TW201348650A - Lens element for light source module and illuminator thereof - Google Patents

Abstract

The present invention discloses a light source module including a light source and a lens element. The light source includes a light source axis and is covered by the lens element. The lens element includes a lens axis, an inner surface, an outer surface, and a protrusion. The light source axis is not associated with the lens axis. The inner surface is disposed between the light source and the outer surface, and the protrusion is disposed on the outer surface. Light transmitted from the light source is refracted by the inner and outer surfaces to project toward a main direction. Simultaneously, light transmitted from the light source is refracted by the inner surface, reflected by the protrusion, and refracted by the outer surface to project toward the main direction. An illuminator including the light source module is also disclosed.

Description

Lens component for light source module and lighting fixture thereof

The present invention relates to a light source module, and more particularly to a light source module using a lens element to enhance illumination efficiency, and a lighting fixture using the same.

Compared with conventional light sources of tungsten or mercury lamps, light-emitting diodes (LEDs) provide better luminous efficiency and can achieve brighter illumination at the same power consumption. Moreover, the smaller volume than the conventional light source is also the advantage of the LED light source.

As a lighting fixture for roads or parking lots, commonly known as street lamps, because the installation location is around roads or parking garages, lighting must be directed to roads or parking areas, and to avoid the "light damage" caused by road lighting. Therefore, when the LED light source is applied to the lighting fixture, the light of the LED light source must be guided to the desired illumination direction by the street lamp mechanism to avoid the light damage of the roadside house and increase the illumination brightness of the desired illumination direction.

In order to achieve the light source of the street light source can be concentrated as much as possible in the direction of the desired illumination and less influence on the light damage of the roadside house, the inventor proposes a novel lens structure, which is applied to the light source module and its lighting fixture. Get the desired effect.

It is an object of the present invention to provide a lens element for a light source module that directs most of the light emitted by the light source to the desired primary illumination direction while minimizing illumination in the secondary illumination direction. In the present invention, when the light source module using the lens element and the illumination lamp thereof are applied to a street lamp, the main illumination direction refers to a desired illumination direction such as a road, and the secondary illumination direction refers to a roadside house. The direction of illumination, ie the main direction of illumination relative to the direction of secondary illumination. In the present invention, the light source in the light source module may be a light-emitting diode (LED), and the lens element refers to an optical lens additionally attached to the light-emitting diode by a user, which is generally referred to as a secondary lens, which is different from the light-emitting diode. A primary lens formed by a polar body during packaging.

An embodiment of the present invention provides a light source module including: a light source having a light source optical axis; and a lens element surrounding the light source and having a lens optical axis, an inner lens surface, an outer lens surface, and a lens Projection reflection portion. The inner lens surface is located between the light source and the outer lens surface, and the protruding reflection portion is formed on the outer lens surface and does not intersect the optical axis of the lens. The inner lens surface is formed with a recess to accommodate the light source, and the light source optical axis of the light source is spaced from the lens optical axis of the lens. The outer lens surface is generally curved and the raised reflector is higher than any point on the outer lens surface such that light within the lens element will form a total reflection within the raised reflector. Therefore, the light emitted by the light source is sequentially projected toward the main illumination direction through the refraction of the inner lens surface and the outer lens surface, and the light emitted by the light source is sequentially reflected by the inner lens surface and reflected by the protruding reflection portion. The outer lens surface is refracted to project in the main illumination direction.

The lens element further includes a mirror edge surrounding the outer lens surface, the protrusion reflecting portion being higher than any point on the outer lens surface, that is, based on a reference plane formed by the mirror edge.

According to the above embodiment, the lens surface outside the lens element has a lens center, a symmetry line, a first curve and a second curve. The symmetry line, the first curve, and the second curve are imaginary lines of the lens surface. In the present specification, the line of symmetry of the outer lens surface is defined as a line of symmetry passing through the center of the lens and passing through the protrusion reflecting portion, and the lens element is mirror-symmetrical with respect to the line of symmetry.

In the present specification, the first curve and the second curve must conform to the following definition: the first curve is one imaginary line on the outer lens surface and does not pass through the protruding reflection portion, and the first curve and the symmetry line have less than 90 degrees. The first angle; and the second curve is a imaginary line on the outer lens surface and not passing through one of the protrusion reflection portions, and has a second angle between 90 degrees and 180 degrees from the symmetry line. Any point on the line of symmetry is lower than the highest point of the first curve and the second curve on the surface of the outer lens. Among them, the height is based on the reference plane formed by the mirror edge.

According to the above embodiment, a dielectric paste can be filled between the light source and the lens element.

According to the above embodiment, the light source module further includes a circuit board electrically connected to the light source.

According to the above embodiment, the light source module further includes a reflector. The reflector is disposed between the light source and the circuit board.

According to the above embodiment, the protruding reflection portion may be a rectangular retaining wall that intersects the line of symmetry. The protruding reflection portion may also be an arc-shaped retaining wall, and the curved arc center and the lens optical axis are located on the same side with respect to the protruding reflection portion.

Another embodiment of the present invention provides a lighting fixture comprising: a cover having an opening; a light source module coupled to the cover and including a light source and a lens component. The light source has an optical axis of the light source, and the lens element surrounds the light source and protrudes from the opening of the cover. The lighting fixture further comprises a waterproof rubber disposed between the light source module and the cover body.

In the illumination lamp of the embodiment, the features of the light source module and the lens element are the same as those of the foregoing light source module and lens element, and details are not described herein.

According to the embodiment, the lighting fixture further includes a heat sink connected to the light source module for dissipating heat generated by the light source module.

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

Embodiments of the present invention will be described below in conjunction with the drawings.

Figure 1 shows a schematic view of a lighting fixture placed next to a road and its corresponding primary and secondary lighting directions. As shown in Fig. 1, the light output of the lighting fixture 1 disposed beside the road 11 is 11D, 11R indicates a main illumination direction, and 11H indicates a primary illumination direction. The main illumination direction 11R may also be referred to as a road side direction, and the secondary illumination direction 11H may also be referred to as a house side direction. In order for the road 11 to have good illumination, the light 11D of the lighting fixture 1 should be illuminated as much as possible to the main illumination direction 11R, and the illumination of the secondary illumination direction 11H is reduced.

2A and 2B are respectively an exploded schematic view and a combined schematic view of a lighting fixture according to an embodiment of the present invention. Referring to FIG. 2A , the lighting fixture 1 of the present invention includes a light source module 100 , a cover 200 , a waterproof member 300 , and a heat sink 400 . The light source module 100 includes at least one light source 110, at least one lens element 120, a reflective plate 130, and a substrate 140. In this embodiment, the light source 110 is mounted on the substrate 140, and the reflective plate 130 is attached to the substrate 140 and exposed through the opening 131 in the reflective plate 130 to expose the light source 110. The mounting of the reflector 130 is optional to reflect the light emitted by the source 110.

The light source 110 can be a light emitting diode (LED), the lens element 120 covers the light source 110, and can also cover a plurality of light sources 110. The substrate 140 may be a ceramic circuit board or a metal circuit board having a better heat dissipation effect. The heat sink 400 is connected to the light source module 100. More specifically, the heat sink 400 is connected to the substrate 140 of the light source module 100 for dissipating the heat generated by the light source module 100 to the outside. In the present embodiment, the heat sink 400 may be an aluminum extruded heat sink having heat sink fins.

The light source 110, the lens element 120, the reflection plate 130, and the substrate 140 are combined into a light source module 100 and covered with a waterproof member 300. The waterproof member 300 is made of rubber or resin and has an opening 301 for receiving the lens element 120. In the present invention, the lens element 120 has a mirror edge 126 that can hold the lens element 120 when pressed against the waterproof member 300. The light source module 100 covered by the waterproof member 300 is further covered with a cover body 200 having an opening 201 corresponding to the opening 301 of the waterproof member 300 and the lens element 120. The waterproof member 300 is disposed between the light source module 100 and the cover 200. More specifically, the waterproof member 300 is disposed between the lens element 120 of the light source module 100 and the cover 200. The waterproof member 300 may be located between the lens element 120 and the reflective plate 130, that is, the lens element 120 is located between the cover 200 and the waterproof member 300, and is not limited to the one illustrated in FIG. 2A.

The lens element 120 has a plurality of positioning portions 125 corresponding to the first positioning holes 135 of the reflective plate 130 and the second positioning holes 145 of the substrate 140 such that the lens element 120 can be fixed on the substrate 140.

As shown in FIG. 2B, after the lighting fixture 1 is assembled, each of the lens elements 120 protrudes beyond the opening 201 of the cover 200, so that the light of the light source 110 can be guided through the lens element 120 to the outside of the lighting fixture 1 to form light. 11D.

3A and 3B are respectively a top perspective view and a bottom perspective view of the lens element of the present invention. The lens element 120 has a lens optical axis O ₁₂₀ , an inner lens surface 121 , an outer lens surface 122 , a protrusion reflecting portion 123 , a recess portion 124 , a plurality of positioning portions 125 , and a mirror edge 126 . Referring to FIG. 2A together, the light source 110 is covered by the lens element 120 and located in the recess 124. The light of the light source 110 enters the optical lens 120 through the inner lens surface 121 in the recess 124, and then exits the optical lens from the outer lens surface 122. 120. The protrusion reflecting portion 123 is formed on the outer lens surface 122 and does not intersect the lens optical axis O ₁₂₀ . In Fig. 3A, the shape of the protrusion reflecting portion 123 is a rectangular retaining wall.

4A is a front view showing the lens element shown in FIG. 3A; and FIG. 4B is a view showing a cross section taken along line AA of the lens element of FIG. 4A combined with the light source. In FIG. 4B, the lens optical axis O _{120 of the} lens element 120 is spaced from the source optical axis O ₁₁₀ of the light source ₁₁₀ , that is, the lens optical axis O ₁₂₀ of the lens element ₁₂₀ is from the source optical axis O ₁₁₀ toward the secondary illumination direction 11H. Offset by a distance G. The lens optical axis O ₁₂₀ may also be shifted from the source optical axis O ₁₁₀ toward the protrusion reflecting portion 123. The inner lens surface 121 is positioned between the light source 110 and the outer lens surface 122. The protrusion reflecting portion 123 is formed on the outer lens surface 122. The recess 124 is formed on the inner lens surface 121 to accommodate each of the light sources 110. In addition, an index matching gel P may be filled between each of the light sources 110 and each of the lens elements 120, that is, the dielectric paste P is filled in the recessed portion 124 of the lens element 120 to improve the light extraction efficiency of the light source 110.

As shown in FIG. 4B, each of the light sources 110 also has a primary lens 112. It is assumed that the intersection of the lens optical axis O _{120 of the} lens element 120 and the outer lens surface 122 is the lens center a, and the height h of the lens center a to the mirror edge 126 is smaller than the height H of the protrusion reflecting portion 123 to the mirror edge 126. That is, the protrusion reflecting portion 123 is higher than any point on the outer lens surface 122.

Fig. 5A is a schematic plan view showing the lens element shown in Fig. 3A. Referring to FIG. 4B together, the protrusion reflecting portion 123 is formed on the outer lens surface 122 and does not intersect the lens center a (ie, the intersection of the lens optical axis O ₁₂₀ and the outer lens surface 122). And in the case of the lens center a, the protrusion reflecting portion 123 is tied to one side toward the secondary illumination direction 11H.

Fig. 5B is a view showing a B-B cross section of the lens element of Fig. 5A after being combined with a light source. The height h of the lens center a to the mirror edge 126 is equal to or slightly smaller than the height H' of the outer surface of the lens center a from the outer surface 122 to the mirror edge 126.

Figure 6 is a schematic view showing the light output of the light source module of the lighting fixture of the present invention. The protruding reflection portion 123 of the lens element 120 is tied to one side toward the secondary illumination direction 11H, and the outer lens surface 122 is substantially in an irregular curved surface, and the curved surface terminates in the protruding reflection portion 123 so that it is inside the lens element 120. The light rays form total reflection in the protrusion reflecting portion 123. Therefore, the light ray R1 is sequentially projected to the main illumination direction 11R through the refraction of the inner lens surface 121 and the refraction of the outer lens surface 122, and the light ray R2 emitted by the light source 110 is sequentially refracted and reflected by the inner lens surface 121. The reflection of 123 and the refraction of the outer lens surface 122 are projected into the main illumination direction 11R. Compared with the secondary illumination direction 11H, the main illumination direction 11R obtains more light emitted by the light source 110. Therefore, if the light source module is applied to the street light, the light damage of the roadside house corresponding to the secondary illumination direction 11H can be reduced. And the road or parking lot corresponding to the main lighting direction 11R can obtain more light amount.

Fig. 7 is a view showing the surface of the lens outside the lens element of the present invention. The outer lens surface 122 is substantially an irregular curved surface and has a lens center a, a symmetry line W, a first curve X and a second curve Y. The protrusion reflecting portion 123 is offset from the lens center a, and the symmetry line w is divided into two symmetrical halves by the lens center a and the protrusion reflecting portion 123, that is, the lens element 120 is mirror symmetrical with respect to the symmetry line w. . The first curve X is located on the outer lens surface 122 and does not pass through an imaginary curve of the protrusion reflecting portion 123, extending from the lens center a toward the mirror edge 126. The first curve X and the symmetry line W have a first angle θ _{1 of} less than 90 degrees. The first curve X has a highest point x ₁ , that is, the farthest from the reference plane formed by the mirror edge 126, and the vertical distance from any point on the symmetry line W to the mirror edge 126 is smaller than the reference plane formed by the point x ₁ to the mirror edge 126. vertical distance. The second curve Y is located on the outer lens surface 122 and does not pass through one of the imaginary curves of the protrusion reflecting portion 123, and extends from the lens center a toward the mirror edge 126. The second curve Y and the symmetry line W have a second angle θ ₂ between 90 degrees and 180 degrees. The second curve Y has a highest point y ₁ , that is, the farthest from the reference plane formed by the mirror edge 126, and the vertical distance from any point on the symmetry line W to the mirror edge 126 is smaller than the reference plane formed by the point y ₁ to the mirror edge 126. vertical distance.

In the present invention, the imaginary curve of the first curve X and the second curve Y as shown in FIG. 7 is not only a single line as shown in the drawing, as long as the angle with the symmetry line meets the above definition, so that it can be constructed. The curved surface of the outer lens surface 122.

Figure 8 is a perspective view showing another lens element of the present invention. In the present embodiment, the difference between the lens element 120' and the lens element 120 is that the protrusion reflecting portion 123' is a circular arc-shaped retaining wall, and the arc-shaped arc center and the lens center a are positioned opposite to the protruding reflecting portion. The same side of 123'.

In addition, as shown in FIG. 9, the illumination lamp 1 of the present invention can also adopt a lens module in which a plurality of lens elements 120 are combined, even if the lens edge 126 of the plurality of lens elements 120 is integrally formed. The above lighting effect can also be achieved.

Although the present invention has been disclosed in its preferred embodiments, it is not intended to limit the present invention, and it is possible to make some modifications and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

1. . . Lighting fixture

11. . . the way

11D. . . sold out

11H. . . Secondary lighting direction

11R. . . Main lighting direction

100. . . Light source module

110. . . light source

112. . . Primary lens

120, 120’. . . Lens element

121. . . Inner lens surface

122. . . Outer lens surface

123, 123’. . . Projection reflection

124. . . Depression

125. . . Positioning department

126. . . Mirror edge

130. . . Reflective plate

131. . . Opening

135. . . First positioning hole

140. . . Substrate

145. . . Second positioning hole

200. . . Cover

201. . . Opening

300. . . Waterproof parts

400. . . Heat sink

O ₁₁₀ . . . Light source optical axis

O ₁₂₀ . . . Lens optical axis

A-A. . . Section line

B-B. . . Section line

G. . . distance

H, H', h. . . height

P. . . Media glue

R, R2. . . Light

W. . . Symmetry line

X. . . First curve

x ₁ . . . The highest point of the first curve

Y. . . Second curve

y ₁ . . . The highest point of the second curve

θ ₁ . . . First angle

θ ₂ . . . Second angle

Figure 1 shows a schematic view of a lighting fixture placed next to a road and its main illumination direction and secondary illumination direction;

2A is a schematic exploded view showing the lighting fixture of the present invention;

Figure 2B is a schematic view showing the combination of the lighting fixture of Figure 2A;

3A is a top perspective view showing the lens element of the present invention;

3B is a bottom perspective view showing the lens element shown in FIG. 3A;

Figure 4A is a front elevational view showing the lens element shown in Figure 3A;

Figure 4B is a schematic view showing the A-A cross section of the lens element of Figure 4A after being combined with the light source;

5A is a schematic plan view showing the lens element shown in FIG. 3A;

Figure 5B is a schematic view showing a B-B cross section of the lens element of Figure 5A after being combined with a light source;

Figure 6 is a schematic view showing the light output of the lens element of Figure 4B after being combined with the light source;

Figure 7 is a view showing the surface of the lens outside the lens element of the present invention;

Figure 8 is a perspective view showing another lens element of the present invention;

Fig. 9 is a perspective view showing a lens element forming module of the lighting fixture of the present invention.

1. . . Lighting fixture

11D. . . sold out

100. . . Light source module

110. . . light source

120. . . Lens element

125. . . Positioning department

126. . . Mirror edge

130. . . Reflective plate

131. . . Opening

135. . . First positioning hole

140. . . Substrate

145. . . Second positioning hole

200. . . Cover

201. . . Opening

300. . . Waterproof parts

400. . . Heat sink

Claims (18)

A light source module comprising:
a light source having a light source optical axis; and a lens element surrounding and covering the light source, and having a lens optical axis, an inner lens surface, an outer lens surface, and a protruding reflection portion, the inner lens surface being located at the light source Between the outer lens surface and the outer lens surface, the protruding reflection portion is formed on the outer lens surface and does not intersect the optical axis of the lens. The light source module of claim 1, wherein the inner lens surface is formed with a recessed portion for accommodating the light source, and the light source optical axis is spaced from the optical axis of the lens. The light source module of claim 1, wherein the lens element further comprises a mirror edge surrounding the outer lens surface. The light source module of claim 3, wherein the outer lens surface has a substantially curved surface, and a vertical height of the protruding reflection portion to the mirror edge is higher than a point on the outer lens surface to the mirror edge The vertical height is high. The light source module of claim 3, wherein the outer lens surface of the lens element has a lens center and a line of symmetry, the lens center being a point of intersection of the lens optical axis and the outer lens surface, the symmetry A line passes through the center of the lens and passes through the raised reflector, and the lens element is mirror symmetrical with respect to the line of symmetry. The light source module of claim 5, wherein a height from the center of the lens to the edge of the lens is equal to or less than an outer surface of one of the central circumferences of the lens to a height of the mirror edge. The light source module of claim 5, wherein the outer lens surface of the lens element further has a first curve, the first curve is not passing through the protruding reflection portion, and the first curve and the symmetry A first angle between the lines of less than 90 degrees is present, and any point on the line of symmetry is below the highest point of the first curve on the surface of the outer lens. The light source module of claim 7, wherein the outer lens surface of the lens element further has a second curve, the second curve is not passing through the protruding reflection portion, and the second curve and the symmetry The lines have a second angle between 90 degrees and 180 degrees, and any point on the line of symmetry is below the highest point of the second curve on the surface of the outer lens. The light source module of claim 5, wherein the protruding reflection portion is a rectangular retaining wall and intersects the symmetry line. The light source module of claim 5, wherein the protruding reflection portion is an arc-shaped retaining wall and intersects the symmetry line, the arc center of the curved retaining wall and the optical axis of the lens are opposite to the optical axis The same side of the protruding reflection portion. The light source module of claim 3, wherein the mirror edge is combined in a plurality of forms. The light source module of claim 1, wherein the light source module further comprises a circuit board electrically connected to the light source. The light source module of claim 12, wherein the light source module further comprises a reflector disposed between the light source and the circuit board. A lighting fixture comprising:
a cover having an opening; and a light source module, the light source module comprising:
a light source having a light source optical axis; and a lens element surrounding and covering the light source, and having a lens optical axis, an inner lens surface, an outer lens surface, and a protruding reflection portion, the inner lens surface being located at the light source Between the outer lens surface and the outer lens surface, the protruding reflection portion is formed on the outer lens surface and does not intersect the optical axis of the lens. The lighting fixture of claim 14, further comprising a substrate on which the light source is mounted. The lighting fixture of claim 15 further comprising a reflector, the reflector being attached to the substrate and passing through an opening in the reflector to expose the light source. The lighting fixture of claim 14, further comprising a waterproof member disposed between the light source module and the cover. The lighting fixture of claim 14, further comprising a heat sink connected to the light source module.