CN106604461A - Color LED lamp current control circuit in two modes - Google Patents
Color LED lamp current control circuit in two modes Download PDFInfo
- Publication number
- CN106604461A CN106604461A CN201611143171.5A CN201611143171A CN106604461A CN 106604461 A CN106604461 A CN 106604461A CN 201611143171 A CN201611143171 A CN 201611143171A CN 106604461 A CN106604461 A CN 106604461A
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- Prior art keywords
- resistance
- led lamp
- color led
- control circuit
- resistor
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
Abstract
The invention discloses a color LED lamp current control circuit in two modes, and the circuit is formed in the manner that a light adjustment circuit outputs a control level signal, and is electrically connected to a base electrode of a triode; a collector electrode of the triode is connected to a power supply through a third resistor, and is grounded through a fourth resistor; an emitter electrode of the triode is grounded; the collector electrode of the triode is connected to a grid electrode of an MOS tube; a drain electrode of the MOS tube is connected to one end of a sixth resistor and one end of a seventh resistor through a fifth resistor, and forms a current output end of a color lamp; the other end of the sixth resistor is connected to the power supply, and the other end of the seventh resistor is grounded; and the source electrode of the MOS tube is grounded. The circuit provided by the invention solves problems that a daytime mode and a nighttime mode needs different brightness of the color lamp in the prior and the current of the color LED lamp cannot be adjusted.
Description
Technical field
The present invention relates to color LED lamp current control circuit under both of which.
Background technology
Airbome liquid crystal display module typically can all design two kinds of mode of operations, day mode and night mode in design,
Night mode typically has night viewing compatible requirement.
Night viewing compatible also implies that the night vision imaging system system of enemy is difficult or impossible to find possess night vision a long way off
The luminous body of compatible performance.The light sources such as common incandescence, electroluminescent light, LCD MODULE and LED can be because of the IR for launching
(Infra-Red, infrared) light, including a small amount of HONGGUANG is in the receivable scope internal interference night vision imaging system of its night vision imaging system
System, and cause the generation of following phenomenon：(1) IR can cause the eyepiece of night vision device to produce halation phenomenon, reduce night vision imaging system
The readability of image；(2) excess IR can encourage the automatic light modulation device of night vision imaging system, and further reduce night vision imaging system
The sensitivity and resolution of system；(3) cabin inner light source reflects the IR for producing by display surface can cause night vision imaging system ghost image.
One is designed or poorly designed luminous body without compatibility of night vision, can produce the naked flash lamp effect under environment
Should, cause pilot to lose and regard, even result in night vision imaging system cisco unity malfunction or destruction.Therefore it is to be ensured that night vision imaging
System successful Application on board the aircraft, realizing for compatibility of night vision is most important.One good night viewing compatible sexual system, can be with
Ensure pilot in night flying, by directly visually obtaining interior of aircraft information, and can not reduce night vision imaging system
Image enhaucament ability, it is ensured that the normal work of night vision imaging system.
Now airbome liquid crystal display module backlight great majority meet night viewing compatible requirement using multi-colored led complementary color, get rid of
Traditional method that night vision-compatible light filter is installed in LCD MODULE is abandoned, night vision is met using multi-colored led complementary color simultaneous
Hold desired concrete grammar be by controller detect chromaticity transducer collection data adjusting the dim signal of polychromatic light.
The backlight of the general day mode of airbome liquid crystal display module is mixed using white lamp, orange lamp, blue lamp, night mould
Brightness required for formula is relatively low, and the backlight of general LCD MODULE night mode is mixed using orange lamp, green light, blue lamp tri coloured lantern
Conjunction mode.
Because day mode and night mode need color lamp brightness different, at color lamp two ends the certain situation of voltage is configured
Under, different value need to be designed by the electric current of color lamp under day mode and night mode both of which.
The content of the invention
It is an object of the invention to provide color LED lamp current control circuit under a kind of both of which, color under the both of which
Color LED current control circuit overcomes day mode of the prior art and night mode needs color lamp brightness different, nothing
The problem that method is adjusted to color LED lamp electric current.
To achieve these goals, the invention provides color LED lamp current control circuit under a kind of both of which, this two
Color LED lamp current control circuit includes under the pattern of kind：
Light adjusting circuit, audion, metal-oxide-semiconductor, the 6th resistance, the 7th resistance, 3rd resistor, the 4th resistance and the 5th resistance；
Wherein,
The light adjusting circuit output control level signal, and it is electrically connected to the base stage of the audion；The audion
Colelctor electrode is connected to power supply by 3rd resistor, and by the 4th resistance eutral grounding；The grounded emitter of the audion；Described three
The colelctor electrode of pole pipe is also attached to the grid of the metal-oxide-semiconductor, and the drain electrode of the metal-oxide-semiconductor is connected to described by the 5th resistance
One end of 6th resistance and one end of the 7th resistance, and form the current output terminal of connection color lamp；6th resistance
The other end is connected to power supply, the other end ground connection of the 7th resistance；The source ground of the metal-oxide-semiconductor.
Preferably, color LED lamp current control circuit also includes under the both of which：
Second resistance, one end of the second resistance is connected to the outfan of the light adjusting circuit, and the other end is connected to institute
State the base stage of audion.
Preferably, color LED lamp current control circuit also includes under the both of which：
First resistor, one end of the first resistor be connected to the light adjusting circuit outfan and the second resistance it
Between, the other end of the first resistor is connected to power supply.
Preferably, the power supply is the power supply for exporting 3.3V voltages.
Preferably, the light adjusting circuit is FPGA circuitry or single chip circuit.
Preferably, in the case of the high level signal that the light adjusting circuit is exported to the audion, the audion
Open, and the grounded-grid of the metal-oxide-semiconductor does not work；
In the case of the low level signal that the light adjusting circuit is exported to the audion, the audion does not work,
And the metal-oxide-semiconductor is opened.
By above-mentioned embodiment, the present invention can reduce power consumption, greatly improve back light unit and liquid crystal screen component
Between compatibility, and circuit realiration is simple, pure hardware circuit composition, real not using controller and other special chips
It is existing with low cost.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of description, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the circuit structure diagram of color LED lamp current control circuit under a kind of both of which for illustrating the present invention.
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
The present invention provides color LED lamp current control circuit under a kind of both of which, it is characterised in that under the both of which
Color LED lamp current control circuit includes：
Light adjusting circuit, audion, metal-oxide-semiconductor, the 6th resistance, the 7th resistance, 3rd resistor, the 4th resistance and the 5th resistance；
Wherein,
The light adjusting circuit output control level signal, and it is electrically connected to the base stage of the audion；The audion
Colelctor electrode is connected to power supply by 3rd resistor, and by the 4th resistance eutral grounding；The grounded emitter of the audion；Described three
The colelctor electrode of pole pipe is also attached to the grid of the metal-oxide-semiconductor, and the drain electrode of the metal-oxide-semiconductor is connected to described by the 5th resistance
One end of 6th resistance and one end of the 7th resistance, and form the current output terminal of connection color lamp；6th resistance
The other end is connected to power supply, the other end ground connection of the 7th resistance；The source ground of the metal-oxide-semiconductor.
By above-mentioned embodiment, as shown in figure 1, the electric current of orange lamp is produced by electric resistance partial pressure, during day mode：Net
The high level signal that D_N is the output of the controllers such as FPGA, single-chip microcomputer is designated as, Q1 (audion) opens work, the grid of Q2 (metal-oxide-semiconductor)
Pole is grounded, and does not work, and the electric current of orange lamp is the generation of R6 and R7 partial pressures；During night mode：It is FPGA, single-chip microcomputer etc. that network mark is D_N
The low level signal of controller output, Q1 (audion) does not work, and the grid of Q2 (metal-oxide-semiconductor) is beating for R3 and R4 partial pressures generation
The voltage of metal-oxide-semiconductor is opened, Q2 works, the electric current of orange lamp is that resistance is produced with R6 partial pressures after R5 and R7 in parallel, and electric current diminishes.Green light and
Blue lamp can be processed using identical control circuit.
In a kind of specific embodiment of the present invention, in order to realize preliminary partial pressure, color LED lamp under the both of which
Current control circuit also includes：
Second resistance, one end of the second resistance is connected to the outfan of the light adjusting circuit, and the other end is connected to institute
State the base stage of audion.
In this kind of embodiment, color LED lamp current control circuit also includes under the both of which：
First resistor, one end of the first resistor be connected to the light adjusting circuit outfan and the second resistance it
Between, the other end of the first resistor is connected to power supply.
In a kind of specific embodiment of the present invention, the power supply is the power supply for exporting 3.3V voltages.
In a kind of specific embodiment of the present invention, the light adjusting circuit is FPGA circuitry or single chip circuit.
The present invention a kind of specific embodiment in, the light adjusting circuit output high level signal to three pole
In the case of pipe, the audion is opened, and the grounded-grid of the metal-oxide-semiconductor does not work；
In the case of the low level signal that the light adjusting circuit is exported to the audion, the audion does not work,
And the metal-oxide-semiconductor is opened.
By above-mentioned embodiment, it is possible to achieve the regulation of the electric current of LED,
Because day mode and night mode need color lamp brightness different, at color lamp two ends the certain situation of voltage is configured
Under, different value need to be designed by the electric current of color lamp under day mode and night mode both of which.Therefore, present invention design
Color LED lamp current control circuit under both of which, so as to solve both of which under different voltages output.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, various letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The compound mode of energy is no longer separately illustrated.
Additionally, combination in any can also be carried out between a variety of embodiments of the present invention, as long as it is without prejudice to this
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (6)
1. a kind of color LED lamp current control circuit under both of which, it is characterised in that color LED lamp electricity under the both of which
Flow control circuit includes：
Light adjusting circuit, audion, metal-oxide-semiconductor, the 6th resistance, the 7th resistance, 3rd resistor, the 4th resistance and the 5th resistance；Wherein,
The light adjusting circuit output control level signal, and it is electrically connected to the base stage of the audion；The current collection of the audion
Pole is connected to power supply by 3rd resistor, and by the 4th resistance eutral grounding；The grounded emitter of the audion；The audion
Colelctor electrode be also attached to the grid of the metal-oxide-semiconductor, the drain electrode of the metal-oxide-semiconductor is connected to the described 6th by the 5th resistance
One end of resistance and one end of the 7th resistance, and form the current output terminal of connection color lamp；6th resistance it is another
End is connected to power supply, the other end ground connection of the 7th resistance；The source ground of the metal-oxide-semiconductor.
2. color LED lamp current control circuit under both of which according to claim 1, it is characterised in that two kinds of moulds
Color LED lamp current control circuit also includes under formula：
Second resistance, one end of the second resistance is connected to the outfan of the light adjusting circuit, and the other end is connected to described three
The base stage of pole pipe.
3. color LED lamp current control circuit under both of which according to claim 2, it is characterised in that two kinds of moulds
Color LED lamp current control circuit also includes under formula：
First resistor, one end of the first resistor is connected between the outfan of the light adjusting circuit and the second resistance,
The other end of the first resistor is connected to power supply.
4. color LED lamp current control circuit under both of which according to claim 1, it is characterised in that the power supply
To export the power supply of 3.3V voltages.
5. color LED lamp current control circuit under both of which according to claim 1, it is characterised in that the light modulation
Circuit is FPGA circuitry or single chip circuit.
6. color LED lamp current control circuit under both of which according to claim 1, it is characterised in that in the tune
The high level signal of optical circuit output in the case of the audion, open by the audion, and the grid of the metal-oxide-semiconductor connects
Ground does not work；
In the case of the low level signal that the light adjusting circuit is exported to the audion, the audion does not work, and institute
State metal-oxide-semiconductor opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143171.5A CN106604461B (en) | 2016-12-13 | 2016-12-13 | Color LED lamp current control circuit under both of which |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143171.5A CN106604461B (en) | 2016-12-13 | 2016-12-13 | Color LED lamp current control circuit under both of which |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106604461A true CN106604461A (en) | 2017-04-26 |
| CN106604461B CN106604461B (en) | 2018-09-21 |
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| CN201611143171.5A Active CN106604461B (en) | 2016-12-13 | 2016-12-13 | Color LED lamp current control circuit under both of which |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102811530A (en) * | 2011-06-02 | 2012-12-05 | 海洋王照明科技股份有限公司 | Voltage-rising type LED driving circuit and lamp |
| CN103747576A (en) * | 2013-12-27 | 2014-04-23 | 中航华东光电有限公司 | Driving circuit of LED backlight and driving method thererof |
| CN203797409U (en) * | 2014-03-14 | 2014-08-27 | 长城信息产业股份有限公司 | Night-vision-compatible bottom-light-type LED backlight source |
| US20140239814A1 (en) * | 2013-02-22 | 2014-08-28 | Luxul Technology Incorporation | Light-emitting diode lamp compatible with an electronic ballast generating preheating current |
| CN204117572U (en) * | 2014-09-24 | 2015-01-21 | 中航华东光电有限公司 | A kind of airbome liquid crystal display with night vision compatible function |
| CN204178088U (en) * | 2014-10-22 | 2015-02-25 | 天津通广集团振通电子有限公司 | A kind of intelligent backlight module possessing night vision compatible function |
-
2016
- 2016-12-13 CN CN201611143171.5A patent/CN106604461B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102811530A (en) * | 2011-06-02 | 2012-12-05 | 海洋王照明科技股份有限公司 | Voltage-rising type LED driving circuit and lamp |
| US20140239814A1 (en) * | 2013-02-22 | 2014-08-28 | Luxul Technology Incorporation | Light-emitting diode lamp compatible with an electronic ballast generating preheating current |
| CN103747576A (en) * | 2013-12-27 | 2014-04-23 | 中航华东光电有限公司 | Driving circuit of LED backlight and driving method thererof |
| CN203797409U (en) * | 2014-03-14 | 2014-08-27 | 长城信息产业股份有限公司 | Night-vision-compatible bottom-light-type LED backlight source |
| CN204117572U (en) * | 2014-09-24 | 2015-01-21 | 中航华东光电有限公司 | A kind of airbome liquid crystal display with night vision compatible function |
| CN204178088U (en) * | 2014-10-22 | 2015-02-25 | 天津通广集团振通电子有限公司 | A kind of intelligent backlight module possessing night vision compatible function |
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|---|---|
| CN106604461B (en) | 2018-09-21 |
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