COB light source plate structure

Abstract

The utility model discloses a COB light source plate structure, which comprises an aluminum substrate, one surface of the aluminum substrate is provided with a power supply bonding pad and LED chips, the power supply bonding pad comprises a common electrode bonding pad and a plurality of independent electrode bonding pads, the plurality of LED chips form a plurality of light source branches, the head end of each light source branch is electrically connected with the common electrode bonding pad, and the head end of each light source branch is electrically connected with the independent electrode bonding pad. The tail ends of the light source branches are electrically connected with the independent electrode bonding pads in a one-to-one correspondence mode. According to the technical scheme, a plurality of power supply bonding pads and a plurality of LED chips are arranged on one surface of an aluminum substrate, all the LED chips are intensively arranged in a circular area, and the circular area is sequentially divided into a plurality of annular areas and a middle area from outside to inside; meanwhile, the number of the light source branches in each annular area is kept consistent with the number of the light source branches in the middle area, when the focal length of the lamp needs to be changed, the LED chips in the annular areas and the middle area are selectively made to emit light, the matched circuit structure is simple, complex lamp structure assistance is not needed, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of LED lighting, and more specifically, to a COB light source board structure. Background Art

[0002] In the current lighting market, LED lighting fixtures have gradually replaced energy-saving lamps. LED lamps are divided into multiple categories according to their specific uses, and among them, applying LED light sources to lamps with adjustable focal lengths is also one category. The focusing principle of common LED lamps with adjustable focal lengths is achieved by changing the refractive index of the lamp lens or the distance between the lens and the light source, resulting in the structure of this type of LED lamp being too complex, and in actual applications, users need to perform a series of operations to adjust the focal length of the LED lamp, and the operation is too cumbersome. Summary of the Utility Model

[0003] To solve the above technical problems, the purpose of the utility model is to provide a COB light source board structure.

[0004] The technical solution adopted by the utility model to solve the problem is as follows:

[0005] A COB light source board structure includes an aluminum substrate. On one side of the aluminum substrate, there are multiple power pads and multiple LED chips. The power pads include a common electrode pad and multiple independent electrode pads. The multiple LED chips form multiple light source branches, and the number of LED chips in each light source branch is the same. The number of light source branches is the same as the number of independent electrode pads. The head end of each light source branch is electrically connected to the common electrode pad, and the tail end of each light source branch is electrically connected to each independent electrode pad in one-to-one correspondence;

[0006] Each of the LED chips is concentrated in a circular area, and the circular area is sequentially divided into multiple annular areas and a central area from the outside to the inside;

[0007] The number of light source branches in each of the annular areas is the same as the number of light source branches in the central area.

[0008] As a further improvement of the above technical solution, there are two annular areas. The annular area arranged on the outside is defined as the first annular area, and the annular area arranged on the inside is defined as the second annular area.

[0009] As a further improvement of the above technical solution, each of the LED chips arranged in the same annular area is distributed in an equally spaced circular pattern.

[0010] As a further improvement of the above technical solution, the light source branches are divided into two categories, which are respectively defined as the first light source branch and the second light source branch. The light output color temperature of the first light source branch is different from that of the second light source branch. At least one of the first light source branches is provided in each of the annular regions and the central region, and at least one of the second light source branches is provided in each of the annular regions and the central region. The number of the first light source branches in each annular region is the same as that of the second light source branches, and the number of the first light source branches in the central region is the same as that of the second light source branches. The number of the first light source branches in the central region is the same as that of the second light source branches. In the annular region, the LED chips of the first light source branch and the LED chips of the second light source branch are arranged at intervals.

[0011] In another implementation means of the present technical solution, the light source branches are divided into two categories, which are respectively defined as the first light source branch and the second light source branch. The light output color temperature of the first light source branch is different from that of the second light source branch. The number of the annular regions is set to be even, and the first light source branch and the second light source branch are respectively arranged in two adjacent annular regions.

[0012] As a further improvement of the above technical solution, the LED chip is a flip-chip type chip, the length of the LED chip is 1100um, and the width of the LED chip is 1100um.

[0013] As a further improvement of the above technical solution, the placement directions of all the LED chips are the same.

[0014] The beneficial effects of the present utility model are as follows: In the present technical solution, a plurality of power pads and a plurality of LED chips are provided on one side of the aluminum substrate, and all the LED chips are concentrated in a circular area. The circular area is sequentially divided into a plurality of annular regions and a central region from the outside to the inside. At the same time, the number of the light source branches in each annular region is kept the same as that in the central region. When it is necessary to change the focal length of the lamp, the LED chips in the annular region and the central region can be selectively made to emit light. The supporting circuit structure is simple, without the assistance of a complex lamp structure, and the operation is convenient. Description of the Drawings

[0015] The following further explains and illustrates the present utility model in conjunction with the description of the drawings and the specific embodiments.

[0016] Figure 1 It is a schematic structural diagram of the COB light source in the present utility model (the first example);

[0017] Figure 2 It is a schematic structural diagram of the COB light source in the present utility model (the second example). Detailed implementation manners

[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The function of the accompanying drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0019] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present utility model.

[0020] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more. Understanding of greater than, less than, exceeding, etc. does not include the present number, and understanding of above, below, within, etc. includes the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0021] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0022] Referring to Figure 1 , this application discloses a COB light source board structure. In its first embodiment, it includes an aluminum substrate 100. One side of the aluminum substrate 100 is provided with a plurality of power pads and a plurality of LED chips 200. The power pads include a common electrode pad 310 and a plurality of independent electrode pads 320. The plurality of LED chips 200 form a plurality of light source branches. The number of LED chips 200 in each light source branch is the same. The number of light source branches is the same as the number of independent electrode pads 320. The head end of each light source branch is electrically connected to the common electrode pad 310, and the tail end of each light source branch is electrically connected to each independent electrode pad 320 in one-to-one correspondence;

[0023] Each of the LED chips 200 is centrally arranged within a circular area 400. The circular area 400 is sequentially divided into a plurality of annular areas 410 and a central area 420 from the outside to the inside;

[0024] The number of the light source branches in each of the annular regions 410 is the same as that of the light source branches in the middle region 420.

[0025] Specifically, in this embodiment, a plurality of the power pads and a plurality of the LED chips 200 are disposed on one side of the aluminum substrate 100. All the LED chips 200 are intensively disposed within the circular region 400. The circular region 400 is sequentially divided into a plurality of the annular regions 410 and the middle region 420 from outside to inside. Meanwhile, the number of the light source branches in each of the annular regions 410 is kept the same as that of the light source branches in the middle region 420. When it is necessary to change the focal length of the lamp, the LED chips 200 in the annular regions 410 and the middle region 420 are selectively made to emit light. The supporting circuit structure is simple, without the assistance of a complicated lamp structure, and the operation is convenient.

[0026] Further as a preferred implementation manner, in this embodiment, there are two annular regions 410. The annular region 410 disposed on the outside is defined as the first annular region, and the annular region 410 disposed on the inside is defined as the second annular region. Only two annular regions 410 are configured in this embodiment, which is convenient for circuit wiring and simplifies the wiring difficulty.

[0027] Further as a preferred implementation manner, in this embodiment, the LED chips 200 disposed in the same annular region 410 are distributed in an equally spaced annular manner.

[0028] Refer to Figure 2 , further as a preferred implementation manner, in this embodiment, the light source branches are divided into two types, which are respectively defined as the first light source branch and the second light source branch. The light-emitting color temperature of the first light source branch is different from that of the second light source branch. At least one first light source branch is disposed in each of the annular regions 410 and the middle region 420, and at least one second light source branch is disposed in each of the annular regions 410 and the middle region 420. The number of the first light source branches in each of the annular regions 410 is the same as that of the second light source branches. The number of the first light source branches in the middle region 420 is the same as that of the second light source branches. In the annular regions 410, the LED chips 200 of the first light source branch and the LED chips 200 of the second light source branch are arranged at intervals.

[0029] Further as a preferred implementation manner, in this embodiment, the LED chip 200 is a flip-chip, the length of the LED chip 200 is 1100um, and the width of the LED chip 200 is 1100um.

[0030] Further as a preferred embodiment, in this embodiment, the placement directions of all the LED chips 200 are the same. This setting facilitates the placement by relevant automated equipment

[0031] In the second embodiment of the COB light source board structure of the present application, compared with the first embodiment, the difference is that in this embodiment, the light source branches are divided into two categories, which are respectively defined as the first light source branch and the second light source branch. The light-emitting color temperature of the first light source branch is different from that of the second light source branch. The number of the annular regions 410 is set to be an even number, and the first light source branch and the second light source branch are respectively arranged in two adjacent annular regions 410.

[0032] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A COB light source board structure, characterized in that: It includes an aluminum substrate (100). On one side of the aluminum substrate (100), there are provided a plurality of power pads and a plurality of LED chips (200). The power pads include a common electrode pad (310) and a plurality of independent electrode pads (320). The plurality of LED chips (200) form a plurality of light source branches. The number of LED chips (200) in each light source branch is the same. The number of light source branches is the same as the number of independent electrode pads (320). The head end of each light source branch is electrically connected to the common electrode pad (310), and the tail end of each light source branch is electrically connected to each independent electrode pad (320) in a one-to-one correspondence; Each of the LED chips (200) is centrally arranged within a circular area (400). The circular area (400) is sequentially divided from the outside to the inside into a plurality of annular zones (410) and a central zone (420); The number of light source branches within each of the annular zones (410) is the same as that within the central zone (420).

2. The structure of a COB light source board according to claim 1, wherein: There are two annular zones (410). The annular zone (410) arranged on the outside is defined as the first annular zone, and the annular zone arranged on the inside is defined as the second annular zone.

3. The structure of a COB light source board according to claim 1, wherein: Each of the LED chips (200) arranged within the same annular zone (410) is distributed in an equally spaced circular pattern.

4. A COB light source board structure according to claim 3, characterized in that: The light source branches are divided into two types, which are respectively defined as the first light source branch and the second light source branch. The light output color temperature of the first light source branch is different from that of the second light source branch. At least one first light source branch is provided within each of the annular zones (410) and the central zone (420). At least one second light source branch is provided within each of the annular zones (410) and the central zone (420). The number of the first light source branches within each annular zone (410) is the same as the number of the second light source branches. The number of the first light source branches within the central zone (420) is the same as the number of the second light source branches. The number of the first light source branches within the central zone (420) is the same as the number of the second light source branches. Within the annular zone (410), the LED chips (200) of the first light source branch and the LED chips (200) of the second light source branch are arranged in an alternating pattern.

5. A COB light source board structure according to claim 3, characterized in that: The light source branches are divided into two types, which are respectively defined as the first light source branch and the second light source branch. The light output color temperature of the first light source branch is different from that of the second light source branch. The number of the annular zones (410) is set to be an even number. The first light source branch and the second light source branch are respectively provided in two adjacent annular zones (410).

6. A COB light source board structure according to claim 1, characterized in that: Each of the LED chips (200) is a flip-chip type chip. The length of each LED chip (200) is 1100um, and the width of the LED chip (200) is 1100um.

7. A COB light source board structure according to claim 1, characterized in that: The placement directions of each of the LED chips (200) are the same.

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