CN209982776U - LED drive circuit with optional infrared induction function - Google Patents
LED drive circuit with optional infrared induction function Download PDFInfo
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- CN209982776U CN209982776U CN201822181742.5U CN201822181742U CN209982776U CN 209982776 U CN209982776 U CN 209982776U CN 201822181742 U CN201822181742 U CN 201822181742U CN 209982776 U CN209982776 U CN 209982776U
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Abstract
The utility model discloses an LED drive circuit with optional infrared induction function, which comprises a rectification filter circuit and a non-dimming LED drive circuit, the voltage stabilizing power supply circuit comprises a voltage stabilizing power supply circuit, an infrared induction circuit and a signal inversion processing circuit, wherein a voltage output end of a rectifying filter circuit is connected with a voltage input end of a non-dimming LED driving circuit, a voltage output end of the non-dimming LED driving circuit is connected with an LED lamp bead module, a voltage input end of the voltage stabilizing power supply circuit is connected with a voltage output end of the non-dimming LED driving circuit through a single-control induction switch, a voltage stabilizing power supply port of the voltage stabilizing power supply circuit is respectively connected with +12V voltage input ends of the infrared induction circuit and the signal inversion processing circuit, an induction signal output end of the infrared induction circuit is connected with an induction signal input end of the signal inversion processing circuit, and a VCC power supply control end of the signal inversion processing circuit is connected; the LED induction lamp has the advantages of low cost, multiple applicable topological modes and expanded application range.
Description
Technical Field
The utility model relates to a LED drive circuit especially relates to a but LED drive circuit of infrared induction function optional.
Background
The LED induction lamp is used as a new generation of intelligent green energy-saving lighting lamp and has been widely applied to occasions such as home furnishing, business and the like. At present, the two common LED induction lamps include an infrared induction LED induction lamp and an RF (radio frequency) microwave induction LED induction lamp, and the two LED induction lamps are switched between induction on/off states by detecting a moving state of a human body or an object.
At present, in order to meet or design an LED lamp product with an induction function in many factories, a dimming chip with an analog port or a digital port is often selected in the selection of an LED driving circuit, however, the dimming chip has high cost, many peripheral circuits and few applicable topological ways, so that the unit price of the finished LED driving power supply in the market is high. In addition, because the sensor in the LED lamp product with the sensing function is used for sensing environmental information to automatically adjust the on/off, dimming, color mixing and the like of the LED lamp product, the LED lamp product is generally used in places where human bodies often move, such as corridors, toilets, garages, warehouses, monitors and the like, and generally senses the human body movement to turn on the lamp and turn off the lamp in a delayed manner.
Disclosure of Invention
The utility model aims to solve the technical problem that a but LED drive circuit of infrared induction function apolegamy is provided, its with low costs, applicable topological mode is many, and uses its LED response lamp both to be applicable to the people and use in the place illumination of nevertheless often moving about, can be used to the place illumination of the often business turn over of people again and use, has enlarged the range of application of LED response lamp.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a but LED drive circuit that infrared induction function optional was joined in marriage which characterized in that: the LED lamp comprises a rectification filter circuit, a non-dimming LED drive circuit, a voltage-stabilizing power supply circuit, an infrared induction circuit and a signal inversion processing circuit, wherein the voltage input end of the rectification filter circuit is connected with commercial low-frequency alternating current, the voltage output end of the rectification filter circuit is connected with the voltage input end of the non-dimming LED drive circuit, the voltage output end of the non-dimming LED drive circuit is connected with an LED lamp bead module, the voltage input end of the voltage-stabilizing power supply circuit is connected with the voltage output end of the non-dimming LED drive circuit through a single-control induction switch, the voltage-stabilizing power supply port of the voltage-stabilizing power supply circuit is respectively connected with the +12V voltage input end of the infrared induction circuit and the +12V voltage input end of the signal inversion processing circuit, and the induction signal output end of the infrared induction circuit is connected with the induction signal input end of the signal inversion processing circuit, and the VCC power supply control end of the signal inversion processing circuit is connected with the VCC power supply input end of the non-dimming LED driving circuit.
When the single-control induction switch is switched off, the LED driving circuit has an infrared induction function, when the single-control induction switch is in an induction state, an induction signal output end of the infrared induction circuit outputs a high level, the voltage at the VCC power supply input end of the non-dimming LED driving circuit keeps an original amplitude value through the signal inversion processing circuit, the non-dimming LED driving circuit works normally, and LED lamp beads in the LED lamp bead module are on; when the LED lamp bead module is in a non-induction state, the induction signal output end of the infrared induction circuit outputs a low level, the voltage at the VCC power supply input end of the non-dimming LED driving circuit is pulled down through the signal inversion processing circuit, the non-dimming LED driving circuit does not work, and the LED lamp beads in the LED lamp bead module are turned off;
when the single-control inductive switch is switched off, the LED driving circuit does not have an infrared induction function, the voltage-stabilizing power supply circuit, the infrared induction circuit and the signal inversion processing circuit do not work, the voltage at the VCC power supply input end of the non-dimming LED driving circuit keeps an original amplitude, the non-dimming LED driving circuit works normally, and the LED lamp beads in the LED lamp bead module are normally on.
The LED driving circuit is characterized in that a photosensitive sensor and a single-control light-operated switch are arranged in the infrared sensing circuit in series, and when the single-control sensing switch is closed, if the single-control light-operated switch is closed, the LED driving circuit also has a light control function; if the single-control light control switch is switched off, the LED driving circuit does not have the light control function. By additionally arranging the photosensitive sensor and the single-control light control switch, the LED driving circuit can only work in a night mode when the single-control light control switch is switched off, namely, the LED driving circuit enters an induction state when light is dark or at night, and the LED driving circuit works in an all-day mode when the single-control light control switch is switched off, namely, the LED driving circuit is in the induction state in the day and at night.
The signal inversion processing circuit consists of a first NPN triode, a second NPN triode, a first base resistor, a first collector resistor, a second base resistor and a second collector resistor, wherein one end of the first base resistor is used as an induction signal input end of the signal inversion processing circuit and is connected with an induction signal output end of the induction circuit, the other end of the first base resistor is connected with a base electrode of the first NPN triode, a collector electrode of the first NPN triode is respectively connected with one end of the first collector resistor and one end of the second base resistor, the other end of the first collector resistor is used as a +12V voltage input end of the signal inversion processing circuit and is connected with a voltage stabilizing port of the voltage stabilizing power supply circuit, and the other end of the second base resistor is connected with a base electrode of the second NPN triode, the collector of the second NPN triode is connected to one end of the second collector resistor, the other end of the second collector resistor is used as a VCC power supply control end of the signal inversion processing circuit and is connected to a VCC power supply input end of the non-dimming LED driving circuit, and the emitter of the first NPN triode and the emitter of the second NPN triode are both grounded. The signal inversion processing circuit is simple in structure, the first NPN triode and the second NPN triode form a composite switching circuit, the second NPN triode is cut off and disconnected when the first NPN triode is in saturated conduction, and the second NPN triode is in saturated conduction when the first NPN triode is cut off and disconnected.
When the single-control induction switch is closed, a +12V voltage input end of the signal inversion processing circuit is connected with a +12V voltage to supply power to a base electrode of the second NPN triode, when the single-control induction switch is in an induction state, an induction signal output end of the induction circuit outputs a +3.3V high level, the +3.3V high level is input to a base electrode of the first NPN triode through the first base electrode resistor, the first NPN triode is in saturated conduction, the +12V voltage supplied to the base electrode of the second NPN triode is pulled down, the second NPN triode is cut off, at the moment, the voltage at a VCC power supply input end of the non-dimming LED driving circuit keeps the original amplitude value, the non-dimming LED driving circuit works normally, and an LED lamp in the LED lamp bead module is on; when the LED lamp is in a non-induction state, the induction signal output end of the induction circuit outputs 0V low level, the base of the first NPN triode has no base current, the first NPN triode is cut off and disconnected, the +12V voltage output by the voltage stabilizing power supply port of the voltage stabilizing power supply circuit normally supplies power to the base of the second NPN triode, the second NPN triode is in saturated conduction, the voltage at the VCC power supply input end of the non-dimming LED driving circuit is pulled down at the moment, the non-dimming LED driving circuit does not work, and the LED lamp beads in the LED lamp bead module are turned off.
Compared with the prior art, the utility model has the advantages of:
1) the LED driving circuit adopts a non-dimming LED driving circuit, the cost of a non-dimming chip in the non-dimming LED driving circuit is low, the non-dimming chips of various types can be selected, and the applicable topological mode is multiple.
2) The LED driving circuit adopts a non-dimming LED driving circuit and combines a voltage-stabilizing power supply circuit, an infrared sensing circuit and a signal inversion processing circuit, so that an LED driving power supply with an infrared sensing function can be obtained by adopting a non-dimming chip.
3) This LED drive circuit is through adding a single control inductive switch between the voltage input end at steady voltage supply circuit and the voltage output end of LED drive circuit of adjusting luminance, make when single control inductive switch closes this LED drive circuit have the infrared induction function, and this LED drive circuit does not have the infrared induction function when single control inductive switch disconnection, can freely match whether opening of infrared induction function through single control inductive switch promptly, thereby make the LED response lamp that uses this LED drive circuit both be applicable to people but the place illumination of not frequent activity uses, can be used to the place illumination of people's frequent activity business turn over again and use, the range of application of LED response lamp has been enlarged.
Drawings
Fig. 1 is a block diagram of the LED driving circuit of the present invention;
fig. 2 is a circuit diagram of an LED driving circuit according to the present invention;
fig. 3 is a circuit diagram of a signal inversion processing circuit in the LED driving circuit according to the present invention;
fig. 4a is a working mode state of a single-control inductive switch in the LED driving circuit of the present invention;
fig. 4b shows the operating mode state of the single-control light-operated switch in the LED driving circuit of the present invention
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The utility model provides a but LED drive circuit of infrared induction function option, as shown in fig. 1 and fig. 2, it includes rectifier filter circuit 1, non-dimming LED drive circuit 2, steady voltage supply circuit 3, infrared induction circuit 4 and signal reversal processing circuit 5, city low frequency alternating current is gone into to rectifier filter circuit 1's voltage input end, rectifier filter circuit 1's voltage output end is connected with non-dimming LED drive circuit 2's voltage input end, non-dimming LED drive circuit 2's voltage output end is connected with LED lamp pearl module 6, steady voltage supply circuit 3's voltage input end is connected through single control inductive switch SW1 and non-dimming LED drive circuit 2's voltage output end, steady voltage supply circuit 3's steady voltage supply mouth is connected with infrared induction circuit 4 +12V voltage input end and signal reversal processing circuit 5 +12V voltage input end respectively, infrared induction circuit 4's induction signal output end and signal reversal processing circuit 5's induction signal input end And the VCC power supply control end of the signal inversion processing circuit 5 is connected with the VCC power supply input end of the non-dimming LED drive circuit 2. As shown in fig. 4a, when the single-control inductive switch SW1 is closed, the LED driving circuit has an infrared induction function, when the LED driving circuit is in an induction state, the induction signal output end of the infrared induction circuit 4 outputs a high level, the voltage at the VCC power supply input end of the non-dimming LED driving circuit 2 is kept at the original amplitude value through the signal inversion processing circuit 5, the non-dimming LED driving circuit 2 normally operates, and the LED lamp in the LED lamp bead module 6 is on; when the LED lamp is in a non-induction state, the induction signal output end of the infrared induction circuit 4 outputs a low level, the voltage at the VCC power supply input end of the non-dimming LED driving circuit 2 is pulled down through the signal inversion processing circuit 5, the non-dimming LED driving circuit 2 does not work, and the LED lamp in the LED lamp bead module 6 is turned off; when single accuse inductive switch SW1 disconnection, this LED drive circuit does not have the infrared induction function, and steady voltage supply circuit 3, infrared induction circuit 4 and signal reversal processing circuit 5 are all not worked, and the voltage of LED drive circuit 2's that adjusts luminance VCC power input end department keeps original amplitude, and LED drive circuit 2 normal work is adjusted luminance to non-, and LED lamp pearl in the LED lamp pearl module 6 is bright often.
Preferably, the rectification filter circuit 1, the non-dimming LED drive circuit 2, the voltage-stabilizing power supply circuit 3 and the infrared induction circuit 4 all adopt the prior art; the connection of the rectification filter circuit 1 and the non-dimming LED drive circuit 2 and the connection of the non-dimming LED drive circuit 2 and the LED lamp bead module 6 adopt the existing connection mode; the voltage input end of the voltage-stabilizing power supply circuit 3 is connected with the voltage output end of the non-dimming LED drive circuit 2 through the single-control inductive switch SW1, in fig. 2, one end of a resistor R15 in the voltage-stabilizing power supply circuit 3 is connected with one end of a capacitor C5 in the non-dimming LED driving circuit 2, the other end of a resistor R15 in the voltage-stabilizing power supply circuit 3 is connected with one end of a resistor R16, the other end of the resistor R16 is connected with one end of a single-control inductive switch SW1, the other end of the single-control inductive switch SW1 is connected with a voltage-stabilizing power supply port of the voltage-stabilizing power supply circuit 3, the voltage-stabilizing power supply port of the voltage-stabilizing power supply circuit 3 is respectively connected with a +12V voltage input end of the infrared induction circuit 4 and a +12V voltage input end of the signal inversion, in fig. 2, the regulated power supply port of the regulated power supply circuit 3 is respectively connected to the VCC port of the sensing chip U2 in the infrared sensing circuit 4 and one end of the first collector resistor Rc1 in the signal inversion processing circuit 5; the sensing signal output end of the infrared sensing circuit 4 is the OUT port of the sensing chip U2, and is connected to one end of the first base resistor Rb1 in the signal inversion processing circuit 5.
Preferably, referring to fig. 2, a photosensor CDS and a single-control light-operated switch SW2 connected in series are arranged in the infrared sensing circuit 4, a VC port of a sensing chip U2 in the infrared sensing circuit 4 is connected with one end of a single-control light-operated switch SW2 through the photosensor CDS, and the other end of the single-control light-operated switch SW2 is grounded. As shown in fig. 2 and 4b, when the single-control inductive switch SW1 is closed, if the single-control optical switch SW2 is closed, the photosensitive sensor CDS is connected with ground, the VC port of the inductive chip U2 is affected by illumination of the photosensitive sensor CDS, the VDD power supply supplies power to the VC port of the inductive chip U2 through an RC circuit (formed by a resistor R13 and a capacitor C15), and illumination detection is performed, and the LED driving circuit has an optical control function and operates in a night mode (when ambient illumination is detected through the photosensitive sensor CDS, and when light is dark or the night reaches an illumination threshold); if the single-control light-operated switch SW2 is switched off, the photosensitive sensor CDS is switched off from the ground, the VC port of the sensing chip U2 is not influenced by the illumination of the photosensitive sensor CDS, the VDD power supply supplies power to the VC port of the sensing chip U2 through an RC circuit (formed by a resistor R13 and a capacitor C15), the illumination detection is not carried out, the LED driving circuit does not have a light-operated function, and the LED driving circuit works in an all-day mode. By additionally arranging the photosensitive sensor CDS and the single-control light control switch SW2, when the single-control light control switch SW2 is closed, the LED drive circuit only works in a night mode, namely, the LED drive circuit enters a sensing state when the light is dark or at night, and when the single-control light control switch SW2 is opened, the LED drive circuit works in an all-day mode, namely, the LED drive circuit is in the sensing state in both day and night.
Preferably, as shown in fig. 2 and 3, the signal inversion processing circuit 5 comprises a first NPN triode Q1, a second NPN triode Q2, a first base resistor Rb1, a first collector resistor Rc1, a second base resistor Rb2 and a second collector resistor Rc2, one end of the first base resistor Rb1 is connected to the sensing signal input end of the sensing circuit 4 as the sensing signal input end of the signal inversion processing circuit 5, the other end of the first base resistor Rb1 is connected to the base of the first NPN triode Q1, the collector of the first NPN triode Q1 is connected to one end of the first collector resistor Rc1 and one end of the second base resistor Rb2, the other end of the first collector resistor Rc1 is connected to the regulated power supply port of the regulated power supply circuit 3 as the +12V voltage input end of the signal inversion processing circuit 5, the other end of the second base resistor Rb2 is connected to the base of the second NPN triode Q2, the collector of the second NPN triode Q2 is connected to one end of a second collector resistor Rc2, and the other end of the second collector resistor Rc2 is connected as a VCC power supply control terminal of the signal inversion processing circuit 5 to the VCC power supply input terminal of the non-dimming LED driving circuit 2, that is, to the VCC port of the non-dimming chip U1 in the non-dimming LED driving circuit 2, and the emitter of the first NPN triode Q1 and the emitter of the second NPN triode Q2 are both grounded. When the single-control sensing switch SW1 is closed, the +12V voltage input terminal of the signal inversion processing circuit 5 is connected to +12V voltage to supply power to the base of the second NPN transistor Q2, when the sensing circuit is in a sensing state, the sensing signal output terminal of the sensing circuit 4 outputs +3.3V high level, the +3.3V high level is input to the base of the first NPN transistor Q1 through the first base resistor Rb1, the first NPN transistor Q1 is in a saturation state (since the first base resistor Rb1 has base current flowing, the collector of the first NPN transistor Q1 is caused to flow a larger amplified current, the first NPN transistor Q1 operates in a saturation region), the +12V voltage supplied to the base of the second NPN transistor Q2 is pulled low because the first NPN transistor Q1 is on, the second NPN transistor Q2 is turned off because there is not enough base voltage (the second NPN transistor Q2 operates in a VCC driving region), and the non-dimming driving voltage of the second NPN transistor Q2 maintains the original input voltage at this time, the non-dimming LED driving circuit 2 works normally, and the LED lamp beads in the LED lamp bead module 6 are on; when the LED lamp is in a non-induction state, the induction signal output end of the induction circuit 4 outputs a low level of 0V, the base of the first NPN triode Q1 has no base current, the first NPN triode Q1 is turned off, the +12V voltage output by the voltage stabilizing power supply port of the voltage stabilizing power supply circuit 3 normally supplies power to the base of the second NPN triode Q2, the second NPN triode Q2 is in saturated conduction, at this time, the voltage at the VCC power supply input end of the non-dimming LED driving circuit 2 is pulled down (lower than the lowest working voltage of the non-dimming LED driving circuit 2), the non-dimming LED driving circuit 2 does not work, and the LED lamp in the LED lamp module 6 is turned off.
Claims (5)
1. The utility model provides a but LED drive circuit that infrared induction function optional was joined in marriage which characterized in that: the LED lamp comprises a rectification filter circuit, a non-dimming LED drive circuit, a voltage-stabilizing power supply circuit, an infrared induction circuit and a signal inversion processing circuit, wherein the voltage input end of the rectification filter circuit is connected with commercial low-frequency alternating current, the voltage output end of the rectification filter circuit is connected with the voltage input end of the non-dimming LED drive circuit, the voltage output end of the non-dimming LED drive circuit is connected with an LED lamp bead module, the voltage input end of the voltage-stabilizing power supply circuit is connected with the voltage output end of the non-dimming LED drive circuit through a single-control induction switch, the voltage-stabilizing power supply port of the voltage-stabilizing power supply circuit is respectively connected with the +12V voltage input end of the infrared induction circuit and the +12V voltage input end of the signal inversion processing circuit, and the induction signal output end of the infrared induction circuit is connected with the induction signal input end of the signal inversion processing circuit, and the VCC power supply control end of the signal inversion processing circuit is connected with the VCC power supply input end of the non-dimming LED driving circuit.
2. The LED driving circuit with optional infrared sensing function according to claim 1, wherein: when the single-control induction switch is switched off, the LED driving circuit has an infrared induction function, when the single-control induction switch is in an induction state, an induction signal output end of the infrared induction circuit outputs a high level, the voltage at the VCC power supply input end of the non-dimming LED driving circuit keeps an original amplitude value through the signal inversion processing circuit, the non-dimming LED driving circuit works normally, and LED lamp beads in the LED lamp bead module are on; when the LED lamp bead module is in a non-induction state, the induction signal output end of the infrared induction circuit outputs a low level, the voltage at the VCC power supply input end of the non-dimming LED driving circuit is pulled down through the signal inversion processing circuit, the non-dimming LED driving circuit does not work, and the LED lamp beads in the LED lamp bead module are turned off;
when the single-control inductive switch is switched off, the LED driving circuit does not have an infrared induction function, the voltage-stabilizing power supply circuit, the infrared induction circuit and the signal inversion processing circuit do not work, the voltage at the VCC power supply input end of the non-dimming LED driving circuit keeps an original amplitude, the non-dimming LED driving circuit works normally, and the LED lamp beads in the LED lamp bead module are normally on.
3. The LED driving circuit with optional infrared sensing function according to claim 2, wherein: the LED driving circuit is characterized in that a photosensitive sensor and a single-control light-operated switch are arranged in the infrared sensing circuit in series, and when the single-control sensing switch is closed, if the single-control light-operated switch is closed, the LED driving circuit also has a light control function; if the single-control light control switch is switched off, the LED driving circuit does not have the light control function.
4. An LED driving circuit with optional infrared sensing function according to claim 2 or 3, wherein: the signal inversion processing circuit consists of a first NPN triode, a second NPN triode, a first base resistor, a first collector resistor, a second base resistor and a second collector resistor, wherein one end of the first base resistor is used as an induction signal input end of the signal inversion processing circuit and is connected with an induction signal output end of the induction circuit, the other end of the first base resistor is connected with a base electrode of the first NPN triode, a collector electrode of the first NPN triode is respectively connected with one end of the first collector resistor and one end of the second base resistor, the other end of the first collector resistor is used as a +12V voltage input end of the signal inversion processing circuit and is connected with a voltage stabilizing port of the voltage stabilizing power supply circuit, and the other end of the second base resistor is connected with a base electrode of the second NPN triode, the collector of the second NPN triode is connected to one end of the second collector resistor, the other end of the second collector resistor is used as a VCC power supply control end of the signal inversion processing circuit and is connected to a VCC power supply input end of the non-dimming LED driving circuit, and the emitter of the first NPN triode and the emitter of the second NPN triode are both grounded.
5. The LED driving circuit with optional infrared sensing function according to claim 4, wherein: when the single-control induction switch is closed, a +12V voltage input end of the signal inversion processing circuit is connected with a +12V voltage to supply power to a base electrode of the second NPN triode, when the single-control induction switch is in an induction state, an induction signal output end of the induction circuit outputs a +3.3V high level, the +3.3V high level is input to a base electrode of the first NPN triode through the first base electrode resistor, the first NPN triode is in saturated conduction, the +12V voltage supplied to the base electrode of the second NPN triode is pulled down, the second NPN triode is cut off, at the moment, the voltage at a VCC power supply input end of the non-dimming LED driving circuit keeps the original amplitude value, the non-dimming LED driving circuit works normally, and an LED lamp in the LED lamp bead module is on; when the LED lamp is in a non-induction state, the induction signal output end of the induction circuit outputs 0V low level, the base of the first NPN triode has no base current, the first NPN triode is cut off and disconnected, the +12V voltage output by the voltage stabilizing power supply port of the voltage stabilizing power supply circuit normally supplies power to the base of the second NPN triode, the second NPN triode is in saturated conduction, the voltage at the VCC power supply input end of the non-dimming LED driving circuit is pulled down at the moment, the non-dimming LED driving circuit does not work, and the LED lamp beads in the LED lamp bead module are turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822181742.5U CN209982776U (en) | 2018-12-25 | 2018-12-25 | LED drive circuit with optional infrared induction function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822181742.5U CN209982776U (en) | 2018-12-25 | 2018-12-25 | LED drive circuit with optional infrared induction function |
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| CN209982776U true CN209982776U (en) | 2020-01-21 |
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| CN201822181742.5U Active CN209982776U (en) | 2018-12-25 | 2018-12-25 | LED drive circuit with optional infrared induction function |
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