CN201652133U

CN201652133U - Infrared sensor solar energy lawn lamp

Info

Publication number: CN201652133U
Application number: CN2010201954160U
Authority: CN
Inventors: 艾晓峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-07
Filing date: 2010-05-07
Publication date: 2010-11-24
Anticipated expiration: 2020-05-07

Abstract

The utility model relates to a solar energy lamp taking an LED as a light source, in particular to an infrared sensor solar energy lawn lamp emitting hard light and then emitting dim light after automatically delaying for a period of time by long time emitting of dim light under light control and infrared induction. The utility model is characterized in that: a light control circuit controls an electronic switch and an over discharging protection circuit and a low current constant current control circuit; the electronic switch controls an LED light source circuit and a control circuit power supply; the constant current control circuit is divided into two ways of a low current constant current control circuit and a heavy current constant current control circuit, and controls the LED light source circuit simultaneously; an infrared induction amplification and delay circuit controls the heavy current constant current control circuit; only the light control circuit operates in the daytime, the quiescent power drain is low, only dozens of microamperes; the light control circuit controls the electronic switch and the low current constant current control circuit to cause the LED to emit dim light at night when no one is around, and the infrared induction amplification and delay circuit controls the heavy current constant current control circuit to cause the LED to emit hard light when a person comes, so as to prevent the LED from being impacted by heavy current and extend the service life.

Description

The infrared induction solar lawn lamp

Technical field

The utility model relates to the solar energy lamp of a kind of LED of use as light source, especially is subjected to send out behind light-operated long-time the low light level and the infrared induction infrared induction solar lawn lamp of sending out the low light level after high light automatic time delay a period of time.

Background technology

In prior art, Chinese patent ZL200820085489.7 provides a kind of, sends out the human body infrared induction solar lawn lamp of the low light level after high light automatic time delay a period of time by light-operated the low light level and infrared induction control back; Described as can be known by its circuit theory diagrams and specification: use Single-chip Controlling, single-chip microcomputer is disturbed easily under extraneous high-intensity magnetic field condition and is taken place to crash stable bad; Structure is complicated, and cost is higher, daytime single chip machine controlling circuit, voltage-stabilized power supply, infrared induction circuit etc. is all worked, so quiescent dissipation is bigger; LED constant-current circuit brightness useless is subjected to battery tension to influence instability and has only several LED to work when sending out the low light level, and these several LED light decays are aging all faster; Other LED is subjected to heavy current impact when sending out high light, influences its service life; So performance is not ideal enough.

Summary of the invention

The utility model is at above deficiency, a kind of working stability is provided, quiescent dissipation is little, simple in structure, cost is low, easy to use, the life-span is long, the long-time low light level of sending out had the people to send out the low light level after out-of-date high light automatic time delay a period of time when had no talent night, infrared induction solar lawn lamp that can continuous luminous high light when the someone walks about continuously.

For solving the problems of the technologies described above, solution of the present utility model is as follows:

Described infrared induction solar lawn lamp, comprise the solar cell that is arranged on the shell, be arranged on the interior battery of lamp socket, cross and put and electronic switching circuit, constant-current control circuit and led light source circuit, described solar cell links to each other with battery by overcharge protection circuit, battery links to each other with constant-current control circuit, led light source circuit by electronic switch and over-discharge protection circuit, it is characterized in that: light-operated circuit control electronic switch and over-discharge protection circuit and little electric current constant-current control circuit; Electronic switch control led light source circuit and control circuit power supply; Constant-current control circuit divides two-way, and little electric current constant-current control circuit is with big electric current constant-current control circuit and control the led light source circuit simultaneously; Infrared induction amplifies and delay circuit is controlled big electric current constant-current control circuit; Have only light-operated circuit work daytime, quiescent dissipation is little has only tens microamperes; Evening nobody the time light-operated circuit control electronic switch and little electric current constant-current control circuit make LED send out the low light level, there is man-hour to amplify and delay circuit is controlled big electric current constant-current control circuit and made LED send out high light through infrared induction, make LED avoid heavy current impact and prolong its service life, use constant-current circuit brightness more stable, because of using element still less, so structure is simpler, cost is lower.

Characteristics of the present utility model are: brightness stability, quiescent dissipation is little, simple in structure, cost is low, easy to use, the life-span is long, the long-time low light level of sending out when night, nobody walked about is sent out high light or can be sent out high light continuously when the someone walks about continuously when the someone walks about; Make LED avoid heavy current impact and prolong its service life; The illumination and the decoration in suitable especially outdoor lawn, greenery patches or gardens.

Description of drawings

Fig. 1 is the utility model block diagram

Fig. 2 is the utility model circuit theory diagrams

Solar cell among the figure: U1; overcharge protection circuit: R3; Q1; D2; battery: U2; back discharge protection: D1; light-operated circuit: R1; R2; Q2; electronic switch and over-discharge protection circuit: R4; Q4; R5; D3; Q3; little power consumption voltage-stabilized power supply: IC1; infrared induction amplifies and delay circuit: PIR (infrared sensor); R6; R7; C4; C5; R8; R9; Q5; C6; R10; Q6; R11; C7; R12; R13; C3; IC2; C8; little electric current constant-current control circuit: R17; D4; D5; Q7; R15; big electric current constant-current control circuit: R14; Q8; R16, led light source circuit: R18; R19; R20; R21; several high-brightness LEDs of LED1 to LED12.

The specific embodiment

Consult Fig. 2, the utility model be described in further detail:

Solar cell U1 voltage is higher during daytime, make the Q2 conducting through light-operated circuit R1 and R2 dividing potential drop, electronic switch and over-discharge protection circuit Q4 base stage are that low level is ended Q3 and also do not worked by other circuit, have only that light-operated circuit work quiescent dissipation is very little has only tens microamperes; Solar cell U1 charges to battery U2 by back discharge protection diode D1 simultaneously; the D2 conducting makes the Q1 conducting by current-limiting resistance R3 when battery tension reaches charging limit voltage, solar cell U1 both end voltage is reduced stop battery U2 charge protection battery is not overcharged.

When at dark, solar cell U1 voltage is lower, light-operated circuit Q2 ends, electronic switch and over-discharge protection circuit Q4 base stage are also conducting of high level conducting Q3, little electric current constant-current control circuit work is because of constant current resistance R15 resistance is bigger, so by less low light level of LED electric current, continuous current is diode drop 0.7V/R15, and C1 is a filter capacitor; At this moment amplify for infrared induction and delay circuit provides power supply through little power consumption voltage-stabilized power supply IC1 voltage stabilizing, detect human infrared signal as man-hour infrared sensor PIR and after two-stage is amplified, trigger time base circuit IC2, at this moment the IC23 pin is the big electric current constant-current control circuit of high level Q8 conducting, make R16 and on constant current resistance R15 its resistance reduce continuous current and strengthen LED and send out high light, sending out the low light level after time-delay a period of time has man-hour can send out high light continuously continuously, make LED avoid heavy current impact and prolong its service life, use the brightness of Constant Electric Current paths of LEDs more stable, C2 is decoupling capacitance, and the led light source circuit is by flows resistance R18, R19, R20, R21 and LED1 to LED12 string LED compose in parallel; Over-discharge protection circuit diode D3 also stops discharge by battery by electronic switch Q3 when battery U2 voltage is low, and the protection battery is crossed and put.

Claims

1. infrared induction solar lawn lamp, by solar cell, overcharge protection circuit, battery, electronic switch and over-discharge protection circuit, infrared induction amplifies and delay circuit, little electric current constant-current control circuit, big electric current constant-current control circuit, the led light source circuit is formed by connecting; It is characterized in that: light-operated circuit control electronic switch and over-discharge protection circuit and little electric current constant-current control circuit; Electronic switch control led light source circuit and control circuit power supply; Constant-current control circuit divides two-way, and little electric current constant-current control circuit is with big electric current constant-current control circuit and control the led light source circuit simultaneously; Infrared induction amplifies and delay circuit is controlled big electric current constant-current control circuit.

2. infrared induction solar lawn lamp according to claim 1 is characterized in that: be connected with overcharge protection circuit between solar cell and the battery, overcharge protection circuit by: R3, Q1, D2 form.

3. infrared induction solar lawn lamp according to claim 1 is characterized in that: light-operated circuit control electronic switch and over-discharge protection circuit; Light-operated circuit by: R1, R2, Q2 form, electronic switch and over-discharge protection circuit by: R4, Q4, R5, D3, Q3 are formed by connecting.

4. infrared induction solar lawn lamp according to claim 1, it is characterized in that: constant-current control circuit divides two-way, and little electric current constant-current control circuit is with big electric current constant-current control circuit and control the led light source circuit simultaneously; Little electric current constant-current control circuit by: R17, D4, D5, Q7, R15 form, big electric current constant-current control circuit by: R14, Q8, R16 form, the led light source circuit by: R18, R19, R20, several high-brightness LEDs of R21, LED1 to LED12 are formed by connecting.

5. infrared induction solar lawn lamp according to claim 1 is characterized in that: infrared induction amplifies and delay circuit is controlled big electric current constant-current control circuit; Infrared induction amplify and delay circuit by: PIR infrared sensor, R6, R7, C4, C5, R8, R9, Q5, C6, R10, Q6, R11, C7, R12, R13, C3, IC2, C8 are formed by connecting.