LED light source and LED display device

Abstract

The utility model discloses an LED light source and an LED display device, an LED light source module comprises a support and a light transmitting cover, at least three light reflecting cavities are arranged in the support at intervals, and light emitting chips are arranged in the light reflecting cavities; the light-transmitting cover covers the support, at least three convex lenses are arranged on the light-transmitting cover, the convex lenses and the light-emitting chips are arranged in a one-to-one correspondence mode, and light emitted by the light-emitting chips is emitted outwards through the corresponding convex lenses; the centroid position of the convex lens in the vertical direction is lower than the centroid position of the light-emitting chip, and the section curve part of the convex lens in the vertical direction comprises an upper abrupt slope curve part and a lower gentle slope curve part. According to the utility model, upward light emission can be reduced, the visual range of downward light emission can be enlarged, the actual light demand of a user can be met, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of LED devices, in particular to an LED light source and an LED display device. Background Art

[0002] The LED light source in the current LED display device includes a bracket, a lens and light-emitting chips of different colors. The light-emitting chips are fixed on the bracket, and each light-emitting chip emits light outward through a corresponding lens. However, for outdoor LED display devices, which are at a relatively high position, the upward light is hardly received by the target users, resulting in an increase in useless light-emitting energy loss and even causing light pollution, affecting the living environment of surrounding residents. To this end, a black baffle is provided in the LED light source structure to block the upward light, but it will also increase the useless light-emitting energy loss, and the overall structure is relatively complex and the cost is high. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an LED light source and an LED display device with simple structure and low cost, which can reduce the upward light output and increase the visible range of the downward light output to meet the actual light use requirements of users.

[0004] To solve the above technical problem, the utility model provides an LED light source, which includes a bracket and a light-transmitting cover. At least three reflecting cavities are arranged at intervals in the bracket, and light-emitting chips are arranged in the reflecting cavities; the light-transmitting cover is covered on the bracket, and at least three convex lenses are arranged on the light-transmitting cover. The convex lenses are arranged in one-to-one correspondence with the light-emitting chips, and the light emitted by the light-emitting chips is emitted outward through the corresponding convex lenses; the centroid position of the convex lens in the vertical direction is lower than the centroid position of the light-emitting chip, and the cross-sectional curve part of the convex lens in the vertical direction includes an upper steep slope curve part and a lower gentle slope curve part.

[0005] As an improvement of the above solution, the reflecting cavity is an upper and lower asymmetric structure, and the upward light output angle of the reflecting cavity is smaller than the downward light output angle of the reflecting cavity.

[0006] As an improvement of the above solution, the bracket includes a frame plate body and a frame body arranged on the frame plate body. Pins are arranged on the frame plate body; the reflecting cavity is arranged inside one end of the frame body far away from the frame plate body, and the conductive part of the light-emitting chip passes through the frame body and is electrically connected to the corresponding pin.

[0007] As an improvement of the above solution, the number of the arranged reflecting cavities and the number of the arranged convex lenses are both three, and the convex lenses cover the light output ports of the reflecting cavities.

[0008] As an improvement of the above solution, the emission colors of the light-emitting chips are the same or at least one is different. Among them, the emission combinations of the three light-emitting chips are RGB combination, or RRB combination, or RRR combination, or RRG combination, or GGB combination, or GGG combination, or RBB combination, or BBB combination, or GBB combination.

[0009] As an improvement of the above solution, the centroid of the convex lens in the horizontal direction is on the same axis as the centroid of the light-emitting chip, and the cross-sectional curve part of the convex lens in the horizontal direction includes two horizontally curved parts that are axially symmetric.

[0010] As an improvement of the above solution, the convex lens is circular, elliptical or square.

[0011] As an improvement of the above solution, the convex lens is an integral part made of glass or plastic material, and the shapes and sizes of multiple convex lenses are the same or at least one is different.

[0012] As an improvement of the above solution, the reflective cavity, the light-emitting chip and the convex lens are arranged in a straight line, or in a triangular arrangement, or in a similar triangular arrangement.

[0013] The present invention also provides an LED display device, including an LED display and the above-mentioned LED light source, and the LED light source is arranged in the LED display.

[0014] The beneficial effects of implementing the present invention are as follows:

[0015] In the present invention, the centroid position of the convex lens in the vertical direction is lower than the centroid position of the light-emitting chip to increase the downward light-emitting angle and improve the downward light-emitting rate. At the same time, the convex lens in the vertical direction is provided with an asymmetric upper steep slope curve part and a lower gentle slope curve part. The convex lens with the upper steep slope curve part can make most of the light emitted by the light-emitting chip be refracted and emitted horizontally or downward, and the convex lens with the lower gentle slope curve part can make the light emitted by the light-emitting chip be refracted and emitted horizontally or downward, so as to reduce the useless upward light-emitting amount and increase the useful light-emitting amount, thereby further reducing the upward light-emitting rate and increasing the downward light-emitting rate and the light-emitting visible range, greatly reducing the useless luminous energy loss, improving the light efficiency, meeting the actual light-using needs of users, and without the need to use an additional black baffle, and the overall structure is simple and the cost is low. Description of the Drawings

[0016] Figure 1 is a three-dimensional structural schematic diagram of the LED light source of the present invention;

[0017] Figure 2 is a front view structural schematic diagram of the LED light source of the present invention;

[0018] Figure 3 It is a schematic cross-sectional structure diagram of the LED light source of the present utility model in the vertical direction;

[0019] Figure 4 It is a schematic cross-sectional structure diagram of the LED light source of the present utility model in the horizontal direction. Specific embodiments

[0020] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] As Figures 1 to 4 shown, a specific embodiment of the present utility model provides an LED light source, including a bracket 1 and a light-transmitting cover 2. At least three reflecting cavities 3 are provided at intervals inside the bracket 1, and a light-emitting chip 4 is provided inside the reflecting cavity 3; the light-transmitting cover 2 is covered on the bracket 1, and at least three convex lenses 5 are provided on the light-transmitting cover 2. The convex lenses 5 are arranged in one-to-one correspondence with the light-emitting chips 4, and the light emitted by the light-emitting chips 4 is emitted outward through the corresponding convex lenses 5. The inner wall surface of the reflecting cavity 3 is made of a reflecting material, and the first light distribution is completed for the light-emitting chip 4 through the reflection of the reflecting cavity 3; each light-emitting chip 4 corresponds to a convex lens 5, and the light emitted by the light-emitting chip 4 is mixed after the second light distribution is completed through the corresponding convex lens 5, realizing the function of light mixing.

[0022] Among them, the convex lens 5 is provided with an upper steep slope curve portion 51 and a lower gentle slope curve portion 52 in the vertical direction, and the two are asymmetric structures; among them, the radius of curvature of the upper steep slope curve portion 51 is smaller than that of the lower gentle slope curve portion 52. Correspondingly, the upper steep slope curve portion 51 is steeper, while the lower gentle slope curve portion 52 is gentler, that is, the upper half of the convex lens 5 in the vertical direction has a steeper structure, while the lower half has a gentler structure. It should be added that, in this embodiment, as Figure 1 shown, the A direction is the vertical direction, and the B direction is the horizontal direction.

[0023] The centroid position of the convex lens 5 provided in the vertical direction is lower than the centroid position of the light-emitting chip 4 to increase the downward light-emitting angle and improve the downward light-emitting rate; the convex lens 5 with the upper steep slope curve portion 51 can make most of the light emitted by the light-emitting chip 4 be refracted and emitted horizontally or downward, and the convex lens 5 with the lower gentle slope curve portion 52 can make the light emitted by the light-emitting chip 4 be refracted and emitted horizontally or downward, so as to reduce the useless upward light-emitting amount and increase the useful light-emitting amount, thereby further reducing the light-emitting rate of the upward light and increasing the light-emitting rate of the downward light and the visible range of the downward light, greatly reducing the useless light-emitting energy loss, improving the light efficiency, meeting the actual light-using needs of users, and without the need to use an additional black baffle, the overall structure is simple and the cost is low.

[0024] Furthermore, the reflective cavity 3 has an asymmetrical structure in the up-and-down direction. The upward light-emitting angle of the reflective cavity 3 is smaller than the downward light-emitting angle of the reflective cavity 3, so as to reduce the luminous rate of the upward light and increase the luminous rate of the downward light. As a result, more light is emitted downward through the convex lens 5, improving the downward light-emitting range, reducing the upward light-emitting rate and range, thereby reducing the loss of useless luminous energy, improving the light efficiency, and meeting the actual light-using needs of users. Among them, the inner wall surface of the reflective cavity 3 is made of a reflective material. Preferably, the specific values of the upward light-emitting angle and the downward light-emitting angle of the reflective cavity 3 can be set according to the actual product use requirements, and no excessive restrictions are imposed here.

[0025] Furthermore, as Figure 4 shown, the centroid of the convex lens 5 in the horizontal direction is on the same axis as the centroid of the light-emitting chip 4. The cross-sectional curve part of the convex lens 5 in the horizontal direction includes two horizontally curved parts 53 that are axially symmetric, so as to ensure that the left and right viewable angles in the horizontal direction are the same. The present utility model only adjusts the viewable angle range in the vertical direction to reduce the upward light and increase the downward light, improving the useful viewable angle range and meeting the actual light-using needs of users.

[0026] Preferably, the bracket 1 includes a frame plate body 6 and a frame body 7 provided on the frame plate body 6. The frame plate body 6 is provided with pins 8; the reflective cavity 3 is provided inside one end of the frame body 7 away from the frame plate body 6. The conductive part of the light-emitting chip 4 passes through the frame body 7 and is electrically connected to the corresponding pin 8, and is connected to an external power supply terminal through the pin 8 to enable the light-emitting chip 4 to be powered on and work.

[0027] Preferably, the number of the reflective cavities 3 and the number of the convex lenses 5 are both three. The convex lenses 5 cover the light-emitting ports of the reflective cavities 3, so that the light emitted from the light-emitting cavity is all emitted through the convex lenses 5, improving the light-emitting effect and the downward light-emitting rate. The light-emitting colors of the light-emitting chips 4 are the same or at least one is different. Among them, the light-emitting combinations of the three light-emitting chips 4 are RGB combination or RRB combination or RRR combination or RRG combination or GGB combination or GGG combination or RBB combination or BBB combination or GBB combination, which is specifically determined according to actual needs. Among them, for the convex lenses 5 corresponding to different light-emitting chips 4, the steepness of the upper steep slope curve part 51 and the flatness of the lower gentle slope curve part 52 in the vertical direction are all different or any one is different or all the same. For example, the steepness of the upper steep slope curve part 51 and the flatness of the lower gentle slope curve part 52 of the GB light-emitting chip 4 are the same, while the steepness of the upper steep slope curve part 51 of the R light-emitting chip 4 is higher than that of the G or B light-emitting chip 4, and the flatness of the lower gentle slope curve part 52 of the R light-emitting chip 4 is lower than that of the G or B light-emitting chip 4, that is, the lower gentle slope curve part 52 of the R light-emitting chip 4 is steeper.

[0028] Preferably, the convex lens 5 is preferably circular, oval or square, but not limited thereto, and can be specifically adjusted according to actual requirements.

[0029] Preferably, the convex lens 5 is an integral part made of glass or plastic, and the light-transmitting cover 2 is made of the same material as the convex lens 5. The shapes and sizes of the plurality of convex lenses 5 are the same or at least one is different, and can be actually adjusted according to the light-emitting chips 4 of the adopted light-emitting combination.

[0030] Preferably, the reflecting cavity 3, the light-emitting chip 4 and the convex lens 5 are all arranged in a straight line, in a triangular arrangement or in a quasi-triangular arrangement to be applicable to LED light source products arranged in a straight line, in a triangular arrangement or in a quasi-triangular arrangement, with a wide range of applicable orientations. It should be added that the present utility model can also be applicable to other LED light source products with different arrangements.

[0031] The present utility model also provides an LED display device, including an LED display and the above-mentioned LED light source, and the LED light source is arranged in the LED display. Since the above-mentioned LED light source has the above-mentioned technical effects, the LED display device including the above-mentioned LED light source should also have the above-mentioned technical effects, which will not be repeated here one by one. Among them, the LED display device is preferably an LED traffic information board or an outdoor LED display screen, but not limited thereto, and can also be other LED display products using the above-mentioned LED light source.

[0032] In summary, the centroid position of the convex lens 5 provided by the present utility model in the vertical direction is lower than the centroid position of the light-emitting chip 4 to increase the downward light-emitting angle and improve the downward light-emitting rate; at the same time, the convex lens 5 is provided with an asymmetric upper steep slope curve portion 51 and a lower gentle slope curve portion 52 in the vertical direction. The convex lens 5 with the upper steep slope curve portion 51 can make most of the light emitted by the light-emitting chip 4 be refracted and emitted horizontally or downward, and the convex lens 5 with the lower gentle slope curve portion 52 can make the light emitted by the light-emitting chip 4 be refracted and emitted horizontally or downward to reduce the useless upward light-emitting amount and increase the useful light-emitting amount, thereby further reducing the upward light-emitting rate and increasing the downward light-emitting rate and the light-emitting visible range, greatly reducing the useless light-emitting energy loss, improving the light efficiency, meeting the actual light-using requirements of users, and without using an additional black baffle, with a simple overall structure and low cost.

[0033] Furthermore, the upward light-emitting angle of the reflective cavity 3 provided in the present utility model is smaller than the downward light-emitting angle of the reflective cavity 3, so as to reduce the luminous rate of the upward light and increase the luminous rate of the downward light, so that more light is emitted downward through the convex lens 5, improve the downward light-emitting range, reduce the upward light-emitting rate and range, and further reduce the loss of useless luminous energy, improve the light efficiency, and meet the actual light-using needs of users; moreover, the centroid of the convex lens 5 in the horizontal direction is on the same axis as the centroid of the light-emitting chip 4, and the cross-sectional curve part of the convex lens 5 in the horizontal direction includes two axially symmetric horizontal curve parts 53 to ensure that the left and right viewing angles in the horizontal direction are the same. The present utility model only adjusts the viewing angle range in the vertical direction to reduce the upward light, increase the downward light, improve the useful viewing angle range, and meet the actual light-using needs of users.

[0034] The above is the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and retouches can be made, and these improvements and retouches are also regarded as the protection scope of the present utility model.

Claims

1. An LED light source, characterized in that: It comprises a bracket and a light-transmitting cover, wherein at least three reflective cavities are arranged in the bracket at intervals, and a light-emitting chip is arranged in the reflective cavity; The light-transmitting cover is arranged on the bracket, and at least three convex lenses are arranged on the light-transmitting cover. The convex lenses are arranged one by one corresponding to the light-emitting chips, and the light emitted by the light-emitting chips is emitted outward through the corresponding convex lenses; The centroid position of the convex lens in the vertical direction is lower than the centroid position of the light emitting chip, and the cross-sectional curve portion of the convex lens in the vertical direction includes an upper steep slope curve portion and a lower gentle slope curve portion.

2. The LED light source according to claim 1, characterized in that: The reflective cavity is an asymmetric structure in the upper and lower parts, and the upward light emitting angle of the reflective cavity is smaller than the downward light emitting angle of the reflective cavity.

3. The LED light source according to claim 1, characterized in that: The bracket comprises a frame body and a frame body arranged on the frame body, and the frame body is provided with pins; The reflective cavity is arranged in one end of the frame body away from the frame plate body, and the conductive part of the light-emitting chip passes through the frame body and is electrically connected to the corresponding pin.

4. The LED light source according to claim 1, characterized in that: The number of the reflective cavity and the number of the convex lenses are both three, and the convex lenses cover the light outlets of the reflective cavity.

5. The LED light source according to claim 4, characterized in that: The luminous colors of the light-emitting chips are all the same or at least one is different, wherein the luminous combination of the three light-emitting chips is an RGB combination, an RRB combination, an RRR combination, an RRG combination, a GGB combination, a GGG combination, an RBB combination, a BBB combination, or a GBB combination.

6. The LED light source according to any one of claims 1 to 5, characterized in that: The centroid of the convex lens in the horizontal direction is on the same axis as the centroid of the light-emitting chip, and the cross-sectional curve portion of the convex lens in the horizontal direction includes two axially symmetrical horizontal curve portions.

7. The LED light source according to any one of claims 1 to 5, characterized in that: The convex lens is circular, oval or square.

8. The LED light source according to any one of claims 1 to 5, characterized in that: The convex lens is an integral piece made of glass or plastic material, and the shapes and sizes of the plurality of convex lenses are the same or at least one of them is different.

9. The LED light source according to any one of claims 1 to 5, characterized in that: The reflective cavity, the light emitting chip and the convex lens are arranged in a straight line or in a triangle shape.

10. An LED display device, characterized in that: The invention comprises an LED display and an LED light source as claimed in any one of claims 1 to 9, wherein the LED light source is arranged in the LED display.

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