CN203151806U - Driving circuit with for LED backlight - Google Patents
Driving circuit with for LED backlight Download PDFInfo
- Publication number
- CN203151806U CN203151806U CN 201320027877 CN201320027877U CN203151806U CN 203151806 U CN203151806 U CN 203151806U CN 201320027877 CN201320027877 CN 201320027877 CN 201320027877 U CN201320027877 U CN 201320027877U CN 203151806 U CN203151806 U CN 203151806U
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- circuit
- led
- backlit
- resistance
- input signal
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Abstract
The utility model provides a driving circuit for LED backlight. The driving circuit comprises a power supply, a boost circuit and an LED backlight circuit which are electrically connected in sequence. The driving circuit further comprises an input signal control module which is electrically connected with the boost circuit and the LED backlight circuit respectively. According to the utility model, the input signal control module is additionally arranged and is connected with the boost circuit and the LED backlight circuit, the boost circuit and the LED backlight circuit work under the action of a control signal of the input signal control module, and static energy loss of the boost circuit is effectively reduced.
Description
[technical field]
The utility model relates to a kind of drive circuit, refers in particular to a kind of LED-backlit drive circuit.
[background technology]
Driving light-emitting diode (being LED) need rise to voltage more than 3 volts by a booster circuit; Existing LED booster driving circuit does not have ground connection or thoroughly outage when static state, cause still existing when static state the loss of the low energy.
[summary of the invention]
The technical problems to be solved in the utility model is to provide a kind of LED-backlit drive circuit, and is simple in structure, effectively low current loss reduced.
The utility model is achieved in that a kind of LED-backlit drive circuit, comprises the power supply, booster circuit and the LED-backlit circuit that are electrically connected successively, and it is characterized in that: described drive circuit also comprises an input signal control module; Described input signal control module is electrically connected with described booster circuit, LED-backlit circuit respectively.
Preferable, described booster circuit comprises an inductance, a diode, an electric capacity and a boost module; Described power supply, inductance, diode, electric capacity are connected successively; The minus earth of described electric capacity; The two is in parallel with described diode for second pin, the three-prong of described boost module by this boost module.
Preferable, described LED-backlit circuit comprises one first resistance and a light-emitting diode; One end of described resistance is connected with the negative pole of described diode, the positive pole of electric capacity, second pin of boost module respectively, and the other end of this resistance is connected with the positive pole of described light-emitting diode; The negative pole of described light-emitting diode is connected with first pin of described boost module.
Preferable, described input signal control module comprises a microcontroller, one second resistance and a NPN triode; One end of described second resistance is connected with the signal controlling pin of described microcontroller, and the other end of this second resistance is connected with the base stage of described NPN triode; The collector electrode of described NPN triode is connected with first pin of described boost module, the negative pole of light-emitting diode respectively, and the grounded emitter of this NPN triode.
Advantage of the present utility model is: adding input signal control module is connected with described booster circuit, LED-backlit circuit will, control signal by this input signal control module makes booster circuit, LED-backlit circuit working, and effectively the static energy loss with booster circuit reduces.
[description of drawings]
In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.
Fig. 1 is the functional-block diagram that a kind of LED-backlit of the utility model is used drive circuit.
Fig. 2 is the electrical block diagram that a kind of LED-backlit of the utility model is used drive circuit.
[embodiment]
See also illustrated in figures 1 and 2, a kind of LED-backlit drive circuit 100, comprise the power supply 1(that is electrically connected successively as: the power supply of 1.5V), booster circuit 2 and LED-backlit circuit 3, it is characterized in that: described drive circuit 100 also comprises an input signal control module 4; Described input signal control module 4 is electrically connected with described booster circuit 2, LED-backlit circuit 3 respectively.By described input signal control module 4 control booster circuit 2 and LED-backlit circuit 3, when input signal control module no signal, represent that booster circuit 2 is in static state, this moment, effectively the loss with low current reduced with booster circuit 2 outages.
As shown in Figure 2, described booster circuit 2 comprises an inductance 21, a diode 22, an electric capacity 23 and a boost module 24; Described power supply 1, inductance 21, diode 22, electric capacity 23 4 are connected successively; The minus earth of described electric capacity 23; The two is in parallel with described diode 22 for second pin two 41 of described boost module 24 by this boost module 24, three-prong 242.This project organization is simple, and effectively the magnitude of voltage lifting with power supply 1 makes LED-backlit circuit 3 operate as normal.
As shown in Figure 2, described LED-backlit circuit 3 comprises one first resistance 31 and a light-emitting diode 32; One end of described resistance 31 is connected with the negative pole of described diode 22, the positive pole of electric capacity 23, second pin two 41 of boost module 24 respectively, and the other end of this resistance 31 is connected with the positive pole of described light-emitting diode 32; The negative pole of described light-emitting diode 32 is connected with first pin two 43 of described boost module 24.This design simple in structure, cost is low.
As shown in Figure 2, described input signal control module 4 comprises a microcontroller (not shown), one second resistance 41 and a NPN triode 42; One end of described second resistance 41 is connected with the signal controlling pin 43 of described microcontroller, and 41 other ends of this second resistance are connected with the base stage of described NPN triode 42; The collector electrode of described NPN triode 42 is connected with first pin two 43 of described boost module 24, the negative pole of light-emitting diode 32 respectively, and the grounded emitter of this NPN triode 42.
The utility model is when using, boost module is sent the control INPUT signal that transmits from microcontroller by having increased the NPN triode, the NPN triode can thoroughly be cut off the power supply when booster circuit is in static state, therefore can effectively low current loss be reduced to zero.
Though more than described embodiment of the present utility model; but being familiar with those skilled in the art is to be understood that; our described specific embodiment is illustrative; rather than for the restriction to scope of the present utility model; those of ordinary skill in the art are in modification and the variation of the equivalence of doing according to spirit of the present utility model, all should be encompassed in the scope that claim of the present utility model protects.
Claims (4)
1. a LED-backlit drive circuit comprises the power supply, booster circuit and the LED-backlit circuit that are electrically connected successively, and it is characterized in that: described drive circuit also comprises an input signal control module; Described input signal control module is electrically connected with described booster circuit, LED-backlit circuit respectively.
2. a kind of LED-backlit drive circuit as claimed in claim 1, it is characterized in that: described booster circuit comprises an inductance, a diode, an electric capacity and a boost module; Described power supply, inductance, diode, electric capacity are connected successively; The minus earth of described electric capacity; The two is in parallel with described diode for second pin, the three-prong of described boost module by this boost module.
3. a kind of LED-backlit drive circuit as claimed in claim 2, it is characterized in that: described LED-backlit circuit comprises one first resistance and a light-emitting diode; One end of described resistance is connected with the negative pole of described diode, the positive pole of electric capacity, second pin of boost module respectively, and the other end of this resistance is connected with the positive pole of described light-emitting diode; The negative pole of described light-emitting diode is connected with first pin of described boost module.
4. a kind of LED-backlit drive circuit as claimed in claim 3, it is characterized in that: described input signal control module comprises a microcontroller, one second resistance and a NPN triode; One end of described second resistance is connected with the signal controlling pin of described microcontroller, and the other end of this second resistance is connected with the base stage of described NPN triode; The collector electrode of described NPN triode is connected with first pin of described boost module, the negative pole of light-emitting diode respectively, and the grounded emitter of this NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320027877 CN203151806U (en) | 2013-01-18 | 2013-01-18 | Driving circuit with for LED backlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320027877 CN203151806U (en) | 2013-01-18 | 2013-01-18 | Driving circuit with for LED backlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203151806U true CN203151806U (en) | 2013-08-21 |
Family
ID=48979293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320027877 Expired - Fee Related CN203151806U (en) | 2013-01-18 | 2013-01-18 | Driving circuit with for LED backlight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203151806U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106354075A (en) * | 2016-11-25 | 2017-01-25 | 北京意同创科技有限公司 | Control circuit of remote controller with backlight screen |
-
2013
- 2013-01-18 CN CN 201320027877 patent/CN203151806U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106354075A (en) * | 2016-11-25 | 2017-01-25 | 北京意同创科技有限公司 | Control circuit of remote controller with backlight screen |
| CN106354075B (en) * | 2016-11-25 | 2020-01-21 | 北京意同创科技有限公司 | Remote controller control circuit with backlight screen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20160118 |
|
| EXPY | Termination of patent right or utility model |