Light source device and projection equipment

Abstract

The present application provides a light source device and a projection device. The light source device includes a light source module and a wavelength conversion device. The light source module includes a plurality of light emitting units arranged in a strip structure at intervals, and each light emitting unit can independently emit a light beam. The wavelength conversion device includes a wavelength conversion region and a non-wavelength conversion region. The wavelength conversion region is used to convert the light beam emitted by the light emitting unit into a stimulated light. The wavelength conversion region and the non-wavelength conversion region enter the light beam of the light source module in sequence. The light source module performs a rotational motion so that the light beam emitted by the light emitting unit irradiates different positions of the wavelength conversion region or the non-wavelength conversion region, and then by individually controlling the intensity of the light beam emitted by each light emitting unit, a local dimming effect of the light source device can be achieved. Compared with linear array lamp beads, the number of light emitting units is effectively reduced, thereby helping to reduce the cost of the light source module and promote the miniaturization of the light source module.

Description

Technical Field

[0001] The present application relates to the field of projection display technology, and in particular to a light source device and a projection equipment. Background Art

[0002] High Dynamic Range (HDR) technology can improve the contrast between light and dark in a frame and is therefore used in projection displays. Projection displays usually use linear array lamp beads for backlighting to achieve local dimming. Local dimming can keep the bright parts of the display bright and the rest dark, effectively improving the contrast between light and dark. However, the number of lamp beads in a linear array lamp bead is large, resulting in a larger volume and higher cost. Summary of the invention

[0003] The embodiments of the present application propose a light source device and a projection device to solve the technical problem that an excessive number of lamp beads are provided to achieve local dimming, which results in a large volume.

[0004] The implementation method of the present application achieves the above-mentioned purpose through the following technical solutions.

[0005] In a first aspect, an embodiment of the present application provides a light source device, the light source device includes a light source module and a wavelength conversion device, the light source module includes a plurality of light emitting units arranged in a strip structure at intervals, and each light emitting unit can independently emit a light beam. The wavelength conversion device includes a wavelength conversion region and a non-wavelength conversion region, the wavelength conversion region is used to convert the light beam emitted by the light emitting unit into a converted light, and the wavelength conversion region and the non-wavelength conversion region sequentially enter the light beam emission path of the light source module. The light source module performs a rotational motion so that the light beam emitted by the light emitting unit irradiates different positions of the wavelength conversion region or the non-wavelength conversion region.

[0006] In some embodiments, the plurality of light-emitting units are distributed at intervals along the radial direction of the rotation trajectory of the light source module.

[0007] In some embodiments, the total number of wavelength conversion regions and non-wavelength conversion regions is M, and the rotation frequency of the light source module is nM times the rotation frequency of the wavelength conversion device, where n is a positive integer.

[0008] In some embodiments, the light source device further includes a collimating lens group, which is located on the outgoing light path of the wavelength conversion device, and the light emitted by the wavelength conversion device is collimated by the collimating lens group before being emitted.

[0009] In some embodiments, the collimating lens group and the wavelength conversion device are arranged at intervals, and the collimating lens group and the light source module rotate synchronously.

[0010] In some embodiments, the collimating lens group is attached to the light emitting surface of the wavelength conversion device which is away from the light source module.

[0011] In some embodiments, the light source device further includes a light-homogenizing component, which is located in the outgoing light path of the collimating lens group. The light emitted through the collimating lens group is then homogenized by the light-homogenizing component before being emitted.

[0012] In some embodiments, the light source module includes a connected substrate and a rotating shaft, the substrate is in a strip shape, the light-emitting unit is fixed to the substrate along the length extension direction of the substrate, the rotating shaft is fixed to the end of the substrate, and the rotation of the rotating shaft drives the substrate to rotate.

[0013] In some embodiments, the light source module includes a connected substrate and a rotating shaft, the substrate is disc-shaped, the light-emitting unit is fixed to the substrate along the radial direction of the substrate, and the rotating shaft is fixed to the center position of the substrate and drives the substrate to rotate.

[0014] In a second aspect, the present application also provides a projection device, which includes a spatial light modulator and a light source device according to any of the above embodiments. The spatial light modulator includes a light incident surface, and the light source module is rotated so that the light-emitting unit is at a different position relative to the light incident surface, and at least a portion of the light emitted by the light-emitting unit is incident on the light incident surface.

[0015] In some embodiments, the light source module is selectively in the first state or the second state by rotating, all the light emitting units of the light source module in the first state are located in the first area, a part of the light emitting units of the light source module in the second state are located in the first area and another part of the light emitting units are located in the second area, the light emitted by the light emitting units located in the first area is irradiated to the light incident surface, and the light emitted by the light emitting units located in the second area is not irradiated to the light incident surface. The light source device also includes a processor, the processor controls the light emitting units located in the first area to emit light according to the image signal, and the processor also controls the light emitting units located in the second area to turn off according to the image signal.

[0016] In some embodiments, the processor controls the light-emitting units located in the first area to emit light according to the image signal, including at least one of the following methods: the processor controls the brightness of the light-emitting units located in the first area at different time sequences according to the image signal; the processor controls the brightness of the light-emitting units located at different positions in the first area according to the image signal.

[0017] In the light source device and projection equipment provided in the embodiments of the present application, the light source module includes a plurality of light-emitting units arranged in a strip structure at intervals, the wavelength conversion device includes a wavelength conversion area and a non-wavelength conversion area, the wavelength conversion area is used to convert the light beam emitted by the light-emitting unit into a stimulated light, the wavelength conversion area and the non-wavelength conversion area enter the light beam emission path of the light source module in sequence, the light source module rotates so that the light beam emitted by the light-emitting unit is irradiated to different positions of the wavelength conversion area or the non-wavelength conversion area, since each light-emitting unit can emit a light beam independently, and then by individually controlling the intensity of the light beam emitted by each light-emitting unit, the local dimming effect of the light source device can be achieved, which effectively reduces the number of light-emitting units compared to linear array lamp beads, thereby helping to reduce the cost of the light source module and promote the miniaturization of the light source module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the light source device and the spatial light modulator provided in the embodiment of the present application.

[0020] Figure 2 yes Figure 1 A structural schematic diagram of a light source module of a light source device.

[0021] Figure 3 It is a schematic diagram of the light source module of the light source device provided in the embodiment of the present application cooperating with the light incident surface of the spatial light modulator.

[0022] Figure 4 It is a schematic diagram of a light source module of a light source device provided in another embodiment of the present application cooperating with a light incident surface of a spatial light modulator.

[0023] Figure 5 yes Figure 4 A schematic diagram of a light source module of a light source device rotated to another position relative to the light incident surface of a spatial light modulator.

[0024] Figure 6 It is a module schematic diagram of the light source device provided in an embodiment of the present application.

[0025] Figure 7 It is a schematic diagram of a light spot of one of the light-emitting units on the light incident surface of the spatial light modulator when light emitted from the light source device provided in an embodiment of the present application is irradiated.

[0026] Figure 8 It is a schematic diagram of light emitted by a light source module of a light source device provided in an embodiment of the present application being formed on a light incident surface of a spatial light modulator.

[0027] Fig. 9 It is a schematic diagram of light emitted by a light source module of a light source device provided in another embodiment of the present application being formed on a light incident surface of a spatial light modulator.

[0028] Fig.10 It is a schematic diagram of a light source module of a light source device provided in another embodiment of the present application cooperating with a light incident surface of a spatial light modulator.

[0029] Fig.11 It is a schematic structural diagram of a light source device provided in another embodiment of the present application.

[0030] Fig.12 It is a schematic diagram of the light source module and the wavelength conversion device of the light source device provided in the embodiment of the present application rotating in the same direction.

[0031] Fig.13 This is a schematic diagram of the light source module and the wavelength conversion device of the light source device provided in another embodiment of the present application rotating in opposite directions.

[0032] Fig.14 It is a structural schematic diagram of a light source device provided in yet another embodiment of the present application.

[0033] Fig.15 It is a schematic diagram of the structure of the projection device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the implementation mode of the present application. Obviously, the described implementation mode is only a part of the implementation mode of the present application, not all the implementation modes. Based on the implementation mode in the present application, all other implementation modes obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0035] See also Figure 1 The embodiment of the present application provides a light source device 200 , which is suitable for cooperating with a spatial light modulator 220 .

[0036] The spatial light modulator 220 may be any one of a liquid crystal display (LCD) device, a liquid crystal on silicon (LCOS) device, a digital micromirror device (DMD) device, etc. For example, in a scenario where the light source device 200 is applied to a vehicle head-up display (HUD), the spatial light modulator 220 may be an LCD device or a DMD device; in a scenario where the light source device 200 is applied to a projection device 1000, the spatial light modulator 220 may be an LCD device, an LCOS device, or a DMD device.

[0037] The spatial light modulator 220 includes a light incident surface 222. The spatial light modulator 220 receives light emitted by the light source device 200 through the light incident surface 222, and modulates the light and emits it to the outside of the spatial light modulator 220 through the emission surface. The emission surface and the light incident surface 222 can be the same surface. The size of the light incident surface 222 can adapt to a projection screen with a ratio of 16:9, and can also adapt to a projection screen with a ratio of 4:3.

[0038] The light source device 200 includes a light source module 240 and a wavelength conversion device 280. The light source module 240 is used to emit light, and the wavelength conversion device 280 is located in the output light path of the light source module 240. The spatial light modulator 220 is used to receive the light beam emitted by the wavelength conversion device 280.

[0039] The light source module 240 is suitable for facing the light incident surface 222 of the spatial light modulator 220. Figure 2 The light source module 240 includes a plurality of light-emitting units 242 arranged at intervals in a strip structure, and each light-emitting unit 242 emits light independently, that is, each light-emitting unit 242 can be individually lit, extinguished, and the light intensity can be adjusted, etc. The strip structure is not limited to a linear strip structure, and a strip structure with a curvature is also applicable. For example, a plurality of light-emitting units 242 are arranged into a strip light strip with a curvature. The light-emitting unit 242 can be a laser diode (Laser Diode) or a light-emitting diode (Light Emitting Diode). The light emitted by the light-emitting unit 242 can be blue light, purple light, red light, green light, ultraviolet light, or other types of light, which are not listed here one by one.

[0040] The light source module 240 may further include a substrate 246 and a rotating shaft 248 connected to each other. For example, the substrate 246 may be substantially strip-shaped, the light-emitting unit 242 may be fixed to the substrate 246 along the length extension direction of the substrate 246, the rotating shaft 248 may be fixed to the end of the substrate 246, and the rotation of the rotating shaft 248 may drive the substrate 246 to rotate, thereby realizing the rotation of the light-emitting unit 242. In other embodiments, the substrate 246 may be substantially disc-shaped, the light-emitting unit 242 may be fixed to the substrate 246 along the radial direction of the substrate 246, and the rotating shaft 248 may be fixed to the center of the substrate 246 and drive the substrate 246 to rotate.

[0041] The light source module 240 can rotate relative to the spatial light modulator 220, for example, the rotation axis of the light source module 240 can be perpendicular to the light incident surface 222 of the spatial light modulator 220. In other embodiments, the light source module 240 and the spatial light modulator 220 can realize light propagation through a deflection element, in which case the rotation axis of the light source module 240 does not need to be perpendicular to the light incident surface 222 of the spatial light modulator 220, which helps to reasonably arrange the positions of the light source module 240 and the spatial light modulator 220 according to actual conditions to shorten the distance between the two, thereby promoting the miniaturization of the light source device.

[0042] The rotation track 244 formed by the light source module 240 during the rotation process can be circular, and the diameter of the rotation track 244 is greater than or equal to the diagonal size of the light incident surface 222, so that the rotation track 244 can cover the light incident surface 222. Figure 3 or Figure 4 As shown, the light source module 240 can rotate an integer multiple of circles within one frame time to achieve the effect that the emitted light can illuminate various positions within the light incident surface 222 .

[0043] Under the condition that the rotation track 244 of the light source module 240 covers the light incident surface 222, the number of the light emitting units 242 of the light source module 240 can be reduced as much as possible. Figure 4 As shown, the several light-emitting units 242 of the light source module 240 can be distributed at radial intervals along the rotation trajectory 244 of the light source module 240, and the rotation center of the light source module 240 can correspond to the center of the light incident surface 222. At this time, the light source module 240 effectively reduces the number of the light-emitting units 242, thereby helping to reduce the cost of the light source module 240 and promote the miniaturization of the light source module 240.

[0044] The light source module 240 is rotated so that the light emitting unit 242 is in different positions relative to the light incident surface 222. During the rotation process, the light source module 240 can make at least a portion of the light emitted by the light emitting unit 242 illuminate the light incident surface 222 in each time sequence. For example, the light source module 240 is selectively in the first state or the second state by rotating; Figure 4 As shown, all the light emitting units 242 of the light source module 240 in the first state are located in the first area, and the light emitted by the light emitting units 242 located in the first area is irradiated to the light incident surface 222; Figure 5 As shown, a part of the light emitting units 242 of the light source module 240 in the second state is located in the first area and another part of the light emitting units 242 is located in the second area, the light emitted by the light emitting units 242 located in the first area is irradiated to the light incident surface 222, and the light emitted by the light emitting units 242 located in the second area is not irradiated to the light incident surface 222. Since each light emitting unit 242 emits light independently, and then the light intensity of each light emitting unit 242 irradiating the light incident surface 222 is individually controlled, the local dimming effect of the light source device 200 can be achieved, and the number of light emitting units 242 is effectively reduced compared to the linear array lamp beads, thereby helping to reduce the cost of the light source device 200 and promote the miniaturization of the light source device 200. In the case of achieving the local dimming effect, the light emitting units 242 in the second area can also be controlled to be extinguished to save power.

[0045] See also Figure 1 The wavelength conversion device 280 is located in the outgoing light path of the light source module 240, and the light emitted by the light source module 240 is emitted through the wavelength conversion device 280. The wavelength conversion device 280 includes a wavelength conversion area 281 and a non-wavelength conversion area 283. The wavelength conversion area 281 is used to convert the light beam emitted by the light emitting unit 242 into a converted light beam, and the non-wavelength conversion area 283 is used to scatter and / or transmit the light beam emitted by the light emitting unit 242. The wavelength conversion area 281 and the non-wavelength conversion area 283 enter the outgoing path of the light beam of the light source module 240 in sequence. The light source module 240 rotates so that the light beam emitted by the light emitting unit 242 illuminates different positions of the wavelength conversion area 281 or the non-wavelength conversion area 283. Since each light emitting unit 242 can emit a light beam independently, the intensity of the light beam emitted by each light emitting unit 242 can be controlled individually, so as to achieve a local dimming effect of the light source device 200. Compared with linear array lamp beads, the number of light emitting units 242 is effectively reduced, thereby helping to reduce the cost of the light source module 240 and promoting the miniaturization of the light source module 240.

[0046] The total number of wavelength conversion regions 281 and non-wavelength conversion regions 283 is M, and the wavelength conversion device 280 includes at least one wavelength conversion region 281 and at least one non-wavelength conversion region 283, then M is a positive integer greater than or equal to 2. The wavelength conversion region 281 and the non-wavelength conversion region 283 are collectively referred to as partitions of the wavelength conversion device 280. For example, in this embodiment, M is 3, then the wavelength conversion device 280 includes 3 partitions, the 3 partitions are distributed in a ring shape, the area of ​​each partition may be equal, and the area of ​​each partition is greater than or equal to the area of ​​the rotation track 244 formed by the light source module 240.

[0047] The wavelength conversion device 280 can be a transmission-type wavelength conversion device. The wavelength conversion device 280 is provided with a wavelength conversion material layer. If the light emitted by the light-emitting unit 242 is called excitation light, the wavelength conversion material layer can convert at least part of the excitation light into converted light. Among them, excitation light and converted light are relative concepts. Excitation light refers to light that can excite the wavelength conversion material layer so that the wavelength conversion material generates light of different wavelengths. Converted light refers to light generated by the wavelength conversion material layer being excited by the excitation light. For example, blue light excites the yellow light conversion material layer to generate yellow light. At this time, the blue light is the excitation light and the yellow light is the converted light. Yellow light excites the red conversion material layer to generate red light. At this time, the yellow light is the excitation light and the red light is the converted light. Blue light excites the green light conversion material layer to generate green light. At this time, the blue light is the excitation light and the green light is the converted light.

[0048] The wavelength conversion material layer can be set in two of the partitions. For example, in this embodiment, the light emitting unit 242 includes a blue semiconductor laser diode, and the light emitting unit 242 emits a blue laser. Then, one of the two partitions of the wavelength conversion device 280 is provided with a yellow light conversion material layer and the other partition is provided with a green light conversion material layer. In this way, the light source module 240 and the wavelength conversion material of the wavelength conversion device 280 cooperate to realize a red and green spectrum.

[0049] The wavelength conversion material layer may include phosphorescent materials, such as phosphors, and may also include nanomaterials, such as quantum dots, and may also include fluorescent materials, which are not listed here one by one. In one embodiment, the wavelength conversion material layer includes fluorescent materials, and the stimulated light emitted by the wavelength conversion material layer is fluorescent light. Since fluorescent light is incoherent light, there is no effect of speckle. By using blue light to excite the fluorescent material to produce green fluorescence and red fluorescence, the speckle problem of human vision caused by the coherence of the light emitted by the light source module 240 can be avoided.

[0050] In order to adapt that the light emitted by the light source module 240 can change or not change the wavelength after being emitted by the wavelength conversion device 280, the rotation frequency of the light source module 240 can be nM times the rotation frequency of the wavelength conversion device 280, where n is a positive integer, so that the wavelength conversion device 280 rotates 360 / M degrees every time, the light source module 240 rotates n circles, which helps the light source module 240 to make the light emitted by the light emitting unit 242 pass through the corresponding partition according to the type of light required by the image signal. In this embodiment, M is 3, then the rotation frequency of the light source module 240 can be 3 times, 6 times or 9 times the rotation frequency of the wavelength conversion device 280, etc.

[0051] The rotation direction of the wavelength conversion device 280 can be the same as or opposite to the rotation direction of the light source module 240. When the rotation frequency and rotation direction of the wavelength conversion device 280 and the light source module 240 remain unchanged, the scanning trajectory of the light emitted by each light emitting unit 242 of the light source module 240 to each partition of the wavelength conversion device 280 remains unchanged.

[0052] For example, when the rotation frequencies of the wavelength conversion device 280 and the light source module 240 remain unchanged and the rotation directions D1 of the two are the same, the light emitted by the light emitting unit 242 of the light source module 240 irradiates the scanning track 284 of the wavelength conversion device 280 as shown in FIG. Fig.12 As shown, the scanning trajectories 284 of the three partitions of the wavelength conversion device 280 are the same.

[0053] For another example, the rotation frequencies of the wavelength conversion device 280 and the light source module 240 remain unchanged, the rotation direction D1 of the wavelength conversion device 280 and the rotation direction D2 of the light source module 240 can be opposite, and the light emitted by the light emitting unit 242 of the light source module 240 irradiates the scanning track 286 of the wavelength conversion device 280 as shown in FIG. Fig.13 As shown, the scanning tracks 286 of the three subareas of the wavelength conversion device 280 are the same. Although the scanning tracks 286 formed in the subareas when the wavelength conversion device 280 and the light source module 240 rotate in opposite directions are different from the scanning tracks 284 formed in the subareas when the wavelength conversion device 280 and the light source module 240 rotate in the same direction, they do not affect the light emitting effect of the light source device 100, which helps the light source device 200 to set the rotation direction of the wavelength conversion device 280 to be the same as or different from the rotation direction of the light source module 240 according to the actual situation, thereby improving the operability of the light source device 100.

[0054] See also Figure 6, the light source device 200 may further include a processor 260, and the processor 260 may be electrically connected to the light source module 240. The processor 260 has multiple functional modules built in, and the different functional modules cooperate with each other and jointly realize the operation of the light source device 200. In some embodiments, the processor 260 may be made into an independent device, equipment, etc., and transmit signals with the light source module 240 in a wired manner. In some other embodiments, the processor 260 may also be integrated with the light source module 240.

[0055] The processor 260 controls the light-emitting unit 242 of the light source module 240 to emit light based on the image signal. For example, the processor 260 can control the light-emitting unit 242 located in the first area to emit light according to the image signal. There are multiple ways for the processor 260 to control the light-emitting unit 242 located in the first area to emit light. For example, the processor 260 can control the brightness of the light-emitting unit 242 located in the first area at different time sequences according to the image signal; or, the processor 260 can control the brightness of the light-emitting unit 242 located at different positions in the first area according to the image signal. In addition, the processor 260 can also control the light-emitting unit 242 located in the second area to turn off according to the image signal. Among them, the image signal can be the image information of the image to be projected. The processor 260 can determine the corresponding light-emitting unit 242 in the light source module 240 according to the image signal, and adjust the light-emitting unit 242, for example, the light-emitting unit 242 can be turned on, turned off, increased or decreased in light intensity, etc.

[0056] For example Figure 7 The figure shows a light spot irradiated to the light incident surface 222 by a light emitting unit 242 at a certain position in the light source module 240. The length of the light spot is L, the width is H, the rotation radius corresponding to the four vertices of the light spot are r1, r2, r3, and r4 respectively, and the linear speed corresponding to the four vertices of the light spot are v1, v2, v3, and v4. Since each light emitting unit 242 in the light source module 240 is fixed in the position of the light source module 240, the processor 260 can determine the light emitting unit 242 in the light source module 240 corresponding to the light spot according to the above-mentioned parameters of the light spot, so as to control the light emitting unit 242, for example, to light up, extinguish, increase or decrease the light intensity of the light emitting unit 242, and so on.

[0057] For example, the processor 260 can control at least a portion of the light emitting units 242 of the light source module 240 to emit light to the light incident surface 222 according to the image signal, so as to provide the required light for a specific position 224 of the light incident surface 222 of the spatial light modulator 220, such as Figure 8 shown.

[0058] The processor 260 can adjust the time that the light irradiated on the light incident surface 222 stays on the light incident surface 222 by controlling the rotation frequency of the light source module 240 to realize the brightness of the light emitting units 242 located at different positions in the first area or the brightness of the light emitting units 242 located in the first area at different time sequences. Since the illumination of the light irradiated on the light incident surface 222 is related to the time and light intensity of the light staying there, when the light intensity remains unchanged, the longer the light stays within a certain time range, the greater the illumination of the light, thereby realizing the control of the illumination of the light. For example, Fig. 9 As shown, in a specific position 224 of the light incident surface 222, the light emitting unit 242 can realize a gradual change in the illumination of the light along the rotation direction. Compared with the linear array lamp beads, the illumination of the light can only achieve a step-by-step change, which adds the effect of the light source module 240 providing light for the spatial light modulator 220.

[0059] The processor 260 can also control the other part of the light emitting units 242 of the light source module 240 that are not irradiated to the light incident surface 222 to turn off according to the image signal. Fig.10 As shown, since the light that is not irradiated to the light incident surface 222 will not be modulated by the spatial light modulator 220, the power consumption of the light source device 200 can be reduced by turning off the other part of the light emitting units 242, thereby achieving the effect of saving electricity.

[0060] See also Fig.11 The light source device 200 may further include a collimating lens group 210, which is located in the outgoing light path of the wavelength conversion device 280. The light emitted from the wavelength conversion device 280 is collimated by the collimating lens group 210 and then emitted.

[0061] In one embodiment, the collimating lens group 210 and the wavelength conversion device 280 are arranged at intervals, and the collimating lens group 210 rotates synchronously with the light source module 240. The shape and structure of the collimating lens group 210 and the light source module 240 can be similar. For example, the collimating lens group 210 is a rotating lens group, and the rotation axis of the collimating lens group 210 coincides with the rotation axis of the light source module 240. The collimating lens group 210 includes a plurality of collimating lenses, and the plurality of collimating lenses are distributed at intervals along the radial direction of the rotation track of the collimating lens group 210. The collimating lens group 210 is generally in a long strip structure, so that each collimating lens is used to collimate the light emitted by the corresponding light emitting unit 242. Since there is no need to set too many collimating lenses in the collimating lens group 210 to cover the entire wavelength conversion device 280, the light emitted by the light emitting unit 242 can still be collimated, which helps to simplify the structure of the collimating lens group 210 and reduce the cost of the collimating lens group 210.

[0062] In another embodiment, Fig.14As shown, the collimating lens group 210 is attached to the light emitting surface of the wavelength conversion device 280 which is away from the light source module 240. The multiple collimating lenses in the collimating lens group 210 can be bonded to the respective partitions of the transmission-type wavelength conversion device by optical glue. For example, the collimating lenses can be bonded to the positions corresponding to the scanning tracks in the partitions. Since the gap between the collimating lens group 210 and the wavelength conversion device 280 is reduced, the collimating lens group 210 and the wavelength conversion device 280 are made more compact, which helps to promote the miniaturization of the light source device 200.

[0063] The light source device 200 may further include a light-homogenizing component 230, which is located in the outgoing light path of the collimating lens group 210. The light emitted from the collimating lens group 210 is then homogenized by the light-homogenizing component 230 before being emitted. For example, the light-homogenizing component 230 may include a diffusion film 232 and a microlens array module 234, so that the light emitted from the light-emitting unit 242 is homogenized by the diffusion film 232 and then homogenized by the microlens array module 234 to achieve uniform illumination. Fig.14 As shown, since the microlens array module 234 includes a plurality of microlenses 235 , light can be better aggregated, which helps to evenly illuminate the light incident surface 222 of the spatial light modulator 220 .

[0064] The light source device 200 may further include a prism group 250, which may be disposed between the light source module 240 and the spatial light modulator 220 to adjust the propagation path of light. The prism group 250 may include a plurality of lenses. For example, in the present embodiment, the prism group 250 includes two prisms, and the two prisms cooperate with each other to form an approximately square structure. The prism group 250 is located in the outgoing light path of the light source module 240. The prism group 250 guides the light emitted by the light source module 240 to the spatial light modulator 220, which helps to arrange the relative position between the spatial light modulator 220 and the light source module 240 more compactly, thereby promoting the miniaturization of the light source device 200.

[0065] See also Fig.15 The embodiment of the present application also provides a projection device 1000, which can be a cinema projector, an engineering projector, a micro projector, an educational projector, a splicing wall projector, a laser TV, etc.

[0066] The projection device 1000 includes a spatial light modulator 220 and a light source device 200 of any of the above embodiments. The spatial light modulator 220 includes a light incident surface 222. The light source module 240 rotates so that the light emitting unit 242 is at a different position relative to the light incident surface 222, and at least a portion of the light emitted by the light emitting unit 242 is incident on the light incident surface 222. The projection lens 400 may also include a projection lens 400, which receives the light emitted by the light source device 200 and projects it. For example, the light emitting unit 242 of the light source module 240 emits light, and the light can be sequentially irradiated to the spatial light modulator 220 after passing through the wavelength conversion device 280, the collimating lens group 210, the diffusion film 232, the microlens array module 234 and the prism group 250, and the light is modulated by the spatial light modulator 220 and then projected to the outside of the projection device 1000 through the prism group 250 and the projection lens 400.

[0067] In the projection device 1000 provided in the embodiment of the present application, the light source module 240 is provided with a plurality of light emitting units 242 arranged in a strip structure at intervals, and the wavelength conversion device 280 includes a wavelength conversion area 281 and a non-wavelength conversion area 283, the wavelength conversion area 281 is used to convert the light beam emitted by the light emitting unit 242 into a stimulated light, and the wavelength conversion area 281 and the non-wavelength conversion area 283 enter the light beam emission path of the light source module 240 in sequence, and the light source module 240 performs a rotational motion so that the light beam emitted by the light emitting unit 242 is irradiated to different positions of the wavelength conversion area 281 or the non-wavelength conversion area 283. Since each light emitting unit 242 can emit a light beam independently, and then by individually controlling the intensity of the light beam emitted by each light emitting unit 242, the local dimming effect of the light source device 200 can be achieved, and the number of light emitting units 242 is effectively reduced compared to linear array lamp beads, thereby helping to reduce the cost of the light source module 240 and promote the miniaturization of the light source module 240.

[0068] In this application, unless otherwise clearly specified or limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements, or it can be only surface contact, or surface contact connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In addition, the terms "first", "second", etc. are only used to distinguish descriptions and cannot be understood as specific or special structures. The descriptions of the terms "some embodiments", "other embodiments", etc. mean 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 invention. In this application, 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 the different embodiments or examples described in this application and the features of the different embodiments or examples without contradiction.

[0070] The above implementation modes 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 implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various implementation modes of the present application, and should all be included in the protection scope of the present application.

Claims

1. A light source device, characterized in that: include: The light source module comprises a plurality of light emitting units arranged in a strip structure at intervals, each of the light emitting units being capable of independently emitting a light beam; A wavelength conversion device, comprising a wavelength conversion region and a non-wavelength conversion region, wherein the wavelength conversion region is used to convert the light beam emitted by the light emitting unit into a converted light beam, and the wavelength conversion region and the non-wavelength conversion region sequentially enter the light beam emission path of the light source module; The light source module performs a rotational motion so that the light beam emitted by the light emitting unit irradiates different positions of the wavelength conversion area or the non-wavelength conversion area.

2. The light source device according to claim 1, characterized in that: The plurality of light emitting units are distributed at intervals along the radial direction of the rotation track of the light source module.

3. The light source device according to claim 1, characterized in that: The total number of the wavelength conversion regions and the non-wavelength conversion regions is M, and the rotation frequency of the light source module is nM times the rotation frequency of the wavelength conversion device, where n is a positive integer.

4. The light source device according to claim 1, characterized in that: The light source device further comprises a collimating lens group, which is located on the outgoing light path of the wavelength conversion device. The light emitted from the wavelength conversion device is collimated by the collimating lens group before being emitted.

5. The light source device according to claim 4, characterized in that: The collimating lens group and the wavelength conversion device are arranged at intervals, and the collimating lens group and the light source module rotate synchronously.

6. The light source device according to claim 4, characterized in that: The collimating lens group is attached to the light emitting surface of the wavelength conversion device which is away from the light source module.

7. The light source device according to claim 4, characterized in that: The light source device further comprises a light-homogenizing component, which is located in the outgoing light path of the collimating lens group. The light emitted through the collimating lens group is then homogenized by the light-homogenizing component before being emitted.

8. The light source device according to claim 1, characterized in that: The light source module includes a connected substrate and a rotating shaft, the substrate is in a strip shape, the light emitting unit is fixed to the substrate along the length extension direction of the substrate, the rotating shaft is fixed to the end of the substrate, and the rotation of the rotating shaft drives the substrate to rotate.

9. The light source device according to claim 1, characterized in that: The light source module comprises a substrate and a rotating shaft connected to each other, the substrate is in a disc shape, the light emitting unit is fixed to the substrate along the radial direction of the substrate, and the rotating shaft is fixed to the center position of the substrate and drives the substrate to rotate.

10. A projection device, characterized in that: include: A spatial light modulator, the spatial light modulator comprising a light incident surface; as well as In the light source device according to any one of claims 1 to 9, the light source module is rotated so that the light-emitting unit is at a different position relative to the light incident surface, and at least a portion of the light emitted by the light-emitting unit is incident on the light incident surface.

11. The projection device according to claim 10, characterized in that: The light source module is selectively in a first state or a second state by rotating, all the light emitting units of the light source module in the first state are located in a first area, a part of the light emitting units of the light source module in the second state are located in the first area and another part of the light emitting units are located in a second area, the light emitted by the light emitting units located in the first area is irradiated to the light incident surface, and the light emitted by the light emitting units located in the second area is not irradiated to the light incident surface; The light source device further includes a processor, which controls the light-emitting unit located in the first area to emit light according to an image signal, and which controls the light-emitting unit located in the second area to turn off light according to the image signal.

12. The projection device according to claim 11, characterized in that: The processor controls the light-emitting unit located in the first area to emit light according to the image signal, including at least one of the following methods: The processor controls the brightness of the light emitting unit located in the first area at different time sequences according to the image signal; The processor controls the brightness of the light emitting units located at different positions of the first area according to the image signal.

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