and the second collimating lens 163 are sequentially disposed in the optical path of the designated laser light L.

[0038] In some possible embodiments, the laser module 10 may further include a reflector 180. The reflector 180 is disposed between the laser unit 120 and the adjustable optical module 30 and is located on the optical path of the designated laser light L. The reflector 180 is used to change the propagation direction of the designated laser light L, thereby making the overall optical path of the laser module 10 more compact. Specifically, the reflector 180 may be a reflector, which may be disposed on the optical path of the designated laser light L between the scattering plate 141 and the first collimating lens 161.

[0039] In this embodiment, the LED module 20 is used to generate a specified light F. The LED module 20 may include one or more LED modules, wherein each LED module is used to generate monochromatic light, for example, red light, green light, and the like. Referring to Figure 3, the LED module 20 may include a first LED module 210, a second LED module 230, and a wavelength combiner 250. The first LED module 210 is used to generate a first light F1, and the second LED module 230 is used to generate a second light F2, and the wavelengths of the second light F2 and the first light F1 are different. The wavelength combiner 250 is arranged on the optical path where the first light F1 and the second light F2 are located, and is used to perform wavelength combination on the first light F1 and the second light F2 to generate the specified light F. Therefore, the specified light F in this embodiment is a mixed light of the first light F1 and the second light F2.

[0040] Specifically, the first LED module 210 may include a first LED unit 212 and a first lens group 214. The first LED unit 212 is used to generate the first light F1, wherein the first LED unit 212 may include a plurality of first LED lamp beads, and the plurality of first LED lamp beads may form an LED array in an M*N arrangement, or may be arranged in a ring-shaped interval. For example, the first LED lamp bead is a green LED lamp bead, that is, the first light F1 is green light. The first lens group 214 is arranged on the optical path where the first light F1 is located, and is used to collect the first light F1 to improve the energy utilization efficiency of the first light F1. Specifically, the first lens group 214 may include one or more first lenses, and the one or more first lenses are arranged on the optical path where the first light F1 is located. In the embodiment shown in Figure 3, the number of first lenses is one.

[0041] The second LED module 230 may include a second LED unit 232 and a second lens group 234. The second LED unit 232 is used to generate a second light F2, wherein the second LED unit 232 may include a plurality of second LED lamp beads, and the plurality of second LED lamp beads may form an LED array in an M*N arrangement, or may be arranged in a ring-shaped interval. For example, the second LED lamp beads are red LED lamp beads, that is, the second light F2 is red light. The second lens group 234 is arranged on the optical path where the second light F2 is located, and is used to collect the second light F2 to improve the energy utilization efficiency of the second light F2. Specifically, the second lens group 234 may include one or more second lenses, and the one or more second lenses are arranged on the optical path where the second light F2 is located. In the embodiment shown in Figure 3, the number of second lenses is one.

[0042] The wavelength combiner 250 is used to combine the wavelengths of the first light F1 and the second light F2. For example, the wavelength combiner 250 can be used to transmit the first light F1 and reflect the second light F2, or it can be used to transmit the second light F2 and reflect the first light F1. In the embodiment shown in Figure 3, the wavelength combiner 250 is used to transmit the first light F1 and reflect the second light F2. For example, when the first light F1 is green light and the second light F2 is red light, the surface of the wavelength combiner 250 can be coated with a film that transmits green light and reflects red light.

[0043] It should be noted that the LED module 20 shown in FIG3 is merely illustrative. In other possible embodiments, the LED module 20 may include one LED module, or three or more LED modules. For example, the LED module 20 may include three LED modules, each configured to generate green light, red light, and blue light, respectively. In other words, the light F is designated as a mixed light of red, green, and blue.

[0044] In some possible embodiments, the adjustable light module 30 is provided with a mechanical structure (not shown in the figure), and the user can manually manipulate the mechanical structure to adjust the size of the light-transmitting area 310 to adjust the color gamut of the output light O. Specifically, the mechanical structure can be a paddle transmission structure, a dial transmission structure, etc.

[0045] In other possible embodiments, the light source device 100 may further include a controller 40, which is electrically connected to the adjustable light module 30 and is used to adjust the size of the adjustable light-transmitting area 310 to adjust the content of the specified light F in the outgoing light O, so as to adjust the color gamut of the outgoing light O. Since the size of the adjustable light-transmitting area 310 in this embodiment is controlled by the controller 40, the color gamut of the outgoing light O can be adjusted more accurately and reliably. Specifically, the controller 40 can be a microcontroller unit (MCU). In some possible embodiments, the controller 40 can obtain image parameters of the image to be projected and adjust the size of the adjustable light-transmitting area 310 based on the image parameters.

[0046] As an embodiment, the image parameters of the image to be projected may include the image's color gamut information. Specifically, when the color gamut information is small, the controller 40 may increase the size of the adjustable light-transmitting area 310 to increase the content of the specified light F in the outgoing light O. Conversely, when the color gamut information is large, the controller 40 may decrease the size of the adjustable light-transmitting area 310 to reduce the content of the specified light F in the outgoing light O. It is not difficult to understand here that since the image to be projected is modulated by the outgoing light O, the larger the color gamut of the outgoing light O, the larger the color gamut of the image; conversely, the smaller the color gamut of the outgoing light O, the smaller the color gamut of the image.

[0047] As another embodiment, the image parameters of the image to be projected may include image contrast information. Specifically, when the contrast information is low, the controller 40 may increase the size of the adjustable light-transmitting area 310 to increase the content of the designated light F in the outgoing light O, thereby improving the overall brightness of the outgoing light O. Conversely, when the contrast information is high, the controller 40 may decrease the size of the adjustable light-transmitting area 310 to reduce the content of the designated light F in the outgoing light O, thereby improving the brightness of the designated laser light L.

[0048] In this embodiment, the adjustable light combining module 30 is disposed on the optical path of the designated laser L and the designated light F, and is used to combine the designated laser L and the designated light F to generate output light O. The adjustable light combining module 30 is provided with an adjustable light-transmitting region 310, which allows the designated light F to pass through. The adjustable light-transmitting region 310 is used to adjust the content of the designated light F in the output light O. Therefore, the adjustable light combining module 30 in this embodiment is used to combine the designated laser L and the designated light F on the one hand, and to adjust the transmittance of the designated light F on the other hand.

[0049] The specific implementation of the adjustable light-combining module 30 and the adjustment method of the adjustable light-transmitting area 310 are described in detail below.

[0050] In some possible embodiments, referring to FIG4 and FIG5 , the adjustable light combining module 30 may include a first light combining component 320. The first light combining component 320 is roughly disc-shaped, and may include a first functional portion 321 and a plurality of second functional portions 323. The plurality of second functional portions 323 are arranged around the rotation center O of the first light combining component 320 at intervals, and the second functional portion 323 is used to reflect the specified laser L, and the areas of at least two second functional portions 323 are different. Specifically, the second functional portion 323 may be circular, rectangular, polygonal, etc., and the number of the second functional portions 323 may be 2, 4, 6, etc. In the embodiment shown in FIG5 , the number of the second functional portions 323 is six, and the six second functional portions 323 are arranged around the rotation center O and spaced apart from each other.

[0051] The first functional portion 321 surrounds the periphery of the plurality of second functional portions 323 and is configured to transmit a designated light F. The first functional portion 321 can be considered the area of ​​the first light combiner 320 excluding the plurality of second functional portions 323. Specifically, when the first light combiner 320 combines the designated laser light L and the designated light F, one of the second functional portions 323 is located on the optical path of the designated laser light L, and a portion of the first functional portion 321 is located on the optical path of the designated light F. The specific implementation of the first functional portion 321 and the second functional portion 323 is described in detail below.

[0052] In one embodiment, the first light combining member 320 may be provided with a mechanical structure (e.g., a dial transmission structure), and a user may control the first light combining member 320 to rotate along the rotation center O through the dial transmission structure so that one of the second functional parts 323 is located on the optical path of the designated laser L. In another embodiment, the controller 40 is electrically connected to the first light combining member 320 and is configured to drive the first light combining member 320 to rotate along the rotation center O so that one of the second functional parts 323 is located on the optical path of the designated laser L.

[0053] It is easy to understand that when one of the second functional portions 323 is located on the optical path of the designated laser L, at least a portion of the structure on the first functional portion 321 is located on the optical path of the designated light F, thereby forming an adjustable light-transmitting region 310. Specifically, in the embodiment shown in FIG5 , when the second functional portion 323a is located on the optical path of the designated laser L, region 321a on the first functional portion 321 is located on the optical path of the designated light F. Region 321a surrounds the periphery of the second functional portion 323a and is configured to transmit the designated light F. In this case, region 321a represents the aforementioned adjustable light-transmitting region 310. When the second functional portion 323b is located on the optical path of the designated laser L, region 321b on the first functional portion 321 is located on the optical path of the designated light F. Region 321b surrounds the periphery of the second functional portion 323b and is configured to transmit the designated light F. In this case, region 321b represents the aforementioned adjustable light-transmitting region 310.

[0054] It is not difficult to see here that since the size of the light spot of the designated light F incident on the first light combining element 320 remains constant (a square light spot in FIG5 ), the larger the area of ​​the second functional portion 323, the more light of the designated light F is blocked by the second functional portion 323, and the smaller the area of ​​the adjustable light-transmittance region 310. In FIG5 , the area of ​​the second functional portion 323a is smaller than the area of ​​the second functional portion 323b, and the area of ​​region 321a is larger than the area of ​​region 321b.

[0055] Therefore, when the controller 40 needs to increase the color gamut of the output light O, it can rotate the second functional portion 323 with a larger area to the optical path of the designated laser L to reduce the transmittance of the designated light F. Conversely, when the controller 40 needs to reduce the color gamut of the output light O, it can rotate the second functional portion 323 with a smaller area to the optical path of the designated laser L to increase the transmittance of the designated light F.

[0056] Because the designated laser light L has good collimation, the spread of the designated laser light L barely changes when reflected by different second functional portions 323. However, increasing the area of ​​the second functional portion 323 results in a decrease in the area of ​​the adjustable light-transmitting region 310, resulting in a decrease in the spread of the designated light F. In other words, while the spread of the designated laser light L remains unchanged, this embodiment adjusts the spread of the designated light F to change the light mixing ratio between the designated laser light L and the designated light F, thereby achieving the effect of adjusting the color gamut of the emitted light O.

[0057] Specifically, referring to Figures 4 to 6 , the first light combining member 320 may include a body 3210 and a plurality of reflective units 3230. The body 3210 is generally sheet-shaped (e.g., circular, square, etc.), and is used to secure and support the plurality of reflective units 3230. The body 3210 may be made of a transparent substrate (e.g., glass) to improve light transmission efficiency.

[0058] The surface of the body 3210 in this embodiment is divided into a first area 3232 and multiple second areas 3234 adjacent to each other, wherein the multiple second areas 3234 are arranged around the rotation center O at intervals, and the first area 3232 is arranged around the periphery of the multiple second areas 3234. Specifically, the multiple second areas 3234 are used to fix the multiple reflective units 3230 in a one-to-one correspondence. It should be noted that the names of "first area" and "second area" are made for the convenience of description. In specific examples, there may or may not be a clear dividing line between the structures of the two. In this embodiment, the two are different areas of the body 3210.

[0059] A plurality of reflective units 3230 cover a plurality of second areas 3234 in a one-to-one correspondence to form a plurality of second functional parts 323. The reflective units 3230 are used to reflect the specified laser L, and the areas of at least two reflective units 3230 are different. As an embodiment, the reflective unit 3230 may be a reflector, and a plurality of reflective mirrors are affixed to a plurality of second areas 3234 in a one-to-one correspondence to form a plurality of second functional parts 323. Therefore, the manufacturing process of the first light combining component 320 in this embodiment is simple, which reduces the hardware cost of the light source device 100. As another embodiment, the reflective unit 3230 may be a reflective film, and a plurality of reflective films may be coated in a one-to-one correspondence to a plurality of second areas 3234 using a coating process to form a plurality of second functional parts 323. Therefore, the thickness of the first light combining component 320 in this embodiment is smaller, which can make the structure of the light source device 100 more compact.

[0060] It is easy to understand that, since the main body 3210 is made of a transparent substrate, the area on the main body 3210 where no reflector is attached, or the area on the main body 3210 where no reflective film is coated, can be regarded as the first functional portion 321 .

[0061] In some possible embodiments, the first light combining element 320 may further include a transmission unit 3250, which covers the first region 3232 to form the first functional portion 321. The transmission unit 3250 is configured to transmit the designated light F. Specifically, the transmission unit 3250 may be a fully transparent film, which may be coated on the first region 3232 using a coating process to form the first functional portion 321. Because the designated light F has a broad spectrum, coating the region of the body 3210 (i.e., the first region 3232) that transmits the designated light F with a fully transparent film can reduce color and brightness loss of the designated light F, thereby ensuring the light combining efficiency of the output light O.

[0062] In other possible embodiments, the adjustable light-combining module 30 may further include a transmissive member 340 , which is disposed between the LED module 20 and the first light-combining member 320 and located on the optical path of the designated light F. The transmissive member 340 is configured to transmit the designated light F. Specifically, a fully transparent film may be coated on the surface of the transmissive member 340 to reduce color and brightness loss of the designated light F and ensure the light-combining efficiency of the output light O.

[0063] Therefore, this embodiment adjusts the color gamut of the emitted light O by mechanically rotating the first light combining member 320. Compared with the prior art, there is no need to use a controller 40 with better hardware performance, which can reduce the hardware cost of the light source device 100.

[0064] In some possible embodiments, referring to Figures 7 and 8, the adjustable light combining module 30 may include a second light combining component 360 and a first adjustable aperture 380, wherein the second light combining component 360 is arranged on the optical path where the designated laser L and the designated light F are located, and is used to combine the designated laser L and the designated light F. For example, the second light combining component 360 can be used to reflect the designated laser L and transmit the designated light F to form the output light O, or the second light combining component 360 can be used to reflect the designated light F and transmit the designated laser L to form the output light O. Specifically, in the embodiment shown in Figure 7, the surface of the second light combining component 360 may be provided with a reflective layer and a transmissive layer, wherein the reflective layer is arranged on the optical path where the designated laser L is located, and is used to reflect the designated laser L; the transmissive layer is arranged around the periphery of the reflective layer and is located on the optical path where the designated light F is located, and is used to transmit the designated light F. Therefore, the second light combining component 360 in this embodiment can achieve extended amount light combining of the designated laser L and the designated light F.

[0065] The first adjustable aperture 380 is disposed on the optical path of the outgoing light O and is provided with a first light-transmitting hole 3800 . The first light-transmitting hole 3800 is used for allowing the outgoing light O to pass through.

[0066] In one embodiment, the first adjustable aperture 380 may be provided with a mechanical structure (e.g., a paddle transmission structure) through which a user can adjust the size of the first light-transmitting aperture 3800. In another embodiment, the controller 40 is electrically connected to the first adjustable aperture 380 and is used to adjust the size of the first light-transmitting aperture 3800. Specifically, the first adjustable aperture 380 may be a motorized adjustable aperture.

[0067] It is not difficult to understand here that in the light spot corresponding to the outgoing light O, the designated laser L is located in the inner circle of the light spot, and the designated light F is located in the outer circle of the light spot. Therefore, as the first light-transmitting hole 3800 becomes smaller, fewer designated light rays F can pass through the first light-transmitting hole 3800. Therefore, the first light-transmitting hole 3800 in this embodiment is the adjustable light-transmitting area 310 of the adjustable light module 30. In this embodiment, the expansion amount of the designated light ray F can be adjusted by adjusting the size of the first light-transmitting hole 3800. When the expansion amount of the designated laser L remains unchanged, the light mixing ratio between the designated laser L and the designated light ray F changes, thereby achieving the effect of adjusting the color gamut of the outgoing light O.

[0068] Therefore, when the controller 40 needs to increase the color gamut of the outgoing light O, it can control the first adjustable iris 380 to reduce the aperture of the first light-transmitting hole 3800 to reduce the amount of light transmitted by the designated light F, that is, to reduce the content of the designated light F in the outgoing light O. Conversely, when the controller 40 needs to reduce the color gamut of the outgoing light O, it can control the first adjustable iris 380 to increase the aperture of the first light-transmitting hole 3800 to increase the amount of light transmitted by the designated light F, that is, to increase the content of the designated light F in the outgoing light O.

[0069] Furthermore, when the controller 40 requires a higher image contrast, it can control the first adjustable aperture 380 to further reduce the aperture of the first light-transmitting hole 3800. In this case, the specified light F in the outgoing light O will be completely blocked by the first adjustable aperture 380. The first adjustable aperture 380 will also limit part of the specified laser L from passing through the first light-transmitting hole 3800, which can further improve the contrast of the image so that the image has a better display effect even when the picture is darker.

[0070] Therefore, in this embodiment, the color gamut of the emitted light O is adjusted by mechanically controlling the first adjustable aperture 380. Compared with the prior art, there is no need to use a controller 40 with better hardware performance, which can reduce the hardware cost of the light source device 100.

[0071] In some possible embodiments, referring to FIG. 9 , the adjustable light combining module 30 may include a second light combining component 360 and a second adjustable aperture 390 , wherein the second light combining component 360 is disposed on the optical path of the designated laser L and the designated light F, and is used to combine the designated laser L and the designated light F.

[0072] The second adjustable aperture 390 is disposed on the optical path of the designated light F and is provided with a second light-transmitting hole 3900 for allowing the designated light F to pass through. Specifically, in the embodiment shown in FIG9 , the second adjustable aperture 390 is disposed between the second light combiner 360 and the wavelength light combiner 250 and is located on the optical path of the designated light F.

[0073] In one embodiment, the second adjustable aperture 390 may be provided with a mechanical structure (e.g., a paddle transmission structure) through which a user can adjust the size of the second light-transmitting aperture 3900. In another embodiment, the controller 40 is electrically connected to the second adjustable aperture 390 and is used to adjust the size of the second light-transmitting aperture 3900. Specifically, the second adjustable aperture 390 may be a motorized adjustable aperture. Therefore, when the controller 40 needs to increase the color gamut of the outgoing light O, it can control the second adjustable aperture 390 to reduce the aperture of the second light-transmitting aperture 3900 to reduce the amount of light transmitted by the specified light F. Conversely, when the controller 40 needs to reduce the color gamut of the outgoing light O, it can control the second adjustable aperture 390 to increase the aperture of the second light-transmitting aperture 3900 to increase the amount of light transmitted by the specified light F.

[0074] Therefore, this embodiment adjusts the color gamut of the emitted light O by mechanically controlling the second adjustable aperture 390. Compared with the prior art, there is no need to use a controller 40 with better hardware performance, which can reduce the hardware cost of the light source device 100.

[0075] Referring to FIG. 10 , an embodiment of the present application further provides an optical imaging system 900 , which includes the aforementioned light source device 100 and can be widely used in projection equipment (e.g., micro-projectors, short-throw projectors, and vehicle-mounted micro-projectors), laser televisions, engineering projectors, and laser wall systems. In the embodiment shown in FIG. 10 , the optical imaging system 900 may include the aforementioned light source device 100 , a light homogenization module 910 , a relay module 920 , a prism module 930 , and an optical modulator 940 .

[0076] The light source device 100 is used to generate output light O. The specific structure of the light source device 100 can be referred to the relevant description in the above embodiments and will not be repeated here. The light homogenization module 910 and the relay module 920 are sequentially arranged on the optical path of the output light O. The light homogenization module 910 is used to homogenize the output light O to make the brightness distribution of the output light O more uniform. Specifically, the light homogenization module 910 can be a light homogenization rod or a fly-eye lens.

[0077] The relay module 920 is used to transmit the outgoing light O. Specifically, the relay module 910 may include a single lens or a lens assembly consisting of multiple lenses. In the embodiment shown in FIG10 , the relay module 920 includes two lenses, which serve to converge the outgoing light O to improve the energy utilization efficiency of the outgoing light O.

[0078] The prism module 930 is disposed between the relay module 920 and the light modulator 940 and is used to reflect the outgoing light O and focus it onto the light modulator 940. The light modulator 940 is used to modulate the light and form light that carries the image information. The prism module 930 is also used to transmit the light that carries the image information to the projection area, such as a wall, a projection screen, or the like. Specifically, the prism module 930 can be a total internal reflection (LIR) prism.

[0079] In some possible embodiments, the light modulator 940 can be a digital micromirror device (DMD). The DMD is composed of a digital micromirror array, each digital micromirror constitutes a modulation unit, and a modulation unit is used to modulate the image corresponding to a pixel. Each digital micromirror is flipped under the drive signal generated by the control device. The number of flips of each digital micromirror is determined by the drive signal. The flipped digital micromirror modulates the light reflected by the prism module 930 and forms light carrying image information. In some other possible embodiments, the light modulator 940 can also be an HTPS LCD display chip, a reflective LCD device LCOS, etc. This embodiment does not limit the specific implementation method of the light modulator 940.

[0080] This embodiment provides a light source device 100 and an optical imaging system 900 equipped with the light source device 100. The light source device 100 may include a laser module 10, an LED module 20, and an adjustable light combining module 30. The laser module 10 is used to generate a specified laser L, and the LED module 20 is used to generate a specified light F. The adjustable light combining module 30 is disposed on the optical path where the specified laser L and the specified light F are located, and is used to combine the specified laser L and the specified light F to generate output light O. Specifically, the adjustable light combining module 30 is provided with an adjustable light-transmitting area 310, which allows the specified light F to pass through. The adjustable light-transmitting area 310 is used to adjust the content of the specified light F in the output light O.

[0081] This embodiment adjusts the color gamut of the emitted light O by mechanically changing the size of the adjustable light-transmitting area 310 in the adjustable light-combining module 30. Compared with the prior art, the controller 40 with better hardware performance is not required, which can reduce the hardware cost of the light source device 100.

[0082] In the specification of this application, certain words are used to refer to specific components in the specification and claims. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of the components as the criterion for distinction. For example, "including" mentioned throughout the specification and claims is an open term and should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0083] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only used to simplify the description for the convenience of describing this application, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0084] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, these terms may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; internal communication between two components; or mere surface contact. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0086] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A light source device, characterized in that: include: A laser module, used to generate a specified laser; LED module, used to generate designated light; as well as An adjustable light combining module, wherein the adjustable light combining module is provided with an adjustable light-transmitting area that allows the specified light to pass through; the adjustable light combining module is arranged on the optical path where the specified laser and the specified light are located, and is used to combine the specified laser and the specified light to generate output light; the adjustable light-transmitting area is used to adjust the content of the specified light in the output light.

2. The light source device according to claim 1, characterized in that: The light source device further includes a controller, which is electrically connected to the adjustable light module and is used to adjust the size of the adjustable light-transmitting area to adjust the content of the designated light in the emitted light.

3. The light source device according to claim 1, characterized in that: The adjustable light combining module comprises a first light combining component, the first light combining component comprises a first functional part and a plurality of second functional parts; the plurality of second functional parts are arranged around the rotation center of the first light combining component at intervals; the second functional part is used to reflect the specified laser, and the areas of at least two of the second functional parts are different; the first functional part surrounds the periphery of the plurality of second functional parts, and is used to transmit the specified light; When the first light combining component combines the designated laser light and the designated light beam, one of the second functional parts is located on the light path where the designated laser light is located, and part of the first functional parts is located on the light path where the designated light beam is located.

4. The light source device according to claim 3, characterized in that: The first light combining component includes a body and a plurality of reflecting units; The surface of the body is divided into a first area and a plurality of second areas adjacent to each other, the plurality of second areas are arranged around the rotation center at intervals; the first area is arranged around the periphery of the plurality of second areas; The plurality of reflection units cover the plurality of second regions in a one-to-one correspondence to form a plurality of second functional parts, and at least two of the reflection units have different areas. The reflection units are used to reflect the designated laser.

5. The light source device according to claim 4, characterized in that: The adjustable light combining module further includes a transmission component, which is disposed between the LED module and the first light combining component and located on the optical path where the designated light is located, and is used to transmit the designated light.

6. The light source device according to claim 4, characterized in that: The first light combining member further includes a transmission unit, the transmission unit covers the first area to form the first functional portion, and the transmission unit is used to transmit the designated light.

7. The light source device according to claim 1, characterized in that: The adjustable light combining module comprises a second light combining component and a first adjustable aperture, wherein the second light combining component is arranged on the optical path where the designated laser and the designated light are located, and is used to combine the designated laser and the designated light; The first adjustable aperture is arranged on the optical path where the outgoing light is located, and is provided with a first light-transmitting hole, and the first light-transmitting hole is used for allowing the outgoing light to pass through.

8. The light source device according to claim 1, characterized in that: The adjustable light combining module comprises a second light combining component and a second adjustable aperture, wherein the second light combining component is arranged on the optical path where the designated laser and the designated light are located, and is used to combine the designated laser and the designated light; The second adjustable aperture is arranged on the optical path where the designated light is located, and is provided with a second light-transmitting hole, and the second light-transmitting hole is used for allowing the designated light to pass through.

9. The light source device according to any one of claims 1 to 8, characterized in that: The laser module comprises a laser unit and a scattering unit; the laser unit is used to generate the specified laser; The scattering unit is arranged between the laser unit and the adjustable optical module, and is located on the optical path where the designated laser is located.

10. The light source device according to claim 9, characterized in that: The scattering unit comprises a scattering sheet and a scattering wheel, and the scattering sheet and the scattering wheel are sequentially arranged on the optical path where the laser is located.

11. An optical imaging system, characterized in that: include: The light source device according to any one of claims 1 to 10, wherein the light source device is used to generate output light; as well as The optical modulator is arranged on the optical path where the outgoing light is located.

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