CN205830113U

CN205830113U - The adjustable touch LED control circuit of brightness

Info

Publication number: CN205830113U
Application number: CN201620787609.2U
Authority: CN
Inventors: 朱皓青
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-07-25
Filing date: 2016-07-25
Publication date: 2016-12-21
Anticipated expiration: 2026-07-25

Abstract

The utility model discloses a kind of adjustable touch LED control circuit of brightness, this control circuit includes: LED, metal-oxide-semiconductor, electric capacity, power supply section and the first touch point, the second touch point, the 3rd touch point, the positive pole of LED connects with the positive pole of power supply section, the negative pole of LED connects with the drain electrode of metal-oxide-semiconductor, the source electrode of metal-oxide-semiconductor connects with the negative pole of power supply section, the source electrode of metal-oxide-semiconductor, the grid of metal-oxide-semiconductor connect with aforementioned first touch point, the second touch point respectively, and aforementioned electric capacity is between the source electrode of metal-oxide-semiconductor, the grid of metal-oxide-semiconductor；3rd touch point connects with the positive pole of power supply section.This utility model simple in construction, its cost is the lowest, takes up room little, easy to carry.

Description

The adjustable touch LED control circuit of brightness

Technical field

This utility model belongs to LED control field, is specifically related to the adjustable touch LED control circuit of brightness.

Background technology

LED has good energy-saving effect due to it, is now increasingly widely applied, the LED of existing market Drive circuit usually adapts to common voltage (220V) requirement, and its versatility is higher, but its structure is complicated, and simple for function LED for, designing accordingly does not the most occur in market.

Summary of the invention

The purpose of this utility model is to provide a kind of adjustable touch LED control circuit of brightness, and this utility model is tied Structure is simple, and its cost is the lowest, takes up room little, easy to carry.

Its technical scheme is as follows:

The adjustable touch LED control circuit of brightness, this control circuit includes: LED, metal-oxide-semiconductor, electric capacity, power supply section and First touch point, the second touch point, the 3rd touch point, the positive pole of LED connects with the positive pole of power supply section, the negative pole of LED and metal-oxide-semiconductor Drain electrode connect, the source electrode of metal-oxide-semiconductor connects with the negative pole of power supply section, the source electrode of metal-oxide-semiconductor, metal-oxide-semiconductor grid respectively with aforementioned One touch point, the second touch point connect, and aforementioned electric capacity is between the source electrode of metal-oxide-semiconductor, the grid of metal-oxide-semiconductor；3rd touch point with The positive pole of power supply section connects.

Further, the capacity of described electric capacity is that 5 microfarads are to 20 microfarads.

Further, described power supply section is the aneroid battery that at least two joints are connected in series.

Further, described second touch point includes first point of contact and second point of contact, and wherein, first point of contact is close Described first touch point, second point of contact is near described 3rd touch point.

It should be understood that

Aforementioned " first, second ... " does not represent concrete quantity or order, is only used for the differentiation to title.

Below advantage of the present utility model or principle are illustrated:

1, principle of the present utility model is:

In an initial condition, the voltage between two electrodes of electric capacity is zero, and the hands of user touches the second touch simultaneously Point, the 3rd touch point, now, turned on the both positive and negative polarity of power supply section by the effect of human body resistance, and be charged electric capacity, electricity The voltage held gradually rises, due to electric capacity two ends respectively with drain electrode, the sources connected in parallel of metal-oxide-semiconductor of metal-oxide-semiconductor, so, the leakage of metal-oxide-semiconductor Pole, metal-oxide-semiconductor source electrode between voltage equal to the voltage at electric capacity two ends, when the voltage of electric capacity rises to the threshold voltage of metal-oxide-semiconductor Time, metal-oxide-semiconductor turns on, and power supply section, LED, metal-oxide-semiconductor constitute power circuit, and LED is luminous；

If now finger is not removed, the voltage at electric capacity two ends can continue slowly to rise, between drain electrode and the source electrode of metal-oxide-semiconductor Equivalent resistance constantly decline, persistently risen by the electric current of LED, the brightness of LED is gradually increased；Electricity when electric capacity two ends (still there is due to metal-oxide-semiconductor equivalent resistance, can only be now connecing of maximum possible when pressing equal with the voltage at power supply section two ends Closely, but voltage can not be essentially equal), reach maximum by the electric current of LED, now LED is the brightest；

If at a time, the hands of user leaves the second touch point, the 3rd touch point, then electric capacity does not recharges, Its both end voltage is maintained at steady state value, and now the equivalent resistance of metal-oxide-semiconductor is also maintained at certain steady state value, and its effect is: LED Brightness remains in the brightness in this moment；

If at a time, the hands of user touches the first touch point, the second touch point simultaneously, then electric capacity passes through people Body discharges, and its both end voltage is gradually lowered, and now the equivalent resistance of metal-oxide-semiconductor is gradually increased, and is gradually subtracted by the electric current of LED Few, LED brightness the most constantly reduces, and when the voltage at electric capacity two ends drops to below the threshold voltage of metal-oxide-semiconductor, metal-oxide-semiconductor ends, LED loop does not has electric current to flow through, and LED is extinguished.

2, the utility model has the advantages that:

A, structure are very simple, and are applicable to the use requirement of LED under low-voltage, and production cost is low, carries the most square Just；

B, by touch by the way of be controlled, decrease the mechanical breakdown that Mechanical course is brought；

2, the time spent during determining charging and discharging due to the capacity of electric capacity, it is considered to the usual resistance value of human body And other voltages, resistance parameter value, select suitable capacitance most important, capacitance of the present utility model selects 5 microfarads To 20 microfarads, the time making electric capacity charge or discharge is the most reasonable, so LED is lightened, time of dimming properly sets Put.

3, described power supply section is the aneroid battery that at least two joints are connected in series, and this structure is adaptive with aforementioned circuit, overall structure The simplest；On the other hand, the voltage of two joint aneroid battery series connection is about 3V, and common white light LEDs turning-on voltage is generally 2-3 lies prostrate, and uses at least two joint aneroid battery, can facilitate the selection of LED.

4, described second touch point includes first point of contact and second point of contact, will be divided into two in the second touch point, point Near electric discharge, charging side, more convenient operation, by electric discharge, charge well separated, it is to avoid maloperation occurs.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of the adjustable touch LED control circuit of brightness described in this utility model embodiment one；

Fig. 2 is the enlarged drawing of metal-oxide-semiconductor；

Fig. 3 is the circuit diagram of the adjustable touch LED control circuit of brightness described in this utility model embodiment two；

Description of reference numerals:

10, LED, 20, metal-oxide-semiconductor, D, drain electrode, G, grid, S, source electrode, 30, electric capacity, the 40, first touch point, 50, second Touch point, 51, first point of contact, 52, second point of contact, the 60, the 3rd touch point, 70, power supply section.

Detailed description of the invention

Below embodiment of the present utility model is described in detail.

Embodiment one

As shown in Figure 1 and Figure 2, the adjustable touch LED control circuit of brightness, this control circuit includes: LED 10, MOS Pipe 20, electric capacity 30, power supply section 70 and the first touch point 60, the 40, second touch point the 50, the 3rd, touch point, the positive pole of LED and power supply The positive pole in portion 70 connects, and the negative pole of LED connects with the drain D of metal-oxide-semiconductor 20, the negative pole phase of the source S of metal-oxide-semiconductor 20 and power supply section 70 Connecing, the source S of metal-oxide-semiconductor 20, the grid G of metal-oxide-semiconductor 20 connect with the 40, second touch point 50, aforementioned first touch point respectively, aforementioned Electric capacity 30 is between the source S of metal-oxide-semiconductor 20, the grid G of metal-oxide-semiconductor 20；3rd touch point 60 connects with the positive pole of power supply section 70.

Wherein, described power supply section 70 is that the aneroid battery of two joint 1.5V is in series, and the capacity of described electric capacity 30 is 10 microfarads. In the present embodiment, metal-oxide-semiconductor 20 needs the model selecting threshold voltage to lie prostrate at 1-1.5, so can carry out LED 10 easily Brightness regulation or closedown.

1, the principle of the present embodiment is:

In an initial condition, the voltage between 30 two electrodes of electric capacity is zero, and the hands of user touches second simultaneously and touches Touch a little the 50, the 3rd touch point 60, now, by the effect of human body resistance, the both positive and negative polarity of power supply section 70 is turned on, and to electric capacity 30 Being charged, the voltage of electric capacity 30 gradually rises, due to electric capacity 30 two ends respectively with drain D, the source of metal-oxide-semiconductor 20 of metal-oxide-semiconductor 20 Pole S is in parallel, so, the drain D of metal-oxide-semiconductor 20, metal-oxide-semiconductor 20 source S between voltage equal to the voltage at electric capacity 30 two ends, work as electricity When the voltage of appearance 30 rises to the threshold voltage of metal-oxide-semiconductor 20, metal-oxide-semiconductor 20 turns on, and power supply section 70, LED 10, metal-oxide-semiconductor 20 are constituted Power circuit, LED 10 is luminous；

If now finger is not removed, the voltage at electric capacity 30 two ends can continue slowly to rise, the drain D of metal-oxide-semiconductor 20 and source Equivalent resistance between the S of pole constantly declines, and is persistently risen by the electric current of LED 10, and the brightness of LED 10 is gradually increased；When (owing to metal-oxide-semiconductor 20 still has equivalent resistance, now only when the voltage at electric capacity 30 two ends is equal with the voltage at power supply section 70 two ends Can be the close of maximum possible, but voltage can not be essentially equal), reach maximum by the electric current of LED 10, now LED 10 is the brightest；

If at a time, the hands of user leaves the second touch point 60, touch point the 50, the 3rd, then electric capacity 30 is no longer Charging, its both end voltage is maintained at steady state value, and now the equivalent resistance of metal-oxide-semiconductor 20 is also maintained at certain steady state value, and its effect is: The brightness of LED 10 remains in the brightness in this moment；

If at a time, the hands of user touches the 40, second touch point 50, then electric capacity 30, the first touch point simultaneously By human body discharge, its both end voltage is gradually lowered, and now the equivalent resistance of metal-oxide-semiconductor 20 is gradually increased, by the electricity of LED 10 Stream gradually decreases, and LED 10 brightness the most constantly reduces, when the voltage at electric capacity 30 two ends drop to the threshold voltage of metal-oxide-semiconductor 20 with Time lower, metal-oxide-semiconductor 20 ends, and LED 10 loop does not has electric current to flow through, and LED 10 is extinguished.

2, advantage of this embodiment is that:

A, structure are very simple, and are applicable to the use requirement of LED 10 under low-voltage, and production cost is low, carries very Convenient；

2, the time spent during determining charging and discharging due to the capacity of electric capacity 30, it is considered to the usual resistance of human body Value and other voltages, resistance parameter value, select suitable electric capacity 30 capacity most important, and the electric capacity 30 of the present embodiment is worth selection 5 Microfarad is to 20 microfarads, and the time making electric capacity 30 charge or discharge is the most reasonable, so LED 10 is lightened, time of dimming enters Row is suitable to be arranged.

3, described power supply section 70 is the aneroid battery that at least two joints are connected in series, and this structure is adaptive with aforementioned circuit, overall knot Structure is the simplest；On the other hand, the voltage of two joint aneroid battery series connection is about 3V, and common white light LEDs turning-on voltage is general Lie prostrate for 2-3, use at least two joint aneroid battery, the selection of LED 10 can be facilitated.

Embodiment two

As it is shown on figure 3, in the present embodiment, described second touch point 50 includes first point of contact 51 and second point of contact 52, Wherein, first point of contact 51 is near described first touch point 40, and second point of contact 52 is near described 3rd touch point 60.

Described second touch point 50 includes first point of contact 51 and second point of contact 52, will be divided into two in the second touch point 50 Individual, respectively close to electric discharge, charging side, more convenient operation, by electric discharge, charge well separated, it is to avoid maloperation occurs.

These are only specific embodiment of the utility model, do not limit protection domain of the present utility model with this；Not Any replacement made on the basis of violating this utility model design and improvement, all belong to protection domain of the present utility model.

Claims

1. the adjustable touch LED control circuit of brightness, it is characterised in that this control circuit includes: LED, metal-oxide-semiconductor, electric capacity, Power supply section and the first touch point, the second touch point, the 3rd touch point, the positive pole of LED connects with the positive pole of power supply section, and LED's is negative Pole connects with the drain electrode of metal-oxide-semiconductor, and the source electrode of metal-oxide-semiconductor connects with the negative pole of power supply section, the source electrode of metal-oxide-semiconductor, the grid difference of metal-oxide-semiconductor Connecting with aforementioned first touch point, the second touch point, aforementioned electric capacity is between the source electrode of metal-oxide-semiconductor, the grid of metal-oxide-semiconductor；3rd Touch point connects with the positive pole of power supply section.

2. the adjustable touch LED control circuit of brightness as claimed in claim 1, it is characterised in that the capacity of described electric capacity is 5 Microfarad is to 20 microfarads.

3. the adjustable touch LED control circuit of brightness as claimed in claim 1, it is characterised in that described power supply section is at least Two save the aneroid battery being connected in series.

4. the adjustable touch LED control circuit of brightness as according to any one of claims 1 to 3, it is characterised in that described Two touch points include first point of contact and second point of contact, and wherein, first point of contact is near described first touch point, and second point is touched Point is near described 3rd touch point.