Neon light belt

Abstract

The utility model discloses a neon lamp strip relates to lighting and projection technical field. Neon lamp strip includes casing, circuit board, lamp pearl and grating layer, and the inside of casing is equipped with the accommodating cavity, and the cavity bottom of accommodating cavity is equipped with circuit board, and the one side of cavity bottom of circuit board is equipped with lamp pearl and is away from accommodating cavity, and the light emitting direction of lamp pearl is towards the light -emitting side of accommodating cavity, and grating layer is equipped with the light -emitting side of accommodating cavity and is parallel with the interval arrangement of circuit board. The utility model provides technical scheme to realize the holographic projection of neon lamp strip.

Description

Technical Field

[0001] This utility model relates to the field of lighting and projection technology, and in particular to a neon light strip. Background Technology

[0002] Neon lights, as a lighting device with strong visual impact and artistic expression, are widely used in advertising, architectural decoration, stage effects, and landscape lighting.

[0003] Traditional neon light strips mainly consist of a housing and embedded LED beads, which are connected to a power source via wires to achieve the function of emitting light.

[0004] However, traditional neon light strips typically only achieve two-dimensional projection, that is, the light emitted by the LEDs forms two-dimensional patterns or text on a flat surface. While this two-dimensional projection method satisfies basic lighting and decorative needs to some extent, its functionality appears rather limited in the context of the rapid development of modern display technology. Utility Model Content

[0005] The main purpose of this invention is to propose a neon light strip that aims to achieve holographic projection of the neon light strip.

[0006] To achieve the above objectives, the neon light strip proposed in this utility model includes:

[0007] The shell has an internal cavity;

[0008] A circuit board is disposed at the bottom of the receiving cavity;

[0009] An LED bead is disposed on the side of the circuit board opposite to the bottom of the receiving cavity, and the light emission direction of the LED bead is towards the light-emitting side of the receiving cavity; and

[0010] A grating layer is disposed on the light-emitting side of the receiving cavity and is arranged parallel to and spaced apart from the circuit board.

[0011] In one embodiment, the grating layer comprises a PET film and a periodic nanograting structure printed on the PET film;

[0012] Wherein, the grating period of the grating layer is set to gradually decrease or increase along the axial direction of the receiving cavity; and / or

[0013] The grating period of the grating layer is greater than or equal to 300 nm and less than or equal to 500 nm.

[0014] In one embodiment, the neon light strip further includes:

[0015] A liquid crystal phase modulator is disposed in the receiving cavity and located between the circuit board and the grating layer. The liquid crystal phase modulator is electrically connected to the circuit board. Under the action of voltage, the arrangement of liquid crystal molecules in the liquid crystal phase modulator changes, thereby changing the path of the light from the lamp beads to the grating layer.

[0016] In one embodiment, the housing includes:

[0017] The outer casing, having the receiving cavity inside; and

[0018] A support plate is disposed in the receiving cavity, the support plate being located between the liquid crystal phase modulator and the grating layer and being in contact with the grating layer.

[0019] In one embodiment, the neon light strip further includes:

[0020] A light pattern adjustment unit is disposed in the receiving cavity, and the light pattern adjustment unit is located between the support plate and the liquid crystal phase modulator to shape the light transmitted by the liquid crystal phase modulator.

[0021] In one embodiment, the housing is configured as silicone, and at least one of the grating layer, the circuit board, the liquid crystal phase modulator, and the light pattern adjustment part is co-extruded and integrally bonded with the housing.

[0022] In one embodiment, multiple LED beads are spaced apart on the circuit board, and all of the multiple LED beads are configured as tri-color LED beads.

[0023] In one embodiment, the LED bead is configured as a quantum dot LED, and the circuit board is provided with a plurality of PWM drive chips at intervals. The plurality of PWM drive chips work independently and are electrically connected to the plurality of quantum dot LEDs in a one-to-one correspondence to control the brightness of the quantum dot LEDs.

[0024] In one embodiment, the neon light strip further includes:

[0025] An FPGA chip is located on the side of the circuit board away from the grating layer and is electrically connected to the circuit board to control the color of the light emitted by the plurality of LED beads.

[0026] In one embodiment, the neon light strip further includes:

[0027] The graphene thermal conductive film is attached to the circuit board on one side and to the FPGA chip on the other side.

[0028] This invention provides a neon light strip incorporating a housing, circuit board, LED beads, and a grating layer. The housing has an internal cavity; the circuit board is located at the bottom of the cavity; the LED beads are positioned on the side of the circuit board facing away from the bottom of the cavity, with their light emission direction pointing towards the light-emitting side of the cavity; the grating layer is located on the light-emitting side of the cavity and is parallel to and spaced apart from the circuit board. Compared to existing neon light strips that only contain LED beads, this invention includes a grating layer. The light emitted by the LED beads faces the grating layer, and when the light emitted by the LED beads passes through the grating layer, it is split into multiple beams that diffuse in all directions. These diffused beams then meet again and interfere, projecting a three-dimensional image onto a wall or floor, thus achieving holographic projection of the neon light strip. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the structure of an embodiment of the neon light strip provided by this utility model;

[0031] Figure 2 for Figure 1 An exploded view of one embodiment;

[0032] Figure 3 for Figure 1 A cross-sectional view of one embodiment;

[0033] Figure 4 for Figure 3 An enlarged view of an embodiment at point A;

[0034] Figure 5 for Figure 1 A cross-sectional view of an embodiment from another perspective.

[0035] Explanation of icon numbers:

[0036] 100. Housing; 110. Outer shell; 111. Light-emitting side; 112. Side plate; 113. End plate; 120. Support plate; 130. Wire;

[0037] 210. Circuit board; 220. LED beads; 230. PWM driver chip; 240. FPGA chip; 250. Graphene thermal conductive film;

[0038] 300. Grating layer;

[0039] 400. Liquid crystal phase modulator; 410. Electrode leads;

[0040] 500. Light pattern adjustment section.

[0041] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0043] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0044] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0045] Neon lights, as a lighting device with strong visual impact and artistic expression, are widely used in advertising, architectural decoration, stage effects, and landscape lighting.

[0046] Traditional neon light strips mainly consist of a housing and embedded LED beads, which are connected to a power source via wires to achieve the function of emitting light.

[0047] However, traditional neon light strips typically only achieve two-dimensional projection, that is, the light emitted by the LEDs forms two-dimensional patterns or text on a flat surface. While this two-dimensional projection method satisfies basic lighting and decorative needs to some extent, its functionality appears rather limited in the context of the rapid development of modern display technology.

[0048] This invention proposes a neon light strip to achieve holographic projection of the neon light strip.

[0049] Please see Figures 1 to 3 In one embodiment, the neon light strip includes a housing 100, a circuit board 210, LED beads 220, and a grating layer 300. The housing 100 has an internal cavity; the circuit board 210 is disposed at the bottom of the cavity; the LED beads 220 are disposed on the side of the circuit board 210 away from the bottom of the cavity, and the light emission direction of the LED beads 220 is towards the light-emitting side 111 of the cavity; the grating layer 300 is disposed on the light-emitting side 111 of the cavity and is parallel and spaced apart from the circuit board 210.

[0050] The housing 100 has an internal cavity to provide installation space for the functional structure of the neon light strip, and the housing 100 can provide external protection for the neon light strip. In one embodiment, at least one cavity wall of the cavity is transparent, that is, one of the transparent cavity walls is the light-emitting side 111 of the cavity. In one embodiment, the light-emitting side 111 of the cavity is disposed opposite to the bottom of the cavity, and the functional structure of the neon light strip is disposed between the light-emitting side 111 of the cavity and the bottom of the cavity.

[0051] The circuit board 210 is used to connect to an external power source to provide power to the LED beads 220 and control their operating state. In one embodiment, a wire 130 is connected to the end of the housing 100. The circuit board 210 is connected to the wire 130 and is tightly fitted to the bottom of the cavity. The circuit board 210 and the light-emitting side 111 of the cavity are arranged parallel to each other at intervals. The LED beads 220 are located on the side of the circuit board 210 facing the light-emitting side 111 of the cavity, so that the light emission direction of the LED beads 220 is towards the light-emitting side 111 of the cavity. The light emitted by the LED beads 220 passes through the light-emitting side 111 of the cavity and diffuses into the external environment. In one embodiment, the LED beads 220 are LED light sources to ensure that they can provide sufficient brightness and good coherence, enabling the neon light strip to be projected onto the ground or wall at a distance of 0.5m to 2m in the external environment, ensuring high resolution and achieving clear projection at a short distance.

[0052] The grating layer 300 is used to diffract the light from the neon light strip, that is, the grating layer 300 is used to disperse the light emitted by the LED beads 220 into multiple light waves. In one embodiment, the grating layer 300 is attached to the side of the light-emitting side 111 facing the circuit board 210, so that the grating layer 300 and the light-emitting direction of the LED beads 220 are directly opposite each other. Since the grating layer 300 is a grating structure, when the light emitted by the LED beads 220 reaches the grating layer 300, the light will be split into multiple light waves by the grating structure and diffused in all directions; since the LED beads 220 have good coherence, when the multiple light waves meet again, the multiple light waves can interfere to form a three-dimensional projection.

[0053] The technical solution of this utility model involves setting a housing 100, a circuit board 210, LED beads 220, and a grating layer 300 within a neon light strip. The housing 100 has an internal cavity; the circuit board 210 is located at the bottom of the cavity; the LED beads 220 are located on the side of the circuit board 210 facing away from the bottom of the cavity, with the light emission direction of the LED beads 220 facing the light-emitting side 111 of the cavity; the grating layer 300 is located on the light-emitting side 111 of the cavity and is parallel and spaced apart from the circuit board 210. Compared to existing neon light strips that only have LED beads 220, this utility model's technical solution includes a grating layer 300. The light emission direction of the LED beads 220 faces the grating layer 300. When the light emitted by the LED beads 220 passes through the grating layer 300, it is split into multiple light waves and diffuses in all directions. These diffused light waves meet again and interfere, projecting a three-dimensional image onto a wall or ground, thus achieving holographic projection of the neon light strip.

[0054] Please see Figure 2 and Figure 5 In one embodiment, the grating layer 300 includes a PET film and a periodic nanograting structure printed on the PET film; wherein the grating period of the grating layer 300 is gradually reduced or increased in the axial direction of the receiving cavity; and / or the grating period of the grating layer 300 is greater than or equal to 300 nm and less than or equal to 500 nm.

[0055] In one embodiment, the PET film has a thickness of approximately 0.2 mm. A periodic nanograting structure is printed onto the PET film using nanoimprint lithography. Specifically, a quartz template with an etched periodic nanograting structure is used, and the PET film is hot-pressed at 110°C, followed by UV curing to obtain the grating layer 300. Of course, in other embodiments, the thickness of the PET film can be flexibly set according to actual conditions, and is not limited here.

[0056] Short-wavelength light is more easily diffracted at shorter grating periods, while long-wavelength light is more easily diffracted at longer grating periods. In one embodiment, the grating period of the grating layer 300 is linearly varied and gradually decreases in the axial direction of the receiving cavity away from the power line, so that the light is focused at the end away from the power line and diffused at the end closer to the power line. In another embodiment, the grating period of the grating layer 300 is linearly varied and gradually increases in the axial direction of the receiving cavity away from the power line, so that the light is diffused at the end away from the power line and focused at the end closer to the power line, allowing the projection system to cover a viewing angle greater than or equal to 120 degrees. The grating period can be set to decrease or increase depending on the application requirements; no limitation is imposed here.

[0057] The grating period of the grating layer 300 is the spacing between adjacent grating lines in the grating structure. The diffraction efficiency of the grating layer 300 is closely related to the grating period and the wavelength of the incident light. When the grating period is close to the wavelength of the incident light, the grating layer 300 has the strongest ability to control the light. In the visible light band, which is generally between 400 nm and 700 nm, the grating layer 300 can achieve high transmittance in the visible light band, especially in the shorter wavelengths. The shorter wavelengths of visible light, such as blue and green light, generally have wavelengths between 450 nm and 495 nm and between 495 nm and 570 nm, respectively. When the grating period is between 300 nm and 500 nm, the grating layer 300 effectively interacts with blue and green light, achieving efficient diffraction. The wavelength of red light is generally between 620nm and 700nm. Considering the existence of diffraction angle, even if the grating period is between 300nm and 500nm, the grating layer 300 will still diffract red light to a certain extent. The grating period of the grating layer 300 can be 300nm, 400nm, or 500nm, etc., as long as it is greater than or equal to 300nm and less than or equal to 500nm; no restrictions are imposed here.

[0058] In one embodiment, the grating period of the grating layer 300 is greater than or equal to 300 nm and less than or equal to 500 nm, and the grating period of the grating layer 300 is gradually decreasing or increasing in the axial direction of the receiving cavity away from the power line. In another embodiment, the grating period of the grating layer 300 linearly increases from 300 nm to 500 nm in the axial direction of the receiving cavity away from the power line. In yet another embodiment, the grating period of the grating layer 300 linearly decreases from 500 nm to 300 nm in the axial direction of the receiving cavity.

[0059] The technical solution of this utility model embodiment involves printing a periodic nanograting structure onto a PET film. The PET film has high light transmittance, improving light transmittance; furthermore, the PET film has good flexibility, enhancing the adaptability of the grating layer 300. By setting the grating period to gradually increase or decrease, the light control capability of the grating layer 300 can be improved to achieve uniform brightness holographic projection or high brightness and high contrast holographic projection. Moreover, the linear change of the grating period reduces light distortion during propagation, improving light uniformity and imaging quality. By limiting the grating period, the grating layer 300 can efficiently control visible light, causing significant diffraction and interference effects, thereby improving the clarity and brightness of the holographic projection.

[0060] Please see Figures 2 to 4 In one embodiment, the neon light strip also includes a liquid crystal phase modulator 400, which is disposed in the receiving cavity and located between the circuit board 210 and the grating layer 300. The liquid crystal phase modulator 400 is electrically connected to the circuit board 210. Under the action of voltage, the arrangement of liquid crystal molecules in the liquid crystal phase modulator 400 changes, so that the path of the light from the lamp bead 220 to the grating layer 300 is changed.

[0061] In one embodiment, the liquid crystal phase modulator 400 is spaced apart from the circuit board 210 and the grating layer 300. The ITO electrode pattern of the liquid crystal phase modulator 400 matches the grating period to ensure that the electric field distribution matches the grating layer 300, thereby precisely controlling the propagation direction and intensity distribution of light. The liquid crystal phase modulator 400 is connected to the circuit board 210 via electrode leads 410. The circuit board 210 can adjust the voltage received by the liquid crystal phase modulator 400 in real time to change the arrangement of liquid crystal molecules in real time. Since the propagation speed of light is different in liquid crystal molecules with different arrangements, the change in the arrangement of liquid crystal molecules will change the phase of light. That is, when the light from the lamp bead 220 passes through the liquid crystal phase modulator 400, the path of light passing through the liquid crystal phase modulator 400 will change due to the change in liquid crystal molecules, thereby changing the actual path length of light to reach the grating layer 300, and thus changing the effective period of the grating layer 300. In one embodiment, the thickness of the liquid crystal phase modulator 400 is approximately 0.1 mm, so that voltage can quickly penetrate the entire liquid crystal phase modulator 400, thereby changing the alignment of liquid crystal molecules more rapidly. Of course, in other embodiments, the thickness of the liquid crystal phase modulator 400 can be flexibly set according to actual needs, and is not limited here.

[0062] The technical solution of this utility model embodiment, by setting a liquid crystal phase modulator 400, can realize the change of the effective period of the grating layer 300, thereby realizing the dynamic change of the projected pattern and improving the diversification of neon light strip holographic projection.

[0063] Please see Figures 3 to 5 In one embodiment, the housing 100 includes an outer shell 110 and a support plate 120. The outer shell 110 has an internal cavity. The support plate 120 is disposed in the cavity and is located between the liquid crystal phase modulator 400 and the grating layer 300 and is attached to the grating layer 300.

[0064] In one embodiment, the overall thickness of the outer casing 110 is less than or equal to 20 mm, so that the overall thickness of the neon light strip is less than or equal to 20 mm. The specific thickness of the outer casing 110 can be flexibly set according to actual conditions and is not limited here. In one embodiment, the outer casing 110 includes a side plate 112 and two end plates 113. The side plate 112 is arranged around the outer periphery of the circuit board 210, the liquid crystal phase modulator 400, the support plate 120, and the grating layer 300. The two end plates 113 are located on opposite sides of the side plate 112 to encapsulate the circuit board 210, the liquid crystal phase modulator 400, the support plate 120, and the grating layer 300 within a receiving cavity. One end plate 113 has a through hole communicating with the receiving cavity for mounting a power supply line 130. In one embodiment, the thickness of the side plate 112 is approximately 0.5 mm to reduce light attenuation during propagation. Of course, in other embodiments, the thickness of the side plate 112 can be flexibly set according to actual needs and is not limited here. In this embodiment, one side plate 112 of the outer casing 110 is the light-emitting side 111, and one side of the support plate 120 is attached to the grating layer 300 so that the grating layer 300 is sandwiched between the support plate 120 and the side plate 112. In one embodiment, the support plate 120 is transparent and has a cavity to reduce light loss during propagation and improve light transmittance.

[0065] Please see Figure 2 and Figure 5 In one embodiment, the neon light strip further includes a light pattern adjustment section 500 disposed in the receiving cavity. The light pattern adjustment section 500 is located between the support plate 120 and the liquid crystal phase modulator 400 to shape the light transmitted by the liquid crystal phase modulator 400.

[0066] In one embodiment, the light pattern adjustment part 500 is configured as an arc-shaped transparent silicone material. When light passes through the liquid crystal phase modulator 400, it passes through the light pattern adjustment part 500, which diffuses the light to ensure uniform diffusion to the grating layer 300. The degree of light divergence can be adjusted by changing the curvature of the light pattern adjustment part 500. In one embodiment, the light pattern adjustment part 500 is integrally formed with the support plate 120 to improve structural stability. Of course, in other embodiments, the light pattern adjustment part 500 may also be configured as a concave lens, etc., and this is not a limitation.

[0067] The technical solution of this utility model embodiment provides protection for the neon light strip by providing the outer shell 110. The support plate 120 fixes and supports the grating layer 300. The light pattern adjustment part 500 allows light to be uniformly diffused into the grating layer 300, thereby improving the diffraction efficiency of the grating layer 300 and the image quality of the holographic projection.

[0068] In one embodiment, the housing 100 is configured as silicone, and at least one of the grating layer 300, circuit board 210, liquid crystal phase modulator 400 and light pattern adjustment part 500 is co-extruded and integrally bonded with the housing 100.

[0069] In one embodiment, both the outer shell 110 and the support plate 120 are made of silicone. The grating layer 300, circuit board 210, liquid crystal phase modulator 400, and light pattern adjustment part 500 are co-extruded and laminated with the silicone shell 100, allowing the neon light strip to be formed in one piece, reducing the assembly process. In another embodiment, both the outer shell 110 and the support plate 120 are made of transparent silicone to improve light transmittance. In another embodiment, the PET film of the grating layer 300 is co-extruded and laminated with the shell 100. During the co-extrusion process, 5% nano-titanium dioxide is added to enhance light transmission uniformity. The circuit board 210, liquid crystal phase modulator 400, and light pattern adjustment part 500 are all installed in the receiving cavity by embedding or screwing. Of course, in other embodiments, the PET thin surface of the grating layer 300 can also be attached to the shell 100, so that the circuit board 210, liquid crystal phase modulator 400, or light pattern adjustment part 500 are co-extruded and laminated with the shell 100. No limitation is imposed here.

[0070] The technical solution of this utility model embodiment, by using silicone as the housing 100, allows for more refined and complex internal structures due to the flexibility and plasticity of silicone, thus achieving better projection effects. Integrating the neon light strip into the design improves its structural stability. Furthermore, this integrated design reduces light reflection and scattering losses during transmission, thereby improving light transmission efficiency.

[0071] Please see Figure 3 and Figure 4 In one embodiment, multiple LED beads 220 are spaced apart on the circuit board 210, and all of the multiple LED beads 220 are configured as tri-color LED beads 220.

[0072] The color and shape of a holographic projection depend on the color and intensity distribution of light. In one embodiment, each LED 220 can emit green, blue, and red light to achieve full-color holographic projection. The number of LEDs 220 can be flexibly set according to actual needs and is not limited here.

[0073] Please see Figures 3 to 5In one embodiment, the LED bead 220 is configured as a quantum dot LED, and the circuit board 210 is provided with a plurality of PWM drive chips 230 at intervals. The plurality of PWM drive chips 230 work independently and are electrically connected to the quantum dot LEDs one by one to control the brightness of the quantum dot LEDs.

[0074] Quantum dot LEDs have lower power consumption, reducing it by approximately 30% compared to ordinary LEDs. Furthermore, quantum dot LEDs exhibit stronger coherence than ordinary LEDs, further ensuring the imaging effect of holographic projection. The PWM driver chip 230 outputs a periodic pulse signal to the quantum dot LED. This pulse signal has a high level and a low level within each cycle; the proportion of the high-level time within the cycle determines the brightness of the quantum dot LED—a higher proportion results in greater brightness. In one embodiment, the quantum dot LEDs and PWM driver chips 230 are spaced apart, with each PWM driver chip 230 electrically connected to one quantum dot LED, adjusting the brightness of the quantum dot LED by controlling the proportion of the high level in the pulse signal.

[0075] Please see Figure 4 and Figure 5 In one embodiment, the neon light strip also includes an FPGA chip 240, which is disposed on the side of the circuit board 210 away from the grating layer 300 and electrically connected to the circuit board 210, to control the color of the light emitted by the multiple LED beads 220.

[0076] In one embodiment, the operating state of each LED 220 is independent. The FPGA chip 240 can control the color of all LEDs 220 by controlling the proportion of the light colors of all LEDs 220. In one embodiment, the PWM driver chip 230 is electrically connected to the FPGA chip 240 through the circuit board 210. The FPGA chip 240 can control the PWM driver chip 230, thereby controlling the brightness of the LEDs 220 and thus controlling the light intensity of each LED 220. The function of the FPGA chip 240 can be implemented through logic algorithms, which are not limited here.

[0077] In one embodiment, the PWM driver chip 230 is also electrically connected to the liquid crystal phase modulator 400 via the circuit board 210, and the FPGA chip 240 can also control the liquid crystal phase modulator 400. That is, the FPGA chip 240 controls the overall luminous effect of the neon light strip by comprehensively controlling the PWM driver chip 230 and the liquid crystal phase modulator 400.

[0078] The technical solution of this utility model embodiment, by setting three-color LED beads 220, can achieve full-color holographic projection. By setting quantum dot LEDs and a PWM driver chip 230, the brightness of the neon light strip can be controlled while reducing the power consumption of the neon light strip. By setting an FPGA chip 240, the brightness and color of the light can be controlled to achieve dynamic adjustment of the color and shape of the holographic projection, further improving the diversity of holographic projection of the neon light strip.

[0079] Please see Figure 2 and Figure 4 In one embodiment, the neon light strip also includes a graphene thermal conductive film 250, one side of which is attached to the circuit board 210, and the other side of the graphene thermal conductive film 250 is attached to the FPGA chip 240.

[0080] During the use of the neon light strip, the LED beads 220, circuit board 210, and FPGA chip 240 all generate heat. The heat generated by the LED beads 220 is concentrated in the part in contact with the circuit board 210. In one embodiment, the graphene thermal conductive film 250 has a thickness of approximately 0.05 mm and a thermal conductivity of approximately 1500 W / m·K. This film can absorb the heat from the FPGA chip 240 and circuit board 210 and conduct the heat to the housing 100, thus maintaining the temperature of the FPGA chip 240 and circuit board 210 below 45°C. Of course, in other embodiments, the thickness of the graphene thermal conductive film 250 can also be set to 0.04 mm or 0.06 mm, or flexibly set according to actual heat dissipation requirements. No limitation is imposed here.

[0081] The technical solution of this utility model embodiment, by setting a graphene thermal conductive film 250, can transfer the heat accumulated on the circuit board 210 and FPGA chip 240 to the housing 100, making the temperature of the neon light strip more uniform, avoiding local overheating, and improving the service life of the FPGA chip 240 and circuit board 210.

[0082] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A neon light strip, characterized in that, include: The shell has an internal cavity; A circuit board is disposed at the bottom of the receiving cavity; The LED bead is located on the side of the circuit board away from the bottom of the receiving cavity, and the light emission direction of the LED bead is towards the light-emitting side of the receiving cavity; as well as A grating layer is disposed on the light-emitting side of the receiving cavity and is arranged parallel to and spaced apart from the circuit board.

2. The neon light strip as described in claim 1, characterized in that, The grating layer includes a PET film and a periodic nanograting structure printed on the PET film; Wherein, the grating period of the grating layer is set to gradually decrease or increase along the axial direction of the receiving cavity; and / or The grating period of the grating layer is greater than or equal to 300 nm and less than or equal to 500 nm.

3. The neon light strip as described in claim 1, characterized in that, The neon light strip also includes: A liquid crystal phase modulator is disposed in the receiving cavity and located between the circuit board and the grating layer. The liquid crystal phase modulator is electrically connected to the circuit board. Under the action of voltage, the arrangement of liquid crystal molecules in the liquid crystal phase modulator changes, thereby changing the path of the light from the lamp beads to the grating layer.

4. The neon light strip as described in claim 3, characterized in that, The housing includes: The outer casing, having the receiving cavity inside; and A support plate is disposed in the receiving cavity, the support plate being located between the liquid crystal phase modulator and the grating layer and being in contact with the grating layer.

5. The neon light strip as described in claim 4, characterized in that, The neon light strip also includes: A light pattern adjustment unit is disposed in the receiving cavity, and the light pattern adjustment unit is located between the support plate and the liquid crystal phase modulator to shape the light transmitted by the liquid crystal phase modulator.

6. The neon light strip as described in claim 5, characterized in that, The housing is made of silicone, and at least one of the grating layer, the circuit board, the liquid crystal phase modulator, and the light pattern adjustment part is co-extruded and integrally bonded with the housing.

7. The neon light strip as described in claim 3, characterized in that, The LED beads are arranged at intervals on the circuit board, and each of the LED beads is configured as a tri-color LED bead.

8. The neon light strip as described in claim 7, characterized in that, The LED beads are configured as quantum dot LEDs, and the circuit board is provided with multiple PWM drive chips at intervals. The multiple PWM drive chips work independently and are electrically connected to the multiple quantum dot LEDs in a one-to-one correspondence to control the brightness of the quantum dot LEDs.

9. The neon light strip as described in claim 8, characterized in that, The neon light strip also includes: An FPGA chip is located on the side of the circuit board away from the grating layer and is electrically connected to the circuit board to control the color of the light emitted by the plurality of LED beads.

10. The neon light strip as described in claim 9, characterized in that, The neon light strip also includes a graphene thermal conductive film, one side of which is attached to the circuit board, and the other side of which is attached to the FPGA chip.

Images