CN203632927U

CN203632927U - LED lamp drive circuit having function of modulating light by touch

Info

Publication number: CN203632927U
Application number: CN201320786774.2U
Authority: CN
Inventors: 张德华
Original assignee: Xin He (shaoxing) Green Lighting Co Ltd
Current assignee: Harmony Mingxin Yiwu Photoelectric Technology Co ltd
Priority date: 2013-12-04
Filing date: 2013-12-04
Publication date: 2014-06-04
Anticipated expiration: 2023-12-04

Abstract

The utility model discloses an LED lamp drive circuit having a function of modulating light by touch. The LED lamp drive circuit comprises an EMI rectification module, a drive module, and a control module. Alternating-current input power is rectified by the rectification module into pulse direct-current power and supplied to the drive module. Output current of the drive module is transmitted to a light source module via the control module. The control module is mainly used for controlling the magnitude of working current transmitted to the light source module. The LED lamp drive circuit employs a charge transfer technology, detects through the charge level of a finger of an operator on a panel, and determines whether the finger approaches or touches an induction surface by virtue of monitoring the tiny change of capacitance. In this way, the modulation of the brightness of an LED lamp is conducted. The LED lamp drive circuit has an environment, temperature, and humidity adapting function, and thus the light modulation sensitivity and stability are not affected by weather or environment changes.

Description

A kind of LED lamp drive circuit with touch dimming function

Technical field

The utility model relates to a kind of LED lamp drive circuit, particularly relates to a kind of LED lamp drive circuit that touches dimming function that has.

Background technology

Along with the development continuously and healthily of LED application market, what the expansion of range of application had caused the LED illuminating product to require improves constantly, just increasingly necessary about this function of LED brightness regulation.

In view of this, I study this, have developed specially a kind of LED lamp drive circuit that touches dimming function that has.

Utility model content

The purpose of this utility model is to provide a kind of LED lamp drive circuit that touches dimming function that has, and determines that by the minor alteration of monitoring electric capacity finger approaches or touches sensitive surface, carries out the light modulation to LED brightness.

To achieve these goals, solution of the present utility model is:

A kind of LED lamp drive circuit with touch dimming function, comprise EMI rectification module, driver module and control module, alternating current input power supplying is after rectification module is rectified into pulse direct current, for driver module power supply, the output current of driver module is transferred to light source module by control module, and described control module is mainly used in controlling the operating current size that is transferred to light source module.

Described EMI rectification module mainly comprises protective tube, piezo-resistance, safety electric capacity, rectifier bridge, I-shaped inductance, resistance and thin-film capacitor, AC power is first passed through protective tube and piezo-resistance, safety electric capacity, again by rectifier bridge rectification, then after the EMI circuit of I-shaped inductance, resistance and thin-film capacitor composition, be driver module power supply.

Described driver module mainly comprises resistance, diode, electric capacity, transformer and the first integrated chip, by the pulse direct current forming after the rectification of EMI rectification module by resistance through capacitor charging, until the minimum starting resistor of the first integrated chip, the first integrated chip is started working, transformer and with its elementary resistance being connected, electric capacity and diode composition clamping protective circuit, by transformer N1 level winding and diode, resistance and electric capacity form the first integrated chip operating voltage circuit, by operating voltage and electric current being provided to after transformer transformation control module and light source module.

Control module comprises the second integrated chip and coupled resistance, electric capacity, triode, metal-oxide-semiconductor, touch point indicator light, when finger touch produces an induction electrode behind touch point, control triode and metal-oxide-semiconductor On current size according to the time length touching, thereby realized the effect to LED light modulation.

The above-mentioned LED lamp drive circuit with touch dimming function, adopt charge transfer technology, the charge level of the finger that utilizes operator on panel detects, and determines that by the minor alteration of monitoring electric capacity finger is approaching or touch sensitive surface, carries out the light modulation to LED brightness.Product possesses the adaptation function of environment, temperature, humidity, can not affect because of the variation of weather or environment sensitivity and the stability of light modulation.There is following function:

1, energising time is OFF state, and of short duration touches or respond to a bottom electrode, is converted to ON state by OFF state, and the brightness of LED lamp rises to 100% entirely bright gradually by 0%;

2, finger is long enters circulation dimming state by touch point (more than 2S);

If 3 in OFF state, length starts from minimum brightness the light modulation that circulates on time;

If 4 in ON state, length starts from current brightness the light modulation that circulates on time;

If finger is not decontroled when 5 circulation light modulation, the light modulation light modulation that circulates from low to high, finger is unclamped in light modulation during to required brightness;

6, with memory function, each short brightness being once adjusted to before all can keeping during by ON/OFF.

Accompanying drawing explanation

Fig. 1 is the LED lamp drive circuit block diagram of the present embodiment;

Fig. 2 is the LED lamp drive circuit schematic diagram of the present embodiment.

Embodiment

As shown in Figure 1, a kind of LED lamp drive circuit with touch dimming function, comprise EMI rectification module 1, driver module 2 and control module 3, alternating current input power supplying is rectified into after pulse direct current through EMI rectification module 1, for driver module 2 is powered, the output current of driver module 2 is transferred to light source module 4 by control module 3, and described control module 3 is mainly used in controlling the operating current size that is transferred to light source module 4.

In the present embodiment, described EMI rectification module 2 mainly comprises protective tube F1, piezo-resistance RV, safety capacitor C X1, rectifier bridge DB1, I-shaped inductance L 1 and L2, resistance R D1, resistance R D2, thin-film capacitor C1, AC power is first by after protective tube F1 and piezo-resistance RV, safety capacitor C X1, again by rectifier bridge DB1 rectification, after the EMI circuit forming finally by I-shaped inductance L 1 and L2, resistance R D1, RD2, capacitor C 1, for driver module 2 is powered.

Driver module 3 comprises resistance R 1, R2, R3, R4, R5, R6, RS1, RS2 diode D1, D2, D3, capacitor C 2, C3, C4, C5, transformer T1 and the first integrated chip IC1.Resistance R 1, R2 and capacitor C 4 form the energising start-up circuit of the first integrated chip IC1, operation principle is: charged until after the minimum starting resistor of the first integrated chip IC1, the first integrated chip IC1 starts working through C4 by resistance R 1, R2 by the pulse direct current forming after 2 rectifications of EMI rectification module.The elementary NS composition of resistance R 3, R4, capacitor C 3, diode D1 and transformer T1 clamping protective circuit; formed the operating voltage circuit of the first integrated chip IC1 by transformer N1 level winding and diode D2, resistance R 1, capacitor C 4; resistance R 5 and the first integrated chip IC1 composition voltage feedback circuit, resistance R S1, RS2 and the first integrated chip IC1 composition output maximum current testing circuit.By transformer T1 transformation, then operating voltage and electric current are provided after diode D3 and capacitor C 5, to control module 3 and light source module 4.

Control module 3 comprises resistance R 7, R8, R9 capacitor C 6, triode Q1, metal-oxide-semiconductor Q2, touch point indicator light DL and the second integrated chip IC2, when finger touch produces an induction electrode behind touch point (the touch control point being connected with R9), control metal-oxide-semiconductor Q2 On current size according to the time length touching, thereby realized the effect to LED light modulation.

Above-mentioned have a LED lamp drive circuit of dimming function of touch, adopts charge transfer technology, and the charge level of the finger that utilizes operator on panel detects, and determined that finger is approaching or touched sensitive surface by the minor alteration of monitoring electric capacity.Carry out the light modulation to LED brightness.Product possesses the adaptation function of environment, temperature, humidity, can not affect because of the variation of weather or environment sensitivity and the stability of light modulation.

Above-described embodiment and graphic and non-limiting product form of the present utility model and style, suitable variation or modification that any person of an ordinary skill in the technical field does it, all should be considered as not departing from patent category of the present utility model.

Claims

1. one kind has the LED lamp drive circuit that touches dimming function, it is characterized in that: comprise EMI rectification module, driver module and control module, alternating current input power supplying is after rectification module is rectified into pulse direct current, for driver module power supply, the output current of driver module is transferred to light source module by control module.

2. a kind of LED lamp drive circuit that touches dimming function that has as claimed in claim 1, it is characterized in that: described EMI rectification module mainly comprises protective tube, piezo-resistance, safety electric capacity, rectifier bridge, I-shaped inductance, resistance and thin-film capacitor, AC power is first passed through protective tube and piezo-resistance, safety electric capacity, again by rectifier bridge rectification, then after the EMI circuit of I-shaped inductance, resistance and thin-film capacitor composition, be driver module power supply.

3. a kind of LED lamp drive circuit that touches dimming function that has as claimed in claim 1, it is characterized in that: described driver module mainly comprises resistance, diode, electric capacity, transformer and the first integrated chip, by the pulse direct current forming after the rectification of EMI rectification module by resistance through capacitor charging, until the minimum starting resistor of the first integrated chip, the first integrated chip is started working, transformer and with its elementary resistance being connected, electric capacity and diode composition clamping protective circuit, by transformer N1 level winding and diode, resistance and electric capacity form the first integrated chip operating voltage circuit, by operating voltage and electric current being provided to after transformer transformation control module and light source module.

4. a kind of LED lamp drive circuit that touches dimming function that has as claimed in claim 1, it is characterized in that: control module comprises the second integrated chip and coupled resistance, electric capacity, triode, metal-oxide-semiconductor, touch point indicator light, finger touch produces an induction electrode behind touch point, according to the time length control triode and the metal-oxide-semiconductor On current size that touch.