JP2012063762A - Lens and lamp using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens having a simple form and requiring a low cost, and a decorative lamp capable of adopting a light emitting diode (LED) as a light source by using the lens.SOLUTION: A lens and a lamp using the lens are provided. The lamp includes a lamp shade, a base, the lens, and a light emitting diode light source. The lamp shade is assembled on the base. The lens is disposed on the base and positioned in the lamp shade. The lens has a first surface, a second surface, a third surface, and a forth surface. The second surface surrounds the first surface to form a storage space in a matching manner, and the third surface surrounds the fourth surface and is positioned on the outside of the second surface. The first surface is positioned between the storage space and the fourth surface. The light emitting diode light source is positioned in the storage space in the lens.

Description

  The present invention relates to a lamp, and more particularly to a lens and a lamp using the lens.

  Light emitting diodes (LEDs), which have the advantages of compact capacity and long life, have become light sources that are commonly employed in everyday life.

  In a conventional LED light source application, the LED light source is a directional light source, and the directly illuminated part located in front of the LED light source has a higher illumination level and the illumination level of the part that is not directly illuminated is , Lower than that of the directly illuminated part. Because of the directivity of the LED light source, the LED light source is mainly adopted as a lamp that requires a high illuminance partially, not as a decorative illumination.

  Accordingly, an object of the present invention is to provide a lens that is easily shaped and is low in cost.

  An object of the present invention is to provide a decorative lamp that employs a light emitting diode (LED) as a light source.

  The present invention provides a lens having a first surface, a second surface, a third surface, and a fourth surface. The second surface surrounds the first surface and forms an accommodation space in alignment with the first surface. A third surface, which is a concave surface, surrounds the fourth surface and is located outside the second surface. The first surface is located between the accommodation space and the fourth surface.

  In the embodiment of the lens of the present invention, the first surface and the second surface are convex surfaces, and the third surface and the fourth surface are concave surfaces.

  In an embodiment of the lens of the present invention, the third surface has a refractive part and a total reflection part. The refractive part is relatively close to the first surface and the total reflection part is relatively close to the fourth surface.

  In an embodiment of the lens of the present invention, at least one of the third surface and the fourth surface has a microstructure arranged to further adjust the optical path.

  In an embodiment of the lens of the present invention, the lens further includes a plurality of fixed portions connected to the lower end of the third surface.

  The present invention further provides a lamp including a lamp shade, a base, the lens described above, and an LED light source. The lamp shade is assembled to the base. A lens is placed on the base and located in the lampshade. An LED light source is located in the accommodation space in the lens.

  In an embodiment of the lamp of the present invention, a fixed portion located at the lower end of the third surface of the lens is connected to the base. The lamp further includes a plurality of fasteners penetrating the fixing portion to fix the lens to the base.

  In an embodiment of the lamp of the present invention, the lamp further includes an adhesive layer disposed between the fixed portion and the base.

  In light of the above, the lens of the present invention is simple to make and has a low cost. By applying a lens to the lamp, the optical path of the LED light source can be changed, and the LED light source can also be adopted as a decorative lamp. In other words, the lens of the present invention has a simple structure and is easily manufactured, so that the manufacturing cost is low. Furthermore, by adopting a lens with a directional LED light source, the visible angle range of the LED light source is expanded, and the LED light source is also applied to a decorative lamp, further expanding the application range of the LED light source. It becomes.

It is the schematic which shows the lens from the different viewing angle concerning embodiment of this invention. It is the schematic which shows the lens from the different viewing angle concerning embodiment of this invention. It is sectional drawing which showed the lens in FIG. 1 along the AA line. It is the schematic which shows the lamp | ramp which employ | adopted the lens in FIG. FIG. 6 is a schematic diagram illustrating adjustment of light emitted through a lens by a light emitting diode light source. FIG. 6 is a schematic diagram illustrating adjustment of light emitted through a lens by a light emitting diode light source. FIG. 6 is a schematic diagram illustrating adjustment of light emitted through a lens by a light emitting diode light source. It is explanatory drawing which shows the illumination intensity distribution of the lamp | ramp after normalizing different illumination intensity references | standards (normalizing). It is the schematic which shows the lens which has several fixing | fixed part. It is the schematic which shows the lens concerning another embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
1 and 2 are schematic views showing lenses from different viewing angles according to an embodiment of the present invention. FIG. 3 is a sectional view showing the lens in FIG. 1 along the line AA. 1, 2, and 3, the lens 100 of this embodiment has a first surface 110, a second surface 120, a third surface 130, and a fourth surface 140. The second surface 120 surrounds the first surface 110 and forms the accommodating space S conformally. A third surface 130 surrounds the fourth surface 140 and is located outside the second surface 120. The first surface 110 is located between the accommodation space S and the fourth surface 140.

  Accordingly, the first surface 110 and the second surface 120 of the lens 100 are convex surfaces, and the third surface 130 and the fourth surface 140 are concave surfaces in this embodiment.

  FIG. 4 is a schematic view showing a lamp employing the lens in FIG. In FIGS. 2, 3, and 4, the lens 100 is applied to a decorative lamp 200. The lamp 200 includes a lamp shade 210, a base 220, a lens 100, and a light emitting diode (LED) light source 230. The lamp shade 210 is assembled to the base 220. The lamp shade 210 can have any shape depending on the demand for the decorative lamp 200. The lens 100 is disposed on the base 220 and is located in the lamp shade 210. A light emitting diode (LED) light source 230 is located in the accommodation space S of the lens 100.

  5 to 7 are schematic diagrams illustrating adjustment of light emitted through a lens by a light emitting diode light source, respectively. For better illustration, FIGS. 5-7 show only the light path of the LED light source 230 after being adjusted through the LED light source 230, the lens 100, and the lens 100. In FIG. 5, the light emitted by the LED light source 230 disposed in the accommodation space S of the lens 100 facing the first surface 110 has a narrow visible range because it is limited by the directivity of the LED light source 230. . However, the first surface 110 of the lens 100 is neither a plane nor a slope. The first surface 110 is a surface having a curvature. Light emitted from the LED light source 230 enters the lens 100 through the first surface 110, and light refracted by the curvature of the first surface 110 is visible. Increase range. Further, the light that has entered the lens 100 through the first surface 110 is refracted and emitted through the curved fourth surface 140. As a result, the visible range of the light emitted by the LED light source 230 is further expanded.

  In FIG. 6, light emitted by the LED light source 230 facing the second surface 120 is refracted by the curved second surface 120. Light is emitted out of the lens 100 through the curved third surface 130. In particular, the refracted light from the second surface 120 is emitted from the lower part of the third surface 130.

  In FIG. 7, light having a larger angle and emitted from the LED light source 230 enters the lens 100 through the first surface 110 and is emitted on top of the third surface 130. At this time, total reflection occurs, and the light is reflected and emitted from the fourth surface 140. Accordingly, the easily refracted lower portion of the third surface 130 that is relatively close to the first surface 110 is referred to as a refractive portion, and the upper portion of the easily reflected third surface 130 that is relatively close to the fourth surface 140 is entirely Called the reflection part. Here, the refraction part and the total reflection part are generally separated. Each refractive part and total reflection part used in the lens 100 of the lamp 200 can be changed according to the position of the LED light source 230 arranged in the accommodation space S.

  FIG. 8 is an explanatory diagram showing the illuminance distribution of the lamp after normalizing different illuminance standards. As shown in FIG. 8, the lens 100 is employed in the lamp 200, and the visible angle range of the lamp 200 is about −85 ° to + 85 °. That is, the lamp 200 has a visible angle range of 170 °. In addition, the lamp 200 has a uniform illumination within the visible angle range, and the non-uniform illumination of a conventional decorative lamp using a directional LED light source 230 is adjusted.

  Further, a microstructure (not shown) is formed on at least one of the third surface 130 and the fourth surface. The arrangement of the microstructure facilitates adjustment of the optical path and avoids glare.

  FIG. 9 is a schematic view showing a lens having a plurality of fixed portions. 4 and 9, in order to securely place the lens 100 on the base 220, the lens 100 further includes a fixing portion 150 connected to the lower end of the third surface 130. The lamp 200 further includes a plurality of fasteners (fasteners, not shown) such as screws, and the fasteners are fixed to the base 220 via the fixing portions 150 to fix the lens 100 on the base 220. Each fixing portion 150 has an opening 152, and a fastener is fixed to the base 220 through the opening 152.

  In another embodiment, the fixed portion 150 ′ lacks an opening 152 (as shown in FIG. 10) and the lens 100 ′ is disposed on the base 220 via the fixed portion 150 ′. Here, an adhesive layer is provided between the fixing portion 150 ′ and the base 220 in order to fix the lens 100 ′ on the base 220. This embodiment does not limit the method of securing the securing portion 150 on the base 220. In other embodiments not described, a plurality of latches (not shown) are disposed on the base 220. The lens 100 is secured to the base 220 by screwing the securing portion 150 into the space between the latch and the surface of the base 220.

  In other words, the lens of the present invention has a simple structure and is easily manufactured, so that the manufacturing cost is low. Furthermore, by adopting a lens with a directional LED light source, the visible angle range of the LED light source is expanded, and the LED light source is also applied to a decorative lamp, further expanding the application range of the LED light source. It becomes.

  As described above, the present invention has been disclosed by the embodiments. However, the present invention is not intended to limit the present invention, and within the scope of the technical idea of the present invention, as can be easily understood by those skilled in the art, Appropriate changes and modifications can be made, so that the scope of protection of the patent right must be determined on the basis of the scope of claims and the equivalent area.

  The present invention relates to an LED having directivity applied to a decorative lamp.

100, 100 ′ Lens 110 First surface 120 Second surface 130 Third surface 140 Fourth surface 150, 150 ′ Fixed portion 152 Opening 200 Lamp 210 Lamp shade 220 Base 230 LED (light emitting diode) light source S Accommodating space

Claims (12)

A lens in which a light emitting diode light source is disposed;
Including a first surface, a second surface, a third surface, and a fourth surface;
The second surface surrounds the first surface to form an accommodation space;
The light emitting diode light source is located inside the housing space;
The third surface surrounds the fourth surface and is located outside the second surface;
The first surface is located between the accommodating space and the fourth surface;
The lens, wherein the third surface is a concave surface.   The lens according to claim 1, wherein each of the first surface and the second surface is a convex surface, and the fourth surface is a concave surface.   The third surface has a refractive part and a total reflection part, the refractive part is closer to the first surface than the fourth surface, and the total reflection part is closer to the fourth surface than the first surface. The lens according to claim 1.   The lens according to claim 1, wherein at least one of the third surface and the fourth surface further has a microstructure arranged to adjust an optical path.   The lens according to claim 1, further comprising a plurality of fixed portions connected to a lower end of the third surface. Lampshade,
A base assembled to the lampshade;
And a first surface, a second surface, a third surface, and a fourth surface, the second surface surrounding the first surface. An accommodation space is formed, the third surface surrounds the fourth surface and is located outside the second surface, and the first surface is located between the accommodation space and the fourth surface. And a lens wherein the third surface is a concave surface;
A light-emitting diode light source disposed inside the accommodation space of the lens.   The lamp according to claim 6, wherein the first surface and the second surface are each a convex surface, and the fourth surface is a concave surface.   The third surface has a refractive part and a total reflection part, the refractive part is closer to the first surface than the fourth surface, and the total reflection part is closer to the fourth surface than the first surface. A lamp as claimed in claim 6.   The lamp of claim 6, wherein at least one of the third surface and the fourth surface further has a microstructure arranged to adjust an optical path.   The lamp of claim 6, further comprising a plurality of fixed portions connected to the lower end of the third surface and connected to the base.   The lamp according to claim 10, wherein a plurality of fasteners are provided in correspondence with each of the plurality of fixing portions, and each of the plurality of fasteners penetrates the corresponding fixing portion and fixes the lens on the base. .   The lamp of claim 10, further comprising an adhesive layer disposed between the plurality of fixed portions and the base.

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