Illumination Apparatus

Abstract

The present invention relates to an illumination apparatus (100) comprising a light engine (3) and a first lampshade (1) for accommodating the light engine (3), wherein the first lampshade (1) has a first expansion coefficient, wherein the illumination apparatus (100) further comprises a second lampshade (2) for accommodating the first lampshade (1), wherein the second lampshade (2) has a second expansion coefficient smaller than the first expansion coefficient, and is configured such that the changes in size or shape of the first lampshade (1) can be restrained under a high temperature.

Claims

1. An illumination apparatus comprising a light engine and a first lampshade for accommodating the light engine, wherein the first lampshade has a first expansion coefficient, characterized in that the illumination apparatus further comprises a second lampshade for accommodating the first lampshade, wherein the second lampshade has a second expansion coefficient smaller than the first expansion coefficient, and is configured such that the changes in size or shape of the first lampshade can be restrained under a high temperature.

2. The illumination apparatus according to claim 1, characterized in that the first lampshade is configured such that the light from the light engine is scattered and exits through the first lampshade, and the second lampshade is configured such that the light which is scatter and exits through the first lampshade is transmitted through the second lampshade.

3. The illumination apparatus according to claim 1, characterized in that the illumination apparatus further comprises a heat sink which is accommodated in the second lampshade, wherein the first lampshade is inserted and connected to the heat sink.

4. The illumination apparatus according to claim 3, characterized in that the first lampshade is configured to have a U-shaped cross section, and the first lampshade is inserted and connected to the heat sink in a gliding manner.

5. The illumination apparatus according to claim 1, characterized in that the first lampshade and the second lampshade are configured to be tubular.

6. The illumination apparatus according to claim 1, characterized in that the second lampshade is made of a rigid material.

7. The illumination apparatus according to claim 1, characterized in that the first lampshade is made of PC material, and the second lampshade is made of glass material.

8. The illumination apparatus according to claim 7, characterized in that the second lampshade is made of soda-lime glass material.

9. The illumination apparatus according to claim 1, characterized in that the first lampshade has a thickness smaller than the thickness of the second lampshade.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constitute a part of the present Description and are used to provide further understanding of the present invention. Such accompanying drawings illustrate the embodiments of the present invention and are used to describe the principles of the present invention together with the description. In the accompanying drawings the same components are represented by the same reference numbers. As shown in the drawings:

[0017] FIG. 1 shows an exploded schematic diagram of an illumination apparatus according to the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] FIG. 1 shows an exploded schematic diagram of an illumination apparatus 100 according to the present invention. The illumination apparatus 100 according to the present invention has a first lampshade 1, a light engine 3 which can be provided inside of the first lampshade 1, a heat sink 4, and an end cap 5. The heat sink 4 can be preferably be made of a heat-conducting plastic material or a metal material, so as to achieve efficient heat dissipation for the light engine 3. Moreover, the heat sink 4 is arranged inside the first lampshade 1 and can achieve good supporting result for parts such as the light engine 3 within the first lampshade 1. The first lampshade 1 can be configured to have a U-shaped cross section so as to be inserted and connected to the heat sink 4 in a gliding manner, and the heat sink 4 can then carry and support the first lampshade 1. The heat sink 4 can also be configured to have a U-shaped cross section so as to form a full circle-shaped cross section upon the first lampshade 1 being connected to the heat sink 4, and thus the formed structure can be form-fitted with the second lampshade 2 having a circle-shaped cross section. Alternatively, the heat sink 4 can be configured to not have a U-shaped cross section, and the first lampshade 1 can be nevertheless inserted and connected to the heat sink 4. In addition, the illumination apparatus 100 can be provided with no heat sink 4, as a result, the light engine 3 is directly arranged inside the first lampshade 1 and is carried and supported by the first lampshade 1.

[0019] In addition, the illumination apparatus 100 further comprises a second lampshade 2, which is provided outside the first lampshade 1, that is to say, the first lampshade 1 is accommodated in the second lampshade 2. Both the first lampshade 1 and the second lampshade 2 are preferably defined to have a lamp tube in a tubular shape, and accordingly, the first lampshade 1 and the second lampshade 2 may be form-fitted with each other in shape, and the outer surface of the first lampshade 1 can be in surface fitting with the inner surface of the second lampshade 2, or not in surface fitting with the same, which means that there is a gap between the outer surface of the first lampshade 1 and the inner surface of the second lampshade 2.

[0020] Both the first lampshade 1 and the second lampshade 2 are in connection with the same end cap 5. Although FIG. 1 only shows the end cap 5 provided at one end of the first lampshade 1 and the second lampshade 2, the person skilled in the art would know that the other end of the first lampshade 1 and the second lampshade 2 can also be provided with an end cap 5 or be directly connected to an external power supply. In the end cap 5, a drive circuit or an adapter for external power supply can be provided, and when the first lampshade 1 and the second lampshade 2 are mounted to the end cap 5, parts, such as an input cable, that face the lampshades and are exposed through the end cap 5, can all be accommodated in the first lampshade 1 and the second lampshade 2.

[0021] The first lampshade 1 is preferably designed to be made of PC material, and the second lampshade 2 is preferably designed to be made of glass or soda-lime glass. A person skilled in the art would know that the first lampshade 1 here can also be designed to be made of other materials having the same or similar performance, and the second lampshade 2 can also be designed to be made of other materials having the same or similar performance.

[0022] Accordingly, the first lampshade 1 has good thermal conductivity and can achieve optical processing, such as light scattering, of light from the light engine 3, such that lighting becomes softer. The second lampshade 2 is sleeved over the first lampshade 1 and restrains or maintains changes in size or shape of the first lampshade 1 occurring under high temperature by means of its low thermal expansion coefficient and high mechanical strength, namely, prevents the first lampshade 1 from undergoing thermal expansion to a great extent or in a great range, resulting in adverse effect on the normal use of the illumination apparatus 100. In addition, the first lampshade 1 can be designed to have a smaller thickness than the second lampshade 2 and have a lighter weight than the second lampshade 2, so as to reduce the manufacturing cost and complexity of the first lampshade 1.

[0023] The above is merely preferred embodiments of the present invention but not to limit the present invention. For a person skilled in the art, the present invention may have various alterations and changes. Any alterations, equivalent substitutions, improvements, within the spirit and principle of the present invention, should be covered in the protection scope of the present invention.

LIST OF REFERENCE SIGNS

[0024] 1 first lampshade [0025] 2 second lampshade [0026] 3 light engine [0027] 4 heat sink [0028] 5 end cap [0029] 100 illumination apparatus