CN103634986A - Multipath dimming device and dimming method thereof - Google Patents
Multipath dimming device and dimming method thereof Download PDFInfo
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- CN103634986A CN103634986A CN201310536924.9A CN201310536924A CN103634986A CN 103634986 A CN103634986 A CN 103634986A CN 201310536924 A CN201310536924 A CN 201310536924A CN 103634986 A CN103634986 A CN 103634986A
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Abstract
The invention relates to a multipath dimming device for use in an illuminating occasion and a dimming method thereof. The multipath dimming device comprises a control input device, a control unit and a power supply driving unit, wherein the control input device is used for generating a dimming control signal according to user input; the control unit is used for outputting a mode control signal according to the dimming control signal; the power supply driving unit is used for alternatively driving a multipath semiconductor light source to build up luminance according to the mode control signal. In one alternative driving period, the nonelectric time of at least one part in the semiconductor light sources does not exceed the persistence time thereof. According to the multipath dimming device, the output of the driving unit is stable, intermittent overvoltage protection is avoided, circuit running is more stable, the service life is prolonged, and the dimming effect of multi-stage or stepless adjustment of color temperature and brightness can be realized.
Description
Technical field
The present invention relates to brightness adjustment control field, especially relate to a kind of multichannel light modulating device and light-dimming method thereof.
Background technology
Existing light modulation form can comprise single light source light modulation and multiple light courcess light modulation.Single source light modulation is general only for regulating the bright of light source with dark.Multiple light courcess light modulation not only can be controlled the bright and dark of the whole output of light source, can also regulate the colour temperature of the whole output of light source, and color even, as common RGB mixed light adjusting form etc.
Take semiconductor light sources as example, conventionally adopt at present the form of the corresponding single semiconductor light sources of single drive unit to carry out light modulation, be each different colours or different-colour semiconductor light sources respectively the power drives corresponding with it link, and control each power drives by a total control module, realize by this and control the corresponding semiconductor light sources of each power drives build-up of luminance simultaneously, to form various light source colors, be in harmonious proportion, form various light-modulating modes, satisfy the demands.But the defect of such scheme is, in order to control a plurality of semiconductor light sources build-ups of luminance or bright shadow, saves, and the drive unit that a plurality of correspondences must be set is realized, and has not therefore singly increased the cost of light adjusting and controlling device, is also difficult to reduce the volume of control device simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of multichannel light modulating device that a plurality of dimming light sources are controlled of realizing by single drive unit.
A multichannel light modulating device, for controlling multi-channel semiconductor light source build-up of luminance, it comprises:
Control inputs device, for inputting generation dimming control signal according to user;
Control unit, it is for select corresponding default light-modulating mode according to described dimming control signal, and according to selected default light-modulating mode output mode control signal; And
Power drives unit, it is for according to multi-channel semiconductor light source build-up of luminance described in described mode control signal driven.Wherein, a driven, in the cycle, the only electricity time of at least a portion in described a plurality of semiconductor light sources is all no more than its persistence.
Described default light-modulating mode is, by fill the duty ratio of the mode control signal of each road semiconductor light sources in the cycle a driven, making the duty ratio sum of the mode control signal of multi-channel semiconductor light source is 1, uses permutation and combination and is shaped as various light-modulating modes.And the frequency of described mode control signal is more than or equal to 200HZ.
The present invention also provides a kind of light-dimming method of the multichannel light modulating device based on above-mentioned, and the method comprising the steps of:
1) according to user, input generation dimming control signal;
2) identify described dimming control signal, and select corresponding default light-modulating mode; And
3) transform this default light-modulating mode and export corresponding pwm signal to power drives unit, make power drives unit a plurality of semiconductor light sources described in build-up of luminance alternately in a control cycle, and continue.Wherein said light-modulating mode is: a driven, fill each road build-up of luminance light source duty ratio in the cycle, permutation and combination forms default light efficiency light-modulating mode.In a duty cycle, the only electricity time of at least a portion in described a plurality of semiconductor light sources is all no more than its persistence, and the frequency of described pwm signal is more than or equal to 200HZ.
The present invention also provides a kind of multichannel light modulating device, and it comprises:
One power drives unit, it is for providing nominal drive voltage or electric current to a plurality of semiconductor light sources;
At least one control inputs unit, it produces corresponding dimming control signal for inputting according to user;
At least one control unit, it exports a plurality of pwm signals according to described dimming control signal to described power drives unit, with realization, utilize described power drives unit to control described a plurality of semiconductor light sources extinguishes and lights according to described a plurality of pwm signals, realizing default light mixing effect simultaneously;
Wherein, at least a portion semiconductor light sources in described a plurality of semiconductor light sources is under the control of its pwm signal, and its time of extinguishing is all no more than its persistence, thereby can realize this at least a portion semiconductor light sources omnidistance mixed light in a drive cycle.
Preferably, described at least a portion semiconductor light sources is the semiconductor light sources with different colours or colour temperature or brightness.Described at least a portion semiconductor light sources is alternately lighted in a described drive cycle.
In one embodiment, described power drives unit comprises a constant-current source chip and a plurality of switching tube.Described constant-current source chip has the input port that connects external power source, and one can be to the first output port of the positive pole output constant current of described a plurality of semiconductor light sources, the first end of described a plurality of switching tubes is connected with the negative pole of corresponding semiconductor light sources respectively, its second end ground connection.Described constant-current source chip also can be identified switching-on and switching-off state, its also there is while re-powering output and last time powered on after the each power-off of described input port after the second and the 3rd output port of the contrary signal of output signal, the output signal of described the second output port and the 3rd output port is as described dimming control signal, and therefore described constant-current source chip is also as described control inputs unit.Described at least one control unit comprises a microprocessor, two input ports of described microprocessor are connected with the 3rd output port with described second respectively, and export a plurality of default pwm signals to the control end of described a plurality of switching tubes according to the output signal of the second and the 3rd output port.
Further, described control inputs unit is a kind of in input power collecting unit and multiple wireless remote control signals reception & disposal unit.Wherein input power collecting unit is for gathering the voltage into the input power of described power drives unit power supply, and the voltage collecting is as described dimming control signal.
In another embodiment, described input power is civil power alternating current, described power drives unit comprises that one is converted to by civil power alternating current driving chip and a plurality of switching tube that constant current is exported, and the constant current output of described driving chip is connected with the positive pole of described a plurality of semiconductor light sources; The first end of described a plurality of switching tubes is connected with the negative pole of corresponding semiconductor light sources respectively, its second end ground connection; Described control unit comprises a microprocessor, and an input of described microprocessor is connected with the output of described control inputs unit, and exports a plurality of default pwm signals to the control end of described a plurality of switching tubes according to described dimming control signal.
In another embodiment, between the output of a plurality of pwm signals of described control unit and the control end of described a plurality of switching tubes, be also connected with isolated location, described isolated location is a kind of in optocoupler and magnetic coupling.
The present invention also provides a kind of light-dimming method of multichannel light modulating device, and it comprises step:
According to described dimming control signal, produce a plurality of pwm signals, described a plurality of pwm signals drive extinguishing of a plurality of semiconductor light sources and light by controlling a power drives unit;
Wherein, the time that the configuration of the duty ratio of at least a portion pwm signal in described a plurality of pwm signals is extinguished the corresponding semiconductor light sources of its control is all no more than its persistence, and the frequency of described at least a portion pwm signal is more than or equal to 200HZ.
Preferably, the configuration of the duty ratio of described at least a portion pwm signal is alternately lighted corresponding at least a portion semiconductor light sources.
Multichannel light modulating device of the present invention has the following advantages:
1) adopt the mode of driven to utilize a plurality of semiconductor light sources of single power drives units alternately starter, so, when using constant-current source to drive, the drive current of its output is alternately exported to the plurality of semiconductor light sources, the work that is to say driver element is stable, the situation that there will not be intermittent overvoltage protection, circuit operation is more stable, longer service life;
2) a driven in the cycle, the plurality of semiconductor light sources is not all no more than the time of its twilight sunset by the time of starter (but electricity), therefore, the plurality of semiconductor light sources in whole drive cycle always in mixed light state, frequency more than 200HZ after, naked eyes None-identified starter and twilight sunset state.When the plurality of semiconductor light sources is while having the semiconductor light sources of different colours or colour temperature or brightness, can recently realize by adjusting the duty of the pwm signal of each lamp the dimming effect of multistage or electrodeless adjusting colour temperature, brightness;
3) can realize the object that only drives a plurality of semiconductor light sources with a conventional ADS driving chip, with the volume of the semi-conductor light source device integral body of this light modulating device and a plurality of semiconductor light sources, can accomplish very littlely, make the application surface of this semi-conductor light source device wider;
4) semiconductor light sources is by intermittent starter, and caloric value greatly reduces, light source longer service life.
5) by adjusting, drive the mode of chip output current to come the pattern of color-temperature regulating to carry out ratio with original, be that structure is simpler, cost significantly reduces, and has very high cost performance.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of multichannel light modulating device of the present invention.
Fig. 2 is the optional control inputs device of multichannel light modulating device and control signal type schematic diagram thereof in Fig. 1.
Fig. 3 is the functional block diagram of control unit in Fig. 1.
Fig. 4 is the drive principle figure of power drives unit in Fig. 1.
Fig. 5 is the luminous situation schematic diagram of one embodiment of the invention Zhong San road semiconductor light sources under a drive cycle.
Fig. 6 is the structured flowchart of multichannel light modulating device in one embodiment of the invention.
Fig. 7 is the structured flowchart of multichannel light modulating device in another embodiment of the present invention.
Fig. 8 is the structured flowchart of multichannel light modulating device in further embodiment of this invention.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing, multichannel light modulating device of the present invention and light-dimming method thereof are described in further detail.
Fig. 1 shows functional structure and the control signal flow process of multichannel light modulating device of the present invention.This multichannel light modulating device, from function minute, mainly comprises control inputs device, control unit and power drives unit, for driving a plurality of semiconductor light sources (light source N, N is integer for light source 1, light source 2...), and can realize multiple dimming effect.
Wherein, control inputs unit produces corresponding dimming control signal (M is integer for dimming control signal 1, dimming control signal 2..., dimming control signal M) for inputting according to user.Control inputs unit can be appliance switch or wireless remote control input module, and for example Wi-Fi remote control module, infrared remote control module or RF remote-controlled module, also can utilize smart machine to coordinate wireless receiving module as control inputs unit, sees Fig. 2.Corresponding, dimming control signal can be the signal of telecommunication or packet/stream.Understandable, a plurality of control inputs of multichannel light modulating device possible configuration unit, is user-friendly to.
The dimming control signal that control unit receives for basis is selected corresponding default light-modulating mode, and according to selected default light-modulating mode output mode control signal.Control unit preferably adopts chip, such as single-chip microcomputer, microcontroller (MCU) etc., realizes its function.In one embodiment, please refer to Fig. 3, in control unit, be preset with multiple light-modulating mode (preset mode 1, preset mode 2..., preset mode M), every kind of light-modulating mode comprise N the duty cycle information corresponding with semiconductor light sources 1 to N to be controlled (light source 1 duty ratio, light source 2 duty ratios ..., and the temporal information that starts of significant level (for example high level) light source N duty ratio).Every kind of corresponding a kind of dimming effect of light-modulating mode, in theory by adjusting duty ratio data, can permutation and combination go out very many dimming effects.Control unit also comprises a signal identification module, for the dimming control signal receiving is identified, and selects afterwards corresponding default light-modulating mode in identification.Control unit also comprises a signal generating module, and this signal generating module produces a plurality of pwm signals (pwm signal 1, pwm signal 2..., pwm signal N) according to selected default light-modulating mode usings as mode control signal, and output.In other embodiments, mode control signal can be realized with triangular signal, pulse signal or different electric pressure signal etc., corresponding, multiple default light-modulating mode comprises corresponding triangular signal parameter, pulse signal parameter or electric pressure parameter etc.Understandable, in practical application, can configure according to demand a plurality of control units with the enough mode control signals of output quantity.
Power drives unit is for driving multi-channel semiconductor light source build-up of luminance according to the mode control signal receiving.In preferred embodiment of the present invention; power drives unit adopts a constant-current source driving power to coordinate the plurality of semiconductor light sources of the seamless driven of a plurality of switching device (see figure 4)s; also this constant-current source chip lasting output constant current in a circulation drive cycle (being also a driven cycle) drives a plurality of semiconductor light sources successively; the work that is to say driver element is stable; the situation that there will not be intermittent overvoltage protection; circuit operation is more stable, longer service life.When adopting pwm signal to control, the duty ratio sum of the pwm signal of a plurality of semiconductor light sources is 1.
Fig. 5 shows in a control cycle (driven cycle), and three semiconductor light sources are by the light mixing effect of seamless driven.Can find out, these three semiconductor light sources have realized omnidistance mixed light, and at any time, have a lamp in starter state, and other two lamps are in twilight sunset state.Consider different-colour, the fluorescent material of the light source of different colours has different sunset glow time and different efficiency, can recently adjust the difference on this light source slightly by omiting this duty of inching.When three lamp color temperature differences, can realize adjusting colour temperature.By regulating the distribution of the duty ratio of three pwm signals, can realize multiple dimming effect again.
In addition, a driven in the cycle, only electricity (being the also non-starter state) time of at least a portion in a plurality of semiconductor light sources is all no more than the persistence of this light source, and the frequency of pwm signal is all greater than the discernible scope of human eye (being generally more than or equal to 200HZ).That is to say, at least a portion semiconductor light sources is human eye None-identified at its non-starter state, and sensuously light source continues in lighting the state with mixed light.So a benefit of design is: semiconductor light sources is by intermittent starter, and caloric value greatly reduces, light source longer service life.The most most important advantage is: only with a driving power, driven a plurality of semiconductor light sources, with the volume of the semi-conductor light source device integral body of this light modulating device and a plurality of semiconductor light sources, can accomplish very littlely, make the application surface of this semi-conductor light source device wider.And the plurality of semiconductor light sources always in mixed light state, when this at least a portion semiconductor light sources is while having the semiconductor light sources of different colours or colour temperature or brightness, has realized the dimming effect that regulates colour temperature, brightness in whole drive cycle.Every kind of default light-modulating mode can the rear colour temperature of corresponding a kind of adjusting or brightness.
Understandable, in other embodiment, can adopt constant pressure source or other drive circuit to drive semiconductor light sources, when a plurality of semiconductors are driven, can not adopt the mode of seamless driven, for example in a drive cycle, can drive at least a portion in a plurality of semiconductor light sources, or at a time all semiconductor light sources, all in twilight sunset state, also can realize the effect of similar adjusting colour temperature and brightness adjusting simultaneously.Those skilled in the art can utilize the function that drives chip or pure circuit structure to realize power drives unit.
To sum up, the light-dimming method of above-mentioned multichannel light modulating device comprises step:
1) according to user, input generation dimming control signal;
2) identify described dimming control signal, and select corresponding default light-modulating mode;
3) transform this default light-modulating mode and export corresponding pwm signal to power drives unit, make power drives unit a plurality of semiconductor light sources described in build-up of luminance alternately in a control cycle, and continue; Wherein said light-modulating mode is: a driven, fill each road build-up of luminance light source duty ratio in the cycle, permutation and combination forms default light efficiency light-modulating mode.And in a duty cycle, the only electricity time of at least a portion in described a plurality of semiconductor light sources is all no more than its persistence.
As shown in Figure 6, in one embodiment of the invention, the power drives unit of multichannel light modulating device comprises a constant-current source chip U1 and peripheral circuit (not shown) and a plurality of switching tube (only showing two switching tube Q1 and Q2 in figure).Constant-current source chip U1 has input port AC1 and the AC2 of connection external power source (for example civil power alternating current), and one can export to the positive pole of a plurality of semiconductor light sources (only showing two semiconductor light sources LED1 and LED2 in figure) the first output port OUT1 of constant current.Switching tube Q1 and Q2 can be triode or metal-oxide-semiconductor, adopt metal-oxide-semiconductor in the present embodiment.The first end of switching tube Q1 and Q2 is connected with the negative pole of semiconductor light sources LED1 and LED2 respectively, its second end ground connection, its control end connection control unit, the controlled unit controls of its on off state.When switching tube Q1 and Q2 conducting, constant-current source chip U1 flows through semiconductor light sources LED1 and LED2 from the electric current of the first output port OUT1 output, and semiconductor light sources LED1 and LED2 are luminous by starter, in starter section.When switching tube Q1 and Q2 by time, the loop of semiconductor light sources LED1 and LED2 is disconnected, semiconductor light sources LED1 and LED2 are in starter section.
Constant-current source chip U1 also can identify switching-on and switching-off state, its also there is while re-powering output and last time powered on after input port AC1 and the each power-off of AC2 after the second and the 3rd output port CON1, the CON2 of the contrary signal of output signal.The output signal of the second output port and the 3rd output port CON1, CON2 is output to control unit as dimming control signal, so in the present embodiment, constant-current source chip U1 is also as control inputs unit.Constant-current source chip U1 can adopt, the chip that is OZ2082 such as but not limited to model.
In the present embodiment, control unit comprises microprocessor U2 and peripheral circuit thereof, and two input port IO1 of microprocessor U2 are connected with the 3rd output port CON1, CON2 with second of constant-current source chip U1 respectively with IO2.By internal processes, microprocessor U2 identifies the reversion of the signal of the second and the 3rd output port CON1, CON2 output, to determine the default light-modulating mode that needs output.For example, when first group of CON1, CON2 signal being detected, export two contrary pwm signals of first group, alternately control two semiconductor light sources luminous to reach the first dimming effect.When detecting with first group of CON1, second group of CON1 that CON2 signal is contrary, CON2 signal, export second group, there are two pwm signals different from the duty ratio of the pwm signal of first group, to reach the second dimming effect, by that analogy, after completing last a kind of dimming effect, start the first dimming effect.The benefit of so doing is the shortcoming that we can break away from two kinds of light source inequivalence luminous fluxes, obtains the colour temperature of own demand by program control.In addition, because two-way pwm signal is completely contrary, it is constant that the output of the first output port of chip U1 keeps, and is not prone to the situation of intermittent overvoltage protection.In like manner, when adopting the semiconductor light sources of two different brightness, can realize the effect of brightness regulation.The model of chip U1 is optional, but is not limited to Atmal tiny13.
It will be appreciated by those skilled in the art that, the circuit in Fig. 6 is only an electrical block diagram, in actual applications, the peripheral circuit that also comprises each chip, and the structural design of peripheral circuit is limited to adopted chip, and those skilled in the art can complete, and do not repeat them here.
In another embodiment of the invention, can on the basis of existing product, realize the present invention, also utilize the driving chip on existing product to realize, can directly remove additional driving chip, access control unit and control inputs unit.
Its structure chart as shown in Figure 7, wherein, the power drives unit of multichannel light modulating device comprises conventional ADS driving chip (a constant-current source chip, for example model is SD6800) U21 and peripheral circuit (not shown) and a plurality of switching tube (only showing two switching tube Q1 and Q2 in figure).Drive chip U21 to there is input port AC1 and the AC2 that connects civil power alternating current, and one can export to the positive pole of a plurality of semiconductor light sources (only showing two semiconductor light sources LED1 and LED2 in figure) the first output port OUT1 of constant current.The first end of switching tube Q1 and Q2 is connected with the negative pole of semiconductor light sources LED1 and LED2 respectively, its second end ground connection, its control end connection control unit, the controlled unit controls of its on off state.When switching tube Q1 and Q2 conducting, it drives chip U21 to flow through semiconductor light sources LED1 and LED2 from the electric current of the first output port OUT1 output, and semiconductor light sources LED1 and LED2 are luminous by starter, in starter section.When switching tube Q1 and Q2 by time, the loop of semiconductor light sources LED1 and LED2 is disconnected, semiconductor light sources LED1 and LED2 are in starter section.
In the present embodiment, control inputs unit is an input power collecting unit, and this power supply collecting unit is for the voltage of Gather and input power supply, and the voltage collecting exports control unit to as dimming control signal.Power supply collecting unit can adopt the structure of existing any voltage collection circuit, does not therefore repeat them here.
Control unit comprises microprocessor U22 and peripheral circuit thereof, and an input IO2 of microprocessor U22 is connected with the output of power supply collecting unit, the control end of its output PWM1 and PWM2 difference connecting valve pipe Q1 and Q2.By internal processes, microprocessor U22 identifies the signal of power supply collecting unit output, to determine the default light-modulating mode that needs output.For example, similar with a upper embodiment, when detecting while powering on for the first time, export two contrary pwm signals of first group, alternately control two semiconductor light sources luminous to reach the first dimming effect.When detecting while powering on for the second time, export second group, there are two pwm signals different from the duty ratio of the pwm signal of first group, to reach the second dimming effect, by that analogy, move in circles.
Understandable, available wireless remote control equipment replaces power supply collecting unit to realize according to the object of user's input and output dimming control signal.
Fig. 8 shows the circuit structure schematic diagram of third embodiment of the invention, the difference of itself and a upper embodiment is that power drives unit also comprises an isolated location U23, it is connected between the output PWM1 and PWM2 and switching tube Q1 and the control end of Q2 of microprocessor U22, to realize signal isolation, reduce system interference.Isolated location U23 can be a kind of in optocoupler and magnetic coupling.Understandable, isolated location also can be applicable in the first embodiment.
Although the description of this invention carries out in conjunction with above specific embodiment,, those skilled in the art can carry out many replacements, modifications and variations, be apparent according to above-mentioned content.Therefore, all such substituting, improve and change are all included in the spirit and scope of attached claim.
Claims (12)
1. a multichannel light modulating device, for controlling multi-channel semiconductor light source build-up of luminance, is characterized in that, comprising:
Control inputs device, for inputting generation dimming control signal according to user;
Control unit, it is for select corresponding default light-modulating mode according to described dimming control signal, and according to selected default light-modulating mode output mode control signal;
Power drives unit, it is for according to multi-channel semiconductor light source build-up of luminance described in described mode control signal driven;
Wherein, a driven, in the cycle, the only electricity time of at least a portion in described a plurality of semiconductor light sources is all no more than its persistence.
2. multichannel light modulating device according to claim 1, it is characterized in that, described default light-modulating mode is, by fill the duty ratio of the mode control signal of each road semiconductor light sources in the cycle a driven, the duty ratio sum that makes the mode control signal of multi-channel semiconductor light source is 1, use permutation and combination and be shaped as various light-modulating modes, and the frequency of described mode control signal is more than or equal to 200HZ.
3. a light-dimming method for multichannel light modulating device as claimed in claim 1, is characterized in that, comprising:
1) according to user, input generation dimming control signal;
2) identify described dimming control signal, and select corresponding default light-modulating mode;
3) transform this default light-modulating mode and export corresponding pwm signal to power drives unit, make power drives unit a plurality of semiconductor light sources described in build-up of luminance alternately in a control cycle, and continue; Wherein said light-modulating mode is: a driven, fill each road build-up of luminance light source duty ratio in the cycle, permutation and combination forms default light efficiency light-modulating mode;
Wherein, in a duty cycle, the only electricity time of at least a portion in described a plurality of semiconductor light sources is all no more than its persistence, and the frequency of described pwm signal is more than or equal to 200HZ.
4. a multichannel light modulating device, is characterized in that, comprising:
One power drives unit, it is for providing nominal drive voltage or electric current to a plurality of semiconductor light sources;
At least one control inputs unit, it produces corresponding dimming control signal for inputting according to user;
At least one control unit, it exports a plurality of pwm signals according to described dimming control signal to described power drives unit, with realization, utilize described power drives unit to control described a plurality of semiconductor light sources extinguishes and lights according to described a plurality of pwm signals, realizing default light mixing effect simultaneously;
Wherein, at least a portion semiconductor light sources in described a plurality of semiconductor light sources is under the control of its pwm signal, and its time of extinguishing is all no more than its persistence, thereby can realize this at least a portion semiconductor light sources omnidistance mixed light in a drive cycle.
5. multichannel light modulating device according to claim 4, is characterized in that, described at least a portion semiconductor light sources is the semiconductor light sources with different colours or colour temperature or brightness.
6. according to the multichannel light modulating device described in claim 4 or 5, it is characterized in that, described at least a portion semiconductor light sources is alternately lighted in a described drive cycle.
7. multichannel light modulating device according to claim 4, is characterized in that, described power drives unit comprises a constant-current source chip and a plurality of switching tube; Described constant-current source chip has the input port that connects external power source, and one can be to the first output port of the positive pole output constant current of described a plurality of semiconductor light sources, the first end of described a plurality of switching tubes is connected with the negative pole of corresponding semiconductor light sources respectively, its second end ground connection; Described constant-current source chip also can be identified switching-on and switching-off state, its also there is while re-powering output and last time powered on after the each power-off of described input port after the second and the 3rd output port of the contrary signal of output signal, the output signal of described the second output port and the 3rd output port is as described dimming control signal, and therefore described constant-current source chip is also as described control inputs unit;
Described at least one control unit comprises a microprocessor, two input ports of described microprocessor are connected with the 3rd output port with described second respectively, and export a plurality of default pwm signals to the control end of described a plurality of switching tubes according to the output signal of the second and the 3rd output port.
8. multichannel light modulating device according to claim 4, it is characterized in that, described control inputs unit is a kind of in input power collecting unit and multiple wireless remote control signals reception & disposal unit, wherein input power collecting unit is for gathering the voltage into the input power of described power drives unit power supply, and the voltage collecting is as described dimming control signal.
9. multichannel light modulating device according to claim 8, it is characterized in that, described input power is civil power alternating current, described power drives unit comprises that one is converted to by civil power alternating current driving chip and a plurality of switching tube that constant current is exported, and the constant current output of described driving chip is connected with the positive pole of described a plurality of semiconductor light sources; The first end of described a plurality of switching tubes is connected with the negative pole of corresponding semiconductor light sources respectively, its second end ground connection; Described control unit comprises a microprocessor, and an input of described microprocessor is connected with the output of described control inputs unit, and exports a plurality of default pwm signals to the control end of described a plurality of switching tubes according to described dimming control signal.
10. according to the multichannel light modulating device described in claim 7 or 9, it is characterized in that, between the output of a plurality of pwm signals of described control unit and the control end of described a plurality of switching tubes, be also connected with isolated location, described isolated location is a kind of in optocoupler and magnetic coupling.
11. 1 kinds of light-dimming methods based on multichannel light modulating device claimed in claim 4, is characterized in that, comprising:
According to described dimming control signal, produce a plurality of pwm signals, described a plurality of pwm signals drive extinguishing of a plurality of semiconductor light sources and light by controlling a power drives unit;
Wherein, the time that the configuration of the duty ratio of at least a portion pwm signal in described a plurality of pwm signals is extinguished the corresponding semiconductor light sources of its control is all no more than its persistence, and the frequency of described at least a portion pwm signal is more than or equal to 200HZ.
12. light-dimming methods according to claim 11, is characterized in that, the configuration of the duty ratio of described at least a portion pwm signal is alternately lighted corresponding at least a portion semiconductor light sources.
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| CN105722291A (en) * | 2015-09-27 | 2016-06-29 | 重庆品鉴光电工程有限公司 | Novel standard optical assembly with intelligent control function |
| CN106376131A (en) * | 2016-10-14 | 2017-02-01 | 上海晶丰明源半导体有限公司 | Light-emitting circuit, controller applying same and control method |
| WO2018041169A1 (en) * | 2016-08-31 | 2018-03-08 | 上海微电子装备（集团）股份有限公司 | Automatic optical inspection device and inspection method |
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| CN103634986B (en) | 2016-10-19 |
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