CN101720162A - Fluorescent lamp illuminance control circuit, fluorescent lamp control system and control method thereof - Google Patents
Fluorescent lamp illuminance control circuit, fluorescent lamp control system and control method thereof Download PDFInfo
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- CN101720162A CN101720162A CN 200910188438 CN200910188438A CN101720162A CN 101720162 A CN101720162 A CN 101720162A CN 200910188438 CN200910188438 CN 200910188438 CN 200910188438 A CN200910188438 A CN 200910188438A CN 101720162 A CN101720162 A CN 101720162A
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Abstract
The invention provides a fluorescent lamp illuminance control circuit, a fluorescent lamp control system and a control method thereof, which are applied to the field of fluorescent lamp illumination. The fluorescent lamp illuminance control circuit comprises a control module, a user input interface module, an illuminance sensor and a communication interface module, wherein the user input interface module is used for receiving a first illuminance value inputted by a user as required; the illuminance sensor is used for collecting light signals in real time according to light change in the environment and converting the light signals into light-current digital signals; and the control module is used for generating a second illuminance value which corresponds to the light-current digital signals and outputting illuminance control signals according to a dimming difference value obtained by using the first illuminance value to subtract the second illuminance value so as to control a dimming ballast, adjust the illuminance of a fluorescent lamp, and ensure that the illuminance in the environment is constant. The fluorescent lamp illuminance control circuit is used for outputting illuminance control signals to control the dimming ballast to adjust the illuminance of the fluorescent lamp, ensures that the illuminance in the environment is constant, saves energy and prolongs the service life of the fluorescent lamp.
Description
Technical field
The invention belongs to the fluorescent lighting field, relate in particular to a kind of fluorescent lamp illuminance control circuit, fluorescent lamp control system and control method thereof.
Background technology
In existing fluorescent light fittings, the user manually imports dim signal by rotary knob and gives the light modulation chip, the light modulation chip is exported to drive circuit with the analog signal conversion of 0～10V for fixing pwm signal, drive circuit is reverse into the required high-frequency ac voltage output of fluorescent lamp with direct voltage, driving fluorescent lamp realizes lamp tube starting.
If want to change the illumination in the environment, need the user to go to regulate by rotary knob; If want to make environment to be in the constant illumination, so along with the variation of light in the environment, need the user constantly to go to regulate, the illumination of this manual adjustments light is difficult to keep illumination constant.And when the illumination of light in the environment is very strong, can not make full use of surround lighting, waste energy, can not prolonging lamp tube service life.
Summary of the invention
The object of the present invention is to provide a kind of fluorescent lamp illuminance control circuit, be intended to solve the problem that existing fluorescent lamp is difficult to guarantee that illumination is constant, wastes energy, can not prolonging lamp tube service life.
The embodiment of the invention is to realize like this, a kind of fluorescent lamp illuminance control circuit, comprise: control module, be connected user's input interface module of first control input end of described control module, be connected the illuminance transducer of second control input end of described control module, and communication interface module; The input of described communication interface module is connected to the control output end of described control module, and the output of described communication interface module connects the dimming ballast that is used to control fluorescent lamp; First brightness value that described user's input interface module receives outside input is fed through described control module, described illuminance transducer is gathered light signal in real time according to the variation of light in the environment, and light signal is converted to the photoelectric current digital signal, be fed through described control module; Described control module generates and corresponding second brightness value of described photoelectric current digital signal, and deduct the light modulation difference that described second brightness value obtains according to described first brightness value, output illumination control signal is controlled described dimming ballast the illumination of fluorescent lamp is regulated, and makes that the illumination in the environment is constant.
Further, described illuminance transducer is connected with described control module by iic bus.
Further, the output of described communication interface module is connected to the input of described dimming ballast by the CAN bus.
Further, described illuminance transducer comprises: light sensor, gather light signal according to the variation of light in the environment; And the AD converting unit, the light signal of described light sensor collection is converted to the photoelectric current digital signal and exports to described control module.
Further, described light sensor is clear glass or photo resistance.
Another purpose of the embodiment of the invention is to provide a kind of fluorescent lamp control system, and it comprises fluorescent lamp illuminance control circuit, dimming ballast and the fluorescent lamp that connects in turn, and described fluorescent lamp illuminance control circuit is above-mentioned fluorescent lamp illuminance control circuit.
Another purpose of the embodiment of the invention also is to provide a kind of control method that adopts above-mentioned fluorescent lamp control system, comprises the steps:
Step a: first brightness value that obtains outside input;
Step b: obtain the variable signal of light in the environment in real time by transducer, generate photo-signal;
Step c: generate second brightness value corresponding with it according to described photo-signal;
Steps d: described first brightness value is deducted described second brightness value obtain the light modulation difference, according to described light modulation difference output illumination control signal;
Step e: described illumination control signal is sent to dimming ballast, regulates, make that the illumination in the environment is constant in order to illumination to fluorescent lamp.
Further, in step e, utilize the CAN bus that described illumination control signal is sent to dimming ballast.
Fluorescent lamp illuminance control circuit provided by the invention is gathered the light signal that changes in the environment by illuminance transducer, the brightness value of setting with the user compares, handle back output illumination control signal control dimming ballast by control module the illumination of fluorescent lamp is regulated, make that the illumination in the environment is constant; Realized energy-conservationly, prolonged useful life of fluorescent lamp tube; Adopt the CAN bus to communicate transmission simultaneously, antijamming capability is strong, long transmission distance.
Description of drawings
Fig. 1 is the modular structure schematic diagram of the fluorescent lamp control system that provides of the embodiment of the invention;
Fig. 2 is the circuit diagram of control module in the fluorescent lamp illuminance control circuit that provides of the embodiment of the invention;
Fig. 3 is the circuit diagram of illuminance transducer in the fluorescent lamp illuminance control circuit that provides of the embodiment of the invention;
Fig. 4 is the circuit diagram of communication interface module in the fluorescent lamp illuminance control circuit that provides of the embodiment of the invention;
Fig. 5 is the realization flow figure of the control method of the employing fluorescent lamp control system that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The fluorescent lamp illuminance control circuit that the embodiment of the invention provides adopts illuminance transducer to gather light signal according to the variation of light in the environment, and light signal is converted to the photoelectric current digital signal, by control module output and corresponding second brightness value of photoelectric current digital signal, and first brightness value and second brightness value compared judgement, according to judged result output illumination control signal control dimming ballast the illumination of fluorescent lamp is regulated, make that the illumination in the environment is constant.
Fig. 1 shows the modular structure of the fluorescent lamp control system that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
Fluorescent lamp control system comprises fluorescent lamp illuminance control circuit 1, dimming ballast 2 and the fluorescent lamp 3 that connects in turn, wherein, fluorescent lamp illuminance control circuit 1 comprises: user's input interface module 11, control module 12, illuminance transducer 13 and communication interface module 14; User's input interface module 11 is connected first control input end of control module 12, illuminance transducer 13 is connected second control input end of control module 12, the input of communication interface module 14 is connected to the control output end of control module 12, the output of communication interface module 14 is connected to the input of dimming ballast 2, and the output of dimming ballast 2 connects fluorescent lamp 3; The user is as required by user's input interface module 11 inputs first brightness value, illuminance transducer 13 is gathered light signal in real time according to the variation of light in the environment, and light signal is converted to the photoelectric current digital signal, control module 12 outputs and corresponding second brightness value of photoelectric current digital signal, and the illumination that first brightness value deducts 2 pairs of fluorescent lamps 3 of light modulation difference output illumination control signal control dimming ballast that second brightness value obtains regulated, make that the illumination in the environment is constant.
The fluorescent lamp illuminance control circuit that the embodiment of the invention provides is owing to the light signal that has utilized in illuminance transducer 13 testing environments, illumination by 2 pairs of fluorescent lamps 3 of control module 12 control dimming ballasts automatically adjusts, can realize that illumination is constant, can make full use of the illumination of natural daylight in the environment like this, realized energy-conservation function, can also make simultaneously the user can not feel the variation of surround lighting, reduce the fatigue strength of eyes, improve operating efficiency; Can also prolong simultaneously the life-span of fluorescent lamp tube.
In embodiments of the present invention, illuminance transducer 13 comprises: light sensor and AD converting unit, wherein, light sensor is gathered light signal according to the variation of light in the environment, and the AD converting unit is converted to the light signal of light sensor collection the photoelectric current digital signal and exports to control module.As one embodiment of the present of invention, light sensor can be clear glass or photo resistance.
In embodiments of the present invention, illuminance transducer 13 is connected with control module 12 by iic bus.The output of control module 12 by controller local area network (Controller Area Network, CAN) bus is connected with communication interface module 14, communication interface module 14 passes through the CAN bus and is connected with dimming ballast 2; The CAN bus is the serial communication protocol of ISO International standardization, is a kind of serial communication network that can effectively support distributed control or real-time control, has outstanding reliability, real-time and flexibility.The embodiment of the invention adopts the CAN bus to communicate, and it is strong to reach antijamming capability, the effect of long transmission distance.
In embodiments of the present invention, control module 12 can adopt micro-control unit (Micro Control Unit MCU), also can adopt other controllers such as single-chip microcomputer.Fig. 2 shows the physical circuit figure of the control module 12 that adopts MCU, for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
Control module 12 comprises chip U9 and peripheral circuit thereof, wherein the VBAT pin of U9 connects the first direct voltage 3.3V, the PC13-TAMPER-RTC pin of U9, PC14-OSC32_IN pin and PC15-OSC32_OUT pin are all unsettled not to be connect, the PD0OSC_IN pin of U9 is connected to the PD1 OSC_OUT pin of U9 by resistance R 33, the PD0 OSC_IN pin of U9 also is connected to the PD1 OSC_OUT pin of U9 by crystal oscillator Y13, the PD0 OSC_IN pin of U9 is also by capacitor C 27 ground connection, the PD1 OSC_OUT pin of U9 is also by capacitor C 26 ground connection, resistance R 32 and capacitor C 24 are connected in series between voltage 3.3V and the ground, resistance R 32 holds S0 to be connected to the NRST pin of U9 with being connected in series of capacitor C 24, resistance R 32 holds S0 also by K switch 1 ground connection with being connected in series of capacitor C 24, resistance R 32 holds S0 also to draw the REST end with being connected in series of capacitor C 24, the VSSA pin ground connection of U9, the VDDA pin of U9 connects the first direct voltage 3.3V, capacitor C 25 is connected between the VDDA pin of the VSSA pin of U9 and U9, the PA0-WKUP pin of U9, the PA1 pin, the PA2 pin, the PA3 pin, the PA4 pin, the PA5 pin, the PA6 pin, the PA7 pin, the PB0 pin, the PB1 pin, the PB10 pin, the PB11 pin is all unsettled not to be connect, the PB2 pin ground connection of U9, the VSS_1 pin ground connection of U9, the VSS_2 pin ground connection of U9, the VSS_3 pin ground connection of U9, the VDD_1 pin of U9 meets the first direct voltage 3.3V, the VDD_2 pin of U9 meets the first direct voltage 3.3V, the VDD_3 pin of U9 meets the first direct voltage 3.3V, the PA15 pin of U9, the PA14 pin, the PA13 pin, the PA12 pin, the PA11 pin, the PA10 pin, the PA9 pin, the PA8 pin, the PB15 pin, the PB14 pin, the PB13 pin, the PB12 pin, the PB3 pin, the PB4 pin, all unsettledly do not connect, the PB5 pin of U9 is drawn the INT-PB5 end, the PB6 pin of U9 is drawn the SCL-PB6 end, the PB7 pin of U9 is drawn the SDA-PB7 end, the PB8 pin of U9 is drawn the CAN-PB8 end, and the PB9 pin of U9 is drawn the CAN-PB9 end.Wherein, chip U9 can adopt 32 arm processor, its inner integrated CAN controller.Chip U9 adopts the design of this high integration, has saved power consumption, has reduced the circuit volume.
In embodiments of the present invention, illuminance transducer 13 adopts integrated circuit, stable work in work, and operating temperature range is wide, can increase the service life; The physical circuit of the illuminance transducer 13 that the employing integrated circuit is realized for convenience of explanation, only shows the part relevant with the embodiment of the invention as shown in Figure 3, and details are as follows.
Illuminance transducer 13 comprises chip U2, resistance R 11, R12, R13 and capacitor C 4, wherein, the VDD pin of chip U2 connects the first direct voltage 3.3V, the VDD pin of chip U2 is also by capacitor C 4 ground connection, the Addr pin of chip U2 and the equal ground connection of GND pin, the SDA pin of chip U2 is connected to the first direct voltage 3.3V by resistance R 11, and the SDA pin of chip U2 also is connected to the PB7 pin of chip U9; The INT pin of chip U2 is connected to the first direct voltage 3.3V by resistance R 12, and the INT pin of chip U2 also is connected to the PB5 pin of chip U9; The SCL pin of chip U2 is connected to the first direct voltage 3.3V by resistance R 13, and the SCL pin of chip U2 also is connected to the PB6 pin of chip U9.Wherein, chip U2 can adopt the TSL2561 chip.
In embodiments of the present invention, change by the level of 14 pairs of control module 12 outputs of communication interface module, the physical circuit of communication interface module 14 for convenience of explanation, only shows the part relevant with the embodiment of the invention as shown in Figure 4, and details are as follows.
Communication interface module 14 comprises chip U7 and resistance R 18, R23, R24, the VCC pin of its chips U7 connects the first direct voltage 3.3V, the GND pin ground connection of chip U7, the RS pin ground connection of chip U7, the VREF pin of chip U7 is unsettled not to be connect, the CANH pin of chip U7 connects the J5CAN bus interface, the CANL pin of chip U7 connects the J4CAN bus interface, resistance R 18 is connected between the CANL pin of the CANH pin of chip U7 and chip U7, the D pin of chip U7 is connected to the PB9 pin of U9 by resistance R 24, and the R pin of chip U7 is connected to the PB8 pin of U9 by resistance R 23.
As one embodiment of the present of invention, chip U7 can adopt the CAN bus transceiver of the 3.3V of Texas Instruments's production, the conversion of signals of the CAN controller output that chip U9 is inner integrated becomes differential signal, also the LVTTL level conversion of CAN controller output is become the CAN signal level of standard simultaneously.
Fig. 5 shows the realization flow of the control method that adopts the fluorescent lamp control system that the embodiment of the invention provides, and specifically may further comprise the steps:
In step S51: first brightness value that obtains outside input;
In step S52: obtain the variable signal of light in the environment in real time by transducer, generate photo-signal;
In step S53: generate second brightness value corresponding according to photo-signal with it,
In step S54: described first brightness value is deducted described second brightness value obtain the light modulation difference, according to described light modulation difference output illumination control signal;
In step S55: the illumination control signal is sent to dimming ballast, regulates, make that the illumination in the environment is constant in order to illumination to fluorescent lamp.
In embodiments of the present invention, in step e, utilize the CAN bus that the illumination control signal is sent to dimming ballast.
In embodiments of the present invention, this control method is obtained the variable signal of light in the environment in real time and is generated photo-signal by transducer; Generate second brightness value corresponding according to photo-signal with it, first brightness value and second brightness value of outside input are compared judgement, control dimming ballast according to judged result output illumination control signal soldier the illumination of fluorescent lamp is regulated, make that the illumination in the environment is constant.
The fluorescent lamp illuminance control circuit that the embodiment of the invention provides is gathered the light signal that changes in the environment by illuminance transducer, the brightness value of setting with the user compares, handle back output illumination control signal control dimming ballast by control module the illumination of fluorescent lamp is regulated, make that the illumination in the environment is constant; Realized energy-conservationly, prolonged useful life of fluorescent lamp tube; Adopt the CAN bus to communicate transmission simultaneously, antijamming capability is strong, long transmission distance.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a fluorescent lamp illuminance control circuit is characterized in that, comprising:
Control module is connected user's input interface module of first control input end of described control module, is connected the illuminance transducer of second control input end of described control module, and communication interface module; The input of described communication interface module is connected to the control output end of described control module, and the output of described communication interface module connects the dimming ballast that is used to control fluorescent lamp;
First brightness value that described user's input interface module receives outside input is fed through described control module,
Described illuminance transducer is gathered light signal in real time according to the variation of light in the environment, and light signal is converted to the photoelectric current digital signal, is fed through described control module;
Described control module generates and corresponding second brightness value of described photoelectric current digital signal, and deduct the light modulation difference that described second brightness value obtains according to described first brightness value, output illumination control signal is controlled described dimming ballast the illumination of fluorescent lamp is regulated, and makes that the illumination in the environment is constant.
2. fluorescent lamp illuminance control circuit as claimed in claim 1 is characterized in that, described illuminance transducer is connected with described control module by iic bus.
3. fluorescent lamp illuminance control circuit as claimed in claim 1 is characterized in that, the output of described communication interface module is connected to the input of described dimming ballast by the CAN bus.
4. fluorescent lamp illuminance control circuit as claimed in claim 1 is characterized in that, described illuminance transducer comprises:
Light sensor is gathered light signal according to the variation of light in the environment; And
The AD converting unit is converted to the light signal of described light sensor collection the photoelectric current digital signal and exports to described control module.
5. fluorescent lamp illuminance control circuit as claimed in claim 4 is characterized in that, described light sensor is clear glass or photo resistance.
6. fluorescent lamp illuminance control circuit as claimed in claim 1, it is characterized in that, described control module comprises arm processor chip U9 and peripheral circuit thereof, the VBAT pin of its chips U9 connects first direct voltage, the PD0 OSC_IN pin of chip U9 is connected to the PD1OSC_OUT pin of chip U9 by resistance R 33, the PD0 OSC_IN pin of chip U9 also is connected to the PD1 OSC_OUT pin of chip U9 by crystal oscillator Y13, the PD0 OSC_IN pin of chip U9 is also by capacitor C 27 ground connection, the PD1 OSC_OUT pin of chip U9 is also by capacitor C 26 ground connection, resistance R 32 and capacitor C 24 are connected in series between described first dc voltage output end and the ground, resistance R 32 holds S0 to be connected to the NRST pin of chip U9 with being connected in series of capacitor C 24, resistance R 32 holds S0 also by K switch 1 ground connection with being connected in series of capacitor C 24, resistance R 32 holds S0 also to draw the REST end with being connected in series of capacitor C 24, the VSSA pin ground connection of chip U9, the VDDA pin of chip U9 connects first direct voltage, capacitor C 25 is connected between the VDDA pin of the VSSA pin of chip U9 and chip U9, the PB2 pin ground connection of chip U9, the VSS_1 pin ground connection of chip U9, the VSS_2 pin ground connection of chip U9, the VSS_3 pin ground connection of chip U9, the VDD_1 pin of chip U9 connects first direct voltage, the VDD_2 pin of chip U9 connects first direct voltage, the VDD_3 pin of chip U9 connects first direct voltage, the PB5 pin of chip U9 is drawn the INT-PB5 end, the PB6 pin of chip U9 is drawn the SCL-PB6 end, the PB7 pin of chip U9 is drawn the SDA-PB7 end, the PB8 pin of chip U9 is drawn the CAN-PB8 end, and the PB9 pin of chip U9 is drawn the CAN-PB9 end;
Described illuminance transducer comprises that model is the chip U2 of TSL2561, resistance R 11, R12, R13 and capacitor C 4, wherein, the VDD pin of chip U2 connects first direct voltage, the VDD pin of chip U2 is also by capacitor C 4 ground connection, the Addr pin of chip U2 and the equal ground connection of GND pin, the SDA pin of chip U2 is connected to first direct voltage by resistance R 11, and the SDA pin of chip U2 also is connected to the PB7 pin of chip U9; The INT pin of chip U2 is connected to first direct voltage by resistance R 12, and the INT pin of chip U2 also is connected to the PB5 pin of chip U9; The SCL pin of chip U2 is connected to first direct voltage by resistance R 13, and the SCL pin of chip U2 also is connected to the PB6 pin of chip U9;
Described communication interface module comprises CAN bus transceiver chip U7 and resistance R 18, R23, R24, wherein, the VCC pin of chip U7 connects first direct voltage, the GND pin ground connection of chip U7, the RS pin ground connection of chip U7, the CANH pin of chip U7 connects the J5 bus interface, the CANL pin of chip U7 connects the J4 bus interface, resistance R 18 is connected between the CANL pin of the CANH pin of chip U7 and chip U7, the D pin of chip U7 is connected to the PB9 pin of chip U9 by resistance R 24, and the R pin of chip U7 is connected to the PB8 pin of chip U9 by resistance R 23.
7. fluorescent lamp control system, it comprises fluorescent lamp illuminance control circuit, dimming ballast and the fluorescent lamp that connects in turn, it is characterized in that described fluorescent lamp illuminance control circuit is each described fluorescent lamp illuminance control circuit of claim 1-6.
8. a control method that adopts the described fluorescent lamp control system of claim 7 is characterized in that, comprises the steps:
Step a: first brightness value that obtains outside input;
Step b: obtain the variable signal of light in the environment in real time by transducer, generate photo-signal;
Step c: generate second brightness value corresponding with it according to described photo-signal;
Steps d: described first brightness value is deducted described second brightness value obtain the light modulation difference, according to described light modulation difference output illumination control signal;
Step e: described illumination control signal is sent to dimming ballast, regulates, make that the illumination in the environment is constant in order to illumination to fluorescent lamp.
9. control method as claimed in claim 8 is characterized in that, in step e, utilizes the CAN bus that described illumination control signal is sent to dimming ballast.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910188438.6A CN101720162B (en) | 2009-11-27 | 2009-11-27 | Fluorescent lamp illuminance control circuit, fluorescent lamp control system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910188438.6A CN101720162B (en) | 2009-11-27 | 2009-11-27 | Fluorescent lamp illuminance control circuit, fluorescent lamp control system and control method thereof |
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| CN101720162A true CN101720162A (en) | 2010-06-02 |
| CN101720162B CN101720162B (en) | 2015-01-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106358339A (en) * | 2016-11-08 | 2017-01-25 | 深圳市兴灯业电子有限公司 | Dimmable LED illuminating device capable of automatically keeping illuminance |
| CN109058949A (en) * | 2018-06-29 | 2018-12-21 | 中山市中大半导体照明技术研究有限公司 | The controllable DALI illuminance sensor of permanent illumination |
| CN111629489A (en) * | 2020-06-05 | 2020-09-04 | 东莞华明灯具有限公司 | Self-adaptive anti-interference induction lamp circuit |
| CN117062271A (en) * | 2023-10-13 | 2023-11-14 | 厦门普为光电科技有限公司 | Real-time illumination constant adjusting system and method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88200499U (en) * | 1988-01-16 | 1988-09-21 | 广东省连平塑料厂 | Automatic illumination-regulating device for keeping illumination constant |
| CN101064979A (en) * | 2006-11-28 | 2007-10-31 | 上海电器科学研究所（集团）有限公司 | Wireless control light modulation ballast |
| CN200997718Y (en) * | 2006-12-13 | 2007-12-26 | 厦门金龙联合汽车工业有限公司 | Triggering electronic ballast controlling system of fluorescent light in bus |
| CN201119106Y (en) * | 2007-11-12 | 2008-09-17 | 南开大学 | Self-adapted lighting controller for fluorescent lamp |
| CN101257762B (en) * | 2008-04-10 | 2011-10-05 | 广州威固环保设备有限公司 | Digital intelligent electric ballast of high power ultraviolet lamp tube |
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2009
- 2009-11-27 CN CN200910188438.6A patent/CN101720162B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106358339A (en) * | 2016-11-08 | 2017-01-25 | 深圳市兴灯业电子有限公司 | Dimmable LED illuminating device capable of automatically keeping illuminance |
| CN109058949A (en) * | 2018-06-29 | 2018-12-21 | 中山市中大半导体照明技术研究有限公司 | The controllable DALI illuminance sensor of permanent illumination |
| CN111629489A (en) * | 2020-06-05 | 2020-09-04 | 东莞华明灯具有限公司 | Self-adaptive anti-interference induction lamp circuit |
| CN117062271A (en) * | 2023-10-13 | 2023-11-14 | 厦门普为光电科技有限公司 | Real-time illumination constant adjusting system and method thereof |
| CN117062271B (en) * | 2023-10-13 | 2024-01-19 | 厦门普为光电科技有限公司 | Real-time illumination constant adjusting system and method thereof |
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