Illuminating apparatus with phosphor films

• US 8,162,506 B2
• Filed: 10/21/2009
• Issued: 04/24/2012
• Est. Priority Date: 12/18/2008
• Status: Expired due to Fees

• Current Assignee: Foxsemicon Integrated Technology Incorporated
• Original Assignee: Foxsemicon Integrated Technology Incorporated
• Inventors: Wei, An-Chi, Lai, Chih-Ming
• Primary Examiner(s): Neils, Peggy A.
• Application Number:
  US12/582,807
• Publication Number:
  US 20100157572A1
• Time in Patent Office: 916 Days
• Field of Search: 362/231, 362/84, 362/249.02, 362/330, 362/800, 313/506, 257/98
• US Class Current: 362/231
• CPC Class Codes: F21V 3/08 the material comprising photoluminescent substances
• CPC Class Codes: F21V 9/40 with provision for controlling spectral properties, e.g. colour, or intensity
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

An exemplary illuminating apparatus includes a light source, a supporting member, a first film and a second film. The light source includes a substrate and a plurality of light emitting diode arranged on the substrate. The supporting member connected to the substrate. The supporting member includes a light emitting surface at a side thereof distant from the light emitting diodes. The first film and the second film attached to each other and arranged at the light emitting surface of the supporting member. The first film includes a first phosphor doped therein, and the second film includes a second phosphor doped therein. Each of the first phosphor and the second phosphor is capable of being excited by light emitted from the light-emitting diodes and converting a wavelength of the light into a desired wavelength.

Claims

1. An illuminating apparatus comprising:

a light source comprising a substrate and at least one light emitting diode arranged on the substrate;

a supporting member connected to the substrate, the supporting member comprising a light emitting surface at a side thereof distant from the at least one light emitting diode;

a first film and a second film attached to each other and arranged at the light emitting surface of the supporting member, the first film comprising a first phosphor doped therein, the second film comprising a second phosphor doped therein, each of the first phosphor and the second phosphor capable of being excited by light emitted from the at least one light-emitting diode and converting a wavelength of the light into a desired wavelength;

wherein the first film further comprises a third phosphor, the first film defines a plurality of first regions arranged in an array, the first phosphor is doped into every odd-numbered first region in a sequence of the first regions, and the third phosphor is doped into every even-numbered first region in the sequence of the first regions;

wherein the second film further comprises a fourth phosphor, the second film defines a plurality of second regions arranged in an array, the second phosphor is doped into every odd-numbered second region in a sequence of the second regions, and the fourth phosphor is doped into every even-numbered second region in the sequence of the second regions; and

wherein the first regions of the first film are respectively directly opposite to the second regions of the second film.

2. The illuminating apparatus of claim 1, wherein the supporting member has a generally U-shaped cross section, and the supporting member is arranged under the substrate with a top end thereof contacting a periphery of an underside of the substrate.

3. The illuminating apparatus of claim 1, wherein at least a main central portion of the supporting member comprises an optical lens, and the optical lens is generally plate-shaped and parallel to the substrate.

4. The illuminating apparatus of claim 3, further comprising at least two screws, wherein the substrate comprises at least two first holes, the supporting member comprises at least two second holes, and the optical lens is locked in position by threaded engagement of the at least two screws in the at least two first holes and the at least two second holes.

5. The illuminating apparatus of claim 3, further comprising at least two latch portions, wherein the at least two latch portions are hitched onto peripheral portions of the substrate and an outmost one of the first and second films thereby securing the optical lens in position.

6. The illuminating apparatus of claim 5, wherein a cross-section of each of the latch portions is generally U-shaped.

7. The illuminating apparatus of claim 5, further comprising at least two holding members, wherein the at least two holding members are arranged on the periphery of an inner side of the substrate and are configured for holding the optical lens in position a predetermined distance away from the light source.

8. The illuminating apparatus of claim 1, wherein the at least one light emitting diode is at least one ultraviolet light emitting diode.

9. The illuminating apparatus of claim 1, wherein each of the first film and the second film is made of material selected from the group consisting of silicone, polymethyl methacrylate, resin, plastic, polyethylene terephthalate, and polycarbonate.

10. An illuminating apparatus comprising:

a light source comprising a substrate and at least one light emitting diode arranged on the substrate;

a supporting member connected to the substrate, the supporting member comprising a light emitting surface at a side thereof distant from the at least one light emitting diode;

a first film and a second film attached to each other and arranged at the light emitting surface of the supporting member, the first film comprising a first phosphor and a third phosphor doped therein, the first film defining a plurality of first regions arranged in an array, the first phosphor being doped into every odd-numbered first region in a sequence of the first regions, and the third phosphor being doped into every even-numbered first region in the sequence of the first regions, the second film comprising a second phosphor and a fourth phosphor doped therein, the second film defining a plurality of second regions arranged in an array, the second phosphor being doped into every odd-numbered second region in a sequence of the second regions, and the fourth phosphor being doped into every even-numbered second region in the sequence of the second regions, the first regions of the first film being staggered relative to the second regions of the second film, each of the first phosphor and the second phosphor capable of being excited by light emitted from the at least one light-emitting diode and converting a wavelength of the light into a desired wavelength.

11. The illuminating apparatus of claim 10, wherein the supporting member has a generally U-shaped cross section, and the supporting member is arranged under the substrate with a top end thereof contacting a periphery of an underside of the substrate, the at least one light emitting diode being fixed on the underside of the substrate and facing the supporting member.

12. The illuminating apparatus of claim 10, wherein at least a main central portion of the supporting member comprises an optical lens, and the optical lens is generally plate-shaped and parallel to the substrate.

13. The illuminating apparatus of claim 12, further comprising at least two screws, wherein the substrate comprises at least two first holes, the supporting member comprises at least two second holes, and the optical lens is locked in position by threaded engagement of the at least two screws in the at least two first holes and the at least two second holes.

14. The illuminating apparatus of claim 12, further comprising at least two latch portions, wherein the at least two latch portions are hitched onto peripheral portions of the substrate and an outmost one of the first and second films thereby securing the optical lens in position.

15. The illuminating apparatus of claim 14, wherein a cross-section of each of the latch portions is generally U-shaped.

16. The illuminating apparatus of claim 14, further comprising at least two holding members, wherein the at least two holding members are arranged on the periphery of an inner side of the substrate and are configured for holding the optical lens in position a predetermined distance away from the light source.

17. The illuminating apparatus of claim 10, wherein the at least one light emitting diode is at least one ultraviolet light emitting diode.

18. The illuminating apparatus of claim 10, wherein each of the first film and the second film is made of material selected from the group consisting of silicone, polymethyl methacrylate, resin, plastic, polyethylene terephthalate, and polycarbonate.