专利详情

Asymmetric turning film with multiple light sources

公开(公告)号：

SG11201608201PA

公开(公告)日：

2016-10-28

申请号：

SG11201608201P

申请日：

2015-03-27

授权日：

受理局：

新加坡

专利类型：

发明申请

简单法律状态：

失效

法律状态/事件：

驳回

IPC分类号：

F21V8/00 | G02B5/02 | G02B5/04 | G02B6/00

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：

3M INNOVATIVE PROPERTIES COMPANY

原始申请(专利权)人：

3M INNOVATIVE PROPERTIES COMPANY

当前申请(专利权)人地址：

3M CENTER POST OFFICE BOX 33427 SAINT PAUL, MINNESOTA 55133-3427

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：

1999

工商企业类型：

发明人：

代理机构：

代理人：

SPRUSON & FERGUSON (ASIA) PTE. LTD.

摘要：

Optical systems are disclosed. More particularly, optical systems including an asymmetric turning film with at least a first and second light source are disclosed. Selection of geometries for the asymmetric turning film can enable different output viewing angles depending on the selective illumination of the first light source, the second light source, or both. The optical systems disclosed may be suitable in both luminaires and displays.

技术问题语段：

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权利要求：

1. An optical system, comprising: a first light source and a second light source having differently oriented light distributions; and an asymmetric turning film comprising a first major surface and a second major surface, wherein the first major surface is substantially smooth and the second major surface comprises a plurality of microstructures each comprising a first face having a first shape and a second face having a different second shape; wherein light from the first light source is preferentially reflected by the first face but not the second face; wherein light from the second light source is preferentially reflected by the second face but not the first face. 2. The optical system of claim 1, further comprising a lightguide configured to transport light from at least one of the first light source and the second light source. 3. The optical system of claim 2, further comprising a second lightguide configured to transport light from at least one of the first light source and the second light source. 4. The optical system of claim 1, wherein the first shape is substantially flat and the second shape is substantially curved. 5. The optical system of claim 1, wherein each of the plurality of microstructures is the same lateral cross-sectional shape. 6. The optical system of claim 1, wherein each microstructure of the plurality of microstructures further comprises a third face having a third shape, wherein either light from the first light source is preferentially reflected by the first face and the third face but not the second face or light from the second light source is preferentially reflected by the second face and the third face but not the first face. 7. The optical system of claim 1, further comprising a second plurality of microstructures, each comprising a third face having a third shape and a fourth face having a different fourth shape, wherein the third face preferentially reflects light from the first light source but not the second light source, wherein the fourth face preferentially reflects light from the second light source but not the first light source, and wherein at least two of the first shape, the second shape, the third shape, and the fourth shape are different. 8. The optical system of claim 1, wherein the second major surface of the asymmetric turning film includes at least one of an antireflective coating or an antireflective structured surface. 9. The optical system of claim 1, wherein the first major surface of the asymmetric turning film includes at least one of an antireflective coating or an antireflective structured surface. 10. The optical system of claim 1, wherein at least one of the first face or the second face includes a sawtooth or sinusoidal surface. 11. The optical system of claim 1, wherein the optical system has two display modes, wherein in the first mode, only the first light source emits light, and in the second mode, only the second light source emits light. 12. The optical system of claim 11, wherein the optical system has a third mode, wherein in the third mode, both the first light source and the second light source emits light. 13. An optical system having a display surface and two display modes, wherein in the first mode, the display surface emits light having a first characteristic set of viewing angles, and wherein in the second mode the display surface emits light having a second characteristic set of viewing angles, wherein the first characteristic set of viewing angles and the second characteristic set of viewing angles have different widths. 14. A luminaire comprising the optical system of claim 1. 15. A display comprising the optical system of claim 1.

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