TWI393836B - Illumination device and light-emitting diode lamp thereof - Google Patents

Description

Lighting device and its LED lamp

The invention relates to a lighting device, in particular to a lighting device using a light-emitting diode lamp.

As an emerging light source, the light-emitting diode has been widely used in various fields due to its high luminous efficiency, small size, light weight, environmental protection, etc., and has a tendency to replace the conventional light source.

However, the light-emitting diode is a directional light source, and the light source opening angle is smaller than a conventional light source such as a sodium lamp. For a large area of an object to be illuminated, such as a kanban, the area far from the light-emitting diode is difficult to be illuminated (illuminance) It is inversely proportional to the square of the distance), making it difficult to meet the high uniformity of lighting needs.

In view of the above, it is necessary to provide a lighting device and a light-emitting diode lamp thereof which can improve the uniformity of illumination.

A lighting device for illuminating an irradiated object having a large area, the irradiated object having an illuminating surface, the illuminating device comprising a illuminating diode lamp, wherein the illuminating diode illuminator is used for illuminating the illuminating surface The light-emitting diode lamp includes a support rod and a first light-emitting diode module and a second light-emitting diode module connected to the support rod, and the light generated by the first light-emitting diode module Projecting on the first area of the illumination surface close to the support rod, the light generated by the second LED module is projected on the second area of the illumination surface away from the support rod, and the object to be irradiated is in the first The illuminance of the light on the two regions is uniform.

A light-emitting diode lamp for illuminating an illuminated object having a large area, the light-emitting diode lamp comprising a support rod and a first light-emitting diode module and a second light-emitting diode connected to the support rod In the polar body module, the light generated by the first light emitting diode module is projected on the first region of the irradiated object near the support rod, and the light generated by the second light emitting diode module is projected on the irradiated object. On the second area away from the support rod, the illuminance of the illuminated object on the first and second areas is uniform.

In the above illuminating device and the illuminating diode lamp, the two different first and second illuminating diode modules are matched with each other, so that the first region projected on the kanban near the support rod and away from the support rod The illuminance of the light on the second area is uniform, which is advantageous for improving the uniformity of the light projected on the kanban and improving the illumination quality of the illuminating device.

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

1 shows a lighting device in accordance with a preferred embodiment of the present invention for illuminating an object to be illuminated. The illumination device includes a plurality of light emitting diode lamps 20.

In this embodiment, the object to be irradiated is a kanban 10, such as a kanban, a billboard, etc., the kanban 10 has an illuminating surface 11 having a large area, and the area in this embodiment is 29 m x 8 m. .

The illuminating diode lamps 20 are mounted on the kanban 10 for illuminating the illuminating surface 11 of the kanban 10. In this embodiment, the LEDs 20 are divided into upper and lower rows, which are respectively located on the top side and the bottom side of the kanban 10. Of course, the LEDs 20 can also be arranged in only one row, and Located at a distance above or below the top side of the kanban 10. The photodiode lamps 20 in each row are equally spaced apart from each other by a distance of 1.5 to 2.5 m, such as 1.8 m, 2.2 m, etc., which is 2.0 m in this embodiment.

Referring to FIG. 2 and FIG. 3 , each light-emitting diode lamp 20 includes a support rod 21 , a fixing frame 22 connected to the support rod 21 , a light source driving 23 disposed on the fixing frame 22 , and The first light emitting diode module 24 and the second light emitting diode module 25 are coupled to the mounting frame 22 .

The support rod 21 is a columnar metal rod body, one end of which is fixed to the kanban 10, and the fixing frame 22 is fixed to the other end of the support rod 21. The support rod 21 is perpendicular to the kanban 10 and has a length of 1 to 3 m, such as 1.5 m, 2.5 m, etc., which is 1.8 m in this embodiment. The fixing frame 22 includes a first fixing plate 221 and a second fixing plate 222 integrally formed with the first fixing plate 221. The first fixing plate 221 is away from the supporting rod 21, and the second fixing plate 222 is adjacent to the supporting plate. Rod 21. The first and second fixing plates 221 and 222 are each in the form of a sheet, and each includes a substrate 2211 and 2221, and two side plates 2212 and 2222 extending perpendicularly outward from opposite sides of the substrate 2211 and 2221, respectively. An obtuse angle is formed between the substrates 2211, 2221 of the second fixing plates 221, 222. The substrate 2211 of the first fixing plate 221 is provided with a plurality of circular through holes 2213. The substrate 2221 of the second fixing plate 222 is provided with a square opening 2223. The through holes 2213 and 2223 are beneficial to the first The second LED modules 24 and 25 dissipate heat and facilitate the passage of wires (not shown) for connecting the light source driving 23 and the first and second LED modules 24 and 25.

The light source driving 23 is for driving the first and second LED modules 24, 25 to generate light that illuminates the illumination surface 11 of the kanban 10. The light source The driving 23 is fixed on the substrate 2211 of the first fixing plate 221 and located on a side of the substrate 2211 facing away from the side plate 2212.

The first LED module 24 is fixed to the substrate 2211 of the first fixing plate 221 and is received between the substrate 2211 and the side plate 2212. The second LED module 25 is fixed on the substrate 2221 of the second fixing plate 222 and is received between the substrate 2221 and the side plate 2222. The second LED module 25 is closer to the support rod 21 than the first LED module 24 . The first and second LED modules 24 and 25 are similar, and each includes a lamp cover 241 and 251, a circuit board 242 and 252, and a plurality of light-emitting diodes 243 electrically connected to the circuit boards 242 and 252. 253, and a lens 244, 254 disposed on each of the light-emitting diodes 243, 253.

The lampshades 241 and 251 include a bottom cover 2411 and 2511 and a transparent front cover 2412 and 2512 coupled to the bottom covers 2411 and 2511. The bottom covers 2411 and 2511 accommodate the circuit boards 242 and 252 and the light emitting diodes. 243 and 253 and lenses 244 and 254 are disposed therein, and the front covers 2412 and 2512 are disposed in front of the light-emitting diodes 243 and 253 and the lenses 244 and 254. A heat dissipating body (not shown) thermally connected to the light-emitting diodes 243 and 253 may be disposed on the bottom covers 2411 and 2511 to dissipate heat from the light-emitting diodes 243 and 253. The light-emitting diodes 243 and 253 are respectively mounted on the mounting planes 2431 and 2531. In the embodiment, the LEDs 243 and 253 are respectively mounted on the circuit boards 242 and 252. The mounting surface of the light-emitting diodes 243 and 253 is the mounting planes 2431 and 2531 of the light-emitting diodes 243 and 253. The mounting planes 2431 and 2531 are parallel to the substrates 2211 and 2221 of the first and second fixing plates 221 and 222. .

The mounting planes 2431, 2531 of the LEDs 243, 253 are The irradiation surface 11 of the kanban 10 is obliquely disposed. The mounting plane 2431 of the LED 243 forms an angle α with the illumination surface 11 of the kanban 10, and the angle α ranges from 0 to 90 degrees, preferably 15 to 41.5 degrees, such as 22 degrees, 30 degrees, and 40 degrees. Etc., in this embodiment, it is 35 degrees. The mounting plane 2531 of the LED 253 forms an angle β with the illumination surface 11 of the kanban 10, and the angle β is greater than the angle α, and the angle β ranges from 0 to 90 degrees, preferably 65 to 85 degrees, such as 70. Degree, 78 degrees, etc., in this embodiment is 82 degrees. The mounting plane 2431 forms an obtuse angle with the mounting plane 2531. The first and second LED modules 24 and 25 are irradiated with different angles α and β of the illuminating surface 11 of the kanban 10 to illuminate different regions of the illuminating surface 11 of the kanban 10 . Referring to FIG. 1 again, the light generated by the first LED module 24 is projected on the first area I of the illumination surface 11 of the kanban 10, that is, the area near the support rod 21, and the second illumination 2 The light generated by the polar body module 25 is projected on the second region II of the illumination surface 11 of the kanban 10, that is, the region away from the support rod 21, and the area of the first region I is larger than the area of the second region II. In the present embodiment, the second area II is a position near the center of the illumination surface 11 of the kanban 10, and the first area I is a position where the illumination surface 11 of the kanban 10 is located at the middle and lower parts.

The first and second LED modules 24 and 25 are combined with the lenses 244 and 254 by the LEDs 243 and 253 to generate different shapes of light fields, and the first LED module is formed. The intensity of light generated by group 24 is less than that produced by second light emitting diode module 25. In this embodiment, the opening angle of the light generated by the first LED module 24 is greater than the angle of the light generated by the second LED module 25, that is, the second LED module 25 The generated light is more light than the light generated by the first LED module 24 Concentration, as shown in Figure 4 and Figure 5. The light generated by the first LED module 24 can not be projected over a long distance but has a more uniform distribution and a large projection range, and the light generated by the second LED module 25 cannot project a large range. A certain distance can still be maintained by projecting a long distance. Since the illuminance is inversely proportional to the square of the distance, the illuminance of the light on the first region I of the kanban 10 near the support rod 21 and the illuminance on the second region II away from the support rod 21 are relatively uniform, that is, basic Similarly, as shown in FIG. 6, it is advantageous to improve the uniformity of light projected on the kanban 10 having a large area, and to improve the illumination quality of the illuminating device.

Of course, the number of the first and second LED modules 24 and 25 is not limited, and may be appropriately changed according to the area of the illumination surface 11 to be irradiated, such as the first and second LED modules. The number of 24 and 25 is two.

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. Equivalent modifications or variations made by persons 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‧‧‧Looking

11‧‧‧ illuminated surface

20‧‧‧Lighting diode lamps

21‧‧‧Support rod

22‧‧‧ Fixing frame

221‧‧‧First fixed plate

222‧‧‧Second fixed plate

2211, 2221‧‧‧ substrate

2212, 2222‧‧‧ side panels

2213‧‧‧through hole

2223‧‧‧ openings

23‧‧‧Light source drive

24‧‧‧First LED Module

25‧‧‧Second light-emitting diode module

241, 251‧‧‧ lampshade

2411, 2511‧‧‧ bottom cover

2412, 2512‧‧‧ front cover

242, 252‧‧‧ boards

243, 253‧‧ ‧Lighting diodes

2431, 2531‧‧‧ installation plane

244, 254‧‧ lens

α, β‧‧‧ angle

I‧‧‧First area

II‧‧‧Second area

1 is a schematic perspective view of a lighting device according to a preferred embodiment of the present invention.

2 is an assembled, isometric view of a light-emitting diode lamp in the lighting device of FIG. 1.

3 is an exploded perspective view of the light-emitting diode lamp of FIG. 2.

4 is an isometric distribution diagram of a first LED module in the LED body of FIG. 2 after a soft body test.

FIG. 5 is an isometric distribution diagram of a second LED module in the LED body of FIG. 2 after a soft body test.

FIG. 6 is an isometric distribution diagram of the light-emitting diode lamp of FIG. 2 formed by a software test.

21‧‧‧Support rod

22‧‧‧ Fixing frame

221‧‧‧First fixed plate

222‧‧‧Second fixed plate

2211, 2221‧‧‧ substrate

2212, 2222‧‧‧ side panels

2213‧‧‧through hole

2223‧‧‧ openings

23‧‧‧Light source drive

24‧‧‧First LED Module

25‧‧‧Second light-emitting diode module

241, 251‧‧‧ lampshade

2411, 2511‧‧‧ bottom cover

2412, 2512‧‧‧ front cover

242, 252‧‧‧ boards

243, 253‧‧ ‧Lighting diodes

2431, 2531‧‧‧ installation plane

244, 254‧‧ lens

Claims (10)

A lighting device for illuminating an irradiated object having a large area, the irradiated object having an illuminating surface, the illuminating device comprising a illuminating diode lamp, wherein the illuminating diode illuminator is used for illuminating the illuminating surface The improvement is that the light-emitting diode lamp comprises a support rod and a first light-emitting diode module and a second light-emitting diode module connected to the support rod, and the first and second light-emitting diodes The body module and the illuminating surface form different angles, and the light generated by the first illuminating diode module is projected on the first area of the illuminating surface adjacent to the support rod, and the light generated by the second illuminating diode module Projected on the second area of the illumination surface away from the support rod, the illuminance of the illuminated object on the first and second areas is uniform. The illuminating device of claim 1, wherein the first and second illuminating diode modules each include a circuit board, a light emitting diode disposed on the circuit board, and the light emitting diode. The first and second LED modules are configured to produce different shapes of light fields by different combinations of the LEDs and the lenses. The illuminating device of claim 2, wherein the light emitting diodes of the first and second illuminating diode modules each have a mounting plane, and the mounting planes form an angle with the illuminating surface. The angle between the mounting plane of the LED of the second LED module and the illumination surface is greater than the mounting plane of the LED of the first LED module and the illumination surface. The angle formed. The illuminating device according to any one of claims 1 to 3, wherein the second illuminating diode module is closer to the support rod than the first illuminating diode module. The illuminating device of any one of claims 1 to 3, wherein the illuminating diode lamp further comprises a fixing frame connecting the first and second illuminating diode modules to the supporting rod. The first and second fixing plates each include a substrate, and the first and second LED modules are respectively fixed to the first The second fixed plate is on the substrate. An illuminating diode lamp for illuminating an illuminating object having a large area, wherein the illuminating diode lamp comprises a supporting rod and a first illuminating diode module connected to the supporting rod and a second LED module, the first and second LED modules form different angles with the illumination surface, and the light generated by the first LED module is projected on the irradiated object near the support rod On the first area, the light generated by the second LED module is projected on the second region of the object to be irradiated away from the support rod, and the light of the object on the first and second regions is illuminated. Uniform illumination. The light-emitting diode lamp of claim 6, wherein the first and second light-emitting diode modules each comprise a circuit board, a light-emitting diode disposed on the circuit board, and a light-emitting diode In the lens on the polar body, the first and second LED modules generate different light fields by different combinations of the LED and the lens. The illuminating diode lamp of claim 7, wherein the illuminating diodes of the first and second illuminating diode modules each have a mounting plane, and the mounting plane is illuminated with the illuminating diode Forming an angle, the angle between the mounting plane of the LED of the second LED module and the object to be irradiated is greater than the mounting plane of the LED of the first LED module An angle formed with the object to be irradiated. A light-emitting diode lamp according to any one of claims 6 to 8 The second light emitting diode module is closer to the support bar than the first light emitting diode module. The illuminating diode lamp according to any one of claims 6 to 8, wherein the illuminating diode lamp further comprises connecting the first and second illuminating diode modules to the support rod The fixing frame includes a first fixing plate and a second fixing plate, wherein the first and second fixing plates each comprise a substrate, and the first and second LED modules are respectively fixed to the On the substrate of the first and second fixing plates.