CN217382636U - Light-emitting device and lighting device - Google Patents

Abstract

The application discloses a light-emitting device and a lighting device. The light emitting device includes a light source, a conditioning lens, and a projection element. The light source is used for emitting light source light, wherein, the light source includes: the light-emitting element is used for emitting first light, and the first light at least comprises first sub-light; the wavelength conversion element is excited by the first sub light to generate stimulated light with the wavelength different from that of the first sub light, and the stimulated light forms at least part of light source light; the adjusting lens receives the light source light and emits adjusting light with a beam angle different from that of the light source light, and the straight line of each ray of the adjusting light intersects with the optical axis of the projecting element at a convergence point; the projection element receives the modulated light and is used for collimating and emitting the modulated light; the convergent point moves on the optical axis of the projection element to change the light-emitting angle of the adjusting light emitted by the projection element. Therefore, the light emitting angle of the adjusting light emitted by the projection element can be changed under the condition that the projection element is not moved, the design is simple, and the light emitting device is easy to seal.

Description

Light-emitting device and lighting device

Technical Field

The present application relates to the field of lighting technologies, and in particular, to a light emitting device and a lighting device.

Background

Most of the existing searchlight light sources are made of xenon lamps, and the light path of the existing searchlight sources generally uses a reflection cup to collect light rays of the light sources and collimate and emit light beams. When the position of the reflecting cup is moved, the focal position of the reflecting cup is moved, the divergence angle of the projected light beam is increased, and when the divergence angle is small, the distance that the lamp can illuminate is long, but when the divergence angle is short, the illuminating range is small; when the divergence angle is large, the illumination range of the lamp in a short distance is enlarged, so that the divergence angle of the light beam can be adjusted by the lamp according to the illumination requirement.

Of course, there are also proposals in the prior art to use LEDs or laser light sources instead of xenon lamps. When the light source is used, a transmission type lens or a fresnel lens is usually used to replace a reflective cup, a light beam convergence point of the light source is positioned at a focus of the lens, so that the light beam is projected in a collimated manner, the focus position of the lens is away from the convergence point of the light source by moving the lens (a part of the lens in a movable lens group), or the magnification of the lens is changed, so that the divergence angle of the light beam projected by the lens is changed, but the lens aperture of the lens is generally larger, which causes difficulty in designing a movement mechanism and larger kinetic energy.

SUMMERY OF THE UTILITY MODEL

It is a primary object of the present application to provide a light emitting device, which is aimed at solving the above technical problems in the prior art.

In order to solve the above problems, the present application provides a light emitting device including: a light source, a conditioning lens, and a projection element. The light source is used for emitting light source light, wherein the light source comprises: a light emitting element for emitting first light including at least first sub-light, and a wavelength conversion element; the wavelength conversion element is excited by the first sub light to generate stimulated light with a wavelength different from that of the first sub light, and the stimulated light forms at least part of the light source light; the adjusting lens receives the light source light and emits adjusting light with a beam angle different from that of the light source light, and a straight line where each ray of the adjusting light is located intersects with an optical axis of the projecting element at a convergence point; the projection element receives the modulated light, and is used for collimating and emitting the modulated light; wherein the convergence point moves on an optical axis of the projection element to change an exit angle of the conditioning light exiting through the projection element.

In order to solve the above problems, the present application provides a lighting device including the above light-emitting device.

Compared with the prior art, the light-emitting device comprises the light source, the adjusting lens and the projection element. The light source is used for emitting light source light, wherein, the light source includes: the light-emitting device comprises a light-emitting element and a wavelength conversion element, wherein the light-emitting element is used for emitting first light, and the first light at least comprises first sub-light; the wavelength conversion element is excited by the first sub light to generate stimulated light with the wavelength different from that of the first sub light, and the stimulated light forms at least part of light source light; the adjusting lens receives the light source light and emits adjusting light with a beam angle different from that of the light source light, and the straight line of each ray of the adjusting light intersects with the optical axis of the projecting element at a convergence point; the projection element receives the modulated light and is used for collimating and emitting the modulated light; the convergent point moves on the optical axis of the projection element to change the light-emitting angle of the adjusting light emitted by the projection element. Through the mode, the position of the convergence point can be adjusted through the adjusting lens under the condition that the projection element is not moved, the light-emitting angle of the adjusting light emitted by the projection element is further changed, the design is simple, and the light-emitting device is easy to seal due to the fact that the projection element is not moved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first embodiment of a light-emitting device provided in the present application;

fig. 2 is a schematic structural diagram of a light-emitting device according to a second embodiment;

FIG. 3 is a schematic structural diagram of an embodiment of a light source according to the present application;

FIG. 4 is a schematic structural diagram of an embodiment of a light source according to the present application;

FIG. 5 is a schematic structural diagram of an embodiment of a light source according to the present application;

FIG. 6 is a schematic structural diagram of an embodiment of a light source according to the present application.

Reference numbers: a light-emitting device 10; a light source 100; a light emitting element 110; a wavelength converting element 120; a first collecting lens 130; a light splitting/combining element 140; a scattering reflective element 150; a second collecting lens 160; a reflective cup 170; a light guide 180; a conditioning lens 200; a projecting element 300; a first light 410; a first sub-light 420; a stimulated light 430; a light source light 440; the modulated light 450; the second sub light 460; convergence point F1; focal point F2; an optical axis O.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise. All directional indicators such as up, down, left, right, front, and rear … … in the embodiments of the present application are only used to explain the relative position relationship between the components, the movement, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The present application provides a light emitting device 10, referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a first embodiment of the light emitting device provided in the present application; fig. 2 is a schematic structural diagram of a light-emitting device according to a second embodiment of the present disclosure.

The light emitting device 10 includes a light source 100, a conditioning lens 200, and a projection element 300.

The light source 100 is used for emitting light source light 440, wherein the light source 100 comprises: a light emitting element 110 and a wavelength converting element 120, the light emitting element 110 being configured to emit first light 410, the first light 410 including at least first sub-light 420; the wavelength conversion element 120 is excited by the first sub-light 420 to generate excited light 430 with a wavelength different from that of the first sub-light 420, and the excited light 430 constitutes at least part of the light source light 440. The light emitting element 110 may include a light emitting diode or a laser diode, the first light 410 may be a laser or an LED light, the first light 410 may be a monochromatic light, such as blue light, green light, red light or other wavelength ranges, and the first light 410 may also be a mixed light in which at least two wavelength ranges of light are mixed, such as a mixed light of blue light and red light. The first sub-beam 420 may excite the wavelength conversion element 120 to be entirely converted into the stimulated emission light 430, or may partly excite the wavelength conversion element 120 to be partly converted into the stimulated emission light 430, and the remaining first sub-beams 420 that do not excite the wavelength conversion element 120 may be emitted from the wavelength conversion element 120 together with the stimulated emission light 430 and mixed. For the mixed light of the excited light and the unexcited first sub-light 420, at least part of the light source light 440 may be collected and constituted together, or the unexcited first sub-light 420 in the mixed light may be filtered out by means of filtering, for example, and only the excited light 430 is collected and at least part of the light source light 440 is constituted with the collected excited light 430.

The adjustment lens 200 receives the light source light 440 and emits adjustment light 450 having a beam angle different from that of the light source light 440, and a straight line on which each ray of the adjustment light 450 is positioned intersects the optical axis O of the projecting element 300 at a convergence point F1. Illustratively, each ray of the adjusting light 450 converges on the optical axis O of the projecting element 300, or a reversely extended line of each ray of the adjusting light 450 converges on the optical axis O of the projecting element 300.

The projecting element 300 receives the conditioned light 450 and is used to collimate and emit the conditioned light 450. The conditioned light 450 collimated out by the projecting element 300 has an exit angle that is outwardly diffused. The aperture of the projection element 300 is larger than the aperture of the adjustment lens 200, and when the projection element 300 includes one lens or a plurality of lenses in a cascade, the aperture of each lens is larger than the aperture of the adjustment lens 200.

Here, the convergence point F1 moves on the optical axis O of the projecting element 300 to change the light exit angle of the modulated light 450 exiting through the projecting element 300. The position of the convergence point F1 can be changed by changing the position of the adjustment lens 200, and can also be realized by adjusting the function of the lens 200 itself.

In this way, the position of the convergence point F1 can be adjusted by the adjusting lens 200 without moving the projecting element 300, so as to change the light-emitting angle of the adjusting light 450 emitted from the projecting element 300, the design is simple, and the light-emitting device 10 can be easily sealed because the projecting element 300 is not moved.

Wherein the adjustment lens 200 is configured to move on the optical axis O of the projection element 300, or the adjustment lens 200 is configured as a zoom lens. Illustratively, the zoom lens may comprise a liquid zoom lens system that does not require any mechanical actuators, is not susceptible to external forces, and achieves zooming primarily through the shape of the liquid. The adjusting lens 200 may also include a positive lens or a negative lens to change the position of the convergence point F1 by moving the position of the positive lens or the negative lens.

In one embodiment, the conditioning lens 200 is a positive lens, and the conditioning light 450 is a converging light beam between the conditioning lens 200 and the convergence point F1 and changes to a diverging light beam between the convergence point F1 and the projecting element 300.

Referring to fig. 1, in the present embodiment, the adjusting lens 200 is a condenser lens. The adjusting lens 200 receives the light source light 440 and converges the light source light 440 to a convergence point F1, i.e. the light beam between the adjusting lens 200 and the convergence point F1 is a converging light beam. The convergent light beam passes through a convergent point F1 and then is projected to the projection element 300, and the light beam between the convergent point F1 and the projection element 300 is a divergent light beam. When the adjustment lens 200 is moved on the optical axis O of the projection element 300, the position of the convergence point F1 can be changed to change the light exit angle of the adjustment light 450 exiting through the projection element 300. Exemplarily, as shown in fig. 1, the adjusting lens 200 shown by a solid line box can converge the light source light 440 to the convergence point F1, when the convergence point F1 coincides with the focal point F2 of the projecting element 300, and the exit angle of the adjusting light 450 emitted by the projecting element 300 is the smallest. Illustratively, as shown in fig. 1, the adjusting lens 200 moves toward the projecting element 300 to move to the position where the adjusting lens 200 is located, which is shown by the dashed line box, so that the convergence point F1 deviates from the focal point F2 of the projecting element 300, and the exit angle of the adjusting light 450 emitted by the projecting element 300 is large. The larger the distance between the convergence point F1 and the focal point F2 of the projecting element 300 is, the larger the light-emitting angle of the modulated light 450 emitted by the projecting element 300 is.

In another embodiment, conditioning lens 200 is a negative lens, conditioning light 450 is a diverging beam, and convergence point F1 is located on the side of conditioning light 450 facing away from projection element 300.

Referring to fig. 2, in the present embodiment, the adjusting lens 200 is a negative lens, the adjusting lens 200 receives the light source light 440 and emits a divergent light beam, a convergence point where a straight line where the divergent light beam is located intersects with the optical axis O of the transmission lens is located on a side of the adjusting lens 200 opposite to the transmission element, that is, an intersection point where a backward extension line of the divergent light beam converges is a convergence point F1. When the adjusting lens 200 moves on the optical axis O of the projecting element 300, the position of the converging point can be changed to change the light exit angle of the adjusting light 450 exiting through the projecting element 300. For example, as shown in fig. 2, the adjusting lens 200 shown by the solid line box can divergently emit the received light source light 440, when the converging point F1 coincides with the focal point F2 of the projection element 300, and the exit angle of the adjusted light 450 emitted by the projection element 300 is the smallest. Illustratively, as shown in fig. 2, the adjusting lens 200 moves toward the projecting element 300 to move to the position where the adjusting lens 200 is located, which is shown by the dashed line box, so that the convergence point F1 deviates from the focal point F2 of the projecting element 300, and the exit angle of the adjusting light 450 emitted by the projecting element 300 is large. The larger the distance between the convergence point F1 and the focal point F2 of the projecting element 300 is, the larger the light-emitting angle of the modulated light 450 emitted by the projecting element 300 is. When the adjustment lens 200 is a negative lens as opposed to the adjustment lens 200 being a condenser lens, the size of the light-emitting device 10 can be reduced in the direction of the optical axis O of the projection element 300.

In one embodiment, the convergence point F1 moves within a range between the focal point F2 of the projection element 300 to the projection element 300 and between two points on the optical axis O. Wherein the focus F2 of the projecting element 300 is between the adjusting lens 200 and the projecting element 300, and the focus F2 of the projecting element 300 is on the optical axis O of the projecting element 300, and the converging point F1 moves between the focus F2 of the projecting element 300 and the projecting element 300, when the converging point F1 moves gradually along the optical axis O toward the projecting element 300 side at the focus F2 of the projecting element 300, the light beam exiting through the projecting element 300 undergoes a process of gradually increasing the divergence angle from the collimated light beam, and in the opposite adjusting process, the light beam exiting through the projecting element 300 undergoes a process of gradually decreasing the divergence angle to collimation from the initial divergent light beam, which can be widely applied to scenes such as illumination, projection, etc. In other embodiments, the convergence point F1 may also be moved in a direction away from the projection element 300, and for example, the convergence point F1 may be moved between the projection element 300 and two points located on the optical axis O within a range of 1.5 or 2 times the distance from the focal point F2 of the projection element 300 to the projection element 300.

The light source light 440 may be a collimated light beam, or may be an uncollimated light beam such as a divergent light beam or a convergent light beam. When the light source light 400 is a collimated light beam, the position of the adjusting lens 200 is moved without changing the size of the light spot of the light source light 440 received by the adjusting lens, which is beneficial to ensure the size of the light spot of the light beam finally projected by the projecting element 300. Wherein the collimated light beam can be a collimated light beam formed after being processed by a collimating lens.

It should be noted that the collimated light beam is not limited to be collimated in a strict sense, and the collimated light source light 440 may still have a small divergence angle or convergence angle, for example, the collimated light source light 440 may still have a divergence angle of 3 degrees, and the small error range does not have a significant influence on the finally projected light beam, so the collimated light beam may be understood as a substantially collimated light beam in the present application.

In an embodiment, the light source 100 further includes a first collecting lens 130, and the first collecting lens 130 is located on the optical path between the wavelength conversion element 120 and the adjusting lens 200 and is used for collecting and collimating the emitted laser light 430. The first collecting lens 130 may include a collimating lens, and the stimulated light 430 can be collimated out by the first collecting lens 130, or the stimulated light 430 and the unexcited first light 410 can be collimated out by the first collecting lens 130.

In this embodiment, the wavelength conversion element 120 may be a transmissive fluorescent wheel. The wavelength conversion element 120 has a fluorescent layer thereon, and the fluorescent layer can receive the first sub-light 420 and excite the fluorescent material through the first sub-light 420 to generate the excited light 430. Wherein the fluorescent layer comprises a fluorescent material, and the fluorescent material can be wavelength conversion material of blue light segment, green light segment, yellow light segment or red light segment. Specifically, the fluorescent material may include fluorescent glass, fluorescent silica gel, fluorescent single crystal, fluorescent ceramic, fluorescent complex phase ceramic, and the like. After the first light 410 is projected to the wavelength conversion element 120, the stimulated light 430 generated by the first sub-light 420 exciting the fluorescent material is transmitted from the wavelength conversion element 120 to the first collecting lens 130, or both the stimulated light 430 generated by the first sub-light 420 exciting the fluorescent material and another part of the first light 410 that is not excited are transmitted from the wavelength conversion element 120 to the first collecting lens 130.

In other embodiments, the wavelength conversion element 120 may also be a reflective wavelength conversion element 120, and the wavelength conversion element 120 may include a phosphor layer and a reflective layer. Wherein, the fluorescent layer can receive the first sub-light 420 and excite the fluorescent material by the first sub-light 420 to generate the excited light 430. The reflective layer is used to reflect the stimulated light 430. The reflective layer can be a metal reflective layer or an inorganic reflective layer. The inorganic reflective layer is formed of reflective or scattering particles, which may be silicon nitride, aluminum oxide, aluminum nitride, magnesium oxide, barium sulfate, titanium dioxide, zirconium oxide, zinc oxide, boron nitride, aluminum nitride, silicon carbide, aluminum borate, or the like, and a matrix. The matrix can be silica gel or glass and other materials.

Referring to fig. 3 in conjunction with fig. 1 and 2, fig. 3 is a schematic structural diagram of an embodiment of a light source of the present application.

The light source 100 includes a light splitting and combining element 140, and the light splitting and combining element 140 guides at least the first sub light 420 to the wavelength conversion element 120 and guides the received laser light 430 to the adjustment lens 200. The light splitting and combining element 140 is located on the optical path of the first light 410, the light splitting and combining element 140 reflects the first sub light 420 to the first collecting lens 130, the first sub light 420 is converged on the wavelength conversion element 120 through the first collecting lens 130, the wavelength conversion element 120 is excited by the first sub light 420 to form the received laser light 430, the received laser light 430 is reflected to the first collecting lens 130 through the reflecting layer on the wavelength conversion element 120, is collimated and emitted to the light splitting and combining element 140 through the first collecting lens 130, and is guided to the adjusting lens 200 through the light splitting and combining element 140. The light splitting and combining element 140 may reflect the first light 410 to the wavelength conversion element 120, where the first light 410 includes a first sub-light 420 and another part of the first light 410, the first sub-light 420 is used to excite the wavelength conversion element 120 to form the received laser light 430, the another part of the first light 410 and the received laser light 430 are both reflected by the wavelength conversion element 120 to the light splitting and combining element 140, and the received laser light 430 and the another part of the first light 410 are combined and emitted by the light splitting and combining element 140.

In an embodiment, the light splitting and combining element 140 includes a reflective film and an antireflection film thereon, and the reflective film is used for reflecting at least the first sub-light 420 to the wavelength conversion element 120. The antireflection film serves to transmit at least the received laser light 430 to the conditioning lens 200. The antireflection film can increase the light transmittance, and the reflection film and the antireflection film can be plated on the surface of the light splitting and combining element 140. The reflection film may be located in the region where the reflection reducing film is located, for example, the reflection reducing film is plated on the light splitting and combining element 140, and then the reflection reducing film is plated on the reflection reducing film; or the antireflection film is in a hollow shape similar to a circular ring, and the reflection film is plated in a blank area in the middle of the antireflection film.

Referring to fig. 4 in conjunction with fig. 1 and 2, fig. 4 is a schematic structural diagram of an embodiment of a light source of the present application.

The light source 100 further comprises a scattering reflective element 150, the first light 410 further comprises a second sub light 460, and the scattering reflective element 150 is configured to scatter reflect the second sub light 460 to form a compensation light, and the compensation light constitutes a part of the light source light 440. The first sub-light 420 and the second sub-light 460 have different wavelength ranges or different polarization states. The scattering reflective element 150 may reflect the second sub light 460, and for example, the scattering reflective element 150 may employ a glass substrate, a ceramic substrate, or the like. Meanwhile, in order to improve the scattering performance of the scattering reflective element 150, scattering particles or reflective particles may be coated on the scattering reflective element 150, and exemplarily, the scattering particles or reflective particles may be silicon nitride, aluminum oxide, aluminum nitride, magnesium oxide, barium sulfate, titanium dioxide, zirconium oxide, zinc oxide, boron nitride, aluminum nitride, silicon carbide, aluminum borate, or the like. The scattering reflective element 150 may also be made of silica gel or glass. The scattering and reflecting element 150 is used for reflecting and scattering the second sub-light 460 to form compensation light, and the compensation light and the stimulated light 430 together form a light source light 440, and the second sub-light 460 can be mixed with the stimulated light 430 to change the color of the light source light 440, for example, the light source light 440 can be white light, red light, green light, or yellow light, and the like, which can be determined according to the actual situation.

The light source 100 further includes a second collecting lens 160, the second collecting lens 160 for collecting and collimating the compensated light. The second collecting lens 160 may include a collimating lens, and the second collecting lens 160 is located on the optical path of the second sub light 460, converges the second sub light 460 to the scattering reflective element 150 through the second collecting lens 160, and receives and collimates the second sub light 460 reflected by the scattering reflective element 150.

In this embodiment, the light source 100 further includes a light splitting and combining element 140, the light splitting and combining element 140 receives the first light 410, transmits the first sub-light 420 along the first light 410 path and reflects the received laser light 430 returning through the wavelength conversion element 120, and reflects the second sub-light 460 along the second light path and transmits the compensation light returning through the scattering and reflecting element 150, wherein the received laser light 430 reflected by the light splitting and combining element 140 and the compensation light transmitted by the light splitting and combining element 140 constitute part or all of the light source light 440. That is, the light splitting and combining element 140 partially transmits and partially reflects the first light 410, the transmitted portion is used as the first sub-light 420 to excite the wavelength conversion element 120 to form the stimulated light 430, and the reflected portion is used as the second sub-light 460 and is processed by the scattering and reflecting element 150 to be used as the compensation light. The light splitting and combining element 140 reflects the received stimulated light 430 and transmits the received compensation light, so that the compensation light and the stimulated light 430 together serve as light source light 440.

The light splitting and combining element 140 has a first optical surface 141, and a wavelength splitting film is disposed on the first optical surface 141, and is configured to transmit the second sub-light 460 and reflect the received laser light 430. The first optical surface 141 faces the wavelength converting element 120, and the wavelength splitting film is capable of reflecting the fluorescence wavelength and transmitting the laser wavelength.

The light splitting and combining element 140 further has a second optical surface 142 opposite to the first optical surface 141, and the second optical surface 142 is used for transmitting at least part of the first sub-light 420 and reflecting at least part of the second sub-light 460. The second optical surface faces the light emitting element 110. Wherein the second optical surface is provided with a partially reflective film, and the partially reflective film is used for transmitting part of the first sub-light 420 and reflecting at least part of the second sub-light 460.

In one embodiment, the light splitting and combining element 140 includes a first glass film and a second glass film sequentially disposed, wherein the glass film is disposed with a wavelength splitting film. The first glass film and the second glass film can be both white glass, and at least part of the second sub-light 460 is reflected by two surfaces of the white glass without plating a partial reflection film on the second optical surface.

Referring to fig. 5 in conjunction with fig. 1 and 2, fig. 5 is a schematic structural diagram of an embodiment of a light source of the present application.

The light source 100 further includes a reflective cup 170, the reflective cup 170 converging the stimulated light 430 at a focal point of the reflective cup 170, wherein the first collecting lens 130 is located on an optical path of the stimulated light 430 after the focal point.

The reflective cup 170 may have a hollow hemispherical shape, and a through hole may be formed on a sidewall of the reflective cup 170, through which the first light 410 penetrates the reflective cup 170 to the wavelength conversion element 120. The wavelength conversion element 120 includes a reflective layer and a fluorescent layer. The fluorescent layer can receive the first sub-light 420, excite the fluorescent material through the first sub-light 420, and generate the received laser light 430, the reflective layer is used to reflect the received laser light 430 to the inner side of the reflective cup 170, the reflective cup 170 converges the received laser light 430 at the focal point F2 of the reflective cup 170, and after converging, the received laser light 430 is projected to the first collecting lens 130, and is collected and collimated by the first collecting lens 130 to exit the received laser light 430.

Referring to fig. 6 in conjunction with fig. 1 and 2, fig. 6 is a schematic structural diagram of an embodiment of a light source of the present application. The light source 100 further includes a light guide 180, the light guide 180 being configured to guide the laser light 430 condensed by the reflector cup 170 to the first collecting lens 130, wherein a light inlet of the light guide 180 is located at a focal point of the reflector cup 170. The area of the light inlet of the light guide 180 is smaller than the area of the light outlet of the light guide 180. The light guide 180 is located between the light reflecting cup 170 and the first collecting lens 130, so that the light guide 180 is used to guide the received laser light 430 to the first collecting lens 130, so that the divergence angle of the received laser light 430 is reduced twice through the light guide 180 and the first collecting lens 130, the utilization rate of the second received laser light 430 is increased, and the illumination effect of the light emitting device 10 is enhanced.

The present application further provides an illumination device, which includes a light-emitting device, which can be the light-emitting device 10 of the above embodiment, and the structure and the operation principle thereof are not described herein again.

Further, the lighting device of the present embodiment may further include a control circuit, an external bracket, and the like.

The lighting device can be a stage lamp, an LED lamp and the like.

The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (22)

1. A light emitting device comprising a light source for emitting light source light, a conditioning lens, and a projecting element, wherein the light source comprises:

a light emitting element for emitting first light including at least a first sub light;

a wavelength conversion element which is excited by the first sub light to generate excited light having a wavelength different from that of the first sub light, the excited light constituting at least part of the light source light;

the adjusting lens receives the light source light and emits adjusting light with a beam angle different from that of the light source light, and a straight line where each ray of the adjusting light is located intersects with an optical axis of the projecting element at a convergence point;

the projection element receives the conditioning light and is used for collimating and emitting the conditioning light;

wherein the convergence point moves on an optical axis of the projection element to change an exit angle of the conditioning light exiting through the projection element.

2. The lighting device according to claim 1, wherein the adjustment lens is configured to move on an optical axis of the projection element, or wherein the adjustment lens is configured as a zoom lens.

3. The lighting device according to claim 1, wherein the adjustment lens is a positive lens, wherein the adjustment light is a convergent light beam between the adjustment lens and the convergent point and changes to a divergent light beam between the convergent point and the projection element; or, the adjusting lens is a negative lens, wherein the adjusting light is a divergent light beam, and the convergent point is located on a side of the adjusting light opposite to the projection element.

4. The light-emitting device according to claim 1, wherein the convergence point moves within a range between a focal point of the projection element to the projection element and between two points on the optical axis.

5. The lighting device of claim 1, wherein the projecting element comprises one lens or a plurality of lenses in a cascade.

6. The lighting device according to claim 1, wherein the source light is a collimated light beam.

7. The lighting device according to claim 1, wherein the light source further comprises: and the first collecting lens is positioned on a light path between the wavelength conversion element and the adjusting lens and is used for collecting and collimating and emitting the received laser light.

8. The lighting device according to claim 7, wherein the light source further comprises: and a light splitting and combining element that guides at least the first sub light to the wavelength conversion element and guides the received laser light to the adjustment lens.

9. The light-emitting device according to claim 8, wherein the light splitting and combining element includes thereon:

a reflective film for reflecting at least the first sub light to the wavelength converting element; and

and the antireflection film is used for transmitting at least the laser light to the adjusting lens.

10. The lighting device according to claim 7, wherein the light source further comprises: the light-receiving laser is converged to a focus of the light-receiving cup by the light-receiving cup, and the first collecting lens is positioned on a light path of the light-receiving laser behind the focus.

11. The light-emitting device according to claim 10, wherein the light source further comprises a light guide for guiding the laser light converged by the reflector cup to the first collecting lens, wherein a light inlet of the light guide is located at a focal point of the reflector cup.

12. The light-emitting device according to claim 11, wherein an area of the light inlet of the light guide is smaller than an area of the light outlet of the light guide.

13. The device as claimed in claim 1, wherein the light source further comprises a scattering reflective element, the first light further comprises a second sub-light, and the scattering reflective element is configured to scatter reflect the second sub-light to form a compensation light, and the compensation light forms part of the light source light.

14. The light-emitting device according to claim 13, wherein the first sub light and the second sub light have different wavelength ranges or different polarization states.

15. The light-emitting device according to claim 13, wherein the light source further comprises a light splitting and combining element that receives the first light, transmits the first sub light along a first optical path and reflects the received light returned through the wavelength conversion element, and reflects the second sub light along a second optical path and transmits the compensation light returned through the scattering and reflecting element, wherein the received light reflected by the light splitting and combining element and the compensation light transmitted by the light splitting and combining element constitute part or all of the source light.

16. The lighting apparatus according to claim 15, wherein the light splitting and combining element has a first optical surface on which a wavelength splitting film is disposed, and the wavelength splitting film is configured to transmit the second sub-light and reflect the excited light.

17. The light-emitting device according to claim 16, wherein the light splitting and combining element further has a second optical surface opposite to the first optical surface, and the second optical surface is configured to transmit at least a part of the first sub-light and reflect at least a part of the second sub-light.

18. The light-emitting device according to claim 17, wherein a partially reflective film is provided on the second optical surface.

19. The lighting device according to claim 17, wherein the light splitting and combining element comprises a first glass film and a second glass film, which are sequentially disposed, wherein the wavelength splitting film is disposed on the glass films.

20. The light-emitting device according to claim 13, wherein the light source further comprises a second collecting lens for collecting and collimating the compensated light.

21. The light-emitting device according to claim 1, wherein the light-emitting element comprises a light-emitting diode or a laser diode.

22. A lighting device characterized by comprising the light-emitting device according to any one of claims 1 to 21.

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