CN209982777U - LED drive circuit with dual-mode switching - Google Patents

LED drive circuit with dual-mode switching Download PDF

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Publication number
CN209982777U
CN209982777U CN201822190624.0U CN201822190624U CN209982777U CN 209982777 U CN209982777 U CN 209982777U CN 201822190624 U CN201822190624 U CN 201822190624U CN 209982777 U CN209982777 U CN 209982777U
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China
Prior art keywords
light source
switch
main control
current
control module
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CN201822190624.0U
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Inventor
许阳彬
肖根群
吴忠成
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Xiamen Yankon Energetic Lighting Co Ltd
Zhejiang Yankon Group Co Ltd
Zhejiang Yangguang Meijia Lighting Co Ltd
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Xiamen Yankon Energetic Lighting Co Ltd
Zhejiang Yankon Group Co Ltd
Zhejiang Yangguang Meijia Lighting Co Ltd
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Application filed by Xiamen Yankon Energetic Lighting Co Ltd, Zhejiang Yankon Group Co Ltd, Zhejiang Yangguang Meijia Lighting Co Ltd filed Critical Xiamen Yankon Energetic Lighting Co Ltd
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Abstract

The utility model provides a double-mode switching LED drive circuit, which comprises a main control module, a photosensitive module, a living body induction module, a mode selection module, a light source and a power supply module; the main control module is connected with the photosensitive module and the living body sensing module; the light source is connected between the mode selection module and the power supply module; the mode selection module comprises a first gear and a second gear; the first gear and the second gear are respectively connected with the light source; a switch is also arranged between the first gear and the light source and is also connected with the main control module; by applying the technical scheme, the function that one lamp has two lighting modes can be realized.

Description

LED drive circuit with dual-mode switching
Technical Field
The utility model relates to the field of lighting, specifically indicate LED drive circuit that double mode switches.
Background
The LED driving circuit in the prior art cannot realize the compatibility of a lamp and a flashlight switch mode while switching high-low gear lamplight in an induction mode. The infrared induction lamp used in the current market is only provided with an induction gear without a high-low gear switching mode, or is provided with a high-low gear light switching function without a flashlight switch small night lamp mode, and the manufacturing cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a LED drive circuit that double mode switches realizes that a lamps and lanterns have two kinds of lighting modes's function.
In order to solve the technical problem, the utility model provides a dual-mode switching LED drive circuit, a main control module, a photosensitive module, a living body induction module, a mode selection module, a light source and a power supply module; the main control module is connected with the photosensitive module and the living body sensing module; the light source is connected between the mode selection module and the power supply module; the mode selection module comprises a first gear and a second gear; the first gear and the second gear are respectively connected with the light source; a switch is also arranged between the first gear and the light source and is also connected with the main control module;
when the mode selection module is switched to a first gear, the second gear is disconnected, the main control module receives a starting signal, and the main control module sends a first trigger signal to the switch to enable the switch to be opened for a period of time and then closed; the light sensing module sends a standby signal to the main control module when not sensing a light signal, the main control module sends an opening signal to the main control module when sensing a living body signal after receiving the standby signal, the main control module sends a second trigger signal to the switch to open the switch, the light source is communicated with the first gear, and the light source is lighted;
when the mode selection module is shifted to a second gear, the first gear is disconnected, and the light source is lightened.
In a preferred embodiment, a first current limiting component is further connected between the first gear and the light source, the first current limiting component is connected with a current limiting switch, when the mode selection module is shifted to the first gear, the current limiting switch is turned on, the first current limiting component acts, and the brightness of the light source becomes low.
In a preferred embodiment, the first current limiting element includes a first current limiting resistor and a second current limiting resistor; the current limiting switch comprises a first current limiting switch and a second current limiting switch; two ends of the first current limiting resistor are respectively connected with the switch and the first current limiting switch, and two ends of the first current limiting switch are respectively connected with the first current limiting resistor and a power supply cathode; and two ends of the second current-limiting resistor are respectively connected with the switch and the second current-limiting switch, and two ends of the second current-limiting switch are respectively connected with the second current-limiting resistor and the negative electrode of the power supply.
In a preferred embodiment: turning on the first current-limiting switch and the second current-limiting switch, wherein the light source has a first brightness; turning on the first current-limiting switch and turning off the second current-limiting switch, wherein the light source has a second brightness; turning on the second current-limiting switch, and turning off the first current-limiting switch, wherein the light source has third brightness; the first brightness is higher than the second brightness and the third brightness.
In a preferred embodiment, a second current limiting element is further connected between the second stop and the light source, and the second current limiting element is connected with a third current limiting switch; when the mode selection module is shifted to a second gear, the third current limiting switch is turned on, the second current limiting component acts, and the brightness of the light source becomes low.
In a preferred embodiment, the second current limiting element is a third current limiting resistor, two ends of the third current limiting resistor are respectively connected to the light source and the third current limiting switch, and two ends of the third current limiting switch are respectively connected to the third current limiting resistor and a negative electrode of the power supply; and turning on the third current-limiting switch, wherein the light source has fourth brightness.
In a preferred embodiment, the main control module comprises a living body sensing interface, a photosensitive interface and a triggering interface; the living body induction module is specifically an infrared sensor, and the infrared sensor is connected with the living body induction interface.
In a preferred embodiment, the photosensitive module is a photodiode; the positive pole of the photosensitive diode is connected with the photosensitive interface, and the negative pole of the photosensitive diode is grounded.
In a preferred embodiment, the switch is a MOS transistor; the grid electrode of the MOS tube is connected with the trigger interface, the source electrode of the MOS tube is connected with the first current-limiting resistor and the second current-limiting resistor, and the drain electrode of the MOS tube is connected with the light source.
In a preferred embodiment: when the mode selection module is switched to a first gear, the second gear is disconnected, the main control module sends the first trigger signal to enable the MOS tube to be conducted for a period of time and then to be cut off, and the light source is turned on for a period of time and then is turned off;
the photosensitive diode sends a standby signal to the main control module when not sensing an optical signal, the main control module sends a turn-on signal to the main control module when sensing an infrared signal sent by a human body temperature difference after receiving the standby signal, the main control module sends a second trigger signal to the MOS tube to enable the MOS tube to be conducted, and the light source is turned on; or the photosensitive diode senses an optical signal, the photosensitive diode does not send a standby signal to the main control module, the main control module does not send a second trigger signal to the MOS tube, the MOS tube is not conducted, and the light source is not bright; or the photosensitive diode sends a standby signal to the main control module when not sensing an optical signal, after the main control module receives the standby signal, the infrared sensor does not sense an infrared signal sent by a human body temperature difference, the infrared sensor does not send a turn-on signal to the main control module, the main control module does not send a second trigger signal to the MOS tube, the MOS tube is not conducted, and the light source is not bright;
the mode selection module further comprises a third gear comprising a fourth switch; one end of the fourth switch is connected with the light source, the other end of the fourth switch is in a circuit break state, and when the mode selection module is shifted to a third gear, the light source is not bright.
Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:
the utility model provides a double-mode switching LED drive circuit, which realizes that one drive circuit enables a lamp to simultaneously have high-low gear light switching and lamp flashlight modes in an induction mode; the high and low brightness of the light source in the first gear is adjusted by controlling the opening and closing of the first current-limiting switch and the second current-limiting switch, and different brightness of the light source is controlled by setting different resistance values of the first current-limiting resistor and the second current-limiting resistor; if the flashlight mode is needed, the user only needs to change to the second gear, after the switch is turned off, the on or off of the light source is irrelevant to the main control module, and the light source can be controlled only by turning on or turning off the third current-limiting switch, so that the flashlight mode is realized.
Drawings
Fig. 1 is a schematic circuit diagram of a dual-mode switching LED driving circuit according to a preferred embodiment of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the detailed description.
The dual-mode switching LED driving circuit, referring to FIG. 1, includes a main control module U1, a photosensitive module, a living body sensing module, a mode selection module, a light source, and a power supply module; the main control module U1 is connected with the photosensitive module and the living body sensing module; the light source is connected between the mode selection module and the power supply module; the mode selection module comprises a first gear and a second gear; the first gear and the second gear are respectively connected with the light source; still be provided with a switch ware between first fender position and the light source, the switch ware is still connected host module U1. In this embodiment, the light sources are specifically four LED light sources connected in parallel; and a linear voltage regulator is connected between the main control module U1 and the power supply module to realize stable power supply.
The general principle is as follows: when the mode selection module is switched to the first gear, the second gear is disconnected, and the on and off of the light source are controlled by the main control module U1; the main control module U1 receives a start signal, and the main control module U1 sends a first trigger signal to the switch to enable the switch to be turned on for a period of time and then turned off; the light sensing module sends a standby signal to the main control module U1 when not sensing a light signal, the main control module U1 sends an opening signal to the main control module U1 when sensing a living body signal after receiving the standby signal, the main control module U1 sends a second trigger signal to the switch to open the switch, the light source is communicated with the first gear, and the light source is turned on; when the mode selection module is shifted to the second gear, the first gear is disconnected, the on and off of the light source is not controlled by the main control module U1, and the light source is on.
Particularly, still be connected with first current-limiting subassembly between first fender position and the light source, first current-limiting subassembly is connected with current-limiting switch, when mode selection module dials to first fender position, current-limiting switch opens, the effect of first current-limiting subassembly, light source luminance step-down.
More specifically, the first current limiting component includes a first current limiting resistor R9 and a second current limiting resistor R10; the current limiting switch comprises a first current limiting switch HIGH and a second current limiting switch LOW; two ends of the first current limiting resistor R9 are respectively connected with the switch and the first current limiting switch HIGH, and two ends of the first current limiting switch HIGH are respectively connected with the first current limiting resistor R9 and a power supply cathode; two ends of the second current limiting resistor R10 are respectively connected with the switch and the second current limiting switch LOW, and two ends of the second current limiting switch LOW are respectively connected with the second current limiting resistor R10 and the negative electrode of the power supply. Turning on the first current limit switch HIGH and the second current limit switch LOW, wherein the light source has a first brightness; turning on the first current limit switch HIGH, turning off the second current limit switch LOW, and enabling the light source to have second brightness; turning on the second current limit switch LOW, and turning off the first current limit switch HIGH, wherein the light source has a third brightness; the first brightness is higher than the second brightness and the third brightness. If the resistance value of the first current limiting resistor R9 is greater than that of the second current limiting resistor R10, the second brightness is lower than a third brightness; if the resistance value of the second current limiting resistor R10 is greater than that of the first current limiting resistor R9, the third brightness is lower than the second brightness; therefore, the switching of high-low gear lamplight of the lamp in the infrared induction mode is achieved.
Specifically, a second current limiting assembly is connected between the second gear and the light source, and the second current limiting assembly is connected with a third current limiting switch ON; when the mode selection module is shifted to a second gear, the third current limiting switch is turned ON, the second current limiting component acts, and the brightness of the light source becomes low. The second current limiting component is specifically a third current limiting resistor R11, two ends of the third current limiting resistor R11 are respectively connected to the light source and the third current limiting switch ON, and two ends of the third current limiting switch ON are respectively connected to the third current limiting resistor R11 and the negative electrode of the power supply; and turning ON the third current-limiting switch, wherein the light source has fourth brightness, and at the moment, the lamp is not controlled by the main control module U1, and the light source is turned ON when the third current-limiting switch is turned ON, so that the flashlight function of the lamp is realized.
Specifically, the main control module U1 includes a living body sensing interface, a photosensitive interface, and a trigger interface; the living body sensing module is specifically an infrared sensor PIR, and in this embodiment, the infrared sensor PIR is specifically an infrared receiver pyroelectric sensor; the infrared sensor PIR is connected with the living body induction interface. The photosensitive module is specifically a photosensitive diode Q2; the positive pole of the photosensitive diode Q2 is connected with the photosensitive interface, and the negative pole of the photosensitive diode Q2 is grounded. The switch is specifically a MOS tube Q1; the gate of the MOS transistor Q1 is connected to the trigger interface, the source of the MOS transistor Q1 is connected to the first current limiting resistor R9 and the second current limiting resistor R10, and the drain of the MOS transistor Q1 is connected to the light source. In this embodiment, the MOS transistor Q1 is specifically a PMOS transistor.
The specific working principle is as follows: when the mode selection module is switched to a first gear, the second gear is disconnected, the main control module U1 sends the first trigger signal to enable the MOS transistor Q1 to be switched on for a period of time and then be switched off, and the light source is turned off after being lighted for 15 s; the process is a warming-up process of the lamp, and the lamp is judged to be a good lamp by using the light source to be normally lighted for 15s, so that the lamp can be further used. The time of shining of light source is set for well before the product leaves the factory according to specific user's demand, can not prescribe a limit to with the specific time of shining of light source the utility model discloses a protection scope.
After the warming-up process is finished, starting a formal induction mode; because the lamp is used under the condition of insufficient light, the lamp does not need to be lighted under the condition of sufficient light; therefore, when the photodiode Q2 does not sense a light signal, a standby signal is sent to the main control module U1, and after the main control module U1 receives the standby signal, it indicates that the environment at this time is an environment with insufficient light, in a general use situation, only when a person is in a dark environment, a lamp needs to be lighted, and an unmanned dark environment does not need to be lighted, so that after the main control module U1 receives the standby signal, the infrared sensor PIR is required to sense an infrared signal sent by a temperature difference of a human body and send an opening signal to the main control module U1, so that the main control module U1 sends a second trigger signal to the MOS transistor Q1 to turn on the MOS transistor Q1, and the light source is lighted; at the moment, the brightness of the light source is adjusted by adjusting the on-off states of the first current limiting switch HIGH and the second current limiting switch LOW;
two situations that the lamp is not on when the lamp performance is normal and the mode selection module is shifted to the first gear are described as follows:
when the photodiode Q2 senses a light signal, it indicates that the lamp is in an environment with sufficient light, and a lighting tool is not needed, the photodiode Q2 does not send a standby signal to the main control module U1, the main control module U1 does not send a second trigger signal to the MOS transistor Q1, the MOS transistor Q1 is not turned on, and the light source is not lit.
(II) when the photodiode Q2 does not sense an optical signal, that is, the lamp is in a dark environment, the photodiode Q2 sends a standby signal to the main control module U1, after the main control module U1 receives the standby signal, the infrared sensor PIR does not sense an infrared signal sent by a human body temperature difference, that is, the lamp is in a dark environment but no person passes through the lamp, the lamp does not need to be lighted, so the infrared sensor PIR does not send a turn-on signal to the main control module U1, the main control module U1 does not send a second trigger signal to the MOS transistor Q1, the MOS transistor Q1 is not turned on, and the light source is not lighted.
In addition to the two gears, the mode selection module further comprises a third gear comprising a fourth switch; one end of the fourth switch is connected with the light source, the other end of the fourth switch is in open circuit, when the mode selection module is shifted to a third gear, the light source does not form a loop with other components in the circuit, and the light source is not bright.
The utility model provides a double-mode switching LED drive circuit, which realizes that one drive circuit enables a lamp to simultaneously have high-low gear light switching and lamp flashlight modes in an induction mode; the HIGH and LOW brightness of the light source in the first gear is adjusted by controlling the on and off of a first current limiting switch HIGH and a second current limiting switch LOW, and different brightness of the light source is controlled by setting different resistance values of a first current limiting resistor R9 and a second current limiting resistor R10; if the flashlight mode is needed, the user only needs to change to the second gear, after the switch is turned off, the ON or off of the light source is irrelevant to the main control module, and the light source can be controlled only by turning ON or turning off the third current-limiting switch, so that the flashlight mode is realized.
The above, only be the preferred embodiment of the present invention, but the design concept of the present invention is not limited to this, and any skilled person familiar with the technical field is in the technical scope disclosed in the present invention, and it is right to utilize this concept to perform insubstantial changes to the present invention, all belong to the act of infringing the protection scope of the present invention.

Claims (10)

1. The LED driving circuit with dual-mode switching is characterized by comprising a main control module, a photosensitive module, a living body induction module, a mode selection module, a light source and a power supply module; the main control module is connected with the photosensitive module and the living body sensing module; the light source is connected between the mode selection module and the power supply module; the mode selection module comprises a first gear and a second gear; the first gear and the second gear are respectively connected with the light source; a switch is also arranged between the first gear and the light source and is also connected with the main control module;
when the mode selection module is switched to a first gear, the second gear is disconnected, the main control module receives a starting signal, and the main control module sends a first trigger signal to the switch to enable the switch to be opened for a period of time and then closed; the light sensing module sends a standby signal to the main control module when not sensing a light signal, the main control module sends an opening signal to the main control module when sensing a living body signal after receiving the standby signal, the main control module sends a second trigger signal to the switch to open the switch, the light source is communicated with the first gear, and the light source is lighted;
when the mode selection module is shifted to a second gear, the first gear is disconnected, and the light source is lightened.
2. The dual-mode switching LED driving circuit according to claim 1, wherein a first current limiting component is further connected between the first gear and the light source, the first current limiting component is connected with a current limiting switch, when the mode selection module is shifted to the first gear, the current limiting switch is turned on, the first current limiting component acts, and the brightness of the light source becomes low.
3. The dual mode switching LED driver circuit of claim 2, wherein the first current limiting component comprises a first current limiting resistor and a second current limiting resistor; the current limiting switch comprises a first current limiting switch and a second current limiting switch; two ends of the first current limiting resistor are respectively connected with the switch and the first current limiting switch, and two ends of the first current limiting switch are respectively connected with the first current limiting resistor and a power supply cathode; and two ends of the second current-limiting resistor are respectively connected with the switch and the second current-limiting switch, and two ends of the second current-limiting switch are respectively connected with the second current-limiting resistor and the negative electrode of the power supply.
4. A dual mode switched LED driver circuit as claimed in claim 3, wherein: turning on the first current-limiting switch and the second current-limiting switch, wherein the light source has a first brightness; turning on the first current-limiting switch and turning off the second current-limiting switch, wherein the light source has a second brightness; turning on the second current-limiting switch, and turning off the first current-limiting switch, wherein the light source has third brightness; the first brightness is higher than the second brightness and the third brightness.
5. The dual-mode switching LED driving circuit according to claim 1, wherein a second current limiting component is further connected between the second stop and the light source, and the second current limiting component is connected to a third current limiting switch; when the mode selection module is shifted to a second gear, the third current limiting switch is turned on, the second current limiting component acts, and the brightness of the light source becomes low.
6. The dual-mode switching LED driving circuit according to claim 5, wherein the second current limiting element is a third current limiting resistor, two ends of the third current limiting resistor are respectively connected to the light source and the third current limiting switch, and two ends of the third current limiting switch are respectively connected to the third current limiting resistor and a negative electrode of the power source; and turning on the third current-limiting switch, wherein the light source has fourth brightness.
7. The dual-mode switching LED driving circuit according to claim 3, wherein the main control module comprises a living body sensing interface, a light sensing interface and a triggering interface; the living body induction module is specifically an infrared sensor, and the infrared sensor is connected with the living body induction interface.
8. The dual-mode switching LED driving circuit according to claim 7, wherein the light sensing module is a photodiode; the positive pole of the photosensitive diode is connected with the photosensitive interface, and the negative pole of the photosensitive diode is grounded.
9. A dual mode switched LED driver circuit as claimed in claim 8, wherein the switch is a MOS transistor; the grid electrode of the MOS tube is connected with the trigger interface, the source electrode of the MOS tube is connected with the first current-limiting resistor and the second current-limiting resistor, and the drain electrode of the MOS tube is connected with the light source.
10. A dual mode switched LED driver circuit as claimed in claim 9, wherein: when the mode selection module is switched to a first gear, the second gear is disconnected, the main control module sends the first trigger signal to enable the MOS tube to be conducted for a period of time and then to be cut off, and the light source is turned on for a period of time and then is turned off;
the photosensitive diode sends a standby signal to the main control module when not sensing an optical signal, the main control module sends a turn-on signal to the main control module when sensing an infrared signal sent by a human body temperature difference after receiving the standby signal, the main control module sends a second trigger signal to the MOS tube to enable the MOS tube to be conducted, and the light source is turned on; or the photosensitive diode senses an optical signal, the photosensitive diode does not send a standby signal to the main control module, the main control module does not send a second trigger signal to the MOS tube, the MOS tube is not conducted, and the light source is not bright; or the photosensitive diode sends a standby signal to the main control module when not sensing an optical signal, after the main control module receives the standby signal, the infrared sensor does not sense an infrared signal sent by a human body temperature difference, the infrared sensor does not send a turn-on signal to the main control module, the main control module does not send a second trigger signal to the MOS tube, the MOS tube is not conducted, and the light source is not bright;
the mode selection module further comprises a third gear comprising a fourth switch; one end of the fourth switch is connected with the light source, the other end of the fourth switch is in a circuit break state, and when the mode selection module is shifted to a third gear, the light source is not bright.
CN201822190624.0U 2018-12-25 2018-12-25 LED drive circuit with dual-mode switching Active CN209982777U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201822190624.0U CN209982777U (en) 2018-12-25 2018-12-25 LED drive circuit with dual-mode switching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201822190624.0U CN209982777U (en) 2018-12-25 2018-12-25 LED drive circuit with dual-mode switching

Publications (1)

Publication Number Publication Date
CN209982777U true CN209982777U (en) 2020-01-21

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Application Number Title Priority Date Filing Date
CN201822190624.0U Active CN209982777U (en) 2018-12-25 2018-12-25 LED drive circuit with dual-mode switching

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