1. Technical Field
The disclosure relates generally to illumination, and more particularly to an illumination device utilizing a reflecting system.
2. Description of the Related Art
With the development of LED-based illumination, effective distribution of generated light is a priority. One method to obtain specific illumination distribution utilizes a plurality of light sources with determined light emitting angles. The requisite device is, however, bulky and expensive. In a second method, a specific lens array is utilized adjusting the light emission angle. However, such a lens array is very expensive. Further, when the light is transmitted through the lens array, much light energy is lost. Thus, what is called for is an illumination device utilizing a reflecting system that can alleviate the limitations described.
Referring to
A receiving portion 112 is defined in the middle of the substrate 11. The receiving portion 112 is configured for receiving the LED 101. The substrate 11 is a transparent plate of glass or resin. The receiving portion 112 is a through-hole in the first embodiment. Optimally, the light emitting surface 1012 of the LED 101 is parallel to and coplanar with the upper surface 114 of the substrate 11.
The reflecting ring 12 is mounted on the substrate 11. A chamber 13 is formed by the substrate 11 and the reflecting ring 12 cooperatively. The reflecting ring 12 includes a first reflecting unit 121, a second reflecting unit 122 and a third reflecting unit 123. Here, the first reflecting unit 121, the second reflecting unit 122 and the third reflecting unit 123 are annular, but can, alternatively, have other shapes, such as rectangle or other. The angle of the third reflecting unit 123 relative to the substrate 11 exceeds that of the second reflecting unit 122 relative to the substrate 11. The angle of the second reflecting unit 122 relative to the substrate 11 exceeds that of the first reflecting unit 121 relative to the substrate 11. In other words, the third reflecting unit 123 is steeper than the second reflecting unit 122 which in turn is steeper than the first reflecting unit 121.
Referring to
The reflecting ring 22 includes a first reflecting unit 221 and a second reflecting unit 222 mounted on the substrate 21. The first reflecting unit 221 is adjacent to the substrate 21, configured for reflecting light from the LED 201. The first reflecting unit 221 has a predetermined angle relative to the substrate 21. The second reflecting unit 222 extends upwardly from a top edge of the first reflecting unit 221 and is perpendicular to the substrate 21.
The light from the LED 201 is reflected by the first reflecting unit 221 and the second reflecting unit 222. Thus specific illumination distribution of the light of the LED 201 is obtained.
Referring to
The LEDs 32 are mounted on a surface 311 of the substrate 31. The LEDs 32 are electrically connected to the substrate 31. The substrate 31 is electrically connected to a peripheral power supply (not shown).
The reflecting module 33 includes a plurality of reflecting covers 10 each being as that shown in the first embodiment. The reflecting covers 10 are mounted on the surface 311 of the substrate 31. Each LED 32 is received in one of the reflecting covers 10.
The transparent plate 34 is mounted on the reflecting module 33. The transparent plate 34 is opposite to the surface 311 of the substrate 31, configured for enveloping the reflecting module 33 and uniformly transmitting the light from the reflecting module 33.
Referring to
The LEDs 42 are mounted on the substrate 41. The reflecting module 43 includes a substrate 431 and a plurality of reflecting covers 10 each being as that shown in the first embodiment. The reflecting covers 10 are mounted on the substrate 431 in matrix array. Compared with the third embodiment, the illumination device 40 can be more easily assembled since the reflecting covers 10 are assembled to the substrate 431 as a unit in advance whereby the reflecting covers 10 can be moved to cover all of the LEDs 42 by a single step of operation.
The structure of the reflecting cover 10, while simple and easily manufactured, provides specific illumination distribution. Production costs of an illumination device utilizing the reflecting cover 10 decreases accordingly.
While the disclosure has been described by way of example and in terms of exemplary embodiment, it is to be understood that the disclosure is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Number | Date | Country | Kind |
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200910304836.X | Jul 2009 | CN | national |