CN103052206A - Controller for LED (Light Emitting Diode) luminance - Google Patents
Controller for LED (Light Emitting Diode) luminance Download PDFInfo
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- CN103052206A CN103052206A CN2012102656247A CN201210265624A CN103052206A CN 103052206 A CN103052206 A CN 103052206A CN 2012102656247 A CN2012102656247 A CN 2012102656247A CN 201210265624 A CN201210265624 A CN 201210265624A CN 103052206 A CN103052206 A CN 103052206A
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Abstract
The invention discloses a controller for LED (Light Emitting Diode) luminance, which comprises a signal input circuit, a signal output circuit, a first resistor, a second resistor, a third resistor, a first triode and a second triode, wherein a base electrode of the first triode is connected with a collector electrode of the second triode; the signal input circuit is connected with a circuit between the base electrode of the first triode and the collector electrode of the second triode; one end of the first resistor is connected with the circuit between the base electrode of the first triode and the collector electrode of the second triode while the other end is grounded; the two ends of the third resistor are respectively connected with an emitter electrode of the first triode and the base electrode of the second triode; one end of the second resistor is connected with the circuit between the third resistor and the base electrode of the second triode while the other end is grounded; and the signal output circuit is connected with the collector electrode of the first triode. Such a structure is adopted by the controller for the LED luminance, the whole structure is simple and the occupied space is less. The cost of the components forming the controller is low, so that the cost of the controller is low.
Description
Technical field
The present invention relates to voltage regulating device, specifically the lumination of light emitting diode brightness controller.
Background technology
LED(Light Emitting Diode), i.e. light-emitting diode, it is a kind of solid-state semiconductor device, it can directly be converted into light to electricity.The heart of LED is a semi-conductive wafer, and an end of wafer is attached on the support, and an end is negative pole, and the other end connects the positive pole of power supply, makes whole wafer by epoxy encapsulation.Semiconductor wafer is comprised of two parts, and a part is P type semiconductor, occupies an leading position in its hole, the inside, and the other end is N type semiconductor, mainly is electronics here, but these two kinds of semiconductors just form one " P-N knot " when coupling together between them.When electric current acted on this wafer by wire, electronics will be pushed to the P district, and electronics is with hole-recombination in the P district, then will send energy with the form of photon, the luminous principle of LED that Here it is, and light wavelength determines the color of light, determines by forming P-N knot material.
Development along with electronic technology, the application of LED in electronic product is more and more general, in the electronic products such as automobile, mobile phone, for the brightness that guarantees LED can be not dimmed with the decline of cell voltage, in being set, the electronic product of LED generally is provided with now low pressure difference linear voltage regulator, yet, low pressure difference linear voltage regulator is set in electronic product, its space that occupies is large and cost is high, thereby has strengthened the electronic product cost that produces.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of lumination of light emitting diode brightness controller little and that cost is low that takes up space is provided.
Purpose of the present invention is achieved through the following technical solutions: the lumination of light emitting diode brightness controller, comprise signal input line road, output line road, the first resistance, the second resistance, the first triode and the second triode, the base stage of described the first triode is connected with the collector electrode of the second triode, connection between described signal input line road and the first transistor base and the second transistor collector, connection between described the first resistance one end and the first transistor base and the second transistor collector, its other end ground connection; The two ends of described the 3rd resistance respectively with the emitter of the first triode be connected the base stage of triode and be connected, described the second resistance one end is connected its other end ground connection with connection line between the 3rd resistance and the second transistor base; Described output line road is connected with the collector electrode of the first triode.
The grounded emitter of described the second triode.
Described the first triode and the second triode are the NPN triode.
The present invention is arranged on the pcb board when arranging.The present invention is when using, and the signal input line road connects the level input, and the output line road connects the negative electrode of LED.The present invention changes between conducting and cut-off by the first triode, the second triode, thereby guarantees that light can not change to people's naked-eye brightness.
The present invention compared with prior art has the following advantages and beneficial effect: the present invention includes signal input line road, output line road, the first resistance, the second resistance, the 3rd resistance, the first triode and the second triode, overall structure of the present invention is simple, be convenient to realize, it is little to take up space, it is low to consist of element cost of the present invention, thereby so that cost of the present invention is low; The two ends of the 3rd resistance of the present invention respectively with the emitter of the first triode be connected the base stage of triode and be connected, by the shunting of the 3rd resistance, can avoid the second transistor base electric current too high, thereby can avoid the second triode to damage.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
The corresponding name of Reference numeral is called in the accompanying drawing: 1, signal input line road, 2, the output line road, R1, the first resistance, R2, the second resistance, R3, the 3rd resistance, Q1, the first triode, Q2, the second triode.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited to this.
Embodiment:
As shown in Figure 1, the lumination of light emitting diode brightness controller, comprise signal input line road 1, output line road 2, the first resistance R 1, the second resistance R 2, the 3rd resistance, the first triode Q1 and the second triode Q2, wherein, the first triode Q1 and the second triode Q2 are the NPN triode.The base stage of the first triode Q1 is connected with the collector electrode of the second triode Q2, connection between signal input line road 1 and the first triode Q1 base stage and the second triode Q2 collector electrode, it connects the level input, connection between the first resistance R 1 one ends and the first triode Q1 base stage and the second triode Q2 collector electrode, the first resistance R 1 other end ground connection.The concrete link position of the circuit between the first resistance R 1 and the first triode Q1 base stage and the second triode Q2 collector electrode is: circuit between signal input line road 1 and the first triode Q1 base stage and the second triode Q2 collector electrode consists of first node, and the first resistance R 1 is connected on the circuit between first node and the second triode Q2 collector electrode.The two ends of the 3rd resistance R 3 respectively with the emitter of the first triode Q1 be connected the base stage of triode Q2 and be connected, the second resistance R 2 one ends are connected its other end ground connection with connection line between the 3rd resistance R 3 and the second triode Q2 base stage.Output line road 2 is connected with the collector electrode of the first triode Q1, and it connects the negative electrode of LED, the grounded emitter of the second triode Q2.
Operation principle of the present invention: when 1 input high level of signal input line road, the first triode Q1 conducting, the negative electrode of LED is because the conducting ground connection of Q1, the LED conducting begins luminous, when the first triode Q1 was in conducting state, the base voltage of the second triode Q2 increased, the second triode Q2 conducting.After the second triode Q2 conducting with the direct ground connection of the base stage of the first triode Q1, cause the first triode Q1 to close, LED turn-offs, then the second triode Q2 is turned off, because this moment, control signal was in high level all the time, the second triode Q2 closes and has no progeny, the first triode Q1 opens conducting LED again, so circulation, according to the switching time of triode, the LED lamp is in high-frequency opening in the closing process all the time.
Decline along with the cell voltage that connects the LED anode, the drive current of LED diminishes, the brightness of LED is dimmed when the conducting of LED lamp, but open the shutoff cycle at one in (one-period i.e. two triodes is respectively opened and turn-offed once), the time that LED opens is elongated, the time that LED turn-offs shortens, this time is popular, although brightness is dimmed during the interior LED conducting of one-period, but because the time of LED conducting is elongated, the time that LED turn-offs shortens, in fact the average brightness of LED be do not have vicissitudinous.Because there are up to a hundred even hundreds of in such cycle in 1 second, people's naked eyes are to discover its flicker, only can think that the brightness of lamp does not change.
As mentioned above, then can well realize the present invention.
Claims (3)
1. lumination of light emitting diode brightness controller, it is characterized in that: comprise signal input line road (1), output line road (2), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the first triode (Q1) and the second triode (Q2), the base stage of described the first triode (Q1) is connected with the collector electrode of the second triode (Q2), connection between described signal input line road (1) and the first triode (Q1) base stage and the second triode (Q2) collector electrode, connection between described the first resistance (R1) end and the first triode (Q1) base stage and the second triode (Q2) collector electrode, its other end ground connection; The two ends of described the 3rd resistance (R3) respectively with the emitter of the first triode (Q1) be connected the base stage of triode (Q2) and be connected, described the second resistance (R2) end is connected its other end ground connection with connection line between the 3rd resistance (R3) and the second triode (Q2) base stage; Described output line road (2) is connected with the collector electrode of the first triode (Q1).
2. lumination of light emitting diode brightness controller according to claim 1 is characterized in that: the grounded emitter of described the second triode (Q2).
3. lumination of light emitting diode brightness controller according to claim 1 and 2, it is characterized in that: described the first triode (Q1) and the second triode (Q2) are the NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102656247A CN103052206A (en) | 2011-10-14 | 2012-07-30 | Controller for LED (Light Emitting Diode) luminance |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110311448 | 2011-10-14 | ||
| CN201110311448.1 | 2011-10-14 | ||
| CN2012102656247A CN103052206A (en) | 2011-10-14 | 2012-07-30 | Controller for LED (Light Emitting Diode) luminance |
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| Publication Number | Publication Date |
|---|---|
| CN103052206A true CN103052206A (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102656247A Pending CN103052206A (en) | 2011-10-14 | 2012-07-30 | Controller for LED (Light Emitting Diode) luminance |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201097468Y (en) * | 2007-05-09 | 2008-08-06 | 李广 | LED light source circuit |
| CN202231928U (en) * | 2011-10-14 | 2012-05-23 | 成都锐奕信息技术有限公司 | Brightness control device of light emitting diode (LED) light |
| CN202679758U (en) * | 2012-07-30 | 2013-01-16 | 成都锐奕信息技术有限公司 | Light emitting diode light-emission brightness controller |
-
2012
- 2012-07-30 CN CN2012102656247A patent/CN103052206A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201097468Y (en) * | 2007-05-09 | 2008-08-06 | 李广 | LED light source circuit |
| CN202231928U (en) * | 2011-10-14 | 2012-05-23 | 成都锐奕信息技术有限公司 | Brightness control device of light emitting diode (LED) light |
| CN202679758U (en) * | 2012-07-30 | 2013-01-16 | 成都锐奕信息技术有限公司 | Light emitting diode light-emission brightness controller |
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Application publication date: 20130417 |