CN211240202U - Light detection circuit of LED lamp and LED lamp - Google Patents
Light detection circuit of LED lamp and LED lamp Download PDFInfo
- Publication number
- CN211240202U CN211240202U CN201922302000.8U CN201922302000U CN211240202U CN 211240202 U CN211240202 U CN 211240202U CN 201922302000 U CN201922302000 U CN 201922302000U CN 211240202 U CN211240202 U CN 211240202U
- Authority
- CN
- China
- Prior art keywords
- light
- module
- signal
- led lamp
- emitting module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a light detection circuit of an LED lamp and the LED lamp, wherein the light detection circuit comprises a light detection module, a control module and a light emitting module; the light detection module is used for detecting an ambient light signal and a light signal of the light emitting module, and outputting a corresponding electric signal to the control module according to the light signal of the light emitting module and the ambient light signal or the ambient light signal; the control module is used for controlling the light emitting module to be turned off when the electric signal in a preset time is greater than a preset signal; when the electric signal in a preset time is smaller than a preset signal, controlling the light-emitting module to be lightened; and when the electric signal in the preset time is periodically smaller than the preset signal along with the input line voltage, controlling the light-emitting module to be continuously lightened, and effectively controlling the LED lamp by accurately distinguishing an ambient light signal and a light signal of the LED lamp so as to save energy consumption.
Description
Technical Field
The utility model relates to a LED technical field that adjusts luminance, in particular to light detection circuit and LED lamp of LED lamp.
Background
In the application of controlling the state of the LED lamp by detecting ambient light through the light sensor, a commonly adopted method is to avoid the interference of light emitted by the LED lamp per se to the light sensor by utilizing a physical light-shading method, the light sensor needs to be placed in a hole formed in the LED lamp shell, the hole forming position cannot be irradiated by the light emitted by the LED lamp per se, so as to avoid the interference on the detection of the light sensor, the hole forming position also needs to be subjected to waterproof treatment, the complexity and the production cost of lamp production and processing are increased, the interference of the light emitted by the light sensor per se can only be avoided, the light emitted by the LED lamps of the same type beside can influence the detection of the light sensor, the detection result is wrong, the effective control on the LED lamp cannot be realized, and the waste of electric energy is caused.
Thus, the prior art has yet to be improved and enhanced.
SUMMERY OF THE UTILITY MODEL
In view of the deficiencies of the prior art, an object of the utility model is to provide a light detection circuitry and LED lamp of LED lamp, can effectively distinguish ambient light and LED light, and then realize the effective control to the LED lamp to practice thrift the energy consumption.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a light detection circuit of an LED lamp comprises a light detection module, a control module and a light emitting module; the light detection module is used for detecting an ambient light signal and a light signal of the light emitting module, and outputting a corresponding electric signal to the control module according to the light signal of the light emitting module and the ambient light signal or the ambient light signal; the control module is used for controlling the light emitting module to be turned off when the electric signal in a preset time is greater than a preset signal; when the electric signal in a preset time is smaller than a preset signal, controlling the light-emitting module to be lightened; and when the electric signal in the preset time is periodically smaller than the preset signal along with the input line voltage, controlling the light-emitting module to continuously light.
In the light detection circuit of the LED lamp, the light detection module is specifically configured to output the electrical signal to the control module according to the ambient light signal when the light emitting module is turned off; when the light emitting module is lightened, an electric signal is output to the control module according to the environment light signal and the light signal of the light emitting module.
The light detection circuit of the LED lamp further comprises a low-voltage direct-current power supply module, and the low-voltage direct-current power supply module provides working voltage for the control module and the light detection module according to the line voltage.
In the light detection circuit of the LED lamp, the light detection module comprises a photosensitive device and a first resistor; one end of the photosensitive device is connected with the low-voltage direct current power supply module and the control module; the other end of the photosensitive device is connected with one end of the first resistor and the control module, and the other end of the first resistor is grounded.
In the light detection circuit of the LED lamp, the control module comprises a control chip, a No. 1 pin of the control chip is connected with one end of the photosensitive device and the low-voltage direct-current power supply module, a No. 2 pin of the control chip is connected with the other end of the photosensitive device, a No. 3 pin of the control chip is connected with the light emitting module, and a No. 4 pin of the control chip is grounded.
In the light detection circuit of the LED lamp, the control module comprises a comparator and a judgment unit; the inverting input end of the comparator is connected with the optical detection module; the positive phase input end of the comparator is connected with the reference voltage input end, the output end of the comparator is connected with the judging unit, and the judging unit is also connected with the light-emitting module.
In the light detection circuit of the LED lamp, the light emitting module comprises an LED lamp string, an operational amplifier, a second resistor and an MOS (metal oxide semiconductor) tube; the input end of the LED lamp string is connected with the voltage input end, the output end of the LED lamp string is connected with the drain electrode of the MOS tube, the source electrode of the MOS tube is connected with one end of the second resistor and the inverting input end of the operational amplifier, the positive phase input end of the operational amplifier is connected with the control module, and one end of the second resistor is grounded.
In the light detection circuit of the LED lamp, the low-voltage direct current power supply module comprises a third resistor, a capacitor and a voltage stabilizing diode; one end of the third resistor is connected with a line voltage input end, the other end of the third resistor is connected with one end of the capacitor and the negative electrode of the voltage stabilizing diode, and the positive electrode of the voltage stabilizing diode and the other end of the capacitor are grounded.
An LED lamp comprising a light detection circuit as described above.
Compared with the prior art, the light detection circuit of the LED lamp and the LED lamp provided by the utility model have the advantages that the light detection circuit comprises a light detection module, a control module and a light emitting module; the light detection module is used for detecting an ambient light signal and a light signal of the light emitting module, and outputting a corresponding electric signal to the control module according to the light signal of the light emitting module and the ambient light signal or the ambient light signal; the control module is used for controlling the light emitting module to be turned off when the electric signal in a preset time is greater than a preset signal; when the electric signal in a preset time is smaller than a preset signal, controlling the light-emitting module to be lightened; and when the electric signal in the preset time is periodically smaller than the preset signal along with the input line voltage, controlling the light-emitting module to be continuously lightened, and effectively controlling the LED lamp by accurately distinguishing an ambient light signal and a light signal of the LED lamp so as to save energy consumption.
Drawings
Fig. 1 is a block diagram of a light detection circuit of an LED lamp according to the present invention;
fig. 2 is a schematic circuit diagram of a first embodiment of a light detection circuit of an LED lamp provided by the present invention;
fig. 3 is a schematic circuit diagram of a second embodiment of the light detection circuit of the LED lamp provided by the present invention;
fig. 4 is a schematic circuit diagram of a third embodiment of the light detection circuit of the LED lamp provided by the present invention.
Detailed Description
An object of the utility model is to provide a light detection circuitry and LED lamp of LED lamp can effectively distinguish environment light and LED light, and then realize the effective control to the LED lamp.
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a light detection circuit of an LED lamp, which includes a rectifier module 100, a light detection module 200, a control module 300, and a light emitting module 400; the input end of the rectification module 100 is connected with an alternating current power supply, and the output end of the rectification module 100 is connected with the light emitting module 400, the control module 300 and the light detection module 200; the light detection module 200 is further connected to the control module 300, and the control module 300 is further connected to the light emitting module 400, wherein the rectification module 100 is a conventional technology, and therefore, detailed structure thereof is not described in detail.
In specific implementation, the rectifying module 100 rectifies the ac power input by the ac power supply and outputs an output line voltage to the light emitting module 400 and the light detecting module 200, where the light detecting module 200 is configured to detect an ambient light signal and an optical signal of the light emitting module 400, and output a corresponding electrical signal to the control module 300 according to the optical signal of the light emitting module 400 and the ambient light signal or the ambient light signal; the control module 300 is configured to output a corresponding dimming signal to the light emitting module 400 when the electrical signal within a preset time is greater than a preset signal, so as to control the light emitting module 400 to turn off; if the electrical signal within the preset time is smaller than the preset signal, outputting a corresponding dimming signal to the light emitting module 400 to control the light emitting module 400 to be turned on; and when the electrical signal within a preset time is periodically smaller than the preset signal along with the input line voltage, controlling the light emitting module 400 to be continuously turned on, thereby outputting a corresponding electrical signal according to different optical signals through the light detection module 200, and realizing effective control of the LED lamp.
Further, the light detection module 200 is specifically configured to output the electrical signal to the control module 300 according to the ambient light signal when the light emitting module 400 is turned off; when the light emitting module 400 is turned on, an electrical signal is output to the control module 300 according to the ambient light signal and the light signal of the light emitting module 400, and then different dimming signals are obtained according to different electrical signals, so as to complete effective control of the working state of the light emitting module 400.
Specifically, when the ambient light is strong, the light emitting module 400 is turned off by the dimming signal, and the light emitting module 400 is in a non-light emitting state, so that the light detecting module 200 only detects the ambient light signal and outputs a corresponding electrical signal according to the current ambient light intensity; when the ambient illumination intensity is low, if the light emitting module 400 is not turned off by the dimming signal, the light emitting module 400 periodically emits light and does not emit light along with the line voltage, specifically, when the voltage of the light emitting module 400 is greater than the line voltage, the light emitting module 400 does not emit light, and at this time, the light detecting module 200 still outputs the electrical signal according to the current ambient light signal; when the voltage of the light emitting module 400 is smaller than the line voltage, the light emitting module 400 emits light correspondingly, and at this time, the electrical signal output by the light detecting module 200 is a mixture of the light signal corresponding to the light emitting module 400 emitting light itself and the current ambient light signal, so that the ambient light and the light emitting module 400 emitting light themselves are effectively detected by the light detecting module 200, and a corresponding dimming signal is output, so as to complete effective control of the working state of the light emitting module 400, wherein the dimming signal in this embodiment is a PWM dimming signal.
Further, please continue to refer to fig. 1, the light detection circuit of the LED lamp further includes a low voltage dc power supply module 500, wherein the low voltage dc power supply module 500 is connected to the rectifying module 100, the light detection module 200 and the control module 300; the low-voltage dc power supply module 500 provides a working voltage to the control module 300 and the light detection module 200 according to the line voltage, so as to ensure stable and effective operation of the light detection module 200 and the control module 300.
Further, referring to fig. 2, in the first embodiment of the present invention, the light detection module 200 includes a photosensitive device LS and a first resistor R1; one end of the photosensitive device LS is connected to the low-voltage dc power supply module 500 and the control module 300; the other end of the photosensitive device LS is connected to one end of the first resistor R1 and the control module 300, and the other end of the first resistor R1 is grounded, wherein in this embodiment, the photosensitive device LS is a photodiode, and the resistance of the photodiode decreases with the increase of the illumination intensity, so that the effective detection of light is realized; of course, the photosensitive device LS may be a photo resistor or a photo transistor, and the like, which is not limited in this embodiment.
Further, the control module 300 includes a control chip U1, the 1 st pin of the control chip U1 is connected to one end of the photosensitive device LS and the low-voltage dc power supply module 500, the 2 nd pin of the control chip U1 is connected to the other end of the photosensitive device LS, the 3 rd pin of the control chip U1 is connected to the light emitting module 400, and the 4 th pin of the control chip U1 is grounded, wherein the control chip U1 is SDS7322H, but of course, in other embodiments, a control chip U1 having the same function may be selected, which is not limited in this embodiment.
After the control module 300 is powered on, the control chip U1 receives the electrical signal output by the light detection module 200 through the 2 nd pin, and the control chip U1 determines that if the preset time is greater than or equal to one line voltage cycle time within the preset time and the electrical signal is greater than the preset signal all the time, it indicates that the ambient light illumination is high, and the light emitting module 400 is not required to emit light, so that the control chip U1 outputs a corresponding dimming signal through the 3 rd pin to make the light emitting module 400 not emit light; in this embodiment, the preset signal is a preset voltage; when the electrical signal is always smaller than the preset voltage within the preset time and the light emitting module 400 is turned off by the dimming signal, it indicates that the ambient light is low and the light emitting module 400 is required to assist in lighting, and then the 3 rd pin of the control chip U1 outputs the corresponding dimming signal to control the light emitting module 400 to light up; when the electric signal is periodically smaller than the preset signal along with the line voltage within the preset time, it indicates that the light emitting module 400 is not turned off by the dimming signal and the ambient light illuminance is low, the light emitting module 400 needs to be continuously turned on to assist in lighting, and then the 3 rd pin of the control chip U1 outputs a corresponding dimming signal to control the light emitting module 400 to be continuously turned on; through judging the change of the signal of telecommunication in the time of predetermineeing, accurate differentiation environment light signal with the light emitting module 400's self light signal has realized controlling daytime illuminance is high light emitting module 400 does not give out light, controls night illuminance low light emitting module 400 is luminous, has reached the purpose of effective reduction power consumption.
Further, the light emitting time of the light emitting module 400 may also be timed by the internal clock of the control chip U1, specifically, after the light emitting module 400 is turned on, the power needs to be reduced (for example, to 30% power) after a period of time (for example, 6 hours), and the light emitting module 400 is turned off until the illuminance of the natural light is high. When the light emitting module 400 is turned on (100% power), timing is started, and after the timing reaches 6 hours, a dimming signal is output to the light emitting module 400 to reduce the working current to 30%, and when the lighting illuminance is high, a dimming signal is output to the light emitting module 400 to turn off the working current, so that the light emitting module 400 does not emit light; in this way, the power of the light emitting module 400 is reduced after the zero point is passed, and at this time, the activity of people is less, and the frequency of using the light emitting module 400 for auxiliary illumination is less, so that energy can be saved more than that in a way of not reducing the power.
In this embodiment, in addition to the timing of 6 hours by the clock inside the control chip U1, the timing of 6 hours may be performed by counting the cycle of the electrical signal. The detection result may also be used for performing a synchronous operation, and the following description is given by taking a 6-hour clock as an example, when the internal clock of the control chip U1 is used for timing, because the clock of each control chip U1 has a deviation, which depends on the process of the control chip U1 and the circuit structure of the clock, causes a 6-hour clock inaccuracy between the light emitting modules 400, and causes some of the light emitting modules 400 to power down in advance, some of the light emitting modules 400 to power down in a delayed manner, and the consistency is particularly poor. And the period of counting the electric signals is used for timing for 6 hours, because all the light-emitting modules 400 are connected with the same alternating current, the periods of the electric signals detected by all the light-emitting modules 400 are consistent, and the synchronization method has accurate timing, small error and better consistency.
When the light emitting module is not turned off by the dimming signal, the light emitting module periodically emits light and does not emit light along with the line voltage, at the moment, the electric signal output by the light sensing module also periodically changes along with the line voltage, and the maximum amplitude and the minimum amplitude of the corresponding line voltage are obtained by detecting the maximum amplitude and the minimum amplitude of the electric signal; because the light signal of the light-emitting module periodically changes along with the line voltage, the light detection module detects the light signal of the light-emitting module, namely the line network phase can be detected, and further the control of the working state of the light-emitting module is realized.
Further, with reference to fig. 2, the light emitting module 400 includes an LED string, an operational amplifier OP2, a second resistor R2, and a MOS transistor Q1; the input end of the LED lamp string is connected with a line voltage input end, the output end of the LED lamp string is connected with the drain electrode of the MOS tube Q1, the source electrode of the MOS tube Q1 is connected with one end of the second resistor R2 and the reverse-phase input end of the operational amplifier OP2, the positive-phase input end of the operational amplifier OP2 is connected with the control module 300, one end of the second resistor R2 is grounded, the second resistor R2 is a constant current resistor and used for adjusting the working current flowing through the LED lamp string, and the light-emitting module 400 adjusts the corresponding working state according to the dimming signal to complete the lighting function.
Further, the low-voltage dc power supply module 500 includes a third resistor R3, a capacitor C1, and a zener diode ZD 1; one end of the third resistor R3 is connected to a line voltage input end, the other end of the third resistor R3 is connected to one end of the capacitor C1 and the negative electrode of the zener diode ZD1, the positive electrode of the zener diode ZD1 and the other end of the capacitor C1 are grounded, and electric energy is provided for the light detection module 200 and the control module 300 in a resistor and voltage regulator tube manner, so that stable operation of the light detection module 200 and the control module 300 is ensured.
Further, referring to fig. 3, a second embodiment of the present invention is different from the first embodiment in that the other end of the first resistor R1 of the light detection module 200 is no longer grounded and is directly connected to the 5 th pin of the control chip U1; when the light detection module 200 is required to perform detection, the control chip U1 outputs a low level from the P0.2 port, that is, the 5 th pin of the control chip U1, the light detection module 200 starts to operate, and after a period of time, the low level is generally microsecond level, depending on the operating current and response time of the photodiode, the control chip U1 samples the output of the light detection module 200, and then the P0.2 port of the control chip U1 is set as an input port, which is equivalent to that the lower end of the first resistor R1 is suspended, at this time, the light detection module 200 does not consume current any more, the current of the light detection module 200 can be reduced to 0.1 milliampere or less, and compared with the case where the light detection module 200 consumes current all the time in the first implementation, the power consumed by the light detection module 200 can be greatly reduced, and lower static power consumption is realized.
Further, referring to fig. 4, in a third embodiment of the present invention, the control module 300 includes a comparator OP1 and a determining unit; the inverting input end of the comparator OP1 is connected with the light detection module 200; the non-inverting input terminal of the comparator OP1 is connected to the reference voltage input terminal, the output terminal of the comparator OP1 is connected to the determining unit, and the determining unit is further connected to the light emitting module 400.
In this embodiment, the control module 300 is composed of the comparator OP1 and the determining unit, the electrical signal output by the photodetection module 200 is sent to the inverting input terminal of the comparator OP1, the comparator OP1 compares the electrical signal with the reference voltage and then outputs the comparison result to the determining unit, the determining unit determines that the electrical signal is greater than the predetermined signal in the predetermined time, which indicates that the ambient light illuminance is high and the LED string is not needed for auxiliary lighting, and then the determining unit outputs the dimming signal to the light emitting module 400 to make the light emitting module 400 not emit light; the judging unit judges that the electric signal is always smaller than the preset voltage and the light emitting module 400 is turned off by the dimming signal within the preset time, which indicates that the ambient light is low at the moment, the LED lamp is needed for auxiliary illumination, and the judging unit outputs the dimming signal to the light emitting module 400 to enable the light emitting module 400 to emit light; the judging unit judges that the electrical signal is periodically smaller than a preset voltage along with the line voltage within a preset time, which indicates that the light emitting module 400 is not turned off by the dimming signal and the ambient light illumination is low, the LED light string needs to be continuously turned on to assist in lighting, and the judging unit continuously outputs the dimming signal to the light emitting module 400 so that the light emitting module 400 keeps emitting light; by accurately distinguishing the ambient light signal from the signal of the light emitting module 400, effective control of the light emitting module 400 is achieved to reduce the power of the light emitting module 400.
Correspondingly, the utility model also provides a light detection circuit's of LED lamp theory of operation specifically be light detection module detects the ambient light signal and the light signal of light emitting module, and according to the light signal of light emitting module with ambient light signal, or the corresponding electric signal of ambient light signal output to control module; the control module controls the light emitting module to be turned off when the electric signal in a preset time is greater than a preset signal; when the electric signal in a preset time is smaller than a preset signal, controlling the light-emitting module to be lightened; and when the electric signal in the preset time is periodically smaller than the preset signal along with the input line voltage, controlling the light-emitting module to continuously light.
The utility model discloses still correspondingly provide a LED lamp, the LED lamp includes the light detection circuitry of LED lamp, because the above has been right the light detection circuitry of LED lamp has carried out detailed introduction, and here is no longer detailed.
In summary, the utility model provides a light detection circuit and LED lamp of LED lamp, light detection circuit includes light detection module, control module and light emitting module; the light detection module is used for detecting an ambient light signal and a light signal of the light emitting module, and outputting a corresponding electric signal to the control module according to the light signal of the light emitting module and the ambient light signal or the ambient light signal; the control module is used for controlling the light emitting module to be turned off when the electric signal in a preset time is greater than a preset signal; when the electric signal in a preset time is smaller than a preset signal, controlling the light-emitting module to be lightened; and when the electric signal in the preset time is periodically smaller than the preset signal along with the input line voltage, controlling the light-emitting module to be continuously lightened, and effectively controlling the LED lamp by accurately distinguishing an ambient light signal and a light signal of the LED lamp so as to save energy consumption.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.
Claims (9)
1. The light detection circuit of the LED lamp is characterized by comprising a light detection module, a control module and a light emitting module; the light detection module is used for detecting an ambient light signal and a light signal of the light emitting module, and outputting a corresponding electric signal to the control module according to the light signal of the light emitting module and the ambient light signal or the ambient light signal; the control module is used for controlling the light emitting module to be turned off when the electric signal in a preset time is greater than a preset signal; when the electric signal in a preset time is smaller than a preset signal, controlling the light-emitting module to be lightened; and when the electric signal in the preset time is periodically smaller than the preset signal along with the input line voltage, controlling the light-emitting module to continuously light.
2. The light detection circuit of the LED lamp according to claim 1, wherein the light detection module is specifically configured to output the electrical signal to the control module according to the ambient light signal when the light emitting module is turned off; when the light emitting module is lightened, an electric signal is output to the control module according to the environment light signal and the light signal of the light emitting module.
3. The light detection circuit of an LED lamp of claim 1, further comprising a low voltage dc power supply module, wherein the low voltage dc power supply module provides an operating voltage to the control module and the light detection module according to the line voltage.
4. The light detection circuit of an LED lamp of claim 3, wherein the light detection module comprises a photosensor and a first resistor; one end of the photosensitive device is connected with the low-voltage direct current power supply module and the control module; the other end of the photosensitive device is connected with one end of the first resistor and the control module, and the other end of the first resistor is grounded.
5. The optical detection circuit of an LED lamp according to claim 4, wherein the control module comprises a control chip, a 1 st pin of the control chip is connected to one end of the photosensitive device and the low voltage dc power supply module, a 2 nd pin of the control chip is connected to the other end of the photosensitive device, a 3 rd pin of the control chip is connected to the light emitting module, and a 4 th pin of the control chip is grounded.
6. The light detection circuit of an LED lamp according to claim 1, wherein the control module comprises a comparator and a judgment unit; the inverting input end of the comparator is connected with the optical detection module; the positive phase input end of the comparator is connected with the reference voltage input end, the output end of the comparator is connected with the judging unit, and the judging unit is also connected with the light-emitting module.
7. The light detection circuit of an LED lamp according to claim 1, wherein the light emitting module comprises an LED lamp string, an operational amplifier, a second resistor and an MOS transistor; the input end of the LED lamp string is connected with the voltage input end, the output end of the LED lamp string is connected with the drain electrode of the MOS tube, the source electrode of the MOS tube is connected with one end of the second resistor and the inverting input end of the operational amplifier, the positive phase input end of the operational amplifier is connected with the control module, and one end of the second resistor is grounded.
8. The light detection circuit of an LED lamp according to claim 3, wherein the low voltage DC power supply module comprises a third resistor, a capacitor and a voltage regulator diode; one end of the third resistor is connected with a line voltage input end, the other end of the third resistor is connected with one end of the capacitor and the negative electrode of the voltage stabilizing diode, and the positive electrode of the voltage stabilizing diode and the other end of the capacitor are grounded.
9. An LED lamp comprising the light detection circuit of the LED lamp according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922302000.8U CN211240202U (en) | 2019-12-18 | 2019-12-18 | Light detection circuit of LED lamp and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922302000.8U CN211240202U (en) | 2019-12-18 | 2019-12-18 | Light detection circuit of LED lamp and LED lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211240202U true CN211240202U (en) | 2020-08-11 |
Family
ID=71921012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922302000.8U Active CN211240202U (en) | 2019-12-18 | 2019-12-18 | Light detection circuit of LED lamp and LED lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211240202U (en) |
-
2019
- 2019-12-18 CN CN201922302000.8U patent/CN211240202U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6157119B2 (en) | Wake-up of light sensor in lighting equipment | |
| CN111148320B (en) | Light control circuit of LED lamp | |
| CN105792414A (en) | Automatic lamplight control method for light-controlled bulb lamp | |
| CN104486889A (en) | Photosensitive LED lamp and control method | |
| US9220153B2 (en) | Illuminating apparatus and control method for keeping a constant total brightness of ambient light and light produced by the illuminating apparatus | |
| CN112804794B (en) | Thing networking lighting control device and system | |
| CN108541111B (en) | Constant-current output control circuit and method for LED lamp illumination driving and LED device | |
| CN211128329U (en) | Dimming circuit and device for reducing silicon controlled rectifier dimming stroboflash | |
| CN111031636B (en) | Light-operated LED lamp circuit capable of setting working mode | |
| CN211240202U (en) | Light detection circuit of LED lamp and LED lamp | |
| CN106163050B (en) | Street lamp buffer control system | |
| CN110113842B (en) | Ambient light induction control lamp switch circuit | |
| CN202118699U (en) | Automatic dimming light-emitting diode (LED) lamp | |
| CN110933817A (en) | Light detection circuit and method for LED lamp and LED lamp | |
| CN202972601U (en) | Optically controlled LED tubing lamp | |
| CN210431969U (en) | LED control circuit and control device capable of automatically sensing ambient light | |
| CN210247104U (en) | Light-operated night-light of discolouring of taking touch to adjust luminance | |
| CN205336608U (en) | Light emitting diode (LED) constant -current driving power supply | |
| CN210469797U (en) | Switching power supply type light-operated LED lamp circuit | |
| CN210609805U (en) | Ambient light sensing control lamp switch circuit | |
| US10856383B1 (en) | Light sensing drive circuit and lamp | |
| CN111132416B (en) | Light-operated lamp and control method | |
| CN112954867B (en) | Induction LED lamp | |
| CN203181278U (en) | Light source for illumination and lighting circuit thereof | |
| CN212163779U (en) | Light-operated synchronous circuit of LED lamp and LED lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |