LED Light Distribution Structure, Light Source Module and Lighting Fixture

Abstract

Embodiments of the present application disclose an LED light distribution structure, a light source module, and a lamp. The LED light distribution structure includes an annular light distribution element and multiple LED chips; the annular light distribution element has an annular light source cavity, the light source cavity has a center of the ring and a center line that is annularly arranged around the center of the ring; the multiple LED chips are annularly arranged in the light source cavity, the LED chip includes an LED and a chip substrate, and the LED is arranged on the chip substrate; the LEDs on all the LED chips are uniformly arranged along an annular arrangement line, the annular arrangement line and the center line are concentric ring arrangements, and the annular arrangement line is inside or outside the center line. The light source module includes a light source board and the LED light distribution structure; the LED chips are arranged on the light source board, and the annular light distribution element is covered on the light source board. The lamp includes a lamp body and at least one light source module, and the light source module is arranged on the lamp body. The LED light distribution structure, the light source module, and the lamp provided by the embodiments of the present application can greatly simplify the structure.

Description

Technical Field

[0001] This application relates to the technical field of inductor manufacturing, and particularly to an LED light distribution structure, a light source module, and a lighting fixture. Background Art

[0002] A lighting fixture is an indispensable lighting device in people's lives. With the development of society, the functions of lighting fixtures have gradually evolved from single indoor lighting to more functions such as decoration and rendering, continuously enriching people's living environments.

[0003] With the progress of technology, the light-emitting elements of modern lighting fixtures have gradually moved away from filaments and incandescent lamps, and LEDs (light-emitting diodes) are generally used as light-emitting elements. To facilitate the assembly of lighting fixture manufacturers, LED manufacturers usually set one or several LEDs on a small chip substrate to form an LED chip. Lighting fixture manufacturers only need to attach the LED chip to the light source board of the lighting fixture to connect the LED to the circuit.

[0004] Since the LED emits light in a spherical shape and the light-emitting angle is fixed, the lighting effect is single. To make the lighting fixture present the required lighting effects such as lighting angle and light concentration, related technologies usually externally assemble a light distribution element to the LED for light distribution. Early light distribution elements were usually single light distribution elements, that is, each LED or LED chip had an independent rotary light distribution element, and the LED chip was located in the center of the rotary light distribution element to make the light spot circular. When adjusting the light-emitting angle, there are usually two methods. One method is to directly change the light distribution configuration of the light distribution element, which is extremely costly. To save costs and adjust the light-emitting angle without changing the light distribution element, it can be achieved by changing the distance (Z-axis distance) between the LED chip and the light distribution element.

[0005] Later, a ring-shaped light distribution element was gradually developed. Through one light distribution element, multiple annularly arranged LED chips can be uniformly light-distributed at the same time, and a circular light spot can also be formed. Considering that each LED chip can be uniformly light-distributed by the ring-shaped light distribution element, the LED chips are usually arranged at the midline position of the light source cavity of the ring-shaped light distribution element. For this ring-shaped light distribution element, when adjusting the light-emitting angle without changing the light distribution configuration of the light distribution element, the above method of changing the distance (Z-axis distance) between the LED chip and the light distribution element is generally also used.

[0006] However, although the above method of adjusting the angle does not require changing the light distribution configuration of the light distribution element, it needs to add a structural member between the light source board and the light distribution element to achieve the adjustment of the Z-axis distance, and the structure is still relatively complex. Summary of the Invention

[0007] Embodiments of the present application provide an LED light distribution structure, a light source module, and a lighting fixture to solve the above problems.

[0008] Embodiments of the present application adopt the following technical solutions:

[0009] In a first aspect, embodiments of the present application provide an LED light distribution structure, including an annular light distribution element and multiple LED chips;

[0010] The annular light distribution element has an annular light source cavity, the light source cavity has a center of the ring and a center line that annularly surrounds the center of the ring;

[0011] Multiple LED chips are annularly arranged in the light source cavity. The LED chips include LEDs and chip substrates, and the LEDs are arranged on the chip substrates;

[0012] All the LEDs on all the LED chips are uniformly arranged along an annular arrangement line, the annular arrangement line and the center line are arranged as concentric rings, and the annular arrangement line is inside or outside the center line.

[0013] Optionally, in the above LED light distribution structure, the chip substrate has a center, and the LED is at the center or not at the center.

[0014] Optionally, in the above LED light distribution structure, the LED is not at the center, and the center of the chip substrate is on the center line.

[0015] Optionally, in the above LED light distribution structure, the center of the chip substrate is inside or outside the center line.

[0016] Optionally, in the above LED light distribution structure, the chip substrate has a horizontal axis and a vertical axis that pass through the center and are perpendicular to each other. The horizontal axis and the vertical axis divide the chip substrate into four quadrants, and at least most of the LEDs are in one of the quadrants.

[0017] Optionally, in the above LED light distribution structure, neither the horizontal axis nor the vertical axis is perpendicular to the line connecting the center of the ring to the center.

[0018] Optionally, in the above LED light distribution structure, all the LED chips have the same attitude relative to the center of the ring in the circumferential direction.

[0019] Optionally, in the above LED light distribution structure, the LED chip includes multiple LEDs, and multiple LEDs are all arranged on the chip substrate.

[0020] Optionally, in the above LED light distribution structure, the annular light distribution element is an annular refractive lens or an annular total reflection lens.

[0021] In a second aspect, an embodiment of the present application provides a light source module, including a light source board and the LED light distribution structure as described above;

[0022] The LED chips are arranged on the light source board, and the annular light distribution element is sleeved on the light source board.

[0023] In a third aspect, an embodiment of the present application provides a lighting fixture, including a lamp body and at least one of the light source modules as described above, and the light source module is arranged on the lamp body.

[0024] The above at least one technical solution adopted in the embodiment of the present application can achieve the following beneficial effects:

[0025] The LED light distribution structure, the light source module and the lighting fixture provided by the embodiment of the present application can adjust the light-emitting angle while maintaining a circular light spot by changing the position of the LED relative to the center line of the light source cavity. This way of adjusting the light-emitting angle does not require adding structural components between the light source board and the light distribution element, so the structure can be greatly simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0027] Figure 1 It is a top view assembly view of the LED light distribution structure provided by the embodiment of the present application, where the center d is on the center line b and the LED chips are rotated around the center d so that the annular wiring lines c1, c2 are located outside the center line b;

[0028] Figure 2 It is a top view assembly view of the LED light distribution structure provided by the embodiment of the present application, where the center d is on the center line b and the annular wiring line c is located outside the center line b;

[0029] Figure 3 is Figure 2 a cross-sectional view;

[0030] Figure 4 is Figure 2 a light distribution curve graph of the LED light distribution structure provided;

[0031] Figure 5 It is a top view assembly view of the LED light distribution structure provided by the embodiment of the present application, where both the center d and the annular wiring line c are located inside the center line b;

[0032] Figure 6 is Figure 5 a cross-sectional view;

[0033] Figure 7 For Figure 5 the light distribution curve diagram of the provided LED light distribution structure;

[0034] Figure 8 the top-down assembly view of the LED light distribution structure provided by the embodiment of the present application, where the center d and the annular wiring c are both located outside the center line b;

[0035] Figure 9 For Figure 8 the cross-sectional view;

[0036] Figure 10 For Figure 8 the light distribution curve diagram of the provided LED light distribution structure;

[0037] Figure 11 the top-down assembly view of the LED light distribution structure provided by the embodiment of the present application, where the center d is on the center line b and the annular wiring c is located inside the center line b;

[0038] Figure 12 For Figure 11 the cross-sectional view;

[0039] Figure 13 For Figure 11 the light distribution curve diagram of the provided LED light distribution structure;

[0040] Figure 14 the view of the LED chip structure provided by the embodiment of the present application, which includes multiple LEDs;

[0041] Figure 15 Two postures of the LED chip provided by the embodiment of the present application.

[0042] Explanation of reference numerals:

[0043] 1 - annular light distribution element, 10 - light source cavity, 12 - light distribution part, 120 - light incident surface, 122 - light exit surface, 124 - total reflection surface, 2 - LED chip, 20 - LED, 22 - chip substrate;

[0044] a - center of the ring, b - center line, c - annular wiring, d - center, e - horizontal axis, f - vertical axis. Detailed implementation manners

[0045] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0046] The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0047] An embodiment of the present application discloses an LED light distribution structure, as Figures 1 to 15 shown, which includes an annular light distribution element 1 and multiple LED chips 2. The annular light distribution element 1 has an annular light source cavity 10, and the light source cavity 10 has a center a and a median line b that annularly surrounds the center. The annular light distribution element 1 also has a light distribution part 12, and the light distribution part 12 is arranged around the light source cavity 10. The interface between the light distribution part 12 and the light source cavity 10 is the incident light surface 120 of the light distribution part 12. After the light enters the interior of the light distribution part 12 from the incident light surface 120, the light path can be adjusted by means of refraction or reflection, etc., and finally exits from the light exit surface 122 that is substantially opposite to the incident light surface 120. Usually, the radial cross-section of the light source cavity 10 and the light distribution part 12 is an axisymmetric structure, and the axis is perpendicular to and intersects the median line b. The annular light distribution element in this embodiment can be an annular refractive lens or an annular total reflection lens. The main difference between these two lenses lies in the different structures of the light distribution part 12. The light distribution part 12 of the annular refractive lens performs light distribution through the principle of light refraction of a concave lens or a convex lens, while the light distribution part 12 of the annular total reflection lens also has a total reflection surface 124 on the basis of refraction, so a light distribution effect different from that of the annular refractive lens can be presented.

[0048] Multiple LED chips 2 are annularly arranged in the light source cavity 10. The LED chip 2 includes an LED 20 and a chip substrate 22, and the LED 20 is arranged on the chip substrate 22. The LEDs 20 on all the LED chips 2 are uniformly arranged along an annular arrangement line c, and the annular arrangement line c and the median line b are concentric rings. According to different required light exit angles, the annular arrangement line c may be inside the median line b (see Figure 2 , 3 , 5, 6, 11, 12), or may be outside the median line b (see Figure 1 , 7 , 8). When it is necessary to increase the light exit angle, the annular arrangement line c will be inside the median line b. At this time, the light distribution part 12 will produce a polarization effect on the light of the LED 20, and the light emitted by the LED 20 will be more emitted by the light distribution part 12 to the side away from the center a. Therefore, the overall LED light distribution structure can have a larger light exit angle. On the contrary, when it is necessary to reduce the light exit angle, the annular arrangement line c will be outside the median line b. At this time, the light emitted by the LED 20 will be more emitted by the light distribution part 12 to the side towards the center a. Therefore, the overall LED light distribution structure can have a smaller light exit angle.

[0049] Moreover, although for a single LED 20, it will be in the situation of uneven light distribution after the above adjustment, since all the LEDs 20 are on the same annular wiring line c, the uneven light distribution effects of each LED 20 can be kept consistent. For the overall light-emitting effect of all the LEDs 20, it is still possible to ensure that the overall light spot is circular.

[0050] For the light source module implementing the above LED light distribution structure, the LED chips 2 of the above LED light distribution structure can be directly arranged on a light source board (not shown in the figure), and the annular light distribution element 1 can be covered on the light source board, so as to achieve the corresponding light distribution effect. No additional structural components need to be added in the module structure. Therefore, compared with the adjustment structures in the related art, the LED light distribution structure provided in this embodiment can simplify the structure of the light source module more.

[0051] In production practice, the chip substrate 22 usually has a center d, which can refer to the geometric center of the chip substrate 22. When the chip substrate 22 is circular, square or other approximate shapes, it has a geometric center. In addition, this center can also refer to various forms of centers such as the size center and the perpendicular center of the chip substrate. This center d is usually set at the midline b position of the light source cavity 10 in the related art.

[0052] In this embodiment, according to the different models of the LED chips 2, the LEDs 20 may be at the above center d or may not be at the above center d. For different structures of the LED chips 2, different structural forms can be adopted.

[0053] Such as Figure 1 、 2 、3, 11, 12 show that when the LED 20 is not at the center d of the chip substrate 22, the center d of the chip substrate 22 can be at the midline b. At this time, the LED 20 will be in an eccentric position. Rotating the LED chip 2 with the center d as the axis, the LED 20 will rotate around the center d, so as to realize the adjustment of the position where the LED 20 is located. At this time, as long as all the LEDs are controlled to be on the same annular wiring line c, the adjustment of the light-emitting angle can be realized. Refer to Figure 4 and Figure 13 , taking the QINGZHI 60° floodlight as an example, the LED selects OSRAM3030. By rotating the LED chip 2 with the center d as the axis, the beam angle can be adjusted within the range of 60° ( Figure 4 ) to 86° ( Figure 13 ).

[0054] When the LED 20 is at the center d of the chip substrate 22, the position of the entire LED chip 2 can be directly adjusted so that the center d of the chip substrate 22 is inside or outside the center line b, while keeping the original posture of the LED chip 2 unchanged, and the adjustment of the position where the LED 20 is located can still be achieved. Moreover, this adjustment method can also be applied to the case where the LED 20 is not at the center d of the chip substrate 22 (see Figures 2 to 10 ). See Figure 4 , 7 and Figure 10 . Similarly, taking the Qingzhi 60° floodlight as an example, when the LEDs 20 on the LED chip 2 are all in the posture on the side of the chip substrate 22 away from the center d, by adjusting the position of the LED chip 2, the beam angle can be adjusted within the range of 54° ( Figure 10 ) to 70° ( Figure 7 ).

[0055] Through the above two adjustment methods, the adjustment of the beam angle within the range of 54° to 86° can be achieved. In some other embodiments, the above two adjustment methods can also be applied simultaneously to the LED chips 2 where the LEDs 20 are not at the center d of the chip substrate 22, that is, on the one hand, changing the position of the center of the chip substrate 22 so that it is inside or outside the center line b, and on the other hand, also rotating the LED chip 2 around the center d to further change the position where the LED 20 is located. In this way, a larger angle adjustment range can be expected to be obtained.

[0056] To cooperate with the position adjustment or rotation of the LED chip 2, it is usually necessary to correspondingly adjust the pads on the light source board corresponding to the LED chip 2 and adjust their positions or postures to be consistent with the LED chip 2. In some cases, due to the circuit layout limitations on the light source board, it may not be possible to adjust the pads on the light source board by using a single adjustment method, while the solution of applying two adjustment methods simultaneously gives the light source board more wiring options, which is beneficial to the reasonable wiring of the light source board and reduces the wiring and light source board processing difficulty.

[0057] For the adjustment method of rotating the LED chip 2 around the center d, due to the difference in the rotation direction, in most cases, the LED 20 can rotate clockwise until it is on the annular row wiring c, or rotate counterclockwise until it is on the annular row wiring c, thus forming two different postures (see Figure 15)。Although the distance of the LED 20 from the center a of the ring or the center line b is the same in these two postures, due to the positional difference in the circumferential direction of the ring, the position of the light spot formed by the LED 20 will also have a certain offset. These offsets may cause uneven brightness distribution of the overall light spot. Therefore, in order to make the brightness distribution of the light spot more uniform, it is preferred in this embodiment that the postures of all the LED chips 2 with respect to the center a of the ring in the circumferential direction are kept consistent. In this way, while changing the position of the LED 20 with respect to the center a of the ring or the center line b, all the LED 20 can move the same distance in the same direction along the circumference, ensuring that their intervals do not change, thereby ensuring uniform brightness distribution.

[0058] For the adjustment method of this embodiment, it is more applicable to the LED chip 2 of the following structure. As Figure 14 shown, the chip substrate 22 of the LED chip 2 has a horizontal axis e and a vertical axis f that pass through the center d and are perpendicular to each other. The horizontal axis e and the vertical axis f divide the chip substrate 22 into four quadrants. The number of LEDs 20 contained in the LED chip 2 can be only one, or multiple LEDs can be contained at the same time. Regardless of which scheme, for the LED 20 as a whole, at least most of the LEDs 20 are in one of the quadrants, and a small part of the LEDs 20 may be in adjacent or even opposite other quadrants. This LED chip 2 can be based on the horizontal axis e and the vertical axis f, which is more conducive to technicians to adjust the position of the LED 20. As Figure 1 shown, in some embodiments, according to needs, neither the horizontal axis e nor the vertical axis f is perpendicular to the connection line from the center a to the center d of the ring, but at a certain angle (see Figure 1 ).

[0059] When the LED chip 2 contains multiple LEDs 20, these LEDs 20 can be on the same annular wiring c, but more likely, the LEDs 20 in the same position are on the same annular wiring c, and the LEDs 20 in different positions are located on different annular wiring c, thereby forming multiple annular wiring c1, c2.

[0060] The light source module provided by this embodiment can be arranged on the lamp body when arranged inside the lamp. And, according to different light effect requirements, multiple light source modules can be arranged in a planar array form or a concentric annular form in the same lamp at the same time. The light source plates of these light source modules can be independent of each other or integrated into a whole.

[0061] In summary, the LED light distribution structure, light source module and lamp provided by the embodiments of the present application can greatly simplify the structure.

[0062] In the above embodiments of the present application, the differences between the various embodiments are mainly described. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity of the text, it will not be elaborated here.

[0063] The above are only the embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. An LED light distribution structure, characterized in that, it includes an annular light distribution element and multiple LED chips; the annular light distribution element has an annular light source cavity, the light source cavity has a center of the ring and a center line that annularly surrounds the center of the ring; multiple of the LED chips are annularly arranged in the light source cavity, the LED chips include LEDs and chip substrates, and the LEDs are arranged on the chip substrates; the LEDs on all the LED chips are uniformly arranged along an annular wiring line, the annular wiring line and the center line are arranged in concentric rings, and the annular wiring line is inside or outside the center line; the chip substrate has a center, the LED is not at the center of the chip substrate, and by rotating the LED chip around the center of the chip substrate as an axis, the light output angle of the LED light distribution structure is adjusted.

2. The LED light distribution structure according to claim 1, characterized in that, the center of the chip substrate is on the center line.

3. The LED light distribution structure according to claim 1, characterized in that, the center of the chip substrate is inside or outside the center line.

4. The LED light distribution structure according to claim 2 or 3, characterized in that, the chip substrate has a horizontal axis and a vertical axis that pass through the center and are perpendicular to each other, the horizontal axis and the vertical axis divide the chip substrate into four quadrants, and at least most of the LEDs are in one of the quadrants.

5. The LED light distribution structure according to claim 4, characterized in that, neither the horizontal axis nor the vertical axis is perpendicular to the connection line from the center of the ring to the center.

6. The LED light distribution structure according to any one of claims 1 to 3, characterized in that, all the LED chips have the same attitude relative to the center of the ring in the circumferential direction.

7. The LED light distribution structure according to any one of claims 1 to 3, characterized in that, the LED chip includes multiple LEDs, and multiple of the LEDs are all arranged on the chip substrate.

8. The LED light distribution structure according to any one of claims 1 to 3, characterized in that, the annular light distribution element is an annular refractive lens or an annular total reflection lens.

9. A light source module, characterized in that, it includes a light source board and the LED light distribution structure according to any one of claims 1 to 8; the LED chips are arranged on the light source board, and the annular light distribution element covers the light source board.

10. A lighting fixture, characterized in that, it includes a lamp body and at least one light source module according to claim 9, and the light source module is arranged on the lamp body.

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