CN210469792U

CN210469792U - LED drive circuit, lighting device and intelligent mobile terminal

Info

Publication number: CN210469792U
Application number: CN201920265791.9U
Authority: CN
Inventors: 招春浪; 柯雁
Original assignee: Shenzhen Xing Ying Da Industry Co ltd
Current assignee: Shenzhen Xing Ying Da Industry Co ltd
Priority date: 2019-03-01
Filing date: 2019-03-01
Publication date: 2020-05-05
Anticipated expiration: 2029-03-01

Abstract

The utility model discloses a LED drive circuit, lighting device and intelligent Mobile terminal. The drive circuit comprises a direct-current power supply, a touch circuit and a main control circuit, wherein the output end of the direct-current power supply is used for connecting the LED lamp to provide electric energy for the LED lamp, the output end of the touch circuit is connected with the input end of the main control circuit, and the output end of the main control circuit is used for connecting the LED lamp to control the brightness and the color temperature of the LED lamp. The lighting device comprises a driving circuit and an LED lamp. The intelligent mobile terminal comprises the lighting device. The utility model discloses a set up DC power supply, touch-control circuit and master control circuit, DC power supply is used for supplying power to the LED lamp, and master control circuit is used for controlling the luminance and the colour temperature of LED lamp, has overcome among the prior art problem that mechanical switch durability is low, the unadjustable of colour temperature to a luminance colour temperature is controllable, convenient operation's LED drive circuit, lighting device and intelligent Mobile terminal are provided.

Description

LED drive circuit, lighting device and intelligent mobile terminal

Technical Field

The utility model belongs to the technical field of lighting device and specifically relates to a LED drive circuit, lighting device and intelligent Mobile terminal are related to.

Background

With the improvement of living standard of people, the mobile phone has become a necessity of life. If on sufficient daytime at the light source, shoot with the cell-phone camera and generally can both reach consumer's demand, but the photo that can lead to the photo not clear because of the light source is not enough in the not enough occasion of light or be in dark scene and shine, the luminous intensity is inhomogeneous, seriously influences the shooting effect of photo, needs the light filling lamp to compensate the light source, and current cell-phone is shot the light filling lamp and is had following defect: on one hand, the mechanical switch has the problem of low durability caused by excessive use times by adopting a control mode of the mechanical switch; on the other hand, most of the existing LED lamps belong to single-color temperature lamps, and when lamps with wider color temperature change are needed in practical application, the method of adding color filter paper is generally adopted to meet the requirement of different color temperatures, but the method often has the problems of uncontrollable output, troublesome operation, more inconvenience in fixing the color filter paper on the lamps and the like.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model aims at providing a luminance colour temperature is controllable, convenient operation's LED drive circuit and lighting device.

Therefore, a second object of the present invention is to provide an intelligent mobile terminal capable of supplementary lighting and adjusting the supplementary lighting brightness and color temperature.

The utility model adopts the technical proposal that: the utility model provides a LED drive circuit, includes DC power supply, touch-control circuit and master control circuit, DC power supply's output is used for connecting the LED lamp in order to provide the electric energy to it, touch-control circuit's output with master control circuit's input is connected, master control circuit's output is used for connecting the LED lamp is in order to control the luminance and the colour temperature of LED lamp.

Preferably, the LED driving circuit further includes a switch circuit, an output terminal of the main control circuit is connected to an input terminal of the switch circuit, an output terminal of the dc power supply is connected to an input terminal of the switch circuit, and an output terminal of the switch circuit is used for connecting the LED lamp.

Preferably, the LED driving circuit further includes a voltage boosting circuit, an output terminal of the switching circuit is connected to an input terminal of the voltage boosting circuit, and an output terminal of the voltage boosting circuit is used for connecting the LED lamp.

Preferably, the touch circuit comprises a touch key and a touch chip, an output end of the touch key is connected with an input end of the touch chip, and an output end of the touch chip is connected with an input end of the main control circuit.

Preferably, the touch key comprises a brightness adjusting key and a color temperature adjusting key.

An illumination device comprises the LED drive circuit and the LED lamp, wherein the output end of the LED drive circuit is connected with the input end of the LED lamp and used for driving the LED lamp.

Preferably, the lighting device further comprises a switch key, and an output end of the switch key is connected with an input end of the main control circuit and used for switching on/off the lighting device by one key.

Preferably, the LED lamp is a ring lamp.

An intelligent mobile terminal comprises the lighting device, and the lighting device is arranged at the top of the intelligent mobile terminal.

The utility model has the advantages that:

the utility model discloses a set up DC power supply, touch-control circuit and master control circuit, DC power supply is used for supplying power to the LED lamp, and master control circuit is used for controlling the luminance and the colour temperature of LED lamp, has overcome among the prior art problem that mechanical switch durability is low, the unadjustable of colour temperature to a luminance colour temperature is controllable, convenient operation's LED drive circuit, lighting device and intelligent Mobile terminal are provided.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of an LED driving circuit according to the present invention;

fig. 2 is a schematic circuit diagram of an embodiment of a touch control circuit of an LED driving circuit according to the present invention;

fig. 3 is a circuit diagram of an embodiment of a switching circuit of an LED driving circuit according to the present invention;

fig. 4 is a circuit diagram of an embodiment of a main control circuit of an LED driving circuit according to the present invention;

fig. 5 is a schematic structural diagram of an embodiment of an intelligent mobile terminal according to the present invention;

fig. 6 is a schematic structural diagram of a specific embodiment of a switch button of an intelligent mobile terminal according to the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The utility model provides a LED drive circuit, as shown in FIG. 1, this LED drive circuit includes DC power supply, touch control circuit and master control circuit. The output end of the direct current power supply is used for being connected with the LED lamp to provide electric energy for the LED lamp, the output end of the touch control circuit is connected with the input end of the main control circuit, and the output end of the main control circuit is used for being connected with the LED lamp to control the brightness and the color temperature of the LED lamp.

As an improvement of the technical solution, the LED driving circuit further includes a switching circuit. The output end of the main control circuit is connected with the input end of the switch circuit, the output end of the direct current power supply is connected with the input end of the switch circuit, and the output end of the switch circuit is used for being connected with the LED lamp.

As an improvement of the technical scheme, the LED driving circuit further comprises a boosting circuit. The output end of the switch circuit is connected with the input end of the booster circuit, and the output end of the booster circuit is used for being connected with the LED lamp.

In this embodiment, the on-off control of the switch circuit is performed through the main control circuit, so as to control whether the direct-current power supply supplies power to the boost circuit, the boost circuit boosts the voltage and then supplies power to the LED lamp, and finally the main control circuit is driven through the touch control circuit to adjust the brightness and the color temperature of the LED lamp.

In this embodiment, the dc power supply is a rechargeable lithium battery.

In this embodiment, the touch circuit includes a touch key and a touch chip. The output end of the touch key is connected with the input end of the touch chip, and the output end of the touch chip is connected with the input end of the main control circuit. The touch control key generates a touch control signal when being touched and sends the touch control signal to the main control circuit through the touch chip, and the main control circuit generates a control signal according to the touch control signal so as to control the brightness and the color temperature of the LED lamp.

In this embodiment, the touch key includes a brightness adjustment key and a color temperature adjustment key, which are respectively used for adjusting brightness and color temperature of the LED lamp.

Fig. 2 is a circuit schematic diagram of an embodiment of the middle touch circuit of the present invention, fig. 3 is a circuit schematic diagram of an embodiment of the middle switch circuit of the present invention, and fig. 4 is a circuit schematic diagram of an embodiment of the middle main control circuit of the present invention. In fig. 2, J4 and J5 are touch keys, U3 is a control chip BS802C, J2 is a white LED lamp, J3 is a warm white LED lamp, U4 in fig. 4 is a single chip microcomputer, and the model is STM8S003F 3.

With reference to fig. 2 to 4, the touch KEY J4 and the touch KEY J5 output two control signals KEY0 and KEY1 through the resistor R8 with a resistance of 100 Ω and the resistor R9 with a resistance of 100 Ω, respectively sent to the first pin 1 and the seventh pin 7 of the control chip U3, and then connected to the nineteenth pin 19 and the twentieth pin 20 of the single chip microcomputer U4 in fig. 4 through the second pin KOUT1_ GPIO and the third pin KOUT0_ GPIO, so as to send control signals to the single chip microcomputer U4. The single chip microcomputer sends a control signal to the switch circuit of fig. 3 through the first pin PWM1_ GPIO and the tenth pin PWM2_ GPIO to control the color temperature and the brightness of the LED lamp.

In fig. 2, the sixth pin 6 of the control chip U3 is connected to a 3.3V power supply, and a 0.1uF filter capacitor C9 is connected between the sixth pin 6 and ground. And a capacitor C8 with 10pF is connected between the fifth pin 5 of the control chip U3 and the ground. The fourth pin 4 of the control chip U3 is grounded, and the eighth pin 8 is grounded through a resistor R12.

In fig. 3, the power input terminal is VCC, and the boost circuit supplies 6V for power supply. The power input terminal VCC is connected to the positive electrode (first pin 1) of the positive white LED lamp J2 and the positive electrode of the warm white LED lamp J3, respectively. The negative electrode of the positive white LED lamp J2 is connected with the drain electrode of an NMOS tube Q3 through a resistor R4, the source electrode of the NMOS tube Q3 is grounded, the grid electrode of the NMOS tube Q3 is connected with a first pin PWM1_ GPIO of a single chip microcomputer U4 through a divider resistor R1 with the resistance value of 1K, and a resistor R5 with the resistance value of 10K is further connected between the divider resistor R1 and the ground. The first pin PWM1_ GPIO of the singlechip U4 controls the brightness change of the white LED lamp J2 through the circuit. The negative electrode of the warm white LED lamp J3 is connected with the drain electrode of an NMOS tube Q1 through a resistor R6, the source electrode of the NMOS tube Q1 is grounded, the grid electrode of the NMOS tube Q1 is connected with a tenth pin PWM2_ GPIO of the single chip microcomputer U4 through a divider resistor R2 with the resistance value of 1K, and a resistor R7 with the resistance value of 10K is further connected between the divider resistor R2 and the ground. The tenth pin PWM2_ GPIO of the singlechip U4 controls the change of the color temperature of the warm white LED lamp J3 through the circuit.

In this embodiment, the resistor R4 and the resistor R6 are 1206 package resistors, and other resistors and capacitors are 0603 chip resistors and 0603 chip capacitors.

The utility model also discloses a lighting device, including foretell LED drive circuit and LED lamp. The output end of the LED driving circuit is connected with the input end of the LED lamp and used for driving the LED lamp and adjusting the brightness and the color temperature of the LED lamp.

In this embodiment, the lighting device further includes a switch button, and an output end of the switch button is connected to an input end of the main control circuit, and is used for turning on/off the lighting device by one key.

In this embodiment, the LED lamp is an annular lamp, and may be a lamp of other shapes.

The utility model also discloses an intelligent mobile terminal, including foretell lighting device. The lighting device can be arranged on the top of the intelligent mobile terminal and is fixed through a clamp.

As shown in fig. 5, the structure diagram of an embodiment of the present invention is an intelligent mobile terminal. The intelligent mobile terminal is provided with a brightness adjusting key and a color temperature adjusting key, which are both touch keys (refer to the touch keys J4 and J5 in fig. 2). Of course, the brightness adjusting key and the color temperature adjusting key may be other types of physical keys or switches. The user can respectively adjust the brightness and the color temperature of the LED lamp by touching the two keys.

When the user uses intelligent Mobile terminal to shoot, can utilize this lighting device to carry out the light filling, the luminance and the colour temperature of light are adjustable moreover, have improved user's the experience of shooing.

In this embodiment, the intelligent mobile terminal is further provided with a switch button, as shown in fig. 6. The switch key can realize one-key on/off of the lighting device. When the lighting device is not needed, the lighting device is turned off, and electric energy can be effectively saved.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. An LED driving circuit is characterized by comprising a direct-current power supply, a touch circuit and a main control circuit, wherein the output end of the direct-current power supply is used for being connected with an LED lamp to provide electric energy for the LED lamp, the output end of the touch circuit is connected with the input end of the main control circuit, and the output end of the main control circuit is used for being connected with the LED lamp to control the brightness and the color temperature of the LED lamp; the LED driving circuit further comprises a switch circuit, the output end of the main control circuit is connected with the input end of the switch circuit, the output end of the direct current power supply is connected with the input end of the switch circuit, and the output end of the switch circuit is used for being connected with the LED lamp.

2. The LED driving circuit according to claim 1, further comprising a voltage boosting circuit, wherein an output terminal of the switching circuit is connected to an input terminal of the voltage boosting circuit, and an output terminal of the voltage boosting circuit is used for connecting the LED lamp.

3. The LED driving circuit according to claim 1 or 2, wherein the touch circuit comprises a touch key and a touch chip, an output end of the touch key is connected with an input end of the touch chip, and an output end of the touch chip is connected with an input end of the main control circuit.

4. The LED driving circuit according to claim 3, wherein the touch keys comprise a brightness adjustment key and a color temperature adjustment key.

5. A lighting device comprising an LED driving circuit as claimed in any one of claims 1 to 4 and an LED lamp, wherein an output terminal of the LED driving circuit is connected to an input terminal of the LED lamp for driving the LED lamp.

6. A lighting device as recited in claim 5, further comprising a switch button, an output terminal of said switch button being connected to an input terminal of said main control circuit for one-key on/off operation of said lighting device.

7. A lighting device as claimed in claim 5 or 6, wherein said LED lamp is an annular lamp.

8. An intelligent mobile terminal, characterized in that it comprises a lighting device according to any one of claims 5 to 7, said lighting device being arranged on top of said intelligent mobile terminal.