CN213452984U

CN213452984U - Lighting device and lamp

Info

Publication number: CN213452984U
Application number: CN202022674946.XU
Authority: CN
Inventors: 杨毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-06-15
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses a lighting device and lamps and lanterns, including light path adjustment exit device, light path adjustment exit device includes light recovery portion, light exit portion and light recovery portion and light exit portion peripheral region, still includes light emitting device, the light that light emitting device sent includes first angle light and second angle light, at least partly first angle light is luminous to light recovery portion, and light recovery portion reflects this part first angle light back to light emitting device, and light emitting device has scattered reflection's effect, at least partly to first angle light second angle light is luminous to light exit portion, and light path adjustment exit device includes light recovery portion, light exit portion and light recovery portion and light exit portion peripheral region, has realized the outgoing and the recovery of light, selects the part of emergent light to can practice thrift the light energy, improve the utilization ratio of light.

Description

Lighting device and lamp

Technical Field

The utility model belongs to the technical field of the lighting technology and specifically relates to a lighting device and a lamps and lanterns.

Background

Most of the existing lighting devices emit light uniformly, and are usually used together with a reflective cup/lampshade to emit the light emitted by the lighting device towards a certain angle or direction. The existing reflecting cup/lampshade only receives the light beam and cannot select the emergent angle of the light beam, even if the emergent angle of the light beam can be selected, the light beam which does not meet the requirement of the emergent angle cannot be emergent, but can be wasted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the weak point of above-mentioned conventional art, the utility model provides a lighting device with light path adjustment outgoing device.

In order to solve the above problems, the utility model adopts the following technical scheme: the utility model provides a lighting device, includes light path adjustment exit device, light path adjustment exit device includes light recovery portion, light exit portion and light recovery portion and the peripheral region of light exit portion, still includes light emitting device, the light that light emitting device sent includes first angle light and second angle light, and at least some first angle light is luminous to light recovery portion, and light recovery portion reflects this part first angle light back to light emitting device, and light emitting device has the effect of scattering reflection to first angle light, and at least some second angle light is luminous to light exit portion, and light exit portion reflects this part second angle light, and the second angle light that is reflected by light exit portion forms the emergent light.

As an improvement of the technical scheme: the emergent light is emitted towards the light-emitting device and is emitted from one side of the light-emitting device or around the light-emitting device.

As an improvement of the technical scheme: the light emergent part comprises a light emergent surface, the light recycling part comprises a light recycling surface, and the light emergent surface and the light recycling surface are spliced to form a concave surface.

As an improvement of the technical scheme: the light-emitting device comprises a fluorescent light-emitting device and a laser light source for exciting the fluorescent light-emitting device, and laser emitted by the laser light source excites the fluorescent light-emitting device and then is excited.

As an improvement of the technical scheme: the light path adjusting and emitting device comprises a light transmitting area, laser emitted by the laser source passes through the light transmitting area and then excites the fluorescent light emitting device, the geometric center of the light transmitting area is positioned under irradiation of a reverse light path along emergent light, and the fluorescent light emitting device is arranged on a projection formed on the light path adjusting and emitting device.

As an improvement of the technical scheme: the light-transmitting area is a lens made of transparent materials, and the surface of the light-transmitting area is plated with an optical coating layer which transmits laser and reflects light of a first angle and a second angle.

As an improvement of the technical scheme: the light-transmitting region is a part of the light recovery portion.

As an improvement of the technical scheme: the geometric center of the light recovery part is positioned on the projection formed by the light-emitting device on the light path adjusting and emitting device under the irradiation of the emergent light or the reverse light path of the emergent light.

As an improvement of the technical scheme: the light recycling surface is a spherical surface, and the light emergent surface is a spherical surface, an ellipsoid surface or a paraboloid.

Due to the adoption of the technical scheme, compared with the prior art, the light path adjusting and emitting device comprises the light recovery part, the light emitting part, the light recovery part and the peripheral area of the light emitting part, the light emitting and the light recovery are realized, the part of the emergent light is selected, the light energy can be saved, and the utilization rate of the light is improved;

the light transmitting region is overlapped with the light recovery portion, and on the projection formed by the fluorescent light emitting device on the light path adjusting emission device, the portion which cannot be used for emitting light is used as the light recovery portion and the light transmitting region, so that each portion of the light path adjusting emission device is reasonably divided.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Drawings

Fig. 1 is a cross-sectional view of a lighting device.

Fig. 2 is a cross-sectional view of a lighting device.

Fig. 3 is a partial structural schematic view of fig. 2.

Fig. 4 is a partial structural schematic view of fig. 2. .

Fig. 5 is a cross-sectional view of a lighting device.

Fig. 6 is a partial structural schematic view of fig. 5.

Fig. 7 is a cross-sectional view of a lighting device.

Detailed Description

Example 1:

in some special illumination fields, only part of light with angular distribution or surface subdivision belongs to the light which is expected to be utilized, and the light which cannot be utilized is usually wasted, and at the moment, the utilization rate of the light-emitting device is low, which is not in accordance with the current concept of energy conservation, green and environmental protection. The light which can not be utilized not only reduces the utilization rate of the light-emitting device, but also forms stray light to be emitted after being reflected or refracted, and the illumination effect of the whole illumination device is influenced. As shown in fig. 1, an illumination device includes a light path adjusting emission device, the light path adjusting emission device includes a light recycling portion 101, a light emission portion 102, and a region around the light recycling portion 101 and the light emission portion 102, and further includes a light emitting device, the light emitted by the light emitting device includes a first angle light 121 and a second angle light 122, at least a portion of the first angle light 121 emits light to the light recycling portion 101, the light recycling portion 101 reflects the portion of the first angle light 121 back to the light emitting device, the light emitting device has a scattering and reflecting effect on the first angle light 121, at least a portion of the second angle light 122 emits light to the light emission portion 102, the light emission portion 102 reflects the portion of the second angle light 122, and the second angle light 122 reflected by the light emission portion 102 forms an emission light 123.

The light path adjusting and emitting device is used in cooperation with the light emitting device, and divides the light emitted by the light emitting device into a first angle light 121 and a second angle light 122 according to whether the light meets the use requirement of the lighting device. The light emitting part 102 includes a light emitting surface 102a, wherein the light emitting surface 102a faces a side where the light emitting device emits light, the light emitting surface 102a is a part of a spherical surface, and the second angle light 122 reflected by the light emitting surface 102a is emitted to the outside of the lighting device since the light emitting surface 102a faces the light emitting device. The second angle light 122 reflected by the light exit surface 102a is the exit light 123. The light recovery unit 101 includes a light recovery surface 101a, the light recovery surface 101a faces a side of the light emitting device that emits light, the light recovery surface 101a is a part of a spherical surface, and the light recovery unit 101 recovers the first angle light 121 emitted from the light emitting device, so that the first angle light 121 is irradiated onto the light recovery surface 101a, reflected by the light recovery surface 101a, and returned to the light emitting device again. Therefore, the light emitting device is theoretically positioned at the center of the sphere of the light collection surface 101 a. Since the light emitting device is not an ideal point light source in practical use, it is not an optimal solution to locate the light emitting device at the center of the light collection surface 101 a. In order to collect the first angle light 121 reflected by the light collection surface 101a as much as possible on the light emission surface of the light emitting device, a preferred embodiment is to move the light emitting device from the center of the sphere of the light collection surface 101a to a direction closer to the light collection surface 101 a. At this time, the first angle light 121 recycled by the light emitting device is increased, so that stray light in the emergent light 123 is reduced, and the illumination effect is obviously improved. Since the light emitting device has a scattering and reflecting effect on the first angle light 121, the first angle light 121 reflected by the light recovery surface 101a back to the light emitting device does not return to the light recovery surface 101a all the way, and a part of the first angle light 121 reaches the light exit surface 102a after scattering and reflecting on the surface of the light emitting device, so that the conversion from the first angle light 121 to the second angle light 122 is realized, and the utilization rate of the light emitted by the light emitting device is obviously improved.

As is clear from the above analysis, the light emitted from the light-emitting device is emitted from the region around the light-collecting unit 101 and the light-emitting unit 102, and this part of the light cannot be collected nor formed into the emitted light 123, and therefore this part of the light is wasted, and it is necessary to sufficiently utilize this part of the light in order to improve the efficiency of the illumination device. In a preferred embodiment, the light exit surface 102a and the light recovery surface 101a are spliced to form a concave surface. The light exit surface 102a and the light recovery surface 101a are spliced to form a concave surface, so that the first-angle light 121 and the second-angle light 122 emitted by the light emitting device are prevented from being emitted from the space between the light recovery surface 101a and the light exit surface 102a or from the peripheral area, and the efficiency of the lighting device is improved by the technical scheme.

If the light recovery surface 101a and the light emitting surface 102a are not spliced, the light emitted by the light emitting device is partially emitted from the space between the light recovery surface 101a and the light emitting surface 102a or the peripheral area, and even if the light emitted by the light emitting device is recovered by the light recovery surface 101a, the efficiency of the lighting device is low, and the lighting device also belongs to the protection scope of the utility model.

As can be seen from the above description of the light recovery surface 101a and the light exit surface 102a, the first angle light 121 reflected by the light recovery part 101a returns to the light emitting device, the second angle light 122 reflected by the light exit part 102a forms the exit light 123 to be emitted, and the positional relationship between the light recovery surface 101a and the light exit surface 102a determines which part of the light emitted by the light emitting device is recovered and which part is emitted. In a preferred embodiment, the light collection surface 101a is arranged around the light exit surface 102 a. At this time, the large-angle light emitted by the light emitting device is reflected by the light recovery surface 101a and returns to the light emitting device, so that the light recovery effect is achieved; the small-angle light emitted from the light emitting device is emitted from the light emitting surface 102a to form an emitting light 123.

Since the light emitting device emits light towards the light recycling surface 101a and the light exit surface 102a, the shielding of the light emitting device from the outgoing light 123 causes a reduction in the efficiency of the lighting device, and in a preferred embodiment, the outgoing light 123 exits from a side of the light emitting device. The center of the light exit surface 102a is located beside the light emitting device. The outgoing light 123 reflected by the light exit surface 102a converges at the convergence point 133, and the center of the sphere of the light exit surface 102a is located between the convergence point 133 and the light emitting device. According to the geometrical optics principle, light emitted by one side of a sphere center of a light-emitting point is reflected by the corresponding sphere of the sphere center and then converged into a point at the position where the light-emitting point is in mirror symmetry with the sphere center. The outgoing light 123 forms a converging point 133 beside the light emitting device, and at this time, the outgoing light 123 is not blocked by the light emitting device, and the light emitting efficiency of the lighting device is not affected.

In summary, the first angle light 121 emitted by the light emitting device is reflected back to the light emitting device through the light recycling surface 101a, the light emitting device converts the first angle light 121 reflected by the light recycling surface 101a into the second angle light 122 through scattering reflection, and then emits the second angle light 122 emitted by the light emitting device is reflected by the light emitting surface 102a to form the emitting light 123, and the second angle light 122 is the portion of light that meets the requirement of the lighting device. In order to realize the conversion from the first-angle light 121 to the second-angle light 122, the light recycling portion 101 is added, the light recycling surface 101 returns the first-angle light 121 to the light emitting device again, the light emitting device scatters the returned first-angle light 121 and then emits the first-angle light again, and a part of the first-angle light 121 emitted by the light emitting device again is converted into the second-angle light 122, so that the first-angle light 121 which does not meet the requirement is recycled to the light emitting device for reuse, and the waste of light is avoided.

The light emitting device needs to emit the first angle light 121, the second angle light 122 and also needs to scatter and reflect the first angle light 121, and in a preferred embodiment, the light emitting device is an LED light emitting chip 104. The LED light emitting chip 104 emits light to one side, the light emitted by the LED light emitting chip 104 includes the first angle light 121 and the second angle light 122 in the above technical solution, and then the LED light emitting chip 104 reflects the light emitted by itself, which satisfies the requirement of scattering and reflecting the first angle light 121.

Since the light emitting device emits light toward the light recovery part 101 and the light exit part 102, the light emitting device requires a means for fixing and dissipating heat, and a preferred embodiment includes a cover plate 103, the cover plate 103 being a high thermal conductive plate that is covered on the light recovery part, wherein the light emitting device is fixed on the cover plate 103. The cover plate 103 serves to fix the light emitting device and to conduct heat emitted from the light emitting device to the outside of the entire lighting device. The structure further improves the installation precision of the light-emitting device, improves the heat conduction efficiency of the light-emitting device, and obviously improves the service life and the use effect.

Example 2:

in embodiment 1, a light recycling surface is arranged around a light emitting surface, first-angle light emitted by a light emitting device is large-angle light, and the large-angle light is reflected by the light recycling surface and returns to the light emitting device; the second angle light emitted by the light emitting device is small angle light, and the small angle light is emitted after being reflected by the light emitting surface to form emergent light. The present embodiment is different from embodiment 1 in that the present embodiment reflects the large-angle light emitted by the light emitting device by the light emitting surface 202a to form the emitting light 223 for emitting; the light emitted from the light emitting device with a small angle is reflected by the light recovery surface 201a and returns to the light emitting device.

In example 1, the outgoing light is focused and emitted, and in the illumination field, it is sometimes necessary to emit parallel light, as shown in fig. 2-4, a preferred embodiment is that when the light emitting surface 202a is a paraboloid, and the light emitting surface 202a is a paraboloid, the second angle light 222 reflected by the light emitting surface 202a forms parallel outgoing light 223, so as to meet different requirements in the illumination field.

Since the light exit surface 202a is used to emit light of the light emitting device at a large angle, the light exit surface 202a is disposed around the light emitting device. The high-angle light emitted from the light emitting device can be reflected by the light emitting surface 202a to form parallel emitting light 223 and then emitted.

The light exit surface 202a is a paraboloid, and the exit light 123 formed by reflection by the light exit surface 202a is emitted from the light exit opening surrounded by the light exit surface 202 a. Because the light-emitting device emits light at a full angle, the small-angle light emitted by the light-emitting device cannot be reflected by the light-emitting surface 202a, stray light is formed after the part of the small-angle light is emitted, the brightness of the light-emitting device cannot be improved, and the illumination effect is also influenced. Therefore, the light emitted from the light emitting device at a small angle cannot be emitted from the light exit of the light exit surface 202 a. To improve the utilization rate of light emitted from a lighting device and reduce the emission of stray light. In a preferred embodiment, the light-collecting device further includes a light-collecting surface 201a, and the light-collecting surface 201a is a spherical surface. The light-recycling surface 202a is positioned at a small angular range of the light emitted from the light-emitting device. Since the light recovery surface 202a is a part of a spherical surface, the light emitting device should be theoretically placed at the center of the sphere of the light recovery surface 202a, and since the light emitting device is not an ideal point light source, the light emitting device is not located at the optimal position of the sphere center, and it is known from many experiments by the applicant that the effect of recovering the first angle light 221 by the light recovery surface 202a when the distance from the center of the light emitting device to the light recovery surface 202a is slightly smaller than the spherical radius corresponding to the light recovery surface 202a is better.

It can be seen from the description of the light recovery surface 201a and the light exit surface 202a that the light recovery surface 201a and the light exit surface 202a are not a spliced concave surface. The light recovery surface 201a returns light emitted from the light emitting device at a small angle that cannot be reflected by the light exit surface 202a to the light emitting device, thereby improving the utilization rate of the light emitted from the light emitting device.

Although the LED light emitting chips in embodiment 1 have a simple structure, the luminance is insufficient, and the number of LED light emitting chips can only be increased in high power lighting, and the increase in the number of LED light emitting chips causes the light emitting surface of the LED light emitting chips to be farther away from the spherical center of the light recycling surface 201a, so that the light recycling effect of the light recycling surface 201a on the light emitted from the light emitting device is reduced, the utilization rate of the LED light emitting chips is reduced, and stray light is increased. Therefore, the LED light-emitting chip has poor effect when applied to high-power illumination. In order to solve the above problem, as shown in fig. 2, in a preferred embodiment, the light emitting device includes a fluorescent light emitting device, the illumination device further includes a laser light source 206 for exciting the fluorescent light emitting device, and the laser light 224 emitted from the laser light source 206 excites the fluorescent light emitting device and then is excited. The LED light-emitting chip is replaced by the fluorescent light-emitting device and the laser light source 206 for exciting the fluorescent light-emitting device to emit light, so that the brightness of the light-emitting device is improved, and the requirement of high-power illumination is met.

Compared with embodiment 1, the problem of poor effect of the LED light emitting chip in high-power illumination is solved by introducing the laser light source 206, and the problem of how to guide the laser light 224 emitted by the laser light source 206 to the fluorescent light emitting device is increased after introducing the laser light source 206. In order to solve this problem, in a preferred embodiment, the light path adjusting and emitting device includes a light-transmitting region 208, and the laser light 224 emitted from the laser light source 206 passes through the light-transmitting region 208 to excite the fluorescence light-emitting device. The light-transmitting region 208 solves the problem of how to direct the laser light 224 emitted by the laser light source 206 onto the fluorescent light emitting device.

Since a large amount of laser light is consumed by the transparent heat conductive substrate in a form of being reflected or converted into heat by the laser light passing through the base of the transmissive fluorescent sheet, a preferred embodiment is that the fluorescent light emitting device is a reflective fluorescent sheet 207. In order to apply the reflective fluorescent sheet 207, a preferred embodiment further includes a reflecting mirror 209, and the reflecting mirror 209 is fixed to a part of the light recovery surface 201 a. Since the mirror 209 reflects the laser light 224 condensed by the lens 210, the area of the mirror 209 is small, the influence on the light collection surface 201a is negligible, and the area of the reflective fluorescent sheet 207 can be reduced.

Since the light recycling surface 201a is used for recycling the first angle light 221, the first angle light 221 in the present embodiment is a small angle light emitted from the reflective fluorescent sheet 207. Next, the reflective fluorescent sheet 207 emits light uniformly, and the relative position of the reflective fluorescent sheet 207 and the light recovery surface 201a affects the brightness of the light spot formed by the outgoing light 223, so that the light spot formed by the outgoing light 223 has an irregular shape. Then, a part of the first angle light 221 cannot be collected by the light collection surface 201a, and the first angle light 221 cannot be collected by the light collection surface 201a, which causes stray light to be emitted, thereby affecting the effect of the emitted light 223. In a preferred embodiment, the geometric center of the light recycling portion is located on the projection α formed by the fluorescent light emitting device on the light path adjusting and emitting device under irradiation along the light path of the emitted light 223. At this time, the light recovery unit 201 blocks the small angle light emitted from the reflective fluorescent sheet 207, and the geometric center of the light recovery unit 201 is on the projection α of the reflective fluorescent sheet 207 on the outgoing light 223, which is equivalent to that the geometric center of the reflective fluorescent sheet 207 and the geometric center of the light recovery surface 201a are on the same straight line because the area of the reflective fluorescent sheet 207 is small. The small-angle light that light recovery face 201a sheltered from uses the optical axis of reflective fluorescence piece 207 as the center, has avoided first angle light 221 outgoing, has reduced stray light, and the colour of emergent light 223 is more even, and the illuminating effect is better.

The light-recycling surface 201a faces both the light-exiting surface 202a and the light-transmitting region 208. In combination with the disclosure of the present technical solution, the reflective fluorescent sheet 207 covers a portion of the light-transmitting area 208, the first angle light 221 emitted by the reflective fluorescent sheet 207 faces the light recycling surface 201a, and the second angle light 222 faces the light emitting surface 202 a. The light-recycling surface 201a and the light-emitting surface 202a are not spliced into a concave surface.

From the above analysis, it can be seen that the position of the reflective fluorescent sheet 207 in the light-transmitting region 208 affects the distance between the optical axis of the light emitted from the reflective fluorescent sheet 207 and the light-emitting surface 202 a. When the optical axis of the reflective fluorescent sheet 207 is not concentric with the transparent region 208, the light spot brightness of the emergent light 223 is not uniform or irregular in shape, which is not suitable for the illumination field. In a preferred embodiment, the geometric center of the transparent region 208 is located along the reverse optical path of the emergent light 223, and the fluorescent light emitting device is located on the projection β formed on the optical path adjusting emergent device. In the technical scheme, the distance from the second angle light 222 in any plane in the light emitting direction of the reflective fluorescent sheet 207 to the light emitting surface 202a is the same, the light spot formed by the emergent light 223 has more uniform brightness, and the shape of the light spot is a regular circular light spot.

The light-transmitting area 208 is too large, which reduces the area of the light path adjusting and emitting device, and the first angle light 221 and the second angle light 222 emitted from the light-transmitting area 208 are increased, which reduces the light utilization rate of the lighting device. In order to reduce the area of the light-transmitting region 208, the laser light 224 emitted from the laser source 206 is first received by the lens 210, so as to minimize the aperture size of the light beam formed by the laser light 224 and minimize the size of the light-transmitting region 208.

Example 3

As shown in fig. 5 and 6, in this embodiment, as in embodiment 1, a light emitting surface 302a and a light recycling surface 301a are spliced to form a concave surface, and a light emitting device emits light to the concave surface formed by the light recycling surface 301a and the light emitting surface 302a, which is different from embodiment 1 in that the light emitting surface 302a is an ellipsoid. The purpose of the light exit surface 302a being ellipsoidal is to obtain a converged exiting light 323. According to the properties of the ellipsoid, a beam of divergent light emitted at one focus of the ellipsoid is reflected by the spherical surface of the ellipsoid, and then the beam of divergent light is converged at the other focus of the ellipsoid. The light emitting surface 302a corresponds to the first focal point 331 and the second focal point 332, the fluorescent light emitting device is disposed at the first focal point 331, and the emitted light 323 formed by the second angle light 322 emitted by the fluorescent light emitting device after being reflected by the light emitting surface 302a is converged at the second focal point 332.

This embodiment is the same as embodiment 2, and the light emitting device is a fluorescent light emitting device and a laser light source 306 for exciting the fluorescent light emitting device. In order to make the laser 324 emitted from the laser source 306 excite the fluorescence emitting device, a light-transmitting region 308 is added in embodiment 2. The following drawback of the light-transmitting region 308 is easily obtained according to the disclosure of embodiment 2, 1. the area of the light path adjusting exit device is occupied. 2. Causing the first angle light 321 and the second angle light 322 to exit the light transmissive region 308, reducing the utilization of the laser light 324 in the lighting device. In order to solve the above problem, in a preferred embodiment, a lens 311 made of a transparent material is disposed in the light-transmitting region 308, and a surface of the lens 311 is plated with an optical coating layer for transmitting laser light 324 to reflect the first angle light 321 and the second angle light 322. The light-transmitting area 308 is filled with a lens 311 made of a transparent material, and an optical coating layer for transmitting laser 324 to reflect the first angle light 321 and the second angle light 322 is coated on the lens 311, so that the first angle light 321 and the second angle light 322 are prevented from being emitted out of the light path adjusting and emitting device from the light-transmitting area 308, and the waste of light is reduced.

As is clear from the conservation of optical expansion, the light exit surface 302a corresponds to a light emitting surface, and the light emission intensity of the emitted light 323 is proportional to the area of the light exit surface 302a at this time, so as to increase the light emission intensity of the lighting device, in the case of a fluorescent light emitting device, the light intensity of the lighting device can be increased by increasing the area of the light exit surface 302 a. In this embodiment, the optical path adjusting device includes a light emitting surface 302a, a light recovery surface 301a, a light transmissive region 308, and a projection formed by the fluorescent light emitting device on the optical path adjusting light emitting device on the reverse optical path of the emitted light 323. Increasing the area of the light exit surface 302a requires reducing the area of the light recovery surface 301a, the light transmissive region 308, and the projection of the fluorescent light emitting device on the light path adjustment exit device. In a preferred embodiment, the geometric center of the light-transmitting region 308 is positioned under the irradiation along the reverse light path of the emergent light 323, and the fluorescent light-emitting device forms a projection a on the light path adjusting emergent device on the reverse light path of the emergent light 323; the geometric center of the light recycling part is located in a projection A' formed by the fluorescent light emitting device on the light path adjusting and emitting device under the irradiation of the reverse light path along the emergent light 323, and the lens 311 is a part of the light recycling part 301. According to the above technical solution, when the projection a coincides with the projection a', the area of the light emitting surface 302a on the light path adjusting and emitting device is further increased.

In order to reduce the area of the projection of the fluorescent light-emitting device on the adjustment emission device on the backward light path of the emission light 323, a preferred embodiment is to use a reflective fluorescent sheet 307 for the fluorescent light-emitting device. The reflective fluorescent sheet 307 has a small area, and the projected area formed on the optical path adjustment emission device by the emission light 323 in the reverse optical path is small, which contributes to an increase in the area of the light emission surface 302 a.

The light-transmitting area 308 serves as a passage for the laser light 324, in order to reduce the area of the light-transmitting area 308, a light-receiving lens 310 is added between the laser light source 306 and the light-transmitting area 308, the light-receiving lens 310 reduces the divergence angle of the laser light 324, and the area of the light-transmitting area 308 can be further reduced, which helps to increase the area of the light-exiting surface 302 a.

The laser 324 emitted by the laser source 306 is first converged by the light receiving lens 310 and then passes through the lens 311 which is provided with a transparent material in the light transmitting area 308, and then the reflective fluorescent sheet 307 is excited, and in order to reduce the projection area of the reflective fluorescent sheet 307 on the light path adjusting and emitting device formed by the reverse light path of the emitted light 323, the area of the reflective fluorescent sheet 307 needs to be as small as possible, so that the light beam of the laser 324 after passing through the light receiving lens 310 and the lens 311 cannot be divergent. That is, the curvature of the lens 311 is smaller than that of the light-collecting lens 310.

Since the light exit surface 302a and the light recovery surface 301a are spliced to form a concave surface, in order to realize the recovery of the first angle light 321 and the emission of the second angle light 322, the position of the reflective fluorescent sheet 307 needs to be strictly controlled, theoretically, the reflective fluorescent sheet 307 needs to be located on the first focal point 331 of the light exit surface 302a, and the center of the circle corresponding to the light recovery surface 301a coincides with the first focal point 331. Since the outgoing light exits from one side of the light emitting device in example 1, the device for fixing the LED light emitting chip cannot be considered to block light, so that the cover plate is used for fixing the LED light emitting chip, the outgoing light 323 exits around the light emitting device in this embodiment, so a preferred embodiment is that a heat pipe 305 is arranged on the optical path of the outgoing light 323, a reflective fluorescent sheet 307 is fixedly arranged on the heat pipe 305, and the reflective fluorescent sheet 307 is located on a first focus 331. The heat pipe 305 reduces the shielding of the outgoing light 323 emitted around the reflective phosphor sheet 307, and also serves to fix the reflective phosphor sheet 307.

In order to further reduce the shielding of the heat pipe 305 from the outgoing light 323, a preferred embodiment is to flatten the heat pipe toward the outgoing light 323 to reduce the shielding of the outgoing light 323 and avoid the waste of the outgoing light 323. Since the reflective phosphor plate 307 is excited by the laser beam 324 to generate a large amount of heat, in order to avoid the shielding of the outgoing light 323 by the heat pipe 305, the heat pipe 305 is flattened, so that the contact area between the heat pipe 305 and the reflective phosphor plate 307 is reduced, and in order to sufficiently conduct the heat generated by the reflective phosphor plate 307 to the heat pipe 305, the fixing base 333 is added, the fixing base 333 is sufficiently in contact with the reflective phosphor plate 307, and the reflective phosphor plate 307 transmits the generated heat to the heat pipe 305 through the fixing base 333, and secondly, the fixing base 333 can further more firmly fix the reflective phosphor plate 307.

Example 4:

as shown in fig. 7, in an illumination device, a light recycling surface 401a is a spherical surface, a light emitting surface 402a is a paraboloid, a light transmitting hole 434 is disposed on the light recycling surface 401a, light emitted from a transmissive fluorescent sheet 407 is first angle light 421 and second angle light 422, wherein the first angle light 421 is reflected by the light recycling surface 401a to the transmissive fluorescent sheet 407, the second angle light 422 is emitted through the light transmitting hole 434, the light emitting surface 402a is disposed on an emitting light path of the second angle light 422, and the second angle light 422 is reflected by the light emitting surface 402a to form an emitting light 423. At this time, the emitting direction of the emitting light 423 may be controlled according to the included angle between the light emitting surface 402a and the second angle light 422, and the emitting light 423 and the laser 424 are no longer parallel, and may be applied to special lighting requirements.

The light emitting devices in embodiments 2 and 3 each include a fluorescent light emitting device, and the fluorescent light emitting devices are each a reflective fluorescent sheet, and in order to apply the reflective fluorescent sheet to embodiments 2 and 3, a large number of auxiliary devices are added to achieve the purpose. For example, in embodiment 2, the method of exciting the reflective fluorescent sheet by reflecting the laser beam 424 with the mirror increases the manufacturing cost, the manufacturing difficulty, and the complexity of the structure due to the addition of the mirror. In example 3, the reflective fluorescent sheet needs to be used by disposing a heat pipe on the optical path of the outgoing light 423, and the heat pipe blocks the outgoing light 423 even if it is flattened. In a preferred embodiment, the fluorescent light emitting device is a transmissive fluorescent sheet 407. The transmissive fluorescent sheet 407 solves the problem of difficulty in guiding the laser light 424 to excite the fluorescent light emitting device, and also avoids the influence on the outgoing light 423.

The present invention is not limited to the embodiments described above, but the embodiments are only preferred embodiments of the present invention and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should fall within the patent coverage of the present invention.

Claims

1. An illumination device, characterized by: the light path adjusting and emitting device comprises a light recovery part, a light emitting part, a light recovery part and a peripheral area of the light emitting part, and further comprises a light emitting device, wherein light emitted by the light emitting device comprises first angle light and second angle light, at least one part of the first angle light emits light to the light recovery part, the light recovery part reflects the part of the first angle light back to the light emitting device, the light emitting device has the effect of scattering reflection on the first angle light, at least one part of the second angle light emits light to the light emitting part, the light emitting part reflects the part of the second angle light, and the second angle light reflected by the light emitting part forms emergent light.

2. A lighting device as recited in claim 1, wherein: the emergent light is emitted towards the light-emitting device and is emitted from one side of the light-emitting device or around the light-emitting device.

3. A lighting device as recited in claim 1, wherein: the light emergent part comprises a light emergent surface, the light recycling part comprises a light recycling surface, and the light emergent surface and the light recycling surface are spliced to form a concave surface.

4. A lighting device as recited in claim 1, wherein: the light-emitting device comprises a fluorescent light-emitting device and a laser light source for exciting the fluorescent light-emitting device, and laser emitted by the laser light source excites the fluorescent light-emitting device and then is excited.

5. A lighting device as recited in claim 4, wherein: the light path adjusting and emitting device comprises a light transmitting area, laser emitted by the laser source passes through the light transmitting area and then excites the fluorescent light emitting device, the geometric center of the light transmitting area is positioned under irradiation of a reverse light path along emergent light, and the fluorescent light emitting device is arranged on a projection formed on the light path adjusting and emitting device.

6. A lighting device as recited in claim 5, wherein: the lens is characterized in that a lens made of transparent materials is arranged in the light transmitting area, and an optical coating layer which transmits laser and reflects light at a first angle and light at a second angle is plated on the surface of the lens.

7. A lighting device as recited in claim 6, wherein: the lens is part of the light recovery section.

8. A lighting device as recited in claim 1, wherein: the geometric center of the light recovery part is positioned on the projection formed by the fluorescent light-emitting device on the light path adjusting and emitting device under the irradiation of the emergent light or the reverse light path of the emergent light.

9. A lighting device as recited in claim 3, wherein: the light recycling surface is a spherical surface, and the light emergent surface is a spherical surface, an ellipsoid surface or a paraboloid.

10. A light fixture, characterized by: a lighting device comprising any one of claims 1-9.