Multi-color constant-voltage COB light source and COB lamp

Abstract

The utility model discloses a kind of multicolor constant-voltage COB light source and COB lamps and lanterns, the COB light source includes substrate, device mounting area, welding area and light source area are equipped on substrate, multiple light emitting modules are equipped in light source area;At least one constant-current drive module and switch module are equipped in device mounting area, switch module is set one-to-one with light emitting module;Welding area includes power supply pad and drive pad, power supply pad is connected with the power connection pad and constant-current drive module of external drive board respectively, for constant-current drive module power supply, drive pad is set one-to-one with light emitting module;Switch module is connected with constant-current drive module and light emitting module respectively, switch module is also connected with the drive connection pad of external drive board through corresponding drive pad, for the on-off state between constant-current drive module and light emitting module according to the drive signal of external drive board control. Using the utility model can facilitate assembly wiring, reduce installation difficulty and improve installation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of COB technology, and in particular to a multicolor constant voltage COB light source and COB lamp. Background Technology

[0002] Current COB lighting fixtures generally use a constant current driver board to drive the COB light source for constant current operation. The COB light source typically shares a single positive or negative electrode. For multi-color light sources, one positive electrode and multiple negative electrodes are required. Both the positive and negative electrodes are equipped with corresponding polarity pads. These pads are connected to the constant current driver board via wires to control any one or more LED modules. However, each LED module requires a large current at its operating voltage and power (e.g., in existing five-color COB light sources, each channel has a power of 15W and an operating voltage of 36V, so each pad and wire needs to handle 420mA). This results in thicker wires connecting the pads to the constant current driver board to ensure stable current transmission. However, since COB light sources are relatively small, multiple thick wires make assembly and wiring difficult, leading to lower installation efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a multi-color constant voltage COB light source and COB lamp, which can facilitate assembly and wiring, reduce installation difficulty and improve installation efficiency.

[0004] To address the aforementioned technical problems, this utility model provides a multi-color constant-voltage COB light source, comprising a substrate. The substrate has a device mounting area, a soldering area, and a light source area. The light source area contains multiple light-emitting modules. The device mounting area contains at least one constant-current driving module and one switching module, with each switching module corresponding to one of the light-emitting modules. The soldering area includes power pads and driving pads. The power pads are connected to the power connection pads of an external driving board and the constant-current driving module, respectively, to supply power to the constant-current driving module. Each driving pad corresponds to one of the light-emitting modules. The switching module is connected to both the constant-current driving module and the light-emitting module. The switching module is also connected to the driving connection pads of the external driving board via corresponding driving pads, for controlling the on / off state between the constant-current driving module and the light-emitting module according to the driving signal from the external driving board.

[0005] As an improvement to the above solution, the external driver board is provided with a drive control circuit, which has multiple output terminals, each of which corresponds to a light-emitting module. The output terminals are connected to the switch module via the drive connection pad and the drive pad, and are used to control the working state of the switch module.

[0006] As an improvement to the above solution, the power pad includes a positive power pad and a negative power pad. One power terminal of the constant current driving module is connected to the positive power pad, and the other power terminal of the constant current driving module is connected to the negative power pad. The driving terminal of the constant current driving module is connected to the positive terminal of the multiple light-emitting modules. The two connection terminals of the switching module are respectively connected to the negative terminal of the light-emitting module and the negative power pad. The control terminal of the switching module is connected to the driving connection pad of the external driving board via the driving pad.

[0007] As an improvement to the above solution, the power pad includes a positive power pad and a negative power pad. One power terminal of the constant current driving module is connected to the negative power pad, and the other power terminal of the constant current driving module is connected to the positive power pad. The driving terminal of the constant current driving module is connected to the negative terminal of the multiple light-emitting modules. The two connection terminals of the switching module are respectively connected to the positive terminal of the light-emitting module and the positive power pad. The control terminal of the switching module is connected to the driving connection pad of the external driving board via the driving pad.

[0008] As an improvement to the above solution, the drive control circuit includes a controller, which includes a power supply pin, a ground pin, and multiple output pins. The power supply pin is connected to a power supply, and the ground pin is connected to a ground terminal. The output pins are configured to correspond one-to-one with the light-emitting modules. The output pins are connected to the ground terminal via a resistor module and to the control terminal of the switch module via the drive connection pad and the drive pad.

[0009] As an improvement to the above solution, the drive control circuit includes a controller, which includes a power supply pin, a ground pin, and multiple output pins. The power supply pin is connected to a power supply, and the ground pin is connected to a ground terminal. The output pins are configured to correspond one-to-one with the light-emitting modules. The output pins are connected to the power supply via a resistor module and to the control terminal of the switch module via the drive connection pad and the drive pad.

[0010] As an improvement to the above solution, the switching module is an NMOS transistor.

[0011] As an improvement to the above solution, the switching module is a PMOS transistor.

[0012] As an improvement to the above solution, the light-emitting module includes at least one LED light.

[0013] This utility model also discloses a COB lamp, including a lamp body and the aforementioned multicolor constant voltage COB light source, wherein the multicolor constant voltage COB light source is disposed in the lamp body.

[0014] The beneficial effects of implementing this utility model are as follows:

[0015] This invention integrates a constant current drive module and a switch module onto a COB light source, enabling the lighting control of the COB light source through a low-current drive circuit, meeting the display requirements of different colors. Furthermore, the use of thinner drive wires to achieve the control connection between the drive board and the COB light source facilitates assembly and wiring, reduces installation difficulty, and improves installation efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the multicolor constant voltage COB light source of this utility model;

[0017] Figure 2 This is a circuit diagram of the first embodiment of the COB light source driving circuit of this utility model;

[0018] Figure 3 This is a circuit diagram of the first embodiment of the drive control circuit of this utility model;

[0019] Figure 4 This is a circuit diagram of the second embodiment of the COB light source driving circuit of this utility model;

[0020] Figure 5 This is a circuit diagram of the second embodiment of the drive control circuit of this utility model. Detailed Implementation

[0021] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0022] like Figure 1 As shown in the figure, a specific embodiment of this utility model provides a structural schematic diagram of a multicolor constant voltage COB light source, including a substrate 1. The substrate 1 is provided with a device mounting area 2, a soldering area 3 and a light source area 4. The light source area 4 is located in the middle of the substrate 1, and the device mounting area 2 and the soldering area 3 are located on both sides of the light source area 4, specifically at the two side edges of the substrate 1, so as to facilitate the installation of devices and circuits.

[0023] The light source area 4 is provided with multiple light-emitting modules 41; the device mounting area 2 is provided with at least one constant current driving module 21 and a switch module 22, and the switch module 22 is configured in a one-to-one correspondence with the light-emitting module 41; the soldering area 3 includes a power pad 31 and a drive pad 32, the power pad 31 is connected to the power connection pad of the external drive board and the constant current driving module 21 respectively, and is used to supply power to the constant current driving module 21 so that the constant current drive outputs constant current power to drive the light-emitting module 41 to work at a constant current, ensuring good lighting effect.

[0024] The driving pads 32 are configured one-to-one with the light-emitting modules 41. The switch module 22 is connected to the constant current driving module 21 and the light-emitting module 41 respectively. The switch module 22 is also connected to the driving connection pad of the external driving board via the corresponding driving pad 32. It is used to control the on / off state between the constant current driving module 21 and the light-emitting module 41 according to the driving signal of the external driving board, so as to control one or more light-emitting modules 41 to work and realize the display requirements of different colors.

[0025] Furthermore, the power pads 31 and 32 on the substrate 1 can be connected to the power connection pads and drive connection pads on the external driver board via ribbon cables. To ensure stable operation of the light-emitting module 41 under the required operating voltage and power, the power pads 31 and 32 are connected using power cables capable of carrying a large current (i.e., thicker cables) to ensure stable power supply. The power pads 31 include a positive power pad and a negative power pad. The drive pads 32 and 32 are connected using thinner cables, sufficient to drive the switching module 22 with the drive level signal, ensuring stable operation of the lighting control. Using multiple thinner drive cables to connect the driver board to the COB light source facilitates assembly and wiring, reducing installation difficulty and improving efficiency. Secondly, the power pads 31 are larger than the drive pads 32 to ensure a larger current supply, thus ensuring stable operation of the COB lighting.

[0026] Preferably, in other embodiments, the power pad 31 and the drive pad 32 can also be directly soldered to the power connection pad and the drive connection pad on the external drive board, or the power pad 31 and the drive pad 32 can also be plugged into the power connection pad and the drive connection pad on the external drive board through wiring terminals, which can also realize electrical connection, thereby facilitating assembly and wiring, reducing installation difficulty and improving installation efficiency.

[0027] Specifically, the external driver board is equipped with a drive control circuit, which has multiple output terminals. Each output terminal corresponds to one of the light-emitting modules 41 to control the operation of the corresponding module. The output terminals are connected to the switch module 22 via the drive connection pad and drive pad 32 to control the operating state of the switch module 22, thereby controlling the illumination of the corresponding light-emitting module 41 and achieving different color display effects.

[0028] like Figures 2 to 3 As shown, Figures 2 to 3 The circuit diagram of the first embodiment of the COB light source of this utility model is shown. The light source driving circuit and driving control circuit of the COB light source are described in detail below with reference to this embodiment:

[0029] I. Light source driving circuit

[0030] The light source driving circuit is a common anode circuit. In this circuit, one power supply terminal of the constant current driving module 21 is connected to the positive power supply pad, and the other power supply terminal of the constant current driving module 21 is connected to the negative power supply pad. The driving terminal of the constant current driving module 21 is connected to the positive terminals of multiple light-emitting modules 41. Each constant current driving module 21 is connected to at least one light-emitting module 41 to drive the corresponding light-emitting module 41 to operate with constant current illumination. The number of constant current driving modules 21 can be adjusted according to the number of light-emitting modules 41 to ensure stable driving of all light-emitting modules 41 to operate with constant current, thus ensuring excellent COB light source illumination effect.

[0031] The two connection terminals of the switch module 22 are respectively connected to the negative terminal of the light-emitting module 41 and the negative terminal of the power supply pad. The control terminal of the switch module 22 is connected to the drive connection pad of the external drive board through the drive pad to control the on / off state between the constant current drive module 21 and the light-emitting module 41, thereby controlling one or more light-emitting modules 41 to work and realize the display requirements of different colors.

[0032] It should be noted that in this embodiment, the COB light source is equipped with five light-emitting modules 41, and correspondingly, there are five switch modules 22 and five drive pads to form a one-to-one control relationship. Furthermore, two constant current drive modules 21 are respectively connected to the corresponding number of light-emitting modules 41 to ensure the lighting driving effect of the light-emitting modules 41. The five switch modules 22 can control the lighting operation of one or more light-emitting modules 41 according to the received drive signals, achieving different color display requirements.

[0033] Preferably, the switching module 22 is an NMOS transistor, but it is not limited thereto.

[0034] Preferably, the light-emitting module 41 includes at least one LED light.

[0035] II. Drive Control Circuit

[0036] The drive control circuit includes a controller U1, a first resistor R1, a first Zener diode D1, and a first capacitor C1. The controller U1 includes a power supply pin VDD, a ground pin GND, and multiple output pins (P10, P11, P12, P14, and P15). The power supply pin VDD is connected to the power supply via the first resistor R1. The power supply pin VDD is also connected to the ground terminal via the first Zener diode D1 and the first capacitor C1. The ground pin GND is connected to the ground terminal. The output pins are configured one-to-one with the light-emitting modules 41. The output pins are connected to the ground terminal via resistor modules (R2, R3, R4, R5, and R6), and connected to the control terminal of the switch module 22 via the drive connection pad and the drive pad.

[0037] It should be noted that the controller can output corresponding drive signals through multiple output pins to control the on / off state of the corresponding switch module 22, thereby controlling the on / off state between the constant current drive module 21 and the light-emitting module 41, and thus controlling one or more light-emitting modules 41 to work to achieve different color display requirements.

[0038] like Figures 4 to 5 As shown, Figures 4 to 5 The circuit diagram of a second embodiment of the COB light source of this utility model is shown. This embodiment is similar to... Figures 3 to 4 Unlike the first embodiment shown, this embodiment uses a common cathode circuit for the light source driving circuit and a driving control circuit adapted to it. The light source driving circuit and driving control circuit will be described in detail below with reference to this embodiment:

[0039] I. Light source driving circuit

[0040] In this circuit, one power supply terminal of the constant current driving module 21 is connected to the negative power supply pad, and the other power supply terminal of the constant current driving module 21 is connected to the positive power supply pad. The driving terminal of the constant current driving module 21 is connected to the negative terminals of multiple light-emitting modules 41. The two connection terminals of the switch module 22 are respectively connected to the positive terminals of the light-emitting modules 41 and the positive power supply pad. The control terminal of the switch module 22 is connected to the driving connection pad of the external driving board through the driving pad to control the on / off state between the constant current driving module 21 and the light-emitting modules 41, thereby controlling one or more light-emitting modules 41 to work and realize the display requirements of different colors.

[0041] II. Drive Control Circuit

[0042] The drive control circuit includes a controller U1, a second resistor R1, a second Zener diode D1, and a second capacitor C1. The controller U1 includes a power supply pin VDD, a ground pin GND, and multiple output pins (P10, P11, P12, P14, and P15). The power supply pin VDD is connected to the power supply. The power supply pin VDD is also connected to one end of the second resistor R1 via the second Zener diode D1 and the second capacitor C1. The other end of the second resistor R1 is connected to the ground terminal. The ground pin GND is connected to the ground terminal via the second resistor R1. The output pins are configured one-to-one with the light-emitting modules 41. The output pins are connected to the power supply via resistor modules (R2, R3, R4, R5, and R6) and connected to the control terminal of the switch module 22 via the drive connection pad and the drive pad, thereby controlling the on / off state between the constant current drive module 21 and the light-emitting modules 41, and thus controlling one or more light-emitting modules 41 to work to achieve different color display requirements.

[0043] Preferably, the switching module 22 is a PMOS transistor, but it is not limited thereto.

[0044] This utility model also discloses a COB lamp, including a lamp body and the aforementioned multi-color constant voltage COB light source, wherein the multi-color constant voltage COB light source is disposed in the lamp body. Since the aforementioned multi-color constant voltage COB light source has the aforementioned technical effects, the COB lamp including the aforementioned multi-color constant voltage COB light source should also have the aforementioned technical effects, and will not be elaborated further here.

[0045] In summary, this invention integrates the constant current drive module and the switching module onto the COB light source. On one hand, the COB substrate, with its excellent heat dissipation properties, effectively cools the heat-generating constant current drive module and switching module, achieving better heat dissipation than the drive board itself, thus ensuring excellent circuit stability. On the other hand, it enables the COB light source to illuminate using low-current drive circuitry, meeting the display requirements for different colors. Furthermore, it allows for the use of thinner drive wires to control the connection between the drive board and the COB light source, facilitating assembly and wiring, reducing installation difficulty, and improving installation efficiency.

[0046] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A multi-color constant voltage COB light source, characterized in that, The substrate includes a device mounting area, a soldering area and a light source area, wherein the light source area contains a multi-channel light-emitting module; The device mounting area is provided with at least one constant current driving module and a switching module, and the switching module is configured in a one-to-one correspondence with the light-emitting module; The welding area includes a power pad and a drive pad. The power pad is connected to the power connection pad of the external drive board and the constant current drive module, respectively, and is used to supply power to the constant current drive module. The drive pad is set one-to-one with the light-emitting module. The switching module is connected to the constant current driving module and the light-emitting module respectively. The switching module is also connected to the driving connection pad of the external driving board via a corresponding driving pad, and is used to control the on / off state between the constant current driving module and the light-emitting module according to the driving signal of the external driving board.

2. The multi-color constant voltage COB light source of claim 1, wherein, The external driver board is provided with a drive control circuit, and the drive control circuit is provided with multiple output terminals, each of which is configured to correspond one-to-one with the light-emitting module. The output terminal is connected to the switch module via the drive connection pad and the drive pad, and is used to control the working state of the switch module.

3. The multi-color constant voltage COB light source of claim 2, wherein, The power pad includes a positive power pad and a negative power pad. One power terminal of the constant current driving module is connected to the positive power pad, and the other power terminal of the constant current driving module is connected to the negative power pad. The driving terminal of the constant current driving module is connected to the positive terminal of the multiple light-emitting modules. The two connection terminals of the switch module are respectively connected to the negative terminal of the light-emitting module and the negative terminal of the power supply pad, and the control terminal of the switch module is connected to the drive connection pad of the external drive board via the drive pad.

4. The multi-color constant voltage COB light source of claim 2, wherein, The power pad includes a positive power pad and a negative power pad. One power terminal of the constant current driving module is connected to the negative power pad, and the other power terminal of the constant current driving module is connected to the positive power pad. The driving terminal of the constant current driving module is connected to the negative terminal of the multiple light-emitting modules. The two connection terminals of the switch module are respectively connected to the positive terminal of the light-emitting module and the positive terminal of the power supply pad, and the control terminal of the switch module is connected to the drive connection pad of the external drive board via the drive pad.

5. The multi-color constant voltage COB light source of claim 3, wherein, The drive control circuit includes a controller, which includes a power supply pin, a ground pin, and multiple output pins. The power supply pin is connected to a power supply, and the ground pin is connected to a ground terminal. The output pins are configured to correspond one-to-one with the light-emitting modules. The output pins are connected to the ground terminal via the resistor module, and connected to the control terminal of the switch module via the drive connection pad and the drive pad.

6. The multi-color constant voltage COB light source of claim 4, wherein, The drive control circuit includes a controller, which includes a power supply pin, a ground pin, and multiple output pins. The power supply pin is connected to a power supply, and the ground pin is connected to a ground terminal. The output pins are configured to correspond one-to-one with the light-emitting modules. The output pins are connected to the power supply via the resistor module and to the control terminal of the switch module via the drive connection pad and the drive pad.

7. The multi-color constant voltage COB light source according to claim 3 or 5, wherein, The switching module is an NMOS transistor.

8. The multi-color constant voltage COB light source according to claim 4 or 6, wherein, The switching module is a PMOS transistor.

9. The multi-color constant voltage COB light source of claim 1, wherein, The light emitting module comprises at least one LED lamp.

10. A COB luminaire characterized in that, The light body and the multi-color constant-voltage COB light source according to any one of claims 1 to 9 are arranged in the light body.

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