Lighting device and lamp

Abstract

The present invention provides a lighting device and a lamp with low safety hazards and improved brightness of emitted light, comprising a laser light source, a reflective fluorescent light-emitting device and a light emitting portion, wherein the laser emitted by the laser light source excites the reflective fluorescent light-emitting device to emit a stimulated light, and the stimulated light passes through the light emitting portion to form a light cone; a reflector, which is located at the edge of the light cone and reflects the laser from the laser light source to the reflective fluorescent light-emitting device; a light-collecting device is arranged between the reflector and the laser light source, and the laser reaches the reflector after being collected by the light-collecting device; a first aperture is arranged between the reflector and the light-collecting device, and the first aperture also includes a light-transmitting hole, and the laser reaches the first aperture after being collected by the light-collecting device, and reaches the reflector after passing through the light-transmitting hole. The use of the reflector and the aperture in combination reduces the proportion of laser in the emitted light, thereby increasing safety; the laser excites the fluorescent material to obtain a high-brightness stimulated light, thereby significantly improving the brightness of the emitted light.

Description

Technical Field

[0001] The present invention relates to the field of lighting technology, and in particular to a lighting device and a lamp. Background Art

[0002] As technology develops, light sources are also updated, and people's requirements for the light emitted from light sources are becoming more and more stringent. Tungsten filament lamps, xenon lamps and LED lamps, people have been pursuing higher brightness light, and laser light sources have entered people's field of vision.

[0003] Laser light source is an electric light source that uses excited particles to emit light under the action of stimulated radiation. It has the characteristics of high brightness, good color, low energy consumption, long life and small size. It is widely used in car lights, stage lights, projectors and other fields. The laser emitted by the laser light source excites the fluorescent material to emit fluorescence, and this fluorescence also has a series of advantages of laser. However, when the laser emitted by the laser light source excites the fluorescent material to produce fluorescence, there will always be a part of the laser emitted along with the fluorescence. If this part of the emitted laser exceeds a certain threshold, there will be safety hazards. In addition, some randomly emitted lasers will also form stray light, which greatly affects the visual effect of the emitted light guide. If the fluorescence generated by the fluorescent material cannot be collected and utilized, it will be difficult to improve the overall brightness of the emitted light. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned traditional technology. The present invention provides a lighting device and a lamp that can reduce safety hazards, improve light utilization and enhance the brightness of emitted light.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: an illumination device, comprising a laser light source, a reflective fluorescent light-emitting device and a light emitting portion, the laser emitted by the laser light source excites the reflective fluorescent light-emitting device to emit stimulated light, and the stimulated light forms an emitted light cone after passing through the light emitting portion; also comprising a reflector, the reflector is located at the edge of the light cone, and the reflector reflects the laser from the laser light source to the reflective fluorescent light-emitting device; with the optical axis of the laser emitted by the laser light source as the boundary, the side close to the light emitting portion is the first direction, and the side away from the light emitting portion is the second direction; a light focusing device is arranged between the reflector and the laser light source, the laser emitted by the laser light source is focused by the light focusing device and reaches the reflector, and the laser forms a light spot on the surface of the light focusing device when passing through the light focusing device; also comprising a first aperture, the first aperture Located between the reflector and the light focusing device, the first aperture also includes a light-transmitting hole, and the laser light focused by the light focusing device reaches the first aperture, and then reaches the reflector after passing through the light-transmitting hole of the first aperture; the laser light axis emitted by the laser light source is the y-axis, and a straight line perpendicular to the y-axis is drawn from the second direction to the first direction through the intersection of the y-axis and the first aperture, and the straight line is the x-axis; the light spot on the surface of the light focusing device is a long strip, and the direction in which the long strip light spot extends is its polarity direction, and the polarity direction is perpendicular to the plane where the x-axis and the y-axis are located, and the projection length of the projection line segment of the light spot on the plane where the x-axis and the y-axis are located on the x-axis is 2r; the projection length of the distance from the light spot on the surface of the light focusing device to the first aperture on the y-axis is d, the projection length of the distance from the first aperture to the reflector on the y-axis is D, and the projection length of the distance from the laser light axis to the outermost edge of the reflector in the first direction on the x-axis is R, The distance from the edge of the first aperture to the y-axis in the first direction is q.

[0006] As an improvement of the above technical solution: an illumination device, comprising a laser light source, a reflective fluorescent light emitting device and a light emitting portion, wherein the laser light emitted by the laser light source excites the reflective fluorescent light emitting device to emit stimulated light; further comprising a reflector, which reflects the laser light from the laser light source to the reflective fluorescent light emitting device; with the optical axis of the laser light emitted by the laser light source as the boundary, the side close to the light emitting portion is the first direction, and the side away from the light emitting portion is the second direction; a light focusing device is arranged between the reflector and the laser light source, the laser light emitted by the laser light source is focused by the light focusing device and reaches the reflector, and when the laser light passes through the light focusing device, a light spot is formed on the surface of the light focusing device; further comprising a first aperture, the first aperture is located between the reflector and the light focusing device, the first aperture also comprises a light-transmitting hole, the laser light focused by the light focusing device reaches the first aperture, and reaches the reflector after passing through the light-transmitting hole of the first aperture; It also includes a second aperture, which is located on the side of the light emitting part away from the reflective fluorescent light emitting device, and the stimulated light emitted from the light emitting part is shaped by the second aperture before being emitted; the laser light axis emitted by the laser light source is the y-axis, and a straight line perpendicular to the y-axis is drawn from the second direction to the first direction through the intersection of the y-axis and the first aperture, and the straight line is the x-axis; the light spot on the surface of the light collecting device is a long strip, and the direction in which the long strip light spot extends is its polarity direction, which is perpendicular to the plane where the x-axis and the y-axis are located, and the side of the long strip light spot that is perpendicular to its polarity direction is parallel to the plane where the x-axis and the y-axis are located, and the projection length of the side of the light spot parallel to the plane where the x-axis and the y-axis are located on the x-axis is 2r; the projection length of the distance from the light spot on the surface of the light collecting device to the first aperture on the y-axis is d, the projection length of the distance from the first aperture to the second aperture on the y-axis is D, and the projection length of the distance from the laser light axis to the second aperture at the edge of the first direction on the x-axis is R, The distance from the edge of the first aperture to the y-axis in the first direction is q.

[0007] As an improvement of the above technical solution: it also includes a light recovery unit, which is arranged around the light emitting unit, collects light emitted by the reflective fluorescent light-emitting device that cannot be emitted from the light emitting unit, and reflects the collected light back to the reflective fluorescent light-emitting device.

[0008] As an improvement of the above technical solution: the light recovery part is a spherical surface.

[0009] As an improvement of the above technical solution: it also includes a position adjustment device, which is connected to the reflective fluorescent light-emitting device and is used to adjust the distance between the reflective fluorescent light-emitting device and the light recovery part.

[0010] As an improvement of the above technical solution: the position adjustment device includes a fixing block with external threads and a fixing hole with internal threads, the fixing block is connected to the fixing hole by threads, and the reflective fluorescent light-emitting device is connected to a side of the fixing block away from the fixing hole.

[0011] As an improvement of the above technical solution: it also includes a reflector adjustment device for adjusting the position of the reflector.

[0012] As an improvement of the above technical solution: the light-transmitting hole is in the shape of an elongated strip, and the extending direction of the elongated light-transmitting hole is parallel to the polarity direction of the light spot.

[0013] As an improvement of the above technical solution: the inner wall of the light-transmitting hole is black.

[0014] As an improvement of the above technical solution: a lamp comprises any lighting device described above.

[0015] Due to the adoption of the above technical scheme, compared with the prior art, the present invention can reduce the laser emitted from the lighting device to the greatest extent, avoid the emitted laser exceeding the safety threshold, and reduce safety hazards; and the generated stimulated light is collected and utilized by the light recovery unit, avoiding the waste of light energy while improving the brightness of the emitted light.

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the lighting device.

[0018] Figure 2 It is the optical path diagram of the laser emitted by the laser light source when it passes through the focusing lens.

[0019] Figure 3 This is the main view of the lighting device after adding the first aperture.

[0020] Figure 4 It is a structural diagram of the lighting device.

[0021] Figure 5 It is a top view of the light focusing device.

[0022] Figure 6 This is the front view of the lighting device of Example 2.

[0023] Figure 7 This is a structural diagram of the lighting device of Example 2.

[0024] Figure 8 This is a top view of the lighting device of Example 2.

[0025] Fig. 9 Schematic diagram of the optical path of Example 3.

[0026] Fig.10 It is a structural schematic diagram of the position adjustment device.

[0027] Fig.11 It is a structural schematic diagram of the reflector adjustment device.

[0028] Fig.12 This is a structural diagram of the lighting device of Example 4.

[0029] Fig.13 This is a structural diagram of the lighting device of Example 5.

[0030] Fig.14 This is a top view of the lighting device of Example 5.

[0031] Fig.15 Schematic diagram of the light spot of Example 5. DETAILED DESCRIPTION

[0032] Embodiment 1:

[0033] With the continuous upgrading of lamps, laser lighting has entered people's field of vision. However, in the field of laser lighting, the stray light contained in the emitted light greatly affects people's visual effects. To address this problem, the present invention proposes a new type of lighting device. Figure 1The lighting device shown in the figure includes a laser light source 111, a reflective fluorescent light emitting device 112 and a light emitting portion 113. The laser light 121 emitted by the laser light source 111 excites the reflective fluorescent light emitting device 112 to emit a stimulated laser light 122. The stimulated laser light 122 passes through the light emitting portion 113 to form an emitted light cone 122a. The lighting device also includes a reflector 114. The reflector 114 is located at the edge of the light cone 122a and reflects the laser light 121 from the laser light source 111 to the reflective fluorescent light emitting device 112. The reflector 114 is located at the edge of the light cone 122a ... The side of the light emitting portion 113 is the first direction, and the side away from the light emitting portion 113 is the second direction; a light collecting device 115 is arranged between the reflector 114 and the laser light source 111, and the laser light 121 emitted by the laser light source 111 reaches the reflector 114 after being collected by the light collecting device 115, and a light spot is formed on the surface of the light collecting device 115 when the laser light 121 passes through the light collecting device 115; in the present invention, we adopt the method that the laser light source 111 emits the laser light 121 to excite the reflective fluorescent light emitting device 112 to emit the stimulated laser light 121, the purpose is to reduce the proportion of laser light contained in the emitted light and reduce safety hazards. The laser light 121 emitted by the laser light source 111 is reflected by the reflector 114 and reaches the reflective fluorescent light emitting device 112, and then the reflective fluorescent light emitting device 112 is excited by the laser light 121 and emits the stimulated laser light 122, and finally the stimulated laser light 122 passes through the light emitting portion 113 and is emitted. Among them, the light emitted from the light emitting portion 113 will form a cone, that is, a light cone 122a. The light emitting portion 113 mentioned in the present invention can be transparent glass or a transparent film, or it can be pure air, as long as it can realize the function of light emission. The reflector 114 needs to be set at the edge of this light cone 122a, the purpose is to make the laser 121 incident on the reflective fluorescent light-emitting device 112 at a minimum incident angle after being reflected by the reflector 114, so as to reduce the degree of deformation of the laser 121 forming a light spot on the reflective fluorescent light-emitting device 112. Although the laser 121 has the characteristics of high directivity, it still has the problem of light diffusion. Therefore, we set up a light focusing device 115 to focus the laser 121. Preferably, the light focusing device 115 is a convex lens, which itself has the function of converging and focusing light, and has a low cost, which meets our requirements. In addition, the light focusing device 115 can also play a role in controlling the size of the light spot formed by the laser 121 on the reflective fluorescent light-emitting device 112. If the laser 121 is not converged by the light focusing device 115, the light spot on the reflective fluorescent light emitting device 112 will become larger due to light diffusion. The larger light spot reduces the central light intensity, thereby reducing the overall brightness of the light emitted from the light emitting portion.After the laser light is focused by the light-collecting device 115, the light spot formed on the reflective fluorescent light-emitting device 112 is smaller and brighter, and the brightness of the laser light emitted from the light-emitting portion is also improved. However, there is a big drawback in using the light-collecting device 115 to collect the laser light 121, that is, the light-collecting device 115 must be highly clean, and there must not be any dust or scratches on the surface of the light-collecting device 115. If there is dust or scratches on the surface of the light-collecting device 115, the laser light 121 emitted after passing through the light-collecting device 115 will be... Figure 2 As shown, this causes the laser 121 to be divided into two parts, one part is the laser 121a that can be emitted normally, and the other part is the laser 121b that is emitted randomly. If these lasers 121b that are emitted in all directions pass through the light emitting portion 113 and are emitted together with the stimulated laser 122, the light spots formed by the light emitted from the light emitting portion 113 will have different colors, which is the so-called stray light. Moreover, if the laser directly irradiates the human body, there will also be safety hazards. In order to solve the problem of scratches on the light focusing device 115, it is necessary to take protective measures during the transportation of accessories and to perform fine control during installation. In order to solve the problem of dust on the light focusing device 115, it is necessary to design strict sealing measures, and even adjust the positions of various components of the entire device, but this requires too much technical difficulty. So if Figure 3 The lighting device shown in the figure also includes a first aperture 116, which is located between the reflector 114 and the light focusing device 115. The first aperture 116 also includes a light-transmitting hole 116a. The laser light focused by the light focusing device 115 reaches the first aperture 116, and then reaches the reflector 114 after passing through the light-transmitting hole 116a of the first aperture 116. The aperture is used to block the light randomly emitted in all directions, which is low in cost and does not require the lighting device to be redesigned for highly stringent sealing conditions. Although the aperture can be used to block the randomly emitted laser light, this also places high requirements on the position accuracy of the first aperture 116. If the position of the first aperture 116 deviates too much, the following two situations may occur: the first situation is that the first aperture 116 cannot completely block the laser light emitted in all directions, which will cause light leakage; the second situation is that the first aperture 116 can block the laser light emitted randomly in all directions, but at the same time it will also block the normally emitted laser light, so that the normally emitted laser light cannot completely pass through the light-transmitting hole 116a of the first aperture 116, resulting in insufficient laser light received by the reflective fluorescent light-emitting device 112, resulting in a reduction in the amount of laser light emitted by the reflective fluorescent light-emitting device 112, and thus insufficient brightness of the emitted light. The following is a detailed explanation of the position of the first aperture 116. Figure 4 As shown, the laser light axis emitted by the laser light source 111 is the y-axis, and a straight line perpendicular to the y-axis is drawn from the second direction to the first direction through the intersection of the y-axis and the first aperture 116, and the straight line is the x-axis. Figure 5 The top view of the light collecting device 115 shown in the figure shows that the light spot 123 on the surface of the light collecting device 115 is in the shape of an elongated strip, and the direction in which the elongated light spot 123 extends is its polarity direction, which is perpendicular to the plane where the x-axis and the y-axis are located, and the projection length of the projection line segment of the light spot on the plane where the x-axis and the y-axis are located on the x-axis is 2r; the projection length of the distance from the light spot 123 on the light collecting device 115 to the first aperture 116 on the y-axis is d, the projection length of the distance from the first aperture 116 to the reflector 114 on the y-axis is D, and the projection length of the distance from the laser optical axis to the outermost edge of the reflector 114 in the first direction on the x-axis is R, The distance from the edge of the light-transmitting hole 116a of the first aperture 116 in the first direction to the y-axis is q. We use the laser light axis emitted by the laser light source 111 as the y-axis; then draw a straight line perpendicular to the y-axis from the second direction to the first direction through the intersection of the y-axis and the first aperture 116, and this straight line is the x-axis. The plane where the x-axis and the y-axis are located is used as the reference plane. The laser emitted by the laser light source we usually use will form a long strip of light spot when irradiated on an object, so the light spot 123 left on the surface of the light focusing device 115 when the laser passes through the light focusing device 115 is a long strip, wherein the direction in which the long strip of light spot extends is its polarity direction. The principle is that the laser emitted by the laser light source itself has a fast axis and a slow axis, and the fast axis and the slow axis are perpendicular to each other and the different angles between them cause the laser to form a long strip of light spot when forming the light spot. Preferably, the light-transmitting hole 116a is a long strip, and the extension direction of the long strip of light-transmitting hole 116a is parallel to the polarity direction of the light spot. The purpose of this arrangement is to allow the focused laser light emitted from the light focusing device 116 to pass through the light-transmitting hole 116a of the first aperture 116 as much as possible. These focused laser lights are the main lights that excite the reflective fluorescent light-emitting device 112 to generate the stimulated light 122, so the loss of these lights needs to be minimized. Furthermore, the polarity direction of the long strip light spot 123 should be perpendicular to the reference plane formed by the x-axis and the y-axis. This design is to allow more laser light passing through the light focusing device 115 to pass through the light-transmitting hole 116a to the greatest extent. Figure 4As shown in the structural diagram, it is assumed that the projection length of the projection line segment of the light spot on the plane where the x-axis and the y-axis are located on the x-axis is 2r, the projection length of the distance from the light spot on the surface of the light focusing device 115 to the first aperture 116 on the y-axis is d, the projection length of the distance from the first aperture 116 to the reflector 114 on the y-axis is D, and the projection length of the distance from the laser optical axis to the reflector 114 at the edge of the first direction on the x-axis is R, so that two sets of coordinates can be obtained: A (R, D) and B (-r, -d), where point A is the point where the reflector 114 is located at the edge of the first direction, and point B is the point where the long strip of light spot 123 is located at the edge of the second direction. If the laser emitted from point B can be blocked by point A of the reflector 114 at the edge of the first direction, then the laser 121b randomly emitted from the light focusing device 115 will be blocked by the reflector 114. Therefore, by connecting point A and point B as a straight line, the formula can be obtained: In order to reduce the first aperture 116 from blocking the laser that can excite the reflective fluorescent light emitting device 112, the aperture of the light-transmitting hole 116a cannot be too small. The laser that can excite the reflective fluorescent light emitting device 112 is basically the main light that can pass through the light-collecting device 115 and form a long strip of light spot on the surface of the light-collecting device 115. Therefore, the aperture of the light-transmitting hole 116a needs to be greater than or equal to 2r, that is, on the straight line In the equation, when y=0, x≥r, we can get After simplification, we can get Only when the design of each element in the invention satisfies this formula, the laser light after being focused by the light emitting device 115 can mostly pass through the light-transmitting hole 116a and reach the reflective fluorescent light emitting device 112. However, in practical use, while ensuring that most of the laser light after being focused by the light-emitting device 115 can pass through the light-transmitting hole 116a, it is also necessary to realize the function of the first aperture 116 to block the stray light randomly emitted due to dust. If the aperture of the light-transmitting hole 116a of the first aperture 116 is too small or the position of the light-transmitting hole 116a is slightly deviated, the laser light passing through the light-transmitting hole 116a will be reduced, which will reduce the laser light that can excite the reflective fluorescent light emitting device 112 to produce stimulated laser light, thereby reducing the light emitted from the light emitting portion 113 and reducing the brightness; and if the aperture of the light-transmitting hole 116a is too large, the laser light randomly emitted due to dust on the light-emitting device 115 may also pass through the light-transmitting hole 116a and be emitted at the same time. Therefore, the position and size of the light-transmitting hole 116a at the edge in the first direction are extremely important. Assuming that the distance from the edge of the light-transmitting hole 116a of the first aperture 116 to the y-axis in the first direction is q, the straight line The intersection with the x-axis is So only satisfaction Only when the brightness of the outgoing light is guaranteed can the proportion of stray light in the outgoing light be reduced.

[0034] In order to further reduce the stray light in the light emitted from the light emitting portion 113, a preferred embodiment is that the inner wall of the light-transmitting hole 116a is black. After measuring the emitted light 122 of the lighting device, it was found that some stray light was still emitted. After repeatedly replacing the components and in multiple experiments, it was found that when the inner wall of the light-transmitting hole 116a was black, some stray light in the emitted light 122 would be reduced again. After disassembling the lighting device, it was found that if the inner wall of the light-transmitting hole 116a of the first aperture 116 was white or other colors, part of the laser light passing through the light-transmitting hole 116a would be reflected by the inner wall of the light-transmitting hole 116a, and then this part of the laser light reflected by the inner wall of the light-transmitting hole 116a would pass through the light emitting portion 113 and then be emitted, thus forming stray light. Black can absorb light, so in order to reduce the stray light reflected by the inner wall of the light-transmitting hole 116a, an aperture with a black inner wall of the light-transmitting hole 116a can be selected as the first aperture 116.

[0035] In the present invention, the thickness of the first aperture 116 used is extremely small and can be ignored, so only the distance to the first aperture 116 can be calculated without considering the error caused by selecting the upper surface or lower surface of the first aperture 116 as the reference surface.

[0036] In summary, the inventors of this embodiment have conducted rigorous experimental demonstration and finally deduced that and When the various components inside the device are designed in accordance with the two formulas, the proportion of stray light in the light emitted from the light emitting portion 113 is minimal, and the brightness of the emitted light will not be reduced, thereby achieving the best emission effect of the emitted light.

[0037] Embodiment 2:

[0038] However, the design in Example 1 still has defects. Figure 2 In the optical path diagram shown in FIG. 1 , the positions of the first aperture 116 and the reflector 114 require very high precision. Once an error occurs, stray light will inevitably appear in the light emitted from the light emitting portion 113. Therefore, in order to solve this defect, as shown in FIG. Figure 6In the example diagram of the lighting device structure shown in the figure, a second aperture 217 is arranged outside the light emitting portion, that is, on the side of the light emitting portion away from the reflective fluorescent light emitting device. An lighting device includes a laser light source 211, a reflective fluorescent light emitting device 212 and a light emitting portion 213. The laser light 221 emitted by the laser light source 211 excites the reflective fluorescent light emitting device 212 to emit stimulated light 222; and also includes a reflector 214, which reflects the laser light 221 from the laser light source 211 to the reflective fluorescent light emitting device 212; with the optical axis of the laser light 221 emitted by the laser light source 211 as the boundary, the side close to the light emitting portion 213 is a first direction, and the side away from the light emitting portion 213 is a second direction A light-collecting device 215 is disposed between the reflector 214 and the laser light source 211. The laser light 221 emitted by the laser light source 211 reaches the reflector 214 after being collected by the light-collecting device 215. When the laser light 221 passes through the light-collecting device 215, a light spot is formed on the surface of the light-collecting device 215. A first aperture 216 is also included. The first aperture 216 is located between the reflector 214 and the light-collecting device 215. The first aperture 216 also includes a light-transmitting hole 216a. The laser light 221 collected by the light-collecting device 215 reaches the first aperture 216. The laser beam 211 is a laser beam having ... The extending direction is its polarity direction, which is perpendicular to the plane where the x-axis and the y-axis are located. The side of the long strip light spot perpendicular to its polarity direction is parallel to the plane where the x-axis and the y-axis are located. The projection length of the side of the light spot parallel to the plane where the x-axis and the y-axis are located on the x-axis is 2r; the projection length of the distance from the light spot on the surface of the light focusing device 215 to the first aperture 216 on the y-axis is d, the projection length of the distance from the first aperture 216 to the second aperture 217 on the y-axis is D, and the projection length of the distance from the laser optical axis to the second aperture 217 at the edge in the first direction on the x-axis is R. The distance from the edge of the first aperture light-transmitting hole 216a in the first direction to the y-axis is q. In this embodiment, the propagation of the optical path is basically the same as that in Embodiment 1. The laser light source 211 emits a laser, which is reflected by the reflector 214 and reaches the reflective fluorescent light-emitting device 212. Then, the laser excites the reflective fluorescent light-emitting device 212 to emit a stimulated laser 222, which is emitted after passing through the light emitting portion 213. In order to reduce the diffusion degree of the laser, we choose to use a light focusing device 215 to focus the laser. In order to prevent the randomly emitted laser 221b generated by dust or scratches when the laser 221 passes through the light emitting portion 213, the first aperture 216 is used to block the randomly emitted laser 221b. However, in this embodiment, the function of the reflector 214 to block the light emitted from the light-transmitting hole 216a of the first aperture 216 at the edge of the first direction is realized by the second aperture 217. That is to say, the function of the reflector 214 is only to twist the optical path of the laser 221a, which greatly reduces the installation accuracy requirements of the reflector 214. The second aperture 217 shapes the light emitted from the light emitting portion 213 and also blocks part of the randomly emitted laser light, so that this part of the randomly emitted laser light cannot be emitted, thereby reducing the stray light in the emission. Therefore, among the lasers emitted by the laser light source 211, the light that diffuses in the first direction or the second direction cannot be emitted from the light emitting portion 213. Similarly, each component in this embodiment needs to comply with the two formulas derived by the inventor through experimental demonstration: and like Figure 7 As shown in the lighting device structure diagram, in these two formulas, the projection length of the distance from the first aperture 116 to the reflector 114 on the y-axis is D in Example 1, which is changed to the projection length of the distance from the first aperture 216 to the second aperture 217 on the y-axis is D in this embodiment. While the projection length of the distance from the laser optical axis to the reflector 114 at the edge of the first direction on the x-axis is R in Example 1, it is changed to the projection length of the distance from the laser optical axis to the second aperture 217 at the edge of the first direction on the x-axis in this embodiment. In this embodiment, two viewpoints can also be obtained: A (R, D) and B (-r, -d), where point A is the point where the second aperture 217 is located at the edge of the first direction, and point B is the point where the long strip light spot 223 is located at the edge of the second direction. If the laser emitted from point B can be blocked by point A at the edge of the second aperture 217 in the first direction, then the laser 221b randomly emitted from the light converging device 215 will be blocked by the second aperture 217. This design allows the reflector 214 to be repositioned as needed, and also allows the position of the light spot formed by the laser reflected by the reflector 214 and irradiated on the reflective fluorescent light-emitting device 212 to change with the position of the reflector 214, thereby making the light emitted from the light emitting portion 213 more effective. Figure 8 shown.

[0039] In summary, the difference between this embodiment and the first embodiment is that the function of the reflector 214 to block light is realized by the second aperture 217, which reduces the installation accuracy requirements of the reflector 214 and the installation position of the reflector 214 can also be redesigned. In addition, the second aperture 217 also plays a shaping role on the light emitted from the light emitting portion 213, so that the effect of the emitted light better meets people's requirements.

[0040] Embodiment 3:

[0041] In the above two embodiments, the emitted light can only be emitted from the light emitting portion, and the emitted light is only a part of the converted light emitted by the reflective fluorescent light emitting device, while the other part of the converted light that cannot be emitted is wasted. Therefore, in this embodiment, in order to make full use of the light energy and reduce energy waste, Fig. 9 In the optical path diagram of the lighting device shown in the figure, a preferred embodiment further includes a light recycling part 318, which is arranged around the light emitting part 313. The light recycling part 313 collects the light 322b emitted by the reflective fluorescent light emitting device 312 that cannot be emitted from the light emitting part 313, and reflects the collected light 322b back to the reflective fluorescent light emitting device 312. The inner wall of the light recycling part 318 is plated with a reflective material, and the light recycling part 318 is arranged around the light emitting part, so that the converted light emitted from the reflective fluorescent light emitting device 312 cannot be emitted to the surroundings at will, and can only be emitted through the light emitting part 318 to obtain the output light we need. The light recycling part 318 also allows the converted light 322b that cannot be emitted to be recycled. These converted light 322b that cannot be emitted are reflected back to the reflective fluorescent light emitting device 312 by the light recycling part 318, and are reflected by the reflective fluorescent light emitting device 312 again and then emitted through the light emitting part 313, thereby increasing the utilization rate of light. In order to make the reflective fluorescent light emitting device 312 better receive the stimulated light collected by the light recycling part 318, the light recycling part 318 is preferably a spherical surface. According to the geometric principle, the light emitted from the center of the sphere will return to the center of the sphere after being reflected by the inner wall of the sphere, so the light recycling part 318 is preferably a spherical surface. In theory, the reflective fluorescent light emitting device 312 is also preferably set at the center of the light recycling part 318. However, in actual operation, due to factors such as manufacturing errors or human operation errors of the light recycling part 318, the reflective fluorescent light emitting device 312 only needs to be set near the center of the sphere.

[0042] There will be errors when the reflector 314 is installed. If the position of the reflector 314 or the reflection angle of the laser changes, the position of the reflective fluorescent light emitting device 312 also needs to be fine-tuned. Therefore, a preferred embodiment further includes a position adjustment device 301, which is connected to the reflective fluorescent light emitting device 312 and is used to adjust the distance between the reflective fluorescent light emitting device 312 and the light recycling unit 318. The reflective fluorescent light emitting device 312 also requires high precision during installation, so there is a probability that errors will occur when installing the reflective fluorescent light emitting device 312, so a position adjustment device 301 can be set to correct the position of the reflective fluorescent light emitting device 312. The light recycling unit 318 uses a spherical surface, and there will be processing errors in the light recycling unit 318 during the processing. At this time, in order to adjust the position between the reflective fluorescent light emitting device 312 and the center of the light recycling unit 318, the position adjustment device 301 is also needed. There is also the problem of the size of the light spot formed when the laser is irradiated on the reflective fluorescent light emitting device 312. Although there is a light focusing device 316 to focus the laser, so that the spot formed by the laser on the reflective fluorescent light-emitting device 312 is smaller, due to factors such as errors in various components, the spot formed by the laser on the reflective fluorescent light-emitting device 312 cannot reach our expectations. If the spot formed by the laser on the reflective fluorescent light-emitting device 312 is too large, it will cause the central light intensity of the stimulated light 322 emitted by the reflective fluorescent light-emitting device 312 to be low, thereby causing the central light intensity of the stimulated light 322 emitted from the light emitting portion to be low; and if the spot is small, the area excited by the laser is too concentrated, which may cause the reflective fluorescent light-emitting device to be locally overheated in the excitation area, resulting in burning. Therefore, the position adjustment device 301 also has the function of adjusting the size of the laser spot on the reflective fluorescent light-emitting device 312. Due to factors such as errors in various components, it may also cause the problem of inconsistent positions of the laser spot on the reflective fluorescent light-emitting device 312 and the spot formed by the light 322b received from the light recovery unit 318. If the laser spot on the reflective fluorescent light emitting device 312 and the spot formed by the light 322b from the light recycling unit 318 are not in the same position, the light emitted from the light emitting unit 313 will form two light beams in the far field, which greatly affects the visual effect and also poses a safety hazard. Therefore, the position adjustment device 301 can also indirectly adjust the positions of the two light spots by adjusting the position of the reflective fluorescent light emitting device 312 to prevent the two light spots from being in the same position. The structural diagram of the position adjustment device 301 in the present invention is shown in FIG. Fig.10As shown, it includes a fixed block 301a with an external thread and a fixed hole 301b with an internal thread, the fixed block 301a is connected to the fixed hole 301b by threads, and the reflective fluorescent light-emitting device 312 is connected to the side of the fixed block 301a away from the fixed hole 301b. The external thread of the fixed block 301a is connected to the internal thread of the fixed hole 302b. The fixed block 301a can be raised and lowered by rotating the fixed block 301a, so that the reflective fluorescent light-emitting device 312 fixed on the fixed block 301a also rises and falls with the rise and fall of the fixed block 301a. In this way, the position change of the reflective fluorescent light-emitting device 312 is achieved, and the position and size of the light spot on the reflective fluorescent light-emitting device 312 can be changed. Of course, a pneumatic or hydraulic lifting platform can also be used to adjust the position of the reflective fluorescent light-emitting device 312. We do not limit it here. As long as the function of adjusting the position of the reflective fluorescent light-emitting device 312 is achieved, it is within the protection scope of this patent.

[0043] With regard to the light spot position problem in this embodiment, the position of the light spot formed by the laser on the reflective fluorescent light emitting device 312 can also be changed by other methods. One preferred implementation is to further include a reflector adjustment device 302 for adjusting the position of the reflector 314. The reflector adjustment device is as follows: Fig.11 As shown, the reflector adjustment device 302 is a groove on the light recycling unit 318, and the position of the reflector 314 is adjusted in the reflector adjustment device, so that the optical path of the light reflected by the reflector 314 is changed, so that the position of the light spot formed by the laser on the reflective fluorescent light emitting device 312 is changed. When adjusting the position of the light spot formed by the laser on the reflective fluorescent light emitting device 312, it is used in conjunction with the position adjustment device 301, and the best effect can be achieved when adjusting the position of the laser light spot on the reflective fluorescent light emitting device 312 and the light spot formed by the light from the light recycling unit 318.

[0044] To sum up, in this embodiment, the light recovery part 318 is used to further reduce the stray light emitted from the light emitting part and further increase the light utilization efficiency of the entire lighting device; and in order to adjust the effect of the light emitted from the light emitting part, the position adjustment device 301 and the reflector adjustment device 302 are introduced. The position adjustment device 301 and the reflector adjustment device 302 cooperate with each other to achieve the purpose of reducing errors and adjusting the light spot position to enhance the brightness and visual effect of the emitted light.

[0045] Embodiment 4:

[0046] like Fig.12As shown, in order to further increase the brightness of the light emitted from the light emitting portion, the reflective fluorescent light emitting device 412 in this embodiment includes an LED light emitting chip 412a, which has the function of reflecting light itself, and a fluorescent material layer 412b is provided on the light emitting side of the LED light emitting chip. The laser from the reflector 414 excites the fluorescent material layer 412b to emit stimulated light, and the light emitted by the LED light emitting chip 412a also excites the fluorescent material layer 412b to emit stimulated light, and together with the light emitted by the LED light emitting chip itself, the brightness of the light beam emitted from the light emitting portion 413 is greatly increased; and the LED chip 412a is very low in cost and easy to obtain, and can be used in large-scale production.

[0047] Embodiment 5:

[0048] like Fig.13 As shown in FIG. 1 , in order to increase the brightness of the light emitted from the light emitting portion 513, this embodiment adopts another method. A plurality of reflectors are arranged at the edge of the emitted light cone, and each reflector is correspondingly provided with a laser light source. The plurality of reflectors reflect the laser light emitted by the corresponding laser light source to the reflective fluorescent light emitting device 512. In this embodiment, three reflectors are used as an example for explanation. The top view of this embodiment is shown in FIG. Fig.14 As shown. The light emitted from the light emitting portion 513 will form a light cone 522a. An additional reflector can be added at the edge of the light cone 522a. Each reflector has a laser light source, a focusing lens and an aperture between the focusing lens and the reflector. Each reflector reflects the laser light emitted by the laser light source corresponding to it to the reflective fluorescent light emitting device 512, and excites the reflective fluorescent light emitting device 512 to emit stimulated laser light. Multiple laser light sources excite the same reflective fluorescent light emitting device 512, which makes the reflective fluorescent light emitting device 512 convert more laser light, thereby emitting more stimulated laser light, which also makes the brightness of the light beam emitted from the light emitting portion higher. Moreover, when the laser light emitted by the laser light source passes through the focusing lens, a long strip of light spot is formed on the surface of the focusing lens, but the long strip of light spot can be changed by changing the distance between the focusing lens and the laser light source to change the shape of the long strip of light spot formed by the laser on the focusing lens, that is, focusing is performed by using the focusing lens. When the distance between the focusing lens and the laser light source reaches a certain degree, the long strip of light spot will be focused into an approximate square. At this time, three laser light sources are arranged in an equilateral triangle around the reflective fluorescent light emitting device. Since the fast axis directions of the lasers emitted by the three laser light sources are different, the lasers emitted by the three laser light sources will form three square light spots on the reflective fluorescent light emitting device, but the three square light spots will not overlap each other. However, when these three approximately square light spots are superimposed together, they will form an approximately circular light spot, such as Fig.15This makes the converted light emitted from the light emitting portion brighter and the light distribution of the converted light more uniform.

[0049] The above describes several embodiments of the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should fall within the scope of the patent coverage of the present invention.

Claims

1. An illumination device, comprising a laser light source, characterized in that: The invention also includes a reflective fluorescent light-emitting device and a light emitting portion, wherein the laser light emitted by the laser light source excites the reflective fluorescent light-emitting device to emit stimulated light, and the stimulated light forms an emitted light cone after passing through the light emitting portion; the invention also includes a reflector, which is located at the edge of the light cone and reflects the laser light from the laser light source to the reflective fluorescent light-emitting device; with the optical axis of the laser light emitted by the laser light source as the boundary, the side close to the light emitting portion is the first direction, and the side away from the light emitting portion is the second direction; a light focusing device is arranged between the reflector and the laser light source, and the laser light emitted by the laser light source reaches the reflector after being focused by the light focusing device, and a light spot is formed on the surface of the light focusing device when the laser light passes through the light focusing device; the invention also includes a first aperture, which is located between the reflector and the light focusing device, and the first aperture is The aperture also includes a light-transmitting hole. The laser light converged by the light-converging device reaches the first aperture, and reaches the reflector after passing through the light-transmitting hole of the first aperture. The laser light axis emitted by the laser light source is the y-axis. A straight line perpendicular to the y-axis is drawn from the second direction to the first direction through the intersection of the y-axis and the first aperture, and the straight line is the x-axis. The light spot on the surface of the light-converging device is in the shape of an elongated strip. The direction in which the elongated strip light spot extends is its polarity direction, which is perpendicular to the plane where the x-axis and the y-axis are located. The projection length of the projection line segment of the light spot on the plane where the x-axis and the y-axis are located on the x-axis is 2r. The projection length of the distance from the light spot on the surface of the light-converging device to the first aperture on the y-axis is d, the projection length of the distance from the first aperture to the reflector on the y-axis is D, and the projection length of the distance from the laser light axis to the outermost edge of the reflector in the first direction on the x-axis is R. The distance from the edge of the first aperture to the y-axis in the first direction is q.

2. A lighting device according to claim 1, characterized in that: It also includes a light recycling part, which is arranged around the light emitting part. The light recycling part collects light emitted by the reflective fluorescent light emitting device that cannot be emitted from the light emitting part, and reflects the collected light back to the reflective fluorescent light emitting device.

3. A lighting device according to claim 2, characterized in that: The light recovery part is a spherical surface.

4. A lighting device according to claim 3, characterized in that: It also includes a position adjustment device, which is connected to the reflective fluorescent light-emitting device and is used to adjust the distance between the reflective fluorescent light-emitting device and the light recycling part.

5. A lighting device according to claim 4, characterized in that: The position adjustment device comprises a fixing block with external threads and a fixing hole with internal threads, the fixing block is connected to the fixing hole through threads, and the reflective fluorescent light emitting device is connected to a side of the fixing block away from the fixing hole.

6. The lighting device according to claim 1, characterized in that: Also included is a reflector adjustment device for adjusting the position of the reflector.

7. The lighting device according to claim 1, characterized in that: The light-transmitting hole is in the shape of an elongated strip, and the extending direction of the elongated light-transmitting hole is parallel to the polarity direction of the light spot.

8. The lighting device according to claim 1, characterized in that: The inner wall of the light-transmitting hole is black.

9. An illumination device, comprising a laser light source, characterized in that: It also includes a reflective fluorescent light-emitting device and a light emitting portion, the laser light emitted by the laser light source excites the reflective fluorescent light-emitting device to emit stimulated light; it also includes a reflector, which reflects the laser light from the laser light source to the reflective fluorescent light-emitting device; with the optical axis of the laser light emitted by the laser light source as the boundary, the side close to the light emitting portion is the first direction, and the side away from the light emitting portion is the second direction; a light focusing device is arranged between the reflector and the laser light source, the laser light emitted by the laser light source is focused by the light focusing device and reaches the reflector, and when the laser light passes through the light focusing device, a light spot is formed on the surface of the light focusing device; it also includes a first aperture, which is located between the reflector and the light focusing device, and the first aperture also includes a light-transmitting hole, the laser light focused by the light focusing device reaches the first aperture, and reaches the reflector after passing through the light-transmitting hole of the first aperture; it also includes a second aperture, which is located between the reflector and the light focusing device, and the first aperture also includes a light-transmitting hole, the laser light reaches the first aperture after being focused by the light focusing device ... On the side of the light emitting portion away from the reflective fluorescent light emitting device, the stimulated light emitted from the light emitting portion is shaped by the second aperture and then emitted; the laser light axis emitted by the laser light source is the y-axis, and a straight line perpendicular to the y-axis is drawn from the second direction to the first direction through the intersection of the y-axis and the first aperture, and the straight line is the x-axis; the light spot on the surface of the light collecting device is in the shape of an elongated strip, and the direction in which the elongated strip light spot extends is its polarity direction, and the polarity direction is perpendicular to the plane where the x-axis and the y-axis are located, and the side of the elongated strip light spot that is perpendicular to its polarity direction is parallel to the plane where the x-axis and the y-axis are located, and the projection length of the side of the light spot parallel to the plane where the x-axis and the y-axis are located on the x-axis is 2r; the projection length of the distance from the light spot on the surface of the light collecting device to the first aperture on the y-axis is d, the projection length of the distance from the first aperture to the second aperture on the y-axis is D, and the projection length of the distance from the laser light axis to the second aperture at the edge of the first direction on the x-axis is R, The distance from the edge of the first aperture to the y-axis in the first direction is q.

10. The lighting device according to claim 9, characterized in that: It also includes a light recycling part, which is arranged around the light emitting part. The light recycling part collects light emitted by the reflective fluorescent light emitting device that cannot be emitted from the light emitting part, and reflects the collected light back to the reflective fluorescent light emitting device.

11. A lighting device according to claim 10, characterized in that: The light recovery part is a spherical surface.

12. The lighting device according to claim 11, characterized in that: It also includes a position adjustment device, which is connected to the reflective fluorescent light-emitting device and is used to adjust the distance between the reflective fluorescent light-emitting device and the light recycling part.

13. A lighting device according to claim 12, characterized in that: The position adjustment device comprises a fixing block with external threads and a fixing hole with internal threads, the fixing block is connected to the fixing hole through threads, and the reflective fluorescent light emitting device is connected to a side of the fixing block away from the fixing hole.

14. The lighting device according to claim 9, characterized in that: Also included is a reflector adjustment device for adjusting the position of the reflector.

15. The lighting device according to claim 9, characterized in that: The light-transmitting hole is in the shape of an elongated strip, and the extending direction of the elongated light-transmitting hole is parallel to the polarity direction of the light spot.

16. The lighting device according to claim 9, characterized in that: The inner wall of the light-transmitting hole is black.

17. A lamp, characterized in that: A lighting device comprising any one of claims 1-16.

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