CN202841636U - Equal duty cycle light-emitting diode (LED) pulsation driving power circuit - Google Patents
Equal duty cycle light-emitting diode (LED) pulsation driving power circuit Download PDFInfo
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- CN202841636U CN202841636U CN 201220511252 CN201220511252U CN202841636U CN 202841636 U CN202841636 U CN 202841636U CN 201220511252 CN201220511252 CN 201220511252 CN 201220511252 U CN201220511252 U CN 201220511252U CN 202841636 U CN202841636 U CN 202841636U
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Abstract
The utility model provides an equal duty cycle light-emitting diode (LED) pulsation driving power circuit which comprises a bridge rectifier, a current-limiting device, a control voltage sequential control device, and a LED light component, wherein an alternating current input end of the bridge rectifier is connected with the control voltage sequential control device. The control voltage sequential control device is connected with a control switch of the LED light component. The positive electrode of the bridge rectifier is connected with a current-limiting device and the LED component, and the negative electrode of the bridge rectifier is connected with ground. The equal duty cycle LED pulsation driving power circuit can make use ratio of the LED maximize and can lower product costs.
Description
[technical field]
The utility model belongs to the lighting apparatus field, is specifically related to a kind of equal duty ratio LED pulsation driving power circuit.
[background technology]
As shown in Figure 1, be the AC driven power circuit of prior art.
The sequence of light of LED is along with the rising of commutating voltage is luminous from top to bottom, and it is from top to bottom that commutating voltage extinguishes order when descending,
This causes nethermost LED fluorescent lifetime much larger than the LED of topmost, to such an extent as to the setting of electric current is very awkward.
Guarantee the safe current of bottom LED, uppermost LED needs very high electric current because ON time is very short, and the two can't be taken into account; Near with a winding topmost in order to take into account with regard to improving bottom one group initial conducting voltage, but this meeting further reduces the duty ratio of LED conducting, affects light efficiency.For obtaining identical brightness, because light efficiency is low, necessary multiplex LED causes cost to rise.Because when commutating voltage was low, the LED group was fully not luminous, is prone to scintillation.
[summary of the invention]
Technical problem to be solved in the utility model is to provide a kind of equal duty ratio LED pulsation driving power circuit, so that the maximization of the utilance of LED reduces product cost, and greatly alleviates scintillation.
The utility model solves the problems of the technologies described above by the following technical solutions:
The equal duty ratio LED driving power circuit of pulsing comprises a bridge rectifier, a current-limiting apparatus, a control voltage sequence control device, a LED lamp group; The input of described bridge rectifier connects described control voltage sequence control device, and described bridge rectifier output head anode connects described current-limiting apparatus and described LED lamp group, described bridge rectifier minus earth.
Further, described LED lamp group comprises several strings LED and control switch in parallel with LED also.
Further, current-limiting apparatus is the device of Limited Current, comprises resistance, current-limiting circuit.
Further, described current-limiting apparatus and LED lamp group are series relationship.
Further, described control voltage sequence control device comprises rectification filter circuit, a pulse voltage odd even decision circuitry, a current-limiting apparatus voltage drop detection circuit, a logic judging circuit, a switch control voltage output circuit; Described rectification circuit connects respectively described bridge rectifier, described pulse voltage odd even decision circuitry; Described pulse voltage odd even decision circuitry connects described logic judging circuit; Described logic judging circuit connects described switch control voltage output circuit; Described current-limiting apparatus voltage drop detection circuit connects described logic judging circuit; Described switch control voltage output circuit is connected to described LED lamp group.
Further, described control voltage sequence control device comprises a rectification filtering power circuit, a pulse voltage odd even decision circuitry, an input voltage detection circuit, a logic judging circuit, a switch control voltage output circuit; Described rectification filtering power circuit connects respectively described bridge rectifier, described pulse voltage odd even decision circuitry, described input voltage detection circuit; Described pulse voltage odd even decision circuitry connects described logic judging circuit; Described logic judging circuit connects described switch control voltage output circuit; Described input voltage detection circuit connects described logic judging circuit; Described switch control voltage output circuit is connected to described LED lamp group.
Further, described control voltage sequence control device comprises that one first half-wave rectifying circuit, one second is rushed the ripple rectification circuit, a half-wave voltage detects forward sequence output circuit, forward sequence control output circuit, reverse sequence control output circuit; Described the first half-wave rectifying circuit, second is rushed the ripple rectification circuit and all is connected to described bridge rectifier; Described the first half-wave rectifying circuit connects described half-wave voltage and detects the forward sequence output circuit, and described half-wave voltage detects the forward sequence output circuit and connects described forward sequence control output circuit, and described forward sequence control output circuit connects described LED lamp group; Described the second half-wave rectifying circuit connects described half-wave voltage and detects the reverse sequence output circuit, and described half-wave voltage detects the reverse sequence output circuit and connects described reverse sequence control output circuit, and described reverse sequence control output circuit connects described LED lamp group.
Described control voltage sequence control device is the control device of output control voltage in order, and output order forward, oppositely can control; The corresponding connection of control switch of the output of described control voltage sequence control device and LED lamp group.
The utility model has the advantage of: the luminous cumulative time of all LED is the same, so just can set a rational current value and send enough light by LED, so that the maximization of the utilance of LED reduces product cost.The luminous efficiency of LED is high and consistent, so the quantity of LED can be minimized, and cost.Because can realize complete period control, voltage still has LED luminous near 0, greatly alleviate scintillation.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is prior art LED AC driven power circuit diagram.
Fig. 2 is the utility model the first embodiment schematic diagram.
Fig. 3 is the utility model the second embodiment schematic diagram.
Fig. 4 is the utility model the 3rd embodiment schematic diagram.
[embodiment]
The first embodiment:
As shown in Figure 2, the equal duty ratio LED driving power circuit of pulsing comprises a bridge rectifier, a current-limiting apparatus, a control voltage sequence control device, a LED lamp group; The two ends of described bridge rectifier connect described control voltage sequence control device, anodal described current-limiting apparatus and described LED lamp group, the described bridge rectifier minus earth of connecting of described bridge rectifier.Described control voltage sequence control device comprises a rectification filtering power circuit, a pulse voltage odd even decision circuitry, a current-limiting apparatus voltage drop detection circuit, a logic judging circuit, a switch control voltage output circuit; Described rectification filtering power circuit connects respectively described bridge rectifier, described pulse voltage odd even decision circuitry; Described pulse voltage odd even decision circuitry connects described logic judging circuit; Described logic judging circuit connects described switch control voltage output circuit; Described current-limiting apparatus voltage drop detection circuit connects described logic judging circuit; Described switch control voltage output circuit is connected to described LED lamp group.
After the alternating current input, obtain DC power supply and pulse voltage by rectification filtering power circuit; The current limliting voltage drop detection circuit detects the magnitude of voltage of input, and the electric current of input is carried out current limliting; The pulse voltage of pulse voltage odd even decision circuitry after with rectification judged according to odd number cycle and even numbers cycle; Odd number cycle and even numbers cycle that logic judging circuit is judged according to pulse voltage odd even decision circuitry, respectively to switch control voltage follower circuit two differences of input and corresponding input voltage, LED lamp group according to two differences and corresponding input voltage with two opposite order lightening LED lamps, realization is between a complete ac period, the accumulative total fluorescent lifetime of each LED lamp is identical, so that the maximization of the utilance of LED reduces product cost.
The second embodiment:
As shown in Figure 3, the equal duty ratio LED driving power circuit of pulsing comprises a bridge rectifier, a current-limiting apparatus, a control voltage sequence control device, a LED lamp group; The two ends of described bridge rectifier connect described control voltage sequence control device, anodal described current-limiting apparatus and described LED lamp group, the described bridge rectifier minus earth of connecting of described bridge rectifier.Described control voltage sequence control device comprises a rectification filtering power circuit, a pulse voltage odd even decision circuitry, an input voltage detection circuit, a logic judging circuit, a switch control voltage output circuit; Described rectification filtering power circuit connects respectively described bridge rectifier, described pulse voltage odd even decision circuitry, described input voltage detection circuit; Described pulse voltage odd even decision circuitry connects described logic judging circuit; Described logic judging circuit connects described switch control voltage output circuit; Described input voltage detection circuit connects described logic judging circuit; Described switch control voltage output circuit is connected to described LED lamp group.
After the alternating current input, obtain DC power supply and pulse voltage by rectification filtering power circuit; Voltage detecting circuit detects the input voltage value after the rectification; The pulse voltage of pulse voltage odd even decision circuitry after with rectification judged according to odd number cycle and even numbers cycle; Odd number cycle and even numbers cycle that logic judging circuit is judged according to pulse voltage odd even decision circuitry, respectively to switch control voltage follower circuit two differences of input and corresponding input voltage, LED lamp group according to two differences and corresponding input voltage with two opposite order lightening LED lamps, realization is between a complete ac period, the fluorescent lifetime of each LED lamp is identical, so that the maximization of the utilance of LED reduces product cost.
The 3rd embodiment:
As shown in Figure 4, the equal duty ratio LED driving power circuit of pulsing comprises a bridge rectifier, a current-limiting apparatus, a control voltage sequence control device, a LED lamp group; The two ends of described bridge rectifier connect described control voltage sequence control device, anodal described current-limiting apparatus and described LED lamp group, the described bridge rectifier minus earth of connecting of described bridge rectifier.Comprise described control voltage sequence control device one first half-wave rectifying circuit, one second half-wave rectifying circuit, a half-wave voltage detect the forward sequence output circuit, a half-wave voltage detects reverse sequence output circuit, forward sequence control output circuit, reverse sequence control output circuit; Described the first half-wave rectifying circuit, the second half-wave rectifying circuit all are connected to described bridge rectifier input; Described the first half-wave rectifying circuit connects described half-wave voltage and detects the forward sequence output circuit, described half-wave voltage detects the forward sequence output circuit and connects described forward sequence control output circuit, described forward sequence control output circuit connects described LED lamp group, and realization LED lamp group forward is lighted order; Described the second half-wave rectifying circuit connects described half-wave voltage and detects the reverse sequence output circuit, described half-wave voltage detects the reverse sequence output circuit and connects described reverse sequence control output circuit, described reverse sequence control output circuit connects described LED lamp group, and realization LED lamp group forward is lighted order.
After the alternating current input, carry out halfwave rectifier by two half-wave rectification circuits (namely the first half-wave rectifying circuit and second is rushed the ripple rectification circuit), obtain respectively two corresponding input voltages (being positive half cycle and negative half period); Respectively two different and corresponding input voltages are input in the LED lamp group with reverse sequence control output circuit by forward sequence control output circuit; The positive-negative half-cycle of two correspondences that exchange is controlled output circuit with two opposite order lightening LED lamps by forward sequence control output circuit and reverse sequence, realization is between a complete ac period, the fluorescent lifetime of each LED lamp is identical, so that the maximization of the utilance of LED reduces product cost.
Among above three embodiment, described control voltage sequence control device is the control device of output control voltage in order, and output order forward, oppositely can control; The corresponding connection of control switch of the output of described control voltage sequence control device and LED lamp group.Described LED lamp group comprises several strings LED and control switch in parallel with LED also.Current-limiting apparatus is the device of Limited Current, comprises resistance, current-limiting circuit.Described current-limiting apparatus and LED lamp group are series relationship
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present utility model to its suitable variation or modification of doing.
Claims (8)
1. equal duty ratio LED pulsation driving power circuit is characterized in that: comprise a bridge rectifier, a current-limiting apparatus, a control voltage sequence control device, a LED lamp group;
The input of described bridge rectifier connects described control voltage sequence control device, and described bridge rectifier output head anode connects described current-limiting apparatus and described LED lamp group, described bridge rectifier negative pole of output end ground connection.
2. equal duty ratio LED as claimed in claim 1 pulsation driving power circuit is characterized in that: described control voltage sequence control device is the control device of output control voltage in order, and output order forward, oppositely can control; The corresponding connection of control switch of the output of described control voltage sequence control device and LED lamp group.
3. equal duty ratio LED as claimed in claim 1 pulsation driving power circuit is characterized in that: described LED lamp group comprise several strings and LED and the control switch in parallel with LED.
4. equal duty ratio LED as claimed in claim 1 pulsation driving power circuit, it is characterized in that: current-limiting apparatus is the device of Limited Current, comprises the circuit with identical function that resistance, current-limiting circuit or electronic circuit form.
5. equal duty ratio LED as claimed in claim 1 pulsation driving power circuit, it is characterized in that: described current-limiting apparatus and LED lamp group are series relationship.
6. equal duty ratio LED pulsation driving power circuit as claimed in claim 1, it is characterized in that: described control voltage sequence control device comprises rectification filter circuit, a pulse voltage odd even decision circuitry, a current-limiting apparatus voltage drop detection circuit, a logic judging circuit, a switch control voltage output circuit; Described rectification circuit connects respectively described bridge rectifier, described pulse voltage odd even decision circuitry; Described pulse voltage odd even decision circuitry connects described logic judging circuit; Described logic judging circuit connects described switch control voltage output circuit; Described current-limiting apparatus voltage drop detection circuit connects described logic judging circuit; Described switch control voltage output circuit is connected to described LED lamp group.
7. equal duty ratio LED pulsation driving power circuit as claimed in claim 1, it is characterized in that: described control voltage sequence control device comprises a rectification filtering power circuit, a pulse voltage odd even decision circuitry, an input voltage detection circuit, a logic judging circuit, a switch control voltage output circuit; Described rectification filtering power circuit connects respectively described bridge rectifier, described pulse voltage odd even decision circuitry, described input voltage detection circuit; Described pulse voltage odd even decision circuitry connects described logic judging circuit; Described logic judging circuit connects described switch control voltage output circuit; Described input voltage detection circuit connects described logic judging circuit; Described switch control voltage output circuit is connected to described LED lamp group.
8. equal duty ratio LED pulsation driving power circuit as claimed in claim 1, it is characterized in that: described control voltage sequence control device comprises that one first half-wave rectifying circuit, one second is rushed the ripple rectification circuit, a half-wave voltage detects forward sequence output circuit, forward sequence control output circuit, reverse sequence control output circuit; Described the first half-wave rectifying circuit, second is rushed the ripple rectification circuit and all is connected to described bridge rectifier; Described the first half-wave rectifying circuit connects described half-wave voltage and detects the forward sequence output circuit, and described half-wave voltage detects the forward sequence output circuit and connects described forward sequence control output circuit, and described forward sequence control output circuit connects described LED lamp group; Described the second half-wave rectifying circuit connects described half-wave voltage and detects the reverse sequence output circuit, and described half-wave voltage detects the reverse sequence output circuit and connects described reverse sequence control output circuit, and described reverse sequence control output circuit connects described LED lamp group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220511252 CN202841636U (en) | 2012-09-29 | 2012-09-29 | Equal duty cycle light-emitting diode (LED) pulsation driving power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220511252 CN202841636U (en) | 2012-09-29 | 2012-09-29 | Equal duty cycle light-emitting diode (LED) pulsation driving power circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202841636U true CN202841636U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220511252 Withdrawn - After Issue CN202841636U (en) | 2012-09-29 | 2012-09-29 | Equal duty cycle light-emitting diode (LED) pulsation driving power circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102905429A (en) * | 2012-09-29 | 2013-01-30 | 福州凡普科技有限公司 | Pulse-driven power circuit of LEDs (light emitting diodes) with equal duty ratio |
| CN111093303A (en) * | 2019-12-18 | 2020-05-01 | 矽诚科技股份有限公司 | LED lamp string sequencing method, LED lamp string system and LED lamp thereof |
-
2012
- 2012-09-29 CN CN 201220511252 patent/CN202841636U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102905429A (en) * | 2012-09-29 | 2013-01-30 | 福州凡普科技有限公司 | Pulse-driven power circuit of LEDs (light emitting diodes) with equal duty ratio |
| CN102905429B (en) * | 2012-09-29 | 2015-04-15 | 福州凡普科技有限公司 | Pulse-driven power circuit of LEDs (light emitting diodes) with equal duty ratio |
| CN111093303A (en) * | 2019-12-18 | 2020-05-01 | 矽诚科技股份有限公司 | LED lamp string sequencing method, LED lamp string system and LED lamp thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130327 Effective date of abandoning: 20150415 |
|
| RGAV | Abandon patent right to avoid regrant |