CN202111896U - LED remote control light modulation apparatus - Google Patents
LED remote control light modulation apparatus Download PDFInfo
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- CN202111896U CN202111896U CN2011200335026U CN201120033502U CN202111896U CN 202111896 U CN202111896 U CN 202111896U CN 2011200335026 U CN2011200335026 U CN 2011200335026U CN 201120033502 U CN201120033502 U CN 201120033502U CN 202111896 U CN202111896 U CN 202111896U
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Abstract
An LED remote control light modulation apparatus relates to the electron technology. The utility model comprises a rectification circuit, a primary filter circuit, a remote control signal reception decoding circuit, a feedback voltage acquisition circuit, a transformer, a PMW switch circuit, a switch member and a secondary rectification filter circuit and an LED circuit. The primary filter circuit is connected with the ground level through the transformer primary winding and the switch member; the PMW switch circuit is connected with the control terminal of the switch member; the control terminal of the PMW switch circuit is connected with the output terminal of the feedback voltage acquisition circuit; the feedback voltage acquisition circuit is connected with the remote control signal reception decoding circuit; the feedback voltage acquisition circuit is connected with the secondary windings of the transformer; and the primary winding of the transformer is connected with the LED circuit through the secondary rectification filter circuit. In the utility model, the light modulation is controlled by the conduction of the switch, the remote control decoding and switch driving can be realized by a simple one-chip microcomputer, and the cost is low.
Description
Technical field
The utility model relates to electronic technology.
Background technology
Along with the continuous maturation of technology and the decline of cost, LED in the use of lighting field more and more widely, the advantage of LED is energy-conserving and environment-protective, photochromic quality is good.If in illumination was used, the luminosity of LED can be regulated according to actual needs, LED will have bigger glamour, simultaneously also can be more energy-conservation.Through infrared remote control the device that LED carries out light modulation is had great application prospect, compare general manual dimming mode, remote control light modulating is convenient more.In the illumination in family expenses parlor, when reading is read newspaper, need bright illumination, when seeing TV, be the protection eyes, we hope that at this moment the illumination in parlor can provide darker brightness, and when having a meal, we hope that the brightness of illumination in parlor is moderate.In a word, the parlor is as a multi-functional place, and the intensity of being thrown light in the parlor has different demands.Traditional manual desk lamp with dimmer switch needs us to go to the wall toggle switch, and is very inconvenient.
Fig. 1 is a kind of prior art, adopts the PWM remote control light modulating, though can realize the bigger light modulation degree of depth, can realize intensive light modulation progression.But it can't use the direct driving LED of low-voltage direct Switching Power Supply, needs special PWM output circuit, and implementation cost is higher.And in general illumination application,, do not need continuous brightness regulation such as the parlor illumination, only need what light modulation to get final product.
The utility model content
The utility model technical problem to be solved is, the telecontrol dimmer of a kind of LED is provided, and used infrared remote control can realize multistage light modulation, and circuit is simple, and cost is low.
The technical scheme that the utility model solve the technical problem employing is; A kind of LED telecontrol dimmer; Comprise rectification circuit, prime filter circuit, comprise that also remote signal receives decoding circuit, feedback voltage Acquisition Circuit, transformer, PWM switching circuit, switching device and secondary commutation filter circuit and led circuit; Said prime filter circuit is through primary winding and switching device earth level; The PWM switching circuit connects the control end of switching device; The output of the control termination feedback voltage Acquisition Circuit of PWM switching circuit; The feedback voltage Acquisition Circuit receives decoding circuit with remote signal and is connected, and the feedback voltage Acquisition Circuit connects the second subprime winding of transformer, and first secondary winding of transformer connects led circuit through secondary commutation and filter circuit.
Said feedback voltage Acquisition Circuit comprises a plurality of parallel resistor switching branches, and each branch road comprises the resistance and the switch of series connection, and the control termination remote signal of switch receives decoding circuit.Said switching device is metal oxide semiconductor field effect tube MOSFET.
The beneficial effect of the utility model is, directly uses the Switching Power Supply driving LED, do not need extra led drive circuit, and the control of light modulation realizes that through the conducting of switch remote control decoding, switch drive just can realize that through simple single-chip microcomputer cost is lower.
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Description of drawings
Fig. 1 is the sketch map of prior art.
Fig. 2 is the circuit theory diagrams of the embodiment of the utility model.
Fig. 3 is the circuit diagram of the embodiment of the utility model.
Embodiment
Embodiment: referring to Fig. 2,3.
Present embodiment comprises rectification circuit 1, prime filter circuit 2, comprises that also remote signal receives decoding circuit 9, feedback voltage Acquisition Circuit 7, transformer 5, PWM switching circuit 3, switching device 4 and secondary commutation filter circuit 6 and led circuit 8;
Said prime filter circuit 2 is through transformer 5 elementary windings and switching device 4 earth levels; PWM switching circuit 3 connects the control end of switching device 4; The output of the control termination feedback voltage Acquisition Circuit 7 of PWM switching circuit 3; Feedback voltage Acquisition Circuit 7 receives decoding circuit 9 with remote signal and is connected, and feedback voltage Acquisition Circuit 7 connects the second subprime winding of transformer 5, and first secondary winding of transformer 5 connects led circuit 8 through secondary commutation and filter circuit.
Said feedback voltage Acquisition Circuit 7 comprises a plurality of parallel resistor switching branches, and each branch road comprises the resistance and the switch of series connection, and the control termination remote signal of switch receives decoding circuit 9.
More specifically, present embodiment each several part function is following:
Prime filter circuit 2 will be made further Filtering Processing through the direct current of over commutation, make direct voltage more stable.
Metal oxide semiconductor field effect tube MOSFET4 plays switch, has controlled conducting and shutoff by pwm pulse, and the direct voltage that prime is input to primary is cut and is square-wave voltage.
Transformer 5, the conversion of control primary and secondary voltage.
Secondary commutation filter circuit 6 carries out rectification and filtering with the output of transformer secondary output, obtains galvanic current and presses.
Feedback voltage Acquisition Circuit 7; Feedback voltage by the voltage of biasing winding through resistance R 1, R2, RS1, RS2 ... The RSn dividing potential drop obtains; When switch S 1, S2 ... When Sn is closed; Corresponding resistance R S1, RS2 ... RSn just realizes the parallel connection with R2, reaches the purpose that changes the feedback voltage division ratio.
Remote signal receives decoding circuit 9; This partial circuit is supplied power by low-voltage dc power supply VCC; Signal receiver receives the infrared signal from remote controller, and the infrared signal that receives is carried out decoding processing via signal processing circuit, according to the difference of code value; Controlling output circuit output various signals, through OUT1, OUT2 ... OUTn control switch S1, S2 ... The conducting of Sn and closing.
Led circuit 8 is a led array, can be the led array of other connected modes, for example parallel connection type.
According to the needs of light modulation progression, and the driving force of switching control section and MOSFET, can carry out appropriate design to feedback voltage Acquisition Circuit 7.Divider resistance R2 has n bar parallel branch, and every branch road is respectively the RS1 and the S1 of series connection, RS2 and S2 ... RSn and Sn.Switch S 1, S2 ... The conducting of Sn and close by control circuit 9 and control.Control circuit can make each switch independently cut out and open.The all-in resistance of R2 and its parallel branch is RS, according to the value of the different conditions RS of switch 2n different value is arranged.Promptly under the certain situation of biasing winding voltage, feedback voltage has 2n magnitude of voltage (effective value).Describe in the face of a kind of situation down; Suppose circuit initial condition S1, S2 ... Sn all opens; Be parallel resistance RS1, RS2 ... RSn is in off state, and the effective value of each winding voltage of switch transformer is constant, and this moment, the luminous intensity of led array was constant.This moment, signal receiver received infrared signal, and code value is sent to signal processing circuit if press the remote controller function key; Signal processing circuit is carried out decoding processing, and according to the preset code value and the corresponding relation of function, the output of control output changes; Suppose that function key therewith is corresponding; Control only exports that OUT1 changes, and with switch S 1 closure, promptly RS1 gets into the parallel branch of R2.According to voltage divider principle; The effective value of the feedback voltage that collect this moment will descend, because the reduction of feedback voltage, switching control section will be regulated the output duty of ratio; Increase the ON time of MOSFET; So that secondary voltage raises, the voltage of biasing winding also raises, and comes back to initial stable state up to the feedback voltage that samples.Because secondary voltage raises, the electric current that flows through led array will increase, and promptly luminous intensity strengthens.
Other situation similarly, switch arrays S1, S2 ... The on off state of Sn has 2n kind compound mode, and promptly the RS value has the 2n kind; Under the certain situation of biasing winding effective voltage value; Because the change of RS value, the feedback voltage that collects have the 2n kind to change, according to the change of feedback voltage; Switching control section output duty of ratio is also done the adjustment of 2n kind; Secondary output voltage is also done the adjustment of 2n kind thus, and the luminous intensity of led array the 2n kind has also taken place changed, and promptly circuit has been realized the light modulation of 2n level.
Feedback voltage Acquisition Circuit 7 can adopt triode as switch.More specifically, like Fig. 3, be example with the light modulation of 8 kinds of gray scales, switching control section and MOSFET are incorporated in the same IC 1, the elementary copped wave of the drain electrode of IC1 output D control transformer.R3, R4, D3, C7 form surge voltage and suppress circuit.Gate-controlled switch is realized by NPN type triode Q1, Q2, Q3.Signal processing, controlling output circuit are by chip microcontroller, and external crystal oscillator X1 is that single-chip microcomputer provides clock signal, and a single-chip microcomputer and remote control Y1 is by the power supply of secondary transformer biasing winding; A remote control Y1 receives the infrared signal from remote controller; Code value is transferred to single-chip microcomputer, and the code value that each button of remote controller is corresponding is unique, and single-chip microcomputer handles accordingly through preset program; Confirm the output state of I/O1, I/O2, I/O3; Here, according to the different code values that receive, I/O1, I/O2, I/O3 export high-low level (CMOS level).During for high level, corresponding NPN type triode Q1, Q2, Q3 conducting, the parallel branch conducting of corresponding resistance R Q1, RQ2, RQ3.The value of all-in resistance RS changes, and the feedback voltage that collects changes, and IC1 regulates the pwm pulse duty ratio, by the duty ratio of the elementary square-wave voltage of drain D control transformer, regulates secondary output voltage with this, reaches the purpose of light modulation.When the conducting of NPN triode, collector electrode and emitter voltage Vce are very little, and electric current I ce is very big, and promptly the resistance between the collector and emitter is very little, can ignore.Here RQ1, RQ2, RQ3 value are different, and all-in resistance RS has 8 values.Embodiment adopts two-way and the LED of 6 1W that allies the communists, and light adjusting grade as required calculates the value of all-in resistance RS, determines the value of pointing out resistance R Q1, RQ2, RQ3 thus.Several kinds of compound modes below the resistance of RS is total:
Last table is the relation of the forward voltage of single LEDs with forward current, owing to be 8 grades of light modulations, we are designed to 8 magnitude of voltage: 1.8V with single led forward voltage, 1.9V, 2.0V, 2.1V, 2.2V, 2.3V, 2.4V, 2.5V.The total input voltage that is led array is 10.8V, 11.4V, 12V, 12.6V, 13.2V, 13.8V.According to the performance characteristics of voltage and IC1, can design the value of each resistance of feedback voltage sample circuit.Because during the triode conducting; Resistance is not to be desirably zero between collector electrode and the emitter, has certain impedance, and circuit is in practical application; The value of resistance R 1, R2, RQ1, RQ2, RQ3 need be done certain adjustment, and the value that makes all-in resistance RS is as far as possible near ideal value.Accurate control output voltage is so that the progression of light modulation is stablized more and produced a desired effect.Capacitor C Q1, CQ2, CQ3 can disturb by absorbing high-frequency, play the effect of stablizing the triode switch state.
Specification is made clearly explanation to the principle and the necessary technology of the utility model; Those of ordinary skill can be implemented fully in view of the above; Modules such as the PWM switching circuit of the utility model, remote signal reception decoding circuit 9 are all existing mature technology, so its internal structure that repeats no more.
Claims (3)
1. LED telecontrol dimmer; Comprise rectification circuit (1), prime filter circuit (2); It is characterized in that, comprise that also remote signal receives decoding circuit (9), feedback voltage Acquisition Circuit (7), transformer (5), PWM switching circuit (3), switching device (4) and secondary commutation filter circuit (6) and led circuit (8);
Said prime filter circuit (2) is through elementary winding of transformer (5) and switching device (4) earth level; PWM switching circuit (3) connects the control end of switching device (4); The output of the control termination feedback voltage Acquisition Circuit (7) of PWM switching circuit (3); Feedback voltage Acquisition Circuit (7) receives decoding circuit (9) with remote signal and is connected; Feedback voltage Acquisition Circuit (7) connects the second subprime winding of transformer (5), and first secondary winding of transformer (5) connects led circuit (8) through secondary commutation and filter circuit.
2. LED telecontrol dimmer as claimed in claim 1; It is characterized in that; Said feedback voltage Acquisition Circuit (7) comprises a plurality of parallel resistor switching branches, and each branch road comprises the resistance and the switch of series connection, and the control termination remote signal of switch receives decoding circuit (9).
3. LED telecontrol dimmer as claimed in claim 1 is characterized in that, said switching device (4) is metal oxide semiconductor field effect tube MOSFET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200335026U CN202111896U (en) | 2011-01-30 | 2011-01-30 | LED remote control light modulation apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200335026U CN202111896U (en) | 2011-01-30 | 2011-01-30 | LED remote control light modulation apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN202111896U true CN202111896U (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200335026U Expired - Fee Related CN202111896U (en) | 2011-01-30 | 2011-01-30 | LED remote control light modulation apparatus |
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| CN (1) | CN202111896U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102858068A (en) * | 2012-09-20 | 2013-01-02 | 石家庄开发区华北集成电路设计有限公司 | Parallel-switch-controlled variable load LED (light-emitting diode) driving circuit |
| CN103249220A (en) * | 2012-02-13 | 2013-08-14 | 松下电器产业株式会社 | Semiconductor light emitting element drive device and lighting fixture with the same |
| CN103298200A (en) * | 2012-02-24 | 2013-09-11 | 立锜科技股份有限公司 | Light emitting device driver circuit and control method thereof |
| CN103338550A (en) * | 2013-05-25 | 2013-10-02 | 广西大学 | Dimmable LED lamp driver circuit with remote control, and control method thereof |
| CN104703340A (en) * | 2013-12-04 | 2015-06-10 | 松下知识产权经营株式会社 | Lighting unit, lamp and illumination control system |
-
2011
- 2011-01-30 CN CN2011200335026U patent/CN202111896U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103249220A (en) * | 2012-02-13 | 2013-08-14 | 松下电器产业株式会社 | Semiconductor light emitting element drive device and lighting fixture with the same |
| CN103249220B (en) * | 2012-02-13 | 2014-12-31 | 松下电器产业株式会社 | Semiconductor light emitting element drive device and lighting fixture with the same |
| CN103298200A (en) * | 2012-02-24 | 2013-09-11 | 立锜科技股份有限公司 | Light emitting device driver circuit and control method thereof |
| CN103298200B (en) * | 2012-02-24 | 2015-08-12 | 立锜科技股份有限公司 | Light emitting element driving circuit and control method thereof |
| TWI510131B (en) * | 2012-02-24 | 2015-11-21 | Richtek Technology Corp | Light emitting device driver circuit and control method thereof |
| CN102858068A (en) * | 2012-09-20 | 2013-01-02 | 石家庄开发区华北集成电路设计有限公司 | Parallel-switch-controlled variable load LED (light-emitting diode) driving circuit |
| CN102858068B (en) * | 2012-09-20 | 2015-03-25 | 河北新华北集成电路有限公司 | Parallel-switch-controlled variable load LED (light-emitting diode) driving circuit |
| CN103338550A (en) * | 2013-05-25 | 2013-10-02 | 广西大学 | Dimmable LED lamp driver circuit with remote control, and control method thereof |
| CN104703340A (en) * | 2013-12-04 | 2015-06-10 | 松下知识产权经营株式会社 | Lighting unit, lamp and illumination control system |
| CN104703340B (en) * | 2013-12-04 | 2017-09-29 | 松下知识产权经营株式会社 | Lamp device, ligthing paraphernalia and Lighting Control Assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20140130 |