CN106255267A - A kind of outdoor LED large display screen signal level adjustment type light control system - Google Patents
A kind of outdoor LED large display screen signal level adjustment type light control system Download PDFInfo
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- CN106255267A CN106255267A CN201610726595.8A CN201610726595A CN106255267A CN 106255267 A CN106255267 A CN 106255267A CN 201610726595 A CN201610726595 A CN 201610726595A CN 106255267 A CN106255267 A CN 106255267A
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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 kind of outdoor LED large display screen signal level adjustment type light control system, it is characterized in that: main by control chip U1, luminance sensor RL, audion VT1, diode D1, polar capacitor C1, signal level regulation circuit, multiplication of voltage adjusts circuit, self-maintained circuit, and adjusts, with the VCC pin of control chip U1 and self-maintained circuit and multiplication of voltage, the delay switch circuit composition that circuit is connected respectively.Interference signal in the signal of luminance sensor RL output can be suppressed or eliminate by the present invention, the level making the signal of input keeps stable, and the present invention can also effectively reduce Leakage Current and loss current, and the unusual fluctuations of electric current can be suppressed, output ripple current is made to keep stable, thus effectively raise the present invention accuracy to signal processing, improve the stability of the voltage and current of present invention output.
Description
Technical field
The present invention relates to energy-saving field, specifically refer to a kind of outdoor LED large display screen signal level adjustment type light-operated
System.
Background technology
LED digitizer tablet soft light, is that one utilizes low-power LED to form face light, and combines high transmission rate softbox
The new generation of green environmental protection light source formed.It is soft, uniform that LED digitizer tablet soft light has illumination, without infrared ray, ultraviolet
Line, surface brightness is less than three-color fluorescent lamp, free from glare, the characteristic such as the most dazzling.LED digitizer tablet soft light is had because of it
Above-mentioned characteristic and be widely used in the illumination of outdoor large display screen, former this outdoor LED large display screen use time many
Use the artificial open and close to LED, i.e. by manually controlling LED closedown on daytime and unlatching in evening, along with science and technology
Development, the artificial control mode opened and closed that outdoor LED large display screen is used is then by a kind of LED light control system
System is substituted；This LED light Ore-controlling Role is by the ambient brightness to outdoor LED large display screen of the luminance sensor in system
The result of detection control the open and close of LED.
But, the light control system that existing outdoor LED large display screen is used is inaccurate to signal processing, causes light-operated
The precise control that the LED of outdoor LED large display screen is opened and closed by system is poor, the most can accurately not control open air
The LED of LED large display screen is automatically switched off by day, and automatically turn in the evening, causes the substantial amounts of waste of electric power resource；And it is existing
The light control system that some outdoor LED large display screens are used there is also asking of the driving voltage of output and the poor stability of electric current
Topic, causes LED large display screen flicker, the serious service life that have impact on LED large display screen occur.
Therefore it provides signal can accurately be processed by one, the family of stable driving voltage and electric current can be exported again
Outer LED large display screen light control system is the task of top priority.
Summary of the invention
The light control system that it is an object of the invention to overcome existing outdoor LED large display screen to be used is to signal processing
Inaccurate, and the defect of the poor stability of the driving voltage that exports and electric current, it is provided that a kind of outdoor LED large display screen is believed
Number level adjustment type light control system.
The purpose of the present invention is by following technical proposals reality: a kind of outdoor LED large display screen signal level regulates
Type light control system, mainly by control chip U1, luminance sensor RL, audion VT1, the TRHIG pipe of negative pole and control chip U1
The polar capacitor C2 that foot is connected, positive pole is connected with the REST pin of control chip U1 after resistance R1, with polar capacitor C2
The signal level regulation circuit that is connected of positive pole, N pole is connected with the emitter stage of audion VT1, P pole is through inductance L1 and brightness
The diode D1 being connected with signal level regulation circuit after sensor RL, positive pole is connected with the base stage of audion VT1, negative pole
The polar capacitor C1 that is connected with the REST pin of control chip U1, respectively with signal level regulation circuit and control chip U1
The multiplication of voltage that THRE pin and CONT pin are connected with OUT pin adjusts circuit, is connected with the OUT pin of control chip U1
Self-maintained circuit, and adjust circuit phase with the VCC pin of control chip U1 and self-maintained circuit and multiplication of voltage respectively
The delay switch circuit composition connected；The VCC pin of described control chip U1 respectively with REST pin and the current collection of audion VT1
Pole is connected, its DNG pin ground connection.
Described signal level regulation circuit is by field effect transistor MOS2, audion VT7, amplifier P, and positive pole is after resistance R25
Be connected with the source electrode of field effect transistor MOS2, polar capacitor that negative pole colelctor electrode with audion VT7 after inductance L4 is connected
C14, P pole is connected with the source electrode of field effect transistor MOS2, N pole is connected with the grid of field effect transistor MOS2 after resistance R26
Diode D11, positive pole grid with field effect transistor MOS2 after resistance R27 is connected, the drain electrode of negative pole and field effect transistor MOS2
The polar capacitor C15 of ground connection after being connected, one end is connected with the grid of field effect transistor MOS2, the resistance R28 of other end ground connection,
Polar capacitor C16, the P pole warp that positive pole is connected with the grid of field effect transistor MOS2, negative pole is connected with the positive pole of amplifier P can
Adjust after resistance R30 be connected with the base stage of audion VT7, two poles that N pole negative pole with amplifier P after resistance R31 is connected
Pipe D12, P pole emitter stage with audion VT7 after resistance R29 is connected, N pole after resistance R34 with the outfan of amplifier P
The diode D13 being connected, positive pole is connected with the P pole of diode D13, negative pole after resistance R33 with the outfan of amplifier P
The polar capacitor C17 being connected, and positive pole is connected with the outfan of amplifier P, negative pole after resistance R32 with amplifier P
Negative pole be connected after ground connection polar capacitor C18 composition；The source electrode of described field effect transistor MOS2 is the most sequentially through luminance sensor
After RL and inductance L1, the P pole with diode D1 is connected；The source electrode of described field effect transistor MOS2 also adjusts circuit with multiplication of voltage and is connected
Connect；The positive pole of described diode D12 and polar capacitor C16 is connected；The outfan of described amplifier P is also with polar capacitor C2's
Positive pole is connected.
Described multiplication of voltage adjusts circuit and is connected with the THRE pin of control chip U1 by audion VT2, audion VT3, N pole
Connect, diode D2 that P pole base stage with audion VT2 after resistance R2 is connected, positive pole after resistance R3 with the P of diode D2
Polar capacitor C3, the P pole that pole is connected, negative pole base stage with audion VT3 after inductance L2 is connected is sent out with audion VT2's
The diode D3 that emitter-base bandgap grading is connected, N pole is sequentially connected through adjustable resistance R4 positive pole with polar capacitor C3 after resistance R5, just
Pole polar capacitor that positive pole is connected, negative pole is connected with the colelctor electrode of audion VT3 with polar capacitor C3 after resistance R6
The diode D4 that C4, N pole is connected with the colelctor electrode of audion VT3, P pole is connected with the positive pole of polar capacitor C3, one end with
The resistance R7 that the negative pole of polar capacitor C3 is connected, the other end is connected with the P pole of diode D4, and positive pole is after resistance R8
Be connected with the OUT pin of control chip U1, negative pole be connected with the colelctor electrode of audion VT3 after the polar capacitor C5 group of ground connection
Become；The described colelctor electrode of audion VT2 is connected with the source electrode of field effect transistor MOS2；The emitter stage of described audion VT3 and control
The CONT pin of coremaking sheet U1 is connected, its colelctor electrode is also connected with self-maintained circuit.
Described self-maintained circuit by the chip U2 that vibrates, audion VT4, audion VT5, P pole after resistance R13 with vibration
The Vdd pin of chip U2 is connected, the output of N pole is connected through resistance R14 emitter stage with audion VT5 after resistance R15
Diode D7, negative pole with vibration chip U2 CP0 pin be connected, positive pole after resistance R12 with vibration chip U2 CP1 pin
The polar capacitor C7 being connected, is serially connected in switch S, the P pole between the positive pole of polar capacitor C7 and the CP2 pin of vibration chip U2
The diode that Vdd pin with vibration chip U2 is connected after resistance R9, N pole is connected with the VSS pin of vibration chip U2
D5, positive pole after resistance R10 with vibration chip U2 the pole that Vdd pin is connected, negative pole is connected with the base stage of audion VT4
Property electric capacity C6, negative pole is connected with the base stage of audion VT5, positive pole is connected with the Q14 pin of vibration chip U2 polarity electricity
Hold C8, and P pole is connected with the CP1 pin of vibration chip U2, N pole emitter stage with audion VT4 after resistance R11 is connected
The diode D6 composition connect；The Vdd pin of described vibration chip U2 is also connected with the OUT pin of control chip U1；Described shake
The R pin swinging chip U2 is connected with Vdd pin, its CP2 pin also positive pole with polar capacitor C7 is connected；Described vibration core
The VSS pin of sheet U2 is connected with colelctor electrode and the delay switch circuit of audion VT3 the most respectively；The collection of described audion VT4
Electrode ground connection；The N pole of described diode D5 also positive pole with polar capacitor C6 is connected；The N pole of described diode D6 also with shake
The Q14 pin swinging chip U2 is connected；The colelctor electrode of described audion VT5 is connected with delay switch circuit.
Described delay switch circuit is by field effect transistor MOS1, audion VT6, bidirectional thyristor V, one end and audion VT5
Resistance R16, the P pole that colelctor electrode is connected, the other end is connected with the adjustable side of bidirectional thyristor V after resistance R17 with double
The diode D8 that the first anode to IGCT V is connected, N pole is connected with the VSS pin of vibration chip U2, negative pole is with two-way
The polar capacitor C10 that the second plate of IGCT V is connected, positive pole is connected with the N pole of diode D8 after resistance R18, just
The polar capacitor C9 that pole is connected with the N pole of diode D8, negative pole is connected with the colelctor electrode of audion VT6, negative pole and three poles
The polar capacitor C11, N that the emitter stage of pipe VT6 is connected, positive pole is connected with the drain electrode of field effect transistor MOS1 after resistance R21
Pole colelctor electrode with audion VT6 after resistance R19 is connected, P pole grid with field effect transistor MOS1 after resistance R22 is connected
The diode D9 connect, positive pole is connected with the P pole of diode D9, negative pole colelctor electrode with audion VT6 after resistance R20 is connected
The polar capacitor C12 connect, positive pole source electrode with field effect transistor MOS1 after resistance R23 is connected, negative pole and field effect transistor MOS1
The polar capacitor C13 that is connected of grid, one end is connected with the source electrode of field effect transistor MOS1, the other end is with control chip U1's
The inductance L3 that VCC pin is connected, and N pole is connected with the positive pole of polar capacitor C13, P pole after resistance R24 with field effect
The Zener diode D10 composition that the grid of pipe MOS1 is connected；The base stage of described audion VT6 and the positive pole of polar capacitor C10
It is connected；The N pole of described diode D9 also negative pole with polar capacitor C9 be connected after ground connection；The of described bidirectional thyristor V
The P pole of two anodes and Zener diode D10 collectively constitutes the outfan of delay switch circuit.
For the practical effect of the present invention, described control chip U1 the most preferentially have employed the integrated chip of IC555 and comes real
Existing；Meanwhile, described vibration chip U2 the most preferentially have employed the integrated chip of CD4060 and realizes.
The present invention compared with prior art has the following advantages and beneficial effect:
(1) the interference signal in the signal of luminance sensor RL output can be suppressed or eliminate by the present invention, makes input
The level of signal keep stable, effectively raise the present invention accuracy to signal processing；And the present invention can also be effective
Reduction Leakage Current and loss current, and the unusual fluctuations of electric current can be suppressed, make output ripple current keep stable,
Thus improve the stability of the voltage and current of present invention output.
(2) dutycycle of the square-wave signal in the signal of telecommunication that luminance sensor RL can be transmitted by the present invention is adjusted
Whole, make the overall level held stationary of the signal of telecommunication, it is ensured that control chip U1 can receive signal accurately, thus improves this
The bright accuracy to signal processing.
(3) the control chip U1 of the present invention the most preferentially have employed the integrated chip of IC555 and realizes, this chip and external electrical
Element combines, and can effectively load the interference of external electromagnetic ripple signal, makes the control chip U1 can be exactly to luminance sensor
The signal that RL is transmitted is analyzed processing, thus improves the present invention and open the LED of outdoor LED large display screen and close
Close and be controlled, effectively save electric power resource.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the signal level regulation circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to
This.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U1, luminance sensor RL, audion VT1, resistance R1, inductance
L1, polar capacitor C1, polar capacitor C2, diode D1, signal level regulation circuit, multiplication of voltage adjustment circuit, self-maintained circuit,
And delay switch circuit composition.
During connection, the negative pole of polar capacitor C2 is connected with the TRHIG pin of control chip U1, positive pole after resistance R1 with
The REST pin of control chip U1 is connected.Signal level regulation circuit is connected with the positive pole of polar capacitor C2.Diode D1
N pole be connected with the emitter stage of audion VT1, P pole after inductance L1 and luminance sensor RL with signal level regulate circuit
It is connected.The positive pole of polar capacitor C1 is connected with the base stage of audion VT1, and negative pole is connected with the REST pin of control chip U1
Connect.
Wherein, multiplication of voltage adjusts circuit and regulates circuit and the THRE pin of control chip U1 and CONT with signal level respectively
Pin is connected with OUT pin.Self-maintained circuit is connected with the OUT pin of control chip U1.Delay switch circuit is respectively
Adjust circuit be connected with the VCC pin of control chip U1 and self-maintained circuit and multiplication of voltage.
The VCC pin of described control chip U1 colelctor electrode with REST pin and audion VT1 respectively is connected, its DNG
Pin ground connection.For the practical effect of the present invention, described control chip U1 the most preferentially have employed the integrated chip of IC555 and comes real
Existing.The external power source of the present invention is 12V DC voltage.
During enforcement, audion VT1, polar capacitor C1, polar capacitor C2, resistance R1, inductance L1 and diode D1 defines
Impedor, the interference signal in the signal that luminance sensor RL can effectively be transmitted by this impedor carries out suppressing or eliminating,
The level making input signal keeps stable, it is ensured that the accuracy of the signal that control chip U1 receives, its control chip U1 is just
The monochrome information received can be analyzed accurately and processed, ensure that the present invention can be to outdoor LED large display screen
LED open and close be controlled.
Further, described multiplication of voltage adjusts circuit by audion VT2, audion VT3, resistance R2, resistance R3, adjustable resistance
R4, resistance R5, resistance R6, resistance R7, resistance R8, polar capacitor C3, polar capacitor C4, polar capacitor C5, diode D2, two poles
Pipe D3, diode D4, and inductance L2 form.
During connection, the N pole of diode D2 is connected with the THRE pin of control chip U1, P pole after resistance R2 with three poles
The base stage of pipe VT2 is connected.The positive pole of polar capacitor C3 P pole with diode D2 after resistance R3 is connected, and negative pole is through inductance
After L2, the base stage with audion VT3 is connected.The P pole of diode D3 is connected with the emitter stage of audion VT2, N pole sequentially warp
After adjustable resistance R4 and resistance R5, the positive pole with polar capacitor C3 is connected.
Meanwhile, the positive pole of polar capacitor C4 positive pole with polar capacitor C3 after resistance R6 is connected, negative pole and audion
The colelctor electrode of VT3 is connected.The N pole of diode D4 is connected with the colelctor electrode of audion VT3, and P pole is with polar capacitor C3 just
Pole is connected.One end of resistance R7 is connected with the negative pole of polar capacitor C3, and the other end is connected with the P pole of diode D4.Pole
The positive pole of property electric capacity C5 OUT pin with control chip U1 after resistance R8 is connected, the colelctor electrode phase of negative pole and audion VT3
Ground connection after connection.
The described colelctor electrode of audion VT2 is connected with the source electrode of field effect transistor MOS2；The emitter stage of described audion VT3
Being connected with the CONT pin of control chip U1, its colelctor electrode is also connected with self-maintained circuit.
Further, described self-maintained circuit, by the chip U2 that vibrates, audion VT4, audion VT5, switchs S, electricity
Resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, polar capacitor C6, polar capacitor C7, pole
Property electric capacity C8, inductance L3, diode 5, diode D6, and diode D7 composition.
During connection, the P pole of diode D7 after resistance R13 with vibration chip U2 Vdd pin be connected, N pole output warp
After resistance R14 and resistance R15, the emitter stage with audion VT5 is connected.The negative pole of polar capacitor C7 and the CP0 of vibration chip U2
Pin is connected, positive pole after resistance R12 with vibration chip U2 CP1 pin be connected.Switch S is serially connected in polar capacitor C7's
Between the CP2 pin of positive pole and vibration chip U2.
Wherein, the P pole of diode D5 after resistance R9 with vibration chip U2 Vdd pin be connected, N pole with vibration chip
The VSS pin of U2 is connected.The positive pole of polar capacitor C6 after resistance R10 with vibration chip U2 Vdd pin be connected, negative pole
It is connected with the base stage of audion VT4.The negative pole of polar capacitor C8 is connected with the base stage of audion VT5, positive pole and vibration core
The Q14 pin of sheet U2 is connected.The P pole of diode D6 with vibration chip U2 CP1 pin be connected, N pole after resistance R11 with
The emitter stage of audion VT4 is connected.
The Vdd pin of described vibration chip U2 is also connected with the OUT pin of control chip U1；Described vibration chip U2's
R pin is connected with Vdd pin, and its CP2 pin also positive pole with polar capacitor C7 is connected；The VSS of described vibration chip U2
Pin is connected with colelctor electrode and the delay switch circuit of audion VT3 the most respectively；The grounded collector of described audion VT4；
The N pole of described diode D5 also positive pole with polar capacitor C6 is connected；The N pole of described diode D6 is also with vibration chip U2's
Q14 pin is connected；The colelctor electrode of described audion VT5 is connected with delay switch circuit.
Yet further, described delay switch circuit is by field effect transistor MOS1, audion VT6, bidirectional thyristor V, resistance
R16, resistance R17, resistance R18, resistance R19, resistance R20, resistance R21, resistance R22, resistance R23, resistance R24, polar capacitor
C9, polar capacitor C10, polar capacitor C11, polar capacitor C12, diode D8, diode D9, and Zener diode D10 group
Become.
During connection, one end of resistance R16 is connected with the colelctor electrode of audion VT5, the other end and the tune of bidirectional thyristor V
Joint end is connected.The P pole of diode D8 first anode with bidirectional thyristor V after resistance R17 is connected, N pole and vibration core
The VSS pin of sheet U2 is connected.The negative pole of polar capacitor C10 is connected with the second plate of bidirectional thyristor V, and positive pole is through resistance
After R18, the N pole with diode D8 is connected.
Wherein, the positive pole of polar capacitor C9 is connected with the N pole of diode D8, the colelctor electrode phase of negative pole and audion VT6
Connect.The negative pole of polar capacitor C11 is connected with the emitter stage of audion VT6, positive pole after resistance R21 with field effect transistor MOS1
Drain electrode be connected.The N pole of diode D9 colelctor electrode with audion VT6 after resistance R19 is connected, and P pole is after resistance R22
It is connected with the grid of field effect transistor MOS1.The positive pole of polar capacitor C12 is connected with the P pole of diode D9, and negative pole is through resistance
After R20, the colelctor electrode with audion VT6 is connected.
Meanwhile, the positive pole of polar capacitor C13 source electrode with field effect transistor MOS1 after resistance R23 is connected, negative pole and field
The grid of effect pipe MOS1 is connected.One end of inductance L3 is connected with the source electrode of field effect transistor MOS1, the other end and control core
The VCC pin of sheet U1 is connected.The N pole of Zener diode D10 is connected with the positive pole of polar capacitor C13, and P pole is through resistance R24
It is connected with the grid of field effect transistor MOS1 afterwards.
The base stage of described audion VT6 is connected with the positive pole of polar capacitor C10；The N pole of described diode D9 also with pole
The negative pole of property electric capacity C9 be connected after ground connection；The second plate of described bidirectional thyristor V is the most common with the P of Zener diode D10
Form the outfan of delay switch circuit and be connected with the lamp socket of the LED of outdoor LED large display screen.
As described in Figure 2, described signal level regulation circuit is by field effect transistor MOS2, audion VT7, amplifier P, resistance
R25, resistance R26, resistance R27, resistance R28, resistance R29, adjustable resistance R30, resistance R31, resistance R32, resistance R33, resistance
R34, polar capacitor C14, polar capacitor C15, polar capacitor C16, polar capacitor C17, polar capacitor C18, inductance L4, diode
D11, diode D12, and diode D13 form.
During connection, the positive pole of polar capacitor C14 source electrode with field effect transistor MOS2 after resistance R25 is connected, negative pole warp
After inductance L4, the colelctor electrode with audion VT7 is connected.The P pole of diode D11 is connected with the source electrode of field effect transistor MOS2, N
Pole grid with field effect transistor MOS2 after resistance R26 is connected.The positive pole of polar capacitor C15 after resistance R27 with field effect
The grid of pipe MOS2 is connected, negative pole be connected with the drain electrode of field effect transistor MOS2 after ground connection.One end of resistance R28 and field effect
The grid of pipe MOS2 is connected, other end ground connection.
Wherein, the positive pole of polar capacitor C16 is connected with the grid of field effect transistor MOS2, negative pole and the positive pole of amplifier P
It is connected.The P pole of diode D12 base stage with audion VT7 after adjustable resistance R30 is connected, N pole after resistance R31 with
The negative pole of amplifier P is connected.The P pole of diode D13 emitter stage with audion VT7 after resistance R29 is connected, N pole warp
After resistance R34, the outfan with amplifier P is connected.
Meanwhile, the positive pole of polar capacitor C17 is connected with the P pole of diode D13, negative pole after resistance R33 with amplifier P
Outfan be connected.The positive pole of polar capacitor C18 is connected with the outfan of amplifier P, negative pole after resistance R32 with amplification
The negative pole of device P be connected after ground connection.
The source electrode of described field effect transistor MOS2 the most sequentially after luminance sensor RL and inductance L1 with the P pole phase of diode D1
Connect；The source electrode of described field effect transistor MOS2 also adjusts circuit with multiplication of voltage and is connected；Described diode D12 and polar capacitor C16
Positive pole be connected；The outfan of described amplifier P also positive pole with polar capacitor C2 is connected.
During operation, present invention employs the integrated chip of IC555 and be used as control chip U1, and bidirectional thyristor V is led
Logical or cut-off is controlled, and is provided with photoconductive resistance as the optical sensor with delayed comparison in luminance sensor RL.When
When the light source on daytime is irradiated on luminance sensor RL, the luminance signal of collection is then transferred to control chip by luminance sensor RL
U1, the voltage by photoconductive resistance in luminance sensor RL is reduced to 1/3rd of supply voltage, i.e. 4V unidirectional current simultaneously
Pressure, now, after the luminance signal received then is analyzed processing by control chip U1, triggers its OUT pin simultaneously and exports low electricity
Flat, and the switch S in the self-maintained circuit being made up of vibration chip U2 and its exterior electrical components locates the most at lower voltages
In off-state, self-maintained circuit does not work and is only used as wire use, and the low-voltage of the OUT pin output of control chip U1 is passed through
Self-maintained circuit, and the low-voltage being carried on the delay switch circuit of the present invention can not make the audion VT6 in this circuit,
Field effect transistor MOS1 and bidirectional thyristor V conducting, i.e. audion VT6, field effect transistor MOS1 and bidirectional thyristor V are now for blocking
State, LED large display screen is not lit.
Otherwise, when evening, gauge without light source was irradiated on luminance sensor RL, the brightness letter that luminance sensor RL then will gather
Number being transferred to control chip U1, the voltage by photoconductive resistance in luminance sensor RL increases to three points of supply voltage simultaneously
More than two, i.e. about 8V DC voltage, now, control chip U1 then to receive luminance signal be analyzed process after, with
Time trigger its OUT pin output high level, and in the self-maintained circuit being made up of vibration chip U2 and its exterior electrical components
Switch S be in switched on the most under high voltages, the unusual fluctuations of electric current are suppressed by self-maintained circuit, make output electricity
Stream pulsation keeps stable, and provides stable driving voltage and electric current, the now audion in this circuit to delay switch circuit
VT6, field effect transistor MOS1 and bidirectional thyristor V obtain stable driving voltage and electric current and turn on, base LED large display screen
LED obtains electric being lit.
Meanwhile, the signal level regulation circuit of the present invention can be by field effect transistor MOS2 and inductance L4 and adjustable resistance
The dutycycle of the square-wave signal in the signal of telecommunication that luminance sensor RL is transmitted by the actuator that R30 is formed is adjusted, and makes
The overall level held stationary of the signal of telecommunication, and will adjust after the signal of telecommunication amplified device P the pulsation of the signal of telecommunication is adjusted
After be transferred to control chip U1, it is ensured that the accuracy of the signal of telecommunication that control chip U1 receives, thus improve the present invention couple
The accuracy of signal processing.
The control chip U1 of the present invention the most preferentially have employed the integrated chip of IC555 and realizes, this chip and external electrical unit
Part combines, and can effectively load the interference of external electromagnetic ripple signal, makes the control chip U1 can be exactly to luminance sensor RL
The signal transmitted is analyzed processing；Meanwhile, for the practical effect of the present invention, described vibration chip U2 the most preferentially adopts
Realize with the integrated chip of CD4060.Thus improve the present invention and the LED of outdoor LED large display screen is opened and closed
It is controlled, effectively saves electric power resource.
As it has been described above, just can well realize the present invention.
Claims (6)
1. an outdoor LED large display screen signal level adjustment type light control system, it is characterised in that: main by control chip
U1, luminance sensor RL, audion VT1, negative pole is connected with the TRHIG pin of control chip U1, positive pole after resistance R1 with
The polar capacitor C2 that the REST pin of control chip U1 is connected, the signal level being connected with the positive pole of polar capacitor C2 regulates
Circuit, N pole is connected with the emitter stage of audion VT1, P pole is electric with signal level regulation after inductance L1 and luminance sensor RL
The diode D1 that road is connected, positive pole is connected with the base stage of audion VT1, negative pole is connected with the REST pin of control chip U1
The polar capacitor C1 connect, regulates circuit and the THRE pin of control chip U1 and CONT pin and OUT with signal level respectively
Multiplication of voltage that pin is connected adjusts circuit, the self-maintained circuit being connected with the OUT pin of control chip U1, and respectively with
The VCC pin of control chip U1 adjusts the delay switch circuit composition that circuit is connected with self-maintained circuit and multiplication of voltage；Institute
State the VCC pin of the control chip U1 colelctor electrode respectively with REST pin and audion VT1 be connected, its DNG pin ground connection.
A kind of outdoor LED large display screen signal level adjustment type light control system the most according to claim 1, its feature
Be: described signal level regulation circuit by field effect transistor MOS2, audion VT7, amplifier P, positive pole after resistance R25 with field
The polar capacitor C14, P that the source electrode of effect pipe MOS2 is connected, negative pole colelctor electrode with audion VT7 after inductance L4 is connected
The diode that pole is connected with the source electrode of field effect transistor MOS2, N pole is connected with the grid of field effect transistor MOS2 after resistance R26
D11, positive pole grid with field effect transistor MOS2 after resistance R27 is connected, negative pole is connected with the drain electrode of field effect transistor MOS2
The polar capacitor C15 of rear ground connection, one end is connected with the grid of field effect transistor MOS2, the resistance R28 of other end ground connection, positive pole with
Polar capacitor C16, the P pole that the grid of field effect transistor MOS2 is connected, negative pole is connected with the positive pole of amplifier P is through adjustable resistance
The diode D12, P that after R30, the base stage with audion VT7 is connected, N pole negative pole with amplifier P after resistance R31 is connected
Pole emitter stage with audion VT7 after resistance R29 is connected, N pole outfan with amplifier P after resistance R34 is connected
Diode D13, positive pole is connected with the P pole of diode D13, negative pole outfan with amplifier P after resistance R33 is connected
Polar capacitor C17, and positive pole is connected with the outfan of amplifier P, negative pole after resistance R32 with the negative pole of amplifier P
The polar capacitor C18 composition of ground connection after being connected；The source electrode of described field effect transistor MOS2 is the most sequentially through luminance sensor RL and electricity
It is connected with the P pole of diode D1 after sense L1；The source electrode of described field effect transistor MOS2 also adjusts circuit with multiplication of voltage and is connected；Described
Diode D12 is connected with the positive pole of polar capacitor C16；The outfan of described amplifier P also with the positive pole phase of polar capacitor C2
Connect.
A kind of outdoor LED large display screen signal level adjustment type light control system the most according to claim 2, its feature
It is: described multiplication of voltage adjustment circuit is by audion VT2, and audion VT3, N pole is connected with the THRE pin of control chip U1, P
The diode D2 that pole base stage with audion VT2 after resistance R2 is connected, positive pole after resistance R3 with the P pole phase of diode D2
Connect, the emitter stage of polar capacitor C3, P pole that negative pole base stage with audion VT3 after inductance L2 is connected and audion VT2
Be connected, diode D3 that N pole is sequentially connected through adjustable resistance R4 positive pole with polar capacitor C3 after resistance R5, positive pole warp
The polar capacitor C4, N that after resistance R6, the positive pole with polar capacitor C3 is connected, negative pole is connected with the colelctor electrode of audion VT3
The diode D4 that pole is connected with the colelctor electrode of audion VT3, P pole is connected with the positive pole of polar capacitor C3, one end and polarity
The resistance R7 that the negative pole of electric capacity C3 is connected, the other end is connected with the P pole of diode D4, and positive pole after resistance R8 with control
The polar capacitor C5 composition of ground connection after the OUT pin of coremaking sheet U1 is connected, negative pole is connected with the colelctor electrode of audion VT3；
The described colelctor electrode of audion VT2 is connected with the source electrode of field effect transistor MOS2；The emitter stage of described audion VT3 and control core
The CONT pin of sheet U1 is connected, its colelctor electrode is also connected with self-maintained circuit.
A kind of outdoor LED large display screen signal level adjustment type light control system the most according to claim 3, its feature
Be: described self-maintained circuit by the chip U2 that vibrates, audion VT4, audion VT5, P pole after resistance R13 with vibration core
The Vdd pin of sheet U2 is connected, the output of N pole is connected through resistance R14 emitter stage with audion VT5 after resistance R15 two
Pole pipe D7, negative pole with vibration chip U2 CP0 pin be connected, positive pole after resistance R12 with vibration chip U2 CP1 pin phase
The polar capacitor C7 connected, is serially connected in switch S, the P pole warp between the positive pole of polar capacitor C7 and the CP2 pin of vibration chip U2
The diode D5 that after resistance R9, the Vdd pin with vibration chip U2 is connected, N pole is connected with the VSS pin of vibration chip U2,
Positive pole after resistance R10 with vibration chip U2 the polarity that Vdd pin is connected, negative pole is connected with the base stage of audion VT4
Electric capacity C6, the polar capacitor that negative pole is connected with the base stage of audion VT5, positive pole is connected with the Q14 pin of vibration chip U2
C8, and P pole is connected with the CP1 pin of vibration chip U2, N pole emitter stage with audion VT4 after resistance R11 is connected
Diode D6 composition；The Vdd pin of described vibration chip U2 is also connected with the OUT pin of control chip U1；Described vibration
The R pin of chip U2 is connected with Vdd pin, its CP2 pin also positive pole with polar capacitor C7 is connected；Described vibration chip
The VSS pin of U2 is connected with colelctor electrode and the delay switch circuit of audion VT3 the most respectively；The current collection of described audion VT4
Pole ground connection；The N pole of described diode D5 also positive pole with polar capacitor C6 is connected；The N pole of described diode D6 also with vibration
The Q14 pin of chip U2 is connected；The colelctor electrode of described audion VT5 is connected with delay switch circuit.
A kind of outdoor LED large display screen signal level adjustment type light control system the most according to claim 4, its feature
It is: described delay switch circuit is by the collection of field effect transistor MOS1, audion VT6, bidirectional thyristor V, one end and audion VT5
Resistance R16, the P pole that electrode is connected, the other end is connected with the adjustable side of bidirectional thyristor V after resistance R17 with two-way crystalline substance
The diode D8 that the first anode of brake tube V is connected, N pole is connected with the VSS pin of vibration chip U2, negative pole and two-way brilliant lock
The polar capacitor C10 that the second plate of pipe V is connected, positive pole is connected with the N pole of diode D8 after resistance R18, positive pole with
The polar capacitor C9 that the N pole of diode D8 is connected, negative pole is connected with the colelctor electrode of audion VT6, negative pole and audion VT6
Polar capacitor C11, the N pole that emitter stage is connected, positive pole is connected with the drain electrode of field effect transistor MOS1 after resistance R21 through electricity
Be connected with the colelctor electrode of audion VT6 after resistance R19, P pole is connected with the grid of field effect transistor MOS1 after resistance R22 two
Pole pipe D9, the pole that positive pole is connected with the P pole of diode D9, negative pole colelctor electrode with audion VT6 after resistance R20 is connected
Property electric capacity C12, positive pole source electrode with field effect transistor MOS1 after resistance R23 is connected, the grid of negative pole and field effect transistor MOS1
The polar capacitor C13 being connected, one end is connected with the source electrode of field effect transistor MOS1, the VCC of the other end and control chip U1 pipe
The inductance L3 that foot is connected, and N pole is connected with the positive pole of polar capacitor C13, P pole after resistance R24 with field effect transistor
The Zener diode D10 composition that the grid of MOS1 is connected；The base stage of described audion VT6 and the positive pole phase of polar capacitor C10
Connect；The N pole of described diode D9 also negative pole with polar capacitor C9 be connected after ground connection；The second of described bidirectional thyristor V
The P pole of anode and Zener diode D10 collectively constitutes the outfan of delay switch circuit.
A kind of outdoor LED large display screen signal level adjustment type light control system the most according to claim 5, its feature
It is: described control chip U1 is the integrated chip of IC555；Described vibration chip U2 is the integrated chip of CD4060.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610726595.8A CN106255267A (en) | 2016-08-25 | 2016-08-25 | A kind of outdoor LED large display screen signal level adjustment type light control system |
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| CN201610726595.8A CN106255267A (en) | 2016-08-25 | 2016-08-25 | A kind of outdoor LED large display screen signal level adjustment type light control system |
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| CN106255267A true CN106255267A (en) | 2016-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561330A (en) * | 2017-10-11 | 2018-01-09 | 绍兴职业技术学院 | A kind of 20 grades of level indicating circuits of multiple input sources |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561330A (en) * | 2017-10-11 | 2018-01-09 | 绍兴职业技术学院 | A kind of 20 grades of level indicating circuits of multiple input sources |
| CN107561330B (en) * | 2017-10-11 | 2023-12-08 | 绍兴职业技术学院 | 20-level indicating circuit of multiple input sources |
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Application publication date: 20161221 |