TWI554723B - Led lamp and optical lens - Google Patents

Description

LED lamps and optical lenses

The present invention relates to the field of LED lighting technologies, and in particular, to an LED lamp and an optical lens.

In recent years, LED (Light Emitting Diode) lamps have achieved rapid development and are gradually entering the field of general lighting. Compared with traditional incandescent tungsten bulbs and fluorescent lamps, LED lamps have the advantages of small size, energy saving, environmental protection and long service life, so they are known as green lighting sources.

Please refer to FIG. 1 , which is a structural diagram of an optical lens for an LED lamp. As shown in FIG. 1, the optical lens 10 includes a mount 11, a dome structure 13 disposed on the mount 11, and a protruding structure 15 projecting outward from the dome structure 13 in a direction away from the mount 11. The dome structure 13 has a first optical curved surface 131, and the convex structure 15 has a second optical curved surface 151, and a boundary line between the second optical curved surface 151 and the first optical curved surface 131 is a horizontal line and is located outside the dome structure 13. Surface (ie, first optical curved surface 131).

Please refer to FIG. 2, which is a photo simulation result diagram of the optical lens 10 shown in FIG. 1. As can be seen from Fig. 2, there is a distinct dark band in the middle of the resulting light pattern, as indicated by the elliptical dotted frame in Fig. 2, i.e., the partial light uniformity of the optical lens 10 is poor.

Therefore, in view of the deficiencies in the related art described above, the present invention provides an LED lamp and an optical lens to solve the problem of poor local light uniformity of the optical lens.

Specifically, an LED lamp provided by an embodiment of the invention includes: an LED light source and an optical lens covering the LED light source. Wherein the optical lens comprises a dome structure and a protruding structure, the dome structure having an outer surface, the protruding structure protruding from the outer surface of the dome structure and comprising a first oppositely disposed Side and second side. The first side has a first optical surface and a second optical surface, the second side has a third optical surface, and the second optical surface directly contacts the outer surface of the dome structure And being connected between the outer surface of the dome structure and the first optical surface, the boundary line of the second optical surface and the first optical surface is not located outside the dome structure a surface, the third optical surface directly contacting the outer surface of the dome structure.

In an embodiment of the invention, the first side surface is an inner concave surface formed by the first optical surface and the second optical surface.

In one embodiment of the invention, the boundary line between the second optical surface and the first optical surface is a horizontal line above the outer surface of the dome structure.

In an embodiment of the invention, the first optical surface is a planar, curved or free-form surface combination.

In an embodiment of the invention, the second optical surface is a plane and the angle between the second optical surface and the vertical plane is θ, wherein θ ranges from 0 to 60 degrees.

In an embodiment of the invention, the optical lens further includes a mounting seat and the mounting seat is provided with a plurality of mounting holes, and the dome structure is disposed on the mounting seat.

In addition, an optical lens according to an embodiment of the present invention includes a dome structure and a protruding structure, the dome structure having an outer surface, the protruding structure protruding from the outer surface of the dome structure and The first side and the second side are oppositely disposed. The first side has a first optical surface and a second optical surface, the second side has a third optical surface, and the second optical surface directly contacts the outer surface of the dome structure And being connected between the outer surface of the dome structure and the first optical surface, a boundary line of the second optical surface and the first optical surface is located on the outer surface of the dome structure Above the third optical surface directly contacts the outer surface of the dome structure.

In an embodiment of the invention, the first side of the optical lens is an inner concave surface formed by the first optical surface and the second optical surface.

In an embodiment of the invention, the boundary line between the second optical surface and the first optical surface of the optical lens is a horizontal line, and the first optical surface is a planar, curved surface or free-form surface combination.

In an embodiment of the invention, the second optical surface of the optical lens is a plane and the angle between the second optical surface and the vertical plane is θ, wherein θ ranges from 0 to 60 degrees.

As can be seen from the above, the embodiment of the present invention can effectively improve the local light uniformity of the optical lens by introducing a second optical surface between the first optical surface of the optical lens and the outer surface of the dome structure as a transition surface.

The above described objects, features and advantages of the present invention will become more apparent from the aspects of the appended claims.

Referring to FIG. 3 , an optical lens 30 according to an embodiment of the present invention includes a mounting seat 31 , a dome structure 33 , and a protruding structure 35 . A plurality of mounting holes 310 are provided in the mount 31. The dome structure 33 is disposed on the mount 31 and has an outer surface 331 where the dome structure 33 and the mount 31 are of unitary construction. The protruding structure 35 protrudes outwardly from the outer surface 331 of the dome structure 33 and includes a first side surface and a second side surface. Wherein, the first side is composed of the first optical surface 351 and the second optical surface 353 to form an inner concave surface; the second optical surface 353 is directly connected to the outer surface 331 of the dome structure 33 and is connected outside the dome structure 33. The first optical surface 351 is connected to the second optical surface 353 to form a boundary line 352 and the other side is connected to the top surface of the protruding structure 35 (not shown in FIG. 3); The boundary line 352 of the first optical surface 351 and the second optical surface 353 is a horizontal line and is located above the outer surface 331 of the dome structure 33, that is, the boundary line 352 has a non-zero distance from the outer surface 331 of the dome structure 33. Or the boundary line 352 is not located on the outer surface 331 of the dome structure 33. As shown in FIG. 3, the first optical surface 351 and the second optical surface 353 are planar, but the invention is not limited thereto. For example, the first optical surface 351 may also be a curved surface or a free-form surface combination. The second side is the third optical surface 355, and the third optical surface 355 is directly in contact with the outer surface 331 of the dome structure 33. In addition, the third optical surface 355 may be a flat surface, but the invention is not limited thereto.

Referring to FIG. 4 and FIG. 3 together, the angle of the second optical surface 353 with respect to the vertical plane is θ, wherein θ ranges from 0 to 60 degrees; for example, the angle θ is 35 degrees. In addition, as can be seen from FIG. 4, when the LED light source 40 is combined with the optical lens 30 for forming an LED lamp, the LED light source 40 is mounted in the inner accommodating space of the optical lens 30 and the lower surface 311 of the mount 31 serves as a light source. Mounting surface. Typically, the LED light source 40 includes a COB (chip on board) substrate and one or more LED chips fixed on the COB substrate; further, in order to facilitate heat dissipation of the LED lamp, the COB substrate and the heat sink are generally The thermal contact, for example, the COB substrate is directly in contact with the heat sink or thermally connected to the heat sink through the heat conductive adhesive, and then the optical lens 30 is mechanically connected to the heat sink through a mounting hole 310 on the mounting seat 31 by using a holding member such as a screw. .

Please refer to FIG. 5 , which is a diagram of the optical simulation result of the optical lens 30 shown in FIG. 3 . As can be seen from Fig. 5, the intermediate dark band of the resulting light pattern has become inconspicuous, and the portion of the optical dotted lens 30, as indicated by the elliptical dotted frame in Fig. 5, is improved.

Please refer to FIG. 6, which is a comparison diagram of the luminous flux of the optical lens 10 shown in FIG. 1 and the optical lens 30 shown in FIG. In FIG. 6, the thin line is the luminous flux curve of the optical lens 10 shown in FIG. 1, and the thick line is the luminous flux curve of the optical lens 30 shown in FIG. 3. Comparing the two luminous flux curves, it can be found that the corresponding light of the optical lens 30 shown in FIG. The luminous flux at the dark band is significantly increased, making the dark band inconspicuous. In addition, it can also be seen from FIG. 6 that the overall luminous flux on the right side of the vertical axis is significantly smaller than the luminous flux on the left side, that is, the arrangement of the convex structure 35 is such that the optical lens 30 becomes an asymmetric illuminating optical lens.

In summary, the above embodiment of the present invention introduces the second optical surface 353 as a transition surface between the first optical surface 351 of the optical lens 30 and the outer surface of the dome structure 33, which can effectively improve the portion of the optical lens 30. Regional light uniformity. In addition, it can be understood that the optical lens 30 of the above embodiment of the present invention is not limited to being assembled into an LED luminaire in cooperation with an LED light source, and it can also be combined with other light sources. In addition, the arrangement of the mount 31 is optional, mainly for the purpose of increasing the ease of installation of the optical lens 30.

So far, the specific examples and embodiments of the LED lamp and the optical lens of the present invention have been described herein. The description of the above embodiments is only for helping to understand the method and core idea of the present invention; The present invention is not limited by the scope of the present invention, and the scope of the present invention should not be construed as limiting the scope of the present invention. The scope of the attached patent application is subject to change.

10, 30‧‧‧ optical lens
11, 31‧‧‧ Mounting
310‧‧‧Mounting holes
311‧‧‧The lower surface of the mount
13, 33‧‧‧ dome structure
331‧‧‧ outer surface of the dome structure
131‧‧‧First optical surface
15, 35‧‧‧ protruding structure
351‧‧‧First optical surface
151‧‧‧Second optical surface
353‧‧‧Second optical surface
352‧‧‧The boundary between the first optical surface and the second optical surface
355‧‧‧ Third optical surface
40‧‧‧LED light source θ‧‧‧An angle between the second optical surface and the vertical plane

FIG. 1 is a schematic structural view of an optical lens for an LED lamp. Fig. 2 is a view showing a result of optical simulation of the optical lens shown in Fig. 1. FIG. 3 is a schematic structural view of an optical lens according to an embodiment of the present invention. 4 is a cross-sectional view of the optical lens of FIG. 3 taken along the Y-axis direction, and the optical lens and LED light source are combined for assembly into an LED luminaire. Fig. 5 is a view showing a result of optical simulation of the optical lens shown in Fig. 3. Fig. 6 is a view showing a comparison of luminous fluxes of the optical lens shown in Fig. 1 and the optical lens shown in Fig. 3.

30‧‧‧ optical lens

31‧‧‧ Mounting

310‧‧‧Mounting holes

33‧‧‧Dome structure

331‧‧‧ outer surface of the dome structure

35‧‧‧ protruding structure

351‧‧‧First optical surface

353‧‧‧Second optical surface

352‧‧‧The boundary between the first optical surface and the second optical surface

355‧‧‧ Third optical surface

Claims (10)

An LED lamp comprising an LED light source (40) and an optical lens (30) covering the LED light source (40), the optical lens (30) being an asymmetrical light-emitting optical lens and comprising a mounting seat (31) and a dome structure And a protruding structure (35) disposed on the mounting seat (31) and integral with the mounting seat (31), the dome structure (33) Having an outer surface (331) protruding from the outer surface (331) of the dome structure (33) in a direction away from the mount (31) such that An interface of the raised structure (35) and the dome structure (33) is located on a side of the dome structure (33) remote from the mounting seat (31); wherein the protruding structure ( 35) comprising a first side and a second side oppositely disposed, the first side having a first optical surface (351) and a second optical surface (353), the second side having a third optical surface ( 355), the second optical surface (353) is in direct contact with the outer surface (331) and is coupled to the outer surface (331) of the dome structure (33) and the first optical surface ( 351) as a transition surface, the second optics a boundary line (352) between the (353) and the first optical surface (351) is not located on the outer surface (331) of the dome structure (33), the third optical surface (355) is The outer surfaces (331) of the dome structure (33) are directly joined. The LED lamp of claim 1, wherein the first side is an inner concave surface formed by the first optical surface (351) and the second optical surface (353). The LED lamp of claim 2, wherein the boundary line (352) of the second optical surface (353) and the first optical surface (351) is located on the outer surface (331). The level line above. The LED lamp of claim 2, wherein the first optical surface (351) is a planar, curved or free-form surface combination. The LED lamp of claim 2, wherein the second optical surface (353) is a plane and the angle of the second optical surface (353) with respect to a vertical plane is θ, wherein a range of values of θ It is 0~60 degrees. The LED lamp of claim 1, wherein the mounting seat (31) is provided with a plurality of mounting holes (310). An optical lens (30) comprising a mount (31), a dome structure (33) and a protruding structure (35), the dome structure (33) being disposed on the mount (31) and The mounting seat (31) is a unitary structure, and the dome structure (33) has an outer surface (331), and the protruding structure (35) protrudes from the circle in a direction away from the mounting seat (31) The outer surface (331) of the top structure (33) such that an interface of the raised structure (35) and the dome structure (33) is located away from the said dome structure (33) a side of the mounting seat (31); wherein the protruding structure (35) includes opposite first and second sides, the first side having a first optical surface (351) and a second optical a face (353), the second side has a third optical surface (355), the second optical surface (353) is in direct contact with the outer surface (331) and is connected to the dome structure (33) Between the outer surface (331) and the first optical surface (351) as a transition surface, a boundary line (352) between the second optical surface (353) and the first optical surface (351) Located above the outer surface (331) of the dome structure (33), Said outer surface of said third optical surface (355) and the dome (33) (331) in direct contact. The optical lens of claim 7, wherein the first side is an inner concave surface formed by the first optical surface (351) and the second optical surface (353). The optical lens of claim 8, wherein the boundary line (352) of the second optical surface (353) and the first optical surface (351) is a horizontal line, and the first The optical surface (351) is a flat, curved or free-form surface combination. The optical lens of claim 8, wherein the second optical surface (353) is a plane and the angle of the second optical surface (353) with respect to a vertical plane is θ, wherein a range of values of θ It is 0~60 degrees.