CN210469805U - Voltage-variable LED light-emitting module circuit - Google Patents

Abstract

The utility model discloses a changeable LED of voltage light emitting module circuit, including first LED circuit, second LED circuit and current control circuit, the negative pole of first LED circuit, the positive pole of second LED circuit and the first output of current control circuit are connected, the negative pole of second LED circuit and the second output of current control circuit are connected, the maximum on-current of the first output of current control circuit to its earthing terminal is less than the normal output current of linear constant current module, the second output of current control circuit keeps the on-state, when the electric current of the second output of current control circuit is more than or equal to the maximum on-current of its first output, its first output ends cut off, otherwise its first output switches on and the on-current is the difference between the maximum on-current of first output and the electric current of second output; the advantage is that the turn-on voltage can vary with the change of the grid voltage, and the use requirement of users in areas with unstable grid voltage is met.

Description

Voltage-variable LED light-emitting module circuit

Technical Field

The utility model relates to a LED light emitting module circuit especially relates to a changeable LED light emitting module circuit of voltage.

Background

Linear LED filament lamps have been widely used due to their high luminous efficiency, low cost, omnidirectional emission, and appearance similar to conventional incandescent lamps.

The existing linear LED filament lamp consists of a lamp cap, a linear constant current module and an LED glass bulb, wherein the lamp cap is provided with two connecting ends used for connecting commercial power alternating current, one of the connecting ends is a live wire connecting end, the other connecting end is a zero line connecting end, the linear constant current module is arranged in the inner space of the lamp cap, and the linear constant current module is provided with a live wire input end, a zero line input end, a positive output end and a negative output end. The linear constant current module can convert commercial power alternating current into constant current to be output to the positive output end and the negative output end of the linear constant current module. The live wire input end of the linear constant current module is connected with the live wire connecting end of the lamp holder, and the zero line input end of the linear constant current module is connected with the zero line connecting end of the lamp holder. The LED glass bulb comprises a glass bulb shell and an LED light-emitting module arranged inside the glass bulb shell, the LED light-emitting module is provided with a positive electrode and a negative electrode, and the positive electrode and the negative electrode of the LED light-emitting module are respectively LED out of the glass bulb shell through wires. Because the glass bulb is filled with gas for heat dissipation, the glass bulb is required to have higher air tightness, so that the smaller the number of the internal and external connecting wires of the LED glass bulb is, the smaller the risk of air leakage is, the higher the reliability is, and the lower the production cost is. Currently, the LED glass bulb has two leading-out wires, namely, a positive connecting wire and a negative connecting wire of the LED light-emitting module, the positive connecting wire of the LED light-emitting module is connected to the positive output end of the linear constant current module, and the negative connecting wire of the LED light-emitting module is connected to the negative output end of the linear constant current module. An LED light emitting module of an existing linear LED filament lamp is formed by connecting a plurality of LED light emitting modules in series or in parallel. As shown in fig. 1, the LED lighting module is formed by connecting the positive and negative electrodes of a plurality of LED luminaries in series, each LED luminary has a positive electrode and a negative electrode, the positive electrode of the first LED luminary is used as the positive electrode of the LED lighting module, and the negative electrode of the last LED luminary is used as the negative electrode of the LED lighting module. The LED luminous body is an LED wafer, when the LED luminous module is prepared, a plurality of LED luminous bodies are fixed on a strip-shaped substrate of the LED luminous module, the anode of the LED luminous module is arranged at one end of the strip-shaped substrate, the cathode of the LED luminous module is arranged at the other end of the strip-shaped substrate, the LED luminous bodies are sequentially arranged between one end and the other end of the strip-shaped substrate, the anode of the LED luminous module is connected with the anode of the 1 st LED luminous body, the cathode of the previous LED luminous body is connected with the anode of the next LED luminous body until the last LED luminous body, and the cathode LED of the last LED luminous body is connected with the cathode of the LED luminous module.

The LED light-emitting module is fixed when the conduction voltage between the anode and the cathode is fixed, and when the input voltage between the anode and the cathode is smaller than the voltage of the LED light-emitting module, the LED light-emitting module cannot be conducted, and no current flows through the LED light-emitting module to emit light. In an area with unstable power grid voltage, the alternating current of the mains supply inevitably fluctuates, and when the fluctuation is lower than the conduction voltage of the LED light-emitting module, the linear LED filament lamp is not lighted, so that the use requirement of a user cannot be met.

Disclosure of Invention

The utility model aims to solve the technical problem that a changeable LED light emitting module circuit of voltage is provided, this LED light emitting module circuit's turn-on voltage can be along with grid voltage's change and transform, satisfies grid voltage unstable area user's user demand.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a voltage-variable LED light-emitting module circuit comprises a first LED circuit, a second LED circuit and a current control circuit, wherein the first LED circuit and the second LED circuit are respectively provided with a positive pole and a negative pole; the second output end of the current control circuit keeps a conducting state, when the current of the second output end of the current control circuit is larger than or equal to the maximum conducting current set by the first output end of the current control circuit, the first output end of the current control circuit is cut off, when the current of the second output end of the current control circuit is smaller than the maximum conducting current set by the first output end of the current control circuit, the first output end of the current control circuit is conducted, the current conducting current of the first output end is the difference value between the maximum conducting current of the first output end and the current of the second output end, the anode of the first LED circuit is the anode of the LED light-emitting module circuit, the cathode of the first LED circuit, the anode of the second LED circuit are connected with the first output end of the current control circuit, and the cathode of the second LED circuit is connected with the second output end of the current control circuit, and the grounding end of the current control circuit is the cathode of the LED light-emitting module circuit.

The first LED circuit comprises m LED luminous bodies, each LED luminous body is provided with an anode and a cathode, in the first LED circuit, the anode of the 1 st LED luminous body is the anode of the first LED circuit, the cathode of the jth LED luminous body is connected with the anode of the j +1 th LED luminous body, the cathode of the mth LED luminous body is the cathode of the first LED circuit, m is an integer greater than or equal to 2, j is 1,2, … or m-1; the second LED circuit comprises k LED luminous bodies, each LED luminous body is provided with an anode and a cathode, in the second LED circuit, the anode of the 1 st LED luminous body is the anode of the second LED circuit, the cathode of the p th LED luminous body is connected with the anode of the p +1 th LED luminous body, the cathode of the k th LED luminous body is the cathode of the second LED circuit, k is an integer greater than or equal to 2, and p is 1,2, … or k-1; the m LED luminous bodies in the first LED circuit and the k LED luminous bodies in the second LED circuit are all low-voltage LED wafers, the positive electrode lead end of each low-voltage LED wafer is the positive electrode of each LED luminous body, and the negative electrode lead end of each low-voltage LED wafer is the negative electrode of each LED luminous body.

The first LED circuit comprises m LED luminous bodies, each LED luminous body is provided with an anode and a cathode, in the first LED circuit, the anode of the 1 st LED luminous body is the anode of the first LED circuit, the cathode of the jth LED luminous body is connected with the anode of the j +1 th LED luminous body, the cathode of the mth LED luminous body is the cathode of the first LED circuit, m is an integer greater than or equal to 2, j is 1,2, … or m-1; the second LED circuit comprises k LED luminous bodies, each LED luminous body is provided with an anode and a cathode, the anodes of the k LED luminous bodies are connected, the connecting end of the k LED luminous bodies is the anode of the second LED circuit, the cathodes of the k LED luminous bodies are connected, the connecting end of the k LED luminous bodies is the cathode of the second LED circuit, and k is an integer greater than or equal to 2; the m LED luminous bodies in the first LED circuit are all low-voltage LED wafers, the positive electrode lead end of each low-voltage LED wafer is the positive electrode of each LED luminous body, and the negative electrode lead end of each low-voltage LED wafer is the negative electrode of each LED luminous body; the k LED luminous bodies in the second LED circuit all adopt high-voltage LED wafers, the positive electrode lead end of each high-voltage LED wafer is the positive electrode of each LED luminous body, and the negative electrode lead end of each high-voltage LED wafer is the negative electrode of each LED luminous body.

The current control circuit is realized by an integrated circuit wafer with fixed conducting current.

Compared with the prior art, the utility model has the advantages that the LED light-emitting module circuit is composed of the first LED circuit, the second LED circuit and the current control circuit, the first LED circuit and the second LED circuit are respectively provided with a positive pole and a negative pole, the current control circuit is provided with a first output end, a second output end and a grounding end, the first output end of the current control circuit has a constant current conduction function, the maximum conduction current of the first output end of the current control circuit to the grounding end is preset, the maximum conduction current of the first output end of the current control circuit to the grounding end is smaller than the normal output current of the linear constant current module of the linear LED filament lamp, the second output end of the current control circuit keeps a conduction state, when the current of the second output end of the current control circuit is larger than or equal to the maximum conduction current set by the first output end, the first output end of the current control circuit is cut off, when the current of the second output end of the current control circuit is smaller than the maximum conduction current set by the first output end of the current control circuit, the first output end of the current control circuit is conducted, the current conduction current of the current control circuit is the difference value between the maximum conduction current of the first output end and the current of the second output end, the anode of the first LED circuit is the anode of the LED light-emitting module circuit, the cathode of the first LED circuit and the anode of the second LED circuit are connected with the first output end of the current control circuit, the cathode of the second LED circuit is connected with the second output end of the current control circuit, and the grounding end of the current control circuit is the cathode of the LED light-emitting module circuit; assuming that the voltage between the positive electrode and the negative electrode when the first LED circuit is turned on is V1, the voltage between the positive electrode and the negative electrode when the second LED circuit is turned on is V2, the magnitude of the on-current of the first output terminal of the current control circuit is Io, when the output terminal of the linear constant current module of the connected linear LED filament lamp can provide a voltage greater than or equal to V1+ V2, the first output terminal of the current control circuit is turned off, the first LED circuit and the second LED circuit are in a series connection state, the magnitude of the flowing current is the magnitude of the current output by the linear constant current, the voltage between the positive electrode and the negative electrode of the LED light module circuit is the sum of the voltages of the first LED circuit and the second LED circuit, the voltage is the normal operating voltage of the LED light module circuit, and when the voltage that the linear constant current module of the connected linear LED filament lamp can provide a voltage greater than or equal to V1 and less than V1+ V2, the first output terminal of the current control circuit is turned on, the current flowing through the first LED circuit is Io, at this time, the second LED circuit does not emit light, the voltage between the anode and the cathode of the LED light-emitting module circuit is between V1 and V1+2, the voltage is the maximum voltage which can be provided by the output end of the linear constant current module, when the maximum voltage provided by the linear constant current module of the connected linear LED filament lamp is less than V1, the LED light-emitting module circuit does not emit light, therefore, the LED light-emitting module circuit of the utility model can keep emitting light when the connected voltage is lower than the normal working voltage, the LED light-emitting module manufactured by the LED light-emitting module circuit technology of the utility model can keep emitting light when applied to the linear LED filament lamp, when the grid voltage deviates downwards from more voltage, the conduction voltage of the LED light-emitting module circuit of the utility model can change along with the change of the grid voltage, the use requirements of users in areas with unstable grid voltage are met.

Drawings

Fig. 1 is a circuit diagram of a conventional LED light module circuit;

fig. 2 is a structural diagram of the LED light module circuit of the present invention;

fig. 3 is a circuit diagram of a first embodiment of the LED lighting module circuit of the present invention;

fig. 4 is a circuit diagram of a second embodiment of the LED lighting module circuit of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The first embodiment is as follows: as shown in fig. 1, a voltage-variable LED lighting module circuit includes a first LED circuit, a second LED circuit and a current control circuit, the first LED circuit and the second LED circuit respectively have a positive electrode and a negative electrode, the current control circuit has a first output terminal, a second output terminal and a ground terminal, the first output terminal of the current control circuit has a constant current conducting function, the first output terminal of the current control circuit presets a maximum conducting current value to the ground terminal thereof, the maximum conducting current value to the ground terminal thereof by the first output terminal of the current control circuit is smaller than a normal output current of a linear constant current module of a linear LED filament lamp, the second output terminal of the current control circuit maintains a conducting state, when a current value at the second output terminal of the current control circuit is greater than or equal to the maximum conducting current value set by the first output terminal thereof, the first output terminal of the current control circuit is turned off, when the current of the second output end of the current control circuit is smaller than the maximum conduction current set by the first output end of the current control circuit, the first output end of the current control circuit is conducted, the current conduction current of the current control circuit is the difference value between the maximum conduction current of the first output end and the current of the second output end, the anode of the first LED circuit is the anode of the LED light-emitting module circuit, the cathode of the first LED circuit, the anode of the second LED circuit are connected with the first output end of the current control circuit, the cathode of the second LED circuit is connected with the second output end of the current control circuit, and the grounding end of the current control circuit is the cathode of the LED light-emitting module circuit.

As shown in fig. 2, in the present embodiment, the first LED circuit includes m LED luminaries (LED1-1 to LED1-m), each LED luminary has an anode and a cathode, in the first LED circuit, the anode of the 1 st LED luminary LED1-1 is the anode of the first LED circuit, the cathode of the jth LED luminary LED1-j is connected to the anode of the jth +1 LED luminary LED1- (j +1), the cathode of the mth LED luminary LED1-m is the cathode of the first LED circuit, m is an integer greater than or equal to 2, j is 1,2, …, m-1; the second LED circuit comprises k LED luminous bodies (LED 2-1-LED 1-k), each LED luminous body is provided with a positive electrode and a negative electrode, in the second LED circuit, the positive electrode of the 1 st LED luminous body LED2-1 is the positive electrode of the second LED circuit, the negative electrode of the p th LED luminous body LED2-p is connected with the positive electrode of the p +1 th LED luminous body LED2- (p +1), the negative electrode of the k th LED luminous body LED2-k is the negative electrode of the second LED circuit, k is an integer larger than or equal to 2, and p is 1,2, …, k-1; the m LED luminous bodies (LED 1-1-LED 1-m) in the first LED circuit and the k LED luminous bodies (LED 2-1-LED 1-k) in the second LED circuit both adopt low-voltage LED wafers, the positive electrode lead end of each low-voltage LED wafer is the positive electrode of each LED luminous body, and the negative electrode lead end of each low-voltage LED wafer is the negative electrode of each LED luminous body.

In this embodiment, the current control circuit is implemented by using a mature integrated circuit die with a fixed on-current.

Example two: as shown in fig. 1, a voltage-variable LED lighting module circuit includes a first LED circuit, a second LED circuit and a current control circuit, the first LED circuit and the second LED circuit respectively have a positive electrode and a negative electrode, the current control circuit has a first output terminal, a second output terminal and a ground terminal, the first output terminal of the current control circuit has a constant current conducting function, the first output terminal of the current control circuit presets a maximum conducting current value to the ground terminal thereof, the maximum conducting current value to the ground terminal thereof by the first output terminal of the current control circuit is smaller than a normal output current of a linear constant current module of a linear LED filament lamp, the second output terminal of the current control circuit maintains a conducting state, when a current value at the second output terminal of the current control circuit is greater than or equal to the maximum conducting current value set by the first output terminal thereof, the first output terminal of the current control circuit is turned off, when the current of the second output end of the current control circuit is smaller than the maximum conduction current set by the first output end of the current control circuit, the first output end of the current control circuit is conducted, the current conduction current of the current control circuit is the difference value between the maximum conduction current of the first output end and the current of the second output end, the anode of the first LED circuit is the anode of the LED light-emitting module circuit, the cathode of the first LED circuit, the anode of the second LED circuit are connected with the first output end of the current control circuit, the cathode of the second LED circuit is connected with the second output end of the current control circuit, and the grounding end of the current control circuit is the cathode of the LED light-emitting module circuit.

As shown in fig. 3, in the present embodiment, the first LED circuit includes m LED luminaries (LED1-1 to LED1-m), each of the LED luminaries has a positive electrode and a negative electrode, in the first LED circuit, the positive electrode of the 1 st LED luminary LED1-1 is the positive electrode of the first LED circuit, the negative electrode of the jth LED luminary LED1-j is connected to the positive electrode of the jth LED luminary LED1- (j +1), the negative electrode of the mth LED luminary LED1-m is the negative electrode of the first LED circuit, m is an integer greater than or equal to 2, j is 1,2, …, m-1; the second LED circuit comprises k LED luminous bodies (LED 2-1-LED 1-k), each LED luminous body is provided with a positive electrode and a negative electrode, the positive electrodes of the k LED luminous bodies (LED 2-1-LED 1-k) are connected, the connecting end of the k LED luminous bodies is the positive electrode of the second LED circuit, the negative electrodes of the k LED luminous bodies (LED 2-1-LED 1-k) are connected, the connecting end of the k LED luminous bodies is the negative electrode of the second LED circuit, and k is an integer greater than or equal to 2; the m LED luminous bodies (LED 1-1-LED 1-m) in the first LED circuit are all low-voltage LED wafers, the positive electrode lead end of each low-voltage LED wafer is the positive electrode of each LED luminous body, and the negative electrode lead end of each low-voltage LED wafer is the negative electrode of each LED luminous body; the k LED luminous bodies (LED 2-1-LED 1-k) in the second LED circuit are all high-voltage LED wafers, the positive electrode lead end of each high-voltage LED wafer is the positive electrode of each LED luminous body, and the negative electrode lead end of each high-voltage LED wafer is the negative electrode of each LED luminous body.

In this embodiment, the integrated circuit die used in the current control circuit is an integrated circuit die used in an integrated circuit chip of model RM 9023.

Claims (4)

1. A voltage-variable LED light-emitting module circuit is characterized by comprising a first LED circuit, a second LED circuit and a current control circuit, wherein the first LED circuit and the second LED circuit are respectively provided with a positive electrode and a negative electrode, the current control circuit is provided with a first output end, a second output end and a grounding end, the first output end of the current control circuit has a constant current conduction function, the maximum conduction current of the first output end of the current control circuit to the grounding end of the current control circuit is preset, the maximum conduction current of the first output end of the current control circuit to the grounding end of the current control circuit is smaller than the normal output current of a linear constant current module of a linear LED filament lamp, the second output end of the current control circuit keeps a conduction state, and when the current of the second output end of the current control circuit is larger than or equal to the maximum conduction current set by the first output end of the current control circuit, the first output end of the current control circuit is cut off, when the current of the second output end of the current control circuit is smaller than the maximum conduction current set by the first output end of the current control circuit, the first output end of the current control circuit is conducted, the current conduction current of the first output end is the difference value between the maximum conduction current of the first output end and the current of the second output end, the anode of the first LED circuit is the anode of the LED light-emitting module circuit, the cathode of the first LED circuit, the anode of the second LED circuit and the first output end of the current control circuit are connected, the cathode of the second LED circuit is connected with the second output end of the current control circuit, and the grounding end of the current control circuit is the cathode of the LED light-emitting module circuit.

2. The voltage-variable LED lighting module circuit according to claim 1, wherein the first LED circuit comprises m LED luminaries, each of the LED luminaries has a positive electrode and a negative electrode, in the first LED circuit, the positive electrode of the 1 st LED luminary is the positive electrode of the first LED circuit, the negative electrode of the jth LED luminary is connected to the positive electrode of the j +1 th LED luminary, the negative electrode of the mth LED luminary is the negative electrode of the first LED circuit, m is an integer greater than or equal to 2, j is 1,2, …, m-1;

the second LED circuit comprises k LED luminous bodies, each LED luminous body is provided with an anode and a cathode, in the second LED circuit, the anode of the 1 st LED luminous body is the anode of the second LED circuit, the cathode of the p th LED luminous body is connected with the anode of the p +1 th LED luminous body, the cathode of the k th LED luminous body is the cathode of the second LED circuit, k is an integer greater than or equal to 2, and p is 1,2, … or k-1;

the m LED luminous bodies in the first LED circuit and the k LED luminous bodies in the second LED circuit are all low-voltage LED wafers, the positive electrode lead end of each low-voltage LED wafer is the positive electrode of each LED luminous body, and the negative electrode lead end of each low-voltage LED wafer is the negative electrode of each LED luminous body.

3. The voltage-variable LED lighting module circuit according to claim 1, wherein the first LED circuit comprises m LED luminaries, each of the LED luminaries has a positive electrode and a negative electrode, in the first LED circuit, the positive electrode of the 1 st LED luminary is the positive electrode of the first LED circuit, the negative electrode of the jth LED luminary is connected to the positive electrode of the j +1 th LED luminary, the negative electrode of the mth LED luminary is the negative electrode of the first LED circuit, m is an integer greater than or equal to 2, j is 1,2, …, m-1;

the second LED circuit comprises k LED luminous bodies, each LED luminous body is provided with an anode and a cathode, the anodes of the k LED luminous bodies are connected, the connecting end of the k LED luminous bodies is the anode of the second LED circuit, the cathodes of the k LED luminous bodies are connected, the connecting end of the k LED luminous bodies is the cathode of the second LED circuit, and k is an integer greater than or equal to 2;

the m LED luminous bodies in the first LED circuit are all low-voltage LED wafers, the positive electrode lead end of each low-voltage LED wafer is the positive electrode of each LED luminous body, and the negative electrode lead end of each low-voltage LED wafer is the negative electrode of each LED luminous body;

the k LED luminous bodies in the second LED circuit all adopt high-voltage LED wafers, the positive electrode lead end of each high-voltage LED wafer is the positive electrode of each LED luminous body, and the negative electrode lead end of each high-voltage LED wafer is the negative electrode of each LED luminous body.

4. The variable voltage LED lighting module circuit of claim 1, wherein said current control circuit is implemented as an integrated circuit die having a fixed on-current.

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