A built-in patch type double-color COB changing along a color temperature black body curve

Abstract

The utility model relates to COB light source technical field, specifically disclose a built-in patch type bicolor COB along the color temperature black body curve change, including substrate, be provided with positive pad, warm light chip group, cold light chip group and negative pad on the substrate, warm light chip group and cold light chip group all respectively with positive pad and negative pad electric connection, be provided with luminous area on the substrate, warm light chip group and cold light chip group all are located in the luminous area, still be provided with a plurality of series connection's green light chip and constant current device in the luminous area, green light chip and constant current device are connected with positive pad and negative pad respectively. The utility model discloses through with constant current device and green light chip distribution setting in the luminous area, can realize the value of color temperature coordinate along the color temperature black body curve change, can save the space occupied again, and the whole structure is relatively simple, and wiring is more reasonable, convenient to make to improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of COB light source technology, and in particular to a built-in patch-type dual-color COB that varies along the color temperature blackbody curve. Background Technology

[0002] COB (Chip on Board) refers to chip-on-board packaging. COB light sources typically include a substrate, on which are provided light-emitting areas, cold light positive electrode pads, cold light negative electrode pads, warm light positive electrode pads, warm light negative electrode pads, and conductive lines. COB light sources are widely used due to their long lifespan, lack of pollution, and high luminous efficiency.

[0003] Current dimming LED devices require a five-channel scheme to achieve two color temperature variations and adjust the color coordinates along the blackbody curve. The five channels are a red light channel, a green light channel, a blue light channel, and two white light channels. The functions of red, green, and blue light are as follows: green light is added when the color coordinate value needs to be increased; red light is added when the color coordinate value is too high and needs to be decreased; and blue light is used to control the color temperature.

[0004] A search revealed that Chinese utility model patent CN202222809968.1 discloses a dimming LED device, including a substrate, a first light-emitting channel, and a second light-emitting channel. The first light-emitting channel includes a first pad, a first resistor, a first LED chip, and a second LED chip; the first LED chip is connected in series with the first resistor. The second light-emitting channel includes a second pad, a second resistor, a third LED chip, and a fourth LED chip; the third LED chip is connected in series with the second resistor. The color temperature of the light corresponding to the first, second, and fourth LED chips increases sequentially, with the color temperature of the light corresponding to the third LED chip being no less than that of the second LED chip and less than that of the fourth LED chip. The driving current corresponding to the first LED chip is less than that of the second LED chip, and the driving current corresponding to the third LED chip is less than that of the fourth LED chip. By using two light-emitting channels, the color coordinate value can be adjusted along a blackbody curve, reducing manufacturing costs and broadening the application range.

[0005] While the existing dimming LED devices can meet basic usage requirements, their voltage divider resistors are located outside the light-emitting area, occupying a large space. Furthermore, their structure is relatively complex, the wiring is not reasonable, they are inconvenient to manufacture, and their production efficiency is low. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a built-in patch dual-color COB that varies along the color temperature blackbody curve, in view of the above-mentioned defects of the prior art. By distributing the constant current device and green light chip in the light-emitting area, the color temperature coordinate value can be varied along the color temperature blackbody curve, while saving space. Moreover, the overall structure is relatively simple, the wiring is more reasonable, and the manufacturing is convenient, thereby improving production efficiency.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0008] A built-in surface-mount dual-color COB with a color temperature varying along a blackbody curve includes a substrate. The substrate has a positive pad, a warm-light chip group, a cold-light chip group, and a negative pad. The warm-light chip group and the cold-light chip group are electrically connected to the positive and negative pads, respectively. The substrate has a light-emitting area, where the warm-light chip group and the cold-light chip group are located. The light-emitting area also has several series-connected constant-current resistors or constant-current IC chips, which are connected to the positive and negative pads, respectively.

[0009] Preferably, the positive electrode pad includes a warm light positive electrode pad and a cold light positive electrode pad, the negative electrode pad includes a warm light negative electrode pad and a cold light negative electrode pad, the warm light chip group is connected to the warm light positive electrode pad and the warm light negative electrode pad respectively, and the cold light chip group is connected to the cold light positive electrode pad and the cold light negative electrode pad respectively.

[0010] Preferably, the constant current device is connected to the positive electrode pad and the green light chip respectively, and the green light chip is connected to the negative electrode pad.

[0011] Preferably, the green light chip is connected to the positive electrode pad and the constant current device respectively, and the constant current device is connected to the negative electrode pad.

[0012] Preferably, the warm light chip group includes a plurality of warm light chips connected in series, and the cold light chip group includes a plurality of cold light chips connected in series.

[0013] Preferably, the constant current device and the green light chip are both distributed between the warm light chip and the cold light chip.

[0014] By adopting the above technical solution, the present invention provides a built-in surface-mount dual-color COB that varies along the color temperature blackbody curve, which has the following beneficial effects: the warm light chip group and the cold light chip group in the built-in surface-mount dual-color COB are electrically connected to the positive electrode pad and the negative electrode pad, respectively. A light-emitting area is provided on the substrate, and the warm light chip group and the cold light chip group are located in the light-emitting area. Several constant current devices and green light chips connected in series are also provided in the light-emitting area. The constant current devices and green light chips are connected to the positive electrode pad and the negative electrode pad, respectively. By distributing the constant current devices and green light chips in the light-emitting area, a constant current effect is achieved. When adjusting the color temperature, the color temperature coordinate value can also vary along the color temperature blackbody curve, saving space. Moreover, the overall structure is relatively simple, the wiring is more reasonable, and the manufacturing is more convenient, thereby greatly improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] In the figure, 1-substrate, 2-warm light chip group, 3-cold light chip group, 4-light emission area, 5-constant current device, 6-green light chip, 7-warm light positive electrode pad, 8-cold light positive electrode pad, 9-warm light negative electrode pad, 10-cold light negative electrode pad. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] like Figure 1 As shown, the built-in surface-mount dual-color COB with a color temperature varying along the blackbody curve includes a substrate 1. The substrate 1 has a positive pad, a warm light chip group 2, a cold light chip group 3, and a negative pad. The warm light chip group 2 and the cold light chip group 3 are electrically connected to the positive and negative pads, respectively. The substrate 1 has a light-emitting region 4, within which the warm light chip group 2 and the cold light chip group 3 are located. Several constant current devices 5 and green light chips 6, connected in series, are also disposed within the light-emitting region 4. The constant current devices 5 and the green light chips 6 are connected to the positive and negative pads, respectively. It is understood that the substrate 1 can be a general-purpose aluminum substrate, and the constant current devices can be general-purpose constant current resistors or constant current diodes, etc. The constant current devices 5 and the green light chips 6 are mounted on the substrate 1 using a surface-mount method.

[0021] Specifically, the positive electrode pad includes a warm-light positive electrode pad 7 and a cold-light positive electrode pad 8, and the negative electrode pad includes a warm-light negative electrode pad 9 and a cold-light negative electrode pad 10. The warm-light chip group 2 is connected to the warm-light positive electrode pad 7 and the warm-light negative electrode pad 9, respectively, and the cold-light chip group 4 is connected to the cold-light positive electrode pad 8 and the cold-light negative electrode pad 10, respectively. The warm-light chip group 2 includes a plurality of warm-light chips connected in series, and the cold-light chip group 3 includes a plurality of cold-light chips connected in series. The constant current device 5 and the green light chip 6 are distributed between the warm-light chips and the cold-light chips. It is understood that the present invention does not limit the number of warm-light chips and cold-light chips.

[0022] Understandably, in Embodiment 1, the green light chip 6 is distributed among the constant current devices 5, and the constant current devices 5 are respectively connected to the warm light positive electrode pad 7 (or cold light positive electrode pad 8) and the green light chip 6, and the green light chip 6 is connected to the warm light negative electrode pad 9 (or cold light negative electrode pad 10).

[0023] Understandably, in Embodiment 2, the constant current device 5 is distributed among the green light chips 6, and the green light chips 6 are respectively connected to the warm light positive electrode pad 7 (cold light positive electrode pad 8) and the constant current device 5, and the constant current device 5 is connected to the warm light negative electrode pad 9 (or cold light negative electrode pad 10).

[0024] Understandably, this utility model has a reasonable design and unique structure. By distributing the constant current device 5 and the green light chip 6 within the light-emitting area 4, a constant current effect is achieved. When adjusting the color temperature, the color temperature coordinate value can change along the color temperature blackbody curve. It also saves space, and the overall structure is relatively simple, with more reasonable wiring and easier manufacturing, thereby greatly improving production efficiency.

[0025] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A built-in surface-mount dual-color COB with a color temperature varying along a blackbody curve, comprising a substrate, wherein a positive electrode pad, a warm light chip group, a cold light chip group, and a negative electrode pad are disposed on the substrate, wherein the warm light chip group and the cold light chip group are electrically connected to the positive electrode pad and the negative electrode pad, respectively, and a light-emitting area is disposed on the substrate, wherein the warm light chip group and the cold light chip group are both located within the light-emitting area, characterized in that: The light-emitting area is also provided with a number of green light chips and constant current devices connected in series, and the green light chips or constant current devices are respectively connected to the positive electrode pad and the negative electrode pad; The warm light chip group includes several warm light chips connected in series, the cold light chip group includes several cold light chips connected in series, and the constant current device and the green light chip are distributed between the warm light chips and the cold light chips.

2. The built-in patch-type dual-color COB that varies along the color temperature blackbody curve according to claim 1, characterized in that: The positive electrode pad includes a warm light positive electrode pad and a cold light positive electrode pad, and the negative electrode pad includes a warm light negative electrode pad and a cold light negative electrode pad. The warm light chip group is connected to the warm light positive electrode pad and the warm light negative electrode pad respectively, and the cold light chip group is connected to the cold light positive electrode pad and the cold light negative electrode pad respectively.

3. The built-in patch-type dual-color COB that varies along the color temperature blackbody curve according to claim 1, characterized in that: The constant current device is connected to the positive electrode pad and the green light chip respectively, and the green light chip is connected to the negative electrode pad.

4. The built-in patch-type dual-color COB that varies along the color temperature blackbody curve according to claim 1, characterized in that: The green light chip is connected to the positive electrode pad and the constant current device, respectively, and the constant current device is connected to the negative electrode pad.

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