Optic lens cell and illuminated signage having a cell array

• US 6,244,727 B1
• Filed: 09/27/1999
• Issued: 06/12/2001
• Est. Priority Date: 09/27/1999
• Status: Expired due to Term

• Current Assignee: American Signal Company
• Original Assignee: American Signal Company
• Inventors: Ryan, Patrick H. Jr., Hart, Stephen P.
• Primary Examiner(s): CARIASO, ALAN B
• Application Number:
  US09/407,130
• Time in Patent Office: 624 Days
• Field of Search: 362/235-237, 362/240, 362/244, 362/326, 362/335, 362/456, 362/309, 362/310, 362/355
• US Class Current: 362/244
• CPC Class Codes: F21V 5/048 the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses
• CPC Class Codes: F21W 2111/00 Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
• CPC Class Codes: F21W 2111/02 for roads, paths or the like
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 3/0056 arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085
• CPC Class Codes: G02B 5/001 Axicons, waxicons, reflaxicons
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes

Abstract

A low loss optic lens cell the cell comprising at least one and preferably a plurality of light sources such as LEDs mounted to a board and capable of being electrically connected to a power source. A lens is attached to the board in a spaced apart relationship thereto. Each lens has a flat portion, least one and preferably a plurality of convex portions, and an aperture defined in each convex portion in a generally collinear arrangement relative to a corresponding LED. A plurality of the cells may be combined into an array, arranged in a housing, and connected to an electric control for operating the cells to form lighted patterns. Low intensity light rays are maximally utilized by refracting the rays back toward the LED axis and high intensity light rays are maximally utilized by allowing them to pass through the aperture without refraction and with little or no optical losses.

Alternative embodiments of the convex lens provide convex lenses convex about one axis or two axes, semi-circular segments of the convex lens, cylindrical apertures, slotted apertures, frustum shape apertures, semi-circular apertures, and lenses and LEDs offset relative to each other.

Claims

1. An optic lens cell for an illuminated sign or signal, comprising:

a) a plurality of light sources each having a central axis of light emission; and

b) at least one lens spaced apart from said light source, said lens comprising a generally flat lens portion having a plurality of convex portions integrally formed thereon, each of said convex portions having an aperture defined therein with a central axis that is generally parallel to one of said light source central axes;

wherein said light sources are capable of being electrically connected to a power source, each of said light sources is capable of emitting light rays with a first portion of said light rays redirected back generally toward said light central axis by said lens convex portion and a second portion of said light rays passing through said aperture.

2. The optic lens cell of claim 1, wherein said light source axis and said aperture axis are generally collinear.

3. The optic lens cell of claim 1, wherein said light source axis and said aperture axis are parallel and offset.

4. The optic lens cell of claim 1, wherein said lens aperture has a diameter such that said second portion light rays have a median or greater magnitude relative to said first and second portion light rays.

5. The optic lens cell of claim 1, wherein said lens convex portion has a central axis and said aperture is arranged in said lens so that said aperture central axis is generally collinear with said lens central axis.

6. The optic lens cell of claim 1, wherein said lens convex portion is convex about two axes.

7. The optic lens cell of claim 1, wherein said lens convex portion is convex about one axis.

8. The optic lens cell of claim 1, wherein said aperture is in the form of a generally cylindrical opening.

9. The optic lens cell of claim 6, wherein said aperture is in the form of a generally cylindrical-shaped opening.

10. The optic lens cell of claim 1, wherein said aperture is in the form of a slot.

12. The optic lens cell of claim 1, further comprising at least one board on which said at least one light source is mounted.

13. The optic lens cell of claim 12, wherein said lens is attached to said board.

14. The optic lens cell of claim 12, wherein said board is provided by a circuit board having electric circuit wiring embedded thereon.

15. The optic lens cell of claim 1, wherein a plurality of said cells are arranged in an array with each cell capable of being electrically connected to said power source.

16. The optic lens cell of claim 1, further comprising a housing capable of generally containing said at least one light source and said at least one lens.

17. The optic lens cell of claim 15, further comprising a housing capable of generally containing said plurality of light sources and said plurality of lens.

18. The optic lens cell of claim 1, further comprising an electric control that is electrically connected to said light source for operation thereof, wherein said control is associated with said sign and is capable of being electrically connected to said power source.

11. An optic lens cell for an illuminated sign or signal, comprising:

a) at least one light source having a central axis of light emission; and

b) at least one lens spaced apart from said light source and having at least one convex portion and at least one aperture defined therein, said aperture having a central axis that is generally parallel to said light source central axis, wherein said aperture is in the form of a generally frustum-shaped opening with a smaller diameter closer to said light source and a larger diameter farther from said light source;

wherein said light source is capable of being electrically connected to a power source and capable of emitting light rays, a first portion of said light rays are redirected back generally toward said light central axis by said lens convex portion and a second portion of said light rays pass through said aperture.

19. An optic lens cell for an illuminated sign or signal, comprising:

a) four light emitting diodes, each having a central axis of light emission and mounted and electrically connected to a circuit board having electric circuit wiring embedded thereon;

b) a lens spaced apart from said light emitting diodes and attached to said circuit board, said lens having a generally flat portion and four convex portions integrally formed thereon, each convex portion having one generally cylindrical aperture defined therein, each aperture having a central axis that is generally collinear with one of said four light emitting diodes axes,

wherein each of said light emitting diodes is capable of being electrically connected to a power source and capable of emitting light rays, a first portion of said light rays are redirected back generally toward said light central axis by said lens convex portion and a second portion of said light rays pass through said aperture.

20. The optic lens cell of claim 19, wherein a plurality of said cells are arranged in an array with each cell capable of being electrically connected to said power source.

21. The optic lens cell of claim 20, further comprising a housing capable of generally containing said cell array.

22. The optic lens cell of claim 21, further comprising an electric control that is electrically connected to said light emitting diodes for operation thereof, wherein said control is associated with said housing and is capable of being electrically connected to said power source.

23. The optic lens cell of claim 19, wherein said lens aperture has a diameter such that said second portion light rays have a median or greater magnitude relative to said first and second portion light rays.

24. An illuminated sign, comprising:

a) a plurality of optic cells arranged in an array; and

b) a housing generally containing said cells;

wherein each cell comprises a plurality of light sources and at least one lens, said light sources mounted on a circuit board and electrically connected together, each light source having a central axis of light emission, each light source capable of emitting light rays and said lens comprising a generally flat portion with a plurality of convex portions integrally formed thereon, each convex portion having a generally cylindrical-shaped aperture defined therein with a central axis that is generally parallel to one of said light source central axes, said lens spaced apart from said light sources and attached to said circuit board.

25. The illuminated sign of claim 24, wherein said cells of said array are capable of being electrically connected to a power source, a first portion of said light rays are redirected back toward said light axis by said lens convex portion and a second portion of said light rays pass through said aperture.

26. The illuminated sign of claim 24, wherein said lens aperture has a diameter such that said second portion light rays have a median or greater magnitude relative to said first and second portion light rays.

27. The illuminated sign of claim 24, wherein each said convex lens portion has a central axis and each said aperture is arranged in said lens so that said aperture central axis is generally collinear with said lens central axis.

28. The illuminated sign of claim 24, wherein said light sources comprises light emitting diodes.

29. The illuminated sign of claim 24, further comprising an electric control that is electrically connected to each of said cells for operation thereof, wherein said control is associated with said sign and is capable of being electrically connected to said power source.

30. The illuminated sign of claim 29, wherein said electric control is capable of allowing each cell to be energized by said power source independently of said other cells to form lighted patterns.