Lens with rectangular light pattern and led unit using the same
US-2015003078-A1 · Jan 1, 2015 · US
Light flux controlling member, light emitting device, surface light source device, and display apparatus
US9028109B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9028109-B2 |
| Application number | US-201314063985-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 25, 2013 |
| Priority date | Oct 25, 2012 |
| Publication date | May 12, 2015 |
| Grant date | May 12, 2015 |
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Abstract
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A light flux controlling member includes an emission surface, a first incidence surface that is an inner surface of a concave portion, a second incidence surface that is disposed outside an opening rim portion of the concave portion, and a rear surface. A plurality of annular grooves is formed in the second incidence surface. Each annular groove forms an intersection line with an adjacent annular groove. When a virtual plane that passes through the outer rim portion of the second incidence surface and is orthogonal to the central axis is assumed as a reference plane, the plurality of annular grooves is disposed so that the intersection line become close to the virtual plane with distance from the central axis. The shape of a cross section of the annular groove including the central axis is an arc of which the center of curvature is located outside the light flux controlling member.
First claim
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The invention claimed is: 1. A light flux controlling member that controls distribution of light emitted from a light emitting element, comprising: an emission surface formed on a front side of the light flux controlling member to intersect with a central axis of the light flux controlling member; a first incidence surface formed on a rear side of the light flux controlling member, the first incidence surface being an inner surface of a concave portion that is rotationally symme…
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Frequently asked questions
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- What does patent US9028109B2 cover?
- A light flux controlling member includes an emission surface, a first incidence surface that is an inner surface of a concave portion, a second incidence surface that is disposed outside an opening rim portion of the concave portion, and a rear surface. A plurality of annular grooves is formed in the second incidence surface. Each annular groove forms an intersection line with an adjacent annul…
- Who is the assignee on this patent?
- Enplas Corp
- What technology area does this patent fall under?
- Primary CPC classification F21V13/04. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 12 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).