CN102298901A

CN102298901A - LED energy-saving display control device

Info

Publication number: CN102298901A
Application number: CN2011102820853A
Authority: CN
Inventors: 罗萍
Original assignee: Huizhou University
Current assignee: Huizhou University
Priority date: 2011-09-22
Filing date: 2011-09-22
Publication date: 2011-12-28

Abstract

The invention discloses an LED (Light-Emitting Diode) energy-saving display control device, comprising a singlechip master control circuit, and further comprising a stepping motor control circuit and an LED display circuit both connected with the singlechip master control circuit. The LED display circuit comprises an LED display driving circuit, and the LED display driving circuit correspondingly drives N LEDs configured into a strip-shaped light string; the stepping motor control circuit comprises a stepping motor driving circuit, a photoelectric detection circuit, a stepping motor and a load, the load of the stepping motor is connected with the strip-shaped light string, and the stepping motor control circuit exchanges information with the singlechip and accepts control instructions of the singlechip to drive the strip-shaped light string to move. With the LED energy-saving display control device, the LED display circuit is simplified, power consumption is reduced, cost is reduced, and maintenance can be simple; and circuit integration level is high, and devices are popular and can be easily transformed into practical electronic products.

Description

The energy-conservation display control unit of a kind of LED

Technical field

The present invention relates to LED and show the field, specifically use the energy-conservation display control unit of a kind of new LED,, realized purpose the energy-conservation demonstration of LED by the fusion of singlechip technology and modern electronic technology.

Background technology

At present, most LED demonstration is the LED display mode according to N*M (row * row) dot matrix arrangement under single-chip microcomputer (or microcomputer) control basically.The needed LED number of this display mode is N*M, must cause numerous and diverse LED display circuit, has produced problems such as power consumption is big, device volume big, inconvenient maintenance simultaneously.

Summary of the invention

Technical matters to be solved by this invention provides the energy-conservation display control unit of a kind of LED, this device from display mode, the light intensity of a kind of new LED detect, limiting time three aspects consider, finally reach the purpose of the energy-conservation demonstration of LED.

For solving the problems of the technologies described above, the technical scheme that the present invention takes is:

The energy-conservation display control unit of a kind of LED, include the single-chip microcomputer governor circuit, also comprise the stepping motor control circuit and the LED display circuit that are connected with the single-chip microcomputer governor circuit, the LED display circuit includes the LED display driver circuit, the corresponding driving N LED of LED display driver circuit, the N that an is driven LED is set to the strip light string, stepping motor control circuit comprises stepper motor driving circuit, photoelectric detective circuit, stepper motor and load, connect described strip light string in the stepper motor load, the steering order drive strip light string that stepping motor control circuit and single-chip microcomputer carry out message exchange and accept single-chip microcomputer moves.

The stepper motor driving circuit that stepping motor control circuit in the such scheme is selected for use is classical driving circuit, described photoelectric detective circuit comprises phase inverter G1, resistance R 3, R4, reflective photoelectric sensor IRT-20001/T and is installed in reset flag in the stepper motor load, the Single-chip Controlling stepper motor drives in the LED strip light string moving process, single-chip microcomputer provides the control signal that the LED on the strip light string is bright, go out for M time, under the effect of bright inertia of LED and human eye vision retention effect, the dot matrix that forms N*M LED on plane of motion shows;

When photoelectric detective circuit detects reset flag, variable signal is exported to single-chip microcomputer, by Single-chip Controlling stepper motor is resetted again

LED display circuit in the such scheme comprises also that specifically the LED that connects with single-chip microcomputer shows that register circuit, " startup " switch, LED show that register circuit comprises eight D-latch 74373 (1)-(7); Described LED display driver circuit is classical driving circuit.

Single-chip microcomputer governor circuit of the present invention comprises single chip circuit, clock circuit, LCD liquid crystal display circuit, temperature sensing circuit, light intensity testing circuit and function control switch circuit.

The present invention has following remarkable result compared to existing technology:

The energy-conservation display device of LED of the present invention adopts Single-chip Controlling to realize with LED display text, figure, and can regularly show time and temperature.It can rise to 56 according to actual needs by (OK) N(8) individual LED(wall scroll form installs) realize having N/M(capable/row) (row can be selected according to actual needs 5-100) plane lattice of individual LED arrangement shows, thereby has simplified the LED display circuit, has reached the workable purpose of circuit section; The present invention has also adopted light intensity to detect night in daytime and has controlled the LED demonstration in the acting in conjunction that limits the demonstration time, has realized the effect that this device is saved electric energy conscientiously; Specific timing shows the function of time and temperature, makes this device have more the design of intelligent and hommization.

The display mode of LED of the present invention makes that the LED display circuit is simplified, electric energy consumption is low, cost is low; The circuit level height, device is popular, easily is converted into practical electronic product.

Description of drawings

Fig. 1 is the energy-conservation display control unit system block diagram of a kind of LED;

Fig. 2 is the energy-conservation display control unit circuit theory diagrams of a kind of LED;

Fig. 3 is a LED display control circuit schematic diagram;

Fig. 4 is one of classical LED display driver circuit;

Fig. 5 is two of a classical LED display driver circuit;

Fig. 6 is three of a classical LED display driver circuit;

Fig. 7 is four of a classical LED display driver circuit;

Fig. 8 is five of a classical LED display driver circuit;

Fig. 9 is the stepping motor control circuit schematic diagram;

Figure 10 is one of classical stepper motor driving circuit;

Figure 11 is two of a classical stepper motor driving circuit.

Embodiment

For the ease of those skilled in the art's understanding, structural principle of the present invention is further described in detail below in conjunction with specific embodiment and accompanying drawing.

System of the present invention constitutes referring to Fig. 1, and the energy-conservation display control unit of a kind of LED includes the single-chip microcomputer governor circuit, also comprises the stepping motor control circuit and the LED display circuit that are connected with the single-chip microcomputer governor circuit.

Wherein the single-chip microcomputer governor circuit comprises that the single-chip microcomputer governor circuit comprises single chip circuit, clock circuit, LCD liquid crystal display circuit, temperature sensing circuit, light intensity testing circuit and function control switch circuit.

The LED display circuit includes the LED register circuit ,The LED display driver circuit, the corresponding driving N LED of LED display driver circuit, the N that an is driven LED is set to the strip light string,

Stepping motor control circuit comprises stepper motor driving circuit, photoelectric detective circuit, stepper motor and load, connects described strip light string in the stepper motor load,

The steering order that stepping motor control circuit and single-chip microcomputer carry out message exchange and accept single-chip microcomputer drives the strip light string and moves.

The present invention realizes with LED display text, figure with Single-chip Controlling, and can regularly show time and temperature.It is mainly invented: can rise to 56 according to actual needs by N(8) individual LED(wall scroll form installs) realize having (OK/be listed as) N/M(M and can select according to actual needs 5-100) plane lattice demonstration, thus the LED display circuit simplified, reached the workable purpose of circuit section; The present invention has also adopted light intensity to detect night in daytime and has limited the acting in conjunction of demonstration time and controlled the LED demonstration, has further strengthened the ability of energy saving of system work.

The composition and the principle of work of each circuit of the present invention are as follows:

Single chip circuit of the present invention is a core with single-chip microcomputer 89S51, its crystal oscillating circuit: be made up of 12MHZ quartz-crystal resonator X1, capacitor C 1 and C2; Reset circuit: by resistance R 6, capacitor C 6, " resetting " switch are formed.Wherein an end of the end of the XTAL1 of single-chip microcomputer and crystal oscillator X1, capacitor C 1 joins, and the other end of single-chip microcomputer XTAL2 and crystal oscillator X1 and the end of C2 join, and the other end and the ground wire of capacitor C 1 join, and the other end and the ground wire of capacitor C 2 join,

One end of the RST of single-chip microcomputer and resistance R 6, an end of capacitor C 6 joins, and the other end and the ground wire of capacitor C 6 join, and the other end of resistance R 6 joins with an end of " resetting " switch, and the other end and the 5V positive source of " resetting " switch join.This circuit cooperates software program and each unit of function circuit is got in touch with and message exchange, or sends steering order to each element circuit, realizes the target control of this device.

The LED display circuit comprises also that specifically the LED that connects with single-chip microcomputer shows register circuit, " startup " switch, LED display driver circuit.LED shows that register circuit comprises eight D-latch 74373 (1)-(7); Described LED display driver circuit is classical driving circuit.

Referring to Fig. 3, corresponding the joining of D0-D7 of the P2.0-P2.7 of single-chip microcomputer and 7 eight D-latchs 74373, each G corresponding joining of end of single-chip microcomputer P1.1-P1.7 and 7 eight D-latchs 74373, single-chip microcomputer P1.0 end and 7 eight D-latchs 74373 /the OE end is connected in parallel.Each Q end of 7 eight D-latchs 74373 joins with led drive circuit; 74373 VCC end joins with the 5V positive source, and 74373 GND end joins with ground wire.And with all LED in an orderly manner the wall scroll form be arranged in the load of stepper motor.

Single-chip microcomputer P1.1-P1.7 controls each eight D-latch successively and receives and latch single-chip microcomputer P2 mouth and send height, or low control level signal; Single-chip microcomputer P1.0 controls eight D-latchs latched signal is outputed to led drive circuit.

The LED display driver circuit provides the drive current and the operating voltage of suitable LED work, and it is bright that LED is carried out, or the work of going out, literal, graphic presentation that finishing device requires.

The LED display driver circuit is selected classical driving circuit for use, referring to Fig. 4～8, with LED display driver circuit shown in Figure 8 is example, the Q end of eight D-latchs 74373 joins with the end of resistance R I, 2 ends of the other end of resistance R I and photoelectrical coupler 4N35 join, 1 end and the ground wire of photoelectrical coupler 4N35 join, 3 ends of photoelectrical coupler 4N35 and the end of resistance R C join, 4 ends of photoelectrical coupler 4N35 and the anode of LED join, the other end of resistance R C and external power supply VCC1 positive pole join, and negative electrode and the ground wire of LED join.

When eight D-latchs, 74373 output signals were high level, the light emitting diode among the photoelectrical coupler 4N35 was shinny because of forward conduction, and photoelectric tube is subjected to that photoconduction is logical to make LED on the strip light string that current flowing be arranged and shinny; When 74373 output signals were low level, the light emitting diode among the photoelectrical coupler 4N35 was because of by extinguishing, and made that photoelectric tube ends, LED no current circulation and extinguishing; Wherein, RI is the current-limiting resistance of light emitting diode among the 4N35, and RC is the collector load resistor of photoelectric tube among the 4N35.1-7 eight D-latchs have 8-56 output terminal, can connect the led drive circuit work of respective numbers; Can select LED display driver circuit Fig. 4～8 according to different brightness LED needs, can be by adjusting RI ,RC and power supply VCC1 satisfy the demand of LED brightness; And with all LED in an orderly manner the wall scroll form be arranged in the load of stepper motor.

Stepping motor control circuit is referring to Fig. 9: stepper motor driving circuit, stepper motor and load and photoelectric detective circuit, " startup " switch, row's resistance R P1 form.Can select three-phase stepper motor (1.5 degree) in the practical application, work according to A, B, C three-phase wheel flow-thru electrode (pulse) mode, its rotating speed is directly proportional with pulsed frequency; When pulse signal stopped to export, stepper motor just remained on the fixing position.Can select suitable stepper motor driving circuit according to the needs of stepper motor and load thereof.

The P0.5 of single-chip microcomputer, P0.6, P0.7 end and stepper motor A, B, C driving circuit mutually join, can be according to the suitable stepper motor driving circuit and the stepper motor of needs selection of stepper motor load.Be the example explanation mutually according to step motor drive A, referring to circuit Figure 10, the P0.5 end of single-chip microcomputer joins with the end of impact damper G, the end of the other end of impact damper G and resistance R b joins, the base stage of the other end of resistance R b and triode T1 is joined, the base stage of the emitter of triode T1 and triode T2 is joined, emitter and the ground wire of triode T2 join, the collector of the collector of triode T1 and triode T2 joins, also the end with resistance R C joins, also the anode with diode DP joins, the end of the other end of resistance R C and stepper motor A winding coil LA joins, the other end and the 12V positive source of A winding coil LA join, and the negative electrode of diode DP also joins with the 12V positive source.In like manner, use the P0.6 end or the input of P0.7 termination of single-chip microcomputer, the stepper motor winding coil connects identical and A phase step motor driving circuit with LB or LC, other circuit elements device ,It is exactly the stepper motor driving circuit of B phase or C phase.Resistance common port and the 5V positive source of row's resistance R P1 join, and 8 resistance of RP1 are independently held respectively at the P0.0-P0.7 correspondence of single-chip microcomputer P0 mouth and joined; One end of

resistance R

4 and 2 ends of reflective photoelectric sensor IRT-20001/T join, 1 end of IRT-20001/T and 4 ends and ground wire join, 3 ends of IRT-20001/T and an end of resistance R 3 join, also the input end with phase inverter G1 joins, the other end of

resistance R

3 and 5V positive source join, and the single-chip microcomputer P3.2 end of the output terminal of phase inverter G1 and single-chip microcomputer joins; The stepper motor reset flag also is installed in the stepper motor load.

Stepper motor driving circuit can be selected classical driving circuit, and existing classical driving circuit is referring to Figure 10,11.Connecting the A winding with classical driving circuit shown in Figure 10 is the example explanation: be made up of impact damper G, resistance R b, Rc, RD, triode T1, T2, diode DP, stepper motor A winding coil LA; RD and DP constitute the reverse-phase protection circuit of LA, and T1, T2 constitute the Darlington triode, do electric current and amplify, and Rb is a base resistance, and R c is a collector load resistor.P0.5, the P0.6 of single-chip microcomputer P0 mouth, P0.7 end is exactly according to three road ring distributor patterns, pulse signal is outputed in the stepper motor driving circuit of A, B, each winding of C.Stepper motor driving circuit provides appropriate drive electric current and operating voltage for each winding, makes the stepper motor rotation work.According to the A winding among stepper motor driving circuit Figure 10 is the example explanation: when the P0.5 output signal was high level, triode T1, T2 obtained the forward bias conducting, and the collector current circulation is arranged in the A winding; When the P0.5 output signal was high level, triode T1, T2 obtained 0 biasing and end no collector current circulation in the A winding.Can satisfy the demand of stepper motor and load thereof by adjusting Rb, Rc and power supply VCC1.

" startup " switch is the gauge tap of system works; Row's resistance R P1 is the pull-up resistor of the parallel input/output port P0 of single-chip microcomputer.

In Fig. 8 and the display driver circuit and stepper motor driving circuit shown in Figure 11, used photoelectrical coupler.The high level signal driven for emitting lights diode of photoelectrical coupler input sends the light of certain wavelength, is received by phototriode and produces conducting work, output low level on collector.The low level signal driven for emitting lights diode of photoelectrical coupler input does not send light, makes phototriode end work, exports high level on collector.As can be seen: the conversion of electricity-light-electricity play input, the effect isolated of output, and the electric signal transmission has one-way, thereby has good electrical isolation capabilities and antijamming capability.

Wall scroll N(8-56) the strip light string and the stepper motor reset flag of individual LED composition, be placed in as density bullet in the load of stepper motor, do half turn by the Single-chip Controlling stepper motor again, the load strip light string LED of stepper motor makes the half cycle rotation or straight line moves, in wall scroll LED moving process, single-chip microcomputer provides the control signal that wall scroll LED is bright, go out for M time, and under the effect of bright inertia of LED and human eye vision retention effect, LED forms the NM(ranks on plane of motion) the dot matrix demonstration; When on stepper motor, doing a half turn, when detecting the stepper motor reset flag, gives photoelectric detective circuit variable signal of single-chip microcomputer, the control that stepper motor is resetted and works by single-chip microcomputer again.

The photoelectric detective circuit principle of work is as follows: be made up of phase inverter G1, resistance R 3, R4, reflective photoelectric sensor IRT-20001/T and the reset motor density bullet that is installed in the stepper motor load.One end of

resistance R

4 and 2 ends of reflective photoelectric sensor IRT-20001/T join, the other end of

resistance R

3 and 5V positive source join, 1 end of IRT-20001/T and 4 ends and ground wire join, 3 ends of IRT-20001/T and an end of resistance R 3 join, also the input end with phase inverter G1 joins, the other end of

resistance R

3 and 5V positive source join, and the output terminal of phase inverter G1 and the P3.2 of single-chip microcomputer end join.

When being measured density bullet, the light that the infrared diode among the IRT-20001/T emits since be launched return too a little less than, phototriode can't conducting and by work among the IRT-20001/T, collector output high level; When not having density bullet, the light that the infrared diode among the IRT-20001/T emits is owing to be launched return stronger, phototriode conducting work, collector output low level.The level signal that changes outputs to single-chip microcomputer P3.2 port after the G1 shaping.R3 is the current-limiting resistance of infrared diode, and R4 is the collector load resistor of phototriode.

Temperature collection circuit of the present invention is made up of resistance R 5, integrated temperature sensor DS18B20.DQ end and the single-chip microcomputer of integrated temperature sensor DS18B20 P3.4Join, also the end with resistance R 5 joins, and the other end of resistance R 5 and 5V positive source join.

The DS18B20 1-wire digital temperature sensor, measuring temperature range is-55 ° of C ~+125 ° C, in-10 ~+85 ° of C scopes, precision is ± 0.5 ° of C, and the circuit connection has been simplified in the digital form transmission of " one-wire bus ", improved anti-interference, R5 is the pull-up resistor of DS18B20 FPDP.DS18B20 has finished the collection and the digital processing of scene temperature, by Single-chip Controlling the DQ port of temperature data from DS18B20 is read in (P3.2 port) single-chip microcomputer.

The clock circuit of employing of the present invention is made up of integrated clock circuit DS1302, quartz-crystal resonator (32KHZ crystal oscillator) X1, capacitor C 3, C4, C5.The X1 end of integrated clock circuit DS1302 joins with the end of crystal oscillator X2, also the end with capacitor C 3 joins, and the other end and the ground wire of capacitor C 3 join, and the X2 end of DS1302 joins with the other end of crystal oscillator X2, also the end with capacitor C 4 joins, and the other end and the ground wire of capacitor C 4 join.One end of the VCC1 of DS1302 and capacitor C 5 joins, and the other end and the ground wire of capacitor C 5 join, and the VCC2 end of DS1302 joins with the 5V positive source, and the GND end of DS1302 joins with ground wire.The RST end of DS1302 joins with the P3.5 end of single-chip microcomputer, and the SCLK end of DS1302 joins with the P3.6 end of single-chip microcomputer,, the I/O end of DS1302 joins with P3. 7 ends of single-chip microcomputer.

DS1302 is the low-power consumption real time clock circuit, can to year, month, day, week, day, the time, minute, second carries out timing, and has multiple functions such as leap year compensation and back-up source is carried out the thin current charges ability of tiny stream.X1, C3, C4 constitute the crystal oscillating circuit of DS1302, and dominant frequency is 32KHZ; VCC2 is the primary power end, connects+5V voltage, and C5 is the thin current charges electric capacity of the tiny stream of DS1302, under the situation of primary power Temporarily Closed, keeps the continuous operation of clock.RST resets/chip select line, and I/O is a serial data I/O end (two-way), and SCLK is an input end of clock.P3.5, the P3.6 of single-chip microcomputer P3 mouth, P3.7 hold corresponding the joining of RST, SCLK, I/O with DS1302, by Single-chip Controlling the I/O port of real-time time from DS1302 are read in (P3.7 port) single-chip microcomputer.This clock circuit has played the basic assurance of time in limited time in Single-chip Controlling LED shows.Can preferably start LED strip light string in the practical application in limited time and show, for example 20 stepper motor work in time to evening drive the strip light string and move the realization demonstration, and 5:00 AM stops to show; Also can cooperate, starting demonstration when time and light intensity signal satisfy the back simultaneously, thereby realization is better energy-conservation with the light intensity signal that the light intensity testing circuit detects.

Described light intensity testing circuit is made up of photoresistance RG, operational amplifier LM324, phase inverter G2, resistance R 1, R2, potentiometer W2.The end of photoresistance RG and (+) input end of operational amplifier LM324 join, also the end with resistance R 1 joins, the other end and the ground wire of photoresistance RG join, the other end of

resistance R

1 and 5V positive source join, one end of resistance R 2 and (-) input end of LM324 join, and also the end with potentiometer W2 joins, and the other end and the ground wire of photoresistance RG join, the other end of

resistance R

2 and 5V positive source join, and the other end of potentiometer W2 and center tap terminal are all joined with ground wire.The input end of the output terminal of LM324 and phase inverter G2 joins, and the output terminal of phase inverter G2 and the P3.3 of single-chip microcomputer end join.

The effect of light intensity testing circuit is: effectively distinguish out night in daytime.When the LM324 open loop is met the tendency, constitute voltage comparator work; When (+) input terminal voltage was higher than (-) input terminal voltage, LM324 was output as the logical zero level; When (+) input terminal voltage was lower than (-) input terminal voltage, LM324 was output as the logical one level.The resistance of RG changes with light intensity, also have (+) input end that the voltage that thereupon changes is input to LM324 accordingly, the voltage of (-) input end of LM324 is R2 and W2 partial pressure value, is " light " stop voltage of setting, adjusts W2 and can change " light " limit value.The logic level of LM324 output outputs to single-chip microcomputer P3.3 port again after the G2 shaping.

The LCD liquid crystal display circuit that the present invention adopts is made up of LCD MODULE LCD1602, row's resistance R P1, potentiometer W1, resistance R B.The D0-D7 end of LCD MODULE LCD1602 and P2.0-P2.7 corresponding the joining of end of single-chip microcomputer, potentiometer W1 is connected the adjustment voltage end VEE of LCD1602.The P0.0 end of single-chip microcomputer joins with the RS end of LCD1602, the P0.1 end of single-chip microcomputer joins with the R/W end of LCD1602, the PP0.2 end of single-chip microcomputer joins with the E end of LCD1602, the VCC end of LCD1602 joins with the 5V positive source, the BLA end of LCD1602 joins with the end of resistance R B, the other end of resistance R B and 5V positive source join, and the GND end of LCD1602 joins with ground wire, and the BLK end of LCD1602 joins with ground wire.

LCD1602 is the low-power consumption character-type liquid crystal display module, can show 32 characters simultaneously, and W1 adjusts the demonstration contrast of LCD1602, and BLA is that backlight positive pole, BLK are LED-OVs, adjusts resistance R B brightness backlight is set.RS is that data/command selection signal, R/W are read/write, E enable signal, D0-D7 parallel data I/O end (two-way).Corresponding the joining of RS, R/W, E of P0.0, the P0.1 of single-chip microcomputer P0 mouth, P0.2 and LCD1602, row's resistance R P1 is the pull-up resistor of the parallel input/output port P0 of single-chip microcomputer.The P2.0-P2.7 of single-chip microcomputer P2 mouth and the D0-D7 of LCD1602 are presented at real-time time and temperature on the LCD1602 liquid crystal display by Single-chip Controlling.

When the LCD liquid crystal display circuit that the present invention adopts can not need LED color lamp or pattern displaying by day, real-time time and temperature are presented on the LCD1602 liquid crystal display.

Function control switch circuit: form by " startup " switch, row's resistance R P1." startup " switch and single-chip microcomputer P0.3 port join, and row's resistance R P1 is the pull-up resistor of the parallel I/O P0 port of single-chip microcomputer.Press " startup " switch, the order of " startup " this machine work is sent to single-chip microcomputer, by the single-chip microcomputer commander, coordinate each element circuit and carry out work.

The present invention had both made the electric energy of LED display circuit itself save, and the electric energy of system works is saved; System is under the effect of limiting time scope and the detection of dim light of night light intensity, and Single-chip Controlling LED shows work, further saves electric energy, is the purpose of final realization of the present invention.System can show time and temperature value in the LCD LCDs, can also show periodically to show time and temperature value on " screen " that the design of hommization is made something perfect even more perfect the present invention like this at LED.

Claims

1. the energy-conservation display control unit of LED includes the single-chip microcomputer governor circuit, it is characterized in that: also comprise the stepping motor control circuit and the LED display circuit that are connected with the single-chip microcomputer governor circuit,

The LED display circuit includes the LED display driver circuit, the corresponding driving N LED of LED display driver circuit, and the N that an is driven LED is set to the strip light string,

Stepping motor control circuit comprises stepper motor driving circuit, photoelectric detective circuit, stepper motor and load, the described strip light string of settling in the stepper motor load,

2. the energy-conservation display control unit of a kind of LED according to claim 1 is characterized in that:

The stepper motor driving circuit that stepping motor control circuit is selected for use is classical driving circuit, described photoelectric detective circuit comprises phase inverter G1, resistance R 3, R4, reflective photoelectric sensor IRT-20001/T and the reset flag that is installed in the stepper motor load, one end of resistance R 4 and 2 ends of reflective photoelectric sensor IRT-20001/T join, 1 end of IRT-20001/T and 4 ends and ground wire join, 3 ends of IRT-20001/T and an end of resistance R 3 join, also the input end with phase inverter G1 joins, the other end of resistance R 3 and 5V positive source join, the output terminal of phase inverter G1 and the P3.2 of single-chip microcomputer join

The Single-chip Controlling stepper motor drives in the LED strip light string moving process, single-chip microcomputer provides the control signal that the LED on the strip light string is bright, go out for M time, under the effect of bright inertia of LED and human eye vision retention effect, the dot matrix that forms N*M LED on plane of motion shows;

When photoelectric detective circuit detects reset flag, variable signal is exported to single-chip microcomputer, by Single-chip Controlling stepper motor is resetted again and work on

3. the energy-conservation display control unit of a kind of LED according to claim 1 is characterized in that: the LED display circuit specifically also comprise the LED that connects with single-chip microcomputer show register circuit, " startup " switch,

LED shows that register circuit comprises seven eight D-latchs 74373 (1)-(7); Described LED display driver circuit is classical driving circuit.

4. according to claim 2 or the energy-conservation display control unit of 3 described a kind of LED, it is characterized in that:

The single-chip microcomputer governor circuit comprises single chip circuit, clock circuit, LCD liquid crystal display circuit, temperature sensing circuit, light intensity testing circuit and function control switch circuit,

Described single chip circuit comprise single-chip microcomputer 89S51, be connected with single-chip microcomputer by resistance R 6, the reset circuit that capacitor C 6, " resetting " switch are formed; And the crystal oscillating circuit of forming by quartz-crystal resonator X1, capacitor C 1 and C2,

Wherein an end of the end of the XTAL1 of single-chip microcomputer and crystal oscillator X1, capacitor C 1 joins, and the other end of single-chip microcomputer XTAL2 and crystal oscillator X1 and the end of C2 join, and the other end and the ground wire of capacitor C 1 join, and the other end and the ground wire of capacitor C 2 join,

One end of the RST of single-chip microcomputer and resistance R 6, one end of capacitor C 6 joins, and an end of " resetting " switch joins, and the other end and the ground wire of resistance R 6 join, the other end of capacitor C 6 and 5V positive source join, and the other end and the 5V positive source of " resetting " switch join.

5. the energy-conservation display control unit of a kind of LED according to claim 4 is characterized in that: described clock circuit comprises integrated clock circuit DS1302, quartz-crystal resonator X2, capacitor C 3 C4 that connect with single-chip microcomputer And C5, the X1 end of integrated clock circuit DS1302 joins with the end of crystal oscillator X2, and also the end with capacitor C 3 joins, the other end and the ground wire of capacitor C 3 join, the X2 end of DS1302 joins with the other end of crystal oscillator X2, and also the end with capacitor C 4 joins, and the other end and the ground wire of capacitor C 4 join; The VCC1 end of DS1302 joins with an end of capacitor C 5, and the other end and the ground wire of C5 join, and the VCC2 end of DS1302 joins with the 5V positive source.

6. the energy-conservation display control unit of a kind of LED according to claim 4, it is characterized in that: described LCD liquid crystal display circuit comprises single-chip microcomputer joining with it, LCD MODULE LCD1602, potentiometer W1, resistance R B, row's resistance R P1, the D0-D7 end of LCD MODULE LCD1602 and P2.0-P2.7 corresponding the joining of end of single-chip microcomputer, the center-side of potentiometer W1 is connected the adjustment voltage end VEE of LCD1602, an end and the 5V positive source of potentiometer W1 join, the other end and the ground wire of potentiometer W1 join, the BLA end of LCD1602 joins with the end of resistance R B, the other end of resistance R B and 5V positive source join, the vdd terminal of LCD1602 and 5V positive source join, the BLK of LCD1602, the VSS end all joins with ground wire, the E end of LCD1602 joins with the P0.2 end of single-chip microcomputer, the R/W end of LCD1602 joins with the P0.1 end of single-chip microcomputer, the RS of LCD1602 and the P0.0 of single-chip microcomputer end join, common port and the 5V positive source of row's resistance R P1 join, and independently hold respectively for eight of row's resistance R P1 and hold corresponding joining with the P0.0-P0.7 of single-chip microcomputer.

7. the energy-conservation display control unit of a kind of LED according to claim 4, it is characterized in that: temperature collection circuit comprises one chip microcomputer joining with it, integrated temperature sensor DS18B20, resistance R 5, the DQ end of integrated temperature sensor DS18B20 joins with single-chip microcomputer P3.2, also the end with resistance R 5 joins, and the other end of resistance R 5 and 5V positive source join.

8. the energy-conservation display control unit of a kind of LED according to claim 4, it is characterized in that: the light intensity testing circuit comprises and closes the phase inverter G2 of single-chip microcomputer connection mutually, photoresistance GR, operational amplifier LM324, resistance R 1 and R2, potentiometer W2, the end of photoresistance RG and (+) input end of operational amplifier LM324 join, also the end with resistance R 1 joins, the other end and the ground wire of RG join, the other end of resistance R 1 and 5V positive source join, (-) input end of LM324 and an end of resistance R 2 join, also the end with potentiometer W2 joins, the other end of potentiometer W2 and center-side are all joined with ground wire, and the input end of the output terminal of LM324 and phase inverter G2 joins, and the output terminal of phase inverter G2 and the P3.3 of single-chip microcomputer end join.

9. the energy-conservation display control unit of a kind of LED according to claim 4, it is characterized in that: described function switch circuit is used to start single-chip microcomputer work, comprise " startup " switch, row's resistance R P1, one end of " startup " switch and single-chip microcomputer P0.3 end join, the other end and the ground wire of " startup " switch join, and row's resistance R P1 is the pull-up resistor of the parallel I/O P0 port of single-chip microcomputer.