TW201604490A - Light tube and light-guide tube structure - Google Patents

Abstract

The present invention provides a light-guide tube structure of a light tube including a hollow light-guide main part and a diffusion structure used for diffusing light. The hollow light-guide main part includes an inner surface and an outer surface, and the light generated from a light source module enters the hollow light-guide main part from the inner surface of the hollow light-guide main part. The diffusion structure is disposed at least one of the inner surface and the outer surface of the hollow light-guide main part and an inside of the hollow light-guide main part.

Description

Lamp and its light pipe structure

The present invention relates to a lamp tube and a light pipe structure thereof, and more particularly to a side-illuminated lamp tube using a hollow light guiding body portion and a light guiding tube structure thereof.

The conventional side-emitting lamp tube is composed of a light guiding rod and a light-emitting diode. Moreover, the light emitting diodes are disposed at the two ends of the light guiding rod, and the light emitting surface thereof faces the light guiding rod, so that the light generated by the light emitting diodes is incident on the light guiding rod. Since the conventional light guiding rod is formed on the white reflective layer, the light incident on the light guiding rod is reflected by the white reflecting layer and is emitted toward a part of the outer surface of the light guiding rod to achieve the function of illumination. However, since the white reflective layer shields a portion of the outer surface of the light guide bar, the angle of illumination of the side-illuminated light tube is limited. In addition, since the conventional light guiding rod is a solid structure, when the lamp tube is used for a long time, the middle portion of the light guiding rod supported only at both ends is susceptible to bending and deformation due to the influence of gravity, thereby affecting the light. The angle of illumination makes the tube unusable. Moreover, since the half-illumination intensity of the light-emitting diode is generally 60 degrees, the light incident into the light-guiding rod is easily diverged, and is not easily conducted to the middle portion of the light guide rod, so that the light emitted from the two ends of the light guide rod The brightness will be greater than the brightness of the light in the middle portion of the light guide bar, which may cause uneven brightness of the light emitted from the tube.

One of the main objects of the present invention is to provide a lamp tube and a light pipe structure thereof for improving the light-emitting angle of the lamp tube, solving the problem of bending and deformation of the intermediate portion, and homogenizing the light-emitting brightness of the lamp tube.

To achieve the above object, the present invention provides a light pipe structure for a lamp. Lamp includes The at least one light source module is disposed at at least one end of the light pipe structure and configured to generate a light, and the light pipe structure comprises a hollow light guiding body portion and a diffusion structure. The hollow light guiding main body portion includes an inner surface and an outer surface, and the light is incident from the inner surface of the hollow light guiding main body portion into the hollow light guiding main body portion. The diffusion structure is disposed on at least one of an inner surface of the hollow light guiding body portion, an outer surface, and an inner portion of the hollow light guiding body portion for diffusing light.

To achieve the above object, the present invention provides a lamp tube comprising at least one light source module and a light pipe structure. The light source module is used to generate a light. The light pipe structure includes a hollow light guiding body portion and a diffusion structure. The hollow light guiding main body portion includes an inner surface and an outer surface, and each of the two ends of the hollow light guiding main body portion has an opening, wherein the light is incident from the inner surface of the hollow light guiding main body portion into the hollow light guiding main body portion. The diffusion structure is disposed on at least one of an inner surface of the hollow light guiding body portion, an outer surface, and a hollow light guiding body portion for diffusing light.

The lamp tube of the invention uses a hollow light pipe structure, so that the middle portion of the light pipe structure is not easily bent or deformed by the gravity image under long-term use, and the light pipe structure includes a diffusion structure to uniformly diffuse the light source. The light of the module.

100‧‧‧ lamp

102‧‧‧Light source module

102a‧‧‧Glossy

104, 200, 300, 400, 500, 600‧‧‧ light pipe structure

104a‧‧‧ openings

106‧‧‧ hollow light guide body

106a‧‧‧ inner surface

106b‧‧‧Outer surface

108‧‧‧Diffusion structure

110‧‧‧First diffusion layer

112‧‧‧Light source

112a‧‧‧Glossy

114‧‧‧Concentrating structure

118‧‧‧Circuit board

120‧‧‧Parabolic mirror

120a‧‧‧Top opening

120b‧‧‧ bottom opening

122‧‧‧ lens

202, 302‧‧‧Second diffusion layer

402, 502‧‧‧Microstructure

602‧‧‧Diffusion particles

Fig. 1 is a schematic cross-sectional view showing a lamp tube according to a first embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view taken along line A-A' of Fig. 1.

3 is a cross-sectional view of a light source module according to a first embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view showing the structure of a light guide tube according to a second embodiment of the present invention.

Fig. 5 is a cross-sectional view showing the structure of a light guide tube according to a third embodiment of the present invention.

Figure 6 is a side elevational view showing the structure of a light pipe according to a fourth embodiment of the present invention.

Figure 7 is a side elevational view showing the structure of the light pipe of the fifth embodiment of the present invention.

Figure 8 is a cross-sectional view showing the structure of a light pipe according to a sixth embodiment of the present invention.

The present invention will be described in detail with reference to the preferred embodiments of the invention,

As shown in FIG. 1 , the embodiment provides a lamp tube 100 including at least one light source module 102 and a light pipe structure 104. The two ends of the hollow light guiding body portion respectively have an opening 104a, and the light source module The group 102 is disposed on at least one end of the light pipe structure 104 and is used to generate a light, and the light emitting surface 102a of the light source module 102 faces the opening 104a, so that the light of the light source module 102 can enter the light pipe structure 104. Inside. The light pipe structure 104 includes a hollow light guiding body portion 106 and a diffusion structure 108. The hollow light guiding body portion 106 includes an inner surface 106a and an outer surface 106b.

Referring to FIG. 2 at the same time, the hollow light guiding main body portion 106 is a transparent tubular structure. The diffusion structure 108 includes a first diffusion layer 110, such as a diffusion film or a diffusion sheet, disposed on the inner surface 106a of the hollow light guiding body portion 106 and covering the hollow light guiding body portion 106, so that the first diffusion layer 110 is also Tubular structure. Thereby, the light incident from the opening 104a of the light guide tube structure 104 first passes through the hollow hole in the first diffusion layer 110 and enters the first diffusion layer 110, and the light is homogenized through the first diffusion layer 110, and then The hollow light guiding body portion 106 is entered. Finally, the homogenized light is transmitted through the hollow light guiding main body portion 106 and is emitted from the outer surface 106b of the hollow light guiding main body portion 106. Therefore, since the light guide tube structure 104 of the present embodiment does not have a reflective layer, the light of the embodiment can be emitted from all the outer surfaces 106b of the hollow light guide main body portion 106, thereby improving the light exit angle of the light tube 100. . Moreover, the light pipe structure 104 of the present embodiment is a hollow structure. Therefore, the light pipe structure 104 of the present embodiment has a relatively light weight compared to the solid structure, so that the light guide is used under long-term use. Both ends of the tube structure 104 relatively easily support the weight of the intermediate portion such that the intermediate portion of the light pipe structure 104 is less susceptible to bending or deformation by gravity images. Thereby, the light pipe structure 104 of the embodiment can solve the problem that bending and deformation are easy to occur, and the service life thereof can also be improved. For example, the material of the hollow light guiding body portion 106 may include polymethyl methacrylate (PMMA) or other transparent substrate, but is not limited thereto. And, the length of the hollow light guiding body portion 106 It may be 2 or 4 inches (ft) and its outer diameter may be 5/8 inch or 1 inch, that is, the lamp 100 may be of the type T5 or T8, but the invention Not limited to this.

As shown in FIG. 1 and FIG. 3, in the present embodiment, the lamp tube 100 includes two sets of light source modules 102 respectively disposed in the two openings 104a of the light guide tube structure 104, but the invention is not limited thereto. In other embodiments, the light tube 100 can also have only a single light source module 102 disposed in one of the openings 104a of the light pipe structure 104. In addition, each light source module 102 includes a light source 112, a circuit board 118, and a light collecting structure 114, and the light collecting structure 114 is disposed on one of the light emitting surfaces 112a of the light source 112. For example, the light source 112 is disposed on the circuit board 118. The light source 112 can be a light emitting diode, an organic light emitting diode, or other light source that can generate light, but is not limited thereto. The concentrating structure 114 can include a parabolic mirror 120 and a lens 122. The light source 112 is disposed adjacent to the bottom opening 120b of the parabolic mirror 120, and the lens 122 is disposed at the top opening 120a of the parabolic mirror 120, directly above the light source 112. The top opening 120a is larger than the bottom opening 120b, so that the parabolic mirror 120 can be used to focus the light source 112 to emit light having a larger illumination angle, and the lens 122 can be used to focus the light source 112 to emit light having a smaller illumination angle, so that the light source module The scattering angle of the light emitted by 102 is smaller than the scattering angle of the light emitted by the light source 112, and the light generated by the light source module 102 can be focused. For example, the light source module 102 can have an illumination angle of half the intensity of illumination, between 2.5 degrees and 30 degrees, and preferably between 2.5 degrees and 5 degrees, wherein the illumination angle of the half illumination intensity is from vertical. The angle between the normal direction of the light-emitting surface 102a of the light source module 102 and the light-emitting direction of the light source module 102 is half the maximum light-emitting intensity. The illuminating angle of the light source 112 is reduced by the concentrating structure 114, and part of the light emitted by the light source module 102 can be conducted from the opening 104a at both ends of the light guiding tube structure to the middle portion of the light guiding tube structure 104 to enhance the light guiding tube structure 104. The brightness of the light emitted from the middle portion is approximately the same as the brightness of the light emitted from the ends of the adjacent light pipe structure 104, so that the brightness of the light emitted from the lamp 100 in the longitudinal direction can be uniformized. Taking the lamp tube 100 as the T8 type as an example, when the length of the light guide tube structure 104 is 1 foot, the light source module 102 has an illumination angle of less than 15 degrees, and preferably between 8 and 12 degrees; when the light guide tube When the length of the structure 104 is 2 feet, the light source module 102 has an illumination angle of less than 10 degrees, and preferably between 2 and Between 6 degrees; when the length of the light pipe structure 104 is 4 feet, the light source module 102 has an illumination angle of less than 5 degrees, and preferably between 1 and 3 degrees. However, the invention is not limited thereto.

The light pipe structure of the present invention is not limited to the above embodiment. The other embodiments and variations of the present invention are described in the following, and the same reference numerals will be used to refer to the same elements, and the repeated parts will not be described again.

Please refer to FIG. 4, which is a light guide tube structure 200 according to a second embodiment of the present invention. The difference from the first embodiment is that the diffusion structure 108 further includes a second diffusion layer 202 disposed on the outer surface 106b of the hollow light guiding body portion 106. That is to say, the light emitted by the light source module of the embodiment is not only uniformized by the first diffusion layer 110 but also uniformized by the second diffusion layer 202. Thereby, the uniformity of light generated by the lamp tube 200 of the present embodiment can be improved.

Please refer to FIG. 5, which is a light guide tube structure 300 according to a third embodiment of the present invention. The difference from the first embodiment is that the light guide tube structure 300 is not provided with the first diffusion layer on the inner surface of the hollow light guide body portion 106, and the second diffusion layer 302 of the diffusion structure 108 is disposed on the hollow light guide body portion. The outer surface 106b of the 106 causes the light emitted by the light source module to enter the hollow light guiding body portion 106 first, and then is uniformized by the second diffusion layer 302.

Please refer to FIG. 6, which is a light guide tube structure 400 according to a fourth embodiment of the present invention. The difference from the first embodiment is that the diffusion structure 108 includes a plurality of microstructures 402 disposed on the inner surface 106a of the hollow light guiding body portion 106. For example, each of the microstructures 402 may be a dot, and the dots may be arranged in a regular shape or an irregular shape, but the microstructure of the present invention is not limited thereto. In other embodiments, the diffusion structure may further include the first diffusion layer and the second diffusion layer of the first to third embodiments described above to combine the microstructure with the first diffusion layer and/or the second diffusion layer. Thereby, the light of the lamp tube can be more effectively homogenized.

Please refer to FIG. 7, which is a light guide tube structure 500 according to a fifth embodiment of the present invention. The difference from the fourth embodiment is that the microstructure 502 is disposed on the outer surface 106b of the hollow light guiding body portion 106. In other embodiments, the diffusion structure may further include the first diffusion layer, the second diffusion layer, and/or the micro-junction disposed on the inner surface of the hollow light guiding body portion of the first to fourth embodiments. The structure is configured to combine at least one of a microstructure disposed on an outer surface of the hollow light guiding body portion and a first diffusion layer, a second diffusion layer, and a microstructure disposed on an inner surface of the hollow light guiding body portion. Thereby, the light of the lamp tube can be more effectively homogenized.

Please refer to FIG. 8, which is a light guide tube structure 600 according to a sixth embodiment of the present invention. The difference from the first embodiment is that the diffusion structure 108 includes a plurality of diffusion particles 602 disposed in the hollow light guiding body portion 106. In other embodiments, the diffusion structure may further include the first diffusion layer, the second diffusion layer, and the microstructure disposed on the inner surface and the outer surface of the hollow light guiding body portion of the first to fifth embodiments. At least one of them to more evenly homogenize the light of the tube.

In summary, the lamp tube of the present invention uses a hollow light pipe structure, so that the middle portion of the light pipe structure is not easily bent or deformed by gravity images under long-term use, and the light pipe structure includes a diffusion structure. To evenly diffuse the light from the light source module. Moreover, the light source module uses a concentrating structure to focus the light emitted by the light source to reduce the light-emitting angle of the light. Thereby, the brightness of the light emitted from the middle portion of the light pipe structure can be approximately the same as the light output brightness at both ends of the adjacent light pipe structure, thereby uniformizing the brightness of the light pipe in the longitudinal direction.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

100‧‧‧ lamp

102‧‧‧Light source module

102a‧‧‧Glossy

104‧‧‧Light pipe structure

104a‧‧‧ openings

106‧‧‧ hollow light guide body

106a‧‧‧ inner surface

106b‧‧‧Outer surface

108‧‧‧Diffusion structure

110‧‧‧First diffusion layer

Claims (15)

A light pipe structure of a lamp tube, the lamp tube comprising at least one light source module disposed at at least one end of the light pipe structure, and the light pipe structure comprises: a hollow light guiding body portion including an inner surface and An outer surface, wherein the light enters the hollow light guiding body portion from the inner surface of the hollow light guiding body portion; and a diffusion structure disposed on the inner surface of the hollow light guiding body portion, the outer surface, and the At least one of the interior of the hollow light guiding body portion for diffusing the light. The light pipe structure of claim 1, wherein the diffusion structure comprises a first diffusion layer disposed on the inner surface of the hollow light guiding body portion. The light pipe structure of claim 1 or 2, wherein the diffusion structure comprises a second diffusion layer disposed on the outer surface of the hollow light guiding body portion. The light pipe structure of claim 1, wherein the diffusion structure comprises a plurality of microstructures disposed on at least one of the inner surface or the outer surface of the hollow light guiding body portion. The light guide tube structure of claim 1, wherein the diffusion structure comprises a plurality of diffusion particles disposed in the hollow light guide body portion. A lamp tube comprising: at least one light source module for generating a light; and a light pipe structure comprising: a hollow light guiding body portion including an inner surface and an outer surface, and the hollow light guiding body portion Each of the two ends has an opening, wherein the light is incident from the inner surface of the hollow light guiding body portion into the hollow light guiding body portion; A diffusion structure is disposed on at least one of the inner surface of the hollow light guiding body portion, the outer surface, and the interior of the hollow light guiding body portion for diffusing the light. The light pipe of claim 6, wherein the light source module comprises a light source and a light collecting structure, the light source module is disposed on at least one of the openings of the light pipe structure, and the light collecting structure It is disposed on one of the light-emitting surfaces of the light source. The lamp unit of claim 7, wherein the light source module further comprises a circuit board, and the light source is disposed on the circuit board. The lamp tube of claim 7, wherein the concentrating structure comprises a parabolic mirror and a lens, the light source is disposed at a bottom opening of the parabolic mirror, and the lens is disposed at a top opening of the parabolic mirror and located Directly above the light source. The lamp of claim 6, wherein the lamp comprises two sets of light source modules, and the two sets of light source modules are respectively disposed in the openings of the light pipe structure. The lamp of claim 6, wherein the light source module has an illumination angle of half the luminous intensity, between 2.5 degrees and 30 degrees. The lamp of claim 6, wherein the diffusion structure comprises a first diffusion layer disposed on the inner surface of the hollow light guiding body portion. The lamp of claim 6 or 12, wherein the diffusion structure comprises a second diffusion layer disposed on the outer surface of the hollow light guiding body portion. The lamp tube of claim 6, wherein the diffusion structure comprises a plurality of microstructures disposed on the The inner surface or the outer surface of the hollow light guiding body portion. The lamp tube of claim 6, wherein the diffusion structure comprises a plurality of diffusion particles disposed in the hollow light guiding body portion.