CN102374482B - Lens and lamp using same - Google Patents

Abstract

A lens and a lamp using the lens. The lamp includes a lampshade, a base, a lens and a light-emitting diode light source. The base and the lampshade are assembled together, and the lens is arranged on the base and located in the lampshade. The lens has an accommodating part, a first light emitting surface and a second light emitting surface, wherein the first light emitting surface is located above the accommodating part, and the second light emitting surface surrounds the first light emitting surface and is located outside the accommodating part, and the third light emitting surface is located above the accommodating part. The first light-emitting surface and the second light-emitting surface are concave surfaces. The light-emitting diode light source is arranged in the receiving part of the lens. Based on the above, the lens of the present invention has the advantages of simple shape and improved viewing angle. When this lens is used in a lamp, the light path of the light-emitting diode light source can be changed, so that the light-emitting diode light source that is a directional light source can also Can be used in decorative lighting fixtures.

Description

Lens and lamps using the lens

technical field

The invention relates to a lamp, and in particular to a lens and a lamp using the lens.

Background technique

In daily life, due to the advantages of small size and long service life of light emitting diode (Light Emitting Diode, LED) light source, the application of light emitting diode as light source has become more and more common.

It is worth mentioning that in the application of the existing light-emitting diode light source, since the light-emitting diode light source is a directional light source, the direct light area in front of the light-emitting diode light source usually has a higher The brightness of the non-direct light area is lower than the brightness of the direct light area. Due to the directivity characteristics of light-emitting diode light sources, light-emitting diode light sources are mostly used in lamps that require high brightness locally. When applied to decorative lighting fixtures, the brightness is uneven and the viewing angle range is relatively small. minor defects.

Contents of the invention

The invention provides a lens with a simple shape and can increase the viewing angle range of a directional light source.

The invention provides a decorative lamp which uses a light emitting diode as a light source and has a larger viewing angle range.

The invention provides a lens, and a light-emitting diode light source is suitable for disposing in the lens. The lens has an accommodating portion, a first light-emitting surface and a second light-emitting surface, wherein the first light-emitting surface is located above the accommodating portion, and the second light-emitting surface surrounds the first light-emitting surface and is located outside the accommodating portion, and The first light-emitting surface and the second light-emitting surface are concave.

In an embodiment of the lens of the present invention, the aforesaid accommodating portion has a top incident light surface and a side light incident surface, the top light incident surface is located above the light-emitting diode light source, and the side light incident surface surrounds the top light incident surface. surface, and the light-emitting diode light source is located in the side incident light surface.

In an embodiment of the lens of the present invention, the above-mentioned first light-emitting surface has a first sub-light-emitting surface and a second sub-light-emitting surface, the first sub-light-emitting surface is a plane, and is parallel to the top light-emitting surface, and The second sub-light-emitting surface surrounds the first sub-light-emitting surface and is connected with the second light-emitting surface.

In an embodiment of the lens of the present invention, the above-mentioned second sub-light-emitting surface is an inclined surface or a curved surface.

In an embodiment of the lens of the present invention, the cross-section of the above-mentioned first light-emitting surface is funnel-shaped.

In an embodiment of the lens of the present invention, the diameter of the above-mentioned first sub-light-emitting surface is 0.5 mm.

In an embodiment of the lens of the present invention, the above-mentioned second light-emitting surface has a third sub-light-emitting surface and a fourth sub-light-emitting surface, the third sub-light-emitting surface is connected to the first light-emitting surface, and the fourth sub-light-emitting surface is connected to the first light-emitting surface. The side light-incident surfaces of the accommodating portion are coaxial.

The invention further provides a lamp, which includes a lampshade, a base, a lens and a light emitting diode light source. The base and the lampshade are assembled together, and the lens is arranged on the base and located in the lampshade. The lens has an accommodating portion, a first light-emitting surface and a second light-emitting surface, wherein the first light-emitting surface is located above the accommodating portion, and the second light-emitting surface surrounds the first light-emitting surface and is located outside the accommodating portion, while the second light-emitting surface The first light-emitting surface and the second light-emitting surface are concave. The light emitting diode light source is arranged in the accommodating part of the lens.

In an embodiment of the lamp of the present invention, the accommodating portion has a top incident light surface and a side light incident surface, the top light incident surface is located above the light-emitting diode light source, and the side light incident surface surrounds the top light incident surface. surface, and the light-emitting diode light source is located in the side incident light surface.

In an embodiment of the lamp of the present invention, the above-mentioned first light-emitting surface has a first sub-light-emitting surface and a second sub-light-emitting surface, the first sub-light-emitting surface is a plane, and is parallel to the top light-emitting surface, and The second sub-light-emitting surface surrounds the first sub-light-emitting surface and is connected with the second light-emitting surface.

In an embodiment of the lamp of the present invention, the above-mentioned second sub-light-emitting surface is an inclined surface or a curved surface.

In an embodiment of the lamp of the present invention, the section of the above-mentioned first light-emitting surface is funnel-shaped.

In an embodiment of the lamp of the present invention, the diameter of the above-mentioned first sub-light-emitting surface is 0.5 mm.

In an embodiment of the lamp of the present invention, the above-mentioned second light-emitting surface has a third sub-light-emitting surface and a fourth sub-light-emitting surface, the third sub-light-emitting surface is connected to the first light-emitting surface, and the fourth sub-light-emitting surface is connected to the first light-emitting surface. The side light-incident surfaces of the accommodating portion are coaxial.

Based on the above, the lens of the present invention has the advantages of simple shape and improved viewing angle, and the use of this lens in a lamp can change the light path of the light-emitting diode light source, so that the light-emitting diode light source that is a directional light source can also It can be used in decorative lamps.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic perspective view of a lens according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the lens along the line A-A in FIG. 1 .

FIG. 3 is a schematic diagram of a lamp applying the lens of FIG. 1 .

Fig. 4 is a schematic diagram of the light path of the light emitted by the light emitting diode light source in the lens.

FIG. 5 is a schematic diagram of simulating the viewing angle range of the lamp in FIG. 3 by software.

FIG. 6 is a schematic diagram of actually measuring the viewing angle range of the lamp in FIG. 3 .

Reference signs:

100: lamps

110: lampshade

120: base

130: lens

132: Accommodating Department

132a: Top incident light surface

132b: side incident light surface

134: The first light-emitting surface

134a: the first sub-light emitting surface

134b: the second sub-light-emitting surface

136: Second light-emitting surface

136a: The third sub-light emitting surface

136b: the fourth sub-light-emitting surface

140: light emitting diode light source

Detailed ways

FIG. 1 is a schematic perspective view of a lens according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of the lens along line A-A of FIG. 1 . Please refer to FIG. 1 and FIG. 2 at the same time. The lens 130 has an accommodating portion 132, a first light-emitting surface 134 and a second light-emitting surface 136, wherein the first light-emitting surface 134 is located above the accommodating portion 132, and the second light-emitting surface 136 surrounds the first light-emitting surface 134 and is located outside the accommodating portion 132 , and the first light-emitting surface 134 and the second light-emitting surface 136 are concave surfaces. In detail, the accommodating part 132 is used for accommodating the light source, wherein the lens 130 of this embodiment is mainly used to improve the application range of the directional light source, so the lens 130 is used to cover the light emitting diode.

The accommodating portion 132 of the aforementioned lens 130 has a top light incident surface 132a and a side light incident surface 132b, wherein the top light incident surface 132a is a plane, and the side light incident surface 132b surrounds the top light incident surface 132a, and the top light incident surface 132b The space jointly formed by the light surface 132a and the side incident light surface 132b is used for accommodating a light emitting diode light source.

In addition, the first light-emitting surface 134 has a first sub-light-emitting surface 134a and a second sub-light-emitting surface 134b, wherein the first sub-light-emitting surface 134a is a plane and is parallel to the top light-emitting surface 132a, and the second sub-light-emitting surface 134b surrounds the first light-emitting sub-surface 134a and is connected to the second light-emitting surface 136, and the second light-emitting sub-surface 134b in this embodiment is a slope. In other words, the cross-section of the first light-emitting surface 134 is approximately funnel-shaped.

Furthermore, the second light-emitting surface 136 may have a third sub-light-emitting surface 136a and a fourth sub-light-emitting surface 136b, wherein the third sub-light-emitting surface 136a is connected between the first light-emitting surface 134 and the fourth sub-light-emitting surface 136b, Moreover, the fourth sub-light-emitting surface 136 b is coaxial with the side light-incident surface 132 b of the accommodating portion 132 .

FIG. 3 is a schematic diagram of a lamp applying the lens of FIG. 1 , and FIG. 4 is a schematic diagram of a light path of light emitted by a light-emitting diode light source in the lens. Please refer to FIG. 3 and FIG. 4 at the same time, the above-mentioned lens 130 is applied in a lamp 100 , wherein the lamp 100 includes a lampshade 110 , a base 120 , the above-mentioned lens 130 and a light-emitting diode light source 140 . The base 120 is assembled with the lampshade 110, and the lens 130 is arranged on the base 120 and is located in the lampshade 110, the light-emitting diode light source 140 is arranged in the accommodating part 132 of the lens 130, and the light-emitting diode light source 140 The light-emitting surface of the accommodating portion 132 faces the light-incident surface 132 a.

When the light emitting diode light source 140 emits light, the light will enter the lens 130 from the top light incident surface 132a and the side light incident surface 132b of the accommodating portion 132 of the lens 130, wherein because the light emitting diode light source 140 is a directional light source, Therefore, most of the light enters the lens 130 from the incident light surface 132a.

Part of the light entering the lens 130 is projected onto the third sub-light-emitting surface 136a and the fourth sub-light-emitting surface 136b of the second light-emitting surface 136 before exiting, and part of the light is projected onto the first light-emitting surface 134, wherein it is projected to the first sub-light-emitting surface 136b. The light on the surface 134a will be directly emitted out of the lens 130 because of the light incident angle; and the light projected to the second sub-light-emitting surface 134b will also be reflected by the second sub-light-emitting surface 134b due to the light incident angle. , and emit light toward the third sub-light-emitting surface 136a.

It can be seen from FIG. 4 that if the first light-emitting surface 134 is a plane, the light originally emitted by the light-emitting diode light source 140 will be emitted directly after being projected onto the first light-emitting surface 134, so that the viewing angle range of the lamp 100 will be concentrated in the In the light emitting direction of the light emitting diode light source 140 , there will be a problem of uneven brightness and darkness in which the brightness is concentrated in front of the lamp 100 . The lens 130 of this embodiment is improved, so that the first light-emitting surface 134 has a first sub-light-emitting surface 134a that is flat and a second sub-light-emitting surface 134b that is inclined at an angle to the first light-emitting surface 134a, wherein the first The diameter of the sub-light-emitting surface 134a is equal to or greater than 0.5mm, so that the light emitted by the light-emitting diode light source 140 can still exit through the first sub-light-emitting surface 134a (ie, in the direction of light emission). In addition, the second sub-light-emitting surface 134b can reflect the light projected to the second sub-light-emitting surface 134b and then project to the third sub-light-emitting surface 136a before being emitted, so as to increase the viewing angle range of the lamp 100 when emitting light. 5 and 6 are schematic diagrams of the viewing angle range of the lamp in FIG. 3 , wherein FIG. 5 is a graph obtained by software simulation, and FIG. 6 is a graph obtained by actual measurement. It can be seen from FIG. 5 and FIG. 6 that the viewing angle range of the lamp 100 of this embodiment can reach about plus or minus 110 degrees. When 0 degrees is used as the front of the lamp 100, the user can still see the lamp 100 shining from the rear of the lamp 100, which improves that the existing directional light source can only be applied to the lamp with a fixed irradiation direction, and now through this implementation The application of the lens 130 of the example allows the candle light lamp to use light-emitting diodes as the light source. In addition, viewed as a whole, the lamp 100 also has uniform brightness.

Although the above-mentioned embodiment is described with the second sub-light-emitting surface 134b as an inclined surface, in other unshown embodiments, the second sub-light-emitting surface 134b can also be a curved surface such as a convex surface or a concave surface, as long as it can achieve the light part. Penetrating and partially reflecting, in order to increase the range of light emitting angles.

In the above description, concave means concave toward the inside of the lens 130, and convex means convex outside the lens 130, but those of ordinary skill in the art should know that concave and convex described in the above-mentioned embodiments are relative concepts However, the present invention is not limited to the written descriptions or graphical representations of the above-mentioned embodiments.

To sum up, the lens of the present invention has the advantages of simple shape. Furthermore, using this lens together with a directional light-emitting diode light source can improve the viewing angle range of the light-emitting diode light source, so that the light-emitting diode light source can also be applied to decorative lamps, which further improves the The application level of the light-emitting diode light source, and the lamps that use the light-emitting diode as the light source can also have uniform brightness.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention, and any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention.

Claims (8)

1. A lens, and a light-emitting diode light source is suitable for disposing in the lens, the lens has an accommodating portion, a first light-emitting surface and a second light-emitting surface, wherein the accommodating portion has a top-in A light surface and a side light incident surface, the top light incident surface is located above the light-emitting diode light source, and the side light incident surface surrounds the top light incident surface, and the light-emitting diode light source is located in the side light incident surface , the first light-emitting surface is located above the accommodating portion, and the second light-emitting surface surrounds the first light-emitting surface and is located outside the accommodating portion, and the first light-emitting surface and the second light-emitting surface are concave surfaces, and The first light exit surface has a first sub light exit surface and a second sub light exit surface. The sub-light-emitting surface is connected with the second light-emitting surface, and the second light-emitting surface has a third sub-light-emitting surface and a fourth sub-light-emitting surface, the third sub-light-emitting surface is connected to the first light-emitting surface, and the fourth sub-light-emitting surface The sub-light-emitting surface is coaxial with the side light-incident surface of the accommodating portion. 2. The lens according to claim 1, wherein the second sub-light-emitting surface is an inclined surface or a curved surface. 3. The lens according to claim 1, wherein a section of the first light-emitting surface is funnel-shaped. 4. The lens according to claim 1, wherein a diameter of the first sub-light-emitting surface is 0.5 mm. 5. A lamp, comprising: a lampshade; A base, assembled with the lampshade; A lens is arranged on the base and is located in the lampshade. The lens has an accommodating portion, a first light-emitting surface and a second light-emitting surface, wherein the accommodating portion has a top light-incoming surface and a side-incoming surface. the light surface, and the side incident light surface surrounds the top incident light surface, The first light-emitting surface is located above the accommodating portion, and the second light-emitting surface surrounds the first light-emitting surface and is located outside the accommodating portion, and the first light-emitting surface and the second light-emitting surface are concave surfaces, and the The first light-emitting surface has a first sub-light-emitting surface and a second sub-light-emitting surface. The first sub-light-emitting surface is a plane and is parallel to the top light-incoming surface. The light-emitting surface is connected to the second light-emitting surface, the second light-emitting surface has a third sub-light-emitting surface and a fourth sub-light-emitting surface, the third sub-light-emitting surface is connected to the first light-emitting surface, and the fourth sub-light-emitting surface The surface is coaxial with the side light-incident surface of the accommodating portion; and A light-emitting diode light source is arranged in the accommodating portion of the lens, and the light-incident surface is located above the light-emitting diode light source. 6. The lamp according to claim 5, wherein the second sub-light-emitting surface is an inclined surface or a curved surface. 7. The lamp according to claim 5, wherein a section of the first light-emitting surface is funnel-shaped. 8. The lamp according to claim 5, wherein the diameter of the first sub-light-emitting surface is 0.5 mm.