Lighting apparatus

Abstract

A lighting apparatus includes a light source module, a light passing cover, a prism plate and a surface rim. The light source module includes a light source plate and multiple LED modules mounted on the light source plate. The light passing cover has a first side facing to the multiple LED modules for receiving a light from the multiple LED modules. The prism plate is disposed with more than 50 prism units for diffusing the light passing through the light passing cover from a second side of the light passing cover. The surface rim has a light opening for the light diffused by the prism units to escape from the lighting apparatus.

Claims

1. A lighting apparatus, comprising: a light source module comprising a light source plate and multiple LED modules mounted on the light source plate; a light passing cover with a first side facing to the multiple LED modules for receiving a light from the multiple LED modules; a prism plate disposed with more than 50 prism units for diffusing the light passing through the light passing cover from a second side of the light passing cover; a surface rim having a light opening for the light diffused by the prism units to escape from the lighting apparatus, wherein the surface rim has a side wall for enclosing and placing the prism plate; and a back cover to fix to the side wall of the surface rim, wherein the side wall has a pair of protruding arms to be inserted through corresponding plug holes of the back cover.

2. The lighting apparatus of claim 1, further comprising a bracket for fixing keeping the multiple LED modules with a predetermined distance to the light passing cover.

3. The lighting apparatus of claim 2, wherein the bracket has a side wall with a first edge fixing to the light source module and with a second edge fixing to the light passing cover.

4. The lighting apparatus of claim 1, wherein the prism plate has a positioning groove for inserting the light passing cover.

5. The lighting apparatus of claim 1, wherein each protruding arm is attached with an elastic unit for fixing to an installation platform.

6. The lighting apparatus of claim 1, wherein the light source module is disposed on the back cover.

7. The lighting apparatus of claim 1, wherein the back cover comprises metal material for heat dissipation.

8. The lighting apparatus of claim 7, wherein the surface rim comprises metal material for heat dissipation.

9. The lighting apparatus of claim 1, wherein the back cover is a circular shape and the surface rim has a rectangular shape.

10. The lighting apparatus of claim 1, wherein the prism units in central positions have larger diameters than the prism units in peripheral positions.

11. The lighting apparatus of claim 1, wherein the prism units are arranged on a three-dimension curve convex surface.

12. The lighting apparatus of claim 1, wherein the light passing cover has diffusion lenses corresponding to the LED modules.

13. The lighting apparatus of claim 1, wherein the light passing cover is a flat plastic plate.

14. The lighting apparatus of claim 1, wherein the light passing cover is a glue layer.

15. The lighting apparatus of claim 14, wherein the glue layer contains fluorescent material.

16. The lighting apparatus of claim 1, wherein there is an anti-blue-light layer disposed between the light passing cover and the prism plate layer.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 illustrates a lighting apparatus embodiment.

(2) FIG. 2 illustrates the example of FIG. 1 connected to a driver box.

(3) FIG. 3 illustrates another view of the example in FIG. 2.

(4) FIG. 4 illustrates a light guide example.

(5) FIG. 5 illustrates another optical guiding example.

(6) FIG. 6 illustrates components in an embodiment.

(7) FIG. 7 illustrates components in an embodiment.

(8) FIG. 8 illustrates a partial zoom-up view of a prism plate example.

(9) FIG. 9 shows another embodiment.

(10) FIG. 10 shows prism unit arrangement on a prism plate.

(11) FIG. 11 shows prism units mounted on a convex surface.

(12) FIG. 12 shows a glue layer used as the light passing cover.

DETAILED DESCRIPTION

(13) FIG. 9 shows an exploded view of a lighting apparatus embodiment. In FIG. 8, the lighting apparatus includes a light source module 661, a light passing cover 662, a prism plate 663 and a surface rim 664.

(14) The light source module 661 includes a light source plate 6611 and multiple LED modules 6612 mounted on the light source plate 6611.

(15) The light passing cover 662 has a first side 6621 facing to the multiple LED modules 6612 for receiving a light 6651 from the multiple LED modules 6612.

(16) The prism plate 6621 is disposed with more than 50 prism units 6631 for diffusing the light passing through the light passing cover 662 from a second side 6622 of the light passing cover 662. Specifically, there are multiple polygonal protruding blocks on a surface of the prism plate 661 and each polygonal protruding block is a prism unit. The prism unit has multiple facet with a tilt angle for performing light refraction to achieve the goal of diffusing the light evenly so that human eyes do not see the LED modules directly.

(17) The surface rim 664 has a light opening 6641 for the light diffused by the prism units 6631 to escape from the lighting apparatus.

(18) A detailed example based on the embodiment disclosed above with different views may be found in FIG. 1 to FIG. 8, which are explained as follows.

(19) In some embodiments, the surface rim 664 has a side wall 6652 for enclosing and placing the prism plate 663.

(20) In some embodiments, the lighting apparatus may also include a bracket 6613 for fixing keeping the multiple LED modules 6612 with a predetermined distance to the light passing cover 662. FIG. 1 shows an example of such concept with an exploded view.

(21) In FIG. 1, there is a surface rim 11 with a light opening 111. A prism plate 40 is installed to fit the light opening 111. There is a light passing cover 30 placed on the prism plate 40. A bracket 203 is placed between the light source module 20 and the light passing cover 30.

(22) A back cover 12 is attached to connect the surface rim 11 to enclose the prism plate 40, the light passing cover 30, the bracket 203 and the light source module 20. The back cover 12 may be made of metal material for carrying heat away from the light source module 20.

(23) In FIG. 1, the bracket 203 has a side wall 2033 with a first edge 2031 fixing to the light source module 20 and with a second edge 2032 fixing to the light passing cover 30.

(24) Please refer to FIG. 7. In some embodiments like FIG. 7, the prism plate 40 has a positioning groove 401 for inserting the light passing cover 30.

(25) Please refer to FIG. 6. In some embodiments like FIG. 6, the lighting apparatus may also include a back cover 12 to fix to the side wall 119 of the surface rim 11.

(26) In some embodiments, the side wall 119 has a pair of protruding arms 112 to be inserted through corresponding plug holes 121 of the back cover 12.

(27) In some embodiments, each protruding arm 121 is attached with an elastic unit 113 for fixing to an installation platform, like an installation cavity on a ceiling. Such elastic unit 113 has a spring 114 as illustrated and may be deformed to insert into the cavity and then uses elastic force to keep the lighting apparatus staying in the cavity.

(28) There is a buckle groove 115 on the surface rim 11 for inserting the prism plate so that the prism units face to the light opening 11.

(29) In some embodiments, the light source module is disposed on the back cover, as illustrated in FIG. 9.

(30) In some embodiments, the back cover includes metal material for heat dissipation.

(31) For example, the back cover may be made of metal or metal with plastic wrapping or plastic material with high heat dissipation ratio.

(32) In some embodiments, the surface rim includes metal material for heat dissipation. By engaging the back cover with the surface rim while both are made of metal material, the heat of the light source module is efficiently removed.

(33) In some embodiments, the back cover is a circular shape and the surface rim has a rectangular shape, as the example shown in FIG. 6.

(34) In FIG. 10, the prism units, illustrated as triangles for showing their directions, are arranged with a scattered order to scattering lights of the light source module in various directions. For example, these triangles direct to different directions. Please be noted these triangles are only for illustrating the concept. In embodiments, these prism units are arranged to direct to different directions, instead of aligning as a simple array.

(35) However, even the prism units are arranged in a simple array, there is still good visual effect, just a random arrangement further improve the diffusion effect.

(36) In some embodiments, the prism units in central positions 791 have larger diameters than the prism units in peripheral positions 792. This is found providing nice diffusion effect.

(37) In FIG. 11, the prism units 783 are arranged on a three-dimension curve convex surface 781. An optical prism is a transparent optical element with flat, polished surfaces that refract light. At least one surface is angled. The traditional geometrical shape of an optical prism is that of a triangular prism with a triangular base and rectangular sides, and in colloquial use “prism” usually refers to this type. Some types of optical prism are not in fact in the shape of geometric prisms. Prisms can be made from any material that is transparent to the wavelengths for which they are designed. Typical materials include glass, plastic, and fluorite.

(38) In FIG. 9, the light passing cover has diffusion lenses 6623 corresponding to the LED modules 6612.

(39) In some embodiments, the light passing cover is a flat plastic plate. Specifically, there may be diffusion lenses on the light passing cover. In other embodiments, the light passing cover may be completely flat, just to protect the LED modules.

(40) In FIG. 12, the light passing cover 752 is a glue layer. Specifically, gel glue is attached to fill the space between the light source module 753 and the prism plate 751. The gel glue may be hardened using ultra-violet light, as a protective layer between the LED modules and the prism plate.

(41) In some embodiments, the glue layer contains fluorescent material, e.g. to change spectrum of the output light.

(42) In FIG. 12, there is an anti-blue-light layer 754 disposed between the light passing cover 752 and the prism plate layer 751.

(43) Please refer to FIG. 2. FIG. 2 shows the lighting apparatus has a driver box 50. The driver box 50 has a second connector 51 detachably connected to a first connector 21 that is electrically connected to the light source module. The light source module is enclosed between the back cover 12 and the surface rim 11. There is an elastic unit 113 for fixing the lighting apparatus to a cavity, as mentioned above.

(44) Please refer to FIG. 3. FIG. 3 shows another view of the example in FIG. 2. In addition to the components shown in FIG. 2, FIG. 3 further shows a prism plate 40 exposed from a light opening of the surface rim 11.

(45) Please refer to FIG. 4, which shows a first option by using a light guide plate 741 where lights enter the light guide plate 741 from a lateral side and escape from a main surface of the light guide plate.

(46) Please refer to FIG. 5. In FIG. 5, the light from the LED modules pass through a light passing cover 30 and then diffused by the prism plate 40.

(47) The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings.

(48) The embodiments were chosen and described in order to best explain the principles of the techniques and their practical applications. Others skilled in the art are thereby enabled to best utilize the techniques and various embodiments with various modifications as are suited to the particular use contemplated.

(49) Although the disclosure and examples have been fully described with reference to the accompanying drawings, it is to be noted that various changes and modifications will become apparent to those skilled in the art. Such changes and modifications are to be understood as being included within the scope of the disclosure and examples as defined by the claims.