LED light source lamp
By using a light-transmitting lamp panel with multiple layers of light-transmitting and refractive layers in LED lamps, the problems of high light loss and low light output of traditional LED surface light source lamps are solved, achieving a lighting effect with high light transmittance and high light output intensity.
Patent Information
- Application Number
- CN202511897136.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-03-03
AI Technical Summary
Traditional LED surface light source lamps suffer from high light loss rate, low light output rate and high energy consumption, requiring the configuration of higher power LED light sources to meet lighting needs.
The light-transmitting panel is composed of N layers of light-transmitting and refractive layers. Each layer contains multiple refractive and light-transmitting elements. After passing through multiple layers of refractive layers, light forms a three-dimensional and blurred optical effect with a transmittance between 70% and 96%, thereby improving the light intensity.
It improves optical performance and light intensity, reduces light loss, decreases the power requirement for LED light sources, and enhances lighting efficiency.
Smart Images
Figure CN121594340A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an LED lamp, and more particularly to an LED light source lamp comprising a plurality of LED light sources and a light-transmitting panel, wherein the light-transmitting panel comprises N layers of light-transmitting and refractive layers, and each of the light-transmitting and refractive layers comprises a plurality of light-reflecting elements. Background Technology
[0002] As we all know, various LED lights are now widely used, and LED lights have many advantages such as energy saving, environmental protection, and long lifespan.
[0003] LED surface light sources are particularly widely used in LED lighting fixtures.
[0004] In terms of structure, LED surface light source lamps mainly include LED light source 1 and light diffuser 2. When working, the LED light source 1 is powered on and emits light. The light X emitted by the LED light source 1 shines through the light diffuser 2 to provide lighting for the user.
[0005] The main function of the light-diffusing plate 2 in a traditional LED surface light source is to achieve the effect of light diffusing, thereby converting the point light source into a surface light source.
[0006] To improve the light homogenization effect of the light homogenizing plate 2, light homogenizing particles K are usually added to the light homogenizing plate 2. The light homogenizing particles K can reflect and refract the light X, thereby improving the diffuse reflection effect of the light X in the light homogenizing plate 2, thus improving the light homogenizing effect of the light homogenizing plate 2.
[0007] The homogenizing particle K can be selected from phosphors or other particles.
[0008] like Figures 1 to 2 As shown, this is the design structure of a traditional LED surface light source lamp, where, as Figure 1 The design shown is a direct-light-down design, with the LED light source 1 positioned above the diffuser plate 2.
[0009] like Figure 2 The design shown is a side-entry light source, with the LED light source 1 located at the end of the light distribution plate 2.
[0010] Traditional LED surface light sources still have many shortcomings in practical use, which are described below.
[0011] First, traditional LED surface light source lamps have a high light loss rate.
[0012] Because traditional LED surface light sources achieve diffuse reflection and uniform light by using the diffuser plate 2, their overall optical path design inevitably leads to a high light loss rate.
[0013] Secondly, traditional LED surface light source lamps have a low light output rate.
[0014] Since the light-diffusing plate 2 achieves the effect of light uniformity through diffuse reflection, the light intensity of the light passing through the light-diffusing plate 2 is greatly lost, which inevitably leads to the problem of low light output of the lamp.
[0015] Secondly, traditional LED surface light sources generally require high-power LED light sources, resulting in high energy consumption.
[0016] To meet users' requirements for lighting intensity and to compensate for the light loss caused by the diffuser plate 2, traditional LED surface light sources generally require a high-power LED light source to meet users' actual needs. As mentioned above, this is the main drawback of the prior art. Summary of the Invention
[0017] The technical solution adopted in this invention is as follows: an LED light source lamp, including a plurality of LED light sources (10) and a light-transmitting lamp plate (20), wherein the light-transmitting lamp plate (20) has a light-incident surface (21) and a light-exiting surface (22), the plurality of LED light sources (10) correspond to the light-incident surface (21), the light rays (L) emitted by the plurality of LED light sources 10 enter the light-transmitting lamp plate (20) from the light-incident surface (21), and then the light rays (L) exit from the light-exiting surface (22).
[0018] The light transmittance T of the light-transmitting lamp panel (20) is between 70% and 96%. The light-transmitting lamp panel (20) includes N layers of light-transmitting refractive layers (23). The N layers of light-transmitting refractive layers (23) are stacked together to form the light-transmitting lamp panel (20), where N≧2. Each layer of light-transmitting refractive layer (23) includes several refractive light-transmitting bodies (30). After the light rays (L) emitted by several LED light sources (10) enter from the light-incident surface (21), the light rays (L) pass through several refractive light-transmitting bodies (30) of each layer of light-transmitting refractive layer (23) in sequence. Finally, the light rays (L) exit from the light-out surface (22). When the light rays (L) pass through the refractive light-transmitting bodies (30) of each layer of light-transmitting refractive layer (23), the refractive light-transmitting bodies (30) refract the light rays (L) to change the straight light path of the light rays (L).
[0019] The beneficial effects of the present invention are as follows: After the light emitted by the plurality of LED light sources of the present invention enters from the light-incident surface, the light sequentially penetrates the plurality of refracting light-transmitting bodies in each layer of the light-transmitting and refractive layer, and finally, the light exits from the light-exiting surface. When the light penetrates the refracting light-transmitting bodies in each layer of the light-transmitting and refractive layer, the refracting light-transmitting bodies refract the light to change the straight light path of the light. The light emitted after penetrating N layers of the light-transmitting and refractive layer will form a three-dimensional and blurred optical effect on the human eye on the side of the light-exiting surface, thereby improving the optical effect of the LED light source. In addition, since the light transmittance T of the light-transmitting light panel is between 70% and 96%, the light intensity of the LED light source is high, enabling the LED light source to provide illumination light for the user. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the direct-light structure of a traditional LED surface light source.
[0021] Figure 2 This is a schematic diagram of the side-entry structure of a traditional LED surface light source lamp.
[0022] Figure 3 This is a three-dimensional structural diagram of the present invention.
[0023] Figure 4 This is a schematic diagram of the light path of the present invention, showing the refraction and transmission of light in the light-transmitting plate.
[0024] Figure 5 This is a three-dimensional exploded view of the present invention.
[0025] Figure 6 This is a three-dimensional schematic diagram of the refractive light-transmitting body of the present invention.
[0026] Figure 7 This is a schematic diagram of the top edge of the present invention being a top intersection line.
[0027] Figure 8 This is a schematic diagram of the top edge of the present invention being a top arc surface.
[0028] Figure 9 This is a schematic diagram showing the staggered angle between the top edges of the refracting bodies of the upper and lower light-transmitting layers of the present invention.
[0029] Figure 10 This is a schematic diagram of N layers of light-transmitting and refractive layers stacked together according to method one of the present invention.
[0030] Figure 11 This is a schematic diagram of N layers of light-transmitting and refractive layers stacked together in a second manner according to the present invention.
[0031] Figure 12 This is a schematic diagram of the lamp frame of the present invention.
[0032] Figure 13 This is a schematic diagram of the light source board assembly structure of the present invention.
[0033] Figure 14 This is a schematic diagram showing the location of the assembly port of the present invention.
[0034] Figure 15 This is an assembly diagram of the fixing screw of the present invention. Detailed Implementation
[0035] like Figures 3 to 15 As shown, especially as Figures 3 to 4 As shown, an LED light source includes several LED light sources (10) and a light-transmitting plate (20), wherein the light-transmitting plate (20) has a light-incident surface (21) and a light-emitting surface (22).
[0036] Several LED light sources (10) correspond to the light-incident surface (21). The light rays (L) emitted by the LED light sources 10 enter the light-transmitting plate (20) from the light-incident surface (21), and then the light rays (L) exit from the light-exit surface (22). The light transmittance T of the light-transmitting plate (20) is between 70% and 96%. In practice, the light transmittance T is preferably selected to be between 90% and 96%.
[0037] The transmittance of the light distribution plate of a traditional LED surface light source is generally less than 50%. The formula for calculating the transmittance T is T% = I / I0*100%, where I is the intensity of the transmitted light emitted by the light ray (L) from the light-emitting surface (22), and I0 is the intensity of the incident light emitted by the light ray (L) from the light-incident surface (21).
[0038] The light-transmitting lamp panel (20) includes N layers of light-transmitting and refractive layers (23), which are stacked together to form the light-transmitting lamp panel (20), where N≧2. Each layer of the light-transmitting and refractive layer (23) includes several light-reflecting bodies (30).
[0039] like Figure 4 As shown, after the light rays (L) emitted by several LED light sources 10 enter the light-incident surface (21), the light rays (L) pass through several refracting light-transmitting bodies (30) of each light-transmitting and refractive layer (23) in sequence, and finally, the light rays (L) exit from the light-exit surface (22).
[0040] When the light ray (L) passes through the refracting body (30) of each of the light-transmitting and refractive layers (23), the refracting body (30) refracts the light ray (L) to change the straight light path of the light ray (L).
[0041] The light (L) emitted through the N layers of the light-transmitting refractive layer (23) will create a pixelated, three-dimensional, and blurred optical effect on the human eye (E) on the side of the light-emitting surface (22), thereby enhancing the optical effect of the LED light source. In addition, since the light transmittance T of the light-transmitting plate (20) is between 70% and 96%, the light intensity of the LED light source is high, enabling the LED light source to provide illumination for the user.
[0042] like Figure 3 As shown, in a specific implementation, several LED light sources (10) are set on a light source board (11), which is connected to a light source controller (12), and the light source controller (12) controls the working status of several LED light sources (10).
[0043] The operating states of the LED light source (10) include the emitting and non-emitting states of the LED light source (10), the control of the color of the light emitted by the LED light source (10), and the control of other operating states.
[0044] like Figures 5 to 6 As shown, in specific implementation, each of the refracting light-transmitting bodies (30) has a bottom surface (31), a first sidewall (32) and a second sidewall (33), wherein the first sidewall (32) and the second sidewall (33) are inclinedly connected to both sides of the bottom surface (31), and the top of the first sidewall (32) and the second sidewall (33) meet to form a top edge (34).
[0045] like Figure 7 As shown, in practical implementation, the top edge (34) is a top intersection line (341), such as Figure 8 As shown, the top edge (34) can also be a top arc surface (342).
[0046] like Figure 7 As shown, in a specific implementation, the top of the first sidewall (32) and the second sidewall (33) intersect to form an inclined angle (A), which is less than 180°.
[0047] like Figure 9 As shown, in specific implementation, the multiple refracting light-transmitting bodies (30) of each light-transmitting and refractive layer (23) are parallel to each other, and the staggered angle (B) between the top edges (34) of the refracting light-transmitting bodies (30) of any two adjacent light-transmitting and refractive layers (23) is ≦90°.
[0048] In practice, the relative positions of any two adjacent light-transmitting and refractive layers (23) can be changed to change the angle of the staggered angle (B), thereby presenting different three-dimensional pixel shapes.
[0049] like Figures 10 to 11 As shown, in a specific implementation, the light-transmitting refractive layer (23) also includes a light-transmitting substrate (40), and several light-transmitting refractors (30) protrude from the top surface (41) of the light-transmitting substrate (40).
[0050] When stacking N layers of the light-transmitting and refractive layer (23) together, the following two methods can be used for stacking.
[0051] like Figure 10 As shown, in Method 1, the bottom surface (42) of the substrate of the light-transmitting substrate (40) of the upper light-transmitting refractive layer (23) is pressed on the top edge (34) of several light-reflecting bodies (30) of the lower light-transmitting refractive layer (23). The several light-reflecting bodies (30) of the two light-transmitting refractive layers (23) are staggered, and the staggered angle (B) is formed between the top edges (34) of the light-reflecting bodies (30) of the two light-transmitting refractive layers (23).
[0052] like Figure 11 As shown, in Method 2, the bottom surface (42) of the substrate of the light-transmitting substrate (40) of the upper light-transmitting refractive layer (23) is pressed on the bottom surface (42) of the substrate of the light-transmitting substrate (40) of the lower light-transmitting refractive layer (23). Several light-reflecting bodies (30) of the two light-transmitting refractive layers (23) are staggered, and the staggered angle (B) is formed between the top edges (34) of the light-reflecting bodies (30) of the two light-transmitting refractive layers (23).
[0053] In Method 2, the upper and lower light-transmitting refractive layers (23) and the light-transmitting substrate (40) are processed into a whole.
[0054] like Figure 10 As shown, in a specific implementation, the thickness (H1) of the light-transmitting substrate (40) is between 0.2 mm and 4 mm.
[0055] like Figure 7 As shown, in a specific implementation, the vertical distance (H2) between the top edge (34) of the refracting light-transmitting body (30) and the bottom surface (31) of the refracting light-transmitting body (30) is between 0.005 mm and 0.05 mm.
[0056] By limiting the thickness of the light-transmitting substrate (40) and the height of the refracting light-transmitting body (30), the light transmittance of the light-transmitting lamp plate (20) and the light-transmitting refractive layer (23) can be guaranteed. In addition, the height of the refracting light-transmitting body (30) should not be too large, otherwise it will affect the imaging effect at the human eye (E) position.
[0057] In practice, the refractive light-transmitting body (30) and the light-transmitting substrate (40) are made of the same material. For example, both are made of acrylic PMMA material, with an overall light transmittance of about 93%; both are made of PC material, with an overall light transmittance of about 88%; both are made of MS material, with an overall light transmittance of about 90%; and both are made of PS material, with an overall light transmittance of about 88% to 90%.
[0058] In addition, the refracting light-transmitting body (30) of the present invention adopts the structure of the prism described above, and the light ray (L) enters from its inclined surface, which can increase the amount of light emitted.
[0059] like Figures 12 to 15 As shown, in a specific implementation, the LED light source also includes a lamp frame (100), on which a light source board assembly structure (200) and a light-transmitting plate assembly groove (300) are provided on the inner side wall (110) of the lamp frame (100). The light source board (11) is assembled in the light source board assembly structure (200), and the light-transmitting lamp board (20) is assembled in the light-transmitting plate assembly groove (300).
[0060] The light source board assembly structure (200) includes an upper top rib (210) and a lower pressure rib (220). The upper top rib (210) has a top end face (211), and the lower pressure rib (220) has a side end face (221).
[0061] like Figure 14 As shown, an assembly opening (230) is formed between the top end face (211) and the side end face (221). The four edges of the light source plate (11) are inserted into the assembly opening (230). The upper top rib (210) presses against the bottom of the light source plate (11), and the lower pressing rib (220) presses against the top of the light source plate (11).
[0062] The present invention enables the light source plate (11) to be easily fixed in the light source plate assembly structure (200) through the structural design of the upper top rib (210) and the lower pressing rib (220). In addition, the upper top rib (210) exerts an upward force on the light source plate (11) to maintain the flat physical shape of the light source plate (11), so that the distance between each LED light source (10) and the light-transmitting lamp plate (20) is equal, thereby improving the optical effect of the overall product.
[0063] like Figures 12 to 15 As shown, in specific implementation, the light source board (11) is screwed with several fixing screws (240) around its perimeter, and each fixing screw (240) is inserted into the assembly port (230).
[0064] The fixing screw (240) includes a screw (241) and a nut (242). The nut (242) is connected to the top of the screw (241) and is pressed against the top of the light source plate (11). The bottom of the screw (241) is pressed into the upper top rib (210).
[0065] During the assembly of the fixing screw (240), as the fixing screw (240) is gradually screwed into the light source plate (11), the screw (241) gradually presses against the upper top rib (210), so that the fixing screw (240) gradually applies a lifting force to the light source plate (11), thereby achieving the purpose of gradually fixing the light source plate (11) in the light source plate assembly structure (200).
[0066] In practice, the upper top rib (210) is located below the lower pressure rib (220).
[0067] In specific implementation, the top rib (210) includes a longitudinal rib (212) and a transverse rib (213), wherein the longitudinal rib (212) is connected to the end of the transverse rib (213), and the top end face (211) is located at the top of the longitudinal rib (212).
[0068] In practice, the lamp frame (100) is provided with an assembly structure (400) around its perimeter. The assembly structure (400) can fix the lamp frame (100) to the top of the roof, for example, by assembling it with the ceiling.
[0069] In practice, the LED light source (10) includes an LED light-emitting chip and a lens, with the LED light-emitting chip encased in the lens.
[0070] like Figures 3 to 11 As shown, in specific implementation, there are multiple ways to achieve the function of the present invention. A preferred implementation is described below.
[0071] An LED light source includes several LED light sources (10) and a light-transmitting plate (20). The light-transmitting plate (20) has a light-incident surface (21) and a light-exiting surface (22). The several LED light sources (10) correspond to the light-incident surface (21). The light rays (L) emitted by the several LED light sources (10) enter the light-transmitting plate (20) from the light-incident surface (21) and then exit from the light-exiting surface (22). The light transmittance T of the light-transmitting plate (20) is between 70% and 96%. In practice, the light transmittance T is preferably selected to be between 90% and 96%.
[0072] The light-transmitting panel (20) includes two light-transmitting and refractive layers (23), each of which includes several light-reflecting elements (30).
[0073] Each of the refracting light-transmitting bodies (30) has a bottom surface (31), a first sidewall (32) and a second sidewall (33), wherein the first sidewall (32) and the second sidewall (33) are obliquely connected to both sides of the bottom surface (31), and the top of the first sidewall (32) and the second sidewall (33) intersect to form a top intersection line (341).
[0074] The top of the first sidewall (32) and the second sidewall (33) meet to form an inclined angle (A) < 100°.
[0075] The several refracting light-transmitting bodies (30) of each light-transmitting refractive layer (23) are parallel to each other, and the staggered angle (B) between the top intersection lines (341) of the refracting light-transmitting bodies (30) of the two light-transmitting refractive layers (23) is ≦90°.
[0076] The light-transmitting refractive layer (23) also includes a light-transmitting substrate (40), and several light-reflecting bodies (30) protrude from the top surface (41) of the light-transmitting substrate (40). The bottom surface (42) of the light-transmitting substrate (40) of the upper light-transmitting refractive layer (23) is pressed above the top intersection line (341) of the several light-reflecting bodies (30) of the lower light-transmitting refractive layer (23).
[0077] The thickness (H1) of the light-transmitting substrate (40) is between 0.2 mm and 4 mm. The vertical distance (H2) between the top edge (34) of the refracting light-transmitting body (30) and the bottom surface (31) of the refracting light-transmitting body (30) is between 0.005 mm and 0.05 mm.
Claims
1. An LED light source lamp, comprising a plurality of LED light sources (10) and a light-transmitting panel (20), wherein, The light-transmitting lamp plate (20) has a light-incident surface (21) and a light-exiting surface (22). Several LED light sources (10) correspond to the light-incident surface (21). The light rays (L) emitted by the several LED light sources 10 enter the light-transmitting lamp plate (20) from the light-incident surface (21), and then the light rays (L) exit from the light-exiting surface (22). The lamp plate is characterized by: The light transmittance T of the light-transmitting lamp panel (20) is between 70% and 96%. The light-transmitting lamp panel (20) includes N layers of light-transmitting refractive layers (23). The N layers of light-transmitting refractive layers (23) are stacked together to form the light-transmitting lamp panel (20), where N≧2. Each layer of light-transmitting refractive layer (23) includes several refractive light-transmitting bodies (30). After the light rays (L) emitted by several LED light sources (10) enter from the light-incident surface (21), the light rays (L) pass through several refractive light-transmitting bodies (30) of each layer of light-transmitting refractive layer (23) in sequence. Finally, the light rays (L) exit from the light-out surface (22). When the light rays (L) pass through the refractive light-transmitting bodies (30) of each layer of light-transmitting refractive layer (23), the refractive light-transmitting bodies (30) refract the light rays (L) to change the straight light path of the light rays (L).
2. The LED light source lamp as described in claim 1, characterized in that: Each of the refracting light-transmitting bodies (30) has a bottom surface (31), a first sidewall (32) and a second sidewall (33), wherein the first sidewall (32) and the second sidewall (33) are obliquely connected to both sides of the bottom surface (31), and the top of the first sidewall (32) and the second sidewall (33) meet to form a top edge (34).
3. The LED light source lamp as described in claim 2, characterized in that: The top edge (34) is either a top intersection line (341) or a top arc surface (342).
4. An LED light source lamp as described in claim 2, characterized in that: The first sidewall (32) and the top of the second sidewall (33) meet to form an inclined angle (A), the inclined angle (A) < 180°, the several refracting light-transmitting bodies (30) of each light-transmitting and refractive layer (23) are parallel to each other, and the staggered angle (B) between the top edges (34) of the refracting light-transmitting bodies (30) of any two adjacent light-transmitting and refractive layers (23) is ≦ 90°.
5. An LED light source lamp as described in claim 1, characterized in that: The light-transmitting and refractive layer (23) also includes a light-transmitting substrate (40), and several light-transmitting and refractive bodies (30) protrude from the top surface (41) of the light-transmitting substrate (40).
6. An LED light source lamp as described in claim 5, characterized in that: When the N layers of the light-transmitting and refractive layer (23) are stacked together, the bottom surface (42) of the light-transmitting substrate (40) of the upper light-transmitting and refractive layer (23) is pressed on the top edge (34) of several light-reflecting bodies (30) of the lower light-transmitting and refractive layer (23). The several light-reflecting bodies (30) of the two light-transmitting and refractive layers (23) are staggered, and the staggered angle (B) is formed between the top edges (34) of the light-reflecting bodies (30) of the two light-transmitting and refractive layers (23).
7. An LED light source lamp as described in claim 5, characterized in that: When the N layers of the light-transmitting and refractive layer (23) are stacked together, the bottom surface (42) of the light-transmitting substrate (40) of the upper light-transmitting and refractive layer (23) is pressed on the bottom surface (42) of the light-transmitting substrate (40) of the lower light-transmitting and refractive layer (23). Several light-reflecting bodies (30) of the two light-transmitting and refractive layers (23) are staggered, and the staggered angle (B) is formed between the top edges (34) of the light-reflecting bodies (30) of the two light-transmitting and refractive layers (23).
8. An LED light source lamp as described in claim 5, characterized in that: The thickness (H1) of the light-transmitting substrate (40) is between 0.2 mm and 4 mm, and the vertical distance (H2) between the top edge (34) of the refracting light-transmitting body (30) and the bottom surface (31) of the refracting light-transmitting body (30) is between 0.005 mm and 0.05 mm.
9. An LED light source lamp as described in claim 3, characterized in that: Several LED light sources (10) are mounted on a light source plate (11). The LED light source also includes a lamp frame (100). The inner sidewall (110) of the lamp frame (100) is provided with a light source plate assembly structure (200) and a light-transmitting plate assembly groove (300). The light source plate (11) is mounted in the light source plate assembly structure (200), and the light-transmitting plate (20) is mounted in the light-transmitting plate assembly groove (300). The light source board assembly structure (200) includes an upper top rib (210) and a lower pressure rib (22). 0), the upper top rib (210) has a top end face (211), the lower pressing rib (220) has a side end face (221), and a mounting opening (230) is formed between the top end face (211) and the side end face (221). The four edges of the light source plate (11) are inserted into the mounting opening (230). The upper top rib (210) presses against the bottom of the light source plate (11), and the lower pressing rib (220) presses against the top of the light source plate (11). The light source board (11) is screwed with several fixing screws (240) around its perimeter. Each fixing screw (240) is inserted into the assembly port (230). Each fixing screw (240) includes a screw rod (241) and a nut (242). The nut (242) is connected to the top of the screw rod (241) and is pressed against the top of the light source board (11). The bottom of the screw rod (241) is pressed against the upper top rib (210), which is located below the lower pressing rib (220). The top rib (210) includes a longitudinal rib (212) and a transverse rib (213), wherein the longitudinal rib (212) is connected to the end of the transverse rib (213), the top end face (211) is located on the top of the longitudinal rib (212), and the lamp frame (100) is provided with an assembly structure (400) around its perimeter.
10. An LED light source lamp, comprising a plurality of LED light sources (10) and a light-transmitting panel (20), wherein, The light-transmitting lamp plate (20) has a light-incident surface (21) and a light-exiting surface (22). Several LED light sources (10) correspond to the light-incident surface (21). The light rays (L) emitted by the several LED light sources 10 enter the light-transmitting lamp plate (20) from the light-incident surface (21), and then the light rays (L) exit from the light-exiting surface (22). The lamp plate is characterized by: The light transmittance T of the light-transmitting panel (20) is between 70% and 96%. The light-transmitting panel (20) includes two light-transmitting and refractive layers (23). Each light-transmitting and refractive layer (23) includes several light-reflecting bodies (30). Each light-reflecting body (30) has a bottom surface (31), a first sidewall (32), and a second sidewall (33). The first sidewall (32) and the second sidewall (33) are obliquely connected to both sides of the bottom surface (31). The top of the first sidewall (32) and the second sidewall (33) intersect to form a top intersection line (341). The first sidewall (32) and the second sidewall (33) intersect at the top to form an inclined angle (A), which is less than 100°. Several refracting elements (30) of each light-transmitting and refractive layer (23) are parallel to each other, and the staggered angle (B) between the top intersection lines (341) of the refracting elements (30) of the two light-transmitting and refractive layers (23) is less than or equal to 90°. The light-transmitting refractive layer (23) also includes a light-transmitting substrate (40), and several light-reflecting bodies (30) protrude from the top surface (41) of the light-transmitting substrate (40). The bottom surface (42) of the light-transmitting substrate (40) of the upper light-transmitting refractive layer (23) is pressed above the top intersection line (341) of the several light-reflecting bodies (30) of the lower light-transmitting refractive layer (23). The thickness (H1) of the light-transmitting substrate (40) is between 0.2 mm and 4 mm, and the vertical distance (H2) between the top edge (34) of the refracting light-transmitting body (30) and the bottom surface (31) of the refracting light-transmitting body (30) is between 0.005 mm and 0.05 mm.