TW201616044A - Optical component and illumination apparatus having the optical component - Google Patents

Abstract

An optical component and illumination apparatus having the optical component are described. The optical component includes a main body, an incident surface and light-emitting surface. The main body forms a recess space in the bottom portion of the main body. The incident surface is defined by the recess space for being issued by an incident light and includes an annular region having at least a plurality of micro-structures thereon wherein each of the micro-structures includes a camber surface. The light-emitting surface is formed on the outer surface of the main body wherein a bottom edge of the outer surface is adjacent to an outer edge of the bottom portion of the main body. The present invention is capable of eliminating the yellow ring effect, increasing the light utilization rate and solving the problem of central light spot.

Description

Optical element and illuminating device having the same

The present invention relates to an optical element and an illumination device having the same, and in particular to an optical element having a microstructure on a light incident surface and an illumination device having the same.

With the backlight module of light-emitted diode (LED) TV constantly facing various demands of large size, light weight, thin thickness and high performance, how to further enhance these design requirements has become LED TV in recent years. A new trend in the development of backlight modules. At present, when the LEDs used in the LED backlight module contain phosphor powder and because the LEDs are very close to the diffusion plate, the light passes through the backlight lens, which is easy to produce uneven imaging of the diffusion plate and cause a yellow circle phenomenon, which affects the television. Display quality.

As shown in FIG. 1, in the backlight lens 100 of the prior art, in order to solve the above problem, the illuminating aperture 102 changes the reflection and refraction of the light of the LED 106 by a single curved surface 104, usually the illuminating aperture 102 of the lower half 103. The shape is a straight (sudden) shape (ie, the slope is large), and the yellowish light 105 is directed toward the sides of the backlight lens 100 to the direction outside the target projection area to reduce the problem of the yellow circle; The way to solve the effect of a part of the yellow circle, but the yellowish light 105 will cause a part of the light to be thrown when it is projected outward. Furthermore, the backlight modules are mostly arranged with a plurality of LEDs. At the same time, a plurality of backlight lenses 100 need to be matched. Therefore, the light rays 105 that are directly yellowed out may affect the spot of the target projection area of the other backlight lenses, which may cause unevenness of the chromaticity of the spot. In addition, the illuminating hole 102 of the lower half 103 is in a straight state, and a part of the light is reflected by the side wall of the illuminating hole 102, and directly passes toward the top 110 of the illuminating hole 102, so that the image spot has a central bright spot, and must be The center of the light-emitting surface is additionally made into a concave surface 108 to avoid the central bright spot, which requires high cost and complicated process steps.

Therefore, there is a need to develop a new type of optical component and illumination device to solve the above problems.

An object of the present invention is to provide an optical component and an illumination device having the same, which are provided with a plurality of microstructures having a curved surface at least on the ring of the light-incident surface to reduce the yellow circle phenomenon and improve light utilization efficiency. And solve the problem that the optical component causes the central highlight.

In order to achieve the above object, a preferred embodiment of the present invention provides an optical component comprising: a body, a bottom portion of the body forming a concave space; and a light incident surface defined by the concave space of the body for providing a light Injecting, and the light incident surface has an annular region, wherein the light incident surface is provided with at least a plurality of microstructures on the annular region, each of the microstructures having a curved surface; and a light emitting surface formed outside the body a surface, wherein a bottom edge of the outer surface abuts an outer edge of the bottom of the body.

In one embodiment, each of the microstructures is formed by the body being recessed or convex toward the concave space.

In an embodiment, the arc of each of the microstructures is formed by each of the microjunctions Constructed at the interface between the body and the concave space, and the arcuate height of any of the microstructures at the interface is denoted H, and the curved surface of any of the microstructures at the interface The width is expressed as W, where 0.01 mm ≦ H ≦ 0.2 mm, and 0.01 mm ≦ W ≦ 0.8 mm.

In one embodiment, the arc of each of the microstructures is defined by an interface of each of the microstructures between the body and the concave space, and any of the microstructured arcs at the interface The ratio of the face height H divided by the arcuate width W of any of the microstructures is expressed as R, where 0.003 ≦ R ≦ 1.2.

In one embodiment, the microstructures are a plurality of concentric circles from the concave space.

In one embodiment, the microstructures are latticed.

In an embodiment, the microstructures are regularly arranged or irregularly arranged on the light incident surface.

In one embodiment, the concave space has an opening defined by the plane of the opening rim as a reference plane, and any of the microstructures at the same height position relative to the reference plane has the same geometry.

In an embodiment, the concave space has an opening defined by a geometric center of the opening edge as a reference plane through a plane of the opening edge to pass the reference point and perpendicular to the reference surface A straight line is defined as a reference axis, and a plane passing through the reference axis is defined as a cross section, and the light incident surface is divided by the reference axis to form a first area and a second area, and the first area is included in the first area The microstructures are distributed to form a microstructure distribution section, and an end of the two ends of the microstructure distribution section that is closer to the reference axis is defined as the first endpoint, and the first endpoint is connected to the reference point. Forming the distribution angle of the microstructures with the reference plane θ, where 20 degrees ≦ θ ≦ 90 degrees.

In one embodiment, 20 degrees ≦ θ ≦ 60 degrees.

In one embodiment, an end of the two ends of the microstructure distribution section that is further away from the reference axis is defined as a second end point, and the distance of the second end point along the direction of the reference axis to the reference plane is defined. For H _L , where 0 mm ≦ H _L ≦ 5 mm.

In an embodiment, the concave space has an opening defined by a geometric center of the opening edge as a reference plane through a plane of the opening edge to pass the reference point and perpendicular to the reference surface A straight line is defined as a reference axis, and a plane passing through the reference axis is defined as a cross section, and the light incident surface is divided by the reference axis to form a first area and a second area, and the first area is included in the first area The microstructures are distributed to form a microstructure distribution section, and the line connecting the first and last ends of the microstructure distribution section forms an inclination angle α of the microstructures with the reference plane, wherein 10 degrees ≦α≦80 degrees.

In one embodiment, 30 degrees ≦ α ≦ 60 degrees.

In an embodiment, the concave space has an opening defined by a geometric center of the opening edge as a reference plane through a plane of the opening edge to pass the reference point and perpendicular to the reference surface The straight line is defined as a reference axis having a flat portion at the intersection of the reference axis and the light exiting surface.

In an embodiment, the flat portion is a smooth surface.

In one embodiment, the light incident surface has a concave region adjacent to the annular region, and the intersection of the annular region and the concave region forms a turn, the annular region being closer to the bottom of the body than the concave region. The concave region is formed by the body recess.

In an embodiment, the concave region is formed at the intersection with the annular region a first opening, and the annular region forms a second opening away from the concave region, wherein the second opening of the annular region is larger than the first opening of the concave region.

In one embodiment, the light incident surface has a concave region adjacent to the annular region, and the concave region is a smooth surface, and the annular region is closer to the bottom of the body than the concave region, the concave region is The body is formed by being recessed.

In an embodiment, the light incident surface has a concave area adjacent to the annular area, and the concave area is an atomizing surface, and the annular area is closer to the bottom of the body than the concave area, and the concave area is Formed by the body recess.

In an embodiment, the concave space has an opening defined by a plane defined by the opening edge as a reference surface, the opening edge of the concave space has a diameter D _I , and the height of the light incident surface is H _I , wherein 0.2 ≦ H _I / D _I ≦ 3, the height H _{I of} the light incident surface is the maximum value of the distance from any point on the light incident surface along the direction perpendicular to the reference surface to the reference surface.

In an embodiment, the concave space has an opening defined by a plane defined by the opening edge as a reference surface, the opening edge of the concave space has a diameter D _I , and the height of the light incident surface is H _I , wherein 0.2 ≦ H _I / D _I ≦ 3, the height H _{I of} the light incident surface is the maximum value of the distance from any point on the light incident surface along the direction perpendicular to the reference surface to the reference surface.

In one embodiment, wherein 0.2 ≦H _I /D _I ≦ 0.8.

In one embodiment, the bottom of the body has a bottom surface extending outward from the bottom edge of the light incident surface and directly or indirectly connected to the light exit surface, the outer edge of the bottom surface having a diameter D _O , the light output The height of the surface is H _O , where 0.2 ≦ H _O /D _O ≦ 0.8, and the height H _{O of} the light-emitting surface is the maximum value of the distance from any point on the light-emitting surface along the direction perpendicular to the reference surface to the reference surface.

In an embodiment, the concave space has an opening such that a plane passing through the opening edge is a reference surface, and the opening edge of the concave space is non-circular, with two points farthest from the opening edge The direction of the connection is a first direction, and the maximum distance of the two sides of the opening edge in the first direction is a first direction width D ₁ , and the first direction is a second direction perpendicular to the first direction. The maximum distance between the two sides of the opening edge in the two directions is the width D _{2 of} the opening edge in the second direction, and the height of the light incident surface is H _I , where 0.2 ≦H _I /D ₁ ≦3, 0.2≦H _I / D ₂ ≦ 3, the height H _{I of} the light incident surface is the maximum value of the distance from any point on the light incident surface along the direction perpendicular to the reference plane to the reference plane.

In an embodiment, the outer surface of the body comprises a reflecting surface, the bottom edge of the reflecting surface is adjacent to the outer edge of the bottom of the body, and the top edge of the reflecting surface is directly or indirectly connected to the outer edge of the light emitting surface. connection.

In one embodiment, the light incident surface has one of a concave region, a convex region or a flat region adjacent to the annular region, the annular region being more planar than the concave region, the convex region or the flat region The region is adjacent to the bottom of the body, and the concave region is formed by the body recess.

In an embodiment, the material of the body is a transparent material.

In an embodiment, the illumination device comprises an optical component and a light emitting diode, the light emitting surface of the light emitting diode facing the light incident surface of the optical component. In one embodiment, the light emitting diode system is a polycrystalline light emitting diode.

In one embodiment, the illumination device includes an optical component, a light source, and a diffuser plate disposed outside the light exiting surface of the optical component for light incident from the light exiting surface to be incident.

Based on the above, by the design of the optical element of the present invention and the illumination device having the same, the following effects can be produced:

1. The light emitted by the light-emitting diode can be broken up by the microstructure on the light-emitting surface and re-mixed, thereby reducing the yellow circle phenomenon.

2. The present invention disperses and mixes the yellowish light through the microstructure, and the yellowish light can still be projected to the target projection area without wasting, so the present invention can reduce the yellow circle phenomenon in addition to the present invention. Improve light utilization.

3. When the optical element of the present invention is applied to a plurality of backlight modules, it is possible to avoid directing these yellowish lights directly to affect the spot of the target projection area of the other optical elements. These yellowish light directly projects light spots that may affect the target projection area of other optical components, which may cause problems in the chromaticity of the spot.

4. By these microstructures, the light emitted from both sides of the light-emitting diode can be dissipated and it is less easy to directly pass through the center of the top of the light-emitting surface, thereby reducing the problem of the central bright spot.

20‧‧‧Lighting device

100‧‧‧Backlight lens

102‧‧‧Lighting holes

The lower half of 103‧‧

104‧‧‧Single surface

105‧‧‧Light

106‧‧‧LED

108‧‧‧ concave

110‧‧‧ top

200a, 200b, 200c, 200d‧‧‧ optical components

202‧‧‧Ontology

204‧‧‧ light surface

206‧‧‧Lighting surface

208‧‧‧ bottom

210‧‧‧ concave space

212‧‧‧Microstructure

213‧‧‧ interface

214‧‧‧ curved surface

215‧‧‧ turning

216‧‧‧ outer surface

217‧‧‧step surface

218‧‧‧step surface

220‧‧‧ openings

222‧‧‧Open mouth

224‧‧‧Microstructure distribution section

226‧‧‧ Flat

228‧‧‧ring area

230‧‧‧ concave area

232‧‧‧first opening

234‧‧‧second opening

236‧‧‧ convex area

238‧‧‧flat area

302‧‧‧Light source

302a‧‧‧Lighting diode

304‧‧‧Diffuser

306‧‧‧Circuit board

400‧‧‧reflecting surface

61‧‧‧First direction

62‧‧‧second direction

A‧‧‧reference axis

B‧‧‧ datum

D ₁ ‧‧‧first direction width

D _I ‧‧‧diameter

D ₂ ‧‧‧second direction width

D _O ‧‧‧diameter

H‧‧‧Arc height

H _I ‧‧‧ Height

H _L ‧‧‧Distance

H _O ‧‧‧ Height

H _P ‧‧‧Distance

Lw1‧‧‧Light

Lw2‧‧‧Light

Lw3‧‧‧Light

Ly‧‧‧Light

Ly1‧‧‧Light

Ly2‧‧‧Light

Ly3‧‧‧Light

O‧‧‧ benchmark

P1‧‧‧ first endpoint

P2‧‧‧ second endpoint

P3‧‧‧ intersection

R1‧‧‧ first area

R2‧‧‧ second area

S‧‧‧ section

W‧‧‧Arc width

‧‧‧‧ tilt angle

‧‧‧‧角角

Θ‧‧‧ distribution angle

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other figures may also be obtained from these figures for those of ordinary skill in the art to which the invention pertains.

Fig. 1 is a cross-sectional view of a backlight lens of the prior art.

Fig. 2 is a cross-sectional view showing a lighting device in accordance with an embodiment of the present invention.

Fig. 3 is a perspective view showing the optical element in Fig. 2.

Fig. 4 is a partial perspective view showing the optical element of Fig. 2.

Fig. 5 is a partially enlarged view showing Fig. 2;

Fig. 6 is a bottom view showing the optical element in Fig. 2.

FIG. 7A is a schematic view showing an optical path according to an embodiment of the present invention.

Fig. 7B is a partially enlarged view showing Fig. 7A.

Figure 8 is a cross-sectional view showing an optical element according to a second embodiment of the present invention.

Figure 9 is a cross-sectional view showing an optical element according to still another embodiment of the present invention.

Figure 10 is a cross-sectional view showing an optical element according to another embodiment of the present invention.

Figure 11 is a schematic view showing the design parameters of the optical element in Figure 10.

Fig. 12 is a light distribution graph of the optical element in Fig. 10.

Fig. 13 is an illuminance diagram of the optical element in Fig. 10.

Figure 14 is a cross-sectional view showing an optical element according to still another embodiment of the present invention.

Fig. 15 is a schematic view showing the concave opening of the optical element in Fig. 14.

Figure 16 is a cross-sectional view showing an optical element according to still another embodiment of the present invention.

Figure 17 is a cross-sectional view showing an optical element according to a second embodiment of the present invention.

Figure 18 is a cross-sectional view showing an optical element according to another embodiment of the present invention.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the drawings in the embodiments of the present invention. However, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. In addition, the same or similar elements are used in the different drawings or in different embodiments for the purpose of illustration or understanding of the invention.

Referring to FIGS. 2 to 4, FIG. 2 is a cross-sectional view of the illumination device 20 according to an embodiment of the present invention. Fig. 3 is a schematic perspective view showing the optical element 200a in Fig. 2. Fig. 4 is a partial perspective side view showing the optical element 200a in Fig. 2. As shown in FIGS. 2 through 4, in an embodiment, the illumination device 20 includes an optical element 200a and a light source 302, wherein the optical element 200a is often referred to as a lens, and the light source 302 is, for example, a light emitting diode 302a, an optical element. 200a includes a body 202, a light incident surface 204, and a light exit surface 206. The light emitting surface of the light emitting diode 302a faces the light incident surface 204 of the optical element 200a, and in this embodiment, the light emitted by the light emitting diode 302a is centered. White, the light on the left and right sides is yellowish. In an embodiment, the material of the body 202 is a transparent material. The material of the body 202 is, for example, a group selected from the group consisting of polymethyl methacrylate (PMMA), polycarbonate (PC), silicone, and glass. A concave space 210 is formed from the bottom of the body 202, which in an embodiment is similar to the shape of a bell. The light incident surface 204 is defined by the concave space 210 of the body 202. In other words, a concave space 210 is formed from the bottom of the body 202, and an inner wall surface of the concave space 210 forms the light incident surface 204. The light incident surface 204 is incident on the light, and the light incident surface 204 has an annular region 228, wherein the light incident surface 204 is provided with a plurality of microstructures 212 at least on the annular region 228, each microstructure 212 having a curved surface 214, In one embodiment, the curved surface 214 is part of a circular arc. In other words, the light incident surface 204 may be provided with a plurality of microstructures 212 in the annular region 228, and may be provided with microstructures in other regions, such as the light incident surface 204 shown in FIG. As shown in FIG. 2, the light exit surface 206 is formed on the outer surface 216 of the body 202 with the bottom edge of the outer surface 216 abutting the outer edge of the bottom of the body 202. In this embodiment, the outer surface 216 also includes a stepped surface 217 that interfaces with the light exit surface 206. In addition, the light incident surface 204 and the light exit surface 206 of the optical component of the present invention have other aspects, which will be described later.

Please refer to FIG. 2, FIG. 4 and FIG. 5, wherein FIG. 5 is a partial enlarged view of FIG. As shown, in one embodiment, each microstructure 212 can be formed by the body 202 being recessed or convex toward the concave space 210. In the embodiment illustrated in FIG. 2, the microstructures 212 are formed by the body 202 being recessed toward the concave space 210. The arcuate surface 214 of each microstructure 212 is defined by the interface 213 of each microstructure 212 between the body 202 and the concave space 210, and the arc height of any of the microstructures 212 at the interface 213 is expressed as H, the arcuate width of any of the microstructures 212 at the interface 213 is expressed as W, and H and W can be any size, with 0.01 mm ≦ H ≦ 0.2 mm being preferred. In a preferred embodiment, 0.01 mm ≦ W ≦ 0.8 mm. In another preferred embodiment, the ratio of the arcuate height H of any of the microstructures 212 of the interface 213 divided by the arcuate width W of any of the microstructures 212 is expressed as R, of which 0.003≦R≦ is preferred. 1.2.

Please refer to FIG. 2 and FIG. 6 , wherein FIG. 6 is a bottom view of the optical element 200 a in FIG. 2 . As shown in FIG. 6 , the microstructures 212 can be viewed from the concave space 210 . A plurality of concentric shapes. In addition, the microstructures 212 may be, for example, a lattice shape, and the lattice shape may be, for example, a quadrangular lattice shape as shown in FIG. 2, but is not limited thereto, and may also be a triangular lattice shape or a pentagon lattice pattern. Shape, hexagonal pattern or other polygons. The microstructures 212 may be arranged on the light incident surface 204, for example, as shown in FIG. 2, but are not limited thereto, and may be irregularly arranged. The advantage of the regular arrangement is that a uniform spot is more likely to be generated. The microstructure 212 can be, for example, a concave lens microstructure as shown in FIG. 2, but can also be composed of a convex lens microstructure. In addition, as shown in FIG. 2, in an embodiment, the concave space 210 has an opening 220 defined by the plane of the opening lip 222 as the reference plane B, and any position at the same height position relative to the reference plane B. Structure 212 has the same geometry.

It should be noted that although the conventional atomizing surface also has a microstructure, The microstructures 212 of the invention are different. The microstructure 212 of the present invention has a curved surface 214, and the curved surface 214 can be clearly identified by an instrument such as a naked eye or a magnifying glass. In addition, the microstructure 212 of the present invention is capable of controlling the geometry at the beginning of the design, as shown in FIG. 5. In this embodiment, the curved surface 214 is a part of a circular arc and can be accurately drawn by the drawing software at the time of design. The radius of curvature, the height of the arc, the width or the distance between adjacent microstructures 212 or a plurality of concentric shapes, lattices, and the like, and these geometric structures may affect the refraction or reflection of light. In addition, optical simulation software can be used to simulate the optical effects. However, the microstructure of the atomized surface cannot be clearly identified by a naked eye or a magnifying glass. The microstructure of the atomized surface is a roughened surface. Although it can be controlled by processing to reduce the degree of roughening, It is impossible to determine the geometry of each microstructure accurately with the drawing software at the beginning of the design, so it is also inconvenient in optical design. In addition, in general, a smooth surface is not efficient because it is not provided with a microstructure, but the light is not dissipated (homogenized). In contrast, the microstructure 212 of the light incident surface 204 of the present invention and the conventional atomizing surface are both The light can be broken up to achieve the effect of homogenization. However, the microstructure 212 of the present invention can be precisely controlled by the drawing software by having the curved surface 214, so that compared with the conventional smooth surface and the atomized surface, It is easy to balance the need for homogenization with the need for light efficiency to meet design goals.

In addition, the microstructure referred to in the present invention is a relative concept, that is, the microstructure 212 of the present invention is minute compared to the body 202. Specifically, as shown in FIGS. 2 and 5, the microstructure 212 The ratio W/D _O of the arcuate width W to the diameter D _O of the outer edge of the bottom surface 208 of the body 202 is between 0.0001 and 0.14.

Referring to FIG. 2, FIG. 7A and FIG. 7B, FIG. 7A is a schematic view showing an optical path according to an embodiment of the present invention, and FIG. 7B is a partially enlarged view showing FIG. 7A. In this In the embodiment, the light emitted from the light-incident surface 204, the light-emitting surface 206, and the light-emitting diode 302a is substantially bilaterally symmetric with respect to the reference axis A. Therefore, FIGS. 7A and 7B only show the left side region of the reference axis A (also That is, the optical path of the first region R1) is indicated. As shown in FIG. 7A and FIG. 7B, at least a plurality of microstructures 212 are disposed on the annular region 228 by the light incident surface 204. Each of the microstructures 212 has a curved surface 214 and the light emitted by the LEDs 302a. The microstructures 212 can be broken up and the light can be re-mixed, thereby achieving the effect of uniformizing the light. Specifically, the microstructures 212 can emit yellow light from both sides of the light-emitting diode 302a. The yellowish light rays Ly1, Ly2, and Ly3 which are scattered and then scattered are mixed with the white light Lw1, Lw2, and Lw3 emitted from the center of the light emitting diode 302a at the diffusion plate 304, respectively, to be neutralized, thereby Reduce the yellow circle phenomenon. This method of reducing the yellow circle phenomenon is different from the conventional method. The conventional backlight lens is used to project the yellow light directly in the direction other than the target projection area through the lower half of the light-emitting hole, and is wasted, but The method of the present invention is to disperse the yellowish light Ly through the microstructure 212 and then mix the light, and the yellowish lights Ly1, Ly2, Ly3 can still be projected to the target projection area without wasting, so the present invention can be omitted. In addition to reducing the yellow circle phenomenon, it can also improve light utilization. Therefore, when the optical element 200a of the present invention is applied to a plurality of backlight modules, it is possible to avoid directing these yellowish lights directly to affect the spot of the target projection area of other optical elements (the yellowish lights are directly outward). Projecting a spot that may affect the target projection area of other optical components, causing a problem of uneven chromaticity of its spot). In addition, by using the microstructures 212, the light emitted from both sides of the light-emitting diode 302a can be dissipated and it is less easy to directly pass through the center of the top of the light-emitting surface, thereby improving the problem of the central bright spot. In contrast, the backlight lens of the prior art has a state in which the lower half of the light-emitting aperture is in a straight state, so that it is easier to reflect light and pass through the center of the top of the light-emitting surface to cause a central bright spot.

As shown in FIG. 2, in an embodiment, the concave space 210 has an opening 220. The geometric center of the opening rim 222 is defined as the reference point O, and the plane passing through the opening rim 222 is defined as the reference plane B, and the straight line passing through the reference point O and the vertical reference plane B is defined as the reference axis A to pass the reference axis. A plane of A is defined as a section S, which is divided into a light surface 204 by a reference axis A on the section S to form a first region R1 and a second region R2. As shown in FIG. 2 and FIG. 6, in this embodiment, the opening edge 222 of the optical element 200a is circular, the reference point O is the center of the circle, and the reference axis A is the light incident surface 204 and the light exit surface 206. The axes of symmetry, and the microstructures 212 are distributed around the reference axis A on the annular region 228 of the light incident surface 204, and further the reference axis A extends through the center of the light exit surface 206. In addition, the bottom surface of the light-emitting diode 302a is flush with the bottom surface 208 of the body 202.

As shown in FIGS. 2 and 5, in an embodiment, a microstructure distribution section 224 is formed in the first region R1 having the distribution of the microstructures 212, and both ends of the microstructure distribution section 224 are formed. An end closer to the reference axis A is defined as a first end point P1, and a line connecting the first end point P1 and the reference point O forms a distribution angle θ of the microstructures 212 with the reference plane B. In one embodiment, 20 degrees ≦ θ ≦ 90 degrees. In a preferred embodiment, 20 degrees ≦ θ ≦ 60 degrees, and in the preferred embodiment of Fig. 2, θ = 42 degrees. In the optical element 200a of the present invention, appropriately adjusting the distribution angle θ can effectively eliminate the yellow circle phenomenon. As shown in the optical path diagrams of FIGS. 7A and 7B, since the light-emitting diode 302a is whitened at the center of the yellow light emitted from both sides, the yellow light on both sides causes a yellow circle phenomenon, and the present invention The microstructure 212 is mainly for the yellowish light Ly, which is broken up to homogenize, but under certain conditions, if the distribution angle θ of the microstructure 212 is too large, the central whitening will be broken. The light rays Lw1, Lw2, and Lw3 may lower the light efficiency at the center, and therefore, the size of the distribution angle θ is particularly controlled in optical design.

As shown in FIG. 2, in one embodiment, one of the two ends of the microstructure distribution section 224 that is further away from the reference axis A is defined as the second end point P2, and the second end point P2 is along the direction of the reference axis A. The distance to the reference plane B is defined as H _L , where 0 mm ≦ H _L ≦ 5 mm. In the embodiment of Fig. 2, H _L is about 0.65 mm, and the thickness of the light-emitting diode 302 is approximately equal to H _L . In other words, the light emitting diode 302a can be accommodated in the concave space 210, and the portion of the light incident surface 204 adjacent to the left and right sides of the light emitting diode 302a is a smooth surface, but not limited thereto, and can also be an atomizing surface. .

As shown in FIGS. 2 and 5, in an embodiment, a microstructure distribution section 224 is formed in the first region R1 with the distribution of the microstructures 212, and the microstructure distribution section 224 is at the ends of the first and second ends. The line and the reference plane B form the inclination angle α of the microstructures 212, that is, the angle formed by the line connecting the ends of the microstructure distribution section 224 and the reference plane B is an inclination angle α. In an embodiment, 10 Degree ≦α≦80 degrees. Referring to FIG. 8 together, if the tilt angle α is increased to more than 80 degrees, the rays Ly1, Ly2, and Ly3 scattered by the microstructure 212 are shifted away from the reference axis A, and are scattered to the sides. Out, become stray light and reduce light utilization. In one embodiment, 30 degrees ≦α ≦ 60 degrees, since the light rays Ly from the left and right sides of the light-emitting diode 302a are yellowish, and the tilt angle α is in the range of 30 degrees to 60 degrees, the microstructures 212 It can play a relatively direct role in the yellowish light Ly, that is to say, in the optical design, the yellowish light emitted from the left and right sides of the light emitting diode 302a and the light emitted closer to the center are mixed with each other. It will be easier, which will help reduce the yellow circle phenomenon. In the preferred embodiment of Fig. 2, the microstructures 212 have an angle of inclination a of about 44 degrees.

As shown in Figures 2 and 4, in this embodiment, the light incident surface 204 has an annular region 228 positioned in the lower half and a concave region 230 adjacent the annular region 228 and located in the upper half, the annular region 228 being more The concave region 230 is adjacent to the bottom of the body 202, and the concave region 230 is formed by the recess of the body 202. In other words, the concave space 210 is surrounded by the annular region 228 and the concave region 230. In an embodiment, the intersection of the annular region 228 and the concave region 230 forms a turning point. 215, but it is also possible to form a transition, as in the embodiment shown in FIG. As shown in FIGS. 2 and 4, in particular, the concave region 230 forms a first opening 232 at the intersection with the annular region 228, and the annular region 228 forms a second opening 234 away from the concave region 230. The second opening 234 of the annular region 228 is larger than the first opening 232 of the concave region 230. The advantage of forming the turn 215 at the intersection of the annular region 228 and the concave region 230 is that the two regions of the light incident surface 206 can be separately designed, and the two portions can be made more flexible for the two portions. Adjustments, which in turn allow the two parts of the light to be mixed to meet the design goals. The second opening 234 of the annular region 228 is larger than the first opening 232 of the concave region 230. The tilt angle a of the microstructures 212 can be easily designed to be 30 degrees ≦α ≦ 60 degrees. As shown in Figures 2 and 4, in this embodiment, the concave region 230 is a smooth surface, however, the concave region 230 may also be an atomizing surface as described below.

Referring to FIG. 10, FIG. 10 is a cross-sectional view of an optical element 200b having an annular region 228 and a concave region 230 adjoining the annular region 228, and an annular region 228, in accordance with another embodiment of the present invention. These microstructures 212 are provided, the concave region 230 being an atomizing surface, the annular region 228 being closer to the bottom of the body 202 than the concave region 230, and the concave region 230 being formed by the body 202 being recessed, and in this embodiment, a ring The microstructures 212 on the region 228 are also atomized. The light incident surface 204 is not limited thereto, and a plurality of microstructures 212 may be provided in both the annular region 228 and the concave region 230 as shown in FIG. As shown in FIG. 2, in an embodiment, the opening edge 222 of the concave space 210 has a diameter D _I , and the height of the light incident surface 204 is H _I , wherein 0.2 ≦H _I /D _I ≦3, into the light. The height H _I of the surface 204 is the maximum value of the distance from the point of the vertical reference plane B to the reference plane B at any point on the light incident surface 204. In one embodiment, 0.2 ≦H _I /D _I ≦ 0.8, specifically H _I /D _I is about 0.56 in the embodiment of Fig. 2, and in the embodiment of Fig. 10, H _I /D _{I is} about It is 0.69. The ratio of H _I /D _I affects the shape of the concave space 210. When H _I /D _{I is} greater than 1, the concave space 210 tends to be sharp, and when H _I /D _{I is} less than 1, the concave space 210 tends to Flat. The backlight lens of the prior art has a larger H _I /D _I than 1 and tends to be pointed, which facilitates designing the lower half of its illuminating aperture to a straight state, but in the second and tenth embodiments of the present invention. In the illustrated embodiment, H _I /D _{I is} designed to be less than one, so that the inclination of the annular region 228 is relatively gentle, and the inclination angle α of the microstructures 212 is reduced, so that the light can be prevented from being directly discharged to both sides. In turn, the light utilization rate can be increased.

As shown in FIG. 2 and FIG. 4, in an embodiment, the bottom of the body 202 has a bottom surface 208 extending outward from the bottom edge of the light incident surface 204 and directly or indirectly connected to the light exit surface 206. In the embodiment illustrated in Figures 2 through 4, the bottom surface 208 is indirectly coupled to the light exit surface 206 through a stepped surface 217. In other words, in this embodiment, the outer surface 216 includes a light exit surface 206. And the step surface 217, it can also be said that the body 202 is surrounded by the outer surface 216, the bottom surface 208 and the light incident surface 204. In the embodiment of Fig. 2, the stepped surface 217 has a nearly vertical transition. As shown in FIG. 2, the outer edge of the bottom surface 208 has a diameter D _O , the height of the light-emitting surface 206 is H _O , where 0.2 ≦ H _O /D _O ≦ 0.8, and the height H _O of the light-emitting surface 206 is any point on the light-emitting surface 206. The maximum value of the distance along the direction of the vertical reference plane B to the reference plane B. As shown in FIG. 2, such an optical element 200a is flat, and is suitable for applications such as backlight modules, advertising billboards, flat lamps, and street lamps that require a large illumination angle.

As shown in FIG. 2, in one embodiment, the light exit surface 206 has a flat portion 226 at the intersection of the reference axis A and the light exit surface 206. In one embodiment, the angle β formed by the line connecting the reference point O to any point on the flat portion 226 of the light-emitting surface 206 to the reference axis A is expressed as the coverage angle of the flat portion 226, where 0 degrees ≦ β ≦ 20 degrees. In an embodiment, the flat portion 226 of the light exit surface 206 corresponds to the light incident surface 204. Since the light incident surface 204 is provided with at least a plurality of microstructures 212 in at least the annular region 228, the central bright spot can be reduced, so that the light exit surface 206 can have a flat portion 226 It is not necessary to form a concave surface, so that the manufacturing process of the optical element 200a can be effectively simplified and the production cost can be reduced. In an embodiment, the flat portion 226 can be, for example, a smooth surface. Further, as in the embodiment shown in FIG. 2, the light-emitting surface 206 can be, for example, a smooth surface, such that the entire light-emitting surface 206 is not provided with any micro-- Structure, this will further simplify the process.

Referring again to FIG. 10, the optical component 200b shown in FIG. 10 is mainly different from the optical component 200a shown in FIG. 2 in that the annular region 228 and the concave region 230 of the optical component 200b are atomized. However, the optical element 200a is absent, and the concave space 210 of the optical element 200b is relatively pointed, and the optical element 200a is relatively flat. The design parameters of the optical element 200b of FIG. 10 are detailed below. Since the design parameters of the optical element 200b and the optical element 200a are defined in the same manner, please refer to FIG. 2 and FIG. 5 together, and the microstructure of the optical element 200b is 212 arc. The width W of the surface is about 0.30 mm, the height H of the microstructure 212 is about 0.04 mm, and the radius of curvature of the curved surface of the microstructure 212 is about 0.31 (in this embodiment, the curvature radius of each of the microstructures 212 is the same, but not This limit may also be different. The distribution angle θ of the microstructures 212 is about 42 degrees, the inclination angle α of the microstructures 212 is about 47 degrees, the H _L is about 0.56 mm, and the opening edge 222 of the concave space 210 is diameter. D _I is about 5.76 mm, the height H _I of the light-incident surface 204 is about 3.96 mm, the diameter D _O of the outer edge of the bottom surface 208 is about 21.06 mm, and the height H _O of the light-emitting surface 206 is about 5.34 mm. The aforementioned range of relevant values. In addition, the light-emitting surface 206 of the optical element 200b also has a flat portion 226 at the intersection with the reference axis A, and the microstructures 212 are also arranged in a plurality of concentric circles.

Please refer to FIG. 10 and FIG. 11, wherein FIG. 11 is a schematic diagram showing design parameters of the optical element 200b of FIG. In the embodiment of FIG. 10, both the light incident surface 204 and the light exiting surface 206 form a rotational symmetry with the reference axis A as a rotational symmetry axis, and also form a left-right symmetry with the reference axis A as the symmetry axis, with the reference plane B and the cross section. The straight line intersecting with S is the constant angle coordinate system The X axis, the reference axis A is the Y axis of the rectangular coordinate system, and the second region R2 is the first quadrant of the rectangular coordinate system, and the first region R1 is the second quadrant of the rectangular coordinate system, wherein the first quadrant The X coordinate and the Y coordinate are both positive values, the X coordinate of the second quadrant is a negative value, and the Y coordinate is a positive value, and the points having the following coordinates are included on the light incident surface 204: (0, 3.96), (0.48, 3.86) ), (0.99, 3.48), (1.48, 2.85), (1.74, 2.21), (1.84, 1.63), (2.12, 1.43), (2.35, 1.22), (2.55, 0.99), (2.73, 0.74), (2.84, 0.56); points on the light-emitting surface 206 containing the following coordinates: (0, 5.34), (-3.22, 5.18), (-4.42, 4.90), (-5.56, 4.42), (-6.62, 3.73) ), (-7.54, 2.86), (-8.14, 2.13), (-8.61, 1.30).

Referring to Fig. 12 and Fig. 13, Fig. 12 is a light distribution graph of the optical element 200b of Fig. 10, and Fig. 13 is an illuminance diagram of the optical element 200b of Fig. 10. According to the light distribution graph of FIG. 12, it can be seen that the light-emitting angle of the optical element 200b of the present invention can conform to an application field requiring a large light-emitting angle such as a backlight module, an advertising billboard, or a panel light. As is apparent from the illuminance map of Fig. 13, it is understood that the optical element 200b of the present invention can generate light having a uniform illuminance distribution.

As shown in FIG. 2, in an embodiment, the illumination device includes an optical element 200a, a light emitting diode 302a, and a circuit board 306. The light emitting surface of the light emitting diode 302a faces the light incident surface 204 of the optical element 200a. The optical element 200a and the light emitting diode 302a may be disposed on the top surface of the circuit board 306. It may be said that the bottom surface 208 of the optical element 200a, the bottom surface of the light emitting diode 302a, and the top surface of the circuit board are all flush with the reference plane B. level. The reference axis A passes through the geometric center of the bottom surface of the light-emitting diode 302a and is perpendicular to the bottom surface of the light-emitting diode 302a. The light emitting diode 302a may be a single crystal or a polycrystalline light emitting diode. It is worth mentioning that due to the increasing popularity of high-brightness requirements, there are more and more polycrystalline LEDs on the market, but when using polycrystalline LEDs, wafer imaging problems are more likely to occur. Also more serious, however, the present invention is in the annular region 228 of the light incident surface 204. The microstructure 212 is provided to disperse and homogenize the light of the LED 230a. In addition to reducing the yellow circle phenomenon, the problem of wafer imaging can be effectively reduced.

In one embodiment, the illumination device 20 includes an optical element 200a, a light source 302, and a diffuser plate 304 disposed outside the light exit surface 206 of the optical element 200a for light incident from the light exit surface 206 to be incident. The distance from the intersection P3 of the diffuser plate 302 to the reference axis A to the reference plane B is H _P , where 15 mm ≦ H _P ≦ 500 mm, in this embodiment, H _P = 45 mm. The illuminating device 20 can be applied to the fields of a backlight module, an advertising kanban or a flat panel lamp, that is, in such an application field, the illuminating device 20 can be used as a backlight. It is worth mentioning that in such applications, in addition to the need for uniformity in brightness and chromaticity, thinning is also a market trend, so a large illuminating angle is also required, and the light incident surface 204 of the present invention has a microstructure. 212 can break up the light, so it just meets these needs.

Referring to FIG. 14 and FIG. 15, FIG. 14 is a cross-sectional view showing an optical element 200c according to still another embodiment of the present invention, and FIG. 15 is a view showing a concave space 210 of the optical element 200c in FIG. A schematic view of the opening rim 222. In the embodiment shown in Fig. 14, the definitions of the heights H _I of the reference axis A, the reference plane B, and the light incident surface 204 are similar to those of the embodiment shown in Fig. 2. That is, the concave space 210 of the optical element 200c has an opening 220 defined by the geometric center of the opening rim 222 as a reference point O to be defined as a reference plane B through the plane of the opening rim 222 to pass the reference point O and be vertical The straight line of the reference plane B is defined as the reference axis A, and the height H _I of the light incident surface 204 is the maximum value of the distance from the direction of the vertical reference plane B to the reference plane B at any point on the light incident surface 204. As shown in the figure, the optical element 200c of FIG. 14 is similar to the optical element 200a of FIG. 2, but the light-emitting surface 206 of the optical element 200c is asymmetric with respect to the reference axis A, and the opening edge 222 of the concave space 210 of the optical element 200c is Non-circular, but elliptical as shown in Figure 15. Such an optical element 200c can be applied to a street light, so it is often referred to as a street light lens. More specifically, the direction of the line connecting the two points farthest apart on the opening edge 222 is a first direction 61, and the maximum distance between the sides of the opening edge 222 in the first direction 61 is the width of the first direction. D ₁ , the first direction is a second direction 62, and the maximum distance between the sides of the opening 222 in the second direction 62 is the width D ₂ of the opening 222 in the second direction, wherein 0.2 ≦H _I / D ₁ ≦ 3, 0.2 ≦ H _I / D ₂ ≦ 3. Referring to Fig. 16, there is shown a cross-sectional view of an optical element 200d according to still another embodiment of the present invention. The light incident surface 204 of the optical element 200d of Fig. 16 is similar to the light incident surface 204 of the optical element 200a of Fig. 2, and the difference between the optical elements 200d and 200a is that the light exit surface 208 of the optical element 200d is flat, and further, optical The outer surface 216 of the component 200d further includes a reflective surface 400. The bottom edge of the reflective surface 400 is adjacent to the outer edge of the bottom of the body 202, and the top edge of the reflective surface 400 is directly or indirectly connected to the outer edge of the light exit surface 206. In the embodiment of Fig. 16, the top edge of the reflective surface 400 is indirectly connected to the light exit surface 206 through a stepped surface 218, and the stepped surface 218 forms a near right angle turn. In this embodiment, the optical element 200d has a cup shape. In an embodiment, the reflective surface 400d can be, for example, a total reflection surface or a reflective layer, and the light can be reflected to the light exit surface 206. The optical element 200d allows light to be concentrated, and can be applied to a cup lamp or a projection lamp, and is therefore often referred to as a cup lamp lens.

There are other embodiments of the light incident surface 204. Referring to Figures 17 and 18 together, as shown, the light incident surface 204 has an annular region 228 and a concave region adjacent the annular region 228. 230, one of the convex region 236 or the flat region 238, and the annular region 228 is provided with the microstructures 212, the annular region 228 is closer to the bottom of the body 202 than the concave region 230, the convex region or the flat region, the concave region The 230 series is formed by recessing the body 202. In other words, the annular region 228 of the light incident surface 204 is not limited to being contiguous with the concave region 223, but may be contiguous with the convex region 236 (as shown in Figure 17) or the flat region 238 (shown in Figure 18).

Briefly, the present invention provides an optical component and an illumination device having the same, which is provided with a plurality of microstructures having a curved surface at least on an annular region of the light incident surface to eliminate yellow circles and improve light utilization. Rate and solve the problem of the center highlights.

While the invention has been described above in terms of the preferred embodiments, the invention is not intended to limit the scope of the invention, and the invention may be practiced without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

20‧‧‧Lighting device

200a‧‧‧Optical components

202‧‧‧Ontology

204‧‧‧ light surface

206‧‧‧Lighting surface

208‧‧‧ bottom

210‧‧‧ concave space

212‧‧‧Microstructure

214‧‧‧ curved surface

215‧‧‧ turning

216‧‧‧ outer surface

217‧‧‧step surface

220‧‧‧ openings

222‧‧‧Open mouth

226‧‧‧ Flat

228‧‧‧ring area

230‧‧‧ concave area

232‧‧‧first opening

234‧‧‧second opening

302‧‧‧Light source

302a‧‧‧Lighting diode

304‧‧‧Diffuser

306‧‧‧Circuit board

A‧‧‧reference axis

B‧‧‧ datum

D _I ‧‧‧diameter

D _O ‧‧‧diameter

H _I ‧‧‧ Height

H _L ‧‧‧Distance

H _O ‧‧‧ Height

H _P ‧‧‧Distance

O‧‧‧ benchmark

P1‧‧‧ first endpoint

P2‧‧‧ second endpoint

P3‧‧‧ intersection

R1‧‧‧ first area

R2‧‧‧ second area

S‧‧‧ section

‧‧‧‧角角

Θ‧‧‧ distribution angle

Claims (29)

An optical component comprising: a body defining a concave space from a bottom of the body; a light incident surface defined by the concave space of the body for incident light, and the light incident surface having an annular region Wherein the light incident surface is provided with a plurality of microstructures at least on the annular region, each of the microstructures having a curved surface; and a light exiting surface formed on an outer surface of the body, wherein a bottom edge of the outer surface is adjacent The outer edge of the bottom of the body. The optical component of claim 1, wherein each of the microstructures is formed by the body being recessed or convex toward the concave space. The optical component of claim 2, wherein the arcuate surface of each of the microstructures is defined by an interface of each of the microstructures between the body and the concave space, and at the interface The arcuate height of any of the microstructures is represented as H, and the arcuate width of any of the microstructures at the interface is expressed as W, where 0.01 mm ≦H ≦ 0.2 mm, and 0.01 mm ≦ W ≦ 0.8 Millimeter. The optical component of claim 2, wherein the arcuate surface of each of the microstructures is defined by an interface of each of the microstructures between the body and the concave space, and at the interface The ratio of the arcuate height H of any of the microstructures divided by the arcuate width W of any of the microstructures is expressed as R, where 0.003 ≦ R ≦ 1.2. The optical component of claim 1, wherein the microstructures have a plurality of concentric shapes from the concave space. The optical component of claim 1, wherein the microstructures are plaid shape. The optical component of claim 1, wherein the microstructures are regularly arranged or irregularly arranged on the light incident surface. The optical component of claim 1, wherein the concave space has an opening defined by a plane of the opening rim as a reference plane, and any of the microstructures at the same height position relative to the reference plane Have the same geometry. The optical element according to claim 1, wherein the concave space has an opening, and a geometric center of the opening edge is defined as a reference point, and a plane passing through the opening edge is defined as a reference surface to pass the A straight line of the reference point and perpendicular to the reference plane is defined as a reference axis, and a plane passing through the reference axis is defined as a section, and the light incident surface is divided by the reference axis to form a first area and a second area. Forming a microstructure distribution section in the first region having the microstructure distribution, an end of the two ends of the microstructure distribution section being closer to the reference axis is defined as the first end point, the first end A line connecting the point to the reference point forms a distribution angle θ of the microstructures with the reference plane, wherein 20 degrees ≦ θ ≦ 90 degrees. The optical component of claim 9, wherein 20 degrees ≦ θ ≦ 60 degrees. The optical component of claim 9, wherein an end of the two ends of the microstructure distribution section that is further away from the reference axis is defined as a second end point along the reference axis The distance from the direction to the reference plane is defined as H _L , where 0 mm ≦ H _L ≦ 5 mm. The optical element according to claim 1, wherein the concave space has an opening, and a geometric center of the opening edge is defined as a reference point, and a plane passing through the opening edge is defined as a reference surface to pass the A straight line of the reference point and perpendicular to the reference plane is defined as a reference axis, and a plane passing through the reference axis is defined as a section on which the light incident surface is divided by the reference axis Forming a first region and a second region, and forming a microstructure distribution portion in the first region having the microstructure distribution, the connection between the first and last ends of the microstructure distribution segment and the reference surface forming the The tilt angle α of some microstructures, where 10 degrees ≦α≦80 degrees. The optical component of claim 12, wherein 30 degrees ≦α ≦ 60 degrees. The optical element according to claim 1, wherein the concave space has an opening, and a geometric center of the opening edge is defined as a reference point, and a plane passing through the opening edge is defined as a reference surface to pass the A straight line of the reference point and perpendicular to the reference plane is defined as a reference axis, and the light exiting surface has a flat portion at a position where the reference axis intersects the light exiting surface. The optical component of claim 14, wherein the flat portion is a smooth surface. The optical component of claim 1, wherein the light incident surface has a concave region adjacent to the annular region, and the intersection of the annular region and the concave region forms a turn, the annular region being smaller than the concave portion The shaped region is adjacent to the bottom of the body, and the concave region is formed by the recess of the body. The optical component of claim 16, wherein the concave region forms a first opening at the intersection with the annular region, and the annular region forms a second opening away from the concave region. Wherein the second opening of the annular region is larger than the first opening of the concave region. The optical element according to any one of claims 1 to 15, wherein the light incident surface has a concave area adjacent to the annular area, and the concave area is a smooth surface, and the annular area is smaller than the concave area The shaped region is adjacent to the bottom of the body, and the concave region is formed by the recess of the body. The optical element according to any one of claims 1 to 15, wherein the light incident surface has a concave area adjacent to the annular area, and the concave area is an atomizing surface, and the annular area is The concave region is adjacent to the bottom of the body, and the concave region is formed by the recess of the body. The optical element according to any one of claims 1 to 6, wherein the concave space has an opening defined by a plane of the opening edge as a reference surface, and a diameter of an opening edge of the concave space is D _I , the height of the light incident surface is H _I , wherein 0.2 ≦H _I /D _I ≦3, the height H _{I of} the light incident surface is any point on the light incident surface along the direction perpendicular to the reference plane to the reference The maximum distance of the face. The optical component of claim 20, wherein 0.2 ≦H _I /D _I ≦0.8. The optical component of claim 21, wherein the bottom of the body has a bottom surface extending outward from a bottom edge of the light incident surface and directly or indirectly connected to the light exit surface, the bottom edge of the bottom surface diameter D _O, that the height of the light surface is H _O, wherein _{0.2 ≦ H O / D O ≦} 0.8, the light exit surface of the height H _O that light exit surfaces of any point on the direction of the reference surface along a perpendicular to the reference The maximum distance of the face. The optical element according to any one of claims 1 to 6, wherein the concave space has an opening so that a plane passing through the opening edge is a reference surface, and the opening edge of the concave space is non-circular The direction of the line connecting the two points farthest apart on the opening edge is a first direction, and the maximum distance of the two sides of the opening edge in the first direction is the first direction width D ₁ , The first direction is a second direction, and the maximum distance between the two sides of the opening edge is the width D _{2 of} the opening edge, and the height of the light incident surface is H _I , wherein _{0.2 ≦ H I / D 1 ≦} 3,0.2 ≦ H I / D 2 ≦ 3, the height H of the light-incident surface for the light incident surface _I took a little distance of the reference surface of the reference surface in a direction perpendicular to The maximum value. The optical element according to any one of claims 1 to 15, wherein the outer surface of the body comprises a reflecting surface, a bottom edge of the reflecting surface is adjacent to an outer edge of the bottom of the body, and the reflection The top edge of the face is directly or indirectly connected to the outer edge of the light exiting surface. The optical element according to any one of claims 1 to 15, wherein the light incident surface has one of a concave area, a convex area or a flat area adjacent to the annular area, the ring The region is closer to the bottom of the body than the concave region, the convex region or the flat region, and the concave region is formed by the recess of the body. The optical element according to any one of claims 1 to 17, wherein the material of the body is a transparent material. An illuminating device, comprising: the optical element according to any one of claims 1 to 15; and a light emitting diode, the light emitting surface of the light emitting diode facing the light incident surface of the optical element . The illuminating device of claim 27, wherein the illuminating diode system is a polycrystalline luminescent diode. An illuminating device comprising: the optical component according to claim 22; a light source; and a diffusing plate disposed outside the light emitting surface of the optical component for emitting light emitted from the light emitting surface In.