TWM502782U - Micro tube structure - Google Patents

Description

Micro tube structure

The present invention relates to a lighting fixture, and more particularly to a miniature lamp structure in which a positive electrode portion and a negative electrode portion are disposed together on one of a first end portion and a second end portion.

The light-emitting diode has the advantages of high efficiency, long life and high reliability, and can be combined with different kinds of phosphor powder to emit light of different wavelengths and used as an illumination source. At present, the common fluorescent powder light-emitting diode light source mainly comprises a substrate, a light-emitting diode and a phosphor powder colloid. The light-emitting diode is usually disposed on the substrate, and the phosphor powder colloidally covers the light-emitting diode and the substrate. When the light emitting diode emits a light, the light passes through the phosphor powder colloid, and emits light of different wavelengths according to the type of the phosphor powder colloid.

When a light-emitting diode light source is used as the illumination light source, the light-emitting diode light source is usually disposed in the light cover. However, the thermal conductivity of the phosphor powder colloidal gel is low, which tends to cause poor heat dissipation of the light-emitting diode light source. This in turn may reduce the life of the product and increase the chance of the phosphor powder being exposed to heat.

In addition, when the light source is used as the illumination source, whether the emitted light is uniform will directly affect the user's visual experience. If the uniformity of the light emitted by the illumination source is not good, the user is likely to be caused. The vision produces fatigue.

Therefore, how to solve the above problems with the use of the light-emitting diode as illumination is one of the focuses of those skilled in the art.

In view of the above problems, the present invention provides a miniature lamp structure for providing The light-emitting diode source has good heat dissipation, thereby improving the life of the lighting fixture and further providing uniform light with uniform uniformity. At the same time, by providing the positive electrode portion and the negative electrode portion together on one of the first end portion and the second end portion of the micro-tube structure, the first end portion of the micro-tube structure and the first portion can be One of the two end portions is directly disposed on a circuit carrier.

In order to achieve the above object, an embodiment of the present invention provides a miniature lamp tube structure including a substrate unit, a light emitting unit, a fluorescent colloid, and an electrical connecting unit. The substrate unit has a first end portion and a second end portion disposed opposite to the first end portion. The light emitting unit is disposed on the substrate unit to emit a projected light, wherein the light emitting unit comprises at least one light emitting diode. The phosphor colloid is disposed on a transmission path of the projection light source. The electrical connection unit includes a positive electrode portion and a negative electrode portion, and the positive electrode portion and the negative electrode portion are disposed together with one of the first end portion and the second end portion on.

The beneficial effect of the present invention may be that the micro-tube structure provided by the present embodiment has a light-transmissive hollow tube for protecting the light-emitting diode and the fluorescent colloid, so that the micro-light of the present case is When the tube structure is disposed on a circuit carrier board having a lamp cover, the lamp cover can be open-ended, that is, an opening is formed in the lamp cover to expose the micro-tube structure located in the lamp cover, so that the micro-tube structure passes through the outside air. Convection, which in turn improves the heat dissipation efficiency of the miniature lamp structure. In addition, by providing both the positive electrode portion and the negative electrode portion on one of the first end portion and the second end portion of the micro-tube structure, the first end of the micro-tube structure can be One of the portion and the second end portion are directly disposed on a circuit carrier.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings are only for reference and description, and are not intended to limit the creation.

S, S’‧‧‧ miniature tube structure

1‧‧‧Substrate unit

11‧‧‧First end

111‧‧‧First electrical connection

112‧‧‧Second electrical connection

12‧‧‧second end

13‧‧‧Bend

2‧‧‧Lighting unit

21‧‧‧Lighting diode

22‧‧‧Flexible wire

3,3’‧‧‧Fluorescent colloid

31‧‧‧Fluorescent powder layer

32‧‧‧colloid layer

4‧‧‧Electrical connection unit

41‧‧‧ positive electrode section

42‧‧‧Negative electrode section

5‧‧‧Light transparent hollow tube

6‧‧‧Circuit carrier board

61‧‧‧Power input and output department

7‧‧‧shade

71‧‧‧ accommodating space

72‧‧‧ openings

8‧‧‧Power board

81‧‧‧Electrical connection slot

9‧‧‧Power base

91‧‧‧ lamp holder

92‧‧‧ lamp holder

C‧‧‧Insulating colloid

G‧‧‧ gap

1 is a perspective view (1) of a micro-lamp structure of a first embodiment of the present invention.

2 is a perspective view (2) of the micro-tube structure of the first embodiment of the present invention.

3 is a perspective view (3) of the micro-tube structure of the first embodiment of the present invention.

4 is a perspective view (4) of the micro-tube structure of the first embodiment of the present invention.

FIG. 5A is a perspective view showing the structure of a miniature lamp tube according to a second embodiment of the present invention.

FIG. 5B is a schematic cross-sectional view showing the structure of the micro-tube of the second embodiment of the present invention.

FIG. 5C is another schematic cross-sectional view showing the structure of the miniature lamp of the second embodiment of the present invention.

FIG. 5D is a schematic cross-sectional view showing the structure of the micro-lamp of the second embodiment of the present invention.

FIG. 6A is a perspective view showing one of the states of use of the micro-tube structure of the third embodiment of the present invention.

FIG. 6B is a perspective view showing another use state of the micro tube structure of the third embodiment of the present invention.

The following is a specific example to illustrate the implementation of the "micro-light tube structure" disclosed in the present application. Those skilled in the art can easily understand other advantages and effects of the present invention by the contents disclosed in the present specification. The present invention can also be implemented or applied by various other specific embodiments. The details of the present specification can also be modified and changed without departing from the spirit of the present invention. The drawing of this creation is only a brief description, and is not depicted in actual size, that is, the actual size of the relevant composition is not reflected, which will be described first. The following embodiments are intended to further explain the related technical content of the present invention, but are not intended to limit the technical scope of the present creation.

[First Embodiment]

First, referring to FIG. 1 to FIG. 3, FIG. 1 is a perspective view (1) of a micro-lamp structure according to a first embodiment of the present invention, and FIG. 2 is a perspective view of the micro-lamp structure of the first embodiment of the present invention. 2) FIG. 3 is a perspective view (3) of the micro-tube structure of the first embodiment of the present invention. The first embodiment of the present invention provides a miniature lamp tube structure S including a substrate unit 1, a light emitting unit 2, a fluorescent colloid 3, and an electrical Connect unit 4. Specifically, in the first embodiment of the present invention, the substrate unit 1 has an elongated shape, and the substrate unit 1 may have a first end portion 11 and a second end portion 12 disposed opposite to the first end portion 11 from each other. . The first end portion 11 and the second end portion 12 are opposite side ends of the substrate unit 1 that are far apart.

Then, the light emitting unit 2 can be disposed on the substrate unit 1 to emit a projected light, and the light emitting unit 2 can include at least one light emitting diode 21 . For example, the number of the light emitting diodes 21 may be plural, and the plurality of light emitting diodes 21 are sequentially arranged in the elongated substrate unit 1. The positive electrode portion 41 and the negative electrode portion 42 of the electrical connection unit 4 are electrically connected to the light-emitting unit 2 . In addition, the phosphor colloid 3 can be disposed on the transmission path of the projection light source emitted by the light emitting unit 2. In the first embodiment of the present invention, the number of the light-emitting diodes 21 is plural, and the number of the fluorescent colloids 3 may correspond to the number of the light-emitting diodes 21, and the fluorescent colloids 3 respectively cover the light-emitting diodes. The diode 21 has a gap G between the adjacent two phosphor colloids 3. Further, the electrical connection unit 4 may include a positive electrode portion 41 and a negative electrode portion 42. The positive electrode portion 41 and the negative electrode portion 42 of the electrical connection unit 4 are disposed together at the first end portion 11 and the second portion. The tip portion 12 is on one of the two.

It is worth mentioning that the micro-light tube structure S shown in FIG. 1 is that the packaged light-emitting diode 21 (that is, each of the light-emitting diodes 21 is first packaged with the fluorescent colloid 3) is adhered through the surface. The surface mount technology (SMT) is disposed on the substrate unit 1 and further electrically connected to the substrate unit 1. In addition to this, in the present creation, the substrate unit 1 is, for example, a printed circuit board (PCB), and the electrical connection unit 4 and the substrate unit 1 are, for example, integrally formed. In addition, the micro-lamp structure S shown in FIG. 2 is such that the light-emitting diode 21 is electrically connected to the substrate unit 1 by the conductive wire 22, and the fluorescent colloid 3 covers the light-emitting diode 21, the conductive line 22, and the substrate. Unit 1.

Next, as shown in FIG. 1 and FIG. 2, in one embodiment, the electrical connection unit 4 can be directly formed on one of the first end portion 11 and the second end portion 12 of the substrate unit 1, and The positive electrode portion 41 and the negative electrode portion 42 are directly disposed on Electrically connected to the unit 4. Thereby, the electrical connection unit 4 of the miniature lamp tube structure S provided by the first embodiment of the present invention can be directly inserted into a circuit board (not shown). In another embodiment, the substrate unit 1 can include a first electrical connection portion 111 and a second electrical connection portion 112. The positive electrode portion 41 is disposed on the first electrical connection portion 111, and the negative electrode portion 42 is disposed on the first electrical connection portion 111. The first electrical connection portion 111 and the second electrical connection portion 112 are spaced apart from each other by a predetermined distance. Thereby, the electrical connection unit 4 can be directly inserted on a corresponding circuit board (not shown). Further, as shown in FIG. 3 , the second electrical connection portion 112 is not directly connected to the substrate unit 1 , and the light-emitting diode 21 is electrically connected to the second electrical connection portion 112 .

Next, please refer to FIG. 4, which is a perspective view (4) of the micro-lamp structure of the first embodiment of the present invention. In another embodiment, the substrate unit 1 may have a bent portion 13 or a plurality of bent portions 13 at a predetermined position. Thereby, the direction of the projected light emitted by the light-emitting unit 2 can be changed by the bent portion 13 on the substrate unit 1.

The micro-tube structure S provided in the first embodiment of the present invention can be disposed on both the first end portion 11 and the second end portion 12 by the positive electrode portion 41 and the negative electrode portion 42 of the electrical connection unit 4 In one of them, only one end portion of the substrate unit 1 has an electrical connection unit 4. Therefore, in the first embodiment of the present invention, the electrical connection unit 4 located on the first end portion 11 can be directly inserted on a circuit board (not shown) and passed through the positive electrode portion 41 and negative. The electrode portion 42 is electrically connected to the circuit board to cause the light emitting unit 2 to generate a projected light.

[Second embodiment]

First, please refer to FIG. 5A to FIG. 5D, FIG. 5A is a perspective view showing the structure of the micro-tube of the second embodiment, and FIG. 5B is a schematic cross-sectional view showing the structure of the micro-tube of the second embodiment. FIG. 5C is another schematic cross-sectional view showing the structure of the miniature lamp of the second embodiment of the present invention. FIG. 5D is a schematic cross-sectional view showing the structure of the micro-lamp of the second embodiment of the present invention. It can be seen from the comparison between FIG. 5A and FIG. 1 to FIG. 4 that the difference between the second embodiment and the first embodiment is that the first embodiment provides The miniature tube structure S can be further used in conjunction with a light transmissive hollow tube 5. Further, the phosphor colloid 3' may be disposed on the inner side surface or the outer side surface of the light transmissive hollow tube 5.

In the second embodiment of the present invention, the micro tube structure S' provided by the second embodiment of the present invention may further include a transparent hollow tube 5, and the substrate unit 1 and the light emitting unit 2 are disposed in the light transmission. Inside the hollow tube 5. For example, the substrate unit 1 can be inserted and fixed in the transparent hollow tube 5, and the transparent hollow tube 5 can wrap around the substrate unit 1 360 degrees. Thereby, the projected light emitted by the light-emitting unit 2 can be formed by the fluorescent colloid 3 to form an outgoing light, and is emitted from the transparent hollow tube 5. It should be noted that, in the present embodiment, the material of the substrate unit 1 may be metal or a transparent conductive material, such as Indium Tin Oxide (ITO). When a transparent conductive material is used as the material of the substrate unit 1, since the substrate unit 1 is transparent, and the light-transmissive hollow tube 5 is 360 degrees around the light-emitting diode 21, the light emitted by the light-emitting diode 21 can be 360 degrees. Shot. That is to say, the light emitted by the LEDs 21 can be emitted not only from above, to the left or to the right of the LEDs 21 but also from below the LEDs 21, so that the entire micro-tube structure S can be 360 degree illumination.

Then, in the embodiment of the present invention, the material of the transparent hollow tube 5 may be a glass material, and the glass material can protect the substrate unit 1, the light-emitting unit 2, the fluorescent colloid 3, and the conductive wire 22 to reduce the outside. The moisture, dust, or the environment may cause damage to the user. In addition, the thermal conductivity of the transparent hollow tube 5 made of glass material is higher than that of the silicone used in the prior art, and the heat dissipation effect of the light-emitting unit 2 can be improved. However, in other embodiments, the material of the transparent hollow tube 5 may also be acrylic, glass or other light transmissive, high support force or a material having a better thermal conductivity. Limited.

5B to 5D, similar to the first embodiment, the micro-tube structure S' provided by the second embodiment includes a substrate unit 1, a light-emitting unit 2, a fluorescent colloid 3, and an electrical The unit 4 is connected, and the relative positional relationship of each element is also substantially the same as that of the first embodiment, and details are not described herein. In the second embodiment, the light emitting single The projected light emitted by the element 2 passes through the fluorescent colloid 3 and generates an outgoing light of a specific wavelength, and the emitted light is emitted from the transparent hollow tube 5 as a light source. The material of the fluorescent colloid 3 and the type of the light-emitting diode 21 in the light-emitting unit 2 are adjusted according to the wavelength requirement of the emitted light, and the present invention is not limited thereto. In other embodiments, the micro-tube structure S' may also be composed of two or more different types of light-emitting diodes 21, and emit light of two or more different wavelengths. The fluorescent colloid 3 may also be two or more different types of fluorescent colloids 3. When the light of the light-emitting diode 21 passes through two different kinds of the fluorescent colloid 3, the light is converted into two or more different wavelengths of the outgoing light. In addition, the light-transmissive hollow tube 5 may also have at least one color, and the light-emitting diode 21 may also be combined with the light-transmissive hollow tubes 5 of different colors to generate the emitted light of a specific wavelength. The number of types of the light-emitting diodes 21, the number of types of the fluorescent colloids 3, and the number of colors of the light-transmitting hollow tubes 5 can be adjusted in accordance with the wavelength requirements of the emitted light.

As shown in FIG. 5B, the phosphor colloid 3 may include a phosphor layer 31 and a colloid layer 32. The colloid layer 32 covers the substrate unit 1 and the light-emitting diode 21, and the phosphor layer 31 covers the surface of the colloid layer 32. The light emitted from the light-emitting diode 21 passes through the colloid layer 32 and the phosphor layer 31 to generate an outgoing light of a specific wavelength. Since the phosphor layer 31 and the light-emitting diode 21 further include a colloid layer 32 as a buffer, the phosphor layer 31 is far from the light-emitting diode 21. Therefore, the phosphor powder layer 31 is less susceptible to deterioration by the heat generated by the light-emitting diode 21, and the life of the phosphor powder layer 31 can be improved.

Next, as shown in FIGS. 5C and 5D, it is worth mentioning that the phosphor powder is practically easy to change the efficiency and brightness of the light by the influence of temperature under a long period of use. Therefore, the life of the fluorescent colloid 3' can be increased by changing the position of the fluorescent colloid 3'. For example, in the second embodiment of the present invention, the phosphor colloid 3' may be attached to the inner side surface or the outer side surface of the light transmissive hollow tube 5. The light emitted from the light-emitting diode 21 passes through the light-transmissive hollow tube 5 and the fluorescent colloid 3', and generates a light of a specific wavelength. In addition, when the light passes through the phosphor colloid 3', the light is refracted at the wall of the transparent hollow tube 5, and the adjacent phosphor colloid 3' is excited, thereby The emitted light can be emitted from the light-transmissive hollow tube 5 at 360 degrees. Further, when the phosphor colloid 3' is provided on the inner side surface or the outer side surface of the light transmissive hollow tube 5, the phosphor colloid 3' is far from the light emitting diode 21. Therefore, the phosphor powder in the phosphor colloid 3' is less susceptible to deterioration by the heat generated by the light-emitting diode 21. It is to be noted that, in the present embodiment, the phosphor colloid 3' may be attached to the inner and outer surfaces of the light-transmissive hollow tube 5.

The miniature lamp tube structure S' provided by the second embodiment of the present invention has a light-transmissive hollow tube 5 for protecting the light-emitting unit 2 and the fluorescent colloid (3, 3'). If the miniature lamp tube structure S' of the present invention is disposed on a circuit carrier board having a lamp cover, the lamp cover can be open-ended, that is, an opening is formed in the lamp cover, thereby exposing the miniature lamp tube structure S located in the lamp cover. ', the micro-tube structure S' is convected by the outside air, thereby improving the heat dissipation efficiency of the micro-tube structure S'.

[Third embodiment]

First, please refer to FIG. 6A and FIG. 6B. FIG. 6A is a perspective view showing one of the micro-tube structures of the third embodiment of the present invention, and FIG. 6B is another embodiment of the micro-tube structure of the third embodiment. Use the state stereo diagram. The miniature lamp tube structure S provided in the second embodiment of the present invention can be used in conjunction with a circuit carrier 6, a lamp cover 7, a power supply board 8, and a power supply base 9.

Specifically, the circuit carrier 6 is electrically connected to the power input/output portion 61, and the positive electrode portion 41 and the negative electrode portion 42 are electrically connected to the circuit carrier 6 to be electrically connected to the power input/output portion. The miniature lamp tube structure S' is electrically connected to the circuit carrier 6. The lamp cover 7 can have an accommodating space 71 and at least one opening 72. The micro tube structure S and the circuit carrier board 6 are both located in the accommodating space 71 of the lamp cover 7, and the opening 72 can expose the micro tube structure S'. It is worth mentioning that the shape of the circuit carrier 6 may vary depending on the design of the actual product or the angle at which the micro-tube structure S' is inclined, and is not limited to the configuration shown in the drawings.

In the above, the power board 8 can be disposed on the circuit carrier 6 and electrically connected to the power input/output portion 61. Specifically, the power board 8 is electrically connected to the slot 81. The power supply/output portion 61 of the circuit carrier 6 is inserted, and the power supply board 8 is electrically connected to the power supply/output portion 61 of the circuit carrier 6. The power base 9 includes a socket 91 and a base 92. One end of the lamp holder 91 is connected to the lamp cover 7 and is used to carry the micro lamp tube structure S, the circuit carrier board 6, and the power board 8. The base 92 is disposed at the other end of the socket 91 and electrically connected to the power board 8 . In the third embodiment of the present invention, the power board 8 is provided with, for example, an electronic component such as a transformer, a rectifier, or a controller. However, the present invention is not limited thereto, and the types of electronic components disposed on the power board 8 can be adapted to the actual situation. In addition to the demand for the product, the power board 8 can be integrated on the circuit board 6 in response to the actual product requirements. The base 92 of the power base 9 is, for example, E17, E27, E40, etc., but the present invention is not limited thereto, and the specifications of the base 92 may vary depending on the actual product requirements.

In the above, an insulating colloid C is disposed between the micro tube structure S′ and the circuit carrier 6 described in the third embodiment of the present invention. Specifically, the insulating colloid C is disposed on the circuit carrier 6 and the insulating colloid C is disposed. The connection between the miniature lamp tube structure S' and the circuit carrier board 6 is covered. In the present embodiment, the material of the insulating paste C may be, for example, a polymer resin, and the plurality of micro tube structures S' may be electrically insulated. In addition, the insulating colloid C can also protect the circuit carrier board 6, reducing the chance of moisture or electromagnetic interference (EMI) causing damage to the circuit carrier board 6.

In the above, the opening 72 of the lampshade 7 of the embodiment can be opened at the top of the lampshade or the wall. The micro tube structure S' located in the accommodating space 71 can be exposed. Therefore, the outside air can flow between the micro tube structures S', and the heat generated by the micro tube structure S' during illumination can be taken out to achieve the heat dissipating effect. It should be noted that the present invention does not limit the number of openings 72 opened on the lampshade 7, and the number of openings 72 can be increased or decreased according to the actual needs of the product. Further, the provision of the opening 72 of the globe 7 not only enhances the effect of dissipating heat from the auxiliary micro-tube structure S', but also reduces the amount of material used to manufacture the lampshade 7, thereby effectively reducing the manufacturing cost.

The use of the micro-tube structure S' provided by the third embodiment of the present invention, since the micro-tube structure S' may have a light-transmissive hollow tube 5 for protecting the light-emitting diode 21 And the fluorescent colloid 3, therefore, when the micro tube structure S' is disposed on the circuit carrier 6 having the lamp cover 7, the lamp cover 7 can be opened, that is, the opening 72 is formed on the lamp cover 7, Thereby, the micro tube structure S′ located in the lampshade 7 is exposed, so that the micro tube structure S′ is convected by the outside air, thereby improving the heat dissipation efficiency of the micro tube structure S′.

[Possible effects of the examples]

In summary, the beneficial effects of the present invention may be that the micro-tube structure S provided by the present embodiment can be used as the light-transmissive hollow tube 5 because the micro-tube structure (S, S') can be used. In order to protect the light-emitting diode 21 and the fluorescent colloid (3, 3'), if the micro-tube structure S is disposed on a circuit carrier 6 having the lamp cover 7, the lamp cover 7 can be open-ended. That is, an opening 72 is formed in the lampshade 7, thereby exposing the micro-tube structure (S, S') located in the lampshade 7, so that the micro-tube structure (S, S') is convected by the outside air, thereby improving the micro-light The heat dissipation efficiency of the tube structure S. In addition, by providing both the positive electrode portion 41 and the negative electrode portion 42 on one of the first end portion 11 and the second end portion 12 of the micro-tube structure (S, S'), One of the first end portion 11 and the second end portion 12 of the micro tube structure (S, S') may be directly inserted into a circuit carrier 6.

The above description is only a preferred and feasible embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. Therefore, any equivalent technical changes made by using the present specification and the contents of the schema are included in the scope of protection of the present creation. .

S‧‧‧Micro tube structure

1‧‧‧Substrate unit

11‧‧‧First end

12‧‧‧second end

2‧‧‧Lighting unit

4‧‧‧Electrical connection unit

41‧‧‧ positive electrode section

42‧‧‧Negative electrode section

G‧‧‧ gap

Claims (12)

A miniature lamp tube structure comprising: a substrate unit having a first end portion and a second end portion disposed opposite to the first end portion; a light emitting unit, the light emitting unit is disposed On the substrate unit, to emit a projected light, wherein the light emitting unit comprises at least one light emitting diode; a fluorescent colloid, the fluorescent colloid is disposed on the transmission path of the projection light source; and an electric The electrical connection unit includes a positive electrode portion and a negative electrode portion, and the positive electrode portion and the negative electrode portion are disposed together at the first end portion and the second end portion One of them. The micro-tube structure of claim 1, wherein the positive electrode portion and the negative electrode portion are electrically connected to the light-emitting unit. The micro-tube structure of claim 1, wherein the substrate unit comprises a first electrical connection portion and a second electrical connection portion, and the positive electrode portion is disposed on the first electrical connection portion. The negative electrode portion is disposed on the second electrical connection portion, wherein the first electrical connection portion and the second electrical connection portion are spaced apart from each other by a predetermined distance. The micro-tube structure of claim 1, wherein the substrate unit has a strip shape, at least one of the plurality of light-emitting diodes is plural, and the plurality of the light-emitting diodes are sequentially arranged in a strip. Shaped on the substrate unit. The micro-tube structure of claim 1, wherein the phosphor colloid is disposed on the substrate unit and covers at least one of the light-emitting diodes and the substrate unit. The micro-tube structure of claim 1, wherein the number of the at least one of the light-emitting diodes is plural, the number of the fluorescent colloids is plural, and the plurality of the fluorescent colloids respectively cover a plurality of The light-emitting diode has a gap between two adjacent phosphor colloids. The micro-tube structure of claim 1, further comprising a light-transmissive hollow tube, wherein the substrate unit and the light-emitting unit are disposed in the transparent hollow tube. The micro-tube structure of claim 1, further comprising a circuit carrier, wherein the positive electrode portion and the negative electrode portion are electrically connected to the circuit carrier, wherein the circuit carrier is electrically connected In a power supply output. The micro-tube structure of claim 1, wherein the phosphor colloid is disposed on the substrate unit, the phosphor colloid comprises a phosphor layer and a colloid layer, and the colloid layer covers the light-emitting layer a unit and the substrate unit, and the phosphor layer covers the colloid layer. The micro-tube structure of claim 7, wherein the phosphor colloid is disposed on an inner side surface or an outer side surface of the light transmissive hollow tube. The micro-tube structure of claim 7, wherein the light-emitting unit and the fluorescent colloid are sealed in the transparent hollow tube. The micro-tube structure of claim 1, wherein the substrate unit has a bent portion at a predetermined position.