Shield member in LED apparatus
View Patent ↗An LED apparatus for illumination toward a preferential side in a downward and outward direction including a shield member in the form of a layer positioned over LED packages and secondary lens members. The shield member has a shield portion and a substantially planar non-shield portion thereabout. In preferred embodiments, the shield portion extends over a part of the lens portion of the secondary lens member. A cover preferably secures the shield member with respect to the secondary lens member, the primary lens and the LED package, the shield member preferably being sandwiched between the cover and the flange of the secondary lens member.
1. In an LED apparatus for illumination toward a preferential side in a downward and outward direction including (a) a mounting board, (b) an LED package thereon with a primary lens having a central axis, and (c) a secondary lens member over the primary lens and establishing a light path therebetween, the secondary lens member including a lens portion and a flange thereabout, the improvement comprising a shield member in the form of a layer positioned over the mounting board, LED package and secondary lens member, the shield member having a shield portion and a substantially planar non-shield portion thereabout, the shield member also having a shield-member aperture aligned with the light path and the shield portion bordering the shield-member aperture.
2. The LED apparatus of claim 1 wherein:
the shield portion extends over a part of the lens portion of the secondary lens member.
3. The LED apparatus of claim 2 wherein:
the secondary lens member is asymmetrical and has an illumination pattern with a preferential side and a non-preferential side; and
the shield portion is positioned to intercept light on the non-preferential side.
4. The LED apparatus of claim 1 further including a cover securing the shield member with respect to the secondary lens member, the primary lens and the LED package.
5. The LED apparatus of claim 4 wherein the cover has an opening aligned with the light path.
6. The LED apparatus of claim 4 wherein the shield member is sandwiched between the cover and the flange of the secondary lens member.
7. The LED apparatus of claim 6 wherein the flange of the secondary lens member is against the mounting board.
8. The LED apparatus of claim 6 wherein the sandwiching is of the non-shield portion of the shield member and of the flange of the secondary lens member when the cover is secured in place.
9. The LED apparatus of claim 8 further comprising a resilient gasket disposed between the shield member and the lens member.
10. The LED apparatus of claim 1 comprising:
a plurality of LED packages spaced from one another on the mounting board;
a plurality of the secondary lens members, each secondary lens member positioned over the primary lens of a corresponding LED package, each primary-lens/secondary-lens-member pair establishing a light path and having a central axis; and
a plurality of shield portions of the shield member, each shield portion positioned partially over each primary-lens/secondary-lens-member pair thereby to intercept a portion of the light emitted from the corresponding LED package.
11. The LED apparatus of claim 10 wherein for each shield portion of the shield member a shield-member aperture is aligned with the corresponding light path and the shield portion borders the shield-member aperture.
12. The LED apparatus of claim 10 wherein
each shield portion extends over a part of a corresponding lens portion.
13. The LED apparatus of claim 12 wherein for each shield portion of the shield member a shield-member aperture is aligned with the corresponding light path and the shield portion borders the shield-member aperture.
14. The LED apparatus of claim 12 wherein:
each secondary lens member is asymmetrical and has an illumination pattern with a preferential side and a non-preferential side; and
each corresponding shield portion is positioned to intercept light on the non-preferential side.
15. The LED apparatus of claim 10 further including a cover securing the shield member with respect to the secondary lens members, the primary lenses and the LED packages.
16. The LED apparatus of claim 15 wherein the cover has an opening aligned with the light path.
17. In an LED apparatus for illumination toward a preferential side in a downward and outward direction including (a) a mounting board and (b) an LED package thereon with a primary lens having a central axis, the improvement comprising a shield member in the form of a layer positioned over the mounting board and LED package, the shield member having a shield portion and a substantially planar non-shield portion thereabout, the shield member also having a shield-member aperture aligned with the light path and the shield portion bordering the shield-member aperture.
18. In an LED apparatus for illumination toward a preferential side in a downward and outward direction including (a) a mounting board, (b) an LED device thereon, and (c) a lens member over the LED device and establishing a light path therebetween, the improvement comprising a shield member in the form of a layer positioned over the mounting board, LED device and lens member, the shield member having a shield portion and a substantially planar non-shield portion thereabout, the shield member also having a shield-member aperture aligned with the light path and the shield portion bordering the shield-member aperture.
19. The LED apparatus of claim 18 wherein
the shield portion extends over a part of the lens portion of the lens member.
20. The LED apparatus of claim 19 wherein:
the lens member is asymmetrical and has an illumination pattern with a preferential side and a non-preferential side; and
the shield portion is positioned to intercept light on the non-preferential side.
21. The LED apparatus of claim 18 further including a cover securing the shield member with respect to the lens member and LED device.
22. The LED apparatus of claim 18 comprising:
a plurality of LED devices spaced from one another on the mounting board;
a plurality of the lens members, each lens member positioned over the corresponding LED device, each lens member/LED device pair establishing a light path and having a central axis; and
a plurality of shield portions of the shield member, each shield portion positioned partially over each lens member/LED device pair thereby to intercept a portion of the light emitted from the corresponding LED device.
23. In an LED apparatus for illumination toward a preferential side in a downward and outward direction including (a) a mounting board, (b) an LED device thereon, and (c) a lens member having a central axis, the improvement comprising a shield member in the form of a layer positioned over the mounting board, LED device and lens member, the shield member having a shield portion and a substantially planar non-shield portion thereabout, the shield member also having a shield-member aperture aligned with the light path and the shield portion bordering the shield-member aperture.
24. The LED apparatus of claim 23 wherein the shield member is sandwiched between the mounting board and the cover.