CN206671745U - Light supply apparatus and optical projection system - Google Patents

Abstract

The utility model protects a light source device, which includes a first light source, a pair of fly-eye lenses, a light guide system and a wavelength conversion device; the first light source emits first excitation light, which is incident on the light guide system after being uniformly lighted by the fly-eye lens pair; the light guide The system guides the first excitation light to the wavelength conversion device; the wavelength conversion device includes a wavelength conversion section and a reflection section, the wavelength conversion section absorbs the first excitation light and emits the received light, and the first excitation light obliquely enters the reflection section and is The second excitation light is formed after reflection; the light guiding system is also used to collect the subject light and the second excitation light, and guide the subject light and the second excitation light to exit along the exit light channel; the light guide system includes a The optical path correction component reflects the second excitation light and makes its main optical axis coincide with the main optical axis of the received light; the fly-eye lens pair includes the first and second lens arrays arranged along the direction of the first excitation light, forming the first lens array Each lens unit overlaps and forms an image on the surface of the wavelength conversion device.

Description

Light source device and projection system

technical field

The utility model relates to the technical field of projection, in particular to a light source device and a projection system.

Background technique

In the existing projection technology field, it is a commonly used method to use semiconductor blue light laser to excite phosphor powder to generate red light and green light, and to use blue light emitted by semiconductor blue light laser itself, red light and green light to form three primary color light to modulate images. .

In the prior art, as shown in FIG. 1 , the light source device 10 includes a first light source 101, a uniform light device 102, an area beam splitter 103, a collecting lens 104, a fluorescent pink wheel 105, a first relay lens 106 and a second relay lens 106. Lens 108, mirror 107 and square rod 109.

The first light source 101 is a blue laser, and the blue excitation light emitted by it is homogenized by the homogenization device 102 , and then enters the area beam splitter 103 and is transmitted through the blue-transparent and yellow-transparent area of the area beam splitter 103 . The blue light is incident on the collecting lens 104 along the central axis of the collecting lens 104 , collected by the collecting lens 104 and incident on the fluorescent pink wheel 105 . The fluorescent pink wheel 105 includes a first section coated with red fluorescent powder, a second section coated with green fluorescent powder, and a third section with a scattering reflection function. The fluorescent pink wheel 105 rotates periodically, so that the first segment, the second segment and the third segment are located on the optical path of the blue light in time-sharing. The blue light excites the red phosphor to produce red fluorescence (stimulated by laser), the blue light excites the green phosphor to produce green fluorescence (stimulated by light), and the red fluorescence and green fluorescence are emitted in the form of Lambertian light; and the blue light is scattered and reflected by the third section, also Emitting in the form of Lambertian light, the etendue becomes larger. The red fluorescent light and the green fluorescent light pass through the collecting lens 104 and are reflected by the area beam splitter 103 ; while the blue light emitted in the form of Lambertian light, the blue light incident on the blue-transparent and yellow-reflecting region 1031 will be lost due to transmission. The red light, green light and the remaining blue light enter the square rod 109 through the relay lens 106 , the mirror 107 and the relay lens 108 , and finally exit from the exit end of the square rod 109 . Due to the lack of blue light in the central part of the light beam incident on the square rod 109, after exiting from the square rod 109, the distribution of the light spot surface at the exit of the square rod 109 has uneven color, and the central part is yellowish, which will lead to the final projection. The color of the screen is uneven.

In another prior art CN105278226A, as shown in FIG. 2, the light source device 100 includes a light source 110, a wavelength conversion module 120, a light combining unit 130, a light transfer module 140, and an integrating column 150, wherein the light combining unit 130 includes a light splitter 131 and reflector 133 . The blue laser BL emitted by the light source 110 enters the light transmission module 140 through the light splitter 131, and enters the wavelength conversion module 120 at an angle of θ through the light transmission module 140. The lenses are collected and directed to an integrating column 150 . In this technical scheme, the incident blue light and the outgoing blue light pass through the two parts of the light combining unit 130 of the same component, the transmission and reflection of the beam splitting part 131 and the reflecting part 133 respectively, causing the main optical axis of the blue light to deviate from the main optical axis of the outgoing light. The main optical axis of the red and green light emitted from the light combining unit 130 does not coincide with the main optical axis of the blue light, which will lead to uneven color of the light spot at the exit of the integrating column 150, resulting in uneven color of the final projected picture.

In addition, the wavelength conversion module 120 is arranged at the focal point of the light transmission module 140, so that the red and green light can be emitted in parallel. In this case, since the light emitted by the light source 110 cannot be strictly parallel light, there will always be a certain divergence angle, so the light source 110 must converge at a certain position for imaging after passing through the light transfer module 140, and the blue light beam passes through the light transfer module 140. The focal plane of 140 must be out of focus. The light in this out-of-focus state will inevitably form a spot with uneven surface distribution, and this spot not only leads to uneven blue light finally emitted by the light source device, but also causes uneven distribution of red and green receiving light due to different excitation optical densities. Furthermore, when the main optical axis of the incident blue light is slightly skewed, the spot center of the blue light on the wavelength conversion module 120 will deviate from the optical axis of the light transmission module 140, resulting in uneven distribution of the outgoing red, green and blue light.

Therefore, the technical solution of the prior art CN105278226A is not practical, which is also the reason why this technology has been delayed in being applied to actual products.

Utility model content

Aiming at the defect of poor color uniformity of the light source device in the prior art, the utility model provides a light source device with uniform color distribution of outgoing light.

The basic concept of the utility model is: under the premise that the excitation light is obliquely incident on the wavelength conversion device, a uniform and stable spot is formed on the wavelength conversion device by using the uniform light and imaging principle of the fly-eye lens pair. The imaging relationship of the wavelength conversion device is established, even if the light incident on the fly-eye lens pair is deflected, it will not affect the spot position and uniformity on the surface of the wavelength conversion device. This concept solves the problem of spot uniformity when the beam enters obliquely and exits obliquely.

This idea was produced under the background of oblique incidence of the excitation light beam. This is because, in the conventional technical solutions where the excitation light is vertically incident on the wavelength conversion device, the center of the spot is always on the optical axis of each lens and other optical elements. It is necessary to consider the problem of the spot shifting in the direction perpendicular to the optical axis; and the oblique incidence of the excitation light beam creates a new problem, that is, at different positions along the optical axis of the lens, the spot shifting light on the section perpendicular to the optical axis The distances of the axes are different, and the deflection angles of the light incident from different positions of the lens are different, making it difficult to obtain a uniform spot on the surface of the wavelength conversion device.

Specifically, the utility model provides a light source device, including a first light source, a fly-eye lens pair, a light guiding system, and a wavelength conversion device; the first light source is used to emit a first excitation light, and the first excitation light passes through The fly-eye lens pair is incident on the light guide system after uniform light; the light guide system is used to guide the first excitation light to the wavelength conversion device; the wavelength conversion device includes a wavelength conversion section and a reflector section, the wavelength conversion device moves periodically so that the wavelength conversion section and the reflection section are time-divided and periodically located on the optical path of the first excitation light, and the wavelength conversion section absorbs the first excitation light And emit the subject light, the first excitation light is obliquely incident on the surface of the reflection section, and is reflected to form the second excitation light; the light guiding system is also used to collect the subject light and the second excitation light, And guide the subject light and the second excitation light to exit along the exit light channel; the light guiding system includes an optical path correction component, the optical path correction component is located on the optical path of the second excitation light, and is used to reflect the second excitation light, and make the main optical axis of the reflected second excitation light coincide with the main optical axis of the subject light; the fly-eye lens pair includes a first lens array and a second lens array arranged in sequence along the direction of the first excitation light Two lens arrays, each lens unit forming the first lens array overlaps and forms an image on the surface of the wavelength conversion device.

In one embodiment, a beam angle reflection sheet is included, located on the optical path between the first light source and the pair of fly-eye lenses, for changing the direction of the first excitation light so that The angle between the first reflected excitation light and the axis of the fly-eye lens is larger than 0° and not more than 2°.

In one embodiment, the light guiding system further includes a collection lens, configured to converge the first excitation light into the wavelength conversion device, and collect the stimulated light and the emitted light from the wavelength conversion device. The second excitation light; the distance between the edge of the beam of the first excitation light incident on the collection lens and the central axis of the collection lens is 0.2-0.5 mm.

In one embodiment, it further includes a filter wheel, the filter wheel includes a diffuse transmission section, and when the reflective section of the wavelength conversion device emits the second excitation light, the diffuse transmission section is located at the first The optical path of the second excitation light is used to scatter the second excitation light.

In one embodiment, the optical path correction component includes an angular distribution correction element, which is used to converge or diverge the second excitation light, so that the distance between the second excitation light and the subject light along the beam propagation direction The imaging positions coincide.

In one embodiment, the optical path correction component includes a concave reflective surface or a combination of a planar reflective surface and a convex lens, from the wavelength conversion device to the overlapping position of the second excitation light and the subject light, the first The optical path of the second excitation light is shorter than the optical path of the subject light; or the optical path correction component includes a convex reflective surface or a combination of a planar reflective surface and a concave lens, from the wavelength conversion device to the second excitation light and the second excitation light The overlapping position of the subject light, the optical path of the second excitation light is longer than the optical path of the subject light.

In one embodiment, the optical path correction component is fixed on the reflection section of the wavelength conversion device, and is used to reflect the first excitation light into the second excitation light.

In one embodiment, the optical path correction component is in the shape of a concave curve or a straight line on the axial section of the wavelength conversion device.

In one embodiment, it also includes a second light source for emitting compensation light and a compensation light guiding component, the compensation light guiding component is arranged on the outgoing light path of the received light, and the compensation light has the same For overlapping wavelength ranges, the compensation light and the received light are combined through the compensation light guiding component.

The utility model also provides a projection system, which includes the light source device described in any one of the above, and also includes a light modulation device and a lens device.

Compared with the prior art, the utility model makes the first excitation light obliquely incident on the surface of the reflection section of the wavelength conversion device through the guidance of the light guide system, so that the reflected second excitation light is separated from the optical path of the first excitation light. It will not return along the original path of the first excitation light, thereby avoiding the loss of part of the second excitation light along the optical path of the first excitation light, effectively improving the light utilization rate; correcting the reflection of the component through the optical path of the light guiding system , correcting the principal optical axis position and spot imaging position of the second excitation light, and changing the imaging position of the spot of the second excitation light perpendicular to its optical path direction, so that the second excitation light and the subject light can have the same Spatial distribution uniformity; by setting fly-eye lens pairs between the first light source and the light guiding system, each lens unit of the first lens array of the fly-eye lens pair is overlapped and imaged on the surface of the wavelength conversion device, so that the light spot on the surface of the wavelength conversion device is The superimposition of the imaging spots of each lens unit of the first lens array ensures the uniformity of the spots, and the fly-eye lens pair still ensures that the imaging position remains unchanged when the incident light is deflected at a small angle, avoiding the first-order failure caused by installation errors and other factors. The problem of deviation of the position of the light spot caused by the deflection of the excitation light further ensures the uniformity of the distribution of the light emitted by the light source device.

Description of drawings

Fig. 1 is a schematic structural diagram of a light source device in the prior art.

FIG. 2 is a schematic structural diagram of another light source device in the prior art.

FIG. 3 is a schematic structural diagram of a light source device according to Embodiment 1 of the present invention.

Fig. 4 is a schematic diagram of the angle correction principle of the fly-eye lens pair.

FIG. 5 is a schematic structural diagram of a light source device according to Embodiment 2 of the present invention.

FIG. 6 is a schematic structural diagram of a wavelength conversion device of the present invention.

Fig. 7 is a schematic structural diagram of a light source device according to Embodiment 3 of the present invention.

FIG. 8 is a schematic structural diagram of a light source device according to Embodiment 4 of the present invention.

FIG. 9 is a schematic structural diagram of a light source device according to Embodiment 5 of the present invention.

FIG. 10A is a schematic structural diagram of a light source device according to Embodiment 6 of the present invention.

FIG. 10B is a schematic structural diagram of a first light splitting component of the light source device in FIG. 10A .

FIG. 10C is a schematic structural diagram of a modified embodiment of the light source device in FIG. 10A .

Fig. 11 is a schematic structural diagram of a light source device according to Embodiment 7 of the present utility model

detailed description

In this utility model, the descriptions involving "first", "second", "third" and so on are only for descriptive purposes, for the convenience of description, and cannot be understood as indicating or implying their relative importance or implicitly indicating The number of technical characteristics indicated. Thus, features defined as "first", "second", and "third" may explicitly or implicitly include at least one of these features.

In the present invention, the main optical axis of the light beam can be understood as the central axis of the light beam, and the direction of the main optical axis is the forward direction of the light beam.

In the present invention, the "coincidence" of the main optical axes of the two beams of light can be understood as not coincidence in an absolute sense, but roughly coincidence/coincidence within the range of precision error. Those skilled in the art can understand that on the basis of the technical solution provided by the utility model, the technical solution that makes the main optical axes of the two beams of light parallel and the distance is smaller than the threshold also belongs to the scope of protection of the utility model, and the technical solution is also It can be called "coincidence within error".

The embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings and implementation methods.

Example part

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of a light source device according to Embodiment 1 of the present utility model. The light source device includes a first light source 201 , a pair of fly-eye lenses 202 , a light guiding system and a wavelength conversion device 206 , wherein the light guiding system includes a first light splitting component 204 , a collecting lens 205 , a relay lens 207 and an optical path correction component 209 . In addition, the light source device further includes an integrating rod 212 .

In this embodiment, the first light source 201 emits the first excitation light L1, and the first excitation light L1 is homogenized by the fly-eye lens pair 202 and then enters the light guide system, and is guided to the wavelength conversion device 206 by it. Specifically, the first excitation light L1 is transmitted through the first region of the first light splitting component 204 of the light guiding system, and then is converged by the collecting lens 205 to enter the wavelength conversion device 206 .

The wavelength conversion device 206 includes a wavelength conversion section and a reflection section. The wavelength conversion device 206 moves periodically, so that the reflective section and the wavelength conversion section are located on the optical path of the first excitation light L1 time-divided and periodically. Wherein, the wavelength conversion section absorbs the first excitation light L1 and emits the received light L3, and the first excitation light L1 is obliquely incident on the surface of the reflection section, and is reflected to form the second excitation light L2. The wavelength conversion section includes a wavelength conversion material or a wavelength conversion structure capable of absorbing the excitation light and emitting the excitation light with a wavelength different from that of the excitation light. Under the action of the wavelength conversion section, the received light is approximately Lambertian distributed, and the direction of the main optical axis is perpendicular to the wavelength conversion section, while the reflection section does not change the angular distribution of the excitation light. The first excitation light and the second excitation light The angular distribution of the light is roughly the same, and the second excitation light L2 exits symmetrically with respect to the first excitation light L1, and the exit direction is not perpendicular to the reflection section, so the principal optical axes of the subject light L3 and the second excitation light L2 do not coincide, and the two propagate along two different optical paths.

The light guiding system is also used to collect the subject light L3 and the second excitation light L2, and guide the subject light L3 and the second excitation light L2 to exit along the exit light channel, as follows.

When the wavelength conversion section of the wavelength conversion device 206 is on the optical path of the first excitation light L1, the subject light L3 exits from the wavelength conversion section, is collected by the collecting lens 205 and transmitted to the first light splitting assembly 204, the first light splitting assembly 204 has different transmission and reflection characteristics for the first excitation light L1 and the subject light L3, so that the subject light is reflected and guided to exit along the exit light channel.

When the reflective section of the wavelength converting device 206 is on the optical path of the first excitation light L1 , the second excitation light L2 emerges from the reflective section, is collected by the collecting lens 205 and transmitted to the second region of the first beam splitting component 204 . The wavelength of the second excitation light L2 is the same as that of the first excitation light L1 , and the second excitation light L2 is transmitted through the second region of the first light splitting component 204 and transmitted to the optical path correction component 209 . In this embodiment, the regions where the first excitation light L1 and the second excitation light L2 are incident on the first light splitting component 204 do not overlap (the first region and the second region do not overlap), so the second excitation light L2 does not An incident light path of the excitation light L1 returns to the first light source 201 in the reverse direction. The optical path correction component 209 is located on the optical path of the second excitation light L2, and the second excitation light L2 incident on the optical path correction component 209 is reflected by the reflective surface of the optical path correction component 209, so that the main optical axis of the reflected second excitation light L2 is in line with the The principal optical axes of the received light L3 coincide. The reflected second excitation light L2 is transmitted through the first light splitting component 204 again, and is combined with the light receiving light L3 at the exit position of the first light splitting component 204 (referring to the coincidence of the optical paths of the two, in fact, the two are separated in time are staggered), and the incident light is converged by the relay lens 207 to the integrating rod 212.

As mentioned above, the first excitation light L1 and the second excitation light L2 are symmetrical. From the analysis of the symmetry of the optical path, the light beam incident on the collection lens 205 and the reflected light beam exiting the collection lens 205 are symmetrical about their central axis. Therefore, when the first excitation light L1 is away from the central axis of the collecting lens 205 , the second excitation light L2 is also away from the central axis. Although the separation of the two beams of light can provide a larger space for optical design and structural design, due to the fact that the larger the field of view is, the worse the imaging quality will be in practical applications. When the first excitation light L1 incident on the collection lens 205 is far away from When the lens 205 is on the central axis, its imaging quality on the surface of the wavelength conversion device 206 is poor, resulting in uneven illumination of the spot. When the spot is used to excite the phosphor, the excitation efficiency of the phosphor will be greatly reduced. In consideration of spot imaging aberration and uniformity, we hope that the incident first excitation light L1 can be as close as possible to the central axis of the collecting lens 205, or that the first excitation light L1 and the second excitation light L2 can be as close as possible, but Also, the first excitation light L1 cannot be overlapped with the second excitation light L2 emitted by the collecting lens 205 and the optical path correction component 209 .

In this embodiment, a fly-eye lens pair is arranged in front of the light-guiding system to adjust the first excitation light L1 incident on the fly-eye lens pair, thereby adjusting and correcting the direction of the first excitation light L1 incident on the light-guiding system.

Figure 4 is a schematic diagram of the angle correction principle of the fly-eye lens pair, and the fly-eye lens pair has a good effect of correcting the optical path. When the light beam 1 is incident parallel to the optical axis of the fly-eye lens pair, the direction of the main optical axis of the outgoing light remains unchanged and is still parallel to the optical axis of the fly-eye lens pair; when the light beam 2 is incident along the optical axis of the fly-eye lens pair at an angle α , the main optical axis of the outgoing light beam 2 forms an angle β with the optical axis of the fly-eye lens pair, α>β. That is, the fly-eye lens pair has the function of reducing the inclination angle of the beam, for example, when α is about 1°, β is about 0.2°. By adjusting the size of α, the size of the outgoing light angle β can be adjusted, and the adjustment accuracy is higher than that of directly adjusting β, so that the beam edge of the first excitation light L1 incident on the collection lens 205 can be aligned with the central axis of the collection lens 205 spacing is reduced as much as possible. In the practical application of the utility model, the technical scheme can be used to control the distance between the edge of the beam of the first excitation light L1 incident on the collecting lens 205 and the central axis of the collecting lens 205 within the range of 0.2-0.5mm, which greatly improves the wavelength. The spot imaging quality on the surface of the conversion device 206 provides a basic condition for uniform distribution of light on the entire output surface of the light source device.

In addition to the role of angle correction, the fly-eye lens pair also has the function of making the spot image uniform. In this embodiment, the fly-eye lens pair 202 includes a first lens array and a second lens array arranged in sequence along the direction of the first excitation light L1, wherein the first lens array and the second lens array are respectively composed of a plurality of one-to-one corresponding lens units The optical axes of the two lens arrays are parallel, and the focal points of the lens units in the first lens array coincide with the centers of the corresponding lens units in the second lens array. Each lens unit of the second lens array superimposes and images the corresponding lens unit of the first lens array at an infinite distance position, and then the superimposed image at the infinite distance position is superimposed on the surface of the wavelength conversion device 206 through the action of other lenses in the light source device imaging. In simple terms, each lens unit constituting the first lens array overlaps and forms an image on the surface of the wavelength conversion device. By superimposing the imaging spots of each lens unit, this technical solution eliminates and compensates the possible influence of the inhomogeneity of individual spots on the total spot, and provides a guarantee for uniformly distributed light on the exit surface of the entire light source device. In addition, since it is an imaging process from the fly-eye lens pair to the surface of the wavelength conversion device, once the imaging relationship is established, the object, image and lens are determined, even if the light incident on the fly-eye lens pair is deflected, it will not affect the wavelength conversion device surface. The position and uniformity of the spot will be affected (only the light distribution of the beam before or after the imaging position will be affected).

The above is the basic technical solution of Embodiment 1 of the utility model. On this basis, each component of the light source device of the utility model can derive a variety of specific technical solutions according to the actual application environment, and the technical solutions can be combined with each other. , an example is given below.

In one embodiment, the first light source 201 can be a blue laser or a blue laser array, the first excitation light L1 is a blue laser, the laser light has a small divergence angle, a concentrated beam, and a Gaussian distribution, so that the reflected second The excitation light L2 can easily distinguish the optical path from the first excitation light L1. In another embodiment, the first light source 201 may be an LED emitting blue light, and the first excitation light is blue LED light. The present invention does not limit this, but the first excitation light is preferably light with a small divergence angle.

In this embodiment, the wavelength conversion device 206 is a wheel structure (fluorescent color wheel), and the wavelength conversion section and the reflective section are arranged in a fan ring on the wheel structure, and are driven by a driving device (such as a motor). Rotate around the central axis of the roulette. In another embodiment, the wavelength conversion device can also be a fluorescent color bucket/color cylinder, including wavelength conversion sections and reflection sections distributed around the surface of the bucket/tube, and the color bucket/color cylinder rotates around its axis to Make different sections under the irradiation of excitation light periodically according to time sequence; or, the wavelength conversion device can also be a fluorescent color plate, including wavelength conversion sections and reflection sections arranged in sequence along a straight line, and the color plate is along the straight line The direction is linearly vibrated, so that different sections are periodically irradiated by the exciting light according to the time sequence, so as to emit time-sequential light.

In one embodiment, the wavelength conversion section of the wavelength conversion device 206 includes a fluorescent material layer, and the fluorescent material layer can be a phosphor powder-organic adhesive layer (separated by organic adhesives such as silica gel and epoxy resin). Phosphor powder is bonded into a layer), it can also be a phosphor powder-inorganic adhesive layer (the separated phosphor powder is bonded into a layer through an inorganic adhesive such as glass), and it can also be a fluorescent ceramic (including ① continuous ceramic As the matrix and the structure of phosphor particles distributed in the ceramic; ②Pure-phase ceramics doped with activator elements, such as Ce-doped YAG ceramics; ③On the basis of pure-phase ceramics doped with activator elements, dispersed in the ceramic phosphor particles). In another embodiment, the wavelength conversion section includes a quantum dot layer, and the photoluminescent function is realized through the quantum dot material. The wavelength conversion device 206 may have only one wavelength conversion section (such as a yellow wavelength conversion section), or may have two wavelength conversion sections (such as a green wavelength conversion section and a red wavelength conversion section), or may include more than two wavelength conversion sections. wavelength conversion section.

In one embodiment, the reflective section of the wavelength conversion device 206 includes a metal reflective surface, which mirrors the excitation light. In another embodiment, the reflective section includes a dielectric reflective film (dielectric reflecting film) for specular reflection of the excitation light. In other embodiments of the present invention, the reflective section may also adopt other reflective structures to reflect the excitation light.

In this embodiment, the reflection surface of the reflection section of the wavelength conversion device 206 is parallel to the motion plane of the wavelength conversion device 206 , that is, the rotation axis of the fluorescent color wheel is perpendicular to the reflection surface of the reflection section. In order to realize that the first excitation light is incident on the surface of the wavelength conversion device in the form of oblique incidence (when the reflection section is located on the optical path of the first excitation light, the reflection surface of the reflection section is the surface of the wavelength conversion device), the first excitation light Incident to the collection lens 205 at a position deviated from the center of the collection lens 205 , the first excitation light is changed by the collection lens 205 in a light transmission direction, so that it is obliquely incident on the surface of the wavelength conversion device. Subsequently, the second excitation light reflected from the reflective section is incident on the collecting lens 205 . Between the collecting lens 205 and the wavelength conversion device 206, the first excitation light L1 and the second excitation light L2 form a "V"-shaped optical path.

In this embodiment, the first light splitting component 204 is a filter/filter film/dichroic plate that transmits the excitation light (including the first excitation light and the second excitation light) and reflects the received light. Assembly 204 is large enough to allow light from collection lens 205 to be reflected toward relay lens 207, and to allow for a first and second area separated from each other that is large enough for the first excitation light and the second excitation light, respectively. transmission.

In this embodiment, the optical path correction component 209 includes a plane reflective surface, which is realized by coating a metal reflective film on a substrate. In other implementation manners, it may also be realized by plating a dielectric reflection film or the like.

In one embodiment, the collection lens 205 may be composed of multiple lenses.

In one embodiment, the relay lens 207 may be formed by a combination of multiple lenses, such as a combination of a concave lens and a convex lens. It can be understood that the relay lens is not a necessary component of the light source device of the present invention.

In this embodiment, the outgoing light from the relay lens 207 is incident on the incident surface of the integrator rod 212 . In other implementation manners, the integrating rod 212 can also be replaced with other light homogenizing devices. In some other implementation manners, the integrating rod 212 can also be omitted, so that the outgoing light directly enters the subsequent optical elements, which is not limited by the present invention.

Example two

Please refer to FIG. 5 , which is a schematic structural diagram of a light source device according to Embodiment 2 of the present invention. The light source device includes a first light source 201, a pair of fly-eye lenses 202, a light guiding system, and a wavelength conversion device 206, wherein the light guiding system includes a first light splitting component 204, a collection lens 205, a first relay lens 207, and a second relay lens 210, a reflective sheet 208 and an optical path correction component 209a. In addition, the light source device further includes an integrator rod 212 , a filter wheel 211 and a beam angle reflector 214 .

Compared with Embodiment 1, this embodiment has several differences, and each difference can exist as an independent feature and be combined with Embodiment 1 or other modified embodiments to form an implementable technical solution of the present utility model.

First of all, the first point is different. The first excitation light L1 emitted by the first light source 201 in the first embodiment is directly incident on the fly-eye lens pair 202. to adjust the angle. In this embodiment, a beam angle reflection sheet 214 is provided between the first light source 201 and the fly-eye lens pair, and the first excitation light L1 is reflected by the beam angle reflection sheet 214 and then enters the fly-eye lens pair 202 . The light beam angle reflector 214 can be adjusted before the light source device leaves the factory, so as to control the angle at which the first excitation light L1 is incident on the fly-eye lens pair 202, so that the first excitation light L1 is as close as possible to the central axis of the collection lens 205, and then passes through the point Fix the light beam angle reflector 214 by means of glue or the like. The technical solution improves the product yield of the light source device, simplifies the production process, and has very important practicability.

In one embodiment, the beam angle reflection sheet 214 is rotated at a certain angle on the basis of the original position of the first excitation light L1 emitted by the first light source 201 at 45°, so that the first excitation light L1 passes through the beam angle reflection sheet 214. The angle between the incident and outgoing rays is greater than 90°. This technical solution tilts the light beam, reducing the possibility that the light beam overlaps with the optical path correction component 209a. In addition, as long as the position of the fly-eye lens pair does not move, only the path that the light passes through during the imaging process moves, which will not have a significant impact on the imaging quality.

In one embodiment, the beam angle reflection sheet 214 is rotated by no more than 1° relative to 45°, so that the angle between the incident light and the exit light of the first excitation light on the beam angle reflection sheet 214 is greater than 90° and not more than 92°, that is, , so that the angle between the first excitation light reflected by the beam angle reflection sheet 214 and the axis of the fly-eye lens pair is greater than 0° and not more than 2°, and the direction of the first excitation light is emitted in a direction away from the central axis of the collection lens 205 , within this angle range, the outgoing light has good uniformity. If the angle of rotation of the light beam angle reflector 214 is too large, so that the inclination angle of the reflected light exceeds the allowable range of the fly-eye lens pair F#, the one-to-one correspondence between the first lens array and the second lens array of the fly-eye lens pair is broken, resulting in side lobe. In this embodiment, since the beam angle reflector 214 changes the inclination angle of the first excitation light L1 incident on the collection lens 205 , the inclination angle of the second excitation light L2 emitted through the collection lens 205 also changes. In order to make the main optical axes of the second excitation light L2 and the subject light L3 coincide, the placement angle of the optical path correction component 209a is also changed, so that the second excitation light incident on the optical path correction component 209a and the second excitation light emitted from the optical path correction component 209a The included angle of the excitation light is greater than 90°.

Secondly, the second point is different, the filter wheel 211 is added in this embodiment. In this embodiment, the optical path from the fly-eye lens pair 202 to the first relay lens 207 is basically the same as that in Embodiment 1 (except for the part of the optical path correction component 209a to be described next), the difference is that the optical path from the first relay lens Before entering the integrator rod 212 , the light at 207 is reflected by a reflector 208 to change direction, and then enters the filter wheel 211 through the second relay lens 210 , and the light transmitted through the filter wheel 211 enters the integrator rod 212 .

In this embodiment, the filter wheel 211 includes a diffuse transmission section and a color correction transmission section. Among them, the scattering transmission section is used to scatter the second excitation light L2, so that the divergence angle of the second excitation light L2 is consistent with the divergence angle of the receiving light L3, and the scattering transmission section can be realized by setting a scattering sheet; color correction The transmission section is used to modify the color of the received light, so that the color coordinates of the transmitted received light meet the requirements of the outgoing light of the light source device. The color correction and transmission section can be realized by setting a wavelength filter. The filter wheel 211 is driven by a driving device (such as a motor) to rotate periodically, so that the filter wheel 211 is synchronized with the wavelength conversion device 206, so that each section of the filter wheel 211 and each section of the wavelength conversion device 206 One to one correspondence. Specifically, when the wavelength conversion device 206 emits the received light, the color correction and transmission section of the filter wheel 211 is located on the optical path of the received light; when the wavelength conversion device 206 emits the second excitation light, the scattering transmission section of the filter wheel 211 The segment is located on the optical path of the second excitation light. Since the excitation light is scattered by a general scattering sheet, the angular distribution of the excitation light is Gaussian scattering, which is different from the angular distribution of the subject light. Therefore, in order to make the angular distribution of the excitation light consistent with the subject light, in some embodiments , the scattering transmission section is equipped with a Top-hat type scattering sheet (that is, the angular distribution after scattering is roughly in the shape of "J", and the shape is like a top hat, so it is called top-hat) or a single-row compound eye structure arranged in a hexagon. In the utility model, since the reflection section of the wavelength conversion device 206 does not scatter and reflect the excitation light, the light distribution of the excitation light is quite different from the light distribution of the received light, and setting the scattering transmission section of the filter wheel can improve the The difference in light distribution.

Specifically, the filter wheel 211 and the wavelength conversion device 206 in this embodiment are provided coaxially and integrally, and are driven by the same driving device to rotate around the same axis. As shown in FIG. 6, the wavelength conversion device 206 includes a fan-shaped reflective section 2061, a red wavelength conversion section 2062, and a green wavelength conversion section 2063, and the filter wheel 211 includes a fan-shaped scattering transmission section 2111, a red wavelength conversion section 2111, and a red wavelength conversion section. color transmission section 2112 and green color correction transmission section 2113. Wherein, the circular sector angle of the reflective section 2061 is the same as that of the scattering transmission section 2111, the circular sector angle of the red wavelength conversion section 2062 is the same as that of the red color correction transmission section 2112, and the circular sector angle of the red wavelength conversion section 2112 is the same. The sector angle of segment 2063 is the same as the sector angle of green color correction transmission segment 2113 . In this embodiment, the reflection area 2061 and the scattering transmission area 2111 are set opposite to each other at 180°. This technical solution makes the distance between the reflection area 2061 and the scattering transmission area 2111 the farthest, and there is enough space for optical elements in the middle optical path. Certainly, in other implementation manners, the reflection area and the scattering transmission area may also be arranged at any angle of 0-180°, which is not limited by the present invention.

It can be understood that the filter wheel and the wavelength converting device can also be arranged independently, driven by different driving devices respectively, and their positions do not have to be arranged on the same plane. Moreover, the filter wheel is not an essential component of the light source device of the present invention. In application scenarios where the requirements for the color coordinates or angular distribution of the emitted light are relatively low, or the color coordinates of the emitted light of the light source itself are close to the requirements, the filter wheel can also be omitted. The utility model does not limit this.

Again, the third point is different, the optical path correction component 209 in the first embodiment is a plane reflective surface, but in this embodiment, the optical path correction component 209a includes a convex reflective surface, the convex reflective surface faces the second excitation light, and the second excitation light The second is to stimulate light reflection, change the angular distribution of the beam, and diverge the beam. The position of the optical path correction component 209 a is the same as that in the first embodiment, and is also arranged on the side of the first light splitting component 204 away from the wavelength converting device 206 .

In this embodiment, the function of the optical path correction component 209a is not only to make the main optical axis of the second excitation light L2 coincide with the main optical axis of the subject light L3 through reflection, but also to change the beam angle distribution of the second excitation light to adjust the light beam. Diverge.

In this embodiment, the optical path correction component 209a is arranged on the side of the first light splitting component 204 away from the wavelength conversion device 206, and the second excitation light from the optical path correction component 209a passes through the first light splitting component 204 and is aligned with the main optical axis of the receiving light. coincide. Relative to the subject light, the optical path of the second excitation light from the wavelength conversion device 206 to the overlapping position of the two lights (here still refers to the coincidence of the spatial positions of the two lights, the actual two lights are staggered in time) is longer than that of the subject light. The optical path of the second excitation light from the wavelength conversion device 206 to the incident surface of the integrator rod 212 is longer than the optical path of the receiving light from the wavelength conversion device 206 to the incident surface of the integrator rod 212 . Consider the optical element between the wavelength conversion device and the integrating rod as an imaging device, then according to the imaging formula 1/u+1/v=1/f, if the imaging position of the second excitation light and the subject light are to be the same, then It is necessary to increase the focal length f of the imaging device of the second excitation light, and this function can be realized by adding a concave lens or a convex mirror on the optical path of the second excitation light. The optical path correction component 209a of this embodiment includes a convex reflective surface, which increases the imaging focal length of the second excitation light from the wavelength conversion device to the integrating rod, so that the second excitation light and the received light can be imaged at the same position, thereby ensuring the light source The uniformity of the spatial distribution of light emitted by the device.

In one embodiment, the convex reflective surface of the optical path correction component 209a is a convex structure coated with a metal reflective film. In other implementation manners, it may also be realized by plating a dielectric reflection film or the like.

For the optical processing of the light beam and the light beam transmission process of the optical elements not described in this embodiment, reference may be made to the description of the first embodiment above, and details will not be repeated here.

The third part of the embodiment

Please refer to FIG. 7 , which is a schematic structural diagram of a light source device according to Embodiment 3 of the present invention. The light source device includes a first light source 201, a pair of fly-eye lenses 202, a light guiding system, and a wavelength conversion device 206, wherein the light guiding system includes a first light splitting component 204, a collection lens 205, a first relay lens 207, and a second relay lens 210, a reflective sheet 208 and an optical path correction component 209b. In addition, the light source device further includes an integrator rod 212 , a filter wheel 211 and a beam angle reflector 214 .

The difference between this embodiment and the third embodiment lies in that the type and position of the optical path correction component 209b have changed.

In this embodiment, the optical path correction component 209b is an optical element including a concave reflective surface, which is arranged on the side of the first light splitting component 204 close to the wavelength conversion device 206, and the second excitation light emitted by the reflection section of the wavelength conversion device 206 It does not enter the first light splitting component 204, but is directly reflected by the concave reflective surface of the optical path correction component 209b. Moreover, the optical path correction component 209b can transmit the received light, which can be realized by coating the concave surface of the transparent medium with a filter film that transmits the excitation light and reflects the second excitation light.

In this embodiment, the second excitation light L2 is reflected by the optical path correction assembly 209b before reaching the first beam splitting assembly 204, and coincides with the main optical axis optical path of the subject light L3 after reflection, so that the second excitation light The optical path from the wavelength conversion device 206 to the coincident position of the two lights is shorter than the optical path of the received light from the wavelength conversion device 206 to the coincident position of the two lights, therefore, the spot image of the reflection section of the wavelength conversion device 206 is incident on the integrator rod 212 The optical path of the surface is shorter than the optical path of the light spot in the wavelength conversion section of the wavelength conversion device 206 imaging to the incident surface of the rod integrator 212 . According to the imaging formula 1/u+1/v=1/f, if the imaging position of the second excitation light and the subject light are to be the same, the imaging focal length f of the second excitation light needs to be reduced. By arranging the optical path correction component 209b including a concave reflective surface, the imaging focal length is reduced, so that the second exciting light and the receiving light can be imaged at the same position, thereby ensuring the uniformity of spatial distribution of the emitted light from the light source device.

Compared with the above-mentioned technical solution in which the optical path correction component includes a convex reflective surface in the second embodiment, in the technical solution of this embodiment, part of the received laser light needs to pass through the optical path correction component, which inevitably affects the uniformity of the received laser light. However, since the second excitation light is light with a small divergence angle and the area of the optical path correction component is small, the technical solution of this embodiment can also be accepted in some applications with relatively low requirements.

Embodiments In the present embodiment and the second embodiment, the optical path correction component includes a curved reflective surface, and the common point is that the angular distribution of the light beam can be adjusted. In the utility model, the process of light from the wavelength conversion device 206 to the incident surface of the integrating rod 212 is actually the process of the light spot imaging on the surface of the wavelength converting device 206 to the incident surface of the integrating rod 212 (the integrating rod can also be replaced by other optical devices, At the same time, the light spot on the surface of the wavelength conversion device is imaged to the incident surface of the replaced optical device). Since the optical paths of the second excitation light L2 and the subject light L3 are different before the main optical axis coincides, and the optical paths of the two are different, the imaging positions of the two excitation light L2 and the subject light L3 do not overlap after the optical paths coincide after passing through the same optical device, resulting in a difference between the two The spatial uniformity of a kind of light is relatively poor (because the light spot on the wavelength conversion device as "object" is uniform, and the light spot whose imaging position deviates from the integrator rod 212 is in a defocused state on the incident plane of the integrator rod 212, then the light spot must be uneven). By adding an optical path correction component with a beam angle distribution adjustment function, one more convergence or divergence of the second excitation light can be added, so that the imaging position of the second excitation light can coincide with the imaging position of the receiving light.

In other embodiments of the present invention, the curved reflective surface structure of the optical path correction component can be replaced by a combination of a flat reflective surface and a lens to achieve the same function. In one embodiment, the convex reflective surface is replaced by a combination of a planar reflective surface and a concave lens, so that the second excitation light can first pass through the concave lens and then be incident on the planar reflective surface, or the second excitation light can be reflected by the planar surface first. reflected by the surface, and then transmitted through the concave lens. In another embodiment, the concave reflective surface is replaced by a combination of a planar reflective surface and a convex lens, so that the second excitation light can first pass through the convex lens and then be incident on the planar reflective surface, or the second excitation light can be first transmitted by the planar reflective surface. Reflected by the reflective surface, then transmitted through the convex lens.

It can be understood that on the basis of the curved reflective surface, one or more planar reflective surfaces can be further added to form an optical path correction component together with the curved reflective surface, as long as the main optical axis of the second excitation light after the last reflection is aligned with the subject light The principal optical axes of the

Above, structures such as convex reflective surface, planar reflective surface, convex lens + planar reflective surface, concave lens + planar reflective surface can be collectively referred to as angular distribution correction elements, which are used to emit or converge light beams, and their functions are to make the second excitation light It coincides with the imaging position of the subject laser along the direction of beam propagation.

For the optical processing of the light beam and the beam transmission process of the optical elements not described in the third part of the embodiment, refer to the description of the first embodiment above, and will not be repeated here.

Four parts of the embodiment

Please refer to FIG. 8 . FIG. 8 is a schematic structural diagram of a light source device in Embodiment 4 of the present invention (for clarity of description, this embodiment does not draw the light path of the receiving light L3 as in Embodiment 1). The light source device includes a first light source 201, a pair of fly-eye lenses 202, a light guiding system and a wavelength conversion device 206, wherein the light guiding system includes a first light splitting component 204, a collecting lens 205, a relay lens 207 and an optical path correction component 209c. In addition, the light source device further includes an integrating rod 212 .

This embodiment is a modified embodiment of Embodiment 1. The difference from Embodiment 1 is that the optical path correction component 209c in this embodiment is located on the reflection section of the wavelength conversion device 206 (the wavelength conversion section does not have this component), the optical path correction component 209c includes a reflective surface, which is a part of a conical surface, and is not parallel to the movement plane of the wavelength conversion device 206, but has an inclination angle, so that the reflected second excitation light L2 can Directly coincides with the principal optical axis of the receiving light. This technical solution integrates the optical path correction component 209c into the wavelength conversion device 206, so that the reflective surface of the optical path correction component 209c also serves as the reflection section of the wavelength conversion device 206, making the structure of the device more compact and making the optical path design more flexible changeable.

In one embodiment, the optical path correction component 209c is integrally formed with the color wheel substrate of the wavelength conversion device 206 . In another embodiment, the optical path correction component 209c is fixed on the wavelength conversion device 206 by bonding or buckling.

Embodiment five parts

Please refer to FIG. 9 . FIG. 9 is a schematic structural diagram of a light source device according to Embodiment 5 of the present invention. The light source device includes a first light source 201, a pair of fly-eye lenses 202, a light guiding system and a wavelength conversion device 206, wherein the light guiding system includes a first light splitting component 204, a collecting lens 205, a relay lens 207 and an optical path correction component 209d.

This embodiment is a modified embodiment of Embodiment 4. The difference of this embodiment is that the optical path correction component 209d replaces the 209c in FIG. 8 . Wherein, the reflective surface of the optical path correction component 209d is a concave curve in the axial section of the wavelength conversion device, which is different from the straight line of 209c.

In this embodiment, since the optical path correction component 209d protrudes from the surface of the wavelength conversion device 206, the optical path of the second excitation light L2 is shortened, and a concave surface needs to be added to converge it to ensure that the spots of the second excitation light and the received light can be imaged at the same location.

At the same time, in this embodiment, since the second excitation light L2 is converged by the optical path correction assembly 209d before entering the first beam splitting assembly 204, the cross-sectional area of the light beam is relatively reduced, so that the first excitation light L1 Compared with Embodiment 4, it can be closer to the central axis of the collecting lens 205, or make it less likely that the first excitation light L1 and the second excitation light L2 will overlap in Embodiment 5 compared with Embodiment 4 under the same incident light path. .

Embodiment six

Please refer to FIG. 10A . FIG. 10A is a schematic structural diagram of a light source device according to Embodiment 6 of the present utility model. The light source device includes a first light source 201 , a pair of fly-eye lenses 202 , a light guiding system and a wavelength conversion device 206 , wherein the light guiding system includes a first light splitting component 204 , a collecting lens 205 , a relay lens 207 and an optical path correction component 209 .

In the above embodiments, the first excitation light L1 passes through the fly-eye lens pair 202 , passes through the first light splitting component 204 , and then enters the wavelength conversion device 206 . The difference is that in this embodiment, the first excitation light L1 is reflected by the first light splitting component 204 , and then enters the wavelength converting device 206 through the collecting lens 205 .

As shown in FIG. 10B , in this embodiment, the first light splitting component 204 includes a first area 2041 and a second area 2042 . Wherein, the first region 2041 reflects the first excitation light L1 and transmits the received light, and the second region 2042 transmits the second excitation light. Specifically, the first excitation light emitted by the first light source 201 enters the first area 2041 of the first light splitting component 204, is reflected in this area, and then enters the collecting lens 205, and after being converged by the collecting lens 205, enters the wavelength conversion device 206 . When the reflective section of the wavelength conversion device 206 is located on the optical path of the first excitation light, the first excitation light enters the reflective section with oblique incidence on the main optical axis, and forms the second excitation light L2 after reflection. The light L2 and the first excitation light L1 form a "V"-shaped optical path, and are collected by the collecting lens 205 and transmitted to the second area 2042 of the first spectroscopic component 204. After the second excitation light L2 is transmitted through the second area 2042, it enters the The optical path correction element 209, the reflective surface of the optical path correction element 209 reflects the second excitation light, and reflects it to the first area 2041 of the first beam splitting component 204, and the light is reflected by the first area 2041 and enters the exit light channel. When the wavelength conversion section of the wavelength conversion device 206 is located on the optical path of the first excitation light, the wavelength conversion section absorbs the first excitation light and emits the received light. The received light is approximately in a Lambertian distribution, and after being collected by the collecting lens 205, The received light is transmitted through the first light splitting component 204 and enters the outgoing light channel. The second excitation light L2 and the subject light L3 overlap at the position where the second excitation light is reflected by the first region 2041 of the first light splitting component 204 .

In this embodiment, the first light-splitting component 204 has opposite transmission and reflection characteristics for the first excitation light and the receiving light, and plays a role in distinguishing the optical paths of the first excitation light and the receiving light.

In this embodiment, the part of the first light splitting component 204 that reflects the excitation light (that is, the first region 2041) can be a wavelength filter, and the part that transmits the excitation light (the second region 2042) can be either a transparent substrate or a through hole.

In a modified embodiment of this embodiment, the first light splitting component may also have different area division methods according to the position change of the optical path correction component. For example, in FIG. 10C , the optical path correction component 209 is located between the first beam splitting component 204 and the wavelength conversion device 206, and the second excitation light reflected by the optical path correction component 209 coincides with the main optical axis of the subject light, and the first beam splitting component The second region of 204 for transmitting the second excitation light is located at the center of the first beam splitting component 204, or in other words on the optical path of the main optical axis of the stimulated light. Such modified embodiments, which can be modified and deployed by those skilled in the art according to requirements, should all belong to the technical solutions to be protected by the present utility model.

Embodiment seven

Please refer to FIG. 11 , which is a schematic structural diagram of a light source device according to Embodiment 7 of the present utility model. The light source device includes a first light source 201 , a pair of fly-eye lenses 202 , a light guiding system and a wavelength conversion device 206 , wherein the light guiding system includes a first light splitting component 204 , a collecting lens 205 , a relay lens 207 and an optical path correction component 209 . In addition, the light source device further includes a second light source 203 and a compensating light guide assembly 213 .

Compared with the above embodiments, this embodiment adds a second light source 203 for emitting compensation light when the wavelength conversion section of the wavelength conversion device 206 is on the optical path of the first excitation light L1.

In one embodiment, the compensating light and the subject light have overlapping wavelength ranges. For example, the wavelength range interval of the compensation light is (a, b), and the wavelength range interval of the subject light is (c, d), where c<a<d. In one embodiment, the color of the compensating light may be the same or similar to that of the receiving light. The compensation light can be used to compensate at least one of the hue and brightness of the received light. For example, in a specific embodiment, the second light source 203 is a red laser light source, the wavelength conversion device 206 includes a reflective section, a green wavelength conversion section and a red wavelength conversion section, when the red wavelength conversion section is in the first excitation When the light is on the light path, turn on the second light source 203, so that the red laser light and the red received light are emitted together, which can make the red light emitted by the light source device closer to the required red color, and can improve the brightness of the red light and expand the color of the light source device. area.

This embodiment is equivalent to adding a second light source that emits compensation light after the light source device in each of the above embodiments forms the outgoing light, so that the compensation light is combined with the outgoing light to achieve the effect of improving brightness and color.

In this embodiment, the compensation light guide assembly 213 is arranged on the exit light path of the subject light, specifically, on the exit light path of the integrator rod 212, and the subject light and compensation light are respectively incident on the compensation light guide assembly 213 from two directions. , thus combining into a bundle. The compensating light guide assembly 213 can be realized by setting a small transmission area on a reflective substrate as shown in the figure, wherein the compensation light is incident on the small transmission area and transmitted, and the received light covers most of the area of the compensation light guide assembly 213, except for a small amount of light Except for the loss due to transmission from the small transmission area, most of the remaining light is reflected by the compensating light guide assembly 213 . Further, coating can also be used to make the small transmission area only transmit light in the wavelength range of the compensation light, and reflect light in other wavelength ranges, so as to reduce light loss. In one embodiment, the transmission and reflection characteristics of the compensating light guiding component 213 for the receiving light and the compensating light can also be exchanged, and this technical solution can be realized by setting a compensating light reflection area on the transparent substrate.

In this embodiment, the compensation light emitted by the second light source 203 is combined with the received light at the position after the received light is formed, which avoids the light loss caused by the compensation light being incident on the wavelength conversion device and being scattered by the wavelength conversion device. The light utilization rate of the compensation light is greatly improved.

The distinguishing features of this embodiment compared with the first embodiment can also be combined with the above-mentioned other implementation manners to achieve the same technical effect, which will not be repeated here.

It can be understood that, on the basis of the above-mentioned embodiments, the position of combining the compensation light and the receiving light can also be advanced, so that the compensation light is incident on the wavelength conversion section of the wavelength conversion device, and is scattered and reflected by the wavelength conversion section to form a Lambertian The distributed compensation light is directly combined with the receiving light into one beam, which will not be repeated here.

The utility model also discloses a projection system. The projection system includes the light source device in each of the above embodiments, and also includes a light modulation device and a lens device. and modulate the spatial distribution of the light according to the input image signal, and the modulated light is emitted through the lens device to form an image, thereby realizing the projection display function.

The projection display system of the present utility model can be applied to projectors such as theater projectors, engineering projectors, micro projectors, educational projectors, wall projectors, laser TVs, etc., and can also be applied to image lighting such as image projection lamps, Transportation (vehicle, ship, aircraft) lights, searchlights, stage lights and other scenes.

The embodiments described in this specification are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without creative work are composed of some or all of the technical features of any two or more embodiments of the present application Feasible technical solutions all belong to the protection scope of the utility model.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above is only the embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the utility model specification and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (10)

1. A light source device, characterized in that it comprises a first light source, a fly-eye lens pair, a light guiding system and a wavelength conversion device; The first light source is used to emit a first excitation light, and the first excitation light is incident on the light guiding system after being homogenized by the fly-eye lens; the light guiding system is used to guide the first excitation light to the wavelength conversion device; The wavelength conversion device includes a wavelength conversion section and a reflection section, and the wavelength conversion device moves periodically so that the wavelength conversion section and the reflection section are periodically located on the optical path of the first excitation light, so that The wavelength conversion section absorbs the first excitation light and emits the received light, and the first excitation light is obliquely incident on the surface of the reflection section, and is reflected to form a second excitation light; The light guiding system is also used to collect the subject light and the second excitation light, and guide the subject light and the second excitation light to exit along the exit light channel; The light guiding system includes an optical path correction component, the optical path correction component is located on the optical path of the second excitation light, and is used to reflect the second excitation light, and make the main optical axis of the reflected second excitation light coincide with the The principal optical axes of the received light coincide; The fly-eye lens pair includes a first lens array and a second lens array arranged in sequence along the first excitation light direction, and each lens unit forming the first lens array overlaps and forms an image on the surface of the wavelength conversion device. 2. The light source device according to claim 1, characterized in that it comprises a beam angle reflector, located on the optical path between the first light source and the pair of fly-eye lenses, and the beam reflected by the beam angle reflector The angle between the first exciting light and the axis of the fly-eye lens is greater than 0° and not greater than 2°. 3. The light source device according to claim 1, wherein the light guiding system further comprises a collecting lens for converging the first excitation light into the wavelength conversion device and collecting the excitation light from the wavelength conversion device. the subject light and the second excitation light of the wavelength conversion device; The distance between the edge of the beam of the first excitation light incident on the collecting lens and the central axis of the collecting lens is 0.2-0.5 mm. 4. The light source device according to claim 1, further comprising a filter wheel, the filter wheel comprising a scattering transmission section, when the reflection section of the wavelength conversion device emits the second excitation light, The scattering transmission section is located on the optical path of the second excitation light, and is used for scattering the second excitation light. 5. The light source device according to claim 1, wherein the optical path correction component includes an angular distribution correction element for converging or diverging the second excitation light, so that the second excitation light is consistent with the The imaging positions of the above-mentioned subject light along the propagation direction of the beam coincide. 6. The light source device according to claim 5, wherein the optical path correction component comprises a concave reflective surface or a combination of a planar reflective surface and a convex lens, from the wavelength converting device to the second excitation light and the The overlap position of the subject light, the optical path of the second excitation light is shorter than the optical path of the subject light; or The optical path correction component includes a convex reflective surface or a combination of a planar reflective surface and a concave lens. From the wavelength conversion device to the overlapping position of the second excitation light and the subject light, the optical path of the second excitation light greater than the optical path of the subject light. 7. The light source device according to claim 1, wherein the optical path correction component is fixed on the reflective section of the wavelength conversion device for reflecting the first excitation light into the second excitation light Light. 8 . The light source device according to claim 7 , wherein the optical path correction component is in the shape of a concave curve or a straight line on an axial section of the wavelength conversion device. 9. The light source device according to claim 1, further comprising a second light source for emitting compensation light and a compensation light guide assembly, the compensation light guide assembly is arranged on the outgoing light path of the received light, The compensation light and the received light have overlapping wavelength ranges, and the compensation light and the received light are combined through the compensation light guiding component. 10. A projection system, comprising the light source device according to any one of claims 1 to 9, further comprising a light modulation device and a lens device.