CN201957303U - High-efficiency ultra-low-interference light emitting diode (LED) sound-control energy-saving lamp - Google Patents

Abstract

The utility model discloses a high-efficiency ultra-low interference LED sound-activated energy-saving lamp, which comprises a lamp body and a circuit control board installed in the lamp body. The circuit control board is provided with a driving circuit, and the input end of the driving circuit is connected with the lamp body. terminal connection, the circuit control board is also provided with a sound control circuit, the sound control circuit is composed of a sound sensor, a delay circuit, a photocoupler and an output switch circuit, one end of the output switch circuit is connected to the current sampling end of the drive circuit, One end is connected with a delay circuit through a photoelectric coupler, and the delay circuit is connected with an acoustic sensor. Compared with the prior art, the LED energy-saving lamp of the utility model realizes the automatic adjustment of brightness under different working environments, improves the utilization rate of energy, reduces the loss of electric energy, and one LED energy-saving lamp corresponds to one control circuit, and can be installed directly Use, no need to add additional sound control circuits, reducing installation costs.

Description

High-efficiency ultra-low interference LED sound-activated energy-saving lamps

technical field

The utility model belongs to the technical field of light-emitting diode LED lighting, in particular to a high-efficiency ultra-low interference LED sound-activated energy-saving lamp, which is mainly used in public places, passageways, parking lots and other places.

Background technique

As a new type of light-emitting device, LED is widely used in daily lighting because of its long service life, high luminous efficiency, no radiation and low power consumption.

The current LED energy-saving lamps mainly use constant current power supply, and the current is relatively stable, so the luminous brightness of LED energy-saving lamps can remain basically unchanged. Under normal circumstances, the continuous supply of constant current will cause energy waste, such as no energy at night. When people are in the state, the brightness of the LED energy-saving lamp can be appropriately reduced to achieve the purpose of reducing energy consumption. When there are people, the brightness of the LED energy-saving lamp can be adjusted to a normal state. The external sound control circuit has a complex installation environment and needs to be installed wherever it is needed, which is not only costly, but also very inconvenient to maintain.

Contents of the invention

Therefore, the purpose of this utility model is to provide a high-efficiency ultra-low interference LED sound-activated energy-saving lamp. The LED energy-saving lamp is provided with an internal voice control circuit, so that a single LED energy-saving lamp can constitute a lighting device with automatic brightness adjustment.

In order to achieve the above object, the utility model mainly adopts the following technical solutions:

A high-efficiency ultra-low-interference LED sound-activated energy-saving lamp, including a lamp body and a circuit control board installed in the lamp body, the circuit control board is provided with a drive circuit, the input end of the drive circuit is connected to the terminal of the lamp body, and the The circuit control board is also provided with a sound control circuit, and the sound control circuit is composed of a sound sensor, a delay circuit, a photocoupler and an output switch circuit, and one end of the output switch circuit is connected to the rectification filter 135V and the current sampling end of the drive circuit, One end is connected with a delay circuit through a photoelectric coupler, and the delay circuit is connected with an acoustic sensor.

A bridge rectifier circuit is also connected between the photoelectric coupler and the delay circuit.

The delay circuit includes a Zener diode Z2, a transistor Q3, a delay capacitor C2 and a transistor Q2, and the collector of the transistor Q3 is connected to the base of the transistor Q2 through the delay capacitor C2.

Wherein the collector of the triode Q2 is also connected with a thyristor G.

Wherein the delay circuit is connected with the acoustic sensor through the transistor Q4.

The utility model collects the external sound signal through the sound sensor collection, and realizes the on-off control of the triode through the sound signal, so that the thyristor can adjust the output voltage of the photoelectric coupler and the output switch circuit, and control the main The operating current supplied to the LED by the driving output increases or decreases, so as to realize the increase or decrease of the brightness of the LED lamp. Compared with the prior art, the LED energy-saving lamp of the utility model realizes the automatic adjustment of brightness under different working environments, improves the utilization rate of energy, reduces the loss of electric energy, and one LED energy-saving lamp corresponds to one control circuit, and can be installed directly Using it, there is no need to add an additional voice control circuit, which reduces the installation cost and is very convenient for subsequent maintenance.

Description of drawings

Fig. 1 is a functional block diagram of the utility model.

Fig. 2 is the principle diagram of the sound control circuit of the utility model.

Detailed ways

The core idea of the utility model is: by setting a sound control circuit on the internal main circuit control board of the LED energy-saving lamp, the sound sensor of the sound control circuit collects the external sound signal, and realizes the SCR of the sound control circuit according to the sound signal. Control the on-off to realize the control of voltage and current, and finally amplify the signal through the photocoupler, and adjust the brightness of the LED energy-saving lamp by the output switch circuit.

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

See also shown in Fig. 1, Fig. 1 is a functional block diagram of the present utility model. The LED energy-saving lamp described in the utility model includes a lamp body and a circuit control board installed in the lamp body. A drive circuit and a voice control circuit are arranged on the circuit control board. One end of the drive circuit is connected to the lamp body. The power supply terminal is connected, and the other end is the input end, which is directly connected to the voice control circuit.

The driving circuit here mainly adopts BP2808 chip, BP2808 is a constant current control chip specially driving LED light source. BP2808 works in the continuous current mode step-down system, the chip controls the peak current and ripple current of the LED light source, so as to realize the constant average current of the LED light source. The chip uses very few external components to realize functions such as constant current control, analog dimming and PWM dimming. The system application voltage ranges from 12VDC to 600VDC, and the duty cycle can reach up to 100%; it is suitable for AC 85V-265V wide voltage input, and is mainly used in non-isolated LED lighting power drive systems. BP2808 adopts source drive and constant current compensation technology, so that the current driving the LED light source is constant, and the change from AC 85V-265V is less than ±3%. Combined with the BP2808 drive system application circuit, the 18W LED fluorescent lamp is a practical solution, and the system efficiency is higher than 90% in the range of AC 85V-265V. In the AC 85V-265V input range, BP2808 can drive LED light source arrays from 3W to 36W.

In addition, BP2808 has multiple LED protection functions including LED open-circuit protection, LED short-circuit protection, and over-temperature protection. Once a system fault occurs, the power system will automatically enter the protection state until the fault is resolved, and the system will automatically re-enter the normal working mode. The multiplexed DIM pin can be used for LED analog dimming, PWM dimming and dynamic temperature protection of the lighting system.

Wherein said sound control circuit is made up of acoustic sensor, delay circuit, bridge rectifier circuit, photoelectric coupler and output switch circuit, and said output switch circuit has three connection ends, and the first and third connection ends are connected with the above-mentioned drive circuit The 135V rectification and filtering positive and negative output terminals are connected, and the output switching circuit is powered through the drive circuit; the second connection terminal is directly connected to the current sampling terminal of BP2808 to control the output current of the LED light source; and the photocoupler and the bridge The rectifier circuit and the delay circuit are connected to the acoustic sensor.

As shown in Figure 2, Figure 2 is a schematic diagram of the voice control circuit of the present invention. The output switching circuit includes triodes Q01, Q02, Q03, Zener diode Z1 and load resistor R07. The collector of Q03 is connected to the CS terminal of the main power supply BP2808 of the driving circuit through two parallel resistors R02 and R03, and the base is connected to To the collector of Q02, the emitter of Q02 is connected to Zener diode Z1, the base of Q02 is connected to the collector of Q01 through resistor R09, and the base of Q01 is connected to photocoupler U2 and load resistor R07; output The switch circuit is connected to the bridge rectifier circuit U1 through the photocoupler U2, and the bridge rectifier circuit U1 is connected to the delay circuit.

The time-delay circuit includes a Zener diode Z2, a transistor Q3, a delay capacitor C2 and a transistor Q2, the collector of the transistor Q3 is connected to the base of the transistor Q2 through a delay capacitor C2, and the base of the transistor Q3 is connected to the base of the transistor Q3 through a capacitor C6. The collector of the triode Q4 is connected, and the emitters of the triodes Q2, Q3, and Q4 are grounded; the collector of the triode Q2 is connected with a thyristor G, through which the thyristor G is connected with the bridge rectifier circuit U1, and the triode Q4 The base is connected to the acoustic sensor BM through a capacitor C5.

The working principle of the utility model is: the output impedance of the acoustic sensor BM is connected to the external load resistor R14. When the BM has a sound source input and the base input voltage of Q3 reaches a certain value, Q3 is turned on, and the discharge of C2 is delayed for about 1 minute. During the period, Q2 cuts off and Q1 is turned on so that the photocoupler U2 does not work, and the base of Q01 is turned on when it gets high level, and Q02 and Q03 are turned on successively. At this time, the output controls the CS terminal of the main power supply BP2808 to make the LED work. The current increases and the brightness increases (the LED works in low brightness mode when there is no external sound interference); when C2 is discharged, Q2 is turned on, Q1 is turned off, U2 is turned on, Q01 is turned off, Q02 and Q03 are turned off successively, and there is no output to control the CS terminal of the main power supply BP2808 In this way, the LED returns to the original low-brightness mode, and the voice control circuit is in a waiting state again, so it works again and again.

The above is a detailed introduction of a high-efficiency ultra-low interference LED sound-activated energy-saving lamp described in the utility model. In this paper, specific examples are used to illustrate the principle and implementation of the utility model. The description of the above examples is only for helping Understand the core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation and scope of application. In summary, the contents of this specification should not It should be understood as a limitation of the present utility model.

Claims (5)

1. A high-efficiency ultra-low-interference LED sound-activated energy-saving lamp, comprising a lamp body and a circuit control board installed in the lamp body, the circuit control board is provided with a drive circuit, the drive circuit input terminal is connected to the lamp body terminal, It is characterized in that a sound control circuit is also arranged on the circuit control board, and the sound control circuit is composed of a sound sensor, a delay circuit, a photoelectric coupler and an output switch circuit, one end of the output switch circuit is connected to the current sampling end of the driving circuit, One end is connected with a delay circuit through a photoelectric coupler, and the delay circuit is connected with an acoustic sensor. 2. The LED sound-activated energy-saving lamp according to claim 1, characterized in that a bridge rectifier circuit is connected between the photocoupler and the delay circuit. 3. The LED sound-activated energy-saving lamp according to claim 1, wherein the delay circuit includes a voltage regulator diode Z2, a transistor Q3, a delay capacitor C2, and a transistor Q2, and the collector of the transistor Q3 is delayed by The capacitor C2 is connected to the base of the transistor Q2. 4. The LED sound-activated energy-saving lamp according to claim 2, characterized in that the collector of the triode Q2 is further connected with a thyristor G. 5. The LED sound-activated energy-saving lamp according to claim 1, characterized in that the delay circuit is connected to the sound sensor through a transistor Q4.

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