CN212324421U - LED emergency lamp - Google Patents

LED emergency lamp Download PDF

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CN212324421U
CN212324421U CN202021032472.2U CN202021032472U CN212324421U CN 212324421 U CN212324421 U CN 212324421U CN 202021032472 U CN202021032472 U CN 202021032472U CN 212324421 U CN212324421 U CN 212324421U
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circuit
voltage
light source
driving
switch
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朱朝军
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Xi'an New Moore Semiconductor Co ltd
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Xi'an New Moore Semiconductor Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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Abstract

The application relates to the technical field of emergency lighting and discloses an LED emergency lamp which comprises an energy storage battery, a power-off switch circuit, a power control circuit and an LED light source. The power supply control circuit comprises a timing circuit, a voltage conversion circuit and a light source driving circuit, wherein the timing circuit is used for starting timing when power is lost and respectively sending a first time signal and a second time signal to the voltage conversion circuit at a first moment and a second moment, the voltage conversion circuit is used for respectively outputting a first driving voltage and a second driving voltage to the light source driving circuit when receiving the first time signal and the second time signal, and the light source driving circuit is used for outputting a first driving current or a second driving current to the LED light source when receiving the first driving voltage or the second driving voltage. Because the power control circuit outputs different driving currents according to the preset time to drive the LED light source, the working time of the LED emergency lamp is increased.

Description

LED emergency lamp
Technical Field
The application relates to the technical field of emergency lighting, in particular to an LED emergency lamp.
Background
The emergency lamp is an emergency lighting tool, and can still play a lighting function when the mains supply is disconnected in case of power failure caused by emergency, such as earthquake or fire; the emergency lamp is only lighted in emergency, and the illuminating lamp is only lighted when the commercial power is normal; in order to facilitate the emergency power supply, the emergency power supply can be directly added to the lighting lamp, so that the lighting lamp can be lighted and charged after the mains supply is disconnected, and an emergency effect is achieved. In the use process of the emergency lamp, the emergency lighting is required to be in a closed state under the normal condition of normal power supply, namely the emergency lighting lamp is not on; only when the conventional power supply system fails, the emergency illuminating lamp can be turned on. And emergency lighting mainly comprises: 1) the work illumination, the required luminance is high, and the luminance is unanimous as far as possible before the outage, does not influence the going on of work. However, in this kind of working mode, because the power of the emergency light is generally supplied by the battery, when the battery power is not enough, the emergency light can reduce the brightness fast, and then can bring the potential safety hazard to the production work. 2) The illumination for escaping, the emergency illumination for escaping have no high requirement on the brightness, and the longer the time, the better. Based on the above application of the emergency lamp, how to prolong the illumination time limit of the emergency lamp is a main research direction and a research focus of the emergency illumination technology.
Disclosure of Invention
The application discloses a LED emergency light solves because of the electric quantity restriction of emergency light battery, the technical problem that emergency light illumination time is short.
According to a first aspect, an LED emergency lamp comprises an energy storage battery, a power-off switch circuit, a power supply control circuit and an LED light source;
the power-off switch circuit is connected between the energy storage battery and the power supply control circuit and is used for conducting when power is off so that the energy storage battery supplies power to the power supply control circuit;
the power supply control circuit comprises a timing circuit, a voltage conversion circuit and a light source driving circuit;
the timing circuit is used for starting timing when power is lost, sending a first time signal to the voltage conversion circuit at a first moment, and sending a second time signal to the voltage conversion circuit at a second moment after the first moment;
the voltage conversion circuit is connected between the power-off switch circuit and the light source driving circuit and is used for outputting a first driving voltage when receiving a first time signal and outputting a second driving voltage when receiving a second time signal, wherein the first driving voltage is greater than the second driving voltage;
the light source driving circuit is connected between the voltage conversion circuit and the LED light source and is used for driving the LED light source; the light source driving circuit outputs a first driving current to the LED light source when receiving a first driving voltage, and outputs a second driving current to the LED light source when receiving a second driving voltage, wherein the first driving current is larger than the second driving current.
Further, the voltage conversion circuit includes a voltage switching switch circuit, a first voltage reduction circuit, and a second voltage reduction circuit; the voltage switching circuit is respectively connected with the timing circuit and the light source driving circuit; the first voltage reduction circuit and the second voltage reduction circuit are respectively connected between the voltage switching circuit and the light source driving circuit;
the voltage switching circuit is used for switching the first voltage reduction circuit to output the first driving voltage to the light source driving circuit when receiving the first time signal; the voltage switching circuit is further configured to switch the second voltage reduction circuit to output the second driving voltage to the light source driving circuit when the second time signal is received.
Further, the voltage switching switch circuit comprises a switch control circuit and at least one MOS switch tube, wherein the switch control circuit is connected with the timing circuit and is used for outputting a first PWM signal or a second PWM signal and sending the first PWM signal or the second PWM signal to the control end of the MOS switch tube when receiving the first time signal or the second time signal.
Furthermore, a first pole of the MOS switch tube is connected with the power-off switch circuit, and a second pole of the MOS switch tube is connected with the first voltage reduction circuit, the second voltage reduction circuit and the light source driving circuit.
Further, the first time is 30 minutes; and/or, the second time is 90 minutes.
Further, the power supply control circuit further comprises a voltage detection circuit for monitoring the voltage value of the energy storage battery, and when the current voltage value of the energy storage battery is monitored to be smaller than the nominal voltage of the energy storage battery and larger than a first preset value, a first voltage control signal is sent to the voltage conversion circuit; the voltage conversion circuit is further configured to output the first driving voltage to the light source driving circuit when receiving the first voltage control signal.
Further, the voltage detection circuit is also used for sending a second voltage control signal to the voltage conversion circuit when the current voltage value of the energy storage battery is monitored to be smaller than the first preset value; the voltage conversion circuit is further configured to output the second driving voltage to the light source driving circuit when receiving the second voltage control signal.
Further, the voltage conversion circuit includes a voltage switching switch circuit, a first voltage reduction circuit, and a second voltage reduction circuit; the voltage switching circuit is respectively connected with the voltage detection circuit and the light source driving circuit; the first voltage reduction circuit and the second voltage reduction circuit are respectively connected between the voltage switching circuit and the light source driving circuit;
the voltage switching circuit is used for switching the first voltage reduction circuit to output the first driving voltage to the light source driving circuit when receiving the first voltage control signal; the voltage switching circuit is further configured to switch the second voltage reduction circuit to output the second driving voltage to the light source driving circuit when receiving the second voltage control signal.
Further, the voltage switching circuit comprises a switch control circuit and at least one MOS switch tube, wherein the switch control circuit is connected with the voltage detection circuit and is used for outputting a third PWM signal or a fourth PWM signal and sending the third PWM signal or the fourth PWM signal to the control end of the MOS switch tube when receiving the first voltage control signal or the second voltage control signal.
Further, a first pole of the MOS switch tube is connected to the power-off switch circuit, and a second pole of the MOS switch tube is connected to the first voltage-reducing circuit, the second voltage-reducing circuit, or the light source driving circuit.
According to the embodiment, the LED emergency lamp comprises the energy storage battery, the power-off switch circuit, the power supply control circuit and the LED light source. The power supply control circuit comprises a timing circuit, a voltage conversion circuit and a light source driving circuit, wherein the timing circuit is used for starting timing when power is lost and respectively sending a first time signal and a second time signal to the voltage conversion circuit at a first moment and a second moment, the voltage conversion circuit is used for respectively outputting a first driving voltage and a second driving voltage to the light source driving circuit when receiving the first time signal and the second time signal, and the light source driving circuit is used for outputting a first driving current or a second driving current to the LED light source when receiving the first driving voltage or the second driving voltage. Because the power control circuit outputs different driving currents to drive the LED light source according to the preset time, the lighting time of the LED emergency lamp is prolonged.
Drawings
FIG. 1 is a schematic diagram of a circuit configuration of an LED emergency light according to an embodiment;
FIG. 2 is a schematic diagram of a circuit structure of an LED emergency lamp in another embodiment;
fig. 3 is a schematic circuit structure diagram of an LED emergency lamp in another embodiment.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
The embodiment of the application provides an LED emergency lamp which comprises an energy storage battery, a power-off switch circuit, a power supply control circuit and an LED light source. The power supply control circuit comprises a timing circuit, a voltage conversion circuit and a light source driving circuit, wherein the timing circuit is used for starting timing when power is lost and respectively sending a first time signal and a second time signal to the voltage conversion circuit at a first moment and a second moment, the voltage conversion circuit is used for respectively outputting a first driving voltage and a second driving voltage to the light source driving circuit when receiving the first time signal and the second time signal, and the light source driving circuit is used for outputting a first driving current or a second driving current to the LED light source when receiving the first driving voltage or the second driving voltage. Because the power control circuit outputs different driving currents according to the preset time to drive the LED light source, the working time of the LED emergency lamp is increased.
Example one
Referring to fig. 1, a schematic diagram of a circuit structure of an LED emergency lamp in an embodiment includes an energy storage battery 1, a power-off switch circuit 2, a power control circuit 3, and an LED light source 4. The power-off switch circuit 2 is connected between the energy storage battery 1 and the power control circuit 3, and the power-off switch circuit 2 is used for conducting when power is off so that the energy storage battery 1 supplies power to the power control circuit 3. The power supply control circuit 3 includes a timer circuit 33, a voltage conversion circuit 31, and a light source drive circuit 32. The timing circuit 33 is used to start timing when power is lost, and transmit a first time signal to the voltage conversion circuit 31 at a first time, and transmit a second time signal to the voltage conversion circuit 31 at a second time after the first time. The voltage conversion circuit 31 is connected between the power-off switch circuit 2 and the light source driving circuit 31, and is configured to output a first driving voltage when receiving the first time signal, and output a second driving voltage when receiving the second time signal, where the first driving voltage is greater than the second driving voltage. In one embodiment, the first time is 30 minutes and the second time is 90 minutes. In one embodiment, the first driving voltage has a value of 60% of the nominal voltage of the energy storage cell 1, and the second driving voltage has a value of 15% of the nominal voltage of the energy storage cell 1. The light source driving circuit 32 is connected between the voltage conversion circuit 31 and the LED light source 4, and drives the LED light source 4. The light source driving circuit 32 outputs a first driving current to the LED light source 4 when receiving a first driving voltage, and outputs a second driving current to the LED light source 4 when receiving a second driving voltage, wherein the first driving current is greater than the second driving current.
In an embodiment, the power control circuit further includes a voltage detection circuit 34, configured to monitor a voltage value of the energy storage battery 1, and send a first voltage control signal to the voltage conversion circuit 31 when it is monitored that the current voltage value of the energy storage battery is smaller than the nominal voltage of the energy storage battery and greater than a first preset value. The voltage conversion circuit 31 is further configured to output the first driving voltage to the light source driving circuit 32 when receiving the first voltage control signal. The voltage detection circuit 34 is further configured to send a second voltage control signal to the voltage conversion circuit 31 when it is monitored that the current voltage value of the energy storage battery is smaller than the first preset value. The voltage conversion circuit 31 is further configured to output a second driving voltage to the light source driving circuit when receiving the second voltage control signal.
Referring to fig. 2, which is a schematic circuit diagram of an LED emergency lamp according to another embodiment, the voltage converting circuit 31 includes a voltage switching circuit 311, a first voltage dropping circuit 312, and a second voltage dropping circuit 313. The voltage switch circuit 311 is connected to the timer circuit 33, the voltage detection circuit 34, and the light source drive circuit 32. The first voltage-dropping circuit 312 and the second voltage-dropping circuit 313 are connected between the voltage-switching switch circuit 311 and the light source driving circuit 32, respectively. The voltage switching circuit 311 is configured to switch the first voltage-reducing circuit 312 to output the first driving voltage to the light source driving circuit 32 when receiving the first time signal. The voltage switching circuit is further configured to switch the second voltage dropping circuit 313 to output the second driving voltage to the light source driving circuit when receiving the second time signal. The voltage switching circuit 311 is further configured to switch the first voltage-reducing circuit 312 to output the first driving voltage to the light source driving circuit 32 when receiving the first voltage control signal. The voltage switching circuit 311 is further configured to switch the second voltage dropping circuit 313 to output the second driving voltage to the light source driving circuit 32 when receiving the second voltage control signal.
As shown in fig. 2, the power-off switch circuit 2 is connected between the energy storage battery 1 and the power control circuit 3, and the power-off switch circuit 2 is configured to be turned on when power is off, so that the energy storage battery 1 supplies power to the power control circuit 3. The power supply control circuit 3 includes a timer circuit 33, a voltage detection circuit 34, a voltage conversion circuit 31, and a light source drive circuit 32. The voltage conversion circuit 31 is used to output different driving voltages to the light source driving circuit 32. The light source driving circuit 32 is configured to output different driving currents to the LED light source 4 according to different driving voltages output by the voltage converting circuit 31, so as to drive the LED light source to emit light. When the power-off switch circuit 2 is turned on when power is off, the voltage switch circuit 311 directly inputs the output voltage of the energy storage battery to the light source driving circuit 32, so that the light source driving circuit outputs a driving current to the LED light source 4. When the voltage switch circuit 311 receives the first time signal output by the timer circuit 33 or the first voltage control signal output by the voltage detection circuit 34, the voltage switch circuit 311 connects the first voltage reduction circuit 312 between the voltage switch circuit 311 and the light source driving circuit 32, and the first voltage reduction circuit 312 provides the first driving voltage for the light source driving circuit 32. When the voltage switch circuit 311 receives the second time signal output by the timer circuit 33 or the second voltage control signal output by the voltage detection circuit 34, the voltage switch circuit 311 connects the second voltage reduction circuit 313 between the voltage switch circuit 311 and the light source driving circuit 32, and the second voltage reduction circuit 313 provides the second driving voltage for the light source driving circuit 32.
Referring to fig. 3, which is a schematic circuit diagram of an LED emergency lamp in another embodiment, the voltage switch 311 includes a switch control circuit 3110 and three MOS switch transistors K1, K2, and K3. The first poles of the MOS switch tube K1, the MOS switch tube K2 and the MOS switch tube K3 are connected with a power-off switch circuit and used for inputting the voltage of the energy storage battery. The second poles of the MOS switch transistor K1, the MOS switch transistor K2, and the MOS switch transistor K3 are connected to the first step-down circuit 312, the second step-down circuit 313, and the light source driving circuit 32, respectively. The switch control circuit 3110 is connected to the timing circuit 33, and configured to output the first PWM signal or the second PWM signal and send the first PWM signal or the second PWM signal to the control end of the MOS switch transistor when receiving the first time signal or the second time signal. In one embodiment, a first pole of the MOS switch is connected to the power-off switch circuit 2, and a second pole of the MOS switch is connected to the first voltage-dropping circuit 312, the second voltage-dropping circuit 313 and the light source driving circuit 32. That is, when the switch control circuit 3110 receives the first time signal, the first PWM signal is output to the control terminal of the MOS switch transistor K1, the MOS switch transistor K1 is turned on, and the first voltage-reducing circuit 312 inputs the first driving voltage to the light source driving circuit 32. When the switch control circuit 3110 receives the second time signal, the second PWM signal is output to the control terminal of the MOS switch transistor K2, the MOS switch transistor K2 is turned on, and the second voltage-reducing circuit 313 inputs the second driving voltage to the light source driving circuit 32.
The switch control circuit 3110 is further configured to output a third PWM signal or a fourth PWM signal and send the third PWM signal or the fourth PWM signal to the control end of the MOS switch tube when receiving the first voltage control signal or the second voltage control signal. In one embodiment, a first pole of the MOS switch is connected to the power-off switch circuit 2, and a second pole of the MOS switch is connected to the first voltage-dropping circuit 312, the second voltage-dropping circuit 313 and the light source driving circuit 32. That is, when the switch control circuit 3110 receives the first voltage control signal, the third PWM signal is output to the control terminal of the MOS switch transistor K1, the MOS switch transistor K1 is turned on, and the first voltage reduction circuit 312 inputs the first driving voltage to the light source driving circuit 32. When the switch control circuit 3110 receives the second voltage control signal, the fourth PWM signal is output to the control terminal of the MOS switch transistor K2, the MOS switch transistor K2 is turned on, and the second voltage-reducing circuit 313 inputs the second driving voltage to the light source driving circuit 32. When the MOS switch transistor K3 is turned on, the voltage of the energy storage cell 1 is input to the light source driving circuit 32. When the MOS switch tube K1 is turned on, the voltage of the energy storage cell 1 is dropped to the first driving voltage by the first voltage dropping circuit 312 and then is inputted to the light source driving circuit 32. When the MOS switch tube K2 is turned on, the voltage of the energy storage cell 1 is dropped to the second driving voltage by the second voltage dropping circuit 313 and then is inputted to the light source driving circuit 32.
In the embodiment of the application, an LED emergency lamp is disclosed, which comprises an energy storage battery, a power-off switch circuit, a power control circuit and an LED light source. The power supply control circuit comprises a timing circuit, a voltage conversion circuit and a light source driving circuit, wherein the timing circuit is used for starting timing when power is lost and respectively sending a first time signal and a second time signal to the voltage conversion circuit at a first moment and a second moment, the voltage conversion circuit is used for respectively outputting a first driving voltage and a second driving voltage to the light source driving circuit when receiving the first time signal and the second time signal, and the light source driving circuit is used for outputting a first driving current or a second driving current to the LED light source when receiving the first driving voltage or the second driving voltage. Because the power control circuit outputs different driving currents according to the preset time to drive the LED light source, the working time of the LED emergency lamp is increased.
The present application has been described with reference to specific examples, which are provided only to aid understanding of the present application and are not intended to limit the present application. For a person skilled in the art to which the application pertains, several simple deductions, modifications or substitutions may be made according to the idea of the application.

Claims (10)

1. An LED emergency lamp is characterized by comprising an energy storage battery, a power-off switch circuit, a power supply control circuit and an LED light source;
the power-off switch circuit is connected between the energy storage battery and the power supply control circuit and is used for conducting when power is off so that the energy storage battery supplies power to the power supply control circuit;
the power supply control circuit comprises a timing circuit, a voltage conversion circuit and a light source driving circuit;
the timing circuit is used for starting timing when power is lost, sending a first time signal to the voltage conversion circuit at a first moment, and sending a second time signal to the voltage conversion circuit at a second moment after the first moment;
the voltage conversion circuit is connected between the power-off switch circuit and the light source driving circuit and is used for outputting a first driving voltage when receiving a first time signal and outputting a second driving voltage when receiving a second time signal, wherein the first driving voltage is greater than the second driving voltage;
the light source driving circuit is connected between the voltage conversion circuit and the LED light source and is used for driving the LED light source; the light source driving circuit outputs a first driving current to the LED light source when receiving a first driving voltage, and outputs a second driving current to the LED light source when receiving a second driving voltage, wherein the first driving current is larger than the second driving current.
2. The LED emergency lamp of claim 1, wherein the voltage conversion circuit comprises a voltage switcher circuit, a first voltage dropping circuit, and a second voltage dropping circuit; the voltage switching circuit is respectively connected with the timing circuit and the light source driving circuit; the first voltage reduction circuit and the second voltage reduction circuit are respectively connected between the voltage switching circuit and the light source driving circuit;
the voltage switching circuit is used for switching the first voltage reduction circuit to output the first driving voltage to the light source driving circuit when receiving the first time signal; the voltage switching circuit is further configured to switch the second voltage reduction circuit to output the second driving voltage to the light source driving circuit when the second time signal is received.
3. The LED emergency lamp according to claim 2, wherein the voltage switching circuit comprises a switch control circuit and at least one MOS switching tube, and the switch control circuit is connected to the timing circuit and configured to output a first PWM signal or a second PWM signal to the control terminal of the MOS switching tube when receiving the first time signal or the second time signal.
4. The LED emergency lamp of claim 3, wherein a first pole of the MOS switch tube is connected to the power-off switch circuit, and a second pole of the MOS switch tube is connected to the first voltage-dropping circuit, the second voltage-dropping circuit and the light source driving circuit.
5. The LED emergency light of claim 1, wherein the first time is 30 minutes; and/or, the second time is 90 minutes.
6. The LED emergency lamp according to claim 1, wherein the power control circuit further comprises a voltage detection circuit for monitoring a voltage value of the energy storage battery, and when it is monitored that a current voltage value of the energy storage battery is smaller than a nominal voltage of the energy storage battery and larger than a first preset value, sending a first voltage control signal to the voltage conversion circuit; the voltage conversion circuit is further configured to output the first driving voltage to the light source driving circuit when receiving the first voltage control signal.
7. The LED emergency lamp according to claim 6, wherein the voltage detection circuit is further configured to send a second voltage control signal to the voltage conversion circuit when the current voltage value of the energy storage battery is monitored to be smaller than the first preset value; the voltage conversion circuit is further configured to output the second driving voltage to the light source driving circuit when receiving the second voltage control signal.
8. The LED emergency lamp of claim 7, wherein the voltage conversion circuit comprises a voltage switcher circuit, a first voltage dropping circuit, and a second voltage dropping circuit; the voltage switching circuit is respectively connected with the voltage detection circuit and the light source driving circuit; the first voltage reduction circuit and the second voltage reduction circuit are respectively connected between the voltage switching circuit and the light source driving circuit;
the voltage switching circuit is used for switching the first voltage reduction circuit to output the first driving voltage to the light source driving circuit when receiving the first voltage control signal; the voltage switching circuit is further configured to switch the second voltage reduction circuit to output the second driving voltage to the light source driving circuit when receiving the second voltage control signal.
9. The LED emergency lamp according to claim 8, wherein the voltage switching circuit comprises a switch control circuit and at least one MOS switch tube, and the switch control circuit is connected to the voltage detection circuit and configured to output a third PWM signal or a fourth PWM signal to the control terminal of the MOS switch tube when receiving the first voltage control signal or the second voltage control signal.
10. The LED emergency lamp of claim 9, wherein a first pole of the MOS switch is connected to the power-off switch circuit, and a second pole of the MOS switch is connected to the first voltage-dropping circuit, the second voltage-dropping circuit, or the light source driving circuit.
CN202021032472.2U 2020-06-08 2020-06-08 LED emergency lamp Active CN212324421U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021032472.2U CN212324421U (en) 2020-06-08 2020-06-08 LED emergency lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021032472.2U CN212324421U (en) 2020-06-08 2020-06-08 LED emergency lamp

Publications (1)

Publication Number Publication Date
CN212324421U true CN212324421U (en) 2021-01-08

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Application Number Title Priority Date Filing Date
CN202021032472.2U Active CN212324421U (en) 2020-06-08 2020-06-08 LED emergency lamp

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