Brightness improving structure of light-emitting module with an optical film surface layer

• US 8,368,294 B2
• Filed: 11/30/2007
• Issued: 02/05/2013
• Est. Priority Date: 11/30/2007
• Status: Active Grant

• Current Assignee: Jenn-Wei Mii
• Original Assignee: Jenn-Wei Mii
• Inventors: Mii, Jenn-Wei
• Primary Examiner(s): Patel, Nimeshkumar
• Assistant Examiner(s): RAABE, CHRISTOPHER M
• Application Number:
  US12/745,519
• Publication Number:
  US 20100308709A1
• Time in Patent Office: 1,894 Days
• Field of Search: 313/485, 313/512, 313/634, 313/635, 313/318.11
• US Class Current: 313/318.11
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: F21V 3/10 characterised by coatings
• CPC Class Codes: F21V 3/12 the coatings comprising photoluminescent substances
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01J 61/35 provided with coatings on the walls thereof; Selection of materials for the coatings using coloured coatings H01J61/40; using luminescent coatings H01J61/42
• CPC Class Codes: H01J 61/38 Devices for influencing the colour or wavelength of the light

Abstract

A brightness improving structure of a light-emitting module with an optical film surface layer 12, wherein a light-emitting part 20 is provided inside a transparent envelop 10 and may emit ultraviolet or blue light, the said transparent envelop 10 has first wall and second wall, first inside wall 101 and second inside wall 103 are oppositely formed inside thereof, first outside wall 102 and second outside wall 104 are oppositely formed outside thereof. The first wall is partly or entirely provided with the optical film coating 12, the optical film coating 12 may at least reflect the ultraviolet or blue light exciting fluorescent/phosphorescent light, and may pass light rays comprising visible light. A visible light layer or both the visible light layer and a reflective layer are provided on the second wall, and the said light-emitting part 20 is placed at a setting location from the envelop 10.

Claims

1. A brightness improving structure of a light-emitting module with an optical thin-film surface layer, characterized in that said structure comprising:

a transparent envelop shaped as a hollow sphere, a partial hollow sphere or a hollow body similar to a sphere and having a first wall and a second wall opposite to the first wall on the envelop, below the envelop or between the envelop and its internal center, said first wall having a first inside wall surface and a first outside wall surface, said second wall adjoining said first wall and having a second inside wall surface and a second outside wall surface;

an optical thin-film which being a non-omni angular multiple layers film and having a long wave pass light filter function, and being coated on the first inside wall surface or the first outside wall surface of the transparent envelop over 30% of its area, said optical thin-film reflecting light rays at least comprising part or all ultraviolet or blue light exciting a fluorescent/phosphorescent layer and at least comprising visible light source which being in the long-wave band of visible wave length, and running through to emit;

a light-emitting part shaped as a sphere, a spherical area or a partial sphere arranged in the transparent envelop so the transparent envelop and the light-emitting part being space-arranged for emitting ultraviolet or blue light by at least one ultraviolet or blue light-emitting diode, or a light-emitting tube or light-emitting electrodes provided in the light-emitting part; and

a visible light layer formed of the fluorescent/phosphorescent layer, said visible light layer being coated on the second inside wall surface or the second outside wall surface the second wall surface of the transparent envelop for exciting the ultraviolet or blue light into visible light source, and the visible light layer being closer to the light-emitting part than to the optical thin-film;

wherein the distance c between an any point A of the reflecting layer of arc of said optical thin-film and a center of sphere B of the light-emitting part should meet the following relationship;

c≧

cscα

×

r, wherein r being the radius of the light-emitting part, α

being the incidence angle at the point A of the reflecting layer of said optical thin-film and a being 0 to 60°

, a connection line of A and B being the normal of the reflection angle at point A, and b being the distance projecting to tangential point of the periphery circumference of the light-emitting part from the point A of the reflecting layer.

2. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 1, characterized in that:

said transparent envelop being a partial sphere, which having an arc spherical surface and a bottom thereof interconnecting with each other, said first wall is arranged on the arc spherical surface of the partial sphere and said second wall is arranged on the bottom of the envelop, and at least a part of the light-emitting part being a partial sphere whose arc spherical surface is opposite to the arc spherical surface of the transparent envelop.

3. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 1, characterized in that:

said structure further providing with a reflective lampshade shaped as a hollow arc hemisphere with a radius, at least a transparent envelop being provided therein, the extension line of the second wall of the transparent envelop bottom of the hemisphere-shaped transparent envelop being positioned at the center of sphere of the reflective lampshade and an any point on the lampshade wall, and the depth of the center of the arc sphere being greater or equal to the height of the visible light layer coated area of the transparent envelop in the arc.

4. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 1, characterized in that:

said transparent envelop being a partial sphere, which having an arc spherical surface and a bottom thereof interconnecting with each other, said first wall is arranged on the arc spherical surface of the partial sphere and said second wall is arranged inside the envelop, said first wall is arranged on the arc spherical surface of the partial sphere and said second wall is arranged inside the envelop, and at least a part of the light-emitting part being a partial sphere whose arc spherical surface is opposite to the arc spherical surface of the transparent envelop.

5. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 1, characterized in that:

said light-emitting part being an ultraviolet or blue light luminescent tube arranged in the light-emitting part in form of rotation-wound, the inside wall surface of said luminescent tube being partially coated with a fluorescent/phosphorescent layer.

6. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 1, characterized in that:

the visible light layer is not at the center of the light-emitting part.

7. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 1, characterized in that:

the optical thin-film is coated hollowly.

8. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 1, characterized in that:

the visible light layer forms a straight wall surface.

9. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 2, characterized in that:

said structure further providing with a reflective lampshade shaped as a hollow arc, at least a transparent envelop being provided therein, the extension line of the second wall of the transparent envelop being positioned at the center of sphere of the reflective lampshade and an any point on the lampshade wall, and the depth of the center of the arc sphere being greater or equal to the height of the visible light layer coated area of the transparent envelop in the arc.

10. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 4, characterized in that:

said structure further providing with a reflective lampshade shaped as a hollow arc, at least a transparent envelop being provided therein, the extension line of the second wall of the transparent envelop being positioned at the center of sphere of the reflective lampshade and an any point on the lampshade wall, and the depth of the center of the arc sphere being greater or equal to the height of the visible light layer coated area of the transparent envelop in the arc.

11. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 5, characterized in that:

said structure further providing with a reflective lampshade shaped as a hollow arc, at least a transparent envelop being provided therein, the extension line of the second wall of the transparent envelop being positioned at the center of sphere of the reflective lampshade and an any point on the lampshade wall, and the depth of the center of the arc sphere being greater or equal to the height of the visible light layer coated area of the transparent envelop in the arc.

12. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 6, characterized in that:

said structure further providing with a reflective lampshade shaped as a hollow arc, at least a transparent envelop being provided therein, the extension line of the second wall of the transparent envelop being positioned at the center of sphere of the reflective lampshade and an any point on the lampshade wall, and the depth of the center of the arc sphere being greater or equal to the height of the visible light layer coated area of the transparent envelop in the arc.

13. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 7, characterized in that:

said structure further providing with a reflective lampshade shaped as a hollow arc, at least a transparent envelop being provided therein, the extension line of the second wall of the transparent envelop being positioned at the center of sphere of the reflective lampshade and an any point on the lampshade wall, and the depth of the center of the arc sphere being greater or equal to the height of the visible light layer coated area of the transparent envelop in the arc.

14. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 8, characterized in that:

said structure further providing with a reflective lampshade shaped as a hollow arc, at least a transparent envelop being provided therein, the extension line of the second wall of the transparent envelop being positioned at the center of sphere of the reflective lampshade and an any point on the lampshade wall, and the depth of the center of the arc sphere being greater or equal to the height of the visible light layer coated area of the transparent envelop in the arc.

15. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 3, characterized in that:

the reflective lampshade uses a full-dielectric invisible light reflection film, and the transparent envelop in the spherical area is concentrically arranged at intervals with the reflective lampshade.

16. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 9, characterized in that:

the reflective lampshade uses a full-dielectric invisible light reflection film, and the transparent envelop in the spherical area is concentrically arranged at intervals with the reflective lampshade.

17. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 10, characterized in that:

the reflective lampshade uses a full-dielectric invisible light reflection film, and the transparent envelop in the spherical area is concentrically arranged at intervals with the reflective lampshade.

18. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 11, characterized in that:

the reflective lampshade uses a full-dielectric invisible light reflection film, and the transparent envelop in the spherical area is concentrically arranged at intervals with the reflective lampshade.

19. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 12, characterized in that:

the reflective lampshade uses a full-dielectric invisible light reflection film, and the transparent envelop in the spherical area is concentrically arranged at intervals with the reflective lampshade.

20. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 13, characterized in that:

the reflective lampshade uses a full-dielectric invisible light reflection film, and the transparent envelop in the spherical area is concentrically arranged at intervals with the reflective lampshade.

21. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 14, characterized in that:

the reflective lampshade uses a full-dielectric invisible light reflection film, and the transparent envelop in the spherical area is concentrically arranged at intervals with the reflective lampshade.

22. The brightness improving structure of the light-emitting module with the optical thin-film surface layer according to claim 1, characterized in that:

the visible light layer or the visible light layer and a reflective layer is coated on the inside wall surface or the outside wall surface of the second wall.