CN201119106Y - Self-adapted lighting controller for fluorescent lamp - Google Patents
Self-adapted lighting controller for fluorescent lamp Download PDFInfo
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- CN201119106Y CN201119106Y CNU2007200976495U CN200720097649U CN201119106Y CN 201119106 Y CN201119106 Y CN 201119106Y CN U2007200976495 U CNU2007200976495 U CN U2007200976495U CN 200720097649 U CN200720097649 U CN 200720097649U CN 201119106 Y CN201119106 Y CN 201119106Y
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Abstract
The utility model relates to a fluorescent lamp self-adaptive illumination controller, which comprises a single-chip microcomputer and the peripheral circuit thereof, wherein the single-chip microcomputer is connected with a light intensity detection module, which is used for receiving the continuous lighting intensity information picked by the light intensity detection module, the single-chip microcomputer can be connected with a light adjustable electronic ballast circuit simultaneously, by utilizing the ACD in the chip, mode number conversion to the received the lighting intensity information can be performed through the single-chip microcomputer, after the mode number conversion, the output from the DAC in the chip to the light adjustable electronic ballast circuit can be controlled according to the pre-defined algorithm, the light adjustable electronic ballast circuit is connected with a load fluorescent lamp tube, to realize the automatic and continuous adjustment of the fluorescent lamp. The fluorescent lamp self-adaptive illumination controller can realize the automatic and continuous adjustment of the brightness of the fluorescent lamp along with the external environment, on the premise of guaranteeing the lighting quality, the electric energy is greatly economized, and the service life of the fluorescent lamp is prolonged. The fluorescent lamp self-adaptive illumination controller can be used on the prior illuminating equipment, and the self-adaptive brightness control of fluorescent lamp can be realized through simple alteration, to improve the lighting quality.
Description
[technical field]:
The utility model relates to a kind of illumination control field, the automatic continuously adjustable self adaptation lighting controller of especially a kind of brightness of fluorescent lamp.
[background technology]:
Along with the continuous development of lighting technology and lighting apparatus, fluorescent lighting has become current application lighting system the most widely, fade out gradually people's the visual field of traditional incandescent lamp.For the control of fluorescent lamp, traditional mode is to adopt hand switch that it is artificially controlled, and this control mode is simple, cost is lower.But control mode is single, can not realize automatic control, for no personal management's public arena, as classroom, meeting room, auditorium etc., the phenomenon that nobody turns off the light often occurs, and causes the significant wastage of electric energy.
Some fluorescent lamp control automatic control equipment major parts that occur in the market have only switching function, its operation principle is according to after the acquired signal such as photoelectric sensor, human body sensor, sound transducer, by the switch of simple logical circuit control relay, thereby realization is to the control of electric light.This control mode can only realize the switch control to fluorescent lamp, and frequent switch can cause damage to the useful life of fluorescent lamp, also was unfavorable for the improvement of lighting quality.And, can only realize manual light modulation for present most of adjusting brightness of fluorescent lamp equipment, and cost an arm and a leg, be not suitable for cost sensitivity, the more place of lighting apparatus.
[summary of the invention]:
The purpose of this utility model provides a kind of self adaptation of fluorescent lamp cheaply lighting controller, can carry out adaptive power to fluorescent lamp according to extraneous photoenvironment and regulate continuously, improves lighting quality, prolongs the useful life of electric light, effectively saves energy.
The fluorescent lamp self adaptation lighting controller that the utility model provides, comprise a single-chip microcomputer and a peripheral circuit thereof that adopts mixed signal SoC chip C8051F001, this single-chip microcomputer is connected with the luminous intensity measurement module, be used to accept the continuous illumination strength information that the luminous intensity measurement module collects, this single-chip microcomputer is connected with the dimmable electronic ballast circuit simultaneously, after single-chip microcomputer utilizes the interior ADC of sheet that the intensity of illumination information that receives is carried out analog-to-digital conversion, according to DAC in the pre-defined algorithm control strip to the output of dimmable electronic ballast circuit, the dimmable electronic ballast circuit is connected with the support flourescent lamp pipe, realizes regulating continuously automatically of brightness of fluorescent lamp; This single-chip microcomputer also connects keyboard, display module simultaneously.
Wherein, the luminous intensity measurement module is made of silicon photocell and precision operational-amplifier MAX4236, the positive pole of silicon photocell PH1 links to each other with the positive input terminal of precision operational-amplifier MAX4236 (U1), the negative pole of silicon photocell PH1 links to each other with the negative input end of operational amplifier MAX4236 (U1), and potentiometer R1 two ends are output and the negative input end of concatenation operation amplifier U1 respectively; The SHDN end company+5V power supply of precision operational-amplifier MAX4236 (U1), the output OUTPUT of MAX4236 (U1) connect the analog quantity input AIN0 end of single-chip microcomputer C8051F001 (U3).
Described dimmable electronic ballast circuit is that core is equipped with external passive device formation with electronic ballast for fluoresent lamp control chip IR2159, applied environment is that load is the T8 fluorescent tube of 36W, alternating current input 185～265V, the light modulation aanalogvoltage is input as 0.5～5V direct voltage; Wherein, power input (Rectified AC Line) refers to the filtered direct current of AC rectification, DC BUS refers to through voltage stabilizing and the adjusted direct current of power factor, second resistance (R2), the 3rd electric capacity (C3) be connected in parallel on control chip IR2159 (U3) the VDC end and-DC BUS between; Analog input voltage is by the DIM end of the 3rd resistance (R3) input IR2159 (U3); The 4th electric capacity (C4), the 5th electric capacity (C5), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7) be connected in respectively IR2159 (U3) VCO, CPH, MAX, MIN, FMIN, IPH end and-DC BUS between; The 8th resistance (R8) is connected between the VDC end of RectifiedAC Line and IR2159 (U3); The 9th resistance (R9) is connected between the VCC end of Rectified AC Line and IR2159 (U3); The drain electrode of first metal-oxide-semiconductor (Q1) links to each other with 1+DC BUS, and grid links to each other by the HO end of the tenth resistance (R10) and IR2159 (U3), and the VS end of source electrode and IR2159 (U3) links to each other; The 6th electric capacity (C6) is connected between the VCC and COM end of IR2159 (U3); The 7th electric capacity (C7) be connected in IR2159 (U3) SD and-DC BUS between; The 8th electric capacity (C8) be connected in IR2159 (U3) CS and-DC BUS between; The 11 resistance (R11) and first diode (D1) are connected on VB end and the VCC end of 1R2159 (U3); The 9th electric capacity (C9) end is connected in-DC BUS on, the other end is connected on the common port of R11 and D1; The tenth electric capacity (C10) is connected in VS and the VB end of IR2159 (U3); The drain electrode of second metal-oxide-semiconductor (Q2) links to each other with the source electrode of first metal-oxide-semiconductor (Q1), and grid links to each other by the LO end of the 12 resistance (R12) and IR2159 (U3), and source electrode passes through the 17 resistance (R17) and links to each other with-DC BUS; The 13 resistance (R13) connects the CS end of IR2159 (U3) and the source electrode of second metal-oxide-semiconductor (Q1); The 14 resistance (R14) and the 7th electric capacity (C7) parallel connection; The 15 resistance (R15) end links to each other with-DC BUS, and the other end is connected on the common port of R11 and D1; The 16 resistance (R16), second diode (D2), the 3rd diode (D3) be connected on-common port of DC BUS and R11 and D1 on; The 12 electric capacity (C12) end is connected on the source electrode of first metal-oxide-semiconductor (Q1), and the other end is connected on the common port of D2 and D3; The 18 resistance (R18) and the 11 electric capacity (C11) are connected in parallel on the source electrode of first metal-oxide-semiconductor (Q1) and an end of inductance (L); The other end of inductance (L) is connected on the side pin of fluorescent lamp; The opposite side pin of fluorescent lamp is connected in-DCBUS on; The 13 electric capacity (C13) is connected in parallel on the fluorescent lamp both sides.
Advantage of the present utility model and good effect:
The utility model adopts with the silicon photocell to be the luminous intensity measurement module that constitutes of core and to be that the dimmable electronic ballast that core constitutes realizes that brightness of fluorescent lamp is adjustable continuously automatically according to external environment with IR2159, under the prerequisite that guarantees lighting quality, saves energy greatly can prolong simultaneously useful life of fluorescent lamp.The control core adopts the C8051F001 single-chip microcomputer, can make full use of resource on the sheets such as AD, DA on its sheet, can save cost largely, improves device integration and reliability, and helps model change.
The utility model can be on existing lighting apparatus, just can realize the adaptive control of brightness of fluorescent lamp improving lighting quality by simple transformation, greatly saves electric energy.
[description of drawings]:
Fig. 1 is a fluorescent lamp self adaptation lighting controller theory diagram;
Fig. 2 is a luminous intensity measurement modular circuit schematic diagram;
Fig. 3 is the dimmable electronic ballast circuit diagram;
Fig. 4 is the main control module circuit theory diagrams, comprises single-chip microcomputer, button, LCD etc.
[embodiment]:
Embodiment 1:
The fluorescent lamp self adaptation lighting controller that the utility model provides is made of single-chip microcomputer, luminous intensity measurement module, dimmable electronic ballast circuit, keyboard, display module, as Fig. 1.
Fig. 2 is a luminous intensity measurement modular circuit schematic diagram, mainly is made up of silicon photocell PH1 and precision operational-amplifier MAX4236 (U1).Two input same polarities of silicon photocell and operational amplifier link to each other the input impedance Z between operational amplifier two inputs
iBe the load resistance of silicon photocell, can be expressed as: Z
i=R
1/ (A+1); Wherein, R
1Be feedback resistance, A is the open loop multiplication factor of amplifier; For MAX4236, A=10
5, R
1=100k Ω, then Z
i=1 Ω; Can think that photocell is to be in the short circuit operating state, its output voltage U
0Proportional with input short current, and have
U
0＝I
scR
f＝R
fSФ
Be that output voltage signal is directly proportional with the input luminous flux.This current amplifier is higher and the amplifier noise is low because of the low response speed of input impedance, so signal to noise ratio is very high.Wherein, the positive pole of silicon photocell PH1 links to each other with the positive input terminal of precision operational-amplifier MAX4236 (U1), the negative pole of silicon photocell PH1 links to each other with the negative input end of operational amplifier MAX4236 (U1), and potentiometer R1 two ends are output and the negative input end of concatenation operation amplifier U1 respectively; The SHDN end company+5V power supply of precision operational-amplifier MAX4236 (U1).
Fig. 3 is to be the circuit diagram of the dimmable electronic ballast of core formation with IR2159, IR2159 is a powerful electronic ballast for fluoresent lamp control chip of international ballast company exploitation, is that core can be designed the very complete dimmable electronic ballast of function according to characteristic and user's needs of fluorescent tube with it.The applied environment of this circuit is: load is the T8 fluorescent tube of 36W, alternating current input 185～265V.The back IR2159 that powers on finishes the overall process that is triggered to light-modulating mode from lamp preheating, lamp automatically.Rectified AC Line refers to the filtered direct current of AC rectification among Fig. 2, and+DC BUS refers to through voltage stabilizing and the adjusted direct current of power factor.Its workflow is: warm-up phase: when VCC surpasses low pressure lock-in threshold voltage 12.5V and VDC and surpasses 5.1V, the HC of IR2159 and LO end beginning outputting oscillation signal, the duty ratio of HO and LO output signal is 50%, for preventing the overlapping of MOSFET ON time up and down, chip internal has been set the Dead Time of 1.8s.Voltage controlled oscillator is with the highest operating frequency starting of oscillation.Meanwhile, the internal current source of a 1A is to external definition capacitor C 5 linear-chargings on the CPH pin.Voltage on the CPH pin surpasses 5V is exactly warm-up time during this period of time from beginning to be charged to.The triggering stage: when CPH pin voltage surpasses 5V, IR2159 enters the triggering working stage, and at this moment, chip internal preheat curent reference voltage input terminal no longer links to each other with the preset resistance of IPH pin, but is connected to the threshold voltage of the 1.6V of inside.For guaranteeing reliable triggering, the lamp when as far as possible reducing starter glimmers, and the value of setting R6 will make lowest operating frequency than the low 5kHz of the frequency that triggers frequency or corresponding 100% brightness.After the triggering stage finished, IR2159 entered the light modulation mode of operation.The light modulation stage: when VCO pin voltage was reduced to light-modulating mode voltage controlled oscillator threshold voltage (representative value is 0.5V), IR2159 entered light-modulating mode.The phase place closed-loop control forms, and the phase place of load current begins to adjust in the control input of DIM end according to the user.
The annexation of circuit is: second resistance (R2), the 3rd electric capacity (C3) be connected in parallel on control chip IR2159 (U3) VDC end and-DC BUS between; Analog input voltage is by the DIM end of the 3rd resistance (R3) input IR2159 (U3); The 4th electric capacity (C4), the 5th electric capacity (C5), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7) be connected in respectively IR2159 (U3) VCO, CPH, MAX, MIN, FMIN, IPH end and-DC BUS between; The 8th resistance (R8) is connected between the VDC end of RectifiedAC Line and IR2159 (U3); The 9th resistance (R9) is connected between the VCC end of RectifiedACLine and IR2159 (U3); The drain electrode of first metal-oxide-semiconductor (Q1) links to each other with+DC BUS, and grid links to each other by the HO end of the tenth resistance (R10) and IR2159 (U3), and the VS of source electrode and IR2159 (U3) holds and links to each other; The 6th electric capacity (C6) is connected between the VCC and COM end of IR2159 (U3); The 7th electric capacity (C7) be connected in IR2159 (U3) SD and-DC BUS between; The 8th electric capacity (C8) be connected in IR2159 (U3) CS and-DC BUS between; The 11 resistance (R11) and first diode (D1) are connected on VB end and the VCC end of IR2159 (U3); The 9th electric capacity (C9) end is connected in-DC BUS on, the other end is connected on the common port of R11 and D1; The tenth electric capacity (C10) is connected in VS and the VB end of IR2159 (U3); The drain electrode of second metal-oxide-semiconductor (Q2) links to each other with the source electrode of first metal-oxide-semiconductor (Q1), and grid links to each other by the LO end of the 12 resistance (R12) and IR2159 (U3), and source electrode passes through the 17 resistance (R17) and links to each other with-DC BUS; The 13 resistance (R13) connects the CS end of IR2159 (U3) and the source electrode of second metal-oxide-semiconductor (Q1); The 14 resistance (R14) and the 7th electric capacity (C7) parallel connection; The 15 resistance (R15) end links to each other with-DC BUS, and the other end is connected on the common port of R11 and D1; The 16 resistance (R16), second diode (D2), the 3rd diode (D3) be connected on-common port of DC BUS and R11 and D1 on; The 12 electric capacity (C12) end is connected on the source electrode of first metal-oxide-semiconductor (Q1), and the other end is connected on the common port of D2 and D3; The 18 resistance (R18) and the 11 electric capacity (C11) are connected in parallel on the source electrode of first metal-oxide-semiconductor (Q1) and an end of inductance (L); The other end of inductance (L) is connected on the side pin of fluorescent lamp; The opposite side pin of fluorescent lamp is connected in-DC BUS on; The 13 electric capacity (C13) is connected in parallel on the fluorescent lamp both sides.
Fig. 4 is the main control module circuit theory diagrams, is made of C8051F001 single-chip microcomputer, 16 * 2 LCD, button, DAC output buffer.The analog quantity input interface that has also comprised the luminous intensity measurement module among the figure.C805 1F001 is fully-integrated mixed signal SOC (system on a chip) Soc chip, and inside contains one 8 passage, 12, the ADC of 100kps, and 1 two passage, 12 DAC are highly suitable in this system and use.Also have 16 IO mouths in addition, can be used to connect LCD and button, be used for man-machine interaction.16 * 2LCD is used for showing parameters such as preset mode, luminance threshold, and the function of three buttons is respectively, and: S1 is used to select control model, as hotel, meeting, auditorium, dining room isotype; S2 is used for that luminance threshold adds 1, S3 is used for luminance threshold and subtracts 1.The annexation of single-chip microcomputer pin assignments and circuit is as follows: the 19 resistance (R19), the 16 electric capacity (C16), first button (K1) constitute reset circuit, the 19 resistance (R19), the 16 electric capacity (C16) series connection are between+3.3V power supply and ground, first button (K1) is connected in parallel on the 16 electric capacity (C16) two ends, and reset signal is received the RST end of single-chip microcomputer (U4) from the 19 resistance (R19) and the 16 electric capacity (C16) tie point; The D0 of 16 * 2 LCD (L1)～D7 end meets P0.0～P0.7 of single-chip microcomputer C8051F001 (U4) respectively, the P1.6 of the RS termination single-chip microcomputer C8051F001 (U4) of L1, the P1.7 of the RW termination single-chip microcomputer C8051F001 (U4) of L1, the P1.0 of the E termination single-chip microcomputer C8051F001 (U4) of L1, button S1, S2, S3 meet P1.3, P1.2, the P1.1 of single-chip microcomputer C8051F001 (U4) respectively; The output of luminous intensity measurement module connects the AIN0 end of single-chip microcomputer C8051F001 (U4); The input of the DAC0 termination buffer amplifier circuit of single-chip microcomputer C8051F001 (U4); Buffer amplifier circuit is made of operational amplifier (AR1), the 21 resistance (R21), the two or two resistance (R22), and the 21 resistance (R21) is connected in the DAC0 end of single-chip microcomputer C8051F001 (U4) and the positive input terminal of operational amplifier (AR1); The two or two resistance (R22) is connected between the positive input terminal and output of operational amplifier (AR1).
The whole system operation flow process is: the luminous intensity measurement module detects after the intensity of illumination of surrounding environment, the analog quantity of output 0～2.5V, send in the C8051F001 single-chip microcomputer, after single-chip microcomputer carries out analog-to-digital conversion to it, by to the default luminance threshold and the comparison of current intensity of illumination, make the judgement that increases or reduce fluorescent lamp power,, thereby reach the purpose with an automatic light meter fluorescent lamp according to the output of expectant control algorithm controls DAC.Owing to adopt the internal reference (2.4V) of C8051F001, and the light modulation analog quantity of dimmable electronic ballast is input as 0.5～5V, so by the first-level buffer amplifying circuit output of DAC is amplified, makes it satisfy the requirement of dimmer voltage.
Claims (3)
1, a kind of fluorescent lamp self adaptation lighting controller, it is characterized in that, this controller comprises the single-chip microcomputer and the peripheral circuit thereof that adopt mixed signal SoC chip C8051F001, this single-chip microcomputer is connected with the luminous intensity measurement module, be used to accept the continuous illumination strength information that the luminous intensity measurement module collects, this single-chip microcomputer is connected with the dimmable electronic ballast circuit simultaneously, after single-chip microcomputer utilizes the interior ADC of sheet that the intensity of illumination information that receives is carried out analog-to-digital conversion, according to DAC in the pre-defined algorithm control strip to the output of dimmable electronic ballast circuit, the dimmable electronic ballast circuit is connected with the support flourescent lamp pipe, realizes regulating continuously automatically of brightness of fluorescent lamp; This single-chip microcomputer also connects keyboard, display module simultaneously.
2, fluorescent lamp self adaptation lighting controller according to claim 1, it is characterized in that the luminous intensity measurement module is made of silicon photocell and precision operational-amplifier MAX4236, realize continuous analog quantity output and higher precision, measure intensity of illumination with the ADC in the single-chip microcomputer C8051F001 chip; Wherein, the positive pole of silicon photocell (PH1) links to each other with the positive input terminal of precision operational-amplifier MAX4236 (U1), the negative pole of silicon photocell (PH1) links to each other with the negative input end of precision operational-amplifier MAX4236 (U1), and potentiometer (R1) two ends connect output and the negative input end of precision operational-amplifier MAX4236 (U1) respectively; The SHDN end company+5V power supply of precision operational-amplifier MAX4236 (U1), the output OUTPUT of MAX4236 (U1) connect the analog quantity input AIN0 end of single-chip microcomputer C8051F001 (U4).
3, fluorescent lamp self adaptation lighting controller according to claim 1, it is characterized in that the dimmable electronic ballast circuit is that core is equipped with external passive device formation with electronic ballast for fluoresent lamp control chip IR2159, applied environment is that load is the T8 fluorescent tube of 36W, alternating current input 185～265V, the light modulation aanalogvoltage is input as 0.5～5V direct voltage; Wherein, power input (RectifiedAC Line) refers to the filtered direct current of AC rectification, DC BUS refers to through voltage stabilizing and the adjusted direct current of power factor, second resistance (R2), the 3rd electric capacity (C3) be connected in parallel on control chip IR2159 (U3) the VDC end and-DC BUS between; Analog input voltage is by the DIM end of the 3rd resistance (R3) input IR2159 (U3); The 4th electric capacity (C4), the 5th electric capacity (C5), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7) be connected in respectively IR2159 (U3) VCO, CPH, MAX, MIN, FMIN, IPH end and-DC BUS between; The 8th resistance (R8) is connected between the VDC end of RectifiedAC Line and IR2159 (U3); The 9th resistance (R9) is connected between the VCC end of Rectified AC Line and IR2159 (U3); The drain electrode of first metal-oxide-semiconductor (Q1) links to each other with+DC BUS, and grid links to each other by the HO end of the tenth resistance (R10) and IR2159 (U3), and the VS of source electrode and IR2159 (U3) holds and links to each other; The 6th electric capacity (C6) is connected between the VCC and COM end of IR2159 (U3); The 7th electric capacity (C7) be connected in IR2159 (U3) SD and-DC BUS between; The 8th electric capacity (C8) be connected in IR2159 (U3) CS and-DC BUS between; The 11 resistance (R11) and first diode (D1) are connected on VB end and the VCC end of IR2159 (U3); The 9th electric capacity (C9) end is connected in-DC BUS on, the other end is connected on the common port of R11 and D1; The tenth electric capacity (C10) is connected in VS and the VB end of IR2159 (U3); The drain electrode of second metal-oxide-semiconductor (Q2) links to each other with the source electrode of first metal-oxide-semiconductor (Q1), and grid links to each other by the LO end of the 12 resistance (R12) and IR2159 (U3), and source electrode passes through the 17 resistance (R17) and links to each other with-DC BUS; The 13 resistance (R13) connects the CS end of IR2159 (U3) and the source electrode of second metal-oxide-semiconductor (Q1); The 14 resistance (R14) and the 7th electric capacity (C7) parallel connection; The 15 resistance (R15) end links to each other with-DC BUS, and the other end is connected on the common port of R11 and D1; The 16 resistance (R16), second diode (D2), the 3rd diode (D3) be connected on-common port of DC BUS and R11 and D1 on; The 12 electric capacity (C12) end is connected on the source electrode of first metal-oxide-semiconductor (Q1), and the other end is connected on the common port of D2 and D3; The 18 resistance (R18) and the 11 electric capacity (C11) are connected in parallel on the source electrode of first metal-oxide-semiconductor (Q1) and an end of inductance (L); The other end of inductance (L) is connected on the side pin of fluorescent lamp; The opposite side pin of fluorescent lamp is connected in-DC BUS on; The 13 electric capacity (C13) is connected in parallel on the fluorescent lamp both sides.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200976495U CN201119106Y (en) | 2007-11-12 | 2007-11-12 | Self-adapted lighting controller for fluorescent lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200976495U CN201119106Y (en) | 2007-11-12 | 2007-11-12 | Self-adapted lighting controller for fluorescent lamp |
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| CN201119106Y true CN201119106Y (en) | 2008-09-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101861006A (en) * | 2010-04-09 | 2010-10-13 | 海洋王照明科技股份有限公司 | Dimming control circuit and illumination device |
| CN101720162B (en) * | 2009-11-27 | 2015-01-21 | 海洋王照明科技股份有限公司 | Fluorescent lamp illuminance control circuit, fluorescent lamp control system and control method thereof |
-
2007
- 2007-11-12 CN CNU2007200976495U patent/CN201119106Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101720162B (en) * | 2009-11-27 | 2015-01-21 | 海洋王照明科技股份有限公司 | Fluorescent lamp illuminance control circuit, fluorescent lamp control system and control method thereof |
| CN101861006A (en) * | 2010-04-09 | 2010-10-13 | 海洋王照明科技股份有限公司 | Dimming control circuit and illumination device |
| CN101861006B (en) * | 2010-04-09 | 2013-10-09 | 海洋王照明科技股份有限公司 | Dimming control circuit and illumination device |
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