WO2018090418A1

WO2018090418A1 - Breathing light control circuit

Info

Publication number: WO2018090418A1
Application number: PCT/CN2016/110137
Authority: WO
Inventors: 李祥明; 钟伟文
Original assignee: 广州炒米信息科技有限公司
Priority date: 2016-11-17
Filing date: 2016-12-15
Publication date: 2018-05-24
Also published as: CN106455233A

Abstract

Disclosed is a breathing light control circuit, comprising: a power supply modulation circuit, an indicator light drive circuit, a processing module and a plurality of light-emitting diodes, wherein each of the light-emitting diodes is connected to the power supply modulation circuit and the indicator light drive circuit respectively; and the processing module is connected to the power supply modulation circuit and the indicator light drive circuit respectively. A processing module outputs a signal to an indicator light drive circuit by means of a plurality of output ends, and by means of light-emitting diodes corresponding to the indicator light drive circuit emitting light, and by means of outputting a signal to the power supply modulation circuit, power supply to the light-emitting diodes is controlled, thus realizing a breathing effect of the light-emitting diodes. The breathing light control circuit has the characteristics of higher flexibility in use and low cost.

Description

Breathing light control circuit

Technical field

The invention relates to the field of illumination control technology, in particular to a breathing lamp control circuit.

Background technique

Breathing light refers to the gradual change of light from light to dark under control. The light is normally lit or extinguished like a breath. Breathing lights are generally used for indications or prompts. They are widely used in various electronic devices, such as mobile phones, which can effectively improve the indication efficiency of electronic devices and make electronic devices more convenient to use.

The conventional breathing lamp uses an integrated driving circuit to drive the LED (Light Emitting Diode) lamp. Such a driving circuit has a high cost, a single function, and a poor flexibility.

Summary of the invention

Based on this, it is necessary to provide a breathing light control circuit for the conventional driving lamp with high cost, simple function and poor flexibility.

A breathing light control circuit includes: a power supply modulation circuit, an indicator light driving circuit, a processing module, and a plurality of light emitting diodes, wherein each of the light emitting diodes is respectively connected to the power source modulation circuit and the indicator light driving circuit, and the processing module Connected to the power modulation circuit and the indicator driving circuit respectively;

The indicator driving circuit includes a plurality of driving sub-circuits corresponding to each of the LEDs, and the processing module is provided with a plurality of output ends corresponding to the driving sub-circuits, and each of the driving sub-circuits respectively Connected to a corresponding output end and a corresponding light emitting diode;

The driving sub-circuit includes a front resistor, a triode and a rear resistor, and a corresponding negative pole of the LED is connected to a collector of the triode through the front resistor, and a base of the triode passes through the rear resistor and a corresponding The output is connected, and the emitter of the transistor is grounded.

In one embodiment, the plurality of light emitting diodes include a light emitting diode LED1, a light emitting diode LED2, and a light emitting diode LED3, and the power supply modulating circuit and the light emitting diode respectively LED1, the light emitting diode LED2 and the light emitting diode LED3 are connected, and the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3 are respectively connected to the indicator driving circuit;

The indicator driving circuit includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a transistor Q3, a transistor Q4, and a transistor Q5. The anode of the LED1 is connected to a power modulation circuit, and the LED a cathode of the diode LED1 is connected to a collector of the transistor Q3 via a resistor R5, a base of the transistor Q3 is connected to a first output end of the processing module via a resistor R8, and an emitter of the transistor Q3 is grounded, The anode of the LED 2 is connected to the power supply modulation circuit, the cathode of the LED1 is connected to the collector of the transistor Q4 via a resistor R6, and the base of the transistor Q4 passes through the resistor R9 and the second output of the processing module. The terminal is connected, the emitter of the transistor Q4 is grounded, the anode of the LED 2 is connected to a power modulation circuit, and the cathode of the LED 1 is connected to the collector of the transistor Q5 via a resistor R7, the transistor Q5 The base is connected to the third output of the processing module via a resistor R10, the emitter of which is grounded.

In one embodiment, the power modulation circuit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a transistor Q1, and a transistor Q2. One end of the resistor R1 is connected to a power source, and the other end of the resistor R1 is Connected to the emitter of the transistor Q1, the collector of the transistor Q1 is connected to each of the light emitting diodes, and the base of the transistor Q1 is connected to the collector of the transistor Q2 through the resistor R3. The base of the transistor Q2 is connected to the fourth output end of the processing module through the resistor R4, the emitter of the transistor Q2 is grounded, one end of the resistor R2 is connected to the power source, and the other end of the resistor R2 is The collector connection of the transistor Q2 is described.

In one embodiment, the power modulation circuit further includes a capacitor C1, and the collector of the transistor Q1 is also grounded through the capacitor C1.

In one of the embodiments, the processing module includes a processing chip.

In one of the embodiments, the processing chip comprises an S905 chip.

In one embodiment, the GPIOX_0 pin, the GPIOX_1 pin, and the GPIOX_2 pin of the S905 chip are respectively connected to the indicator driving circuit.

In one embodiment, the GPIOX_7 pin of the S905 chip is modulated with the power supply. Road connection.

In one embodiment, the GPIOX_7 pin of the S905 chip is coupled to the power modulation circuit via a resistor R262.

In one of the embodiments, the VDDIO_X pin of the S905 chip is used to connect to a power source.

The breathing lamp control circuit, the processing module outputs a signal to the indicator driving circuit through a plurality of output ends, emits light through the corresponding LED of the indicator driving circuit, and outputs a signal to the power modulation circuit to control the power supply to the LED, thereby implementing illumination The diode's breathing effect is characterized by greater flexibility and low cost.

In other technical solutions, the processing module outputs signals through the first output end, the second output end, and the third output end, and controls the LEDs of the LED, the LED 2 and the LED 3 to emit light, and outputs signals to the power modulation circuit to control the pair. The power supply of the light-emitting diode LED1, the light-emitting diode LED2 and the light-emitting diode LED3 enables the light-emitting diode LED1, the light-emitting diode LED2 and the light-emitting diode LED3 to realize the colorful indication and the colorful breathing function, and has the characteristics of higher flexibility of use and low cost.

DRAWINGS

1 is a circuit schematic diagram of a breathing light control circuit of an embodiment;

2 is a schematic diagram of the connection of a processing module of an embodiment.

detailed description

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the understanding of the present disclosure will be more fully understood.

For example, a breathing light control circuit includes a power supply modulation circuit, an indicator light driving circuit, a processing module, and a plurality of light emitting diodes, each of the light emitting diodes being respectively connected to the power source modulation circuit and the indicator light driving circuit, The processing module is respectively connected to the power modulation circuit and the indicator driving circuit; the indicator driving circuit includes a one-to-one correspondence with each of the LEDs a plurality of driving sub-circuits, the processing module is provided with a plurality of output ends corresponding to the driving sub-circuits, and each of the driving sub-circuits respectively has a corresponding output end and a corresponding one of the light-emitting diodes Each of the light-emitting diodes corresponds to one of the driving sub-circuits, and each of the driving sub-circuits corresponds to one of the output ends; for example, a power supply modulating circuit is connected to each of the light-emitting diodes, and each of the light-emitting diodes respectively passes through The driver sub-circuit is correspondingly connected to one of the output ends of the processing module. The driving sub-circuit includes a front resistor, a triode and a rear resistor, and a corresponding negative pole of the LED is connected to a collector of the triode through the front resistor, and a base of the triode passes through the rear resistor and a corresponding The output is connected, and the emitter of the transistor is grounded.

In the above breathing lamp control circuit, the wavelengths of the light emitted by the light emitting diodes are differently set. For example, the colors of the light emitted by the light emitting diodes are different, and the processing module outputs signals to the indicator driving circuit through a plurality of output terminals, and is driven by the indicator lights. The LED corresponding to the circuit emits light, and outputs a signal to the power supply modulation circuit to control the power supply to the LED, thereby realizing the breathing effect of the LED, and the color of the light emitted by each LED is different, thereby realizing the colorful indication. And colorful breathing function, featuring greater flexibility and low cost.

For example, a plurality of light emitting diodes include more than two light emitting diodes; for example, the plurality of light emitting diodes include a light emitting diode LED1 (also referred to as a first light emitting diode, the same below), a light emitting diode LED2, and a light emitting diode LED3, the power modulation The circuit is respectively connected to the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3, and the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3 are respectively connected to the indicator driving circuit; The indicator driving circuit correspondingly includes a driving sub-circuit 1 (also referred to as a first driving sub-circuit, the same below), a driving sub-circuit 2 and a driving sub-circuit 3; the processing module correspondingly sets an output end 1 (also referred to as The first output end, the same as the output end 2 and the output end 3; the LED 1 is connected to the output end 1 of the processing module through the driving sub-circuit 1, and the LED 2 is connected to the processing module through the driving sub-circuit 2 The output terminal 2, the LED 3 is connected to the output 3 of the processing module via the driving sub-circuit 3. It will be appreciated that when the number of light emitting diodes is other, the related embodiments are analogous.

For example, the indicator driving circuit includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a transistor Q3, a transistor Q4, and a transistor Q5; wherein the driver circuit 1 The resistor R5, the transistor Q3 and the resistor R8 are included. The driving sub-circuit 2 includes a resistor R6, a transistor Q4 and a resistor R9. The driving sub-circuit 3 includes a resistor R7, a transistor Q5 and a resistor R10. The anode of the LED1 is connected to a power supply modulation circuit. The cathode of the LED1 is connected to the collector of the transistor Q3 via a resistor R5, and the base of the transistor Q3 is connected to the first output of the processing module via a resistor R8. The emitter of the transistor Q3 Grounding, the anode of the LED 2 is connected to a power supply modulation circuit, the cathode of the LED1 is connected to the collector of the transistor Q4 via a resistor R6, and the base of the transistor Q4 passes through the resistor R9 and the processing module. The second output terminal is connected, the emitter of the transistor Q4 is grounded, the anode of the LED diode 2 is connected to the power supply modulation circuit, and the cathode of the LED LED1 is connected to the collector of the transistor Q5 through the resistor R7. The base of the transistor Q5 is connected to the third output of the processing module via a resistor R10, and the emitter of the transistor Q5 is grounded.

In one embodiment, as shown in FIG. 1 , a breathing light control circuit includes: a power modulation circuit, an indicator driving circuit, a light emitting diode LED1, a light emitting diode LED2, a light emitting diode LED3, and a processing module, and the power modulation circuit Connected to the light emitting diode LED1, the light emitting diode LED2, and the light emitting diode LED3, respectively, the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3 are respectively connected to the indicator driving circuit, An indicator driving circuit is connected to the processing module, and the power modulation circuit is connected to the processing module;

For example, the light emitting diode LED1, the light emitting diode LED2, and the light emitting diode LED3 are respectively disposed differently, for example, the light emitting diode LED1, the light emitting diode LED2, and the light emitting diode LED3 are respectively different from each other. For example, the light-emitting color of the light-emitting diode LED1, the light-emitting diode LED2, and the light-emitting diode LED3 are different. For example, the light-emitting diode LED1 is a green light LED, the light-emitting diode LED2 is a red light LED, and the light-emitting diode LED3 is a blue light LED. In this way, the breathing lamp control circuit can enable the LED lamp to emit light of different colors, indicating better effect and more flexibility.

For example, the first output end, the second output end, and the third output end of the processing module are used to output a switch signal, and the switch signal is used to control the switches of the LED, the LED 2 and the LED 3, respectively, that is, the switch signals respectively It is used to control the lighting and extinction of the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3. For example, the first output end, the second output end, and the third output end of the processing module output an active high level, that is, a high output outputted at the first output end, the second output end, and the third output end of the processing module. In normal times, the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3 are turned on, that is, the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3 are illuminated.

Specifically, when the first output terminal outputs a high level, the transistor Q3 is turned on, so that the circuit of the LED 1 is turned on, the LED 1 is turned on, and then turned on; when the second output outputs a high level, the transistor Q4 is turned on. The light-emitting diode LED2 is turned on, and the light-emitting diode LED2 is turned on; when the third output terminal outputs a high level, the transistor Q5 is turned on, so that the circuit of the light-emitting diode LED3 is turned on, and the light-emitting diode LED3 is turned on.

In this embodiment, the processing module outputs the signals through the first output end, the second output end, and the third output end, and controls the light emitting diode LED1, the light emitting diode LED2, and the light emitting diode LED3 to emit light, and outputs a signal to the power supply modulating circuit to control the pair. The power supply of the light-emitting diode LED1, the light-emitting diode LED2 and the light-emitting diode LED3 enables the light-emitting diode LED1, the light-emitting diode LED2 and the light-emitting diode LED3 to realize the colorful indication and the colorful breathing function, and has the characteristics of higher flexibility of use and low cost.

In one embodiment, the power modulation circuit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a transistor Q1, and a transistor Q2. One end of the resistor R1 is connected to a power source, and the resistor R1 The other end of the transistor Q1 is connected to the emitter of the transistor Q1, and the collector of the transistor Q1 is respectively connected to the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3, and the base of the transistor Q1 passes through The resistor R3 is connected to the collector of the transistor Q2, the base of the transistor Q2 is connected to the fourth output end of the processing module through the resistor R4, the emitter of the transistor Q2 is grounded, and the resistor R2 One end is connected to a power source, and the other end of the resistor R2 is connected to the collector of the transistor Q2.

In order to make the power supply to the LED more stable, in one embodiment, the power modulation circuit further includes a capacitor C1, and the collector of the transistor Q1 is also grounded through the capacitor C1, such that the current input to the power source passes through the capacitor. The filtering of C1 makes the current supplied to the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3 more stable.

In this embodiment, the power source is a power supply, and the power modulation circuit is configured to modulate the current delivered by the power supply and output to the indicator driving circuit to control the illumination of the LED.

The fourth output of the processing module is configured to output a pulse modulation signal to the power modulation circuit, and the pulse modulation signal is used to control the brightness of the light emitting diode LED1, the light emitting diode LED2, and the light emitting diode LED3. In this way, the pulse modulation signal combines the switching signals of the first output end, the second output end and the third output end, so that the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3 can generate a breathing effect, for example, the brightness of the LED light after lighting It gradually brightens from darkness and gradually darkens from bright. For example, the pulse modulation signal is also used to control the breathing length of the light emitting diode LED1, the light emitting diode LED2, and the light emitting diode LED3, that is, to control the length of time that the LED light is gradually illuminated from dark, and gradually darkened by light.

In one embodiment, the processing module includes a processing chip. For example, the processing chip includes an S905 chip. For example, the processing chip is an S905 chip of Amlogic Corporation. For example, as shown in FIG. 3, the GPIOX_0 pin, the GPIOX_1 pin, and the GPIOX_2 pin of the S905 chip are respectively connected to the indicator driving circuit. That is, in this embodiment, the GPIOX_0 pin, the GPIOX_1 pin, and the GPIOX_2 pin of the S905 chip are respectively connected to the indicator driving circuit as the first output terminal, the second output terminal, and the third output terminal of the processing module, for example, the The GPIOX_7 pin of the S905 chip is connected to the power modulation circuit. For example, the GPIOX_7 pin of the S905 chip is connected to the power modulation circuit through a resistor R262, that is, in the embodiment, the GPIOX_7 of the S905 chip. The pin is connected to the power modulation circuit as a fourth output of the processing module. For example, the VDDIO_X pin of the S905 chip is connected to a power source. For example, the power source is a DC power source for supplying an operating current to the S905 chip. For example, the power source connected to the VDDIO_X pin of the S905 chip is different from the power source connected to the power modulation circuit. For example, the VDDIO_X pin of the S905 chip is connected to the first power source, and the power modulation circuit is connected to the second power source.

For example, please refer to FIG. 2 and FIG. 3, the GPIOX_0 pin of the S905 chip is connected to the base of the transistor Q3 through the resistor R8, the GPIOX_1 pin of the S905 chip is connected to the base of the transistor Q4 through the resistor R9, and the GPIOX_2 pin of the S905 chip passes the resistor R10. Connected to the base of transistor Q5, the GPIOX_7 pin of the S905 chip is connected to the base of transistor Q2 via resistor R4.

The following is a specific embodiment:

The input and output parameters of the control algorithm consist of 6 input variable parameters and 4 output control variables. In this embodiment, the LED 1 is a green LED, the LED 2 is a red LED, and the LED 3 is a blue LED. The processing module calculates 4 output control variables according to the parameters of the 6 input variables, 4 The output control variable is used to output to the indicator drive circuit to control the operation of each LED lamp. The six input parameters are BRTH, T, S, RI, GI and BI; the four output variables are PWM, RO, GO and BO.

Description of each parameter:

BRTH: Breathing mode, an integer ranging from 0-10, 0 indicates no breathing, and 1-10 indicates 10 different breathing patterns.

T: The period of breathing, ranging from 0.1 second to 10 seconds, stepped for 0.1 second.

S: The speed of the brightness of the breathing lamp is gradual, ranging from 0-100; 0 is the slowest and 100 is the fastest.

RI: Red LED light input, 0 means not participating in breathing, 1 means participating in breathing.

GI: Green LED light input, 0 means not participating in breathing, 1 means participating in breathing.

BI: Blue LED light input, 0 means not participating in breathing, 1 means participating in breathing.

PWM: Pulse width modulated signal, output to the power supply modulation circuit, used to adjust the brightness of the LED light, which is a continuously changing signal, calculated from the input parameters T and S.

RO: Output to the indicator drive circuit for controlling the switch of the red LED.

GO: Output to the indicator drive circuit for controlling the switch of the green LED.

BO: Output to the indicator drive circuit for controlling the switch of the blue LED.

In this embodiment, the six input variable parameters and the four output control variables are calculated as:

The first input variable RO is obtained, and the first output variable RI is output according to the first input variable RO.

The second input variable GO is obtained, and the second output variable GI is output according to the second input variable RO.

A third input variable BO is obtained, and a third output variable BI is output according to the third input variable RO.

Obtain the respiratory variable BRTH, the respiratory cycle T and the respiratory frequency S, and detect whether the respiratory variable BRTH is zero. If yes, the fourth output variable PWM is output according to the respiratory variable BRTH, otherwise, according to the respiratory variable BRTH, the respiratory cycle T and the respiratory frequency S The fourth output variable outputs a fourth output variable PWM. For example, the fourth output variable PWM output according to the breathing variable BRTH is 0, for example.

In this embodiment, the calculation process is:

RO=RI;

GO=GI;

BO=BI;

IF BRTH=0, PWM=1.

IF BRTH=1-10, PWM=t*BRTH*(S+1)/100T, where t is the time of continuous change, taking values from 0-T to T-0, with a step size of 0.1 second.

It should be noted that, in the foregoing system embodiment, each module included is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be implemented; in addition, the specific name of each functional unit It is also for convenience of distinguishing from each other and is not intended to limit the scope of protection of the present invention.

In addition, those skilled in the art can understand that all or part of the steps of implementing the above embodiments may be completed by a program to instruct related hardware, and the corresponding program may be stored in a readable storage medium.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that for this A person skilled in the art can make several modifications and improvements without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A breathing lamp control circuit, comprising: a power supply modulation circuit, an indicator light driving circuit, a processing module and a plurality of light emitting diodes, wherein each of the light emitting diodes is respectively connected to the power source modulation circuit and the indicator light driving circuit, The processing module is respectively connected to the power modulation circuit and the indicator driving circuit;

The indicator driving circuit includes a plurality of driving sub-circuits corresponding to each of the LEDs, and the processing module is provided with a plurality of output ends corresponding to the driving sub-circuits, and each of the driving sub-circuits respectively Connected to a corresponding output end and a corresponding light emitting diode;

The driving sub-circuit includes a front resistor, a triode and a rear resistor, and a corresponding negative pole of the LED is connected to a collector of the triode through the front resistor, and a base of the triode passes through the rear resistor and a corresponding The output is connected, and the emitter of the transistor is grounded.
The breathing lamp control circuit according to claim 1, wherein the plurality of light emitting diodes comprise a light emitting diode LED1, a light emitting diode LED2, and a light emitting diode LED3, wherein the power source modulating circuit and the light emitting diode LED1 respectively emit the light a diode LED2 and the light emitting diode LED3 are connected, and the light emitting diode LED1, the light emitting diode LED2 and the light emitting diode LED3 are respectively connected to the indicator driving circuit;

The indicator driving circuit includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a transistor Q3, a transistor Q4, and a transistor Q5. The anode of the LED1 is connected to a power modulation circuit, and the LED a cathode of the diode LED1 is connected to a collector of the transistor Q3 via a resistor R5, a base of the transistor Q3 is connected to a first output end of the processing module via a resistor R8, and an emitter of the transistor Q3 is grounded, The anode of the LED 2 is connected to the power supply modulation circuit, the cathode of the LED1 is connected to the collector of the transistor Q4 via a resistor R6, and the base of the transistor Q4 passes through the resistor R9 and the second output of the processing module. The terminal is connected, the emitter of the transistor Q4 is grounded, the anode of the LED 2 is connected to a power modulation circuit, and the cathode of the LED 1 is connected to the collector of the transistor Q5 via a resistor R7, the transistor Q5 The base is connected to the third output of the processing module via a resistor R10, the emitter of which is grounded.
A breathing light control circuit according to claim 1 wherein said power modulation The circuit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a transistor Q1, and a transistor Q2. One end of the resistor R1 is connected to a power source, and the other end of the resistor R1 is connected to an emitter of the transistor Q1. The collectors of the transistors Q1 are respectively connected to the respective light emitting diodes, the base of the transistor Q1 is connected to the collector of the transistor Q2 through the resistor R3, and the base of the transistor Q2 passes through the resistor R4 and The fourth output end of the processing module is connected, the emitter of the transistor Q2 is grounded, one end of the resistor R2 is connected to a power source, and the other end of the resistor R2 is connected to the collector of the transistor Q2.
The breathing lamp control circuit according to claim 3, wherein the power supply modulation circuit further comprises a capacitor C1, and a collector of the transistor Q1 is also grounded through the capacitor C1.
The breathing light control circuit of claim 1 wherein said processing module comprises a processing chip.
The breathing light control circuit of claim 5 wherein said processing chip comprises a S905 chip.
The breathing lamp control circuit according to claim 6, wherein the GPIOX_0 pin, the GPIOX_1 pin, and the GPIOX_2 pin of the S905 chip are respectively connected to the indicator driving circuit.
The breathing lamp control circuit according to claim 6, wherein the GPIOX_7 pin of the S905 chip is connected to the power supply modulation circuit.
The breathing lamp control circuit according to claim 6, wherein the GPIOX_7 pin of the S905 chip is connected to the power supply modulation circuit via a resistor R262.
The breathing light control circuit according to claim 6, wherein the VDDIO_X pin of the S905 chip is used to be connected to a power source.