TWI388776B - Reflecting cover and illumination device - Google Patents

Description

Reflector and lighting device

The present invention relates to an optical system, and more particularly to a reflector and an illumination device using the same.

With the development of semiconductor lighting technology, the light efficiency of light emitting diodes (LEDs) has been continuously improved, and it is gradually replacing traditional light sources, especially in the field of street lamps. How to effectively distribute the light energy emitted by the LED is a key issue to be solved in the design of the LED street light optical system. Most of the illumination areas formed by current LED street lamps are circularly symmetric. In order to save energy and achieve greater area illumination, the illumination area can be adjusted to a long strip distribution. The existing improved manner of obtaining the elongated illumination area mainly includes: using a plurality of light sources having different light exiting planes (ie, different light exiting angles); and using an optical lens array to adjust the light emitting directions of the plurality of LEDs respectively. For the former improvement method, it is generally required to provide an adjustment device for each light source, resulting in a large volume of the LED street lamp and a high manufacturing cost, and for the second modification, an optical lens array having a high manufacturing cost must be used. And the light emitted by the LED passes through the optical lens array, causing a certain loss of light.

Therefore, it is necessary to provide a lighting device which is simple in structure and can form a long strip light field.

An illuminating device which is simple in structure and can form a long strip light field will be described below by way of example.

a method for adjusting light emitted by a light emitting diode source to form a reflector of a long strip light field, the length direction of the elongated light field is an X-axis direction, a width direction of the elongated light field is a Y-axis direction, and a direction perpendicular to the XY plane is a Z-axis direction, which includes a first reflecting plate perpendicular to the XZ plane, a second reflecting plate perpendicular to the XZ plane and disposed opposite the first reflecting plate, and a plurality of disposed between the first reflecting plate and the second reflecting plate And the side plates are perpendicular to the XY plane. The first reflecting plate, the second reflecting plate and the plurality of side plates are enclosed to form a barrel structure. The barrel structure has a first opening and a second opening opposite to the first opening, and the light emitting diode light source is disposed at the first opening of the barrel structure. The first reflecting plate and the second reflecting plate are respectively inclined inward in the Z-axis direction. A projection of at least one of the first reflector and the second reflector on the XY plane covers at least a portion of the LED source.

An illumination device for forming an elongated light field, wherein a length direction of the elongated light field is an X-axis direction, a width direction of the elongated light field is a Y-axis direction, and a direction perpendicular to the XY plane is a Z-axis The direction comprises: a substrate, a plurality of light emitting diodes disposed on the substrate, and a reflector module composed of a plurality of reflector units. The plurality of reflector units respectively correspond to the plurality of LEDs, each reflector unit comprising a first reflector perpendicular to the XZ plane, one perpendicular to the XZ plane and disposed opposite the first reflector The second reflecting plate has a plurality of side plates disposed between the first reflecting plate and the second reflecting plate and perpendicular to the XY plane. The first reflecting plate, the second reflecting plate and the plurality of side plates are enclosed to form a barrel structure. The barrel structure has a first opening and a second opening opposite to the first opening, and at least one of the light emitting diode light sources is disposed at the first opening of the barrel structure. The first reflector The second reflecting plate is inclined inwardly in the Z-axis direction. A projection of at least one of the first reflector and the second reflector on the XY plane covers at least a portion of the at least one LED source.

Compared with the prior art, the projection of the first reflector on the XY plane and the projection of the second reflector on the XY plane respectively cover at least part of the LED source, and the first reflector and the second reflector can emit the LED The light emitted by the body light source is reflected to the other direction of the X-axis, thereby increasing the light distribution in the X-axis direction. The plurality of side plates can reflect the light emitted by the light emitting diode source, so that the light emitted by the light emitting diode source is not diverged in the Y-axis direction. Therefore, the light field formed by the light emitted through the second opening is a rectangle. In addition, the reflector is mainly composed of a reflector and a side panel having a reflective function, so that the reflector has a relatively simple structure.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 3, a reflector 10 for adjusting a light emitted by a light emitting diode light source to form an elongated light field is formed by the first embodiment of the present invention. The light field is located on the XY plane shown in FIG. 1, wherein the length direction of the elongated light field is the X-axis direction, the width direction of the elongated light field is the Y-axis direction, and the Z-axis is perpendicular to the XY plane, and the reflection cover 10 It includes a first reflecting plate 11, a second reflecting plate 12, and a plurality of side plates 13.

The first reflecting plate 11 is a curved panel perpendicular to the XZ plane.

The second reflection plate 12 is a curved plate perpendicular to the XZ plane, and the second reflection plate 12 is disposed opposite to the first reflection plate 11. In the present embodiment, the second reflecting plate 12 is bent toward the side of the first reflecting plate 11 in the Z-axis direction shown in FIG. 1, and the first reflecting plate 11 is reflected toward the second direction in the Z-axis direction shown in FIG. The plate 12 is bent on one side.

The plurality of side plates 13 are respectively curved plates perpendicular to the XY plane, and are disposed between the first reflecting plate 11 and the second reflecting plate 12. In this embodiment, the reflector cover 10 includes four side plates 13 disposed oppositely on opposite sides of the first reflector 11 and the second reflector 12, respectively. The first reflecting plate 11, the second reflecting plate 12 and the plurality of side plates 13 are connected end to end to form a barrel structure. It can be understood that the side plates 13 disposed on the same side of the first reflector 11 and the second reflector 12 may be three or more curved panels connected in series; the first reflector 11 and the second reflector 12 are disposed. The side panel 13 on the same side may also be a curved panel having a smooth inner surface.

The reflector 10 can also be said to be a barrel-like structure having a first opening 101 and a second opening 102 opposite to the first opening 101, since the first reflector 11 and the second reflector 12 are respectively along the Z-axis. The direction is bent inward, so that the area of the first opening 101 is larger than the area of the second opening 102. The light emitting diode light source must be disposed at the first opening 101, and the projections 110, 120 of the first reflective plate 11 and the second reflective plate 12 on the XY plane as shown in FIG. 2 cover the light emitting diode light source. It can be understood that one light emitting diode light source can be selectively disposed under the first reflective plate 11 or the second reflective plate 12 such that the projection 110 of the first reflective plate 11 on the XY plane or the second reflective plate 12 is The projection 120 on the XY plane may cover at least a portion of the light emitting diode source. Of course, it may also be below the first reflector 11 and the second reflector 12 The light emitting diode light source is disposed such that the projection 110 of the first reflecting plate 11 on the XY plane and the projection 120 of the second reflecting plate 12 on the XY plane respectively cover at least part of the light emitting diode light source.

The first reflector 11 and the second reflector 12 are perpendicular to the XZ plane and located above the LED source to shield the LED source, that is, the projection 110 and the second of the first reflector 11 on the XY plane. The projections 120 of the reflector 12 on the XY plane respectively cover at least part of the light emitting diode light source, and the inner surface 112 of the first reflector 11 and the inner surface 122 of the second reflector 12 can emit the light emitting diode light source below it The light is reflected to the other direction of the X-axis, thereby increasing the light distribution in the X-axis direction. See Figure 3 for the specific optical path. Since the plurality of side plates 13 are perpendicular to the XY plane, respectively, the inner surfaces 132 of the plurality of side plates 13 can reflect the light emitted by the light emitting diode source, so that the light emitted by the light emitting diode source is not diverged in the Y-axis direction. . Therefore, the light field formed by the light emitted through the second opening 102 is a rectangle. In addition, the first reflector 11 included in the reflector 10, a second reflector 12 and a plurality of side panels 13 may be an integrally formed plastic structure formed by injection molding, and further coated on the first reflector 11 by electroplating. The inner surface 112, the inner surface 122 of the second reflecting plate 12, and the inner surface 132 of the side plate 13 form a metal reflective film, which not only reduces manufacturing costs, but also enables rapid mass production. Of course, the material of the first reflecting plate 11, the second reflecting plate 12 and the plurality of side plates 13 may be a light-transmitting material such as glass or resin.

Referring to FIG. 4 to FIG. 6 , a second embodiment of the present invention provides a reflector 20 for adjusting light emitted by a light-emitting diode source to form an elongated light field. The light field is located in Figure 4 In the XY plane, wherein the length direction of the elongated light field is the X-axis direction, the width direction of the elongated light field is the Y-axis direction, and the Z-axis is perpendicular to the XY plane, the reflector 20 includes a first reflection plate 21, A second reflecting plate 22, a plurality of side plates 23 and a bottom plate 24.

The first reflecting plate 21, the second reflecting plate 22 and the plurality of side plates 23 are all disposed on the bottom plate 24, and the bottom plate 24 is located on the XY plane. The structures of the first reflector 21, the second reflector 22, and the side panel 23 are substantially the same as those of the first reflector 11, the second reflector 12, and the side panel 13 in the first embodiment, and are not described herein again. The first reflecting plate 21, the second reflecting plate 22 and the plurality of side plates 23 are connected end to end to form a barrel structure. The barrel structure has a first opening 201 and a second opening 202 opposite to the first opening 201. The area of the first opening 201 is larger than the area of the second opening 202. The bottom plate 24 is disposed at the first opening 201 and is connected to the plurality of side plates 23. A first through hole 203 is disposed between the bottom plate 24 and the first reflecting plate 21, and a second through hole 204 is disposed between the bottom plate 24 and the second reflecting plate 22. The first through hole 203 and the second through hole 204 are respectively adjacent to the first reflection plate 21 and the second reflection plate 22, that is, the projection 208 of the first reflection plate 21 on the XY plane covers at least a portion of the first through hole 203, and the second reflection A projection 209 of the plate 22 on the XY plane covers at least a portion of the second through hole 204, as specifically seen in FIG.

The first through hole 203 and the second through hole 204 are for receiving the light emitting diode light source, and the inner surface 212 of the first reflecting plate 21 and the inner surface 222 of the second reflecting plate 22 can emit the light emitting diode light source below The light is reflected to the other direction of the X-axis, thereby increasing the light distribution in the X-axis direction. See Figure 6 for the specific optical path. At the same time, the light emitted by the light-emitting diode source is reflected by the inner surface 232 of the plurality of side plates 23 and is not diverged in the Y-axis direction. Therefore, the light field formed by the light emitted through the second opening 202 is a rectangle. The reflector 20 is generally made of an inexpensive material such as plastic or glass, so that it can be mass-produced while reducing costs.

Referring to FIG. 7 to FIG. 9 , a reflector cover 30 is provided for adjusting the light emitted by a light-emitting diode light source to form an elongated light field, and the formed long strip shape is provided. The light field is located on the XY plane shown in FIG. 7, wherein the length direction of the elongated light field is the X-axis direction, the width direction of the elongated light field is the Y-axis direction, and the Z-axis is perpendicular to the XY plane, and the reflection cover 30 The utility model comprises a first reflecting plate 31, a second reflecting plate 32, a plurality of side plates 33 and a bottom plate 34.

The first reflecting plate 31, the second reflecting plate 32 and the plurality of side plates 33 are all disposed on the bottom plate 34, and the bottom plate 34 is located on the XY plane. The first reflecting plate 31 is a flat plate perpendicular to the XZ plane. The second reflecting plate 32 is a flat plate perpendicular to the XZ plane, and the second reflecting plate 32 is disposed opposite to the first reflecting plate 31. In the present embodiment, the second reflecting plate 32 is inclined toward the side of the first reflecting plate 31 in the Z-axis direction shown in FIG. 7, and the first reflecting plate 31 is directed to the second reflecting plate in the Z-axis direction shown in FIG. 32 sides are inclined. It can be understood that the first and second reflecting plates 31 and 32 may have other structures as long as they are respectively inclined inward in the Z-axis direction.

The plurality of side plates 33 are respectively flat plates perpendicular to the XY plane, and are disposed between the first reflection plate 31 and the second reflection plate 32. The first reflecting plate 31, the second reflecting plate 32 and the plurality of side plates 33 are combined to form a barrel structure, but the side plate 33 and the first reflecting plate 31 on the same side of the first reflecting plate 31 and the second reflecting plate 32 or A notch 35 is disposed between the second reflecting plates 32. The notch 35 is used to adjust the light distribution curve of the light emitting diode light source. In this embodiment, The reflector cover 30 includes three side plates 33, two of which are disposed end to end on one side of the first reflection plate 31 and the second reflection plate 32, and the other is disposed on the first reflection plate 31 and the second reflection plate 32. On the other side, the two notches 35 are adjacent to the first reflecting plate 31 and the second reflecting plate 32, respectively. It can be understood that the reflector 30 can include four or more side panels 33, and the number and location of the notches 35 can be designed according to the shape of the light field to be formed.

A first through hole 303 and a second through hole 304 are disposed on the bottom plate 34. The first through hole 303 and the second through hole 304 are respectively adjacent to the first reflection plate 31 and the second reflection plate 32, that is, the projection 308 of the first reflection plate 31 on the XY plane covers at least a portion of the first through hole 303, and the second reflection A projection 309 of the plate 32 on the XY plane covers at least a portion of the second through hole 304, see FIG.

The first through hole 303 and the second through hole 304 are used for accommodating the light emitting diode light source, and the inner surface 312 of the first reflecting plate 31 and the inner surface 322 of the second reflecting plate 32 can emit the light emitting diode light source under the light emitting diode The light is reflected to the other direction of the X-axis, thereby increasing the light distribution in the X-axis direction. See Figure 9 for the specific optical path. At the same time, the light emitted by the light-emitting diode source is reflected by the inner surface 332 of the plurality of side plates 33 and is not diverged in the Y-axis direction. Therefore, the light field formed by the light emitted by the light-emitting diode light source is reflected by the reflection cover 30, and the light beam emitted from the notch 35 forms a special light distribution in the X-axis direction, but does not change the final rectangular shape. Light field distribution. The reflector 30 is generally made of an inexpensive material such as plastic or glass, so that it can be mass-produced while reducing costs.

Referring to FIG. 10 to FIG. 12, a fourth embodiment of the present invention provides a lighting device 40 for forming an elongated light field, the length of the elongated light field. The direction is the X-axis direction, the width direction of the elongated light field is the Y-axis direction, and the direction perpendicular to the XY plane is the Z-axis direction. The illuminating device 40 includes a substrate 41, a plurality of light emitting diodes 42, a reflector module 43, a light transmitting plate 44, and a receiving seat 45.

A plurality of light emitting diodes 42 are disposed on one surface 411 of the substrate 41 in an array arrangement. A plurality of light emitting diodes 42 are electrically connected to the substrate 41, respectively, and the substrate 41 is connectable to an external power source (not shown).

The reflector module 43 includes a substrate 431 and a plurality of reflectors 10 as described in the first embodiment. The plurality of reflectors 10 are disposed on the substrate 431 in an array arrangement. The first reflecting plate 11 and the second reflecting plate 12 of each of the reflectors 10 are disposed on the X-axis, that is, the arrangement directions of the plurality of reflecting covers 10 are identical. Each of the reflectors 10 covers at least one of the light emitting diodes 42 on the substrate 41. In the present embodiment, the projection of the first reflecting plate 11 on the XY plane covers one of the light emitting diodes 42, and the projection of the second reflecting plate 12 on the XY plane also covers one of the light emitting diodes 42.

It can be understood that the number of the LEDs 42 covered by each of the reflectors 10 and the projection of the first reflector 11 or the second reflector 12 on the XY plane to the size of the coverage area of the LED can be determined according to the The shape of the light field to be formed is designed.

The light transmissive plate 44 is disposed on a side of the reflector module 43 opposite to the surface 411 of the substrate 41 to cover the reflector module 43. The light transmissive plate 44 is used to homogenize the light emitted through the reflector module 43 so that the illumination device 40 can form a rectangular light field while having better light uniformity. It can be understood that the light transmissive plate 44 can be a lens array.

The accommodating base 45 is configured to receive the substrate 41 carrying the illuminating diode 42 and the reflector module 43 and the light transmissive plate 44 therein, thereby effectively protecting the components disposed therein and facilitating assembly and disassembly.

The inner surface 112 of the first reflecting plate 11 of each of the reflectors 10 and the inner surface 122 of the second reflecting plate 12 can reflect the light emitted from the LED body 42 below it to the other direction of the X-axis, thereby increasing The light distribution in the X-axis direction. At the same time, the light emitted from the light-emitting diode light source 42 is reflected by the inner surface 132 of the side plate 13 and is not diverged in the Y-axis direction. Therefore, the light field generated by the plurality of light-emitting diodes 42 is reflected by the reflector module 43 and finally formed into a rectangular shape. Here, the light distribution curve of the illumination device 40 is shown in FIG. 11 , and the illumination simulation diagram is shown in FIG. 12 . . As described above, the manufacturing material of each of the reflectors 10 is relatively inexpensive, so that the manufacturing cost of the lighting device 40 is low, and the lighting device 40 can also be mass-produced due to the assembly flexibility of the lighting device 40.

It should be noted that the reflector 20 provided in the second embodiment and the reflector 30 provided in the third embodiment can also be applied to the illumination device 40 instead of the reflector 10, and a rectangular light field can also be obtained.

It is to be understood that those skilled in the art can make various other changes and modifications in accordance with the technical concept of the present invention, and all such changes and modifications are intended to fall within the scope of the invention.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Familiar with this Equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10, 20, 30‧‧ ‧ reflector

11, 21, 31‧‧‧ first reflector

13, 23, 33‧‧‧ side panels

101, 201‧‧‧ first opening

102, 202‧‧‧ second opening

110, 120, 208, 209, 308, 309‧‧‧ projection

Inner surfaces of 112, 122, 132, 212, 222, 232, 312, 322, 332‧‧

12, 22, 32‧‧‧ second reflector

24, 34‧‧‧ bottom plate

203, 303‧‧‧ first through hole

204, 304‧‧‧ second through hole

35‧‧‧ gap

40‧‧‧Lighting device

41, 431‧‧‧ substrate

42‧‧‧Lighting diode

43‧‧‧reflector module

44‧‧‧Translucent plate

45‧‧‧容座

411‧‧‧ surface

1 is a schematic structural view of a reflector provided by a first embodiment of the present invention.

2 is a top plan view of the reflector shown in FIG. 1.

Figure 3 is a cross-sectional view of the reflector of Figure 1 taken along line III-III.

4 is a schematic structural view of a reflector provided by a second embodiment of the present invention.

Figure 5 is a plan view of the reflector shown in Figure 4.

Figure 6 is a cross-sectional view of the reflector shown in Figure 4 taken along line VI-VI.

FIG. 7 is a schematic structural view of a reflector provided by a third embodiment of the present invention.

Figure 8 is a plan view of the reflector shown in Figure 7.

Figure 9 is a cross-sectional view of the reflector shown in Figure 7 taken along line IX-IX.

FIG. 10 is a schematic exploded view of a lighting device according to a fourth embodiment of the present invention.

Figure 11 is a light distribution graph of the lighting device shown in Figure 10.

Fig. 12 is an illuminance analogy diagram of the lighting device shown in Fig. 10.

10‧‧‧reflector

11‧‧‧First reflector

13‧‧‧ side panel

101‧‧‧ first opening

102‧‧‧second opening

112, 122, 132‧‧‧ inner surface

12‧‧‧second reflector

Claims (15)

A reflector for adjusting light emitted by a light-emitting diode light source to form an elongated light field, the length direction of the elongated light field being an X-axis direction, and the width direction of the elongated light field is Y The direction of the axis, the direction perpendicular to the XY plane is the Z-axis direction, and includes: a first reflecting plate perpendicular to the XZ plane; a second reflecting plate perpendicular to the XZ plane and disposed opposite to the first reflecting plate; a side plate disposed between the first reflecting plate and the second reflecting plate, wherein the plurality of side plates are perpendicular to the XY plane, and the first reflecting plate, the second reflecting plate and the plurality of side plates are enclosed to form a barrel structure The barrel structure has a first opening and a second opening opposite to the first opening, the light emitting diode light source is disposed at the first opening of the barrel structure, the first reflecting plate and the first The two reflecting plates are respectively inclined inwardly along the Z-axis direction, and the projection of at least one of the first reflecting plate and the second reflecting plate on the XY plane covers at least part of the LED light source. The reflector of claim 1, wherein the first reflector and the second reflector are curved panels that are bent inward in the Z-axis direction. The reflector of claim 1, wherein the first reflector and the second reflector are flat plates that are inclined inward in the Z-axis direction. The reflector of claim 1, wherein the side panel is a curved panel. The reflector of claim 1, further comprising a bottom plate disposed at the first opening of the barrel structure, the bottom plate being coupled to the plurality of side plates, the bottom plate and the first Between reflectors a first through hole is disposed, a second through hole is disposed between the bottom plate and the second reflective plate, and a projection of the first reflective plate on the XY plane covers at least a portion of the first through hole, and the second reflective plate is The projection on the XY plane covers at least a portion of the second via. The reflector of claim 5, wherein at least one side plate on the same side of the first reflector and the second reflector is disposed between the first reflector or the second reflector gap. An illumination device for forming an elongated light field, wherein a length direction of the elongated light field is an X-axis direction, a width direction of the elongated light field is a Y-axis direction, and a direction perpendicular to the XY plane is a Z-axis The direction includes: a substrate; a plurality of light emitting diodes disposed on the substrate; a reflector module composed of a plurality of reflector units, the plurality of reflector units and the plurality of LEDs respectively Correspondingly, each reflector unit comprises: a first reflector perpendicular to the XZ plane; a second reflector perpendicular to the XZ plane and disposed opposite the first reflector; a plurality of the first reflectors are disposed on the first reflector a side plate between the plate and the second reflecting plate, wherein the plurality of side plates are perpendicular to the XY plane, and the first reflecting plate, the second reflecting plate and the plurality of side plates are enclosed to form a barrel structure, and the barrel structure has a a first opening and a second opening opposite to the first opening, at least one of the light emitting diode light sources is disposed at the first opening of the barrel structure, and the first reflecting plate and the second reflecting plate respectively follow the Z Axis direction inward Obliquely disposed, the first plate and the second reflector plate reflecting at least one of the projection on the XY plane covers at least a portion of the at least one light emitting diode. The lighting device of claim 7, wherein the reflector unit is arranged in an array. The illuminating device of claim 7, further comprising a receiving seat for receiving the substrate and the reflector module. The illuminating device of claim 9, further comprising a light-transmitting plate disposed on the accommodating seat to cover the reflector module, wherein the light-transmitting plate is located in the reflector module The side of the group opposite the plurality of light emitting diodes. The illumination device of claim 7, wherein the first reflector and the second reflector of each reflector unit are curved panels that are bent inward in the Z-axis direction. The illuminating device of claim 7, wherein the first reflecting plate and the second reflecting plate of each of the reflector units are respectively flat plates that are inclined inward in the Z-axis direction. The illuminating device of claim 7, wherein the side plate of each of the reflector units is a curved panel. The illuminating device of claim 7, wherein each of the reflector units further includes a bottom plate disposed at the first opening of the barrel structure, the bottom plate being coupled to the plurality of side plates, a first through hole is disposed between the bottom plate and the first reflecting plate, and a second through hole is disposed between the bottom plate and the second reflecting plate, and the projection of the first reflecting plate on the XY plane covers at least part of the first a through hole, the projection of the second reflecting plate on the XY plane covering at least a portion of the second through hole. The illuminating device of claim 14, wherein the first reflecting plate of each of the reflector units is on the same side of the second reflecting plate A gap is formed between the less side plate and the first reflector or the second reflector.