Lamp tube

Abstract

The invention provides a lamp tube which comprises a lamp tube body, the lamp tube body is integrally formed in a double-color extrusion molding mode, and the lamp tube body comprises an upper half non-transparent part and a lower half light-transmitting part. The non-transparent part is provided with a light bar, and the light-emitting surface of the light bar faces the light-transmitting part; diffusion powder is added to the light-transmitting part in the double-color extrusion molding process; the light-transmitting part comprises a main light-emitting area and a semi-matte area; the main light-emitting area is arranged right below the light-emitting surface; the semi-foggy surface areas are arranged on the two sides of the main light-emitting area; a micro-tooth structure is arranged on the side wall of the semi-matte area; the problem that an existing fluorescent lamp cannot achieve beam angle adjustment is solved, beam shaping is achieved, and beams are concentrated under a lamp tube.

Description

Technical Field

[0001] The invention relates to a fluorescent lamp tube, in particular to a lamp tube. Background Art

[0002] Fluorescent tubes are light sources for large-area lighting, and are mainly used in lighting devices for public places such as factories, schools, offices, shopping malls, and homes. Traditional fluorescent lamps are mainly fluorescent lamps, and their internal working principle is that electron emission ionization excites fluorescence to produce light sources. Compared with traditional fluorescent lamps, the internal light sources of current fluorescent tubes are all LED lamp beads, which have higher luminous efficiency and longer lamp bead life. Especially in factories, fluorescent tubes are widely used. Through the coordination of rows of lamps between lamps, the number and efficiency of rows of lamps can be extremely well utilized. However, for the current fluorescent tubes whose internal light is all LED, the inner wall of the lamp tube has no optical microstructure, which cannot play the role of beam shaping and focusing, so the role of beam angle adjustment cannot be achieved. In addition, the minimum beam angle of ordinary fluorescent tubes must be greater than 120 degrees, and the maximum illumination of the lamp tube irradiating the ground directly below cannot be improved. Summary of the invention

[0003] The present invention aims to solve the problem that the existing fluorescent lamp cannot adjust the beam angle, and thus provides a lamp tube to achieve beam shaping so that the beam is concentrated directly below the lamp tube.

[0004] In order to solve the above technical problems, the present invention provides a lamp tube, including a lamp tube body, the lamp tube body is formed in one piece by two-color extrusion, and the lamp tube body includes an upper non-transparent part and a lower light-transmitting part;

[0005] The non-transparent part is provided with a light bar, the light-emitting surface of the light bar faces the light-transmitting part; the light-transmitting part is added with diffusion powder during the two-color extrusion process;

[0006] The light-transmitting portion includes a main light-emitting area and a semi-matte area; the main light-emitting area is arranged directly below the light-emitting surface; the semi-matte areas are arranged on both sides of the main light-emitting area; and a micro-tooth structure is arranged on the side wall of the semi-matte area.

[0007] In a preferred embodiment, the non-transparent part is made of non-transparent PC / ABS material; the light-transmitting part is made of a mixture of transparent PC material and diffusion powder; the proportion of the diffusion powder in the light-transmitting part is increased, and the light distribution angle of the light-transmitting part is increased.

[0008] In a preferred embodiment, the light distribution angle of the light-transmitting portion is set within the range of 75°-180°.

[0009] In a preferred embodiment, the non-transparent part is a rear shell, and the inner wall of the rear shell is a highly reflective smooth white paint surface; the light bar is installed inside the rear shell, and the light bar includes a PCB and a SMD LED.

[0010] In a preferred embodiment, a reflective arc surface is provided on the inner walls of both sides of the rear shell for connecting the semi-matte area.

[0011] In a preferred embodiment, the angle formed by the connection positions on both sides of the main light-emitting area and the light-emitting center of the lamp beads on the light strip is θ, and the connection positions are the positions where the main light-emitting area is connected to the semi-matte area; the angle θ is set at 30°≤θ≤90°.

[0012] In a preferred embodiment, the micro-tooth structure is a sawtooth structure, and the micro-tooth structures of the semi-matte areas on both sides are arranged in a mirror-symmetrical manner.

[0013] In a preferred embodiment, the micro-tooth structure is composed of a plurality of sawtooth units, and the incident edge angle between two adjacent sawtooth units is θ n , the incident edge angle θ n The angle is set at 5°≤θ n ≤10°.

[0014] In a preferred embodiment, the angle between the incident edge of the sawtooth unit and the side wall of the semi-matte area is α1, and the angle α1 is set in the range of 15°≤α1≤60°.

[0015] In a preferred embodiment, the incident edges of two adjacent sawtooth units are connected by a side edge; the included angle α2 between the incident edge of a single sawtooth unit and the side edge is set at 85°≤α2≤95°.

[0016] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0017] 1. Provide a two-color extruded integrated lamp tube, the upper part of the lamp tube is a non-transparent part, the lower part is a light-transmitting part, and a micro-tooth structure is set on the two side walls of the light-transmitting part. The micro-tooth structure mainly functions as a beam shaping, and the micro-tooth structure plays a role in aggregating the beam angle (light distribution angle), so that the light beam is concentrated as much as possible in the main light-emitting area.

[0018] 2.Diffusion powder is added to the light-transmitting part during the two-color extrusion process. The diffusion powder is mainly used to adjust the haze and transparency of the light-transmitting part. Different proportions of diffusion powder determine the different light distribution angles of the lamp tube, which can be adapted to different light distribution scenes.

[0019] 3. Add a very small amount of diffusion powder to the light-transmitting part, and the minimum light distribution angle of the lamp can reach about 75°. With the increase of diffusion powder, the maximum light distribution angle of the lamp can reach 180°. Therefore, by adjusting the proportion of diffusion powder, the average beam angle of the molded lamp can be adjusted within the range of 75°-180°. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A cross-sectional view of a lamp tube and a light bar in a preferred embodiment of the present invention;

[0021] Figure 2 A cross-sectional view of a two-color extruded lamp tube in a preferred embodiment of the present invention;

[0022] Figure 3 This is an enlarged view of the micro-tooth structure on both sides of the dual-color extruded lamp tube in the preferred embodiment of the present invention;

[0023] Figure 4 It is an enlarged view of a single-side micro-tooth structure and a sawtooth unit in a preferred embodiment of the present invention;

[0024] Figure 5 This is a diagram showing the overall structure of a lamp tube in a preferred embodiment of the present invention;

[0025] Figure 6 The light distribution curve corresponding to the diffused powder ratio of the transparent part of the lamp tube of the preferred embodiment of the present invention is 0.2 / 10000;

[0026] Figure 7 This is the light distribution curve corresponding to the diffused powder ratio of the transparent part of the lamp tube being 0.5 / 10000 in the preferred embodiment of the present invention;

[0027] Figure 8 The light distribution curve corresponding to the diffused powder ratio of the transparent part of the lamp tube being 1 / 10000 in the preferred embodiment of the present invention;

[0028] Fig. 9 The light distribution curve corresponding to the diffused powder ratio of the transparent part of the lamp tube being 2 / 10000 in the preferred embodiment of the present invention;

[0029] Fig.10 This is the light distribution curve corresponding to a light tube transparent part diffusion powder ratio of 3 / 10000 in a preferred embodiment of the present invention.

[0030] Explanation of the reference numerals: 1, light bar; 11, PCB; 12, SMD LED; 2, lamp tube; 21, left semi-matte area; 22, main light-emitting area; 23, right semi-matte area; 24, back shell; 241, left reflective arc surface; 242, right reflective arc surface; 3, center normal of lamp tube (virtual line). DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1 This embodiment provides a lamp tube, including a lamp tube 2 body, the lamp tube 2 body is formed by two-color extrusion, and the length of the lamp tube 2 can be customized. The lamp tube 2 body includes an upper non-transparent part and a lower light-transmitting part.

[0035] The upper non-transparent part is made of non-transparent PC / ABS material, and the non-transparent part is the rear shell 24, and the inner wall of the rear shell 24 is a highly reflective smooth white paint surface; the rear shell 24 is equipped with a light bar 1, and the light-emitting surface of the light bar 1 faces the light-transmitting part, and the light bar 1 includes a PCB 11 and a SMD LED 12 (such as Figure 1 ).

[0036] The lower part of the light-transmitting part is made of transparent PC material. Diffusion powder is added to the light-transmitting part during the two-color extrusion process. The light-transmitting part will become atomized or translucent, which can block the lamp beads and components and play a role in beautifying the lamp (such as Figure 5). In the two-color injection molding process, adding diffusion powder can make the lamp tube 2 become frosted. By mixing transparent PC material and diffusion powder, the proportion of the diffusion powder in the light-transmitting part increases, and the light distribution angle of the light-transmitting part increases. When the diffusion powder adjusts the frosting of the light-transmitting part, different proportions of diffusion powder determine different light distribution angles of the lamp tube 2, which can adapt to different light distribution scenes.

[0037] The light-transmitting part includes a main light-emitting area 22 and a semi-matte area; the main light-emitting area 22 is arranged directly below the light-emitting surface; the semi-matte area is arranged on both sides of the main light-emitting area 22, and is divided into a left semi-matte area 21 and a right semi-matte area 23, and a micro-tooth structure is arranged on the side walls of the left semi-matte area 21 and the right semi-matte area 23. The main function of the micro-tooth structure is to shape the light beam so that the light beam is concentrated as much as possible directly below the lamp tube 2.

[0038] The left semi-matte area 21 and the right semi-matte area 23 are connected to the main light-emitting area 22 and the upper non-transparent part on both sides, and the inner wall of the non-transparent rear shell 24 is used to connect the semi-matte area. A reflective arc surface is set on both sides of the non-transparent rear shell 24. The reflective arc surface mainly plays a role of reflecting and focusing. The left semi-matte area 21 and the right semi-matte surface are set to the left reflective arc surface 241 and the right reflective arc surface 242 (such as Figure 2 )

[0039] like Figure 2 , the angle formed by the connection position on both sides of the main light-emitting area 22 and the light-emitting center of the lamp beads on the light bar 1 is θ, and the connection position is the position where the main light-emitting area 22 is connected to the semi-matte area, and the angle θ is set at 30°≤θ≤90°. The semi-matte areas set on both sides of the main light-emitting area 22 are symmetrical along the normal line (virtual line) 3 of the center of the lamp tube, and the micro-tooth structure set on the semi-matte area is set mirror-symmetrically along the normal line (such as Figure 3 ).

[0040] In this embodiment, micro-tooth structures are arranged on the inner walls on both sides of the light-transmitting part of the lamp tube 2 to play the role of aggregating the beam angle (light distribution angle). By adding a very small amount of diffusion powder during the injection molding process, the minimum light distribution angle of the lamp tube 2 can reach about 75°. With the increase of diffusion powder, the maximum light distribution angle of the lamp tube 2 can reach 180°. Therefore, by adjusting the proportion of diffusion powder, the average beam angle of the molded lamp tube 2 can be adjusted within the range of 75°-180°. In order to ensure the uniformity of the overall ground or work surface, illumination and uniformity must be taken into account when arranging lamps. Based on the same input luminous flux, when the average beam angle is smaller, the maximum illumination below the lamp tube 2 is larger, and the lamps can be arranged more densely; based on the same input luminous flux, when the average beam angle is larger, the maximum illumination below the lamp tube 2 is smaller, and the lamps can be arranged more sparsely.

[0041] During the injection molding process, the light-transmitting part is accompanied by the addition of diffusion powder, which increases the haze of the light-emitting surface of the lamp tube 2. The haze of the lamp tube 2 can have two effects. The first effect is to block the lamp beads, and the second effect is to change the light distribution angle (beam angle). The higher the proportion of diffusion powder, the higher the haze of the lamp tube 2, and the larger the light distribution angle of the lamp tube 2. In this embodiment, the plane where the cross-sectional view of the lamp tube 2 is located is the C0° / 180° plane (such as Figure 1 ), the plane perpendicular to the cross section of lamp tube 2 (C0° / 180° plane) and passing through the normal is the C90° / 270° plane.

[0042] like Figure 4 The micro-tooth structure is a sawtooth structure, which mainly plays the role of beam shaping. The micro-tooth structure is composed of a plurality of sawtooth units, and the incident edge angle between two adjacent sawtooth units is θ n For example, the angle between the incident edges of the first and second sawtooth units is θ1, the angle between the incident edges of the second and third sawtooth units is θ2, the angle between the incident edges of the third and fourth sawtooth units is θ3, the angle between the incident edges of the fourth and fifth sawtooth units is θ4, the angle between the incident edges of the fifth and sixth sawtooth units is θ5, the angle between the incident edges of the (n-1)th and nth sawtooth units is θ n-1 , the angle between the incident edges of the nth and (n+1)th sawtooth units is θ n , for the incident edge angles θ1~θ n Angle setting requirements: 5°≤θ n ≤10°(n≥1).

[0043] like Figure 4 , take the enlargement of a local sawtooth unit as an example. The incident light is I1, the incoming light is I2, and the outgoing light is I3. Without adding diffusion powder, the incidence and refraction of the lens satisfy the law of refraction. According to the law of refraction, when light enters a dense medium from a light-sparse medium, the light will be deflected. The side wall of the semi-matte area is S1, the incident edge of the sawtooth unit is L1, and the side of the sawtooth unit is T1, which is the lower side connecting two adjacent sawtooth units. O1 is the normal of the incident edge, and O2 is the normal of the outgoing edge. The angle between the incident edge of the sawtooth unit and the side wall of the semi-matte area is α1, and the angle between the incident edge of the sawtooth unit and the side edge is α2. In order to ensure that the outgoing light I3 is deflected and contracted in the normal direction, the sawtooth part narrows the beam angle of the light distribution curve on the C0° / 180° plane. Therefore, the angle setting requirement for the angle α1 is: 15°≤α1≤60°. In order to ensure that the light emitted by the lamp bead is incident on the incident edge as much as possible, the angle α2 is set to: 85°≤α2≤95°.

[0044] The proportion of diffusion powder and the adjustment of light distribution curve are as follows:

[0045] like Figure 6 When the diffusion powder ratio (diffusion powder / transparent PC material) is 0.2 / 10000, the light distribution angle is 119°(C0° / 180°)×77°(C90° / 270°).

[0046] like Figure 7 When the diffusion powder ratio (diffusion powder / transparent PC material) is 0.5 / 10000, the light distribution angle is 103°(C0° / 180°)×79°(C90° / 270°).

[0047] like Figure 8 When the diffusion powder ratio (diffusion powder / transparent PC material) is 1 / 10000, the light distribution angle is 98°(C0° / 180°)×93°(C90° / 270°).

[0048] like Fig. 9 When the diffusion powder ratio (diffusion powder / transparent PC material) is 2 / 10000, the light distribution angle is 113° (C0° / 180°) × 146° (C90° / 270°).

[0049] like Fig.10 When the diffusion powder ratio (diffusion powder / transparent PC material) is 3 / 10000, the light distribution angle is 114°(C0° / 180°)×157°(C90° / 270°).

[0050] Table 1 below lists the simulation results corresponding to different diffusion powders. It can be seen from Table 1 that as the proportion of diffusion powder increases, the beam angle in the C90° / 270° plane gradually increases, and the maximum central illuminance at the 1m receiving surface gradually decreases. When considering illumination priority, in order to select a larger illumination below, it is more appropriate to choose a 119°×77° solution; when the illumination requirement is not high and a lamp 2 with a larger irradiation range is selected, it is more appropriate to choose a 114°×157° solution.

[0051] Therefore, based on the two-color extruded lamp tube 2 with a micro-tooth structure, different proportions of different diffusion powders determine different beam angles, which can be suitable for different scenarios.

[0052] Table 1 Simulation results of different diffusant ratios

[0053]

[0054] In addition, by Fig. 9 and 10It can be seen that when the ratio of diffusion powder to PC is greater than 0.02%, a small part of the light from the lamp tube 2 hits the back of the main light-emitting surface of the lamp tube 2, which means that the lamp tube 2 becomes a lamp tube 2 that emits light from top to bottom. When the lamp tube 2 is suspended and installed, the main light-emitting surface faces the bottom, and the light from the back hits the ceiling, which will create a better spatial lighting atmosphere.

[0055] The above is only a preferred specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the present invention within the technical scope disclosed by the present invention shall be deemed to infringe the protection scope of the present invention.

Claims

1. A lamp tube, characterized in that: It includes a lamp body, which is formed in one piece by two-color extrusion, and includes an upper non-transparent part and a lower light-transmitting part; The non-transparent part is provided with a light bar, the light-emitting surface of the light bar faces the light-transmitting part; the light-transmitting part is added with diffusion powder during the two-color extrusion process; The light-transmitting portion includes a main light-emitting area and a semi-matte area; the main light-emitting area is arranged directly below the light-emitting surface; the semi-matte areas are arranged on both sides of the main light-emitting area; and a micro-tooth structure is arranged on the side wall of the semi-matte area.

2. A lamp tube according to claim 1, characterized in that: The non-transparent part is made of non-transparent PC / ABS material; the light-transmitting part is made of a mixture of transparent PC material and diffusion powder; the proportion of the diffusion powder in the light-transmitting part is increased, and the light distribution angle of the light-transmitting part is increased.

3. A lamp tube according to claim 2, characterized in that: The light distribution angle of the light-transmitting part is set in the range of 75°-180°.

4. A lamp tube according to claim 2, characterized in that: The non-transparent part is a rear shell, and the inner wall of the rear shell is a highly reflective smooth white paint surface; the light bar is installed inside the rear shell, and the light bar includes a PCB and a SMD LED.

5. A lamp tube according to claim 4, characterized in that: The inner walls on both sides of the rear shell for connecting the semi-matte area are provided with a reflective arc surface.

6. The lamp tube according to claim 1, characterized in that: The angle formed by the connection positions on both sides of the main light-emitting area and the light-emitting center of the lamp beads on the light bar is θ, and the connection position is the position where the main light-emitting area is connected to the semi-matte area; the angle θ is set at 30°≤θ≤90°.

7. The lamp tube according to claim 1, characterized in that: The micro-tooth structure is a sawtooth structure, and the micro-tooth structures of the semi-matte areas on both sides are arranged in a mirror-symmetrical manner.

8. The lamp tube according to claim 7, characterized in that: The micro-tooth structure is composed of a plurality of sawtooth units, and the incident edge angle between two adjacent sawtooth units is θ n , the incident edge angle θ n The angle is set at 5°≤θ n ≤10°.

9. The lamp tube according to claim 8, characterized in that: The included angle between the incident edge of the sawtooth unit and the side wall of the semi-matte area is α1, and the included angle α1 is set in the range of 15°≤α1≤60°.

10. The lamp tube according to claim 9, characterized in that: The incident edges of two adjacent sawtooth units are connected by a side edge; the included angle α2 between the incident edge of a single sawtooth unit and the side edge is set at 85°≤α2≤95°.

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