Lighting device

Abstract

The present invention relates to a lighting device including a light transmittable shell, a conductive unit and a light source. The light transmittable shell has an inner space and a mounting opening connected to the inner space. The light source is mounted around the mounting opening such that the LEDs in the light source are arranged along the edge of the mounting opening. The light from the light source transmits through the light transmittable shell from the edge of the mounting opening, leading to a glowing effect of the light transmittable shell, improving the lighting efficiency of the lighting device. Furthermore, the LEDs are distributed along the edge of the mounting opening and have direct contact with the flowing air in open space, so the heat-dissipation of the LEDs is effective enough without extra cooling components.

Claims

1. A lighting device, electrically connected to an external power source, characterized in that the lighting device comprises: a light transmittable shell, constructed as one piece and having a mounting opening and an inner space, the mounting opening communicating with the inner space; a light source, comprising a plurality of light emitting diodes (LEDs), wherein the light source is mounted around the mounting opening such that the LEDs are arranged along an edge of the mounting opening; and a conductive unit, mounted on an inner surface of the light transmittable shell, and having a first end and a second end, wherein the first end is connected to the external power source, and the second end is connected to the light source respectively, wherein the edge of the mounting opening curves toward the inner space and forms an accommodation slot, and wherein the light source is mounted in the accommodation slot.

2. The lighting device as claimed in claim 1, wherein the light transmittable shell comprises a connecting end; the lighting device further comprising: a lamp cap, connecting to the connecting end; a power unit, mounted in the lamp cap and electrically connected to the lamp cap, wherein the power unit is electrically connected to the external power source through the lamp cap; wherein an end of the conductive unit is connected to the power unit through the lamp cap, and another end of the conductive unit extends along the inner surface of the light transmittable shell to the mounting opening and is electrically connected to the light source.

3. The lighting device as claimed in claim 2, wherein the lamp cap is mounted in the inner space.

4. The lighting device as claimed in claim 2, wherein the lamp cap is mounted on an outside surface of the light transmittable shell.

5. The lighting device as claimed in claim 1, wherein the light transmittable shell is a spherical shell, and the mounting opening is circular in shape.

6. The lighting device as claimed in claim 1, wherein the light transmittable shell is a cubical shell, and the mounting opening is square in shape.

7. The lighting device as claimed in claim 3, wherein the connecting end is a protruding part formed on the inner surface of the light transmittable shell; wherein the first end of the conductive unit extends along the inner surface of the light transmittable shell to the lamp cap, and the second end of the conductive unit extends between the inner surface of the light transmittable shell and the lamp cap and connects to the power unit.

8. The lighting device as claimed in claim 1, wherein the light transmittable shell is a planar shell, and the mounting opening is the edge of the shell.

9. The lighting device as claimed in claim 2, comprising two light sources, and the light transmittable shell comprising two mounting openings; wherein the light transmittable shell comprises a surrounding wall, having two opposite ends, and the two mounting openings are each respectively formed at the two opposite ends of the light transmittable shell; a bottom wall, an edge of the bottom wall is connected to an inner surface of the surrounding wall, and the connecting end is a protruding part formed on one side of the bottom wall.

10. The lighting device as claimed in claim 1, wherein the light transmittable shell further comprises: a pattern; wherein the pattern is formed on the light transmittable shell by laser engraving, polishing, or spray coating; wherein when the light source lights up, light is transmitted through the light transmittable shell and scatters from the pattern.

11. The lighting device as claimed in claim 1, wherein the light transmittable shell further comprises a protruding rib that protrudes from the inner surface or an outside surface of the light transmittable shell.

12. The lighting device as claimed in claim 1, wherein the light source is an LED light strip having two opposite sides, wherein light is emitted from the two opposite sides.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of a lighting device of the present invention.

(2) FIG. 2 is a partial cross sectional view of a lighting device of a first embodiment of the present invention.

(3) FIG. 3 is a perspective view of a second embodiment of a lighting device of the present invention.

(4) FIG. 4 is a perspective view of a third embodiment of a lighting device of the present invention.

(5) FIG. 5 is an operational front side view of a lighting device of the present invention.

(6) FIG. 6 is a partial cross sectional view of a fourth embodiment of a lighting device of the present invention.

(7) FIG. 7 is a perspective view of a fifth embodiment of a lighting device of the present invention.

(8) FIG. 8 is a perspective view of a sixth embodiment of a lighting device of the present invention.

(9) FIG. 9 is a perspective view of a seventh embodiment of a lighting device of the present invention.

(10) FIG. 10 is a perspective view of an eighth embodiment of a lighting device of the present invention.

(11) FIG. 11 is a perspective view of a ninth embodiment of a lighting device of the present invention.

(12) FIG. 12 is a perspective view of a tenth embodiment of a lighting device of the present invention.

(13) FIG. 13 is a perspective view of a conventional LED light bulb.

(14) FIG. 14 is a cross sectional view of another conventional LED light bulb.

(15) FIG. 15 is a front side view of still another conventional LED light bulb of another prior art.

DETAILED DESCRIPTION OF THE INVENTION

(16) With reference to FIG. 1, the present invention provides a lighting device, including a light transmittable shell 10, a conductive unit 20 and a light source 30. The light transmittable shell 10 has a mounting opening 100 and an inner space, and the inner space communicates with the mounting opening 100. The light source 30 includes a plurality of light emitting diodes (LEDs), and the light source 30 is mounted around the mounting opening 100, such that the LEDs are arranged along the edge of the mounting opening 100.

(17) The conductive unit 20 is mounted on an inner surface of the light transmittable shell 10, having two opposite ends that connect to an external power source and the light source 30 respectively. The conductive unit 20 may be copper wires that are fixed to the inner surface with a transparent insulation tape.

(18) Preferably, the light transmittable shell 10 has a connecting end 11, and the lighting device further includes a lamp cap 40 and a power unit 50. The lamp cap 40 is connected to the connecting end 11, and the power unit 50 is mounted inside the lamp cap 40 and electrically connected to the lamp cap 40. When the lighting device is connected to the external power source, the power unit 50 is electrically connected to the external power source through the lamp cap 40, a first end of the conductive unit 20 is connected to the power unit 50 through the lamp cap 40, a second end of the conductive unit 20 extends along the inner surface of the light transmittable shell 10 toward the mounting opening 100, and the second end of the conductive unit 20 is electrically connected to the light source 30.

(19) In the embodiment, the lamp cap 40 is mounted on the light transmittable shell 10 and is connected to an external power source such as a lamp base. The power unit 50 converts the power from the external power source and provides appropriate power to the light source 30.

(20) In another embodiment, the lighting device may not include the lamp cap 40, and is connected to an external power supply module that includes the power unit 50. The first end of the conductive unit 20 is connected to the external power supply module and the power unit 50 within the external power supply module. The first end of the conductive unit 20 may extend through the connecting end 11 of the light transmittable shell 10 to reach the power supply module.

(21) With reference to FIG. 2, in a first embodiment of the present invention, the edge of the mounting opening 100 is curved toward the inner space and forms an accommodation slot 101. The light source 30, which might be covered with an insulation tube such as rubber, is mounted in the accommodation slot 101. Preferably, the accommodation slot 101 is glued with transparent insulation gel, so that the light source is fixed tightly in the accommodation slot 101 and is insulated appropriately.

(22) The light transmittable shell 10 can come in different shapes and sizes as required. The light transmittable shell 10 may be a sphere, a hemisphere, an ellipsoid, or a cube in shape. Furthermore, the connecting end 11 and the mounting opening 100 can also be placed in different relative positions or directions, so that the lighting devices can provide different options in terms of visual effect and main illuminating directions.

(23) For example, with reference to FIGS. 1 to 3, the light transmittable shell 10 is spherical, and the mounting opening 100 is a round opening.

(24) With reference to FIG. 1, in one embodiment, the lamp cap 40 is mounted on the outer surface of the light transmittable shell 10. In one aspect, the lamp cap 40 may be directly connected to the surface of the light transmittable shell 10 by gluing. In another aspect, as shown in FIG. 1, the connecting end 11 of the light transmittable shell 10 is a protruding part of the light transmittable shell 10 that is on the outside of the lighting device, and the lamp cap 40 is connected to the connecting end 11, such that the lamp cap 40 and the mounting opening 100 are facing opposite directions. The lighting device of the present embodiment may be suitable for installation at a lamp base on the ceiling such that the light transmittable shell 10 is suspended, the mounting opening 100 is facing the space underneath, and the light source 30 will be mainly illuminating the space underneath. The light transmitting through the light transmittable shell 10 to the other directions may light up the ceiling and provide the space with the reflected and indirect light source 30.

(25) With reference to FIG. 3, in a third embodiment, the angle between the directions that the mounting opening 100 and the lamp cap 40 are facing is less than 180 degrees for example 90 degrees. That is, the mounting opening 100 is at a side face of the lamp cap 40. The lighting device of the present embodiment, for instance, can be installed at a lamp base located at a wall, such that the mounting opening 100 is facing downward to provide main illumination to the space underneath. The light device may also be hung by a pendant cable from the ceiling such that the opening 100 is facing the side to provide illumination to the wall for example.

(26) In a third embodiment of the present invention, the lamp cap 40 is mounted in the inner space of the light transmittable shell 10. In one aspect, the lamp cap 40 may be directly connected to the inner surface of the light transmittable shell 10 by gluing. In another aspect, as shown in FIG. 4, the connecting end 11 of the light transmittable shell 10 is a protruding part of the light transmittable shell 10 on the inner surface of the lighting device, and the lamp cap 40 is placed in the inner space connected to the connecting end 11, so that the lamp cap 40 is facing the mounting opening 100 from the inner space. With reference to FIG. 5, the lighting device of the present embodiment may be applied to a desk lamp. Preferably, the first end of the conductive unit 20 extends to an inner surface of the connecting end 11 to connect to the power unit 50 inside the lamp cap 40.

(27) With reference to FIG. 6, in a fourth embodiment of the present invention, the light transmittable shell 10 may further include patterns 102. The patterns 102 may be formed on the light transmittable shell 10 by laser engraving, polishing, or spray coating. When the lighting device lights up, the light transmitted through the light transmittable shell 10 and scattering through the patterns 102 may highlight the patterns 102 and provide visual effects. Besides, in another embodiment, the light transmittable shell 10 may also include at least one through hole. The at least one through hole provides a window for better thermal convection and ensures the cooling of the light source 30. When the light source 30 lights up, the light transmitted through the light transmittable shell 10 may also scatter through the edge of a through hole and provide further visual effects.

(28) With reference to FIG. 7, in a fifth embodiment of the present invention, the light transmittable shell 10 further comprises at least one protruding rib 103 that protrudes from the outer surface or the inner surface of the light transmittable shell 10. That is, the protruding rib 103 is a protrusion of the light transmission shell 10 from either surface. For instance, the protruding rib 103 may be parallel to the mounting opening 100, or may intersects the mounting opening 100 at a specific angle. The protruding rib 103 may be formed in any shape, pattern and size. When the light transmits through the light transmittable shell and scatters through the protruding rib 103, a decent lighting visual effect is presented.

(29) With reference to FIG. 8, in a sixth embodiment of the present invention, the light transmittable shell 10 is a planar shell, or a slightly curved shell that is almost flat as a plate. In this case, the mounting opening 100 of the light transmittable shell 10 is the edge of the planar shell.

(30) With reference to FIG. 9 and FIG. 10, in a seventh and an eighth embodiment of the present invention, the light transmittable shell 10 is a cubical shell, and the mounting opening 100 is a square opening. The light transmittable shell 10 includes a bottom wall 12 and a surrounding wall 13. One end of the surrounding wall 13 is connected to the edge of the bottom wall 12, and an opposite end of the surrounding wall 13 forms the mounting opening 100 of the light transmittable shell 10. The surrounding wall 13 and the bottom wall 12 define the inner space of the light transmittable shell 10, and the connecting end 11 is formed on the bottom wall 12. FIG. 8 shows the sixth embodiment in which the connecting end 11 is a protrusion formed on the outside surface of the bottom wall 12. FIG. 9 shows the seventh embodiment in which the connecting end 11 is a protrusion formed on the inner surface in the inner space.

(31) With reference to FIGS. 11 and 12, in the ninth and tenth embodiments of the present invention, the light transmittable shell 10 includes two mounting openings 100, and the lighting device includes two light sources 30 that are mounted around the two mounting openings 100. The light transmittable shell 10 includes a surrounding wall 13 and a bottom wall 12. The surrounding wall 13 has two opposite ends, and the two mounting openings 100 are formed at the two opposite ends of the surrounding wall 13 of the light transmittable shell 10. The edge of the bottom wall 12 is connected to the inner surface of the surrounding wall 13, and the connecting end 11 is formed on one side of the bottom wall 12, so that the lamp cap 40 is facing toward one of the mounting openings 100. The two light sources are each electrically connected to the power unit 50 in the lamp cap 40 through one respective conductive unit 20. The two conductive units 20 are mounted on the inner surface of the surrounding wall 13 and the two sides of the bottom wall 12 to connect to the power unit 50 in the lamp cap 40.

(32) In the ninth embodiment of the present invention, as shown in FIG. 11, the surrounding wall 13 is a cylindrical wall. In the ninth embodiment of the present invention, as shown in FIG. 12, the surrounding wall 13 is a rectangular prism wall.

(33) Preferably, the light source 30 is a soft LED light strip, a hard LED light strip, or a double-sided LED light strip. The light source 30 is shaped according to the shape of the mounting opening 100. The double-sided LED light strip may be an LED light strip having two opposite sides, and the light of the LED light strip can be emitted from the both sides of the LED light strip, such as the LED light strip recited in the publication of TW201621210. The light emitted from such LED light source 30 will not be blocked by the substrate and is able to provide effective illumination in all directions. Utilizing such LEI) light source 30 in the present lighting device not only enables the light to be transmitted directly outside the mounting opening 100 effectively, but also provides a better glowing visual effect as the light is transmitted through the light transmittable shell 10.