Emergency lamp control circuit and lamp

Abstract

The utility model discloses an emergency lamp control circuit and a lamp, the emergency lamp control circuit comprises a power supply input end, a first triode, a second triode, a third triode, a control chip and an LED module, the power supply input end is respectively connected with the collector electrode of the first triode and the input end of the LED module; a base electrode of the first triode is connected with a first control end of the control chip, an output end of the LED module is connected with a collector electrode of the second triode, a second control end of the control chip is respectively connected with a base electrode of the second triode and a collector electrode of the third triode, and an emitting electrode of the second triode is connected with a base electrode of the third triode. The LED module is formed by connecting a plurality of LED lamps in series, so that the emergency lamp can be powered and controlled in a centralized mode.

Description

Technical Field

[0001] The utility model relates to the field of emergency light control, in particular to an emergency light control circuit and a lamp. Background Art

[0002] Fire emergency lighting is a fire emergency lighting fixture that provides lighting for personnel evacuation and firefighting operations. It is usually powered by an external power supply and automatically switches to battery power when the power is off. Generally, high-rise buildings, shopping malls, entertainment venues and other crowded places will be equipped with emergency lights. The emergency lighting system used in China is mainly self-contained power supply and independently controlled. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an emergency light control circuit and a lamp, so that the emergency light can be centrally powered and centrally controlled.

[0004] The utility model also provides a lamp having the emergency light control circuit.

[0005] According to the first aspect of the utility model, the emergency light control circuit includes: a power input end, a first triode, a second triode, a third triode, a control chip and an LED module, wherein the power input end is respectively connected to the collector of the first triode and the input end of the LED module, the base of the first triode is connected to the first control end of the control chip, the output end of the LED module is connected to the collector of the second triode, the second control end of the control chip is respectively connected to the base of the second triode and the collector of the third triode, the emitter of the second triode is connected to the base of the third triode, wherein the LED module is composed of a plurality of LED lamps connected in series.

[0006] The emergency light control circuit according to the embodiment of the utility model has at least the following beneficial effects: the conduction control of the LED module is realized by controlling the first transistor through the first control end of the control chip. Since the LED module is composed of multiple LED lamps connected in series, the control chip can control the lighting or extinguishing of multiple LED lamps at the same time, and the constant current control of the LED module is realized by setting the second transistor and the third transistor.

[0007] According to some embodiments of the utility model, a rectifier module is further included, wherein the input end of the rectifier module is connected to the power input end, the positive end of the rectifier module is respectively connected to the collector of the first transistor and the input end of the LED module, and the negative end of the rectifier module is connected to the emitter of the first transistor.

[0008] According to some embodiments of the utility model, a controllable precision voltage-stabilizing source is also included, wherein the cathode of the controllable precision voltage-stabilizing source is respectively connected to the power supply end of the control chip and the positive end of the rectifier module, and the reference pole of the controllable precision voltage-stabilizing source is respectively connected to the positive end of the rectifier module and the anode of the controllable precision voltage-stabilizing source.

[0009] According to some embodiments of the present invention, a first capacitor is further included, and the first capacitor is respectively connected between the positive terminal and the negative terminal of the rectifier module.

[0010] According to some embodiments of the utility model, a first resistor and a second resistor are also included, wherein the first end of the first resistor is connected to the positive terminal of the rectifier module, the second end of the second resistor is connected to the negative terminal of the rectifier module, and the second end of the first resistor and the first end of the second resistor are both connected to the sampling end of the control chip.

[0011] According to some embodiments of the present invention, a first diode is further included, wherein a positive terminal of the first diode is connected to a positive terminal of the rectifier module, and a negative terminal of the first diode is connected to an input terminal of the LED module.

[0012] According to some embodiments of the utility model, a third resistor, a fourth resistor, and a fifth resistor are also included. The first end of the third resistor is connected to the positive terminal of the rectifier module, the second end of the third resistor is connected to the collector of the first transistor, the fourth resistor is connected between the base of the first transistor and the first control terminal of the control chip, the first end of the fifth resistor is connected to the first control terminal of the control chip, and the second end of the fifth resistor is connected to the negative terminal of the rectifier module.

[0013] According to some embodiments of the utility model, it also includes a sixth resistor, a seventh resistor, an eighth resistor and a second capacitor, the first end of the sixth resistor is connected to the second control end of the control chip, the second end of the sixth resistor is respectively connected to the base of the second transistor and the collector of the third transistor, the first end of the seventh resistor is respectively connected to the emitter of the second transistor, the base of the third transistor and the first end of the eighth resistor, and the second end of the eighth resistor is respectively connected to the third control end of the control chip and the first end of the second capacitor.

[0014] According to some embodiments of the utility model, it also includes a ninth resistor, a tenth resistor and an eleventh resistor, the first end of the ninth resistor is connected to the positive terminal of the rectifier module, the second end of the ninth resistor is respectively connected to the controllable precision voltage-stabilizing source and the first end of the tenth resistor, the power supply end of the control chip is arranged between the connection point of the second end of the ninth resistor and the first end of the tenth resistor and the cathode end of the controllable precision voltage-stabilizing source, and the eleventh resistor is respectively connected to the reference pole and the anode of the controllable precision voltage-stabilizing source.

[0015] The lamp according to the second embodiment of the utility model includes the emergency light control circuit of the above embodiment.

[0016] The lamp according to the embodiment of the utility model has at least the following beneficial effects: the conduction control of the LED module is realized by controlling the first transistor through the first control end of the control chip, and since the LED module is composed of a plurality of LED lamps connected in series, the control chip can control the lighting or extinguishing of the plurality of LED lamps at the same time, and the constant current control of the LED module is realized by setting the second transistor and the third transistor.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 Schematic diagram of an emergency light control circuit according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] Reference Figure 1 In an embodiment of the utility model, the emergency light control circuit includes a power input terminal 100, a first transistor Q1, a second transistor Q2, a third transistor Q3, a control chip U1 and an LED module 200. The power input terminal 100 is respectively connected to the collector of the first transistor Q1 and the input terminal of the LED module 200, the base of the first transistor Q1 is connected to the first control terminal PO of the control chip U1, the output terminal of the LED module 200 is connected to the collector of the second transistor Q2, and the second control terminal EN1 of the control chip U1 is respectively connected to the base of the second transistor Q2 and the third transistor Q3. The collector of the transistor Q3 is connected, the emitter of the second transistor Q2 is connected to the base of the third transistor Q3, the working voltage required by the LED module 200 is input only through the power input terminal 100, and the conduction control of the LED module 200 is realized by controlling the first transistor Q1 through the first control terminal PO of the control chip U1. Since the LED module 200 is composed of multiple LED lamps connected in series, the control chip U1 can control multiple LED lamps to light up or extinguish at the same time, and the constant current control of the LED module 200 is realized by setting the second transistor Q2 and the third transistor Q3.

[0025] It can be understood that the emergency light control circuit also includes a rectifier module BD1, the input end of the rectifier module BD1 is connected to the power input end 100, and the alternating current input from the power input end 100 can be converted into direct current through the rectifier module BD1. The positive end of the rectifier module BD1 is respectively connected to the collector of the first transistor Q1 and the input end of the LED module 200, and the negative end of the rectifier module BD1 is connected to the emitter of the first transistor Q1. In addition, the negative end of the rectifier module BD1 is also connected to the ground end of the emergency light control circuit.

[0026] It can be understood that the emergency light control circuit also includes a controllable precision voltage regulator TL431, a ninth resistor R9, a tenth resistor R10 and an eleventh resistor R11. The first end of the ninth resistor R9 is connected to the positive terminal of the rectifier module BD1, and the second end of the ninth resistor R9 is respectively connected to the first end of the controllable precision voltage regulator TL431 and the tenth resistor R10. The power supply end of the control chip U1 is set between the connection point of the second end of the ninth resistor R9 and the first end of the tenth resistor R10 and the cathode end of the controllable precision voltage regulator TL431. The eleventh resistor R11 is respectively connected to the reference pole and anode of the controllable precision voltage regulator TL431. By setting the controllable precision voltage regulator TL431, a stable working current is provided to the power supply end of the control chip U1.

[0027] It should be noted that the emergency light control circuit also includes a first capacitor C1, which is respectively connected to the positive terminal and the negative terminal of the rectifier module BD1. The first capacitor C1 is a filter capacitor that makes the DC output of the rectifier module BD1 smooth and stable, thereby improving the working stability of the emergency light control circuit.

[0028] It can be understood that the emergency light control circuit also includes a first resistor R1 and a second resistor R2. The first end of the first resistor R1 is connected to the positive end of the rectifier module BD1, and the second end of the second resistor R2 is connected to the negative end of the rectifier module BD1. The second end of the first resistor R1 and the first end of the second resistor R2 are both connected to the sampling end PI of the control chip U1. The working current of the circuit can be obtained through the sampling end PI of the control chip U1.

[0029] It is understandable that the emergency light control circuit further includes a first diode D1 , the positive terminal of the first diode D1 is connected to the positive terminal of the rectifier module BD1 , and the negative terminal of the first diode D1 is connected to the input terminal of the LED module 200 .

[0030] It can be understood that the emergency light control circuit also includes a third resistor R3, a fourth resistor R4, and a fifth resistor R5. The first end of the third resistor R3 is connected to the positive terminal of the rectifier module BD1, the second end of the third resistor R3 is connected to the collector of the first transistor Q1, the fourth resistor R4 is connected between the base of the first transistor Q1 and the first control terminal PO of the control chip U1, the first end of the fifth resistor R5 is connected to the first control terminal PO of the control chip U1, and the second end of the fifth resistor R5 is connected to the negative terminal of the rectifier module BD1.

[0031] It can be understood that the emergency light control circuit also includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a second capacitor C2, the first end of the sixth resistor R6 is connected to the second control terminal EN1 of the control chip U1, the second end of the sixth resistor R6 is respectively connected to the base of the second transistor Q2 and the collector of the third transistor Q3, the first end of the seventh resistor R7 is respectively connected to the emitter of the second transistor Q2, the base of the third transistor Q3 and the first end of the eighth resistor R8, and the second end of the eighth resistor R8 is respectively connected to the third control terminal ALD of the control chip U1 and the first end of the second capacitor C2.

[0032] It should be noted that the emitter of the third transistor Q3 is also connected to the ground terminal of the emergency light control circuit, that is, the second end of the seventh resistor R7 and the second end of the second capacitor C2 are grounded.

[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An emergency light control circuit, characterized in that: include: A power input end, a first triode, a second triode, a third triode, a control chip and an LED module, wherein the power input end is respectively connected to the collector of the first triode and the input end of the LED module, the base of the first triode is connected to the first control end of the control chip, the output end of the LED module is connected to the collector of the second triode, the second control end of the control chip is respectively connected to the base of the second triode and the collector of the third triode, the emitter of the second triode is connected to the base of the third triode, wherein the LED module is composed of a plurality of LED lamps connected in series.

2. The emergency light control circuit according to claim 1, characterized in that: It also includes a rectifier module, the input end of the rectifier module is connected to the power input end, the positive end of the rectifier module is respectively connected to the collector of the first transistor and the input end of the LED module, and the negative end of the rectifier module is connected to the emitter of the first transistor.

3. The emergency light control circuit according to claim 2, characterized in that: It also includes a controllable precision voltage-stabilizing source, the cathode of which is respectively connected to the power supply end of the control chip and the positive end of the rectifier module, and the reference pole of which is respectively connected to the positive end of the rectifier module and the anode of the controllable precision voltage-stabilizing source.

4. The emergency light control circuit according to claim 2, characterized in that: It also includes a first capacitor, which is respectively connected between the positive terminal and the negative terminal of the rectifier module.

5. The emergency light control circuit according to claim 2, characterized in that: It also includes a first resistor and a second resistor, wherein the first end of the first resistor is connected to the positive terminal of the rectifier module, the second end of the second resistor is connected to the negative terminal of the rectifier module, and the second end of the first resistor and the first end of the second resistor are both connected to the sampling end of the control chip.

6. The emergency light control circuit according to claim 2, characterized in that: It also includes a first diode, wherein the positive terminal of the first diode is connected to the positive terminal of the rectifier module, and the negative terminal of the first diode is connected to the input terminal of the LED module.

7. The emergency light control circuit according to claim 2, characterized in that: It also includes a third resistor, a fourth resistor, and a fifth resistor. The first end of the third resistor is connected to the positive terminal of the rectifier module, the second end of the third resistor is connected to the collector of the first transistor, the fourth resistor is connected between the base of the first transistor and the first control terminal of the control chip, the first end of the fifth resistor is connected to the first control terminal of the control chip, and the second end of the fifth resistor is connected to the negative terminal of the rectifier module.

8. The emergency light control circuit according to claim 1, characterized in that: It also includes a sixth resistor, a seventh resistor, an eighth resistor and a second capacitor, the first end of the sixth resistor is connected to the second control end of the control chip, the second end of the sixth resistor is respectively connected to the base of the second transistor and the collector of the third transistor, the first end of the seventh resistor is respectively connected to the emitter of the second transistor, the base of the third transistor and the first end of the eighth resistor, and the second end of the eighth resistor is respectively connected to the third control end of the control chip and the first end of the second capacitor.

9. The emergency light control circuit according to claim 3, characterized in that: It also includes a ninth resistor, a tenth resistor and an eleventh resistor, the first end of the ninth resistor is connected to the positive terminal of the rectifier module, the second end of the ninth resistor is respectively connected to the controllable precision voltage-stabilizing source and the first end of the tenth resistor, the power supply end of the control chip is arranged between the connection point of the second end of the ninth resistor and the first end of the tenth resistor and the cathode end of the controllable precision voltage-stabilizing source, and the eleventh resistor is respectively connected to the reference pole and the anode of the controllable precision voltage-stabilizing source.

10. A lamp, characterized in that: The invention comprises the emergency light control circuit as claimed in any one of claims 1 to 9.

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