Lamp tube having multilayer optical medium structure

Abstract

To provide a lamp tube having a multilayer optical medium structure.SOLUTION: A lamp tube with a multilayer optical medium structure comprises an outer tube, an inner tube, and a light source substrate. The inner tube is installed inside the outer tube, and comprises a mounting seat, a first light adjustment part, a second light adjustment part, and a corrugated part. The mounting seat, the first light adjustment part, and the second light adjustment part are installed on an inner wall of the inner tube. The corrugated part and the mounting seat are installed between the first light adjustment part and the second light adjustment part. The light source substrate is installed on the mounting seat, and the corrugated part corresponds to one side of the light source substrate. The first light adjustment part has a plurality of first prism steps arranged in sequence, the second light adjustment part has a plurality of second prism steps arranged in sequence, and the corrugated part has a corrugated structure.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lamp tube, and more particularly to a lamp tube having a multi-layer optical medium structure. [Background technology]

[0002] Lamp tubes are common lighting devices and are widely used in offices, industrial facilities, commercial facilities, schools, etc. to provide a bright and comfortable environment, and their applications are extremely widespread. Technological advances have significantly improved the efficiency of lamp tubes. However, because traditional lamp tubes use a single-layer optical medium structure (single-layer globe) without any other optical adjustment mechanism, many shortcomings remain. For example, traditional lamp tubes are prone to serious light spots, reducing the lighting effect. Furthermore, traditional lamp tubes are prone to reduced light efficiency due to scattering caused by structural design and other factors. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE INVENTION An object of the present invention is to provide a lamp tube having a multi-layer optical medium structure. [Means for solving the problem]

[0004] According to one embodiment of the present invention, there is provided a lamp tube having a multilayer optical medium structure including an outer tube, an inner tube, and a light source substrate. The inner tube is installed within the outer tube and includes a mounting seat, a first light adjusting portion, a second light adjusting portion, and a corrugated portion. The mounting seat, the first light adjusting portion, and the second light adjusting portion are installed on the inner wall of the inner tube. The corrugated portion and the mounting seat are installed between the first light adjusting portion and the second light adjusting portion. The light source substrate is installed on the mounting seat, and the corrugated portion corresponds to one side of the light source substrate. The first light adjusting portion has a plurality of first prism steps arranged in sequence, the second light adjusting portion has a plurality of second prism steps arranged in sequence, and the corrugated portion has a corrugated structure.

[0005] In one embodiment, the outer tube is cylindrical.

[0006] In one embodiment, the corrugations are located on the inner or outer wall of the inner pipe.

[0007] In one embodiment, the corrugations are located on the inner and outer walls of the inner tube.

[0008] In one embodiment, the corrugated structure includes a plurality of protrusions, each of which has an upper end in the shape of an arc.

[0009] In one embodiment, the corrugated structure comprises a plurality of flat portions, the plurality of protrusions alternating with the plurality of flat portions.

[0010] In one embodiment, each first prism step has a first upper surface and a first lower surface connected to each other, the distance between the first upper surface and the light source substrate being smaller than the distance between the first lower surface and the light source substrate, and each second prism step has a second upper surface and a second lower surface connected to each other, the distance between the second upper surface and the light source substrate being smaller than the distance between the second lower surface and the light source substrate.

[0011] In one embodiment, the first upper surface is parallel to a vertical reference plane, the first lower surface is parallel to a horizontal reference plane, the second upper surface is parallel to the vertical reference plane, and the second lower surface is parallel to the horizontal reference plane.

[0012] In one embodiment, the first upper surface is not parallel to a vertical reference plane, the first lower surface is not parallel to a horizontal reference plane, the second upper surface is not parallel to the vertical reference plane, and the second lower surface is not parallel to the horizontal reference plane.

[0013] In one embodiment, the first light adjusting portion and the second light adjusting portion are inclined surfaces, and the corrugated portion is arc-shaped. [Effects of the Invention]

[0014] Based on the above, a lamp tube having a multi-layer optical medium structure according to an embodiment of the present invention may have one or more of the following advantages. (1) In one embodiment of the present invention, a lamp tube includes an outer tube, an inner tube, and a light source substrate. The inner tube is installed inside the outer tube and includes a mounting base, a first light adjusting portion, a second light adjusting portion, and a corrugated portion. The mounting base, a first dimming unit, and a second dimming unit are installed on the inner wall of the inner tube. The corrugated portion and the mounting base are installed between the first light adjusting portion and the second light adjusting portion. The light source substrate is installed on the mounting base, and the corrugated portion corresponds to one side of the light source substrate. The first light adjusting portion has a plurality of first prism steps arranged in sequence, the second light adjusting portion has a plurality of second prism steps arranged in sequence, and the corrugated portion has a corrugated structure. As can be seen from the above, the lamp tube includes an outer tube and a recessed inner tube, forming a multi-layer optical medium structure (a two-layer globe). This multi-layer optical medium structure allows light emitted from the light source substrate to be refracted twice, generating a focusing function, effectively increasing the illuminance in a specific direction (the direction of the corrugated portion) and significantly improving the lighting effect of the lamp tube. The above wave structure can also diffuse the light evenly and make the light more uniform. (2) In one embodiment of the present invention, the first and second light adjusting sections of the inner tube of the lamp tube have a special structural design. The first light adjusting section has a plurality of first prism steps arranged in sequence, and the second light adjusting section has a plurality of second prism steps arranged in sequence. Each first prism step has a first upper surface and a first lower surface connected to each other. The distance between the first upper surface and the light source substrate is smaller than the distance between the first lower surface and the light source substrate. Each second prism step has a second upper surface and a second lower surface connected to each other. The distance between the second upper surface and the light source substrate is smaller than the distance between the second lower surface and the light source substrate. The structural design of the first and second light adjusting sections effectively concentrates the light emitted from the light source substrate in the direction of the corrugated section, improving the luminous efficiency of the lamp tube. This significantly improves the lamp's performance. (3) In one embodiment of the present invention, the first and second light-adjusting parts of the inner tube of the lamp tube have a special structural design, which makes the first and second light-adjusting parts sawtooth, effectively elongating the light spot generated by the light beam from the light source board, and preventing users from experiencing glare or other discomfort caused by the light spot. This greatly improves the visual effect of the light beam from the lamp tube, effectively improving environmental comfort, broadening the application range of the lamp tube, and making it more flexible to use. (4) In one embodiment of the present invention, the corrugated portion of the inner tube of the lamp tube has a corrugated structure, which includes a plurality of protrusions and a plurality of flat portions. The protrusions and the flat portions are alternately arranged. The upper end of each protrusion is arc-shaped. As can be seen from the above, the corrugated structure of the corrugated portion has the protrusions and the flat portions alternately arranged, which can greatly reduce the scattering phenomenon and reduce the loss of light passing through the corrugated portion. Therefore, the light efficiency of the lamp tube is further improved, which can meet the requirements of practical applications. (5) In one embodiment of the present invention, the first and second light adjusting portions of the inner tube of the lamp tube are inclined surfaces, and the corrugated portion is arc-shaped. The first upper surface of each first prism step is parallel to the vertical reference plane, and the first lower surface of each first prism step is parallel to the horizontal reference plane. The second upper surface of each second prism step is parallel to the vertical reference plane, and the second lower surface of each second prism step is parallel to the horizontal reference plane. In this way, the first and second light adjusting portions can be stepped. This structural design can improve the light-gathering function, thereby further increasing the illuminance in a specific direction (the direction of the corrugated portion) and further improving the lighting effect of the lamp tube. (6) In one embodiment of the present invention, the lamp tube can achieve the aforementioned multi-layer optical medium structure through a simple structural design, and the multi-layer optical medium structure can effectively improve the light efficiency, lighting effect, and visual effect of the lamp tube. In this way, the lamp tube can achieve the desired effect without significantly increasing the cost, improve the practicality of the lamp tube, better meet the needs of different applications, and adapt to future development trends. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a perspective view of a lamp tube having a multi-layer optical medium structure according to a first embodiment of the present invention; [Figure 2] 1 is a cross-sectional view of a lamp tube having a multi-layer optical medium structure according to a first embodiment of the present invention; [Figure 3] 3 is an explanatory diagram of a first prism step of a first light adjusting part of a lamp tube having a multilayer optical medium structure according to a first embodiment of the present invention; FIG. [Figure 4] 1 is an explanatory diagram of the corrugated structure of the corrugated portion of the lamp tube having the multilayer optical medium structure according to the first embodiment of the present invention; [Figure 5] 4 is an explanatory diagram of the operation state of a lamp tube having a multi-layer optical medium structure according to the second embodiment of the present invention; FIG. [Figure 6] FIG. 10 is a cross-sectional view of a lamp tube having a multi-layer optical medium structure according to a third embodiment of the present invention. [Figure 7] 10 is an explanatory diagram of the operation state of a lamp tube having a multi-layer optical medium structure according to the third embodiment of the present invention; FIG. [Figure 8] FIG. 10 is a cross-sectional view of a lamp tube having a multi-layer optical medium structure according to a fourth embodiment of the present invention. [Figure 9] 10 is an explanatory diagram of a first prism step of a first light adjusting part of a lamp tube having a multilayer optical medium structure according to a fourth embodiment of the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] In the following embodiments, detailed features and advantages of the present invention are described, the contents of which are sufficient to enable those skilled in the art to understand the technical contents of the present invention and implement them accordingly, and the disclosure contents, claims and drawings of this specification allow those skilled in the art to easily understand the objectives and advantages of the present invention.

[0017] Hereinafter, embodiments of a lamp tube having a multilayer optical medium structure of the present invention will be described with reference to the relevant drawings. For clarity and ease of description in the drawings, the dimensions and proportions of each element in the drawings may be exaggerated or reduced. In the following description and / or claims, when an element is described as being "connected" or "coupled" to another element, this may be directly connected or coupled to the other element, or an intermediate element may be present. When an element is described as being "directly connected" or "directly coupled" to another element, this does not mean that an intermediate element is present, and other terms used to describe the relationship between elements or layers should be interpreted similarly. For ease of understanding, the same elements in the following embodiments will be denoted and described with the same reference numerals.

[0018] Please refer to Figures 1, 2, 3 and 4. Figure 1 is a perspective view of a lamp tube having a multilayer optical medium structure according to a first embodiment of the present invention. Figure 2 is a cross-sectional view of a lamp tube having a multilayer optical medium structure according to a first embodiment of the present invention. Figure 3 is an explanatory diagram of a first prism step of a first light adjusting section of a lamp tube having a multilayer optical medium structure according to a first embodiment of the present invention. Figure 4 is an explanatory diagram of a corrugated structure of a corrugated section of a lamp tube having a multilayer optical medium structure according to a first embodiment of the present invention. The lamp tube 1 includes two lamp holders 11, an outer tube 12, an inner tube 13 and a light source substrate 14.

[0019] The outer tube 12 is cylindrical. In this embodiment, the outer tube 12 may be made of glass. In another embodiment, the outer tube 12 may be made of plastic or other transparent or translucent material.

[0020] The inner tube 13 is installed inside the outer tube 12. The inner tube 13 includes a mounting seat 131, a first light adjusting portion 132A, a second light adjusting portion 132B, and a corrugated portion 133. The mounting seat 131, the first light adjusting portion 132A, and the second light adjusting portion 132B are provided on the inner wall of the inner tube 13. The corrugated portion 133 is installed between the first light adjusting portion 132A and the second light adjusting portion 132B. The mounting seat 131 is installed between the first light adjusting portion 132A and the second light adjusting portion 132B and faces the corrugated portion 133. In this manner, the corrugated portion 133 corresponds to one side of the light source substrate 14 (the corrugated portion 133 faces the light exit surface LS of the light source substrate 14). In this embodiment, the inner tube 13 is made of glass and may contain a diffusing agent. In another embodiment, the inner tube 13 may be made of plastic or other transparent or translucent materials.

[0021] The light source board 14 is installed on the mounting seat 131 of the inner tube 13, and includes a circuit board 141 and a plurality of light emitting diodes 142 (only one is shown in the figure).

[0022] The two lamp holders 11 are respectively installed at both ends of the outer tube 12. One of the lamp holders 11 is provided with a power supply module (not shown), which is connected to the light source board 14 to drive the light source board 14. The circuit structure of the power supply module should be well known to those skilled in the art, and will not be described in detail here.

[0023] The inner tube 13 has a special optical structure design. The first light adjusting portion 132A and the second light adjusting portion 132B are arc-shaped. The first light adjusting portion 132A has a plurality of first prism steps S1 arranged in sequence. The second light adjusting portion 132B has a plurality of second prism steps S2 arranged in sequence. Each first prism step S1 has a first upper surface c1, a first lower surface b1, and a bottom surface a1 that are interconnected (in this embodiment, the side of the first prism step S1 farthest from the light source substrate 14 is defined as the bottom surface a1, and the other two sides of the first prism step S1 are defined as the first upper surface c1 and the first lower surface b1). The distance between the first upper surface c1 and the light source substrate 14 is shorter than the distance between the first lower surface b1 and the light source substrate 14. Similarly, each second prism step S2 has a second upper surface and a second lower surface connected to each other, and the distance between the second upper surface and the light source substrate 14 is smaller than the distance between the second lower surface and the light source substrate 14. The first upper surface c1 is not parallel to the vertical reference plane VR, and the first lower surface b1 is not parallel to the horizontal reference plane HR. The second upper surface is not parallel to the vertical reference plane VR, and the second lower surface is not parallel to the horizontal reference plane HR (the vertical reference plane VR is perpendicular to the light exit surface LS of the light source substrate 14, and the horizontal reference plane HR is parallel to the light exit surface LS of the light source substrate 14). The angle of the first prism step S1 with respect to the central axis X1 of the light source substrate 14 is greater than 90° (θ1>90°). The structure of the first prism step S1 is the same as the structure of the second prism step S2, so only the structure of the first prism step S1 will be described in this embodiment.

[0024] The corrugated portion 133 has a corrugated structure and is arc-shaped. In this embodiment, the corrugated portion 133 is disposed on the inner wall of the inner pipe 13. In another embodiment, the corrugated portion 133 may also be disposed on the outer wall of the inner pipe 13. In yet another embodiment, the corrugated portion 133 may be disposed on both the outer and inner walls of the inner pipe 13. The corrugated structure includes a plurality of protruding portions P1 and a plurality of flat portions P2. The plurality of protruding portions P1 and the plurality of flat portions P2 are alternately arranged. The upper end of each protruding portion P1 is arc-shaped. In this embodiment, the width of the protruding portion P1 may be equal to the width of the flat portion P2. In another embodiment, the width of the protruding portion P1 may be greater than the width of the flat portion P2. In yet another embodiment, the width of the protruding portion P1 may be smaller than the width of the flat portion P2, and the corrugated structure may include only the plurality of protruding portions P1 and not the flat portion P2.

[0025] Only a small portion of the light beams emitted from the light source substrate 14 pass through the upper half of the first light adjusting unit 132A and the second light adjusting unit 132B. The plurality of first prism steps S1 of the first light adjusting unit 132A and the plurality of second prism steps S2 of the second light adjusting unit 132B effectively elongate the light spot generated by the light beams, preventing the user from experiencing dazzle or other discomfort due to the light spot. A portion of the light beams emitted from the light source substrate 14 pass through the lower half of the first light adjusting unit 132A and the second light adjusting unit 132B. The plurality of first prism steps S1 of the first light adjusting unit 132A and the plurality of second prism steps S2 of the second light adjusting unit 132B can also effectively elongate the light spot generated by the light beams. At the same time, the plurality of first prism steps S1 of the first light-adjusting unit 132A and the plurality of second prism steps S2 of the second light-adjusting unit 132B can refract the light emitted from the light source substrate 14 and effectively focus it toward the corrugated portion 133. Most of the light emitted from the light source substrate 14 passes through the corrugated portion 133. The corrugated structure of the corrugated portion 133 has the plurality of protrusions P1 and the plurality of flat portions P2 arranged alternately, which can significantly reduce scattering and reduce the loss of light passing through the corrugated portion 133. The corrugated structure can also diffuse the light uniformly, making the light more uniform. The light emitted from the light source substrate 14 passes through the inner tube 13 and then the outer tube 12, and the outer tube 12 can refract the light emitted from the light source substrate 14 and focus it toward the corrugated portion 133.

[0026] As can be seen from the above, in this embodiment, the first light adjusting portion 132A and the second light adjusting portion 132B of the inner tube 13 of the lamp tube 1 have a special structural design. The first light adjusting portion 132A has a plurality of first prism steps S1 arranged in sequence, and the second light adjusting portion 132B has a plurality of second prism steps S2 arranged in sequence. Each first prism step S1 has a first upper surface c1 and a first lower surface b1 connected to each other. The distance between the first upper surface c1 and the light source substrate 14 is smaller than the distance between the first lower surface b1 and the light source substrate 14. Each second prism step S2 has a second upper surface and a second lower surface connected to each other. The distance between the second upper surface and the light source substrate 14 is smaller than the distance between the second lower surface and the light source substrate 14. The structural design of the first light adjusting part 132A and the second light adjusting part 132B can effectively concentrate the light emitted from the light source substrate 14 in the direction of the corrugated part 133, thereby improving the light efficiency of the lamp tube 1. Therefore, the efficiency of the lamp tube 1 is greatly improved.

[0027] In addition, in this embodiment, the first light adjusting part 132A and the second light adjusting part 132B of the inner tube 13 of the lamp tube 1 have a special structural design, which makes the first light adjusting part 132A and the second light adjusting part 132B sawtooth, which can effectively elongate the light spot generated by the light beam from the light source board 14 and prevent the user from feeling dazzled or other discomfort caused by the light spot. Therefore, the visual effect of the light beam from the lamp tube 1 is greatly improved, the environmental comfort is effectively improved, the application range of the lamp tube 1 is expanded, and the usage flexibility is increased.

[0028] In addition, in this embodiment, the corrugated portion 133 of the inner tube 13 of the lamp tube 1 has a corrugated structure, which includes a plurality of protrusions P1 and a plurality of flat portions P2. The protrusions P1 and the flat portions P2 are arranged alternately. The upper end of each protrusion P1 is arc-shaped. As can be seen from the above, the corrugated structure of the corrugated portion 133 includes a plurality of alternating protrusions P1 and a plurality of flat portions P2, which can greatly reduce the scattering phenomenon and reduce the loss of light passing through the corrugated portion 133. This can further improve the light efficiency of the lamp tube 1 and meet the requirements of practical applications.

[0029] Therefore, the lamp tube 1 can achieve the above-mentioned multi-layer optical medium structure (combination of the outer tube 12 and the inner tube 13) with a simple structural design. The first light-adjusting portion 132A of the inner tube 13 has a plurality of sequentially arranged first prism steps S1, and the second light-adjusting portion 132B of the inner tube 13 has a plurality of sequentially arranged second prism steps S2. The corrugated portion 133 of the inner tube 13 has a corrugated structure, so that the structural design of the inner tube 13 is a multi-functional composite microstructure design. Therefore, the above-mentioned multi-layer optical medium structure can effectively improve the light efficiency, lighting effect, and visual effect of the lamp tube 1.

[0030] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lamp tube having the multi-layer optical medium structure of this embodiment should still fall within the protection scope of the present invention.

[0031] FIG. 5 is an explanatory diagram of the operating state of a lamp tube having a multilayer optical medium structure according to a second embodiment of the present invention. As shown in FIG. 5, in this embodiment, the corrugated structure of the corrugated portion 133 of the inner tube 13 only has protrusions P1. When light passes through the corrugated portion 133 of the inner tube 13, it is refracted by the corrugated portion 133 and the diffusing agent DA therein. At the same time, the corrugated portion 133 significantly reduces scattering, reducing the loss of light passing through the corrugated portion 133. Then, when the light passes through the outer tube 12, the outer tube 12 refracts the light emitted from the light source substrate 14 and focuses it back toward the corrugated portion 133. The path of the light is indicated by an arrow AR1 in the figure.

[0032] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lamp tube having the multi-layer optical medium structure of this embodiment should still fall within the protection scope of the present invention.

[0033] Furthermore, conventional lamp tubes have a single-layer optical medium structure (single-layer globe) without any other optical adjustment mechanism, so there are still many shortcomings that need to be improved. For example, conventional lamp tubes are prone to generating severe light spots, reducing the lighting effect. Furthermore, conventional lamp tubes are prone to reduced light efficiency due to scattering due to factors such as structural design. In contrast, according to an embodiment of the present invention, a lamp tube includes an outer tube, an inner tube, and a light source substrate. The inner tube is installed within the outer tube and includes a mounting base, a first light adjusting portion, a second light adjusting portion, and a corrugated portion. The mounting base, a first dimming unit, and a second dimming unit are installed on the inner wall of the inner tube. The corrugated portion and the mounting base are installed between the first light adjusting portion and the second light adjusting portion. The light source substrate is installed on the mounting base, and the corrugated portion corresponds to one side of the light source substrate. The first light adjusting portion has a plurality of first prism steps arranged in sequence, the second light adjusting portion has a plurality of second prism steps arranged in sequence, and the corrugated portion has a corrugated structure. As can be seen from the above, the lamp tube includes an outer tube and a recessed inner tube, forming a multi-layer optical medium structure (double-layer globe), which allows the light emitted from the light source substrate to be refracted twice to generate a focusing function, effectively increasing the illuminance in a specific direction (the direction of the corrugated portion), and greatly improving the lighting effect of the lamp tube.

[0034] According to an embodiment of the present invention, the first and second light adjusting sections of the inner tube of the lamp tube have a special structural design. The first light adjusting section has a plurality of sequentially arranged first prism steps, and the second light adjusting section has a plurality of sequentially arranged second prism steps. Each first prism step has a first upper surface and a first lower surface connected to each other. The distance between the first upper surface and the light source substrate is smaller than the distance between the first lower surface and the light source substrate. Each second prism step has a second upper surface and a second lower surface connected to each other. The distance between the second upper surface and the light source substrate is smaller than the distance between the second lower surface and the light source substrate. The structural design of the first and second light adjusting sections effectively concentrates the light emitted from the light source substrate toward the corrugated section, improving the light efficiency of the lamp tube. This significantly improves lamp performance. The corrugated structure also allows the light to be diffused evenly, making the light more uniform.

[0035] In addition, according to an embodiment of the present invention, the first and second light-adjusting parts of the inner tube of the lamp tube have a special structural design, which makes the first and second light-adjusting parts sawtooth, effectively elongating the light spot generated by the light beam from the light source board, and preventing users from experiencing glare or other discomfort caused by the light spot, thereby greatly improving the visual effect of the light beam from the lamp tube, effectively improving environmental comfort, widening the application range of the lamp tube, and making it more flexible in use.

[0036] Furthermore, according to an embodiment of the present invention, the corrugated portion of the inner tube of the lamp tube has a corrugated structure, which includes a plurality of protrusions and a plurality of flat portions. The protrusions and the flat portions are alternately arranged. The upper end of each protrusion is arc-shaped. As can be seen from the above, the corrugated structure of the corrugated portion has the alternating protrusions and flat portions, which can greatly reduce the scattering phenomenon and reduce the loss of light passing through the corrugated portion. Therefore, the light efficiency of the lamp tube is further improved, which can meet the requirements of practical applications.

[0037] According to an embodiment of the present invention, the first and second light adjusting portions of the inner tube of the lamp tube are inclined surfaces, and the corrugated portion is arc-shaped. The first upper surface of each first prism step is parallel to the vertical reference plane, and the first lower surface of each first prism step is parallel to the horizontal reference plane. The second upper surface of each second prism step is parallel to the vertical reference plane, and the second lower surface of each second prism step is parallel to the horizontal reference plane. In this way, the first and second light adjusting portions can be stepped. This structural design can improve the light-gathering function, thereby further increasing the illuminance in a specific direction (the direction of the corrugated portion) and further improving the lighting effect of the lamp tube.

[0038] Furthermore, according to the embodiment of the present invention, the lamp tube can achieve the above-mentioned multi-layer optical medium structure with a simple structural design, and the multi-layer optical medium structure can effectively improve the light efficiency, lighting effect, and visual effect of the lamp tube. In this way, the lamp tube can achieve the desired effects without significantly increasing costs, improve the practicality of the lamp tube, better meet the needs of different applications, and adapt to future development trends. From the above, it can be seen that the lamp tube with the multi-layer optical medium structure according to the embodiment of the present invention can indeed achieve excellent technical effects.

[0039] 6 is a cross-sectional view of a lamp tube having a multi-layer optical medium structure according to a third embodiment of the present invention. Also refer to FIG. 1. As shown in the figure, the lamp tube 1 includes two lamp holders 11, an outer tube 12, an inner tube 13, and a light source substrate 14.

[0040] The outer tube 12 is cylindrical. The inner tube 13 is installed inside the outer tube 12. The inner tube 13 includes a mounting seat 131, a first light adjusting portion 132A, a second light adjusting portion 132B, and a corrugated portion 133. The mounting seat 131, the first light adjusting portion 132A, and the second light adjusting portion 132B are provided on the inner wall of the inner tube 13. The corrugated portion 133 is installed between the first light adjusting portion 132A and the second light adjusting portion 132B. The mounting seat 131 is installed between the first light adjusting portion 132A and the second light adjusting portion 132B and faces the corrugated portion 133. In this way, the corrugated portion 133 corresponds to one side of the light source substrate 14 (the corrugated portion 133 faces the light exit surface LS of the light source substrate 14).

[0041] The light source board 14 is installed on the mounting seat 131 of the inner tube 13 and includes a circuit board 141 and a plurality of light emitting diodes 142 .

[0042] The two lamp holders 11 are respectively installed at both ends of the outer tube 12. One of the lamp holders 11 is provided with a power supply module (not shown), which is connected to the light source board 14 to drive the light source board 14.

[0043] The above components are similar to those of the previous embodiment and will not be described in detail here. Unlike the previous embodiment, the inner tube 13 of this embodiment has a different optical structure design. The first light adjusting portion 132A and the second light adjusting portion 132B have inclined surfaces. The first light adjusting portion 132A has a wave-shaped structure. The second light adjusting portion 132B also has a wave-shaped structure.

[0044] The corrugated portion 133 has a corrugated structure and is arc-shaped. In this embodiment, the corrugated portion 133 is installed on the outer wall of the inner pipe 13. The corrugated structure of this embodiment includes only a plurality of protrusions P1 and does not include flat portions P2 (the corrugated structure of this embodiment is shown in FIG. 7 but not in FIG. 6). In another embodiment, the corrugated portion 133 may be installed on the inner wall of the inner pipe 13.

[0045] As can be seen from the above, the first light-adjusting portion 132A and the second light-adjusting portion 132B have inclined surfaces, which can effectively concentrate the light beams emitted from the light source substrate 14 toward the corrugated portion 133, thereby improving the luminous efficiency of the lamp tube 1. At the same time, the first light-adjusting portion 132A and the second light-adjusting portion 132B can effectively elongate the light spot generated by the light beams from the light source substrate 14, thereby significantly reducing the scattering phenomenon. Similarly, the corrugated structure of the corrugated portion 133 can significantly reduce the scattering phenomenon, thereby reducing the loss of the light beams passing through the corrugated portion 133. Therefore, the luminous efficiency of the lamp tube 1 can be further improved to meet the requirements of practical applications.

[0046] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lamp tube having the multi-layer optical medium structure of this embodiment should still fall within the protection scope of the present invention.

[0047] FIG. 7 is an explanatory diagram of the operation of a lamp tube having a multilayer optical medium structure according to a third embodiment of the present invention. As shown in FIG. 7, in this embodiment, the corrugated structure of the corrugated portion 133 of the inner tube 13 only has protrusions P1. When light passes through the corrugated portion 133 of the inner tube 13, it is refracted by the corrugated portion 133 and the diffusing agent DA therein. At the same time, the corrugated portion 133 significantly reduces scattering, thereby reducing the loss of light passing through the corrugated portion 133. Then, when the light passes through the outer tube 12, the outer tube 12 refracts the light emitted from the light source substrate 14 and focuses it back toward the corrugated portion 133. The path of the light is indicated by the arrow AR2 in the figure.

[0048] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lamp tube having the multi-layer optical medium structure of this embodiment should still fall within the protection scope of the present invention.

[0049] Please refer to Figures 8 and 9. Figure 8 is a cross-sectional view of a lamp tube having a multilayer optical medium structure according to a fourth embodiment of the present invention. Figure 9 is an explanatory diagram of a first prism step of a first light adjusting part of a lamp tube having a multilayer optical medium structure according to the fourth embodiment of the present invention. Please also refer to Figures 1 and 5. As shown in the figures, the lamp tube 1 includes two lamp holders 11, an outer tube 12, an inner tube 13, and a light source substrate 14.

[0050] The outer tube 12 is cylindrical. The inner tube 13 is installed inside the outer tube 12. The inner tube 13 includes a mounting seat 131, a first light adjusting portion 132A, a second light adjusting portion 132B, and a corrugated portion 133. The mounting seat 131, the first light adjusting portion 132A, and the second light adjusting portion 132B are installed on the inner wall of the inner tube 13. The corrugated portion 133 is installed between the first light adjusting portion 132A and the second light adjusting portion 132B. The mounting seat 131 is installed between the first light adjusting portion 132A and the second light adjusting portion 132B and faces the corrugated portion 133. In this way, the corrugated portion 133 corresponds to one side of the light source substrate 14 (the corrugated portion 133 faces the light exit surface LS of the light source substrate 14).

[0051] The light source board 14 is installed on the mounting seat 131 of the inner tube 13 and includes a circuit board 141 and a plurality of light emitting diodes 142 .

[0052] The two lamp holders 11 are respectively installed at both ends of the outer tube 12. One of the lamp holders 11 may be installed with a power supply module (not shown), which is connected to the light source board 14 to drive the light source board 14.

[0053] The above components are similar to those in the previous embodiment and will not be described in detail here. Unlike the previous embodiment, the inner tube 13 of this embodiment has a different optical structure design. The first light adjusting portion 132A and the second light adjusting portion 132B have inclined surfaces. The first light adjusting portion 132A has a plurality of first prism steps S1' arranged in sequence. The second light adjusting portion 132B has a plurality of second prism steps S2' arranged in sequence. Each first prism step S1' has a first upper surface c1' and a first lower surface b1' connected to each other, and the distance between the first upper surface c1' and the light source substrate 14 is smaller than the distance between the first lower surface b1' and the light source substrate 14. Similarly, each second prism step S2' has a second upper surface and a second lower surface connected to each other, and the distance between the second upper surface and the light source substrate 14 is smaller than the distance between the second lower surface and the light source substrate 14. The angle of the first prism step S1' with respect to the central axis X1 of the light source substrate 14 is 90° (θ2=90°). Because the structure of the first prism step S1' is the same as the structure of the second prism step S2', this article will only describe the structure of the first prism step S1'.

[0054] The corrugated portion 133 has a corrugated structure and is arc-shaped. In this embodiment, the corrugated portion 133 is installed on the inner wall of the inner pipe 13. The corrugated structure of this embodiment only includes a plurality of protrusions P1 and does not include flat portions P2 (the corrugated structure of this embodiment is not shown in FIG. 8. The corrugated structure of this embodiment is the same as that of FIG. 5). In another embodiment, the corrugated portion 133 may also be installed on the outer wall of the inner pipe 13.

[0055] As can be seen from the above, the first light adjusting portion 132A and the second light adjusting portion 132B of the inner tube 13 of the lamp tube 1 have inclined surfaces, and the corrugated portion 133 has an arc shape. Furthermore, the first upper surface c1' of each first prism step S1' is parallel to the vertical reference plane VR, and the first lower surface b1' of each first prism step S1' is parallel to the horizontal reference plane HR. The second upper surface of each second prism step S2' is parallel to the vertical reference plane VR, and the second lower surface of each second prism step S2' is parallel to the horizontal reference plane HR. Thus, the first light adjusting portion 132A and the second light adjusting portion 132B may be stepped. This structural design can improve the light-collecting function, further increase the illuminance in a specific direction (the direction of the corrugated portion 133), and further improve the lighting effect of the lamp tube 1.

[0056] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lamp tube having the multi-layer optical medium structure of this embodiment should still fall within the protection scope of the present invention.

[0057] Although the steps of the methods described herein are shown and described in a particular order, the order of operations of each method may be changed, some steps may be performed in reverse order or simultaneously with other steps, and in other embodiments, different steps may be performed intermittently and / or alternately.

[0058] In summary, according to an embodiment of the present invention, a lamp tube includes an outer tube, an inner tube, and a light source substrate. The inner tube is installed inside the outer tube and includes a mounting base, a first light adjusting portion, a second light adjusting portion, and a corrugated portion. The mounting base, a first dimming unit, and a second dimming unit are installed on the inner wall of the inner tube. The corrugated portion and the mounting base are installed between the first light adjusting portion and the second light adjusting portion. The light source substrate is installed on the mounting base, and the corrugated portion corresponds to one side of the light source substrate. The first light adjusting portion has a plurality of first prism steps arranged in sequence, the second light adjusting portion has a plurality of second prism steps arranged in sequence, and the corrugated portion has a corrugated structure. As can be seen from the above, the lamp tube includes an outer tube and a recessed inner tube, forming a multi-layer optical medium structure (a double-layer globe). This multi-layer optical medium structure allows the light emitted from the light source substrate to be refracted twice, generating a focusing function, effectively increasing the illuminance in a specific direction (the direction of the corrugated portion) and significantly improving the lighting effect of the lamp tube. The above wave structure can also diffuse the light evenly and make the light more uniform.

[0059] According to an embodiment of the present invention, the first and second light adjusting sections of the inner tube of the lamp tube have a special structural design. The first light adjusting section has a plurality of sequentially arranged first prism steps, and the second light adjusting section has a plurality of sequentially arranged second prism steps. Each first prism step has a first upper surface and a first lower surface connected to each other. The distance between the first upper surface and the light source substrate is smaller than the distance between the first lower surface and the light source substrate. Each second prism step has a second upper surface and a second lower surface connected to each other. The distance between the second upper surface and the light source substrate is smaller than the distance between the second lower surface and the light source substrate. The structural design of the first and second light adjusting sections effectively concentrates the light emitted from the light source substrate in the direction of the corrugated section, improving the luminous efficiency of the lamp tube. This significantly improves the lamp's performance.

[0060] In addition, according to an embodiment of the present invention, the first and second light-adjusting parts of the inner tube of the lamp tube have a special structural design, which makes the first and second light-adjusting parts sawtooth, effectively elongating the light spot generated by the light beam from the light source board, and preventing users from experiencing glare or other discomfort caused by the light spot, thereby greatly improving the visual effect of the light beam from the lamp tube, effectively improving environmental comfort, widening the application range of the lamp tube, and making it more flexible in use.

[0061] Furthermore, according to an embodiment of the present invention, the corrugated portion of the inner tube of the lamp tube has a corrugated structure, which includes a plurality of protrusions and a plurality of flat portions. The protrusions and the flat portions are alternately arranged. The upper end of each protrusion is arc-shaped. As can be seen from the above, the corrugated structure of the corrugated portion has the alternating protrusions and flat portions, which can greatly reduce the scattering phenomenon and reduce the loss of light passing through the corrugated portion. Therefore, the light efficiency of the lamp tube is further improved, which can meet the requirements of practical applications.

[0062] According to an embodiment of the present invention, the first and second light adjusting portions of the inner tube of the lamp tube are inclined surfaces, and the corrugated portion is arc-shaped. The first upper surface of each first prism step is parallel to the vertical reference plane, and the first lower surface of each first prism step is parallel to the horizontal reference plane. The second upper surface of each second prism step is parallel to the vertical reference plane, and the second lower surface of each second prism step is parallel to the horizontal reference plane. In this way, the first and second light adjusting portions can be stepped. This structural design can improve the light-gathering function, thereby further increasing the illuminance in a specific direction (the direction of the corrugated portion) and further improving the lighting effect of the lamp tube.

[0063] Furthermore, according to the embodiment of the present invention, the lamp tube can achieve the above-mentioned multi-layer optical medium structure through a simple structural design, and the multi-layer optical medium structure can effectively improve the light efficiency, lighting effect and visual effect of the lamp tube. In this way, the lamp tube can achieve the desired effect without significantly increasing the cost, improve the practicality of the lamp tube, better meet the needs of different applications, and adapt to future development trends.

[0064] Although the above embodiments are described in this specification, it should be noted that they do not limit the scope of the claims of the present invention. Therefore, any changes and modifications to the embodiments described in this specification based on the innovative concept of the present invention, or the replacement of equivalent structures or equivalent processes made using the contents of the specification and drawings of the present invention, or the direct or indirect application of the above technical solutions to other related technical fields, are all within the scope of the claims of the present invention. [Explanation of symbols]

[0065] 1 lamp tube 11 Lamp holder 12 Outer tube 13 Inner tube 131 Mounting seat 132A 1st light adjustment section 132B 2nd light adjustment section 133 Waveform section P1 protrusion P2 flat part 14 Light source board 141 Circuit Board 142 Light-emitting diode LS Light source board light exit surface S1 First prism step S1' First prism step S2 Second prism step S2' Second prism step a1 bottom b1 1st bottom surface b1' 1st bottom surface c1 1st top surface c1' 1st top surface θ1 angle θ2 angle DA Diffuser X1 Center axis of light source board VR vertical reference plane HR horizontal reference plane AR1 Arrow AR2 Arrow

Claims

1. an outer tube, an inner tube, and a light source substrate; the inner tube is installed in the outer tube and includes a mounting seat, a first light adjusting portion, a second light adjusting portion, and a corrugated portion, the mounting seat, the first light adjusting portion, and the second light adjusting portion are installed on an inner wall of the inner tube, and the corrugated portion and the mounting seat are installed between the first light adjusting portion and the second light adjusting portion; The light source substrate is installed on the mounting seat, and the corrugated portion corresponds to one side of the light source substrate; A lamp tube having a multilayer optical medium structure, characterized in that the first light adjusting portion has a plurality of first prism steps arranged in sequence, the second light adjusting portion has a plurality of second prism steps arranged in sequence, and the corrugated portion has a corrugated structure.

2. 2. The lamp tube having a multi-layer optical medium structure as claimed in claim 1, wherein said outer tube is cylindrical.

3. 2. The lamp tube with a multi-layer optical medium structure as claimed in claim 1, wherein the corrugated portion is disposed on the inner wall or the outer wall of the inner tube.

4. 2. The lamp tube with a multi-layer optical medium structure as claimed in claim 1, wherein the corrugated portions are disposed on the inner and outer walls of the inner tube.

5. 2. The lamp tube with multi-layer optical medium structure as claimed in claim 1, wherein the wave-shaped structure comprises a plurality of protrusions, each of which has an upper end in the shape of a circular arc.

6. 6. The lamp tube with a multi-layer optical medium structure as claimed in claim 5, wherein the corrugated structure comprises a plurality of flat portions, and the plurality of protrusions and the plurality of flat portions are alternately arranged.

7. 2. A lamp tube with a multilayer optical medium structure according to claim 1, wherein each of the first prism steps has a first upper surface and a first lower surface connected to each other, and the distance between the first upper surface and the light source substrate is smaller than the distance between the first lower surface and the light source substrate; and each of the second prism steps has a second upper surface and a second lower surface connected to each other, and the distance between the second upper surface and the light source substrate is smaller than the distance between the second lower surface and the light source substrate.

8. 8. A lamp tube having a multilayer optical medium structure as described in claim 7, wherein the first upper surface is parallel to a vertical reference plane, the first lower surface is parallel to a horizontal reference plane, the second upper surface is parallel to the vertical reference plane, and the second lower surface is parallel to the horizontal reference plane.

9. 8. A lamp tube having a multilayer optical medium structure as described in claim 7, wherein the first upper surface is not parallel to a vertical reference plane, the first lower surface is not parallel to a horizontal reference plane, the second upper surface is not parallel to the vertical reference plane, and the second lower surface is not parallel to the horizontal reference plane.

10. 2. The lamp tube having a multi-layer optical medium structure as claimed in claim 1, wherein the first light-adjusting portion and the second light-adjusting portion are inclined surfaces, and the corrugated portion is arc-shaped.

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