TWI392836B - Led lighting unit and street lamp - Google Patents

Abstract

An LED lighting unit and street lamp is disclosed. The LED lighting unit includes an LED component for generating light, and a lens component covered on the LED component for adjusting an emitting direction of the light. The lens component includes a base, a light-penetrating portion and a trench. The light-penetrating portion is protruded out of the base and an outer surface thereof is a single asymmetric curved surface. The trench is disposed in the base and the light-penetrating portion for receiving the LED component. The LED component is disposed away from the middle axis of the light-penetrating portion, and the curved surface close to the LED component has a relative smaller curvature radius, so as to emit the light to a further point.

Description

Light-emitting diode lighting unit and street lamp

The present invention relates to a lighting unit, and more particularly to a lighting diode lighting unit.

In recent years, due to the breakthrough of the light-emitting diode (LED) manufacturing technology, the light-emitting diode and the light-emitting efficiency of the light-emitting diode are greatly improved, and the light-emitting diode has low power consumption, low heat generation and long service life. The long-term advantages, in line with the trend of environmental protection and energy saving, thus making the LEDs gradually replace the traditional incandescent bulbs and become new lighting components, and are widely used in road lighting devices, household lighting devices, automotive lighting devices, handheld lighting devices. , LCD panel backlight, traffic sign indicator, indicator board, or other auxiliary lighting equipment for electronic products.

In the application of road lighting, the role of street lamps is mainly to provide nighttime illumination. However, the traditional street lamps have a huge waste of energy due to the low overall light efficiency. Therefore, it is currently the replacement of the original traditional street lamps into light-emitting diode street lamps. One of the key ways for countries to implement energy conservation and carbon reduction. Since the lighting effect of street lamps affects the night vision of the users, in order to protect the safety of the road users, the governments of various countries also regulate the illumination of the LED street lamps, and it is required that the illumination is sufficient within a certain distance. The range of light projection should cover a rectangular area with a specific aspect ratio.

However, since the illuminating dipole system emits bright light from the front condensing point, the illuminating light has a circular distribution and a small divergence angle, so the light beam generated by the bright light has a small projection range, which is disadvantageous for a large area of illumination, so that the illuminating two The light emitted by the polar streetlights will be concentrated in the vicinity of the streetlights, causing the streetlights to be close to the distance and unable to provide sufficient and uniform illumination of the roads, thus affecting the safety of passers-by.

Therefore, how to expand the range of light beam emitted by the LED street lamp, to provide uniform illumination of the LED street lamp, and to meet the illumination standard of the street lamp, has been an effort to develop and improve the direction of the people in the field.

The main purpose of the present invention is to provide a light-emitting diode lighting unit and a light-emitting diode street lamp composed of the light-emitting diode lighting unit, which can compensate the light illumination at the distal end of the light pole, and effectively improve the street light to the road surface illumination. The brightness and uniformity improve the safety of passers-by.

In order to achieve the above object, a generalized embodiment of the present invention provides a light-emitting diode illumination unit including a light-emitting diode element for generating a light, and a lens element disposed on the light-emitting diode The body element is used to adjust the divergence direction of the light. The lens element comprises a substrate, a light transmitting portion and a receiving groove, wherein the light transmitting portion protrudes from the substrate and the outer surface thereof is an asymmetric single curved surface, and the receiving groove is disposed on the substrate and the light transmission In the part, the light emitting diode element is accommodated. The light emitting diode element is disposed away from the axis of the light transmitting portion, and the curved surface has a relatively small radius of curvature on a side close to the light emitting diode element, so that the light is diverged to a distant place.

Another broad aspect of the present invention provides a light-emitting diode street lamp comprising a light pole, a lamp holder and at least one light-emitting diode lighting unit disposed on the lamp holder. The LED illumination unit includes a light emitting diode component for generating a light, and a lens component is disposed on the LED component for adjusting a diverging direction of the light. The lens element comprises a substrate, a light transmitting portion and a receiving groove, wherein the light transmitting portion protrudes from the substrate and the outer surface thereof is an asymmetric single curved surface, and the receiving groove is disposed on the substrate and the light transmission In the part, the light emitting diode element is accommodated. The light emitting diode element is disposed away from an axis of the light transmitting portion, and the curved surface has a relatively small radius of curvature on a side close to the light emitting diode element, so that the light is diverged to the distal end of the light pole .

Some exemplary embodiments embodying the features and advantages of the present invention are described in detail in the following description. It is to be understood that the present invention is capable of various modifications in the various aspects of the present invention, and the description and illustration are in the nature of

The present invention provides a light-emitting diode lighting unit, which is mainly applied to road lighting, such as street lamps, but is not limited thereto. Please refer to the first figure, which is a schematic diagram of a light-emitting diode street lamp according to a preferred embodiment of the present invention. As shown in the figure, the light-emitting diode street lamp of the present invention comprises a light pole 10, a lamp holder 20 and a light-emitting diode lighting unit 30, wherein the lower end of the light pole 10 is fixed on both sides of the road, and the upper end extends to A predetermined height and can be bent a predetermined angle toward the center of the road surface. The lamp holder 20 is disposed on the upper end of the lamp post 10, and the LED device 30 is disposed on the lamp holder 20, and includes a light emitting diode element 31 and a lens element 32. The polar body element 31 is configured to generate a light, and the lens element 32 is disposed on the light emitting diode element 31 for adjusting the diverging direction of the light.

In the first figure, the lamp holder 20 is exemplified by providing a light-emitting diode illumination unit 30. However, the number of the light-emitting diode illumination units 30 disposed on the socket 20 is not limited to one. And preferably comprising a plurality of light emitting diode lighting units 30 arranged in an array to improve the illumination of the street light.

Please refer to the second to fourth figures, wherein the second figure is a perspective view of the illumination diode unit of the present invention, the third picture is the A-A cross-sectional view of the second figure, and the fourth picture is the B-B cross-sectional view of the second figure. As shown in the figure, the LED component 31 mainly includes a light-emitting diode 311 and a lens 312. The structure of the LED component 31 and the matching circuit design are not limited, and may be different according to different needs. Adjustments, and such designs can be achieved using conventional techniques, and thus will not be described again.

The lens element 32 mainly includes a substrate 321 , a light transmitting portion 322 and a receiving groove 323 . The substrate 321 is substantially rectangular and can be fixed on the lamp holder 20 . The light transmitting portion 322 protrudes from the lens portion 322 . The substrate 321 and the outer surface thereof are an asymmetrical single curved surface 3220. The design curvature of the curved surface 3220 can be an elliptic curve or other irregular curve. The asymmetric design of the curved surface 3220 causes the transparent portion 322 to be a non- The accommodating groove 323 is disposed in the substrate 321 and the light transmitting portion 322 for accommodating the light emitting diode element 31.

According to a preferred embodiment of the present invention, the light emitting diode element 31 is disposed away from the axis M of the light transmitting portion 322, and the curved surface 3220 has a relatively small curvature on a side close to the light emitting diode element 31. radius. As shown in the third figure, the light-emitting diode element 31 is disposed on the right side of the central axis M away from the axis M of the light transmitting portion 322. Similarly, the curved surface 3220 is also corresponding to the light-emitting diode element 31. The right side of the setting has a relatively small radius of curvature, and it can be seen from the figure that the convex point T of the curved surface 3220 is correspondingly formed on the right side, in other words, the convex portion of the transparent portion 322 is formed corresponding to the light emitting diode The same side of the position where the body member 31 is disposed.

In one embodiment, the light transmissive portion 322 has a substantially rectangular cross section, and the curved surface 3220 has the aforementioned curvature change in the long axis direction of the rectangle. The light emitting diode element 31 is also in the long axis direction of the rectangle. Set to off-axis. With this rectangular design, the light-emitting diode lighting unit of the present invention can meet the lighting projection range to cover the street light illumination specification of a rectangular area with a specific aspect ratio.

On the other hand, the accommodating groove 323 is disposed on the side of the substrate 321 and the light transmitting portion 322, so that the light emitting diode element 31 received in the accommodating groove 323 can be offset from the light transmitting portion. 322 is set in the middle axis M. In addition, as shown in the fourth figure, the top surface 3230 of the accommodating groove 323 is an upwardly protruding circular arc surface. In addition to assisting in adjusting the diverging direction of the light, the thickness of the lens element 32 can be reduced to make the lens element. The volume of 32 is reduced. For example, the length of the substrate 321 of the lens element 32 is about 20 mm, and the height of the entire lens element 32 is about 7.5 mm. Of course, the foregoing dimensions can be adjusted as needed without limitation.

In one embodiment, the accommodating groove 323 has a substantially rectangular cross section, and the major axis direction thereof coincides with the long axis direction of the light transmitting portion 322, but is not limited thereto.

Referring to the first figure, the light-emitting diode unit 30 of the present invention has an asymmetric structure, wherein the light-emitting diode element 31 is disposed away from the axis M of the light-transmitting portion 322 of the lens element 32, and is transparent. The curved surface 3220 of the light portion 322 has a relatively small radius of curvature on a side close to the light emitting diode element 31, so that the light emitted from the light emitting diode element 31 penetrates the light transmitting portion 322 through secondary refraction. It can be diverged to the road surface at the far end of the pole 10 (as shown in the light trace of the first figure), which not only promotes the improvement of the light energy of the effective area (the road surface to be irradiated), but also compensates the far end of the pole 10 The illuminance of the light, thereby improving the uniformity of illumination, to avoid the safety problem of the road caused by the lack of sufficient illumination due to the distance from the pole 10 in the center of the road. Therefore, the asymmetric structure design of the light-emitting diode lighting unit 30 of the present invention can effectively improve the brightness and uniformity of the street lighting to the road surface, thereby improving the safety of the passers-by.

In one embodiment, the lens element 32 is integrally formed and made of a highly transparent material such as, but not limited to, a plastic material.

Please refer to the fifth figure, which is a schematic diagram of the modular design of the lens element. Since the lens element 32 of the present invention has a planar design with a flat convex shape, the plurality of lens elements 32 can be directly opened and fabricated in an array arrangement, wherein the substrate 321 of each lens element 32 is connected, and the light transmitting portion 322 is connected. They protrude above the substrate 321, respectively, so that not only the process can be accelerated, but also the manufacturing cost can be reduced. Of course, the number and arrangement of the lens elements that are modularly manufactured can be changed according to requirements, and are not limited to the embodiment shown in FIG. 5, and can be directly designed according to the type installed on the lamp holder. The lens element group is fabricated directly on the lamp holder together with the light emitting diode element.

In summary, the present invention mainly provides a light-emitting diode lighting unit and a light-emitting diode street lamp composed of the light-emitting diode lighting unit, wherein the light-emitting diode component of the light-emitting diode lighting unit is biased The shaft is disposed, the lens element has a single asymmetric curved surface, and the curved surface has a relatively small radius of curvature near one side of the light emitting diode element, so that the light emitted from the light emitting diode element acts on the light through the lens element The distal end of the pole is deflected to compensate for the illuminance of the light at the far end of the pole, which effectively improves the brightness and uniformity of the streetlight to the road lighting, thereby improving the safety of passers-by. Therefore, the light-emitting diode lighting unit of the present invention can improve the lack of conventional technology and enhance the lighting effect, so it is of great industrial value and conforms to various patent requirements, and is submitted according to law.

This case has been modified by people who are familiar with the technology, but it is not intended to be protected by the scope of the patent application.

10. . . Light pole

20. . . Lamp holder

30. . . LED lighting unit

31. . . Light-emitting diode component

311. . . Light-emitting diode

312. . . lens

32. . . Lens element

321. . . Substrate

322. . . Translucent part

3220. . . Surface

323. . . Locating slot

3230. . . Top surface

M. . . Axis in the light transmission part

T. . . Surface bump

First: It is a schematic diagram of a light-emitting diode street lamp of the preferred embodiment of the present invention.

The second picture is a three-dimensional diagram of the illumination unit of the present invention.

Third figure: It is a cross-sectional view of A-A of the second figure.

Figure 4: This is a B-B cross-sectional view of the second figure.

Figure 5: It is a schematic diagram of the modular design of the lens elements.

10. . . Light pole

20. . . Lamp holder

30. . . LED lighting unit

31. . . Light-emitting diode component

32. . . Lens element

Claims (20)

A light-emitting diode lighting unit comprising: a light-emitting diode element for generating a light; and a lens element disposed on the light-emitting diode element for adjusting a diverging direction of the light, The lens element comprises: a substrate; a light transmissive portion protruding from the substrate and having an outer surface that is an asymmetrical single curved surface; and a receiving groove disposed in the substrate and the light transmissive portion for receiving The light emitting diode element is disposed, wherein the light emitting diode element is disposed away from an axis of the light transmitting portion, and the curved surface has a relatively small radius of curvature near a side of the light emitting diode element, Let the light scatter to a distance. The light-emitting diode lighting unit of claim 1, wherein the light-emitting diode element comprises a light-emitting diode and a lens. The illuminating diode lighting unit of claim 1, wherein the substrate is substantially rectangular. The illuminating diode lighting unit of claim 1, wherein the design curvature of the curved surface is an elliptic curve or other irregular curve. The illuminating diode lighting unit of claim 1, wherein the curved surface of the curved surface is formed on a side of the light emitting diode element. The light-emitting diode lighting unit of claim 1, wherein the light-transmissive portion has a substantially rectangular cross section, and the curved surface has a curvature change in a longitudinal direction of the rectangle. The illuminating diode lighting unit of claim 6, wherein the illuminating diode element is disposed off-axis in a longitudinal direction of the light transmitting portion. The illuminating diode lighting unit of claim 1, wherein the accommodating groove is disposed on a side of the substrate and the light transmitting portion. The illuminating diode lighting unit of claim 1, wherein the top surface of the accommodating groove is an arc surface that protrudes upward. A light-emitting diode street lamp includes a light pole, a lamp holder and at least one light-emitting diode lighting unit disposed on the lamp socket, the light-emitting diode lighting unit comprising: a light-emitting diode component for Generating a light beam; and a lens element is disposed on the light emitting diode element for adjusting a direction of divergence of the light, the lens element comprising: a substrate; a light transmitting portion protruding from the substrate and The outer surface is an asymmetric single curved surface; and a receiving groove is disposed in the substrate and the transparent portion for receiving the light emitting diode element; wherein the light emitting diode component is offset from the light emitting diode component The light transmitting portion is disposed in an axial direction, and the curved surface has a relatively small radius of curvature on a side close to the light emitting diode element, so that the light is diverged to the distal end of the light pole. The LED street lamp of claim 10, wherein the lamp holder is disposed at an upper end of the lamp post. The light-emitting diode street lamp of claim 11, wherein the upper end of the light pole is bent toward a center of the road surface by a predetermined angle. The light-emitting diode street lamp of claim 10, wherein the light-emitting diode element comprises a light-emitting diode and a lens. The illuminating diode street lamp of claim 10, wherein the substrate is substantially rectangular. The illuminating diode street lamp of claim 10, wherein the design curvature of the curved surface is an elliptic curve or other irregular curve. The light-emitting diode street lamp of claim 10, wherein the convex surface of the curved surface is formed on a side close to the light-emitting diode element. The light-emitting diode street lamp of claim 10, wherein the light-transmissive portion has a substantially rectangular cross section, and the curved surface has a curvature change in a longitudinal direction of the rectangle. The illuminating diode street lamp of claim 17, wherein the illuminating diode element is disposed off-axis in a longitudinal direction of the light transmitting portion. The illuminating diode street lamp of claim 10, wherein the accommodating groove is disposed on a side of the substrate and the light transmitting portion. The illuminating diode street lamp of claim 10, wherein the top surface of the accommodating groove is an arc surface that protrudes upward.