CN210381389U

CN210381389U - Flashlight application circuit for LED touch dimming

Info

Publication number: CN210381389U
Application number: CN201921201470.9U
Authority: CN
Inventors: 张纪方
Original assignee: Shenzhen Fushuo Optoelectronics Technology Co ltd
Current assignee: Shenzhen Fushuo Optoelectronics Technology Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-04-21
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses an LED touch dimming flashlight application circuit, comprising a charging circuit, a charging and discharging protection circuit, a battery, a touch dimming circuit and an LED lamp; an input end of the charging circuit is connected to an external input power supply, The output end of the charging circuit is connected to the input end of the charge and discharge protection circuit and the touch dimming circuit respectively, the output end of the touch dimming circuit is connected to the LED lamp, and the output end of the charge and discharge protection circuit is connected to the battery, The output end of the battery is connected with the input end of the touch dimming circuit. The utility model adopts LED lamps as the light source of the flashlight, and the illumination brightness is large; the touch dimming circuit is provided with a variety of dimming modes to meet the needs of users in different environments; a charging and discharging protection circuit is arranged between the charging circuit and the battery, Real-time monitoring and protection of the battery to improve the safety of use.

Description

Flashlight application circuit for LED touch dimming

Technical Field

The utility model relates to a dimming circuit field especially relates to a flashlight application circuit that LED touch-control was adjusted luminance.

Background

In the prior art, the traditional iodine-tungsten lamp for a flashlight, a halogen lamp and a gas lamp are used as light sources, and an alkaline battery is used as a power supply, so that the main defects of the traditional iodine-tungsten lamp for a flashlight are that the luminous efficiency is low, the battery has insufficient cruising ability, the traditional iodine-tungsten lamp cannot be repeatedly used, and the environment pollution is great; the circuit dimming mode is single, different dimming modes cannot be selected according to different use environments, and specific use requirements of users are difficult to meet; in addition, the LED flashlight in the market also has the potential safety hazard problem, uses in the charging process and has certain safe risk.

Accordingly, the prior art is deficient and needs improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the LED touch control dimming flashlight application circuit has various dimming modes, can be charged for repeated use, and has a good protection effect on a battery.

The technical scheme of the utility model as follows: a flashlight application circuit for LED touch dimming comprises a charging circuit, a charging and discharging protection circuit, a battery, a touch dimming circuit and an LED lamp; the input end of the charging circuit is connected with an external input power supply, the output end of the charging circuit is respectively connected with the input ends of the charging and discharging protection circuit and the touch dimming circuit, the output end of the touch dimming circuit is connected with the LED lamp, the output end of the charging and discharging protection circuit is connected with the battery, and the output end of the battery is connected with the input end of the touch dimming circuit;

the charging circuit comprises a first chip, a first light emitting diode and a first capacitor, wherein the anode of the input power supply is connected with a first pin of the first chip U1 through a first capacitor, the cathode of the input power supply 6 is connected with a fourth pin of the first chip U1 through a first capacitor C1, and the fourth pin of the first chip U1 is also connected with the anode of the first light emitting diode D1;

the touch dimming circuit comprises a second chip, a second capacitor, a triode and a touch sensing module, wherein a fifth pin of the second chip is connected with the touch sensing module, a seventh pin of the second chip is connected with the triode and a base electrode, an emitting electrode of the triode is connected with an eighth pin of the second chip, the eighth pin of the second chip is connected with a second pin of the second chip through the second capacitor, the eighth pin of the second chip is connected with a sixth pin, a third pin of the second chip is connected with a second pin of the first chip, the first pin and the third pin of the second chip are simultaneously connected with the anode of the LED lamp, and a source electrode of the triode is simultaneously connected with the cathode of the LED lamp.

By adopting the technical scheme, in the flashlight application circuit for LED touch dimming, the charge-discharge protection circuit comprises a third chip and a third capacitor, the negative electrode of the input power supply is simultaneously connected with the first pin and the second pin of the third chip, the second pin of the third chip U3 is connected with the positive electrode of the LED lamp through the third capacitor, the negative electrode of the battery is simultaneously connected with the third pin and the sixth pin of the third chip, and the fifth pin of the third chip is simultaneously connected with the positive electrode of the battery and the positive electrode of the LED lamp.

By adopting the technical scheme, a first resistor is also connected in series between the seventh pin of the second chip and the base electrode of the triode in the LED touch dimming flashlight application circuit.

By adopting the technical scheme, in the LED touch dimming flashlight application circuit, the LED lamp is formed by connecting three LED lamps in parallel.

By adopting the technical scheme, in the flashlight application circuit for LED touch dimming, the battery is a lithium battery.

By adopting the technical proposal, the utility model adopts the LED lamp as the flashlight light source, the illumination brightness is large, and the luminous efficiency is high; the first chip is embedded in the charging circuit, the second chip is embedded in the touch dimming circuit, and multiple dimming modes can be set, so that the use requirements of users in different lighting environments are met; be equipped with charge-discharge protection circuit between charging circuit and battery, at the real-time supervision voltage of charging process, the protection battery improves the utility model discloses a security.

Drawings

FIG. 1 is a schematic circuit flow diagram of the present invention;

fig. 2 is a specific circuit diagram of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and fig. 2, a flashlight application circuit for LED touch dimming includes a charging circuit 1, a charging and discharging protection circuit 3, a battery 4, a touch dimming circuit 2, and an LED lamp 5; the input of charging circuit 1 is connected with external input power supply 6, the output of charging circuit 1 is connected with charge-discharge protection circuit 3, touch dimmer circuit 2's input respectively, touch dimmer circuit 2's output is connected with LED lamps and lanterns 5, charge-discharge protection circuit 3's output is connected with battery 4, battery 4's output and touch dimmer circuit 2's input are connected.

The charging circuit 1 includes a first chip U1, a first light emitting diode D1, and a first capacitor C1, the anode of the input power supply 6 is connected to a first pin of the first chip U1 through the first light emitting diode D1, the cathode of the input power supply 6 is connected to a fourth pin of the first chip U1 through the first capacitor C1, and the fourth pin of the first chip U1 is further connected to the anode of the first light emitting diode D1. The charging circuit 1 is connected with the input power supply 6 and can provide power for the LED lamp 5 and store electric energy for the secondary battery. The first chip U1 is a battery charging current control chip, and can regulate and control the charging current according to the battery capacity and the ring temperature. The first led D1 can indicate the charging status, and the status can be distinguished by the different colors of the first led D1 during the charging process and in the charging completed status.

The touch dimming circuit 2 comprises a second chip U2, a second capacitor C2, a triode Q1 and a touch sensing module SW, a fifth pin of the second chip U2 is connected with the touch sensing module SW, a seventh pin of the second chip U2 is connected with a triode Q1 and a base, an emitter of the triode Q1 is connected with an eighth pin of the second chip U2, an eighth pin of the second chip U2 is connected with a second pin of the second chip U2 through a second capacitor C2, an eighth pin of the second chip U2 is connected with a sixth pin, a third pin of the second chip U2 is connected with a second pin of the first chip U1, a first pin and a third pin of the second chip U2 are respectively connected with an anode of the LED lamp 5, and a source of the triode Q1 is simultaneously connected with a cathode of the LED lamp 5. The touch dimming circuit 2 can set a plurality of dimming modes according to different combinations of level signals in the sixth pin and the eighth pin of the second chip U2, so as to meet the requirement of the user for dimming in a specific environment. The touch sensing module SW can make different dimming modes according to the length of the touch time.

Specifically, when the sixth pin of the second chip U2 is a high level signal and the eighth pin is also a high level signal, the touch dimming mode is an LED touch stepless dimming mode without brightness memory and brightness prominence and darkness prominence. When the LED lamp 5 is powered on initially, the LED lamp is in an off state, and when the LED lamp is touched by clicking (the touch duration is less than 550ms), the on-off control of the light quantity can be realized. Once clicking and touching, the LED lamp 5 is on, and once clicking and touching again, the lamp is off, and the cycle is repeated, when the lamp light is on or off, the LED lamp 5 has no brightness buffer, and the initial brightness of the lighting of the lamp light is 50% of the full brightness; when long-time pressing touch (the touch duration is more than 550ms), stepless brightness adjustment of lamplight can be realized. The light brightness gradually increases when the long press touch is performed for one time, the light brightness stops at the brightness corresponding to the release moment when the release is performed, and if the long press touch exceeds 3s, the light brightness does not change after reaching the maximum brightness; and (3) pressing for a long time again to touch, gradually reducing the brightness of the lamp light, stopping the brightness of the lamp light corresponding to the loosening etching when the lamp light is loosened, and keeping the brightness of the lamp light unchanged after reaching the minimum brightness if the time exceeds 3 s.

When the sixth pin of the second chip U2 is a low level signal and the eighth pin is a high level signal, the touch dimming mode is an LED touch stepless dimming mode without brightness memory and gradually changing to bright and dark. The mode is that on the basis of the LED touch stepless dimming function without brightness memory, the light is slowly and smoothly transited from the lower brightness to the initial brightness of the turned-on lamp when the light is turned on and turned off by touch, and the light is slowly and smoothly reduced from the current brightness until the light is turned off when the light is turned off by touch, so that the visual buffering effect of the slow change of the brightness is achieved, and the effect of protecting eyes and eyesight is achieved.

When the sixth pin of the second chip U2 is a high level signal and the eighth pin is a low level signal, the touch dimming mode is an LED touch stepless dimming mode with brightness memory and gradual dimming. The mode is based on the LED touch stepless dimming mode without brightness memory and gradually changing light and dark, and the brightness memory function is added. Namely, under the condition that the input power supply 6 is kept connected, the brightness when the lamp is turned off by clicking touch each time can be memorized, and the brightness can be used as the initial brightness when the lamp is turned on by clicking touch next time; when the input power supply 6 is turned off, the light is turned on by the first click touch after the input power supply 6 is switched on again, and the initial brightness is fixed to 50% of the full brightness.

When the sixth pin of the second chip U2 is a low level signal and the eighth pin is a low level signal, the touch dimming mode is an LED three-segment touch dimming mode. When the lamp is initially electrified, the lamp is in an off state, and the brightness of the lamp light sequentially changes according to the sequence of low brightness, medium brightness and high brightness when the touch is clicked every time. Namely, the LED lamp 5 is lighted for the first touch, the brightness is increased for the second touch, the brightness is brightest for the third touch, and the lamp is turned off for the fourth touch.

Preferably, the charge and discharge protection circuit 3 includes a third chip U3 and a third capacitor C3, the negative electrode of the input power source 6 is further connected to the first pin and the second pin of the third chip U3, respectively, the second pin of the third chip U3 is connected to the positive electrode of the LED lamp 5 through the third capacitor C3, the negative electrode of the battery 4 is connected to the third pin and the sixth pin of the third chip U3, respectively, and the fifth pin of the third chip U3 is connected to the positive electrode of the battery 4 and the positive electrode of the LED lamp 5, respectively. When the battery 4 is in the charging and discharging process, the third chip U3 detects that the voltage of the battery 4 reaches a preset value, and the third chip U3 can cut off a charging and discharging loop through the change of a level signal, so that the battery 4 is protected from overcharge and discharge. Preferably, the battery 4 is a lithium battery. The lithium battery has large electric capacity, high charging speed and long cycle life, and can meet the long-term uninterrupted use requirement of the flashlight.

Preferably, a first resistor R1 is connected in series between the seventh pin of the second chip U2 and the base of the transistor Q1.

Preferably, the LED lamp 5 is composed of three LED lamps connected in parallel.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A flashlight application circuit for LED touch dimming, characterized in that it comprises a charging circuit, a charging and discharging protection circuit, a battery, a touch dimming circuit and an LED lamp; an input end of the charging circuit is connected to an external input power supply The output end of the charging circuit is respectively connected with the input end of the charge and discharge protection circuit and the touch dimming circuit, the output end of the touch dimming circuit is connected with the LED lamp, and the output end of the charge and discharge protection circuit is connected with the battery , the output end of the battery is connected with the input end of the touch dimming circuit;

The charging circuit includes a first chip, a first light-emitting diode and a first capacitor, the positive electrode of the input power supply is connected to the first pin of the first chip U1 through the first, and the negative electrode of the input power supply 6 is connected to the first pin of the first chip U1 through the first The capacitor C1 is connected to the fourth pin of the first chip U1, and the fourth pin of the first chip U1 is also connected to the anode of the first light-emitting diode D1;

The touch dimming circuit includes a second chip, a second capacitor, a transistor and a touch sensing module, the fifth pin of the second chip is connected to the touch sensing module, and the seventh pin of the second chip is connected to the transistor and the base is connected, the emitter of the triode is connected to the eighth pin of the second chip, the eighth pin of the second chip is connected to the second pin of the second chip through the second capacitor, the The eighth pin of the second chip is connected to the sixth pin, the third pin of the second chip is connected to the second pin of the first chip, the first pin and the third pin of the second chip The feet are connected to the positive pole of the LED lamp at the same time, and the source of the triode is connected to the negative pole of the LED lamp at the same time.

2 . The dimming circuit with switching function according to claim 1 , wherein the charge and discharge protection circuit comprises a third chip and a third capacitor, and the negative electrode of the input power supply is also connected with the third chip of the third chip at the same time. 3 . The first pin and the second pin are connected, the second pin of the third chip U3 is connected to the positive electrode of the LED lamp through the third capacitor, and the negative electrode of the battery is connected to the third pin and the sixth pin of the third chip at the same time. The fifth pin of the third chip is connected to the positive pole of the battery and the positive pole of the LED lamp at the same time.

3 . The dimming circuit with switching function according to claim 1 , wherein a first resistor is connected in series between the seventh pin of the second chip and the base of the triode. 4 .

4 . The dimming circuit with switching function according to claim 1 , wherein the LED lamp is composed of three LED lamps connected in parallel. 5 .

5 . The dimming circuit with switching function according to claim 1 , wherein the battery is a lithium battery. 6 .