Light tube
A light tube includes a tube body, at least one light emitting diode, and a transparent cover. The light emitting diode is assembled with the tube body. The transparent cover is disposed on the tube body to cover the light emitting diode and has a roof portion and two side arm portions. A first microstructure region and a second microstructure region are formed on a surface of the roof portion corresponding to the light emitting diode. The second microstructure region extends from two ends of the first microstructure region. A third microstructure region is formed on a surface of each side arm portion corresponding to the light emitting diode. A microstructure density of the second microstructure region is less than or equal to a microstructure density of the first microstructure region, and is greater than or equal to a microstructure density of the third microstructure region.
1. A light tube comprising:
a tube body;
at least one light emitting diode assembled with the tube body; and
a transparent cover disposed on the tube body to cover the light emitting diode and having a roof portion and two side arm portions, a first microstructure region and a second microstructure region being formed on a surface of the roof portion corresponding to the light emitting diode, the second microstructure region extending from two ends of the first microstructure region, a third microstructure region being formed on a surface of each side arm portion corresponding to the light emitting diode, a microstructure density of the second microstructure region being less than or equal to a microstructure density of the first microstructure region and being greater than or equal to a microstructure density of the third microstructure region.
2. The light tube of claim 1 , wherein a central angle of the first microstructure region relative to the light emitting diode is less than or equal to 40°.
3. The light tube of claim 2 , wherein a sum of central angles of two sections of the second microstructure region respectively extending from two ends of the first microstructure region falls within a range between 41° and 80°.
4. The light tube of claim 1 , wherein the first microstructure region has a plurality of first sawtooth-shaped bar structures, the second microstructure region has a plurality of second sawtooth-shaped bar structures, and the third microstructure region has a plurality of third sawtooth-shaped bar structures.
5. The light tube of claim 4 , wherein a vertex angle of each first sawtooth-shaped bar structure falls within a range between 70° and 90° a vertex angle of each second sawtooth-shaped bar structure falls within a range between 90° and 120° and a vertex angle of each third sawtooth-shaped bar structure falls within a range between 120° and 150°.
6. The light tube of claim 1 , wherein the first microstructure region has a plurality of first arc-shaped bar structures, the second microstructure region has a plurality of second arc-shaped bar structures, and the third microstructure region has a plurality of third arc-shaped bar structures, a radius of each second arc-shaped bar structure is less than or equal to a radius of each first arc-shaped bar structure, and a radius of each third arc-shaped bar structure is less than or equal to the radius of each second arc-shaped bar structure.
7. The light tube of claim 1 , wherein the roof portion is an arc-shaped structure, and a radius of the roof portion falls within a range between 1 μm and 1000μ.
8. The light tube of claim 1 , wherein the roof portion is a planar structure.
9. The light tube of claim 1 , wherein the transparent cover is made of light scattering material with a haze greater than 70%.
10. A light tube comprising:
a tube body;
at least one light emitting diode assembled with the tube body; and
a transparent cover disposed on the tube body to cover the light emitting diode and having a roof portion and two side arm portions, a first microstructure region and a second microstructure region being formed on a surface of the roof portion corresponding to the light emitting diode, the second microstructure region extending from two ends of the first microstructure region, a third microstructure region being formed on a surface of each side arm portion corresponding to the light emitting diode, a microstructure density of the second microstructure region being less than a microstructure density of the first microstructure region and being greater than a microstructure density of the third microstructure region.
11. The light tube of claim 10 , wherein the first microstructure region has a plurality of first sawtooth-shaped bar structures, the second microstructure region has a plurality of second sawtooth-shaped bar structures, and the third microstructure region has a plurality of third sawtooth-shaped bar structures.
12. The light tube of claim 11 , wherein a vertex angle of each first sawtooth-shaped bar structure falls within a range between 70° and 90° a vertex angle of each second sawtooth-shaped bar structure falls within a range between 90° and 120° and a vertex angle of each third sawtooth-shaped bar structure falls within a range between 120° and 150°.
13. The light tube of claim 10 , wherein the roof portion is an arc-shaped structure, and a radius of the roof portion falls within a range between 1 μm and 1000 μm.
14. The light tube of claim 10 , wherein the roof portion is a planar structure.