CN208754578U - A kind of LED desk lamp with timing function - Google Patents
A kind of LED desk lamp with timing function Download PDFInfo
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- CN208754578U CN208754578U CN201820770730.3U CN201820770730U CN208754578U CN 208754578 U CN208754578 U CN 208754578U CN 201820770730 U CN201820770730 U CN 201820770730U CN 208754578 U CN208754578 U CN 208754578U
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Abstract
The utility model discloses a kind of LED desk lamps with timing function, including voltage-stabilizing output circuit, control circuit, LED lamp bead circuit and constant-current drive circuit, the voltage-stabilizing output circuit provides stable DC source, the opening and closing of control circuit control LED lamp bead series circuit, and output phase answers pwm pulse signal to constant-current drive circuit, the pwm pulse signal that constant-current drive circuit receives control circuit amplifies and drives LED operation.The structure design of the utility model is reasonable, and cost is relatively low, consumes energy low, and long service life, brightness is adjustable, and colour temperature is optional, has timing function, can remind user's time, easy to use, is suitble to promote the use of.
Description
Technical field
The utility model relates to a kind of LED desk lamp, in particular to a kind of LED desk lamp with timing function.
Background technique
Existing LED illumination circuit includes input filter, rectification, power conversion, energy storage filtering, feedback, pulsewidth modulation etc.,
Circuit structure is complicated, at high cost, energy consumption is big.The fluctuation of another aspect LED drive current is excessive, is all easy to cause the junction temperature of LED light
The service life reduction so that LED is increased, and existing desk lamp does not have timing function, such as forgets to close, causes the waste of the energy, and
It cannot remind user's to use the time, cannot meet the requirements.
Utility model content
The purpose of this utility model, which is that, provides a kind of structurally reasonable, easy to use, energy saving band timing function
LED desk lamp.
To achieve the goals above, the technical solution adopted in the utility model is such that the band timing of the utility model
The LED desk lamp of function, including voltage-stabilizing output circuit, control circuit, LED lamp bead circuit and constant-current drive circuit, the pressure stabilizing are defeated
The DC power supply of circuit with stable out, control circuit controls the opening and closing of LED lamp bead series circuit, and output phase is answered
To constant-current drive circuit, the pwm pulse signal that constant-current drive circuit receives control circuit is amplified and is driven pwm pulse signal
LED operation.
Preferably, the output voltage of the voltage-stabilizing output circuit is 5V.
Preferably, the voltage-stabilizing output circuit includes two resistance R1, R2, three capacitors C1, C2, C3 and a pressure stabilizing
Device U2, two resistance R1, R2 are connected on the input terminal of voltage-stablizer U2, and the input terminal and ground terminal of the both ends capacitor C1 and voltage-stablizer U2 connect
It connects, is connect after capacitor C2, C3 are in parallel with the output and ground of voltage-stablizer U2.
Preferably, the control circuit includes microprocessor U1, triode a Q3, six resistance R3, R4, R5, R6,
R17, R18, five capacitors C4, C5, C6, C7, C9, two control switches SW1, SW2, a crystal oscillator X1 and two instructions
Lamp LED2, LED3, the one end resistance R3, R6 are connect with positive pole, resistance R3, R6 other end respectively with two indicator light LED2,
It is connect after LED3 connection with the 1st of microprocessor U1,2 feet, the 4th foot of microprocessor U1 is connect with resistance R4 and capacitor C4, electricity
Resistance R4 is connect with positive pole, capacitor C4 ground connection, the 5th foot ground connection of microprocessor U1, the 6th foot and resistance of microprocessor U1
R5, control switch SW1 are connected with capacitor C5, and resistance R5 is connect with positive pole, control switch SW1 and capacitor C5 ground connection, micro- place
Reason device U1 the 8th foot connect with control switch SW2 and capacitor C9 after be grounded, microprocessor U1 the 15th, 16 feet respectively with capacitor
It is grounded after C7, C6 connection, and connects crystal oscillator X1 between the 15th, 16 feet, the 18th foot of microprocessor U1 passes through resistance R18
It is connect with the base stage of triode Q3, the collector of triode Q3 is connect with constant-current drive circuit, and the emitter of triode Q3 passes through
Resistance R17 is connect with its base stage, and is connect with the output end of voltage-stablizer U2.
Preferably, the LED lamp bead circuit includes several lamp beads, it is defeated with voltage-stabilizing output circuit after several lamp bead series connection
Outlet connection.
Preferably, the constant-current drive circuit includes two triode Q1, Q2, ten resistance R7, R8, R9, R10,
R11, R12, R13, R14, R15, R16, the collector after resistance R7, R8 series connection with the base stage of triode Q1 and triode Q2 connect
It connects, the collector and LED lamp bead circuit connection of triode Q1, the base stage of triode Q2 are connect with the emitter of triode Q1, electricity
It is connected between the base stage and emitter of triode Q2 after resistance R9, R10, R11, R12, R13, R14, R15, R16 is parallel with one another.
Compared with the prior art, the advantages of the utility model are: the structure design of the utility model is reasonable, cost is relatively low,
It consuming energy low, long service life, brightness is adjustable, and colour temperature is optional, has timing function, can remind user's time, and it is easy to use, it fits
It closes and promotes the use of.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
Below in conjunction with attached drawing, the utility model is described in further detail.
Referring to Fig. 1, the LED desk lamp with timing function of the utility model, including voltage-stabilizing output circuit A, control circuit B,
LED lamp bead circuit C and constant-current drive circuit D, the voltage-stabilizing output circuit A provide stable DC source, control circuit B control
The opening and closing of LED lamp bead series circuit, and output phase answers pwm pulse signal to constant-current drive circuit D, constant-current drive circuit
The pwm pulse signal that D receives control circuit B amplifies and drives LED operation.
The output voltage of the voltage-stabilizing output circuit A is 5V.
The voltage-stabilizing output circuit A includes two resistance R1, R2, three capacitors C1, C2, C3 and a voltage-stablizer U2, and two
Resistance R1, R2 are connected on the input terminal of voltage-stablizer U2, and the both ends capacitor C1 are connect with the input terminal of voltage-stablizer U2 and ground terminal, capacitor
It is connect after C2, C3 are in parallel with the output and ground of voltage-stablizer U2.
The control circuit B includes microprocessor U1, triode a Q3, six resistance R3, R4, R5, R6, R17, R18,
Five capacitors C4, C5, C6, C7, C9, two control switches SW1, SW2, a crystal oscillator X1 and two indicator light LED2,
The one end LED3, resistance R3, R6 is connect with positive pole, and resistance R3, R6 other end are connect with two indicator lights LED2, LED3 respectively
It is connect afterwards with the 1st of microprocessor U1,2 feet, the 4th foot of microprocessor U1 is connect with resistance R4 and capacitor C4, resistance R4 and electricity
The connection of source anode, capacitor C4 ground connection, the 5th foot ground connection of microprocessor U1, the 6th foot and resistance R5, the control of microprocessor U1 are opened
SW1 is closed connect with capacitor C5, resistance R5 is connect with positive pole, and control switch SW1 and capacitor C5 are grounded, and the of microprocessor U1
8 feet are grounded after connecting with control switch SW2 and capacitor C9, microprocessor U1 the 15th, after 16 feet connect with capacitor C7, C6 respectively
Ground connection, and crystal oscillator X1 is connected between the 15th, 16 feet, the 18th foot of microprocessor U1 passes through resistance R18 and triode Q3
Base stage connection, the collector of triode Q3 connect with constant-current drive circuit D, the emitter of triode Q3 pass through resistance R17 and
The connection of its base stage, and connect with the output end of voltage-stablizer U2.
The LED lamp bead circuit C is made of main LED1, is connect with the output end of voltage-stabilizing output circuit A.
The constant-current drive circuit D includes two triode Q1, Q2, ten resistance R7, R8, R9, R10, R11, R12,
R13, R14, R15, R16 are connect after resistance R7, R8 series connection with the collector of the base stage of triode Q1 and triode Q2, triode
The collector of Q1 is connect with LED lamp bead circuit C, and the base stage of triode Q2 is connect with the emitter of triode Q1, resistance R9, R10,
It is connected to after R11, R12, R13, R14, R15, R16 are parallel with one another between the base stage and emitter of triode Q2.
Voltage-stabilizing output circuit A inputs 12V voltage through voltage-stablizer U1 pressure stabilizing, exports stable 5V voltage and supplies to microprocessor U1
Electricity.LED lamp bead circuit C is made of main LED1, and control circuit B is microprocessor U1 control, is switched, and work light circuit is pressed
Control switch SW1 is primary, and microprocessor U1 starts to work, and the 18th foot of microprocessor U1 exports corresponding pwm signal, through triode
Q3 amplification, is supplied to triode Q1, Q2 constant-current drive circuit, drives main LED1 work in low-light level gear, indicator light LED2 is bright；
It is primary by control switch SW1 again, drive main LED1 work in high brightness gear, indicator light LED2 is bright；Control switch SW1 mono- is pressed again
Secondary, main LED1 closes gear, and indicator light LED2 goes out, 8M crystal oscillator X1 connection microprocessor U1 the 15th and the 16th in circuit
Foot provides correct time for timing and calculates, and during king light work, primary by control switch SW2, indicator light LED3 is bright, into
Enter 1 hour timing function, king light will close on time after 1 hour.Constant-current drive circuit D, triode Q2 and Q1 form constant-current circuit,
Constant current drives main LED operation.
Claims (4)
1. a kind of LED desk lamp with timing function, it is characterised in that: including voltage-stabilizing output circuit, control circuit, LED lamp bead electricity
Road and constant-current drive circuit, the voltage-stabilizing output circuit provide stable DC source, and control circuit controls LED lamp bead series electrical
The opening and closing on road, and output phase answers pwm pulse signal to constant-current drive circuit, constant-current drive circuit receives control circuit
Pwm pulse signal amplifies and drives LED operation；The voltage-stabilizing output circuit includes two resistance R1, R2, three capacitors
C1, C2, C3 and voltage-stablizer a U2, two resistance R1, R2 are connected on the input terminal of voltage-stablizer U2, the both ends capacitor C1 and voltage-stablizer U2
Input terminal connected with ground terminal, connect after capacitor C2, C3 is in parallel with the output and ground of voltage-stablizer U2；The control electricity
Road includes microprocessor U1, a triode Q3, six resistance R3, R4, R5, R6, R17, R18, five capacitor C4, C5, C6,
C7, C9, two control switches SW1, SW2, a crystal oscillator X1 and two indicator lights LED2, LED3, the one end resistance R3, R6
Connect with positive pole, resistance R3, R6 other end connect respectively with two indicator lights LED2, LED3 after with microprocessor U1
1,2 feet connect, and the 4th foot of microprocessor U1 is connect with resistance R4 and capacitor C4, and resistance R4 is connect with positive pole, and capacitor C4 connects
Ground, the 5th foot ground connection of microprocessor U1, the 6th foot of microprocessor U1 are connect with resistance R5, control switch SW1 and capacitor C5, electricity
Resistance R5 is connect with positive pole, control switch SW1 and capacitor C5 ground connection, the 8th foot and control switch SW2 and electricity of microprocessor U1
Be grounded after holding C9 connection, microprocessor U1 the 15th, 16 feet be grounded after being connect respectively with capacitor C7, C6, and between the 15th, 16 feet
Crystal oscillator X1 is connected, the 18th foot of microprocessor U1 is connect by resistance R18 with the base stage of triode Q3, triode Q3's
Collector is connect with constant-current drive circuit, and the emitter of triode Q3 is connect by resistance R17 with its base stage, and with voltage-stablizer U2
Output end connection.
2. the LED desk lamp according to claim 1 with timing function, it is characterised in that: the voltage-stabilizing output circuit it is defeated
Voltage is 5V out.
3. the LED desk lamp according to claim 1 with timing function, it is characterised in that: the LED lamp bead circuit includes number
A lamp bead is connect after several lamp bead series connection with the output end of voltage-stabilizing output circuit.
4. the LED desk lamp according to claim 3 with timing function, it is characterised in that: the constant-current drive circuit includes
Two triode Q1, Q2, ten resistance R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, after resistance R7, R8 series connection
It is connect with the collector of the base stage of triode Q1 and triode Q2, the collector and LED lamp bead circuit connection of triode Q1, three poles
The base stage of pipe Q2 is connect with the emitter of triode Q1, after resistance R9, R10, R11, R12, R13, R14, R15, R16 are parallel with one another
It is connected between the base stage and emitter of triode Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820770730.3U CN208754578U (en) | 2018-05-23 | 2018-05-23 | A kind of LED desk lamp with timing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820770730.3U CN208754578U (en) | 2018-05-23 | 2018-05-23 | A kind of LED desk lamp with timing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208754578U true CN208754578U (en) | 2019-04-16 |
Family
ID=66053069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820770730.3U Active CN208754578U (en) | 2018-05-23 | 2018-05-23 | A kind of LED desk lamp with timing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208754578U (en) |
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2018
- 2018-05-23 CN CN201820770730.3U patent/CN208754578U/en active Active
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