MICRO LOUVER

Abstract

A device comprising a circuit board, said circuit board having a plurality of LEDs dispose on said circuit board, and a chassis, said chassis having a plurality of baffles, each baffle formed by bending a portion of the chassis substantially orthogonally to the surface of the chassis leaving a plurality of holes in said chassis, said holes spaced substantially the same spacing as the plurality of LEDs. The baffles may operate to shield light emitted from the LEDs to either 30 degrees, 45 degrees or 60 degrees. Also included is a housing operable to secure the circuit board and chassis into a fixed position.

Claims

1. A method including: disposing a plurality of light sources on a substrate; selecting a desired angle of light radiation; forming a microlouver assembly, said microlouver assembly containing holes at substantially the same spacing as the light sources, said microlouver assembly including baffles formed to provide the angle of radiation, and disposing the microlouver assembly over the substrate.

2. The method of claim 1 wherein the baffles are formed as detents out of the microlouver assembly.

3. The method of claim 1 wherein the light sources are LEDs.

4. The method of claim 1 wherein the microlouver assembly and baffles are stamped from a single piece of aluminum.

5. The method of claim 1 further including: disposing the substrate on a chassis.

6. The method of claim 1 wherein the baffles extend substantially either 3 mm, 7 mm or 15 mm from the plane of the openings.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0006] FIG. 1 illustrates an exploded view of an embodiment of a luminaire.

[0007] FIG. 2 shows a range of light radiation patterns for different length circuit boards having different light densities and different height microlouvers.

DESCRIPTION

[0008] Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

Detail Description

[0009] FIG. 1 illustrates an exploded view of an embodiment of a luminaire. In FIG. 1 a second chassis 110 is formed for reception of certain parts of the luminaire. The chassis may be made from aluminum, plastic, or other suitable material. Disposed in the chassis 110 is an elongated substrate 112 which may be a conventional circuit board or other flexible material. The substrate 112 has one or more light sources, such as LEDs, aligned in an array. Disposed over the substrate 112 is a microlouver assembly 114. The microlouver 114 may be formed from plastic, stamped aluminum or some other suitable material. The microlouver assembly, the first chassis, 114 is formed with multiple openings, each opening having at least one tab (or baffle) 118 projecting orthogonally from the surface of the microlouver assembly 114. As shown, the microlouver assembly 114 is stamped from a single piece of aluminum such the microlouvers 118 are detents out of the microlouver assembly 118. When the microlouvers 118 are formed, the interstitial spaces are formed to match the spacing of the light sources on the circuit board 112. A lens (or dust cover) 116 is disposed over the microlouver assembly 114.

[0010] In some embodiments the baffles 118 may have different colored surfaces to modulate the reflection of light from the light sources out of the luminaire. Also a dust cover 124 may be employed to protect the light source or modulate the amount of light. An aluminum, or other suitable, housing 120 for supporting the LED board 112 and the dust cover 124 may be employed.

[0011] References in the specification to “one embodiment”, “an embodiment”, “an example embodiment”, etc., indicate that the embodiment described may include a particular feature, structure or characteristic, but every embodiment may not necessarily include the particular feature, structure or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one of ordinary skill in the art to affect such feature, structure or characteristic in connection with other embodiments whether or not explicitly described. Parts of the description are presented using terminology commonly employed by those of ordinary skill in the art to convey the substance of their work to others of ordinary skill in the art.

[0012] In operation, the spacing (or density) of the LEDs and the height of the microlouvers operate to effect certain light patterns. While FIG. 1 shows the microlouvers 118 as stamped from the same material as the microlouver assembly 114, there is no requirement that this limitation is used in every embodiment. For example and without limitation, different spacing of interstices and different heights of microlouvers may be formed the effect a desired lighting pattern.

[0013] FIG. 2 shows a range of light radiation patterns for different length circuit boards having different light densities and different height microlouvers. For example the structure identified as “A” shows microlouvers for 12 inch circuit boards. The microlouver assembly provides for a pitch of 4.23 mm corresponding to the spacing of the light sources on the circuit board. With a louver height of 3 mm, the shielding for the light radiation is 30 degrees. In the structure identified as “B” the light sources have the same pitch of 4.23 mm, however the microlouvers are 7 mm high. This provides for a light radiation shielding of 60 degrees. Other alternatives are shown in Table 1.

TABLE-US-00001 TABLE 1 Pitch Board Length Shielding Height (H)  4.7 mm 10 inch 30 Degrees  3 mm 6.47 mm 12 inch 60 Degrees 15 mm 9.41 mm 10 inch 60 Degrees 15 mm 9.41 mm 10 inch 30 Degrees  6 mm

[0014] One having skill in the art may effectuate many optical patterns, e.g. from the diffraction and reflection effects of varying the height, color and material of construction, of the louvers in relation to the LED spacing. In certain embodiments, louvers of different height, color and material of construction, may be employed to allow for placement of luminaires in different environments. In some embodiments, louvers of different height, color and material of construction, may be employed to allow for placement of luminaires in an environment. Using the shielding angle as an example and without limitation, a luminaire may be created having a 30-degree light radiation pattern on one portion and a 60-degree light radiation pattern on another portion, to create a specific illumination pattern, resultant from the effects of the combination.

[0015] The above illustration provides many different embodiments or embodiments for implementing different features of the invention. Specific embodiments of components and processes are described to help clarify the invention. These are, of course, merely embodiments and are not intended to limit the invention from that described in the claims.

[0016] Although the invention is illustrated and described herein as embodied in one or more specific examples, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.