CN2852595Y - Switching type lighting unit control device and controller - Google Patents
Switching type lighting unit control device and controller Download PDFInfo
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- CN2852595Y CN2852595Y CN200520122359.2U CN200520122359U CN2852595Y CN 2852595 Y CN2852595 Y CN 2852595Y CN 200520122359 U CN200520122359 U CN 200520122359U CN 2852595 Y CN2852595 Y CN 2852595Y
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Abstract
The utility model relates to a switching type lighting unit control device and a controller. The control system comprises an energy storage unit; the energy storage unit receives input voltage, and the energy storage unit is connected with a light-emitting unit to be controlled in series; an electric discharge unit is connected to the energy storage unit and the light-emitting unit which are connected in series; a diverter switch is connected to the energy storage unit and the light-emitting unit which are connected in series; a current detect unit is connected to the diverter switch in series; when the diverter switch is switched on, according to the working current of the light-emitting unit, a detected current signal is output; the controller is connected to the current detect unit and the diverter switch, and the diverter switch is controlled by a control signal output by the detected current signal, so that the light-emitting unit can adjust brightness in time.
Description
Technical field
The utility model relates to a kind of switching type illuminant unit control device and controller, particularly a kind ofly is applied to control luminous device of luminescence unit and controller.
Background technology
Light-emitting component is as light-emitting diode (light emission diode; LED) illumination effect is decided by the size that flows through the light-emitting component electric current, and high-current flow is crossed the illumination effect that light-emitting component will obtain high brightness, and is anti-, if reduce the electric current that flows through, then the brightness of light-emitting component is with relative weakening.But continue to provide high electric current can reduce the useful life of light-emitting component, and waste many electric power.
Fig. 1 is first embodiment of known luminescence unit control circuit.The illumination effect of luminescence unit among first embodiment (being made up of light-emitting component D1, D2...Dn) can be by voltage source Vcc and resistor R
1Cooperate, by adjusting output driving current I
LEDSize controlled.Drive current I wherein
LEDFor flowing through the electric current of light-emitting component D1, D2...Dn, drive current I
LEDCan learn by following formula (1):
V wherein
D1, V
D2... V
DnBe respectively the pressure drop of light-emitting component D1, D2...Dn; R
1Be resistor R
1Resistance value.
In first embodiment, major defect is that the pressure drop meeting of light-emitting component D1, D2...Dn is subjected to the characteristic of element, as processing procedure and working temperature ... the influence that waits, and influences drive current I
LEDThe while resistor R
1Can cause the power loss of circuit.
Second figure is second embodiment of known luminescence unit control circuit.Voltage source V among second embodiment
SElectric power uses to those light-emitting components D1, D2...Dn in order to provide fixedly.And the illumination effect of light-emitting component D1, D2...Dn can be adjusted by current source Ic.Yet, under this kind control mode, because voltage source V
SBe high pressure, the pressure drop of light-emitting component D1, D2...Dn is a low pressure, so current source Ic can produce great power loss.
Summary of the invention
In view of this, the utility model provides a kind of switching type illuminant unit control device and controller, utilization is flow through the operating current of luminescence unit as FEEDBACK CONTROL, and the control luminescence unit periodically discharges and recharges, and the operating current of stabilized illumination unit is to increase the useful life of luminescence unit.
A kind of switching type illuminant unit control device of the utility model comprises energy-storage units, discharge cell, diverter switch, current detecting unit and controller.It receives input voltage by energy-storage units, provide the luminescence unit that is connected in series to move required operating current: during the diverter switch conducting, current detecting unit and energy-storage units and luminescence unit form charge circuit, and operating current is gone up, and the output sensed current signal; Discharge cell and this energy-storage units and this luminescence unit formed discharge loop when diverter switch was ended, and operating current is decayed gradually.
In the control system, use controller to export a control signal, in order to control this diverter switch according to this sensed current signal.When current detecting unit detected operating current and decays to default low level, the conducting of controller control its switch was charged luminescence unit; When detecting operating current and go up to default high level, controller ends diverter switch, makes the luminescence unit discharge.
Specifically, a kind of switching type illuminant unit control device, the required operating current of control luminescence unit includes: energy-storage units, this luminescence unit that is connected in series, this energy-storage units receives input voltage, to produce this operating current; Discharge cell is connected in parallel with this energy-storage units that is connected in series and this luminescence unit; Current detecting unit, be connected in series this diverter switch and earth terminal, this current detecting unit receives this operating current, and the output sensed current signal; And controller, being connected in this current detecting unit and this diverter switch, this controller receives this sensed current signal, and the output control signal; And diverter switch, this luminescence unit that is connected in series, this diverter switch switches to conducting according to this control signal or ends.
According to described switching type illuminant unit control device, this energy-storage units is an inductor.
According to described switching type illuminant unit control device, this discharge cell is a diode.
According to described switching type illuminant unit control device, this discharge cell comprises that field-effect transistor connects reverser.
According to described switching type illuminant unit control device, this controller includes: pulse generator produces a pulse width signal; Control circuit is connected in this pulse generator, and this control circuit is imported this sensed current signal, this pulse width signal and first minimum detectable signal, and exports this control signal; And second control circuit, being connected in this pulse generator and this first control circuit, this second control circuit receives this control signal, this sensed current signal and second minimum detectable signal, and the output cycle is adjusted signal to this pulse generator.
According to described switching type illuminant unit control device, this pulse generator includes: on/following counting unit, be connected in this second control circuit, on this/following counting unit receives this cycle adjustment signal, and output control code signal; The programmable charge current unit is connected on this/following counting unit, and this programmable charge current unit receives this control code signal, and produces charging current; Discharging current able to programme unit is connected on this/following counting unit, and this discharging current able to programme unit receives this control code signal, and produces discharging current; Capacitor cell is connected in this programmable charge current unit and this discharging current able to programme unit, and this capacitor cell receives this charging current or this discharging current, and produces reference signal; And oscillating unit, being connected in this capacitor, this programmable charge current unit and this discharging current able to programme unit, this oscillating unit receives this reference signal, and exports this pulse width signal and charging current control signal.
According to described switching type illuminant unit control device, this control circuit comprises: the overcurrent comparing unit, receive this sensed current signal and this first minimum detectable signal, and the output reset signal; And control signal generating unit, be connected in this overcurrent comparing unit, and connect this pulse generator by reverser, this control signal generating unit receives this reset signal and this pulse width signal, and via with gate cell, export this control signal.
According to described switching type illuminant unit control device, this second control circuit includes: delay cell, be connected in this first control circuit, and this delay cell receives this control signal, and the output delay signal; Comparing unit, relatively this sensed current signal and this second minimum detectable signal, and produce current state signal; And flip-flop, being connected in this delay cell, this comparing unit and this pulse generator, this flip-flop receives this inhibit signal, and extracts this current state signal, and exports this cycle and adjust signal.
According to described switching type illuminant unit control device, this luminescence unit includes light-emitting component at least.
The controller that the utility model uses includes pulse generator in order to produce pulse width signal; The overcurrent comparing unit is used for receiving and compares the sensed current signal and first minimum detectable signal, with the output reset signal; Control signal generating unit receives this pulse width signal by a reverse unit, simultaneously according to this reset signal and this pulse width signal, through exporting control signal with gate cell; Delay cell receives this control signal, to export an inhibit signal; Comparing unit receives and this sensed current signal of comparison operation and second minimum detectable signal, with the output current status signal; Flip-flop extracts this current state signal according to this inhibit signal, adjusts signal in order to the output cycle and arrives this pulse generator.
Specifically, a kind of switching type illuminant unit control device, the input equal proportion is in the sensed current signal of the operating current of luminescence unit, and the output control signal, includes: pulse generator produces pulse width signal; The overcurrent comparing unit receives this sensed current signal and first minimum detectable signal, and the output reset signal; Control signal generating unit is connected in this overcurrent comparing unit, and is connected in this pulse generator by reverse unit, and this control signal generating unit receives this reset signal and this pulse width signal, and via exporting this control signal with gate cell; Delay cell is connected in this and gate cell, and this delay cell receives this control signal, and the output delay signal; Comparing unit, relatively this sensed current signal and second minimum detectable signal, and produce current state signal; And flip-flop, being connected in this delay cell, this comparing unit and this pulse generator, this flip-flop receives this inhibit signal, and extracts this current state signal, and the output cycle is adjusted signal to this pulse generator.
According to described switching type illuminant unit control device, this pulse generator includes: on/following counting unit, be connected in this second control circuit, on this/following counting unit receives this cycle adjustment signal, and output control code signal; The programmable charge current unit is connected on this/following counting unit, and this programmable charge current unit receives this control code signal, and produces charging current; Discharging current able to programme unit is connected on this/following counting unit, and this discharging current able to programme unit receives this control code signal, and produces discharging current; Capacitor cell is connected in this programmable charge current unit and this discharging current able to programme unit, and this capacitor cell receives this charging current or this discharging current, and produces reference signal; And oscillating unit, being connected in this capacitor cell, this programmable charge current unit and this discharging current able to programme unit, this oscillating unit receives this reference signal, and exports this pulse width signal and charging current control signal.
The present invention also comprises a kind of switching type illuminant unit control device, receives equal proportion in the sensed current signal of the operating current of luminescence unit, and the output control signal, includes: pulse generator produces pulse width signal; First control circuit is connected in this pulse generator, and this control circuit receives this sensed current signal, this pulse width signal and first minimum detectable signal, and exports this control signal; And second control circuit, being connected in this pulse generator and this first control circuit, this second control circuit receives this control signal, this sensed current signal and second minimum detectable signal, and the output cycle is adjusted signal to this pulse generator.
According to described switching type illuminant unit control device, this pulse generator includes: on/following counting unit, be connected in this second control circuit, on this/following counting unit receives this cycle adjustment signal, and output control code signal; The programmable charge current unit is connected on this/following counting unit, and this programmable charge current unit receives this control code signal, and produces charging current; Discharging current able to programme unit is connected on this/following counting unit, and this discharging current able to programme unit receives this control code signal, and produces discharging current; Capacitor cell is connected in this programmable charge current unit and this discharging current able to programme unit, and this capacitor cell receives this charging current or this discharging current, and produces reference signal; And oscillating unit, be connected in this capacitor cell, this programmable charge current unit, with this discharging current able to programme unit, this oscillating unit receives this reference signal, and exports this pulse width signal and charging current control signal.
According to described switching type illuminant unit control device, this control circuit comprises: the overcurrent comparing unit, receive this sensed current signal and this first minimum detectable signal, and the output reset signal; And control signal generating unit, being connected in this overcurrent comparing unit, and connecting this pulse generator by reverser, this control signal generating unit receives this reset signal and this pulse width signal, and via exporting this control signal with gate cell.
According to described switching type illuminant unit control device, this second control circuit includes: delay cell, be connected in this control circuit, and this delay cell receives this control signal, and the output delay signal; Comparing unit, relatively this sensed current signal and this second minimum detectable signal, and produce current state signal; And flip-flop, being connected in this delay cell, this comparing unit and this pulse generator, this flip-flop receives this inhibit signal, and extracts this current state signal, and exports this cycle and adjust signal.
Above general introduction and ensuing detailed description have been all and have further specified claim of the present utility model.And about other purpose of the present utility model and advantage, will in follow-up explanation and accompanying drawing, be set forth.
Description of drawings
Fig. 1 is first embodiment of known luminescence unit control circuit;
Fig. 2 is second embodiment of known luminescence unit control circuit;
Fig. 3 is the electrical block diagram of the utility model switching type illuminant unit control device;
Fig. 4 A is the circuit diagram of first preferred embodiment of the utility model switching type illuminant unit control device;
Fig. 4 B is the circuit diagram of second preferred embodiment of the utility model switching type illuminant unit control device;
Fig. 5 is the circuit diagram of the preferred embodiment of the switching type illuminant unit control device of the utility model announcement;
Fig. 6 is the preferable enforcement circuit block diagram of employed pulse generator in the utility model control device; And
Fig. 7 is the preferable waveform schematic diagram of the utility model.
Wherein, description of reference numerals is as follows:
Prior art:
Voltage source Vcc, Vs resistor R
1
Light-emitting diode 20,21...2n current source Ic
Drive current I
LED
The utility model:
Control signal generating unit 106 and gate cell 108
Flip-flop 122 comparing units 124
On the pulse generator 14/following counting unit 142
144 discharging current able to programme unit 146, programmable charge current unit
Oscillating unit 148 discharge cells 2
Reverser 20 field-effect transistors 22
Energy-storage units 3 luminescence units 4
Current detecting unit 5 field-effect transistor Q
Diverter switch SW detecting element Rs
Charging current control signal S
CInput voltage V
IN
Sensed current signal V
ICapacitor Cs
Control signal V
SPulse width signal PLS
Cycle is adjusted the signal U/D first minimum detectable signal V
REF1
Reset signal S
RESETVoltage signal V
CCTime of delay T
DL
Inhibit signal V
DThe second minimum detectable signal V
REF2
Current state signal V
SDCharging current I
C
Discharging current I
DReference signal V
REF
High critical voltage V
HControl code signal N
0... N
n
Low critical voltage V
L
Embodiment
Please refer to Fig. 3, the electrical block diagram of the preferable switching type illuminant unit control device of the utility model.With reference to figure 3, the switching type illuminant unit control device comprise controller 1, discharge cell 2, energy-storage units 3, current detecting unit 5, with diverter switch SW.
Energy-storage units 3 terminations are received input voltage V
IN, the other end is connected to an earth terminal by the luminescence unit 4 of desire control in regular turn with diverter switch SW and current detecting unit 5; Discharge cell 2 is connected in parallel in this energy-storage units 3 and luminescence unit 4 of serial connection; Controller 1 connects diverter switch SW and current detecting unit 5.
Energy-storage units 3 receives input voltage V
INElectric power provide luminescence unit 4 operation required operating current I
S Current detecting unit 5 receives operating current I when this diverter switch SW conducting
S, and the output equal proportion is in operating current I
SSensed current signal V
IController 1 receives this sensed current signal V
I, and according to sensed current signal V
ISize control a control signal V
SOutput level, with control its switch SW conducting or end.
When controller 1 control its switch SW conducting, energy-storage units 3 is connected to earth terminal by luminescence unit 4 and diverter switch SW and current detecting unit 5, forms charge circuit.The electric power of energy-storage units 3 will make operating current I
SReach default high level; When diverter switch SW ended, energy-storage units 3 formed discharge loops, operating current I by luminescence unit 4 and discharge cell 2
SLet out energy by luminescence unit 4 and arresting element 2, and drop to default low level gradually.Above-mentioned high and low level is the default scopes of luminescence unit 4 luminosity.
Wherein luminescence unit 4 can be by more than one light-emitting component (as light-emitting diode (Light EmittingDiode; LED), white light LEDs, laser diode (Laser Diode; LD), High Power LED ... Deng) compose in series.
When switching type illuminant unit control device of the present utility model and power supply unit collocation are used, can be integrated in the PWM controller, so sensed current signal V
ICan receive by the receiving terminal SENSE of PWM controller, and control signal V
SCan be by the output GATE output of PWM controller.
Fig. 4 A is the circuit diagram of first preferred embodiment of the utility model switching type illuminant unit control device.In first preferred embodiment, diverter switch SW is realized by field-effect transistor Q; Energy-storage units 3 is to be realized by inductor L; Discharge cell 2 is to realize that by diode D 5 of current detecting units are by detecting element R
SRealize.
Wherein, the drain electrode end of transistor Q connects discharge cell 2 and luminescence unit 4; Its gate terminal connects the output GATE of controller 1; Its source terminal joint detection element R
SReceiving terminal SENSE with controller 1.When field-effect transistor Q conducting, detecting element R
SCan set up equal proportion in operating current I
SSensed current signal V
I
Fig. 4 B is the circuit diagram of second preferred embodiment of the utility model switching type illuminant unit control device.The difference of second preferred embodiment and the first preferred embodiment circuit is the composition of discharge cell 2, and the annexation of discharge cell 2 and other unit.
In second preferred embodiment, discharge cell 2 connects reverser 20 by field-effect transistor 22 and forms.When field-effect transistor Q is controlled by control signal V
SWhen (high level) and conducting, the output of reverser 20 (low level) can make field-effect transistor 22 end.Inductor L and luminescence unit 4 are by field-effect transistor Q and detecting element R
SBe connected to earth terminal and form charge circuit.
In addition, be controlled by control signal V as field-effect transistor Q
S(low level) and by the time, the output of reverser 20 (high level) will make this field-effect transistor 22 conductings, and form discharge loops with inductor L and luminescence unit 4.
Please cooperate Fig. 3 with reference to figure 5, the circuit diagram of the preferred embodiment of the switching type illuminant unit control device that the utility model discloses.Controller 1 includes pulse generator 14, and pulse generator 14 is in order to periodic generation pulse width signal PLS; First control circuit 10 is connected in this pulse generator 14, according to pulse width signal PLS and sensed current signal V
IWith the first minimum detectable signal V
REF1Comparative result, in order to output control signal V
S Second control circuit 12 is connected in this pulse generator 14 and first control circuit 10, and second control circuit 12 is according to control signal V
SAnd sensed current signal V
IWith the second minimum detectable signal V
REF2Comparative result, the output cycle is adjusted signal U/D.Cycle is adjusted the cycle of signal U/D in order to this pulse width signal of periodic adjustment PLS.
The output Q that is connected reverse unit 102 and control signal generating unit 106 with gate cell 108 is in order to receive the reverse pulse width signal PLS and the output of control signal generating unit 106, to control this control signal V
SWherein receive pulse width signal PLS in order to control control signal V by reverse unit 102 with gate cell 108
SMaximal duty cycle.
This second control circuit 12 uses delay cell 120 to be connected in this first control circuit 10, to receive this control signal V
S, and in T time of delay
DLBack output delay signal V
DComparing unit 124 receives and this sensed current signal of comparison operation V
IWith this second minimum detectable signal V
REF2, and in sensed current signal V
IRise to the second minimum detectable signal V
REF2The time, output current status signal V
SDAnd flip-flop 122 is connected in this delay cell 120, this comparing unit 124 and this pulse generator 14.The frequency end CK receive delay signal V of flip-flop 122
DAfter, store the current state signal V that receives from input D simultaneously
SD, adjust signal U/D and export this cycle in output Q.
Wherein, time of delay T
DLCan be used for avoiding control signal V
SMiss (known technology that operates to of delay cell 120 does not repeat them here) because of noise jamming during generation; And the brightness of luminescence unit 4 can be by setting the first minimum detectable signal V
REF1, the second minimum detectable signal V
REF2And the time of delay of delay cell 120 adjust.By designing the first minimum detectable signal V
REF1With the second minimum detectable signal V
REF2Influence the switching of diverter switch, can set operating current I
SLevel range, and then control luminescence unit 4 brightness range.
Cooperate Fig. 5, please refer to the circuit block diagram of the preferred embodiment of pulse generator in Fig. 6 the utility model control device.In pulse generator 14 uses one/and following counting unit 142 these second control circuits 12 of connection, pulse generator 14 is adjusted signal U/D according to this cycle, output control code signal N
0... N
nProgrammable charge current unit 144 is connected on this/following counting unit 142, in order to receive this control code signal N
0... N
n, and control charging current I according to this
CSize; Discharging current able to programme unit 146 is connected on this/following counting unit 142, receives this control code signal N
0... N
n, and control discharging current I according to this
DSize.
Capacitor Cs connects this programmable charge current unit 144 and this discharging current able to programme unit 146, in order to receive this charging current I
COr according to this discharging current I
DDischarge, so that reference signal V to be provided
REFOscillating unit 148 be connected in this capacitor Cs, programmable charge current unit 144, with discharging current able to programme unit 146, according to this reference signal V
REF, export this a pulse width signal PLS and a charging current control signal S
C, in order to control charging current I
CWith discharging current I
DWhether export.Wherein the composition mode of oscillating unit 148 is that known technology repeats no more.
The reference signal V that receives when oscillating unit 148
REFBe lower than critical voltage V
L, and cycle when adjusting signal U/D and being high potential, on/following counting unit 142 on the number computings, control code signal N
0... N
nControl programmable charge current unit 144 (is charging current I with the magnitude of current of these discharging current able to programme unit 146 outputs
CWith discharging current I
D) increase, charging current control signal S at this moment
CProduce (high level) the 144 switch inside conductings of charging current unit, charging current I
CTo capacitor Cs charging, reference signal V
REFBecome gradually big (slope increase), thus the cycle of pulse width signal PLS minimizing (time of low level state increases), so control signal V
SThe time of high level state increases, and diverter switch SW ON time increases relatively, sets up and the steady operation electric current I
S
In addition, the reference signal V that receives when oscillating unit 148
REFBe higher than a high critical voltage V
HBut when cycle adjustment signal U/D is electronegative potential, on/142 times number computings of following counting unit, programmable charge current unit 144 reduces with the magnitude of current of discharging current able to programme unit 146 outputs, pulse width signal PLS produces (high level) and makes the 146 switch inside conductings of discharging current unit, and capacitor Cs will be according to discharging current I
DDischarge, so reference signal V
REFSlope diminish, cycle of pulse width signal PLS is strengthened (time of high level state increases), so control signal V
SThe time of low level state increases, and diverter switch SW ON time reduces relatively, operating current I
SFlow will reduce relatively because of the effect of discharge cell 2.
Therefore control cycle is adjusted the cycle of signal U/D with adjustable whole pulse generator 14 output pulse width signal PLS, makes control signal V
SThe time that is output as high level (diverter switch SW conducting) can be limited in sensed current signal V
IAt the first minimum detectable signal V
REF1With the second minimum detectable signal V
REF2Between.Flow through the operating current I of luminescence unit 4
SAlso can be, and reach stable because of the switching of diverter switch SW, to improve the luminous stability of luminescence unit 4.
Cooperate Fig. 3 and Fig. 5, please refer to Fig. 7 waveform schematic diagram of the present utility model.When pulse width signal PLS reduces to low level (pulse wave generating unit 14 is started working, oppositely the pulse width signal PLS of unit 102 output high level) by high level, and geometric ratio is in operating current I
SSensed current signal V
IDo not rise to the first minimum detectable signal V
REF1, the control signal V of control unit 10 outputs
SBe high level signal, diverter switch SW conducting, operating current I
SThe electric power that can store according to energy-storage units 3 and the pressure drop of luminescence unit 4 and set up.
As sensed current signal V
IGreater than the first minimum detectable signal V
REF1The time, control signal V
SBe cut-off state (low level) that diverter switch SW ends, discharge cell 2 discharges operating current I by 4 pairs of energy-storage units 3 of luminescence unit
SDecline gradually.The so periodic control signal V that produces
S
As control signal V
SDuring conducting (high level), delay cell 120 begins counting (inhibit signal V
DGo to high level by low level), and through one section time of delay T
DLProduce inhibit signal V
D(going to low level by high level) makes control flip-flop 122 obtain this sensed current signal V
IWith this second minimum detectable signal V
REF2Result relatively adjusts the output of signal U/D and adjust this cycle of output, and then controls luminescence unit 4 and carry out charge or discharge.
In sum, the utility model switching type illuminant unit control device and controller can be used for lowering the power that luminescence unit is consumed when luminous, and improve its luminous stability, can increase the useful life of luminescence unit simultaneously.
Yet, the above, only be the detailed description and the accompanying drawing of the specific embodiment of the utility model the best, but feature of the present utility model is not limited thereto, be not in order to restriction the utility model, all scopes of the present utility model should be as the criterion with the scope of claim, all closing in the embodiment of the spirit variation similar of the utility model claim with it, all should be contained in the category of the present utility model, any skilled personnel in field of the present utility model, can think easily and variation or modify the scope all can be encompassed in described claim of the present utility model.
Claims (15)
1. a switching type illuminant unit control device is controlled the required operating current of luminescence unit, it is characterized in that, includes:
Energy-storage units, this luminescence unit that is connected in series, this energy-storage units receives input voltage, to produce this operating current;
Discharge cell is connected in parallel with this energy-storage units that is connected in series and this luminescence unit;
Current detecting unit, be connected in series this diverter switch and earth terminal, this current detecting unit receives this operating current, and the output sensed current signal; And
Controller is connected in this current detecting unit and this diverter switch, and this controller receives this sensed current signal, and the output control signal; And
Diverter switch, this luminescence unit that is connected in series, this diverter switch switches to conducting according to this control signal or ends.
2. switching type illuminant unit control device according to claim 1 is characterized in that, this energy-storage units is an inductor.
3. switching type illuminant unit control device according to claim 1 is characterized in that, this discharge cell is a diode.
4. switching type illuminant unit control device according to claim 1 is characterized in that, this discharge cell comprises that field-effect transistor connects reverser.
5. switching type illuminant unit control device according to claim 1 is characterized in that, this controller includes:
Pulse generator produces a pulse width signal;
Control circuit is connected in this pulse generator, and this control circuit is imported this sensed current signal, this pulse width signal and first minimum detectable signal, and exports this control signal; And
Second control circuit is connected in this pulse generator and this first control circuit, and this second control circuit receives this control signal, this sensed current signal and second minimum detectable signal, and the output cycle is adjusted signal to this pulse generator.
6. switching type illuminant unit control device according to claim 5 is characterized in that, this pulse generator includes:
On/following counting unit, be connected in this second control circuit, on this/following counting unit receives this cycle adjustment signal, and output control code signal;
The programmable charge current unit is connected on this/following counting unit, and this programmable charge current unit receives this control code signal, and produces charging current;
Discharging current able to programme unit is connected on this/following counting unit, and this discharging current able to programme unit receives this control code signal, and produces discharging current;
Capacitor cell is connected in this programmable charge current unit and this discharging current able to programme unit, and this capacitor cell receives this charging current or this discharging current, and produces reference signal; And
Oscillating unit is connected in this capacitor, this programmable charge current unit and this discharging current able to programme unit, and this oscillating unit receives this reference signal, and exports this pulse width signal and charging current control signal.
7. switching type illuminant unit control device according to claim 5 is characterized in that, this control circuit comprises:
The overcurrent comparing unit receives this sensed current signal and this first minimum detectable signal, and the output reset signal; And
Control signal generating unit is connected in this overcurrent comparing unit, and connects this pulse generator by reverser, and this control signal generating unit receives this reset signal and this pulse width signal, and via with gate cell, export this control signal.
8. switching type illuminant unit control device according to claim 5 is characterized in that, this second control circuit includes:
Delay cell is connected in this first control circuit, and this delay cell receives this control signal, and the output delay signal;
Comparing unit, relatively this sensed current signal and this second minimum detectable signal, and produce current state signal; And
Flip-flop is connected in this delay cell, this comparing unit and this pulse generator, and this flip-flop receives this inhibit signal, and extracts this current state signal, and exports this cycle and adjust signal.
9. switching type illuminant unit control device according to claim 1 is characterized in that this luminescence unit includes light-emitting component at least.
10. a switching type illuminant unit control device is imported equal proportion in the sensed current signal of the operating current of luminescence unit, and the output control signal, it is characterized in that, includes:
Pulse generator produces pulse width signal;
The overcurrent comparing unit receives this sensed current signal and first minimum detectable signal, and the output reset signal;
Control signal generating unit is connected in this overcurrent comparing unit, and is connected in this pulse generator by reverse unit, and this control signal generating unit receives this reset signal and this pulse width signal, and via exporting this control signal with gate cell;
Delay cell is connected in this and gate cell, and this delay cell receives this control signal, and the output delay signal;
Comparing unit, relatively this sensed current signal and second minimum detectable signal, and produce current state signal; And
Flip-flop is connected in this delay cell, this comparing unit and this pulse generator, and this flip-flop receives this inhibit signal, and extracts this current state signal, and the output cycle is adjusted signal to this pulse generator.
11. switching type illuminant unit control device according to claim 10 is characterized in that, this pulse generator includes:
On/following counting unit, be connected in this second control circuit, on this/following counting unit receives this cycle adjustment signal, and output control code signal;
The programmable charge current unit is connected on this/following counting unit, and this programmable charge current unit receives this control code signal, and produces charging current;
Discharging current able to programme unit is connected on this/following counting unit, and this discharging current able to programme unit receives this control code signal, and produces discharging current;
Capacitor cell is connected in this programmable charge current unit and this discharging current able to programme unit, and this capacitor cell receives this charging current or this discharging current, and produces reference signal; And
Oscillating unit is connected in this capacitor cell, this programmable charge current unit and this discharging current able to programme unit, and this oscillating unit receives this reference signal, and exports this pulse width signal and charging current control signal.
12. a switching type illuminant unit control device receives equal proportion in the sensed current signal of the operating current of luminescence unit, and the output control signal, it is characterized in that, includes:
Pulse generator produces pulse width signal;
First control circuit is connected in this pulse generator, and this control circuit receives this sensed current signal, this pulse width signal and first minimum detectable signal, and exports this control signal; And
Second control circuit is connected in this pulse generator and this first control circuit, and this second control circuit receives this control signal, this sensed current signal and second minimum detectable signal, and the output cycle is adjusted signal to this pulse generator.
13. switching type illuminant unit control device according to claim 12 is characterized in that, this pulse generator includes:
On/following counting unit, be connected in this second control circuit, on this/following counting unit receives this cycle adjustment signal, and output control code signal;
The programmable charge current unit is connected on this/following counting unit, and this programmable charge current unit receives this control code signal, and produces charging current;
Discharging current able to programme unit is connected on this/following counting unit, and this discharging current able to programme unit receives this control code signal, and produces discharging current;
Capacitor cell is connected in this programmable charge current unit and this discharging current able to programme unit, and this capacitor cell receives this charging current or this discharging current, and produces reference signal; And
Oscillating unit, be connected in this capacitor cell, this programmable charge current unit, with this discharging current able to programme unit, this oscillating unit receives this reference signal, and exports this pulse width signal and charging current control signal.
14. switching type illuminant unit control device according to claim 12 is characterized in that, this control circuit comprises:
The overcurrent comparing unit receives this sensed current signal and this first minimum detectable signal, and the output reset signal; And
Control signal generating unit is connected in this overcurrent comparing unit, and connects this pulse generator by reverser, and this control signal generating unit receives this reset signal and this pulse width signal, and via exporting this control signal with gate cell.
15. switching type illuminant unit control device according to claim 12 is characterized in that, this second control circuit includes:
Delay cell is connected in this control circuit, and this delay cell receives this control signal, and the output delay signal;
Comparing unit, relatively this sensed current signal and this second minimum detectable signal, and produce current state signal; And
Flip-flop is connected in this delay cell, this comparing unit and this pulse generator, and this flip-flop receives this inhibit signal, and extracts this current state signal, and exports this cycle and adjust signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520122359.2U CN2852595Y (en) | 2005-11-14 | 2005-11-14 | Switching type lighting unit control device and controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520122359.2U CN2852595Y (en) | 2005-11-14 | 2005-11-14 | Switching type lighting unit control device and controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2852595Y true CN2852595Y (en) | 2006-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200520122359.2U Expired - Fee Related CN2852595Y (en) | 2005-11-14 | 2005-11-14 | Switching type lighting unit control device and controller |
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| CN (1) | CN2852595Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111132413A (en) * | 2018-10-11 | 2020-05-08 | 茂达电子股份有限公司 | Low-surge current driving circuit and method |
-
2005
- 2005-11-14 CN CN200520122359.2U patent/CN2852595Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111132413A (en) * | 2018-10-11 | 2020-05-08 | 茂达电子股份有限公司 | Low-surge current driving circuit and method |
| CN111132413B (en) * | 2018-10-11 | 2021-11-26 | 茂达电子股份有限公司 | Low-surge current driving circuit and method |
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