CN216844525U - Reflective lens - Google Patents

Abstract

The utility model relates to a reflective lens. The utility model discloses a reflective lens, through the prism plane of reflection on the plane of reflection, every the prism plane of reflection is including continuous first side and second side, the contained angle of first side and second side is 85-92, forms the prism micro-structure of total reflection, makes the original light that does not reach the total reflection on the plane of reflection, through once or many reflections on the prism micro-structure, makes the light total reflection on the plane of reflection, goes out from going out the plain noodles outgoing, can reach the optical effect that light is the wide-angle. The utility model discloses a light of reflective lens on the plane of reflection can both the total reflection, can reflect the light of more big angle scope, and then makes reflective lens's light-emitting effect more even, reaches the optical effect of big-angle outgoing.

Description

Reflective lens

Technical Field

The utility model relates to a lens technical field especially relates to a reflective lens.

Background

The technology of tv backlight source has undergone several generations of changes, from the initial fluorescent lamp as backlight source, to the later light guide plate as backlight source, and then to the present lens matched with LED, every change is optimized and adjusted from cost and size, as for the present lens matched with LED technology, the direct type backlight lens is generally divided into two types, i.e. refractive type and reflective type, in the backlight scheme design of lcd tv, the refractive type lens cannot be used in thinner backlight structure due to the limitation of the divergence angle and the distance from lens to screen, etc., and the number of LEDs required to be used is also large. The reflective lens has the greater advantage of having a smaller light mixing distance and being capable of obtaining a larger range of illumination spots and a larger angle of light intensity distribution.

However, most of the existing reflective lenses are of an inverted V-shaped catadioptric structure, and light emitted by the LED light source is refracted and reflected by the lens according to the fresnel catadioptric law to emit light; however, the light on the reflecting surface does not reach the total reflection condition, part of the light, especially the part of the light in the middle of the reflecting surface, is refracted out by the reflecting surface, part of the light is emitted out from the light emitting surface, the emitted light is more concentrated, the angle range of the light is small, and over-concentrated bright light spots are easily formed; the reflected light of the lens needs to meet the total reflection condition, so that the existing lens structure has limitation on the incident angle of the light, more large-angle light cannot be effectively reflected, the emergent light is concentrated, over-concentrated bright light spots are easily formed, and the light emitting effect is uneven.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims to provide a reflective lens, its advantage that has can reflect the light of more big angle scope by both total reflection on the plane of reflection, and then makes reflective lens's light-emitting effect more even, reaches the optical effect of wide-angle outgoing.

A reflective lens comprises a base platform and a boss, wherein the base platform comprises a bottom surface and an incident surface which are arranged at the bottom of the base platform, the incident surface is upwards sunken to form a containing groove, and the lower end of the incident surface is connected with the bottom surface; the boss is arranged at the top of the base station, the boss comprises a reflecting surface arranged at the top of the boss and a light-emitting surface arranged at the side part of the boss, the reflecting surface is downwards recessed and is in a conical shape, the reflecting surface comprises a plurality of prism reflecting surfaces which are sequentially connected, so that prism microstructures are formed at the top of the boss, each prism reflecting surface comprises a first side surface and a second side surface which are connected, and the included angle between the first side surface and the second side surface is 85-92 degrees; the upper end of the light emitting surface is connected with the reflecting surface, and the lower end of the light emitting surface is connected with the top of the base platform.

The reflecting lens of the utility model comprises a plurality of prism reflecting surfaces on the reflecting surface, so that the top of the boss forms a prism microstructure, each prism reflecting surface comprises a first side surface and a second side surface which are connected, and the included angle between the first side surface and the second side surface is 85-92 degrees; by the arrangement, the light incident from the incident surface to the reflecting surface is totally reflected on the reflecting surface, the reflecting angle of the reflected light is increased, the light is emitted out from the light emitting surface in a larger angle range, the uniformity of the light emitted by the reflective lens is improved, the light emitting effect is more uniform, the optical effect of large-angle emission is achieved, the phenomenon that the light emitting effect is too concentrated is avoided, and the reflective lens can obtain a large-range illumination light spot and a large-angle light intensity distribution.

Further, the incident surface and the reflecting surface are respectively rotationally symmetrical about the same vertical central axis. Through the symmetrical arrangement, the forming of the reflective lens is facilitated, and the incident plane and the light rays diffused by the reflecting plane are more uniform.

Further, the incident surface includes a first incident surface and a second incident surface, the first incident surface protrudes downward along the direction of the vertical central axis, the second incident surface protrudes toward the vertical central axis, the first incident surface is the top of the accommodating groove, and the second incident surface is the side of the accommodating groove. The first incident surface is protruded downwards along the direction of the vertical central shaft, so that light rays incident from the first incident surface are refracted on the reflecting surface in a larger angle range and are further totally reflected to the light-emitting surface in a larger angle range; the second incident surface is convex toward the vertical central axis, so that light rays incident from the second incident surface are refracted on the light-emitting surface in a larger angle range. The incident surface is set to be a two-section incident surface of the first incident surface and the second incident surface, so that incident light can obtain a larger divergence angle, and the diverged light is more uniform.

Furthermore, the light-emitting surface comprises a first light-emitting surface and a second light-emitting surface, the cross section of the first light-emitting surface is a straight surface, and the cross section of the second light-emitting surface is a curved surface; the upper end of the first light-emitting surface is connected with the reflecting surface, and the second light-emitting surface is respectively connected with the lower end of the first light-emitting surface and the top of the base platform. The section of the first light-emitting surface adopts a straight surface, and light rays in a large-angle range totally reflected by the reflecting surface can be emitted out on the first light-emitting surface in a large diffusion angle range; the section of the second light-emitting surface is a curved surface, so that light rays directly emitted onto the second light-emitting surface through the incident surface can be emitted out at a large diffusion angle, and the disorder of the emitted light rays is increased; through the two-section design of the first light-emitting surface and the second light-emitting surface, the angle range of emergent light is expanded, and therefore the light-emitting effect of the reflective lens is more uniform.

Furthermore, the first light emitting surface is inclined outwards from top to bottom. The first light-emitting surface is inclined from top to bottom and arranged outwards, so that light rays emitted on the first light-emitting surface can be emitted in a large-angle range.

Furthermore, the bottom surface of base station is equipped with a plurality of location column foot. The positioning column base can position and assemble the reflective lens and the light source, so that the light source is stably positioned in the accommodating groove, and the stability of the light emitting effect of the reflective lens is ensured.

Further, the bottom surface of the base platform comprises a plurality of micro-curved surfaces. The bottom surface is provided with a plurality of micro curved surfaces, so that light rays emitted on the bottom surface can be reflected to the reflecting surface or the light emitting surface, and the utilization rate of the light rays is improved.

Furthermore, one end of the side surface of the base platform, which is close to the bottom surface of the base platform, is inclined towards the bottom surface of the boss, so that an inclined surface for connecting the side surface and the bottom surface of the base platform is formed. The inclined plane is arranged on the bottom surface of the base platform towards the side surface, so that when the base platform is clamped with other components, the corners of the base platform can be prevented from being damaged by the other components.

As an optimized embodiment of the present invention, the reflective lens further includes a reflective film layer disposed on the reflective surface. Set up the reflectance coating on the plane of reflection, can further go out the better reflection of the light of penetrating on the plane of reflection, can reach the reflection of light effect of the large angle of plane of reflection.

As another optimized implementation manner of the present invention, the utility model further comprises an atomized texture layer disposed on the reflection surface. For example, in the processing technology of the reflective lens, a layer of fine atomization texture is added on a mold of a reflecting surface of the reflective lens, so that a layer of atomization texture is added on the reflecting surface of the reflective lens, the atomization texture can irregularly diffuse the reflected light in all directions, the reflected light is emitted to the emergent surface in a large angle range and then is emitted from the emergent surface, and the large-angle optical effect of the reflective lens can be achieved.

For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a front view of a reflective lens of embodiment 1;

FIG. 2 is a top view of the reflective lens of FIG. 1;

FIG. 3 is a schematic diagram of a prism microstructure of the embodiment of FIG. 1;

FIG. 4 is a bottom view of the reflective lens of FIG. 1;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 6 is a cross-sectional view of B-B in fig. 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "top", "bottom", "side", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Example 1

Referring to fig. 1-6, a reflective lens includes a base 1 and a boss 2, the base 1 includes a bottom surface 11 and an incident surface 12 disposed at the bottom of the base 1, the incident surface 12 is recessed upward to form a receiving groove 120, and the lower end of the incident surface 12 is connected to the bottom surface 11; the boss 2 is arranged at the top of the base station 1, the boss 2 comprises a reflecting surface 21 arranged at the top of the boss 2 and a light-emitting surface 22 arranged at the side part of the boss 2, the reflecting surface 21 is downwards concave and is in a conical shape, the reflecting surface 21 comprises a plurality of prism reflecting surfaces 211 which are sequentially connected, so that prism microstructures are formed at the top of the boss 2, each prism reflecting surface 211 comprises a first side surface 2111 and a second side surface 2112 which are connected, and the included angle between the first side surface 2111 and the second side surface 2112 is 85-92 degrees; the upper end of the light-emitting surface 22 is connected with the reflecting surface 21, and the lower end is connected with the top of the base 1.

The reflecting lens of the present invention comprises a plurality of prism reflecting surfaces 211 on the reflecting surface 21, so that the top of the boss 2 forms a prism microstructure, each prism reflecting surface 211 comprises a first side surface 2111 and a second side surface 2112 which are connected, and the included angle between the first side surface 2111 and the second side surface 2112 is 85-92 degrees; by the arrangement, light incident on the reflecting surface 21 from the incident surface 12 is totally reflected on the reflecting surface 21, the reflecting angle of the reflected light is increased, the light is emitted out from the light emitting surface 22 in a larger angle range, the uniformity of the light emitted by the reflective lens is improved, the light emitting effect is more uniform, the light emitting effect is prevented from being too concentrated, and the reflective lens can obtain a larger-range illumination light spot and a larger-angle light intensity distribution. The utility model discloses a prism micro-structure effect of reflective lens for light on the plane of reflection reaches the total reflection condition, and the total reflection jets out to the play plain noodles on the plane of reflection, can reach the optical effect of wide-angle outgoing.

Referring to fig. 5 and 6, as a preferred embodiment, the incident surface 12 and the reflecting surface 21 are respectively rotationally symmetric about the same vertical central axis. The incident surface 12 may include a first incident surface 121 and a second incident surface 122, the first incident surface 121 protrudes downward along the vertical central axis, the second incident surface 122 protrudes inward along a direction perpendicular to the vertical central axis, the first incident surface 121 is a top of the accommodating groove 120, and the second incident surface 122 is a side of the accommodating groove 120. The light emitting surface 22 may include a first light emitting surface 221 and a second light emitting surface 222, wherein the cross section of the first light emitting surface 221 is a straight surface, and the cross section of the second light emitting surface 222 is a curved surface; the upper end of the first light emitting surface 221 is connected to the reflection surface 12, and the second light emitting surface 222 is connected to the lower end of the first light emitting surface 221 and the top of the base 1. The first light emitting surface 221 is inclined from top to bottom.

The symmetrical arrangement facilitates the formation of the reflective lens and makes the light rays emitted from the incident surface 12 and the reflecting surface 21 more uniform. The first incident surface 121 protrudes downward along the vertical central axis, so that the light incident from the first incident surface 121 is refracted on the reflective surface 21 in a larger angle range, and is further totally reflected on the light emitting surface 22 in a larger angle range; the second incident surface 122 is convex toward the vertical central axis, so that the light incident from the second incident surface 122 is refracted on the light emitting surface 22 in a larger angle range. The incident surface 12 is a two-segment incident surface of the first incident surface 121 and the second incident surface 122, so that the incident light can obtain a larger divergence angle, and the diverged light is more uniform. The cross section of the first light emitting surface 221 is a straight surface, and light rays with a large angle range totally reflected by the reflecting surface 21 can be emitted out on the first light emitting surface 221 in a large diffusion angle range; the section of the second light emitting surface 222 is a curved surface, so that light rays directly emitted onto the second light emitting surface 222 through the incident surface 12 can be emitted out at a large diffusion angle, and the disorder of the emitted light rays is increased; through the two-section design of the first light-emitting surface and the second light-emitting surface, the angle range of emergent rays is expanded, and therefore the light-emitting effect of the reflective lens is more uniform. The first light emitting surface 221 is inclined from top to bottom and is disposed outward, so that the light emitted on the first light emitting surface 221 can be emitted in a wide angle range.

Referring to fig. 1, 4-6, the bottom surface 11 of the base platform 1 may be provided with a plurality of positioning studs 111. In one embodiment, the base platform 1 is a square platform structure, and 8 positioning column bases 111 are uniformly arranged on the bottom surface 11 of the base platform 1. The positioning column base 111 can position and assemble the reflective lens and the light source, so that the light source is stably positioned in the accommodating groove 120, and the stability of the light emitting effect of the reflective lens is ensured.

Referring to fig. 5 and 6, the bottom surface 11 of the base platform 1 may further include a plurality of micro-curved surfaces 112. The micro-curved surface 112 is arranged on the bottom surface, so that light rays emitted on the bottom surface can be better reflected. The plurality of micro-curved surfaces 112 are disposed on the bottom surface 11, so that light emitted on the bottom surface 11 can be reflected to the reflection surface 21 or the light emitting surface 22, thereby improving the utilization rate of the light.

Referring to fig. 6, one end of the side surface 13 of the base 1 close to the bottom surface 11 of the base 1 is inclined toward the bottom surface 11 of the base 1, and a slope 14 connecting the side surface 13 and the bottom surface 11 of the base 1 is formed. The inclined surface 14 is provided on the bottom surface 11 of the base 1 toward the side surface 13, and it is possible to prevent the corner of the base 1 from being damaged by other members when the base 1 is engaged with other members.

As another optimized implementation manner of this embodiment, the reflective lens may further include a reflective film layer disposed on the reflective surface. Set up the reflectance coating on the plane of reflection, can further go out the better reflection of light on the plane of reflection, can reach the reflection of light effect of the large angle of plane of reflection.

As another optimized implementation manner of the embodiment, the reflective lens may further include a fogging texture layer disposed on the reflective surface. For example, in the processing technology of the reflective lens, a layer of fine atomization texture is added on a mold of a reflecting surface of the reflective lens, so that a layer of atomization texture is added on the reflecting surface of the reflective lens, the atomization texture can irregularly diffuse the reflected light to all directions, the reflected light is emitted to an emergent surface in a large angle range, and then is emitted from the emergent surface, and the optical effect of the reflective lens in a large angle can be achieved.

In the reflective lens of this embodiment, the prism microstructure that is totally reflected on the reflecting surface 21 makes the light that has not been totally reflected on the reflecting surface 21 pass through one or more reflections on the prism microstructure, so that the light on the reflecting surface is totally reflected and exits from the light-emitting surface, and an optical effect that the light is at a large angle can be achieved. The utility model discloses a light on all planes of reflection can both the total reflection light-emitting, the light-emitting effect is more even. In this embodiment, the prism reflection surface is disposed at the middle part of the reflection surface, so that all the light rays emitted from the reflection surface can be totally reflected. In other embodiments, it may be provided over the entire reflective surface, as desired.

In the reflective lens of the present embodiment, the base 1 and the boss 2 may be integrally injection molded. The refractive lens and the light source are positioned by the positioning column base 111, so that the light emitted by the light source in the accommodating groove 120 is incident into the reflective lens from the incident surface 21. Specifically, when light enters the incidence surface 21, two paths of light are mainly used for emitting light in a large angle range, one is that the first incidence surface 121 of the light is refracted onto the reflection surface 21, the reflection surface 21 comprises a plurality of prism reflection surfaces 211 which are sequentially connected, so that the reflection surface 21 forms a prism microstructure, each prism reflection surface 211 comprises a first side surface 2111 and a second side surface 2112 which are connected, an included angle between the first side surface 2111 and the second side surface 2112 is 85-92 degrees, and due to the action of the prism microstructure on the reflection surface 21, the light emitted on the prism reflection surface 211 is totally reflected onto the light emitting surface 22 through the action of primary reflection or multiple reflection of the first side surface 2111 or the second side surface 2112, and is refracted out through the light emitting surface 22; secondly, the light is directly refracted on the light emitting surface 22 through the second incident surface 212, and then is refracted to emit light through the light emitting surface 22.

Compared with the prior art, the reflective lens of the utility model comprises a plurality of prism reflecting surfaces on the reflecting surface, so that the top of the boss forms a prism microstructure, each prism reflecting surface comprises a first side surface and a second side surface which are connected, and the included angle between the first side surface and the second side surface is 85-92 degrees; the light which does not reach the total reflection condition originally is reflected by the total reflection of the micro prism microstructure, so that the light on the reflecting surface can be totally reflected, the light within a larger angle range can be reflected, the light-emitting effect of the reflective lens is more uniform, and the optical effect of large-angle outgoing is achieved. Because the structure is smaller, the light can be cut simultaneously, and the light can achieve the light mixing and light equalizing effect.

In addition, the existing reflective lens adopts larger size and volume to realize the light scattering function, and has the problems of more injection molding materials, higher mold cost and longer injection molding period of the reflective lens. To further reduce the manufacturing cost of the catadioptric lens, it is preferable to use a catadioptric lens of a smaller size and volume. Because the existing light sources are all surface light sources instead of point light sources, the curve of the lens needs to be modified after the size is reduced to realize the same light scattering function as that of a large-size lens, and the same light spot quality as that of the large-size lens is realized. The sizes of the existing reflective lens are basically three sizes of 15 × 15, 17.5 × 17.5 and 20 × 20mm, wherein the sizes of 17.5 × 17.5mm are more, but the reflective lens of the present invention not only can adopt the above-mentioned large size, but also can adopt the small size of (10 × 10) - (15 × 15) mm to realize the astigmatism function same as the large size lens, and realize the light spot quality same as the large size lens.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, to those skilled in the art, changes and modifications may be made without departing from the spirit of the invention, and it is intended that the invention also encompass such changes and modifications.

Claims (10)

1. A reflective lens, comprising: the base platform comprises a bottom surface and an incidence surface, wherein the bottom surface and the incidence surface are arranged at the bottom of the base platform, the incidence surface is upwards sunken to form an accommodating groove, and the lower end of the incidence surface is connected with the bottom surface; the boss is arranged at the top of the base station, the boss comprises a reflecting surface arranged at the top of the boss and a light-emitting surface arranged at the side part of the boss, the reflecting surface is downwards recessed and is in a conical shape, the reflecting surface comprises a plurality of prism reflecting surfaces which are sequentially connected, so that prism microstructures are formed at the top of the boss, each prism reflecting surface comprises a first side surface and a second side surface which are connected, and the included angle between the first side surface and the second side surface is 85-92 degrees; the upper end of the light-emitting surface is connected with the reflecting surface, and the lower end of the light-emitting surface is connected with the top of the base platform.

2. A reflective lens according to claim 1, wherein: the incident surface and the reflecting surface are respectively rotationally symmetrical about the same vertical central axis.

3. The reflective lens of claim 2, wherein: the incident surface comprises a first incident surface and a second incident surface, the first incident surface protrudes downwards along the direction of the vertical central axis, the second incident surface protrudes towards the vertical central axis, the first incident surface is the top of the accommodating groove, and the second incident surface is the side of the accommodating groove.

4. The reflective lens of claim 1, wherein: the light emitting surface comprises a first light emitting surface and a second light emitting surface, the section of the first light emitting surface is a straight surface, and the section of the second light emitting surface is a curved surface; the upper end of the first light-emitting surface is connected with the reflecting surface, and the second light-emitting surface is respectively connected with the lower end of the first light-emitting surface and the top of the base platform.

5. The reflective lens of claim 4, wherein: the first light-emitting surface inclines outwards from top to bottom.

6. The reflective lens of claim 1, wherein: the bottom surface of base station is equipped with a plurality of location column foot.

7. The reflective lens of claim 1, wherein: the bottom surface of the base platform comprises a plurality of micro-curved surfaces.

8. The reflective lens of claim 1, wherein: one end of the side surface of the base platform, which is close to the bottom surface of the base platform, is inclined towards the bottom surface of the boss to form an inclined surface for connecting the side surface and the bottom surface of the base platform.

9. A reflective lens according to claim 1, wherein: the reflecting film layer is arranged on the reflecting surface.

10. A reflective lens according to claim 1, wherein: the reflective surface is provided with a plurality of light-reflecting layers.

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