LED lens with ultrahigh light transmittance and low loss
By optimizing the curvature of the light-incident and light-exit surfaces of the LED lens, and using an arc-shaped protrusion and plexiglass material, the problems of low light transmittance and high light energy loss were solved, achieving a high-transmittance, low-loss LED lens design and avoiding color temperature drift.
Patent Information
- Application Number
- CN202520270973.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Existing LED lenses have low light transmittance and significant light energy loss due to Fresnel reflection, and the silicone filling solution may cause color temperature drift exceeding the standard ANSI C78.377 tolerance.
Design an LED lens with ultra-high light transmittance and low loss, using a light-transmitting block and an arc-shaped protrusion. By optimizing the curvature of the light-incident and light-excising surfaces, Fresnel reflected light undergoes total internal reflection at the light-incident surface and propagates outward from the lens again. The light-transmitting block is made of plexiglass or polycarbonate.
It improves light transmittance, reduces light energy loss, and avoids color temperature drift, thus achieving a simple and aesthetically pleasing LED lens design.
Smart Images
Figure CN223636003U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of LED lens transmittance technology, and more specifically, to an LED lens with ultra-high transmittance and low loss. Background Technology
[0002] Most LED street light lenses use a transmissive design, so Fresnel reflection occurs on both the incident and exit surfaces of the lens. Therefore, both incident and exit light are reflected, resulting in some light energy loss at the lens surfaces. For example, street light lenses made of polycarbonate (PC) reflect approximately 5% of light energy on each incident and exit surface, with a total loss of about 10%. Therefore, the maximum efficiency of a typical street light lens is 90%, and the efficiency of typical LED street light lenses has reached its limit, making improvement difficult.
[0003] like Figure 1 The diagram shows the refraction of light from a common lens. The Fresnel reflection generated by the design of the light-emitting surface of the common lens is absorbed by the PCB board after passing through the light-incident surface. Due to the Fresnel reflection at the light-incident and light-emitting surfaces of the lens, light loss occurs, resulting in a low light transmittance of the lens.
[0004] Light loss occurs due to Fresnel reflection at the light-incident and light-exit surfaces of the lens, resulting in low transmittance. Although there are solutions for street light lenses filled with silicone, when the transmittance exceeds 90% (PC material), it will cause color temperature drift of the LED. The drifted color temperature K value will exceed the tolerance requirements of standard ANSI C78.377. Utility Model Content
[0005] The technical problem this invention aims to solve is to address the aforementioned deficiencies of the prior art by providing an LED lens with ultra-high transmittance and low loss. When the light energy emitted from the LED is 100%, after passing through the incident surface of the lens, 5% of the light is reflected back due to Fresnel reflection and then absorbed by the PCB board. The remaining 95% of the light continues to propagate to the exit surface, where Fresnel reflection occurs again. When the Fresnel reflected light returns to the incident surface, by optimizing the curvature of the incident and exit surfaces, the Fresnel reflected light can undergo total internal reflection at the incident surface and propagate back out of the lens.
[0006] The technical solution adopted by this utility model to solve its technical problem is:
[0007] An LED lens with ultra-high light transmittance and low loss is constructed, comprising a light-transmitting block and an arc-shaped protrusion located on the light-transmitting block; wherein, the bottom surface of the arc-shaped protrusion is the light-incident surface close to the LED bead and the top surface is the light-outcrystal surface, the arc-shaped protrusion is an irregular arc-shaped protrusion and forms a concave cavity after protrusion, and the LED bead is located directly below the concave cavity;
[0008] The light entrance surface reflects part of the light reflected back by the light exit surface back to the light exit surface.
[0009] The LED lens has high light transmittance and low loss, and the light entrance surface is composed of a first profile and a second profile.
[0010] The first profile comprises a first sub-profile and a second sub-profile.
[0011] The LED lamp bead is close to the second sub-profile, and the first sub-profile reflects part of the light reflected back by the light exit surface back to the light exit surface.
[0012] The LED lens has high light transmittance and low loss, and the light exit surface is composed of a third profile and a fourth profile.
[0013] The first sub-profile reflects part of the light reflected back by the third profile back to the third profile.
[0014] The second profile reflects part of the light reflected back by the fourth profile back to the fourth profile.
[0015] The LED lens has high light transmittance and low loss, and the fourth profile is provided with a recess.
[0016] The LED lens has high light transmittance and low loss, and the center of the arc-shaped protruding part in the X-axis direction is eccentric and not located on the same vertical line as the center of the LED lens.
[0017] The LED lens has high light transmittance and low loss, and the thickness of the arc-shaped protruding part above the second sub-profile is thinner than the thickness above the first sub-profile.
[0018] The LED lens has high light transmittance and low loss, and the center of the arc-shaped protruding part in the X-axis direction is close to the center of the first sub-profile.
[0019] The LED lens has high light transmittance and low loss, and the center of the second profile in the Z-axis direction is located on the same vertical line as the center of the LED lens.
[0020] The utility model discloses a LED lens of superhigh light transmittance low loss, wherein the center of the recess and the center of the LED lens are on the same plumb line.
[0021] The utility model discloses a LED lens of superhigh light transmittance low loss, wherein the section of the recess in the Z axle direction is V-shaped.
[0022] The utility model discloses a LED lens of superhigh light transmittance low loss, wherein the section of the recess in the Z axle direction is V-shaped.
[0023] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the utility model will be further described below in conjunction with the drawings and the embodiment, and the drawings in the following description are only part of the utility model for the ordinary skilled in the art, and other drawings can be obtained according to these drawings without the creative labor of the premise:
[0024] Figure 1 It is the light refraction diagram of the ordinary LED lens improved in the background art of the preferred embodiment of the utility model;
[0025] Figure 2 It is the section view of the X axle direction of the LED lens of superhigh light transmittance low loss of the preferred embodiment of the utility model;
[0026] Figure 3 It is the section view of the Z axle direction of the LED lens of superhigh light transmittance low loss of the preferred embodiment of the utility model;
[0027] Figure 4 It is the light path diagram of the X axle direction of the LED lens of superhigh light transmittance low loss of the preferred embodiment of the utility model;
[0028] Figure 5 It is the light path diagram of the Z axle direction of the LED lens of superhigh light transmittance low loss of the preferred embodiment of the utility model;
[0029] Figure 6 It is the light distribution curve diagram of the LED lens of superhigh light transmittance low loss of the preferred embodiment of the utility model;
[0030] Figure 7 It is the three-dimensional diagram of the LED lens with super-high light transmittance and low loss according to the preferable embodiment of the utility model. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the following will combine the technical scheme in the utility model embodiment to make clear and complete description, obviously, the described embodiment is the part embodiment of the utility model, rather than all the embodiment. Based on the embodiment of the utility model, all other embodiments obtained by the person skilled in the art without paying the creative labor belong to the protection scope of the utility model.
[0032] The LED lens with super-high light transmittance and low loss according to the preferable embodiment of the utility model is shown as Figure 1 The LED lens with super-high light transmittance and low loss according to the preferable embodiment of the utility model is shown as Figures 2 to 7 It comprises the light transmission block 10 and the arc convex part 11 on the light transmission block 10, wherein the bottom surface of the arc convex part 11 is the light entrance surface close to the LED lamp bead 20 and the top surface is the light exit surface, the arc convex part 11 is irregular arc convex and forms the concave cavity after convex, the LED lamp bead 20 is located directly below or in the concave cavity, and the light transmission is facilitated.
[0033] The light entrance surface reflects part of the light or all the light reflected back by the light exit surface back to the light exit surface and emits from the X-axis direction and the Z-axis direction; the light transmission block 10 is made of organic glass or polycarbonate material.
[0034] The bottom surface of the arc convex part 11 is the light entrance surface close to the LED lamp bead 20 and the top surface is the light exit surface, the arc convex part 11 is irregular arc convex and forms the concave cavity after convex, so as to realize total reflection of the light from the X-axis direction and the Z-axis direction, and the LED lamp bead 20 is located directly below the concave cavity; the light entrance surface reflects part of the light reflected back by the light exit surface back to the light exit surface and emits; the light transmission block 10 is made of organic glass or polycarbonate material, so as to improve the light transmittance; so as to realize simple structure, high light transmittance, small light energy loss and good appearance.
[0035] As shown in Figures 2 to 5 And Figure 7 The light entrance surface is composed of the first profile 100 and the second profile 200, the first profile 100 is located in the X-axis direction, and the second profile 200 is located in the Z-axis direction.
[0036] The first profile 100 comprises the first sub-profile 110 and the second sub-profile 120.
[0037] The LED lamp bead 20 is close to the second sub-profile 120, the first sub-profile 110 reflects part of the light or all the light reflected back by the light exit surface back to the light exit surface and emits, so as to improve the light transmittance of the LED lens and reduce the loss of the light by the LED lens.
[0038] As shown in Figures 2 to 5 and Figure 7 The light exit surface is composed of a third profile 300 and a fourth profile 400, the third profile 300 is in the X-axis direction, and the fourth profile 400 is in the Z-axis direction.
[0039] The first sub-profile 110 reflects part of the light reflected back by the third profile 300 or all the light back to the third profile 300 and emits it from the x-axis direction.
[0040] The second profile 200 reflects part of the light reflected back by the fourth profile 400 back to the fourth profile 400 and emits it from the Z-axis direction.
[0041] As shown in Figures 2 to 5 and Figure 7 The fourth profile 400 is provided with a recess, so that the light produces a reflection angle and reflects back to different positions.
[0042] As shown in Figures 2 to 5 and Figure 7 The center of the arc-shaped protruding part 11 in the X-axis direction is eccentric and not on the same vertical line as the center of the LED lens, so that the light produces a reflection angle and reflects back to different positions.
[0043] As shown in Figures 2 to 5 and Figure 7 The thickness of the arc-shaped protruding part 11 above the second sub-profile 120 is thinner than that above the first sub-profile 110, so as to meet the requirement of making the light produce a reflection angle and reflect back to different positions.
[0044] As shown in Figures 2 to 5 and Figure 7 The center of the arc-shaped protruding part 11 in the X-axis direction is close to the center of the first sub-profile 110, so as to meet the requirement of making the light produce a reflection angle and reflect back to different positions.
[0045] As shown in Figures 2 to 5 and Figure 7 The center of the second profile 200 in the Z-axis direction is on the same vertical line as the center of the LED lens, so that the light is reflected to the outside of the left and right sides of the LED lamp bead 20, and then reflected back to the exit surface by the incident surface and emitted.
[0046] As shown in Figures 2 to 5 and Figure 7 The center of the recess is on the same vertical line as the center of the LED lens, which is convenient for reflecting light.
[0047] As shown in Figures 2 to 5 and Figure 7 Figures 2 to 5 Figure 7 The cross section of the recess in the Z-axis direction is V-shaped, which is convenient for reflecting light and has low light loss.
[0048] It should be understood that all the modifications and variations can be made according to the above description by those of ordinary skill in the art, and all these modifications and variations shall belong to the protection scope of the appended claims of the present application.
Claims
1. An LED lens with super-high light transmittance and low loss, comprising a light-transmitting block and an arc-shaped convex part located on the light-transmitting block; characterized in that, The bottom surface of the arc-shaped convex part is the light-in surface and the top surface is the light-out surface, the arc-shaped convex part is irregular arc-shaped convex and forms a cavity behind the convex part, and the LED lamp bead is located directly below the cavity; The light-in surface reflects part of the light reflected back by the light-out surface back to the light-out surface for emission; and the light-transmitting block is made of organic glass or polycarbonate.
2. The super high transmission low loss LED lens of claim 1, wherein, The light-in surface is composed of a first profile and a second profile, the first profile is located in the X-axis direction, and the second profile is located in the Z-axis direction. The first profile includes a first sub-profile and a second sub-profile. The LED lamp bead is close to the second sub-profile, and the first sub-profile reflects part of the light reflected back by the light-out surface back to the light-out surface for emission.
3. The super high transmission low loss LED lens of claim 2, wherein, The light-out surface is composed of a third profile and a fourth profile, the third profile is located in the X-axis direction, and the fourth profile is located in the Z-axis direction. The first sub-profile reflects part of the light reflected back by the third profile back to the third profile for emission. The second profile reflects part of the light reflected back by the fourth profile back to the fourth profile for emission.
4. The super high transmission low loss LED lens of claim 3, wherein, The fourth profile is provided with a recess.
5. The super high transmission low loss LED lens of claim 2, wherein, The center of the arc-shaped convex part in the X-axis direction is eccentric and does not locate on the same vertical line with the center of the LED lens.
6. The super high transmission low loss LED lens of claim 2, wherein, The thickness of the arc-shaped convex part above the second sub-profile is thinner than that above the first sub-profile.
7. The super high transmission low loss LED lens of claim 6, wherein, The center of the arc-shaped convex part in the X-axis direction is close to the center of the first sub-profile.
8. The super high transmission low loss LED lens of claim 2, wherein, The center of the second profile in the Z-axis direction is located on the same vertical line with the center of the LED lens.
9. The super high transmission low loss LED lens of claim 4, wherein, The center of the recess is located on the same vertical line with the center of the LED lens.
10. The super high transmission low loss LED lens of claim 9, wherein, The cross section of the recess in the Z-axis direction is V-shaped.