专利详情

Optical structures for light emitting diodes (LEDS)

公开(公告)号：

EP3686484B1

公开(公告)日：

2023-05-24

申请号：

EP2020153257

申请日：

2020-01-22

授权日：

2023-05-24

受理局：

欧洲专利局

专利类型：

授权发明

简单法律状态：

有效

法律状态/事件：

授权

IPC分类号：

F21V5/00 | F21V5/02 | F21V5/04 | F21V7/00 | G02B19/00 | F21S8/08 | F21W111/02 | F21Y115/10 | F21Y105/10

战略新兴产业分类：

电子核心产业

国民经济行业分类号：

C4350 | C3874 | C4090 | C3879

当前申请(专利权)人：

EATON INTELLIGENT POWER LIMITED

原始申请(专利权)人：

EATON INTELLIGENT POWER LIMITED

当前申请(专利权)人地址：

30 Pembroke Road, Dublin, IE

工商统一社会信用代码：

工商登记状态：

工商注册地址：

工商成立日期：

工商企业类型：

发明人：

MERRIAM, VIRGINIA

代理机构：

NOVAGRAAF GROUP

代理人：

摘要：

A light system includes a substrate, one or more light emitting diodes (LEDs) coupled to the substrate, and an optical distribution plate positioned proximate the substrate. The optical distribution plate includes one or more optical structures each corresponding to the one or more LEDs. The one or more optical structures include a first surface that focuses LED light from the corresponding LED in a first orientation, and an opposite second surface that distributes LED light from the LED in a second orientation. The second orientation being substantially orthogonal to the first orientation.

技术问题语段：

The present patent text is about LED lighting systems and more specifically, addressing the optical structures used in these systems. The technical problem addressed in the text is the problem of thermal and radiometric power incident on the optic plate which may result from the close positioning of the domes to the LED.

技术功效语段：

The invention is a light system that includes an optical distribution plate with LEDs and optical structures. The optical structures include TIR elements and refractive elements that reflect and distribute LED light. The system can produce different beam patterns, such as an IESNA type I or type III beam pattern. The invention also describes a method of manufacturing the optical structure. The technical effects of the invention include improved light distribution and improved optical efficiency.

权利要求：

1. A light system (100) comprising: a substrate (110, 216); one or more light emitting diodes, in short LEDs, (108, 214, 314) coupled to the substrate (110, 216); and an optical distribution plate (116, 200, 300) positioned proximate the substrate (110, 216), the optical distribution plate (116, 200, 300) comprising one or more optical structures (124, 202, 302) each corresponding to the one or more LEDs (108, 214, 314), wherein the one or more optical structures (124, 202, 302) comprise: a first surface (210, 310) that focuses LED light (218, 318) from the corresponding LED (108, 214, 314) in a first orientation (206, 306); and an opposite second surface (212, 312) that distributes LED light (218, 318) from the LED (108, 214, 314) in a second orientation (204, 304), wherein the second orientation (204, 304) is substantially orthogonal to the first orientation (206, 306), wherein a centerline plane (228) extending along the first orientation (206, 306) is defined on the second surface (212, 312), wherein the second surface (212, 312) comprises: a set of single total internal reflection, in short TIR, elements (236) positioned symmetrically adjacent the centerline plane (228) wherein each single TIR element (236) reflects LED light (218, 318) substantially away from the centerline plane (228); a set of refractive elements (242) positioned symmetrically about the centerline plane (228) and outside of the set of single TIR elements (236), wherein each refractive element (242) of the set of refractive elements (242) refracts LED light (218, 318) substantially away from the centerline plane (228); and a set of double TIR elements (246) positioned symmetrically about the centerline plane and outside of the set of refractive elements (242), wherein each double TIR element (246) reflects LED light both away from and across the centerline plane (228). 2. The light system (100) of claim 1, wherein the first surface (210) comprises a Fresnel element (222, 224, 226). 3. The light system (100) of claim 1, wherein a centerline plane (326) extending along the second orientation (304) is defined on the first surface (310), and wherein the first surface (310) focuses LED light (318) towards one side of the centerline plane (326). 4. The light system (100) of claim 3, wherein the first surface (310) comprises at least one total internal reflection, in short TIR, element (322) and at least one refractive element (324). 5. The light system (100) of claim 1, wherein the first surface (210, 310) is disposed adjacent to and spaced away from the corresponding LED (108, 214, 314). 6. The light system (100) of any one of the preceding claims, wherein the first surface (210, 310) is an inner surface adjacent to the LED (108, 214, 314) ; and the second surface (212, 312) is an opposite outer surface. 7. The light system (100) of claim 1, wherein the set of refractive elements (242) is a first set of refractive elements and a second set of refractive elements (252) are positioned symmetrically about the centerline plane and outside of the set of double TIR elements (246), and wherein each refractive element (252) of the second set of refractive elements (252) refracts LED light substantially away from the centerline plane (228). 8. The light system (100) of claim 1, wherein the first surface (310) comprises at least one TIR element (322) and at least one refractive element (324), wherein a centerline plane (326) extending along the second orientation (304) is defined on the first surface (310), and wherein the at least one TIR element (322) is offset (328) from the centerline plane (326) and reflects LED light (318) substantially towards the centerline plane (326). 9. The light system (100) of any one of the preceding claims, wherein each double TIR element (246) includes two oblique linear TIR surfaces (248, 250).

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