TW201307744A - Light-emitting tube - Google Patents

Abstract

A light-emitting tube includes a tubal housing and a light emitting diode (LED) module. The tubal housing is made of opaque and heat-conducting materials. The surface of the tubal housing has a plurality of holes. The LED module, which is the light source of the light-emitting tube, is located on the inside of the tubal housing, and the light beams generated by the LED module are outputted through the plurality of holes.

Description

Illuminated tube

The present invention relates to a light-emitting tube, and more particularly to a light-emitting tube having a non-transparent material and having good thermal conductivity, and the light source is outputted by a plurality of perforations on the housing.

At present, the tubular light-emitting diode (LED) lamps are all made of LED strips and lampshades. The lampshades are usually made of atomized glass or atomized plastic. In order to dissipate heat, it must be in the upper half of the tube. A heat sink (such as aluminum, or iron or other alloy) is used as a part of the lamp tube. As shown in FIG. 1 , the light emitting diode lamp includes a heat sink 11 , a lamp cover 12 , an LED circuit board 13 , and an LED module . 14. The light 15 generated by the LED module 14 is output by the lamp cover 12.

The LED lamp of the tubular structure of Fig. 1 has the biggest disadvantage that only the light output in the lower half of the tubular range can not reach the structure of the current full-angle output of the fluorescent lamp, so that it cannot replace the ordinary fluorescent lamp in some places.

Therefore, an object of the present invention is to provide a light-emitting lamp tube which can achieve full-angle output and can simultaneously achieve the effect of heat dissipation.

The invention provides a light-emitting lamp tube, which comprises a tubular casing and a light-emitting diode module. The tubular housing is formed from a material that is non-transparent and thermally conductive, the surface of the tubular housing having a plurality of perforations. The light emitting diode module is disposed in the tubular casing as a light source of the light emitting tube, and the light generated by the light emitting diode module is output by the plurality of perforations.

One or more of the numbers mentioned in this specification include the number itself. It should be understood that the present disclosure discloses certain methods and processes for performing the disclosed functions. There are many structures related to the disclosed structures that perform the same functions, and the above structures generally achieve the same result.

The invention provides a light-emitting lamp tube, which uses a light-emitting diode (LED) as a light source, can achieve full-angle output, and can simultaneously achieve the effect of heat dissipation.

The main principle of the structure of the light-emitting tube is the method proposed by the applicant in the Taiwan patent application "Lighting Bulb" (Application No. 100123900), using an all-metal casing, on which a plurality of perforations are arranged as light. Output. This principle can also be applied to the structure of a light-emitting tube (commonly known as a fluorescent lamp). Please refer to FIG. 2 and FIG. 3. FIG. 2 is a schematic diagram of an embodiment of a light-emitting tube of the present invention, and FIG. 3 is a cross-sectional view of the light-emitting tube of FIG. The light-emitting tube comprises an LED circuit board 21, an LED module 22 and a tubular housing 23. The LED module 22 is disposed on the LED circuit board 21. The LED module 22 includes a plurality of LEDs, which may be a combination of white LEDs or LEDs of other colors (eg, red, green, blue, etc.). The LED module 22 is disposed at a position on the side of the tubular casing 23 such that the light generated by the LED emits light toward the inside of the tubular casing 23, and the heat conduction between the tubular casing 23 and the LED circuit board 21 is required. For example, the LED circuit board 21 can be fixed to the tubular housing through a heat sink to ensure good heat dissipation.

The surface of the tubular casing 23 is provided with a plurality of perforations 24, and the light generated by the LED module 22 is output by the plurality of perforations 24. In general, the diameter d of the plurality of perforations 24 and its spacing P need to be properly designed, and the aperture ratio a can be expressed as:

For example, if the pitch P is 1 mm and the diameter d is 0.8 mm, the opening ratio a is about 50%. The thickness of the tubular casing 23 is related to heat conduction. Generally, the thicker the thickness, the better the heat conduction, but the cost is also high. In this embodiment, the thickness of the tubular casing 23 may be less than 1 mm, and the tubular casing 23 may be formed of a metal material such as aluminum metal or copper metal, or an alloy material thereof as described above, or formed of a ceramic material. . In order to increase the output efficiency of the LED light, the inner layer of the tubular casing 23 is coated with a white material which is preferably light-reflective, and the higher the reflectivity, the better the barium sulfate which is the best-known white paint. Ba2SO4) or Teflon has a reflectance of 98% and a whiteness of 99%. Since the LED module is placed on the side of the tubular housing 23, the light output of the LED will be a uniform brightness output, as shown in Figure 3, with a brightness of I1 = I2 = I3.

As shown in Fig. 2, if the distribution of the plurality of perforations 24 of the tubular casing 23 is uniform, the light output of the device will also have a very uniform full-angle output, which is particularly effective as a general fluorescent lamp. Light output. In addition, in order to increase the appearance of the lamp casing and prevent electric shock, the outer side of the tubular casing is also coated with white paint or covered with a layer of light transmissive material, so that the entire lamp casing is uniformly pinkish white, and because of the electrical insulation of the coating. Sexual materials also prevent the risk of electric shock.

Please refer to FIG. 4 and FIG. 5. FIG. 4 is a schematic diagram of another embodiment of the light-emitting tube of the present invention, and FIG. 5 is a cross-sectional view of the light-emitting tube of FIG. In some specific situations, the illuminating tube is used for unidirectional illumination, and thus the illuminating tube of the present invention can be achieved by providing a non-uniform distribution of the plurality of perforations on the tubular housing to the surface of the tubular housing. As shown in FIG. 4, the light-emitting tube comprises an LED circuit board 41, an LED module 42, and a tubular housing 43. The surface of the tubular casing 43 is provided with a plurality of perforations 24, and the light generated by the LED module 22 is output by the plurality of perforations 44, and the plurality of perforations 44 are distributed only on the lower half of the tubular casing 43, and the upper half is not distributed. The perforations 44, as shown in FIG. 5, since the inside of the tubular casing 43 is coated with a reflective coating, the light generated by the LED module 42 will all be output by the perforations 44 distributed by the lower half of the tubular casing 43. Therefore, in the present embodiment, the light-emitting tube can obtain a brighter light output, but its output range is only on the lower half. In addition, when the cross-section of the tubular casing 43 is circular, the light can be more uniformly diffused in the tubular casing 43, but for a particular application, the cross-section of the tubular casing 43 can be designed as an arbitrary polygon.

As the light efficiency of LEDs is getting higher and higher, the future can reach 200lm/w, and the manufacturing and packaging technology of LEDs is getting higher and higher. Currently, the single LED package of 2~3W can reach 3~5 in the future. The single LED of the tile, so the general tubular lamp, in the future, can use a single or a few LED packaging to achieve 1000lm optical power, which is brighter than the general 20-watt fluorescent lamp. Therefore, in another embodiment of the present invention, how to use a single LED or a few LEDs to achieve a light-emitting tube is eliminated by using an LED light bar (LED Light-Bar) to reduce the number of LEDs. Problems such as inconsistent colors, easy to attenuate, resulting in unevenness, increased damage rate and many other shortcomings.

Please refer to FIG. 6. FIG. 6 is a schematic diagram of another embodiment of the light-emitting tube of the present invention. The light-emitting tube includes an LED circuit board 61, an LED module 62, a tubular housing 64, and a light guide bar 66. The LED circuit board 61 is disposed on the bottom surface 63 of the tubular housing 64. The LED module 62 is disposed on the LED circuit board 61. The connection between the LED circuit board 61, the LED module 62, and the bottom surface 63 of the tubular housing 64 must be Good heat transfer connection. In addition, a power input terminal (not shown) of the light-emitting tube is disposed on the bottom surface 63 of the tubular casing 64. The LED circuit board 61 is electrically connected to the power input terminal for providing power required for driving the LED module 62. . The light guiding rod 66 is disposed between the two bottom surfaces 63 of the tubular casing 64. The material of the light guiding rod 66 is made of a light transmissive material, such as plastic such as PMMA. The surface of the light guiding rod 66 is distributed with scattering points, and the scattering point can be Formed by the shape of pits or bumps, the density of the distribution will also vary with position.

The light of the LED module 62 placed on the LED circuit board 61 is mainly input through the light guiding rod 66, and the light is output through the scattering point of the light guiding rod 66, so that the light uniformity at each position is better. Light exiting through the light guide bar 66 is then output via a plurality of perforations 65 on the tubular housing 64. Since the output light of the light guiding rod 66 will be diffused multiple times by the highly reflective paint inside the tubular casing 64 and then output by the perforations 65, the light output of the entire tubular casing 64 will be very uniform.

On the other hand, since the heat of the LED module 62 will be transferred to the entire tubular casing 64 via the bottom surface 63 of the tubular casing 64, heat is dissipated via air convection, so that the entire heat dissipation effect is good, and the light output can reach the whole The light angle output is similar to the effect of a general fluorescent lamp.

In summary, the light-emitting tube of the present invention comprises a tubular casing and a light-emitting diode module. The tubular housing is formed from a material that is non-transparent and thermally conductive, the surface of the tubular housing having a plurality of perforations.

The light emitting diode module is disposed in the tubular casing as a light source of the light emitting tube, and the light generated by the light emitting diode module is output by the plurality of perforations. Therefore, the illuminating tube of the present invention can achieve uniform illuminating with good heat dissipation effect and full illuminating angle.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed. Therefore, the scope of the patented scope of the invention should be construed in the broadest

11. . . heat sink

12. . . lampshade

13. . . LED circuit board

14. . . LED module

15. . . Light output

twenty one. . . LED circuit board

twenty two. . . LED module

twenty three. . . Tubular housing

twenty four. . . perforation

I1, I2, I3. . . brightness

41. . . LED circuit board

42. . . LED module

43. . . Tubular housing

44. . . perforation

61. . . LED circuit board

62. . . LED module

63. . . Bottom of tubular housing

64. . . Tubular housing

65. . . perforation

66. . . Light guide

1 is a schematic view of a conventional tubular LED tube.

2 is a schematic view of an embodiment of a light-emitting tube of the present invention.

Figure 3 is a cross-sectional view of the light-emitting tube of Figure 2;

4 is a schematic view of another embodiment of a light-emitting tube of the present invention.

Figure 5 is a cross-sectional view of the light-emitting tube of Figure 4;

Fig. 6 is a schematic view showing another embodiment of the light-emitting tube of the present invention.

61. . . LED circuit board

62. . . led

63. . . Bottom of tubular housing

64. . . Tubular housing

65. . . perforation

66. . . Light guide

Claims (16)

A light-emitting tube comprising: a tubular casing formed of a material that is non-transparent and thermally conductive, the surface of the tubular casing having a plurality of perforations; and a light-emitting diode module disposed on the tubular casing The body is used as a light source of the light-emitting tube, and the light generated by the light-emitting diode module is output by the plurality of perforations. The illuminating light tube of claim 1, wherein the light emitting diode module is disposed on a side of the tubular casing and dissipates heat by the tubular casing. The light-emitting diode of claim 1, wherein the light-emitting diode module is disposed on a bottom surface of the tubular casing and is cooled by the tubular casing. The illuminating tube of claim 3, further comprising: a light guiding rod disposed between the two bottom surfaces of the tubular casing for guiding the light generated by the LED module The plurality of perforations are evenly output. The illuminating tube of claim 1, wherein the tubular casing has a circular cross section. The illuminating tube of claim 1, wherein the tubular casing has a cross section of an arbitrary shape. The illuminating tube of claim 1, further comprising: a circuit board for arranging the illuminating diode module, and having a heat conduction connection between the circuit board and the tubular housing. The illuminating light tube of claim 1, wherein the light emitting diode module comprises a white light emitting diode or a combination of a plurality of color light emitting diodes such as red, green, and blue, or a color combination thereof. The illuminating tube of claim 1, wherein the plurality of perforations have a diameter d and the spacing is P, and the opening ratio of the plurality of perforations . The illuminating tube of claim 1, wherein the plurality of perforations are evenly distributed on a surface of the tubular casing. The illuminating tube of claim 1, wherein the plurality of perforations are non-uniformly distributed on a surface of the tubular casing. The illuminating tube of claim 1, wherein the tubular casing is formed of a metal material such as aluminum metal or copper metal, or an alloy material thereof as described above. The illuminating tube of claim 1, wherein the tubular casing is formed of a ceramic material. The illuminating tube of claim 1, wherein the inner layer of the tubular casing is coated with a light-reflective white material. The illuminating tube of claim 1, wherein the outer layer of the tubular casing is coated with an electrically insulating material. The illuminating tube of claim 1, wherein the outer side of the tubular casing is covered with a layer of light transmissive material.