An outdoor LED grid display screen

Abstract

This utility model belongs to the field of LED display technology and discloses an outdoor LED grid display screen, including multiple LED light source emitters arranged in a grid array. Each LED light source emitter includes an emitter body and a light source emitting head. One side of the emitter body is a mounting surface and is mounted on a mounting frame. Multiple light source emitting heads are correspondingly embedded on the end face of the emitter body away from the mounting surface. The light emitted by the light source emitting heads is emitted horizontally in a wide-angle manner. Each light source emitter is equipped with a reflector located above the light source emitting head. One end face of the reflector is an inclined mirror surface, with its lower end abutting against the end face of the emitter body away from the mounting surface and its upper end away from this end face, so as to reflect part of the light emitted upwardly by the light source emitting head in a horizontal direction. This grid display screen can reduce the upward tilt of light and reflect it in a horizontal direction, thereby improving the brightness of the light and the clarity of the display screen.

Description

Technical Field

[0001] This utility model relates to the field of LED display technology, and more specifically to an outdoor LED grid display screen. Background Technology

[0002] Outdoor LED grid displays, also known as LED wall displays, are electronic screens installed on building walls, composed of LED light sources. The grid arrangement, controlled by software, projects images onto each display unit in a grid pattern, achieving the LED wall display effect. There is no light crosstalk between adjacent display units. Compared with traditional displays, it has significant technical advantages and can perfectly display various high-requirement video effects, making the picture display softer and more comfortable, and not dazzling when viewed at close range for a long time.

[0003] However, conventional outdoor grid LED displays are often installed on high walls, and viewers can only view the screen content by looking straight ahead from a distance or looking up from a close distance. This results in the upward light projected by the display being wasted, and the text and patterns cannot be clearly seen due to insufficient brightness. It is necessary to increase the output power in a normal ambient light environment to achieve the required brightness for viewing.

[0004] Therefore, how to provide a way to make reasonable use of upward-facing light so that the text and images of advertisements can be clearly seen in bright daylight is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides an outdoor LED grid display screen, which reflects the light emitted by LED lights through a reflector, so as to reflect the light that is directed upwards to the surroundings and downwards, thereby reducing light waste and converging the light to improve brightness, thus solving the problem that the text and images of the displayed advertisements cannot be clearly seen in bright daylight.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An outdoor LED grid display screen includes:

[0008] Mounting framework;

[0009] The LED light source emitter comprises multiple LED light source emitters arranged in a grid-like array. Each LED light source emitter includes an emitter body and a light source emitting head. One side of the emitter body is a mounting surface, and each emitter body is mounted on a mounting frame via this mounting surface. The light source emitting head is correspondingly embedded in the end face of the emitter body away from the mounting surface, and the light emitted by the light source emitting head is emitted in a wide-angle manner along the horizontal direction. Adjacent light source emitting heads are connected by signal lines.

[0010] The number of reflectors corresponds to the number of LED light source emitters and they are installed one-to-one on one end face above the corresponding light source emitter head. One end face of the reflector is an inclined mirror surface. The lower end of the inclined mirror surface abuts against the end face of the emitter body away from the mounting surface, and the upper end is away from the end face, so as to reflect part of the light emitted by the light source emitter head at an upward tilt towards the horizontal direction.

[0011] The controller is electrically connected to multiple LED light source emitters to receive transmitted signals.

[0012] Through the above technical solution, this utility model discloses an outdoor LED grid display screen. Adjacent LED light source emitters are connected by signal lines. Control signals are emitted from the control terminal of the display screen and transmitted sequentially to each LED light source emitter via signal lines, achieving precise control of each light-emitting unit and ensuring that the display screen can display according to the preset program and content. The light source emitting heads of the LED light source emitters are arranged horizontally, and the generated light propagates and diffuses in a wide-angle direction horizontally. A reflector is installed inside the LED light source emitter and located above the light source emission port. The lower end surface of the reflector is an inclined mirror surface. When light comes into contact with the lower end surface of the reflector, the inclined mirror surface reflects the light, causing the light to be reflected horizontally and downwards, concentrating the light at the lower middle position, thereby enhancing the brightness and range of the light and improving the viewing distance and display effect of the display screen in outdoor environments. Since outdoor LED grid display screens are generally installed at high positions, pedestrians usually look up when viewing them. By increasing the brightness of the light emitted at the lower middle position, the content of the display screen can be clearly seen even in bright sunlight, providing pedestrians with bright and vivid images and videos.

[0013] Furthermore, the LED light source emitter is provided with a protective housing, and one side wall of the protective housing corresponding to the light source emitter head is a transparent plate. The light source emitter head is located between the emitter body and the transparent plate.

[0014] The beneficial effects of adopting the above technical solution are: the protective shell provides a sturdy outer shell for the LED light source emitter, which can effectively prevent external objects such as stones, hail, birds, etc. from directly impacting the LED light source emitter and avoid damage to it.

[0015] Furthermore, the protective housing has multiple heat dissipation holes on one side wall near the mounting surface, corresponding to the light source emitting head.

[0016] The beneficial effects of adopting the above technical solution are as follows: the opening of heat dissipation holes provides a channel for heat to dissipate quickly, allowing heat to be discharged from the protective shell in a timely manner, effectively reducing the operating temperature of the LED light source emitter and improving its luminous efficiency and stability.

[0017] Furthermore, a snap-fit ​​component that engages with the mounting frame is integrally connected to one side wall of the protective housing near the mounting surface.

[0018] The advantages of adopting the above technical solution are: the snap-fit ​​method between the connector and the mounting frame does not require complicated tools and cumbersome procedures, and installers can quickly fix the protective shell to the mounting frame, thus achieving efficient assembly of the display screen.

[0019] Furthermore, it also includes an arc-shaped cover, which is mounted on the transparent plate.

[0020] The beneficial effects of adopting the above technical solution are as follows: The curved cover can better protect the LED light source emitter, preventing direct impact and damage from external objects, and can also resist a certain degree of harsh weather, such as rain and dust erosion, thus extending the service life of the display screen. At the same time, the curved cover can further guide and optimize the light after refraction and convergence by the lens, making the light more evenly distributed on the surface of the display screen, improving the overall brightness and uniformity of the display screen, ensuring that viewers can still clearly see the content on the display screen in bright outdoor environments. Furthermore, the special shape of the curved cover can reduce glare and reflection on the screen surface, so that viewers will not be disturbed by too much light when viewing the display screen in strong light environments, thus providing a better visual experience.

[0021] Furthermore, the outer surface of the arc-shaped cover is a smooth wall to avoid dust accumulation.

[0022] The advantages of adopting the above technical solution are: reduced dust accumulation, making cleaning easier and more efficient. Maintenance personnel no longer need to perform frequent deep cleaning of the display screen; simply wiping the curved surface periodically is sufficient to keep it clean and tidy, saving cleaning time and labor costs.

[0023] Furthermore, the reflector is an inverted semi-cone, and its top plane is fixed to the lower end face of the top plate of the arc-shaped cover, its side plane is fixed to the top of the outer wall of the transparent plate, and the tilted mirror surface is arranged at intervals with the inner wall of the arc-shaped cover.

[0024] The beneficial effects of adopting the above technical solution are as follows: the semi-conical shape of the reflector makes the light distribution more uniform, avoiding problems such as light spots and dark areas, and improving the brightness uniformity of the display screen. This makes the entire display screen more visually consistent and improves the display quality.

[0025] Furthermore, it also includes a lens one, which is a semi-circular truncated cone and located below the reflector. The lower end of the arc-shaped sidewall of the lens one is inclined towards the center, and its side plane has a light-facing opening corresponding to the light-emitting head. The edge wall of the light-facing opening is fixed to the outer side wall of the transparent plate. The inside of the lens one is a refraction cavity one, and its upper plane can intercept and refract light downwards. The side arc surface of the lens one can refract light in all directions. The lower plane of the lens one has a light-emitting opening.

[0026] The beneficial effects of adopting the above technical solution are as follows: the upper plane of lens one can intercept the light refracted by the reflector and refract it downwards, while the side arc surface can refract the light in all directions, so that the light can propagate along a specific path and angle, effectively avoiding the disorderly dispersion of light, enhancing the control of light, and improving the light utilization rate of the display screen; it makes the light more evenly distributed throughout the display area, solving the problem of local overbrightness or underbrightness, thereby improving the brightness uniformity of the display screen and allowing viewers to obtain a good visual experience from different angles.

[0027] Furthermore, it also includes a second lens, one side wall of which is fixed to the transparent plate and located below the first lens. The top wall of the second lens has a light inlet corresponding to the light outlet. The second lens has a second refraction cavity inside, and the side wall of the second refraction cavity is an arc-shaped surface to refract the light entering the second refraction cavity in all directions and downwards.

[0028] The beneficial effects of adopting the above technical solution are as follows: The sidewalls of the refractive cavity of lens two are arc-shaped, which can reflect the light entering the refractive cavity two to the surroundings and downwards, further optimizing the light distribution and enabling the light to cover the entire display area more evenly, avoiding local over-brightness or under-brightness, and improving the brightness uniformity of the display screen; and by setting a light inlet on the top wall of lens two opposite to the light outlet, the intensity of the light entering the refractive cavity two is reduced, thereby reducing the intensity of the light reflected downwards, so that when pedestrians view the display screen at close range below, the light intensity will not affect their eyes due to excessive light intensity, thus improving the close-range viewing effect.

[0029] Furthermore, the reflector, lens one, and lens two are all made of optical-grade polymethyl methacrylate.

[0030] The beneficial effects of adopting the above technical solution are as follows: Optical-grade polymethyl methacrylate (PMMA) has a light transmittance of over 92%, enabling light to pass through the reflector, lens one, and lens two efficiently, reducing light energy loss, improving the light efficiency of the entire optical system, ensuring that the display screen can obtain sufficient brightness, and maintaining a clear and bright display effect even in strong outdoor light environments; it also has excellent optical performance, which can precisely control the refraction and reflection path of light, so that the light propagates and distributes according to the design requirements, thereby improving the display quality of the display screen, making the displayed content such as images and text clearer, sharper, and the colors more vivid and accurate. Attached Figure Description

[0031] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the LED grid display screen of this utility model.

[0033] Figure 2 This is an axonometric view of the LED light source emitter of this utility model from one angle.

[0034] Figure 3 This is an axonometric view of the LED light source emitter of this utility model from another angle.

[0035] Figure 4 for Figure 2 A sectional view.

[0036] Figure 5 for Figure 4 The diagram shows the curved cover, the reflector, lens one, and lens two.

[0037] Figure 6 This is a schematic diagram of the light refraction path between the light source emitting head and the reflector of this utility model.

[0038] 1-LED light source emitter, 11-Light source emitter head, 2-Reflector, 21-Tilted mirror, 3-Arc-shaped cover, 4-Lens 1, 41-Light outlet, 5-Lens 2, 51-Light inlet, 6-Protective housing, 61-Transparent plate, 62-Heat dissipation hole, 63-Snap-fit ​​component. Detailed Implementation

[0039] 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 protection scope of the present utility model.

[0040] This utility model discloses an outdoor LED grid display screen, including: multiple LED light source emitters 1 arranged in a grid array; each LED light source emitter 1 includes an emitter body and a light source emitting head 11, one side of the emitter body is a mounting surface and is mounted on a mounting frame through the mounting surface; the light source emitting head 11 is correspondingly embedded on the end face of the emitter body away from the mounting surface, and the light from the light source emitting head 11 is emitted in a wide-angle manner in the horizontal direction; the light source emitting heads 11 of adjacent emitter bodies are connected by signal lines; each LED light source emitter 1 is equipped with a corresponding reflector 2 located above the light source emitting head 11, one side wall of the reflector 2 is an inclined mirror surface 21, the lower end of the inclined mirror surface 21 abuts against the end face of the emitter body away from the mounting surface, and the upper end is away from the end face, so as to reflect part of the light emitted by the light source emitting head 11 in the upward tilting direction in the horizontal direction; each LED light source emitter 1 is electrically connected to a controller to receive the transmission signal.

[0041] In one specific embodiment of the protective housing 6 in this utility model, the protective housing 6 is disposed outside the LED light source emitter 1, and one side wall of the protective housing corresponding to the light source emitting head 11 is a transparent plate 61, with the light source emitting head 11 located between the emitter body and the transparent plate 61. The protective housing 6 provides a sturdy outer shell for the LED light source emitter 1, effectively preventing external objects such as stones, hail, birds, etc., from directly impacting the LED light source emitter 1 and avoiding damage to it.

[0042] In the above embodiment, a plurality of heat dissipation holes 62 are also provided on the side wall of the protective housing 6 near the mounting surface corresponding to the light source emitter 11. The opening of the heat dissipation holes 62 provides a channel for rapid heat dissipation, allowing heat to be discharged from the protective housing 6 in a timely manner, effectively reducing the operating temperature of the LED light source emitter 1, and improving its luminous efficiency and stability.

[0043] In the above embodiment, a snap-fit ​​component 63 is integrally connected to one side wall of the protective housing 6 near the mounting surface, which engages with the mounting frame. The snap-fit ​​component 63 engages with the mounting frame without the need for complex tools or cumbersome procedures, allowing installers to quickly fix the protective housing 6 to the mounting frame, thus achieving efficient assembly of the display screen.

[0044] In another embodiment of this utility model, an arc-shaped cover 3 is also included, which is mounted on the transparent plate 61. The arc-shaped cover 3 can better protect the LED light source emitter, preventing direct impact and damage to the light source emitter 1 from external objects. It can also resist a certain degree of harsh weather, such as rain and dust erosion, extending the service life of the display screen. At the same time, the arc-shaped cover 3 can further guide and optimize the light after refraction and convergence by the lens, making the light more evenly distributed on the surface of the display screen, improving the overall brightness and uniformity of the display screen, ensuring that viewers can still clearly see the content on the display screen in bright outdoor environments. Furthermore, the special shape of the arc-shaped cover 3 can reduce glare and reflection on the screen surface, so that viewers will not be disturbed by too much light when viewing the display screen in strong light environments, thus providing a better visual experience.

[0045] In the above embodiment, the outer surface of the curved cover 3 is a smooth wall to avoid dust accumulation. Reduced dust accumulation makes cleaning easier and more efficient. Maintenance personnel do not need to perform frequent deep cleaning of the display screen; simply wiping the surface of the curved cover 6 periodically is sufficient to keep it clean and tidy, saving cleaning time and labor costs.

[0046] In one specific embodiment of this utility model, the reflector 2 is an inverted semi-cone, with its top plane fixed to the lower end face of the top plate of the arc-shaped cover 3, and its side plane fixed to the outer wall of the transparent plate. The inclined mirror surface 21 is spaced apart from the inner wall of the arc-shaped cover 3. The semi-conical shape of the reflector 2 makes the light distribution more uniform, avoiding problems such as light spots and dark areas, and improving the brightness uniformity of the display screen. This makes the entire display screen visually more consistent and improves the display quality.

[0047] In other embodiments of this utility model, a lens 4 is also included. Lens 4 is a semi-conical truncated cone located below the reflector 2. The lower end of the arc-shaped sidewall of lens 4 is inclined towards the center, and its side plane has a light-facing opening corresponding to the light source emitting head 11. The edge wall of the light-facing opening is fixed to the transparent plate 61. A refraction cavity 1 is formed inside lens 4. Its upper plane can intercept and refract light downwards, and its side arc surface can refract light in all directions. A light-emitting port 41 is formed on the lower plane of lens 4. The upper plane of lens 4 can intercept the light refracted from the reflector 2 and refract it downwards, while the side arc surface can refract light in all directions, allowing the light to propagate along a specific path and angle. This effectively avoids disordered light dispersion, enhances the control over light, and improves the light utilization rate of the display screen. It also makes the light more evenly distributed throughout the display area, solving the problem of local over-brightness or under-brightness, thereby improving the brightness uniformity of the display screen and allowing viewers to obtain a good visual experience from different angles.

[0048] In the above embodiment, a second lens 5 is also included. One side wall of the second lens 5 is fixed to the transparent plate 61 and located below the first lens 4. The top wall of the second lens 5 has a light inlet 51 corresponding to the light outlet 41. A second refraction cavity is formed inside the second lens 5, and the side wall of the second refraction cavity is arc-shaped to refract the light entering the second refraction cavity in all directions and downwards. The arc-shaped side wall of the second refraction cavity of the second lens 5 can reflect the light entering the second refraction cavity in all directions and downwards, further optimizing the light distribution, so that the light can cover the entire display area more evenly, avoiding the phenomenon of local over-brightness or under-brightness, and improving the brightness uniformity of the display screen. Furthermore, by setting a light inlet 51 on the top wall of the second lens 5 opposite to the light outlet 41, the intensity of the light entering the second refraction cavity is reduced, thereby reducing the intensity of the light reflected downwards. This ensures that when pedestrians view the display screen at close range below, the light intensity will not affect their eyes due to excessive light intensity, thus improving the close-range viewing effect.

[0049] In one embodiment of this invention, the reflector 2, lens 4, and lens 5 are all made of optical-grade polymethyl methacrylate (PMMA). Optical-grade PMMA has a light transmittance of over 92%, enabling light to pass efficiently through the reflector 2, lens 4, and lens 5, reducing light loss, improving the overall luminous efficiency of the optical system, ensuring sufficient brightness for the display screen, and maintaining a clear and bright display even in strong outdoor light environments. Furthermore, it possesses excellent optical performance, precisely controlling the refraction and reflection paths of light, allowing light to propagate and distribute according to design requirements, thereby improving the display quality of the screen and making images and text clearer, sharper, and colors more vibrant and accurate.

[0050] The working principle of this outdoor LED grid display screen is as follows:

[0051] Adjacent LED light source emitters are connected by signal lines and mounted in a grid array on a mounting frame. The mounting frame is generally fixed vertically to a high position on the outer wall of the building. Control signals are emitted from the control terminal of the display screen and transmitted sequentially to each LED light source emitter via signal lines, achieving precise control of each light-emitting unit and ensuring that the display screen can display according to the preset program and content. The light source emitting head of the LED light source emitter is built into a protective housing and arranged horizontally. The light generated propagates and diffuses in a wide-angle direction in the horizontal direction. At the same time, the protective housing also includes a reflector, lens one, and lens two that can form a light path optimization system. The scattered light emitted by the light source emitting head needs to pass through the light path optimization system. Among them, the upwardly scattered light is reflected to the horizontal direction after encountering the tilted mirror surface of the reflector. The horizontal light then enters the refraction cavity one and is uniformly scattered horizontally by the arc-shaped side of lens one. At the same time, by setting interconnected light outlets and light inlets, the light intake area of ​​lens two is controlled, thereby reducing the intensity of the light refracted downward by the arc-shaped sidewall of lens two and reducing the display brightness, so that pedestrians can view it from a close distance by looking up.

[0052] Therefore, this outdoor LED grid display screen forms an optimized light path system by simultaneously setting up a reflector, lens one, and lens two, which makes reasonable use of light, reduces light waste, and concentrates the light in the horizontal direction, thereby increasing the brightness of the light in the horizontal direction. This ensures that the text and images of the displayed advertisements can be clearly seen even in bright daylight, while also reducing the intensity of the downward-sloping light, thus reducing the light stimulation to the eyes of pedestrians viewing at close range.

[0053] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An outdoor LED grid display screen, characterized in that, include: Mounting framework; LED light source emitter (1), wherein there are multiple LED light source emitters (1) arranged in a grid array; each of the multiple LED light source emitters (1) includes an emitter body and a light source emitting head (11), one side of the emitter body is a mounting surface and is mounted on the mounting frame through the mounting surface; the light source emitting head (11) is correspondingly embedded on the end face of the emitter body away from the mounting surface, and the light from the light source emitting head (11) is emitted in a wide-angle manner in the horizontal direction; the light source emitting heads (11) of adjacent emitter bodies are connected by signal lines; The number of reflectors (2) corresponds to the number of LED light source emitters (1) and they are installed one by one on one end face above the corresponding light source emitter head (11). One side wall of the reflector (2) is an inclined mirror surface (21). The lower end of the inclined mirror surface (21) abuts against the side end face of the emitter body away from the mounting surface, and the upper end is away from the end face, so as to reflect part of the light emitted by the light source emitter head (11) tilted upwards to the horizontal direction. The controller, in which multiple LED light source emitters (1) are electrically connected to the controller to receive transmission signals; The LED light source emitter (1) is provided with a protective shell (6) on the outside, and the side wall of the protective shell corresponding to the light source emitter head (11) is a transparent plate (61). The light source emitter head (11) is located between the emitter body and the transparent plate (61). An arc-shaped cover (3) is mounted on the transparent plate (61); Lens 1 (4), the lens 1 (4) is a semi-conical frustum and is located below the reflector (2). The lower end of the arc-shaped sidewall of the lens 1 (4) is inclined towards the center. Its side plane has a light-facing opening corresponding to the light source emitting head (11). The edge wall of the light-facing opening is fixed on the transparent plate (61). The lens 1 (4) has a refraction cavity 1 inside. Its upper plane can intercept light and refract it downward. Its side arc surface can refract light to all sides. The lower plane of the lens 1 (4) has a light-emitting opening (41). Lens 2 (5), one side wall of which is fixed on the transparent plate (61) and located below the lens 1 (4), the top wall of the lens 2 (5) is provided with a light inlet (51) corresponding to the light outlet (41), and a refraction cavity 2 is provided inside the lens 2 (5), and the side wall of the refraction cavity 2 is an arc-shaped surface to refract the light entering the refraction cavity 2 to the surrounding area and downward.

2. The outdoor LED grid display screen according to claim 1, characterized in that, The protective housing (6) has multiple heat dissipation holes (62) on one side wall near the mounting surface, corresponding to the light source emitting head (11).

3. An outdoor LED grid display screen according to claim 1, characterized in that, The protective housing (6) also has a snap-fit ​​component (63) integrally connected to the side wall near the mounting surface, which snaps into the mounting frame.

4. An outdoor LED grid display screen according to claim 1, characterized in that, The outer surface of the arc-shaped cover (3) is a smooth wall to avoid dust accumulation.

5. An outdoor LED grid display screen according to claim 4, characterized in that, The reflector (2) is an inverted semi-cone, and its top plane is fixed to the lower end face of the top plate of the arc-shaped cover (3), and its side plane is fixed to the outer wall of the transparent plate. The tilted mirror (21) is arranged at intervals with the inner wall of the arc-shaped cover (3).

6. An outdoor LED grid display screen according to claim 1, characterized in that, The reflector (2), lens one (4) and lens two (5) are all made of optical grade polymethyl methacrylate.

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