WO2018214391A1

WO2018214391A1 - Illuminating device

Info

Publication number: WO2018214391A1
Application number: PCT/CN2017/106583
Authority: WO
Inventors: 刘超博
Original assignee: 欧普照明股份有限公司
Priority date: 2017-05-26
Filing date: 2017-10-17
Publication date: 2018-11-29
Also published as: EP3511614B1; EP3511614A1; EP3511614A4

Abstract

An illuminating device (100b), comprising a lamp body (1b), an optical element (2b) connected to the lamp body (1b), a driving power supply component (4b) accommodated in the lamp body (1b), a light source component (3b), and a reflecting device (5b) used for secondarily distributing light to the light source component (3b). The reflecting device (5b) has a light inlet (55b), a light outlet (56b), and a reflecting wall (50b) located between the light inlet (55b) and the light outlet (56b); the reflecting wall (50b) is transparent and comprises an inner surface (51b) and an outer surface (52b); the inner surface (51b) comprises a plurality of continuously-arranged sawtooth structures (510b); each sawtooth structure (510b) comprises a first refracting surface (511b) and a second refracting surface (512b) intersecting each other; two ends of each sawtooth structure (510b) extend toward the light inlet (55b) and the light outlet (56b) respectively; the light source component (3b) is disposed at the light inlet (55b) of the reflecting device (5b). The inner surface (51b) of the reflecting wall (50b) of the illuminating device (100b) comprises the plurality of continuously-arranged sawtooth structures (510b), the inner surface (51b) serves as a light incident surface and a light exit surface at the same time, and the outer surface (52b) serves as a reflecting surface. By means of such a design, light incident through the inner surface (51b) can exit by means of a total-reflection optical effect, and the light exit efficiency is improved without needing electroplating treatment.

Description

Lighting device

Technical field

The invention belongs to the technical field of illumination, and in particular relates to a lighting device.

Background technique

Existing electroplated reflectors are widely used in commercial lighting applications, such as in downlights such as downlights, spotlights, ceiling lights, and outdoor lighting. The plated reflector mainly plays the role of secondary light distribution to the light emitted by the light source. The plated reflector generally includes a reflective surface coated with a metal film, but the coating material itself has a high absorption rate of light, for example, the loss rate of the silver plating film is 5%, the loss rate of the gold plating film is 9%, and the aluminum plating is performed. The loss rate of the film is as high as about 12%, which makes the light-emitting efficiency of the lamp using the plated reflector low.

Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide an illumination device which has high light extraction efficiency.

In order to achieve the above object, the present invention provides a lighting device including a lamp body, an optical component connected to the lamp body, a light source component housed in the lamp body, and a secondary light distribution device for the light source component. a reflecting device, and a driving power component electrically connected to the light source component, the reflecting device has a light entrance port, a light exit port, and a reflective wall between the light entrance port and the light exit port, the reflective wall is transparent The reflective wall includes an inner surface and an outer surface.

The inner surface includes a plurality of continuously arranged sawtooth structures, each of the sawtooth structures including intersecting first and second refractive surfaces, and each of the two ends of the sawtooth structure respectively respectively toward the light entrance and The light exit extends,

The light source assembly is disposed at a light entrance of the reflective device.

Further, the reflecting device is annular, and the thickness of the reflecting device is uniform.

Further, the first refractive surface and the second refractive surface are perpendicular to each other.

Further, the outer surface of the reflective wall is a smooth wall surface and is a total reflection surface.

Further, the diameter of the light entrance opening is smaller than the diameter of the light exit opening, and both ends of the sawtooth structure extend to the light entrance opening and/or the light exit opening.

Further, the first refractive surface and the second refractive surface of the sawtooth structure intersect with a ridge line, and the ridge line is a straight line or an arc.

Further, an angle between a tangent line at any point on the ridge line and a plane where the light entrance port is located is smaller than A, and the A is 40°.

Further, A is equal to 38° when the material of the reflective wall is PC, and A is equal to 30° when the material of the reflective wall is acrylic.

Further, the reflective walls are two and oppositely disposed, and each of the reflective walls has a flat shape.

Further, the reflecting device further includes a connecting plate disposed between the reflective walls.

Further, the lighting device further includes a heat dissipating member housed in the lamp body, and the light source assembly and the driving power source assembly are both housed in the heat dissipating member.

Further, upper and lower end faces and/or surfaces of the heat sink abut between the optical component and the housing.

Further, the light source component and the driving power component are arranged in an integrated manner or in a separate manner.

Further, the driving power component is disposed separately from the light source component, and the driving power component comprises an annular power board and a driving power source on a side of the power board, and the light source component is located inside the power board.

Further, the light source assembly includes a light source panel and a plurality of light emitting units located on the light source panel.

Further, the lighting device further includes a connecting member disposed on a periphery of the lamp body, and the connecting member is respectively connected to the lamp body and the optical element.

Further, the optical component includes a face ring and a light homogenizing plate located inside the face ring.

Further, the face ring comprises a vertical annular body and a horizontal annular annular surface integrally connected with the body, the body being respectively connected to the lamp body and the optical element.

Further, the lighting device further includes two circlips, and the circlip is connected to the outside of the connecting member.

Further, the lighting device further includes a driving power supply box connected to the lamp body, and the driving power supply component is housed in the driving power supply box.

Further, the illumination device comprises a first stage reflector and a second stage reflector, the reflection device is a first stage reflector, and the optical element is a second stage reflector in a reflector configuration.

Further, the illuminating device further includes a light concentrating plate covering the light exiting opening of the reflecting device, and the reflecting hood is located above the light absorbing plate.

Further, the optical component includes a face ring located outside the reflector, and the face ring is coupled to the lamp body.

Further, an optical space is formed between the light entrance opening, the light exit opening and the inner surface of the reflecting device, and the light emitted by the light source assembly is partially refracted through the inner surface into the reflective wall, and reflected by the reflective wall into the optical space. And exiting through the light exit port, and partially passing through the optical space and ejecting from the light exit port.

Advantageous Effects: Compared with the prior art, the illumination device provided by the embodiment of the present invention has an inner surface of the internal reflection device including a plurality of sawtooth structures arranged in a continuous manner, and the inner surface serves as both a light incident surface and a light exit surface, and the outer surface serves as an outer surface. The reflecting surface is designed such that the light incident from the inner surface can be emitted by the optical effect of total reflection, and the light extraction efficiency is improved without performing the plating treatment.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a perspective view of a lighting device according to Embodiment 1 of the present invention;

Figure 2 is an exploded perspective view of the lighting device of Figure 1;

Figure 3 is an exploded perspective view of another angle of the lighting device of Figure 1;

4 is a perspective view of a reflection device in a lighting device according to Embodiment 1 of the present invention;

Figure 5 is a cross-sectional view taken along line A-A of Figure 1;

6 is a schematic view showing an angle between a ridge line of a reflecting device and a plane of a light source plate in a lighting device according to Embodiment 1 of the present invention;

7 is a schematic diagram of a light path in a vertical direction taking a single sawtooth structure as an example according to Embodiment 1 of the present invention;

8 is a schematic diagram of a light path in a horizontal direction taking a single sawtooth structure as an example according to Embodiment 1 of the present invention;

FIG. 9 is a perspective view of a lighting device according to Embodiment 2 of the present invention; FIG.

Figure 10 is an exploded perspective view of the lighting device of Figure 9;

Figure 11 is an exploded perspective view showing another angle of the lighting device of Figure 9;

Figure 12 is a cross-sectional view taken along line B-B of Figure 9;

FIG. 13 is a perspective view of a lighting device according to Embodiment 3 of the present invention; FIG.

Figure 14 is an exploded perspective view of the lighting device of Figure 13;

Figure 15 is an exploded perspective view showing another angle of the lighting device of Figure 13;

Figure 16 is a cross-sectional view taken along line C-C of Figure 13;

17 is a perspective view of a lighting device according to Embodiment 4 of the present invention;

18 is an exploded perspective view of the lighting device of FIG. 17.

detailed description

The technical solutions of the present invention will be clearly and completely described in conjunction with the specific embodiments of the present invention and the accompanying drawings. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Example 1

As shown in Figures 1 to 4, an embodiment of the present invention provides a lighting device 100a which is a spotlight. Specifically, the illumination device 100a includes a lamp body 1a, an optical element 2a connected to the lamp body 1a, a heat sink 6a housed in the lamp body 1a, a drive power source assembly 4a housed in the heat sink 6a, a light source assembly 3a, and A reflecting device 5a that is secondarily distributed to the light source unit 3a. Among them, the light source unit 3a is disposed at one end of the reflecting device 5a. It should be noted that the reflecting device 5a is annular and transparent, and the light portion emitted from the light source unit 3a is directly emitted through the optical element 2a, and partially reflected by the reflecting device 5a, and then emitted by the optical element 2a.

The respective components and the connection relationship between the components in the illumination device 100a provided by the embodiments of the present invention are specifically described below.

As shown in Fig. 2, the lamp body 1a has a cylindrical shape, and the lamp body 1a and the optical element 2a are connected to form a housing cavity 10a. The light source unit 3a, the driving power source unit 4a, the reflecting device 5a and the heat dissipating member 6a are housed in the housing chamber 10a. Specifically, the lamp body 1a includes a bottom wall 11a and a side wall 12a. The inner surface of the side wall 12a is provided with a plurality of protrusions 121a. In other alternative embodiments, it may also be a groove. The lamp body 1a may be made of a heat conductive metal material such as aluminum, or may be integrally formed of a heat conductive plastic or a plastic coated aluminum material, so that the lamp body 1a has high thermal conductivity, and heat is generated when the light source unit 3a located in the housing chamber 10a generates heat. It can be quickly dissipated through the lamp body 1a, thereby avoiding the excessive temperature in the receiving cavity 10a and affecting the use quality and service life of the light source assembly 3a.

As shown in Fig. 2, Fig. 3 and Fig. 5, the optical element 2a has a circular shape and is snap-connected to the lamp body 1a. In the present embodiment, the optical element 2a functions as a uniform light. Specifically, the optical element 2a includes a circular top wall 21a and a plurality of holding structures 22a and abutting structures 23a extending downward from the top wall 21a. The protrusion 121a is received in the holding structure 22a to realize the engagement between the lamp body 1a and the optical element 2a. The abutting structure 23a is for pressing the heat sink 6a against the lamp body 1a.

The heat sink 6a is in the shape of a cover, and the light source unit 3a and the driving power source unit 4a are housed in the heat sink 6a. In this embodiment, the heat dissipating member 6a abuts between the lamp body 1a and the optical element 2a. Specifically, the lower surface of the heat dissipating member 6a is in contact with the bottom wall 11a of the lamp body 1a, and the upper end surface of the heat dissipating member 6a is optical. The end faces of the abutting structure 23a of the element 2a abut. The heat sink 6a may be made of a heat conductive metal material such as aluminum, or may be integrally formed of a plastic aluminum material.

As shown in FIGS. 2 and 3, the light source unit 3a includes a light source board 31a and a light emitting unit 32a located on the light source board 31a. Specifically, the light emitting unit 32a is disposed in the middle of the light source panel 31a, that is, in the middle of the opening of one end of the reflecting device 5a. In this embodiment, the light emitting unit 32a is an LED light source, and the number of the light emitting units 32a may be one or more. When the number of the light emitting units 32a is plural, the light emitting units 32a need to be collectively disposed on the reflecting device 5a. The central area of the light entrance 55a. In the present embodiment, the light source panel 31a is fixed inside the heat sink 6a, and is positioned by a positioning surface (not shown) provided on the lamp body 1a.

The drive power source unit 4a includes an annular power supply board 41a and an LED drive power source 42a on the side of the power supply board 41a. In the present embodiment, the power board 41a is located outside the light source board 31a and above the light source board 31a. The LED drive power supply 42a includes several components including, but not limited to, LED drive controller chips, rectifier chips, resistors, capacitors, fuses, and coils. The illuminating device 100a of the present embodiment further includes a power cord 7a extending into the lamp body 1a and soldered to the power board 41a. The power board 41a transmits the external power source to the LED driving power source 42a, and the LED driving power source 42a further drives the LED light source 32a. Glowing.

In other alternative embodiments, the LED light source 32a and the LED driving power source 42a may also be integrated on the same substrate by using a Through Hole Technology (THT) or a Surface Mount Technology (SMT). Figure)). The LED driving power source 42a may be a component in which a partial patch is disposed on the substrate with the LED light source 32a, a component on the other side of the substrate is provided with a reduced-cost plug-in driving power source, or a substrate in which the LED light source 32a is disposed. All patches on the side, or all plug-ins on the other side or partial patch-part plug-ins.

As shown in FIGS. 2 to 5, the reflecting means 5a has a lens as a reflecting wall 50a which is annular and uniform in thickness, and the reflecting wall 50a encloses an optical space 501a. This structure is similar to the existing reflectors, but the material is made of transparent material, the appearance is transparent, and it is easy to replace with the existing reflector. Specifically, the reflective wall 50a has The inner surface 51a, the outer surface 52a, the first end surface 53a and the second end surface 54a, the light entrance 55a of the reflecting device 5a is located at the first end surface 53a, and the light exit opening 56a is located at the second end surface 54a, that is, the reflective wall 50a is located at the light entrance 55a. Between the light exit port 56a. The light entrance 55a and the light exit 56a communicate with the optical space 501a, and the light source plate 31a encloses the light entrance 55a. The diameter of the light entrance 55a is smaller than the diameter of the light exit opening 56a. The inner surface 51a is a light incident surface of the reflecting device 5a, and is also a light emitting surface of the reflecting device 5a. Specifically, the inner surface 51a is composed of a continuous array of sawtooth structures 510a. Each of the sawtooth structures 510a includes intersecting first and second

refractive surfaces

511a, 512a, which are perpendicular to each other and intersect with ridge lines, which may be straight lines or arcs line. Both ends of each of the sawtooth structures 510a extend to the first end face 53a and the second end face 54a, respectively. The outer surface 52a is a smooth wall surface and is a total reflection surface. In other embodiments, the angle between the first refractive surface 511a and the second refractive surface 512a may not be 90°, that is, may be less than or greater than 90°, and the light effect of the reflective device 5a is at an angle of the sawtooth structure 510a. Optimal at 90°, the exiting light can be specularly totally reflected in the direction of the incident light. The angle of the sawtooth structure 510a is less than or greater than 90°, which will change the exit angle that the original busbar can reflect and reduce the light effect.

The reflecting device 5a is integrally formed of a transparent plastic or glass material, wherein the plastic material may be PMMA, PC or the like. The thickness of the reflecting means 5a can be made as thin as 2 mm, so that when the structural size of the reflecting means 5a is large, material cost and molding difficulty can be saved.

We know that to achieve total reflection inside the lens, the angle of incidence between the light and the reflective surface must be large enough, otherwise the light will be transmitted, and this angle will vary depending on the material of the lens. In order to allow the light incident on the reflecting means 5a to be totally reflected on the outer surface 52a, it is necessary to plan the angle of the light and the outer surface 52a. The incident angle of the incident angle in Fig. 8 is obviously insufficient to form a total reflection 52a. Not enough to form total reflection, the reason why it can be reflected here is because there is still a vertical component angle, as shown in Figure 5 and Figure 6, so that the horizontal component and the vertical component superimposed incident angle is large enough, so the vertical direction The angle of incidence must be greater than a certain angle to achieve total reflection. The angle of incidence in the vertical direction is greater than a certain angle, that is, the angle formed by the intersection of the ridge line formed by the intersection of the first refractive surface 511a and the second refractive surface 512a with the plane of the light source plate 31a needs to be less than a specific angle A, if When light is incident from the first refractive surface 511a or the second refractive surface 512a, refraction occurs, so that the incident angle of the light on the outer surface is increased, and if the light is incident from the ridge position to the horizontal direction, there is almost no angle, and it is most difficult to achieve total reflection. We consider that the design of the total reflection surface of the entire reflective wall 50a is to calculate the value of A by the optical path at the ridge position. This angle α is related to the refractive index of the reflective wall 50a. In this embodiment, the PC material is selected, A is 38°, if the material A having a higher refractive index can be 40°, and when PMMA is selected, A is 30. °. For the reflecting device 5a of the present embodiment, since the ridge line is an arc, the angle α between the tangent of each point on the ridge line and the plane of the light source plate should conform to the above limitation condition, that is, the value is smaller than A. Therefore, when the angle α is smaller than the angle A corresponding to the different materials (A is the angle corresponding to the different materials), the reflecting device 5a satisfies the total reflection condition. In other embodiments that do not require total reflection of the lens, the condition that the angle α is less than A may not be satisfied, that is, an arbitrary angle between 0 and 90 may be employed, which may form a transflective surface on the outer surface 52a. effect.

In addition, it should be noted that during the design or molding of the mold, due to the problem of processing accuracy, it will be reflected. The intersection of the first refractive surface 511a and the second refractive surface 512a of the device 5a is rounded, and the light incident on the round corner will be refracted to form stray light. The larger the round corner, the smaller the central light intensity, the stray light. The more the rounding formed by the existing machining accuracy has little effect on the total light effect and the beam angle of the reflecting device 5a, it is therefore considered that the reflecting device 5a is a total reflection lens.

The following is a detailed description of the direction of the light after the light-emitting unit 32a emits light into the inner surface 51a of the reflecting device 5a.

4 to 8, the light emitted from the light-emitting unit 32a enters from the light-incident port 55a, and the light is directly emitted from the light-emitting port 56a to the optical element 2a, and is partially emitted by the reflecting device 5a, and then emitted from the light-emitting port 56a. Finally, it is emitted by the optical element 2a. The specific light path is as follows:

The light is incident on the inner surface 51a of the reflective wall 50a, is refracted to the outer surface 52a via the first refractive surface 511a of the sawtooth structure 510a on the inner surface 51a, is totally reflected to the inner surface 51a via the outer surface 52a, and is refracted through the inner surface 51a. It enters the optical space 501a, is emitted outward from the light exit port 56a, and is finally emitted by the optical element 2a. Figure 8 shows a direction in which light enters the sawtooth structure 510a, and the light is totally reflected by the outer surface 52a to the second refractive surface 512a of the inner surface 51a. The other light (not shown) emitted from the light-emitting unit 32a is partially reflected by the outer surface 52a to the first refractive surface 511a of the inner surface 51a, and a portion is reflected by the outer surface 52a to the first refractive surface 511a and the second refractive surface 512a. Intersecting the ridges and then exiting. As shown in FIG. 6, as long as the angle α between the ridge line and the plane of the light source plate 31a satisfies the angular range corresponding to the different materials, the light incident on the reflective wall 50a can be totally reflected and emitted from the inner surface 51a.

Example 2

As shown in Figures 9 through 12, an embodiment of the present invention provides a lighting device 100b that is a downlight. Specifically, the illumination device 100b includes a lamp body 1b, an optical element 2b connected to the front end of the lamp body 1b, a connector 6b sleeved on the periphery of the lamp body 1b, two card springs 8b connected to the connector 6b, and a lamp connected thereto. a driving power supply box 7b at the rear end of the body 1b, a light source unit 3b housed in the lamp body 1b, a reflecting device 5b for secondary light distribution for the light source unit 3b, and a housing unit 5b housed in the driving power source box 7b and electrically connected to the light source unit 3b. The connected driving power supply unit 4b, wherein the light source unit 3b is disposed at one end of the reflecting device 5b. It should be noted that the reflecting device 5b is annular and transparent, and the light portion emitted from the light source unit 3b is directly emitted through the optical element 2b, and partially reflected by the reflecting device 5b and then emitted by the optical element 2b.

The respective components and the connection relationship between the components in the illumination device 100b provided by the embodiments of the present invention are specifically described below.

As shown in FIG. 10 to FIG. 12, the lamp body 1b has a cylindrical shape, and includes a bottom wall 11b and a side wall 12b. The bottom wall 11b is provided with a plurality of first through holes 111b, and the upper end of the side wall 12b extends with a ring shape. The connecting surface 120b and the connecting surface 120b are provided with a plurality of notches 121b. In the present embodiment, the shape of the notch 121b is semicircular. The lamp body 1b may be made of a heat conductive metal material such as aluminum, or may be made of a heat conductive plastic, so that the lamp body 1b has high thermal conductivity, and when the light source assembly 3b located in the lamp body 1b generates heat, heat can pass through the lamp body 1b. It is quickly dissipated, thereby avoiding excessive temperature in the lamp body 1b and affecting the use quality and service life of the light source unit 3b.

As shown in FIG. 10 to FIG. 12, the optical element 2b has a function of uniform light. Specifically, it includes a face ring 21b and a light-homogenizing plate 22b located inside the face ring 21b. In this embodiment, the light-homogenizing plate 22b abuts on the surface. Between the ring 21b and the reflecting means 5b, in other alternative embodiments, the light-immising plate 22b can be secured within the lighting device 100b by other means of attachment. The face ring 21b may be made of a metal material or plastic, and includes a vertical annular body 211b and a horizontal annular annular surface 212b integrally connected to the body 211b. Specifically, the inner surface of the body 211b is provided with a plurality of first connecting structures 2110b. The first connecting structure 2110b includes a bump 2111b and a strip 2112b on both sides of the bump 2111b. The strip 2112b extends along the axial direction of the body 211b. . The body 211b is provided with a plurality of positioning posts 2113b. The positioning posts 2113b extend in the axial direction and the end faces of the positioning posts 2113b exceed the end faces of the body 211b.

The connecting member 6b has a circular shape, and the outer side of the connecting member 6b is provided with a plurality of second connecting structures 610b and third connecting structures 620b. Specifically, the second connecting structure 610b includes a holding block 611b and a positioning groove 612b located at two sides of the holding block 611b, and the positioning groove 612b extends in the axial direction of the connecting member 6b. The third connection structure 620b includes a connection plate (not shown) provided with the second through hole 6211b and a snap spring mounting portion 6212b. In this embodiment, the first connecting structure 2110b and the second connecting structure 610b are connected to realize the connection between the connecting member 6b and the face ring 21b. Specifically, the clip 2112b is received in the positioning groove 612b to realize the connecting member 6b and the face ring 21b. Between the positioning, the bump 2111b is engaged with the lower surface of the holding block 611b to realize the connection between the connecting member 6b and the face ring 21b. Meanwhile, the illuminating device 100b of the present embodiment further includes a screw (not shown), and the screw is received in the positioning post 2113b through the second through hole 6211b, thereby further reinforcing the connection between the connecting member 6b and the face ring 21b, and The upper and lower surfaces of the connecting surface 120b abut against the surface ring 21b and the connecting member 6b, and the positioning post 2113b is positioned outside the notch 121b to fix the lamp body 1b between the face ring 21b and the connecting member 6b. In other alternative embodiments, the optical element 2b may be directly connected to the lamp body 1b without the connection member 6b, and the card spring 8b may be coupled to the optical element 2b.

In the present embodiment, the snap spring 8b is made of a metal material that is engaged in the circlip mounting portion 6212b.

As shown in FIGS. 10 to 12, the power supply case 7b includes a cover-shaped lower cover 71b and a plate-like upper cover 72b, and the lower cover 71b and the upper cover 72b are snap-fitted. A plurality of connecting posts 721b are protruded from the outer surface of the upper cover 72b, and the connecting post 721b is connected to the light source assembly 3b through the first through holes 111b. The lower cover 71b includes a first cover 711b and a second cover 712b, and the first cover 711b and the upper cover 72b are snap-fitted. The second cover 712b is detachably assembled with the first cover 711b.

The driving power supply unit 4b is connected to the inner surface of the upper cover 72b. Specifically, the driving power supply unit 4b includes an annular power supply board 41b and an LED driving power supply 42b on the side of the power supply board 41b. In this embodiment, the power supply board 41b and the upper side The cover 72b is snap-fitted. The LED drive power supply 42b includes several components including, but not limited to, LED drive controller chips, rectifier chips, resistors, capacitors, fuses, and coils. The lighting device 100b of the present embodiment further includes a power cord (not shown) that extends into the lower cover 71b and is soldered to the power board 41b. The power board 41b transmits the external power source to the LED driving power source 42b, and the LED driving power source 42b is further driven. The light source unit 3b emits light. In the present embodiment, the second cover 712b and the power supply board 41b are fixedly connected by screws (not shown) to securely connect the lower cover 71b to the power supply board 41b.

In this embodiment, the second cover 712b is inserted into the first cover 711b such that the first cover 711b and the second cover 712b are not movable relative to each other in the up and down direction, and further the second cover 712b and the power board 41b It can be detachably fixed by screws (not shown).

As shown in FIGS. 10 to 12, the light source unit 3b includes a light source board 31b and a light emitting unit 32b located on the light source board 31b. Specifically, the light emitting unit 32b is disposed in the middle of the light source panel 31b, that is, in the middle of the opening of one end of the reflecting device 5b. In the present embodiment, the light-emitting unit 32b is an LED light source, and a plurality of light-emitting units 32b are disposed, and are arranged in an array on the light source plate 31b. In other alternative embodiments, the drive power pack 4b can also be directly integrated on the light source panel 31b, and the drive power pack 7b can be retained but only shaped to match the existing lamp body 1b, which can be empty inside.

As shown in FIGS. 10 to 14, the reflecting device 5b has a lens as a reflecting wall 50b which is annular and uniform in thickness, and the reflecting wall 50b encloses an optical space 501b. The structure and optical path are similar to those of the reflecting device 5a in the embodiment. Specifically, the reflecting device 5b includes an inner surface 51b, an outer surface 52b, a light entrance 55b and a light exit 56b. The inner surface 51b includes a sawtooth structure 510b and an optical entrance. 55b and the light exit port 56b communicate with the optical space 501b, and the light source panel 31b closes the light entrance 55b. The difference between the reflecting means 5b and the reflecting means 5a is that the diameters of the light entrance opening and the light exit opening of the two reflecting means are different.

Moreover, in order to make the reflective wall 50b totally reflective, the angle formed between the ridge line formed by the intersection of the first refractive surface 511b and the second refractive surface 512b and the plane of the light source plate 31b also needs to be smaller than a specific angle A. In the present embodiment, the PC material is selected, A is 38°, if the material A having a higher refractive index is 40°, and when PMMA is used, A is 30°.

Example 3

As shown in FIG. 13 to FIG. 16, an embodiment of the present invention provides a lighting device 100c including a lamp body 1c, an optical element 2c connected to the front end of the lamp body 1c, and a lamp body 1c and an optical element 2c. a surface ring 6c, a light source unit 3c housed in the lamp body 1c, a reflecting device 5c for secondary light distribution for the light source unit 3c, and a light-receiving plate 4c covering the light-emitting opening of the reflecting device 5c, wherein the light source unit 3c is disposed in the reflection One end of the device 5c. It is to be noted that the reflecting device 5c is annular and transparent, and the light portion emitted from the light source unit 3c is directly emitted through the light-shading plate 4c, partially reflected by the reflecting device 5c, and then homogenized by the light-sharing plate 4c, and finally by the optical element 2c. Exit. The illumination device 100c of the present embodiment is a secondary reflective downlight, the reflection device 5c is a first-stage reflector, and the optical element 2c is a second-stage reflector in a reflector configuration. The illumination device 100c has a high light efficiency and does not have a large angle of stray light.

The respective components and the connection relationship between the components in the illumination device 100c provided by the embodiments of the present invention are specifically described below.

As shown in FIG. 13 to FIG. 16, the lamp body 1c is in the shape of a cover, and includes a bottom wall 11c and a side wall 12c. The inner surface of the side wall 12c is provided with a plurality of first receiving columns 121c and second receiving columns 122c. The lamp body 1c may be made of a heat conductive metal material such as aluminum, or may be made of a heat conductive plastic. The outer surface of the side wall 12c of the lamp body 1c is provided with heat dissipation fins, so that the lamp body 1c has high thermal conductivity when located in the lamp body 1c. When the light source component 3c inside generates heat, the heat can be The heat dissipation in the lamp body 1c is prevented from being excessively dissipated by the lamp body 1c, thereby affecting the use quality and the service life of the light source unit 3c.

As shown in FIGS. 13 to 16, the light source unit 3c includes a light source board 31c and a light emitting unit 32c located on the light source board 31c. Specifically, the light source panel 31c is fixed to the bottom wall 11c of the lamp body 1c by a screw (not shown), and the light emitting unit 32c is disposed in the middle of the light source panel 31c, that is, in the middle of the opening of one end of the reflecting device 5c. In the present embodiment, the light-emitting unit 32c is an LED light source, and a plurality of light-emitting units 32c are disposed, and are arranged in a circumferential array on the light source plate 31c. A driving power source unit (not shown) is disposed outside the lamp body 1c, and a power supply lead 7c connected to the driving power source unit is connected to the light source board 31c to further drive the light emitting unit 32c to emit light.

As shown in FIGS. 14 to 16, the reflecting means 5c has a lens as a reflecting wall 50c which is annular and uniform in thickness, and the reflecting wall 50c encloses an optical space 501c. The main structure and optical path are similar to those of the reflecting device 5a in Embodiment 1. Specifically, the reflecting device 5c includes an inner surface 51c, an outer surface 52c, a light entrance 55c and a light exit port 56c, and the inner surface 51c includes a sawtooth structure 510c. The optical port 55c and the light exit port 56c communicate with the optical space 501c, and the light source plate 31c encloses the optical port 55c. The reflection device 5c is different from the reflection device 5a in that a horizontal annular surface 57c is integrally connected to the end of the light exit opening 56c of the reflection device 5c, and the apertures of the light entrance opening and the light exit opening of the two reflection devices are different. Specifically, the horizontal toroidal surface 57c is provided with a plurality of holding structures 571c for fixing the light-homogenizing plate 4c; the annular surface 57c is further provided with a plurality of third through holes 572c, and the lighting device 100c of the embodiment is further A screw (not shown) is inserted into the first receiving post 121c through the third through hole 572c through the screw, thereby achieving connection between the reflecting device 5c and the lamp body 1c.

In the present embodiment, the light-homogenizing plate 4c is snapped onto the reflecting device 5c. In other alternative embodiments, the light-homogenizing plate 4c can be fixed in the lighting device 100c by other fixing means.

As shown in FIGS. 14 to 16, the face ring 6c may be made of a metal material or plastic, and includes a vertical annular body 61c and a horizontal annular annular surface 62c integrally connected to the body 61c. Specifically, the body 61c extends inward to form a connecting plate 610c, and the connecting plate 610c penetrates a plurality of fourth through holes 611c. The illuminating device 100c of the present embodiment further includes a screw (not shown) that is received in the second receiving post 122c through the fourth through hole 611c through the screw to realize the connection between the face ring 6c and the lamp body 1c. The first holding structure 612c and the second holding structure 613c are further disposed on the connecting plate 610c. The first holding structure 612c is a concave groove, and the second holding structure 613c includes a holding groove.

The optical element 2c is a second-stage reflector having a cover shape and is located inside the face ring 6c and connected to the face ring 6c. The optical element 2c can function as a shading angle to eliminate the effect of stray light at a large angle. The optical element 2c comprises an electroplated or painted side wall 21c which has only a reflective function. The outer surface of the side wall 21c is provided with a plurality of first protruding structures 211c and second protruding structures 212c. The first protruding structures 211c are snap-connected with the first holding structure 612c, and the second protruding structures 212c and The two holding structures 613c are snap-fitted to realize the connection between the optical element 2c and the face ring 6c.

Example 4

As shown in FIG. 17 to FIG. 18, Embodiment 4 of the present invention provides a lighting device 100d having a rectangular shape. A lamp body 1d, an optical element 2d connected to the lamp body 1d, a driving power source assembly 4d housed in the lamp body 1d, a light source unit 3d, and a reflecting device 5d for secondary light distribution for the light source unit 3d, wherein the light source unit 3d is provided at one end of the reflecting device 5d. It should be noted that the light portion emitted from the light source unit 3d is directly emitted through the optical element 2d, and partially reflected by the reflecting device 5d, and then emitted by the optical element 2d. The lighting device 100d can be applied to lighting fixtures such as ceiling lights, fresh lights, outdoor lights, and the like.

In the present embodiment, the reflecting means 5d has two oppositely disposed lenses as the reflecting walls 50d, and a connecting plate 58d is disposed between the two reflecting walls 50d to constitute a complete reflecting means. The connecting plate 58d may be enclosed by an optical space 501d together with the reflective wall 50d as shown in Fig. 18. The connecting plate 58d may also be disposed on the bottom surface, that is, the position of the light source assembly 3d in the figure, and the reflective wall 50d forms a bottom connection and the top is open. Structure. In other embodiments, it is also possible to form a square or polygonal reflecting means with four or more reflecting walls 50d without using a connecting plate. It should be noted that part of the light emitted by the light-emitting component 32d is refracted, reflected, and refracted by the reflective wall 50d, and then directly exits from the light-emitting opening by the inner surface 51d of the reflective wall 50d, and a part of the light is reflected by the connecting plate 58d. The inner surface (not shown) of the connecting plate 58d is directly emitted through the light exit opening.

The structure and optical path of the reflection wall 50d are similar to those of the reflection wall 50a of the reflection device 5a in the first embodiment, except that the reflection wall 50d has a plate shape, and the reflection wall 50a has a ring shape. The ridge line of the reflective wall 50d may be a straight line or an arc.

The connecting plate 58d is also in the form of a flat plate, and its two sides are in contact with the side surfaces of the reflecting wall 50d, and the upper and lower end faces thereof are flush with the upper and lower end faces of the reflecting wall 50d, thereby constituting the light emitting unit 32d around the reflecting wall 50d and the connecting plate 58d. The optical space is inside 501d. The inner surface of the connecting plate 58d is a total reflection surface. To form a total reflection surface, the connecting plate 58d can be made of a material having a total reflection function, such as plastic or metal, and can also be surface-treated, such as surface polishing and coating. deal with.

In summary, the illumination device provided by the embodiment of the present invention has a lens as a reflection device, and the outer surface thereof includes a plurality of sawtooth structures arranged in a continuous manner, and the inner surface serves as both the light incident surface and the light exit surface, and the outer surface The first reflecting surface and the second reflecting surface are designed such that the light incident from the inner surface can be emitted by the optical effect of total reflection, and the light extraction efficiency is improved without performing the plating treatment.

The specific embodiments of the present invention have been described in detail with reference to the preferred embodiments of the present invention. All modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

A lighting device includes a lamp body, an optical component connected to the lamp body, a light source component housed in the lamp body, a reflecting device for distributing light to the light source component, and an electrical component with the light source component a connecting driving power component, the reflecting device has a light entrance port, a light exit port, and a reflective wall between the light entrance port and the light exit port, the reflective wall is transparent, and the reflective wall includes an inner surface and an outer surface surface,

The inner surface includes a plurality of continuously arranged sawtooth structures, each of the sawtooth structures including intersecting first and second refractive surfaces, and each of the two ends of the sawtooth structure respectively respectively toward the light entrance and The light exit extends,

The light source assembly is disposed at a light entrance of the reflective device.
The lighting device of claim 1, wherein the reflecting means is annular and the reflecting means has a uniform thickness.
The illumination device according to claim 1, wherein the first refractive surface and the second refractive surface are perpendicular to each other.
The lighting device of claim 1, wherein the outer surface of the reflective wall is a smooth wall surface and is a total reflection surface.
The illumination device according to claim 1, wherein a diameter of the light entrance opening is smaller than a diameter of the light exit opening, and both ends of the sawtooth structure extend to the light entrance opening and/or the light exit opening.
The illumination device according to claim 1, wherein the first refractive surface and the second refractive surface of the sawtooth structure intersect with a ridge line, and the ridge line is a straight line or an arc.
The illumination device according to claim 1, wherein an angle between a tangent to an arbitrary point on the ridge line and a plane of the light entrance opening is less than A, and the A is 40°.
The illumination device according to claim 7, wherein A is equal to 38° when the material of the reflective wall is PC, and A is equal to 30° when the material of the reflective wall is acrylic.
The lighting device of claim 1, wherein the reflective walls are two and oppositely disposed, each of the reflective walls being flat.
The lighting device of claim 9, wherein the reflecting device further comprises a web disposed between the reflective walls.
The lighting device of claim 1, wherein the lighting device further comprises a heat sink housed in the lamp body, the light source assembly and the driving power source assembly being housed in the heat sink.
The illumination device of claim 11, wherein upper and lower end faces and/or surfaces of the heat sink abut between the optical element and the housing.
The lighting device of claim 1, wherein the light source assembly and the drive power source assembly are provided in one piece or in a separate arrangement.
The lighting device of claim 1, wherein the driving power supply assembly and the light source assembly are separately provided, the driving power supply assembly comprising an annular power supply board and a driving power source on a side of the power supply board, The light source assembly is located inside the power board.
A lighting device according to claim 1, 13 or 14, wherein said light source assembly comprises a light source panel and at least one light emitting unit located on said light source panel.
The lighting device of claim 1, wherein said lighting device further comprises a connector disposed around a periphery of said lamp body, said connector being coupled to said lamp body and said optical component, respectively.
The illumination device of claim 16 wherein said optical element comprises a face ring and a light homogenizing plate located inside the face ring.
The lighting device according to claim 17, wherein the face ring comprises a vertical annular body and a horizontal annular annular surface integrally connected with the body, the body and the lamp respectively The body is connected to the optical element.
The lighting device of claim 16, wherein the lighting device further comprises two snap springs, the snap spring being coupled to an outer side of the connector.
The lighting device according to claim 16, wherein said lighting device further comprises a driving power supply box connected to said lamp body, said driving power supply unit being housed in said driving power source box.
The illumination device of claim 1, wherein the illumination device comprises a first stage reflector and a second stage reflector, the reflection device is a first stage reflector, and the optical element is a second stage reflector , in the shape of a reflector.
The illumination device according to claim 21, wherein said illumination device further comprises a light homogenizing plate covering said light exit opening of said reflecting means, said reflecting cover being located above said light homogenizing plate.
The illumination device of claim 21, wherein the optical element comprises a face ring located outside the reflector, the face ring being coupled to the lamp body.
The lighting device of claim 1, wherein an optical space is formed between the light entrance opening, the light exit opening, and an inner surface of the reflecting device,

The portion of the light emitted by the light source assembly is refracted into the reflective wall through the inner surface, reflected by the reflective wall into the optical space, and emitted through the light exit port, partially passing through the optical space and ejecting from the light exit port. .