Low glare TIR lens

Abstract

The utility model relates to the technical field of TIR lenses, and discloses a low-glare TIR lens, which comprises a light inlet part, a reflection part and a refraction part, the light inlet part is used for receiving light rays emitted by a light source, the reflection part and the refraction part are used for receiving and reflecting the light rays, and the reflection part and the refraction part are respectively used for refracting the light rays; the refraction part comprises a plurality of sedimentation parts which are sequentially arranged in a sinking mode in the direction towards the light inlet part, and the sedimentation parts are used for refracting light rays and shielding the light rays. During use, light emitted by a light source passes through the light inlet part to the reflection part and the refraction part, light refracted by the sedimentation parts can be blocked by other sedimentation parts, light of the refraction part is reserved without reducing light emitting efficiency, light is prevented from being directly refracted out to form glare, most of light refracted by the refraction part is reserved, and light emitting efficiency is improved. Meanwhile, refracted light of a light path is reduced, and compared with the mode of directly refracting to emit light after light emitting, the glare effect is greatly reduced, the low-glare target is achieved, and therefore the low-glare TIR lens achieves low glare.

Description

Technical Field

[0001] This utility model patent relates to the technical field of TIR lenses, and specifically to a low-glare TIR lens. Background Art

[0002] When lighting fixtures are used, TIR lenses are used as an optical method. When distributing light, a common problem is the trade-off between efficiency and glare. Conventional TIR lens structures split the light emitted by the LED into two parts: one for central refraction and the other for side reflection.

[0003] At present, to a certain extent, the main source of visual glare of TIR lenses is reflected in the middle refraction part. Because the light in this part is directly refracted and the refracted light is directly emitted, the refraction distance of the light path is short, resulting in particularly severe visual glare in this part. However, in order to achieve the highest possible lighting efficiency, both parts of the light emitted by the LED must be utilized. However, since the light emitted by the middle refraction is directly refracted, especially when looking directly at the lamp, the light in the middle part will directly hit the eyes, which is very dazzling.

[0004] For example, a prior patent with authorization publication number CN215764937U discloses a color-mixing lens for eliminating imaging defects, including a projection portion and a reflection portion, wherein the reflection portion is arranged to surround the projection portion, the inner end of the reflection portion forms a light inlet, the light inlet is used for the LED light source to enter, and the outer end of the reflection portion is arranged in a flared shape in a direction away from the light inlet; the reflection portion has a first reflection surface and a second reflection surface, the first reflection surface is arranged to surround the projection portion, and in a flared shape in a direction away from the light inlet, the first reflection surface is used to focus light on the projection portion; the outer surface of the reflection portion forms a second reflection surface, the second reflection surface is arranged in a flared shape in a direction away from the light inlet, and the second reflection surface is used to focus light on the projection portion.

[0005] In the prior art, the middle portion of the TIR lens directly refracts light. When viewed directly, the light will directly hit the glasses, causing glare to the user. The TIR lens has a high glare problem. Utility Model Content

[0006] The purpose of the utility model is to provide a low-glare TIR lens, aiming to solve the problem of high glare of TIR lenses in the prior art.

[0007] The present utility model is implemented as follows: a low-glare TIR lens includes a light-inlet portion, a reflecting portion, and a refracting portion, wherein the light-inlet portion is used to receive light emitted by a light source, the reflecting portion and the refracting portion are used to receive and reflect light, the reflecting portion and the refracting portion are respectively used to refract light, and the reflecting portion surrounds the refracting portion; the refracting portion includes a plurality of sinking portions, each of the sinking portions is sequentially sunken in a direction toward the light-inlet portion, and the sinking portions are used to refract light and block light.

[0008] Furthermore, the subsidence portion has a subsidence surface, the subsidence surface is arranged in a ring shape, and the subsidence surface is used to refract light, and the subsidence surfaces of the subsidence portions are arranged in a staggered manner.

[0009] Furthermore, the subsidence surface includes a plurality of micro-facets, each of which is arranged in a flat butt-jointed manner, and the micro-facets are used to refract light.

[0010] Furthermore, each of the micro-facets is arranged in a sequential butt-jointed manner along a spiral direction; or, each of the micro-facets is arranged in a polygonal manner and is sequentially butt-jointed; or, each of the micro-facets is arranged in a Thiessen polygon array.

[0011] Furthermore, the subsidence surface is arranged to extend obliquely in a direction away from the light-entering portion.

[0012] Furthermore, the refractive portion includes at least three subsidence portions.

[0013] Further, the refractive portion includes three subsidence portions, which are arranged to be sunken in sequence along the direction toward the light input portion; or, the refractive portion includes four subsidence portions, which are arranged to be sunken in sequence along the direction toward the light input portion.

[0014] Furthermore, the plurality of subsidence portions include a distal subsidence portion away from the light-entering portion, the distal subsidence portion has a subsidence radial distance along the direction of travel, the light-entering portion has a light-entering radial distance along the radial direction, and the subsidence radial distance is greater than the light-entering radial distance.

[0015] Furthermore, settlement distances are formed between the settlement portions, and the settlement distances are arranged in a consistent manner.

[0016] Furthermore, along the axial direction, the subsidence portion has a subsidence thickness, and along the direction away from the light input portion, the subsidence thickness of each subsidence portion is arranged to gradually increase.

[0017] Compared with the prior art, the low-glare TIR lens provided by the present invention, when in use, emits light from the light source through the light-inlet part to the reflective part and the refracting part, and the light is refracted by the reflective part and the refracting part to form a light spot; because the various subsidence parts are arranged to subside in sequence, the light refracted by the subsidence part can be blocked by other subsidence parts, thereby retaining the light of the refracting part without reducing the light output efficiency, and preventing the light from being directly refracted out to form glare, which not only retains most of the light refracted by the refracting part, but also reduces the light refracted in the light path. After the light is output, the glare effect will be greatly reduced compared with the previous method of directly refracting the light, achieving the goal of low glare, thereby enabling the TIR lens to achieve low glare. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional schematic diagram of a first embodiment of a micro-facet of a low-glare TIR lens provided by the present invention;

[0019] Figure 2 1 is a cross-sectional schematic diagram of a first embodiment of a micro-facet of a low-glare TIR lens provided by the present invention;

[0020] Figure 3 This is a schematic front view of a first embodiment of a micro-facet of a low-glare TIR lens provided by the present invention;

[0021] Figure 4 This is a three-dimensional schematic diagram of a second micro-facet embodiment of a low-glare TIR lens provided by the present invention;

[0022] Figure 5 This is a schematic front view of a second micro-facet embodiment of a low-glare TIR lens provided by the present invention;

[0023] Figure 6 This is a three-dimensional schematic diagram of a third micro-facet embodiment of a low-glare TIR lens provided by the present invention;

[0024] Figure 7 This is a schematic front view of a third micro-facet embodiment of a low-glare TIR lens provided by the present invention;

[0025] Figure 8 This is a schematic diagram of the optical path of the low-glare TIR lens provided by the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0028] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Reference Figure 1-8 The figure shows a preferred embodiment of the present invention.

[0030] The low-glare TIR lens includes a light-inlet portion 1, a reflective portion 2, and a refractive portion 3. The light-inlet portion 1 is used to receive light emitted by a light source, the reflective portion 2 and the refractive portion 3 are used to receive and reflect light, the reflective portion 2 and the refractive portion 3 are respectively used to refract light, and the reflective portion 2 surrounds the refractive portion 3; the refractive portion 3 includes a plurality of subsidence portions 31, each of which is arranged to be sequentially sunken in the direction toward the light-inlet portion 1, and the subsidence portions 31 are used to refract and block light.

[0031] When the low-glare TIR lens is in use, the light source emits light through the light-inlet portion 1 to the reflective portion 2 and the refractive portion 3, and the light is refracted by the reflective portion 2 and the refractive portion 3 to form a light spot. Since the sinking portions 31 are arranged in a descending order, the light refracted by the sinking portion 31 can be blocked by other sinking portions 31, thereby retaining the light of the refractive portion 3 without reducing the light output efficiency and preventing the light from being directly refracted out to form glare. This not only retains most of the light refracted by the refractive portion 3, but also reduces the light refracted in the light path. After the light is emitted, the glare effect will be greatly reduced compared to the previous method of directly refracting the light, achieving the goal of low glare, thereby enabling the TIR lens to achieve low glare.

[0032] The subsidence portion 31 has a subsidence surface, which is arranged in a ring shape to facilitate the refraction of light. The subsidence surface is used to refract light, and the subsidence surfaces of each subsidence portion 31 are staggered. In this way, through the staggered subsidence surfaces, light is refracted in a stepped manner, and glare is blocked in layers, thereby improving the low-glare effect.

[0033] The subsidence surface includes multiple micro-facets, each of which is arranged in a flat and docked manner. The micro-facets are used to refract light. Under the action of each micro-facet, the light is focused and evenly distributed, thereby improving the light spot formation effect.

[0034] The subsidence surface is arranged to extend obliquely in a direction away from the light-incoming portion 1 ; in this way, the light-receiving area is increased, light reception and refraction are facilitated, and light extraction efficiency is improved.

[0035] The refractive portion 3 includes at least three sinking portions 31. Through the cooperation of different sinking portions 31, not only most of the light refracted by the refractive portion 3 is retained, but also the refracted light in the light path is reduced, which greatly reduces the glare effect and achieves the goal of low glare, thereby enabling the TIR lens to achieve low glare.

[0036] The plurality of subsidence portions 31 include a distal subsidence portion 31 away from the light-entering portion 1 , the distal subsidence portion 31 has a subsidence radial distance along the passing direction, the light-entering portion 1 has a light-entering radial distance along the radial direction, and the subsidence radial distance is greater than the light-entering radial distance.

[0037] In this way, the light emitted by the light source can pass through each sinking part 31 after passing through the light input part 1, and the light is fully refracted by each sinking part 31, thereby improving the light extraction efficiency. Moreover, under the action of the distal sinking part 31, the light is fully refracted, thereby improving the light extraction efficiency.

[0038] A settling distance is formed between each settling portion 31 , and each settling distance is arranged uniformly; in this way, light is more easily controlled, glare is greatly reduced, and the low-glare effect is improved.

[0039] Along the axial direction, the subsidence portion 31 has a subsidence thickness, and along the direction away from the light input portion 1, the subsidence thickness of each subsidence portion 31 is arranged to gradually increase; the light receiving area of the subsidence portion 31 is gradually increased, so that the light is fully refracted, thereby improving the light extraction efficiency.

[0040] The reflective part 2 adopts a smooth polished surface. Under the action of the reflective part 2, since there is no scale armor, the light is easier to control and the glare can be greatly reduced. For a small part that cannot adopt a smooth surface, a finer scale armor is used to track and correct the light trace to reduce glare.

[0041] After testing, it was found that the light extraction efficiency of a conventional lens with a TIR structure is 88.1%. The effective efficiency of a certain thickness of transparent PC material used in conventional optical lenses is 89%. The difference between the two is within 1%, which shows that the light extraction efficiency of this structure has reached its maximum. The low-glare lens optimizes the refractive part 3 on this structure. After testing, the low-glare lens efficiency is 87.3%, which is basically close to that of a conventional lens with a TIR structure. Therefore, the low-glare lens can solve the problem of efficiency and glare and achieve the requirements of high efficiency and low glare.

[0042] Micro-face Example 1:

[0043] The micro-facets are arranged in sequence along the spiral direction; with the cooperation of the micro-facets, they focus and evenly distribute the light, improving the light spot formation effect.

[0044] Micro-face Example 2:

[0045] The micro-facets are arranged in polygonal shape and connected in sequence; with the cooperation of the micro-facets, they focus and evenly distribute the light, thus improving the light spot formation effect.

[0046] Micro-face Example 3:

[0047] The micro-facets are arranged in a Thiessen polygon array; with the cooperation of the micro-facets, they focus and evenly distribute the light, improving the light spot formation effect.

[0048] Refraction portion 3 embodiment 1:

[0049] The refractive portion 3 includes three sinking portions 31, which are arranged to sink in sequence along the direction toward the light input portion 1. Through the cooperation of the three sinking portions 31, not only most of the light refracted by the refractive portion 3 is retained, but also the refracted light in the light path is reduced, which greatly reduces the glare effect and achieves the goal of low glare, thereby enabling the TIR lens to achieve low glare.

[0050] Refraction part 3 embodiment 2:

[0051] The refractive portion 3 includes four sinking portions 31, which are arranged to sink in sequence in the direction toward the light input portion 1. Through the cooperation of the four sinking portions 31, not only most of the light refracted by the refractive portion 3 is retained, but also the refracted light in the light path is reduced, which greatly reduces the glare effect and achieves the goal of low glare, thereby enabling the TIR lens to achieve low glare.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Low glare TIR lens, characterized by, The light-inlet portion includes a light-inlet portion, a reflecting portion, and a refracting portion. The light-inlet portion is used to receive light emitted by a light source. The reflecting portion and the refracting portion are used to receive and reflect light. The reflecting portion and the refracting portion are respectively used to refract light. The reflecting portion surrounds the refracting portion. The refracting portion includes a plurality of sinking portions, each of which is arranged to sink in sequence in a direction toward the light-inlet portion. The sinking portions are used to refract light and block light.

2. The low-glare TIR lens according to claim 1, wherein: The subsidence portion has a subsidence surface, which is arranged in a ring shape and is used to refract light. The subsidence surfaces of the subsidence portions are arranged in a staggered manner.

3. The low-glare TIR lens according to claim 2, wherein: The subsidence surface includes a plurality of micro-facets, each of which is arranged in a flat butt-jointed manner, and the micro-facets are used to refract light.

4. The low-glare TIR lens according to claim 3, wherein: The microfacets are arranged in a sequential butt-jointed manner along a spiral direction; or, the microfacets are arranged in a polygonal manner and are sequentially butt-jointed; or, the microfacets are arranged in a Thiessen polygon array.

5. The low-glare TIR lens according to any one of claims 2 to 4, wherein: The subsidence surface is arranged to extend obliquely in a direction away from the light-incoming portion.

6. The low-glare TIR lens according to any one of claims 1 to 4, wherein: The refractive portion includes at least three depressions.

7. The low-glare TIR lens according to any one of claims 1 to 4, wherein: The refractive portion includes three subsidence portions, which are sequentially arranged downward in a direction toward the light incident portion; or the refractive portion includes four subsidence portions, which are sequentially arranged downward in a direction toward the light incident portion.

8. The low-glare TIR lens according to any one of claims 1 to 4, wherein: The plurality of subsidence portions include a distal subsidence portion away from the light-entering portion, the distal subsidence portion has a subsidence radial distance along the passing direction, the light-entering portion has a light-entering radial distance along the radial direction, and the subsidence radial distance is greater than the light-entering radial distance.

9. The low-glare TIR lens according to any one of claims 1 to 4, wherein: A settlement distance is formed between each of the settlement parts, and each of the settlement distances is arranged in a consistent manner.

10. The low-glare TIR lens according to any one of claims 1 to 4, wherein: Along the axial direction, the subsidence portion has a subsidence thickness, and along the direction away from the light-incoming portion, the subsidence thickness of each subsidence portion is arranged to gradually increase.

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