Light-emitting module and warning light

Abstract

This invention discloses a light-emitting module and a warning light, relating to the field of warning lights. The light-emitting module includes a light source assembly and a lampshade. The light source assembly is disposed inside the lampshade and is used to emit a light beam so that the light beam can pass through the lampshade. The lampshade includes a top wall and a side wall extending from the edge of the top wall in a direction away from the top wall. The side wall forms a light guide structure, which is used to guide the light beam to exit from the side wall. The cooperation between the light source assembly and the light guide structure allows the light beam to pass through the light guide structure, thereby increasing the number of light beams emitted from the side wall, so that the light beam can be emitted from the lampshade at all angles, achieving the warning requirement at a longer distance in the absence of fog at night.

Description

Technical Field

[0001] This invention relates to the field of warning light technology, and in particular to a light-emitting module and a warning light. Background Technology

[0002] LED (Light Emitting Diode) is a solid-state semiconductor device that converts electrical energy into visible light; it can directly convert electricity into light. In warning lights, LEDs are usually used in conjunction with lamp covers. However, the light emitted by existing LEDs (light sources) cannot be emitted through the lamp cover at all angles, making it impossible to achieve the required warning distance at night in fog-free conditions. Summary of the Invention

[0003] Therefore, it is necessary to provide a light-emitting module and warning light to solve the technical problem that the light emitted by existing LEDs (light sources) cannot be emitted from the lampshade at all angles, and cannot achieve the warning requirement of a long distance at night in the absence of fog.

[0004] In a first aspect, the present invention provides a light-emitting module, comprising: a light source assembly and a lampshade, wherein the light source assembly is disposed within the lampshade and is used to emit a light beam, the lampshade comprising a top wall and a side wall extending from the edge of the top wall in a direction away from the top wall, the side wall forming a light-guiding structure for guiding the light beam to be emitted from the side wall.

[0005] In one embodiment, the light guide structure is provided in multiple forms and is distributed circumferentially at intervals on the sidewall.

[0006] In one embodiment, the surface of the light guide structure is formed with an etched surface.

[0007] In one embodiment, the light guide structure extends along the extension direction of the sidewall, and the extension direction of the sidewall is set at an angle of 1 to 2 degrees relative to the axial direction of the lampshade.

[0008] In one embodiment, the light source assembly includes a light source plate, an inner light source, and an outer light source. The light source plate is disposed opposite to the top wall. The inner light source is disposed on the light source plate and is located near the center of the light source plate. The outer light source is arranged in a ring around the inner light source and is located near the side wall of the lampshade.

[0009] In one embodiment, the inner light source includes a first red LED and a first blue LED, and multiple first red LEDs and first blue LEDs are provided and arranged at intervals to form a first ring.

[0010] The outer light source includes a second red LED and a second blue LED. Multiple second red LEDs and second blue LEDs are provided and are arranged at intervals to form a second ring. The second ring is located outside the first ring.

[0011] In one embodiment, the light guide structure forms a first projection relative to the orthographic projection of the light source plate, and at least a portion of the second annulus is located at the center of the first projection.

[0012] In one embodiment, the line connecting one of the first red LEDs to the center of the light source board is the third line, and the line connecting the adjacent first blue LED to the center of the light source board is the fourth line. The third line and the fourth line are set at an angle of 85 degrees to 95 degrees.

[0013] The line connecting one of the second red LEDs to the center of the light source board is the fifth line, and the line connecting the adjacent second blue LED to the center of the light source board is the sixth line. The fifth line and the sixth line are set at an angle of 25 to 35 degrees.

[0014] In one embodiment, each of the first red LEDs, each of the first blue LEDs, each of the second red LEDs, and each of the second blue LEDs are no more than 50 mm away from the top wall.

[0015] Secondly, the present invention also provides a warning light, the warning light comprising the light-emitting module of any of the above embodiments.

[0016] Implementing the embodiments of the present invention will have the following beneficial effects:

[0017] The light-emitting module and warning light of the present invention have a light source component disposed inside the lampshade and used to emit a light beam so that the light beam can be emitted through the lampshade. The lampshade includes a top wall and a side wall extending from the edge of the top wall in a direction away from the top wall. The side wall is formed with a light guide structure, which is used to guide the light beam to be emitted from the side wall. The cooperation between the light source component and the light guide structure allows the light beam to be emitted through the light guide structure, thereby increasing the number of light beams emitted from the side wall, so that the light beam can be emitted from the lampshade at all angles, achieving the warning requirement at a longer distance in the absence of fog at night. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] in:

[0020] Figure 1 This is an isometric schematic diagram of the light-emitting film assembly in one embodiment.

[0021] Figure 2 for Figure 1 An exploded view of the light-emitting module shown.

[0022] Figure 3 for Figure 1 The front view of the light-emitting module shown.

[0023] Figure 4 for Figure 3 A cross-sectional view of AA in the luminescent film group shown.

[0024] Figure 5 This is a light intensity distribution diagram of blue and red light from a light-emitting module in one embodiment.

[0025] Figure 6 This is a schematic diagram of the light-emitting effect of the light-emitting module in one embodiment.

[0026] Reference numerals: 1. Lampshade; 11. Top wall; 12. Side wall; 121. Light guide structure; 2. Light source assembly; 21. Light source board; 22. Inner light source; 221. First red LED; 222. First blue LED; 23. Outer light source; 231. Second red LED; 232. Second blue LED. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0031] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0032] Please combine them together Figures 1 to 4 The light-emitting module provided by this invention will now be described. The light-emitting film assembly is used in a warning light. The light-emitting module includes a light source assembly 2 and a lampshade 1. The light source assembly 2 is disposed inside the lampshade 1 and is used to emit a light beam. The lampshade 1 includes a top wall 11 and a side wall 12 extending from the edge of the top wall 11 in a direction away from the top wall 11. The side wall 12 forms a light guide structure 121, which is used to guide the light beam out from the side wall 12. Specifically, the light guide structure 121 can be a prism or a protrusion.

[0033] It is understood that the light source assembly 2 is located inside the lampshade 1 and is used to emit a light beam so that the light beam can be emitted through the lampshade 1. The lampshade 1 includes a top wall 11 and a side wall 12 extending from the edge of the top wall 11 away from the top wall 11. The side wall 12 forms a light guide structure 121, which is used to guide the light beam to be emitted from the side wall 12. The cooperation between the light source assembly 2 and the light guide structure 121 allows the light beam to be emitted through the light guide structure 121, thereby increasing the number of light beams emitted from the side wall 12, so that the light beam can be emitted from the lampshade 1 at all angles, achieving the need for a longer distance warning in the absence of fog at night.

[0034] In this embodiment, multiple light guide structures 121 are provided and distributed circumferentially on the sidewall 12. This makes the light beam emitted by the light source assembly 2 more uniform after passing through the light guide structure 121, and enables it to be emitted at all angles.

[0035] In one embodiment, such as Figure 3 and Figure 4As shown, the light guide structure 121 extends along the extension direction of the side wall 12, and the extension direction of the side wall 12 is set at an angle of 1 to 2 degrees relative to the axial direction of the lampshade 1. Specifically, the total length of the light guide structure 121 is 50 mm, the width is 2.5 mm, and the maximum depth is 1.5 mm. In actual use, the beam of light emitted by the light source assembly 2 passes through the light guide structure 121 for a length of 15 mm and a depth of 1 mm. In some embodiments, the extension direction of the sidewall 12 is set at an angle of 1 degree, 1.5 degrees or 2 degrees relative to the axial direction of the lampshade 1. In a preferred embodiment, the extension direction of the sidewall 12 is set at an angle of 1.5 degrees relative to the axial direction of the lampshade 1. While ensuring the lampshade 1 has a good draft angle and aesthetics, the surface of the light guide structure 121 is formed with an etched surface, so that the light beam emitted by the light source assembly 2 is refracted and diffused through the light guide structure 121, increasing the amount of light emitted from the sidewall 12, so that the light distribution angle of the light source assembly 2 is increased to 180 degrees, and the light can also be observed on the sidewall 12 of the lampshade 1, achieving a better warning effect.

[0036] In one embodiment, such as Figure 2 As shown, the light source assembly 2 includes a light source plate 21, an inner light source 22, and an outer light source 23. The light source plate 21 is disposed opposite to the top wall 11, so that the light beams emitted by the inner light source 22 and the outer light source 23 can be emitted from the top wall 11 and the side wall 12. The inner light source 22 is disposed on the light source plate 21 and is located near the center of the light source plate 21, so that most of the light beam of the inner light source 22 is emitted from the top wall 11, and a small portion of the light beam of the inner light source 22 is emitted from the side wall 12. The outer light source 23 is arranged around the inner light source 22 and is located near the side wall 12 of the lampshade 1. Specifically, the inner light source 22 and the outer light source 23 are Lambertian light sources. The light intensity is the maximum when the emission angle is 0 degrees. The light guide structure 121 should be as close as possible to the center of the outer light source 23 to achieve the best effect. This requires the light guide structure 121 to be close enough to the outer light source 23 and to be long enough. The distance between the outer light source 23 and the light guide structure 121 is 12mm. At this time, the light emitted from the center of the outer light source 23 has the best effect.

[0037] In this embodiment, the inner light source 22 includes a first red LED 221 and a first blue LED 222. Multiple first red LEDs 221 and first blue LEDs 222 are provided and arranged in a first ring shape with intervals between them, so that the light beams emitted by the first red LEDs 221 and first blue LEDs 222 can be emitted from the top wall 11 of the lampshade 1. The light beams emitted by the first red LEDs 221 and first blue LEDs 222 are relatively uniform, achieving a better warning effect.

[0038] The outer light source 23 includes a second red LED 231 and a second blue LED 232. Multiple second red LEDs 231 and second blue LEDs 232 are provided and are arranged in a second ring at intervals to form a second ring. The second ring is located outside the first ring, so that the light beams emitted by the second red LEDs 231 and second blue LEDs 232 can be emitted from the top wall 11 of the lampshade 1 and also from the side wall 12, achieving a better light emission effect.

[0039] Furthermore, two, four, or six first red LEDs 221 and first blue LEDs 222 are provided, and different numbers of first red LEDs 221 and first blue LEDs 222 can be designed according to actual usage. Preferably, two first red LEDs 221 and two first blue LEDs 222 are provided. The line connecting one first red LED 221 to the center of the light source board 21 is the third line, and the line connecting the adjacent first blue LED 222 to the center of the light source board 21 is the fourth line. The third line and the fourth line are arranged at an angle of 85 to 95 degrees. Specifically, the angle between the third line and the fourth line is set to 85 degrees, 90 degrees, or 95 degrees. In a preferred embodiment, the angle between the third line and the fourth line is set to 90 degrees, so that the first red LEDs 221 and the first blue LEDs 222 are arranged at 90-degree intervals, so that the red and blue light emitted by the first red LEDs 221 and the first blue LEDs 222 on the lamp cover 1 is more uniform, and the warning effect is better.

[0040] There are six, eight, or ten second red LEDs 231 and second blue LEDs 232, and the number of second red LEDs 231 and second blue LEDs 232 can be designed according to actual use. Preferably, there are six second red LEDs 231 and six second blue LEDs 232. The line connecting one second red LED 231 to the center of the light source board 21 is the fifth line, and the line connecting the adjacent second blue LED 232 to the center of the light source board 21 is the sixth line. The fifth line and the sixth line are at an angle of 25 to 35 degrees. Specifically, the angle between the fifth and sixth connecting lines is set to 25 degrees, 30 degrees, or 35 degrees. In a preferred embodiment, since the emission angle of the second red LED 231 and the second blue LED 232 is a solid angle of 120 degrees, the angle between the fifth and sixth connecting lines is set to 30 degrees, so that the second red LED 231 and the second blue LED 232 are arranged at 30-degree intervals, so that the red and blue light emitted by the second red LED 231 and the second blue LED 232 on the lamp cover 1 is more uniform and has a better warning effect.

[0041] Furthermore, the light guide structure 121 can be configured with thirty-six, forty-eight, or sixty components, and the number of light guide structures 121 can be designed according to actual usage. Of course, the ratio of the number of light guide structures 121 to the number of the second red LED 231 and the second blue LED 232 is 3:1. Preferably, there are thirty-six light guide structures 121. The connection line between one light guide structure 121 and the center of the lamp cover 1 is the first connection line, and the connection lines between adjacent light guide structures 121 and the center of the lamp cover 1 are the second connection lines. The first connection line and the second connection line are set at an angle of 8 to 12 degrees, and the light guide structures 121 are arranged with a distance of 16 mm to 20 mm between them. In some embodiments, the angle between the first connection line and the second connection line is 8, 9, 10, 11, or 12 degrees, and the light guide structures 121 are arranged with a distance of 16 mm, 17 mm, 18 mm, 19 mm, or 20 mm between them. In a preferred embodiment, the first line and the second line are set at a 10-degree angle, and the light guide structures 121 are arranged at a distance of 18 mm apart, so that the light beam emitted by the light source assembly 2 can be emitted at all angles through the light guide structure 121.

[0042] In some other embodiments, the light guide structure 121 forms a first projection relative to the orthographic projection of the light source plate 21, with at least a portion of the second annular structure located at the center of the first projection. Specifically, the center of at least a portion of the light guide structure 121 is aligned with the center of each of the second red LEDs 231 and the second blue LEDs 232 to improve the beam emission effect of each of the second red LEDs 231 and the second blue LEDs 232.

[0043] In one embodiment, such as Figure 2 , Figure 4 and Figure 6As shown, the distance between each of the first red LED 221, each of the first blue LED 222, each of the second red LED 231, and each of the second blue LED 232 and the top wall 11 is no more than 50mm. Specifically, limited by the light transmission efficiency requirements of the lampshade 1, the distance between each of the first red LED 221, each of the first blue LED 222, each of the second red LED 231, and each of the second blue LED 232 and the top wall 11 is 50mm, and the distance between each of the second red LED 231 and each of the second blue LED 232 and the light guide structure 121 is 12mm. At this time, the efficiency of the light guide structure 121 in collecting the light from each of the second red LED 231 and each of the second blue LED 232 is Cos(arctan12 / 50) / 2 = 0.48, that is, 0.48 is the light collection efficiency of the light guide structure 121. The light collection efficiency is the proportion of the light beam emitted by the light source component 2 that can illuminate the light guide structure 121. Light transmittance is determined by the material and is the ratio of the number of light beams emitted through the material to the total light beam. To ensure that the light transmittance of the lampshade 1 reaches more than 80%, optical simulation using LIGHTTOOLS software shows that the distance between each of the first red LED 221, each of the first blue LED 222, each of the second red LED 231, and each of the second blue LED 232 and the top wall 11 does not exceed 50mm.

[0044] In one embodiment, such as Figure 2 and 5 As shown, in a fog-free environment at night, the warning light meets the requirement of a 300-meter visibility distance. In complete darkness or a completely dark environment, the minimum light stimulus value that the human eye can perceive is called the absolute visual threshold of the human eye. When expressed as the minimum illuminance value incident on the pupil of the human eye, the absolute visual threshold of the human eye is within 10... -9 Order of magnitude. Under a given background brightness L B Under certain conditions, the minimum illuminance E that the human eye can observe. min Approximately:

[0045]

[0046] Among them, the background brightness L at night is generally B The value is between 0.0007 and 0.003, and the maximum value L is taken. B =0.003, therefore, the minimum illuminance E that the human eye can observe is... min Approximately 1.917 × 10 -6 lux. Since light attenuates with distance as it travels through air, the degree of attenuation can be expressed by the formula: T = e -βL Where T is the light energy transmittance, β is the extinction coefficient (approximately 0.0409 in the general atmosphere), and L is the distance the light travels (in km).

[0047] Therefore, the light transmittance at 300 meters can be calculated as T = e -0.0409×0.05 Since the value of e is 2.7183, T≈0.98.

[0048] Based on the above derivation, the minimum peak luminous intensity that the luminaire needs to achieve is:

[0049] 1.917×10 -6 *300*300 / 0.98=0.18cd.

[0050] That is, as long as the peak luminous intensity detected by the warning light is greater than 0.18 cd, it can be determined that the distance of 300 meters is visible. When the lampshade 1 is made of ordinary PC material, the light transmittance is about 80%. Therefore, the required luminous intensity value of the light source component 2 under no light distribution conditions is:

[0051] 0.18 ÷ 0.80 = 0.225cd.

[0052] When the driving current of each first red LED 221, each first blue LED 222, each second red LED 231, and each second blue LED 232 is 60mA, the power is approximately 0.2W, and the luminous flux is approximately 25lm. Assuming the transmittance of the lampshade 1 is 80%, with a light source power of 0.2W, the intensity distribution of the warning light is as follows: Figure 5 As shown, the curves for red and blue light partially overlap, and the maximum illuminance at 1m is 9lx. According to the formula:

[0053] Luminous intensity (cd) = Illuminance (lx) × Distance squared (m) 2 )

[0054] The maximum light intensity at this point is 9 cd. Since the luminous intensity is independent of distance and only depends on the emission angle, the luminous intensity at 300 meters can be calculated as follows:

[0055] 9cd×T=9cd×0.98=8.82cd.

[0056] With a value greater than the minimum requirement of 0.18 cd, it can meet the optical requirements for 300-meter visibility in fog-free nighttime environments.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A light-emitting module, characterized in that, Includes: a light source assembly and a lampshade, wherein the light source assembly is disposed inside the lampshade and is used to emit a light beam, the lampshade includes a top wall and a side wall extending from the edge of the top wall in a direction away from the top wall, the side wall forming a light guide structure for guiding the light beam to be emitted from the side wall; Multiple light guide structures are provided and are distributed circumferentially at intervals on the sidewall; The surface of the light guide structure is textured. The light guide structure extends along the extension direction of the sidewall, and the extension direction of the sidewall is set at an angle of 1 to 2 degrees relative to the axial direction of the lampshade.

2. The light-emitting module according to claim 1, characterized in that: The light source assembly includes a light source plate, an inner light source, and an outer light source. The light source plate is disposed opposite to the top wall. The inner light source is disposed on the light source plate and is located near the center of the light source plate. The outer light source is arranged in a ring around the inner light source and is located near the side wall of the lampshade.

3. The light-emitting module according to claim 2, characterized in that: The inner light source includes a first red LED and a first blue LED. Multiple first red LEDs and multiple first blue LEDs are provided and are arranged in a first ring shape with intervals between them. The outer light source includes a second red LED and a second blue LED. Multiple second red LEDs and second blue LEDs are provided and are arranged at intervals to form a second ring. The second ring is located outside the first ring.

4. The light-emitting module according to claim 3, characterized in that: The light guide structure forms a first projection relative to the orthographic projection of the light source plate, and at least a portion of the second annular structure is located at the center of the first projection.

5. The light-emitting module according to claim 3, characterized in that: The line connecting the first red LED to the center of the light source board is the third line, and the line connecting the adjacent first blue LED to the center of the light source board is the fourth line. The third line and the fourth line are set at an angle of 85 degrees to 95 degrees. The line connecting one of the second red LEDs to the center of the light source board is the fifth line, and the line connecting the adjacent second blue LED to the center of the light source board is the sixth line. The fifth line and the sixth line are set at an angle of 25 to 35 degrees.

6. The light-emitting module according to claim 5, characterized in that: Each of the first red LED, each of the first blue LED, each of the second red LED, and each of the second blue LED is no more than 50 mm away from the top wall.

7. A warning light, characterized in that: The warning light includes the light-emitting module as described in any one of claims 1-6.

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