TWM452346U - Optical lens - Google Patents

Description

optical lens

This creative department is related to the field of illumination, in particular to an optical lens that directs light from a light-emitting diode to emit an elliptical light shape, which can be applied to a backlight module or an advertising billboard.

Light Emitting Diode (LED) has been widely used in the technical fields of lighting fixtures or backlight modules in recent years due to its low power consumption, high efficiency and long life. However, the light-emitting diode has a smaller light-emitting angle than the conventional light source, and thus, when applied to a lighting fixture, the number of light-emitting diodes needs to be increased.

For example, in the case of a backlight module, the light-emitting diode is disposed on the light-emitting strip for the point source to emit light. However, the light-emitting diode has a directivity range, so it is necessary to adjust to the required range according to the light output thereof, so as to be suitable for On the backlight module. Therefore, how to effectively improve the projection intensity, the projection range, and the uniformity of illumination of the LED light source is a subject that the practitioners in the field are eager to improve.

In terms of demand, designing an optical lens that can guide the light of a light-emitting diode to produce a kind of elliptical light shape can provide the best illumination state under various use conditions, and has become a market application. An urgent issue.

In view of the above-mentioned problems of the prior art, the purpose of the present invention is to provide an optical lens that guides the light of the LED to emit an elliptical light shape, which can be applied to the backlight module to reduce the number of light strips thereof. Technical issues.

According to the purpose of the present invention, an optical lens is provided for guiding a light of a light-emitting diode to produce an elliptical light shape, and the optical lens has a lens body including a light-emitting surface and a light-incident surface. The light-emitting surface is a curved surface, and the projection surface of the light-emitting surface has an elliptical shape and has a long axis and a short axis, the long axis has a length a, and the short axis has a length b, and the short axis is Vertical to the long axis, the center of the light exit surface has a vertex. In addition, the light incident surface has an inner curved surface and a bottom surface, and the inner curved surface is configured to receive the light emitting diode, and the light incident surface is coupled to the light emitting surface to form an outer surface of the lens body. Further, the lens body has a lens height c. The length a of the major axis, the length b of the minor axis, and the height c of the lens are in accordance with the following relationship: 1 < a / b ≦ 1.67; and 2 ≦ a / c ≦ 6.

In addition, in order to adjust the different elliptical effects of the light, the bottom surface may be provided with a sawtooth structure, a dot structure, an atomization structure or a combination thereof, thereby improving the applicability in different use states or environments.

In the present invention, the light incident surface of the lens body is concavely formed with a receiving chamber having the inner curved surface for receiving the light emitting diode The edge of the inner curved surface is closed to form a circular opening or an elliptical opening. The shape of the opening determines the distance and angle of the light source into the lens body, thereby changing the path performance after the light exits. By this, the different light-emitting effects and uniformity can be further adjusted.

In addition, the optical lens of the present invention further comprises an outer wall, the outer wall is disposed on the lens body, and the outer wall surface is provided with a dot structure or an atomizing structure. The optical lens further includes a plurality of legs, and the legs are disposed at the bottom of the outer wall. In this way, in the process of installing the LEDs with each other, for example, the assembly process of the backlight module, the loading of some terminal products can be quickly realized.

Preferably, the central surface of the light-emitting surface of the optical lens of the present invention is one of a flat plane, a concave curved surface or a convex curved surface. Through the adjustment of the different structures, the light-emitting diode light source can exhibit a different light source illumination effect that is substantially divergent or focused on the light-emitting surface.

In addition, in the present creation, the center point position of the inner curved surface is accompanied by the change of the vertex position of the light exiting surface in the same direction under the one-dimensional space coordinate. Thereby, under the change of the size design or some microstructure changes of the optical lens, the transmission path of the light trajectory in the lens body can be prevented from being excessively dispersed to affect the intensity performance of the target illumination area.

The above and other objects, features and advantages of the present invention will become more apparent and understood. The formula is described in detail below.

The embodiments of the optical lens according to the present invention will be described below with reference to the related drawings. For ease of understanding, the same components in the following embodiments are denoted by the same reference numerals.

Please refer to FIG. 1A, FIG. 1B and FIG. 1C, which are schematic perspective views, a top view and a cross-sectional view of a first embodiment of the optical lens of the present invention. The optical lens 1 of the present invention has a lens body 10 for generating a type of elliptical light by guiding light of a light emitting diode (not shown), and the optical lens 1 includes a light emitting surface 11 and an input. Glossy 12. The light-emitting surface 11 is a curved surface, and the projection surface of the light-emitting surface 11 has an elliptical shape and has a long axis 111 and a short axis 112. The long axis 111 has a length a1 and the short axis 112 has a length b1. The short axis 112 is perpendicular to the long axis 111 and has a vertex P at a center position of the light exiting surface, and the vertex P is located on the surface of the light emitting surface 11 . The light incident surface 12 has an inner curved surface 121 and a bottom surface 122, and the light incident surface 12 is connected to the light exit surface 11 to form an outer surface of the lens body 10. Further, the lens body 10 has a lens height c.

The length of the major axis a, the length b of the minor axis, and the height c of the lens are preferably in accordance with the following relationship: 1 < a / b ≦ 1.67; and 2 ≦ a / c ≦ 6. The relationship between a and b is effective to maintain the realization of the elliptical shape and the applicability in different environments; The relationship between a and c is to control the overall illumination uniformity of the elliptical shape, thereby achieving an illumination effect of extremely uniformity and an elliptical shape.

In the present embodiment, the major axis length a, the minor axis length b, and the lens height c are made of the following ratios: a:b:c=2.2:2:1.1. Such a ratio can effectively exhibit an elliptical light-like illumination effect, and can reduce the efficiency of light-shaped overlap or illumination area by abutting a plurality of elliptical light-like shapes. In addition to this, the range of the irradiation area can be increased, and the amount of the light-emitting diode used as a whole can be greatly reduced to reduce the cost of the end product.

Please refer to FIGS. 2A, 2B and 2C again, which are respectively a perspective view, a top view and a cross-sectional view of a second embodiment of the optical lens. The bottom surface 122 can be provided with a sawtooth structure, a dot structure, an atomization structure or a combination thereof. However, in the embodiment, the bottom surface 122 is provided with the same. The sawtooth structure is taken as an example, but is not limited thereto.

As shown in the figure, the accommodating chamber 120 is recessed to form an accommodating chamber 120, and the accommodating chamber 120 has an inner curved surface 121 for accommodating the illuminating diode, and the edge of the inner curved surface 121 is closed. An opening 1201, and the opening 1201 can be a circular opening or an elliptical opening. Since the different opening shapes determine the distance and angle of the light source into the lens body, the path performance after the light exit is changed. borrow This can further adjust the different light output effects and uniformity presentation. For example, when the light emitting diode emits a light source, the light source can be incident into the lens body 10 from the light incident surface 12, and a striated structure of the inner curved surface 121 and the bottom surface 122 can be used to refract and adjust different light trajectories and directions. The light-emitting surface 11 is emitted to form an elliptical light-like shape.

Incidentally, the central surface of the light-emitting surface 11 is one of a flat plane, a concave curved surface or a convex curved surface. Through the adjustment of the different structures, the light-emitting diode light source can exhibit a different light source illumination effect that is substantially divergent or focused on the light-emitting surface. The optical lens 1 of the present invention is further provided with an outer wall 13 and a plurality of legs 14 . The outer wall 13 is disposed on the lens body 10 , and a surface of the outer wall 13 is disposed on the surface of the outer wall 13 . A dot structure or an atomizing structure, and the legs 14 are disposed at the bottom of the outer wall 13. In this way, in the process of installing the LEDs with each other, for example, the assembly process of the backlight module, the loading of some terminal products can be quickly realized.

Then, according to the first and second embodiments, the third embodiment is further illustrated by the present invention.

Please refer to FIG. 3A, FIG. 3B and FIG. 3C together, which is a perspective view, a top view and a cross-sectional view of a third embodiment of the optical lens of the present invention. The optical lens 2 has a lens body 20 and includes a light emitting surface 21 and a light incident surface 22 . The light exit surface 21 is a curved surface, and the projection surface of the light exit surface 21 is The elliptical shape has a long axis 211 and a short axis 212. The long axis 211 has a length a2, and the short axis 212 has a length b2. The short axis 212 is perpendicular to the long axis 211, and the center of the light emitting surface is further The position has a vertex P which is located on the surface of the light exit surface 21. The light incident surface 22 has an inner curved surface 221 and a bottom surface 222. The inner curved surface 221 is for receiving the light emitting diode. The lens body 20 has a lens height c. The light incident surface 22 is connected to the light exit surface 21 to form an outer surface of the lens body 20.

In the present creation, the major axis length a, the minor axis length b, and the lens height c preferably satisfy the following relationship: 1 < a / b ≦ 1.67; and 2 ≦ a / c ≦ 6. The relationship between a and b is effective to maintain the realization of the elliptical shape and the applicability in different environments; the relationship between a and c is to control the overall illumination uniformity of the elliptical shape. Thereby, an illumination effect with an extremely high uniformity and an elliptical light shape is achieved.

In the present embodiment, the major axis length a, the minor axis length b, and the lens height c are made up of the optical lens 2 by the following relationship: a:b:c=10.02:6:1.67. This ratio further adjusts the effect of the oval-like change compared to the previous embodiment. That is, the ratio of the long and short axes is quite different. It is to be noted that although the present embodiment is different from the ellipse ratio of the foregoing embodiment, the center point Q position of the inner curved surface 221 is accompanied by the vertex P position of the light exit surface 21 being the same direction under one-dimensional space coordinates. Change. specific The light-emitting surface 21 and the inner curved surface 221 have a mutual relationship. When the height of the light-emitting surface 21 is higher, the more concentrated light shape can be formed; if the opening size of the inner curved surface 221 is constant, and the height of the inner curved surface 221 is higher, the more divergent light shape can be obtained. If the optical lens of the present invention is applied to a backlight source, the size of the illumination range needs to be considered. Therefore, in order to overcome the problem of the prior art, the height of the light-emitting surface 21 and the height of the inner curved surface 221 are determined by using the bottom surface 222 as a reference surface. They are proportional to each other to achieve a better elliptical shape.

The light incident surface 22 of the lens body 20 of the embodiment is concavely formed with a receiving chamber 220 of the inner curved surface 221 for accommodating the light emitting diode, and the position and height of the light emitting diode are set. It can be adjusted according to different needs, and is not limited here.

In addition, the accommodating chamber 220 formed by the inner curved surface 221 can be axially symmetrically disposed through the lead line of the apex P, and the edge of the inner curved surface 221 is closed to form a circular opening 2201, or is asymmetric. In a manner, the edge of the inner curved surface 221 is enclosed to form an elliptical opening 2201.

In this way, the optical lens 2 of the present invention can guide the light of the light-emitting diode to emit an elliptical light shape. Therefore, if the present invention is applied to a backlight module, the light on the light-emitting strip of the backlight module is illuminated. The LED light-emitting shape is elliptical, and the light-shaped distribution is wider than the conventional circular light shape, thereby reducing the number of light-emitting strips of the backlight module, in other words, reducing material cost and process time. cost.

Please refer to FIGS. 4A and 4B again, which are respectively a bottom view and a cross-sectional view of a fourth embodiment of the present optical lens. In order to meet the applicability in different use states or environments, as shown, the bottom surface 322 can be provided with a dot structure, an atomizing structure or a combination thereof, and in the embodiment, the bottom surface 322 is disposed. The dot structure is taken as an example, but is not limited thereto.

However, the above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and the equivalent or easy change of the skill of the art is not deviated from the spirit of the present creation. Equal changes and modifications made to the scope of the application shall be covered by the scope of this creation.

1, 2, 3‧‧‧ optical lenses

10, 20, 30‧ ‧ lens body

11, 21, 31‧‧ ‧ light surface

111, 211, 311‧‧‧ long axis

112, 212, 312‧‧‧ short axis

12, 22, 32‧‧‧ into the glossy surface

120, 220, 320‧‧‧ housing room

1201, 2201‧‧‧ openings

121, 221, 321‧‧‧ internal curved surface

122, 222, 322‧‧‧ bottom

13, 23, 33‧‧‧ outer wall

14, 24‧‧ ‧ column feet

P‧‧‧ vertex

Q‧‧‧ center point

a‧‧‧Long shaft length

b‧‧‧Short shaft length

c‧‧‧Lens height

Fig. 1A is a perspective view showing a first embodiment of the optical lens of the present invention.

Figure 1B is a top plan view of the first embodiment of the optical lens of the present invention.

Fig. 1C is a schematic cross-sectional view showing a first embodiment of the optical lens of the present invention.

Fig. 2A is a perspective view showing a second embodiment of the optical lens of the present invention.

Figure 2B is a top plan view of a second embodiment of the optical lens of the present invention.

Figure 2C is a cross-sectional view showing a second embodiment of the optical lens of the present invention.

Fig. 3A is a perspective view showing a third embodiment of the optical lens of the present invention.

Figure 3B is a top plan view of a third embodiment of the optical lens of the present invention.

Figure 3C is a cross-sectional view showing a third embodiment of the optical lens of the present invention.

Fig. 4A is a bottom view showing a fourth embodiment of the optical lens of the present invention.

Figure 4B is a cross-sectional view showing a fourth embodiment of the optical lens of the present invention.

1‧‧‧ optical lens

11‧‧‧Glossy

111‧‧‧ long axis

112‧‧‧Short axis

13‧‧‧ outer wall

P‧‧‧ vertex

a‧‧‧Long shaft length

b‧‧‧Short shaft length

Claims (7)

An optical lens for guiding a light of a light emitting diode to produce an elliptical light shape, wherein the optical lens has a lens body, comprising: a light emitting surface, a curved surface, and a projection surface of the light emitting surface An elliptical shape having a major axis and a minor axis, the length of the major axis being a, the length of the minor axis being b, the minor axis being perpendicular to the major axis; and the center of the light exiting surface having a vertex And a light incident surface is connected to the light exiting surface to form an outer surface of the lens body, the light incident surface has an inner curved surface and a bottom surface, wherein the inner curved surface is for receiving the light emitting diode; The lens body has a lens height c, and the length a of the major axis, the length b of the minor axis, and the height c of the lens are in accordance with the following relationship: 1<a/b≦1.67; and 2≦a/c≦ 6. The optical lens of claim 1, wherein the bottom surface is provided with a sawtooth structure, a dot structure, an atomization structure or a combination thereof. The optical lens of claim 1, wherein the edge of the inner curved surface is closed to form a circular opening or an elliptical opening. For example, the optical lens described in claim 1 is more The outer wall is disposed on the lens body, and the outer wall surface is provided with a dot structure or an atomizing structure. The optical lens of claim 4, further comprising a plurality of legs, and the legs are disposed at the bottom of the outer wall. The optical lens of claim 1, wherein the central surface of the light-emitting surface is one of a plane, a concave curved surface or a convex curved surface. The optical lens of claim 1, wherein a center point position of the inner curved surface is accompanied by a change in the same direction of the vertex position of the light exiting surface in a one-dimensional space coordinate.