Multi-color-temperature COB light source

Abstract

The utility model discloses a multi-color-temperature COB light source which comprises a substrate and a light-emitting module, the light-emitting module comprises a high-color-temperature light-emitting area, a middle-color-temperature light-emitting area and a low-color-temperature light-emitting area, the high-color-temperature light-emitting area, the middle-color-temperature light-emitting area and the low-color-temperature light-emitting area are arranged in a central circular area of the substrate, the low-color-temperature light-emitting area is located on a bisector of the central circular area, the high color temperature light-emitting area and the medium color temperature light-emitting area are sequentially arranged outside the two sides of the low color temperature light-emitting area, and the low color temperature light-emitting area and the medium color temperature light-emitting area are spaced by a certain distance; the substrate is provided with a positive electrode end and three negative electrode ends, one ends of the high, middle and low color temperature light-emitting areas are connected in parallel and are connected with the positive electrode end, and the other ends of the high, middle and low color temperature light-emitting areas are respectively connected with the three negative electrode ends. The low-color-temperature light-emitting area is located on the bisector of the central circular area, and when the low-color-temperature light-emitting area is lighted independently, the candlelight effect can be achieved by combining light-dark adjustment; the high-color-temperature light-emitting areas are distributed on the two sides, and a wider illumination area can be obtained.

Description

Technical Field

[0001] This utility model relates to a COB light source, and more particularly to a multi-color temperature COB light source. Background Technology

[0002] Chinese Patent Publication No. CN 112201651A, published on January 8, 2021, discloses a multi-color temperature COB light source, relating to the field of LED light source manufacturing technology. The light source includes a mirror substrate with a mirror area and an electrode line area. The electrode line area has high color temperature positive and negative electrode lines, intermediate color temperature positive and negative electrode lines, and low color temperature positive and negative electrode lines. The mirror area has A units, each containing 12m LED chips, all fixed to the mirror area. Each unit is filled with phosphor adhesive, with adjacent units using phosphor adhesives of different color temperatures, including high color temperature, intermediate color temperature, and low color temperature phosphor adhesives. The LED chips in each unit are connected by bonding wires to form LED chip groups. The positive and negative electrodes of the LED chip groups in different color temperature units are connected to the corresponding color temperature positive and negative electrode lines. A dam is provided outside the mirror area. The high color temperature region of this structure is located at the center line of the mirror area (light-emitting area) of the COB light source. Therefore, when high color temperature light is emitted alone, the area is small and the brightness is low. On the other hand, the low color temperature region is located on both sides of the mirror area of ​​the COB light source and has a larger area. Therefore, when low color temperature light is emitted alone, it is not possible to minimize the illuminated area. In addition, since the positive and negative lines of each color temperature region are independent, the wiring is inconvenient, and the starting positive voltage is the same. When all color temperature regions are connected to the same starting voltage, all of them will light up. It is not possible to light up different color temperature regions by changing the voltage. Utility Model Content

[0003] The purpose of this invention is to provide a multi-color temperature COB light source with a reasonable structure, convenient wiring, and low color temperature that can be driven independently by a lower voltage.

[0004] The purpose of this utility model is achieved as follows:

[0005] A multi-color-temperature COB light source includes a substrate and a light-emitting module. The light-emitting module includes a high color-temperature light-emitting area, a medium color-temperature light-emitting area, and a low color-temperature light-emitting area. The high color-temperature light-emitting area, the medium color-temperature light-emitting area, and the low color-temperature light-emitting area are disposed in the central circular area of ​​the substrate. The low color-temperature light-emitting area is located on the bisector of the central circular area. The high color-temperature light-emitting area and the medium color-temperature light-emitting area are arranged sequentially on both sides of the low color-temperature light-emitting area, and the low color-temperature light-emitting area and the medium color-temperature light-emitting area are separated by a certain distance. The substrate has one positive terminal and three negative terminals. One end of the high color-temperature light-emitting area, the medium color-temperature light-emitting area, and the low color-temperature light-emitting area are connected in parallel and connected to the positive terminal. The other end of the high color-temperature light-emitting area, the medium color-temperature light-emitting area, and the low color-temperature light-emitting area are respectively connected to the three negative terminals.

[0006] The objective of this utility model can also be achieved by the following technical measures:

[0007] As a more specific embodiment, the forward voltage of the low color temperature emitting region is lower than that of the medium color temperature emitting region and the high color temperature emitting region.

[0008] As a further embodiment, the forward voltages of the high color temperature emitting region, the medium color temperature emitting region, and the low color temperature emitting region are 36V, 36V, and 30V, respectively.

[0009] As a further embodiment, the operating color temperatures of the high color temperature emitting region, the medium color temperature emitting region, and the low color temperature emitting region are 5000K, 2700K, and 1800K-2000K, respectively.

[0010] As a further embodiment, a transparent sealing layer is provided outside the light-emitting module, the adjacent sides of the high color temperature light-emitting area and the medium color temperature light-emitting area are close to each other, and the transparent sealing layer also fills the spacer area between the low color temperature light-emitting area and the medium color temperature light-emitting area.

[0011] As a further embodiment, the positive electrode and the three negative electrodes are evenly distributed around the center of the light-emitting module.

[0012] As a further embodiment, the high color temperature light-emitting area, the medium color temperature light-emitting area, and the low color temperature light-emitting area each include multiple LED chips connected in series and / or in parallel, and a phosphor coating. The phosphor coating covers the corresponding LED chips in the high color temperature light-emitting area, the medium color temperature light-emitting area, and the low color temperature light-emitting area; the area of ​​the high color temperature light-emitting area, the medium color temperature light-emitting area, and the low color temperature light-emitting area decreases sequentially.

[0013] As a further embodiment, the substrate is provided with an LED chip connection circuit, and the positive terminal and three negative terminals are electrically connected to the connection circuit.

[0014] As a further embodiment, the substrate is square with a side length of 15mm-20mm and a thickness of 1mm-2mm, and the diameter of the light-emitting module is 12mm-15mm.

[0015] As a further embodiment, the forward currents of the high color temperature emitting region, the medium color temperature emitting region, and the low color temperature emitting region are 300VmA-400mA, 300VmA-400mA, and 150mA-200mA, respectively.

[0016] The beneficial effects of this utility model are as follows:

[0017] (1) The low color temperature light-emitting area of ​​this utility model is located on the bisector of the central circular area. When the low color temperature light-emitting area is lit alone, it can achieve a candlelight effect when combined with light and dark adjustment. The high color temperature light-emitting area is distributed on both sides, which can obtain a wider lighting area.

[0018] (2) The low color temperature light-emitting area of ​​this utility model is separated from the light-emitting areas on both sides, so as to avoid the phosphor coating on its surface from mixing with the phosphor coating of other light-emitting areas on both sides, and the color temperature is more stable and reliable.

[0019] (3) The ends of each color temperature of this utility model are connected in parallel, reducing the number of connection points and making wiring more convenient.

[0020] (4) The starting positive voltage of the low color temperature light-emitting area of ​​this utility model is lower than that of other color temperature light-emitting areas. When used with a dimmer, the low color temperature light-emitting area can be lit from the lowest brightness. Then the low color temperature brightness gradually increases. When it reaches the starting positive voltage of other color temperature light-emitting areas, it is mixed with other color temperatures to obtain other color temperatures. Attached Figure Description

[0021] Figure 1 This is a top view of one embodiment of the present invention.

[0022] Figure 2 This is a side view of the structure of this utility model.

[0023] Figure 3 for Figure 1 A schematic diagram of the AA cross-sectional structure.

[0024] Figure 4 This is a three-dimensional structural diagram of the present invention.

[0025] Figure 5 This is a schematic diagram of another embodiment of the present invention.

[0026] Figure 6 This is the circuit schematic diagram of this utility model. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0028] See Figures 1 to 6As shown, a multi-color temperature COB light source includes a substrate 1 and a light-emitting module 2. The light-emitting module 2 includes a high color temperature light-emitting area 23, a medium color temperature light-emitting area 22, and a low color temperature light-emitting area 21. The high color temperature light-emitting area 23, the medium color temperature light-emitting area 22, and the low color temperature light-emitting area 21 are disposed in the central circular area of ​​the substrate 1. The low color temperature light-emitting area 21 is located on the bisector of the central circular area. The high color temperature light-emitting area 23 and the medium color temperature light-emitting area 22 are sequentially disposed on both sides of the low color temperature light-emitting area 21, and the low color temperature light-emitting area 21 and the medium color temperature light-emitting area 22 are separated by a certain distance. The substrate 1 has a positive terminal 11 and three negative terminals. One end of the high color temperature light-emitting area 23, the medium color temperature light-emitting area 22, and the low color temperature light-emitting area 21 is connected in parallel and connected to the positive terminal 11. The other end of the high color temperature light-emitting area 23, the medium color temperature light-emitting area 22, and the low color temperature light-emitting area 21 is connected to the three negative terminals respectively.

[0029] The forward voltage of the low color temperature emitting region 21 is lower than that of the medium color temperature emitting region 22 and the high color temperature emitting region 23.

[0030] The forward voltages of the high color temperature emitting region 23, the medium color temperature emitting region 22, and the low color temperature emitting region 21 are 36V, 36V, and 30V, respectively.

[0031] The operating color temperatures of the high color temperature emitting area 23, the medium color temperature emitting area 22, and the low color temperature emitting area 21 are 5000K, 2700K, and 1800K, respectively.

[0032] The light-emitting module 2 is also provided with a transparent sealing layer 24. The adjacent sides of the high color temperature light-emitting area 23 and the medium color temperature light-emitting area 22 are close to each other. The transparent sealing layer 24 also fills the space between the low color temperature light-emitting area 21 and the medium color temperature light-emitting area 22.

[0033] The positive terminal 11 and the three negative terminals are evenly distributed around the center of the light-emitting module 2.

[0034] The high color temperature light-emitting area 23, the medium color temperature light-emitting area 22, and the low color temperature light-emitting area 21 each include multiple LED chips connected in series and / or in parallel, and a phosphor coating. The phosphor coating covers the corresponding LED chips in the high color temperature light-emitting area 23, the medium color temperature light-emitting area 22, and the low color temperature light-emitting area 21. The areas of the high color temperature light-emitting area 23, the medium color temperature light-emitting area 22, and the low color temperature light-emitting area 21 decrease sequentially.

[0035] The substrate 1 is provided with an LED chip connection circuit, and the positive terminal 11 and the three negative terminals are electrically connected to the connection circuit.

[0036] The substrate 1 is square with a side length of 15mm-20mm and a thickness of 1mm-2mm, and the light-emitting module 2 has a diameter of 12mm-15mm.

[0037] The forward currents of the high color temperature light-emitting region 23, the medium color temperature light-emitting region 22, and the low color temperature light-emitting region 21 are 300VmA-400mA, 300VmA-400mA, and 150mA-200mA, respectively.

[0038] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A multi-color temperature COB light source, comprising a substrate (1) and a light-emitting module (2), characterized in that: The light-emitting module (2) includes a high color temperature light-emitting area (23), a medium color temperature light-emitting area (22), and a low color temperature light-emitting area (21). The high color temperature light-emitting area (23), the medium color temperature light-emitting area (22), and the low color temperature light-emitting area (21) are arranged in the central circular area of ​​the substrate (1). The low color temperature light-emitting area (21) is located on the bisector of the central circular area. The high color temperature light-emitting area (23) and the medium color temperature light-emitting area (22) are arranged sequentially on both sides of the low color temperature light-emitting area (21). The low color temperature light-emitting area (21) and the medium color temperature light-emitting area (22) are separated by a certain distance. The substrate (1) has a positive terminal (11) and three negative terminals. One end of the high color temperature light-emitting area (23), the medium color temperature light-emitting area (22), and the low color temperature light-emitting area (21) are connected in parallel and connected to the positive terminal (11). The other end of the high color temperature light-emitting area (23), the medium color temperature light-emitting area (22), and the low color temperature light-emitting area (21) are respectively connected to the three negative terminals. The forward voltage of the low color temperature emitting region (21) is lower than that of the medium color temperature emitting region (22) and the high color temperature emitting region (23); The working color temperatures of the high color temperature emitting area (23), the medium color temperature emitting area (22), and the low color temperature emitting area (21) are 5000K, 2700K, and 1800K, respectively.

2. The multi-color temperature COB light source according to claim 1, characterized in that: The forward voltages of the high color temperature light emission region (23), the medium color temperature light emission region (22), and the low color temperature light emission region (21) are 36V, 36V, and 30V, respectively.

3. The multi-color temperature COB light source according to claim 1, characterized in that: The light-emitting module (2) is also provided with a transparent sealing layer (24). The adjacent sides of the high color temperature light-emitting area (23) and the medium color temperature light-emitting area (22) are close to each other. The transparent sealing layer (24) also fills the space between the low color temperature light-emitting area (21) and the medium color temperature light-emitting area (22).

4. The multi-color temperature COB light source according to claim 1, characterized in that: The positive electrode (11) and the three negative electrodes are evenly distributed around the center of the light-emitting module (2).

5. The multi-color temperature COB light source according to claim 1, characterized in that: The high color temperature light-emitting area (23), medium color temperature light-emitting area (22) and low color temperature light-emitting area (21) each include multiple LED chips connected in series and / or in parallel and phosphor coatings. The phosphor coatings cover the corresponding LED chips of the high color temperature light-emitting area (23), medium color temperature light-emitting area (22) and low color temperature light-emitting area (21). The areas of the high color temperature light-emitting area (23), medium color temperature light-emitting area (22) and low color temperature light-emitting area (21) decrease in sequence.

6. The multi-color temperature COB light source according to claim 5, characterized in that: The substrate (1) is provided with an LED chip connection circuit, and the positive terminal (11) and three negative terminals are electrically connected to the connection circuit.

7. The multi-color temperature COB light source according to claim 5, characterized in that: The substrate (1) is square with a side length of 15mm-20mm and a thickness of 1mm-2mm, and the light-emitting module (2) has a diameter of 12mm-15mm.

8. The multi-color temperature COB light source according to claim 5, characterized in that: The forward currents of the high color temperature light emission region (23), the medium color temperature light emission region (22), and the low color temperature light emission region (21) are 300VmA-400mA, 300VmA-400mA, and 150mA-200mA, respectively.

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